Contract Source Code (Solidity Standard Json-Input format)

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// SPDX-License-Identifier: UNLICENSED

pragma solidity 0.8.17;

import "../../interfaces/tokens/IERC721.sol";
import "../../interfaces/tokens/IERC1155.sol";

library X2Y2Market {

    address public constant _x2y2 = 0x74312363e45DCaBA76c59ec49a7Aa8A65a67EeD3;  // Ethereum Mainnet

    struct TradeDataX2Y2{
        bytes data;
        uint256 value;
        address addr;
        uint256 tokenId;
        string ercType;
    }
    event Log(string message);
    event LogBytes(bytes4 message);

    function execute(bytes memory tradeData) public {
        TradeDataX2Y2 memory params = abi.decode(tradeData, (TradeDataX2Y2));

        if (params.data[0] == 0x35 &&
            params.data[1] == 0x7a &&
            params.data[2] == 0x15 &&
            params.data[3] == 0x0b ) {

            (bool success,) = _x2y2.call{value: params.value}(params.data);

            if(success && keccak256(abi.encodePacked(params.ercType)) == keccak256(abi.encodePacked('erc721'))){
                IERC721(params.addr).transferFrom(
                    address(this),
                    msg.sender,
                    params.tokenId
                );
            } else if (success && keccak256(abi.encodePacked(params.ercType)) == keccak256(abi.encodePacked('erc1155'))){
                IERC1155(params.addr).safeTransferFrom(
                    address(this),
                    msg.sender,
                    params.tokenId,
                    1,
                    ""
                );
            }

        } else {
            revert("Invalid method.");
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.17;

interface IERC1155 {
    function safeTransferFrom(
        address from,
        address to,
        uint256 id,
        uint256 amount,
        bytes memory data
    ) external;

    function safeBatchTransferFrom(
        address from,
        address to,
        uint256[] memory ids,
        uint256[] memory amounts,
        bytes memory data
    ) external;

    function balanceOf(address _owner, uint256 _id) external view returns (uint256);
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.17;

interface IERC721 {
    /// @notice Transfer ownership of an NFT -- THE CALLER IS RESPONSIBLE
    ///  TO CONFIRM THAT `_to` IS CAPABLE OF RECEIVING NFTS OR ELSE
    ///  THEY MAY BE PERMANENTLY LOST
    /// @dev Throws unless `msg.sender` is the current owner, an authorized
    ///  operator, or the approved address for this NFT. Throws if `_from` is
    ///  not the current owner. Throws if `_to` is the zero address. Throws if
    ///  `_tokenId` is not a valid NFT.
    /// @param _from The current owner of the NFT
    /// @param _to The new owner
    /// @param _tokenId The NFT to transfer
    function transferFrom(address _from, address _to, uint256 _tokenId) external payable;

    function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory _data) external;

    function setApprovalForAll(address operator, bool approved) external;

    function approve(address to, uint256 tokenId) external;

    function isApprovedForAll(address owner, address operator) external view returns (bool);

    function balanceOf(address _owner) external view returns (uint256);
}

{
  "optimizer": {
    "enabled": true,
    "runs": 10000
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

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[{"anonymous":false,"inputs":[{"indexed":false,"internalType":"string","name":"message","type":"string"}],"name":"Log","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bytes4","name":"message","type":"bytes4"}],"name":"LogBytes","type":"event"},{"inputs":[],"name":"_x2y2","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"}]

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