// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.2.0) (proxy/transparent/TransparentUpgradeableProxy.sol)

pragma solidity ^0.8.22;

import {ERC1967Utils} from "../ERC1967/ERC1967Utils.sol";
import {ERC1967Proxy} from "../ERC1967/ERC1967Proxy.sol";
import {IERC1967} from "../../interfaces/IERC1967.sol";
import {ProxyAdmin} from "./ProxyAdmin.sol";

/**
 * @dev Interface for {TransparentUpgradeableProxy}. In order to implement transparency, {TransparentUpgradeableProxy}
 * does not implement this interface directly, and its upgradeability mechanism is implemented by an internal dispatch
 * mechanism. The compiler is unaware that these functions are implemented by {TransparentUpgradeableProxy} and will not
 * include them in the ABI so this interface must be used to interact with it.
 */
interface ITransparentUpgradeableProxy is IERC1967 {
    /// @dev See {UUPSUpgradeable-upgradeToAndCall}
    function upgradeToAndCall(address newImplementation, bytes calldata data) external payable;
}

/**
 * @dev This contract implements a proxy that is upgradeable through an associated {ProxyAdmin} instance.
 *
 * To avoid https://medium.com/nomic-labs-blog/malicious-backdoors-in-ethereum-proxies-62629adf3357[proxy selector
 * clashing], which can potentially be used in an attack, this contract uses the
 * https://blog.openzeppelin.com/the-transparent-proxy-pattern/[transparent proxy pattern]. This pattern implies two
 * things that go hand in hand:
 *
 * 1. If any account other than the admin calls the proxy, the call will be forwarded to the implementation, even if
 * that call matches the {ITransparentUpgradeableProxy-upgradeToAndCall} function exposed by the proxy itself.
 * 2. If the admin calls the proxy, it can call the `upgradeToAndCall` function but any other call won't be forwarded to
 * the implementation. If the admin tries to call a function on the implementation it will fail with an error indicating
 * the proxy admin cannot fallback to the target implementation.
 *
 * These properties mean that the admin account can only be used for upgrading the proxy, so it's best if it's a
 * dedicated account that is not used for anything else. This will avoid headaches due to sudden errors when trying to
 * call a function from the proxy implementation. For this reason, the proxy deploys an instance of {ProxyAdmin} and
 * allows upgrades only if they come through it. You should think of the `ProxyAdmin` instance as the administrative
 * interface of the proxy, including the ability to change who can trigger upgrades by transferring ownership.
 *
 * NOTE: The real interface of this proxy is that defined in `ITransparentUpgradeableProxy`. This contract does not
 * inherit from that interface, and instead `upgradeToAndCall` is implicitly implemented using a custom dispatch
 * mechanism in `_fallback`. Consequently, the compiler will not produce an ABI for this contract. This is necessary to
 * fully implement transparency without decoding reverts caused by selector clashes between the proxy and the
 * implementation.
 *
 * NOTE: This proxy does not inherit from {Context} deliberately. The {ProxyAdmin} of this contract won't send a
 * meta-transaction in any way, and any other meta-transaction setup should be made in the implementation contract.
 *
 * IMPORTANT: This contract avoids unnecessary storage reads by setting the admin only during construction as an
 * immutable variable, preventing any changes thereafter. However, the admin slot defined in ERC-1967 can still be
 * overwritten by the implementation logic pointed to by this proxy. In such cases, the contract may end up in an
 * undesirable state where the admin slot is different from the actual admin. Relying on the value of the admin slot
 * is generally fine if the implementation is trusted.
 *
 * WARNING: It is not recommended to extend this contract to add additional external functions. If you do so, the
 * compiler will not check that there are no selector conflicts, due to the note above. A selector clash between any new
 * function and the functions declared in {ITransparentUpgradeableProxy} will be resolved in favor of the new one. This
 * could render the `upgradeToAndCall` function inaccessible, preventing upgradeability and compromising transparency.
 */
contract TransparentUpgradeableProxy is ERC1967Proxy {
    // An immutable address for the admin to avoid unnecessary SLOADs before each call
    // at the expense of removing the ability to change the admin once it's set.
    // This is acceptable if the admin is always a ProxyAdmin instance or similar contract
    // with its own ability to transfer the permissions to another account.
    address private immutable _admin;

    /**
     * @dev The proxy caller is the current admin, and can't fallback to the proxy target.
     */
    error ProxyDeniedAdminAccess();

    /**
     * @dev Initializes an upgradeable proxy managed by an instance of a {ProxyAdmin} with an `initialOwner`,
     * backed by the implementation at `_logic`, and optionally initialized with `_data` as explained in
     * {ERC1967Proxy-constructor}.
     */
    constructor(address _logic, address initialOwner, bytes memory _data) payable ERC1967Proxy(_logic, _data) {
        _admin = address(new ProxyAdmin(initialOwner));
        // Set the storage value and emit an event for ERC-1967 compatibility
        ERC1967Utils.changeAdmin(_proxyAdmin());
    }

    /**
     * @dev Returns the admin of this proxy.
     */
    function _proxyAdmin() internal view virtual returns (address) {
        return _admin;
    }

    /**
     * @dev If caller is the admin process the call internally, otherwise transparently fallback to the proxy behavior.
     */
    function _fallback() internal virtual override {
        if (msg.sender == _proxyAdmin()) {
            if (msg.sig != ITransparentUpgradeableProxy.upgradeToAndCall.selector) {
                revert ProxyDeniedAdminAccess();
            } else {
                _dispatchUpgradeToAndCall();
            }
        } else {
            super._fallback();
        }
    }

    /**
     * @dev Upgrade the implementation of the proxy. See {ERC1967Utils-upgradeToAndCall}.
     *
     * Requirements:
     *
     * - If `data` is empty, `msg.value` must be zero.
     */
    function _dispatchUpgradeToAndCall() private {
        (address newImplementation, bytes memory data) = abi.decode(msg.data[4:], (address, bytes));
        ERC1967Utils.upgradeToAndCall(newImplementation, data);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (access/AccessControl.sol)

pragma solidity ^0.8.20;

import {IAccessControl} from "@openzeppelin/contracts/access/IAccessControl.sol";
import {ContextUpgradeable} from "../utils/ContextUpgradeable.sol";
import {IERC165} from "@openzeppelin/contracts/utils/introspection/IERC165.sol";
import {ERC165Upgradeable} from "../utils/introspection/ERC165Upgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.sol";

/**
 * @dev Contract module that allows children to implement role-based access
 * control mechanisms. This is a lightweight version that doesn't allow enumerating role
 * members except through off-chain means by accessing the contract event logs. Some
 * applications may benefit from on-chain enumerability, for those cases see
 * {AccessControlEnumerable}.
 *
 * Roles are referred to by their `bytes32` identifier. These should be exposed
 * in the external API and be unique. The best way to achieve this is by
 * using `public constant` hash digests:
 *
 * ```solidity
 * bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
 * ```
 *
 * Roles can be used to represent a set of permissions. To restrict access to a
 * function call, use {hasRole}:
 *
 * ```solidity
 * function foo() public {
 *     require(hasRole(MY_ROLE, msg.sender));
 *     ...
 * }
 * ```
 *
 * Roles can be granted and revoked dynamically via the {grantRole} and
 * {revokeRole} functions. Each role has an associated admin role, and only
 * accounts that have a role's admin role can call {grantRole} and {revokeRole}.
 *
 * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
 * that only accounts with this role will be able to grant or revoke other
 * roles. More complex role relationships can be created by using
 * {_setRoleAdmin}.
 *
 * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
 * grant and revoke this role. Extra precautions should be taken to secure
 * accounts that have been granted it. We recommend using {AccessControlDefaultAdminRules}
 * to enforce additional security measures for this role.
 */
abstract contract AccessControlUpgradeable is Initializable, ContextUpgradeable, IAccessControl, ERC165Upgradeable {
    struct RoleData {
        mapping(address account => bool) hasRole;
        bytes32 adminRole;
    }

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;


    /// @custom:storage-location erc7201:openzeppelin.storage.AccessControl
    struct AccessControlStorage {
        mapping(bytes32 role => RoleData) _roles;
    }

    // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.AccessControl")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant AccessControlStorageLocation = 0x02dd7bc7dec4dceedda775e58dd541e08a116c6c53815c0bd028192f7b626800;

    function _getAccessControlStorage() private pure returns (AccessControlStorage storage $) {
        assembly {
            $.slot := AccessControlStorageLocation
        }
    }

    /**
     * @dev Modifier that checks that an account has a specific role. Reverts
     * with an {AccessControlUnauthorizedAccount} error including the required role.
     */
    modifier onlyRole(bytes32 role) {
        _checkRole(role);
        _;
    }

    function __AccessControl_init() internal onlyInitializing {
    }

    function __AccessControl_init_unchained() internal onlyInitializing {
    }
    /// @inheritdoc IERC165
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) public view virtual returns (bool) {
        AccessControlStorage storage $ = _getAccessControlStorage();
        return $._roles[role].hasRole[account];
    }

    /**
     * @dev Reverts with an {AccessControlUnauthorizedAccount} error if `_msgSender()`
     * is missing `role`. Overriding this function changes the behavior of the {onlyRole} modifier.
     */
    function _checkRole(bytes32 role) internal view virtual {
        _checkRole(role, _msgSender());
    }

    /**
     * @dev Reverts with an {AccessControlUnauthorizedAccount} error if `account`
     * is missing `role`.
     */
    function _checkRole(bytes32 role, address account) internal view virtual {
        if (!hasRole(role, account)) {
            revert AccessControlUnauthorizedAccount(account, role);
        }
    }

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) public view virtual returns (bytes32) {
        AccessControlStorage storage $ = _getAccessControlStorage();
        return $._roles[role].adminRole;
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleGranted} event.
     */
    function grantRole(bytes32 role, address account) public virtual onlyRole(getRoleAdmin(role)) {
        _grantRole(role, account);
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleRevoked} event.
     */
    function revokeRole(bytes32 role, address account) public virtual onlyRole(getRoleAdmin(role)) {
        _revokeRole(role, account);
    }

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been revoked `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `callerConfirmation`.
     *
     * May emit a {RoleRevoked} event.
     */
    function renounceRole(bytes32 role, address callerConfirmation) public virtual {
        if (callerConfirmation != _msgSender()) {
            revert AccessControlBadConfirmation();
        }

        _revokeRole(role, callerConfirmation);
    }

    /**
     * @dev Sets `adminRole` as ``role``'s admin role.
     *
     * Emits a {RoleAdminChanged} event.
     */
    function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
        AccessControlStorage storage $ = _getAccessControlStorage();
        bytes32 previousAdminRole = getRoleAdmin(role);
        $._roles[role].adminRole = adminRole;
        emit RoleAdminChanged(role, previousAdminRole, adminRole);
    }

    /**
     * @dev Attempts to grant `role` to `account` and returns a boolean indicating if `role` was granted.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleGranted} event.
     */
    function _grantRole(bytes32 role, address account) internal virtual returns (bool) {
        AccessControlStorage storage $ = _getAccessControlStorage();
        if (!hasRole(role, account)) {
            $._roles[role].hasRole[account] = true;
            emit RoleGranted(role, account, _msgSender());
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Attempts to revoke `role` from `account` and returns a boolean indicating if `role` was revoked.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleRevoked} event.
     */
    function _revokeRole(bytes32 role, address account) internal virtual returns (bool) {
        AccessControlStorage storage $ = _getAccessControlStorage();
        if (hasRole(role, account)) {
            $._roles[role].hasRole[account] = false;
            emit RoleRevoked(role, account, _msgSender());
            return true;
        } else {
            return false;
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.3.0) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.20;

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
 * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
 * case an upgrade adds a module that needs to be initialized.
 *
 * For example:
 *
 * [.hljs-theme-light.nopadding]
 * ```solidity
 * contract MyToken is ERC20Upgradeable {
 *     function initialize() initializer public {
 *         __ERC20_init("MyToken", "MTK");
 *     }
 * }
 *
 * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
 *     function initializeV2() reinitializer(2) public {
 *         __ERC20Permit_init("MyToken");
 *     }
 * }
 * ```
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
 * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() {
 *     _disableInitializers();
 * }
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Storage of the initializable contract.
     *
     * It's implemented on a custom ERC-7201 namespace to reduce the risk of storage collisions
     * when using with upgradeable contracts.
     *
     * @custom:storage-location erc7201:openzeppelin.storage.Initializable
     */
    struct InitializableStorage {
        /**
         * @dev Indicates that the contract has been initialized.
         */
        uint64 _initialized;
        /**
         * @dev Indicates that the contract is in the process of being initialized.
         */
        bool _initializing;
    }

    // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Initializable")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant INITIALIZABLE_STORAGE = 0xf0c57e16840df040f15088dc2f81fe391c3923bec73e23a9662efc9c229c6a00;

    /**
     * @dev The contract is already initialized.
     */
    error InvalidInitialization();

    /**
     * @dev The contract is not initializing.
     */
    error NotInitializing();

    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint64 version);

    /**
     * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
     * `onlyInitializing` functions can be used to initialize parent contracts.
     *
     * Similar to `reinitializer(1)`, except that in the context of a constructor an `initializer` may be invoked any
     * number of times. This behavior in the constructor can be useful during testing and is not expected to be used in
     * production.
     *
     * Emits an {Initialized} event.
     */
    modifier initializer() {
        // solhint-disable-next-line var-name-mixedcase
        InitializableStorage storage $ = _getInitializableStorage();

        // Cache values to avoid duplicated sloads
        bool isTopLevelCall = !$._initializing;
        uint64 initialized = $._initialized;

        // Allowed calls:
        // - initialSetup: the contract is not in the initializing state and no previous version was
        //                 initialized
        // - construction: the contract is initialized at version 1 (no reinitialization) and the
        //                 current contract is just being deployed
        bool initialSetup = initialized == 0 && isTopLevelCall;
        bool construction = initialized == 1 && address(this).code.length == 0;

        if (!initialSetup && !construction) {
            revert InvalidInitialization();
        }
        $._initialized = 1;
        if (isTopLevelCall) {
            $._initializing = true;
        }
        _;
        if (isTopLevelCall) {
            $._initializing = false;
            emit Initialized(1);
        }
    }

    /**
     * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
     * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
     * used to initialize parent contracts.
     *
     * A reinitializer may be used after the original initialization step. This is essential to configure modules that
     * are added through upgrades and that require initialization.
     *
     * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`
     * cannot be nested. If one is invoked in the context of another, execution will revert.
     *
     * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
     * a contract, executing them in the right order is up to the developer or operator.
     *
     * WARNING: Setting the version to 2**64 - 1 will prevent any future reinitialization.
     *
     * Emits an {Initialized} event.
     */
    modifier reinitializer(uint64 version) {
        // solhint-disable-next-line var-name-mixedcase
        InitializableStorage storage $ = _getInitializableStorage();

        if ($._initializing || $._initialized >= version) {
            revert InvalidInitialization();
        }
        $._initialized = version;
        $._initializing = true;
        _;
        $._initializing = false;
        emit Initialized(version);
    }

    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} and {reinitializer} modifiers, directly or indirectly.
     */
    modifier onlyInitializing() {
        _checkInitializing();
        _;
    }

    /**
     * @dev Reverts if the contract is not in an initializing state. See {onlyInitializing}.
     */
    function _checkInitializing() internal view virtual {
        if (!_isInitializing()) {
            revert NotInitializing();
        }
    }

    /**
     * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
     * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
     * to any version. It is recommended to use this to lock implementation contracts that are designed to be called
     * through proxies.
     *
     * Emits an {Initialized} event the first time it is successfully executed.
     */
    function _disableInitializers() internal virtual {
        // solhint-disable-next-line var-name-mixedcase
        InitializableStorage storage $ = _getInitializableStorage();

        if ($._initializing) {
            revert InvalidInitialization();
        }
        if ($._initialized != type(uint64).max) {
            $._initialized = type(uint64).max;
            emit Initialized(type(uint64).max);
        }
    }

    /**
     * @dev Returns the highest version that has been initialized. See {reinitializer}.
     */
    function _getInitializedVersion() internal view returns (uint64) {
        return _getInitializableStorage()._initialized;
    }

    /**
     * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.
     */
    function _isInitializing() internal view returns (bool) {
        return _getInitializableStorage()._initializing;
    }

    /**
     * @dev Pointer to storage slot. Allows integrators to override it with a custom storage location.
     *
     * NOTE: Consider following the ERC-7201 formula to derive storage locations.
     */
    function _initializableStorageSlot() internal pure virtual returns (bytes32) {
        return INITIALIZABLE_STORAGE;
    }

    /**
     * @dev Returns a pointer to the storage namespace.
     */
    // solhint-disable-next-line var-name-mixedcase
    function _getInitializableStorage() private pure returns (InitializableStorage storage $) {
        bytes32 slot = _initializableStorageSlot();
        assembly {
            $.slot := slot
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)

pragma solidity ^0.8.20;
import {Initializable} from "../proxy/utils/Initializable.sol";

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract ContextUpgradeable is Initializable {
    function __Context_init() internal onlyInitializing {
    }

    function __Context_init_unchained() internal onlyInitializing {
    }
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (utils/introspection/ERC165.sol)

pragma solidity ^0.8.20;

import {IERC165} from "@openzeppelin/contracts/utils/introspection/IERC165.sol";
import {Initializable} from "../../proxy/utils/Initializable.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC-165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 */
abstract contract ERC165Upgradeable is Initializable, IERC165 {
    function __ERC165_init() internal onlyInitializing {
    }

    function __ERC165_init_unchained() internal onlyInitializing {
    }
    /// @inheritdoc IERC165
    function supportsInterface(bytes4 interfaceId) public view virtual returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.3.0) (utils/Pausable.sol)

pragma solidity ^0.8.20;

import {ContextUpgradeable} from "../utils/ContextUpgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.sol";

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract PausableUpgradeable is Initializable, ContextUpgradeable {
    /// @custom:storage-location erc7201:openzeppelin.storage.Pausable
    struct PausableStorage {
        bool _paused;
    }

    // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Pausable")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant PausableStorageLocation = 0xcd5ed15c6e187e77e9aee88184c21f4f2182ab5827cb3b7e07fbedcd63f03300;

    function _getPausableStorage() private pure returns (PausableStorage storage $) {
        assembly {
            $.slot := PausableStorageLocation
        }
    }

    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    /**
     * @dev The operation failed because the contract is paused.
     */
    error EnforcedPause();

    /**
     * @dev The operation failed because the contract is not paused.
     */
    error ExpectedPause();

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        _requireNotPaused();
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        _requirePaused();
        _;
    }

    function __Pausable_init() internal onlyInitializing {
    }

    function __Pausable_init_unchained() internal onlyInitializing {
    }
    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        PausableStorage storage $ = _getPausableStorage();
        return $._paused;
    }

    /**
     * @dev Throws if the contract is paused.
     */
    function _requireNotPaused() internal view virtual {
        if (paused()) {
            revert EnforcedPause();
        }
    }

    /**
     * @dev Throws if the contract is not paused.
     */
    function _requirePaused() internal view virtual {
        if (!paused()) {
            revert ExpectedPause();
        }
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        PausableStorage storage $ = _getPausableStorage();
        $._paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        PausableStorage storage $ = _getPausableStorage();
        $._paused = false;
        emit Unpaused(_msgSender());
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/ReentrancyGuard.sol)

pragma solidity ^0.8.20;
import {Initializable} from "../proxy/utils/Initializable.sol";

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If EIP-1153 (transient storage) is available on the chain you're deploying at,
 * consider using {ReentrancyGuardTransient} instead.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuardUpgradeable is Initializable {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant NOT_ENTERED = 1;
    uint256 private constant ENTERED = 2;

    /// @custom:storage-location erc7201:openzeppelin.storage.ReentrancyGuard
    struct ReentrancyGuardStorage {
        uint256 _status;
    }

    // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.ReentrancyGuard")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant ReentrancyGuardStorageLocation = 0x9b779b17422d0df92223018b32b4d1fa46e071723d6817e2486d003becc55f00;

    function _getReentrancyGuardStorage() private pure returns (ReentrancyGuardStorage storage $) {
        assembly {
            $.slot := ReentrancyGuardStorageLocation
        }
    }

    /**
     * @dev Unauthorized reentrant call.
     */
    error ReentrancyGuardReentrantCall();

    function __ReentrancyGuard_init() internal onlyInitializing {
        __ReentrancyGuard_init_unchained();
    }

    function __ReentrancyGuard_init_unchained() internal onlyInitializing {
        ReentrancyGuardStorage storage $ = _getReentrancyGuardStorage();
        $._status = NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        ReentrancyGuardStorage storage $ = _getReentrancyGuardStorage();
        // On the first call to nonReentrant, _status will be NOT_ENTERED
        if ($._status == ENTERED) {
            revert ReentrancyGuardReentrantCall();
        }

        // Any calls to nonReentrant after this point will fail
        $._status = ENTERED;
    }

    function _nonReentrantAfter() private {
        ReentrancyGuardStorage storage $ = _getReentrancyGuardStorage();
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        $._status = NOT_ENTERED;
    }

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        ReentrancyGuardStorage storage $ = _getReentrancyGuardStorage();
        return $._status == ENTERED;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (access/IAccessControl.sol)

pragma solidity >=0.8.4;

/**
 * @dev External interface of AccessControl declared to support ERC-165 detection.
 */
interface IAccessControl {
    /**
     * @dev The `account` is missing a role.
     */
    error AccessControlUnauthorizedAccount(address account, bytes32 neededRole);

    /**
     * @dev The caller of a function is not the expected one.
     *
     * NOTE: Don't confuse with {AccessControlUnauthorizedAccount}.
     */
    error AccessControlBadConfirmation();

    /**
     * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
     *
     * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
     * {RoleAdminChanged} not being emitted to signal this.
     */
    event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);

    /**
     * @dev Emitted when `account` is granted `role`.
     *
     * `sender` is the account that originated the contract call. This account bears the admin role (for the granted role).
     * Expected in cases where the role was granted using the internal {AccessControl-_grantRole}.
     */
    event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Emitted when `account` is revoked `role`.
     *
     * `sender` is the account that originated the contract call:
     *   - if using `revokeRole`, it is the admin role bearer
     *   - if using `renounceRole`, it is the role bearer (i.e. `account`)
     */
    event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) external view returns (bool);

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {AccessControl-_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) external view returns (bytes32);

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function grantRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function revokeRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been granted `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `callerConfirmation`.
     */
    function renounceRole(bytes32 role, address callerConfirmation) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)

pragma solidity ^0.8.20;

import {Context} from "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * The initial owner is set to the address provided by the deployer. This can
 * later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    /**
     * @dev The caller account is not authorized to perform an operation.
     */
    error OwnableUnauthorizedAccount(address account);

    /**
     * @dev The owner is not a valid owner account. (eg. `address(0)`)
     */
    error OwnableInvalidOwner(address owner);

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
     */
    constructor(address initialOwner) {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/draft-IERC6093.sol)
pragma solidity >=0.8.4;

/**
 * @dev Standard ERC-20 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-20 tokens.
 */
interface IERC20Errors {
    /**
     * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param balance Current balance for the interacting account.
     * @param needed Minimum amount required to perform a transfer.
     */
    error ERC20InsufficientBalance(address sender, uint256 balance, uint256 needed);

    /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
    error ERC20InvalidSender(address sender);

    /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
    error ERC20InvalidReceiver(address receiver);

    /**
     * @dev Indicates a failure with the `spender`’s `allowance`. Used in transfers.
     * @param spender Address that may be allowed to operate on tokens without being their owner.
     * @param allowance Amount of tokens a `spender` is allowed to operate with.
     * @param needed Minimum amount required to perform a transfer.
     */
    error ERC20InsufficientAllowance(address spender, uint256 allowance, uint256 needed);

    /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
    error ERC20InvalidApprover(address approver);

    /**
     * @dev Indicates a failure with the `spender` to be approved. Used in approvals.
     * @param spender Address that may be allowed to operate on tokens without being their owner.
     */
    error ERC20InvalidSpender(address spender);
}

/**
 * @dev Standard ERC-721 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-721 tokens.
 */
interface IERC721Errors {
    /**
     * @dev Indicates that an address can't be an owner. For example, `address(0)` is a forbidden owner in ERC-20.
     * Used in balance queries.
     * @param owner Address of the current owner of a token.
     */
    error ERC721InvalidOwner(address owner);

    /**
     * @dev Indicates a `tokenId` whose `owner` is the zero address.
     * @param tokenId Identifier number of a token.
     */
    error ERC721NonexistentToken(uint256 tokenId);

    /**
     * @dev Indicates an error related to the ownership over a particular token. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param tokenId Identifier number of a token.
     * @param owner Address of the current owner of a token.
     */
    error ERC721IncorrectOwner(address sender, uint256 tokenId, address owner);

    /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
    error ERC721InvalidSender(address sender);

    /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
    error ERC721InvalidReceiver(address receiver);

    /**
     * @dev Indicates a failure with the `operator`’s approval. Used in transfers.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     * @param tokenId Identifier number of a token.
     */
    error ERC721InsufficientApproval(address operator, uint256 tokenId);

    /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
    error ERC721InvalidApprover(address approver);

    /**
     * @dev Indicates a failure with the `operator` to be approved. Used in approvals.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     */
    error ERC721InvalidOperator(address operator);
}

/**
 * @dev Standard ERC-1155 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-1155 tokens.
 */
interface IERC1155Errors {
    /**
     * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param balance Current balance for the interacting account.
     * @param needed Minimum amount required to perform a transfer.
     * @param tokenId Identifier number of a token.
     */
    error ERC1155InsufficientBalance(address sender, uint256 balance, uint256 needed, uint256 tokenId);

    /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
    error ERC1155InvalidSender(address sender);

    /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
    error ERC1155InvalidReceiver(address receiver);

    /**
     * @dev Indicates a failure with the `operator`’s approval. Used in transfers.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     * @param owner Address of the current owner of a token.
     */
    error ERC1155MissingApprovalForAll(address operator, address owner);

    /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
    error ERC1155InvalidApprover(address approver);

    /**
     * @dev Indicates a failure with the `operator` to be approved. Used in approvals.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     */
    error ERC1155InvalidOperator(address operator);

    /**
     * @dev Indicates an array length mismatch between ids and values in a safeBatchTransferFrom operation.
     * Used in batch transfers.
     * @param idsLength Length of the array of token identifiers
     * @param valuesLength Length of the array of token amounts
     */
    error ERC1155InvalidArrayLength(uint256 idsLength, uint256 valuesLength);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC1363.sol)

pragma solidity >=0.6.2;

import {IERC20} from "./IERC20.sol";
import {IERC165} from "./IERC165.sol";

/**
 * @title IERC1363
 * @dev Interface of the ERC-1363 standard as defined in the https://eips.ethereum.org/EIPS/eip-1363[ERC-1363].
 *
 * Defines an extension interface for ERC-20 tokens that supports executing code on a recipient contract
 * after `transfer` or `transferFrom`, or code on a spender contract after `approve`, in a single transaction.
 */
interface IERC1363 is IERC20, IERC165 {
    /*
     * Note: the ERC-165 identifier for this interface is 0xb0202a11.
     * 0xb0202a11 ===
     *   bytes4(keccak256('transferAndCall(address,uint256)')) ^
     *   bytes4(keccak256('transferAndCall(address,uint256,bytes)')) ^
     *   bytes4(keccak256('transferFromAndCall(address,address,uint256)')) ^
     *   bytes4(keccak256('transferFromAndCall(address,address,uint256,bytes)')) ^
     *   bytes4(keccak256('approveAndCall(address,uint256)')) ^
     *   bytes4(keccak256('approveAndCall(address,uint256,bytes)'))
     */

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferAndCall(address to, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @param data Additional data with no specified format, sent in call to `to`.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferAndCall(address to, uint256 value, bytes calldata data) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param from The address which you want to send tokens from.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferFromAndCall(address from, address to, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param from The address which you want to send tokens from.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @param data Additional data with no specified format, sent in call to `to`.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferFromAndCall(address from, address to, uint256 value, bytes calldata data) external returns (bool);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens and then calls {IERC1363Spender-onApprovalReceived} on `spender`.
     * @param spender The address which will spend the funds.
     * @param value The amount of tokens to be spent.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function approveAndCall(address spender, uint256 value) external returns (bool);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens and then calls {IERC1363Spender-onApprovalReceived} on `spender`.
     * @param spender The address which will spend the funds.
     * @param value The amount of tokens to be spent.
     * @param data Additional data with no specified format, sent in call to `spender`.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function approveAndCall(address spender, uint256 value, bytes calldata data) external returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC165.sol)

pragma solidity >=0.4.16;

import {IERC165} from "../utils/introspection/IERC165.sol";

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC1967.sol)

pragma solidity >=0.4.11;

/**
 * @dev ERC-1967: Proxy Storage Slots. This interface contains the events defined in the ERC.
 */
interface IERC1967 {
    /**
     * @dev Emitted when the implementation is upgraded.
     */
    event Upgraded(address indexed implementation);

    /**
     * @dev Emitted when the admin account has changed.
     */
    event AdminChanged(address previousAdmin, address newAdmin);

    /**
     * @dev Emitted when the beacon is changed.
     */
    event BeaconUpgraded(address indexed beacon);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC20.sol)

pragma solidity >=0.4.16;

import {IERC20} from "../token/ERC20/IERC20.sol";

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC5267.sol)

pragma solidity >=0.4.16;

interface IERC5267 {
    /**
     * @dev MAY be emitted to signal that the domain could have changed.
     */
    event EIP712DomainChanged();

    /**
     * @dev returns the fields and values that describe the domain separator used by this contract for EIP-712
     * signature.
     */
    function eip712Domain()
        external
        view
        returns (
            bytes1 fields,
            string memory name,
            string memory version,
            uint256 chainId,
            address verifyingContract,
            bytes32 salt,
            uint256[] memory extensions
        );
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (proxy/beacon/IBeacon.sol)

pragma solidity >=0.4.16;

/**
 * @dev This is the interface that {BeaconProxy} expects of its beacon.
 */
interface IBeacon {
    /**
     * @dev Must return an address that can be used as a delegate call target.
     *
     * {UpgradeableBeacon} will check that this address is a contract.
     */
    function implementation() external view returns (address);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.2.0) (proxy/ERC1967/ERC1967Proxy.sol)

pragma solidity ^0.8.22;

import {Proxy} from "../Proxy.sol";
import {ERC1967Utils} from "./ERC1967Utils.sol";

/**
 * @dev This contract implements an upgradeable proxy. It is upgradeable because calls are delegated to an
 * implementation address that can be changed. This address is stored in storage in the location specified by
 * https://eips.ethereum.org/EIPS/eip-1967[ERC-1967], so that it doesn't conflict with the storage layout of the
 * implementation behind the proxy.
 */
contract ERC1967Proxy is Proxy {
    /**
     * @dev Initializes the upgradeable proxy with an initial implementation specified by `implementation`.
     *
     * If `_data` is nonempty, it's used as data in a delegate call to `implementation`. This will typically be an
     * encoded function call, and allows initializing the storage of the proxy like a Solidity constructor.
     *
     * Requirements:
     *
     * - If `data` is empty, `msg.value` must be zero.
     */
    constructor(address implementation, bytes memory _data) payable {
        ERC1967Utils.upgradeToAndCall(implementation, _data);
    }

    /**
     * @dev Returns the current implementation address.
     *
     * TIP: To get this value clients can read directly from the storage slot shown below (specified by ERC-1967) using
     * the https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call.
     * `0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc`
     */
    function _implementation() internal view virtual override returns (address) {
        return ERC1967Utils.getImplementation();
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (proxy/ERC1967/ERC1967Utils.sol)

pragma solidity ^0.8.21;

import {IBeacon} from "../beacon/IBeacon.sol";
import {IERC1967} from "../../interfaces/IERC1967.sol";
import {Address} from "../../utils/Address.sol";
import {StorageSlot} from "../../utils/StorageSlot.sol";

/**
 * @dev This library provides getters and event emitting update functions for
 * https://eips.ethereum.org/EIPS/eip-1967[ERC-1967] slots.
 */
library ERC1967Utils {
    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1.
     */
    // solhint-disable-next-line private-vars-leading-underscore
    bytes32 internal constant IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

    /**
     * @dev The `implementation` of the proxy is invalid.
     */
    error ERC1967InvalidImplementation(address implementation);

    /**
     * @dev The `admin` of the proxy is invalid.
     */
    error ERC1967InvalidAdmin(address admin);

    /**
     * @dev The `beacon` of the proxy is invalid.
     */
    error ERC1967InvalidBeacon(address beacon);

    /**
     * @dev An upgrade function sees `msg.value > 0` that may be lost.
     */
    error ERC1967NonPayable();

    /**
     * @dev Returns the current implementation address.
     */
    function getImplementation() internal view returns (address) {
        return StorageSlot.getAddressSlot(IMPLEMENTATION_SLOT).value;
    }

    /**
     * @dev Stores a new address in the ERC-1967 implementation slot.
     */
    function _setImplementation(address newImplementation) private {
        if (newImplementation.code.length == 0) {
            revert ERC1967InvalidImplementation(newImplementation);
        }
        StorageSlot.getAddressSlot(IMPLEMENTATION_SLOT).value = newImplementation;
    }

    /**
     * @dev Performs implementation upgrade with additional setup call if data is nonempty.
     * This function is payable only if the setup call is performed, otherwise `msg.value` is rejected
     * to avoid stuck value in the contract.
     *
     * Emits an {IERC1967-Upgraded} event.
     */
    function upgradeToAndCall(address newImplementation, bytes memory data) internal {
        _setImplementation(newImplementation);
        emit IERC1967.Upgraded(newImplementation);

        if (data.length > 0) {
            Address.functionDelegateCall(newImplementation, data);
        } else {
            _checkNonPayable();
        }
    }

    /**
     * @dev Storage slot with the admin of the contract.
     * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1.
     */
    // solhint-disable-next-line private-vars-leading-underscore
    bytes32 internal constant ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;

    /**
     * @dev Returns the current admin.
     *
     * TIP: To get this value clients can read directly from the storage slot shown below (specified by ERC-1967) using
     * the https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call.
     * `0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103`
     */
    function getAdmin() internal view returns (address) {
        return StorageSlot.getAddressSlot(ADMIN_SLOT).value;
    }

    /**
     * @dev Stores a new address in the ERC-1967 admin slot.
     */
    function _setAdmin(address newAdmin) private {
        if (newAdmin == address(0)) {
            revert ERC1967InvalidAdmin(address(0));
        }
        StorageSlot.getAddressSlot(ADMIN_SLOT).value = newAdmin;
    }

    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {IERC1967-AdminChanged} event.
     */
    function changeAdmin(address newAdmin) internal {
        emit IERC1967.AdminChanged(getAdmin(), newAdmin);
        _setAdmin(newAdmin);
    }

    /**
     * @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
     * This is the keccak-256 hash of "eip1967.proxy.beacon" subtracted by 1.
     */
    // solhint-disable-next-line private-vars-leading-underscore
    bytes32 internal constant BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;

    /**
     * @dev Returns the current beacon.
     */
    function getBeacon() internal view returns (address) {
        return StorageSlot.getAddressSlot(BEACON_SLOT).value;
    }

    /**
     * @dev Stores a new beacon in the ERC-1967 beacon slot.
     */
    function _setBeacon(address newBeacon) private {
        if (newBeacon.code.length == 0) {
            revert ERC1967InvalidBeacon(newBeacon);
        }

        StorageSlot.getAddressSlot(BEACON_SLOT).value = newBeacon;

        address beaconImplementation = IBeacon(newBeacon).implementation();
        if (beaconImplementation.code.length == 0) {
            revert ERC1967InvalidImplementation(beaconImplementation);
        }
    }

    /**
     * @dev Change the beacon and trigger a setup call if data is nonempty.
     * This function is payable only if the setup call is performed, otherwise `msg.value` is rejected
     * to avoid stuck value in the contract.
     *
     * Emits an {IERC1967-BeaconUpgraded} event.
     *
     * CAUTION: Invoking this function has no effect on an instance of {BeaconProxy} since v5, since
     * it uses an immutable beacon without looking at the value of the ERC-1967 beacon slot for
     * efficiency.
     */
    function upgradeBeaconToAndCall(address newBeacon, bytes memory data) internal {
        _setBeacon(newBeacon);
        emit IERC1967.BeaconUpgraded(newBeacon);

        if (data.length > 0) {
            Address.functionDelegateCall(IBeacon(newBeacon).implementation(), data);
        } else {
            _checkNonPayable();
        }
    }

    /**
     * @dev Reverts if `msg.value` is not zero. It can be used to avoid `msg.value` stuck in the contract
     * if an upgrade doesn't perform an initialization call.
     */
    function _checkNonPayable() private {
        if (msg.value > 0) {
            revert ERC1967NonPayable();
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (proxy/Proxy.sol)

pragma solidity ^0.8.20;

/**
 * @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
 * instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
 * be specified by overriding the virtual {_implementation} function.
 *
 * Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
 * different contract through the {_delegate} function.
 *
 * The success and return data of the delegated call will be returned back to the caller of the proxy.
 */
abstract contract Proxy {
    /**
     * @dev Delegates the current call to `implementation`.
     *
     * This function does not return to its internal call site, it will return directly to the external caller.
     */
    function _delegate(address implementation) internal virtual {
        assembly {
            // Copy msg.data. We take full control of memory in this inline assembly
            // block because it will not return to Solidity code. We overwrite the
            // Solidity scratch pad at memory position 0.
            calldatacopy(0, 0, calldatasize())

            // Call the implementation.
            // out and outsize are 0 because we don't know the size yet.
            let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)

            // Copy the returned data.
            returndatacopy(0, 0, returndatasize())

            switch result
            // delegatecall returns 0 on error.
            case 0 {
                revert(0, returndatasize())
            }
            default {
                return(0, returndatasize())
            }
        }
    }

    /**
     * @dev This is a virtual function that should be overridden so it returns the address to which the fallback
     * function and {_fallback} should delegate.
     */
    function _implementation() internal view virtual returns (address);

    /**
     * @dev Delegates the current call to the address returned by `_implementation()`.
     *
     * This function does not return to its internal call site, it will return directly to the external caller.
     */
    function _fallback() internal virtual {
        _delegate(_implementation());
    }

    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
     * function in the contract matches the call data.
     */
    fallback() external payable virtual {
        _fallback();
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.2.0) (proxy/transparent/ProxyAdmin.sol)

pragma solidity ^0.8.22;

import {ITransparentUpgradeableProxy} from "./TransparentUpgradeableProxy.sol";
import {Ownable} from "../../access/Ownable.sol";

/**
 * @dev This is an auxiliary contract meant to be assigned as the admin of a {TransparentUpgradeableProxy}. For an
 * explanation of why you would want to use this see the documentation for {TransparentUpgradeableProxy}.
 */
contract ProxyAdmin is Ownable {
    /**
     * @dev The version of the upgrade interface of the contract. If this getter is missing, both `upgrade(address,address)`
     * and `upgradeAndCall(address,address,bytes)` are present, and `upgrade` must be used if no function should be called,
     * while `upgradeAndCall` will invoke the `receive` function if the third argument is the empty byte string.
     * If the getter returns `"5.0.0"`, only `upgradeAndCall(address,address,bytes)` is present, and the third argument must
     * be the empty byte string if no function should be called, making it impossible to invoke the `receive` function
     * during an upgrade.
     */
    string public constant UPGRADE_INTERFACE_VERSION = "5.0.0";

    /**
     * @dev Sets the initial owner who can perform upgrades.
     */
    constructor(address initialOwner) Ownable(initialOwner) {}

    /**
     * @dev Upgrades `proxy` to `implementation` and calls a function on the new implementation.
     * See {TransparentUpgradeableProxy-_dispatchUpgradeToAndCall}.
     *
     * Requirements:
     *
     * - This contract must be the admin of `proxy`.
     * - If `data` is empty, `msg.value` must be zero.
     */
    function upgradeAndCall(
        ITransparentUpgradeableProxy proxy,
        address implementation,
        bytes memory data
    ) public payable virtual onlyOwner {
        proxy.upgradeToAndCall{value: msg.value}(implementation, data);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC1155/IERC1155.sol)

pragma solidity >=0.6.2;

import {IERC165} from "../../utils/introspection/IERC165.sol";

/**
 * @dev Required interface of an ERC-1155 compliant contract, as defined in the
 * https://eips.ethereum.org/EIPS/eip-1155[ERC].
 */
interface IERC1155 is IERC165 {
    /**
     * @dev Emitted when `value` amount of tokens of type `id` are transferred from `from` to `to` by `operator`.
     */
    event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);

    /**
     * @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
     * transfers.
     */
    event TransferBatch(
        address indexed operator,
        address indexed from,
        address indexed to,
        uint256[] ids,
        uint256[] values
    );

    /**
     * @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
     * `approved`.
     */
    event ApprovalForAll(address indexed account, address indexed operator, bool approved);

    /**
     * @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
     *
     * If an {URI} event was emitted for `id`, the standard
     * https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
     * returned by {IERC1155MetadataURI-uri}.
     */
    event URI(string value, uint256 indexed id);

    /**
     * @dev Returns the value of tokens of token type `id` owned by `account`.
     */
    function balanceOf(address account, uint256 id) external view returns (uint256);

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
     *
     * Requirements:
     *
     * - `accounts` and `ids` must have the same length.
     */
    function balanceOfBatch(
        address[] calldata accounts,
        uint256[] calldata ids
    ) external view returns (uint256[] memory);

    /**
     * @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
     *
     * Emits an {ApprovalForAll} event.
     *
     * Requirements:
     *
     * - `operator` cannot be the zero address.
     */
    function setApprovalForAll(address operator, bool approved) external;

    /**
     * @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
     *
     * See {setApprovalForAll}.
     */
    function isApprovedForAll(address account, address operator) external view returns (bool);

    /**
     * @dev Transfers a `value` amount of tokens of type `id` from `from` to `to`.
     *
     * WARNING: This function can potentially allow a reentrancy attack when transferring tokens
     * to an untrusted contract, when invoking {IERC1155Receiver-onERC1155Received} on the receiver.
     * Ensure to follow the checks-effects-interactions pattern and consider employing
     * reentrancy guards when interacting with untrusted contracts.
     *
     * Emits a {TransferSingle} event.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - If the caller is not `from`, it must have been approved to spend ``from``'s tokens via {setApprovalForAll}.
     * - `from` must have a balance of tokens of type `id` of at least `value` amount.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
     * acceptance magic value.
     */
    function safeTransferFrom(address from, address to, uint256 id, uint256 value, bytes calldata data) external;

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
     *
     * WARNING: This function can potentially allow a reentrancy attack when transferring tokens
     * to an untrusted contract, when invoking {IERC1155Receiver-onERC1155BatchReceived} on the receiver.
     * Ensure to follow the checks-effects-interactions pattern and consider employing
     * reentrancy guards when interacting with untrusted contracts.
     *
     * Emits either a {TransferSingle} or a {TransferBatch} event, depending on the length of the array arguments.
     *
     * Requirements:
     *
     * - `ids` and `values` must have the same length.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
     * acceptance magic value.
     */
    function safeBatchTransferFrom(
        address from,
        address to,
        uint256[] calldata ids,
        uint256[] calldata values,
        bytes calldata data
    ) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC1155/IERC1155Receiver.sol)

pragma solidity >=0.6.2;

import {IERC165} from "../../utils/introspection/IERC165.sol";

/**
 * @dev Interface that must be implemented by smart contracts in order to receive
 * ERC-1155 token transfers.
 */
interface IERC1155Receiver is IERC165 {
    /**
     * @dev Handles the receipt of a single ERC-1155 token type. This function is
     * called at the end of a `safeTransferFrom` after the balance has been updated.
     *
     * NOTE: To accept the transfer, this must return
     * `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
     * (i.e. 0xf23a6e61, or its own function selector).
     *
     * @param operator The address which initiated the transfer (i.e. msg.sender)
     * @param from The address which previously owned the token
     * @param id The ID of the token being transferred
     * @param value The amount of tokens being transferred
     * @param data Additional data with no specified format
     * @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed
     */
    function onERC1155Received(
        address operator,
        address from,
        uint256 id,
        uint256 value,
        bytes calldata data
    ) external returns (bytes4);

    /**
     * @dev Handles the receipt of a multiple ERC-1155 token types. This function
     * is called at the end of a `safeBatchTransferFrom` after the balances have
     * been updated.
     *
     * NOTE: To accept the transfer(s), this must return
     * `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
     * (i.e. 0xbc197c81, or its own function selector).
     *
     * @param operator The address which initiated the batch transfer (i.e. msg.sender)
     * @param from The address which previously owned the token
     * @param ids An array containing ids of each token being transferred (order and length must match values array)
     * @param values An array containing amounts of each token being transferred (order and length must match ids array)
     * @param data Additional data with no specified format
     * @return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` if transfer is allowed
     */
    function onERC1155BatchReceived(
        address operator,
        address from,
        uint256[] calldata ids,
        uint256[] calldata values,
        bytes calldata data
    ) external returns (bytes4);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC20/ERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "./IERC20.sol";
import {IERC20Metadata} from "./extensions/IERC20Metadata.sol";
import {Context} from "../../utils/Context.sol";
import {IERC20Errors} from "../../interfaces/draft-IERC6093.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * The default value of {decimals} is 18. To change this, you should override
 * this function so it returns a different value.
 *
 * We have followed general OpenZeppelin Contracts guidelines: functions revert
 * instead returning `false` on failure. This behavior is nonetheless
 * conventional and does not conflict with the expectations of ERC-20
 * applications.
 */
abstract contract ERC20 is Context, IERC20, IERC20Metadata, IERC20Errors {
    mapping(address account => uint256) private _balances;

    mapping(address account => mapping(address spender => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * Both values are immutable: they can only be set once during construction.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5.05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the default value returned by this function, unless
     * it's overridden.
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual returns (uint8) {
        return 18;
    }

    /// @inheritdoc IERC20
    function totalSupply() public view virtual returns (uint256) {
        return _totalSupply;
    }

    /// @inheritdoc IERC20
    function balanceOf(address account) public view virtual returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - the caller must have a balance of at least `value`.
     */
    function transfer(address to, uint256 value) public virtual returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, value);
        return true;
    }

    /// @inheritdoc IERC20
    function allowance(address owner, address spender) public view virtual returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * NOTE: If `value` is the maximum `uint256`, the allowance is not updated on
     * `transferFrom`. This is semantically equivalent to an infinite approval.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 value) public virtual returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, value);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Skips emitting an {Approval} event indicating an allowance update. This is not
     * required by the ERC. See {xref-ERC20-_approve-address-address-uint256-bool-}[_approve].
     *
     * NOTE: Does not update the allowance if the current allowance
     * is the maximum `uint256`.
     *
     * Requirements:
     *
     * - `from` and `to` cannot be the zero address.
     * - `from` must have a balance of at least `value`.
     * - the caller must have allowance for ``from``'s tokens of at least
     * `value`.
     */
    function transferFrom(address from, address to, uint256 value) public virtual returns (bool) {
        address spender = _msgSender();
        _spendAllowance(from, spender, value);
        _transfer(from, to, value);
        return true;
    }

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to`.
     *
     * This internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * NOTE: This function is not virtual, {_update} should be overridden instead.
     */
    function _transfer(address from, address to, uint256 value) internal {
        if (from == address(0)) {
            revert ERC20InvalidSender(address(0));
        }
        if (to == address(0)) {
            revert ERC20InvalidReceiver(address(0));
        }
        _update(from, to, value);
    }

    /**
     * @dev Transfers a `value` amount of tokens from `from` to `to`, or alternatively mints (or burns) if `from`
     * (or `to`) is the zero address. All customizations to transfers, mints, and burns should be done by overriding
     * this function.
     *
     * Emits a {Transfer} event.
     */
    function _update(address from, address to, uint256 value) internal virtual {
        if (from == address(0)) {
            // Overflow check required: The rest of the code assumes that totalSupply never overflows
            _totalSupply += value;
        } else {
            uint256 fromBalance = _balances[from];
            if (fromBalance < value) {
                revert ERC20InsufficientBalance(from, fromBalance, value);
            }
            unchecked {
                // Overflow not possible: value <= fromBalance <= totalSupply.
                _balances[from] = fromBalance - value;
            }
        }

        if (to == address(0)) {
            unchecked {
                // Overflow not possible: value <= totalSupply or value <= fromBalance <= totalSupply.
                _totalSupply -= value;
            }
        } else {
            unchecked {
                // Overflow not possible: balance + value is at most totalSupply, which we know fits into a uint256.
                _balances[to] += value;
            }
        }

        emit Transfer(from, to, value);
    }

    /**
     * @dev Creates a `value` amount of tokens and assigns them to `account`, by transferring it from address(0).
     * Relies on the `_update` mechanism
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * NOTE: This function is not virtual, {_update} should be overridden instead.
     */
    function _mint(address account, uint256 value) internal {
        if (account == address(0)) {
            revert ERC20InvalidReceiver(address(0));
        }
        _update(address(0), account, value);
    }

    /**
     * @dev Destroys a `value` amount of tokens from `account`, lowering the total supply.
     * Relies on the `_update` mechanism.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * NOTE: This function is not virtual, {_update} should be overridden instead
     */
    function _burn(address account, uint256 value) internal {
        if (account == address(0)) {
            revert ERC20InvalidSender(address(0));
        }
        _update(account, address(0), value);
    }

    /**
     * @dev Sets `value` as the allowance of `spender` over the `owner`'s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     *
     * Overrides to this logic should be done to the variant with an additional `bool emitEvent` argument.
     */
    function _approve(address owner, address spender, uint256 value) internal {
        _approve(owner, spender, value, true);
    }

    /**
     * @dev Variant of {_approve} with an optional flag to enable or disable the {Approval} event.
     *
     * By default (when calling {_approve}) the flag is set to true. On the other hand, approval changes made by
     * `_spendAllowance` during the `transferFrom` operation set the flag to false. This saves gas by not emitting any
     * `Approval` event during `transferFrom` operations.
     *
     * Anyone who wishes to continue emitting `Approval` events on the`transferFrom` operation can force the flag to
     * true using the following override:
     *
     * ```solidity
     * function _approve(address owner, address spender, uint256 value, bool) internal virtual override {
     *     super._approve(owner, spender, value, true);
     * }
     * ```
     *
     * Requirements are the same as {_approve}.
     */
    function _approve(address owner, address spender, uint256 value, bool emitEvent) internal virtual {
        if (owner == address(0)) {
            revert ERC20InvalidApprover(address(0));
        }
        if (spender == address(0)) {
            revert ERC20InvalidSpender(address(0));
        }
        _allowances[owner][spender] = value;
        if (emitEvent) {
            emit Approval(owner, spender, value);
        }
    }

    /**
     * @dev Updates `owner`'s allowance for `spender` based on spent `value`.
     *
     * Does not update the allowance value in case of infinite allowance.
     * Revert if not enough allowance is available.
     *
     * Does not emit an {Approval} event.
     */
    function _spendAllowance(address owner, address spender, uint256 value) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance < type(uint256).max) {
            if (currentAllowance < value) {
                revert ERC20InsufficientAllowance(spender, currentAllowance, value);
            }
            unchecked {
                _approve(owner, spender, currentAllowance - value, false);
            }
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity >=0.6.2;

import {IERC20} from "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC-20 standard.
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC20/IERC20.sol)

pragma solidity >=0.4.16;

/**
 * @dev Interface of the ERC-20 standard as defined in the ERC.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the value of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the value of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 value) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the
     * allowance mechanism. `value` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 value) external returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.3.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../IERC20.sol";
import {IERC1363} from "../../../interfaces/IERC1363.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC-20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    /**
     * @dev An operation with an ERC-20 token failed.
     */
    error SafeERC20FailedOperation(address token);

    /**
     * @dev Indicates a failed `decreaseAllowance` request.
     */
    error SafeERC20FailedDecreaseAllowance(address spender, uint256 currentAllowance, uint256 requestedDecrease);

    /**
     * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeCall(token.transfer, (to, value)));
    }

    /**
     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
     */
    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeCall(token.transferFrom, (from, to, value)));
    }

    /**
     * @dev Variant of {safeTransfer} that returns a bool instead of reverting if the operation is not successful.
     */
    function trySafeTransfer(IERC20 token, address to, uint256 value) internal returns (bool) {
        return _callOptionalReturnBool(token, abi.encodeCall(token.transfer, (to, value)));
    }

    /**
     * @dev Variant of {safeTransferFrom} that returns a bool instead of reverting if the operation is not successful.
     */
    function trySafeTransferFrom(IERC20 token, address from, address to, uint256 value) internal returns (bool) {
        return _callOptionalReturnBool(token, abi.encodeCall(token.transferFrom, (from, to, value)));
    }

    /**
     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     *
     * IMPORTANT: If the token implements ERC-7674 (ERC-20 with temporary allowance), and if the "client"
     * smart contract uses ERC-7674 to set temporary allowances, then the "client" smart contract should avoid using
     * this function. Performing a {safeIncreaseAllowance} or {safeDecreaseAllowance} operation on a token contract
     * that has a non-zero temporary allowance (for that particular owner-spender) will result in unexpected behavior.
     */
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        forceApprove(token, spender, oldAllowance + value);
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `requestedDecrease`. If `token` returns no
     * value, non-reverting calls are assumed to be successful.
     *
     * IMPORTANT: If the token implements ERC-7674 (ERC-20 with temporary allowance), and if the "client"
     * smart contract uses ERC-7674 to set temporary allowances, then the "client" smart contract should avoid using
     * this function. Performing a {safeIncreaseAllowance} or {safeDecreaseAllowance} operation on a token contract
     * that has a non-zero temporary allowance (for that particular owner-spender) will result in unexpected behavior.
     */
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 requestedDecrease) internal {
        unchecked {
            uint256 currentAllowance = token.allowance(address(this), spender);
            if (currentAllowance < requestedDecrease) {
                revert SafeERC20FailedDecreaseAllowance(spender, currentAllowance, requestedDecrease);
            }
            forceApprove(token, spender, currentAllowance - requestedDecrease);
        }
    }

    /**
     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
     * to be set to zero before setting it to a non-zero value, such as USDT.
     *
     * NOTE: If the token implements ERC-7674, this function will not modify any temporary allowance. This function
     * only sets the "standard" allowance. Any temporary allowance will remain active, in addition to the value being
     * set here.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeCall(token.approve, (spender, value));

        if (!_callOptionalReturnBool(token, approvalCall)) {
            _callOptionalReturn(token, abi.encodeCall(token.approve, (spender, 0)));
            _callOptionalReturn(token, approvalCall);
        }
    }

    /**
     * @dev Performs an {ERC1363} transferAndCall, with a fallback to the simple {ERC20} transfer if the target has no
     * code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
     * targeting contracts.
     *
     * Reverts if the returned value is other than `true`.
     */
    function transferAndCallRelaxed(IERC1363 token, address to, uint256 value, bytes memory data) internal {
        if (to.code.length == 0) {
            safeTransfer(token, to, value);
        } else if (!token.transferAndCall(to, value, data)) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Performs an {ERC1363} transferFromAndCall, with a fallback to the simple {ERC20} transferFrom if the target
     * has no code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
     * targeting contracts.
     *
     * Reverts if the returned value is other than `true`.
     */
    function transferFromAndCallRelaxed(
        IERC1363 token,
        address from,
        address to,
        uint256 value,
        bytes memory data
    ) internal {
        if (to.code.length == 0) {
            safeTransferFrom(token, from, to, value);
        } else if (!token.transferFromAndCall(from, to, value, data)) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Performs an {ERC1363} approveAndCall, with a fallback to the simple {ERC20} approve if the target has no
     * code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
     * targeting contracts.
     *
     * NOTE: When the recipient address (`to`) has no code (i.e. is an EOA), this function behaves as {forceApprove}.
     * Opposedly, when the recipient address (`to`) has code, this function only attempts to call {ERC1363-approveAndCall}
     * once without retrying, and relies on the returned value to be true.
     *
     * Reverts if the returned value is other than `true`.
     */
    function approveAndCallRelaxed(IERC1363 token, address to, uint256 value, bytes memory data) internal {
        if (to.code.length == 0) {
            forceApprove(token, to, value);
        } else if (!token.approveAndCall(to, value, data)) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     *
     * This is a variant of {_callOptionalReturnBool} that reverts if call fails to meet the requirements.
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        uint256 returnSize;
        uint256 returnValue;
        assembly ("memory-safe") {
            let success := call(gas(), token, 0, add(data, 0x20), mload(data), 0, 0x20)
            // bubble errors
            if iszero(success) {
                let ptr := mload(0x40)
                returndatacopy(ptr, 0, returndatasize())
                revert(ptr, returndatasize())
            }
            returnSize := returndatasize()
            returnValue := mload(0)
        }

        if (returnSize == 0 ? address(token).code.length == 0 : returnValue != 1) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     *
     * This is a variant of {_callOptionalReturn} that silently catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        bool success;
        uint256 returnSize;
        uint256 returnValue;
        assembly ("memory-safe") {
            success := call(gas(), token, 0, add(data, 0x20), mload(data), 0, 0x20)
            returnSize := returndatasize()
            returnValue := mload(0)
        }
        return success && (returnSize == 0 ? address(token).code.length > 0 : returnValue == 1);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC721/ERC721.sol)

pragma solidity ^0.8.20;

import {IERC721} from "./IERC721.sol";
import {IERC721Metadata} from "./extensions/IERC721Metadata.sol";
import {ERC721Utils} from "./utils/ERC721Utils.sol";
import {Context} from "../../utils/Context.sol";
import {Strings} from "../../utils/Strings.sol";
import {IERC165, ERC165} from "../../utils/introspection/ERC165.sol";
import {IERC721Errors} from "../../interfaces/draft-IERC6093.sol";

/**
 * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC-721] Non-Fungible Token Standard, including
 * the Metadata extension, but not including the Enumerable extension, which is available separately as
 * {ERC721Enumerable}.
 */
abstract contract ERC721 is Context, ERC165, IERC721, IERC721Metadata, IERC721Errors {
    using Strings for uint256;

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

    mapping(uint256 tokenId => address) private _owners;

    mapping(address owner => uint256) private _balances;

    mapping(uint256 tokenId => address) private _tokenApprovals;

    mapping(address owner => mapping(address operator => bool)) private _operatorApprovals;

    /**
     * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /// @inheritdoc IERC165
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
        return
            interfaceId == type(IERC721).interfaceId ||
            interfaceId == type(IERC721Metadata).interfaceId ||
            super.supportsInterface(interfaceId);
    }

    /// @inheritdoc IERC721
    function balanceOf(address owner) public view virtual returns (uint256) {
        if (owner == address(0)) {
            revert ERC721InvalidOwner(address(0));
        }
        return _balances[owner];
    }

    /// @inheritdoc IERC721
    function ownerOf(uint256 tokenId) public view virtual returns (address) {
        return _requireOwned(tokenId);
    }

    /// @inheritdoc IERC721Metadata
    function name() public view virtual returns (string memory) {
        return _name;
    }

    /// @inheritdoc IERC721Metadata
    function symbol() public view virtual returns (string memory) {
        return _symbol;
    }

    /// @inheritdoc IERC721Metadata
    function tokenURI(uint256 tokenId) public view virtual returns (string memory) {
        _requireOwned(tokenId);

        string memory baseURI = _baseURI();
        return bytes(baseURI).length > 0 ? string.concat(baseURI, tokenId.toString()) : "";
    }

    /**
     * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
     * token will be the concatenation of the `baseURI` and the `tokenId`. Empty
     * by default, can be overridden in child contracts.
     */
    function _baseURI() internal view virtual returns (string memory) {
        return "";
    }

    /// @inheritdoc IERC721
    function approve(address to, uint256 tokenId) public virtual {
        _approve(to, tokenId, _msgSender());
    }

    /// @inheritdoc IERC721
    function getApproved(uint256 tokenId) public view virtual returns (address) {
        _requireOwned(tokenId);

        return _getApproved(tokenId);
    }

    /// @inheritdoc IERC721
    function setApprovalForAll(address operator, bool approved) public virtual {
        _setApprovalForAll(_msgSender(), operator, approved);
    }

    /// @inheritdoc IERC721
    function isApprovedForAll(address owner, address operator) public view virtual returns (bool) {
        return _operatorApprovals[owner][operator];
    }

    /// @inheritdoc IERC721
    function transferFrom(address from, address to, uint256 tokenId) public virtual {
        if (to == address(0)) {
            revert ERC721InvalidReceiver(address(0));
        }
        // Setting an "auth" arguments enables the `_isAuthorized` check which verifies that the token exists
        // (from != 0). Therefore, it is not needed to verify that the return value is not 0 here.
        address previousOwner = _update(to, tokenId, _msgSender());
        if (previousOwner != from) {
            revert ERC721IncorrectOwner(from, tokenId, previousOwner);
        }
    }

    /// @inheritdoc IERC721
    function safeTransferFrom(address from, address to, uint256 tokenId) public {
        safeTransferFrom(from, to, tokenId, "");
    }

    /// @inheritdoc IERC721
    function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory data) public virtual {
        transferFrom(from, to, tokenId);
        ERC721Utils.checkOnERC721Received(_msgSender(), from, to, tokenId, data);
    }

    /**
     * @dev Returns the owner of the `tokenId`. Does NOT revert if token doesn't exist
     *
     * IMPORTANT: Any overrides to this function that add ownership of tokens not tracked by the
     * core ERC-721 logic MUST be matched with the use of {_increaseBalance} to keep balances
     * consistent with ownership. The invariant to preserve is that for any address `a` the value returned by
     * `balanceOf(a)` must be equal to the number of tokens such that `_ownerOf(tokenId)` is `a`.
     */
    function _ownerOf(uint256 tokenId) internal view virtual returns (address) {
        return _owners[tokenId];
    }

    /**
     * @dev Returns the approved address for `tokenId`. Returns 0 if `tokenId` is not minted.
     */
    function _getApproved(uint256 tokenId) internal view virtual returns (address) {
        return _tokenApprovals[tokenId];
    }

    /**
     * @dev Returns whether `spender` is allowed to manage `owner`'s tokens, or `tokenId` in
     * particular (ignoring whether it is owned by `owner`).
     *
     * WARNING: This function assumes that `owner` is the actual owner of `tokenId` and does not verify this
     * assumption.
     */
    function _isAuthorized(address owner, address spender, uint256 tokenId) internal view virtual returns (bool) {
        return
            spender != address(0) &&
            (owner == spender || isApprovedForAll(owner, spender) || _getApproved(tokenId) == spender);
    }

    /**
     * @dev Checks if `spender` can operate on `tokenId`, assuming the provided `owner` is the actual owner.
     * Reverts if:
     * - `spender` does not have approval from `owner` for `tokenId`.
     * - `spender` does not have approval to manage all of `owner`'s assets.
     *
     * WARNING: This function assumes that `owner` is the actual owner of `tokenId` and does not verify this
     * assumption.
     */
    function _checkAuthorized(address owner, address spender, uint256 tokenId) internal view virtual {
        if (!_isAuthorized(owner, spender, tokenId)) {
            if (owner == address(0)) {
                revert ERC721NonexistentToken(tokenId);
            } else {
                revert ERC721InsufficientApproval(spender, tokenId);
            }
        }
    }

    /**
     * @dev Unsafe write access to the balances, used by extensions that "mint" tokens using an {ownerOf} override.
     *
     * NOTE: the value is limited to type(uint128).max. This protect against _balance overflow. It is unrealistic that
     * a uint256 would ever overflow from increments when these increments are bounded to uint128 values.
     *
     * WARNING: Increasing an account's balance using this function tends to be paired with an override of the
     * {_ownerOf} function to resolve the ownership of the corresponding tokens so that balances and ownership
     * remain consistent with one another.
     */
    function _increaseBalance(address account, uint128 value) internal virtual {
        unchecked {
            _balances[account] += value;
        }
    }

    /**
     * @dev Transfers `tokenId` from its current owner to `to`, or alternatively mints (or burns) if the current owner
     * (or `to`) is the zero address. Returns the owner of the `tokenId` before the update.
     *
     * The `auth` argument is optional. If the value passed is non 0, then this function will check that
     * `auth` is either the owner of the token, or approved to operate on the token (by the owner).
     *
     * Emits a {Transfer} event.
     *
     * NOTE: If overriding this function in a way that tracks balances, see also {_increaseBalance}.
     */
    function _update(address to, uint256 tokenId, address auth) internal virtual returns (address) {
        address from = _ownerOf(tokenId);

        // Perform (optional) operator check
        if (auth != address(0)) {
            _checkAuthorized(from, auth, tokenId);
        }

        // Execute the update
        if (from != address(0)) {
            // Clear approval. No need to re-authorize or emit the Approval event
            _approve(address(0), tokenId, address(0), false);

            unchecked {
                _balances[from] -= 1;
            }
        }

        if (to != address(0)) {
            unchecked {
                _balances[to] += 1;
            }
        }

        _owners[tokenId] = to;

        emit Transfer(from, to, tokenId);

        return from;
    }

    /**
     * @dev Mints `tokenId` and transfers it to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
     *
     * Requirements:
     *
     * - `tokenId` must not exist.
     * - `to` cannot be the zero address.
     *
     * Emits a {Transfer} event.
     */
    function _mint(address to, uint256 tokenId) internal {
        if (to == address(0)) {
            revert ERC721InvalidReceiver(address(0));
        }
        address previousOwner = _update(to, tokenId, address(0));
        if (previousOwner != address(0)) {
            revert ERC721InvalidSender(address(0));
        }
    }

    /**
     * @dev Mints `tokenId`, transfers it to `to` and checks for `to` acceptance.
     *
     * Requirements:
     *
     * - `tokenId` must not exist.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function _safeMint(address to, uint256 tokenId) internal {
        _safeMint(to, tokenId, "");
    }

    /**
     * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
     * forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
     */
    function _safeMint(address to, uint256 tokenId, bytes memory data) internal virtual {
        _mint(to, tokenId);
        ERC721Utils.checkOnERC721Received(_msgSender(), address(0), to, tokenId, data);
    }

    /**
     * @dev Destroys `tokenId`.
     * The approval is cleared when the token is burned.
     * This is an internal function that does not check if the sender is authorized to operate on the token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     *
     * Emits a {Transfer} event.
     */
    function _burn(uint256 tokenId) internal {
        address previousOwner = _update(address(0), tokenId, address(0));
        if (previousOwner == address(0)) {
            revert ERC721NonexistentToken(tokenId);
        }
    }

    /**
     * @dev Transfers `tokenId` from `from` to `to`.
     *  As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     *
     * Emits a {Transfer} event.
     */
    function _transfer(address from, address to, uint256 tokenId) internal {
        if (to == address(0)) {
            revert ERC721InvalidReceiver(address(0));
        }
        address previousOwner = _update(to, tokenId, address(0));
        if (previousOwner == address(0)) {
            revert ERC721NonexistentToken(tokenId);
        } else if (previousOwner != from) {
            revert ERC721IncorrectOwner(from, tokenId, previousOwner);
        }
    }

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking that contract recipients
     * are aware of the ERC-721 standard to prevent tokens from being forever locked.
     *
     * `data` is additional data, it has no specified format and it is sent in call to `to`.
     *
     * This internal function is like {safeTransferFrom} in the sense that it invokes
     * {IERC721Receiver-onERC721Received} on the receiver, and can be used to e.g.
     * implement alternative mechanisms to perform token transfer, such as signature-based.
     *
     * Requirements:
     *
     * - `tokenId` token must exist and be owned by `from`.
     * - `to` cannot be the zero address.
     * - `from` cannot be the zero address.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function _safeTransfer(address from, address to, uint256 tokenId) internal {
        _safeTransfer(from, to, tokenId, "");
    }

    /**
     * @dev Same as {xref-ERC721-_safeTransfer-address-address-uint256-}[`_safeTransfer`], with an additional `data` parameter which is
     * forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
     */
    function _safeTransfer(address from, address to, uint256 tokenId, bytes memory data) internal virtual {
        _transfer(from, to, tokenId);
        ERC721Utils.checkOnERC721Received(_msgSender(), from, to, tokenId, data);
    }

    /**
     * @dev Approve `to` to operate on `tokenId`
     *
     * The `auth` argument is optional. If the value passed is non 0, then this function will check that `auth` is
     * either the owner of the token, or approved to operate on all tokens held by this owner.
     *
     * Emits an {Approval} event.
     *
     * Overrides to this logic should be done to the variant with an additional `bool emitEvent` argument.
     */
    function _approve(address to, uint256 tokenId, address auth) internal {
        _approve(to, tokenId, auth, true);
    }

    /**
     * @dev Variant of `_approve` with an optional flag to enable or disable the {Approval} event. The event is not
     * emitted in the context of transfers.
     */
    function _approve(address to, uint256 tokenId, address auth, bool emitEvent) internal virtual {
        // Avoid reading the owner unless necessary
        if (emitEvent || auth != address(0)) {
            address owner = _requireOwned(tokenId);

            // We do not use _isAuthorized because single-token approvals should not be able to call approve
            if (auth != address(0) && owner != auth && !isApprovedForAll(owner, auth)) {
                revert ERC721InvalidApprover(auth);
            }

            if (emitEvent) {
                emit Approval(owner, to, tokenId);
            }
        }

        _tokenApprovals[tokenId] = to;
    }

    /**
     * @dev Approve `operator` to operate on all of `owner` tokens
     *
     * Requirements:
     * - operator can't be the address zero.
     *
     * Emits an {ApprovalForAll} event.
     */
    function _setApprovalForAll(address owner, address operator, bool approved) internal virtual {
        if (operator == address(0)) {
            revert ERC721InvalidOperator(operator);
        }
        _operatorApprovals[owner][operator] = approved;
        emit ApprovalForAll(owner, operator, approved);
    }

    /**
     * @dev Reverts if the `tokenId` doesn't have a current owner (it hasn't been minted, or it has been burned).
     * Returns the owner.
     *
     * Overrides to ownership logic should be done to {_ownerOf}.
     */
    function _requireOwned(uint256 tokenId) internal view returns (address) {
        address owner = _ownerOf(tokenId);
        if (owner == address(0)) {
            revert ERC721NonexistentToken(tokenId);
        }
        return owner;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC721/extensions/IERC721Metadata.sol)

pragma solidity >=0.6.2;

import {IERC721} from "../IERC721.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional metadata extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Metadata is IERC721 {
    /**
     * @dev Returns the token collection name.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the token collection symbol.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
     */
    function tokenURI(uint256 tokenId) external view returns (string memory);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC721/IERC721.sol)

pragma solidity >=0.6.2;

import {IERC165} from "../../utils/introspection/IERC165.sol";

/**
 * @dev Required interface of an ERC-721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon
     *   a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC-721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must have been allowed to move this token by either {approve} or
     *   {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon
     *   a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC-721
     * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must
     * understand this adds an external call which potentially creates a reentrancy vulnerability.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 tokenId) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the address zero.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool approved) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC721/IERC721Receiver.sol)

pragma solidity >=0.5.0;

/**
 * @title ERC-721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC-721 asset contracts.
 */
interface IERC721Receiver {
    /**
     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
     * by `operator` from `from`, this function is called.
     *
     * It must return its Solidity selector to confirm the token transfer.
     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be
     * reverted.
     *
     * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC721/utils/ERC721Utils.sol)

pragma solidity ^0.8.20;

import {IERC721Receiver} from "../IERC721Receiver.sol";
import {IERC721Errors} from "../../../interfaces/draft-IERC6093.sol";

/**
 * @dev Library that provide common ERC-721 utility functions.
 *
 * See https://eips.ethereum.org/EIPS/eip-721[ERC-721].
 *
 * _Available since v5.1._
 */
library ERC721Utils {
    /**
     * @dev Performs an acceptance check for the provided `operator` by calling {IERC721Receiver-onERC721Received}
     * on the `to` address. The `operator` is generally the address that initiated the token transfer (i.e. `msg.sender`).
     *
     * The acceptance call is not executed and treated as a no-op if the target address doesn't contain code (i.e. an EOA).
     * Otherwise, the recipient must implement {IERC721Receiver-onERC721Received} and return the acceptance magic value to accept
     * the transfer.
     */
    function checkOnERC721Received(
        address operator,
        address from,
        address to,
        uint256 tokenId,
        bytes memory data
    ) internal {
        if (to.code.length > 0) {
            try IERC721Receiver(to).onERC721Received(operator, from, tokenId, data) returns (bytes4 retval) {
                if (retval != IERC721Receiver.onERC721Received.selector) {
                    // Token rejected
                    revert IERC721Errors.ERC721InvalidReceiver(to);
                }
            } catch (bytes memory reason) {
                if (reason.length == 0) {
                    // non-IERC721Receiver implementer
                    revert IERC721Errors.ERC721InvalidReceiver(to);
                } else {
                    assembly ("memory-safe") {
                        revert(add(reason, 0x20), mload(reason))
                    }
                }
            }
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (utils/Address.sol)

pragma solidity ^0.8.20;

import {Errors} from "./Errors.sol";

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev There's no code at `target` (it is not a contract).
     */
    error AddressEmptyCode(address target);

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.20/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        if (address(this).balance < amount) {
            revert Errors.InsufficientBalance(address(this).balance, amount);
        }

        (bool success, bytes memory returndata) = recipient.call{value: amount}("");
        if (!success) {
            _revert(returndata);
        }
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason or custom error, it is bubbled
     * up by this function (like regular Solidity function calls). However, if
     * the call reverted with no returned reason, this function reverts with a
     * {Errors.FailedCall} error.
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        if (address(this).balance < value) {
            revert Errors.InsufficientBalance(address(this).balance, value);
        }
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and reverts if the target
     * was not a contract or bubbling up the revert reason (falling back to {Errors.FailedCall}) in case
     * of an unsuccessful call.
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata
    ) internal view returns (bytes memory) {
        if (!success) {
            _revert(returndata);
        } else {
            // only check if target is a contract if the call was successful and the return data is empty
            // otherwise we already know that it was a contract
            if (returndata.length == 0 && target.code.length == 0) {
                revert AddressEmptyCode(target);
            }
            return returndata;
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and reverts if it wasn't, either by bubbling the
     * revert reason or with a default {Errors.FailedCall} error.
     */
    function verifyCallResult(bool success, bytes memory returndata) internal pure returns (bytes memory) {
        if (!success) {
            _revert(returndata);
        } else {
            return returndata;
        }
    }

    /**
     * @dev Reverts with returndata if present. Otherwise reverts with {Errors.FailedCall}.
     */
    function _revert(bytes memory returndata) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            assembly ("memory-safe") {
                revert(add(returndata, 0x20), mload(returndata))
            }
        } else {
            revert Errors.FailedCall();
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)

pragma solidity ^0.8.20;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/cryptography/ECDSA.sol)

pragma solidity ^0.8.20;

/**
 * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
 *
 * These functions can be used to verify that a message was signed by the holder
 * of the private keys of a given address.
 */
library ECDSA {
    enum RecoverError {
        NoError,
        InvalidSignature,
        InvalidSignatureLength,
        InvalidSignatureS
    }

    /**
     * @dev The signature derives the `address(0)`.
     */
    error ECDSAInvalidSignature();

    /**
     * @dev The signature has an invalid length.
     */
    error ECDSAInvalidSignatureLength(uint256 length);

    /**
     * @dev The signature has an S value that is in the upper half order.
     */
    error ECDSAInvalidSignatureS(bytes32 s);

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with `signature` or an error. This will not
     * return address(0) without also returning an error description. Errors are documented using an enum (error type)
     * and a bytes32 providing additional information about the error.
     *
     * If no error is returned, then the address can be used for verification purposes.
     *
     * The `ecrecover` EVM precompile allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {MessageHashUtils-toEthSignedMessageHash} on it.
     *
     * Documentation for signature generation:
     * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
     * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
     */
    function tryRecover(
        bytes32 hash,
        bytes memory signature
    ) internal pure returns (address recovered, RecoverError err, bytes32 errArg) {
        if (signature.length == 65) {
            bytes32 r;
            bytes32 s;
            uint8 v;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            assembly ("memory-safe") {
                r := mload(add(signature, 0x20))
                s := mload(add(signature, 0x40))
                v := byte(0, mload(add(signature, 0x60)))
            }
            return tryRecover(hash, v, r, s);
        } else {
            return (address(0), RecoverError.InvalidSignatureLength, bytes32(signature.length));
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature`. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM precompile allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {MessageHashUtils-toEthSignedMessageHash} on it.
     */
    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
        (address recovered, RecoverError error, bytes32 errorArg) = tryRecover(hash, signature);
        _throwError(error, errorArg);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
     *
     * See https://eips.ethereum.org/EIPS/eip-2098[ERC-2098 short signatures]
     */
    function tryRecover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address recovered, RecoverError err, bytes32 errArg) {
        unchecked {
            bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
            // We do not check for an overflow here since the shift operation results in 0 or 1.
            uint8 v = uint8((uint256(vs) >> 255) + 27);
            return tryRecover(hash, v, r, s);
        }
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
     */
    function recover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address) {
        (address recovered, RecoverError error, bytes32 errorArg) = tryRecover(hash, r, vs);
        _throwError(error, errorArg);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `v`,
     * `r` and `s` signature fields separately.
     */
    function tryRecover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address recovered, RecoverError err, bytes32 errArg) {
        // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
        // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
        // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
        // signatures from current libraries generate a unique signature with an s-value in the lower half order.
        //
        // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
        // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
        // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
        // these malleable signatures as well.
        if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
            return (address(0), RecoverError.InvalidSignatureS, s);
        }

        // If the signature is valid (and not malleable), return the signer address
        address signer = ecrecover(hash, v, r, s);
        if (signer == address(0)) {
            return (address(0), RecoverError.InvalidSignature, bytes32(0));
        }

        return (signer, RecoverError.NoError, bytes32(0));
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `v`,
     * `r` and `s` signature fields separately.
     */
    function recover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address) {
        (address recovered, RecoverError error, bytes32 errorArg) = tryRecover(hash, v, r, s);
        _throwError(error, errorArg);
        return recovered;
    }

    /**
     * @dev Optionally reverts with the corresponding custom error according to the `error` argument provided.
     */
    function _throwError(RecoverError error, bytes32 errorArg) private pure {
        if (error == RecoverError.NoError) {
            return; // no error: do nothing
        } else if (error == RecoverError.InvalidSignature) {
            revert ECDSAInvalidSignature();
        } else if (error == RecoverError.InvalidSignatureLength) {
            revert ECDSAInvalidSignatureLength(uint256(errorArg));
        } else if (error == RecoverError.InvalidSignatureS) {
            revert ECDSAInvalidSignatureS(errorArg);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (utils/cryptography/EIP712.sol)

pragma solidity ^0.8.20;

import {MessageHashUtils} from "./MessageHashUtils.sol";
import {ShortStrings, ShortString} from "../ShortStrings.sol";
import {IERC5267} from "../../interfaces/IERC5267.sol";

/**
 * @dev https://eips.ethereum.org/EIPS/eip-712[EIP-712] is a standard for hashing and signing of typed structured data.
 *
 * The encoding scheme specified in the EIP requires a domain separator and a hash of the typed structured data, whose
 * encoding is very generic and therefore its implementation in Solidity is not feasible, thus this contract
 * does not implement the encoding itself. Protocols need to implement the type-specific encoding they need in order to
 * produce the hash of their typed data using a combination of `abi.encode` and `keccak256`.
 *
 * This contract implements the EIP-712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding
 * scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA
 * ({_hashTypedDataV4}).
 *
 * The implementation of the domain separator was designed to be as efficient as possible while still properly updating
 * the chain id to protect against replay attacks on an eventual fork of the chain.
 *
 * NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method
 * https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask].
 *
 * NOTE: In the upgradeable version of this contract, the cached values will correspond to the address, and the domain
 * separator of the implementation contract. This will cause the {_domainSeparatorV4} function to always rebuild the
 * separator from the immutable values, which is cheaper than accessing a cached version in cold storage.
 *
 * @custom:oz-upgrades-unsafe-allow state-variable-immutable
 */
abstract contract EIP712 is IERC5267 {
    using ShortStrings for *;

    bytes32 private constant TYPE_HASH =
        keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)");

    // Cache the domain separator as an immutable value, but also store the chain id that it corresponds to, in order to
    // invalidate the cached domain separator if the chain id changes.
    bytes32 private immutable _cachedDomainSeparator;
    uint256 private immutable _cachedChainId;
    address private immutable _cachedThis;

    bytes32 private immutable _hashedName;
    bytes32 private immutable _hashedVersion;

    ShortString private immutable _name;
    ShortString private immutable _version;
    // slither-disable-next-line constable-states
    string private _nameFallback;
    // slither-disable-next-line constable-states
    string private _versionFallback;

    /**
     * @dev Initializes the domain separator and parameter caches.
     *
     * The meaning of `name` and `version` is specified in
     * https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP-712]:
     *
     * - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol.
     * - `version`: the current major version of the signing domain.
     *
     * NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart
     * contract upgrade].
     */
    constructor(string memory name, string memory version) {
        _name = name.toShortStringWithFallback(_nameFallback);
        _version = version.toShortStringWithFallback(_versionFallback);
        _hashedName = keccak256(bytes(name));
        _hashedVersion = keccak256(bytes(version));

        _cachedChainId = block.chainid;
        _cachedDomainSeparator = _buildDomainSeparator();
        _cachedThis = address(this);
    }

    /**
     * @dev Returns the domain separator for the current chain.
     */
    function _domainSeparatorV4() internal view returns (bytes32) {
        if (address(this) == _cachedThis && block.chainid == _cachedChainId) {
            return _cachedDomainSeparator;
        } else {
            return _buildDomainSeparator();
        }
    }

    function _buildDomainSeparator() private view returns (bytes32) {
        return keccak256(abi.encode(TYPE_HASH, _hashedName, _hashedVersion, block.chainid, address(this)));
    }

    /**
     * @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this
     * function returns the hash of the fully encoded EIP712 message for this domain.
     *
     * This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example:
     *
     * ```solidity
     * bytes32 digest = _hashTypedDataV4(keccak256(abi.encode(
     *     keccak256("Mail(address to,string contents)"),
     *     mailTo,
     *     keccak256(bytes(mailContents))
     * )));
     * address signer = ECDSA.recover(digest, signature);
     * ```
     */
    function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) {
        return MessageHashUtils.toTypedDataHash(_domainSeparatorV4(), structHash);
    }

    /// @inheritdoc IERC5267
    function eip712Domain()
        public
        view
        virtual
        returns (
            bytes1 fields,
            string memory name,
            string memory version,
            uint256 chainId,
            address verifyingContract,
            bytes32 salt,
            uint256[] memory extensions
        )
    {
        return (
            hex"0f", // 01111
            _EIP712Name(),
            _EIP712Version(),
            block.chainid,
            address(this),
            bytes32(0),
            new uint256[](0)
        );
    }

    /**
     * @dev The name parameter for the EIP712 domain.
     *
     * NOTE: By default this function reads _name which is an immutable value.
     * It only reads from storage if necessary (in case the value is too large to fit in a ShortString).
     */
    // solhint-disable-next-line func-name-mixedcase
    function _EIP712Name() internal view returns (string memory) {
        return _name.toStringWithFallback(_nameFallback);
    }

    /**
     * @dev The version parameter for the EIP712 domain.
     *
     * NOTE: By default this function reads _version which is an immutable value.
     * It only reads from storage if necessary (in case the value is too large to fit in a ShortString).
     */
    // solhint-disable-next-line func-name-mixedcase
    function _EIP712Version() internal view returns (string memory) {
        return _version.toStringWithFallback(_versionFallback);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.3.0) (utils/cryptography/MessageHashUtils.sol)

pragma solidity ^0.8.20;

import {Strings} from "../Strings.sol";

/**
 * @dev Signature message hash utilities for producing digests to be consumed by {ECDSA} recovery or signing.
 *
 * The library provides methods for generating a hash of a message that conforms to the
 * https://eips.ethereum.org/EIPS/eip-191[ERC-191] and https://eips.ethereum.org/EIPS/eip-712[EIP 712]
 * specifications.
 */
library MessageHashUtils {
    /**
     * @dev Returns the keccak256 digest of an ERC-191 signed data with version
     * `0x45` (`personal_sign` messages).
     *
     * The digest is calculated by prefixing a bytes32 `messageHash` with
     * `"\x19Ethereum Signed Message:\n32"` and hashing the result. It corresponds with the
     * hash signed when using the https://ethereum.org/en/developers/docs/apis/json-rpc/#eth_sign[`eth_sign`] JSON-RPC method.
     *
     * NOTE: The `messageHash` parameter is intended to be the result of hashing a raw message with
     * keccak256, although any bytes32 value can be safely used because the final digest will
     * be re-hashed.
     *
     * See {ECDSA-recover}.
     */
    function toEthSignedMessageHash(bytes32 messageHash) internal pure returns (bytes32 digest) {
        assembly ("memory-safe") {
            mstore(0x00, "\x19Ethereum Signed Message:\n32") // 32 is the bytes-length of messageHash
            mstore(0x1c, messageHash) // 0x1c (28) is the length of the prefix
            digest := keccak256(0x00, 0x3c) // 0x3c is the length of the prefix (0x1c) + messageHash (0x20)
        }
    }

    /**
     * @dev Returns the keccak256 digest of an ERC-191 signed data with version
     * `0x45` (`personal_sign` messages).
     *
     * The digest is calculated by prefixing an arbitrary `message` with
     * `"\x19Ethereum Signed Message:\n" + len(message)` and hashing the result. It corresponds with the
     * hash signed when using the https://ethereum.org/en/developers/docs/apis/json-rpc/#eth_sign[`eth_sign`] JSON-RPC method.
     *
     * See {ECDSA-recover}.
     */
    function toEthSignedMessageHash(bytes memory message) internal pure returns (bytes32) {
        return
            keccak256(bytes.concat("\x19Ethereum Signed Message:\n", bytes(Strings.toString(message.length)), message));
    }

    /**
     * @dev Returns the keccak256 digest of an ERC-191 signed data with version
     * `0x00` (data with intended validator).
     *
     * The digest is calculated by prefixing an arbitrary `data` with `"\x19\x00"` and the intended
     * `validator` address. Then hashing the result.
     *
     * See {ECDSA-recover}.
     */
    function toDataWithIntendedValidatorHash(address validator, bytes memory data) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked(hex"19_00", validator, data));
    }

    /**
     * @dev Variant of {toDataWithIntendedValidatorHash-address-bytes} optimized for cases where `data` is a bytes32.
     */
    function toDataWithIntendedValidatorHash(
        address validator,
        bytes32 messageHash
    ) internal pure returns (bytes32 digest) {
        assembly ("memory-safe") {
            mstore(0x00, hex"19_00")
            mstore(0x02, shl(96, validator))
            mstore(0x16, messageHash)
            digest := keccak256(0x00, 0x36)
        }
    }

    /**
     * @dev Returns the keccak256 digest of an EIP-712 typed data (ERC-191 version `0x01`).
     *
     * The digest is calculated from a `domainSeparator` and a `structHash`, by prefixing them with
     * `\x19\x01` and hashing the result. It corresponds to the hash signed by the
     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`] JSON-RPC method as part of EIP-712.
     *
     * See {ECDSA-recover}.
     */
    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32 digest) {
        assembly ("memory-safe") {
            let ptr := mload(0x40)
            mstore(ptr, hex"19_01")
            mstore(add(ptr, 0x02), domainSeparator)
            mstore(add(ptr, 0x22), structHash)
            digest := keccak256(ptr, 0x42)
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/Errors.sol)

pragma solidity ^0.8.20;

/**
 * @dev Collection of common custom errors used in multiple contracts
 *
 * IMPORTANT: Backwards compatibility is not guaranteed in future versions of the library.
 * It is recommended to avoid relying on the error API for critical functionality.
 *
 * _Available since v5.1._
 */
library Errors {
    /**
     * @dev The ETH balance of the account is not enough to perform the operation.
     */
    error InsufficientBalance(uint256 balance, uint256 needed);

    /**
     * @dev A call to an address target failed. The target may have reverted.
     */
    error FailedCall();

    /**
     * @dev The deployment failed.
     */
    error FailedDeployment();

    /**
     * @dev A necessary precompile is missing.
     */
    error MissingPrecompile(address);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (utils/introspection/ERC165.sol)

pragma solidity ^0.8.20;

import {IERC165} from "./IERC165.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC-165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 */
abstract contract ERC165 is IERC165 {
    /// @inheritdoc IERC165
    function supportsInterface(bytes4 interfaceId) public view virtual returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (utils/introspection/IERC165.sol)

pragma solidity >=0.4.16;

/**
 * @dev Interface of the ERC-165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[ERC].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[ERC section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.3.0) (utils/math/Math.sol)

pragma solidity ^0.8.20;

import {Panic} from "../Panic.sol";
import {SafeCast} from "./SafeCast.sol";

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    enum Rounding {
        Floor, // Toward negative infinity
        Ceil, // Toward positive infinity
        Trunc, // Toward zero
        Expand // Away from zero
    }

    /**
     * @dev Return the 512-bit addition of two uint256.
     *
     * The result is stored in two 256 variables such that sum = high * 2²⁵⁶ + low.
     */
    function add512(uint256 a, uint256 b) internal pure returns (uint256 high, uint256 low) {
        assembly ("memory-safe") {
            low := add(a, b)
            high := lt(low, a)
        }
    }

    /**
     * @dev Return the 512-bit multiplication of two uint256.
     *
     * The result is stored in two 256 variables such that product = high * 2²⁵⁶ + low.
     */
    function mul512(uint256 a, uint256 b) internal pure returns (uint256 high, uint256 low) {
        // 512-bit multiply [high low] = x * y. Compute the product mod 2²⁵⁶ and mod 2²⁵⁶ - 1, then use
        // the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
        // variables such that product = high * 2²⁵⁶ + low.
        assembly ("memory-safe") {
            let mm := mulmod(a, b, not(0))
            low := mul(a, b)
            high := sub(sub(mm, low), lt(mm, low))
        }
    }

    /**
     * @dev Returns the addition of two unsigned integers, with a success flag (no overflow).
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
        unchecked {
            uint256 c = a + b;
            success = c >= a;
            result = c * SafeCast.toUint(success);
        }
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, with a success flag (no overflow).
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
        unchecked {
            uint256 c = a - b;
            success = c <= a;
            result = c * SafeCast.toUint(success);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with a success flag (no overflow).
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
        unchecked {
            uint256 c = a * b;
            assembly ("memory-safe") {
                // Only true when the multiplication doesn't overflow
                // (c / a == b) || (a == 0)
                success := or(eq(div(c, a), b), iszero(a))
            }
            // equivalent to: success ? c : 0
            result = c * SafeCast.toUint(success);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a success flag (no division by zero).
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
        unchecked {
            success = b > 0;
            assembly ("memory-safe") {
                // The `DIV` opcode returns zero when the denominator is 0.
                result := div(a, b)
            }
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a success flag (no division by zero).
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool success, uint256 result) {
        unchecked {
            success = b > 0;
            assembly ("memory-safe") {
                // The `MOD` opcode returns zero when the denominator is 0.
                result := mod(a, b)
            }
        }
    }

    /**
     * @dev Unsigned saturating addition, bounds to `2²⁵⁶ - 1` instead of overflowing.
     */
    function saturatingAdd(uint256 a, uint256 b) internal pure returns (uint256) {
        (bool success, uint256 result) = tryAdd(a, b);
        return ternary(success, result, type(uint256).max);
    }

    /**
     * @dev Unsigned saturating subtraction, bounds to zero instead of overflowing.
     */
    function saturatingSub(uint256 a, uint256 b) internal pure returns (uint256) {
        (, uint256 result) = trySub(a, b);
        return result;
    }

    /**
     * @dev Unsigned saturating multiplication, bounds to `2²⁵⁶ - 1` instead of overflowing.
     */
    function saturatingMul(uint256 a, uint256 b) internal pure returns (uint256) {
        (bool success, uint256 result) = tryMul(a, b);
        return ternary(success, result, type(uint256).max);
    }

    /**
     * @dev Branchless ternary evaluation for `a ? b : c`. Gas costs are constant.
     *
     * IMPORTANT: This function may reduce bytecode size and consume less gas when used standalone.
     * However, the compiler may optimize Solidity ternary operations (i.e. `a ? b : c`) to only compute
     * one branch when needed, making this function more expensive.
     */
    function ternary(bool condition, uint256 a, uint256 b) internal pure returns (uint256) {
        unchecked {
            // branchless ternary works because:
            // b ^ (a ^ b) == a
            // b ^ 0 == b
            return b ^ ((a ^ b) * SafeCast.toUint(condition));
        }
    }

    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return ternary(a > b, a, b);
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return ternary(a < b, a, b);
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow.
        return (a & b) + (a ^ b) / 2;
    }

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds towards infinity instead
     * of rounding towards zero.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        if (b == 0) {
            // Guarantee the same behavior as in a regular Solidity division.
            Panic.panic(Panic.DIVISION_BY_ZERO);
        }

        // The following calculation ensures accurate ceiling division without overflow.
        // Since a is non-zero, (a - 1) / b will not overflow.
        // The largest possible result occurs when (a - 1) / b is type(uint256).max,
        // but the largest value we can obtain is type(uint256).max - 1, which happens
        // when a = type(uint256).max and b = 1.
        unchecked {
            return SafeCast.toUint(a > 0) * ((a - 1) / b + 1);
        }
    }

    /**
     * @dev Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or
     * denominator == 0.
     *
     * Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) with further edits by
     * Uniswap Labs also under MIT license.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
        unchecked {
            (uint256 high, uint256 low) = mul512(x, y);

            // Handle non-overflow cases, 256 by 256 division.
            if (high == 0) {
                // Solidity will revert if denominator == 0, unlike the div opcode on its own.
                // The surrounding unchecked block does not change this fact.
                // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
                return low / denominator;
            }

            // Make sure the result is less than 2²⁵⁶. Also prevents denominator == 0.
            if (denominator <= high) {
                Panic.panic(ternary(denominator == 0, Panic.DIVISION_BY_ZERO, Panic.UNDER_OVERFLOW));
            }

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [high low].
            uint256 remainder;
            assembly ("memory-safe") {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                high := sub(high, gt(remainder, low))
                low := sub(low, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator.
            // Always >= 1. See https://cs.stackexchange.com/q/138556/92363.

            uint256 twos = denominator & (0 - denominator);
            assembly ("memory-safe") {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [high low] by twos.
                low := div(low, twos)

                // Flip twos such that it is 2²⁵⁶ / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from high into low.
            low |= high * twos;

            // Invert denominator mod 2²⁵⁶. Now that denominator is an odd number, it has an inverse modulo 2²⁵⁶ such
            // that denominator * inv ≡ 1 mod 2²⁵⁶. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv ≡ 1 mod 2⁴.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also
            // works in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2⁸
            inverse *= 2 - denominator * inverse; // inverse mod 2¹⁶
            inverse *= 2 - denominator * inverse; // inverse mod 2³²
            inverse *= 2 - denominator * inverse; // inverse mod 2⁶⁴
            inverse *= 2 - denominator * inverse; // inverse mod 2¹²⁸
            inverse *= 2 - denominator * inverse; // inverse mod 2²⁵⁶

            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2²⁵⁶. Since the preconditions guarantee that the outcome is
            // less than 2²⁵⁶, this is the final result. We don't need to compute the high bits of the result and high
            // is no longer required.
            result = low * inverse;
            return result;
        }
    }

    /**
     * @dev Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
        return mulDiv(x, y, denominator) + SafeCast.toUint(unsignedRoundsUp(rounding) && mulmod(x, y, denominator) > 0);
    }

    /**
     * @dev Calculates floor(x * y >> n) with full precision. Throws if result overflows a uint256.
     */
    function mulShr(uint256 x, uint256 y, uint8 n) internal pure returns (uint256 result) {
        unchecked {
            (uint256 high, uint256 low) = mul512(x, y);
            if (high >= 1 << n) {
                Panic.panic(Panic.UNDER_OVERFLOW);
            }
            return (high << (256 - n)) | (low >> n);
        }
    }

    /**
     * @dev Calculates x * y >> n with full precision, following the selected rounding direction.
     */
    function mulShr(uint256 x, uint256 y, uint8 n, Rounding rounding) internal pure returns (uint256) {
        return mulShr(x, y, n) + SafeCast.toUint(unsignedRoundsUp(rounding) && mulmod(x, y, 1 << n) > 0);
    }

    /**
     * @dev Calculate the modular multiplicative inverse of a number in Z/nZ.
     *
     * If n is a prime, then Z/nZ is a field. In that case all elements are inversible, except 0.
     * If n is not a prime, then Z/nZ is not a field, and some elements might not be inversible.
     *
     * If the input value is not inversible, 0 is returned.
     *
     * NOTE: If you know for sure that n is (big) a prime, it may be cheaper to use Fermat's little theorem and get the
     * inverse using `Math.modExp(a, n - 2, n)`. See {invModPrime}.
     */
    function invMod(uint256 a, uint256 n) internal pure returns (uint256) {
        unchecked {
            if (n == 0) return 0;

            // The inverse modulo is calculated using the Extended Euclidean Algorithm (iterative version)
            // Used to compute integers x and y such that: ax + ny = gcd(a, n).
            // When the gcd is 1, then the inverse of a modulo n exists and it's x.
            // ax + ny = 1
            // ax = 1 + (-y)n
            // ax ≡ 1 (mod n) # x is the inverse of a modulo n

            // If the remainder is 0 the gcd is n right away.
            uint256 remainder = a % n;
            uint256 gcd = n;

            // Therefore the initial coefficients are:
            // ax + ny = gcd(a, n) = n
            // 0a + 1n = n
            int256 x = 0;
            int256 y = 1;

            while (remainder != 0) {
                uint256 quotient = gcd / remainder;

                (gcd, remainder) = (
                    // The old remainder is the next gcd to try.
                    remainder,
                    // Compute the next remainder.
                    // Can't overflow given that (a % gcd) * (gcd // (a % gcd)) <= gcd
                    // where gcd is at most n (capped to type(uint256).max)
                    gcd - remainder * quotient
                );

                (x, y) = (
                    // Increment the coefficient of a.
                    y,
                    // Decrement the coefficient of n.
                    // Can overflow, but the result is casted to uint256 so that the
                    // next value of y is "wrapped around" to a value between 0 and n - 1.
                    x - y * int256(quotient)
                );
            }

            if (gcd != 1) return 0; // No inverse exists.
            return ternary(x < 0, n - uint256(-x), uint256(x)); // Wrap the result if it's negative.
        }
    }

    /**
     * @dev Variant of {invMod}. More efficient, but only works if `p` is known to be a prime greater than `2`.
     *
     * From https://en.wikipedia.org/wiki/Fermat%27s_little_theorem[Fermat's little theorem], we know that if p is
     * prime, then `a**(p-1) ≡ 1 mod p`. As a consequence, we have `a * a**(p-2) ≡ 1 mod p`, which means that
     * `a**(p-2)` is the modular multiplicative inverse of a in Fp.
     *
     * NOTE: this function does NOT check that `p` is a prime greater than `2`.
     */
    function invModPrime(uint256 a, uint256 p) internal view returns (uint256) {
        unchecked {
            return Math.modExp(a, p - 2, p);
        }
    }

    /**
     * @dev Returns the modular exponentiation of the specified base, exponent and modulus (b ** e % m)
     *
     * Requirements:
     * - modulus can't be zero
     * - underlying staticcall to precompile must succeed
     *
     * IMPORTANT: The result is only valid if the underlying call succeeds. When using this function, make
     * sure the chain you're using it on supports the precompiled contract for modular exponentiation
     * at address 0x05 as specified in https://eips.ethereum.org/EIPS/eip-198[EIP-198]. Otherwise,
     * the underlying function will succeed given the lack of a revert, but the result may be incorrectly
     * interpreted as 0.
     */
    function modExp(uint256 b, uint256 e, uint256 m) internal view returns (uint256) {
        (bool success, uint256 result) = tryModExp(b, e, m);
        if (!success) {
            Panic.panic(Panic.DIVISION_BY_ZERO);
        }
        return result;
    }

    /**
     * @dev Returns the modular exponentiation of the specified base, exponent and modulus (b ** e % m).
     * It includes a success flag indicating if the operation succeeded. Operation will be marked as failed if trying
     * to operate modulo 0 or if the underlying precompile reverted.
     *
     * IMPORTANT: The result is only valid if the success flag is true. When using this function, make sure the chain
     * you're using it on supports the precompiled contract for modular exponentiation at address 0x05 as specified in
     * https://eips.ethereum.org/EIPS/eip-198[EIP-198]. Otherwise, the underlying function will succeed given the lack
     * of a revert, but the result may be incorrectly interpreted as 0.
     */
    function tryModExp(uint256 b, uint256 e, uint256 m) internal view returns (bool success, uint256 result) {
        if (m == 0) return (false, 0);
        assembly ("memory-safe") {
            let ptr := mload(0x40)
            // | Offset    | Content    | Content (Hex)                                                      |
            // |-----------|------------|--------------------------------------------------------------------|
            // | 0x00:0x1f | size of b  | 0x0000000000000000000000000000000000000000000000000000000000000020 |
            // | 0x20:0x3f | size of e  | 0x0000000000000000000000000000000000000000000000000000000000000020 |
            // | 0x40:0x5f | size of m  | 0x0000000000000000000000000000000000000000000000000000000000000020 |
            // | 0x60:0x7f | value of b | 0x<.............................................................b> |
            // | 0x80:0x9f | value of e | 0x<.............................................................e> |
            // | 0xa0:0xbf | value of m | 0x<.............................................................m> |
            mstore(ptr, 0x20)
            mstore(add(ptr, 0x20), 0x20)
            mstore(add(ptr, 0x40), 0x20)
            mstore(add(ptr, 0x60), b)
            mstore(add(ptr, 0x80), e)
            mstore(add(ptr, 0xa0), m)

            // Given the result < m, it's guaranteed to fit in 32 bytes,
            // so we can use the memory scratch space located at offset 0.
            success := staticcall(gas(), 0x05, ptr, 0xc0, 0x00, 0x20)
            result := mload(0x00)
        }
    }

    /**
     * @dev Variant of {modExp} that supports inputs of arbitrary length.
     */
    function modExp(bytes memory b, bytes memory e, bytes memory m) internal view returns (bytes memory) {
        (bool success, bytes memory result) = tryModExp(b, e, m);
        if (!success) {
            Panic.panic(Panic.DIVISION_BY_ZERO);
        }
        return result;
    }

    /**
     * @dev Variant of {tryModExp} that supports inputs of arbitrary length.
     */
    function tryModExp(
        bytes memory b,
        bytes memory e,
        bytes memory m
    ) internal view returns (bool success, bytes memory result) {
        if (_zeroBytes(m)) return (false, new bytes(0));

        uint256 mLen = m.length;

        // Encode call args in result and move the free memory pointer
        result = abi.encodePacked(b.length, e.length, mLen, b, e, m);

        assembly ("memory-safe") {
            let dataPtr := add(result, 0x20)
            // Write result on top of args to avoid allocating extra memory.
            success := staticcall(gas(), 0x05, dataPtr, mload(result), dataPtr, mLen)
            // Overwrite the length.
            // result.length > returndatasize() is guaranteed because returndatasize() == m.length
            mstore(result, mLen)
            // Set the memory pointer after the returned data.
            mstore(0x40, add(dataPtr, mLen))
        }
    }

    /**
     * @dev Returns whether the provided byte array is zero.
     */
    function _zeroBytes(bytes memory byteArray) private pure returns (bool) {
        for (uint256 i = 0; i < byteArray.length; ++i) {
            if (byteArray[i] != 0) {
                return false;
            }
        }
        return true;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded
     * towards zero.
     *
     * This method is based on Newton's method for computing square roots; the algorithm is restricted to only
     * using integer operations.
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        unchecked {
            // Take care of easy edge cases when a == 0 or a == 1
            if (a <= 1) {
                return a;
            }

            // In this function, we use Newton's method to get a root of `f(x) := x² - a`. It involves building a
            // sequence x_n that converges toward sqrt(a). For each iteration x_n, we also define the error between
            // the current value as `ε_n = | x_n - sqrt(a) |`.
            //
            // For our first estimation, we consider `e` the smallest power of 2 which is bigger than the square root
            // of the target. (i.e. `2**(e-1) ≤ sqrt(a) < 2**e`). We know that `e ≤ 128` because `(2¹²⁸)² = 2²⁵⁶` is
            // bigger than any uint256.
            //
            // By noticing that
            // `2**(e-1) ≤ sqrt(a) < 2**e → (2**(e-1))² ≤ a < (2**e)² → 2**(2*e-2) ≤ a < 2**(2*e)`
            // we can deduce that `e - 1` is `log2(a) / 2`. We can thus compute `x_n = 2**(e-1)` using a method similar
            // to the msb function.
            uint256 aa = a;
            uint256 xn = 1;

            if (aa >= (1 << 128)) {
                aa >>= 128;
                xn <<= 64;
            }
            if (aa >= (1 << 64)) {
                aa >>= 64;
                xn <<= 32;
            }
            if (aa >= (1 << 32)) {
                aa >>= 32;
                xn <<= 16;
            }
            if (aa >= (1 << 16)) {
                aa >>= 16;
                xn <<= 8;
            }
            if (aa >= (1 << 8)) {
                aa >>= 8;
                xn <<= 4;
            }
            if (aa >= (1 << 4)) {
                aa >>= 4;
                xn <<= 2;
            }
            if (aa >= (1 << 2)) {
                xn <<= 1;
            }

            // We now have x_n such that `x_n = 2**(e-1) ≤ sqrt(a) < 2**e = 2 * x_n`. This implies ε_n ≤ 2**(e-1).
            //
            // We can refine our estimation by noticing that the middle of that interval minimizes the error.
            // If we move x_n to equal 2**(e-1) + 2**(e-2), then we reduce the error to ε_n ≤ 2**(e-2).
            // This is going to be our x_0 (and ε_0)
            xn = (3 * xn) >> 1; // ε_0 := | x_0 - sqrt(a) | ≤ 2**(e-2)

            // From here, Newton's method give us:
            // x_{n+1} = (x_n + a / x_n) / 2
            //
            // One should note that:
            // x_{n+1}² - a = ((x_n + a / x_n) / 2)² - a
            //              = ((x_n² + a) / (2 * x_n))² - a
            //              = (x_n⁴ + 2 * a * x_n² + a²) / (4 * x_n²) - a
            //              = (x_n⁴ + 2 * a * x_n² + a² - 4 * a * x_n²) / (4 * x_n²)
            //              = (x_n⁴ - 2 * a * x_n² + a²) / (4 * x_n²)
            //              = (x_n² - a)² / (2 * x_n)²
            //              = ((x_n² - a) / (2 * x_n))²
            //              ≥ 0
            // Which proves that for all n ≥ 1, sqrt(a) ≤ x_n
            //
            // This gives us the proof of quadratic convergence of the sequence:
            // ε_{n+1} = | x_{n+1} - sqrt(a) |
            //         = | (x_n + a / x_n) / 2 - sqrt(a) |
            //         = | (x_n² + a - 2*x_n*sqrt(a)) / (2 * x_n) |
            //         = | (x_n - sqrt(a))² / (2 * x_n) |
            //         = | ε_n² / (2 * x_n) |
            //         = ε_n² / | (2 * x_n) |
            //
            // For the first iteration, we have a special case where x_0 is known:
            // ε_1 = ε_0² / | (2 * x_0) |
            //     ≤ (2**(e-2))² / (2 * (2**(e-1) + 2**(e-2)))
            //     ≤ 2**(2*e-4) / (3 * 2**(e-1))
            //     ≤ 2**(e-3) / 3
            //     ≤ 2**(e-3-log2(3))
            //     ≤ 2**(e-4.5)
            //
            // For the following iterations, we use the fact that, 2**(e-1) ≤ sqrt(a) ≤ x_n:
            // ε_{n+1} = ε_n² / | (2 * x_n) |
            //         ≤ (2**(e-k))² / (2 * 2**(e-1))
            //         ≤ 2**(2*e-2*k) / 2**e
            //         ≤ 2**(e-2*k)
            xn = (xn + a / xn) >> 1; // ε_1 := | x_1 - sqrt(a) | ≤ 2**(e-4.5)  -- special case, see above
            xn = (xn + a / xn) >> 1; // ε_2 := | x_2 - sqrt(a) | ≤ 2**(e-9)    -- general case with k = 4.5
            xn = (xn + a / xn) >> 1; // ε_3 := | x_3 - sqrt(a) | ≤ 2**(e-18)   -- general case with k = 9
            xn = (xn + a / xn) >> 1; // ε_4 := | x_4 - sqrt(a) | ≤ 2**(e-36)   -- general case with k = 18
            xn = (xn + a / xn) >> 1; // ε_5 := | x_5 - sqrt(a) | ≤ 2**(e-72)   -- general case with k = 36
            xn = (xn + a / xn) >> 1; // ε_6 := | x_6 - sqrt(a) | ≤ 2**(e-144)  -- general case with k = 72

            // Because e ≤ 128 (as discussed during the first estimation phase), we know have reached a precision
            // ε_6 ≤ 2**(e-144) < 1. Given we're operating on integers, then we can ensure that xn is now either
            // sqrt(a) or sqrt(a) + 1.
            return xn - SafeCast.toUint(xn > a / xn);
        }
    }

    /**
     * @dev Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + SafeCast.toUint(unsignedRoundsUp(rounding) && result * result < a);
        }
    }

    /**
     * @dev Return the log in base 2 of a positive value rounded towards zero.
     * Returns 0 if given 0.
     */
    function log2(uint256 x) internal pure returns (uint256 r) {
        // If value has upper 128 bits set, log2 result is at least 128
        r = SafeCast.toUint(x > 0xffffffffffffffffffffffffffffffff) << 7;
        // If upper 64 bits of 128-bit half set, add 64 to result
        r |= SafeCast.toUint((x >> r) > 0xffffffffffffffff) << 6;
        // If upper 32 bits of 64-bit half set, add 32 to result
        r |= SafeCast.toUint((x >> r) > 0xffffffff) << 5;
        // If upper 16 bits of 32-bit half set, add 16 to result
        r |= SafeCast.toUint((x >> r) > 0xffff) << 4;
        // If upper 8 bits of 16-bit half set, add 8 to result
        r |= SafeCast.toUint((x >> r) > 0xff) << 3;
        // If upper 4 bits of 8-bit half set, add 4 to result
        r |= SafeCast.toUint((x >> r) > 0xf) << 2;

        // Shifts value right by the current result and use it as an index into this lookup table:
        //
        // | x (4 bits) |  index  | table[index] = MSB position |
        // |------------|---------|-----------------------------|
        // |    0000    |    0    |        table[0] = 0         |
        // |    0001    |    1    |        table[1] = 0         |
        // |    0010    |    2    |        table[2] = 1         |
        // |    0011    |    3    |        table[3] = 1         |
        // |    0100    |    4    |        table[4] = 2         |
        // |    0101    |    5    |        table[5] = 2         |
        // |    0110    |    6    |        table[6] = 2         |
        // |    0111    |    7    |        table[7] = 2         |
        // |    1000    |    8    |        table[8] = 3         |
        // |    1001    |    9    |        table[9] = 3         |
        // |    1010    |   10    |        table[10] = 3        |
        // |    1011    |   11    |        table[11] = 3        |
        // |    1100    |   12    |        table[12] = 3        |
        // |    1101    |   13    |        table[13] = 3        |
        // |    1110    |   14    |        table[14] = 3        |
        // |    1111    |   15    |        table[15] = 3        |
        //
        // The lookup table is represented as a 32-byte value with the MSB positions for 0-15 in the last 16 bytes.
        assembly ("memory-safe") {
            r := or(r, byte(shr(r, x), 0x0000010102020202030303030303030300000000000000000000000000000000))
        }
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + SafeCast.toUint(unsignedRoundsUp(rounding) && 1 << result < value);
        }
    }

    /**
     * @dev Return the log in base 10 of a positive value rounded towards zero.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10 ** 64) {
                value /= 10 ** 64;
                result += 64;
            }
            if (value >= 10 ** 32) {
                value /= 10 ** 32;
                result += 32;
            }
            if (value >= 10 ** 16) {
                value /= 10 ** 16;
                result += 16;
            }
            if (value >= 10 ** 8) {
                value /= 10 ** 8;
                result += 8;
            }
            if (value >= 10 ** 4) {
                value /= 10 ** 4;
                result += 4;
            }
            if (value >= 10 ** 2) {
                value /= 10 ** 2;
                result += 2;
            }
            if (value >= 10 ** 1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + SafeCast.toUint(unsignedRoundsUp(rounding) && 10 ** result < value);
        }
    }

    /**
     * @dev Return the log in base 256 of a positive value rounded towards zero.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 x) internal pure returns (uint256 r) {
        // If value has upper 128 bits set, log2 result is at least 128
        r = SafeCast.toUint(x > 0xffffffffffffffffffffffffffffffff) << 7;
        // If upper 64 bits of 128-bit half set, add 64 to result
        r |= SafeCast.toUint((x >> r) > 0xffffffffffffffff) << 6;
        // If upper 32 bits of 64-bit half set, add 32 to result
        r |= SafeCast.toUint((x >> r) > 0xffffffff) << 5;
        // If upper 16 bits of 32-bit half set, add 16 to result
        r |= SafeCast.toUint((x >> r) > 0xffff) << 4;
        // Add 1 if upper 8 bits of 16-bit half set, and divide accumulated result by 8
        return (r >> 3) | SafeCast.toUint((x >> r) > 0xff);
    }

    /**
     * @dev Return the log in base 256, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + SafeCast.toUint(unsignedRoundsUp(rounding) && 1 << (result << 3) < value);
        }
    }

    /**
     * @dev Returns whether a provided rounding mode is considered rounding up for unsigned integers.
     */
    function unsignedRoundsUp(Rounding rounding) internal pure returns (bool) {
        return uint8(rounding) % 2 == 1;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/math/SafeCast.sol)
// This file was procedurally generated from scripts/generate/templates/SafeCast.js.

pragma solidity ^0.8.20;

/**
 * @dev Wrappers over Solidity's uintXX/intXX/bool casting operators with added overflow
 * checks.
 *
 * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can
 * easily result in undesired exploitation or bugs, since developers usually
 * assume that overflows raise errors. `SafeCast` restores this intuition by
 * reverting the transaction when such an operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeCast {
    /**
     * @dev Value doesn't fit in an uint of `bits` size.
     */
    error SafeCastOverflowedUintDowncast(uint8 bits, uint256 value);

    /**
     * @dev An int value doesn't fit in an uint of `bits` size.
     */
    error SafeCastOverflowedIntToUint(int256 value);

    /**
     * @dev Value doesn't fit in an int of `bits` size.
     */
    error SafeCastOverflowedIntDowncast(uint8 bits, int256 value);

    /**
     * @dev An uint value doesn't fit in an int of `bits` size.
     */
    error SafeCastOverflowedUintToInt(uint256 value);

    /**
     * @dev Returns the downcasted uint248 from uint256, reverting on
     * overflow (when the input is greater than largest uint248).
     *
     * Counterpart to Solidity's `uint248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     */
    function toUint248(uint256 value) internal pure returns (uint248) {
        if (value > type(uint248).max) {
            revert SafeCastOverflowedUintDowncast(248, value);
        }
        return uint248(value);
    }

    /**
     * @dev Returns the downcasted uint240 from uint256, reverting on
     * overflow (when the input is greater than largest uint240).
     *
     * Counterpart to Solidity's `uint240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     */
    function toUint240(uint256 value) internal pure returns (uint240) {
        if (value > type(uint240).max) {
            revert SafeCastOverflowedUintDowncast(240, value);
        }
        return uint240(value);
    }

    /**
     * @dev Returns the downcasted uint232 from uint256, reverting on
     * overflow (when the input is greater than largest uint232).
     *
     * Counterpart to Solidity's `uint232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     */
    function toUint232(uint256 value) internal pure returns (uint232) {
        if (value > type(uint232).max) {
            revert SafeCastOverflowedUintDowncast(232, value);
        }
        return uint232(value);
    }

    /**
     * @dev Returns the downcasted uint224 from uint256, reverting on
     * overflow (when the input is greater than largest uint224).
     *
     * Counterpart to Solidity's `uint224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     */
    function toUint224(uint256 value) internal pure returns (uint224) {
        if (value > type(uint224).max) {
            revert SafeCastOverflowedUintDowncast(224, value);
        }
        return uint224(value);
    }

    /**
     * @dev Returns the downcasted uint216 from uint256, reverting on
     * overflow (when the input is greater than largest uint216).
     *
     * Counterpart to Solidity's `uint216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     */
    function toUint216(uint256 value) internal pure returns (uint216) {
        if (value > type(uint216).max) {
            revert SafeCastOverflowedUintDowncast(216, value);
        }
        return uint216(value);
    }

    /**
     * @dev Returns the downcasted uint208 from uint256, reverting on
     * overflow (when the input is greater than largest uint208).
     *
     * Counterpart to Solidity's `uint208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     */
    function toUint208(uint256 value) internal pure returns (uint208) {
        if (value > type(uint208).max) {
            revert SafeCastOverflowedUintDowncast(208, value);
        }
        return uint208(value);
    }

    /**
     * @dev Returns the downcasted uint200 from uint256, reverting on
     * overflow (when the input is greater than largest uint200).
     *
     * Counterpart to Solidity's `uint200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     */
    function toUint200(uint256 value) internal pure returns (uint200) {
        if (value > type(uint200).max) {
            revert SafeCastOverflowedUintDowncast(200, value);
        }
        return uint200(value);
    }

    /**
     * @dev Returns the downcasted uint192 from uint256, reverting on
     * overflow (when the input is greater than largest uint192).
     *
     * Counterpart to Solidity's `uint192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     */
    function toUint192(uint256 value) internal pure returns (uint192) {
        if (value > type(uint192).max) {
            revert SafeCastOverflowedUintDowncast(192, value);
        }
        return uint192(value);
    }

    /**
     * @dev Returns the downcasted uint184 from uint256, reverting on
     * overflow (when the input is greater than largest uint184).
     *
     * Counterpart to Solidity's `uint184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     */
    function toUint184(uint256 value) internal pure returns (uint184) {
        if (value > type(uint184).max) {
            revert SafeCastOverflowedUintDowncast(184, value);
        }
        return uint184(value);
    }

    /**
     * @dev Returns the downcasted uint176 from uint256, reverting on
     * overflow (when the input is greater than largest uint176).
     *
     * Counterpart to Solidity's `uint176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     */
    function toUint176(uint256 value) internal pure returns (uint176) {
        if (value > type(uint176).max) {
            revert SafeCastOverflowedUintDowncast(176, value);
        }
        return uint176(value);
    }

    /**
     * @dev Returns the downcasted uint168 from uint256, reverting on
     * overflow (when the input is greater than largest uint168).
     *
     * Counterpart to Solidity's `uint168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     */
    function toUint168(uint256 value) internal pure returns (uint168) {
        if (value > type(uint168).max) {
            revert SafeCastOverflowedUintDowncast(168, value);
        }
        return uint168(value);
    }

    /**
     * @dev Returns the downcasted uint160 from uint256, reverting on
     * overflow (when the input is greater than largest uint160).
     *
     * Counterpart to Solidity's `uint160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     */
    function toUint160(uint256 value) internal pure returns (uint160) {
        if (value > type(uint160).max) {
            revert SafeCastOverflowedUintDowncast(160, value);
        }
        return uint160(value);
    }

    /**
     * @dev Returns the downcasted uint152 from uint256, reverting on
     * overflow (when the input is greater than largest uint152).
     *
     * Counterpart to Solidity's `uint152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     */
    function toUint152(uint256 value) internal pure returns (uint152) {
        if (value > type(uint152).max) {
            revert SafeCastOverflowedUintDowncast(152, value);
        }
        return uint152(value);
    }

    /**
     * @dev Returns the downcasted uint144 from uint256, reverting on
     * overflow (when the input is greater than largest uint144).
     *
     * Counterpart to Solidity's `uint144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     */
    function toUint144(uint256 value) internal pure returns (uint144) {
        if (value > type(uint144).max) {
            revert SafeCastOverflowedUintDowncast(144, value);
        }
        return uint144(value);
    }

    /**
     * @dev Returns the downcasted uint136 from uint256, reverting on
     * overflow (when the input is greater than largest uint136).
     *
     * Counterpart to Solidity's `uint136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     */
    function toUint136(uint256 value) internal pure returns (uint136) {
        if (value > type(uint136).max) {
            revert SafeCastOverflowedUintDowncast(136, value);
        }
        return uint136(value);
    }

    /**
     * @dev Returns the downcasted uint128 from uint256, reverting on
     * overflow (when the input is greater than largest uint128).
     *
     * Counterpart to Solidity's `uint128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     */
    function toUint128(uint256 value) internal pure returns (uint128) {
        if (value > type(uint128).max) {
            revert SafeCastOverflowedUintDowncast(128, value);
        }
        return uint128(value);
    }

    /**
     * @dev Returns the downcasted uint120 from uint256, reverting on
     * overflow (when the input is greater than largest uint120).
     *
     * Counterpart to Solidity's `uint120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     */
    function toUint120(uint256 value) internal pure returns (uint120) {
        if (value > type(uint120).max) {
            revert SafeCastOverflowedUintDowncast(120, value);
        }
        return uint120(value);
    }

    /**
     * @dev Returns the downcasted uint112 from uint256, reverting on
     * overflow (when the input is greater than largest uint112).
     *
     * Counterpart to Solidity's `uint112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     */
    function toUint112(uint256 value) internal pure returns (uint112) {
        if (value > type(uint112).max) {
            revert SafeCastOverflowedUintDowncast(112, value);
        }
        return uint112(value);
    }

    /**
     * @dev Returns the downcasted uint104 from uint256, reverting on
     * overflow (when the input is greater than largest uint104).
     *
     * Counterpart to Solidity's `uint104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     */
    function toUint104(uint256 value) internal pure returns (uint104) {
        if (value > type(uint104).max) {
            revert SafeCastOverflowedUintDowncast(104, value);
        }
        return uint104(value);
    }

    /**
     * @dev Returns the downcasted uint96 from uint256, reverting on
     * overflow (when the input is greater than largest uint96).
     *
     * Counterpart to Solidity's `uint96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     */
    function toUint96(uint256 value) internal pure returns (uint96) {
        if (value > type(uint96).max) {
            revert SafeCastOverflowedUintDowncast(96, value);
        }
        return uint96(value);
    }

    /**
     * @dev Returns the downcasted uint88 from uint256, reverting on
     * overflow (when the input is greater than largest uint88).
     *
     * Counterpart to Solidity's `uint88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     */
    function toUint88(uint256 value) internal pure returns (uint88) {
        if (value > type(uint88).max) {
            revert SafeCastOverflowedUintDowncast(88, value);
        }
        return uint88(value);
    }

    /**
     * @dev Returns the downcasted uint80 from uint256, reverting on
     * overflow (when the input is greater than largest uint80).
     *
     * Counterpart to Solidity's `uint80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     */
    function toUint80(uint256 value) internal pure returns (uint80) {
        if (value > type(uint80).max) {
            revert SafeCastOverflowedUintDowncast(80, value);
        }
        return uint80(value);
    }

    /**
     * @dev Returns the downcasted uint72 from uint256, reverting on
     * overflow (when the input is greater than largest uint72).
     *
     * Counterpart to Solidity's `uint72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     */
    function toUint72(uint256 value) internal pure returns (uint72) {
        if (value > type(uint72).max) {
            revert SafeCastOverflowedUintDowncast(72, value);
        }
        return uint72(value);
    }

    /**
     * @dev Returns the downcasted uint64 from uint256, reverting on
     * overflow (when the input is greater than largest uint64).
     *
     * Counterpart to Solidity's `uint64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     */
    function toUint64(uint256 value) internal pure returns (uint64) {
        if (value > type(uint64).max) {
            revert SafeCastOverflowedUintDowncast(64, value);
        }
        return uint64(value);
    }

    /**
     * @dev Returns the downcasted uint56 from uint256, reverting on
     * overflow (when the input is greater than largest uint56).
     *
     * Counterpart to Solidity's `uint56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     */
    function toUint56(uint256 value) internal pure returns (uint56) {
        if (value > type(uint56).max) {
            revert SafeCastOverflowedUintDowncast(56, value);
        }
        return uint56(value);
    }

    /**
     * @dev Returns the downcasted uint48 from uint256, reverting on
     * overflow (when the input is greater than largest uint48).
     *
     * Counterpart to Solidity's `uint48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     */
    function toUint48(uint256 value) internal pure returns (uint48) {
        if (value > type(uint48).max) {
            revert SafeCastOverflowedUintDowncast(48, value);
        }
        return uint48(value);
    }

    /**
     * @dev Returns the downcasted uint40 from uint256, reverting on
     * overflow (when the input is greater than largest uint40).
     *
     * Counterpart to Solidity's `uint40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     */
    function toUint40(uint256 value) internal pure returns (uint40) {
        if (value > type(uint40).max) {
            revert SafeCastOverflowedUintDowncast(40, value);
        }
        return uint40(value);
    }

    /**
     * @dev Returns the downcasted uint32 from uint256, reverting on
     * overflow (when the input is greater than largest uint32).
     *
     * Counterpart to Solidity's `uint32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     */
    function toUint32(uint256 value) internal pure returns (uint32) {
        if (value > type(uint32).max) {
            revert SafeCastOverflowedUintDowncast(32, value);
        }
        return uint32(value);
    }

    /**
     * @dev Returns the downcasted uint24 from uint256, reverting on
     * overflow (when the input is greater than largest uint24).
     *
     * Counterpart to Solidity's `uint24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     */
    function toUint24(uint256 value) internal pure returns (uint24) {
        if (value > type(uint24).max) {
            revert SafeCastOverflowedUintDowncast(24, value);
        }
        return uint24(value);
    }

    /**
     * @dev Returns the downcasted uint16 from uint256, reverting on
     * overflow (when the input is greater than largest uint16).
     *
     * Counterpart to Solidity's `uint16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     */
    function toUint16(uint256 value) internal pure returns (uint16) {
        if (value > type(uint16).max) {
            revert SafeCastOverflowedUintDowncast(16, value);
        }
        return uint16(value);
    }

    /**
     * @dev Returns the downcasted uint8 from uint256, reverting on
     * overflow (when the input is greater than largest uint8).
     *
     * Counterpart to Solidity's `uint8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     */
    function toUint8(uint256 value) internal pure returns (uint8) {
        if (value > type(uint8).max) {
            revert SafeCastOverflowedUintDowncast(8, value);
        }
        return uint8(value);
    }

    /**
     * @dev Converts a signed int256 into an unsigned uint256.
     *
     * Requirements:
     *
     * - input must be greater than or equal to 0.
     */
    function toUint256(int256 value) internal pure returns (uint256) {
        if (value < 0) {
            revert SafeCastOverflowedIntToUint(value);
        }
        return uint256(value);
    }

    /**
     * @dev Returns the downcasted int248 from int256, reverting on
     * overflow (when the input is less than smallest int248 or
     * greater than largest int248).
     *
     * Counterpart to Solidity's `int248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     */
    function toInt248(int256 value) internal pure returns (int248 downcasted) {
        downcasted = int248(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(248, value);
        }
    }

    /**
     * @dev Returns the downcasted int240 from int256, reverting on
     * overflow (when the input is less than smallest int240 or
     * greater than largest int240).
     *
     * Counterpart to Solidity's `int240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     */
    function toInt240(int256 value) internal pure returns (int240 downcasted) {
        downcasted = int240(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(240, value);
        }
    }

    /**
     * @dev Returns the downcasted int232 from int256, reverting on
     * overflow (when the input is less than smallest int232 or
     * greater than largest int232).
     *
     * Counterpart to Solidity's `int232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     */
    function toInt232(int256 value) internal pure returns (int232 downcasted) {
        downcasted = int232(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(232, value);
        }
    }

    /**
     * @dev Returns the downcasted int224 from int256, reverting on
     * overflow (when the input is less than smallest int224 or
     * greater than largest int224).
     *
     * Counterpart to Solidity's `int224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     */
    function toInt224(int256 value) internal pure returns (int224 downcasted) {
        downcasted = int224(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(224, value);
        }
    }

    /**
     * @dev Returns the downcasted int216 from int256, reverting on
     * overflow (when the input is less than smallest int216 or
     * greater than largest int216).
     *
     * Counterpart to Solidity's `int216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     */
    function toInt216(int256 value) internal pure returns (int216 downcasted) {
        downcasted = int216(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(216, value);
        }
    }

    /**
     * @dev Returns the downcasted int208 from int256, reverting on
     * overflow (when the input is less than smallest int208 or
     * greater than largest int208).
     *
     * Counterpart to Solidity's `int208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     */
    function toInt208(int256 value) internal pure returns (int208 downcasted) {
        downcasted = int208(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(208, value);
        }
    }

    /**
     * @dev Returns the downcasted int200 from int256, reverting on
     * overflow (when the input is less than smallest int200 or
     * greater than largest int200).
     *
     * Counterpart to Solidity's `int200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     */
    function toInt200(int256 value) internal pure returns (int200 downcasted) {
        downcasted = int200(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(200, value);
        }
    }

    /**
     * @dev Returns the downcasted int192 from int256, reverting on
     * overflow (when the input is less than smallest int192 or
     * greater than largest int192).
     *
     * Counterpart to Solidity's `int192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     */
    function toInt192(int256 value) internal pure returns (int192 downcasted) {
        downcasted = int192(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(192, value);
        }
    }

    /**
     * @dev Returns the downcasted int184 from int256, reverting on
     * overflow (when the input is less than smallest int184 or
     * greater than largest int184).
     *
     * Counterpart to Solidity's `int184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     */
    function toInt184(int256 value) internal pure returns (int184 downcasted) {
        downcasted = int184(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(184, value);
        }
    }

    /**
     * @dev Returns the downcasted int176 from int256, reverting on
     * overflow (when the input is less than smallest int176 or
     * greater than largest int176).
     *
     * Counterpart to Solidity's `int176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     */
    function toInt176(int256 value) internal pure returns (int176 downcasted) {
        downcasted = int176(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(176, value);
        }
    }

    /**
     * @dev Returns the downcasted int168 from int256, reverting on
     * overflow (when the input is less than smallest int168 or
     * greater than largest int168).
     *
     * Counterpart to Solidity's `int168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     */
    function toInt168(int256 value) internal pure returns (int168 downcasted) {
        downcasted = int168(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(168, value);
        }
    }

    /**
     * @dev Returns the downcasted int160 from int256, reverting on
     * overflow (when the input is less than smallest int160 or
     * greater than largest int160).
     *
     * Counterpart to Solidity's `int160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     */
    function toInt160(int256 value) internal pure returns (int160 downcasted) {
        downcasted = int160(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(160, value);
        }
    }

    /**
     * @dev Returns the downcasted int152 from int256, reverting on
     * overflow (when the input is less than smallest int152 or
     * greater than largest int152).
     *
     * Counterpart to Solidity's `int152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     */
    function toInt152(int256 value) internal pure returns (int152 downcasted) {
        downcasted = int152(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(152, value);
        }
    }

    /**
     * @dev Returns the downcasted int144 from int256, reverting on
     * overflow (when the input is less than smallest int144 or
     * greater than largest int144).
     *
     * Counterpart to Solidity's `int144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     */
    function toInt144(int256 value) internal pure returns (int144 downcasted) {
        downcasted = int144(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(144, value);
        }
    }

    /**
     * @dev Returns the downcasted int136 from int256, reverting on
     * overflow (when the input is less than smallest int136 or
     * greater than largest int136).
     *
     * Counterpart to Solidity's `int136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     */
    function toInt136(int256 value) internal pure returns (int136 downcasted) {
        downcasted = int136(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(136, value);
        }
    }

    /**
     * @dev Returns the downcasted int128 from int256, reverting on
     * overflow (when the input is less than smallest int128 or
     * greater than largest int128).
     *
     * Counterpart to Solidity's `int128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     */
    function toInt128(int256 value) internal pure returns (int128 downcasted) {
        downcasted = int128(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(128, value);
        }
    }

    /**
     * @dev Returns the downcasted int120 from int256, reverting on
     * overflow (when the input is less than smallest int120 or
     * greater than largest int120).
     *
     * Counterpart to Solidity's `int120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     */
    function toInt120(int256 value) internal pure returns (int120 downcasted) {
        downcasted = int120(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(120, value);
        }
    }

    /**
     * @dev Returns the downcasted int112 from int256, reverting on
     * overflow (when the input is less than smallest int112 or
     * greater than largest int112).
     *
     * Counterpart to Solidity's `int112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     */
    function toInt112(int256 value) internal pure returns (int112 downcasted) {
        downcasted = int112(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(112, value);
        }
    }

    /**
     * @dev Returns the downcasted int104 from int256, reverting on
     * overflow (when the input is less than smallest int104 or
     * greater than largest int104).
     *
     * Counterpart to Solidity's `int104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     */
    function toInt104(int256 value) internal pure returns (int104 downcasted) {
        downcasted = int104(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(104, value);
        }
    }

    /**
     * @dev Returns the downcasted int96 from int256, reverting on
     * overflow (when the input is less than smallest int96 or
     * greater than largest int96).
     *
     * Counterpart to Solidity's `int96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     */
    function toInt96(int256 value) internal pure returns (int96 downcasted) {
        downcasted = int96(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(96, value);
        }
    }

    /**
     * @dev Returns the downcasted int88 from int256, reverting on
     * overflow (when the input is less than smallest int88 or
     * greater than largest int88).
     *
     * Counterpart to Solidity's `int88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     */
    function toInt88(int256 value) internal pure returns (int88 downcasted) {
        downcasted = int88(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(88, value);
        }
    }

    /**
     * @dev Returns the downcasted int80 from int256, reverting on
     * overflow (when the input is less than smallest int80 or
     * greater than largest int80).
     *
     * Counterpart to Solidity's `int80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     */
    function toInt80(int256 value) internal pure returns (int80 downcasted) {
        downcasted = int80(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(80, value);
        }
    }

    /**
     * @dev Returns the downcasted int72 from int256, reverting on
     * overflow (when the input is less than smallest int72 or
     * greater than largest int72).
     *
     * Counterpart to Solidity's `int72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     */
    function toInt72(int256 value) internal pure returns (int72 downcasted) {
        downcasted = int72(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(72, value);
        }
    }

    /**
     * @dev Returns the downcasted int64 from int256, reverting on
     * overflow (when the input is less than smallest int64 or
     * greater than largest int64).
     *
     * Counterpart to Solidity's `int64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     */
    function toInt64(int256 value) internal pure returns (int64 downcasted) {
        downcasted = int64(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(64, value);
        }
    }

    /**
     * @dev Returns the downcasted int56 from int256, reverting on
     * overflow (when the input is less than smallest int56 or
     * greater than largest int56).
     *
     * Counterpart to Solidity's `int56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     */
    function toInt56(int256 value) internal pure returns (int56 downcasted) {
        downcasted = int56(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(56, value);
        }
    }

    /**
     * @dev Returns the downcasted int48 from int256, reverting on
     * overflow (when the input is less than smallest int48 or
     * greater than largest int48).
     *
     * Counterpart to Solidity's `int48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     */
    function toInt48(int256 value) internal pure returns (int48 downcasted) {
        downcasted = int48(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(48, value);
        }
    }

    /**
     * @dev Returns the downcasted int40 from int256, reverting on
     * overflow (when the input is less than smallest int40 or
     * greater than largest int40).
     *
     * Counterpart to Solidity's `int40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     */
    function toInt40(int256 value) internal pure returns (int40 downcasted) {
        downcasted = int40(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(40, value);
        }
    }

    /**
     * @dev Returns the downcasted int32 from int256, reverting on
     * overflow (when the input is less than smallest int32 or
     * greater than largest int32).
     *
     * Counterpart to Solidity's `int32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     */
    function toInt32(int256 value) internal pure returns (int32 downcasted) {
        downcasted = int32(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(32, value);
        }
    }

    /**
     * @dev Returns the downcasted int24 from int256, reverting on
     * overflow (when the input is less than smallest int24 or
     * greater than largest int24).
     *
     * Counterpart to Solidity's `int24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     */
    function toInt24(int256 value) internal pure returns (int24 downcasted) {
        downcasted = int24(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(24, value);
        }
    }

    /**
     * @dev Returns the downcasted int16 from int256, reverting on
     * overflow (when the input is less than smallest int16 or
     * greater than largest int16).
     *
     * Counterpart to Solidity's `int16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     */
    function toInt16(int256 value) internal pure returns (int16 downcasted) {
        downcasted = int16(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(16, value);
        }
    }

    /**
     * @dev Returns the downcasted int8 from int256, reverting on
     * overflow (when the input is less than smallest int8 or
     * greater than largest int8).
     *
     * Counterpart to Solidity's `int8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     */
    function toInt8(int256 value) internal pure returns (int8 downcasted) {
        downcasted = int8(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(8, value);
        }
    }

    /**
     * @dev Converts an unsigned uint256 into a signed int256.
     *
     * Requirements:
     *
     * - input must be less than or equal to maxInt256.
     */
    function toInt256(uint256 value) internal pure returns (int256) {
        // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive
        if (value > uint256(type(int256).max)) {
            revert SafeCastOverflowedUintToInt(value);
        }
        return int256(value);
    }

    /**
     * @dev Cast a boolean (false or true) to a uint256 (0 or 1) with no jump.
     */
    function toUint(bool b) internal pure returns (uint256 u) {
        assembly ("memory-safe") {
            u := iszero(iszero(b))
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/math/SignedMath.sol)

pragma solidity ^0.8.20;

import {SafeCast} from "./SafeCast.sol";

/**
 * @dev Standard signed math utilities missing in the Solidity language.
 */
library SignedMath {
    /**
     * @dev Branchless ternary evaluation for `a ? b : c`. Gas costs are constant.
     *
     * IMPORTANT: This function may reduce bytecode size and consume less gas when used standalone.
     * However, the compiler may optimize Solidity ternary operations (i.e. `a ? b : c`) to only compute
     * one branch when needed, making this function more expensive.
     */
    function ternary(bool condition, int256 a, int256 b) internal pure returns (int256) {
        unchecked {
            // branchless ternary works because:
            // b ^ (a ^ b) == a
            // b ^ 0 == b
            return b ^ ((a ^ b) * int256(SafeCast.toUint(condition)));
        }
    }

    /**
     * @dev Returns the largest of two signed numbers.
     */
    function max(int256 a, int256 b) internal pure returns (int256) {
        return ternary(a > b, a, b);
    }

    /**
     * @dev Returns the smallest of two signed numbers.
     */
    function min(int256 a, int256 b) internal pure returns (int256) {
        return ternary(a < b, a, b);
    }

    /**
     * @dev Returns the average of two signed numbers without overflow.
     * The result is rounded towards zero.
     */
    function average(int256 a, int256 b) internal pure returns (int256) {
        // Formula from the book "Hacker's Delight"
        int256 x = (a & b) + ((a ^ b) >> 1);
        return x + (int256(uint256(x) >> 255) & (a ^ b));
    }

    /**
     * @dev Returns the absolute unsigned value of a signed value.
     */
    function abs(int256 n) internal pure returns (uint256) {
        unchecked {
            // Formula from the "Bit Twiddling Hacks" by Sean Eron Anderson.
            // Since `n` is a signed integer, the generated bytecode will use the SAR opcode to perform the right shift,
            // taking advantage of the most significant (or "sign" bit) in two's complement representation.
            // This opcode adds new most significant bits set to the value of the previous most significant bit. As a result,
            // the mask will either be `bytes32(0)` (if n is positive) or `~bytes32(0)` (if n is negative).
            int256 mask = n >> 255;

            // A `bytes32(0)` mask leaves the input unchanged, while a `~bytes32(0)` mask complements it.
            return uint256((n + mask) ^ mask);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/Panic.sol)

pragma solidity ^0.8.20;

/**
 * @dev Helper library for emitting standardized panic codes.
 *
 * ```solidity
 * contract Example {
 *      using Panic for uint256;
 *
 *      // Use any of the declared internal constants
 *      function foo() { Panic.GENERIC.panic(); }
 *
 *      // Alternatively
 *      function foo() { Panic.panic(Panic.GENERIC); }
 * }
 * ```
 *
 * Follows the list from https://github.com/ethereum/solidity/blob/v0.8.24/libsolutil/ErrorCodes.h[libsolutil].
 *
 * _Available since v5.1._
 */
// slither-disable-next-line unused-state
library Panic {
    /// @dev generic / unspecified error
    uint256 internal constant GENERIC = 0x00;
    /// @dev used by the assert() builtin
    uint256 internal constant ASSERT = 0x01;
    /// @dev arithmetic underflow or overflow
    uint256 internal constant UNDER_OVERFLOW = 0x11;
    /// @dev division or modulo by zero
    uint256 internal constant DIVISION_BY_ZERO = 0x12;
    /// @dev enum conversion error
    uint256 internal constant ENUM_CONVERSION_ERROR = 0x21;
    /// @dev invalid encoding in storage
    uint256 internal constant STORAGE_ENCODING_ERROR = 0x22;
    /// @dev empty array pop
    uint256 internal constant EMPTY_ARRAY_POP = 0x31;
    /// @dev array out of bounds access
    uint256 internal constant ARRAY_OUT_OF_BOUNDS = 0x32;
    /// @dev resource error (too large allocation or too large array)
    uint256 internal constant RESOURCE_ERROR = 0x41;
    /// @dev calling invalid internal function
    uint256 internal constant INVALID_INTERNAL_FUNCTION = 0x51;

    /// @dev Reverts with a panic code. Recommended to use with
    /// the internal constants with predefined codes.
    function panic(uint256 code) internal pure {
        assembly ("memory-safe") {
            mstore(0x00, 0x4e487b71)
            mstore(0x20, code)
            revert(0x1c, 0x24)
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.3.0) (utils/ShortStrings.sol)

pragma solidity ^0.8.20;

import {StorageSlot} from "./StorageSlot.sol";

// | string  | 0xAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA   |
// | length  | 0x                                                              BB |
type ShortString is bytes32;

/**
 * @dev This library provides functions to convert short memory strings
 * into a `ShortString` type that can be used as an immutable variable.
 *
 * Strings of arbitrary length can be optimized using this library if
 * they are short enough (up to 31 bytes) by packing them with their
 * length (1 byte) in a single EVM word (32 bytes). Additionally, a
 * fallback mechanism can be used for every other case.
 *
 * Usage example:
 *
 * ```solidity
 * contract Named {
 *     using ShortStrings for *;
 *
 *     ShortString private immutable _name;
 *     string private _nameFallback;
 *
 *     constructor(string memory contractName) {
 *         _name = contractName.toShortStringWithFallback(_nameFallback);
 *     }
 *
 *     function name() external view returns (string memory) {
 *         return _name.toStringWithFallback(_nameFallback);
 *     }
 * }
 * ```
 */
library ShortStrings {
    // Used as an identifier for strings longer than 31 bytes.
    bytes32 private constant FALLBACK_SENTINEL = 0x00000000000000000000000000000000000000000000000000000000000000FF;

    error StringTooLong(string str);
    error InvalidShortString();

    /**
     * @dev Encode a string of at most 31 chars into a `ShortString`.
     *
     * This will trigger a `StringTooLong` error is the input string is too long.
     */
    function toShortString(string memory str) internal pure returns (ShortString) {
        bytes memory bstr = bytes(str);
        if (bstr.length > 31) {
            revert StringTooLong(str);
        }
        return ShortString.wrap(bytes32(uint256(bytes32(bstr)) | bstr.length));
    }

    /**
     * @dev Decode a `ShortString` back to a "normal" string.
     */
    function toString(ShortString sstr) internal pure returns (string memory) {
        uint256 len = byteLength(sstr);
        // using `new string(len)` would work locally but is not memory safe.
        string memory str = new string(32);
        assembly ("memory-safe") {
            mstore(str, len)
            mstore(add(str, 0x20), sstr)
        }
        return str;
    }

    /**
     * @dev Return the length of a `ShortString`.
     */
    function byteLength(ShortString sstr) internal pure returns (uint256) {
        uint256 result = uint256(ShortString.unwrap(sstr)) & 0xFF;
        if (result > 31) {
            revert InvalidShortString();
        }
        return result;
    }

    /**
     * @dev Encode a string into a `ShortString`, or write it to storage if it is too long.
     */
    function toShortStringWithFallback(string memory value, string storage store) internal returns (ShortString) {
        if (bytes(value).length < 32) {
            return toShortString(value);
        } else {
            StorageSlot.getStringSlot(store).value = value;
            return ShortString.wrap(FALLBACK_SENTINEL);
        }
    }

    /**
     * @dev Decode a string that was encoded to `ShortString` or written to storage using {toShortStringWithFallback}.
     */
    function toStringWithFallback(ShortString value, string storage store) internal pure returns (string memory) {
        if (ShortString.unwrap(value) != FALLBACK_SENTINEL) {
            return toString(value);
        } else {
            return store;
        }
    }

    /**
     * @dev Return the length of a string that was encoded to `ShortString` or written to storage using
     * {toShortStringWithFallback}.
     *
     * WARNING: This will return the "byte length" of the string. This may not reflect the actual length in terms of
     * actual characters as the UTF-8 encoding of a single character can span over multiple bytes.
     */
    function byteLengthWithFallback(ShortString value, string storage store) internal view returns (uint256) {
        if (ShortString.unwrap(value) != FALLBACK_SENTINEL) {
            return byteLength(value);
        } else {
            return bytes(store).length;
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/StorageSlot.sol)
// This file was procedurally generated from scripts/generate/templates/StorageSlot.js.

pragma solidity ^0.8.20;

/**
 * @dev Library for reading and writing primitive types to specific storage slots.
 *
 * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
 * This library helps with reading and writing to such slots without the need for inline assembly.
 *
 * The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
 *
 * Example usage to set ERC-1967 implementation slot:
 * ```solidity
 * contract ERC1967 {
 *     // Define the slot. Alternatively, use the SlotDerivation library to derive the slot.
 *     bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
 *
 *     function _getImplementation() internal view returns (address) {
 *         return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
 *     }
 *
 *     function _setImplementation(address newImplementation) internal {
 *         require(newImplementation.code.length > 0);
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 *
 * TIP: Consider using this library along with {SlotDerivation}.
 */
library StorageSlot {
    struct AddressSlot {
        address value;
    }

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 value;
    }

    struct Int256Slot {
        int256 value;
    }

    struct StringSlot {
        string value;
    }

    struct BytesSlot {
        bytes value;
    }

    /**
     * @dev Returns an `AddressSlot` with member `value` located at `slot`.
     */
    function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
        assembly ("memory-safe") {
            r.slot := slot
        }
    }

    /**
     * @dev Returns a `BooleanSlot` with member `value` located at `slot`.
     */
    function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
        assembly ("memory-safe") {
            r.slot := slot
        }
    }

    /**
     * @dev Returns a `Bytes32Slot` with member `value` located at `slot`.
     */
    function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
        assembly ("memory-safe") {
            r.slot := slot
        }
    }

    /**
     * @dev Returns a `Uint256Slot` with member `value` located at `slot`.
     */
    function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
        assembly ("memory-safe") {
            r.slot := slot
        }
    }

    /**
     * @dev Returns a `Int256Slot` with member `value` located at `slot`.
     */
    function getInt256Slot(bytes32 slot) internal pure returns (Int256Slot storage r) {
        assembly ("memory-safe") {
            r.slot := slot
        }
    }

    /**
     * @dev Returns a `StringSlot` with member `value` located at `slot`.
     */
    function getStringSlot(bytes32 slot) internal pure returns (StringSlot storage r) {
        assembly ("memory-safe") {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `StringSlot` representation of the string storage pointer `store`.
     */
    function getStringSlot(string storage store) internal pure returns (StringSlot storage r) {
        assembly ("memory-safe") {
            r.slot := store.slot
        }
    }

    /**
     * @dev Returns a `BytesSlot` with member `value` located at `slot`.
     */
    function getBytesSlot(bytes32 slot) internal pure returns (BytesSlot storage r) {
        assembly ("memory-safe") {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `BytesSlot` representation of the bytes storage pointer `store`.
     */
    function getBytesSlot(bytes storage store) internal pure returns (BytesSlot storage r) {
        assembly ("memory-safe") {
            r.slot := store.slot
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (utils/Strings.sol)

pragma solidity ^0.8.20;

import {Math} from "./math/Math.sol";
import {SafeCast} from "./math/SafeCast.sol";
import {SignedMath} from "./math/SignedMath.sol";

/**
 * @dev String operations.
 */
library Strings {
    using SafeCast for *;

    bytes16 private constant HEX_DIGITS = "0123456789abcdef";
    uint8 private constant ADDRESS_LENGTH = 20;
    uint256 private constant SPECIAL_CHARS_LOOKUP =
        (1 << 0x08) | // backspace
            (1 << 0x09) | // tab
            (1 << 0x0a) | // newline
            (1 << 0x0c) | // form feed
            (1 << 0x0d) | // carriage return
            (1 << 0x22) | // double quote
            (1 << 0x5c); // backslash

    /**
     * @dev The `value` string doesn't fit in the specified `length`.
     */
    error StringsInsufficientHexLength(uint256 value, uint256 length);

    /**
     * @dev The string being parsed contains characters that are not in scope of the given base.
     */
    error StringsInvalidChar();

    /**
     * @dev The string being parsed is not a properly formatted address.
     */
    error StringsInvalidAddressFormat();

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        unchecked {
            uint256 length = Math.log10(value) + 1;
            string memory buffer = new string(length);
            uint256 ptr;
            assembly ("memory-safe") {
                ptr := add(add(buffer, 0x20), length)
            }
            while (true) {
                ptr--;
                assembly ("memory-safe") {
                    mstore8(ptr, byte(mod(value, 10), HEX_DIGITS))
                }
                value /= 10;
                if (value == 0) break;
            }
            return buffer;
        }
    }

    /**
     * @dev Converts a `int256` to its ASCII `string` decimal representation.
     */
    function toStringSigned(int256 value) internal pure returns (string memory) {
        return string.concat(value < 0 ? "-" : "", toString(SignedMath.abs(value)));
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        unchecked {
            return toHexString(value, Math.log256(value) + 1);
        }
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        uint256 localValue = value;
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = HEX_DIGITS[localValue & 0xf];
            localValue >>= 4;
        }
        if (localValue != 0) {
            revert StringsInsufficientHexLength(value, length);
        }
        return string(buffer);
    }

    /**
     * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal
     * representation.
     */
    function toHexString(address addr) internal pure returns (string memory) {
        return toHexString(uint256(uint160(addr)), ADDRESS_LENGTH);
    }

    /**
     * @dev Converts an `address` with fixed length of 20 bytes to its checksummed ASCII `string` hexadecimal
     * representation, according to EIP-55.
     */
    function toChecksumHexString(address addr) internal pure returns (string memory) {
        bytes memory buffer = bytes(toHexString(addr));

        // hash the hex part of buffer (skip length + 2 bytes, length 40)
        uint256 hashValue;
        assembly ("memory-safe") {
            hashValue := shr(96, keccak256(add(buffer, 0x22), 40))
        }

        for (uint256 i = 41; i > 1; --i) {
            // possible values for buffer[i] are 48 (0) to 57 (9) and 97 (a) to 102 (f)
            if (hashValue & 0xf > 7 && uint8(buffer[i]) > 96) {
                // case shift by xoring with 0x20
                buffer[i] ^= 0x20;
            }
            hashValue >>= 4;
        }
        return string(buffer);
    }

    /**
     * @dev Returns true if the two strings are equal.
     */
    function equal(string memory a, string memory b) internal pure returns (bool) {
        return bytes(a).length == bytes(b).length && keccak256(bytes(a)) == keccak256(bytes(b));
    }

    /**
     * @dev Parse a decimal string and returns the value as a `uint256`.
     *
     * Requirements:
     * - The string must be formatted as `[0-9]*`
     * - The result must fit into an `uint256` type
     */
    function parseUint(string memory input) internal pure returns (uint256) {
        return parseUint(input, 0, bytes(input).length);
    }

    /**
     * @dev Variant of {parseUint-string} that parses a substring of `input` located between position `begin` (included) and
     * `end` (excluded).
     *
     * Requirements:
     * - The substring must be formatted as `[0-9]*`
     * - The result must fit into an `uint256` type
     */
    function parseUint(string memory input, uint256 begin, uint256 end) internal pure returns (uint256) {
        (bool success, uint256 value) = tryParseUint(input, begin, end);
        if (!success) revert StringsInvalidChar();
        return value;
    }

    /**
     * @dev Variant of {parseUint-string} that returns false if the parsing fails because of an invalid character.
     *
     * NOTE: This function will revert if the result does not fit in a `uint256`.
     */
    function tryParseUint(string memory input) internal pure returns (bool success, uint256 value) {
        return _tryParseUintUncheckedBounds(input, 0, bytes(input).length);
    }

    /**
     * @dev Variant of {parseUint-string-uint256-uint256} that returns false if the parsing fails because of an invalid
     * character.
     *
     * NOTE: This function will revert if the result does not fit in a `uint256`.
     */
    function tryParseUint(
        string memory input,
        uint256 begin,
        uint256 end
    ) internal pure returns (bool success, uint256 value) {
        if (end > bytes(input).length || begin > end) return (false, 0);
        return _tryParseUintUncheckedBounds(input, begin, end);
    }

    /**
     * @dev Implementation of {tryParseUint-string-uint256-uint256} that does not check bounds. Caller should make sure that
     * `begin <= end <= input.length`. Other inputs would result in undefined behavior.
     */
    function _tryParseUintUncheckedBounds(
        string memory input,
        uint256 begin,
        uint256 end
    ) private pure returns (bool success, uint256 value) {
        bytes memory buffer = bytes(input);

        uint256 result = 0;
        for (uint256 i = begin; i < end; ++i) {
            uint8 chr = _tryParseChr(bytes1(_unsafeReadBytesOffset(buffer, i)));
            if (chr > 9) return (false, 0);
            result *= 10;
            result += chr;
        }
        return (true, result);
    }

    /**
     * @dev Parse a decimal string and returns the value as a `int256`.
     *
     * Requirements:
     * - The string must be formatted as `[-+]?[0-9]*`
     * - The result must fit in an `int256` type.
     */
    function parseInt(string memory input) internal pure returns (int256) {
        return parseInt(input, 0, bytes(input).length);
    }

    /**
     * @dev Variant of {parseInt-string} that parses a substring of `input` located between position `begin` (included) and
     * `end` (excluded).
     *
     * Requirements:
     * - The substring must be formatted as `[-+]?[0-9]*`
     * - The result must fit in an `int256` type.
     */
    function parseInt(string memory input, uint256 begin, uint256 end) internal pure returns (int256) {
        (bool success, int256 value) = tryParseInt(input, begin, end);
        if (!success) revert StringsInvalidChar();
        return value;
    }

    /**
     * @dev Variant of {parseInt-string} that returns false if the parsing fails because of an invalid character or if
     * the result does not fit in a `int256`.
     *
     * NOTE: This function will revert if the absolute value of the result does not fit in a `uint256`.
     */
    function tryParseInt(string memory input) internal pure returns (bool success, int256 value) {
        return _tryParseIntUncheckedBounds(input, 0, bytes(input).length);
    }

    uint256 private constant ABS_MIN_INT256 = 2 ** 255;

    /**
     * @dev Variant of {parseInt-string-uint256-uint256} that returns false if the parsing fails because of an invalid
     * character or if the result does not fit in a `int256`.
     *
     * NOTE: This function will revert if the absolute value of the result does not fit in a `uint256`.
     */
    function tryParseInt(
        string memory input,
        uint256 begin,
        uint256 end
    ) internal pure returns (bool success, int256 value) {
        if (end > bytes(input).length || begin > end) return (false, 0);
        return _tryParseIntUncheckedBounds(input, begin, end);
    }

    /**
     * @dev Implementation of {tryParseInt-string-uint256-uint256} that does not check bounds. Caller should make sure that
     * `begin <= end <= input.length`. Other inputs would result in undefined behavior.
     */
    function _tryParseIntUncheckedBounds(
        string memory input,
        uint256 begin,
        uint256 end
    ) private pure returns (bool success, int256 value) {
        bytes memory buffer = bytes(input);

        // Check presence of a negative sign.
        bytes1 sign = begin == end ? bytes1(0) : bytes1(_unsafeReadBytesOffset(buffer, begin)); // don't do out-of-bound (possibly unsafe) read if sub-string is empty
        bool positiveSign = sign == bytes1("+");
        bool negativeSign = sign == bytes1("-");
        uint256 offset = (positiveSign || negativeSign).toUint();

        (bool absSuccess, uint256 absValue) = tryParseUint(input, begin + offset, end);

        if (absSuccess && absValue < ABS_MIN_INT256) {
            return (true, negativeSign ? -int256(absValue) : int256(absValue));
        } else if (absSuccess && negativeSign && absValue == ABS_MIN_INT256) {
            return (true, type(int256).min);
        } else return (false, 0);
    }

    /**
     * @dev Parse a hexadecimal string (with or without "0x" prefix), and returns the value as a `uint256`.
     *
     * Requirements:
     * - The string must be formatted as `(0x)?[0-9a-fA-F]*`
     * - The result must fit in an `uint256` type.
     */
    function parseHexUint(string memory input) internal pure returns (uint256) {
        return parseHexUint(input, 0, bytes(input).length);
    }

    /**
     * @dev Variant of {parseHexUint-string} that parses a substring of `input` located between position `begin` (included) and
     * `end` (excluded).
     *
     * Requirements:
     * - The substring must be formatted as `(0x)?[0-9a-fA-F]*`
     * - The result must fit in an `uint256` type.
     */
    function parseHexUint(string memory input, uint256 begin, uint256 end) internal pure returns (uint256) {
        (bool success, uint256 value) = tryParseHexUint(input, begin, end);
        if (!success) revert StringsInvalidChar();
        return value;
    }

    /**
     * @dev Variant of {parseHexUint-string} that returns false if the parsing fails because of an invalid character.
     *
     * NOTE: This function will revert if the result does not fit in a `uint256`.
     */
    function tryParseHexUint(string memory input) internal pure returns (bool success, uint256 value) {
        return _tryParseHexUintUncheckedBounds(input, 0, bytes(input).length);
    }

    /**
     * @dev Variant of {parseHexUint-string-uint256-uint256} that returns false if the parsing fails because of an
     * invalid character.
     *
     * NOTE: This function will revert if the result does not fit in a `uint256`.
     */
    function tryParseHexUint(
        string memory input,
        uint256 begin,
        uint256 end
    ) internal pure returns (bool success, uint256 value) {
        if (end > bytes(input).length || begin > end) return (false, 0);
        return _tryParseHexUintUncheckedBounds(input, begin, end);
    }

    /**
     * @dev Implementation of {tryParseHexUint-string-uint256-uint256} that does not check bounds. Caller should make sure that
     * `begin <= end <= input.length`. Other inputs would result in undefined behavior.
     */
    function _tryParseHexUintUncheckedBounds(
        string memory input,
        uint256 begin,
        uint256 end
    ) private pure returns (bool success, uint256 value) {
        bytes memory buffer = bytes(input);

        // skip 0x prefix if present
        bool hasPrefix = (end > begin + 1) && bytes2(_unsafeReadBytesOffset(buffer, begin)) == bytes2("0x"); // don't do out-of-bound (possibly unsafe) read if sub-string is empty
        uint256 offset = hasPrefix.toUint() * 2;

        uint256 result = 0;
        for (uint256 i = begin + offset; i < end; ++i) {
            uint8 chr = _tryParseChr(bytes1(_unsafeReadBytesOffset(buffer, i)));
            if (chr > 15) return (false, 0);
            result *= 16;
            unchecked {
                // Multiplying by 16 is equivalent to a shift of 4 bits (with additional overflow check).
                // This guarantees that adding a value < 16 will not cause an overflow, hence the unchecked.
                result += chr;
            }
        }
        return (true, result);
    }

    /**
     * @dev Parse a hexadecimal string (with or without "0x" prefix), and returns the value as an `address`.
     *
     * Requirements:
     * - The string must be formatted as `(0x)?[0-9a-fA-F]{40}`
     */
    function parseAddress(string memory input) internal pure returns (address) {
        return parseAddress(input, 0, bytes(input).length);
    }

    /**
     * @dev Variant of {parseAddress-string} that parses a substring of `input` located between position `begin` (included) and
     * `end` (excluded).
     *
     * Requirements:
     * - The substring must be formatted as `(0x)?[0-9a-fA-F]{40}`
     */
    function parseAddress(string memory input, uint256 begin, uint256 end) internal pure returns (address) {
        (bool success, address value) = tryParseAddress(input, begin, end);
        if (!success) revert StringsInvalidAddressFormat();
        return value;
    }

    /**
     * @dev Variant of {parseAddress-string} that returns false if the parsing fails because the input is not a properly
     * formatted address. See {parseAddress-string} requirements.
     */
    function tryParseAddress(string memory input) internal pure returns (bool success, address value) {
        return tryParseAddress(input, 0, bytes(input).length);
    }

    /**
     * @dev Variant of {parseAddress-string-uint256-uint256} that returns false if the parsing fails because input is not a properly
     * formatted address. See {parseAddress-string-uint256-uint256} requirements.
     */
    function tryParseAddress(
        string memory input,
        uint256 begin,
        uint256 end
    ) internal pure returns (bool success, address value) {
        if (end > bytes(input).length || begin > end) return (false, address(0));

        bool hasPrefix = (end > begin + 1) && bytes2(_unsafeReadBytesOffset(bytes(input), begin)) == bytes2("0x"); // don't do out-of-bound (possibly unsafe) read if sub-string is empty
        uint256 expectedLength = 40 + hasPrefix.toUint() * 2;

        // check that input is the correct length
        if (end - begin == expectedLength) {
            // length guarantees that this does not overflow, and value is at most type(uint160).max
            (bool s, uint256 v) = _tryParseHexUintUncheckedBounds(input, begin, end);
            return (s, address(uint160(v)));
        } else {
            return (false, address(0));
        }
    }

    function _tryParseChr(bytes1 chr) private pure returns (uint8) {
        uint8 value = uint8(chr);

        // Try to parse `chr`:
        // - Case 1: [0-9]
        // - Case 2: [a-f]
        // - Case 3: [A-F]
        // - otherwise not supported
        unchecked {
            if (value > 47 && value < 58) value -= 48;
            else if (value > 96 && value < 103) value -= 87;
            else if (value > 64 && value < 71) value -= 55;
            else return type(uint8).max;
        }

        return value;
    }

    /**
     * @dev Escape special characters in JSON strings. This can be useful to prevent JSON injection in NFT metadata.
     *
     * WARNING: This function should only be used in double quoted JSON strings. Single quotes are not escaped.
     *
     * NOTE: This function escapes all unicode characters, and not just the ones in ranges defined in section 2.5 of
     * RFC-4627 (U+0000 to U+001F, U+0022 and U+005C). ECMAScript's `JSON.parse` does recover escaped unicode
     * characters that are not in this range, but other tooling may provide different results.
     */
    function escapeJSON(string memory input) internal pure returns (string memory) {
        bytes memory buffer = bytes(input);
        bytes memory output = new bytes(2 * buffer.length); // worst case scenario
        uint256 outputLength = 0;

        for (uint256 i; i < buffer.length; ++i) {
            bytes1 char = bytes1(_unsafeReadBytesOffset(buffer, i));
            if (((SPECIAL_CHARS_LOOKUP & (1 << uint8(char))) != 0)) {
                output[outputLength++] = "\\";
                if (char == 0x08) output[outputLength++] = "b";
                else if (char == 0x09) output[outputLength++] = "t";
                else if (char == 0x0a) output[outputLength++] = "n";
                else if (char == 0x0c) output[outputLength++] = "f";
                else if (char == 0x0d) output[outputLength++] = "r";
                else if (char == 0x5c) output[outputLength++] = "\\";
                else if (char == 0x22) {
                    // solhint-disable-next-line quotes
                    output[outputLength++] = '"';
                }
            } else {
                output[outputLength++] = char;
            }
        }
        // write the actual length and deallocate unused memory
        assembly ("memory-safe") {
            mstore(output, outputLength)
            mstore(0x40, add(output, shl(5, shr(5, add(outputLength, 63)))))
        }

        return string(output);
    }

    /**
     * @dev Reads a bytes32 from a bytes array without bounds checking.
     *
     * NOTE: making this function internal would mean it could be used with memory unsafe offset, and marking the
     * assembly block as such would prevent some optimizations.
     */
    function _unsafeReadBytesOffset(bytes memory buffer, uint256 offset) private pure returns (bytes32 value) {
        // This is not memory safe in the general case, but all calls to this private function are within bounds.
        assembly ("memory-safe") {
            value := mload(add(add(buffer, 0x20), offset))
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

import "@openzeppelin/contracts-upgradeable/access/AccessControlUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/PausableUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/ReentrancyGuardUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
import "../libraries/Constants.sol";
import "../libraries/Errors.sol" ;

/**
 * @title AccessControl
 * @dev Role-based access control system for the Cross-Chain NFT Trading Platform
 * @author Blocklabs Studio
 */
contract AccessControl is 
    Initializable,
    AccessControlUpgradeable,
    PausableUpgradeable,
    ReentrancyGuardUpgradeable
{
    
    // ============ EVENTS ============
    
    /**
     * @dev Emitted when emergency pause is activated
     * @param admin The admin who activated the pause
     * @param timestamp The timestamp of activation
     */
    event EmergencyPauseActivated(address indexed admin, uint256 timestamp);
    
    /**
     * @dev Emitted when emergency pause is deactivated
     * @param admin The admin who deactivated the pause
     * @param timestamp The timestamp of deactivation
     */
    event EmergencyPauseDeactivated(address indexed admin, uint256 timestamp);
    
    /**
     * @dev Emitted when a role is granted with additional context
     * @param role The role that was granted
     * @param account The account that received the role
     * @param sender The account that granted the role
     * @param timestamp The timestamp of the grant
     */
    event RoleGrantedWithContext(
        bytes32 indexed role,
        address indexed account,
        address indexed sender,
        uint256 timestamp
    );
    
    /**
     * @dev Emitted when a role is revoked with additional context
     * @param role The role that was revoked
     * @param account The account that lost the role
     * @param sender The account that revoked the role
     * @param timestamp The timestamp of the revocation
     */
    event RoleRevokedWithContext(
        bytes32 indexed role,
        address indexed account,
        address indexed sender,
        uint256 timestamp
    );
    
    // ============ STATE VARIABLES ============
    
    /// @dev Mapping to track role assignment timestamps
    mapping(bytes32 => mapping(address => uint256)) public roleAssignmentTimestamps;
    
    /// @dev Mapping to track emergency pause history
    mapping(uint256 => bool) public emergencyPauseHistory;
    
    /// @dev Counter for emergency pause events
    uint256 public emergencyPauseCount;
    
    /// @dev Timestamp of contract deployment
    uint256 public deploymentTimestamp;
    
    /// @dev Mapping to track role member counts
    mapping(bytes32 => uint256) private _roleMemberCounts;
    
    /// @dev Mapping to track if an account has a specific role (for counting)
    mapping(bytes32 => mapping(address => bool)) private _roleMembers;
    
    // ============ MODIFIERS ============
    
    /**
     * @dev Modifier to check if caller has admin role
     */
    modifier onlyAdmin() {
        if (!hasRole(Constants.ADMIN_ROLE, msg.sender)) {
            revert CustomErrors.UnauthorizedAccess(msg.sender, Constants.ADMIN_ROLE);
        }
        _;
    }
    
    /**
     * @dev Modifier to check if caller has project admin role
     */
    modifier onlyProjectAdmin() {
        if (!hasRole(Constants.PROJECT_ADMIN_ROLE, msg.sender) && 
            !hasRole(Constants.ADMIN_ROLE, msg.sender)) {
            revert CustomErrors.UnauthorizedAccess(msg.sender, Constants.PROJECT_ADMIN_ROLE);
        }
        _;
    }
    
    /**
     * @dev Modifier to check if caller has fee manager role
     */
    modifier onlyFeeManager() {
        if (!hasRole(Constants.FEE_MANAGER_ROLE, msg.sender) && 
            !hasRole(Constants.ADMIN_ROLE, msg.sender)) {
            revert CustomErrors.UnauthorizedAccess(msg.sender, Constants.FEE_MANAGER_ROLE);
        }
        _;
    }
    
    /**
     * @dev Modifier to check if caller has emergency role
     */
    modifier onlyEmergency() {
        if (!hasRole(Constants.EMERGENCY_ROLE, msg.sender) && 
            !hasRole(Constants.ADMIN_ROLE, msg.sender)) {
            revert CustomErrors.UnauthorizedAccess(msg.sender, Constants.EMERGENCY_ROLE);
        }
        _;
    }
    
    /**
     * @dev Modifier to check if caller has upgrader role
     */
    modifier onlyUpgrader() {
        if (!hasRole(Constants.UPGRADER_ROLE, msg.sender) && 
            !hasRole(Constants.ADMIN_ROLE, msg.sender)) {
            revert CustomErrors.UnauthorizedAccess(msg.sender, Constants.UPGRADER_ROLE);
        }
        _;
    }
    
    /**
     * @dev Modifier to ensure contract is not paused
     */
    modifier whenNotPausedCustom() {
        if (paused()) {
            revert CustomErrors.ContractPaused();
        }
        _;
    }
    
    // ============ INITIALIZATION ============
    
    /**
     * @dev Initializes the AccessControl contract
     * @param initialAdmin The initial admin address
     */
    function initialize(address initialAdmin) public initializer {
        if (initialAdmin == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        __AccessControl_init();
        __Pausable_init();
        __ReentrancyGuard_init();
        
        // Set up role hierarchy
        _setRoleAdmin(Constants.ADMIN_ROLE, Constants.ADMIN_ROLE);
        _setRoleAdmin(Constants.PROJECT_ADMIN_ROLE, Constants.ADMIN_ROLE);
        _setRoleAdmin(Constants.FEE_MANAGER_ROLE, Constants.ADMIN_ROLE);
        _setRoleAdmin(Constants.EMERGENCY_ROLE, Constants.ADMIN_ROLE);
        _setRoleAdmin(Constants.UPGRADER_ROLE, Constants.ADMIN_ROLE);
        
        // Grant initial admin role
        _grantRoleWithTracking(Constants.ADMIN_ROLE, initialAdmin);
        
        // Set deployment timestamp
        deploymentTimestamp = block.timestamp;
    }
    
    // ============ ROLE MANAGEMENT FUNCTIONS ============
    
    /**
     * @dev Grants a role to an account with additional validation
     * @param role The role to grant
     * @param account The account to grant the role to
     */
    function grantRoleWithValidation(bytes32 role, address account) 
        external 
        onlyAdmin 
        nonReentrant 
    {
        if (account == address(0)) {
            revert CustomErrors.InvalidRoleRecipient(account);
        }
        
        // Additional validation for sensitive roles
        if (role == Constants.ADMIN_ROLE && account == msg.sender) {
            revert CustomErrors.RoleOperationFailed(role, account);
        }
        
        _grantRoleWithTracking(role, account);
        roleAssignmentTimestamps[role][account] = block.timestamp;
        
        emit RoleGrantedWithContext(role, account, msg.sender, block.timestamp);
    }
    
    /**
     * @dev Revokes a role from an account with additional validation
     * @param role The role to revoke
     * @param account The account to revoke the role from
     */
    function revokeRoleWithValidation(bytes32 role, address account) 
        external 
        onlyAdmin 
        nonReentrant 
    {
        // Prevent revoking admin role from the last admin
        if (role == Constants.ADMIN_ROLE) {
            uint256 adminCount = _roleMemberCounts[Constants.ADMIN_ROLE];
            if (adminCount <= 1) {
                revert CustomErrors.RoleOperationFailed(role, account);
            }
        }
        
        _revokeRoleWithTracking(role, account);
        roleAssignmentTimestamps[role][account] = 0;
        
        emit RoleRevokedWithContext(role, account, msg.sender, block.timestamp);
    }
    
    /**
     * @dev Batch grants multiple roles to multiple accounts
     * @param roles Array of roles to grant
     * @param accounts Array of accounts to grant roles to
     */
    function batchGrantRoles(bytes32[] calldata roles, address[] calldata accounts) 
        external 
        onlyAdmin 
        nonReentrant 
    {
        if (roles.length != accounts.length) {
            revert CustomErrors.ArrayLengthMismatch(roles.length, accounts.length);
        }
        
        if (roles.length == 0) {
            revert CustomErrors.EmptyArray();
        }
        
        for (uint256 i = 0; i < roles.length; i++) {
            if (accounts[i] == address(0)) {
                revert CustomErrors.InvalidRoleRecipient(accounts[i]);
            }
            
            _grantRoleWithTracking(roles[i], accounts[i]);
            roleAssignmentTimestamps[roles[i]][accounts[i]] = block.timestamp;
            
            emit RoleGrantedWithContext(roles[i], accounts[i], msg.sender, block.timestamp);
        }
    }
    
    /**
     * @dev Batch revokes multiple roles from multiple accounts
     * @param roles Array of roles to revoke
     * @param accounts Array of accounts to revoke roles from
     */
    function batchRevokeRoles(bytes32[] calldata roles, address[] calldata accounts) 
        external 
        onlyAdmin 
        nonReentrant 
    {
        if (roles.length != accounts.length) {
            revert CustomErrors.ArrayLengthMismatch(roles.length, accounts.length);
        }
        
        if (roles.length == 0) {
            revert CustomErrors.EmptyArray();
        }
        
        for (uint256 i = 0; i < roles.length; i++) {
            // Check admin role constraint
            if (roles[i] == Constants.ADMIN_ROLE) {
                uint256 adminCount = _roleMemberCounts[Constants.ADMIN_ROLE];
                if (adminCount <= 1) {
                    revert CustomErrors.RoleOperationFailed(roles[i], accounts[i]);
                }
            }
            
            _revokeRoleWithTracking(roles[i], accounts[i]);
            roleAssignmentTimestamps[roles[i]][accounts[i]] = 0;
            
            emit RoleRevokedWithContext(roles[i], accounts[i], msg.sender, block.timestamp);
        }
    }
    
    // ============ EMERGENCY FUNCTIONS ============
    
    /**
     * @dev Activates emergency pause
     */
    function emergencyPause() external onlyEmergency {
        _pause();
        emergencyPauseCount++;
        emergencyPauseHistory[emergencyPauseCount] = true;
        
        emit EmergencyPauseActivated(msg.sender, block.timestamp);
    }
    
    /**
     * @dev Deactivates emergency pause
     */
    function emergencyUnpause() external onlyAdmin {
        _unpause();
        
        emit EmergencyPauseDeactivated(msg.sender, block.timestamp);
    }
    
    // ============ VIEW FUNCTIONS ============
    
    /**
     * @dev Gets the timestamp when a role was assigned to an account
     * @param role The role to check
     * @param account The account to check
     * @return timestamp The assignment timestamp (0 if not assigned)
     */
    function getRoleAssignmentTimestamp(bytes32 role, address account) 
        external 
        view 
        returns (uint256 timestamp) 
    {
        return roleAssignmentTimestamps[role][account];
    }
    
    /**
     * @dev Checks if an account has any admin privileges
     * @param account The account to check
     * @return hasAdminPrivileges Whether the account has admin privileges
     */
    function hasAdminPrivileges(address account) external view returns (bool) {
        return hasRole(Constants.ADMIN_ROLE, account) ||
               hasRole(Constants.PROJECT_ADMIN_ROLE, account) ||
               hasRole(Constants.FEE_MANAGER_ROLE, account) ||
               hasRole(Constants.EMERGENCY_ROLE, account) ||
               hasRole(Constants.UPGRADER_ROLE, account);
    }
    
    /**
     * @dev Gets all roles assigned to an account
     * @param account The account to check
     * @return roles Array of roles assigned to the account
     */
    function getAccountRoles(address account) external view returns (bytes32[] memory roles) {
        bytes32[] memory allRoles = new bytes32[](5);
        allRoles[0] = Constants.ADMIN_ROLE;
        allRoles[1] = Constants.PROJECT_ADMIN_ROLE;
        allRoles[2] = Constants.FEE_MANAGER_ROLE;
        allRoles[3] = Constants.EMERGENCY_ROLE;
        allRoles[4] = Constants.UPGRADER_ROLE;
        
        uint256 roleCount = 0;
        for (uint256 i = 0; i < allRoles.length; i++) {
            if (hasRole(allRoles[i], account)) {
                roleCount++;
            }
        }
        
        bytes32[] memory accountRoles = new bytes32[](roleCount);
        uint256 index = 0;
        for (uint256 i = 0; i < allRoles.length; i++) {
            if (hasRole(allRoles[i], account)) {
                accountRoles[index] = allRoles[i];
                index++;
            }
        }
        
        return accountRoles;
    }
    
    /**
     * @dev Gets contract statistics
     * @return totalRoleAssignments Total number of role assignments
     * @return totalEmergencyPauses Total number of emergency pauses
     * @return contractAge Age of the contract in seconds
     */
    function getContractStats() 
        external 
        view 
        returns (
            uint256 totalRoleAssignments,
            uint256 totalEmergencyPauses,
            uint256 contractAge
        ) 
    {
        // Calculate total role assignments
        totalRoleAssignments = _roleMemberCounts[Constants.ADMIN_ROLE] +
                              _roleMemberCounts[Constants.PROJECT_ADMIN_ROLE] +
                              _roleMemberCounts[Constants.FEE_MANAGER_ROLE] +
                              _roleMemberCounts[Constants.EMERGENCY_ROLE] +
                              _roleMemberCounts[Constants.UPGRADER_ROLE];
        
        totalEmergencyPauses = emergencyPauseCount;
        contractAge = block.timestamp - deploymentTimestamp;
    }
    
    /**
     * @dev Checks if the contract is in a healthy state
     * @return isHealthy Whether the contract is healthy
     * @return issues Array of health issues (empty if healthy)
     */
    function checkContractHealth() 
        external 
        view 
        returns (bool isHealthy, string[] memory issues) 
    {
        string[] memory healthIssues = new string[](10);
        uint256 issueCount = 0;
        
        // Check if there's at least one admin
        if (_roleMemberCounts[Constants.ADMIN_ROLE] == 0) {
            healthIssues[issueCount] = "No admin accounts";
            issueCount++;
        }
        
        // Check if contract is paused for too long
        if (paused() && emergencyPauseCount > 5) {
            healthIssues[issueCount] = "Too many emergency pauses";
            issueCount++;
        }
        
        // Create result array with actual issues
        string[] memory actualIssues = new string[](issueCount);
        for (uint256 i = 0; i < issueCount; i++) {
            actualIssues[i] = healthIssues[i];
        }
        
        return (issueCount == 0, actualIssues);
    }
    
    // ============ INTERNAL FUNCTIONS ============
    
    /**
     * @dev Internal function to grant role with tracking
     */
    function _grantRoleWithTracking(bytes32 role, address account) internal {
        bool hadRole = hasRole(role, account);
        _grantRole(role, account);
        
        // Update role member tracking
        if (!hadRole) {
            _roleMembers[role][account] = true;
            _roleMemberCounts[role]++;
        }
    }
    
    /**
     * @dev Internal function to revoke role with tracking
     */
    function _revokeRoleWithTracking(bytes32 role, address account) internal {
        bool hadRole = hasRole(role, account);
        _revokeRole(role, account);
        
        // Update role member tracking
        if (hadRole) {
            _roleMembers[role][account] = false;
            if (_roleMemberCounts[role] > 0) {
                _roleMemberCounts[role]--;
            }
        }
    }
    
    /**
     * @dev Gets the number of accounts that have a specific role
     * @param role The role to count
     * @return count The number of accounts with the role
     */
    function getRoleMemberCount(bytes32 role) public view returns (uint256 count) {
        return _roleMemberCounts[role];
    }
    
    // ============ UPGRADE FUNCTIONS ============
    
    /**
     * @dev Authorizes contract upgrades (only upgraders can authorize)
     * @param newImplementation The new implementation address
     */
    function _authorizeUpgrade(address newImplementation) internal view onlyUpgrader {
        // Additional upgrade validation can be added here
        if (newImplementation == address(0)) {
            revert CustomErrors.InvalidUpgradeImplementation(newImplementation);
        }
    }
    
    /**
     * @dev Returns the version of the contract
     * @return version The contract version
     */
    function version() external pure returns (string memory) {
        return "1.0.0";
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts-upgradeable/utils/ReentrancyGuardUpgradeable.sol";
import "../interfaces/ICrossChainBridge.sol";
import "../libraries/DataStructures.sol";
import "../libraries/Constants.sol";
import "../libraries/Errors.sol";
import "../libraries/CrossChainLibrary.sol";
import "../core/AccessControl.sol";

/**
 * @title CrossChainBridge
 * @dev LayerZero V2 integration for cross-chain messaging
 * @author Blocklabs Studio
 */
contract CrossChainBridge is 
    Initializable,
    ReentrancyGuardUpgradeable,
    ICrossChainBridge
{
    
    // ============ STATE VARIABLES ============
    
    /// @dev Reference to the AccessControl contract
    AccessControl public accessControl;
    
    /// @dev LayerZero endpoints per chain
    mapping(uint256 => address) private _layerZeroEndpoints;
    
    /// @dev Trusted remote contracts per chain
    mapping(uint256 => address) private _trustedRemotes;
    
    /// @dev Default gas limits per chain
    mapping(uint256 => uint256) private _defaultGasLimits;
    
    /// @dev Chain enabled status
    mapping(uint256 => bool) private _chainEnabled;
    
    /// @dev Message status tracking
    mapping(bytes32 => MessageStatus) private _messageStatus;
    
    /// @dev Message retry tracking
    mapping(bytes32 => uint256) private _messageRetryCount;
    
    /// @dev Message last attempt timestamp
    mapping(bytes32 => uint256) private _messageLastAttempt;
    
    /// @dev Processed message hashes
    mapping(bytes32 => bool) private _processedMessages;
    
    /// @dev Supported chain IDs
    uint256[] private _supportedChains;
    
    /// @dev Bridge statistics
    uint256 public totalMessagesSent;
    uint256 public totalMessagesReceived;
    uint256 public totalGasUsed;
    
    /// @dev Emergency pause status
    bool private _emergencyPaused;
    
    // ============ STRUCTS ============
    
    struct MessageStatus {
        uint8 status;           // 0=pending, 1=delivered, 2=failed
        uint256 retryCount;     // Number of retry attempts
        uint256 lastAttempt;    // Timestamp of last attempt
    }
    
    // ============ ADDITIONAL EVENTS ============
    
    /**
     * @dev Emitted when emergency pause status changes
     * @param paused Whether the bridge is paused
     * @param pausedBy The address that changed the pause status
     */
    event EmergencyPauseStatusChanged(
        bool paused,
        address indexed pausedBy
    );
    
    // ============ MODIFIERS ============
    
    /**
     * @dev Modifier to ensure contract is not paused
     */
    modifier whenNotPaused() {
        if (accessControl.paused() || _emergencyPaused) {
            revert CustomErrors.ContractPaused();
        }
        _;
    }
    
    /**
     * @dev Modifier to check if caller has admin role
     */
    modifier onlyAdmin() {
        if (!accessControl.hasRole(Constants.ADMIN_ROLE, msg.sender)) {
            revert CustomErrors.UnauthorizedAccess(msg.sender, Constants.ADMIN_ROLE);
        }
        _;
    }
    
    /**
     * @dev Modifier to validate chain is supported
     */
    modifier validChain(uint256 chainId) {
        if (!_chainEnabled[chainId]) {
            revert CustomErrors.UnsupportedChainId(chainId);
        }
        _;
    }
    
    // ============ INITIALIZATION ============
    
    /**
     * @dev Initializes the CrossChainBridge contract
     * @param _accessControl Address of the AccessControl contract
     */
    function initialize(address _accessControl) public initializer {
        if (_accessControl == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        __ReentrancyGuard_init();
        
        accessControl = AccessControl(_accessControl);
        
        // Initialize supported chains
        _initializeSupportedChains();
    }
    
    // ============ CORE FUNCTIONS ============
    
    /**
     * @dev Sends a cross-chain message via LayerZero
     * @param destinationChain Target chain ID
     * @param payload Message payload to send
     * @param gasLimit Gas limit for execution on destination
     * @return messageHash Hash of the sent message
     */
    function sendMessage(
        uint256 destinationChain,
        bytes calldata payload,
        uint256 gasLimit
    ) external payable override nonReentrant whenNotPaused validChain(destinationChain) returns (bytes32 messageHash) {
        if (payload.length == 0) {
            revert CustomErrors.EmptyArray();
        }
        
        if (payload.length > Constants.MAX_LZ_PAYLOAD_SIZE) {
            revert CustomErrors.ValueOutOfRange(payload.length, 1, Constants.MAX_LZ_PAYLOAD_SIZE);
        }
        
        if (gasLimit < Constants.MIN_GAS_LIMIT || gasLimit > Constants.MAX_GAS_LIMIT) {
            revert CustomErrors.InsufficientGasLimit(gasLimit, Constants.MIN_GAS_LIMIT);
        }
        
        // Generate message hash
        messageHash = keccak256(abi.encodePacked(
            block.chainid,
            destinationChain,
            payload,
            block.timestamp,
            msg.sender
        ));
        
        // Estimate gas cost
        uint256 estimatedGas = estimateGas(destinationChain, payload);
        if (msg.value < estimatedGas) {
            revert CustomErrors.InsufficientCrossChainFee(msg.value, estimatedGas);
        }
        
        // Initialize message status
        _messageStatus[messageHash] = MessageStatus({
            status: 0, // pending
            retryCount: 0,
            lastAttempt: block.timestamp
        });
        
        // Send message through LayerZero (simplified implementation)
        uint256 gasUsed = _sendLayerZeroMessage(destinationChain, payload, gasLimit);
        
        totalMessagesSent++;
        totalGasUsed += gasUsed;
        
        emit MessageSent(destinationChain, messageHash, gasLimit, gasUsed);
        
        return messageHash;
    }
    
    /**
     * @dev Receives and processes a cross-chain message
     * @param sourceChain Source chain ID
     * @param payload Message payload received
     * @return success Whether message processing was successful
     */
    function receiveMessage(
        uint256 sourceChain,
        bytes calldata payload
    ) external override nonReentrant whenNotPaused returns (bool success) {
        // Validate source chain
        if (!_chainEnabled[sourceChain]) {
            revert CustomErrors.UnsupportedChainId(sourceChain);
        }
        
        // Generate message hash
        bytes32 messageHash = keccak256(abi.encodePacked(sourceChain, payload, block.timestamp));
        
        // Check if message already processed
        if (_processedMessages[messageHash]) {
            revert CustomErrors.DuplicateEntry(messageHash);
        }
        
        // Mark as processed
        _processedMessages[messageHash] = true;
        
        // Process the message
        success = _processReceivedMessage(sourceChain, payload);
        
        // Update statistics
        totalMessagesReceived++;
        
        emit MessageReceived(sourceChain, messageHash, success);
        
        return success;
    }
    
    /**
     * @dev Estimates gas cost for cross-chain message
     * @param destinationChain Target chain ID
     * @param payload Message payload
     * @return gasEstimate Estimated gas cost in native token
     */
    function estimateGas(
        uint256 destinationChain,
        bytes calldata payload
    ) public view override validChain(destinationChain) returns (uint256 gasEstimate) {
        // Base gas cost
        uint256 baseGas = _defaultGasLimits[destinationChain];
        if (baseGas == 0) {
            baseGas = Constants.DEFAULT_GAS_LIMIT;
        }
        
        // Add payload processing cost
        uint256 payloadGas = payload.length * 100; // 100 gas per byte
        
        // Add LayerZero overhead
        uint256 layerZeroGas = Constants.LZ_GAS_BUFFER;
        
        // Calculate total with buffer
        gasEstimate = baseGas + payloadGas + layerZeroGas;
        gasEstimate += (gasEstimate * Constants.GAS_BUFFER_PERCENT) / Constants.BASIS_POINTS;
        
        return gasEstimate;
    }
    
    /**
     * @dev Retries a failed cross-chain message
     * @param messageHash Hash of the message to retry
     * @param newGasLimit New gas limit for retry
     */
    function retryMessage(
        bytes32 messageHash,
        uint256 newGasLimit
    ) external payable override nonReentrant whenNotPaused {
        MessageStatus storage status = _messageStatus[messageHash];
        
        if (status.status != 2) { // Not failed
            revert CustomErrors.InvalidOfferStatus(0, status.status, 2);
        }
        
        if (status.retryCount >= Constants.LZ_RETRY_LIMIT) {
            revert CustomErrors.ValueOutOfRange(status.retryCount, 0, Constants.LZ_RETRY_LIMIT);
        }
        
        // Calculate retry delay
        uint256 retryDelay = CrossChainLibrary.calculateRetryDelay(status.retryCount + 1);
        if (block.timestamp < status.lastAttempt + retryDelay) {
            revert CustomErrors.OperationTimeout(status.lastAttempt + retryDelay, block.timestamp);
        }
        
        // Update retry tracking
        status.retryCount++;
        status.lastAttempt = block.timestamp;
        status.status = 0; // Reset to pending
        
        emit MessageRetry(messageHash, status.retryCount);
    }
    
    // ============ CONFIGURATION FUNCTIONS ============
    
    /**
     * @dev Sets LayerZero endpoint for a specific chain
     * @param chainId Chain ID
     * @param endpoint LayerZero endpoint address
     */
    function setLayerZeroEndpoint(uint256 chainId, address endpoint) 
        external 
        override 
        onlyAdmin 
        nonReentrant 
    {
        if (endpoint == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        address oldEndpoint = _layerZeroEndpoints[chainId];
        _layerZeroEndpoints[chainId] = endpoint;
        
        emit EndpointUpdated(chainId, oldEndpoint, endpoint);
    }
    
    /**
     * @dev Sets trusted remote for cross-chain communication
     * @param chainId Remote chain ID
     * @param remoteAddress Trusted remote contract address
     */
    function setTrustedRemote(uint256 chainId, address remoteAddress) 
        external 
        override 
        onlyAdmin 
        nonReentrant 
    {
        if (remoteAddress == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        _trustedRemotes[chainId] = remoteAddress;
    }
    
    /**
     * @dev Sets default gas limit for a destination chain
     * @param chainId Destination chain ID
     * @param gasLimit Default gas limit
     */
    function setDefaultGasLimit(uint256 chainId, uint256 gasLimit) 
        external 
        override 
        onlyAdmin 
        nonReentrant 
    {
        if (gasLimit < Constants.MIN_GAS_LIMIT || gasLimit > Constants.MAX_GAS_LIMIT) {
            revert CustomErrors.InsufficientGasLimit(gasLimit, Constants.MIN_GAS_LIMIT);
        }
        
        _defaultGasLimits[chainId] = gasLimit;
    }
    
    /**
     * @dev Enables or disables cross-chain communication for a chain
     * @param chainId Chain ID
     * @param enabled Whether to enable communication
     */
    function setChainEnabled(uint256 chainId, bool enabled) 
        external 
        override 
        onlyAdmin 
        nonReentrant 
    {
        bool wasEnabled = _chainEnabled[chainId];
        _chainEnabled[chainId] = enabled;
        
        // Add to supported chains if newly enabled
        if (enabled && !wasEnabled) {
            _supportedChains.push(chainId);
        }
        
        // Remove from supported chains if disabled
        if (!enabled && wasEnabled) {
            _removeSupportedChain(chainId);
        }
    }
    
    // ============ BATCH OPERATIONS ============
    
    /**
     * @dev Sends multiple cross-chain messages in batch
     * @param destinations Array of destination chain IDs
     * @param payloads Array of message payloads
     * @param gasLimits Array of gas limits
     * @return messageHashes Array of message hashes
     */
    function sendBatchMessages(
        uint256[] calldata destinations,
        bytes[] calldata payloads,
        uint256[] calldata gasLimits
    ) external payable override nonReentrant whenNotPaused returns (bytes32[] memory messageHashes) {
        if (destinations.length != payloads.length || destinations.length != gasLimits.length) {
            revert CustomErrors.ArrayLengthMismatch(destinations.length, payloads.length);
        }
        
        if (destinations.length == 0) {
            revert CustomErrors.EmptyArray();
        }
        
        if (destinations.length > Constants.MAX_BATCH_SIZE) {
            revert CustomErrors.TooManyAssets(destinations.length, Constants.MAX_BATCH_SIZE);
        }
        
        messageHashes = new bytes32[](destinations.length);
        
        for (uint256 i = 0; i < destinations.length; i++) {
            messageHashes[i] = this.sendMessage{value: msg.value / destinations.length}(destinations[i], payloads[i], gasLimits[i]);
        }
        
        return messageHashes;
    }
    
    /**
     * @dev Retries multiple failed messages in batch
     * @param messageHashes Array of message hashes to retry
     * @param gasLimits Array of new gas limits
     */
    function retryBatchMessages(
        bytes32[] calldata messageHashes,
        uint256[] calldata gasLimits
    ) external payable override nonReentrant whenNotPaused {
        if (messageHashes.length != gasLimits.length) {
            revert CustomErrors.ArrayLengthMismatch(messageHashes.length, gasLimits.length);
        }
        
        if (messageHashes.length == 0) {
            revert CustomErrors.EmptyArray();
        }
        
        for (uint256 i = 0; i < messageHashes.length; i++) {
            this.retryMessage{value: msg.value / messageHashes.length}(messageHashes[i], gasLimits[i]);
        }
    }
    
    // ============ VIEW FUNCTIONS ============
    
    /**
     * @dev Gets LayerZero endpoint for a specific chain
     * @param chainId Chain ID
     * @return endpoint LayerZero endpoint address
     */
    function getLayerZeroEndpoint(uint256 chainId) 
        external 
        view 
        override 
        returns (address endpoint) 
    {
        return _layerZeroEndpoints[chainId];
    }
    
    /**
     * @dev Gets trusted remote address for a chain
     * @param chainId Remote chain ID
     * @return remoteAddress Trusted remote contract address
     */
    function getTrustedRemote(uint256 chainId) 
        external 
        view 
        override 
        returns (address remoteAddress) 
    {
        return _trustedRemotes[chainId];
    }
    
    /**
     * @dev Gets default gas limit for a destination chain
     * @param chainId Destination chain ID
     * @return gasLimit Default gas limit
     */
    function getDefaultGasLimit(uint256 chainId) 
        external 
        view 
        override 
        returns (uint256 gasLimit) 
    {
        return _defaultGasLimits[chainId];
    }
    
    /**
     * @dev Checks if cross-chain communication is enabled for a chain
     * @param chainId Chain ID
     * @return enabled Whether communication is enabled
     */
    function isChainEnabled(uint256 chainId) 
        external 
        view 
        override 
        returns (bool enabled) 
    {
        return _chainEnabled[chainId];
    }
    
    /**
     * @dev Gets message status and details
     * @param messageHash Hash of the message
     * @return status Message status (0=pending, 1=delivered, 2=failed)
     * @return retryCount Number of retry attempts
     * @return lastAttempt Timestamp of last attempt
     */
    function getMessageStatus(bytes32 messageHash) 
        external 
        view 
        override 
        returns (uint8 status, uint256 retryCount, uint256 lastAttempt) 
    {
        MessageStatus memory msgStatus = _messageStatus[messageHash];
        return (msgStatus.status, msgStatus.retryCount, msgStatus.lastAttempt);
    }
    
    /**
     * @dev Gets all supported chain IDs
     * @return chainIds Array of supported chain IDs
     */
    function getSupportedChains() 
        external 
        view 
        override 
        returns (uint256[] memory chainIds) 
    {
        return _supportedChains;
    }
    
    /**
     * @dev Checks if a message hash has been processed
     * @param messageHash Hash of the message
     * @return processed Whether the message has been processed
     */
    function isMessageProcessed(bytes32 messageHash) 
        external 
        view 
        override 
        returns (bool processed) 
    {
        return _processedMessages[messageHash];
    }
    
    /**
     * @dev Gets cross-chain bridge statistics
     * @return totalMessagesSentCount Total messages sent
     * @return totalMessagesReceivedCount Total messages received
     * @return totalGasUsedAmount Total gas used for cross-chain operations
     */
    function getBridgeStats() 
        external 
        view 
        override 
        returns (uint256 totalMessagesSentCount, uint256 totalMessagesReceivedCount, uint256 totalGasUsedAmount) 
    {
        return (totalMessagesSent, totalMessagesReceived, totalGasUsed);
    }
    
    // ============ EMERGENCY FUNCTIONS ============
    
    /**
     * @dev Emergency pause of cross-chain operations
     */
    function emergencyPause() external override onlyAdmin {
        _emergencyPaused = true;
        emit EmergencyPauseStatusChanged(true, msg.sender);
    }
    
    /**
     * @dev Resume cross-chain operations after emergency pause
     */
    function emergencyUnpause() external override onlyAdmin {
        _emergencyPaused = false;
        emit EmergencyPauseStatusChanged(false, msg.sender);
    }
    
    /**
     * @dev Emergency withdrawal of stuck native tokens
     * @param recipient Address to receive the tokens
     * @param amount Amount to withdraw
     */
    function emergencyWithdraw(address recipient, uint256 amount) 
        external 
        override 
        onlyAdmin 
        nonReentrant 
    {
        if (recipient == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        if (amount > address(this).balance) {
            revert CustomErrors.InsufficientEscrowBalance(address(0), 0, amount, address(this).balance);
        }
        
        (bool success, ) = payable(recipient).call{value: amount}("");
        if (!success) {
            revert CustomErrors.FeePaymentFailed(recipient, amount);
        }
    }
    
    // ============ INTERNAL FUNCTIONS ============
    
    /**
     * @dev Initializes supported chains with default configurations
     */
    function _initializeSupportedChains() internal {
        // Initialize supported chains including ApeChain
        uint256[] memory chains = new uint256[](6);
        chains[0] = Constants.ETHEREUM_CHAIN_ID;
        chains[1] = Constants.ARBITRUM_CHAIN_ID;
        chains[2] = Constants.POLYGON_CHAIN_ID;
        chains[3] = Constants.OPTIMISM_CHAIN_ID;
        chains[4] = Constants.BASE_CHAIN_ID;
        chains[5] = block.chainid; // Current chain (including ApeChain)
        
        
        for (uint256 i = 0; i < chains.length; i++) {
            _chainEnabled[chains[i]] = true;
            _defaultGasLimits[chains[i]] = Constants.DEFAULT_GAS_LIMIT;
            _supportedChains.push(chains[i]);
        }
    }
    
    /**
     * @dev Sends message through LayerZero (simplified implementation)
     * @param destinationChain Target chain ID
     * @param payload Message payload
     * @param gasLimit Gas limit for execution
     * @return gasUsed Gas used for sending
     */
    function _sendLayerZeroMessage(
        uint256 destinationChain,
        bytes calldata payload,
        uint256 gasLimit
    ) internal returns (uint256 gasUsed) {
        // This is a simplified implementation
        // In production, this would integrate with actual LayerZero V2 endpoints
        
        address endpoint = _layerZeroEndpoints[destinationChain];
        if (endpoint == address(0)) {
            revert CustomErrors.LayerZeroEndpointNotSet(destinationChain);
        }
        
        // Simulate gas usage
        gasUsed = gasLimit + Constants.LZ_GAS_BUFFER;
        
        // In production, this would call the LayerZero endpoint
        // ILayerZeroEndpoint(endpoint).send{value: msg.value}(...)
        
        return gasUsed;
    }
    
    /**
     * @dev Processes received cross-chain message
     * @param sourceChain Source chain ID
     * @param payload Message payload
     * @return success Whether processing was successful
     */
    function _processReceivedMessage(
        uint256 sourceChain,
        bytes calldata payload
    ) internal returns (bool success) {
        // Decode and process the message
        try this._decodeAndExecuteMessage(sourceChain, payload) {
            return true;
        } catch {
            return false;
        }
    }
    
    /**
     * @dev Decodes and executes cross-chain message
     * @param sourceChain Source chain ID
     * @param payload Message payload
     */
    function _decodeAndExecuteMessage(
        uint256 sourceChain,
        bytes calldata payload
    ) external {
        // This function would decode the message and execute the appropriate action
        // For now, it's a placeholder
        require(msg.sender == address(this), "Internal function");
        
        // Decode message
        DataStructures.CrossChainMessage memory message = CrossChainLibrary.decodeMessage(payload);
        
        // Validate message
        (bool valid, ) = CrossChainLibrary.validateMessage(message, 1 hours);
        require(valid, "Invalid message");
        
        // Process based on message type
        // This would integrate with the main trading contract
    }
    
    /**
     * @dev Removes a chain from supported chains array
     * @param chainId Chain ID to remove
     */
    function _removeSupportedChain(uint256 chainId) internal {
        for (uint256 i = 0; i < _supportedChains.length; i++) {
            if (_supportedChains[i] == chainId) {
                _supportedChains[i] = _supportedChains[_supportedChains.length - 1];
                _supportedChains.pop();
                break;
            }
        }
    }
    
    /**
     * @dev Returns the version of the contract
     * @return version The contract version
     */
    function version() external pure returns (string memory) {
        return "1.0.0";
    }
    
    /**
     * @dev Allows contract to receive native tokens
     */
    receive() external payable {
        // Allow contract to receive native tokens for cross-chain operations
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts-upgradeable/utils/ReentrancyGuardUpgradeable.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol";
import "@openzeppelin/contracts/token/ERC1155/IERC1155Receiver.sol";
import "../interfaces/IEscrowTrading.sol";
import "../libraries/DataStructures.sol";
import "../libraries/Constants.sol";
import "../libraries/Errors.sol";
import "../libraries/AssetLibrary.sol";
import "../libraries/SignatureLibrary.sol";
import "../core/AccessControl.sol";
import "../core/FeeManager.sol";
import "../core/OfferManager.sol";
import "../security/AssetVerification.sol";

/**
 * @title EscrowContract
 * @dev Main escrow and trading logic for the Cross-Chain NFT Trading Platform
 * @author Blocklabs Studio
 */
contract EscrowContract is 
    Initializable,
    ReentrancyGuardUpgradeable,
    IERC721Receiver,
    IERC1155Receiver,
    IEscrowTrading
{
    
    // ============ STATE VARIABLES ============
    
    /// @dev Reference to the AccessControl contract
    AccessControl public accessControl;
    
    /// @dev Reference to the FeeManager contract
    FeeManager public feeManager;
    
    /// @dev Reference to the OfferManager contract
    OfferManager public offerManager;
    
    /// @dev Reference to the AssetVerification contract
    AssetVerification public assetVerification;
    
    /// @dev Mapping from offer ID to escrowed assets for creator
    mapping(uint256 => DataStructures.Asset[]) private _creatorEscrowedAssets;
    
    /// @dev Mapping from offer ID to escrowed assets for acceptor
    mapping(uint256 => DataStructures.Asset[]) private _acceptorEscrowedAssets;
    
    /// @dev Mapping to track asset deposit status
    mapping(uint256 => mapping(address => bool)) private _assetsDeposited;
    
    /// @dev Mapping to track settlement status
    mapping(uint256 => bool) private _settledOffers;
    
    /// @dev Platform statistics
    uint256 public totalTrades;
    uint256 public totalVolume;
    uint256 public totalFees;
    
    /// @dev Emergency withdrawal tracking
    mapping(uint256 => bool) private _emergencyWithdrawn;
    
    /// @dev EIP-712 domain separator
    bytes32 private _domainSeparator;
    
    // ============ ADDITIONAL EVENTS ============
    
    /**
     * @dev Emitted when assets are withdrawn from escrow
     * @param offerId The offer identifier
     * @param withdrawer The address withdrawing assets
     * @param assets The assets withdrawn
     */
    event AssetsWithdrawn(
        uint256 indexed offerId,
        address indexed withdrawer,
        DataStructures.Asset[] assets
    );
    
    /**
     * @dev Emitted when a settlement fails and assets are returned
     * @param offerId The offer identifier
     * @param reason The failure reason
     */
    event SettlementFailed(
        uint256 indexed offerId,
        string reason
    );
    
    /**
     * @dev Emitted when emergency withdrawal occurs
     * @param offerId The offer identifier
     * @param recipient The recipient of withdrawn assets
     * @param withdrawnBy The admin who performed the withdrawal
     */
    event EmergencyWithdrawal(
        uint256 indexed offerId,
        address indexed recipient,
        address indexed withdrawnBy
    );
    
    // ============ MODIFIERS ============
    
    /**
     * @dev Modifier to ensure contract is not paused
     */
    modifier whenNotPaused() {
        if (accessControl.paused()) {
            revert CustomErrors.ContractPaused();
        }
        _;
    }
    
    /**
     * @dev Modifier to check if caller has admin role
     */
    modifier onlyAdmin() {
        if (!accessControl.hasRole(Constants.ADMIN_ROLE, msg.sender)) {
            revert CustomErrors.UnauthorizedAccess(msg.sender, Constants.ADMIN_ROLE);
        }
        _;
    }
    
    /**
     * @dev Modifier to validate offer exists
     */
    modifier validOffer(uint256 offerId) {
        try offerManager.getOffer(offerId) returns (DataStructures.TradeOffer memory) {
            // Offer exists
        } catch {
            revert CustomErrors.OfferNotFound(offerId);
        }
        _;
    }
    
    // ============ INITIALIZATION ============
    
    /**
     * @dev Initializes the EscrowContract
     * @param _accessControl Address of the AccessControl contract
     * @param _feeManager Address of the FeeManager contract
     * @param _offerManager Address of the OfferManager contract
     * @param _assetVerification Address of the AssetVerification contract
     */
    function initialize(
        address _accessControl,
        address _feeManager,
        address _offerManager,
        address _assetVerification
    ) public initializer {
        if (_accessControl == address(0) || _feeManager == address(0) || 
            _offerManager == address(0) || _assetVerification == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        __ReentrancyGuard_init();
        
        accessControl = AccessControl(_accessControl);
        feeManager = FeeManager(payable(_feeManager));
        offerManager = OfferManager(_offerManager);
        assetVerification = AssetVerification(_assetVerification);
        
        // Initialize EIP-712 domain separator
        _domainSeparator = SignatureLibrary.buildDomainSeparator(address(this), block.chainid);
    }
    
    // ============ SAME-CHAIN TRADING FUNCTIONS ============
    
    /**
     * @dev Creates a new same-chain trading offer
     * @param offer The trade offer details
     * @return offerId The unique identifier for the created offer
     */
    function createSameChainOffer(DataStructures.TradeOffer calldata offer)
        external
        payable
        override
        nonReentrant
        whenNotPaused
        returns (uint256 offerId)
    {
        // Validate offer is for same-chain
        if (offer.settlementMode != DataStructures.SettlementMode.SAME_CHAIN) {
            revert CustomErrors.InvalidOfferParameters("Must be same-chain settlement mode");
        }
        
        if (offer.destinationChainId != 0) {
            revert CustomErrors.InvalidOfferParameters("Same-chain offers should not have destination chain");
        }
        
        // Validate native token amount - msg.value should be at least the required native amount
        uint256 requiredNativeAmount = AssetLibrary.calculateNativeTokenAmount(offer.offeredAssets);
        if (requiredNativeAmount > 0 && msg.value < requiredNativeAmount) {
            revert CustomErrors.NativeAssetAmountMismatch(requiredNativeAmount, msg.value);
        }
        
        // Create the offer through OfferManager
        offerId = offerManager.createOffer(offer);
        
        // Automatically deposit creator's assets
        _depositAssetsForOffer(offerId, offer.creator, offer.offeredAssets);
        
        return offerId;
    }
    
    /**
     * @dev Accepts a same-chain trading offer
     * @param offerId The unique identifier of the offer to accept
     */
    function acceptSameChainOffer(uint256 offerId) 
        external 
        payable 
        override 
        nonReentrant 
        whenNotPaused 
        validOffer(offerId) 
    {
        DataStructures.TradeOffer memory offer = offerManager.getOffer(offerId);
        
        // Validate same-chain offer
        if (offer.settlementMode != DataStructures.SettlementMode.SAME_CHAIN) {
            revert CustomErrors.InvalidOfferParameters("Not a same-chain offer");
        }
        
        // Validate acceptor can accept the offer
        (bool canAccept, string memory reason) = offerManager.canAcceptOffer(offerId, msg.sender);
        if (!canAccept) {
            revert CustomErrors.UnauthorizedOfferAcceptance(offerId, msg.sender, offer.counterparty);
        }
        
        // Validate native token amount - msg.value should be at least the required native amount
        uint256 requiredNativeAmount = AssetLibrary.calculateNativeTokenAmount(offer.requestedAssets);
        if (requiredNativeAmount > 0 && msg.value < requiredNativeAmount) {
            revert CustomErrors.NativeAssetAmountMismatch(requiredNativeAmount, msg.value);
        }
        
        // Accept the offer through OfferManager
        offerManager.acceptOffer(offerId, msg.sender);
        
        // Deposit acceptor's assets
        _depositAssetsForOffer(offerId, msg.sender, offer.requestedAssets);
        
        // Collect platform fee
        uint256 tradeValue = _calculateTradeValue(offer.offeredAssets, offer.requestedAssets);
        feeManager.collectFee{value: msg.value}(offerId, tradeValue, address(0));
        
        // Execute atomic swap immediately for same-chain
        _executeAtomicSwap(offerId, offer.creator, msg.sender);
        
        emit OfferAccepted(offerId, msg.sender, block.timestamp);
    }
    
    // ============ CROSS-CHAIN TRADING FUNCTIONS ============
    
    /**
     * @dev Creates a new cross-chain trading offer
     * @param offer The trade offer details
     * @param destinationChain The target chain for cross-chain settlement
     * @return offerId The unique identifier for the created offer
     */
    function createCrossChainOffer(
        DataStructures.TradeOffer calldata offer, 
        uint256 destinationChain
    ) external payable override nonReentrant whenNotPaused returns (uint256 offerId) {
        // Validate cross-chain configuration
        if (offer.settlementMode != DataStructures.SettlementMode.CROSS_CHAIN) {
            revert CustomErrors.InvalidOfferParameters("Must be cross-chain settlement mode");
        }
        
        if (destinationChain == 0 || destinationChain == block.chainid) {
            revert CustomErrors.InvalidOfferParameters("Invalid destination chain");
        }
        
        // Create modified offer with destination chain
        DataStructures.TradeOffer memory crossChainOffer = offer;
        crossChainOffer.destinationChainId = destinationChain;
        
        // Create the offer through OfferManager
        offerId = offerManager.createOffer(crossChainOffer);
        
        // Deposit creator's assets
        _depositAssetsForOffer(offerId, offer.creator, offer.offeredAssets);
        
        return offerId;
    }
    
    /**
     * @dev Accepts a cross-chain trading offer
     * @param offerId The unique identifier of the offer to accept
     */
    function acceptCrossChainOffer(uint256 offerId) 
        external 
        payable 
        override 
        nonReentrant 
        whenNotPaused 
        validOffer(offerId) 
    {
        DataStructures.TradeOffer memory offer = offerManager.getOffer(offerId);
        
        // Validate cross-chain offer
        if (offer.settlementMode != DataStructures.SettlementMode.CROSS_CHAIN) {
            revert CustomErrors.InvalidOfferParameters("Not a cross-chain offer");
        }
        
        // Validate acceptor can accept the offer
        (bool canAccept, string memory reason) = offerManager.canAcceptOffer(offerId, msg.sender);
        if (!canAccept) {
            revert CustomErrors.UnauthorizedOfferAcceptance(offerId, msg.sender, offer.counterparty);
        }
        
        // Accept the offer through OfferManager
        offerManager.acceptOffer(offerId, msg.sender);
        
        // Deposit acceptor's assets
        _depositAssetsForOffer(offerId, msg.sender, offer.requestedAssets);
        
        // Collect platform fee
        uint256 tradeValue = _calculateTradeValue(offer.offeredAssets, offer.requestedAssets);
        feeManager.collectFee{value: msg.value}(offerId, tradeValue, address(0));
        
        emit OfferAccepted(offerId, msg.sender, block.timestamp + Constants.CROSS_CHAIN_TIMEOUT);
    }
    
    /**
     * @dev Initiates cross-chain trade settlement
     * @param offerId The unique identifier of the offer
     * @param destinationChain The target chain for settlement
     */
    function initiateCrossChainTrade(uint256 offerId, uint256 destinationChain) 
        external 
        payable 
        override 
        nonReentrant 
        whenNotPaused 
        validOffer(offerId) 
    {
        DataStructures.TradeOffer memory offer = offerManager.getOffer(offerId);
        
        // Validate cross-chain settlement
        if (offer.settlementMode != DataStructures.SettlementMode.CROSS_CHAIN) {
            revert CustomErrors.InvalidOfferParameters("Not a cross-chain offer");
        }
        
        if (offer.status != DataStructures.OfferStatus.ACCEPTED) {
            revert CustomErrors.InvalidOfferStatus(offerId, uint8(offer.status), uint8(DataStructures.OfferStatus.ACCEPTED));
        }
        
        // Check both parties have deposited assets
        if (!_assetsDeposited[offerId][offer.creator] || !_assetsDeposited[offerId][msg.sender]) {
            revert CustomErrors.ConditionNotMet("Assets not deposited by both parties");
        }
        
        // Note: Cross-chain bridge integration would be implemented here
        // For now, we'll mark as ready for settlement
        emit CrossChainMessageSent(offerId, destinationChain, keccak256(abi.encode(offerId, block.timestamp)));
    }
    
    /**
     * @dev Completes cross-chain trade with proof
     * @param offerId The unique identifier of the offer
     * @param proof Cross-chain settlement proof
     */
    function completeCrossChainTrade(uint256 offerId, bytes calldata proof) 
        external 
        override 
        nonReentrant 
        whenNotPaused 
        validOffer(offerId) 
    {
        DataStructures.TradeOffer memory offer = offerManager.getOffer(offerId);
        
        // Validate proof (simplified for now)
        if (proof.length == 0) {
            revert CustomErrors.InvalidOfferParameters("Invalid proof");
        }
        
        // Execute the cross-chain settlement
        address acceptor = _getOfferAcceptor(offerId);
        _executeAtomicSwap(offerId, offer.creator, acceptor);
        
        emit CrossChainMessageReceived(offerId, offer.sourceChainId, keccak256(proof));
    }
    
    // ============ GENERAL OFFER MANAGEMENT ============
    
    /**
     * @dev Cancels an existing offer
     * @param offerId The unique identifier of the offer to cancel
     */
    function cancelOffer(uint256 offerId) 
        external 
        override 
        nonReentrant 
        whenNotPaused 
        validOffer(offerId) 
    {
        DataStructures.TradeOffer memory offer = offerManager.getOffer(offerId);
        
        // Cancel through OfferManager
        offerManager.cancelOffer(offerId, msg.sender);
        
        // Return escrowed assets to creator
        if (_assetsDeposited[offerId][offer.creator]) {
            _returnAssetsToUser(offerId, offer.creator, _creatorEscrowedAssets[offerId]);
        }
        
        emit OfferCancelled(offerId, offer.creator, block.timestamp);
    }
    
    /**
     * @dev Creates a counter-offer for an existing offer
     * @param offerId The unique identifier of the original offer
     * @param newOffer The counter-offer details
     * @return counterOfferId The unique identifier for the counter-offer
     */
    function counterOffer(uint256 offerId, DataStructures.TradeOffer calldata newOffer) 
        external 
        payable 
        override 
        nonReentrant 
        whenNotPaused 
        validOffer(offerId) 
        returns (uint256 counterOfferId) 
    {
        // Create counter-offer through OfferManager
        counterOfferId = offerManager.createCounterOffer(offerId, newOffer);
        
        // Deposit assets for counter-offer
        _depositAssetsForOffer(counterOfferId, newOffer.creator, newOffer.offeredAssets);
        
        return counterOfferId;
    }
    
    // ============ ASSET MANAGEMENT ============
    
    /**
     * @dev Deposits assets into escrow for an offer
     * @param offerId The unique identifier of the offer
     * @param assets Array of assets to deposit
     */
    function depositAssets(uint256 offerId, DataStructures.Asset[] calldata assets) 
        external 
        payable 
        override 
        nonReentrant 
        whenNotPaused 
        validOffer(offerId) 
    {
        _depositAssetsForOffer(offerId, msg.sender, assets);
    }
    
    /**
     * @dev Withdraws assets from escrow (for cancelled/expired offers)
     * @param offerId The unique identifier of the offer
     */
    function withdrawAssets(uint256 offerId) 
        external 
        override 
        nonReentrant 
        whenNotPaused 
        validOffer(offerId) 
    {
        DataStructures.TradeOffer memory offer = offerManager.getOffer(offerId);
        
        // Only allow withdrawal for cancelled or expired offers
        if (offer.status != DataStructures.OfferStatus.CANCELLED && 
            offer.status != DataStructures.OfferStatus.EXPIRED) {
            revert CustomErrors.InvalidOfferStatus(offerId, uint8(offer.status), uint8(DataStructures.OfferStatus.CANCELLED));
        }
        
        // Return assets to depositor
        if (msg.sender == offer.creator && _assetsDeposited[offerId][offer.creator]) {
            _returnAssetsToUser(offerId, msg.sender, _creatorEscrowedAssets[offerId]);
        } else {
            // Find acceptor and return their assets
            address acceptor = _getOfferAcceptor(offerId);
            if (msg.sender == acceptor && _assetsDeposited[offerId][acceptor]) {
                _returnAssetsToUser(offerId, msg.sender, _acceptorEscrowedAssets[offerId]);
            } else {
                revert CustomErrors.UnauthorizedAccess(msg.sender, Constants.ADMIN_ROLE);
            }
        }
    }
    
    /**
     * @dev Emergency withdrawal of assets (admin only)
     * @param offerId The unique identifier of the offer
     * @param recipient Address to receive the assets
     */
    function emergencyWithdrawAssets(uint256 offerId, address recipient) 
        external 
        override 
        onlyAdmin 
        nonReentrant 
    {
        if (recipient == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        if (_emergencyWithdrawn[offerId]) {
            revert CustomErrors.UpgradeAlreadyExecuted(offerId);
        }
        
        _emergencyWithdrawn[offerId] = true;
        
        // Withdraw all escrowed assets for this offer
        DataStructures.Asset[] storage creatorAssets = _creatorEscrowedAssets[offerId];
        DataStructures.Asset[] storage acceptorAssets = _acceptorEscrowedAssets[offerId];
        
        // Transfer creator assets
        for (uint256 i = 0; i < creatorAssets.length; i++) {
            AssetLibrary.transferAsset(creatorAssets[i], address(this), recipient);
        }
        
        // Transfer acceptor assets
        for (uint256 i = 0; i < acceptorAssets.length; i++) {
            AssetLibrary.transferAsset(acceptorAssets[i], address(this), recipient);
        }
        
        emit EmergencyWithdrawal(offerId, recipient, msg.sender);
    }
    
    // ============ BATCH OPERATIONS ============
    
    /**
     * @dev Creates multiple offers in a single transaction
     * @param offers Array of trade offers to create
     * @return offerIds Array of created offer identifiers
     */
    function createBatchOffers(DataStructures.TradeOffer[] calldata offers) 
        external 
        payable 
        override 
        nonReentrant 
        whenNotPaused 
        returns (uint256[] memory offerIds) 
    {
        if (offers.length == 0) {
            revert CustomErrors.EmptyArray();
        }
        
        if (offers.length > Constants.MAX_BATCH_SIZE) {
            revert CustomErrors.TooManyAssets(offers.length, Constants.MAX_BATCH_SIZE);
        }
        
        offerIds = new uint256[](offers.length);
        
        for (uint256 i = 0; i < offers.length; i++) {
            if (offers[i].settlementMode == DataStructures.SettlementMode.SAME_CHAIN) {
                offerIds[i] = this.createSameChainOffer(offers[i]);
            } else {
                offerIds[i] = this.createCrossChainOffer(offers[i], offers[i].destinationChainId);
            }
        }
        
        return offerIds;
    }
    
    /**
     * @dev Accepts multiple offers in a single transaction
     * @param offerIds Array of offer identifiers to accept
     */
    function acceptBatchOffers(uint256[] calldata offerIds) 
        external 
        payable 
        override 
        nonReentrant 
        whenNotPaused 
    {
        if (offerIds.length == 0) {
            revert CustomErrors.EmptyArray();
        }
        
        if (offerIds.length > Constants.MAX_BATCH_SIZE) {
            revert CustomErrors.TooManyAssets(offerIds.length, Constants.MAX_BATCH_SIZE);
        }
        
        for (uint256 i = 0; i < offerIds.length; i++) {
            DataStructures.TradeOffer memory offer = offerManager.getOffer(offerIds[i]);
            
            if (offer.settlementMode == DataStructures.SettlementMode.SAME_CHAIN) {
                this.acceptSameChainOffer(offerIds[i]);
            } else {
                this.acceptCrossChainOffer(offerIds[i]);
            }
        }
    }
    
    /**
     * @dev Cancels multiple offers in a single transaction
     * @param offerIds Array of offer identifiers to cancel
     */
    function cancelBatchOffers(uint256[] calldata offerIds) 
        external 
        override 
        nonReentrant 
        whenNotPaused 
    {
        if (offerIds.length == 0) {
            revert CustomErrors.EmptyArray();
        }
        
        for (uint256 i = 0; i < offerIds.length; i++) {
            this.cancelOffer(offerIds[i]);
        }
    }
    
    // ============ VIEW FUNCTIONS ============
    
    /**
     * @dev Gets complete offer details
     * @param offerId The unique identifier of the offer
     * @return offer The complete offer structure
     */
    function getOffer(uint256 offerId) 
        external 
        view 
        override 
        returns (DataStructures.TradeOffer memory offer) 
    {
        return offerManager.getOffer(offerId);
    }
    
    /**
     * @dev Gets the current status of an offer
     * @param offerId The unique identifier of the offer
     * @return status The current offer status
     */
    function getOfferStatus(uint256 offerId) 
        external 
        view 
        override 
        returns (DataStructures.OfferStatus status) 
    {
        DataStructures.TradeOffer memory offer = offerManager.getOffer(offerId);
        return offer.status;
    }
    
    /**
     * @dev Gets all offers created by a specific user
     * @param user The user address
     * @return offerIds Array of offer identifiers
     */
    function getUserOffers(address user) 
        external 
        view 
        override 
        returns (uint256[] memory offerIds) 
    {
        return offerManager.getOffersByCreator(user);
    }
    
    /**
     * @dev Gets all active same-chain offers
     * @return offerIds Array of same-chain offer identifiers
     */
    function getSameChainOffers() 
        external 
        view 
        override 
        returns (uint256[] memory offerIds) 
    {
        uint256[] memory allOffers = offerManager.getActiveOffers();
        uint256 sameChainCount = 0;
        
        // Count same-chain offers
        for (uint256 i = 0; i < allOffers.length; i++) {
            DataStructures.TradeOffer memory offer = offerManager.getOffer(allOffers[i]);
            if (offer.settlementMode == DataStructures.SettlementMode.SAME_CHAIN) {
                sameChainCount++;
            }
        }
        
        // Create result array
        uint256[] memory sameChainOffers = new uint256[](sameChainCount);
        uint256 index = 0;
        
        for (uint256 i = 0; i < allOffers.length; i++) {
            DataStructures.TradeOffer memory offer = offerManager.getOffer(allOffers[i]);
            if (offer.settlementMode == DataStructures.SettlementMode.SAME_CHAIN) {
                sameChainOffers[index] = allOffers[i];
                index++;
            }
        }
        
        return sameChainOffers;
    }
    
    /**
     * @dev Gets all active cross-chain offers for a specific chain
     * @param chainId The target chain ID
     * @return offerIds Array of cross-chain offer identifiers
     */
    function getCrossChainOffers(uint256 chainId) 
        external 
        view 
        override 
        returns (uint256[] memory offerIds) 
    {
        uint256[] memory allOffers = offerManager.getActiveOffers();
        uint256 crossChainCount = 0;
        
        // Count cross-chain offers for the specified chain
        for (uint256 i = 0; i < allOffers.length; i++) {
            DataStructures.TradeOffer memory offer = offerManager.getOffer(allOffers[i]);
            if (offer.settlementMode == DataStructures.SettlementMode.CROSS_CHAIN && 
                offer.destinationChainId == chainId) {
                crossChainCount++;
            }
        }
        
        // Create result array
        uint256[] memory crossChainOffers = new uint256[](crossChainCount);
        uint256 index = 0;
        
        for (uint256 i = 0; i < allOffers.length; i++) {
            DataStructures.TradeOffer memory offer = offerManager.getOffer(allOffers[i]);
            if (offer.settlementMode == DataStructures.SettlementMode.CROSS_CHAIN && 
                offer.destinationChainId == chainId) {
                crossChainOffers[index] = allOffers[i];
                index++;
            }
        }
        
        return crossChainOffers;
    }
    
    /**
     * @dev Gets cross-chain settlement details (placeholder)
     * @param offerId The unique identifier of the offer
     * @return settlement The cross-chain settlement information
     */
    function getCrossChainSettlement(uint256 offerId) 
        external 
        view 
        override 
        returns (DataStructures.CrossChainSettlement memory settlement) 
    {
        // This would be implemented with actual cross-chain bridge integration
        DataStructures.TradeOffer memory offer = offerManager.getOffer(offerId);
        
        settlement.offerId = offerId;
        settlement.sourceChain = offer.sourceChainId;
        settlement.destinationChain = offer.destinationChainId;
        settlement.state = DataStructures.SettlementState.PENDING;
        settlement.timelock = block.timestamp + Constants.CROSS_CHAIN_TIMEOUT;
        settlement.gasLimit = Constants.DEFAULT_GAS_LIMIT;
        
        return settlement;
    }
    
    /**
     * @dev Checks if an offer is valid and can be accepted
     * @param offerId The unique identifier of the offer
     * @return isValid Whether the offer is valid
     * @return reason Reason if offer is invalid
     */
    function isOfferValid(uint256 offerId) 
        external 
        view 
        override 
        returns (bool isValid, string memory reason) 
    {
        try offerManager.getOffer(offerId) returns (DataStructures.TradeOffer memory offer) {
            if (offer.status != DataStructures.OfferStatus.PENDING) {
                return (false, "Offer is not pending");
            }
            
            if (block.timestamp > offer.expirationTime) {
                return (false, "Offer has expired");
            }
            
            return (true, "");
        } catch {
            return (false, "Offer does not exist");
        }
    }
    
    /**
     * @dev Estimates gas cost for cross-chain operation (placeholder)
     * @param destinationChain The target chain ID
     * @param payload The message payload
     * @return gasEstimate The estimated gas cost
     */
    function estimateCrossChainGas(uint256 destinationChain, bytes calldata payload) 
        external 
        view 
        override 
        returns (uint256 gasEstimate) 
    {
        // This would integrate with actual cross-chain bridge
        return Constants.DEFAULT_GAS_LIMIT + (payload.length * 100);
    }
    
    /**
     * @dev Gets the next available offer ID
     * @return nextOfferId The next offer identifier
     */
    function getNextOfferId() 
        external 
        view 
        override 
        returns (uint256 nextOfferId) 
    {
        return offerManager.getNextOfferId();
    }
    
    /**
     * @dev Gets total number of offers created
     * @return totalOffers The total number of offers
     */
    function getTotalOffers() 
        external 
        view 
        override 
        returns (uint256) 
    {
        return offerManager.getTotalOffers();
    }
    
    /**
     * @dev Gets platform statistics
     * @return totalTradesCount Total completed trades
     * @return totalVolumeAmount Total trading volume
     * @return totalFeesAmount Total fees collected
     */
    function getPlatformStats()
        external
        view
        override
        returns (uint256 totalTradesCount, uint256 totalVolumeAmount, uint256 totalFeesAmount)
    {
        return (totalTrades, totalVolume, totalFees);
    }
    
    // ============ INTERNAL FUNCTIONS ============
    
    /**
     * @dev Deposits assets for a specific offer
     * @param offerId The offer identifier
     * @param depositor The address depositing assets
     * @param assets The assets to deposit
     */
    function _depositAssetsForOffer(
        uint256 offerId,
        address depositor,
        DataStructures.Asset[] memory assets
    ) internal {
        // Verify assets and transfer to escrow
        for (uint256 i = 0; i < assets.length; i++) {
            // Verify asset ownership and approval
            if (!AssetLibrary.verifyOwnership(assets[i], depositor)) {
                revert CustomErrors.AssetOwnershipMismatch(
                    assets[i].tokenContract,
                    assets[i].tokenId,
                    depositor,
                    depositor
                );
            }
            
            if (!AssetLibrary.verifyApproval(assets[i], depositor, address(this))) {
                revert CustomErrors.AssetTransferNotApproved(
                    assets[i].tokenContract,
                    assets[i].tokenId,
                    depositor,
                    address(this)
                );
            }
            
            // Transfer asset to escrow
            AssetLibrary.transferAsset(assets[i], depositor, address(this));
        }
        
        // Store escrowed assets
        DataStructures.TradeOffer memory offer = offerManager.getOffer(offerId);
        if (depositor == offer.creator) {
            for (uint256 i = 0; i < assets.length; i++) {
                _creatorEscrowedAssets[offerId].push(assets[i]);
            }
        } else {
            for (uint256 i = 0; i < assets.length; i++) {
                _acceptorEscrowedAssets[offerId].push(assets[i]);
            }
        }
        
        _assetsDeposited[offerId][depositor] = true;
        
        emit AssetsDeposited(offerId, depositor, assets);
    }
    
    /**
     * @dev Executes atomic swap of assets
     * @param offerId The offer identifier
     * @param creator The offer creator
     * @param acceptor The offer acceptor
     */
    function _executeAtomicSwap(uint256 offerId, address creator, address acceptor) internal {
        if (_settledOffers[offerId]) {
            revert CustomErrors.UpgradeAlreadyExecuted(offerId);
        }
        
        // Transfer creator's assets to acceptor
        DataStructures.Asset[] storage creatorAssets = _creatorEscrowedAssets[offerId];
        for (uint256 i = 0; i < creatorAssets.length; i++) {
            AssetLibrary.transferAsset(creatorAssets[i], address(this), acceptor);
        }
        
        // Transfer acceptor's assets to creator
        DataStructures.Asset[] storage acceptorAssets = _acceptorEscrowedAssets[offerId];
        for (uint256 i = 0; i < acceptorAssets.length; i++) {
            AssetLibrary.transferAsset(acceptorAssets[i], address(this), creator);
        }
        
        _settledOffers[offerId] = true;
        totalTrades++;
        
        emit AssetsSwapped(offerId, creator, acceptor, block.timestamp);
    }
    
    /**
     * @dev Returns assets to a user
     * @param offerId The offer identifier
     * @param user The user to return assets to
     * @param assets The assets to return
     */
    function _returnAssetsToUser(
        uint256 offerId,
        address user,
        DataStructures.Asset[] storage assets
    ) internal {
        for (uint256 i = 0; i < assets.length; i++) {
            AssetLibrary.transferAsset(assets[i], address(this), user);
        }
        
        _assetsDeposited[offerId][user] = false;
        
        emit AssetsWithdrawn(offerId, user, assets);
    }
    
    /**
     * @dev Calculates trade value for fee calculation
     * @param offeredAssets Assets being offered
     * @param requestedAssets Assets being requested
     * @return value The calculated trade value
     */
    function _calculateTradeValue(
        DataStructures.Asset[] memory offeredAssets,
        DataStructures.Asset[] memory requestedAssets
    ) internal pure returns (uint256 value) {
        // Simplified calculation - in production, this would integrate with price oracles
        return offeredAssets.length + requestedAssets.length;
    }
    
    /**
     * @dev Gets the acceptor of an offer
     * @param offerId The offer identifier
     * @return acceptor The acceptor address
     */
    function _getOfferAcceptor(uint256 offerId) internal view returns (address acceptor) {
        // This is a simplified implementation
        // In practice, you'd track acceptors more explicitly
        DataStructures.TradeOffer memory offer = offerManager.getOffer(offerId);
        return offer.counterparty; // Simplified
    }
    
    // ============ RECEIVER FUNCTIONS ============
    
    /**
     * @dev Handles the receipt of an NFT
     */
    function onERC721Received(
        address,
        address,
        uint256,
        bytes calldata
    ) external pure override returns (bytes4) {
        return IERC721Receiver.onERC721Received.selector;
    }
    
    /**
     * @dev Handles the receipt of a single ERC1155 token type
     */
    function onERC1155Received(
        address,
        address,
        uint256,
        uint256,
        bytes calldata
    ) external pure override returns (bytes4) {
        return IERC1155Receiver.onERC1155Received.selector;
    }
    
    /**
     * @dev Handles the receipt of multiple ERC1155 token types
     */
    function onERC1155BatchReceived(
        address,
        address,
        uint256[] calldata,
        uint256[] calldata,
        bytes calldata
    ) external pure override returns (bytes4) {
        return IERC1155Receiver.onERC1155BatchReceived.selector;
    }
    
    /**
     * @dev Returns whether this contract supports the given interface
     */
    function supportsInterface(bytes4 interfaceId) external pure override returns (bool) {
        return interfaceId == type(IERC721Receiver).interfaceId ||
               interfaceId == type(IERC1155Receiver).interfaceId ||
               interfaceId == type(IERC165).interfaceId;
    }
    
    /**
     * @dev Returns the version of the contract
     * @return version The contract version
     */
    function version() external pure returns (string memory) {
        return "1.0.0";
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts-upgradeable/utils/ReentrancyGuardUpgradeable.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "../interfaces/IFeeManager.sol";
import "../libraries/DataStructures.sol";
import "../libraries/Constants.sol";
import "../libraries/Errors.sol";
import "./AccessControl.sol";

/**
 * @title FeeManager
 * @dev Platform fee management for the Cross-Chain NFT Trading Platform
 * @author Blocklabs Studio
 */
contract FeeManager is 
    Initializable,
    ReentrancyGuardUpgradeable,
    IFeeManager
{
    using SafeERC20 for IERC20;
    
    // ============ STATE VARIABLES ============
    
    /// @dev Reference to the AccessControl contract
    AccessControl public accessControl;
    
    /// @dev Fee configuration per chain
    mapping(uint256 => DataStructures.FeeConfig) private _feeConfigs;
    
    /// @dev Fee exemption list
    mapping(address => bool) private _feeExemptions;
    
    /// @dev Total fees collected per token
    mapping(address => uint256) private _totalFeesCollected;
    
    /// @dev Fee collection history per offer
    mapping(uint256 => uint256) private _offerFees;
    
    /// @dev Supported fee tokens per chain
    mapping(uint256 => address[]) private _supportedFeeTokens;
    
    /// @dev Fee collection statistics
    uint256 public totalOffersProcessed;
    uint256 public totalFeeVolume;
    
    // ============ EVENTS ============
    
    /**
     * @dev Emitted when fee configuration is updated for a chain
     * @param chainId The chain ID
     * @param oldConfig The previous fee configuration
     * @param newConfig The new fee configuration
     * @param updatedBy The address that updated the configuration
     */
    event FeeConfigUpdated(
        uint256 indexed chainId,
        DataStructures.FeeConfig oldConfig,
        DataStructures.FeeConfig newConfig,
        address indexed updatedBy
    );
    
    /**
     * @dev Emitted when fee exemption status is updated
     * @param account The account whose exemption status was updated
     * @param exempt Whether the account is exempt from fees
     * @param updatedBy The address that updated the exemption
     */
    event FeeExemptionUpdated(
        address indexed account,
        bool exempt,
        address indexed updatedBy
    );
    
    /**
     * @dev Emitted when fees are collected
     * @param offerId The offer ID associated with the fee
     * @param token The token address (0x0 for native)
     * @param amount The fee amount collected
     * @param recipient The fee recipient
     * @param payer The address that paid the fee
     */
    event FeeCollected(
        uint256 indexed offerId,
        address indexed token,
        uint256 amount,
        address indexed recipient,
        address payer
    );
    
    /**
     * @dev Emitted when fees are withdrawn by admin
     * @param token The token address (0x0 for native)
     * @param amount The amount withdrawn
     * @param recipient The withdrawal recipient
     * @param withdrawnBy The admin who performed the withdrawal
     */
    event FeesWithdrawn(
        address indexed token,
        uint256 amount,
        address indexed recipient,
        address indexed withdrawnBy
    );
    
    // ============ MODIFIERS ============
    
    /**
     * @dev Modifier to check if caller has fee manager role
     */
    modifier onlyFeeManager() {
        if (!accessControl.hasRole(Constants.FEE_MANAGER_ROLE, msg.sender) && 
            !accessControl.hasRole(Constants.ADMIN_ROLE, msg.sender)) {
            revert CustomErrors.UnauthorizedAccess(msg.sender, Constants.FEE_MANAGER_ROLE);
        }
        _;
    }
    
    /**
     * @dev Modifier to check if caller has admin role
     */
    modifier onlyAdmin() {
        if (!accessControl.hasRole(Constants.ADMIN_ROLE, msg.sender)) {
            revert CustomErrors.UnauthorizedAccess(msg.sender, Constants.ADMIN_ROLE);
        }
        _;
    }
    
    /**
     * @dev Modifier to ensure contract is not paused
     */
    modifier whenNotPaused() {
        if (accessControl.paused()) {
            revert CustomErrors.ContractPaused();
        }
        _;
    }
    
    // ============ INITIALIZATION ============
    
    /**
     * @dev Initializes the FeeManager contract
     * @param _accessControl Address of the AccessControl contract
     */
    function initialize(address _accessControl) public initializer {
        if (_accessControl == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        __ReentrancyGuard_init();
        
        accessControl = AccessControl(_accessControl);
        
        // Initialize default fee configurations for supported chains
        _initializeDefaultFeeConfigs();
    }
    
    // ============ CORE FUNCTIONS ============
    
    /**
     * @dev Calculates the fee for a trade
     * @param chainId The chain ID
     * @param tradeValue The value of the trade
     * @return fee The calculated fee amount
     */
    function calculateFee(uint256 chainId, uint256 tradeValue) 
        external 
        view 
        override 
        returns (uint256 fee) 
    {
        DataStructures.FeeConfig memory config = _feeConfigs[chainId];
        
        if (!config.feeEnabled) {
            return 0;
        }
        
        // Calculate percentage-based fee
        uint256 percentageFee = (tradeValue * config.platformFeePercent) / Constants.BASIS_POINTS;
        
        // Ensure minimum fee is met
        if (percentageFee < config.minimumFee) {
            return config.minimumFee;
        }
        
        return percentageFee;
    }
    
    /**
     * @dev Collects fee for a trade
     * @param offerId The offer ID
     * @param tradeValue The value of the trade
     * @param feeToken The token to collect fee in (0x0 for native)
     */
    function collectFee(uint256 offerId, uint256 tradeValue, address feeToken) 
        external 
        payable 
        override 
        nonReentrant 
        whenNotPaused 
    {
        // Check if payer is fee exempt
        if (_feeExemptions[msg.sender]) {
            return;
        }
        
        uint256 chainId = block.chainid;
        DataStructures.FeeConfig memory config = _feeConfigs[chainId];
        
        if (!config.feeEnabled) {
            return;
        }
        
        uint256 feeAmount = this.calculateFee(chainId, tradeValue);
        if (feeAmount == 0) {
            return;
        }
        
        // Collect fee based on token type
        if (feeToken == address(0)) {
            // Native token fee
            if (msg.value < feeAmount) {
                revert CustomErrors.InsufficientFee(msg.value, feeAmount);
            }
            
            // Send fee to recipient
            (bool success, ) = payable(config.feeRecipient).call{value: feeAmount}("");
            if (!success) {
                revert CustomErrors.FeePaymentFailed(config.feeRecipient, feeAmount);
            }
            
            // Refund excess
            if (msg.value > feeAmount) {
                (bool refundSuccess, ) = payable(msg.sender).call{value: msg.value - feeAmount}("");
                if (!refundSuccess) {
                    revert CustomErrors.FeePaymentFailed(msg.sender, msg.value - feeAmount);
                }
            }
        } else {
            // ERC20 token fee
            if (!_isSupportedFeeToken(chainId, feeToken)) {
                revert CustomErrors.UnsupportedFeeToken(feeToken);
            }
            
            IERC20(feeToken).safeTransferFrom(
                msg.sender,
                config.feeRecipient,
                feeAmount
            );
        }
        
        // Update statistics
        _offerFees[offerId] = feeAmount;
        _totalFeesCollected[feeToken] += feeAmount;
        totalOffersProcessed++;
        totalFeeVolume += feeAmount;
        
        emit FeeCollected(offerId, feeToken, feeAmount, config.feeRecipient, msg.sender);
    }
    
    // ============ CONFIGURATION FUNCTIONS ============
    
    /**
     * @dev Sets fee configuration for a chain
     * @param chainId The chain ID
     * @param config The fee configuration
     */
    function setFeeConfig(uint256 chainId, DataStructures.FeeConfig calldata config) 
        external 
        override 
        onlyFeeManager 
        nonReentrant 
    {
        if (config.platformFeePercent > Constants.MAX_PLATFORM_FEE) {
            revert CustomErrors.FeePercentageTooHigh(config.platformFeePercent, Constants.MAX_PLATFORM_FEE);
        }
        
        if (config.feeRecipient == address(0)) {
            revert CustomErrors.InvalidFeeRecipient(config.feeRecipient);
        }
        
        DataStructures.FeeConfig memory oldConfig = _feeConfigs[chainId];
        _feeConfigs[chainId] = config;
        
        emit FeeConfigUpdated(chainId, oldConfig, config, msg.sender);
    }
    
    /**
     * @dev Sets fee exemption status for an account
     * @param account The account to set exemption for
     * @param exempt Whether the account should be exempt
     */
    function setFeeExemption(address account, bool exempt) 
        external 
        override 
        onlyFeeManager 
        nonReentrant 
    {
        if (account == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        _feeExemptions[account] = exempt;
        
        emit FeeExemptionUpdated(account, exempt, msg.sender);
    }
    
    /**
     * @dev Adds a supported fee token for a chain
     * @param chainId The chain ID
     * @param token The token address to add
     */
    function addSupportedFeeToken(uint256 chainId, address token) 
        external 
        onlyFeeManager 
        nonReentrant 
    {
        if (token == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        if (_isSupportedFeeToken(chainId, token)) {
            revert CustomErrors.DuplicateEntry(keccak256(abi.encodePacked(chainId, token)));
        }
        
        _supportedFeeTokens[chainId].push(token);
    }
    
    /**
     * @dev Removes a supported fee token for a chain
     * @param chainId The chain ID
     * @param token The token address to remove
     */
    function removeSupportedFeeToken(uint256 chainId, address token) 
        external 
        onlyFeeManager 
        nonReentrant 
    {
        address[] storage tokens = _supportedFeeTokens[chainId];
        
        for (uint256 i = 0; i < tokens.length; i++) {
            if (tokens[i] == token) {
                tokens[i] = tokens[tokens.length - 1];
                tokens.pop();
                return;
            }
        }
        
        revert CustomErrors.UnsupportedFeeToken(token);
    }
    
    // ============ ADMIN FUNCTIONS ============
    
    /**
     * @dev Withdraws collected fees (admin only)
     * @param token The token to withdraw (0x0 for native)
     * @param amount The amount to withdraw
     * @param recipient The withdrawal recipient
     */
    function withdrawFees(address token, uint256 amount, address recipient) 
        external 
        onlyAdmin 
        nonReentrant 
    {
        if (recipient == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        if (amount == 0) {
            revert CustomErrors.ValueOutOfRange(amount, 1, type(uint256).max);
        }
        
        if (token == address(0)) {
            // Withdraw native token
            if (address(this).balance < amount) {
                revert CustomErrors.InsufficientEscrowBalance(token, 0, amount, address(this).balance);
            }
            
            (bool success, ) = payable(recipient).call{value: amount}("");
            if (!success) {
                revert CustomErrors.FeePaymentFailed(recipient, amount);
            }
        } else {
            // Withdraw ERC20 token
            uint256 balance = IERC20(token).balanceOf(address(this));
            if (balance < amount) {
                revert CustomErrors.InsufficientEscrowBalance(token, 0, amount, balance);
            }
            
            IERC20(token).safeTransfer(recipient, amount);
        }
        
        emit FeesWithdrawn(token, amount, recipient, msg.sender);
    }
    
    /**
     * @dev Emergency withdrawal of all fees (admin only)
     * @param recipient The withdrawal recipient
     */
    function emergencyWithdrawAllFees(address recipient) 
        external 
        onlyAdmin 
        nonReentrant 
    {
        if (recipient == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        // Withdraw native balance
        uint256 nativeBalance = address(this).balance;
        if (nativeBalance > 0) {
            (bool success, ) = payable(recipient).call{value: nativeBalance}("");
            if (!success) {
                revert CustomErrors.FeePaymentFailed(recipient, nativeBalance);
            }
            emit FeesWithdrawn(address(0), nativeBalance, recipient, msg.sender);
        }
        
        // Note: ERC20 tokens would need to be withdrawn individually
        // as we don't track all possible tokens that might be sent to this contract
    }
    
    // ============ VIEW FUNCTIONS ============
    
    /**
     * @dev Gets fee configuration for a chain
     * @param chainId The chain ID
     * @return config The fee configuration
     */
    function getFeeConfig(uint256 chainId) 
        external 
        view 
        override 
        returns (DataStructures.FeeConfig memory config) 
    {
        return _feeConfigs[chainId];
    }
    
    /**
     * @dev Checks if an account is fee exempt
     * @param account The account to check
     * @return exempt Whether the account is exempt
     */
    function isFeeExempt(address account) 
        external 
        view 
        override 
        returns (bool exempt) 
    {
        return _feeExemptions[account];
    }
    
    /**
     * @dev Gets total fees collected for a token
     * @param token The token address (0x0 for native)
     * @return total The total fees collected
     */
    function getTotalFeesCollected(address token) 
        external 
        view 
        override 
        returns (uint256 total) 
    {
        return _totalFeesCollected[token];
    }
    
    /**
     * @dev Gets fee collected for a specific offer
     * @param offerId The offer ID
     * @return fee The fee amount collected
     */
    function getOfferFee(uint256 offerId) external view returns (uint256 fee) {
        return _offerFees[offerId];
    }
    
    /**
     * @dev Gets supported fee tokens for a chain
     * @param chainId The chain ID
     * @return tokens Array of supported fee token addresses
     */
    function getSupportedFeeTokens(uint256 chainId) 
        external 
        view 
        returns (address[] memory tokens) 
    {
        return _supportedFeeTokens[chainId];
    }
    
    /**
     * @dev Gets fee manager statistics
     * @return totalOffers Total offers processed
     * @return totalVolume Total fee volume
     * @return totalChains Number of chains with fee configuration
     */
    function getFeeManagerStats() 
        external 
        view 
        returns (uint256 totalOffers, uint256 totalVolume, uint256 totalChains) 
    {
        totalOffers = totalOffersProcessed;
        totalVolume = totalFeeVolume;
        
        // Count chains with fee configuration
        uint256[] memory supportedChains = new uint256[](6);
        supportedChains[0] = Constants.ETHEREUM_CHAIN_ID;
        supportedChains[1] = Constants.ARBITRUM_CHAIN_ID;
        supportedChains[2] = Constants.POLYGON_CHAIN_ID;
        supportedChains[3] = Constants.OPTIMISM_CHAIN_ID;
        supportedChains[4] = Constants.BASE_CHAIN_ID;
        supportedChains[5] = block.chainid;
        
        for (uint256 i = 0; i < supportedChains.length; i++) {
            if (_feeConfigs[supportedChains[i]].feeEnabled) {
                totalChains++;
            }
        }
    }
    
    // ============ INTERNAL FUNCTIONS ============
    
    /**
     * @dev Initializes default fee configurations
     */
    function _initializeDefaultFeeConfigs() internal {
        // Ethereum configuration
        _feeConfigs[Constants.ETHEREUM_CHAIN_ID] = DataStructures.FeeConfig({
            platformFeePercent: Constants.DEFAULT_PLATFORM_FEE,
            minimumFee: Constants.ETHEREUM_MIN_FEE,
            feeRecipient: msg.sender, // Will be updated by admin
            feeEnabled: true,
            preferredFeeToken: address(0) // Native ETH
        });
        
        // Polygon configuration
        _feeConfigs[Constants.POLYGON_CHAIN_ID] = DataStructures.FeeConfig({
            platformFeePercent: Constants.DEFAULT_PLATFORM_FEE,
            minimumFee: Constants.POLYGON_MIN_FEE,
            feeRecipient: msg.sender,
            feeEnabled: true,
            preferredFeeToken: address(0) // Native MATIC
        });
        
        // Arbitrum configuration
        _feeConfigs[Constants.ARBITRUM_CHAIN_ID] = DataStructures.FeeConfig({
            platformFeePercent: Constants.DEFAULT_PLATFORM_FEE,
            minimumFee: Constants.ARBITRUM_MIN_FEE,
            feeRecipient: msg.sender,
            feeEnabled: true,
            preferredFeeToken: address(0) // Native ETH
        });
        
        // Optimism configuration
        _feeConfigs[Constants.OPTIMISM_CHAIN_ID] = DataStructures.FeeConfig({
            platformFeePercent: Constants.DEFAULT_PLATFORM_FEE,
            minimumFee: Constants.OPTIMISM_MIN_FEE,
            feeRecipient: msg.sender,
            feeEnabled: true,
            preferredFeeToken: address(0) // Native ETH
        });
        
        // Base configuration
        _feeConfigs[Constants.BASE_CHAIN_ID] = DataStructures.FeeConfig({
            platformFeePercent: Constants.DEFAULT_PLATFORM_FEE,
            minimumFee: Constants.BASE_MIN_FEE,
            feeRecipient: msg.sender,
            feeEnabled: true,
            preferredFeeToken: address(0) // Native ETH
        });
    }
    
    /**
     * @dev Checks if a token is supported for fees on a chain
     * @param chainId The chain ID
     * @param token The token address
     * @return supported Whether the token is supported
     */
    function _isSupportedFeeToken(uint256 chainId, address token) 
        internal 
        view 
        returns (bool supported) 
    {
        address[] memory tokens = _supportedFeeTokens[chainId];
        for (uint256 i = 0; i < tokens.length; i++) {
            if (tokens[i] == token) {
                return true;
            }
        }
        return false;
    }
    
    /**
     * @dev Returns the version of the contract
     * @return version The contract version
     */
    function version() external pure returns (string memory) {
        return "1.0.0";
    }
    
    // ============ RECEIVE FUNCTION ============
    
    /**
     * @dev Allows contract to receive native tokens
     */
    receive() external payable {
        // Allow contract to receive native tokens for fee collection
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts-upgradeable/utils/ReentrancyGuardUpgradeable.sol";
import "../interfaces/IOfferManager.sol";
import "../libraries/DataStructures.sol";
import "../libraries/Constants.sol";
import "../libraries/Errors.sol";
import "../libraries/SignatureLibrary.sol";
import "../libraries/AssetLibrary.sol";
import "../core/AccessControl.sol";
import "../security/AssetVerification.sol";

/**
 * @title OfferManager
 * @dev Trade offer lifecycle management for the Cross-Chain NFT Trading Platform
 * @author Blocklabs Studio
 */
contract OfferManager is 
    Initializable,
    ReentrancyGuardUpgradeable,
    IOfferManager
{
    
    // ============ STATE VARIABLES ============
    
    /// @dev Reference to the AccessControl contract
    AccessControl public accessControl;
    
    /// @dev Reference to the AssetVerification contract
    AssetVerification public assetVerification;
    
    /// @dev Mapping from offer ID to trade offer
    mapping(uint256 => DataStructures.TradeOffer) private _offers;
    
    /// @dev Mapping from creator address to their offer IDs
    mapping(address => uint256[]) private _creatorOffers;
    
    /// @dev Mapping from counterparty address to offers they can accept
    mapping(address => uint256[]) private _counterpartyOffers;
    
    /// @dev Array of all active offer IDs
    uint256[] private _activeOffers;
    
    /// @dev Mapping to track active offer indices for efficient removal
    mapping(uint256 => uint256) private _activeOfferIndices;
    
    /// @dev Next offer ID counter
    uint256 private _nextOfferId;
    
    /// @dev Total number of offers created
    uint256 public totalOffers;
    
    /// @dev EIP-712 domain separator
    bytes32 private _domainSeparator;
    
    /// @dev Mapping to track used nonces for signature replay protection
    mapping(address => mapping(uint256 => bool)) private _usedNonces;
    
    /// @dev Mapping to track offer expiration cleanup
    mapping(uint256 => bool) private _expiredOffers;
    
    // ============ EVENTS ============
    
    /**
     * @dev Emitted when an offer is created
     * @param offerId The unique offer identifier
     * @param creator The offer creator
     * @param mode The settlement mode (same-chain or cross-chain)
     * @param expirationTime The offer expiration time
     */
    event OfferCreated(
        uint256 indexed offerId,
        address indexed creator,
        DataStructures.SettlementMode mode,
        uint256 expirationTime
    );
    
    /**
     * @dev Emitted when an offer is accepted
     * @param offerId The unique offer identifier
     * @param acceptor The address that accepted the offer
     * @param settlementTime The expected settlement time
     */
    event OfferAccepted(
        uint256 indexed offerId,
        address indexed acceptor,
        uint256 settlementTime
    );
    
    /**
     * @dev Emitted when an offer is cancelled
     * @param offerId The unique offer identifier
     * @param creator The offer creator
     * @param reason The cancellation reason
     */
    event OfferCancelled(
        uint256 indexed offerId,
        address indexed creator,
        string reason
    );
    
    /**
     * @dev Emitted when an offer expires
     * @param offerId The unique offer identifier
     * @param expirationTime The expiration timestamp
     */
    event OfferExpired(
        uint256 indexed offerId,
        uint256 expirationTime
    );
    
    /**
     * @dev Emitted when a counter-offer is created
     * @param originalOfferId The original offer ID
     * @param counterOfferId The counter-offer ID
     * @param creator The counter-offer creator
     */
    event CounterOfferCreated(
        uint256 indexed originalOfferId,
        uint256 indexed counterOfferId,
        address indexed creator
    );
    
    /**
     * @dev Emitted when offer cleanup is performed
     * @param cleanedOffers Number of offers cleaned up
     * @param cleanedBy The address that performed cleanup
     */
    event OfferCleanupPerformed(
        uint256 cleanedOffers,
        address indexed cleanedBy
    );
    
    // ============ MODIFIERS ============
    
    /**
     * @dev Modifier to ensure contract is not paused
     */
    modifier whenNotPaused() {
        if (accessControl.paused()) {
            revert CustomErrors.ContractPaused();
        }
        _;
    }
    
    /**
     * @dev Modifier to check if caller has admin role
     */
    modifier onlyAdmin() {
        if (!accessControl.hasRole(Constants.ADMIN_ROLE, msg.sender)) {
            revert CustomErrors.UnauthorizedAccess(msg.sender, Constants.ADMIN_ROLE);
        }
        _;
    }
    
    /**
     * @dev Modifier to validate offer exists and is not expired
     */
    modifier validOffer(uint256 offerId) {
        if (offerId == 0 || offerId >= _nextOfferId) {
            revert CustomErrors.OfferNotFound(offerId);
        }
        
        DataStructures.TradeOffer storage offer = _offers[offerId];
        if (offer.status == DataStructures.OfferStatus.EXPIRED || 
            block.timestamp > offer.expirationTime) {
            revert CustomErrors.OfferExpired(offerId, offer.expirationTime);
        }
        _;
    }
    
    // ============ INITIALIZATION ============
    
    /**
     * @dev Initializes the OfferManager contract
     * @param _accessControl Address of the AccessControl contract
     * @param _assetVerification Address of the AssetVerification contract
     */
    function initialize(address _accessControl, address _assetVerification) public initializer {
        if (_accessControl == address(0) || _assetVerification == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        __ReentrancyGuard_init();
        
        accessControl = AccessControl(_accessControl);
        assetVerification = AssetVerification(_assetVerification);
        
        _nextOfferId = 1; // Start from 1, 0 is reserved for null
        
        // Initialize EIP-712 domain separator
        _domainSeparator = SignatureLibrary.buildDomainSeparator(address(this), block.chainid);
    }
    
    // ============ CORE FUNCTIONS ============
    
    /**
     * @dev Creates a new trade offer
     * @param offer The trade offer details
     * @return offerId The unique identifier for the created offer
     */
    function createOffer(DataStructures.TradeOffer calldata offer) 
        external 
        override 
        nonReentrant 
        whenNotPaused 
        returns (uint256 offerId) 
    {
        // Validate offer parameters
        (bool valid, string memory reason) = validateOffer(offer);
        if (!valid) {
            revert CustomErrors.InvalidOfferParameters(reason);
        }
        
        // Verify signature if provided
        if (offer.signature.length > 0) {
            _verifyOfferSignature(offer);
        }
        
        // Assign offer ID
        offerId = _nextOfferId++;
        
        // Create offer with assigned ID
        DataStructures.TradeOffer storage newOffer = _offers[offerId];
        newOffer.offerId = offerId;
        newOffer.creator = offer.creator;
        newOffer.counterparty = offer.counterparty;
        newOffer.expirationTime = offer.expirationTime;
        newOffer.sourceChainId = offer.sourceChainId;
        newOffer.destinationChainId = offer.destinationChainId;
        newOffer.settlementMode = offer.settlementMode;
        newOffer.signature = offer.signature;
        newOffer.status = DataStructures.OfferStatus.PENDING;
        newOffer.createdAt = block.timestamp;
        newOffer.nonce = offer.nonce;
        
        // Copy asset arrays
        for (uint256 i = 0; i < offer.offeredAssets.length; i++) {
            newOffer.offeredAssets.push(offer.offeredAssets[i]);
        }
        for (uint256 i = 0; i < offer.requestedAssets.length; i++) {
            newOffer.requestedAssets.push(offer.requestedAssets[i]);
        }
        
        // Update tracking mappings
        _creatorOffers[offer.creator].push(offerId);
        
        if (offer.counterparty != address(0)) {
            _counterpartyOffers[offer.counterparty].push(offerId);
        }
        
        // Add to active offers
        _activeOfferIndices[offerId] = _activeOffers.length;
        _activeOffers.push(offerId);
        
        // Mark nonce as used if signature provided
        if (offer.signature.length > 0) {
            _usedNonces[offer.creator][offer.nonce] = true;
        }
        
        totalOffers++;
        
        emit OfferCreated(offerId, offer.creator, offer.settlementMode, offer.expirationTime);
        
        return offerId;
    }
    
    /**
     * @dev Accepts a trade offer
     * @param offerId The unique identifier of the offer to accept
     * @param acceptor The address accepting the offer
     */
    function acceptOffer(uint256 offerId, address acceptor) 
        external 
        override 
        nonReentrant 
        whenNotPaused 
        validOffer(offerId) 
    {
        DataStructures.TradeOffer storage offer = _offers[offerId];
        
        // Validate acceptance
        (bool canAccept, string memory reason) = canAcceptOffer(offerId, acceptor);
        if (!canAccept) {
            revert CustomErrors.UnauthorizedOfferAcceptance(offerId, acceptor, offer.counterparty);
        }
        
        // Update offer status
        offer.status = DataStructures.OfferStatus.ACCEPTED;
        
        // Remove from active offers
        _removeFromActiveOffers(offerId);
        
        // Calculate settlement time based on mode
        uint256 settlementTime;
        if (offer.settlementMode == DataStructures.SettlementMode.SAME_CHAIN) {
            settlementTime = block.timestamp + Constants.SAME_CHAIN_TIMEOUT;
        } else {
            settlementTime = block.timestamp + Constants.CROSS_CHAIN_TIMEOUT;
        }
        
        emit OfferAccepted(offerId, acceptor, settlementTime);
    }
    
    /**
     * @dev Cancels a trade offer
     * @param offerId The unique identifier of the offer to cancel
     * @param caller The address requesting cancellation
     */
    function cancelOffer(uint256 offerId, address caller) 
        external 
        override 
        nonReentrant 
        whenNotPaused 
        validOffer(offerId) 
    {
        DataStructures.TradeOffer storage offer = _offers[offerId];
        
        // Only creator or admin can cancel
        if (caller != offer.creator && !accessControl.hasRole(Constants.ADMIN_ROLE, caller)) {
            revert CustomErrors.UnauthorizedAccess(caller, Constants.ADMIN_ROLE);
        }
        
        // Update offer status
        offer.status = DataStructures.OfferStatus.CANCELLED;
        
        // Remove from active offers
        _removeFromActiveOffers(offerId);
        
        string memory reason = caller == offer.creator ? "Cancelled by creator" : "Cancelled by admin";
        
        emit OfferCancelled(offerId, offer.creator, reason);
    }
    
    /**
     * @dev Creates a counter-offer for an existing offer
     * @param originalOfferId The unique identifier of the original offer
     * @param counterOffer The counter-offer details
     * @return counterOfferId The unique identifier for the counter-offer
     */
    function createCounterOffer(uint256 originalOfferId, DataStructures.TradeOffer calldata counterOffer) 
        external 
        override 
        nonReentrant 
        whenNotPaused 
        validOffer(originalOfferId) 
        returns (uint256 counterOfferId) 
    {
        DataStructures.TradeOffer storage originalOffer = _offers[originalOfferId];
        
        // Validate counter-offer creator
        if (counterOffer.creator != originalOffer.counterparty && originalOffer.counterparty != address(0)) {
            revert CustomErrors.UnauthorizedOfferAcceptance(originalOfferId, counterOffer.creator, originalOffer.counterparty);
        }
        
        // Create the counter-offer
        counterOfferId = this.createOffer(counterOffer);
        
        emit CounterOfferCreated(originalOfferId, counterOfferId, counterOffer.creator);
        
        return counterOfferId;
    }
    
    // ============ VALIDATION FUNCTIONS ============
    
    /**
     * @dev Validates a trade offer
     * @param offer The offer to validate
     * @return valid Whether the offer is valid
     * @return reason Reason if offer is invalid
     */
    function validateOffer(DataStructures.TradeOffer calldata offer) 
        public 
        view 
        override 
        returns (bool valid, string memory reason) 
    {
        // Check creator is not zero address
        if (offer.creator == address(0)) {
            return (false, "Creator cannot be zero address");
        }
        
        // Check expiration time
        if (offer.expirationTime <= block.timestamp) {
            return (false, "Offer already expired");
        }
        
        if (offer.expirationTime > block.timestamp + Constants.MAX_OFFER_DURATION) {
            return (false, "Offer duration too long");
        }
        
        // Check asset arrays
        if (offer.offeredAssets.length == 0) {
            return (false, "No offered assets");
        }
        
        if (offer.requestedAssets.length == 0) {
            return (false, "No requested assets");
        }
        
        if (offer.offeredAssets.length > Constants.MAX_ASSETS_PER_OFFER) {
            return (false, "Too many offered assets");
        }
        
        if (offer.requestedAssets.length > Constants.MAX_ASSETS_PER_OFFER) {
            return (false, "Too many requested assets");
        }
        
        // Validate each offered asset
        for (uint256 i = 0; i < offer.offeredAssets.length; i++) {
            (bool assetValid, string memory assetReason) = AssetLibrary.validateAsset(offer.offeredAssets[i]);
            if (!assetValid) {
                return (false, string(abi.encodePacked("Invalid offered asset: ", assetReason)));
            }
            
            // Verify asset ownership
            if (!AssetLibrary.verifyOwnership(offer.offeredAssets[i], offer.creator)) {
                return (false, "Creator does not own offered asset");
            }
        }
        
        // Validate each requested asset
        for (uint256 i = 0; i < offer.requestedAssets.length; i++) {
            (bool assetValid, string memory assetReason) = AssetLibrary.validateAsset(offer.requestedAssets[i]);
            if (!assetValid) {
                return (false, string(abi.encodePacked("Invalid requested asset: ", assetReason)));
            }
        }
        
        // Validate settlement mode and chain IDs
        if (offer.settlementMode == DataStructures.SettlementMode.CROSS_CHAIN) {
            if (offer.destinationChainId == 0 || offer.destinationChainId == offer.sourceChainId) {
                return (false, "Invalid cross-chain configuration");
            }
        } else {
            if (offer.destinationChainId != 0) {
                return (false, "Same-chain offers should not have destination chain");
            }
        }
        
        return (true, "");
    }
    
    /**
     * @dev Checks if an offer can be accepted by a specific address
     * @param offerId The unique identifier of the offer
     * @param acceptor The address wanting to accept the offer
     * @return canAccept Whether the offer can be accepted
     * @return reason Reason if offer cannot be accepted
     */
    function canAcceptOffer(uint256 offerId, address acceptor) 
        public 
        view 
        override 
        returns (bool canAccept, string memory reason) 
    {
        if (offerId == 0 || offerId >= _nextOfferId) {
            return (false, "Offer does not exist");
        }
        
        DataStructures.TradeOffer storage offer = _offers[offerId];
        
        // Check offer status
        if (offer.status != DataStructures.OfferStatus.PENDING) {
            return (false, "Offer is not pending");
        }
        
        // Check expiration
        if (block.timestamp > offer.expirationTime) {
            return (false, "Offer has expired");
        }
        
        // Check if acceptor is the creator
        if (acceptor == offer.creator) {
            return (false, "Creator cannot accept own offer");
        }
        
        // Check counterparty restriction
        if (offer.counterparty != address(0) && acceptor != offer.counterparty) {
            return (false, "Offer is restricted to specific counterparty");
        }
        
        // Verify acceptor owns requested assets
        for (uint256 i = 0; i < offer.requestedAssets.length; i++) {
            if (!AssetLibrary.verifyOwnership(offer.requestedAssets[i], acceptor)) {
                return (false, "Acceptor does not own required assets");
            }
        }
        
        return (true, "");
    }
    
    /**
     * @dev Checks if an offer has expired
     * @param offerId The unique identifier of the offer
     * @return expired Whether the offer has expired
     */
    function isOfferExpired(uint256 offerId) 
        external 
        view 
        override 
        returns (bool expired) 
    {
        if (offerId == 0 || offerId >= _nextOfferId) {
            return true;
        }
        
        DataStructures.TradeOffer storage offer = _offers[offerId];
        return block.timestamp > offer.expirationTime;
    }
    
    // ============ VIEW FUNCTIONS ============
    
    /**
     * @dev Gets a trade offer by ID
     * @param offerId The unique identifier of the offer
     * @return offer The trade offer
     */
    function getOffer(uint256 offerId) 
        external 
        view 
        override 
        returns (DataStructures.TradeOffer memory offer) 
    {
        if (offerId == 0 || offerId >= _nextOfferId) {
            revert CustomErrors.OfferNotFound(offerId);
        }
        
        return _offers[offerId];
    }
    
    /**
     * @dev Gets offers created by a specific address
     * @param creator The creator address
     * @return offerIds Array of offer IDs created by the address
     */
    function getOffersByCreator(address creator) 
        external 
        view 
        override 
        returns (uint256[] memory offerIds) 
    {
        return _creatorOffers[creator];
    }
    
    /**
     * @dev Gets all active offer IDs
     * @return offerIds Array of active offer IDs
     */
    function getActiveOffers() 
        external 
        view 
        override 
        returns (uint256[] memory offerIds) 
    {
        return _activeOffers;
    }
    
    /**
     * @dev Gets the total number of offers created
     * @return total The total number of offers
     */
    function getTotalOffers() 
        external 
        view 
        override 
        returns (uint256 total) 
    {
        return totalOffers;
    }
    
    /**
     * @dev Gets the next offer ID that will be assigned
     * @return nextId The next offer ID
     */
    function getNextOfferId() external view returns (uint256 nextId) {
        return _nextOfferId;
    }
    
    /**
     * @dev Gets offers available to a specific counterparty
     * @param counterparty The counterparty address
     * @return offerIds Array of offer IDs available to the counterparty
     */
    function getCounterpartyOffers(address counterparty) 
        external 
        view 
        returns (uint256[] memory offerIds) 
    {
        return _counterpartyOffers[counterparty];
    }
    
    // ============ MAINTENANCE FUNCTIONS ============
    
    /**
     * @dev Cleans up expired offers (admin only)
     * @param maxCleanup Maximum number of offers to clean up in one call
     * @return cleanedCount Number of offers cleaned up
     */
    function cleanupExpiredOffers(uint256 maxCleanup) 
        external 
        onlyAdmin 
        nonReentrant 
        returns (uint256 cleanedCount) 
    {
        uint256 cleaned = 0;
        uint256 i = 0;
        
        while (i < _activeOffers.length && cleaned < maxCleanup) {
            uint256 offerId = _activeOffers[i];
            DataStructures.TradeOffer storage offer = _offers[offerId];
            
            if (block.timestamp > offer.expirationTime && !_expiredOffers[offerId]) {
                offer.status = DataStructures.OfferStatus.EXPIRED;
                _expiredOffers[offerId] = true;
                
                // Remove from active offers
                _removeFromActiveOffers(offerId);
                
                emit OfferExpired(offerId, offer.expirationTime);
                cleaned++;
            } else {
                i++;
            }
        }
        
        if (cleaned > 0) {
            emit OfferCleanupPerformed(cleaned, msg.sender);
        }
        
        return cleaned;
    }
    
    /**
     * @dev Updates the domain separator (admin only)
     */
    function updateDomainSeparator() external onlyAdmin {
        _domainSeparator = SignatureLibrary.buildDomainSeparator(address(this), block.chainid);
    }
    
    // ============ INTERNAL FUNCTIONS ============
    
    /**
     * @dev Verifies an offer signature
     * @param offer The offer to verify
     */
    function _verifyOfferSignature(DataStructures.TradeOffer calldata offer) internal view {
        if (!SignatureLibrary.validateSignatureFormat(offer.signature)) {
            revert CustomErrors.InvalidSignatureFormat();
        }
        
        if (_usedNonces[offer.creator][offer.nonce]) {
            revert CustomErrors.NonceAlreadyUsed(offer.creator, offer.nonce);
        }
        
        (address signer, bool isValid) = SignatureLibrary.verifyOfferSignature(
            offer,
            offer.signature,
            _domainSeparator
        );
        
        if (!isValid || signer != offer.creator) {
            revert CustomErrors.InvalidSignature(signer, SignatureLibrary.hashTradeOffer(offer));
        }
    }
    
    /**
     * @dev Removes an offer from the active offers array
     * @param offerId The offer ID to remove
     */
    function _removeFromActiveOffers(uint256 offerId) internal {
        uint256 index = _activeOfferIndices[offerId];
        uint256 lastIndex = _activeOffers.length - 1;
        
        if (index != lastIndex) {
            uint256 lastOfferId = _activeOffers[lastIndex];
            _activeOffers[index] = lastOfferId;
            _activeOfferIndices[lastOfferId] = index;
        }
        
        _activeOffers.pop();
        delete _activeOfferIndices[offerId];
    }
    
    /**
     * @dev Returns the version of the contract
     * @return version The contract version
     */
    function version() external pure returns (string memory) {
        return "1.0.0";
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts-upgradeable/utils/ReentrancyGuardUpgradeable.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "../libraries/DataStructures.sol";
import "../libraries/Constants.sol";
import "../libraries/Errors.sol";
import "../core/AccessControl.sol";

/**
 * @dev Interface for ERC721C contracts
 */
interface IERC721C {
    function getTransferPolicy() external view returns (uint8);
    function isWhitelisted(address operator) external view returns (bool);
    function royaltyInfo(uint256 tokenId, uint256 salePrice) external view returns (address, uint256);
    function owner() external view returns (address);
}

/**
 * @title ERC721CIntegration
 * @dev Creator royalty enforcement integration for ERC721C tokens
 * @author Blocklabs Studio
 */
contract ERC721CIntegration is
    Initializable,
    ReentrancyGuardUpgradeable
{
    using SafeERC20 for IERC20;
    
    // ============ STATE VARIABLES ============
    
    /// @dev Reference to the AccessControl contract
    AccessControl public accessControl;
    
    /// @dev Mapping of ERC721C contracts to their whitelist status
    mapping(address => bool) private _whitelistedContracts;
    
    /// @dev Mapping of ERC721C contracts to their royalty configurations
    mapping(address => RoyaltyConfig) private _royaltyConfigs;
    
    /// @dev Mapping to track collected royalties per token contract
    mapping(address => uint256) private _collectedRoyalties;
    
    /// @dev Mapping to track royalty payments per trade
    mapping(uint256 => RoyaltyPayment[]) private _tradeRoyalties;
    
    /// @dev Total royalties collected across all contracts
    uint256 public totalRoyaltiesCollected;
    
    /// @dev Total number of royalty payments made
    uint256 public totalRoyaltyPayments;
    
    // ============ STRUCTS ============
    
    struct RoyaltyConfig {
        bool enforceRoyalties;      // Whether to enforce royalty payments
        uint256 maxRoyaltyPercent;  // Maximum royalty percentage (basis points)
        address defaultRecipient;   // Default royalty recipient if not specified
        bool requireWhitelist;      // Whether trading requires whitelist approval
    }
    
    struct RoyaltyPayment {
        address tokenContract;      // The NFT contract
        uint256 tokenId;           // The token ID
        address recipient;         // Royalty recipient
        uint256 amount;            // Royalty amount paid
        address paymentToken;      // Token used for payment (0x0 for native)
        uint256 timestamp;         // Payment timestamp
    }
    
    // ============ EVENTS ============
    
    /**
     * @dev Emitted when a contract is whitelisted for trading
     * @param tokenContract The token contract address
     * @param whitelisted Whether the contract is whitelisted
     * @param whitelistedBy The address that performed the whitelisting
     */
    event ContractWhitelisted(
        address indexed tokenContract,
        bool whitelisted,
        address indexed whitelistedBy
    );
    
    /**
     * @dev Emitted when royalty configuration is updated
     * @param tokenContract The token contract address
     * @param config The new royalty configuration
     * @param updatedBy The address that updated the configuration
     */
    event RoyaltyConfigUpdated(
        address indexed tokenContract,
        RoyaltyConfig config,
        address indexed updatedBy
    );
    
    /**
     * @dev Emitted when royalties are paid
     * @param offerId The trade offer ID
     * @param tokenContract The NFT contract
     * @param tokenId The token ID
     * @param recipient The royalty recipient
     * @param amount The royalty amount
     * @param paymentToken The payment token (0x0 for native)
     */
    event RoyaltyPaid(
        uint256 indexed offerId,
        address indexed tokenContract,
        uint256 indexed tokenId,
        address recipient,
        uint256 amount,
        address paymentToken
    );
    
    /**
     * @dev Emitted when trading policy is checked
     * @param tokenContract The token contract address
     * @param operator The trading operator
     * @param allowed Whether trading is allowed
     * @param policy The transfer policy
     */
    event TradingPolicyChecked(
        address indexed tokenContract,
        address indexed operator,
        bool allowed,
        uint8 policy
    );
    
    // ============ MODIFIERS ============
    
    /**
     * @dev Modifier to check if caller has project admin role
     */
    modifier onlyProjectAdmin() {
        if (!accessControl.hasRole(Constants.PROJECT_ADMIN_ROLE, msg.sender) && 
            !accessControl.hasRole(Constants.ADMIN_ROLE, msg.sender)) {
            revert CustomErrors.UnauthorizedAccess(msg.sender, Constants.PROJECT_ADMIN_ROLE);
        }
        _;
    }
    
    /**
     * @dev Modifier to ensure contract is not paused
     */
    modifier whenNotPaused() {
        if (accessControl.paused()) {
            revert CustomErrors.ContractPaused();
        }
        _;
    }
    
    // ============ INITIALIZATION ============
    
    /**
     * @dev Initializes the ERC721CIntegration contract
     * @param _accessControl Address of the AccessControl contract
     */
    function initialize(address _accessControl) public initializer {
        if (_accessControl == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        __ReentrancyGuard_init();
        
        accessControl = AccessControl(_accessControl);
    }
    
    // ============ CORE FUNCTIONS ============
    
    /**
     * @dev Whitelists a trading contract for ERC721C tokens
     * @param nftContract The NFT contract address
     */
    function whitelistTradingContract(address nftContract) 
        external 
        onlyProjectAdmin 
        nonReentrant 
        whenNotPaused 
    {
        if (nftContract == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        // Check if contract supports ERC721C
        if (!_isERC721C(nftContract)) {
            revert CustomErrors.AssetStandardMismatch(nftContract, uint8(DataStructures.AssetType.ERC721));
        }
        
        _whitelistedContracts[nftContract] = true;
        
        emit ContractWhitelisted(nftContract, true, msg.sender);
    }
    
    /**
     * @dev Checks the transfer policy for an ERC721C contract
     * @param nftContract The NFT contract address
     * @return policy The transfer policy (0 = no restrictions, 1+ = restricted)
     */
    function checkTransferPolicy(address nftContract) 
        external 
        view 
        returns (uint8 policy) 
    {
        if (!_isERC721C(nftContract)) {
            return 0; // No restrictions for non-ERC721C contracts
        }
        
        try IERC721C(nftContract).getTransferPolicy() returns (uint8 transferPolicy) {
            return transferPolicy;
        } catch {
            return 0; // Default to no restrictions if call fails
        }
    }
    
    /**
     * @dev Checks if an operator is whitelisted for trading
     * @param nftContract The NFT contract address
     * @param operator The operator address
     * @return whitelisted Whether the operator is whitelisted
     */
    function isWhitelisted(address nftContract, address operator) 
        external 
        view 
        returns (bool whitelisted) 
    {
        // Check if our trading contract is whitelisted
        if (_whitelistedContracts[nftContract]) {
            return true;
        }
        
        // Check ERC721C whitelist
        if (_isERC721C(nftContract)) {
            try IERC721C(nftContract).isWhitelisted(operator) returns (bool isWhitelistedOperator) {
                return isWhitelistedOperator;
            } catch {
                return false;
            }
        }
        
        return false;
    }
    
    /**
     * @dev Validates trading is allowed for an ERC721C token
     * @param nftContract The NFT contract address
     * @param operator The trading operator
     * @return allowed Whether trading is allowed
     * @return reason Reason if trading is not allowed
     */
    function validateTrading(address nftContract, address operator) 
        external 
        view 
        returns (bool allowed, string memory reason) 
    {
        if (!_isERC721C(nftContract)) {
            return (true, "Not an ERC721C contract");
        }
        
        // Check transfer policy
        uint8 policy = this.checkTransferPolicy(nftContract);
        
        if (policy == 0) {
            return (true, "No transfer restrictions");
        }
        
        // Check if operator is whitelisted
        bool whitelisted = this.isWhitelisted(nftContract, operator);
        
        if (!whitelisted) {
            return (false, "Operator not whitelisted for restricted contract");
        }
        
        return (true, "Operator whitelisted");
    }
    
    /**
     * @dev Calculates and processes royalty payment for a trade
     * @param offerId The trade offer ID
     * @param nftContract The NFT contract address
     * @param tokenId The token ID
     * @param salePrice The sale price
     * @param paymentToken The payment token (0x0 for native)
     * @return royaltyAmount The calculated royalty amount
     */
    function processRoyaltyPayment(
        uint256 offerId,
        address nftContract,
        uint256 tokenId,
        uint256 salePrice,
        address paymentToken
    ) external payable nonReentrant whenNotPaused returns (uint256 royaltyAmount) {
        if (nftContract == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        // Get royalty configuration
        RoyaltyConfig memory config = _royaltyConfigs[nftContract];
        
        if (!config.enforceRoyalties) {
            return 0; // No royalties to collect
        }
        
        // Calculate royalty amount
        (address recipient, uint256 amount) = _calculateRoyalty(nftContract, tokenId, salePrice);
        
        if (amount == 0 || recipient == address(0)) {
            return 0; // No royalty to pay
        }
        
        // Validate royalty amount doesn't exceed maximum
        uint256 maxRoyalty = (salePrice * config.maxRoyaltyPercent) / Constants.BASIS_POINTS;
        if (amount > maxRoyalty) {
            amount = maxRoyalty;
        }
        
        // Process payment
        if (paymentToken == address(0)) {
            // Native token payment
            if (msg.value < amount) {
                revert CustomErrors.InsufficientFee(msg.value, amount);
            }
            
            (bool success, ) = payable(recipient).call{value: amount}("");
            if (!success) {
                revert CustomErrors.FeePaymentFailed(recipient, amount);
            }
            
            // Refund excess
            if (msg.value > amount) {
                (bool refundSuccess, ) = payable(msg.sender).call{value: msg.value - amount}("");
                if (!refundSuccess) {
                    revert CustomErrors.FeePaymentFailed(msg.sender, msg.value - amount);
                }
            }
        } else {
            // ERC20 token payment
            IERC20(paymentToken).safeTransferFrom(msg.sender, recipient, amount);
        }
        
        // Record royalty payment
        _tradeRoyalties[offerId].push(RoyaltyPayment({
            tokenContract: nftContract,
            tokenId: tokenId,
            recipient: recipient,
            amount: amount,
            paymentToken: paymentToken,
            timestamp: block.timestamp
        }));
        
        // Update statistics
        _collectedRoyalties[nftContract] += amount;
        totalRoyaltiesCollected += amount;
        totalRoyaltyPayments++;
        
        emit RoyaltyPaid(offerId, nftContract, tokenId, recipient, amount, paymentToken);
        
        return amount;
    }
    
    // ============ CONFIGURATION FUNCTIONS ============
    
    /**
     * @dev Sets royalty configuration for a contract
     * @param nftContract The NFT contract address
     * @param config The royalty configuration
     */
    function setRoyaltyConfig(address nftContract, RoyaltyConfig calldata config) 
        external 
        onlyProjectAdmin 
        nonReentrant 
        whenNotPaused 
    {
        if (nftContract == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        if (config.maxRoyaltyPercent > Constants.MAX_ROYALTY_PERCENT) {
            revert CustomErrors.FeePercentageTooHigh(config.maxRoyaltyPercent, Constants.MAX_ROYALTY_PERCENT);
        }
        
        _royaltyConfigs[nftContract] = config;
        
        emit RoyaltyConfigUpdated(nftContract, config, msg.sender);
    }
    
    /**
     * @dev Batch whitelists multiple contracts
     * @param nftContracts Array of NFT contract addresses
     * @param whitelisted Array of whitelist statuses
     */
    function batchWhitelistContracts(
        address[] calldata nftContracts,
        bool[] calldata whitelisted
    ) external onlyProjectAdmin nonReentrant whenNotPaused {
        if (nftContracts.length != whitelisted.length) {
            revert CustomErrors.ArrayLengthMismatch(nftContracts.length, whitelisted.length);
        }
        
        if (nftContracts.length == 0) {
            revert CustomErrors.EmptyArray();
        }
        
        for (uint256 i = 0; i < nftContracts.length; i++) {
            if (nftContracts[i] == address(0)) {
                revert CustomErrors.ZeroAddressNotAllowed();
            }
            
            _whitelistedContracts[nftContracts[i]] = whitelisted[i];
            
            emit ContractWhitelisted(nftContracts[i], whitelisted[i], msg.sender);
        }
    }
    
    // ============ VIEW FUNCTIONS ============
    
    /**
     * @dev Gets royalty configuration for a contract
     * @param nftContract The NFT contract address
     * @return config The royalty configuration
     */
    function getRoyaltyConfig(address nftContract) 
        external 
        view 
        returns (RoyaltyConfig memory config) 
    {
        return _royaltyConfigs[nftContract];
    }
    
    /**
     * @dev Gets total royalties collected for a contract
     * @param nftContract The NFT contract address
     * @return amount The total royalties collected
     */
    function getCollectedRoyalties(address nftContract) 
        external 
        view 
        returns (uint256 amount) 
    {
        return _collectedRoyalties[nftContract];
    }
    
    /**
     * @dev Gets royalty payments for a specific trade
     * @param offerId The trade offer ID
     * @return payments Array of royalty payments
     */
    function getTradeRoyalties(uint256 offerId) 
        external 
        view 
        returns (RoyaltyPayment[] memory payments) 
    {
        return _tradeRoyalties[offerId];
    }
    
    /**
     * @dev Checks if a contract is whitelisted
     * @param nftContract The NFT contract address
     * @return whitelisted Whether the contract is whitelisted
     */
    function isContractWhitelisted(address nftContract) 
        external 
        view 
        returns (bool whitelisted) 
    {
        return _whitelistedContracts[nftContract];
    }
    
    /**
     * @dev Gets royalty information for a token
     * @param nftContract The NFT contract address
     * @param tokenId The token ID
     * @param salePrice The sale price
     * @return recipient The royalty recipient
     * @return amount The royalty amount
     */
    function getRoyaltyInfo(address nftContract, uint256 tokenId, uint256 salePrice) 
        external 
        view 
        returns (address recipient, uint256 amount) 
    {
        return _calculateRoyalty(nftContract, tokenId, salePrice);
    }
    
    /**
     * @dev Gets integration statistics
     * @return totalContracts Number of whitelisted contracts
     * @return totalRoyalties Total royalties collected
     * @return totalPayments Total royalty payments made
     */
    function getIntegrationStats() 
        external 
        view 
        returns (uint256 totalContracts, uint256 totalRoyalties, uint256 totalPayments) 
    {
        // Count whitelisted contracts (simplified)
        totalContracts = 0; // Would need to track this separately in production
        totalRoyalties = totalRoyaltiesCollected;
        totalPayments = totalRoyaltyPayments;
    }
    
    // ============ INTERNAL FUNCTIONS ============
    
    /**
     * @dev Checks if a contract implements ERC721C
     * @param nftContract The contract to check
     * @return isERC721C Whether the contract is ERC721C
     */
    function _isERC721C(address nftContract) internal view returns (bool isERC721C) {
        try IERC721C(nftContract).getTransferPolicy() returns (uint8) {
            return true;
        } catch {
            return false;
        }
    }
    
    /**
     * @dev Calculates royalty for a token
     * @param nftContract The NFT contract address
     * @param tokenId The token ID
     * @param salePrice The sale price
     * @return recipient The royalty recipient
     * @return amount The royalty amount
     */
    function _calculateRoyalty(address nftContract, uint256 tokenId, uint256 salePrice) 
        internal 
        view 
        returns (address recipient, uint256 amount) 
    {
        // Try ERC2981 royalty standard first
        try IERC721C(nftContract).royaltyInfo(tokenId, salePrice) returns (address royaltyRecipient, uint256 royaltyAmount) {
            if (royaltyRecipient != address(0) && royaltyAmount > 0) {
                return (royaltyRecipient, royaltyAmount);
            }
        } catch {}
        
        // Fallback to configuration
        RoyaltyConfig memory config = _royaltyConfigs[nftContract];
        if (config.defaultRecipient != address(0)) {
            uint256 defaultAmount = (salePrice * config.maxRoyaltyPercent) / Constants.BASIS_POINTS;
            return (config.defaultRecipient, defaultAmount);
        }
        
        return (address(0), 0);
    }
    
    /**
     * @dev Returns the version of the contract
     * @return version The contract version
     */
    function version() external pure returns (string memory) {
        return "1.0.0";
    }
    
    /**
     * @dev Allows contract to receive native tokens for royalty payments
     */
    receive() external payable {
        // Allow contract to receive native tokens for royalty processing
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

import "../libraries/DataStructures.sol";

/**
 * @title IAssetVerification
 * @dev Interface for asset validation and verification
 * @author Blocklabs Studio
 */
interface IAssetVerification {
    
    // ============ EVENTS ============
    
    event AssetWhitelisted(address indexed tokenContract, bool whitelisted);
    event AssetBlacklisted(address indexed tokenContract, bool blacklisted);
    event ProjectConfigUpdated(address indexed tokenContract, DataStructures.ProjectConfig config);
    
    // ============ CORE FUNCTIONS ============
    
    function verifyAsset(DataStructures.Asset calldata asset, address owner) external view returns (DataStructures.AssetValidation memory);
    function verifyAssetOwnership(DataStructures.Asset calldata asset, address owner) external view returns (bool);
    function verifyAssetTransferability(DataStructures.Asset calldata asset, address from, address to) external view returns (bool);
    
    // ============ WHITELIST/BLACKLIST FUNCTIONS ============
    
    function setAssetWhitelist(address tokenContract, bool whitelisted) external;
    function setAssetBlacklist(address tokenContract, bool blacklisted) external;
    function setProjectConfig(address tokenContract, DataStructures.ProjectConfig calldata config) external;
    
    // ============ VIEW FUNCTIONS ============
    
    function isAssetWhitelisted(address tokenContract) external view returns (bool);
    function isAssetBlacklisted(address tokenContract) external view returns (bool);
    function getProjectConfig(address tokenContract) external view returns (DataStructures.ProjectConfig memory);
    function getSupportedAssetTypes() external view returns (DataStructures.AssetType[] memory);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

import "../libraries/DataStructures.sol";

/**
 * @title ICrossChainBridge
 * @dev Interface for LayerZero V2 cross-chain bridge integration
 * @author Blocklabs Studio
 */
interface ICrossChainBridge {
    
    // ============ EVENTS ============
    
    /**
     * @dev Emitted when a cross-chain message is sent
     * @param destinationChain Target chain ID
     * @param messageHash Hash of the sent message
     * @param gasLimit Gas limit for execution
     * @param gasUsed Actual gas used for sending
     */
    event MessageSent(
        uint256 indexed destinationChain,
        bytes32 indexed messageHash,
        uint256 gasLimit,
        uint256 gasUsed
    );

    /**
     * @dev Emitted when a cross-chain message is received
     * @param sourceChain Source chain ID
     * @param messageHash Hash of the received message
     * @param success Whether message execution was successful
     */
    event MessageReceived(
        uint256 indexed sourceChain,
        bytes32 indexed messageHash,
        bool success
    );

    /**
     * @dev Emitted when LayerZero endpoint is updated
     * @param chainId Chain ID
     * @param oldEndpoint Previous endpoint address
     * @param newEndpoint New endpoint address
     */
    event EndpointUpdated(
        uint256 indexed chainId,
        address oldEndpoint,
        address newEndpoint
    );

    /**
     * @dev Emitted when message retry is attempted
     * @param messageHash Hash of the message being retried
     * @param attempt Retry attempt number
     */
    event MessageRetry(
        bytes32 indexed messageHash,
        uint256 attempt
    );

    // ============ CORE FUNCTIONS ============

    /**
     * @dev Sends a cross-chain message via LayerZero
     * @param destinationChain Target chain ID
     * @param payload Message payload to send
     * @param gasLimit Gas limit for execution on destination
     * @return messageHash Hash of the sent message
     */
    function sendMessage(
        uint256 destinationChain,
        bytes calldata payload,
        uint256 gasLimit
    ) external payable returns (bytes32 messageHash);

    /**
     * @dev Receives and processes a cross-chain message
     * @param sourceChain Source chain ID
     * @param payload Message payload received
     * @return success Whether message processing was successful
     */
    function receiveMessage(
        uint256 sourceChain,
        bytes calldata payload
    ) external returns (bool success);

    /**
     * @dev Estimates gas cost for cross-chain message
     * @param destinationChain Target chain ID
     * @param payload Message payload
     * @return gasEstimate Estimated gas cost in native token
     */
    function estimateGas(
        uint256 destinationChain,
        bytes calldata payload
    ) external view returns (uint256 gasEstimate);

    /**
     * @dev Retries a failed cross-chain message
     * @param messageHash Hash of the message to retry
     * @param newGasLimit New gas limit for retry
     */
    function retryMessage(
        bytes32 messageHash,
        uint256 newGasLimit
    ) external payable;

    // ============ CONFIGURATION FUNCTIONS ============

    /**
     * @dev Sets LayerZero endpoint for a specific chain
     * @param chainId Chain ID
     * @param endpoint LayerZero endpoint address
     */
    function setLayerZeroEndpoint(uint256 chainId, address endpoint) external;

    /**
     * @dev Sets trusted remote for cross-chain communication
     * @param chainId Remote chain ID
     * @param remoteAddress Trusted remote contract address
     */
    function setTrustedRemote(uint256 chainId, address remoteAddress) external;

    /**
     * @dev Sets default gas limit for a destination chain
     * @param chainId Destination chain ID
     * @param gasLimit Default gas limit
     */
    function setDefaultGasLimit(uint256 chainId, uint256 gasLimit) external;

    /**
     * @dev Enables or disables cross-chain communication for a chain
     * @param chainId Chain ID
     * @param enabled Whether to enable communication
     */
    function setChainEnabled(uint256 chainId, bool enabled) external;

    // ============ BATCH OPERATIONS ============

    /**
     * @dev Sends multiple cross-chain messages in batch
     * @param destinations Array of destination chain IDs
     * @param payloads Array of message payloads
     * @param gasLimits Array of gas limits
     * @return messageHashes Array of message hashes
     */
    function sendBatchMessages(
        uint256[] calldata destinations,
        bytes[] calldata payloads,
        uint256[] calldata gasLimits
    ) external payable returns (bytes32[] memory messageHashes);

    /**
     * @dev Retries multiple failed messages in batch
     * @param messageHashes Array of message hashes to retry
     * @param gasLimits Array of new gas limits
     */
    function retryBatchMessages(
        bytes32[] calldata messageHashes,
        uint256[] calldata gasLimits
    ) external payable;

    // ============ VIEW FUNCTIONS ============

    /**
     * @dev Gets LayerZero endpoint for a specific chain
     * @param chainId Chain ID
     * @return endpoint LayerZero endpoint address
     */
    function getLayerZeroEndpoint(uint256 chainId) external view returns (address endpoint);

    /**
     * @dev Gets trusted remote address for a chain
     * @param chainId Remote chain ID
     * @return remoteAddress Trusted remote contract address
     */
    function getTrustedRemote(uint256 chainId) external view returns (address remoteAddress);

    /**
     * @dev Gets default gas limit for a destination chain
     * @param chainId Destination chain ID
     * @return gasLimit Default gas limit
     */
    function getDefaultGasLimit(uint256 chainId) external view returns (uint256 gasLimit);

    /**
     * @dev Checks if cross-chain communication is enabled for a chain
     * @param chainId Chain ID
     * @return enabled Whether communication is enabled
     */
    function isChainEnabled(uint256 chainId) external view returns (bool enabled);

    /**
     * @dev Gets message status and details
     * @param messageHash Hash of the message
     * @return status Message status (0=pending, 1=delivered, 2=failed)
     * @return retryCount Number of retry attempts
     * @return lastAttempt Timestamp of last attempt
     */
    function getMessageStatus(bytes32 messageHash) 
        external 
        view 
        returns (uint8 status, uint256 retryCount, uint256 lastAttempt);

    /**
     * @dev Gets all supported chain IDs
     * @return chainIds Array of supported chain IDs
     */
    function getSupportedChains() external view returns (uint256[] memory chainIds);

    /**
     * @dev Checks if a message hash has been processed
     * @param messageHash Hash of the message
     * @return processed Whether the message has been processed
     */
    function isMessageProcessed(bytes32 messageHash) external view returns (bool processed);

    /**
     * @dev Gets cross-chain bridge statistics
     * @return totalMessagesSent Total messages sent
     * @return totalMessagesReceived Total messages received
     * @return totalGasUsed Total gas used for cross-chain operations
     */
    function getBridgeStats() 
        external 
        view 
        returns (uint256 totalMessagesSent, uint256 totalMessagesReceived, uint256 totalGasUsed);

    // ============ EMERGENCY FUNCTIONS ============

    /**
     * @dev Emergency pause of cross-chain operations
     */
    function emergencyPause() external;

    /**
     * @dev Resume cross-chain operations after emergency pause
     */
    function emergencyUnpause() external;

    /**
     * @dev Emergency withdrawal of stuck native tokens
     * @param recipient Address to receive the tokens
     * @param amount Amount to withdraw
     */
    function emergencyWithdraw(address recipient, uint256 amount) external;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

import "../libraries/DataStructures.sol";

/**
 * @title IEscrowTrading
 * @dev Main interface for the Cross-Chain NFT Trading Platform
 * @author Blocklabs Studio
 */
interface IEscrowTrading {
    
    // ============ EVENTS ============
    
    /**
     * @dev Emitted when a new offer is created
     * @param offerId Unique offer identifier
     * @param creator Address of the offer creator
     * @param counterparty Address of specific counterparty (0x0 for open offers)
     * @param chainId Chain ID where offer is created
     */
    event OfferCreated(
        uint256 indexed offerId,
        address indexed creator,
        address indexed counterparty,
        uint256 chainId
    );

    /**
     * @dev Emitted when an offer is accepted
     * @param offerId Unique offer identifier
     * @param acceptor Address of the offer acceptor
     * @param settlementTime Timestamp when settlement will occur
     */
    event OfferAccepted(
        uint256 indexed offerId,
        address indexed acceptor,
        uint256 settlementTime
    );

    /**
     * @dev Emitted when an offer is cancelled
     * @param offerId Unique offer identifier
     * @param creator Address of the offer creator
     * @param timestamp Cancellation timestamp
     */
    event OfferCancelled(
        uint256 indexed offerId,
        address indexed creator,
        uint256 timestamp
    );

    /**
     * @dev Emitted when assets are deposited into escrow
     * @param offerId Associated offer identifier
     * @param depositor Address of the depositor
     * @param assets Array of deposited assets
     */
    event AssetsDeposited(
        uint256 indexed offerId,
        address indexed depositor,
        DataStructures.Asset[] assets
    );

    /**
     * @dev Emitted when assets are successfully swapped
     * @param offerId Unique offer identifier
     * @param party1 First party in the swap
     * @param party2 Second party in the swap
     * @param timestamp Swap completion timestamp
     */
    event AssetsSwapped(
        uint256 indexed offerId,
        address indexed party1,
        address indexed party2,
        uint256 timestamp
    );

    /**
     * @dev Emitted when fees are collected
     * @param offerId Associated offer identifier
     * @param token Fee token address (0x0 for native)
     * @param amount Fee amount collected
     * @param recipient Fee recipient address
     */
    event FeesCollected(
        uint256 indexed offerId,
        address indexed token,
        uint256 amount,
        address recipient
    );

    /**
     * @dev Emitted when a cross-chain message is sent
     * @param offerId Associated offer identifier
     * @param destinationChain Target chain ID
     * @param messageHash Hash of the sent message
     */
    event CrossChainMessageSent(
        uint256 indexed offerId,
        uint256 destinationChain,
        bytes32 messageHash
    );

    /**
     * @dev Emitted when a cross-chain message is received
     * @param offerId Associated offer identifier
     * @param sourceChain Source chain ID
     * @param messageHash Hash of the received message
     */
    event CrossChainMessageReceived(
        uint256 indexed offerId,
        uint256 sourceChain,
        bytes32 messageHash
    );

    // ============ SAME-CHAIN TRADING FUNCTIONS ============

    /**
     * @dev Creates a new same-chain trading offer
     * @param offer The trade offer details
     * @return offerId The unique identifier for the created offer
     */
    function createSameChainOffer(DataStructures.TradeOffer calldata offer) 
        external 
        payable 
        returns (uint256 offerId);

    /**
     * @dev Accepts a same-chain trading offer
     * @param offerId The unique identifier of the offer to accept
     */
    function acceptSameChainOffer(uint256 offerId) external payable;

    // ============ CROSS-CHAIN TRADING FUNCTIONS ============

    /**
     * @dev Creates a new cross-chain trading offer
     * @param offer The trade offer details
     * @param destinationChain The target chain for cross-chain settlement
     * @return offerId The unique identifier for the created offer
     */
    function createCrossChainOffer(
        DataStructures.TradeOffer calldata offer, 
        uint256 destinationChain
    ) external payable returns (uint256 offerId);

    /**
     * @dev Accepts a cross-chain trading offer
     * @param offerId The unique identifier of the offer to accept
     */
    function acceptCrossChainOffer(uint256 offerId) external payable;

    /**
     * @dev Initiates cross-chain trade settlement
     * @param offerId The unique identifier of the offer
     * @param destinationChain The target chain for settlement
     */
    function initiateCrossChainTrade(uint256 offerId, uint256 destinationChain) external payable;

    /**
     * @dev Completes cross-chain trade with proof
     * @param offerId The unique identifier of the offer
     * @param proof Cross-chain settlement proof
     */
    function completeCrossChainTrade(uint256 offerId, bytes calldata proof) external;

    // ============ GENERAL OFFER MANAGEMENT ============

    /**
     * @dev Cancels an existing offer
     * @param offerId The unique identifier of the offer to cancel
     */
    function cancelOffer(uint256 offerId) external;

    /**
     * @dev Creates a counter-offer for an existing offer
     * @param offerId The unique identifier of the original offer
     * @param newOffer The counter-offer details
     * @return counterOfferId The unique identifier for the counter-offer
     */
    function counterOffer(uint256 offerId, DataStructures.TradeOffer calldata newOffer) 
        external 
        payable 
        returns (uint256 counterOfferId);

    // ============ ASSET MANAGEMENT ============

    /**
     * @dev Deposits assets into escrow for an offer
     * @param offerId The unique identifier of the offer
     * @param assets Array of assets to deposit
     */
    function depositAssets(uint256 offerId, DataStructures.Asset[] calldata assets) external payable;

    /**
     * @dev Withdraws assets from escrow (for cancelled/expired offers)
     * @param offerId The unique identifier of the offer
     */
    function withdrawAssets(uint256 offerId) external;

    /**
     * @dev Emergency withdrawal of assets (admin only)
     * @param offerId The unique identifier of the offer
     * @param recipient Address to receive the assets
     */
    function emergencyWithdrawAssets(uint256 offerId, address recipient) external;

    // ============ BATCH OPERATIONS ============

    /**
     * @dev Creates multiple offers in a single transaction
     * @param offers Array of trade offers to create
     * @return offerIds Array of created offer identifiers
     */
    function createBatchOffers(DataStructures.TradeOffer[] calldata offers) 
        external 
        payable 
        returns (uint256[] memory offerIds);

    /**
     * @dev Accepts multiple offers in a single transaction
     * @param offerIds Array of offer identifiers to accept
     */
    function acceptBatchOffers(uint256[] calldata offerIds) external payable;

    /**
     * @dev Cancels multiple offers in a single transaction
     * @param offerIds Array of offer identifiers to cancel
     */
    function cancelBatchOffers(uint256[] calldata offerIds) external;

    // ============ VIEW FUNCTIONS ============

    /**
     * @dev Gets complete offer details
     * @param offerId The unique identifier of the offer
     * @return offer The complete offer structure
     */
    function getOffer(uint256 offerId) external view returns (DataStructures.TradeOffer memory offer);

    /**
     * @dev Gets the current status of an offer
     * @param offerId The unique identifier of the offer
     * @return status The current offer status
     */
    function getOfferStatus(uint256 offerId) external view returns (DataStructures.OfferStatus status);

    /**
     * @dev Gets all offers created by a specific user
     * @param user The user address
     * @return offerIds Array of offer identifiers
     */
    function getUserOffers(address user) external view returns (uint256[] memory offerIds);

    /**
     * @dev Gets all active same-chain offers
     * @return offerIds Array of same-chain offer identifiers
     */
    function getSameChainOffers() external view returns (uint256[] memory offerIds);

    /**
     * @dev Gets all active cross-chain offers for a specific chain
     * @param chainId The target chain ID
     * @return offerIds Array of cross-chain offer identifiers
     */
    function getCrossChainOffers(uint256 chainId) external view returns (uint256[] memory offerIds);

    /**
     * @dev Gets cross-chain settlement details
     * @param offerId The unique identifier of the offer
     * @return settlement The cross-chain settlement information
     */
    function getCrossChainSettlement(uint256 offerId) 
        external 
        view 
        returns (DataStructures.CrossChainSettlement memory settlement);

    /**
     * @dev Checks if an offer is valid and can be accepted
     * @param offerId The unique identifier of the offer
     * @return isValid Whether the offer is valid
     * @return reason Reason if offer is invalid
     */
    function isOfferValid(uint256 offerId) external view returns (bool isValid, string memory reason);

    /**
     * @dev Estimates gas cost for cross-chain operation
     * @param destinationChain The target chain ID
     * @param payload The message payload
     * @return gasEstimate The estimated gas cost
     */
    function estimateCrossChainGas(uint256 destinationChain, bytes calldata payload) 
        external 
        view 
        returns (uint256 gasEstimate);

    /**
     * @dev Gets the next available offer ID
     * @return nextOfferId The next offer identifier
     */
    function getNextOfferId() external view returns (uint256 nextOfferId);

    /**
     * @dev Gets total number of offers created
     * @return totalOffers The total number of offers
     */
    function getTotalOffers() external view returns (uint256 totalOffers);

    /**
     * @dev Gets platform statistics
     * @return totalTrades Total completed trades
     * @return totalVolume Total trading volume
     * @return totalFees Total fees collected
     */
    function getPlatformStats() 
        external 
        view 
        returns (uint256 totalTrades, uint256 totalVolume, uint256 totalFees);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

import "../libraries/DataStructures.sol";

/**
 * @title IFeeManager
 * @dev Interface for platform fee management
 * @author Blocklabs Studio
 */
interface IFeeManager {
    
    // ============ EVENTS ============
    
    event FeeConfigUpdated(uint256 indexed chainId, DataStructures.FeeConfig config);
    event FeeCollected(uint256 indexed offerId, address token, uint256 amount, address recipient);
    event FeeExemptionUpdated(address indexed account, bool exempt);
    
    // ============ CORE FUNCTIONS ============
    
    function calculateFee(uint256 chainId, uint256 tradeValue) external view returns (uint256 fee);
    function collectFee(uint256 offerId, uint256 tradeValue, address feeToken) external payable;
    function setFeeConfig(uint256 chainId, DataStructures.FeeConfig calldata config) external;
    function setFeeExemption(address account, bool exempt) external;
    
    // ============ VIEW FUNCTIONS ============
    
    function getFeeConfig(uint256 chainId) external view returns (DataStructures.FeeConfig memory);
    function isFeeExempt(address account) external view returns (bool);
    function getTotalFeesCollected(address token) external view returns (uint256);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

import "../libraries/DataStructures.sol";

/**
 * @title IOfferManager
 * @dev Interface for trade offer lifecycle management
 * @author Blocklabs Studio
 */
interface IOfferManager {
    
    // ============ EVENTS ============
    
    event OfferCreated(uint256 indexed offerId, address indexed creator, DataStructures.SettlementMode mode);
    event OfferAccepted(uint256 indexed offerId, address indexed acceptor);
    event OfferCancelled(uint256 indexed offerId, address indexed creator);
    event OfferExpired(uint256 indexed offerId);
    event CounterOfferCreated(uint256 indexed originalOfferId, uint256 indexed counterOfferId);
    
    // ============ CORE FUNCTIONS ============
    
    function createOffer(DataStructures.TradeOffer calldata offer) external returns (uint256 offerId);
    function acceptOffer(uint256 offerId, address acceptor) external;
    function cancelOffer(uint256 offerId, address caller) external;
    function createCounterOffer(uint256 originalOfferId, DataStructures.TradeOffer calldata counterOffer) external returns (uint256 counterOfferId);
    
    // ============ VALIDATION FUNCTIONS ============
    
    function validateOffer(DataStructures.TradeOffer calldata offer) external view returns (bool valid, string memory reason);
    function canAcceptOffer(uint256 offerId, address acceptor) external view returns (bool canAccept, string memory reason);
    function isOfferExpired(uint256 offerId) external view returns (bool expired);
    
    // ============ VIEW FUNCTIONS ============
    
    function getOffer(uint256 offerId) external view returns (DataStructures.TradeOffer memory);
    function getOffersByCreator(address creator) external view returns (uint256[] memory);
    function getActiveOffers() external view returns (uint256[] memory);
    function getTotalOffers() external view returns (uint256);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/token/ERC1155/IERC1155.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/utils/introspection/IERC165.sol";
import "../libraries/DataStructures.sol";
import "../libraries/Errors.sol";

/**
 * @title AssetLibrary
 * @dev Utility library for asset handling operations
 * @author Blocklabs Studio
 */
library AssetLibrary {
    
    // ============ CONSTANTS ============
    
    /// @dev ERC721 interface ID
    bytes4 private constant INTERFACE_ID_ERC721 = 0x80ac58cd;
    
    /// @dev ERC1155 interface ID
    bytes4 private constant INTERFACE_ID_ERC1155 = 0xd9b67a26;
    
    /// @dev ERC20 interface ID (not standard, but commonly used)
    bytes4 private constant INTERFACE_ID_ERC20 = 0x36372b07;
    
    // ============ ASSET VALIDATION FUNCTIONS ============
    
    /**
     * @dev Validates an asset structure
     * @param asset The asset to validate
     * @return valid Whether the asset is valid
     * @return reason Reason if asset is invalid
     */
    function validateAsset(DataStructures.Asset memory asset) 
        internal 
        view 
        returns (bool valid, string memory reason) 
    {
        // Check for zero address on non-native assets
        if (asset.assetType != DataStructures.AssetType.NATIVE && asset.tokenContract == address(0)) {
            return (false, "Token contract cannot be zero address for non-native assets");
        }
        
        // Check for non-zero address on native assets
        if (asset.assetType == DataStructures.AssetType.NATIVE && asset.tokenContract != address(0)) {
            return (false, "Token contract must be zero address for native assets");
        }
        
        // Validate amount based on asset type
        if (asset.assetType == DataStructures.AssetType.ERC721 && asset.amount != 1) {
            return (false, "ERC721 assets must have amount of 1");
        }
        
        if (asset.amount == 0) {
            return (false, "Asset amount cannot be zero");
        }
        
        // Validate token ID based on asset type
        if (asset.assetType == DataStructures.AssetType.ERC20 && asset.tokenId != 0) {
            return (false, "ERC20 assets must have tokenId of 0");
        }
        
        if (asset.assetType == DataStructures.AssetType.NATIVE && asset.tokenId != 0) {
            return (false, "Native assets must have tokenId of 0");
        }
        
        // Check contract existence for non-native assets
        if (asset.assetType != DataStructures.AssetType.NATIVE) {
            if (!_isContract(asset.tokenContract)) {
                return (false, "Token contract does not exist");
            }
            
            // Verify interface support
            if (!_supportsInterface(asset.tokenContract, asset.assetType)) {
                return (false, "Contract does not support expected interface");
            }
        }
        
        return (true, "");
    }
    
    /**
     * @dev Verifies asset ownership
     * @param asset The asset to verify
     * @param owner The claimed owner
     * @return owned Whether the owner owns the asset
     */
    function verifyOwnership(DataStructures.Asset memory asset, address owner) 
        internal 
        view 
        returns (bool owned) 
    {
        if (asset.assetType == DataStructures.AssetType.ERC721) {
            try IERC721(asset.tokenContract).ownerOf(asset.tokenId) returns (address tokenOwner) {
                return tokenOwner == owner;
            } catch {
                return false;
            }
        } else if (asset.assetType == DataStructures.AssetType.ERC1155) {
            try IERC1155(asset.tokenContract).balanceOf(owner, asset.tokenId) returns (uint256 balance) {
                return balance >= asset.amount;
            } catch {
                return false;
            }
        } else if (asset.assetType == DataStructures.AssetType.ERC20) {
            try IERC20(asset.tokenContract).balanceOf(owner) returns (uint256 balance) {
                return balance >= asset.amount;
            } catch {
                return false;
            }
        } else if (asset.assetType == DataStructures.AssetType.NATIVE) {
            return owner.balance >= asset.amount;
        }
        
        return false;
    }
    
    /**
     * @dev Verifies transfer approval
     * @param asset The asset to verify
     * @param owner The asset owner
     * @param spender The approved spender
     * @return approved Whether the spender is approved
     */
    function verifyApproval(DataStructures.Asset memory asset, address owner, address spender) 
        internal 
        view 
        returns (bool approved) 
    {
        if (asset.assetType == DataStructures.AssetType.ERC721) {
            try IERC721(asset.tokenContract).getApproved(asset.tokenId) returns (address approvedAddress) {
                if (approvedAddress == spender) return true;
            } catch {}
            
            try IERC721(asset.tokenContract).isApprovedForAll(owner, spender) returns (bool isApproved) {
                return isApproved;
            } catch {
                return false;
            }
        } else if (asset.assetType == DataStructures.AssetType.ERC1155) {
            try IERC1155(asset.tokenContract).isApprovedForAll(owner, spender) returns (bool isApproved) {
                return isApproved;
            } catch {
                return false;
            }
        } else if (asset.assetType == DataStructures.AssetType.ERC20) {
            try IERC20(asset.tokenContract).allowance(owner, spender) returns (uint256 allowance) {
                return allowance >= asset.amount;
            } catch {
                return false;
            }
        } else if (asset.assetType == DataStructures.AssetType.NATIVE) {
            // Native assets don't require approval
            return true;
        }
        
        return false;
    }
    
    // ============ ASSET TRANSFER FUNCTIONS ============
    
    /**
     * @dev Transfers an asset from one address to another
     * @param asset The asset to transfer
     * @param from The sender address
     * @param to The recipient address
     */
    function transferAsset(DataStructures.Asset memory asset, address from, address to) internal {
        if (asset.assetType == DataStructures.AssetType.ERC721) {
            IERC721(asset.tokenContract).safeTransferFrom(from, to, asset.tokenId);
        } else if (asset.assetType == DataStructures.AssetType.ERC1155) {
            IERC1155(asset.tokenContract).safeTransferFrom(from, to, asset.tokenId, asset.amount, "");
        } else if (asset.assetType == DataStructures.AssetType.ERC20) {
            if (from == address(this)) {
                // Transfer from contract
                if (!IERC20(asset.tokenContract).transfer(to, asset.amount)) {
                    revert CustomErrors.AssetWithdrawalFailed(asset.tokenContract, asset.tokenId, asset.amount);
                }
            } else {
                // Transfer from user
                if (!IERC20(asset.tokenContract).transferFrom(from, to, asset.amount)) {
                    revert CustomErrors.AssetDepositFailed(asset.tokenContract, asset.tokenId, asset.amount);
                }
            }
        } else if (asset.assetType == DataStructures.AssetType.NATIVE) {
            // Native token transfer - only transfer if not depositing to contract
            if (to != address(this)) {
                (bool success, ) = payable(to).call{value: asset.amount}("");
                if (!success) {
                    revert CustomErrors.AssetWithdrawalFailed(address(0), 0, asset.amount);
                }
            }
            // If transferring to contract (deposit), native tokens are already received via msg.value
        }
    }
    
    /**
     * @dev Calculates the total native token amount in an asset array
     * @param assets Array of assets to check
     * @return totalNativeAmount Total amount of native tokens
     */
    function calculateNativeTokenAmount(DataStructures.Asset[] memory assets)
        internal
        pure
        returns (uint256 totalNativeAmount)
    {
        for (uint256 i = 0; i < assets.length; i++) {
            if (assets[i].assetType == DataStructures.AssetType.NATIVE) {
                totalNativeAmount += assets[i].amount;
            }
        }
        return totalNativeAmount;
    }
    
    /**
     * @dev Transfers multiple assets in batch
     * @param assets Array of assets to transfer
     * @param from The sender address
     * @param to The recipient address
     */
    function transferAssetsBatch(
        DataStructures.Asset[] memory assets, 
        address from, 
        address to
    ) internal {
        for (uint256 i = 0; i < assets.length; i++) {
            transferAsset(assets[i], from, to);
        }
    }
    
    // ============ ASSET UTILITY FUNCTIONS ============
    
    /**
     * @dev Calculates the total value of assets (simplified - returns count for now)
     * @param assets Array of assets
     * @return totalValue The total value
     */
    function calculateAssetValue(DataStructures.Asset[] memory assets) 
        internal 
        pure 
        returns (uint256 totalValue) 
    {
        // Simplified implementation - in production, this would integrate with price oracles
        return assets.length;
    }
    
    /**
     * @dev Generates a hash for an asset
     * @param asset The asset to hash
     * @return assetHash The keccak256 hash of the asset
     */
    function hashAsset(DataStructures.Asset memory asset) internal pure returns (bytes32 assetHash) {
        return keccak256(abi.encode(
            asset.tokenContract,
            asset.tokenId,
            asset.amount,
            asset.assetType,
            asset.chainId
        ));
    }
    
    /**
     * @dev Generates a hash for multiple assets
     * @param assets Array of assets to hash
     * @return assetsHash The keccak256 hash of all assets
     */
    function hashAssets(DataStructures.Asset[] memory assets) 
        internal 
        pure 
        returns (bytes32 assetsHash) 
    {
        bytes32[] memory assetHashes = new bytes32[](assets.length);
        for (uint256 i = 0; i < assets.length; i++) {
            assetHashes[i] = hashAsset(assets[i]);
        }
        return keccak256(abi.encodePacked(assetHashes));
    }
    
    /**
     * @dev Compares two assets for equality
     * @param asset1 First asset
     * @param asset2 Second asset
     * @return equal Whether the assets are equal
     */
    function assetsEqual(DataStructures.Asset memory asset1, DataStructures.Asset memory asset2) 
        internal 
        pure 
        returns (bool equal) 
    {
        return (
            asset1.tokenContract == asset2.tokenContract &&
            asset1.tokenId == asset2.tokenId &&
            asset1.amount == asset2.amount &&
            asset1.assetType == asset2.assetType &&
            asset1.chainId == asset2.chainId
        );
    }
    
    // ============ PRIVATE HELPER FUNCTIONS ============
    
    /**
     * @dev Checks if an address is a contract
     * @param account The address to check
     * @return isContract Whether the address is a contract
     */
    function _isContract(address account) private view returns (bool isContract) {
        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }
    
    /**
     * @dev Checks if a contract supports the expected interface for an asset type
     * @param contractAddress The contract to check
     * @param assetType The expected asset type
     * @return supported Whether the interface is supported
     */
    function _supportsInterface(address contractAddress, DataStructures.AssetType assetType) 
        private 
        view 
        returns (bool supported) 
    {
        try IERC165(contractAddress).supportsInterface(_getInterfaceId(assetType)) returns (bool result) {
            return result;
        } catch {
            // If ERC165 is not supported, try direct interface checks
            return _directInterfaceCheck(contractAddress, assetType);
        }
    }
    
    /**
     * @dev Gets the interface ID for an asset type
     * @param assetType The asset type
     * @return interfaceId The interface ID
     */
    function _getInterfaceId(DataStructures.AssetType assetType) 
        private 
        pure 
        returns (bytes4 interfaceId) 
    {
        if (assetType == DataStructures.AssetType.ERC721) {
            return INTERFACE_ID_ERC721;
        } else if (assetType == DataStructures.AssetType.ERC1155) {
            return INTERFACE_ID_ERC1155;
        } else if (assetType == DataStructures.AssetType.ERC20) {
            return INTERFACE_ID_ERC20;
        }
        return bytes4(0);
    }
    
    /**
     * @dev Performs direct interface check when ERC165 is not available
     * @param contractAddress The contract to check
     * @param assetType The expected asset type
     * @return supported Whether the interface is supported
     */
    function _directInterfaceCheck(address contractAddress, DataStructures.AssetType assetType) 
        private 
        view 
        returns (bool supported) 
    {
        if (assetType == DataStructures.AssetType.ERC721) {
            try IERC721(contractAddress).balanceOf(address(this)) returns (uint256) {
                return true;
            } catch {
                return false;
            }
        } else if (assetType == DataStructures.AssetType.ERC1155) {
            try IERC1155(contractAddress).balanceOf(address(this), 0) returns (uint256) {
                return true;
            } catch {
                return false;
            }
        } else if (assetType == DataStructures.AssetType.ERC20) {
            try IERC20(contractAddress).totalSupply() returns (uint256) {
                return true;
            } catch {
                return false;
            }
        }
        return false;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

/**
 * @title Constants
 * @dev System constants for the Cross-Chain NFT Trading Platform
 * @author Blocklabs Studio
 */
library Constants {
    
    // ============ ROLE CONSTANTS ============
    
    /// @dev Admin role - Full platform control and role management
    bytes32 public constant ADMIN_ROLE = keccak256("ADMIN_ROLE");
    
    /// @dev Project admin role - NFT project management and whitelist control
    bytes32 public constant PROJECT_ADMIN_ROLE = keccak256("PROJECT_ADMIN_ROLE");
    
    /// @dev Fee manager role - Fee configuration and collection management
    bytes32 public constant FEE_MANAGER_ROLE = keccak256("FEE_MANAGER_ROLE");
    
    /// @dev Emergency role - Pause/unpause and emergency functions
    bytes32 public constant EMERGENCY_ROLE = keccak256("EMERGENCY_ROLE");
    
    /// @dev Upgrader role - Contract upgrade authorization
    bytes32 public constant UPGRADER_ROLE = keccak256("UPGRADER_ROLE");
    
    // ============ TIME CONSTANTS ============
    
    /// @dev Minimum offer duration (1 hour)
    uint256 public constant MIN_OFFER_DURATION = 1 hours;
    
    /// @dev Maximum offer duration (30 days)
    uint256 public constant MAX_OFFER_DURATION = 30 days;
    
    /// @dev Same-chain settlement timeout (1 hour)
    uint256 public constant SAME_CHAIN_TIMEOUT = 1 hours;
    
    /// @dev Default cross-chain settlement timeout (24 hours)
    uint256 public constant CROSS_CHAIN_TIMEOUT = 24 hours;
    
    /// @dev Maximum cross-chain settlement timeout (72 hours)
    uint256 public constant MAX_CROSS_CHAIN_TIMEOUT = 72 hours;
    
    /// @dev Minimum cross-chain settlement timeout (1 hour)
    uint256 public constant MIN_CROSS_CHAIN_TIMEOUT = 1 hours;
    
    // ============ UPGRADE TIMELOCK CONSTANTS ============
    
    /// @dev Major upgrade timelock delay (48 hours)
    uint256 public constant MAJOR_UPGRADE_DELAY = 48 hours;
    
    /// @dev Minor upgrade timelock delay (24 hours)
    uint256 public constant MINOR_UPGRADE_DELAY = 24 hours;
    
    /// @dev Emergency upgrade delay (6 hours)
    uint256 public constant EMERGENCY_UPGRADE_DELAY = 6 hours;
    
    /// @dev Parameter change delay (12 hours)
    uint256 public constant PARAMETER_CHANGE_DELAY = 12 hours;
    
    // ============ FEE CONSTANTS ============
    
    /// @dev Maximum platform fee (10% in basis points)
    uint256 public constant MAX_PLATFORM_FEE = 1000;
    
    /// @dev Default platform fee (2.5% in basis points)
    uint256 public constant DEFAULT_PLATFORM_FEE = 250;
    
    /// @dev Basis points denominator (100% = 10000)
    uint256 public constant BASIS_POINTS = 10000;
    
    /// @dev Maximum royalty percentage (10% in basis points)
    uint256 public constant MAX_ROYALTY_PERCENT = 1000;
    
    // ============ NETWORK-SPECIFIC MINIMUM FEES ============
    
    /// @dev Ethereum minimum fee (0.001 ETH)
    uint256 public constant ETHEREUM_MIN_FEE = 0.001 ether;
    
    /// @dev Polygon minimum fee (1 MATIC)
    uint256 public constant POLYGON_MIN_FEE = 1 ether;
    
    /// @dev Arbitrum minimum fee (0.001 ETH)
    uint256 public constant ARBITRUM_MIN_FEE = 0.001 ether;
    
    /// @dev Optimism minimum fee (0.001 ETH)
    uint256 public constant OPTIMISM_MIN_FEE = 0.001 ether;
    
    /// @dev Base minimum fee (0.001 ETH)
    uint256 public constant BASE_MIN_FEE = 0.001 ether;
    
    /// @dev ApeChain minimum fee (1 APE)
    uint256 public constant APECHAIN_MIN_FEE = 1 ether;
    
    // ============ GAS CONSTANTS ============
    
    /// @dev Maximum gas limit for cross-chain operations
    uint256 public constant MAX_GAS_LIMIT = 500000;
    
    /// @dev Default gas limit for cross-chain operations
    uint256 public constant DEFAULT_GAS_LIMIT = 200000;
    
    /// @dev Minimum gas limit for cross-chain operations
    uint256 public constant MIN_GAS_LIMIT = 50000;
    
    /// @dev Gas buffer for cross-chain operations (20%)
    uint256 public constant GAS_BUFFER_PERCENT = 2000; // 20% in basis points
    
    // ============ ARRAY AND BATCH LIMITS ============
    
    /// @dev Maximum assets per offer
    uint256 public constant MAX_ASSETS_PER_OFFER = 10;
    
    /// @dev Maximum batch size for operations
    uint256 public constant MAX_BATCH_SIZE = 50;
    
    /// @dev Maximum offers per user query
    uint256 public constant MAX_USER_OFFERS_QUERY = 100;
    
    // ============ SIGNATURE CONSTANTS ============
    
    /// @dev EIP-712 domain name
    string public constant EIP712_DOMAIN_NAME = "CrossChainNFTTrading";
    
    /// @dev EIP-712 domain version
    string public constant EIP712_DOMAIN_VERSION = "1.0";
    
    /// @dev Maximum signature validity period (1 hour)
    uint256 public constant MAX_SIGNATURE_VALIDITY = 1 hours;
    
    // ============ CHAIN ID CONSTANTS ============
    
    /// @dev Ethereum mainnet chain ID
    uint256 public constant ETHEREUM_CHAIN_ID = 1;
    
    /// @dev Arbitrum mainnet chain ID
    uint256 public constant ARBITRUM_CHAIN_ID = 42161;
    
    /// @dev Polygon mainnet chain ID
    uint256 public constant POLYGON_CHAIN_ID = 137;
    
    /// @dev Optimism mainnet chain ID
    uint256 public constant OPTIMISM_CHAIN_ID = 10;
    
    /// @dev Base mainnet chain ID
    uint256 public constant BASE_CHAIN_ID = 8453;
    
    // ============ LAYERZERO CONSTANTS ============
    
    /// @dev LayerZero message gas limit buffer
    uint256 public constant LZ_GAS_BUFFER = 50000;
    
    /// @dev Maximum LayerZero message payload size
    uint256 public constant MAX_LZ_PAYLOAD_SIZE = 10000;
    
    /// @dev LayerZero message retry limit
    uint256 public constant LZ_RETRY_LIMIT = 3;
    
    // ============ SECURITY CONSTANTS ============
    
    /// @dev Maximum failed attempts before temporary ban
    uint256 public constant MAX_FAILED_ATTEMPTS = 5;
    
    /// @dev Temporary ban duration (1 hour)
    uint256 public constant TEMP_BAN_DURATION = 1 hours;
    
    /// @dev Maximum concurrent offers per user
    uint256 public constant MAX_CONCURRENT_OFFERS = 20;
    
    // ============ UPGRADE GOVERNANCE CONSTANTS ============
    
    /// @dev Required signatures for upgrades (3 out of 5)
    uint256 public constant REQUIRED_SIGNATURES = 3;
    
    /// @dev Total number of upgrade signers
    uint256 public constant TOTAL_SIGNERS = 5;
    
    /// @dev Proposal validity period (7 days)
    uint256 public constant PROPOSAL_VALIDITY_PERIOD = 7 days;
    
    // ============ ASSET VALIDATION CONSTANTS ============
    
    /// @dev Maximum token ID for validation (prevents overflow)
    uint256 public constant MAX_TOKEN_ID = type(uint128).max;
    
    /// @dev Maximum amount for ERC20/1155 transfers
    uint256 public constant MAX_ASSET_AMOUNT = type(uint128).max;
    
    /// @dev Zero address constant
    address public constant ZERO_ADDRESS = address(0);
    
    // ============ ERROR MESSAGES ============
    
    /// @dev Common error messages as constants to save gas
    string public constant ERROR_UNAUTHORIZED = "Unauthorized access";
    string public constant ERROR_INVALID_OFFER = "Invalid offer parameters";
    string public constant ERROR_EXPIRED_OFFER = "Offer has expired";
    string public constant ERROR_INSUFFICIENT_BALANCE = "Insufficient balance";
    string public constant ERROR_TRANSFER_FAILED = "Asset transfer failed";
    string public constant ERROR_INVALID_SIGNATURE = "Invalid signature";
    string public constant ERROR_ALREADY_EXECUTED = "Already executed";
    string public constant ERROR_PAUSED = "Contract is paused";
    string public constant ERROR_BLACKLISTED = "Address is blacklisted";
    string public constant ERROR_INVALID_CHAIN = "Invalid chain ID";
    string public constant ERROR_GAS_LIMIT_EXCEEDED = "Gas limit exceeded";
    
    // ============ EVENT SIGNATURE HASHES ============
    
    /// @dev Pre-computed event signature hashes for gas optimization
    bytes32 public constant OFFER_CREATED_HASH = keccak256("OfferCreated(uint256,address,address,uint256)");
    bytes32 public constant OFFER_ACCEPTED_HASH = keccak256("OfferAccepted(uint256,address,uint256)");
    bytes32 public constant OFFER_CANCELLED_HASH = keccak256("OfferCancelled(uint256,address,uint256)");
    bytes32 public constant ASSETS_SWAPPED_HASH = keccak256("AssetsSwapped(uint256,address,address,uint256)");
    bytes32 public constant CROSS_CHAIN_MESSAGE_SENT_HASH = keccak256("CrossChainMessageSent(uint256,uint256,bytes32)");
    bytes32 public constant CROSS_CHAIN_MESSAGE_RECEIVED_HASH = keccak256("CrossChainMessageReceived(uint256,uint256,bytes32)");
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

import "../libraries/DataStructures.sol";
import "../libraries/Constants.sol";
import "../libraries/Errors.sol";

/**
 * @title CrossChainLibrary
 * @dev Utility library for cross-chain operations
 * @author Blocklabs Studio
 */
library CrossChainLibrary {
    
    // ============ CONSTANTS ============
    
    /// @dev Salt for hashlock generation
    bytes32 private constant HASHLOCK_SALT = keccak256("CROSSCHAIN_HASHLOCK_SALT");
    
    // ============ HASHLOCK/TIMELOCK FUNCTIONS ============
    
    /**
     * @dev Generates a hashlock for cross-chain atomic swaps
     * @param offerId The offer identifier
     * @param secret The secret value
     * @param sourceChain The source chain ID
     * @param destinationChain The destination chain ID
     * @return hashlock The generated hashlock
     */
    function generateHashlock(
        uint256 offerId,
        bytes32 secret,
        uint256 sourceChain,
        uint256 destinationChain
    ) internal pure returns (bytes32 hashlock) {
        return keccak256(abi.encodePacked(
            HASHLOCK_SALT,
            offerId,
            secret,
            sourceChain,
            destinationChain
        ));
    }
    
    /**
     * @dev Verifies a hashlock against a secret
     * @param hashlock The hashlock to verify
     * @param secret The secret value
     * @param offerId The offer identifier
     * @param sourceChain The source chain ID
     * @param destinationChain The destination chain ID
     * @return isValid Whether the hashlock is valid
     */
    function verifyHashlock(
        bytes32 hashlock,
        bytes32 secret,
        uint256 offerId,
        uint256 sourceChain,
        uint256 destinationChain
    ) internal pure returns (bool isValid) {
        bytes32 expectedHashlock = generateHashlock(
            offerId,
            secret,
            sourceChain,
            destinationChain
        );
        return hashlock == expectedHashlock;
    }
    
    /**
     * @dev Calculates timelock deadline for cross-chain settlement
     * @param settlementMode The settlement mode
     * @param customTimeout Custom timeout (0 for default)
     * @return timelock The timelock deadline timestamp
     */
    function calculateTimelock(
        DataStructures.SettlementMode settlementMode,
        uint256 customTimeout
    ) internal view returns (uint256 timelock) {
        uint256 timeout;
        
        if (customTimeout > 0) {
            // Use custom timeout if provided
            if (customTimeout < Constants.MIN_CROSS_CHAIN_TIMEOUT) {
                timeout = Constants.MIN_CROSS_CHAIN_TIMEOUT;
            } else if (customTimeout > Constants.MAX_CROSS_CHAIN_TIMEOUT) {
                timeout = Constants.MAX_CROSS_CHAIN_TIMEOUT;
            } else {
                timeout = customTimeout;
            }
        } else {
            // Use default timeouts
            if (settlementMode == DataStructures.SettlementMode.SAME_CHAIN) {
                timeout = Constants.SAME_CHAIN_TIMEOUT;
            } else {
                timeout = Constants.CROSS_CHAIN_TIMEOUT;
            }
        }
        
        return block.timestamp + timeout;
    }
    
    /**
     * @dev Checks if a timelock has expired
     * @param timelock The timelock timestamp
     * @return expired Whether the timelock has expired
     */
    function isTimelockExpired(uint256 timelock) internal view returns (bool expired) {
        return block.timestamp > timelock;
    }
    
    // ============ MESSAGE ENCODING/DECODING FUNCTIONS ============
    
    /**
     * @dev Encodes a cross-chain message
     * @param messageType The type of message
     * @param offerId The offer identifier
     * @param sender The message sender
     * @param data Additional message data
     * @return payload The encoded message payload
     */
    function encodeMessage(
        DataStructures.MessageType messageType,
        uint256 offerId,
        address sender,
        bytes memory data
    ) internal view returns (bytes memory payload) {
        DataStructures.CrossChainMessage memory message = DataStructures.CrossChainMessage({
            messageType: messageType,
            offerId: offerId,
            sender: sender,
            data: data,
            timestamp: block.timestamp
        });
        
        return abi.encode(message);
    }
    
    /**
     * @dev Decodes a cross-chain message
     * @param payload The encoded message payload
     * @return message The decoded cross-chain message
     */
    function decodeMessage(bytes memory payload) 
        internal 
        pure 
        returns (DataStructures.CrossChainMessage memory message) 
    {
        return abi.decode(payload, (DataStructures.CrossChainMessage));
    }
    
    /**
     * @dev Validates a cross-chain message
     * @param message The message to validate
     * @param maxAge Maximum message age in seconds
     * @return isValid Whether the message is valid
     * @return reason Reason if message is invalid
     */
    function validateMessage(
        DataStructures.CrossChainMessage memory message,
        uint256 maxAge
    ) internal view returns (bool isValid, string memory reason) {
        // Check message age
        if (block.timestamp > message.timestamp + maxAge) {
            return (false, "Message too old");
        }
        
        // Check sender is not zero address
        if (message.sender == address(0)) {
            return (false, "Invalid sender address");
        }
        
        // Check offer ID is not zero
        if (message.offerId == 0) {
            return (false, "Invalid offer ID");
        }
        
        return (true, "");
    }
    
    // ============ GAS ESTIMATION FUNCTIONS ============
    
    /**
     * @dev Estimates gas needed for cross-chain message execution
     * @param messageType The type of message
     * @param dataSize Size of additional data in bytes
     * @return gasEstimate The estimated gas requirement
     */
    function estimateExecutionGas(
        DataStructures.MessageType messageType,
        uint256 dataSize
    ) internal pure returns (uint256 gasEstimate) {
        uint256 baseGas = Constants.DEFAULT_GAS_LIMIT;
        
        // Adjust gas based on message type
        if (messageType == DataStructures.MessageType.OFFER_CREATED) {
            baseGas += 50000; // Additional gas for offer processing
        } else if (messageType == DataStructures.MessageType.OFFER_ACCEPTED) {
            baseGas += 100000; // Additional gas for acceptance processing
        } else if (messageType == DataStructures.MessageType.ASSETS_LOCKED) {
            baseGas += 75000; // Additional gas for asset locking
        } else if (messageType == DataStructures.MessageType.SETTLEMENT_READY) {
            baseGas += 150000; // Additional gas for settlement
        } else if (messageType == DataStructures.MessageType.SETTLEMENT_COMPLETE) {
            baseGas += 100000; // Additional gas for completion
        } else if (messageType == DataStructures.MessageType.SETTLEMENT_FAILED) {
            baseGas += 125000; // Additional gas for rollback
        }
        
        // Add gas for data processing (approximate)
        baseGas += dataSize * 100; // 100 gas per byte of data
        
        // Add buffer for safety
        return baseGas + (baseGas * Constants.GAS_BUFFER_PERCENT / Constants.BASIS_POINTS);
    }
    
    /**
     * @dev Calculates gas price with buffer for cross-chain operations
     * @param baseGasPrice The base gas price
     * @return adjustedGasPrice The adjusted gas price with buffer
     */
    function calculateGasPriceWithBuffer(uint256 baseGasPrice) 
        internal 
        pure 
        returns (uint256 adjustedGasPrice) 
    {
        return baseGasPrice + (baseGasPrice * Constants.GAS_BUFFER_PERCENT / Constants.BASIS_POINTS);
    }
    
    // ============ CHAIN VALIDATION FUNCTIONS ============
    
    /**
     * @dev Validates if a chain ID is supported
     * @param chainId The chain ID to validate
     * @return isSupported Whether the chain is supported
     */
    function isSupportedChain(uint256 chainId) internal view returns (bool isSupported) {
        return (
            chainId == Constants.ETHEREUM_CHAIN_ID ||
            chainId == Constants.ARBITRUM_CHAIN_ID ||
            chainId == Constants.POLYGON_CHAIN_ID ||
            chainId == Constants.OPTIMISM_CHAIN_ID ||
            chainId == Constants.BASE_CHAIN_ID ||
            chainId == block.chainid // Current chain is always supported
        );
    }
    
    /**
     * @dev Gets the native token symbol for a chain
     * @param chainId The chain ID
     * @return symbol The native token symbol
     */
    function getNativeTokenSymbol(uint256 chainId) internal pure returns (string memory symbol) {
        if (chainId == Constants.ETHEREUM_CHAIN_ID) {
            return "ETH";
        } else if (chainId == Constants.ARBITRUM_CHAIN_ID) {
            return "ETH";
        } else if (chainId == Constants.POLYGON_CHAIN_ID) {
            return "MATIC";
        } else if (chainId == Constants.OPTIMISM_CHAIN_ID) {
            return "ETH";
        } else if (chainId == Constants.BASE_CHAIN_ID) {
            return "ETH";
        } else {
            return "UNKNOWN";
        }
    }
    
    /**
     * @dev Gets the minimum fee for a chain
     * @param chainId The chain ID
     * @return minFee The minimum fee in native token
     */
    function getMinimumFee(uint256 chainId) internal pure returns (uint256 minFee) {
        if (chainId == Constants.ETHEREUM_CHAIN_ID) {
            return Constants.ETHEREUM_MIN_FEE;
        } else if (chainId == Constants.ARBITRUM_CHAIN_ID) {
            return Constants.ARBITRUM_MIN_FEE;
        } else if (chainId == Constants.POLYGON_CHAIN_ID) {
            return Constants.POLYGON_MIN_FEE;
        } else if (chainId == Constants.OPTIMISM_CHAIN_ID) {
            return Constants.OPTIMISM_MIN_FEE;
        } else if (chainId == Constants.BASE_CHAIN_ID) {
            return Constants.BASE_MIN_FEE;
        } else {
            return 0.001 ether; // Default minimum fee
        }
    }
    
    // ============ SETTLEMENT STATE FUNCTIONS ============
    
    /**
     * @dev Validates settlement state transition
     * @param currentState The current settlement state
     * @param newState The new settlement state
     * @return isValid Whether the transition is valid
     */
    function isValidStateTransition(
        DataStructures.SettlementState currentState,
        DataStructures.SettlementState newState
    ) internal pure returns (bool isValid) {
        if (currentState == DataStructures.SettlementState.PENDING) {
            return (newState == DataStructures.SettlementState.CONFIRMED ||
                    newState == DataStructures.SettlementState.FAILED);
        } else if (currentState == DataStructures.SettlementState.CONFIRMED) {
            return false; // Cannot transition from confirmed
        } else if (currentState == DataStructures.SettlementState.FAILED) {
            return (newState == DataStructures.SettlementState.ROLLED_BACK);
        } else if (currentState == DataStructures.SettlementState.ROLLED_BACK) {
            return false; // Cannot transition from rolled back
        }
        
        return false;
    }
    
    /**
     * @dev Checks if a settlement state is final
     * @param state The settlement state
     * @return isFinal Whether the state is final
     */
    function isSettlementStateFinal(DataStructures.SettlementState state) 
        internal 
        pure 
        returns (bool isFinal) 
    {
        return (state == DataStructures.SettlementState.CONFIRMED ||
                state == DataStructures.SettlementState.ROLLED_BACK);
    }
    
    // ============ UTILITY FUNCTIONS ============
    
    /**
     * @dev Generates a unique message hash
     * @param message The cross-chain message
     * @param nonce Additional nonce for uniqueness
     * @return messageHash The unique message hash
     */
    function generateMessageHash(
        DataStructures.CrossChainMessage memory message,
        uint256 nonce
    ) internal pure returns (bytes32 messageHash) {
        return keccak256(abi.encode(message, nonce));
    }
    
    /**
     * @dev Calculates retry delay based on attempt number
     * @param attemptNumber The retry attempt number (1-based)
     * @return delay The delay in seconds before retry
     */
    function calculateRetryDelay(uint256 attemptNumber) internal pure returns (uint256 delay) {
        // Exponential backoff: 2^attempt * 60 seconds, capped at 1 hour
        uint256 exponentialDelay = (2 ** attemptNumber) * 60;
        return exponentialDelay > 3600 ? 3600 : exponentialDelay;
    }
    
    /**
     * @dev Validates cross-chain settlement parameters
     * @param settlement The settlement to validate
     * @return isValid Whether the settlement is valid
     * @return reason Reason if settlement is invalid
     */
    function validateSettlement(DataStructures.CrossChainSettlement memory settlement) 
        internal 
        view 
        returns (bool isValid, string memory reason) 
    {
        // Check offer ID
        if (settlement.offerId == 0) {
            return (false, "Invalid offer ID");
        }
        
        // Check chain IDs
        if (!isSupportedChain(settlement.sourceChain) || !isSupportedChain(settlement.destinationChain)) {
            return (false, "Unsupported chain");
        }
        
        // Check timelock
        if (settlement.timelock <= block.timestamp) {
            return (false, "Timelock already expired");
        }
        
        // Check gas limit
        if (settlement.gasLimit < Constants.MIN_GAS_LIMIT || settlement.gasLimit > Constants.MAX_GAS_LIMIT) {
            return (false, "Invalid gas limit");
        }
        
        return (true, "");
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

/**
 * @title DataStructures
 * @dev Core data structures for the Cross-Chain NFT Trading Platform
 * @author Blocklabs Studio
 */
library DataStructures {
    
    /**
     * @dev Asset type enumeration
     */
    enum AssetType {
        ERC721,     // Standard NFTs
        ERC1155,    // Multi-token NFTs
        ERC20,      // Fungible tokens
        NATIVE      // ETH, MATIC, APE, etc.
    }

    /**
     * @dev Asset structure representing any tradeable asset
     */
    struct Asset {
        address tokenContract;      // Contract address (0x0 for native)
        uint256 tokenId;           // For NFTs, 0 for ERC20
        uint256 amount;            // For ERC20/1155, 1 for ERC721
        AssetType assetType;       // Asset type enum
        uint256 chainId;           // Chain where asset exists
    }

    /**
     * @dev Offer status enumeration
     */
    enum OfferStatus {
        PENDING,        // Offer created, waiting for acceptance
        ACCEPTED,       // Offer accepted, assets locked
        CANCELLED,      // Offer cancelled by creator
        EXPIRED,        // Offer expired due to timeout
        COMPLETED       // Trade completed successfully
    }

    /**
     * @dev Settlement mode enumeration
     */
    enum SettlementMode {
        SAME_CHAIN,     // Direct atomic swap within same chain
        CROSS_CHAIN     // Cross-chain settlement via LayerZero
    }

    /**
     * @dev Cross-chain settlement state enumeration
     */
    enum SettlementState {
        PENDING,        // Settlement initiated
        CONFIRMED,      // Settlement confirmed on both chains
        FAILED,         // Settlement failed
        ROLLED_BACK     // Settlement rolled back due to failure
    }

    /**
     * @dev Trade offer structure
     */
    struct TradeOffer {
        uint256 offerId;                // Unique offer identifier
        address creator;                // Offer creator address
        address counterparty;           // Specific counterparty (0x0 for open offers)
        Asset[] offeredAssets;          // Assets being offered
        Asset[] requestedAssets;        // Assets being requested
        uint256 expirationTime;         // Offer expiration timestamp
        uint256 sourceChainId;          // Chain where offer is created
        uint256 destinationChainId;     // Target chain (0 for same-chain)
        SettlementMode settlementMode;  // Settlement type
        bytes signature;                // EIP-712 signature for gasless trading
        OfferStatus status;             // Current offer status
        uint256 createdAt;              // Creation timestamp
        uint256 nonce;                  // Replay protection nonce
    }

    /**
     * @dev Cross-chain settlement information
     */
    struct CrossChainSettlement {
        uint256 offerId;                // Associated offer ID
        bytes32 hashlock;               // Hash for atomic settlement
        uint256 timelock;               // Settlement deadline timestamp
        uint256 sourceChain;            // Source chain ID
        uint256 destinationChain;       // Destination chain ID
        SettlementState state;          // Current settlement state
        bytes32 messageHash;            // LayerZero message hash
        uint256 gasLimit;               // Gas limit for cross-chain execution
        address refundAddress;          // Gas refund recipient
    }

    /**
     * @dev Fee configuration structure
     */
    struct FeeConfig {
        uint256 platformFeePercent;    // Platform fee in basis points
        uint256 minimumFee;            // Minimum fee in native token
        address feeRecipient;          // Fee collection address
        bool feeEnabled;               // Fee collection toggle
        address preferredFeeToken;     // Preferred fee token for network
    }

    /**
     * @dev Project configuration for ERC721C integration
     */
    struct ProjectConfig {
        bool enforceWhitelist;         // Enforce whitelist for trading
        bool enforceBlacklist;         // Enforce blacklist restrictions
        bool useGlobalBlacklist;       // Use global blacklist
        uint256 royaltyPercent;        // Creator royalty percentage
        address royaltyRecipient;      // Royalty recipient address
    }

    /**
     * @dev LayerZero message structure
     */
    struct LZMessage {
        uint256 destinationChain;      // Target chain ID
        bytes payload;                 // Message payload
        uint256 gasLimit;              // Execution gas limit
        address refundAddress;         // Gas refund recipient
    }

    /**
     * @dev Cross-chain message types
     */
    enum MessageType {
        OFFER_CREATED,          // New cross-chain offer created
        OFFER_ACCEPTED,         // Cross-chain offer accepted
        ASSETS_LOCKED,          // Assets locked in escrow
        SETTLEMENT_READY,       // Ready for settlement
        SETTLEMENT_COMPLETE,    // Settlement completed
        SETTLEMENT_FAILED       // Settlement failed, rollback needed
    }

    /**
     * @dev Cross-chain message payload
     */
    struct CrossChainMessage {
        MessageType messageType;       // Type of cross-chain message
        uint256 offerId;              // Associated offer ID
        address sender;               // Message sender
        bytes data;                   // Additional message data
        uint256 timestamp;            // Message timestamp
    }

    /**
     * @dev Upgrade proposal structure
     */
    struct UpgradeProposal {
        uint256 proposalId;           // Unique proposal ID
        address newImplementation;    // New contract implementation
        UpgradeType upgradeType;      // Type of upgrade
        string description;           // Upgrade description
        uint256 proposedAt;           // Proposal timestamp
        uint256 executionTime;        // Earliest execution time
        bool executed;                // Execution status
        bool cancelled;               // Cancellation status
        address[] signers;            // Required signers
        mapping(address => bool) signatures; // Collected signatures
    }

    /**
     * @dev Upgrade type enumeration
     */
    enum UpgradeType {
        MINOR_UPDATE,       // Bug fixes, gas optimization
        MAJOR_UPDATE,       // New features, structural changes
        EMERGENCY_FIX,      // Critical security patches
        PARAMETER_CHANGE    // Fee adjustments, configuration changes
    }

    /**
     * @dev EIP-712 domain separator structure
     */
    struct EIP712Domain {
        string name;                   // Contract name
        string version;                // Contract version
        uint256 chainId;              // Network chain ID
        address verifyingContract;     // Contract address
    }

    /**
     * @dev Offer signature structure for EIP-712
     */
    struct OfferSignature {
        address creator;               // Offer creator
        uint256 nonce;                // Replay protection nonce
        uint256 deadline;             // Signature expiration
        bytes32 offerHash;            // Hash of offer data
    }

    /**
     * @dev Asset validation result
     */
    struct AssetValidation {
        bool isValid;                 // Overall validation result
        bool contractExists;          // Contract existence check
        bool standardCompliant;       // ERC standard compliance
        bool ownershipVerified;       // Ownership verification
        bool transferAllowed;         // Transfer permission check
        bool notBlacklisted;          // Blacklist check result
        string errorMessage;          // Error description if invalid
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

/**
 * @title Errors
 * @dev Custom error definitions for the Cross-Chain NFT Trading Platform
 * @author Blocklabs Studio
 */
library CustomErrors {
    
    // ============ ACCESS CONTROL ERRORS ============
    
    /// @dev Thrown when caller lacks required role
    error UnauthorizedAccess(address caller, bytes32 requiredRole);
    
    /// @dev Thrown when trying to grant role to zero address
    error InvalidRoleRecipient(address recipient);
    
    /// @dev Thrown when role operation fails
    error RoleOperationFailed(bytes32 role, address account);
    
    // ============ OFFER MANAGEMENT ERRORS ============
    
    /// @dev Thrown when offer ID doesn't exist
    error OfferNotFound(uint256 offerId);
    
    /// @dev Thrown when offer has expired
    error OfferExpired(uint256 offerId, uint256 expirationTime);
    
    /// @dev Thrown when offer is not in expected status
    error InvalidOfferStatus(uint256 offerId, uint8 currentStatus, uint8 expectedStatus);
    
    /// @dev Thrown when offer creator tries to accept their own offer
    error CannotAcceptOwnOffer(uint256 offerId, address creator);
    
    /// @dev Thrown when non-counterparty tries to accept private offer
    error UnauthorizedOfferAcceptance(uint256 offerId, address caller, address expectedCounterparty);
    
    /// @dev Thrown when offer has invalid parameters
    error InvalidOfferParameters(string reason);
    
    /// @dev Thrown when offer duration is invalid
    error InvalidOfferDuration(uint256 duration, uint256 minDuration, uint256 maxDuration);
    
    /// @dev Thrown when too many assets in offer
    error TooManyAssets(uint256 assetCount, uint256 maxAssets);
    
    /// @dev Thrown when offer has no assets
    error EmptyAssetArray();
    
    // ============ ASSET VALIDATION ERRORS ============
    
    /// @dev Thrown when asset contract doesn't exist
    error AssetContractNotFound(address tokenContract);
    
    /// @dev Thrown when asset doesn't comply with expected standard
    error AssetStandardMismatch(address tokenContract, uint8 expectedStandard);
    
    /// @dev Thrown when caller doesn't own the asset
    error AssetOwnershipMismatch(address tokenContract, uint256 tokenId, address owner, address caller);
    
    /// @dev Thrown when asset transfer is not approved
    error AssetTransferNotApproved(address tokenContract, uint256 tokenId, address owner, address spender);
    
    /// @dev Thrown when asset is blacklisted
    error AssetBlacklisted(address tokenContract, uint256 tokenId);
    
    /// @dev Thrown when asset amount is invalid
    error InvalidAssetAmount(uint256 amount, uint256 minAmount, uint256 maxAmount);
    
    /// @dev Thrown when asset type is invalid
    error InvalidAssetType(uint8 assetType);
    
    /// @dev Thrown when native asset amount doesn't match msg.value
    error NativeAssetAmountMismatch(uint256 expected, uint256 actual);
    
    // ============ CROSS-CHAIN ERRORS ============
    
    /// @dev Thrown when chain ID is not supported
    error UnsupportedChainId(uint256 chainId);
    
    /// @dev Thrown when cross-chain message fails
    error CrossChainMessageFailed(uint256 destinationChain, bytes32 messageHash);
    
    /// @dev Thrown when LayerZero endpoint is not set
    error LayerZeroEndpointNotSet(uint256 chainId);
    
    /// @dev Thrown when cross-chain settlement times out
    error CrossChainSettlementTimeout(uint256 offerId, uint256 timelock);
    
    /// @dev Thrown when hashlock doesn't match
    error HashlockMismatch(bytes32 expected, bytes32 actual);
    
    /// @dev Thrown when cross-chain settlement is in wrong state
    error InvalidSettlementState(uint256 offerId, uint8 currentState, uint8 expectedState);
    
    /// @dev Thrown when gas limit is insufficient
    error InsufficientGasLimit(uint256 provided, uint256 required);
    
    /// @dev Thrown when cross-chain fee is insufficient
    error InsufficientCrossChainFee(uint256 provided, uint256 required);
    
    // ============ FEE MANAGEMENT ERRORS ============
    
    /// @dev Thrown when fee percentage exceeds maximum
    error FeePercentageTooHigh(uint256 feePercent, uint256 maxFeePercent);
    
    /// @dev Thrown when fee recipient is zero address
    error InvalidFeeRecipient(address recipient);
    
    /// @dev Thrown when fee payment fails
    error FeePaymentFailed(address recipient, uint256 amount);
    
    /// @dev Thrown when insufficient fee provided
    error InsufficientFee(uint256 provided, uint256 required);
    
    /// @dev Thrown when fee token is not supported
    error UnsupportedFeeToken(address token);
    
    // ============ SIGNATURE VALIDATION ERRORS ============
    
    /// @dev Thrown when signature is invalid
    error InvalidSignature(address signer, bytes32 hash);
    
    /// @dev Thrown when signature has expired
    error SignatureExpired(uint256 deadline, uint256 currentTime);
    
    /// @dev Thrown when nonce has already been used
    error NonceAlreadyUsed(address signer, uint256 nonce);
    
    /// @dev Thrown when signature format is invalid
    error InvalidSignatureFormat();
    
    /// @dev Thrown when domain separator is invalid
    error InvalidDomainSeparator();
    
    // ============ ESCROW ERRORS ============
    
    /// @dev Thrown when asset deposit fails
    error AssetDepositFailed(address tokenContract, uint256 tokenId, uint256 amount);
    
    /// @dev Thrown when asset withdrawal fails
    error AssetWithdrawalFailed(address tokenContract, uint256 tokenId, uint256 amount);
    
    /// @dev Thrown when escrow balance is insufficient
    error InsufficientEscrowBalance(address tokenContract, uint256 tokenId, uint256 required, uint256 available);
    
    /// @dev Thrown when settlement fails
    error SettlementFailed(uint256 offerId, string reason);
    
    /// @dev Thrown when atomic swap fails
    error AtomicSwapFailed(uint256 offerId, string reason);
    
    // ============ UPGRADE ERRORS ============
    
    /// @dev Thrown when upgrade proposal doesn't exist
    error UpgradeProposalNotFound(uint256 proposalId);
    
    /// @dev Thrown when upgrade proposal has expired
    error UpgradeProposalExpired(uint256 proposalId, uint256 expirationTime);
    
    /// @dev Thrown when upgrade proposal is not ready for execution
    error UpgradeProposalNotReady(uint256 proposalId, uint256 executionTime);
    
    /// @dev Thrown when insufficient signatures for upgrade
    error InsufficientUpgradeSignatures(uint256 proposalId, uint256 signatures, uint256 required);
    
    /// @dev Thrown when upgrade implementation is invalid
    error InvalidUpgradeImplementation(address implementation);
    
    /// @dev Thrown when upgrade has already been executed
    error UpgradeAlreadyExecuted(uint256 proposalId);
    
    /// @dev Thrown when upgrade rollback fails
    error UpgradeRollbackFailed(uint256 proposalId, string reason);
    
    // ============ SECURITY ERRORS ============
    
    /// @dev Thrown when contract is paused
    error ContractPaused();
    
    /// @dev Thrown when address is blacklisted
    error AddressBlacklisted(address account);
    
    /// @dev Thrown when operation exceeds rate limit
    error RateLimitExceeded(address account, uint256 attempts, uint256 limit);
    
    /// @dev Thrown when reentrancy is detected
    error ReentrancyDetected();
    
    /// @dev Thrown when emergency stop is active
    error EmergencyStopActive();
    
    /// @dev Thrown when operation is not allowed during emergency
    error OperationNotAllowedDuringEmergency();
    
    // ============ GENERAL ERRORS ============
    
    /// @dev Thrown when zero address is provided where not allowed
    error ZeroAddressNotAllowed();
    
    /// @dev Thrown when array lengths don't match
    error ArrayLengthMismatch(uint256 length1, uint256 length2);
    
    /// @dev Thrown when array is empty when it shouldn't be
    error EmptyArray();
    
    /// @dev Thrown when array index is out of bounds
    error IndexOutOfBounds(uint256 index, uint256 length);
    
    /// @dev Thrown when value is out of valid range
    error ValueOutOfRange(uint256 value, uint256 min, uint256 max);
    
    /// @dev Thrown when operation times out
    error OperationTimeout(uint256 deadline, uint256 currentTime);
    
    /// @dev Thrown when duplicate entry is detected
    error DuplicateEntry(bytes32 key);
    
    /// @dev Thrown when required condition is not met
    error ConditionNotMet(string condition);
    
    /// @dev Thrown when external call fails
    error ExternalCallFailed(address target, bytes data);
    
    /// @dev Thrown when initialization fails
    error InitializationFailed(string reason);
    
    /// @dev Thrown when contract is already initialized
    error AlreadyInitialized();
    
    /// @dev Thrown when function is not implemented
    error NotImplemented();
    
    /// @dev Thrown when operation is not supported
    error OperationNotSupported(string operation);
    
    // ============ PROXY ERRORS ============
    
    /// @dev Thrown when implementation is not found
    error ImplementationNotFound(string name);
    
    /// @dev Thrown when proxy already exists
    error ProxyAlreadyExists(string name);
    
    /// @dev Thrown when proxy is not found
    error ProxyNotFound(string name);
    
    /// @dev Thrown when implementation is invalid
    error InvalidImplementation(address implementation);
    
    /// @dev Thrown when string is empty
    error EmptyString();
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
import "@openzeppelin/contracts/utils/cryptography/EIP712.sol";
import "../libraries/DataStructures.sol";
import "../libraries/Constants.sol";
import "../libraries/Errors.sol";

/**
 * @title SignatureLibrary
 * @dev EIP-712 signature utilities for gasless trading
 * @author Blocklabs Studio
 */
library SignatureLibrary {
    using ECDSA for bytes32;

    // ============ TYPE HASHES ============

    /// @dev EIP-712 type hash for TradeOffer
    bytes32 public constant TRADE_OFFER_TYPEHASH =
        keccak256(
            "TradeOffer(address creator,address counterparty,Asset[] offeredAssets,Asset[] requestedAssets,uint256 expirationTime,uint256 sourceChainId,uint256 destinationChainId,uint8 settlementMode,uint256 nonce)"
        );

    /// @dev EIP-712 type hash for Asset
    bytes32 public constant ASSET_TYPEHASH =
        keccak256(
            "Asset(address tokenContract,uint256 tokenId,uint256 amount,uint8 assetType,uint256 chainId)"
        );

    /// @dev EIP-712 type hash for OfferSignature
    bytes32 public constant OFFER_SIGNATURE_TYPEHASH =
        keccak256(
            "OfferSignature(address creator,uint256 nonce,uint256 deadline,bytes32 offerHash)"
        );

    // ============ DOMAIN SEPARATOR FUNCTIONS ============

    /**
     * @dev Builds the domain separator for EIP-712
     * @param contractAddress The verifying contract address
     * @param chainId The chain ID
     * @return domainSeparator The EIP-712 domain separator
     */
    function buildDomainSeparator(
        address contractAddress,
        uint256 chainId
    ) internal pure returns (bytes32 domainSeparator) {
        return
            keccak256(
                abi.encode(
                    keccak256(
                        "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"
                    ),
                    keccak256(bytes(Constants.EIP712_DOMAIN_NAME)),
                    keccak256(bytes(Constants.EIP712_DOMAIN_VERSION)),
                    chainId,
                    contractAddress
                )
            );
    }

    // ============ HASH FUNCTIONS ============

    /**
     * @dev Hashes an Asset struct according to EIP-712
     * @param asset The asset to hash
     * @return assetHash The EIP-712 hash of the asset
     */
    function hashAsset(
        DataStructures.Asset memory asset
    ) internal pure returns (bytes32 assetHash) {
        return
            keccak256(
                abi.encode(
                    ASSET_TYPEHASH,
                    asset.tokenContract,
                    asset.tokenId,
                    asset.amount,
                    uint8(asset.assetType),
                    asset.chainId
                )
            );
    }

    /**
     * @dev Hashes an array of Assets according to EIP-712
     * @param assets The assets to hash
     * @return assetsHash The EIP-712 hash of the assets array
     */
    function hashAssets(
        DataStructures.Asset[] memory assets
    ) internal pure returns (bytes32 assetsHash) {
        bytes32[] memory assetHashes = new bytes32[](assets.length);
        for (uint256 i = 0; i < assets.length; i++) {
            assetHashes[i] = hashAsset(assets[i]);
        }
        return keccak256(abi.encodePacked(assetHashes));
    }

    /**
     * @dev Hashes a TradeOffer struct according to EIP-712
     * @param offer The trade offer to hash
     * @return offerHash The EIP-712 hash of the trade offer
     */
    function hashTradeOffer(
        DataStructures.TradeOffer memory offer
    ) internal pure returns (bytes32 offerHash) {
        return
            keccak256(
                abi.encode(
                    TRADE_OFFER_TYPEHASH,
                    offer.creator,
                    offer.counterparty,
                    hashAssets(offer.offeredAssets),
                    hashAssets(offer.requestedAssets),
                    offer.expirationTime,
                    offer.sourceChainId,
                    offer.destinationChainId,
                    uint8(offer.settlementMode),
                    offer.nonce
                )
            );
    }

    /**
     * @dev Hashes an OfferSignature struct according to EIP-712
     * @param offerSig The offer signature to hash
     * @return sigHash The EIP-712 hash of the offer signature
     */
    function hashOfferSignature(
        DataStructures.OfferSignature memory offerSig
    ) internal pure returns (bytes32 sigHash) {
        return
            keccak256(
                abi.encode(
                    OFFER_SIGNATURE_TYPEHASH,
                    offerSig.creator,
                    offerSig.nonce,
                    offerSig.deadline,
                    offerSig.offerHash
                )
            );
    }

    // ============ SIGNATURE VERIFICATION FUNCTIONS ============

    /**
     * @dev Verifies an EIP-712 signature for a trade offer
     * @param offer The trade offer
     * @param signature The signature to verify
     * @param domainSeparator The EIP-712 domain separator
     * @return signer The recovered signer address
     * @return isValid Whether the signature is valid
     */
    function verifyOfferSignature(
        DataStructures.TradeOffer memory offer,
        bytes memory signature,
        bytes32 domainSeparator
    ) internal pure returns (address signer, bool isValid) {
        bytes32 offerHash = hashTradeOffer(offer);
        bytes32 digest = keccak256(
            abi.encodePacked("\x19\x01", domainSeparator, offerHash)
        );

        address recoveredSigner = digest.recover(signature);
        return (
            recoveredSigner,
            recoveredSigner == offer.creator && recoveredSigner != address(0)
        );
    }

    /**
     * @dev Verifies an EIP-712 signature for an offer signature struct
     * @param offerSig The offer signature struct
     * @param signature The signature to verify
     * @param domainSeparator The EIP-712 domain separator
     * @return signer The recovered signer address
     * @return isValid Whether the signature is valid
     */
    function verifyOfferSignatureStruct(
        DataStructures.OfferSignature memory offerSig,
        bytes memory signature,
        bytes32 domainSeparator
    ) internal pure returns (address signer, bool isValid) {
        bytes32 sigHash = hashOfferSignature(offerSig);
        bytes32 digest = keccak256(
            abi.encodePacked("\x19\x01", domainSeparator, sigHash)
        );

        address recoveredSigner = digest.recover(signature);
        return (
            recoveredSigner,
            recoveredSigner == offerSig.creator && recoveredSigner != address(0)
        );
    }

    /**
     * @dev Verifies a generic EIP-712 signature
     * @param structHash The hash of the struct being signed
     * @param signature The signature to verify
     * @param domainSeparator The EIP-712 domain separator
     * @param expectedSigner The expected signer address
     * @return isValid Whether the signature is valid
     */
    function verifySignature(
        bytes32 structHash,
        bytes memory signature,
        bytes32 domainSeparator,
        address expectedSigner
    ) internal pure returns (bool isValid) {
        bytes32 digest = keccak256(
            abi.encodePacked("\x19\x01", domainSeparator, structHash)
        );

        address recoveredSigner = digest.recover(signature);
        return
            recoveredSigner == expectedSigner && recoveredSigner != address(0);
    }

    // ============ SIGNATURE VALIDATION FUNCTIONS ============

    /**
     * @dev Validates signature format and basic properties
     * @param signature The signature to validate
     * @return isValid Whether the signature format is valid
     */
    function validateSignatureFormat(
        bytes memory signature
    ) internal pure returns (bool isValid) {
        // Standard ECDSA signature should be 65 bytes
        if (signature.length != 65) {
            return false;
        }

        // Extract v, r, s components
        bytes32 r;
        bytes32 s;
        uint8 v;

        assembly {
            r := mload(add(signature, 32))
            s := mload(add(signature, 64))
            v := byte(0, mload(add(signature, 96)))
        }

        // Validate v value (should be 27 or 28)
        if (v != 27 && v != 28) {
            return false;
        }

        // Validate r and s are not zero
        if (r == 0 || s == 0) {
            return false;
        }

        // Validate s is in lower half of curve order (EIP-2)
        if (
            uint256(s) >
            0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0
        ) {
            return false;
        }

        return true;
    }

    /**
     * @dev Validates signature deadline
     * @param deadline The signature deadline
     * @return isValid Whether the deadline is valid
     */
    function validateSignatureDeadline(
        uint256 deadline
    ) internal view returns (bool isValid) {
        return block.timestamp <= deadline;
    }

    /**
     * @dev Validates signature nonce (to be used with nonce tracking)
     * @param signer The signer address
     * @param nonce The signature nonce
     * @param usedNonces Mapping of used nonces
     * @return isValid Whether the nonce is valid (not used)
     */
    function validateSignatureNonce(
        address signer,
        uint256 nonce,
        mapping(address => mapping(uint256 => bool)) storage usedNonces
    ) internal view returns (bool isValid) {
        return !usedNonces[signer][nonce];
    }

    /**
     * @dev Marks a signature nonce as used
     * @param signer The signer address
     * @param nonce The signature nonce
     * @param usedNonces Mapping of used nonces
     */
    function markNonceAsUsed(
        address signer,
        uint256 nonce,
        mapping(address => mapping(uint256 => bool)) storage usedNonces
    ) internal {
        usedNonces[signer][nonce] = true;
    }

    // ============ UTILITY FUNCTIONS ============

    /**
     * @dev Splits a signature into its r, s, v components
     * @param signature The signature to split
     * @return r The r component
     * @return s The s component
     * @return v The v component
     */
    function splitSignature(
        bytes memory signature
    ) internal pure returns (bytes32 r, bytes32 s, uint8 v) {
        if (signature.length != 65) {
            revert CustomErrors.InvalidSignatureFormat();
        }

        assembly {
            r := mload(add(signature, 32))
            s := mload(add(signature, 64))
            v := byte(0, mload(add(signature, 96)))
        }
    }

    /**
     * @dev Combines r, s, v components into a signature
     * @param r The r component
     * @param s The s component
     * @param v The v component
     * @return signature The combined signature
     */
    function combineSignature(
        bytes32 r,
        bytes32 s,
        uint8 v
    ) internal pure returns (bytes memory signature) {
        signature = new bytes(65);
        assembly {
            mstore(add(signature, 32), r)
            mstore(add(signature, 64), s)
            mstore8(add(signature, 96), v)
        }
    }

    /**
     * @dev Generates a message hash for signing
     * @param structHash The hash of the struct being signed
     * @param domainSeparator The EIP-712 domain separator
     * @return messageHash The message hash for signing
     */
    function getMessageHash(
        bytes32 structHash,
        bytes32 domainSeparator
    ) internal pure returns (bytes32 messageHash) {
        return
            keccak256(
                abi.encodePacked("\x19\x01", domainSeparator, structHash)
            );
    }

    /**
     * @dev Validates a complete offer signature including all checks
     * @param offer The trade offer
     * @param signature The signature to validate
     * @param domainSeparator The EIP-712 domain separator
     * @param usedNonces Mapping of used nonces
     * @return isValid Whether the signature is completely valid
     * @return reason Reason if signature is invalid
     */
    function validateCompleteOfferSignature(
        DataStructures.TradeOffer memory offer,
        bytes memory signature,
        bytes32 domainSeparator,
        mapping(address => mapping(uint256 => bool)) storage usedNonces
    ) internal view returns (bool isValid, string memory reason) {
        // Check signature format
        if (!validateSignatureFormat(signature)) {
            return (false, "Invalid signature format");
        }

        // Check nonce
        if (!validateSignatureNonce(offer.creator, offer.nonce, usedNonces)) {
            return (false, "Nonce already used");
        }

        // Verify signature
        (, bool sigValid) = verifyOfferSignature(
            offer,
            signature,
            domainSeparator
        );
        if (!sigValid) {
            return (false, "Invalid signature");
        }

        return (true, "");
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.28;

// Uncomment this line to use console.log
// import "hardhat/console.sol";

contract Lock {
    uint public unlockTime;
    address payable public owner;

    event Withdrawal(uint amount, uint when);

    constructor(uint _unlockTime) payable {
        require(
            block.timestamp < _unlockTime,
            "Unlock time should be in the future"
        );

        unlockTime = _unlockTime;
        owner = payable(msg.sender);
    }

    function withdraw() public {
        // Uncomment this line, and the import of "hardhat/console.sol", to print a log in your terminal
        // console.log("Unlock time is %o and block timestamp is %o", unlockTime, block.timestamp);

        require(block.timestamp >= unlockTime, "You can't withdraw yet");
        require(msg.sender == owner, "You aren't the owner");

        emit Withdrawal(address(this).balance, block.timestamp);

        owner.transfer(address(this).balance);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";

/**
 * @title MockERC20
 * @dev Mock ERC20 token for testing purposes
 */
contract MockERC20 is ERC20 {
    constructor(
        string memory name,
        string memory symbol,
        uint256 initialSupply
    ) ERC20(name, symbol) {
        _mint(msg.sender, initialSupply);
    }

    function mint(address to, uint256 amount) external {
        _mint(to, amount);
    }

    function burn(address from, uint256 amount) external {
        _burn(from, amount);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";

/**
 * @title MockERC721C
 * @dev Mock ERC721C contract for testing
 */
contract MockERC721C is ERC721 {
    uint8 private _transferPolicy;
    mapping(address => bool) private _whitelisted;
    address private _royaltyRecipient;
    uint256 private _royaltyAmount;
    bool private _shouldRevert;
    
    constructor() ERC721("MockERC721C", "M721C") {
        _transferPolicy = 0;
    }
    
    function setTransferPolicy(uint8 policy) external {
        _transferPolicy = policy;
    }
    
    function getTransferPolicy() external view returns (uint8) {
        if (_shouldRevert) {
            revert("Mock revert");
        }
        return _transferPolicy;
    }
    
    function setWhitelisted(address operator, bool whitelisted) external {
        _whitelisted[operator] = whitelisted;
    }
    
    function isWhitelisted(address operator) external view returns (bool) {
        if (_shouldRevert) {
            revert("Mock revert");
        }
        return _whitelisted[operator];
    }
    
    function setRoyaltyInfo(address recipient, uint256 amount) external {
        _royaltyRecipient = recipient;
        _royaltyAmount = amount;
    }
    
    function royaltyInfo(uint256, uint256) external view returns (address, uint256) {
        if (_shouldRevert) {
            revert("Mock revert");
        }
        return (_royaltyRecipient, _royaltyAmount);
    }
    
    function setShouldRevert(bool shouldRevert) external {
        _shouldRevert = shouldRevert;
    }
    
    function mint(address to, uint256 tokenId) external {
        _mint(to, tokenId);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

/**
 * @title ReentrancyAttacker
 * @dev Mock contract that attempts reentrancy attacks for testing
 */
contract ReentrancyAttacker {
    address private target;
    bool private attacking;
    
    constructor(address _target) {
        target = _target;
    }
    
    receive() external payable {
        if (!attacking) {
            attacking = true;
            // Attempt to call processRoyaltyPayment again
            (bool success,) = target.call{value: msg.value}(
                abi.encodeWithSignature(
                    "processRoyaltyPayment(uint256,address,uint256,uint256,address)",
                    1,
                    address(this),
                    123,
                    1 ether,
                    address(0)
                )
            );
            require(success, "Reentrancy attack failed");
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

/**
 * @title ReentrancyERC721CAttacker
 * @dev Mock ERC721C contract that attempts reentrancy attacks for testing
 */
contract ReentrancyERC721CAttacker {
    address private target;
    bool private attacking;
    
    constructor(address _target) {
        target = _target;
    }
    
    function getTransferPolicy() external returns (uint8) {
        if (!attacking) {
            attacking = true;
            // Attempt to call whitelistTradingContract again
            (bool success,) = target.call(
                abi.encodeWithSignature(
                    "whitelistTradingContract(address)",
                    address(this)
                )
            );
            require(success, "Reentrancy attack failed");
        }
        return 1;
    }
    
    function isWhitelisted(address) external pure returns (bool) {
        return false;
    }
    
    function royaltyInfo(uint256, uint256) external pure returns (address, uint256) {
        return (address(0), 0);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

/**
 * @title RejectingContract
 * @dev Mock contract that rejects native token transfers for testing
 */
contract RejectingContract {
    // This contract intentionally has no receive() or fallback() function
    // so it will reject native token transfers
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

import "@openzeppelin/contracts/proxy/transparent/ProxyAdmin.sol";
import "@openzeppelin/contracts/proxy/transparent/TransparentUpgradeableProxy.sol";

// This file imports proxy contracts to ensure Hardhat compiles them
// and their artifacts are available for Hardhat Ignition modules

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

import "@openzeppelin/contracts/proxy/transparent/TransparentUpgradeableProxy.sol";
import "@openzeppelin/contracts/proxy/transparent/ProxyAdmin.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "../libraries/Errors.sol";

/**
 * @title ProxyFactory
 * @dev Factory contract for deploying and managing upgradeable proxies
 * @author Blocklabs Studio
 */
contract ProxyFactory is Ownable {
    
    // ============ STATE VARIABLES ============
    
    /// @dev The ProxyAdmin contract that manages all proxies
    ProxyAdmin public immutable proxyAdmin;
    
    /// @dev Mapping of contract names to their implementation addresses
    mapping(string => address) private _implementations;
    
    /// @dev Mapping of contract names to their proxy addresses
    mapping(string => address) private _proxies;
    
    /// @dev Array of all deployed proxy addresses
    address[] private _allProxies;
    
    /// @dev Mapping to track if an address is a deployed proxy
    mapping(address => bool) private _isProxy;
    
    // ============ EVENTS ============
    
    /**
     * @dev Emitted when a new proxy is deployed
     */
    event ProxyDeployed(
        string indexed name,
        address indexed proxy,
        address indexed implementation
    );
    
    /**
     * @dev Emitted when an implementation is registered
     */
    event ImplementationRegistered(
        string indexed name,
        address indexed implementation
    );
    
    /**
     * @dev Emitted when a proxy is upgraded
     */
    event ProxyUpgraded(
        address indexed proxy,
        address indexed newImplementation
    );
    
    // ============ CONSTRUCTOR ============
    
    constructor(address _owner) Ownable(_owner) {
        if (_owner == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        proxyAdmin = new ProxyAdmin(_owner);
    }
    
    // ============ CORE FUNCTIONS ============
    
    function registerImplementation(string calldata name, address implementation) 
        external 
        onlyOwner 
    {
        if (implementation == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        if (bytes(name).length == 0) {
            revert CustomErrors.EmptyString();
        }
        
        if (implementation.code.length == 0) {
            revert CustomErrors.InvalidImplementation(implementation);
        }
        
        _implementations[name] = implementation;
        emit ImplementationRegistered(name, implementation);
    }
    
    function deployProxy(string calldata name, bytes calldata initData) 
        external 
        onlyOwner 
        returns (address proxy) 
    {
        address implementation = _implementations[name];
        if (implementation == address(0)) {
            revert CustomErrors.ImplementationNotFound(name);
        }
        
        if (_proxies[name] != address(0)) {
            revert CustomErrors.ProxyAlreadyExists(name);
        }
        
        proxy = address(new TransparentUpgradeableProxy(
            implementation,
            address(proxyAdmin),
            initData
        ));
        
        _proxies[name] = proxy;
        _allProxies.push(proxy);
        _isProxy[proxy] = true;
        
        emit ProxyDeployed(name, proxy, implementation);
        return proxy;
    }
    
    function upgradeProxy(string calldata name, address newImplementation) 
        external 
        onlyOwner 
    {
        address proxy = _proxies[name];
        if (proxy == address(0)) {
            revert CustomErrors.ProxyNotFound(name);
        }
        
        if (newImplementation == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        if (newImplementation.code.length == 0) {
            revert CustomErrors.InvalidImplementation(newImplementation);
        }
        
        proxyAdmin.upgradeAndCall(
            ITransparentUpgradeableProxy(proxy),
            newImplementation,
            ""
        );
        
        _implementations[name] = newImplementation;
        emit ProxyUpgraded(proxy, newImplementation);
    }
    
    // ============ VIEW FUNCTIONS ============
    
    function getImplementation(string calldata name) 
        external 
        view 
        returns (address implementation) 
    {
        return _implementations[name];
    }
    
    function getProxy(string calldata name) 
        external 
        view 
        returns (address proxy) 
    {
        return _proxies[name];
    }
    
    function getAllProxies() external view returns (address[] memory proxies) {
        return _allProxies;
    }
    
    function isProxy(address addr) external view returns (bool) {
        return _isProxy[addr];
    }
    
    function version() external pure returns (string memory) {
        return "1.0.0";
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts-upgradeable/utils/ReentrancyGuardUpgradeable.sol";
import "@openzeppelin/contracts/utils/introspection/IERC165.sol";
import "../interfaces/IAssetVerification.sol";
import "../libraries/DataStructures.sol";
import "../libraries/AssetLibrary.sol";
import "../libraries/Constants.sol";
import "../libraries/Errors.sol";
import "../core/AccessControl.sol";

/**
 * @title AssetVerification
 * @dev Asset validation and verification system for the Cross-Chain NFT Trading Platform
 * @author Blocklabs Studio
 */
contract AssetVerification is 
    Initializable,
    ReentrancyGuardUpgradeable,
    IAssetVerification
{
    
    // ============ STATE VARIABLES ============
    
    /// @dev Reference to the AccessControl contract
    AccessControl public accessControl;
    
    /// @dev Asset whitelist mapping
    mapping(address => bool) private _assetWhitelist;
    
    /// @dev Asset blacklist mapping
    mapping(address => bool) private _assetBlacklist;
    
    /// @dev Global blacklist for addresses
    mapping(address => bool) private _globalBlacklist;
    
    /// @dev Project configurations for ERC721C integration
    mapping(address => DataStructures.ProjectConfig) private _projectConfigs;
    
    /// @dev Supported asset types
    DataStructures.AssetType[] private _supportedAssetTypes;
    
    /// @dev Asset verification cache to optimize repeated checks
    mapping(bytes32 => DataStructures.AssetValidation) private _verificationCache;
    
    /// @dev Cache expiration timestamps
    mapping(bytes32 => uint256) private _cacheExpirations;
    
    /// @dev Cache duration (1 hour)
    uint256 private constant CACHE_DURATION = 1 hours;
    
    // ============ EVENTS ============
    
    /**
     * @dev Emitted when an asset is whitelisted or removed from whitelist
     * @param tokenContract The token contract address
     * @param whitelisted Whether the asset is whitelisted
     * @param updatedBy The address that updated the whitelist
     */
    event AssetWhitelisted(
        address indexed tokenContract,
        bool whitelisted,
        address indexed updatedBy
    );
    
    /**
     * @dev Emitted when an asset is blacklisted or removed from blacklist
     * @param tokenContract The token contract address
     * @param blacklisted Whether the asset is blacklisted
     * @param updatedBy The address that updated the blacklist
     */
    event AssetBlacklisted(
        address indexed tokenContract,
        bool blacklisted,
        address indexed updatedBy
    );
    
    /**
     * @dev Emitted when a project configuration is updated
     * @param tokenContract The token contract address
     * @param config The new project configuration
     * @param updatedBy The address that updated the configuration
     */
    event ProjectConfigUpdated(
        address indexed tokenContract,
        DataStructures.ProjectConfig config,
        address indexed updatedBy
    );
    
    /**
     * @dev Emitted when global blacklist is updated
     * @param account The account address
     * @param blacklisted Whether the account is blacklisted
     * @param updatedBy The address that updated the blacklist
     */
    event GlobalBlacklistUpdated(
        address indexed account,
        bool blacklisted,
        address indexed updatedBy
    );
    
    /**
     * @dev Emitted when verification cache is cleared
     * @param clearedBy The address that cleared the cache
     * @param timestamp The timestamp of cache clearing
     */
    event VerificationCacheCleared(
        address indexed clearedBy,
        uint256 timestamp
    );
    
    // ============ MODIFIERS ============
    
    /**
     * @dev Modifier to check if caller has project admin role
     */
    modifier onlyProjectAdmin() {
        if (!accessControl.hasRole(Constants.PROJECT_ADMIN_ROLE, msg.sender) && 
            !accessControl.hasRole(Constants.ADMIN_ROLE, msg.sender)) {
            revert CustomErrors.UnauthorizedAccess(msg.sender, Constants.PROJECT_ADMIN_ROLE);
        }
        _;
    }
    
    /**
     * @dev Modifier to check if caller has admin role
     */
    modifier onlyAdmin() {
        if (!accessControl.hasRole(Constants.ADMIN_ROLE, msg.sender)) {
            revert CustomErrors.UnauthorizedAccess(msg.sender, Constants.ADMIN_ROLE);
        }
        _;
    }
    
    /**
     * @dev Modifier to ensure contract is not paused
     */
    modifier whenNotPaused() {
        if (accessControl.paused()) {
            revert CustomErrors.ContractPaused();
        }
        _;
    }
    
    // ============ INITIALIZATION ============
    
    /**
     * @dev Initializes the AssetVerification contract
     * @param _accessControl Address of the AccessControl contract
     */
    function initialize(address _accessControl) public initializer {
        if (_accessControl == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        __ReentrancyGuard_init();
        
        accessControl = AccessControl(_accessControl);
        
        // Initialize supported asset types
        _supportedAssetTypes.push(DataStructures.AssetType.ERC721);
        _supportedAssetTypes.push(DataStructures.AssetType.ERC1155);
        _supportedAssetTypes.push(DataStructures.AssetType.ERC20);
        _supportedAssetTypes.push(DataStructures.AssetType.NATIVE);
    }
    
    // ============ CORE VERIFICATION FUNCTIONS ============
    
    /**
     * @dev Verifies an asset comprehensively
     * @param asset The asset to verify
     * @param owner The claimed owner of the asset
     * @return validation The complete asset validation result
     */
    function verifyAsset(DataStructures.Asset calldata asset, address owner) 
        external 
        view 
        override 
        returns (DataStructures.AssetValidation memory validation) 
    {
        // Generate cache key
        bytes32 cacheKey = _generateCacheKey(asset, owner);
        
        // Check cache first
        if (_isCacheValid(cacheKey)) {
            return _verificationCache[cacheKey];
        }
        
        // Perform comprehensive verification
        validation = _performAssetVerification(asset, owner);
        
        return validation;
    }
    
    /**
     * @dev Verifies asset ownership
     * @param asset The asset to verify
     * @param owner The claimed owner
     * @return owned Whether the owner owns the asset
     */
    function verifyAssetOwnership(DataStructures.Asset calldata asset, address owner) 
        external 
        view 
        override 
        returns (bool owned) 
    {
        return AssetLibrary.verifyOwnership(asset, owner);
    }
    
    /**
     * @dev Verifies asset transferability
     * @param asset The asset to verify
     * @param from The sender address
     * @param to The recipient address
     * @return transferable Whether the asset can be transferred
     */
    function verifyAssetTransferability(DataStructures.Asset calldata asset, address from, address to) 
        external 
        view 
        override 
        returns (bool transferable) 
    {
        // Check basic asset validation
        (bool valid, ) = AssetLibrary.validateAsset(asset);
        if (!valid) {
            return false;
        }
        
        // Check blacklist status
        if (_isBlacklisted(asset.tokenContract) || _globalBlacklist[from] || _globalBlacklist[to]) {
            return false;
        }
        
        // Check project-specific restrictions
        DataStructures.ProjectConfig memory config = _projectConfigs[asset.tokenContract];
        
        if (config.enforceBlacklist && (_globalBlacklist[from] || _globalBlacklist[to])) {
            return false;
        }
        
        if (config.enforceWhitelist && !_assetWhitelist[asset.tokenContract]) {
            return false;
        }
        
        // Check approval status
        return AssetLibrary.verifyApproval(asset, from, to);
    }
    
    // ============ WHITELIST/BLACKLIST FUNCTIONS ============
    
    /**
     * @dev Sets asset whitelist status
     * @param tokenContract The token contract address
     * @param whitelisted Whether the asset should be whitelisted
     */
    function setAssetWhitelist(address tokenContract, bool whitelisted) 
        external 
        override 
        onlyProjectAdmin 
        nonReentrant 
        whenNotPaused 
    {
        if (tokenContract == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        _assetWhitelist[tokenContract] = whitelisted;
        
        // Clear related cache entries
        _clearAssetCache(tokenContract);
        
        emit AssetWhitelisted(tokenContract, whitelisted, msg.sender);
    }
    
    /**
     * @dev Sets asset blacklist status
     * @param tokenContract The token contract address
     * @param blacklisted Whether the asset should be blacklisted
     */
    function setAssetBlacklist(address tokenContract, bool blacklisted) 
        external 
        override 
        onlyProjectAdmin 
        nonReentrant 
        whenNotPaused 
    {
        if (tokenContract == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        _assetBlacklist[tokenContract] = blacklisted;
        
        // Clear related cache entries
        _clearAssetCache(tokenContract);
        
        emit AssetBlacklisted(tokenContract, blacklisted, msg.sender);
    }
    
    /**
     * @dev Sets global blacklist status for an address
     * @param account The account address
     * @param blacklisted Whether the account should be blacklisted
     */
    function setGlobalBlacklist(address account, bool blacklisted) 
        external 
        onlyAdmin 
        nonReentrant 
        whenNotPaused 
    {
        if (account == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        _globalBlacklist[account] = blacklisted;
        
        emit GlobalBlacklistUpdated(account, blacklisted, msg.sender);
    }
    
    /**
     * @dev Sets project configuration
     * @param tokenContract The token contract address
     * @param config The project configuration
     */
    function setProjectConfig(address tokenContract, DataStructures.ProjectConfig calldata config) 
        external 
        override 
        onlyProjectAdmin 
        nonReentrant 
        whenNotPaused 
    {
        if (tokenContract == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        if (config.royaltyPercent > Constants.MAX_ROYALTY_PERCENT) {
            revert CustomErrors.FeePercentageTooHigh(config.royaltyPercent, Constants.MAX_ROYALTY_PERCENT);
        }
        
        _projectConfigs[tokenContract] = config;
        
        // Clear related cache entries
        _clearAssetCache(tokenContract);
        
        emit ProjectConfigUpdated(tokenContract, config, msg.sender);
    }
    
    // ============ BATCH OPERATIONS ============
    
    /**
     * @dev Batch sets whitelist status for multiple assets
     * @param tokenContracts Array of token contract addresses
     * @param whitelisted Array of whitelist statuses
     */
    function batchSetAssetWhitelist(
        address[] calldata tokenContracts, 
        bool[] calldata whitelisted
    ) external onlyProjectAdmin nonReentrant whenNotPaused {
        if (tokenContracts.length != whitelisted.length) {
            revert CustomErrors.ArrayLengthMismatch(tokenContracts.length, whitelisted.length);
        }
        
        if (tokenContracts.length == 0) {
            revert CustomErrors.EmptyArray();
        }
        
        for (uint256 i = 0; i < tokenContracts.length; i++) {
            if (tokenContracts[i] == address(0)) {
                revert CustomErrors.ZeroAddressNotAllowed();
            }
            
            _assetWhitelist[tokenContracts[i]] = whitelisted[i];
            _clearAssetCache(tokenContracts[i]);
            
            emit AssetWhitelisted(tokenContracts[i], whitelisted[i], msg.sender);
        }
    }
    
    /**
     * @dev Batch sets blacklist status for multiple assets
     * @param tokenContracts Array of token contract addresses
     * @param blacklisted Array of blacklist statuses
     */
    function batchSetAssetBlacklist(
        address[] calldata tokenContracts, 
        bool[] calldata blacklisted
    ) external onlyProjectAdmin nonReentrant whenNotPaused {
        if (tokenContracts.length != blacklisted.length) {
            revert CustomErrors.ArrayLengthMismatch(tokenContracts.length, blacklisted.length);
        }
        
        if (tokenContracts.length == 0) {
            revert CustomErrors.EmptyArray();
        }
        
        for (uint256 i = 0; i < tokenContracts.length; i++) {
            if (tokenContracts[i] == address(0)) {
                revert CustomErrors.ZeroAddressNotAllowed();
            }
            
            _assetBlacklist[tokenContracts[i]] = blacklisted[i];
            _clearAssetCache(tokenContracts[i]);
            
            emit AssetBlacklisted(tokenContracts[i], blacklisted[i], msg.sender);
        }
    }
    
    // ============ VIEW FUNCTIONS ============
    
    /**
     * @dev Checks if an asset is whitelisted
     * @param tokenContract The token contract address
     * @return whitelisted Whether the asset is whitelisted
     */
    function isAssetWhitelisted(address tokenContract) 
        external 
        view 
        override 
        returns (bool whitelisted) 
    {
        return _assetWhitelist[tokenContract];
    }
    
    /**
     * @dev Checks if an asset is blacklisted
     * @param tokenContract The token contract address
     * @return blacklisted Whether the asset is blacklisted
     */
    function isAssetBlacklisted(address tokenContract) 
        external 
        view 
        override 
        returns (bool blacklisted) 
    {
        return _isBlacklisted(tokenContract);
    }
    
    /**
     * @dev Gets project configuration for a token contract
     * @param tokenContract The token contract address
     * @return config The project configuration
     */
    function getProjectConfig(address tokenContract) 
        external 
        view 
        override 
        returns (DataStructures.ProjectConfig memory config) 
    {
        return _projectConfigs[tokenContract];
    }
    
    /**
     * @dev Gets supported asset types
     * @return assetTypes Array of supported asset types
     */
    function getSupportedAssetTypes() 
        external 
        view 
        override 
        returns (DataStructures.AssetType[] memory assetTypes) 
    {
        return _supportedAssetTypes;
    }
    
    /**
     * @dev Checks if an address is globally blacklisted
     * @param account The account address
     * @return blacklisted Whether the account is globally blacklisted
     */
    function isGloballyBlacklisted(address account) external view returns (bool blacklisted) {
        return _globalBlacklist[account];
    }
    
    // ============ CACHE MANAGEMENT ============
    
    /**
     * @dev Clears the verification cache
     */
    function clearVerificationCache() external onlyAdmin nonReentrant {
        // Note: In a production environment, you might want to implement
        // a more efficient cache clearing mechanism
        emit VerificationCacheCleared(msg.sender, block.timestamp);
    }
    
    /**
     * @dev Updates verification cache for an asset
     * @param asset The asset to cache
     * @param owner The asset owner
     * @param validation The validation result
     */
    function updateVerificationCache(
        DataStructures.Asset calldata asset,
        address owner,
        DataStructures.AssetValidation calldata validation
    ) external onlyProjectAdmin nonReentrant {
        bytes32 cacheKey = _generateCacheKey(asset, owner);
        _verificationCache[cacheKey] = validation;
        _cacheExpirations[cacheKey] = block.timestamp + CACHE_DURATION;
    }
    
    // ============ INTERNAL FUNCTIONS ============
    
    /**
     * @dev Performs comprehensive asset verification
     * @param asset The asset to verify
     * @param owner The claimed owner
     * @return validation The validation result
     */
    function _performAssetVerification(DataStructures.Asset memory asset, address owner) 
        internal 
        view 
        returns (DataStructures.AssetValidation memory validation) 
    {
        // Initialize validation result
        validation.isValid = true;
        validation.contractExists = true;
        validation.standardCompliant = true;
        validation.ownershipVerified = true;
        validation.transferAllowed = true;
        validation.notBlacklisted = true;
        validation.errorMessage = "";
        
        // Basic asset structure validation
        (bool structValid, string memory structError) = AssetLibrary.validateAsset(asset);
        if (!structValid) {
            validation.isValid = false;
            validation.errorMessage = structError;
            return validation;
        }
        
        // Check blacklist status
        if (_isBlacklisted(asset.tokenContract)) {
            validation.isValid = false;
            validation.notBlacklisted = false;
            validation.errorMessage = "Asset is blacklisted";
            return validation;
        }
        
        // Check global blacklist for owner
        if (_globalBlacklist[owner]) {
            validation.isValid = false;
            validation.notBlacklisted = false;
            validation.errorMessage = "Owner is globally blacklisted";
            return validation;
        }
        
        // Verify ownership
        if (!AssetLibrary.verifyOwnership(asset, owner)) {
            validation.isValid = false;
            validation.ownershipVerified = false;
            validation.errorMessage = "Ownership verification failed";
            return validation;
        }
        
        // Check project-specific configurations
        DataStructures.ProjectConfig memory config = _projectConfigs[asset.tokenContract];
        
        if (config.enforceWhitelist && !_assetWhitelist[asset.tokenContract]) {
            validation.isValid = false;
            validation.errorMessage = "Asset not whitelisted";
            return validation;
        }
        
        return validation;
    }
    
    /**
     * @dev Checks if an asset is blacklisted (including global blacklist)
     * @param tokenContract The token contract address
     * @return blacklisted Whether the asset is blacklisted
     */
    function _isBlacklisted(address tokenContract) internal view returns (bool blacklisted) {
        return _assetBlacklist[tokenContract] || _globalBlacklist[tokenContract];
    }
    
    /**
     * @dev Generates a cache key for asset verification
     * @param asset The asset
     * @param owner The owner address
     * @return cacheKey The generated cache key
     */
    function _generateCacheKey(DataStructures.Asset memory asset, address owner) 
        internal 
        pure 
        returns (bytes32 cacheKey) 
    {
        return keccak256(abi.encode(asset, owner));
    }
    
    /**
     * @dev Checks if a cache entry is valid
     * @param cacheKey The cache key
     * @return valid Whether the cache entry is valid
     */
    function _isCacheValid(bytes32 cacheKey) internal view returns (bool valid) {
        return _cacheExpirations[cacheKey] > block.timestamp;
    }
    
    /**
     * @dev Clears cache entries for a specific asset contract
     * @param tokenContract The token contract address
     */
    function _clearAssetCache(address tokenContract) internal {
        // Note: In a production environment, you might want to implement
        // a more efficient cache clearing mechanism that tracks cache keys
        // by token contract for easier clearing
    }
    
    /**
     * @dev Returns the version of the contract
     * @return version The contract version
     */
    function version() external pure returns (string memory) {
        return "1.0.0";
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts-upgradeable/utils/ReentrancyGuardUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/PausableUpgradeable.sol";
import "../libraries/DataStructures.sol";
import "../libraries/Constants.sol";
import "../libraries/Errors.sol";
import "../core/AccessControl.sol";

/**
 * @title SecurityManager
 * @dev Comprehensive security features including reentrancy protection, pausable functionality, and blacklist management
 * @author Blocklabs Studio
 */
contract SecurityManager is 
    Initializable,
    ReentrancyGuardUpgradeable,
    PausableUpgradeable
{
    
    // ============ STATE VARIABLES ============
    
    /// @dev Reference to the AccessControl contract
    AccessControl public accessControl;
    
    /// @dev Mapping of blacklisted addresses
    mapping(address => bool) private _blacklisted;
    
    /// @dev Mapping of whitelisted addresses (bypass certain restrictions)
    mapping(address => bool) private _whitelisted;
    
    /// @dev Mapping to track rate limiting per address
    mapping(address => RateLimit) private _rateLimits;
    
    /// @dev Mapping to track emergency stops per contract
    mapping(address => bool) private _emergencyStops;
    
    /// @dev Global emergency stop flag
    bool private _globalEmergencyStop;
    
    /// @dev Circuit breaker thresholds
    mapping(bytes32 => CircuitBreaker) private _circuitBreakers;
    
    /// @dev Security events log
    SecurityEvent[] private _securityEvents;
    
    /// @dev Maximum number of security events to store
    uint256 public constant MAX_SECURITY_EVENTS = 10000;
    
    // ============ STRUCTS ============
    
    struct RateLimit {
        uint256 count;          // Current count
        uint256 lastReset;      // Last reset timestamp
        uint256 limit;          // Rate limit threshold
        uint256 window;         // Time window in seconds
        bool enabled;           // Whether rate limiting is enabled
    }
    
    struct CircuitBreaker {
        uint256 failureCount;   // Number of failures
        uint256 threshold;      // Failure threshold
        uint256 lastFailure;    // Last failure timestamp
        uint256 cooldown;       // Cooldown period in seconds
        bool tripped;           // Whether circuit breaker is tripped
        bool enabled;           // Whether circuit breaker is enabled
    }
    
    struct SecurityEvent {
        address account;        // Account involved
        bytes32 eventType;      // Type of security event
        uint256 timestamp;      // Event timestamp
        bytes data;            // Additional event data
        uint256 severity;      // Event severity (1-5)
    }
    
    // ============ EVENTS ============
    
    /**
     * @dev Emitted when an address is blacklisted
     * @param account The blacklisted address
     * @param blacklisted Whether the address is blacklisted
     * @param reason The reason for blacklisting
     * @param blacklistedBy The address that performed the blacklisting
     */
    event AddressBlacklisted(
        address indexed account,
        bool blacklisted,
        string reason,
        address indexed blacklistedBy
    );
    
    /**
     * @dev Emitted when an address is whitelisted
     * @param account The whitelisted address
     * @param whitelisted Whether the address is whitelisted
     * @param whitelistedBy The address that performed the whitelisting
     */
    event AddressWhitelisted(
        address indexed account,
        bool whitelisted,
        address indexed whitelistedBy
    );
    
    /**
     * @dev Emitted when rate limit is exceeded
     * @param account The account that exceeded the limit
     * @param attempts The number of attempts
     * @param limit The rate limit
     * @param window The time window
     */
    event RateLimitExceeded(
        address indexed account,
        uint256 attempts,
        uint256 limit,
        uint256 window
    );
    
    /**
     * @dev Emitted when emergency stop is triggered
     * @param contract_ The contract address (0x0 for global)
     * @param stopped Whether emergency stop is active
     * @param triggeredBy The address that triggered the stop
     * @param reason The reason for emergency stop
     */
    event EmergencyStopTriggered(
        address indexed contract_,
        bool stopped,
        address indexed triggeredBy,
        string reason
    );
    
    /**
     * @dev Emitted when circuit breaker is tripped
     * @param operation The operation that tripped the breaker
     * @param failureCount The number of failures
     * @param threshold The failure threshold
     * @param cooldown The cooldown period
     */
    event CircuitBreakerTripped(
        bytes32 indexed operation,
        uint256 failureCount,
        uint256 threshold,
        uint256 cooldown
    );
    
    /**
     * @dev Emitted when a security event is logged
     * @param account The account involved
     * @param eventType The type of security event
     * @param severity The event severity
     * @param timestamp The event timestamp
     */
    event SecurityEventLogged(
        address indexed account,
        bytes32 indexed eventType,
        uint256 severity,
        uint256 timestamp
    );
    
    // ============ MODIFIERS ============
    
    /**
     * @dev Modifier to check if caller has emergency role
     */
    modifier onlyEmergency() {
        if (!accessControl.hasRole(Constants.EMERGENCY_ROLE, msg.sender) && 
            !accessControl.hasRole(Constants.ADMIN_ROLE, msg.sender)) {
            revert CustomErrors.UnauthorizedAccess(msg.sender, Constants.EMERGENCY_ROLE);
        }
        _;
    }
    
    /**
     * @dev Modifier to check if caller has project admin role
     */
    modifier onlyProjectAdmin() {
        if (!accessControl.hasRole(Constants.PROJECT_ADMIN_ROLE, msg.sender) && 
            !accessControl.hasRole(Constants.ADMIN_ROLE, msg.sender)) {
            revert CustomErrors.UnauthorizedAccess(msg.sender, Constants.PROJECT_ADMIN_ROLE);
        }
        _;
    }
    
    /**
     * @dev Modifier to check if address is not blacklisted
     */
    modifier notBlacklisted(address account) {
        if (_blacklisted[account] && !_whitelisted[account]) {
            revert CustomErrors.AddressBlacklisted(account);
        }
        _;
    }
    
    /**
     * @dev Modifier to check rate limits
     */
    modifier rateLimited(address account) {
        _checkRateLimit(account);
        _;
    }
    
    /**
     * @dev Modifier to check if emergency stop is not active
     */
    modifier notInEmergency() {
        if (_globalEmergencyStop) {
            revert CustomErrors.EmergencyStopActive();
        }
        _;
    }
    
    /**
     * @dev Modifier to check circuit breaker
     */
    modifier circuitBreakerCheck(bytes32 operation) {
        _checkCircuitBreaker(operation);
        _;
    }
    
    // ============ INITIALIZATION ============
    
    /**
     * @dev Initializes the SecurityManager contract
     * @param _accessControl Address of the AccessControl contract
     */
    function initialize(address _accessControl) public initializer {
        if (_accessControl == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        __ReentrancyGuard_init();
        __Pausable_init();
        
        accessControl = AccessControl(_accessControl);
    }
    
    // ============ BLACKLIST MANAGEMENT ============
    
    /**
     * @dev Blacklists an address
     * @param account The address to blacklist
     * @param reason The reason for blacklisting
     */
    function blacklistAddress(address account, string calldata reason) 
        external 
        onlyProjectAdmin 
        nonReentrant 
    {
        if (account == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        _blacklisted[account] = true;
        
        // Log security event
        _logSecurityEvent(
            account,
            keccak256("BLACKLISTED"),
            abi.encode(reason),
            4 // High severity
        );
        
        emit AddressBlacklisted(account, true, reason, msg.sender);
    }
    
    /**
     * @dev Removes an address from blacklist
     * @param account The address to remove from blacklist
     */
    function removeFromBlacklist(address account) 
        external 
        onlyProjectAdmin 
        nonReentrant 
    {
        if (account == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        _blacklisted[account] = false;
        
        // Log security event
        _logSecurityEvent(
            account,
            keccak256("BLACKLIST_REMOVED"),
            abi.encode("Removed from blacklist"),
            2 // Medium severity
        );
        
        emit AddressBlacklisted(account, false, "Removed from blacklist", msg.sender);
    }
    
    /**
     * @dev Whitelists an address (bypasses blacklist)
     * @param account The address to whitelist
     */
    function whitelistAddress(address account) 
        external 
        onlyProjectAdmin 
        nonReentrant 
    {
        if (account == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        _whitelisted[account] = true;
        
        emit AddressWhitelisted(account, true, msg.sender);
    }
    
    /**
     * @dev Removes an address from whitelist
     * @param account The address to remove from whitelist
     */
    function removeFromWhitelist(address account) 
        external 
        onlyProjectAdmin 
        nonReentrant 
    {
        if (account == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        _whitelisted[account] = false;
        
        emit AddressWhitelisted(account, false, msg.sender);
    }
    
    /**
     * @dev Batch blacklists multiple addresses
     * @param accounts Array of addresses to blacklist
     * @param reasons Array of reasons for blacklisting
     */
    function batchBlacklistAddresses(
        address[] calldata accounts,
        string[] calldata reasons
    ) external onlyProjectAdmin nonReentrant {
        if (accounts.length != reasons.length) {
            revert CustomErrors.ArrayLengthMismatch(accounts.length, reasons.length);
        }
        
        if (accounts.length == 0) {
            revert CustomErrors.EmptyArray();
        }
        
        for (uint256 i = 0; i < accounts.length; i++) {
            if (accounts[i] == address(0)) {
                revert CustomErrors.ZeroAddressNotAllowed();
            }
            
            _blacklisted[accounts[i]] = true;
            
            // Log security event
            _logSecurityEvent(
                accounts[i],
                keccak256("BLACKLISTED"),
                abi.encode(reasons[i]),
                4 // High severity
            );
            
            emit AddressBlacklisted(accounts[i], true, reasons[i], msg.sender);
        }
    }
    
    // ============ RATE LIMITING ============
    
    /**
     * @dev Sets rate limit for an address
     * @param account The address to set rate limit for
     * @param limit The rate limit threshold
     * @param window The time window in seconds
     */
    function setRateLimit(address account, uint256 limit, uint256 window) 
        external 
        onlyProjectAdmin 
        nonReentrant 
    {
        if (account == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        if (limit == 0 || window == 0) {
            revert CustomErrors.ValueOutOfRange(limit == 0 ? limit : window, 1, type(uint256).max);
        }
        
        _rateLimits[account] = RateLimit({
            count: 0,
            lastReset: block.timestamp,
            limit: limit,
            window: window,
            enabled: true
        });
    }
    
    /**
     * @dev Disables rate limiting for an address
     * @param account The address to disable rate limiting for
     */
    function disableRateLimit(address account) 
        external 
        onlyProjectAdmin 
        nonReentrant 
    {
        if (account == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        _rateLimits[account].enabled = false;
    }
    
    // ============ EMERGENCY CONTROLS ============
    
    /**
     * @dev Triggers global emergency stop
     * @param reason The reason for emergency stop
     */
    function triggerGlobalEmergencyStop(string calldata reason) 
        external 
        onlyEmergency 
        nonReentrant 
    {
        _globalEmergencyStop = true;
        
        // Log security event
        _logSecurityEvent(
            msg.sender,
            keccak256("GLOBAL_EMERGENCY_STOP"),
            abi.encode(reason),
            5 // Critical severity
        );
        
        emit EmergencyStopTriggered(address(0), true, msg.sender, reason);
    }
    
    /**
     * @dev Lifts global emergency stop
     */
    function liftGlobalEmergencyStop() 
        external 
        onlyEmergency 
        nonReentrant 
    {
        _globalEmergencyStop = false;
        
        // Log security event
        _logSecurityEvent(
            msg.sender,
            keccak256("GLOBAL_EMERGENCY_STOP_LIFTED"),
            abi.encode("Emergency stop lifted"),
            3 // Medium-high severity
        );
        
        emit EmergencyStopTriggered(address(0), false, msg.sender, "Emergency stop lifted");
    }
    
    /**
     * @dev Triggers emergency stop for a specific contract
     * @param contract_ The contract address
     * @param reason The reason for emergency stop
     */
    function triggerContractEmergencyStop(address contract_, string calldata reason) 
        external 
        onlyEmergency 
        nonReentrant 
    {
        if (contract_ == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        _emergencyStops[contract_] = true;
        
        // Log security event
        _logSecurityEvent(
            contract_,
            keccak256("CONTRACT_EMERGENCY_STOP"),
            abi.encode(reason),
            4 // High severity
        );
        
        emit EmergencyStopTriggered(contract_, true, msg.sender, reason);
    }
    
    /**
     * @dev Lifts emergency stop for a specific contract
     * @param contract_ The contract address
     */
    function liftContractEmergencyStop(address contract_) 
        external 
        onlyEmergency 
        nonReentrant 
    {
        if (contract_ == address(0)) {
            revert CustomErrors.ZeroAddressNotAllowed();
        }
        
        _emergencyStops[contract_] = false;
        
        // Log security event
        _logSecurityEvent(
            contract_,
            keccak256("CONTRACT_EMERGENCY_STOP_LIFTED"),
            abi.encode("Contract emergency stop lifted"),
            3 // Medium-high severity
        );
        
        emit EmergencyStopTriggered(contract_, false, msg.sender, "Contract emergency stop lifted");
    }
    
    /**
     * @dev Pauses the contract
     */
    function pause() external onlyEmergency {
        _pause();
        
        // Log security event
        _logSecurityEvent(
            msg.sender,
            keccak256("CONTRACT_PAUSED"),
            abi.encode("Contract paused"),
            4 // High severity
        );
    }
    
    /**
     * @dev Unpauses the contract
     */
    function unpause() external onlyEmergency {
        _unpause();
        
        // Log security event
        _logSecurityEvent(
            msg.sender,
            keccak256("CONTRACT_UNPAUSED"),
            abi.encode("Contract unpaused"),
            3 // Medium-high severity
        );
    }
    
    // ============ CIRCUIT BREAKER ============
    
    /**
     * @dev Sets up a circuit breaker for an operation
     * @param operation The operation identifier
     * @param threshold The failure threshold
     * @param cooldown The cooldown period in seconds
     */
    function setupCircuitBreaker(
        bytes32 operation,
        uint256 threshold,
        uint256 cooldown
    ) external onlyProjectAdmin nonReentrant {
        if (threshold == 0 || cooldown == 0) {
            revert CustomErrors.ValueOutOfRange(threshold == 0 ? threshold : cooldown, 1, type(uint256).max);
        }
        
        _circuitBreakers[operation] = CircuitBreaker({
            failureCount: 0,
            threshold: threshold,
            lastFailure: 0,
            cooldown: cooldown,
            tripped: false,
            enabled: true
        });
    }
    
    /**
     * @dev Records a failure for circuit breaker tracking
     * @param operation The operation identifier
     */
    function recordFailure(bytes32 operation) 
        external 
        nonReentrant 
    {
        CircuitBreaker storage breaker = _circuitBreakers[operation];
        
        if (!breaker.enabled) {
            return;
        }
        
        breaker.failureCount++;
        breaker.lastFailure = block.timestamp;
        
        if (breaker.failureCount >= breaker.threshold && !breaker.tripped) {
            breaker.tripped = true;
            
            // Log security event
            _logSecurityEvent(
                msg.sender,
                keccak256("CIRCUIT_BREAKER_TRIPPED"),
                abi.encode(operation),
                4 // High severity
            );
            
            emit CircuitBreakerTripped(
                operation,
                breaker.failureCount,
                breaker.threshold,
                breaker.cooldown
            );
        }
    }
    
    /**
     * @dev Resets a circuit breaker
     * @param operation The operation identifier
     */
    function resetCircuitBreaker(bytes32 operation) 
        external 
        onlyProjectAdmin 
        nonReentrant 
    {
        CircuitBreaker storage breaker = _circuitBreakers[operation];
        
        breaker.failureCount = 0;
        breaker.tripped = false;
        breaker.lastFailure = 0;
    }
    
    // ============ VIEW FUNCTIONS ============
    
    /**
     * @dev Checks if an address is blacklisted
     * @param account The address to check
     * @return blacklisted Whether the address is blacklisted
     */
    function isBlacklisted(address account) external view returns (bool blacklisted) {
        return _blacklisted[account] && !_whitelisted[account];
    }
    
    /**
     * @dev Checks if an address is whitelisted
     * @param account The address to check
     * @return whitelisted Whether the address is whitelisted
     */
    function isWhitelisted(address account) external view returns (bool whitelisted) {
        return _whitelisted[account];
    }
    
    /**
     * @dev Gets rate limit information for an address
     * @param account The address to check
     * @return rateLimit The rate limit information
     */
    function getRateLimit(address account) external view returns (RateLimit memory rateLimit) {
        return _rateLimits[account];
    }
    
    /**
     * @dev Checks if global emergency stop is active
     * @return active Whether global emergency stop is active
     */
    function isGlobalEmergencyStopActive() external view returns (bool active) {
        return _globalEmergencyStop;
    }
    
    /**
     * @dev Checks if contract emergency stop is active
     * @param contract_ The contract address
     * @return active Whether contract emergency stop is active
     */
    function isContractEmergencyStopActive(address contract_) external view returns (bool active) {
        return _emergencyStops[contract_];
    }
    
    /**
     * @dev Gets circuit breaker information
     * @param operation The operation identifier
     * @return breaker The circuit breaker information
     */
    function getCircuitBreaker(bytes32 operation) external view returns (CircuitBreaker memory breaker) {
        return _circuitBreakers[operation];
    }
    
    /**
     * @dev Gets recent security events
     * @param count The number of events to retrieve
     * @return events Array of recent security events
     */
    function getRecentSecurityEvents(uint256 count) 
        external 
        view 
        returns (SecurityEvent[] memory events) 
    {
        uint256 totalEvents = _securityEvents.length;
        if (totalEvents == 0) {
            return new SecurityEvent[](0);
        }
        
        uint256 returnCount = count > totalEvents ? totalEvents : count;
        events = new SecurityEvent[](returnCount);
        
        for (uint256 i = 0; i < returnCount; i++) {
            events[i] = _securityEvents[totalEvents - 1 - i];
        }
        
        return events;
    }
    
    /**
     * @dev Gets security statistics
     * @return totalBlacklisted Total blacklisted addresses
     * @return totalWhitelisted Total whitelisted addresses
     * @return totalSecurityEvents Total security events logged
     * @return globalEmergencyActive Whether global emergency is active
     */
    function getSecurityStats() 
        external 
        view 
        returns (
            uint256 totalBlacklisted,
            uint256 totalWhitelisted,
            uint256 totalSecurityEvents,
            bool globalEmergencyActive
        ) 
    {
        // Note: These would need separate tracking in production
        totalBlacklisted = 0;
        totalWhitelisted = 0;
        totalSecurityEvents = _securityEvents.length;
        globalEmergencyActive = _globalEmergencyStop;
    }
    
    // ============ INTERNAL FUNCTIONS ============
    
    /**
     * @dev Checks rate limit for an address
     * @param account The address to check
     */
    function _checkRateLimit(address account) internal {
        RateLimit storage rateLimit = _rateLimits[account];
        
        if (!rateLimit.enabled || _whitelisted[account]) {
            return;
        }
        
        // Reset counter if window has passed
        if (block.timestamp >= rateLimit.lastReset + rateLimit.window) {
            rateLimit.count = 0;
            rateLimit.lastReset = block.timestamp;
        }
        
        rateLimit.count++;
        
        if (rateLimit.count > rateLimit.limit) {
            // Log security event
            _logSecurityEvent(
                account,
                keccak256("RATE_LIMIT_EXCEEDED"),
                abi.encode(rateLimit.count, rateLimit.limit),
                3 // Medium-high severity
            );
            
            emit RateLimitExceeded(account, rateLimit.count, rateLimit.limit, rateLimit.window);
            revert CustomErrors.RateLimitExceeded(account, rateLimit.count, rateLimit.limit);
        }
    }
    
    /**
     * @dev Checks circuit breaker for an operation
     * @param operation The operation identifier
     */
    function _checkCircuitBreaker(bytes32 operation) internal view {
        CircuitBreaker storage breaker = _circuitBreakers[operation];
        
        if (!breaker.enabled || !breaker.tripped) {
            return;
        }
        
        // Check if cooldown period has passed
        if (block.timestamp < breaker.lastFailure + breaker.cooldown) {
            revert CustomErrors.OperationNotSupported("Circuit breaker tripped");
        }
    }
    
    /**
     * @dev Logs a security event
     * @param account The account involved
     * @param eventType The type of security event
     * @param data Additional event data
     * @param severity The event severity (1-5)
     */
    function _logSecurityEvent(
        address account,
        bytes32 eventType,
        bytes memory data,
        uint256 severity
    ) internal {
        // Remove oldest events if at capacity
        if (_securityEvents.length >= MAX_SECURITY_EVENTS) {
            // Shift array left (remove first element)
            for (uint256 i = 0; i < _securityEvents.length - 1; i++) {
                _securityEvents[i] = _securityEvents[i + 1];
            }
            _securityEvents.pop();
        }
        
        _securityEvents.push(SecurityEvent({
            account: account,
            eventType: eventType,
            timestamp: block.timestamp,
            data: data,
            severity: severity
        }));
        
        emit SecurityEventLogged(account, eventType, severity, block.timestamp);
    }
    
    /**
     * @dev Returns the version of the contract
     * @return version The contract version
     */
    function version() external pure returns (string memory) {
        return "1.0.0";
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 1000
  },
  "evmVersion": "paris",
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"address","name":"_logic","type":"address"},{"internalType":"address","name":"initialOwner","type":"address"},{"internalType":"bytes","name":"_data","type":"bytes"}],"stateMutability":"payable","type":"constructor"},{"inputs":[{"internalType":"address","name":"target","type":"address"}],"name":"AddressEmptyCode","type":"error"},{"inputs":[{"internalType":"address","name":"admin","type":"address"}],"name":"ERC1967InvalidAdmin","type":"error"},{"inputs":[{"internalType":"address","name":"implementation","type":"address"}],"name":"ERC1967InvalidImplementation","type":"error"},{"inputs":[],"name":"ERC1967NonPayable","type":"error"},{"inputs":[],"name":"FailedCall","type":"error"},{"inputs":[],"name":"ProxyDeniedAdminAccess","type":"error"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"previousAdmin","type":"address"},{"indexed":false,"internalType":"address","name":"newAdmin","type":"address"}],"name":"AdminChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"implementation","type":"address"}],"name":"Upgraded","type":"event"},{"stateMutability":"payable","type":"fallback"}]

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