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// SPDX-License-Identifier: MIT
pragma solidity 0.8.23;

import {OwnableUpgradeable} from '@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol';
import {ERC20} from '@openzeppelin/contracts/token/ERC20/ERC20.sol';

import {AssetUtils} from 'contracts/common/AssetUtils.sol';
import {Constants as Common} from 'contracts/common/Constants.sol';
import {MessageLib} from 'contracts/common/MessageLib.sol';
import {TypeCasts} from 'contracts/common/TypeCasts.sol';

import {IMessageReceiver} from 'interfaces/common/IMessageReceiver.sol';
import {ISettlementModule} from 'interfaces/common/ISettlementModule.sol';
import {ISpokeGateway} from 'interfaces/intent/ISpokeGateway.sol';

import {SpokeStorage} from 'contracts/intent/SpokeStorage.sol';

contract SpokeMessageReceiver is SpokeStorage, OwnableUpgradeable, IMessageReceiver {
  using TypeCasts for bytes32;

  /**
   * @notice Checks that the function is called by the gateway
   */
  modifier onlyAuthorized() {
    if (msg.sender != owner() && (msg.sender != address(gateway) || paused)) {
      revert EverclearSpoke_Unauthorized();
    }
    _;
  }

  /// @inheritdoc IMessageReceiver
  function receiveMessage(
    bytes memory _message
  ) external onlyAuthorized {
    (MessageLib.MessageType _messageType, bytes memory _data) = MessageLib.parseMessage(_message);

    if (_messageType == MessageLib.MessageType.SETTLEMENT) {
      _handleBatchSettlement(_data);
    } else if (_messageType == MessageLib.MessageType.VAR_UPDATE) {
      (bytes32 _updateVariable, bytes memory _updateData) = MessageLib.parseVarUpdateMessage(_data);
      _handleVarUpdate(_updateVariable, _updateData);
    } else {
      revert EverclearSpoke_InvalidMessageType();
    }
  }

  /**
   * @notice handle a variable update message
   * @param _updateVariable The hash of the variable being updated
   * @param _updateData The data of the update
   */
  function _handleVarUpdate(bytes32 _updateVariable, bytes memory _updateData) internal {
    if (_updateVariable == Common.GATEWAY_HASH) {
      address _newGateway = MessageLib.parseAddressUpdateMessage(_updateData).toAddress();
      _updateGateway(_newGateway);
    } else if (_updateVariable == Common.MAILBOX_HASH) {
      address _newMailbox = MessageLib.parseAddressUpdateMessage(_updateData).toAddress();
      _updateMailbox(_newMailbox);
    } else if (_updateVariable == Common.LIGHTHOUSE_HASH) {
      address _newLighthouse = MessageLib.parseAddressUpdateMessage(_updateData).toAddress();
      _updateLighthouse(_newLighthouse);
    } else if (_updateVariable == Common.WATCHTOWER_HASH) {
      address _newWatchtower = MessageLib.parseAddressUpdateMessage(_updateData).toAddress();
      _updateWatchtower(_newWatchtower);
    } else {
      revert EverclearSpoke_InvalidVarUpdate();
    }
  }

  /**
   * @notice Handles a batch of settlement messages
   * @param _data The batch of settlement messages
   */
  function _handleBatchSettlement(
    bytes memory _data
  ) internal {
    Settlement[] memory _settlementMessage = MessageLib.parseSettlementBatch(_data);
    for (uint256 _i; _i < _settlementMessage.length; _i++) {
      Settlement memory _message = _settlementMessage[_i];
      _handleSettlement(_message);
    }
  }

  /**
   * @notice Handles a settlement message
   * @param _message The settlement message
   */
  function _handleSettlement(
    Settlement memory _message
  ) internal {
    address _asset = _message.asset.toAddress();
    address _recipient = _message.recipient.toAddress();

    IntentStatus _intentStatus = status[_message.intentId];
    // if already settled, ignore (shouldn't happen)
    if (_intentStatus == IntentStatus.SETTLED || _intentStatus == IntentStatus.SETTLED_AND_MANUALLY_EXECUTED) {
      return;
    }
    status[_message.intentId] = IntentStatus.SETTLED;

    uint256 _amount =
      AssetUtils.normalizeDecimals(Common.DEFAULT_NORMALIZED_DECIMALS, ERC20(_asset).decimals(), _message.amount);

    // after decimals normalization, the _amount can be 0 as result of loss of precision, check if it's > 0
    if (_amount > 0) {
      // if amount is > 0 proceed with the settlement according to the strategy
      // fetch strategy for asset
      Strategy _strategy = strategies[_asset];

      if (_strategy == Strategy.DEFAULT) {
        // default strategy
        if (_message.updateVirtualBalance) {
          balances[_message.asset][_message.recipient] += _amount;
        } else {
          // if transfer fails (eg. blacklisted recipient), increase virtual balance instead
          bytes memory _transferData = abi.encodeWithSignature('transfer(address,uint256)', _recipient, _amount);
          (bool _success, bytes memory _res) = _asset.call(_transferData);

          // doing the transfer as a low-level call to avoid reverting the whole batch if the transfer calls revert
          // applying the same checks as `SafeERC20` for the `transfer` as it can't be wrapped in a `try/catch` block
          if (!_success || (_res.length != 0 && !abi.decode(_res, (bool)))) {
            balances[_message.asset][_message.recipient] += _amount;
            emit AssetTransferFailed(_asset, _recipient, _amount);
          }
        }
      } else {
        // dedicated strategy
        ISettlementModule _module = modules[_strategy];
        address _mintRecipient = _message.updateVirtualBalance ? address(this) : _recipient;
        bool _success = _module.handleMintStrategy(_asset, _mintRecipient, _recipient, _amount, '');

        if (_success && _message.updateVirtualBalance) {
          balances[_message.asset][_message.recipient] += _amount;
        } else if (!_success) {
          emit AssetMintFailed(_asset, _recipient, _amount, _strategy);
        }
      }
    }
    emit Settled(_message.intentId, _recipient, _asset, _amount);
  }

  /**
   * @notice Update the gateway
   * @param _newGateway The new gateway address
   */
  function _updateGateway(
    address _newGateway
  ) internal validAddress(_newGateway) {
    address _oldGateway = address(gateway);
    gateway = ISpokeGateway(_newGateway);
    emit GatewayUpdated(_oldGateway, _newGateway);
  }

  /**
   * @notice Update the local mailbox address
   * @param _newMailbox The new mailbox address
   */
  function _updateMailbox(
    address _newMailbox
  ) internal {
    gateway.updateMailbox(_newMailbox);
  }

  /**
   * @notice Update the interchain security module address
   * @param _newSecurityModule The new security module address
   */
  function _updateSecurityModule(
    address _newSecurityModule
  ) internal {
    gateway.updateSecurityModule(_newSecurityModule);
  }

  /**
   * @notice Update the lighthouse address
   * @param _newLighthouse The new lighthouse address
   */
  function _updateLighthouse(
    address _newLighthouse
  ) internal validAddress(_newLighthouse) {
    address _oldLighthouse = lighthouse;
    lighthouse = _newLighthouse;
    emit LighthouseUpdated(_oldLighthouse, _newLighthouse);
  }

  /**
   * @notice Update the watchtower address
   * @param _newWatchtower The new watchtower address
   */
  function _updateWatchtower(
    address _newWatchtower
  ) internal validAddress(_newWatchtower) {
    address _oldWatchtower = watchtower;
    watchtower = _newWatchtower;

    emit WatchtowerUpdated(_oldWatchtower, _newWatchtower);
  }
}

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

pragma solidity ^0.8.20;

import {ContextUpgradeable} from "../utils/ContextUpgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.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 OwnableUpgradeable is Initializable, ContextUpgradeable {
    /// @custom:storage-location erc7201:openzeppelin.storage.Ownable
    struct OwnableStorage {
        address _owner;
    }

    // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Ownable")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant OwnableStorageLocation = 0x9016d09d72d40fdae2fd8ceac6b6234c7706214fd39c1cd1e609a0528c199300;

    function _getOwnableStorage() private pure returns (OwnableStorage storage $) {
        assembly {
            $.slot := OwnableStorageLocation
        }
    }

    /**
     * @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.
     */
    function __Ownable_init(address initialOwner) internal onlyInitializing {
        __Ownable_init_unchained(initialOwner);
    }

    function __Ownable_init_unchained(address initialOwner) internal onlyInitializing {
        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) {
        OwnableStorage storage $ = _getOwnableStorage();
        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 {
        OwnableStorage storage $ = _getOwnableStorage();
        address oldOwner = $._owner;
        $._owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (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 ERC20
 * applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 */
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}.
     *
     * All two of these 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;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    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;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    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}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * 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:
     * ```
     * 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
pragma solidity 0.8.23;

/**
 * @title AssetUtils
 * @notice Library for asset utility functions
 */
library AssetUtils {
  /**
   * @notice This function translates the _amount in _in decimals
   * to _out decimals
   *
   * @param _in The decimals of the asset in / amount in
   * @param _out The decimals of the target asset
   * @param _amount The value to normalize to the `_out` decimals
   * @return _normalized Normalized decimals.
   */
  function normalizeDecimals(uint8 _in, uint8 _out, uint256 _amount) internal pure returns (uint256 _normalized) {
    if (_in == _out) {
      return _amount;
    }
    // Convert this value to the same decimals as _out
    if (_in < _out) {
      _normalized = _amount * (10 ** (_out - _in));
    } else {
      _normalized = _amount / (10 ** (_in - _out));
    }
  }

  /**
   * @notice Get the hash of an asset
   * @param _asset The address of the asset
   * @param _domain The domain of the asset
   * @return _assetHash The hash of the asset
   */
  function getAssetHash(bytes32 _asset, uint32 _domain) internal pure returns (bytes32 _assetHash) {
    return keccak256(abi.encode(_asset, _domain));
  }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.23;

library Constants {
  // Default normalized decimals for tokens
  uint8 public constant DEFAULT_NORMALIZED_DECIMALS = 18;
  // 1/10 of a basis point denominator
  uint24 public constant DBPS_DENOMINATOR = 100_000;

  // Precomputed hashes (reduce gas costs)
  bytes32 public constant GATEWAY_HASH = keccak256(abi.encode('GATEWAY'));
  bytes32 public constant MAILBOX_HASH = keccak256(abi.encode('MAILBOX'));
  bytes32 public constant LIGHTHOUSE_HASH = keccak256(abi.encode('LIGHTHOUSE'));
  bytes32 public constant WATCHTOWER_HASH = keccak256(abi.encode('WATCHTOWER'));
  bytes32 public constant MAX_FEE_HASH = keccak256(abi.encode('MAX_FEE'));
  bytes32 public constant INTENT_TTL_HASH = keccak256(abi.encode('INTENT_TTL'));

  // Default gas limit for external calls
  uint256 public constant DEFAULT_GAS_LIMIT = 50_000;
  // Maximum calldata size for external calls
  uint256 public constant MAX_CALLDATA_SIZE = 50_000;
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.23;

import {IEverclear} from 'interfaces/common/IEverclear.sol';

library MessageLib {
  /*//////////////////////////////////////////////////////////////
                            ENUMS
  //////////////////////////////////////////////////////////////*/

  /**
   * @dev Enum for message types
   * INTENT: Intent message type
   * FILL: Fill message type
   * SETTLEMENT: Settlement message type
   * VAR_UPDATE: Variable update message type
   */
  enum MessageType {
    INTENT,
    FILL,
    SETTLEMENT,
    VAR_UPDATE
  }

  /*//////////////////////////////////////////////////////////////
                      GENERAL PURPOSE FUNCTIONS
  //////////////////////////////////////////////////////////////*/

  /**
   * @dev Formats a message with a message type and data
   * @param _messageType The message type
   * @param _data The data to send in the message
   * @return _message The formatted message
   */
  function formatMessage(MessageType _messageType, bytes memory _data) internal pure returns (bytes memory _message) {
    _message = abi.encode(uint8(_messageType), _data);
  }

  /**
   * @dev Parses a message into its message type and data
   * @param _message The message to parse
   * @return _messageType The message type
   * @return _data The data in the message
   */
  function parseMessage(
    bytes memory _message
  ) internal pure returns (MessageType _messageType, bytes memory _data) {
    uint8 _msgTypeNumber;
    (_msgTypeNumber, _data) = abi.decode(_message, (uint8, bytes));
    _messageType = MessageType(_msgTypeNumber);
  }

  /*//////////////////////////////////////////////////////////////
                        MESSAGE FORMATTING
  //////////////////////////////////////////////////////////////*/

  /**
   * @dev Formats an intent message
   * @param _intents Array of intents
   * @return _message The formatted intent message
   */
  function formatIntentMessageBatch(
    IEverclear.Intent[] memory _intents
  ) internal pure returns (bytes memory _message) {
    _message = formatMessage(MessageType.INTENT, abi.encode(_intents));
  }

  /**
   * @dev Formats a fill message
   * @param _fillMessages Array of fill messages
   * @return _message The formatted fill message
   */
  function formatFillMessageBatch(
    IEverclear.FillMessage[] memory _fillMessages
  ) internal pure returns (bytes memory _message) {
    _message = formatMessage(MessageType.FILL, abi.encode(_fillMessages));
  }

  /**
   * @dev Formats a settlement message
   * @param _settlementMessages Array of settlement messages
   * @return _message The formatted settlement message
   */
  function formatSettlementBatch(
    IEverclear.Settlement[] memory _settlementMessages
  ) internal pure returns (bytes memory _message) {
    _message = formatMessage(MessageType.SETTLEMENT, abi.encode(_settlementMessages));
  }

  /**
   * @dev Formats a var update message
   * @param _data The data (encoded variable)
   * @return _message The formatted var update message
   */
  function formatVarUpdateMessage(
    bytes memory _data
  ) internal pure returns (bytes memory _message) {
    _message = formatMessage(MessageType.VAR_UPDATE, _data);
  }

  /**
   * @dev Formats an address updating message (Mailbox, SecurityModule, Gateway)
   * @param _updateVariable the name of the variable being updated
   * @param _address The new address
   * @return _message The formatted address update message
   */
  function formatAddressUpdateMessage(
    bytes32 _updateVariable,
    bytes32 _address
  ) internal pure returns (bytes memory _message) {
    _message = formatVarUpdateMessage(abi.encode(_updateVariable, abi.encode(_address)));
  }

  /**
   * @dev Formats a uint updating message (MaxRoutersFee)
   * @param _updateVariable the hashed name of the variable being updated
   * @param _value The new value
   * @return _message The formatted uint update message
   */
  function formatUintUpdateMessage(
    bytes32 _updateVariable,
    uint256 _value
  ) internal pure returns (bytes memory _message) {
    _message = formatVarUpdateMessage(abi.encode(_updateVariable, abi.encode(_value)));
  }

  /*//////////////////////////////////////////////////////////////
                          MESSAGE PARSING
  //////////////////////////////////////////////////////////////*/

  /**
   * @dev Parses an intent message
   * @param _data The intent message data
   * @return _intents Array of decoded intents
   */
  function parseIntentMessageBatch(
    bytes memory _data
  ) internal pure returns (IEverclear.Intent[] memory _intents) {
    (_intents) = abi.decode(_data, (IEverclear.Intent[]));
  }

  /**
   * @dev Parses a fill message
   * @param _data The packed fill message data
   * @return _fillMessages Array of fill messages
   */
  function parseFillMessageBatch(
    bytes memory _data
  ) internal pure returns (IEverclear.FillMessage[] memory _fillMessages) {
    (_fillMessages) = abi.decode(_data, (IEverclear.FillMessage[]));
  }

  /**
   * @dev Parses a settlement message
   * @param _data The packed settlement message data
   * @return _settlementMessages Array of settlement messages
   */
  function parseSettlementBatch(
    bytes memory _data
  ) internal pure returns (IEverclear.Settlement[] memory _settlementMessages) {
    (_settlementMessages) = abi.decode(_data, (IEverclear.Settlement[]));
  }

  /**
   * @dev Parses a var update message
   * @param _data The abi encoded variable
   * @return _updateVariable The hashed name of the variable being updated
   * @return _varData The encoded variable data
   */
  function parseVarUpdateMessage(
    bytes memory _data
  ) internal pure returns (bytes32 _updateVariable, bytes memory _varData) {
    (_updateVariable, _varData) = abi.decode(_data, (bytes32, bytes));
  }

  /**
   * @dev Parses an address update message
   * @param _data The abi encoded address
   * @return _address The decoded address
   */
  function parseAddressUpdateMessage(
    bytes memory _data
  ) internal pure returns (bytes32 _address) {
    _address = abi.decode(_data, (bytes32));
  }

  /**
   * @dev Parses a uint update message
   * @param _data The abi encoded uint
   * @return _value The decoded uint
   */
  function parseUintUpdateMessage(
    bytes memory _data
  ) internal pure returns (uint256 _value) {
    _value = abi.decode(_data, (uint256));
  }
}

// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity 0.8.23;

/**
 * @title TypeCasts
 * @notice Library for type casts
 */
library TypeCasts {
  // alignment preserving cast
  /**
   * @notice Cast an address to a bytes32
   * @param _addr The address to cast
   */
  function toBytes32(
    address _addr
  ) internal pure returns (bytes32) {
    return bytes32(uint256(uint160(_addr)));
  }

  // alignment preserving cast
  /**
   * @notice Cast a bytes32 to an address
   * @param _buf The bytes32 to cast
   */
  function toAddress(
    bytes32 _buf
  ) internal pure returns (address) {
    return address(uint160(uint256(_buf)));
  }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.23;

/**
 * @title IMessageReceiver
 * @notice Interface for the transport layer communication with the message receiver
 */
interface IMessageReceiver {
  /*///////////////////////////////////////////////////////////////
                              LOGIC
  //////////////////////////////////////////////////////////////*/

  /**
   * @notice Receive a message from the transport layer
   * @param _message The message to receive encoded as bytes
   * @dev This function should be called by the the gateway contract
   */
  function receiveMessage(
    bytes calldata _message
  ) external;
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.23;

/**
 * @title ISettlementModule
 * @notice Interface for the base settlement module
 */
interface ISettlementModule {
  /*///////////////////////////////////////////////////////////////
                              LOGIC
  //////////////////////////////////////////////////////////////*/

  /**
   * @notice Handle a mint action for a specific strategy
   * @param _asset The address of the asset to mint
   * @param _recipient The recipient of the minted assets
   * @param _fallbackRecipient The fallback recipient of the minted assets (in case of failure)
   * @param _amount The amount to mint
   * @param _data Extra data needed by some modules
   * @return _success The outcome of the minting strategy
   * @dev In case of failure, the parent module will handle the operation accordingly
   */
  function handleMintStrategy(
    address _asset,
    address _recipient,
    address _fallbackRecipient,
    uint256 _amount,
    bytes calldata _data
  ) external returns (bool _success);

  /**
   * @notice Handle a burn action for a specific strategy
   * @param _asset The address of the asset to burn
   * @param _user The user whose assets are being burned
   * @param _amount The amount to burn
   * @param _data Extra data needed by some modules
   * @dev In case of failure, the `newIntent` flow will revert
   */
  function handleBurnStrategy(address _asset, address _user, uint256 _amount, bytes calldata _data) external;
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.23;

import {IGateway} from 'interfaces/common/IGateway.sol';

/**
 * @title ISpokeGateway
 * @notice Interface for the SpokeGateway contract, sends and receives messages to and from the transport layer
 */
interface ISpokeGateway is IGateway {
  /*///////////////////////////////////////////////////////////////
                              LOGIC
  //////////////////////////////////////////////////////////////*/

  /**
   * @notice Initialize Gateway variables
   * @param _owner The address of the owner
   * @param _mailbox The address of the local mailbox
   * @param _receiver The address of the local message receiver (EverclearSpoke)
   * @param _interchainSecurityModule The address of the chosen interchain security module
   * @param _everclearId The id of the Everclear domain
   * @param _hubGateway The bytes32 representation of the Hub gateway
   * @dev Only called once on initialization
   */
  function initialize(
    address _owner,
    address _mailbox,
    address _receiver,
    address _interchainSecurityModule,
    uint32 _everclearId,
    bytes32 _hubGateway
  ) external;

  /*///////////////////////////////////////////////////////////////
                              VIEWS
  //////////////////////////////////////////////////////////////*/

  /**
   * @notice Returns the Everclear hub chain id
   * @return _hubChainId The Everclear chain id
   */
  function EVERCLEAR_ID() external view returns (uint32 _hubChainId);

  /**
   * @notice Returns the `HubGateway` gateway address
   * @return _hubGateway The `HubGateway` address
   */
  function EVERCLEAR_GATEWAY() external view returns (bytes32 _hubGateway);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.23;

import {QueueLib} from 'contracts/common/QueueLib.sol';

import {IPermit2} from 'interfaces/common/IPermit2.sol';

import {ISettlementModule} from 'interfaces/common/ISettlementModule.sol';
import {ICallExecutor} from 'interfaces/intent/ICallExecutor.sol';
import {ISpokeGateway} from 'interfaces/intent/ISpokeGateway.sol';
import {ISpokeStorage} from 'interfaces/intent/ISpokeStorage.sol';

/**
 * @title SpokeStorage
 * @notice Storage layout and modifiers for the `EverclearSpoke`
 */
abstract contract SpokeStorage is ISpokeStorage {
  /// @inheritdoc ISpokeStorage
  bytes32 public constant FILL_INTENT_FOR_SOLVER_TYPEHASH = keccak256(
    'function fillIntentForSolver(address _solver, Intent calldata _intent, uint256 _nonce, uint24 _fee, bytes memory _signature)'
  );

  /// @inheritdoc ISpokeStorage
  bytes32 public constant PROCESS_INTENT_QUEUE_VIA_RELAYER_TYPEHASH = keccak256(
    'function processIntentQueueViaRelayer(uint32 _domain, Intent[] memory _intents, address _relayer, uint256 _ttl, uint256 _nonce, uint256 _bufferDBPS, bytes memory _signature)'
  );

  /// @inheritdoc ISpokeStorage
  bytes32 public constant PROCESS_FILL_QUEUE_VIA_RELAYER_TYPEHASH = keccak256(
    'function processFillQueueViaRelayer(uint32 _domain, uint32 _amount, address _relayer, uint256 _ttl, uint256 _nonce, uint256 _bufferDBPS, bytes memory _signature)'
  );

  /// @inheritdoc ISpokeStorage
  IPermit2 public constant PERMIT2 = IPermit2(0x000000000022D473030F116dDEE9F6B43aC78BA3);

  /// @inheritdoc ISpokeStorage
  uint32 public EVERCLEAR;

  /// @inheritdoc ISpokeStorage
  uint32 public DOMAIN;

  /// @inheritdoc ISpokeStorage
  address public lighthouse;

  /// @inheritdoc ISpokeStorage
  address public watchtower;

  /// @inheritdoc ISpokeStorage
  address public messageReceiver;

  /// @inheritdoc ISpokeStorage
  ISpokeGateway public gateway;

  /// @inheritdoc ISpokeStorage
  ICallExecutor public callExecutor;

  /// @inheritdoc ISpokeStorage
  bool public paused;

  /// @inheritdoc ISpokeStorage
  uint64 public nonce;

  /// @inheritdoc ISpokeStorage
  uint256 public messageGasLimit;

  /// @inheritdoc ISpokeStorage
  mapping(bytes32 _asset => mapping(bytes32 _user => uint256 _amount)) public balances;

  /// @inheritdoc ISpokeStorage
  mapping(bytes32 _intentId => IntentStatus status) public status;

  /// @inheritdoc ISpokeStorage
  mapping(address _asset => Strategy _strategy) public strategies;

  /// @inheritdoc ISpokeStorage
  mapping(Strategy _strategy => ISettlementModule _module) public modules;

  /**
   * @notice The intent queue
   */
  QueueLib.IntentQueue public intentQueue;

  /**
   * @notice The fill queue
   */
  QueueLib.FillQueue public fillQueue;

  /**
   * @notice Checks that the address is valid
   */
  modifier validAddress(
    address _address
  ) {
    if (_address == address(0)) {
      revert EverclearSpoke_ZeroAddress();
    }
    _;
  }

  /**
   * @notice Checks that the local domain is included in the destinations
   * @param _intent The intent to check
   */
  modifier validDestination(
    Intent calldata _intent
  ) {
    // when it's an xcall executable, destinations.length is always 1
    if (_intent.destinations[0] != DOMAIN) {
      revert EverclearSpoke_WrongDestination();
    }
    _;
  }

  /**
   * @notice Checks when processing a queue that the amount is valid for the queue being processed
   * @param _first The first index of the queue
   * @param _last The last index of the queue
   * @param _amount The amount to process
   */
  modifier validQueueAmount(uint256 _first, uint256 _last, uint256 _amount) {
    if (_amount == 0) {
      revert EverclearSpoke_ProcessQueue_ZeroAmount();
    }

    if (_first + _amount - 1 > _last) {
      revert EverclearSpoke_ProcessQueue_InvalidAmount(_first, _last, _amount);
    }

    _;
  }

  /**
   * @notice Checks that the contract is not paused
   */
  modifier whenNotPaused() {
    if (paused) {
      revert EverclearSpoke_Paused();
    }
    _;
  }

  /**
   * @notice Checks that the caller has access to pause the contract
   */
  modifier hasPauseAccess() {
    if (msg.sender != lighthouse && msg.sender != watchtower) {
      revert EverclearSpoke_Pause_NotAuthorized();
    }
    _;
  }
}

// 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 v5.0.0) (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 reininitialization) 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 Returns a pointer to the storage namespace.
     */
    // solhint-disable-next-line var-name-mixedcase
    function _getInitializableStorage() private pure returns (InitializableStorage storage $) {
        assembly {
            $.slot := INITIALIZABLE_STORAGE
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
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 v5.0.0) (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.20;

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

/**
 * @dev Interface for the optional metadata functions from the ERC20 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 v5.0.1) (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 v5.0.0) (interfaces/draft-IERC6093.sol)
pragma solidity ^0.8.20;

/**
 * @dev Standard ERC20 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC20 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 ERC721 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC721 tokens.
 */
interface IERC721Errors {
    /**
     * @dev Indicates that an address can't be an owner. For example, `address(0)` is a forbidden owner in EIP-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 ERC1155 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC1155 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
pragma solidity 0.8.23;

/**
 * @title IEverclear
 * @notice Common interface for EverclearHub and EverclearSpoke
 */
interface IEverclear {
  /*//////////////////////////////////////////////////////////////
                                ENUMS
    //////////////////////////////////////////////////////////////*/
  /**
   * @notice Enum representing statuses of an intent
   */
  enum IntentStatus {
    NONE, // 0
    ADDED, // 1
    DEPOSIT_PROCESSED, // 2
    FILLED, // 3
    ADDED_AND_FILLED, // 4
    INVOICED, // 5
    SETTLED, // 6
    SETTLED_AND_MANUALLY_EXECUTED, // 7
    UNSUPPORTED, // 8
    UNSUPPORTED_RETURNED // 9

  }

  /**
   * @notice Enum representing asset strategies
   */
  enum Strategy {
    DEFAULT,
    XERC20
  }

  /*///////////////////////////////////////////////////////////////
                            STRUCTS
  //////////////////////////////////////////////////////////////*/

  /**
   * @notice The structure of an intent
   * @param initiator The address of the intent initiator
   * @param receiver The address of the intent receiver
   * @param inputAsset The address of the intent asset on origin
   * @param outputAsset The address of the intent asset on destination
   * @param maxFee The maximum fee that can be taken by solvers
   * @param origin The origin chain of the intent
   * @param destinations The possible destination chains of the intent
   * @param nonce The nonce of the intent
   * @param timestamp The timestamp of the intent
   * @param ttl The time to live of the intent
   * @param amount The amount of the intent asset normalized to 18 decimals
   * @param data The data of the intent
   */
  struct Intent {
    bytes32 initiator;
    bytes32 receiver;
    bytes32 inputAsset;
    bytes32 outputAsset;
    uint24 maxFee;
    uint32 origin;
    uint64 nonce;
    uint48 timestamp;
    uint48 ttl;
    uint256 amount;
    uint32[] destinations;
    bytes data;
  }

  /**
   * @notice The structure of a fill message
   * @param intentId The ID of the intent
   * @param solver The address of the intent solver in bytes32 format
   * @param initiator The address of the intent initiator
   * @param fee The total fee of the expressed in dbps, represents the solver fee plus the sum of protocol fees for the token
   * @param executionTimestamp The execution timestamp of the intent
   */
  struct FillMessage {
    bytes32 intentId;
    bytes32 solver;
    bytes32 initiator;
    uint24 fee;
    uint48 executionTimestamp;
  }

  /**
   * @notice The structure of a settlement
   * @param intentId The ID of the intent
   * @param amount The amount of the asset
   * @param asset The address of the asset
   * @param recipient The address of the recipient
   * @param updateVirtualBalance If set to true, the settlement will not be transferred to the recipient in spoke domain and the virtual balance will be increased
   */
  struct Settlement {
    bytes32 intentId;
    uint256 amount;
    bytes32 asset;
    bytes32 recipient;
    bool updateVirtualBalance;
  }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

import {IMailbox} from '@hyperlane/interfaces/IMailbox.sol';

import {IMessageReceiver} from 'interfaces/common/IMessageReceiver.sol';

interface IGateway {
  /*///////////////////////////////////////////////////////////////
                              EVENTS
  //////////////////////////////////////////////////////////////*/

  /**
   * @notice Emitted when the mailbox is updated
   * @param _oldMailbox The old mailbox address
   * @param _newMailbox The new mailbox address
   */
  event MailboxUpdated(address _oldMailbox, address _newMailbox);

  /**
   * @notice Emitted when the security module is updated
   * @param _oldSecurityModule The old security module address
   * @param _newSecurityModule The new security module address
   */
  event SecurityModuleUpdated(address _oldSecurityModule, address _newSecurityModule);

  /*///////////////////////////////////////////////////////////////
                              ERRORS
  //////////////////////////////////////////////////////////////*/

  /**
   * @notice Thrown when the message origin is invalid
   */
  error Gateway_Handle_InvalidOriginDomain();

  /**
   * @notice Thrown when the sender is not the appropriate remote Gateway
   */
  error Gateway_Handle_InvalidSender();

  /**
   * @notice Thrown when the caller is not the local mailbox
   */
  error Gateway_Handle_NotCalledByMailbox();

  /**
   * @notice Thrown when the GasTank does not have enough native asset to cover the fee
   */
  error Gateway_SendMessage_InsufficientBalance();

  /**
   * @notice Thrown when the message dispatcher is not the local receiver
   */
  error Gateway_SendMessage_UnauthorizedCaller();

  /**
   * @notice Thrown when the call returning the unused fee fails
   */
  error Gateway_SendMessage_UnsuccessfulRebate();

  /**
   * @notice Thrown when an address equals the address zero
   */
  error Gateway_ZeroAddress();

  /*///////////////////////////////////////////////////////////////
                              LOGIC
  //////////////////////////////////////////////////////////////*/

  /**
   * @notice Send a message to the transport layer using the gas tank
   * @param _chainId The id of the destination chain
   * @param _message The message to send
   * @param _fee The fee to send the message
   * @param _gasLimit The gas limit to use on destination
   * @return _messageId The id message of the transport layer
   * @return _feeSpent The fee spent to send the message
   * @dev only called by the spoke contract
   */
  function sendMessage(
    uint32 _chainId,
    bytes memory _message,
    uint256 _fee,
    uint256 _gasLimit
  ) external returns (bytes32 _messageId, uint256 _feeSpent);

  /**
   * @notice Send a message to the transport layer
   * @param _chainId The id of the destination chain
   * @param _message The message to send
   * @param _gasLimit The gas limit to use on destination
   * @return _messageId The id message of the transport layer
   * @return _feeSpent The fee spent to send the message
   * @dev only called by the spoke contract
   */
  function sendMessage(
    uint32 _chainId,
    bytes memory _message,
    uint256 _gasLimit
  ) external payable returns (bytes32 _messageId, uint256 _feeSpent);

  /**
   * @notice Updates the mailbox
   * @param _mailbox The new mailbox address
   * @dev only called by the `receiver`
   */
  function updateMailbox(
    address _mailbox
  ) external;

  /**
   * @notice Updates the gateway security module
   * @param _securityModule The address of the new security module
   * @dev only called by the `receiver`
   */
  function updateSecurityModule(
    address _securityModule
  ) external;

  /*///////////////////////////////////////////////////////////////
                              VIEWS
  //////////////////////////////////////////////////////////////*/

  /**
   * @notice Returns the transport layer message routing smart contract
   * @dev this is independent of the transport layer used, adopting mailbox name because its descriptive enough
   *      using address instead of specific interface to be independent from HL or any other TL
   * @return _mailbox The mailbox contract
   */
  function mailbox() external view returns (IMailbox _mailbox);

  /**
   * @notice Returns the message receiver for this Gateway (EverclearHub / EverclearSpoke)
   * @return _receiver The message receiver
   */
  function receiver() external view returns (IMessageReceiver _receiver);

  /**
   * @notice Quotes cost of sending a message to the transport layer
   * @param _chainId The id of the destination chain
   * @param _message The message to send
   * @param _gasLimit The gas limit for delivering the message
   * @return _fee The fee to send the message
   */
  function quoteMessage(uint32 _chainId, bytes memory _message, uint256 _gasLimit) external view returns (uint256 _fee);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.23;

import {IEverclear} from 'interfaces/common/IEverclear.sol';

/**
 * @title QueueLib
 * @notice Library for managing queues
 */
library QueueLib {
  /**
   * @notice Structure for the IntentQueue
   * @dev first should always be initialized to 1
   * @param first The first position in the queue
   * @param last The last position in the queue
   * @param queue The queue of intent ids
   */
  struct IntentQueue {
    uint256 first;
    uint256 last;
    mapping(uint256 _position => bytes32 _intentId) queue;
  }

  /**
   * @notice Structure for the FillQueue
   * @dev Member first should always be initialized to 1
   * @param first The first position in the queue
   * @param last The last position in the queue
   * @param queue The queue of fill messages
   */
  struct FillQueue {
    uint256 first;
    uint256 last;
    mapping(uint256 _position => IEverclear.FillMessage _fillMessage) queue;
  }

  /**
   * @notice Thrown when the queue is empty
   */
  error Queue_EmptyQueue();

  /**
   * @notice Enqueue an intent id to the IntentQueue
   * @param _queue The IntentQueue
   * @param _intentId The intent id to enqueue
   */
  function enqueueIntent(IntentQueue storage _queue, bytes32 _intentId) internal {
    _queue.last += 1;
    _queue.queue[_queue.last] = _intentId;
  }

  /**
   * @notice Enqueue a fill message to the FillQueue
   * @param _queue The FillQueue
   * @param _fillMessage The fill message to enqueue
   */
  function enqueueFill(FillQueue storage _queue, IEverclear.FillMessage memory _fillMessage) internal {
    _queue.last += 1;
    _queue.queue[_queue.last] = _fillMessage;
  }

  /**
   * @notice Dequeue an intent id from the IntentQueue
   * @param _queue The IntentQueue
   * @return _intentId The dequeued intent id
   */
  function dequeueIntent(
    IntentQueue storage _queue
  ) internal returns (bytes32 _intentId) {
    // non-empty queue check
    if (_queue.last < _queue.first) revert Queue_EmptyQueue();

    _intentId = _queue.queue[_queue.first];

    delete _queue.queue[_queue.first];
    _queue.first += 1;
  }

  /**
   * @notice Dequeue a fill message from the FillQueue
   * @param _queue The FillQueue
   * @return _fillMessage The dequeued fill message
   */
  function dequeueFill(
    FillQueue storage _queue
  ) internal returns (IEverclear.FillMessage memory _fillMessage) {
    // non-empty queue
    if (_queue.last < _queue.first) revert Queue_EmptyQueue();

    _fillMessage = _queue.queue[_queue.first];

    delete _queue.queue[_queue.first];
    _queue.first += 1;
  }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.23;

import {IERC20} from '@openzeppelin/contracts/token/ERC20/IERC20.sol';

/**
 * @title IPermit2
 * @notice Interface for permit2
 */
interface IPermit2 {
  /*///////////////////////////////////////////////////////////////
                                STRUCTS
  //////////////////////////////////////////////////////////////*/

  /**
   * @notice Struct for token and amount in a permit message
   * @param token The token to transfer
   * @param amount The amount to transfer
   */
  struct TokenPermissions {
    IERC20 token;
    uint256 amount;
  }

  /**
   * @notice Struct for the permit2 message
   * @param permitted The permitted token and amount
   * @param nonce The unique identifier for this permit
   * @param deadline The expiration for this permit
   */
  struct PermitTransferFrom {
    TokenPermissions permitted;
    uint256 nonce;
    uint256 deadline;
  }

  /**
   * @notice Struct for the transfer details for permitTransferFrom()
   * @param to The recipient of the tokens
   * @param requestedAmount The amount to transfer
   */
  struct SignatureTransferDetails {
    address to;
    uint256 requestedAmount;
  }

  /*///////////////////////////////////////////////////////////////
                                LOGIC
  //////////////////////////////////////////////////////////////*/

  /**
   * @notice Consume a permit2 message and transfer tokens
   * @param permit The permit message
   * @param transferDetails The transfer details
   * @param owner The owner of the tokens
   * @param signature The signature of the permit
   */
  function permitTransferFrom(
    PermitTransferFrom calldata permit,
    SignatureTransferDetails calldata transferDetails,
    address owner,
    bytes calldata signature
  ) external;
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.23;

/**
 * @title ICallExecutor
 * @notice Interface for the CallExecutor contract, executes calls to external contracts
 */
interface ICallExecutor {
  /**
   * @notice Safely call a target contract, use when you _really_ really _really_ don't trust the called
   * contract. This prevents the called contract from causing reversion of the caller in as many ways as we can.
   * @param _target The address to call
   * @param _gas The amount of gas to forward to the remote contract
   * @param _value The value in wei to send to the remote contract
   * @param _maxCopy The maximum number of bytes of returndata to copy to memory
   * @param _calldata The data to send to the remote contract
   * @return _success Whether the call was successful
   * @return _returnData Returndata as `.call()`. Returndata is capped to `_maxCopy` bytes.
   */
  function excessivelySafeCall(
    address _target,
    uint256 _gas,
    uint256 _value,
    uint16 _maxCopy,
    bytes memory _calldata
  ) external returns (bool _success, bytes memory _returnData);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.23;

import {IEverclear} from 'interfaces/common/IEverclear.sol';
import {IPermit2} from 'interfaces/common/IPermit2.sol';

import {ISettlementModule} from 'interfaces/common/ISettlementModule.sol';
import {ICallExecutor} from 'interfaces/intent/ICallExecutor.sol';
import {ISpokeGateway} from 'interfaces/intent/ISpokeGateway.sol';

/**
 * @title ISpokeStorage
 * @notice Interface for the SpokeStorage contract
 */
interface ISpokeStorage is IEverclear {
  /*///////////////////////////////////////////////////////////////
                              STRUCTS
  //////////////////////////////////////////////////////////////*/

  /**
   * @notice Parameters needed to initiliaze `EverclearSpoke`
   * @param gateway The local `SpokeGateway`
   * @param callExecutor The local `CallExecutor`
   * @param messageReceiver The address for the `SpokeMessageReceiver` module
   * @param lighthouse The address for the Lighthouse agent
   * @param watchtower The address for the Watchtower agent
   * @param hubDomain The chain id for the Everclear domain
   * @param owner The initial owner of the contract
   */
  struct SpokeInitializationParams {
    ISpokeGateway gateway;
    ICallExecutor callExecutor;
    address messageReceiver;
    address lighthouse;
    address watchtower;
    uint32 hubDomain;
    address owner;
  }

  /*///////////////////////////////////////////////////////////////
                              EVENTS
  //////////////////////////////////////////////////////////////*/

  /**
   * @notice emitted when the Gateway address is updated
   * @param _oldGateway The address of the old gateway
   * @param _newGateway The address of the new gateway
   */
  event GatewayUpdated(address _oldGateway, address _newGateway);

  /**
   * @notice emitted when the Lighthouse address is updated
   * @param _oldLightHouse The address of the old lighthouse
   * @param _newLightHouse The address of the new lighthouse
   */
  event LighthouseUpdated(address _oldLightHouse, address _newLightHouse);

  /**
   * @notice emitted when the Watchtower address is updated
   * @param _oldWatchtower The address of the old watchtower
   * @param _newWatchtower The address of the new watchtower
   */
  event WatchtowerUpdated(address _oldWatchtower, address _newWatchtower);

  /**
   * @notice emitted when the MessageReceiver address is updated
   * @param _oldMessageReceiver The address of the old message receiver
   * @param _newMessageReceiver The address of the new message receiver
   */
  event MessageReceiverUpdated(address _oldMessageReceiver, address _newMessageReceiver);

  /**
   * @notice emitted when messageGasLimit is updated
   * @param _oldGasLimit The old gas limit
   * @param _newGasLimit The new gas limit
   */
  event MessageGasLimitUpdated(uint256 _oldGasLimit, uint256 _newGasLimit);

  /**
   * @notice emitted when the protocol is paused (domain-level)
   */
  event Paused();

  /**
   * @notice emitted when the protocol is paused (domain-level)
   */
  event Unpaused();

  /**
   * @notice emitted when a strategy is set for an asset
   * @param _asset The address of the asset being configured
   * @param _strategy The id for the strategy (see `enum Strategy`)
   */
  event StrategySetForAsset(address _asset, IEverclear.Strategy _strategy);

  /**
   * @notice emitted when the module is set for a strategy
   * @param _strategy The id for the strategy (see `enum Strategy`)
   * @param _module The settlement module
   */
  event ModuleSetForStrategy(IEverclear.Strategy _strategy, ISettlementModule _module);

  /**
   * @notice emitted when the EverclearSpoke processes a settlement
   * @param _intentId The ID of the intent
   * @param _account The address of the account
   * @param _asset The address of the asset
   * @param _amount The amount of the asset
   */
  event Settled(bytes32 indexed _intentId, address _account, address _asset, uint256 _amount);

  /**
   * @notice emitted when `_handleSettlement` fails to transfer tokens to a user (eg. blacklisted recipient)
   * @param _asset The address of the asset
   * @param _recipient The address of the recipient
   * @param _amount The amount of the asset
   */
  event AssetTransferFailed(address indexed _asset, address indexed _recipient, uint256 _amount);

  /**
   * @notice emitted when `_handleSettlement` fails to mint the non-default stategy asset
   * @param _asset The address of the asset
   * @param _recipient The address of the recipient
   * @param _amount The amount of the asset
   * @param _strategy The strategy used for the asset
   */
  event AssetMintFailed(address indexed _asset, address indexed _recipient, uint256 _amount, Strategy _strategy);

  /*///////////////////////////////////////////////////////////////
                              ERRORS
  //////////////////////////////////////////////////////////////*/

  /**
   * @notice Thrown when the spoke is receiving a message from an address that is not the authorized gateway, admin or owner
   */
  error EverclearSpoke_Unauthorized();

  /**
   * @notice Thrown when a message is not a valid message type
   */
  error EverclearSpoke_InvalidMessageType();

  /**
   * @notice Thrown when the destination is wrong
   */
  error EverclearSpoke_WrongDestination();

  /**
   * @notice Thrown when a variable update is invalid
   */
  error EverclearSpoke_InvalidVarUpdate();

  /**
   * @notice Thrown when calling to a processQueue method with a zero amount
   */
  error EverclearSpoke_ProcessQueue_ZeroAmount();

  /**
   * @notice Thrown when calling to a processQueue method with an invalid amount
   * @param _first The index of the first element of the queue
   * @param _last The index of the last element of the queue
   * @param _amount The amount of items being tried to process
   */
  error EverclearSpoke_ProcessQueue_InvalidAmount(uint256 _first, uint256 _last, uint256 _amount);

  /**
   * @notice Thrown when calling a function with the zero address
   */
  error EverclearSpoke_ZeroAddress();

  /**
   * @notice Thrown when a function is called when the spoke is paused
   */
  error EverclearSpoke_Paused();

  /**
   * @notice Thrown when the caller is not authorized to pause the spoke
   */
  error EverclearSpoke_Pause_NotAuthorized();

  /*///////////////////////////////////////////////////////////////
                              VIEWS
  //////////////////////////////////////////////////////////////*/

  /**
   * @notice returns the typehash for `fillIntentForSolver`
   * @return _typeHash The `fillIntentForSolver` type hash
   */
  function FILL_INTENT_FOR_SOLVER_TYPEHASH() external view returns (bytes32 _typeHash);

  /**
   * @notice returns the typehash for `processIntentQueueViaRelayer`
   * @return _typeHash The `processIntentQueueViaRelayer` type hash
   */
  function PROCESS_INTENT_QUEUE_VIA_RELAYER_TYPEHASH() external view returns (bytes32 _typeHash);

  /**
   * @notice returns the typehash for `processFillQueueViaRelayer`
   * @return _typeHash The `processFillQueueViaRelayer` type hash
   */
  function PROCESS_FILL_QUEUE_VIA_RELAYER_TYPEHASH() external view returns (bytes32 _typeHash);

  /**
   * @notice returns the permit2 contract
   * @return _permit2 The Permit2 singleton address
   */
  function PERMIT2() external view returns (IPermit2 _permit2);

  /**
   * @notice returns the domain id for the Everclear rollup
   * @return _domain The id of the Everclear domain
   */
  function EVERCLEAR() external view returns (uint32 _domain);

  /**
   * @notice returns the current domain
   * @return _domain The id of the current domain
   */
  function DOMAIN() external view returns (uint32 _domain);

  /**
   * @notice returns the lighthouse address
   * @return _lighthouse The address of the Lighthouse agent
   */
  function lighthouse() external view returns (address _lighthouse);

  /**
   * @notice returns the watchtower address
   * @return _watchtower The address of the Watchtower agent
   */
  function watchtower() external view returns (address _watchtower);

  /**
   * @notice returns the message receiver address
   * @return _messageReceiver The address of the `SpokeMessageReceiver`
   */
  function messageReceiver() external view returns (address _messageReceiver);

  /**
   * @notice returns the gateway
   * @return _gateway The local `SpokeGateway`
   */
  function gateway() external view returns (ISpokeGateway _gateway);

  /**
   * @notice returns the call executor
   * @return _callExecutor The local `CallExecutor`
   */
  function callExecutor() external view returns (ICallExecutor _callExecutor);

  /**
   * @notice returns the paused status of the spoke
   * @return _paused The boolean indicating if the contract is paused
   */
  function paused() external view returns (bool _paused);

  /**
   * @notice returns the current intent nonce
   * @return _nonce The current nonce
   */
  function nonce() external view returns (uint64 _nonce);

  /**
   * @notice returns the gas limit used for outgoing messages
   * @return _messageGasLimit the max gas limit
   */
  function messageGasLimit() external view returns (uint256 _messageGasLimit);

  /**
   * @notice returns the balance of an asset for a user
   * @param _asset The address of the asset
   * @param _user The address of the user
   * @return _amount The amount of assets locked in the contract
   */
  function balances(bytes32 _asset, bytes32 _user) external view returns (uint256 _amount);

  /**
   * @notice returns the status of an intent
   * @param _intentId The ID of the intent
   * @return _status The status of the intent
   */
  function status(
    bytes32 _intentId
  ) external view returns (IntentStatus _status);

  /**
   * @notice returns the configured strategy id for an asset
   * @param _asset The address of the asset
   * @return _strategy The strategy for the asset
   */
  function strategies(
    address _asset
  ) external view returns (IEverclear.Strategy _strategy);

  /**
   * @notice returns the module address for a strategy
   * @param _strategy The strategy id
   * @return _module The strategy module
   */
  function modules(
    IEverclear.Strategy _strategy
  ) external view returns (ISettlementModule _module);
}

// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity >=0.8.0;

import {IInterchainSecurityModule} from "./IInterchainSecurityModule.sol";
import {IPostDispatchHook} from "./hooks/IPostDispatchHook.sol";

interface IMailbox {
    // ============ Events ============
    /**
     * @notice Emitted when a new message is dispatched via Hyperlane
     * @param sender The address that dispatched the message
     * @param destination The destination domain of the message
     * @param recipient The message recipient address on `destination`
     * @param message Raw bytes of message
     */
    event Dispatch(
        address indexed sender,
        uint32 indexed destination,
        bytes32 indexed recipient,
        bytes message
    );

    /**
     * @notice Emitted when a new message is dispatched via Hyperlane
     * @param messageId The unique message identifier
     */
    event DispatchId(bytes32 indexed messageId);

    /**
     * @notice Emitted when a Hyperlane message is processed
     * @param messageId The unique message identifier
     */
    event ProcessId(bytes32 indexed messageId);

    /**
     * @notice Emitted when a Hyperlane message is delivered
     * @param origin The origin domain of the message
     * @param sender The message sender address on `origin`
     * @param recipient The address that handled the message
     */
    event Process(
        uint32 indexed origin,
        bytes32 indexed sender,
        address indexed recipient
    );

    function localDomain() external view returns (uint32);

    function delivered(bytes32 messageId) external view returns (bool);

    function defaultIsm() external view returns (IInterchainSecurityModule);

    function defaultHook() external view returns (IPostDispatchHook);

    function requiredHook() external view returns (IPostDispatchHook);

    function latestDispatchedId() external view returns (bytes32);

    function dispatch(
        uint32 destinationDomain,
        bytes32 recipientAddress,
        bytes calldata messageBody
    ) external payable returns (bytes32 messageId);

    function quoteDispatch(
        uint32 destinationDomain,
        bytes32 recipientAddress,
        bytes calldata messageBody
    ) external view returns (uint256 fee);

    function dispatch(
        uint32 destinationDomain,
        bytes32 recipientAddress,
        bytes calldata body,
        bytes calldata defaultHookMetadata
    ) external payable returns (bytes32 messageId);

    function quoteDispatch(
        uint32 destinationDomain,
        bytes32 recipientAddress,
        bytes calldata messageBody,
        bytes calldata defaultHookMetadata
    ) external view returns (uint256 fee);

    function dispatch(
        uint32 destinationDomain,
        bytes32 recipientAddress,
        bytes calldata body,
        bytes calldata customHookMetadata,
        IPostDispatchHook customHook
    ) external payable returns (bytes32 messageId);

    function quoteDispatch(
        uint32 destinationDomain,
        bytes32 recipientAddress,
        bytes calldata messageBody,
        bytes calldata customHookMetadata,
        IPostDispatchHook customHook
    ) external view returns (uint256 fee);

    function process(
        bytes calldata metadata,
        bytes calldata message
    ) external payable;

    function recipientIsm(
        address recipient
    ) external view returns (IInterchainSecurityModule module);
}

// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity >=0.6.11;

interface IInterchainSecurityModule {
    enum Types {
        UNUSED,
        ROUTING,
        AGGREGATION,
        LEGACY_MULTISIG,
        MERKLE_ROOT_MULTISIG,
        MESSAGE_ID_MULTISIG,
        NULL, // used with relayer carrying no metadata
        CCIP_READ
    }

    /**
     * @notice Returns an enum that represents the type of security model
     * encoded by this ISM.
     * @dev Relayers infer how to fetch and format metadata.
     */
    function moduleType() external view returns (uint8);

    /**
     * @notice Defines a security model responsible for verifying interchain
     * messages based on the provided metadata.
     * @param _metadata Off-chain metadata provided by a relayer, specific to
     * the security model encoded by the module (e.g. validator signatures)
     * @param _message Hyperlane encoded interchain message
     * @return True if the message was verified
     */
    function verify(
        bytes calldata _metadata,
        bytes calldata _message
    ) external returns (bool);
}

interface ISpecifiesInterchainSecurityModule {
    function interchainSecurityModule()
        external
        view
        returns (IInterchainSecurityModule);
}

// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity >=0.8.0;

/*@@@@@@@       @@@@@@@@@
 @@@@@@@@@       @@@@@@@@@
  @@@@@@@@@       @@@@@@@@@
   @@@@@@@@@       @@@@@@@@@
    @@@@@@@@@@@@@@@@@@@@@@@@@
     @@@@@  HYPERLANE  @@@@@@@
    @@@@@@@@@@@@@@@@@@@@@@@@@
   @@@@@@@@@       @@@@@@@@@
  @@@@@@@@@       @@@@@@@@@
 @@@@@@@@@       @@@@@@@@@
@@@@@@@@@       @@@@@@@@*/

interface IPostDispatchHook {
    enum Types {
        UNUSED,
        ROUTING,
        AGGREGATION,
        MERKLE_TREE,
        INTERCHAIN_GAS_PAYMASTER,
        FALLBACK_ROUTING,
        ID_AUTH_ISM,
        PAUSABLE,
        PROTOCOL_FEE,
        LAYER_ZERO_V1
    }

    /**
     * @notice Returns an enum that represents the type of hook
     */
    function hookType() external view returns (uint8);

    /**
     * @notice Returns whether the hook supports metadata
     * @param metadata metadata
     * @return Whether the hook supports metadata
     */
    function supportsMetadata(
        bytes calldata metadata
    ) external view returns (bool);

    /**
     * @notice Post action after a message is dispatched via the Mailbox
     * @param metadata The metadata required for the hook
     * @param message The message passed from the Mailbox.dispatch() call
     */
    function postDispatch(
        bytes calldata metadata,
        bytes calldata message
    ) external payable;

    /**
     * @notice Compute the payment required by the postDispatch call
     * @param metadata The metadata required for the hook
     * @param message The message passed from the Mailbox.dispatch() call
     * @return Quoted payment for the postDispatch call
     */
    function quoteDispatch(
        bytes calldata metadata,
        bytes calldata message
    ) external view returns (uint256);
}

{
  "remappings": [
    "ds-test/=../../node_modules/ds-test/src/",
    "forge-std/=../../node_modules/forge-std/src/",
    "isolmate/=../../node_modules/isolmate/src/",
    "@hyperlane/=../../node_modules/@hyperlane-xyz/core/contracts/",
    "@openzeppelin/=../../node_modules/@openzeppelin/",
    "@upgrades/=lib/openzeppelin-foundry-upgrades/src/",
    "xerc20/=lib/xerc20/solidity/contracts/",
    "contracts/=src/contracts/",
    "interfaces/=src/interfaces/",
    "utils/=script/utils/",
    "@eth-optimism/=../../node_modules/@eth-optimism/",
    "@hyperlane-xyz/=../../node_modules/@hyperlane-xyz/",
    "@layerzerolabs/=../../node_modules/@layerzerolabs/",
    "erc4626-tests/=lib/xerc20/lib/openzeppelin-contracts/lib/erc4626-tests/",
    "forge-gas-snapshot/=lib/xerc20/lib/permit2/lib/forge-gas-snapshot/src/",
    "fx-portal/=../../node_modules/fx-portal/",
    "openzeppelin-contracts/=lib/xerc20/lib/openzeppelin-contracts/",
    "openzeppelin-foundry-upgrades/=lib/openzeppelin-foundry-upgrades/src/",
    "openzeppelin/=lib/xerc20/lib/openzeppelin-contracts/contracts/",
    "permit2/=lib/xerc20/lib/permit2/",
    "prb-test/=lib/xerc20/lib/prb-test/src/",
    "prb/test/=lib/xerc20/lib/prb-test/src/",
    "solidity-stringutils/=lib/openzeppelin-foundry-upgrades/lib/solidity-stringutils/",
    "solmate/=lib/xerc20/lib/permit2/lib/solmate/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 10000
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "shanghai",
  "viaIR": false,
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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ICallExecutor","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"fillQueue","outputs":[{"internalType":"uint256","name":"first","type":"uint256"},{"internalType":"uint256","name":"last","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"gateway","outputs":[{"internalType":"contract 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IEverclear.IntentStatus","name":"status","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_asset","type":"address"}],"name":"strategies","outputs":[{"internalType":"enum IEverclear.Strategy","name":"_strategy","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"watchtower","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"}]

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