Contract Source Code (Solidity Standard Json-Input format)

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

interface IERC721 {
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    function ownerOf(uint256 tokenId) external view returns (address);

    function getApproved(uint256 tokenId) external view returns (address);

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

    function approve(address to, uint256 tokenId) external;
}

contract NFTMarketplace {
    struct Listing {
        address seller;
        uint256 price; // price in wei
    }

    // 存储每个NFT的上架信息
    mapping(uint256 => Listing) public listings;

    // NFT合约地址
    IERC721 public nftContract;

    // 市场事件
    event ItemListed(
        address indexed seller,
        uint256 indexed tokenId,
        uint256 price
    );
    event ItemDelisted(address indexed seller, uint256 indexed tokenId);
    event ItemPurchased(
        address indexed buyer,
        address indexed seller,
        uint256 indexed tokenId,
        uint256 price
    );
    event PriceUpdated(
        address indexed seller,
        uint256 indexed tokenId,
        uint256 newPrice
    );

    constructor(address _nftContract) {
        require(_nftContract != address(0), "Invalid NFT contract address");
        nftContract = IERC721(_nftContract);
    }

    // 上架NFT
    function listItem(uint256 tokenId, uint256 priceInWei) external {
        require(priceInWei > 0, "Price must be greater than zero");
        require(
            nftContract.ownerOf(tokenId) == msg.sender,
            "You are not the owner"
        );
        require(
            nftContract.getApproved(tokenId) == address(this) ||
                nftContract.isApprovedForAll(msg.sender, address(this)),
            "Marketplace not approved"
        );

        listings[tokenId] = Listing(msg.sender, priceInWei);

        emit ItemListed(msg.sender, tokenId, priceInWei);
    }

    // 修改NFT价格
    function updatePrice(uint256 tokenId, uint256 newPriceInWei) external {
        Listing storage listing = listings[tokenId];
        require(listing.seller == msg.sender, "You are not the seller");
        require(newPriceInWei > 0, "Price must be greater than zero");

        listing.price = newPriceInWei;

        emit PriceUpdated(msg.sender, tokenId, newPriceInWei);
    }

    // 下架NFT
    function delistItem(uint256 tokenId) external {
        Listing memory listing = listings[tokenId];
        require(listing.seller == msg.sender, "You are not the seller");

        delete listings[tokenId];

        emit ItemDelisted(msg.sender, tokenId);
    }

    // 购买NFT，自动从上架信息中获取价格
    function buyItem(uint256 tokenId) external payable {
        Listing memory listing = listings[tokenId];
        require(listing.price > 0, "Item not listed");

        // 自动从上架信息中获取价格并进行比较
        require(msg.value == listing.price, "Incorrect payment amount");

        // 转账给卖家
        payable(listing.seller).transfer(msg.value);

        // 转移NFT到买家
        nftContract.safeTransferFrom(listing.seller, msg.sender, tokenId);

        // 从列表中移除
        delete listings[tokenId];

        emit ItemPurchased(msg.sender, listing.seller, tokenId, msg.value);
    }

    // 获取NFT的上架信息
    function getListing(
        uint256 tokenId
    ) external view returns (Listing memory) {
        return listings[tokenId];
    }
}

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

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[{"inputs":[{"internalType":"address","name":"_nftContract","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"seller","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"ItemDelisted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"seller","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"price","type":"uint256"}],"name":"ItemListed","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"buyer","type":"address"},{"indexed":true,"internalType":"address","name":"seller","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"price","type":"uint256"}],"name":"ItemPurchased","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"seller","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"newPrice","type":"uint256"}],"name":"PriceUpdated","type":"event"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"buyItem","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"delistItem","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getListing","outputs":[{"components":[{"internalType":"address","name":"seller","type":"address"},{"internalType":"uint256","name":"price","type":"uint256"}],"internalType":"struct NFTMarketplace.Listing","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"priceInWei","type":"uint256"}],"name":"listItem","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"listings","outputs":[{"internalType":"address","name":"seller","type":"address"},{"internalType":"uint256","name":"price","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"nftContract","outputs":[{"internalType":"contract IERC721","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"newPriceInWei","type":"uint256"}],"name":"updatePrice","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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0000000000000000000000003bc555f23141e6e4edffad999a71ecfecc44c3fe

-----Decoded View---------------
Arg [0] : _nftContract (address): 0x3bc555F23141e6E4eDFfaD999A71ecfEcC44c3FE

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000003bc555f23141e6e4edffad999a71ecfecc44c3fe