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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "./interfaces/ICollectionRegistry.sol";

/// @title CollectionRegistry
/// @notice Manages whitelisted NFT collections and their base stats
contract CollectionRegistry is ICollectionRegistry, Ownable {
    // Mapping from collection address to its stats
    mapping(address => CollectionStats) private collectionStats;
    
    // Array to keep track of all whitelisted collections
    address[] private whitelistedCollections;

    // Minimum and maximum stat values
    uint256 private constant MIN_STAT_VALUE = 50;
    uint256 private constant MAX_STAT_VALUE = 200;

    constructor() Ownable() {}

    /// @notice Whitelist a new NFT collection with base stats
    /// @param collection Address of the NFT collection
    /// @param baseHp Initial HP for NFTs from this collection
    /// @param baseAttack Initial Attack for NFTs from this collection
    /// @param baseSpeed Initial Speed for NFTs from this collection
    function whitelistCollection(
        address collection,
        uint256 baseHp,
        uint256 baseAttack,
        uint256 baseSpeed
    ) external onlyOwner {
        // Verify collection is a valid ERC721 contract
        require(collection != address(0), "Invalid collection address");
        require(!collectionStats[collection].isWhitelisted, "Collection already whitelisted");
        _validateERC721(collection);
        
        // Validate stat values
        require(_isValidStatValue(baseHp), "Invalid HP value");
        require(_isValidStatValue(baseAttack), "Invalid Attack value");
        require(_isValidStatValue(baseSpeed), "Invalid Speed value");

        // Store collection stats
        collectionStats[collection] = CollectionStats({
            baseHp: baseHp,
            baseAttack: baseAttack,
            baseSpeed: baseSpeed,
            isWhitelisted: true
        });

        whitelistedCollections.push(collection);

        emit CollectionWhitelisted(collection, baseHp, baseAttack, baseSpeed);
    }

    /// @notice Update base stats for a whitelisted collection
    /// @param collection Address of the NFT collection
    /// @param baseHp New base HP
    /// @param baseAttack New base Attack
    /// @param baseSpeed New base Speed
    function updateCollectionStats(
        address collection,
        uint256 baseHp,
        uint256 baseAttack,
        uint256 baseSpeed
    ) external onlyOwner {
        require(collectionStats[collection].isWhitelisted, "Collection not whitelisted");
        
        // Validate stat values
        require(_isValidStatValue(baseHp), "Invalid HP value");
        require(_isValidStatValue(baseAttack), "Invalid Attack value");
        require(_isValidStatValue(baseSpeed), "Invalid Speed value");

        collectionStats[collection].baseHp = baseHp;
        collectionStats[collection].baseAttack = baseAttack;
        collectionStats[collection].baseSpeed = baseSpeed;

        emit CollectionStatsUpdated(collection, baseHp, baseAttack, baseSpeed);
    }

    /// @notice Remove a collection from the whitelist
    /// @param collection Address of the NFT collection to remove
    function removeCollection(address collection) external onlyOwner {
        require(collectionStats[collection].isWhitelisted, "Collection not whitelisted");

        // Remove from whitelist
        collectionStats[collection].isWhitelisted = false;

        // Remove from whitelisted collections array
        for (uint256 i = 0; i < whitelistedCollections.length; i++) {
            if (whitelistedCollections[i] == collection) {
                whitelistedCollections[i] = whitelistedCollections[whitelistedCollections.length - 1];
                whitelistedCollections.pop();
                break;
            }
        }

        emit CollectionRemoved(collection);
    }

    /// @notice Check if a collection is whitelisted
    /// @param collection Address of the NFT collection to check
    /// @return bool True if collection is whitelisted
    function isWhitelisted(address collection) external view returns (bool) {
        return collectionStats[collection].isWhitelisted;
    }

    /// @notice Get base stats for a collection
    /// @param collection Address of the NFT collection
    /// @return CollectionStats struct containing base stats
    function getCollectionStats(address collection) external view returns (CollectionStats memory) {
        return collectionStats[collection];
    }

    /// @notice Get all whitelisted collections
    /// @return address[] Array of whitelisted collection addresses
    function getWhitelistedCollections() external view returns (address[] memory) {
        return whitelistedCollections;
    }

    /// @notice Validate that an address is an ERC721 contract
    /// @param collection Address to validate
    function _validateERC721(address collection) internal view {
        require(collection.code.length > 0, "Collection must be a contract");
        try IERC721(collection).supportsInterface(0x80ac58cd) returns (bool isERC721) {
            require(isERC721, "Collection must support ERC721 interface");
        } catch {
            revert("Collection must support ERC721 interface");
        }
    }

    /// @notice Check if a stat value is within valid range
    /// @param value Stat value to check
    /// @return bool True if value is valid
    function _isValidStatValue(uint256 value) internal pure returns (bool) {
        return value >= MIN_STAT_VALUE && value <= MAX_STAT_VALUE;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

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

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

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

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

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing 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 {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;

import "../../utils/introspection/IERC165.sol";

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

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

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

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

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

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

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721
     * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must
     * understand this adds an external call which potentially creates a reentrancy vulnerability.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

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

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

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

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

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

/// @title ICollectionRegistry
/// @notice Interface for managing whitelisted NFT collections and their base stats
interface ICollectionRegistry {
    /// @notice Stats structure for NFT collections
    struct CollectionStats {
        uint256 baseHp;
        uint256 baseAttack;
        uint256 baseSpeed;
        bool isWhitelisted;
    }

    /// @notice Event emitted when a collection is whitelisted
    event CollectionWhitelisted(address indexed collection, uint256 baseHp, uint256 baseAttack, uint256 baseSpeed);
    
    /// @notice Event emitted when a collection's stats are updated
    event CollectionStatsUpdated(address indexed collection, uint256 baseHp, uint256 baseAttack, uint256 baseSpeed);
    
    /// @notice Event emitted when a collection is removed from whitelist
    event CollectionRemoved(address indexed collection);

    /// @notice Whitelist a new NFT collection with base stats
    /// @param collection Address of the NFT collection
    /// @param baseHp Initial HP for NFTs from this collection
    /// @param baseAttack Initial Attack for NFTs from this collection
    /// @param baseSpeed Initial Speed for NFTs from this collection
    function whitelistCollection(
        address collection,
        uint256 baseHp,
        uint256 baseAttack,
        uint256 baseSpeed
    ) external;

    /// @notice Update base stats for a whitelisted collection
    /// @param collection Address of the NFT collection
    /// @param baseHp New base HP
    /// @param baseAttack New base Attack
    /// @param baseSpeed New base Speed
    function updateCollectionStats(
        address collection,
        uint256 baseHp,
        uint256 baseAttack,
        uint256 baseSpeed
    ) external;

    /// @notice Remove a collection from the whitelist
    /// @param collection Address of the NFT collection to remove
    function removeCollection(address collection) external;

    /// @notice Check if a collection is whitelisted
    /// @param collection Address of the NFT collection to check
    /// @return bool True if collection is whitelisted
    function isWhitelisted(address collection) external view returns (bool);

    /// @notice Get base stats for a collection
    /// @param collection Address of the NFT collection
    /// @return CollectionStats struct containing base stats
    function getCollectionStats(address collection) external view returns (CollectionStats memory);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @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;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

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

{
  "remappings": [
    "@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/",
    "forge-std/=lib/forge-std/src/",
    "@pythnetwork/=lib/@pythnetwork/",
    "pyth-sdk-solidity/=lib/pyth-sdk-solidity/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "paris",
  "libraries": {}
}

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