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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "../interfaces/IERC6551Executable.sol";

import "../interfaces/IPackModule.sol";

/**
 * @title ERC721Module
 * @dev This contract handles the creation, opening, and revocation of ERC721 tokens in a pack.
 */
contract ERC721Module is IPackModule {
    //
    uint256 public constant CALL_OPERATION = 0; // Only call operations are supported for ERC6551
    uint256 public constant CALL_VALUE = 0; // No value is sent with the call

    /**
     * @dev Struct to hold data for tokens on creation, opening, and revocation of a pack.
     * @param tokenAddress The address of the ERC721 token.
     * @param tokenId The ID of the token to be included in the pack.
     */
    struct AdditionalData {
        address tokenAddress;
        uint256 tokenId;
    }

    // Lifecycle functions
    /**
     * @dev Function to handle token transfers on creation of a pack.
     * @param account The address of the account creating the pack.
     * @param additionalData The data for the tokens to be included in the pack.
     */
    function onCreate(
        uint256 /* tokenId */,
        address account,
        bytes calldata additionalData
    ) external payable override {
        // unpack data

        AdditionalData[] memory tokensData = abi.decode(
            additionalData,
            (AdditionalData[])
        );

        // Iterate over the array of TokenData objects
        for (uint256 i = 0; i < tokensData.length; i++) {
            IERC721(tokensData[i].tokenAddress).transferFrom(
                msg.sender,
                account,
                tokensData[i].tokenId
            );
        }

        return;
    }

    /**
     * @dev Function to handle token transfers on opening of a pack.
     * @param account The address of the account opening the pack.
     * @param claimer The address of the account claiming the pack.
     * @param additionalData The data for the tokens to be claimed from the pack.
     */
    function onOpen(
        uint256 /* tokenId */,
        address account,
        address claimer,
        bytes calldata additionalData
    ) external override {
        // unpack data
        AdditionalData[] memory tokensData = abi.decode(
            additionalData,
            (AdditionalData[])
        );

        // Iterate over the array of TokenData objects
        for (uint256 i = 0; i < tokensData.length; i++) {
            IERC6551Executable(payable(account)).execute(
                tokensData[i].tokenAddress,
                CALL_VALUE,
                abi.encodeWithSignature(
                    "safeTransferFrom(address,address,uint256)",
                    account,
                    claimer,
                    tokensData[i].tokenId
                ),
                CALL_OPERATION
            );
        }

        return;
    }

    /**
     * @dev Function to handle token transfers on revocation of a pack.
     * @param account The address of the account revoking the pack.
     * @param additionalData The data for the tokens to be revoked from the pack.
     */
    function onRevoke(
        uint256 /* tokenId */,
        address account,
        bytes calldata additionalData
    ) external override {
        // unpack data
        AdditionalData[] memory tokensData = abi.decode(
            additionalData,
            (AdditionalData[])
        );

        // Iterate over the array of TokenData objects
        for (uint256 i = 0; i < tokensData.length; i++) {
            IERC6551Executable(payable(account)).execute(
                tokensData[i].tokenAddress,
                CALL_VALUE,
                abi.encodeWithSignature(
                    "safeTransferFrom(address,address,uint256)",
                    account,
                    msg.sender,
                    tokensData[i].tokenId
                ),
                CALL_OPERATION
            );
        }

        return;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC721/IERC721.sol)

pragma solidity ^0.8.20;

import {IERC165} from "../../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 address zero.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool approved) external;

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/introspection/IERC165.sol)

pragma solidity ^0.8.20;

/**
 * @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);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

/// @dev the ERC-165 identifier for this interface is `0x74420f4c`
interface IERC6551Executable {
    /**
     * @dev Executes a low-level operation if the caller is a valid signer on the account
     *
     * Reverts and bubbles up error if operation fails
     *
     * @param to        The target address of the operation
     * @param value     The Ether value to be sent to the target
     * @param data      The encoded operation calldata
     * @param operation A value indicating the type of operation to perform
     *
     * Accounts implementing this interface MUST accept the following operation parameter values:
     * - 0 = CALL
     * - 1 = DELEGATECALL
     * - 2 = CREATE
     * - 3 = CREATE2
     *
     * Accounts implementing this interface MAY support additional operations or restrict a signer's
     * ability to execute certain operations
     *
     * @return The result of the operation
     */
    function execute(
        address to,
        uint256 value,
        bytes calldata data,
        uint256 operation
    ) external payable returns (bytes memory);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

interface IPackModule {
    // Lifecycle functions
    function onCreate(
        uint256 tokenId,
        address account,
        bytes calldata additionalData
    ) external payable;

    function onOpen(
        uint256 tokenId,
        address account,
        address claimer,
        bytes calldata additionalData
    ) external;

    function onRevoke(
        uint256 tokenId,
        address account,
        bytes calldata additionalData
    ) external;
}

{
  "evmVersion": "paris",
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

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[{"inputs":[],"name":"CALL_OPERATION","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"CALL_VALUE","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"address","name":"account","type":"address"},{"internalType":"bytes","name":"additionalData","type":"bytes"}],"name":"onCreate","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"address","name":"account","type":"address"},{"internalType":"address","name":"claimer","type":"address"},{"internalType":"bytes","name":"additionalData","type":"bytes"}],"name":"onOpen","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"address","name":"account","type":"address"},{"internalType":"bytes","name":"additionalData","type":"bytes"}],"name":"onRevoke","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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