Contract Source Code (Solidity Standard Json-Input format)

IDE

• Blockscan IDE
• 🤖 Code ReaderBeta

More Options

• Similar
• Submit Audit
• Compare

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";

contract NFTMarketplace {
    struct Listing {
        address seller;
        uint256 price;
    }

    // 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
    );

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

    // 上架NFT
    function listItem(uint256 tokenId, uint256 price) external {
        require(price > 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, price);

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

    // 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
    function buyItem(uint256 tokenId) external payable {
        Listing memory listing = listings[tokenId];
        require(listing.price > 0, "Item not listed");
        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];
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721
     * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must
     * understand this adds an external call which potentially creates a reentrancy vulnerability.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 tokenId) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool approved) external;

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts 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);
}

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

• No Contract Security Audit Submitted- Submit Audit Here

[{"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"},{"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":"price","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"}]

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