Merge pull request #753 from xiangnuans/task3

Task3：xiangnuans

members/xiangnuans/readme.md

@@ -17,5 +17,5 @@
 - 6年前端开发
 - 约1年的RN开发
 
-https://github.com/xiangnuans?tab=repositories&type=source
+https://github.com/xiangnuans
 

members/xiangnuans/task3/NFTMarket.sol

@@ -0,0 +1,88 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.20;
+
+import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
+import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
+
+contract NFTMarket {
+    struct Listing {
+        address seller;
+        address nftContract;
+        uint256 tokenId;
+        uint256 price;
+        bool isActive;
+    }
+
+    mapping(address => mapping(uint256 => Listing)) public listings;
+    IERC20 public paymentToken;
+
+    event NFTListed(
+        address indexed seller,
+        address indexed nftContract,
+        uint256 indexed tokenId,
+        uint256 price
+    );
+    event NFTBought(
+        address indexed buyer,
+        address indexed nftContract,
+        uint256 indexed tokenId,
+        uint256 price
+    );
+
+    constructor(IERC20 _paymentToken) {
+        paymentToken = IERC20(_paymentToken);
+    }
+
+    function listNFT(
+        address _nftContract,
+        uint256 _tokenId,
+        uint256 _price
+    ) external {
+        IERC721 nft = IERC721(_nftContract);
+        require(
+            nft.ownerOf(_tokenId) == msg.sender,
+            "Not the owner of the NFT"
+        );
+        // require(
+        //     nft.isApprovedForAll(msg.sender, address(this)),
+        //     "Contract not approved"
+        // );
+        require(
+            nft.getApproved(_tokenId) == address(this),
+            "Contract not approved"
+        );
+
+        listings[_nftContract][_tokenId] = Listing(
+            msg.sender,
+            _nftContract,
+            _tokenId,
+            _price,
+            true
+        );
+        emit NFTListed(msg.sender, _nftContract, _tokenId, _price);
+    }
+
+    function getAllListings() external view returns (Listing[] memory) {
+        return listings;
+    }
+
+    function buyNFT(uint256 index) external {
+        Listing storage listing = listings[index];
+        require(listing.price > 0, "NFT not for sale");
+
+        IERC721 nft = IERC721(_nftContract);
+        require(
+            paymentToken.transferFrom(
+                msg.sender,
+                listing.seller,
+                listing.price
+            ),
+            "Payment failed"
+        );
+
+        nft.safeTransferFrom(listing.seller, msg.sender, _tokenId);
+        listing.isActive = false;
+
+        emit NFTBought(msg.sender, _nftContract, _tokenId, listing.price);
+    }
+}

members/xiangnuans/task3/README.md

@@ -0,0 +1,46 @@
+# Sample Hardhat Project
+
+This project demonstrates a basic Hardhat use case. It comes with a sample contract, a test for that contract, and a Hardhat Ignition module that deploys that contract.
+
+Try running some of the following tasks:
+
+```shell
+npx hardhat help
+npx hardhat test
+REPORT_GAS=true npx hardhat test
+npx hardhat node
+npx hardhat ignition deploy ./ignition/modules/Lock.ts
+```
+
+
+# 编写 NFTMarket 智能合约
+
+## 任务目标
+编写一个智能合约，实现一个简单的NFT市场功能，允许用户上架NFT并使用自己部署的ERC20代币进行购买。
+## 任务要求
+### 1.部署ERC20代币
+需要部署一个ERC20代币，用于NFT的购买。
+
+### 2.部署NFT
+需要部署NFT用于买卖
+
+### 3.上架NFT
+- 用户可以将自己的NFT上架到市场。
+- 上架时需要指定NFT的合约地址、Token ID以及价格（使用ERC20代币）。
+- 声明上架NFT事件
+
+### 4.购买NFT
+- 用户可以使用自己部署的ERC20代币购买上架的NFT。
+- 购买成功后，NFT转移给买家，卖家收到ERC20代币。
+- 声明购买NFT事件
+
+## 提交要求
+- 部署在Sepolia测试网上
+- 提交全部合约文件（ERC20、ERC721、NFTMarket）
+- 提交上架NFT、购买NFT的交易哈希
+
+
+- Contract MyToken deployed successfully: [0xC2F6FE1FCb070abE231CA0f9c2d148183740E4a8](https://sepolia.etherscan.io/address/0xC2F6FE1FCb070abE231CA0f9c2d148183740E4a8)
+- Contract MyNFT deployed successfully: [0x4ECEd2DEAfC38a647675F650c8ee0abbc52Db26e](https://sepolia.etherscan.io/address/0x4ECEd2DEAfC38a647675F650c8ee0abbc52Db26e)
+- Contract NFTMarket deployed successfully: [0x53b72dE55e80B4569EfDA5C96393b26FBDd27eF8](https://sepolia.etherscan.io/address/0x53b72dE55e80B4569EfDA5C96393b26FBDd27eF8)
+- Purchase NFT's transaction hash: [0x60ee944f5619c5f7d1315f2d7e0cafb0f354f4a8dd3cf295709232415da08085](https://sepolia.etherscan.io/tx/0x60ee944f5619c5f7d1315f2d7e0cafb0f354f4a8dd3cf295709232415da08085)

members/xiangnuans/task3/myNFT.sol

@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
+
+contract MyNFT is ERC721URIStorage {
+    uint256 private _tokenIds;
+
+    constructor() ERC721("MyNFT", "MNFT") {}
+
+    function mint(
+        address recipient,
+        string memory tokenURI
+    ) public returns (uint256) {
+        _tokenIds++;
+        uint256 newTokenId = _tokenIds;
+        _mint(recipient, newTokenId);
+        _setTokenURI(newTokenId, tokenURI);
+        return newTokenId;
+    }
+}

members/xiangnuans/task3/myToken.sol

@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.20;
+
+import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
+
+contract MyToken is ERC20 {
+    constructor(uint256 initialSupply) ERC20("MyToken", "MTK") {
+        _mint(msg.sender, initialSupply * 10 ** uint(decimals()));
+    }
+}