@hyperlane-xyz/core/dependencies/@eth-optimism-contracts-0.6.0/packages/contracts-periphery/deployments/mainnet/solcInputs/b09909e91a3ff9823ceba49a3a845230.json

Core solidity contracts for Hyperlane

{
  "language": "Solidity",
  "sources": {
    "contracts/L1/messaging/L1ERC721Bridge.sol": {
      "content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.9;\n\nimport {\n    CrossDomainEnabled\n} from \"@eth-optimism/contracts/contracts/libraries/bridge/CrossDomainEnabled.sol\";\nimport {\n    OwnableUpgradeable\n} from \"@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol\";\nimport { IERC721 } from \"@openzeppelin/contracts/token/ERC721/IERC721.sol\";\nimport { Address } from \"@openzeppelin/contracts/utils/Address.sol\";\nimport { L2ERC721Bridge } from \"../../L2/messaging/L2ERC721Bridge.sol\";\n\n/**\n * @title L1ERC721Bridge\n * @notice The L1 ERC721 bridge is a contract which works together with the L2 ERC721 bridge to\n *         make it possible to transfer ERC721 tokens between Optimism and Ethereum. This contract\n *         acts as an escrow for ERC721 tokens deposted into L2.\n */\ncontract L1ERC721Bridge is CrossDomainEnabled, OwnableUpgradeable {\n    /**\n     * @notice Contract version number.\n     */\n    uint8 public constant VERSION = 1;\n\n    /**\n     * @notice Emitted when an ERC721 bridge to the other network is initiated.\n     *\n     * @param localToken  Address of the token on this domain.\n     * @param remoteToken Address of the token on the remote domain.\n     * @param from        Address that initiated bridging action.\n     * @param to          Address to receive the token.\n     * @param tokenId     ID of the specific token deposited.\n     * @param extraData   Extra data for use on the client-side.\n     */\n    event ERC721BridgeInitiated(\n        address indexed localToken,\n        address indexed remoteToken,\n        address indexed from,\n        address to,\n        uint256 tokenId,\n        bytes extraData\n    );\n\n    /**\n     * @notice Emitted when an ERC721 bridge from the other network is finalized.\n     *\n     * @param localToken  Address of the token on this domain.\n     * @param remoteToken Address of the token on the remote domain.\n     * @param from        Address that initiated bridging action.\n     * @param to          Address to receive the token.\n     * @param tokenId     ID of the specific token deposited.\n     * @param extraData   Extra data for use on the client-side.\n     */\n    event ERC721BridgeFinalized(\n        address indexed localToken,\n        address indexed remoteToken,\n        address indexed from,\n        address to,\n        uint256 tokenId,\n        bytes extraData\n    );\n\n    /**\n     * @notice Address of the bridge on the other network.\n     */\n    address public otherBridge;\n\n    // Maps L1 token to L2 token to token ID to a boolean indicating if the token is deposited\n    /**\n     * @notice Mapping of L1 token to L2 token to ID to boolean, indicating if the given L1 token\n     *         by ID was deposited for a given L2 token.\n     */\n    mapping(address => mapping(address => mapping(uint256 => bool))) public deposits;\n\n    /**\n     * @param _messenger   Address of the CrossDomainMessenger on this network.\n     * @param _otherBridge Address of the ERC721 bridge on the other network.\n     */\n    constructor(address _messenger, address _otherBridge) CrossDomainEnabled(address(0)) {\n        initialize(_messenger, _otherBridge);\n    }\n\n    /**\n     * @param _messenger   Address of the CrossDomainMessenger on this network.\n     * @param _otherBridge Address of the ERC721 bridge on the other network.\n     */\n    function initialize(address _messenger, address _otherBridge) public reinitializer(VERSION) {\n        messenger = _messenger;\n        otherBridge = _otherBridge;\n\n        // Initialize upgradable OZ contracts\n        __Ownable_init();\n    }\n\n    /**\n     * @notice Initiates a bridge of an NFT to the caller's account on L2.\n     *\n     * @param _localToken  Address of the ERC721 on this domain.\n     * @param _remoteToken Address of the ERC721 on the remote domain.\n     * @param _tokenId     Token ID to bridge.\n     * @param _minGasLimit Minimum gas limit for the bridge message on the other domain.\n     * @param _extraData   Optional data to forward to L2. Data supplied here will not be used to\n     *                     execute any code on L2 and is only emitted as extra data for the\n     *                     convenience of off-chain tooling.\n     */\n    function bridgeERC721(\n        address _localToken,\n        address _remoteToken,\n        uint256 _tokenId,\n        uint32 _minGasLimit,\n        bytes calldata _extraData\n    ) external {\n        // Modifier requiring sender to be EOA. This check could be bypassed by a malicious\n        // contract via initcode, but it takes care of the user error we want to avoid.\n        require(!Address.isContract(msg.sender), \"L1ERC721Bridge: account is not externally owned\");\n\n        _initiateBridgeERC721(\n            _localToken,\n            _remoteToken,\n            msg.sender,\n            msg.sender,\n            _tokenId,\n            _minGasLimit,\n            _extraData\n        );\n    }\n\n    /**\n     * @notice Initiates a bridge of an NFT to some recipient's account on L2.\n     *\n     * @param _localToken  Address of the ERC721 on this domain.\n     * @param _remoteToken Address of the ERC721 on the remote domain.\n     * @param _to          Address to receive the token on the other domain.\n     * @param _tokenId     Token ID to bridge.\n     * @param _minGasLimit Minimum gas limit for the bridge message on the other domain.\n     * @param _extraData   Optional data to forward to L2. Data supplied here will not be used to\n     *                     execute any code on L2 and is only emitted as extra data for the\n     *                     convenience of off-chain tooling.\n     */\n    function bridgeERC721To(\n        address _localToken,\n        address _remoteToken,\n        address _to,\n        uint256 _tokenId,\n        uint32 _minGasLimit,\n        bytes calldata _extraData\n    ) external {\n        _initiateBridgeERC721(\n            _localToken,\n            _remoteToken,\n            msg.sender,\n            _to,\n            _tokenId,\n            _minGasLimit,\n            _extraData\n        );\n    }\n\n    /*************************\n     * Cross-chain Functions *\n     *************************/\n\n    /**\n     * @notice Completes an ERC721 bridge from the other domain and sends the ERC721 token to the\n     *         recipient on this domain.\n     *\n     * @param _localToken  Address of the ERC721 token on this domain.\n     * @param _remoteToken Address of the ERC721 token on the other domain.\n     * @param _from        Address that triggered the bridge on the other domain.\n     * @param _to          Address to receive the token on this domain.\n     * @param _tokenId     ID of the token being deposited.\n     * @param _extraData   Optional data to forward to L2. Data supplied here will not be used to\n     *                     execute any code on L2 and is only emitted as extra data for the\n     *                     convenience of off-chain tooling.\n     */\n    function finalizeBridgeERC721(\n        address _localToken,\n        address _remoteToken,\n        address _from,\n        address _to,\n        uint256 _tokenId,\n        bytes calldata _extraData\n    ) external onlyFromCrossDomainAccount(otherBridge) {\n        // Checks that the L1/L2 token pair has a token ID that is escrowed in the L1 Bridge\n        require(\n            deposits[_localToken][_remoteToken][_tokenId] == true,\n            \"Token ID is not escrowed in the L1 Bridge\"\n        );\n\n        deposits[_localToken][_remoteToken][_tokenId] = false;\n\n        // When a withdrawal is finalized on L1, the L1 Bridge transfers the NFT to the withdrawer\n        // slither-disable-next-line reentrancy-events\n        IERC721(_localToken).transferFrom(address(this), _to, _tokenId);\n\n        // slither-disable-next-line reentrancy-events\n        emit ERC721BridgeFinalized(_localToken, _remoteToken, _from, _to, _tokenId, _extraData);\n    }\n\n    /**\n     * @notice Internal function for initiating a token bridge to the other domain.\n     *\n     * @param _localToken  Address of the ERC721 on this domain.\n     * @param _remoteToken Address of the ERC721 on the remote domain.\n     * @param _from        Address of the sender on this domain.\n     * @param _to          Address to receive the token on the other domain.\n     * @param _tokenId     Token ID to bridge.\n     * @param _minGasLimit Minimum gas limit for the bridge message on the other domain.\n     * @param _extraData   Optional data to forward to L2. Data supplied here will not be used to\n     *                     execute any code on L2 and is only emitted as extra data for the\n     *                     convenience of off-chain tooling.\n     */\n    function _initiateBridgeERC721(\n        address _localToken,\n        address _remoteToken,\n        address _from,\n        address _to,\n        uint256 _tokenId,\n        uint32 _minGasLimit,\n        bytes calldata _extraData\n    ) internal {\n        // Construct calldata for _l2Token.finalizeBridgeERC721(_to, _tokenId)\n        bytes memory message = abi.encodeWithSelector(\n            L2ERC721Bridge.finalizeBridgeERC721.selector,\n            _remoteToken,\n            _localToken,\n            _from,\n            _to,\n            _tokenId,\n            _extraData\n        );\n\n        // Lock token into bridge\n        deposits[_localToken][_remoteToken][_tokenId] = true;\n        IERC721(_localToken).transferFrom(_from, address(this), _tokenId);\n\n        // Send calldata into L2\n        sendCrossDomainMessage(otherBridge, _minGasLimit, message);\n        emit ERC721BridgeInitiated(_localToken, _remoteToken, _from, _to, _tokenId, _extraData);\n    }\n}\n"
    },
    "@eth-optimism/contracts/contracts/libraries/bridge/CrossDomainEnabled.sol": {
      "content": "// SPDX-License-Identifier: MIT\npragma solidity >0.5.0 <0.9.0;\n\n/* Interface Imports */\nimport { ICrossDomainMessenger } from \"./ICrossDomainMessenger.sol\";\n\n/**\n * @title CrossDomainEnabled\n * @dev Helper contract for contracts performing cross-domain communications\n *\n * Compiler used: defined by inheriting contract\n */\ncontract CrossDomainEnabled {\n    /*************\n     * Variables *\n     *************/\n\n    // Messenger contract used to send and recieve messages from the other domain.\n    address public messenger;\n\n    /***************\n     * Constructor *\n     ***************/\n\n    /**\n     * @param _messenger Address of the CrossDomainMessenger on the current layer.\n     */\n    constructor(address _messenger) {\n        messenger = _messenger;\n    }\n\n    /**********************\n     * Function Modifiers *\n     **********************/\n\n    /**\n     * Enforces that the modified function is only callable by a specific cross-domain account.\n     * @param _sourceDomainAccount The only account on the originating domain which is\n     *  authenticated to call this function.\n     */\n    modifier onlyFromCrossDomainAccount(address _sourceDomainAccount) {\n        require(\n            msg.sender == address(getCrossDomainMessenger()),\n            \"OVM_XCHAIN: messenger contract unauthenticated\"\n        );\n\n        require(\n            getCrossDomainMessenger().xDomainMessageSender() == _sourceDomainAccount,\n            \"OVM_XCHAIN: wrong sender of cross-domain message\"\n        );\n\n        _;\n    }\n\n    /**********************\n     * Internal Functions *\n     **********************/\n\n    /**\n     * Gets the messenger, usually from storage. This function is exposed in case a child contract\n     * needs to override.\n     * @return The address of the cross-domain messenger contract which should be used.\n     */\n    function getCrossDomainMessenger() internal virtual returns (ICrossDomainMessenger) {\n        return ICrossDomainMessenger(messenger);\n    }\n\n    /**q\n     * Sends a message to an account on another domain\n     * @param _crossDomainTarget The intended recipient on the destination domain\n     * @param _message The data to send to the target (usually calldata to a function with\n     *  `onlyFromCrossDomainAccount()`)\n     * @param _gasLimit The gasLimit for the receipt of the message on the target domain.\n     */\n    function sendCrossDomainMessage(\n        address _crossDomainTarget,\n        uint32 _gasLimit,\n        bytes memory _message\n    ) internal {\n        // slither-disable-next-line reentrancy-events, reentrancy-benign\n        getCrossDomainMessenger().sendMessage(_crossDomainTarget, _message, _gasLimit);\n    }\n}\n"
    },
    "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../utils/ContextUpgradeable.sol\";\nimport \"../proxy/utils/Initializable.sol\";\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n    address private _owner;\n\n    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n    /**\n     * @dev Initializes the contract setting the deployer as the initial owner.\n     */\n    function __Ownable_init() internal onlyInitializing {\n        __Ownable_init_unchained();\n    }\n\n    function __Ownable_init_unchained() internal onlyInitializing {\n        _transferOwnership(_msgSender());\n    }\n\n    /**\n     * @dev Returns the address of the current owner.\n     */\n    function owner() public view virtual returns (address) {\n        return _owner;\n    }\n\n    /**\n     * @dev Throws if called by any account other than the owner.\n     */\n    modifier onlyOwner() {\n        require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n        _;\n    }\n\n    /**\n     * @dev Leaves the contract without owner. It will not be possible to call\n     * `onlyOwner` functions anymore. Can only be called by the current owner.\n     *\n     * NOTE: Renouncing ownership will leave the contract without an owner,\n     * thereby removing any functionality that is only available to the owner.\n     */\n    function renounceOwnership() public virtual onlyOwner {\n        _transferOwnership(address(0));\n    }\n\n    /**\n     * @dev Transfers ownership of the contract to a new account (`newOwner`).\n     * Can only be called by the current owner.\n     */\n    function transferOwnership(address newOwner) public virtual onlyOwner {\n        require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n        _transferOwnership(newOwner);\n    }\n\n    /**\n     * @dev Transfers ownership of the contract to a new account (`newOwner`).\n     * Internal function without access restriction.\n     */\n    function _transferOwnership(address newOwner) internal virtual {\n        address oldOwner = _owner;\n        _owner = newOwner;\n        emit OwnershipTransferred(oldOwner, newOwner);\n    }\n\n    /**\n     * @dev This empty reserved space is put in place to allow future versions to add new\n     * variables without shifting down storage in the inheritance chain.\n     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n     */\n    uint256[49] private __gap;\n}\n"
    },
    "@openzeppelin/contracts/token/ERC721/IERC721.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../../utils/introspection/IERC165.sol\";\n\n/**\n * @dev Required interface of an ERC721 compliant contract.\n */\ninterface IERC721 is IERC165 {\n    /**\n     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.\n     */\n    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);\n\n    /**\n     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.\n     */\n    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);\n\n    /**\n     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.\n     */\n    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);\n\n    /**\n     * @dev Returns the number of tokens in ``owner``'s account.\n     */\n    function balanceOf(address owner) external view returns (uint256 balance);\n\n    /**\n     * @dev Returns the owner of the `tokenId` token.\n     *\n     * Requirements:\n     *\n     * - `tokenId` must exist.\n     */\n    function ownerOf(uint256 tokenId) external view returns (address owner);\n\n    /**\n     * @dev Safely transfers `tokenId` token from `from` to `to`.\n     *\n     * Requirements:\n     *\n     * - `from` cannot be the zero address.\n     * - `to` cannot be the zero address.\n     * - `tokenId` token must exist and be owned by `from`.\n     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.\n     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\n     *\n     * Emits a {Transfer} event.\n     */\n    function safeTransferFrom(\n        address from,\n        address to,\n        uint256 tokenId,\n        bytes calldata data\n    ) external;\n\n    /**\n     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients\n     * are aware of the ERC721 protocol to prevent tokens from being forever locked.\n     *\n     * Requirements:\n     *\n     * - `from` cannot be the zero address.\n     * - `to` cannot be the zero address.\n     * - `tokenId` token must exist and be owned by `from`.\n     * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.\n     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\n     *\n     * Emits a {Transfer} event.\n     */\n    function safeTransferFrom(\n        address from,\n        address to,\n        uint256 tokenId\n    ) external;\n\n    /**\n     * @dev Transfers `tokenId` token from `from` to `to`.\n     *\n     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.\n     *\n     * Requirements:\n     *\n     * - `from` cannot be the zero address.\n     * - `to` cannot be the zero address.\n     * - `tokenId` token must be owned by `from`.\n     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transferFrom(\n        address from,\n        address to,\n        uint256 tokenId\n    ) external;\n\n    /**\n     * @dev Gives permission to `to` to transfer `tokenId` token to another account.\n     * The approval is cleared when the token is transferred.\n     *\n     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.\n     *\n     * Requirements:\n     *\n     * - The caller must own the token or be an approved operator.\n     * - `tokenId` must exist.\n     *\n     * Emits an {Approval} event.\n     */\n    function approve(address to, uint256 tokenId) external;\n\n    /**\n     * @dev Approve or remove `operator` as an operator for the caller.\n     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.\n     *\n     * Requirements:\n     *\n     * - The `operator` cannot be the caller.\n     *\n     * Emits an {ApprovalForAll} event.\n     */\n    function setApprovalForAll(address operator, bool _approved) external;\n\n    /**\n     * @dev Returns the account approved for `tokenId` token.\n     *\n     * Requirements:\n     *\n     * - `tokenId` must exist.\n     */\n    function getApproved(uint256 tokenId) external view returns (address operator);\n\n    /**\n     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.\n     *\n     * See {setApprovalForAll}\n     */\n    function isApprovedForAll(address owner, address operator) external view returns (bool);\n}\n"
    },
    "@openzeppelin/contracts/utils/Address.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)\n\npragma solidity ^0.8.1;\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary Address {\n    /**\n     * @dev Returns true if `account` is a contract.\n     *\n     * [IMPORTANT]\n     * ====\n     * It is unsafe to assume that an address for which this function returns\n     * false is an externally-owned account (EOA) and not a contract.\n     *\n     * Among others, `isContract` will return false for the following\n     * types of addresses:\n     *\n     *  - an externally-owned account\n     *  - a contract in construction\n     *  - an address where a contract will be created\n     *  - an address where a contract lived, but was destroyed\n     * ====\n     *\n     * [IMPORTANT]\n     * ====\n     * You shouldn't rely on `isContract` to protect against flash loan attacks!\n     *\n     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n     * constructor.\n     * ====\n     */\n    function isContract(address account) internal view returns (bool) {\n        // This method relies on extcodesize/address.code.length, which returns 0\n        // for contracts in construction, since the code is only stored at the end\n        // of the constructor execution.\n\n        return account.code.length > 0;\n    }\n\n    /**\n     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n     * `recipient`, forwarding all available gas and reverting on errors.\n     *\n     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n     * of certain opcodes, possibly making contracts go over the 2300 gas limit\n     * imposed by `transfer`, making them unable to receive funds via\n     * `transfer`. {sendValue} removes this limitation.\n     *\n     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n     *\n     * IMPORTANT: because control is transferred to `recipient`, care must be\n     * taken to not create reentrancy vulnerabilities. Consider using\n     * {ReentrancyGuard} or the\n     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n     */\n    function sendValue(address payable recipient, uint256 amount) internal {\n        require(address(this).balance >= amount, \"Address: insufficient balance\");\n\n        (bool success, ) = recipient.call{value: amount}(\"\");\n        require(success, \"Address: unable to send value, recipient may have reverted\");\n    }\n\n    /**\n     * @dev Performs a Solidity function call using a low level `call`. A\n     * plain `call` is an unsafe replacement for a function call: use this\n     * function instead.\n     *\n     * If `target` reverts with a revert reason, it is bubbled up by this\n     * function (like regular Solidity function calls).\n     *\n     * Returns the raw returned data. To convert to the expected return value,\n     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n     *\n     * Requirements:\n     *\n     * - `target` must be a contract.\n     * - calling `target` with `data` must not revert.\n     *\n     * _Available since v3.1._\n     */\n    function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n        return functionCall(target, data, \"Address: low-level call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n     * `errorMessage` as a fallback revert reason when `target` reverts.\n     *\n     * _Available since v3.1._\n     */\n    function functionCall(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        return functionCallWithValue(target, data, 0, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but also transferring `value` wei to `target`.\n     *\n     * Requirements:\n     *\n     * - the calling contract must have an ETH balance of at least `value`.\n     * - the called Solidity function must be `payable`.\n     *\n     * _Available since v3.1._\n     */\n    function functionCallWithValue(\n        address target,\n        bytes memory data,\n        uint256 value\n    ) internal returns (bytes memory) {\n        return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n     * with `errorMessage` as a fallback revert reason when `target` reverts.\n     *\n     * _Available since v3.1._\n     */\n    function functionCallWithValue(\n        address target,\n        bytes memory data,\n        uint256 value,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        require(address(this).balance >= value, \"Address: insufficient balance for call\");\n        require(isContract(target), \"Address: call to non-contract\");\n\n        (bool success, bytes memory returndata) = target.call{value: value}(data);\n        return verifyCallResult(success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but performing a static call.\n     *\n     * _Available since v3.3._\n     */\n    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n        return functionStaticCall(target, data, \"Address: low-level static call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n     * but performing a static call.\n     *\n     * _Available since v3.3._\n     */\n    function functionStaticCall(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal view returns (bytes memory) {\n        require(isContract(target), \"Address: static call to non-contract\");\n\n        (bool success, bytes memory returndata) = target.staticcall(data);\n        return verifyCallResult(success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but performing a delegate call.\n     *\n     * _Available since v3.4._\n     */\n    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n        return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n     * but performing a delegate call.\n     *\n     * _Available since v3.4._\n     */\n    function functionDelegateCall(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        require(isContract(target), \"Address: delegate call to non-contract\");\n\n        (bool success, bytes memory returndata) = target.delegatecall(data);\n        return verifyCallResult(success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the\n     * revert reason using the provided one.\n     *\n     * _Available since v4.3._\n     */\n    function verifyCallResult(\n        bool success,\n        bytes memory returndata,\n        string memory errorMessage\n    ) internal pure returns (bytes memory) {\n        if (success) {\n            return returndata;\n        } else {\n            // Look for revert reason and bubble it up if present\n            if (returndata.length > 0) {\n                // The easiest way to bubble the revert reason is using memory via assembly\n\n                assembly {\n                    let returndata_size := mload(returndata)\n                    revert(add(32, returndata), returndata_size)\n                }\n            } else {\n                revert(errorMessage);\n            }\n        }\n    }\n}\n"
    },
    "contracts/L2/messaging/L2ERC721Bridge.sol": {
      "content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.9;\n\nimport {\n    CrossDomainEnabled\n} from \"@eth-optimism/contracts/contracts/libraries/bridge/CrossDomainEnabled.sol\";\nimport {\n    OwnableUpgradeable\n} from \"@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol\";\nimport { ERC165Checker } from \"@openzeppelin/contracts/utils/introspection/ERC165Checker.sol\";\nimport { Address } from \"@openzeppelin/contracts/utils/Address.sol\";\nimport { L1ERC721Bridge } from \"../../L1/messaging/L1ERC721Bridge.sol\";\nimport { IOptimismMintableERC721 } from \"../../universal/op-erc721/IOptimismMintableERC721.sol\";\n\n/**\n * @title L2ERC721Bridge\n * @notice The L2 ERC721 bridge is a contract which works together with the L1 ERC721 bridge to\n *         make it possible to transfer ERC721 tokens between Optimism and Ethereum. This contract\n *         acts as a minter for new tokens when it hears about deposits into the L1 ERC721 bridge.\n *         This contract also acts as a burner for tokens being withdrawn.\n */\ncontract L2ERC721Bridge is CrossDomainEnabled, OwnableUpgradeable {\n    /**\n     * @notice Contract version number.\n     */\n    uint8 public constant VERSION = 1;\n\n    /**\n     * @notice Emitted when an ERC721 bridge to the other network is initiated.\n     *\n     * @param localToken  Address of the token on this domain.\n     * @param remoteToken Address of the token on the remote domain.\n     * @param from        Address that initiated bridging action.\n     * @param to          Address to receive the token.\n     * @param tokenId     ID of the specific token deposited.\n     * @param extraData   Extra data for use on the client-side.\n     */\n    event ERC721BridgeInitiated(\n        address indexed localToken,\n        address indexed remoteToken,\n        address indexed from,\n        address to,\n        uint256 tokenId,\n        bytes extraData\n    );\n\n    /**\n     * @notice Emitted when an ERC721 bridge from the other network is finalized.\n     *\n     * @param localToken  Address of the token on this domain.\n     * @param remoteToken Address of the token on the remote domain.\n     * @param from        Address that initiated bridging action.\n     * @param to          Address to receive the token.\n     * @param tokenId     ID of the specific token deposited.\n     * @param extraData   Extra data for use on the client-side.\n     */\n    event ERC721BridgeFinalized(\n        address indexed localToken,\n        address indexed remoteToken,\n        address indexed from,\n        address to,\n        uint256 tokenId,\n        bytes extraData\n    );\n\n    /**\n     * @notice Emitted when an ERC721 bridge from the other network fails.\n     *\n     * @param localToken  Address of the token on this domain.\n     * @param remoteToken Address of the token on the remote domain.\n     * @param from        Address that initiated bridging action.\n     * @param to          Address to receive the token.\n     * @param tokenId     ID of the specific token deposited.\n     * @param extraData   Extra data for use on the client-side.\n     */\n    event ERC721BridgeFailed(\n        address indexed localToken,\n        address indexed remoteToken,\n        address indexed from,\n        address to,\n        uint256 tokenId,\n        bytes extraData\n    );\n\n    /**\n     * @notice Address of the bridge on the other network.\n     */\n    address public otherBridge;\n\n    /**\n     * @param _messenger   Address of the CrossDomainMessenger on this network.\n     * @param _otherBridge Address of the ERC721 bridge on the other network.\n     */\n    constructor(address _messenger, address _otherBridge) CrossDomainEnabled(address(0)) {\n        initialize(_messenger, _otherBridge);\n    }\n\n    /**\n     * @param _messenger   Address of the CrossDomainMessenger on this network.\n     * @param _otherBridge Address of the ERC721 bridge on the other network.\n     */\n    function initialize(address _messenger, address _otherBridge) public reinitializer(VERSION) {\n        messenger = _messenger;\n        otherBridge = _otherBridge;\n\n        // Initialize upgradable OZ contracts\n        __Ownable_init();\n    }\n\n    /**\n     * @notice Initiates a bridge of an NFT to the caller's account on L1.\n     *\n     * @param _localToken  Address of the ERC721 on this domain.\n     * @param _remoteToken Address of the ERC721 on the remote domain.\n     * @param _tokenId     Token ID to bridge.\n     * @param _minGasLimit Minimum gas limit for the bridge message on the other domain.\n     * @param _extraData   Optional data to forward to L1. Data supplied here will not be used to\n     *                     execute any code on L1 and is only emitted as extra data for the\n     *                     convenience of off-chain tooling.\n     */\n    function bridgeERC721(\n        address _localToken,\n        address _remoteToken,\n        uint256 _tokenId,\n        uint32 _minGasLimit,\n        bytes calldata _extraData\n    ) external {\n        // Modifier requiring sender to be EOA. This check could be bypassed by a malicious\n        // contract via initcode, but it takes care of the user error we want to avoid.\n        require(!Address.isContract(msg.sender), \"L2ERC721Bridge: account is not externally owned\");\n\n        _initiateBridgeERC721(\n            _localToken,\n            _remoteToken,\n            msg.sender,\n            msg.sender,\n            _tokenId,\n            _minGasLimit,\n            _extraData\n        );\n    }\n\n    /**\n     * @notice Initiates a bridge of an NFT to some recipient's account on L1.\n     *\n     * @param _localToken  Address of the ERC721 on this domain.\n     * @param _remoteToken Address of the ERC721 on the remote domain.\n     * @param _to          Address to receive the token on the other domain.\n     * @param _tokenId     Token ID to bridge.\n     * @param _minGasLimit Minimum gas limit for the bridge message on the other domain.\n     * @param _extraData   Optional data to forward to L1. Data supplied here will not be used to\n     *                     execute any code on L1 and is only emitted as extra data for the\n     *                     convenience of off-chain tooling.\n     */\n    function bridgeERC721To(\n        address _localToken,\n        address _remoteToken,\n        address _to,\n        uint256 _tokenId,\n        uint32 _minGasLimit,\n        bytes calldata _extraData\n    ) external {\n        _initiateBridgeERC721(\n            _localToken,\n            _remoteToken,\n            msg.sender,\n            _to,\n            _tokenId,\n            _minGasLimit,\n            _extraData\n        );\n    }\n\n    /**\n     * @notice Completes an ERC721 bridge from the other domain and sends the ERC721 token to the\n     *         recipient on this domain.\n     *\n     * @param _localToken  Address of the ERC721 token on this domain.\n     * @param _remoteToken Address of the ERC721 token on the other domain.\n     * @param _from        Address that triggered the bridge on the other domain.\n     * @param _to          Address to receive the token on this domain.\n     * @param _tokenId     ID of the token being deposited.\n     * @param _extraData   Optional data to forward to L1. Data supplied here will not be used to\n     *                     execute any code on L1 and is only emitted as extra data for the\n     *                     convenience of off-chain tooling.\n     */\n    function finalizeBridgeERC721(\n        address _localToken,\n        address _remoteToken,\n        address _from,\n        address _to,\n        uint256 _tokenId,\n        bytes calldata _extraData\n    ) external onlyFromCrossDomainAccount(otherBridge) {\n        // Check the target token is compliant and verify the deposited token on L1 matches the L2\n        // deposited token representation.\n        if (\n            // slither-disable-next-line reentrancy-events\n            ERC165Checker.supportsInterface(\n                _localToken,\n                type(IOptimismMintableERC721).interfaceId\n            ) && _remoteToken == IOptimismMintableERC721(_localToken).remoteToken()\n        ) {\n            // When a deposit is finalized, we give the NFT with the same tokenId to the account\n            // on L2.\n            // slither-disable-next-line reentrancy-events\n            IOptimismMintableERC721(_localToken).mint(_to, _tokenId);\n            // slither-disable-next-line reentrancy-events\n            emit ERC721BridgeFinalized(_localToken, _remoteToken, _from, _to, _tokenId, _extraData);\n        } else {\n            // Either the L2 token which is being deposited-into disagrees about the correct address\n            // of its L1 token, or does not support the correct interface.\n            // This should only happen if there is a  malicious L2 token, or if a user somehow\n            // specified the wrong L2 token address to deposit into.\n            // In either case, we stop the process here and construct a withdrawal\n            // message so that users can get their NFT out in some cases.\n            // There is no way to prevent malicious token contracts altogether, but this does limit\n            // user error and mitigate some forms of malicious contract behavior.\n            bytes memory message = abi.encodeWithSelector(\n                L1ERC721Bridge.finalizeBridgeERC721.selector,\n                _remoteToken,\n                _localToken,\n                _to, // switched the _to and _from here to bounce back the deposit to the sender\n                _from,\n                _tokenId,\n                _extraData\n            );\n\n            // Send message up to L1 bridge\n            // slither-disable-next-line reentrancy-events\n            sendCrossDomainMessage(otherBridge, 0, message);\n\n            // slither-disable-next-line reentrancy-events\n            emit ERC721BridgeFailed(_localToken, _remoteToken, _from, _to, _tokenId, _extraData);\n        }\n    }\n\n    /**\n     * @notice Internal function for initiating a token bridge to the other domain.\n     *\n     * @param _localToken  Address of the ERC721 on this domain.\n     * @param _remoteToken Address of the ERC721 on the remote domain.\n     * @param _from        Address of the sender on this domain.\n     * @param _to          Address to receive the token on the other domain.\n     * @param _tokenId     Token ID to bridge.\n     * @param _minGasLimit Minimum gas limit for the bridge message on the other domain.\n     * @param _extraData   Optional data to forward to L1. Data supplied here will not be used to\n     *                     execute any code on L1 and is only emitted as extra data for the\n     *                     convenience of off-chain tooling.\n     */\n    function _initiateBridgeERC721(\n        address _localToken,\n        address _remoteToken,\n        address _from,\n        address _to,\n        uint256 _tokenId,\n        uint32 _minGasLimit,\n        bytes calldata _extraData\n    ) internal {\n        // Check that the withdrawal is being initiated by the NFT owner\n        require(\n            _from == IOptimismMintableERC721(_localToken).ownerOf(_tokenId),\n            \"Withdrawal is not being initiated by NFT owner\"\n        );\n\n        // When a withdrawal is initiated, we burn the withdrawer's NFT to prevent subsequent L2\n        // usage\n        // slither-disable-next-line reentrancy-events\n        IOptimismMintableERC721(_localToken).burn(_from, _tokenId);\n\n        // Construct calldata for l1ERC721Bridge.finalizeBridgeERC721(_to, _tokenId)\n        // slither-disable-next-line reentrancy-events\n        address remoteToken = IOptimismMintableERC721(_localToken).remoteToken();\n        require(\n            remoteToken == _remoteToken,\n            \"L2ERC721Bridge: remote token does not match given value\"\n        );\n\n        bytes memory message = abi.encodeWithSelector(\n            L1ERC721Bridge.finalizeBridgeERC721.selector,\n            remoteToken,\n            _localToken,\n            _from,\n            _to,\n            _tokenId,\n            _extraData\n        );\n\n        // Send message to L1 bridge\n        // slither-disable-next-line reentrancy-events\n        sendCrossDomainMessage(otherBridge, _minGasLimit, message);\n\n        // slither-disable-next-line reentrancy-events\n        emit ERC721BridgeInitiated(_localToken, remoteToken, _from, _to, _tokenId, _extraData);\n    }\n}\n"
    },
    "@eth-optimism/contracts/contracts/libraries/bridge/ICrossDomainMessenger.sol": {
      "content": "// SPDX-License-Identifier: MIT\npragma solidity >0.5.0 <0.9.0;\n\n/**\n * @title ICrossDomainMessenger\n */\ninterface ICrossDomainMessenger {\n    /**********\n     * Events *\n     **********/\n\n    event SentMessage(\n        address indexed target,\n        address sender,\n        bytes message,\n        uint256 messageNonce,\n        uint256 gasLimit\n    );\n    event RelayedMessage(bytes32 indexed msgHash);\n    event FailedRelayedMessage(bytes32 indexed msgHash);\n\n    /*************\n     * Variables *\n     *************/\n\n    function xDomainMessageSender() external view returns (address);\n\n    /********************\n     * Public Functions *\n     ********************/\n\n    /**\n     * Sends a cross domain message to the target messenger.\n     * @param _target Target contract address.\n     * @param _message Message to send to the target.\n     * @param _gasLimit Gas limit for the provided message.\n     */\n    function sendMessage(\n        address _target,\n        bytes calldata _message,\n        uint32 _gasLimit\n    ) external;\n}\n"
    },
    "@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\npragma solidity ^0.8.0;\nimport \"../proxy/utils/Initializable.sol\";\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract ContextUpgradeable is Initializable {\n    function __Context_init() internal onlyInitializing {\n    }\n\n    function __Context_init_unchained() internal onlyInitializing {\n    }\n    function _msgSender() internal view virtual returns (address) {\n        return msg.sender;\n    }\n\n    function _msgData() internal view virtual returns (bytes calldata) {\n        return msg.data;\n    }\n\n    /**\n     * @dev This empty reserved space is put in place to allow future versions to add new\n     * variables without shifting down storage in the inheritance chain.\n     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n     */\n    uint256[50] private __gap;\n}\n"
    },
    "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol": {
      "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.6.0) (proxy/utils/Initializable.sol)\n\npragma solidity ^0.8.2;\n\nimport \"../../utils/AddressUpgradeable.sol\";\n\n/**\n * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed\n * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an\n * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer\n * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.\n *\n * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be\n * reused. This mechanism prevents re-execution of each \"step\" but allows the creation of new initialization steps in\n * case an upgrade adds a module that needs to be initialized.\n *\n * For example:\n *\n * [.hljs-theme-light.nopadding]\n * ```\n * contract MyToken is ERC20Upgradeable {\n *     function initialize() initializer public {\n *         __ERC20_init(\"MyToken\", \"MTK\");\n *     }\n * }\n * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {\n *     function initializeV2() reinitializer(2) public {\n *         __ERC20Permit_init(\"MyToken\");\n *     }\n * }\n * ```\n *\n * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as\n * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.\n *\n * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure\n * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.\n *\n * [CAUTION]\n * ====\n * Avoid leaving a contract uninitialized.\n *\n * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation\n * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke\n * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:\n *\n * [.hljs-theme-light.nopadding]\n * ```\n * /// @custom:oz-upgrades-unsafe-allow constructor\n * constructor() {\n *     _disableInitializers();\n * }\n * ```\n * ====\n */\nabstract contract Initializable {\n    /**\n     * @dev Indicates that the contract has been initialized.\n     * @custom:oz-retyped-from bool\n     */\n    uint8 private _initialized;\n\n    /**\n     * @dev Indicates that the contract is in the process of being initialized.\n     */\n    bool private _initializing;\n\n    /**\n     * @dev Triggered when the contract has been initialized or reinitialized.\n     */\n    event Initialized(uint8 version);\n\n    /**\n     * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,\n     * `onlyInitializing` functions can be used to initialize parent contracts. Equivalent to `reinitializer(1)`.\n     */\n    modifier initializer() {\n        bool isTopLevelCall = _setInitializedVersion(1);\n        if (isTopLevelCall) {\n            _initializing = true;\n        }\n        _;\n        if (isTopLevelCall) {\n            _initializing = false;\n            emit Initialized(1);\n        }\n    }\n\n    /**\n     * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the\n     * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be\n     * used to initialize parent contracts.\n     *\n     * `initializer` is equivalent to `reinitializer(1)`, so a reinitializer may be used after the original\n     * initialization step. This is essential to configure modules that are added through upgrades and that require\n     * initialization.\n     *\n     * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in\n     * a contract, executing them in the right order is up to the developer or operator.\n     */\n    modifier reinitializer(uint8 version) {\n        bool isTopLevelCall = _setInitializedVersion(version);\n        if (isTopLevelCall) {\n            _initializing = true;\n        }\n        _;\n        if (isTopLevelCall) {\n            _initializing = false;\n            emit Initialized(version);\n        }\n    }\n\n    /**\n     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the\n     * {initializer} and {reinitializer} modifiers, directly or indirectly.\n     */\n    modifier onlyInitializing() {\n        require(_initializing, \"Initializable: contract is not initializing\");\n        _;\n    }\n\n    /**\n     * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializ