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Contract

0xFf841Ce01c71Ea0304c38015d193A95a6A29967c

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Send To1169313732024-03-03 10:25:23279 days ago1709461523IN
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0.000108862180635 ETH0.000099998040.0066768
Send To1169301262024-03-03 9:43:49279 days ago1709459029IN
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0.000032540795473 ETH0.0001061011190.00663951
Send To1160743582024-02-12 14:18:13299 days ago1707747493IN
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0.000171767407487 ETH0.0001614963830.09787089
Send To1160742602024-02-12 14:14:57299 days ago1707747297IN
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0.000150506493998 ETH0.0001576325960.10103052
Send To1158345582024-02-07 1:04:53305 days ago1707267893IN
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0.00016265375995 ETH0.0000756770.00237367
Send To1149344822024-01-17 5:02:21326 days ago1705467741IN
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0.000106441800047 ETH0.0001468802730.099901
Send To1149344512024-01-17 5:01:19326 days ago1705467679IN
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0.00002005472162 ETH0.0001498561220.10067094
Send To1117655932023-11-04 20:32:43399 days ago1699129963IN
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0.000095642926397 ETH0.0000340661090.00877487
Send To1115106642023-10-29 22:55:05405 days ago1698620105IN
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0.000028822389893 ETH0.0000355368220.0108543
Send To1114874792023-10-29 10:02:15405 days ago1698573735IN
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0.000028822389893 ETH0.000035419990.01736581
Send To1106308202023-10-09 14:06:57425 days ago1696860417IN
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0.000311565440271 ETH0.0000433448270.0282283
Send To1106131752023-10-09 4:18:47426 days ago1696825127IN
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0.000031037845768 ETH0.0000305417850.02131571
Send To1100569482023-09-26 7:17:53439 days ago1695712673IN
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0.001583269154991 ETH0.0000362587960.05350175
Send To1100540892023-09-26 5:42:35439 days ago1695706955IN
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0.000032634236387 ETH0.0000441294630.07238092
Send To1098337632023-09-21 3:18:23444 days ago1695266303IN
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0.000092001901261 ETH0.0000385603310.05403943
Send To1092797982023-09-08 7:32:53457 days ago1694158373IN
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0.000091506454865 ETH0.0000262076450.00000158
Send To1092797462023-09-08 7:31:09457 days ago1694158269IN
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0.000032634236387 ETH0.0000247877990.00000183
Send To1092049572023-09-06 13:58:11458 days ago1694008691IN
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0.000032634236387 ETH0.0000452481670.0000001
Send To1089756642023-09-01 6:35:05464 days ago1693550105IN
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0.000094309492777 ETH0.0000258410460.00000007
Send To1084319672023-08-19 16:31:51476 days ago1692462711IN
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0.000328559686694 ETH0.0000629088490.00000831
Send To1084277342023-08-19 14:10:45476 days ago1692454245IN
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0.000099330974831 ETH0.0000338470780.00000041
Send To1084276462023-08-19 14:07:49476 days ago1692454069IN
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0.000031928719121 ETH0.0000320614030.00000045
Send To1084274432023-08-19 14:01:03476 days ago1692453663IN
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0.000323933843645 ETH0.0000288585640.00000026
Send To1082426302023-08-15 7:20:37481 days ago1692084037IN
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0.00009929285146 ETH0.0000763441870.10369739
Send To1082340942023-08-15 2:36:05481 days ago1692066965IN
0xFf841Ce0...a6A29967c
0.00009929285146 ETH0.0000813688350.10519615
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1169313732024-03-03 10:25:23279 days ago1709461523
0xFf841Ce0...a6A29967c
0.000108862180635 ETH
1169301262024-03-03 9:43:49279 days ago1709459029
0xFf841Ce0...a6A29967c
0.000032540795473 ETH
1160743582024-02-12 14:18:13299 days ago1707747493
0xFf841Ce0...a6A29967c
0.000171767407487 ETH
1160742602024-02-12 14:14:57299 days ago1707747297
0xFf841Ce0...a6A29967c
0.000150506493998 ETH
1158345582024-02-07 1:04:53305 days ago1707267893
0xFf841Ce0...a6A29967c
0.00016265375995 ETH
1149344822024-01-17 5:02:21326 days ago1705467741
0xFf841Ce0...a6A29967c
0.000106441800047 ETH
1149344512024-01-17 5:01:19326 days ago1705467679
0xFf841Ce0...a6A29967c
0.00002005472162 ETH
1117655932023-11-04 20:32:43399 days ago1699129963
0xFf841Ce0...a6A29967c
0.000095642926397 ETH
1115106642023-10-29 22:55:05405 days ago1698620105
0xFf841Ce0...a6A29967c
0.000028822389893 ETH
1114874792023-10-29 10:02:15405 days ago1698573735
0xFf841Ce0...a6A29967c
0.000028822389893 ETH
1106308202023-10-09 14:06:57425 days ago1696860417
0xFf841Ce0...a6A29967c
0.000311565440271 ETH
1106131752023-10-09 4:18:47426 days ago1696825127
0xFf841Ce0...a6A29967c
0.000031037845768 ETH
1100569482023-09-26 7:17:53439 days ago1695712673
0xFf841Ce0...a6A29967c
0.001583269154991 ETH
1100540892023-09-26 5:42:35439 days ago1695706955
0xFf841Ce0...a6A29967c
0.000032634236387 ETH
1098337632023-09-21 3:18:23444 days ago1695266303
0xFf841Ce0...a6A29967c
0.000092001901261 ETH
1092797982023-09-08 7:32:53457 days ago1694158373
0xFf841Ce0...a6A29967c
0.000091506454865 ETH
1092797462023-09-08 7:31:09457 days ago1694158269
0xFf841Ce0...a6A29967c
0.000032634236387 ETH
1092049572023-09-06 13:58:11458 days ago1694008691
0xFf841Ce0...a6A29967c
0.000032634236387 ETH
1089756642023-09-01 6:35:05464 days ago1693550105
0xFf841Ce0...a6A29967c
0.000094309492777 ETH
1086163562023-08-23 22:58:09472 days ago1692831489
0xFf841Ce0...a6A29967c
 Contract Creation0 ETH
1084319672023-08-19 16:31:51476 days ago1692462711
0xFf841Ce0...a6A29967c
0.000328559686694 ETH
1084277342023-08-19 14:10:45476 days ago1692454245
0xFf841Ce0...a6A29967c
0.000099330974831 ETH
1084276462023-08-19 14:07:49476 days ago1692454069
0xFf841Ce0...a6A29967c
0.000031928719121 ETH
1084274432023-08-19 14:01:03476 days ago1692453663
0xFf841Ce0...a6A29967c
0.000323933843645 ETH
1082426302023-08-15 7:20:37481 days ago1692084037
0xFf841Ce0...a6A29967c
0.00009929285146 ETH
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Contract Source Code Verified (Exact Match)

Contract Name:
ONFTGateway

Compiler Version
v0.8.7+commit.e28d00a7

Optimization Enabled:
Yes with 1 runs

Other Settings:
default evmVersion
File 1 of 17 : ONFTGateway.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.7;

import "../interfaces/IOmniApp.sol";
import "../interfaces/IOmnichainRouter.sol";
import "../interfaces/IONFTCopy.sol";
import "../interfaces/IOwnableERC721.sol";
import "./ONFTCopy.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

contract ONFTGateway is IOmniApp, Ownable {

    event OmReceived(string srcChain, address srcOA);
    event Transferred(address srcCollection, uint256 tokenId, address owner);
    event Locked(address collection, uint256 tokenId, address owner);

    IOmnichainRouter public omnichainRouter;
    mapping(address => mapping(uint256 => address)) public locked; // collection -> tokenId -> owner
    // Emergency unlock in case of a failed tx on the dstChain
    mapping(address => mapping(uint256 => bool)) public forceUnlockRequests; // collection -> tokenId -> isRequested
    mapping(address => address) public copyToOriginal;
    mapping(address => address) public originalToCopy;
    mapping(address => mapping(uint256 => bool)) public isCopy;
    string public chainName;
    mapping(string => address) public remoteChainToOA;
    address private _owner;
    address private _redirectionsBudgetManager;

    /**
     * @notice Sets the contract owner, feeManager address, router, and indicates source chain name for mappings.
     *
     * @param _router A contract that handles cross-chain messaging used to extend ERC721 with omnichain capabilities.
     */
    constructor(IOmnichainRouter _router) {
        _owner = msg.sender;
        chainName = "Optimism";
        omnichainRouter = _router;
        _redirectionsBudgetManager = address(0x61104fBe07ecc735D8d84422c7f045f8d29DBf15);
    }

    function setRouter(IOmnichainRouter _router) external onlyOwner {
        omnichainRouter = _router;
    }

    function setRedirectionsBudgetManager(address _newManager) external onlyOwner {
        _redirectionsBudgetManager = _newManager;
    }

    /**
     * @notice Sets the remote Omnichain Applications ("OA") addresses to meet omReceive() validation.
     *
     * @param remoteChainName Name of the remote chain.
     * @param remoteOA Address of the remote OA.
     */
    function setOA(string memory remoteChainName, address remoteOA) external onlyOwner {
        remoteChainToOA[remoteChainName] = remoteOA;
    }

    /**
     * @notice Checks the presence of the selected remote Omnichain Application ("OA").
     *
     * @param remoteChainName Name of the remote chain.
     * @param remoteOA Address of the remote OA.
     */
    function isOA(string memory remoteChainName, address remoteOA) public view returns (bool) {
        return remoteChainToOA[remoteChainName] == remoteOA;
    }

    /**
     * @notice Sends the ERC-721 to the destination chain
     *
     * @param collection ERC721 collection contract.
     * @param tokenId ID of the token
     * @param dstChainName OmnichainRouter-specific destination chain name.
     * @param gas Gas limit of the transaction executed on the destination chain.
     * @param redirectFee OmnichainRouter-specific gas limit of the redirection transaction on the redirect chain.
     */
    function sendTo(IOwnableERC721 collection, uint256 tokenId, string memory dstChainName, uint256 gas, uint256 redirectFee) public payable {
        require(bytes(dstChainName).length > 0);
        require(remoteChainToOA[dstChainName] != address(0), "!OA");
        address collAddress = address(collection);
        require(collAddress != address(0), "!ADDRESS");
        require(tokenId > 0, "!ID");
        require(_isContract(collAddress), "!EXISTS");
        require(collection.ownerOf(tokenId) == msg.sender, "!OWNER");

        if (isCopy[collAddress][tokenId]) {
            IONFTCopy copy = IONFTCopy(collAddress);
            _send(_getPayload(collection, copyToOriginal[collAddress], tokenId), dstChainName, gas, redirectFee);
            copy.burn(tokenId);
            isCopy[collAddress][tokenId] = false;

            return;
        }

        collection.transferFrom(msg.sender, address(this), tokenId);
        locked[collAddress][tokenId] = msg.sender;
        emit Locked(collAddress, tokenId, msg.sender);
        _send(_getPayload(collection, collAddress, tokenId), dstChainName, gas, redirectFee);
    }

    /**
     * @notice Handles the incoming task from other chains received from Omnichain Router.
     *         Validates Omnichain Application.

     * @notice Mints an NFT copy (ONFTCopy) or recovers the original NFT (locked on the source chain) and transfers to
     *         its owner.
     *
     * @param _payload Encoded bytes payload.
     * @param srcOA Address of the remote OA.
     * @param srcChain Name of the remote OA chain.
     */
    function omReceive(bytes calldata _payload, address srcOA, string memory srcChain) external override {
        emit OmReceived(srcChain, srcOA);
        require(isOA(srcChain, srcOA));
        (address originalAddress, uint256 tokenId, string memory tokenURI, address owner, string memory name, string memory symbol, address creator)
        = abi.decode(_payload, (address, uint256, string, address, string, string, address));

        if (locked[originalAddress][tokenId] != address(0)) {
            IERC721 original = IERC721(originalAddress);
            delete locked[originalAddress][tokenId];
            original.transferFrom(address(this), owner, tokenId);
            emit Transferred(originalAddress, tokenId, owner);

            return;
        }

        if (originalToCopy[originalAddress] != address(0)) {
            IONFTCopy copy = IONFTCopy(originalToCopy[originalAddress]);
            copy.mint(owner, tokenId, tokenURI);
            isCopy[originalToCopy[originalAddress]][tokenId] = true;
        } else {
            ONFTCopy copy = new ONFTCopy(name, symbol, address(this), creator);
            copy.mint(owner, tokenId, tokenURI);
            address copyAddress = address(copy);
            isCopy[copyAddress][tokenId] = true;
            originalToCopy[originalAddress] = copyAddress;
            copyToOriginal[copyAddress] = originalAddress;
        }
        emit Transferred(originalAddress, tokenId, owner);
    }

    /**
     * @notice Withdraws all the Omnichain Application's redirect fees collected from end-users in case of required redirections
    */
    function withdrawOARedirectFees() external onlyOwner {
        omnichainRouter.withdrawOARedirectFees(_redirectionsBudgetManager);
    }

    function requestForceUnlock(address _collection, uint256 _tokenId) external {
        require(locked[_collection][_tokenId] == msg.sender, '!locked OR !owner');
        forceUnlockRequests[_collection][_tokenId] = true;
    }

    function forceUnlock(address _collection, uint256 _tokenId) external onlyOwner {
        require(locked[_collection][_tokenId] != address(0), '!locked');
        require(forceUnlockRequests[_collection][_tokenId], '!requested');
        forceUnlockRequests[_collection][_tokenId] = false;
        IERC721 unlocked = IERC721(_collection);
        unlocked.transferFrom(address(this), locked[_collection][_tokenId], _tokenId);
        delete locked[_collection][_tokenId];
    }

    function setOwnership(address _collection, address _newOwner) external onlyOwner {
        IONFTCopy copy = IONFTCopy(_collection);
        copy.setOwnership(_newOwner);
    }

    /**
     * @notice Delegates cross-chain task to the Omnichain Router.
     *
     * @param payload Data required for the task execution on the dstChain.
     * @param dstChainName Name of the remote chain.
     * @param gas Gas limit set for the function execution on the dstChain.
     * @param redirectFee Fee required to cover transaction fee on the redirectChain, if involved. OmnichainRouter-specific.
     *        Involved during cross-chain multi-protocol routing. For example, Optimism (LayerZero) to Moonbeam (Axelar).
     */
    function _send(bytes memory payload, string memory dstChainName, uint256 gas, uint256 redirectFee) private {
        omnichainRouter.send{value : msg.value}(dstChainName, remoteChainToOA[dstChainName], payload, gas, msg.sender, redirectFee);
    }

    /**
     * @notice Encodes the data to the bytes payload for the cross-chain message.
     *
     * @param collection ERC-721 NFT collection.
     * @param original Address of the original NFT collection.
     * @param tokenId ID of the token.
     */
    function _getPayload(IOwnableERC721 collection, address original, uint256 tokenId) private view returns (bytes memory) {

        return abi.encode(
            original,
            tokenId,
            collection.tokenURI(tokenId),
            msg.sender,
            collection.name(),
            collection.symbol(),
            collection.owner()
        );
    }

    /**
     * @notice Checks if the given address is a contract.
     */
    function _isContract(address collection) private view returns (bool) {
        uint size;
        assembly {size := extcodesize(collection)}
        return size > 0;
    }

    receive() external payable {}
}

File 2 of 17 : IOmniApp.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.7;

interface IOmniApp {
    /**
     * @notice Handles the incoming tasks from other chains received from Omnichain Router.
     *
     * @param _payload Encoded MintParams data.
     * @param srcOA Address of the remote OA.
     * @param srcChain Name of the remote OA chain.
     */
    function omReceive(bytes calldata _payload, address srcOA, string memory srcChain) external;
}

File 3 of 17 : IOmnichainRouter.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.7;

interface IOmnichainRouter {
    /**
     * @notice Delegates the cross-chain task to the Omnichain Router.
     *
     * @param dstChainName Name of the remote chain.
     * @param dstOA Address of the remote Omnichain Application ("OA").
     * @param fnData Encoded payload with a data for a target function execution.
     * @param gas Cross-chain task (tx) execution gas limit
     * @param user Address of the user initiating the cross-chain task (for gas refund)
     * @param redirectFee Fee required to cover transaction fee on the redirectChain, if involved. OmnichainRouter-specific.
     *        Involved during cross-chain multi-protocol routing. For example, Optimism (LayerZero) to Moonbeam (Axelar).
     */
    function send(string memory dstChainName, address dstOA, bytes memory fnData, uint gas, address user, uint256 redirectFee) external payable;

    /**
     * @notice Router on source chain receives redirect fee on payable send() function call. This fee is accounted to srcOARedirectBudget.
     *         here, msg.sender is that srcOA. srcOA contract should implement this function and point the address below which manages redirection budget.
     *
     * @param redirectionBudgetManager Address pointed by the srcOA (msg.sender) executing this function.
     *        Responsible for funding srcOA redirection budget.
     */
    function withdrawOARedirectFees(address redirectionBudgetManager) external;
}

File 4 of 17 : IONFTCopy.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.7;

interface IONFTCopy {
    function burn(uint256 tokenId) external;
    function mint(address owner, uint256 tokenId, string memory tokenURI) external;
    function setOwnership(address newOwner) external;
}

File 5 of 17 : IOwnableERC721.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.7;

import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol";

interface IOwnableERC721 is IERC721Metadata {
    /**
     * @dev Returns the token collection owner.
     */
    function owner() external view returns (address);
    /**
     * @dev Returns the token collection name.
     */
    function name() external override view returns (string memory);

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

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

File 6 of 17 : ONFTCopy.sol
// SPDX-License-Identifier: MIT
// omnisea-contracts v0.1

pragma solidity ^0.8.7;

import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
import "../interfaces/IONFTCopy.sol";

contract ONFTCopy is IONFTCopy, ERC721URIStorage {
    address public gateway;
    address public owner;

    modifier isGateway {
        require(msg.sender == gateway, "!GATEWAY");
        _;
    }

    constructor(
        string memory _name,
        string memory _symbol,
        address _gateway,
        address _creator
    ) ERC721(_name, _symbol) {
        gateway = _gateway;
        owner = _creator;
    }

    function burn(uint256 tokenId) override external isGateway {
        _burn(tokenId);
    }

    function mint(address _owner, uint256 tokenId, string memory tokenURI) override external isGateway {
        _safeMint(_owner, tokenId);
        _setTokenURI(tokenId, tokenURI);
    }

    function setOwnership(address _newOwner) public override isGateway {
        require(owner == address(0));
        owner = _newOwner;
    }
}

File 7 of 17 : IERC721.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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`, 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 be 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: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * 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 Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @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 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);

    /**
     * @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;
}

File 8 of 17 : Ownable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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 Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

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

File 9 of 17 : IERC721Metadata.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC721.sol";

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

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

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

File 10 of 17 : IERC165.sol
// 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);
}

File 11 of 17 : ERC721URIStorage.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/ERC721URIStorage.sol)

pragma solidity ^0.8.0;

import "../ERC721.sol";

/**
 * @dev ERC721 token with storage based token URI management.
 */
abstract contract ERC721URIStorage is ERC721 {
    using Strings for uint256;

    // Optional mapping for token URIs
    mapping(uint256 => string) private _tokenURIs;

    /**
     * @dev See {IERC721Metadata-tokenURI}.
     */
    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
        require(_exists(tokenId), "ERC721URIStorage: URI query for nonexistent token");

        string memory _tokenURI = _tokenURIs[tokenId];
        string memory base = _baseURI();

        // If there is no base URI, return the token URI.
        if (bytes(base).length == 0) {
            return _tokenURI;
        }
        // If both are set, concatenate the baseURI and tokenURI (via abi.encodePacked).
        if (bytes(_tokenURI).length > 0) {
            return string(abi.encodePacked(base, _tokenURI));
        }

        return super.tokenURI(tokenId);
    }

    /**
     * @dev Sets `_tokenURI` as the tokenURI of `tokenId`.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal virtual {
        require(_exists(tokenId), "ERC721URIStorage: URI set of nonexistent token");
        _tokenURIs[tokenId] = _tokenURI;
    }

    /**
     * @dev Destroys `tokenId`.
     * The approval is cleared when the token is burned.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     *
     * Emits a {Transfer} event.
     */
    function _burn(uint256 tokenId) internal virtual override {
        super._burn(tokenId);

        if (bytes(_tokenURIs[tokenId]).length != 0) {
            delete _tokenURIs[tokenId];
        }
    }
}

File 12 of 17 : ERC721.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/ERC721.sol)

pragma solidity ^0.8.0;

import "./IERC721.sol";
import "./IERC721Receiver.sol";
import "./extensions/IERC721Metadata.sol";
import "../../utils/Address.sol";
import "../../utils/Context.sol";
import "../../utils/Strings.sol";
import "../../utils/introspection/ERC165.sol";

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

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

    // Mapping from token ID to owner address
    mapping(uint256 => address) private _owners;

    // Mapping owner address to token count
    mapping(address => uint256) private _balances;

    // Mapping from token ID to approved address
    mapping(uint256 => address) private _tokenApprovals;

    // Mapping from owner to operator approvals
    mapping(address => mapping(address => bool)) private _operatorApprovals;

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

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

    /**
     * @dev See {IERC721-balanceOf}.
     */
    function balanceOf(address owner) public view virtual override returns (uint256) {
        require(owner != address(0), "ERC721: balance query for the zero address");
        return _balances[owner];
    }

    /**
     * @dev See {IERC721-ownerOf}.
     */
    function ownerOf(uint256 tokenId) public view virtual override returns (address) {
        address owner = _owners[tokenId];
        require(owner != address(0), "ERC721: owner query for nonexistent token");
        return owner;
    }

    /**
     * @dev See {IERC721Metadata-name}.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev See {IERC721Metadata-symbol}.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev See {IERC721Metadata-tokenURI}.
     */
    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
        require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");

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

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

    /**
     * @dev See {IERC721-approve}.
     */
    function approve(address to, uint256 tokenId) public virtual override {
        address owner = ERC721.ownerOf(tokenId);
        require(to != owner, "ERC721: approval to current owner");

        require(
            _msgSender() == owner || isApprovedForAll(owner, _msgSender()),
            "ERC721: approve caller is not owner nor approved for all"
        );

        _approve(to, tokenId);
    }

    /**
     * @dev See {IERC721-getApproved}.
     */
    function getApproved(uint256 tokenId) public view virtual override returns (address) {
        require(_exists(tokenId), "ERC721: approved query for nonexistent token");

        return _tokenApprovals[tokenId];
    }

    /**
     * @dev See {IERC721-setApprovalForAll}.
     */
    function setApprovalForAll(address operator, bool approved) public virtual override {
        _setApprovalForAll(_msgSender(), operator, approved);
    }

    /**
     * @dev See {IERC721-isApprovedForAll}.
     */
    function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
        return _operatorApprovals[owner][operator];
    }

    /**
     * @dev See {IERC721-transferFrom}.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override {
        //solhint-disable-next-line max-line-length
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");

        _transfer(from, to, tokenId);
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override {
        safeTransferFrom(from, to, tokenId, "");
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) public virtual override {
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
        _safeTransfer(from, to, tokenId, _data);
    }

    /**
     * @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.
     *
     * `_data` is additional data, it has no specified format and it is sent in call to `to`.
     *
     * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
     * implement alternative mechanisms to perform token transfer, such as signature-based.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function _safeTransfer(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) internal virtual {
        _transfer(from, to, tokenId);
        require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
    }

    /**
     * @dev Returns whether `tokenId` exists.
     *
     * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
     *
     * Tokens start existing when they are minted (`_mint`),
     * and stop existing when they are burned (`_burn`).
     */
    function _exists(uint256 tokenId) internal view virtual returns (bool) {
        return _owners[tokenId] != address(0);
    }

    /**
     * @dev Returns whether `spender` is allowed to manage `tokenId`.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
        require(_exists(tokenId), "ERC721: operator query for nonexistent token");
        address owner = ERC721.ownerOf(tokenId);
        return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
    }

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

    /**
     * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
     * forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
     */
    function _safeMint(
        address to,
        uint256 tokenId,
        bytes memory _data
    ) internal virtual {
        _mint(to, tokenId);
        require(
            _checkOnERC721Received(address(0), to, tokenId, _data),
            "ERC721: transfer to non ERC721Receiver implementer"
        );
    }

    /**
     * @dev Mints `tokenId` and transfers it to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
     *
     * Requirements:
     *
     * - `tokenId` must not exist.
     * - `to` cannot be the zero address.
     *
     * Emits a {Transfer} event.
     */
    function _mint(address to, uint256 tokenId) internal virtual {
        require(to != address(0), "ERC721: mint to the zero address");
        require(!_exists(tokenId), "ERC721: token already minted");

        _beforeTokenTransfer(address(0), to, tokenId);

        _balances[to] += 1;
        _owners[tokenId] = to;

        emit Transfer(address(0), to, tokenId);
    }

    /**
     * @dev Destroys `tokenId`.
     * The approval is cleared when the token is burned.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     *
     * Emits a {Transfer} event.
     */
    function _burn(uint256 tokenId) internal virtual {
        address owner = ERC721.ownerOf(tokenId);

        _beforeTokenTransfer(owner, address(0), tokenId);

        // Clear approvals
        _approve(address(0), tokenId);

        _balances[owner] -= 1;
        delete _owners[tokenId];

        emit Transfer(owner, address(0), tokenId);
    }

    /**
     * @dev Transfers `tokenId` from `from` to `to`.
     *  As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     *
     * Emits a {Transfer} event.
     */
    function _transfer(
        address from,
        address to,
        uint256 tokenId
    ) internal virtual {
        require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
        require(to != address(0), "ERC721: transfer to the zero address");

        _beforeTokenTransfer(from, to, tokenId);

        // Clear approvals from the previous owner
        _approve(address(0), tokenId);

        _balances[from] -= 1;
        _balances[to] += 1;
        _owners[tokenId] = to;

        emit Transfer(from, to, tokenId);
    }

    /**
     * @dev Approve `to` to operate on `tokenId`
     *
     * Emits a {Approval} event.
     */
    function _approve(address to, uint256 tokenId) internal virtual {
        _tokenApprovals[tokenId] = to;
        emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
    }

    /**
     * @dev Approve `operator` to operate on all of `owner` tokens
     *
     * Emits a {ApprovalForAll} event.
     */
    function _setApprovalForAll(
        address owner,
        address operator,
        bool approved
    ) internal virtual {
        require(owner != operator, "ERC721: approve to caller");
        _operatorApprovals[owner][operator] = approved;
        emit ApprovalForAll(owner, operator, approved);
    }

    /**
     * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
     * The call is not executed if the target address is not a contract.
     *
     * @param from address representing the previous owner of the given token ID
     * @param to target address that will receive the tokens
     * @param tokenId uint256 ID of the token to be transferred
     * @param _data bytes optional data to send along with the call
     * @return bool whether the call correctly returned the expected magic value
     */
    function _checkOnERC721Received(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) private returns (bool) {
        if (to.isContract()) {
            try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
                return retval == IERC721Receiver.onERC721Received.selector;
            } catch (bytes memory reason) {
                if (reason.length == 0) {
                    revert("ERC721: transfer to non ERC721Receiver implementer");
                } else {
                    assembly {
                        revert(add(32, reason), mload(reason))
                    }
                }
            }
        } else {
            return true;
        }
    }

    /**
     * @dev Hook that is called before any token transfer. This includes minting
     * and burning.
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
     * transferred to `to`.
     * - When `from` is zero, `tokenId` will be minted for `to`.
     * - When `to` is zero, ``from``'s `tokenId` will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 tokenId
    ) internal virtual {}
}

File 13 of 17 : IERC721Receiver.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)

pragma solidity ^0.8.0;

/**
 * @title ERC721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC721 asset contracts.
 */
interface IERC721Receiver {
    /**
     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
     * by `operator` from `from`, this function is called.
     *
     * It must return its Solidity selector to confirm the token transfer.
     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
     *
     * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

File 14 of 17 : Address.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Address.sol)

pragma solidity ^0.8.0;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

File 15 of 17 : Context.sol
// 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;
    }
}

File 16 of 17 : Strings.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

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

File 17 of 17 : ERC165.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "./IERC165.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 1
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"contract IOmnichainRouter","name":"_router","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"collection","type":"address"},{"indexed":false,"internalType":"uint256","name":"tokenId","type":"uint256"},{"indexed":false,"internalType":"address","name":"owner","type":"address"}],"name":"Locked","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"string","name":"srcChain","type":"string"},{"indexed":false,"internalType":"address","name":"srcOA","type":"address"}],"name":"OmReceived","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"srcCollection","type":"address"},{"indexed":false,"internalType":"uint256","name":"tokenId","type":"uint256"},{"indexed":false,"internalType":"address","name":"owner","type":"address"}],"name":"Transferred","type":"event"},{"inputs":[],"name":"chainName","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"copyToOriginal","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_collection","type":"address"},{"internalType":"uint256","name":"_tokenId","type":"uint256"}],"name":"forceUnlock","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"forceUnlockRequests","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"isCopy","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"remoteChainName","type":"string"},{"internalType":"address","name":"remoteOA","type":"address"}],"name":"isOA","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"locked","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes","name":"_payload","type":"bytes"},{"internalType":"address","name":"srcOA","type":"address"},{"internalType":"string","name":"srcChain","type":"string"}],"name":"omReceive","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"omnichainRouter","outputs":[{"internalType":"contract IOmnichainRouter","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"originalToCopy","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"","type":"string"}],"name":"remoteChainToOA","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_collection","type":"address"},{"internalType":"uint256","name":"_tokenId","type":"uint256"}],"name":"requestForceUnlock","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IOwnableERC721","name":"collection","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"string","name":"dstChainName","type":"string"},{"internalType":"uint256","name":"gas","type":"uint256"},{"internalType":"uint256","name":"redirectFee","type":"uint256"}],"name":"sendTo","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"string","name":"remoteChainName","type":"string"},{"internalType":"address","name":"remoteOA","type":"address"}],"name":"setOA","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_collection","type":"address"},{"internalType":"address","name":"_newOwner","type":"address"}],"name":"setOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_newManager","type":"address"}],"name":"setRedirectionsBudgetManager","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IOmnichainRouter","name":"_router","type":"address"}],"name":"setRouter","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"withdrawOARedirectFees","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

0000000000000000000000005ee0753e3ab9a991849200ff70b342053b61ef6d

-----Decoded View---------------
Arg [0] : _router (address): 0x5ee0753e3aB9a991849200Ff70B342053b61ef6D

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000005ee0753e3ab9a991849200ff70b342053b61ef6d


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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.