如何将我的IPFS内容链接到ERC721合同？

发布于 2025-02-11 13:51:40 字数 909 浏览 1 评论 0原文

我正在尝试签订简单的ERC721 NFT铸造合同。我创建了一个图像及其相应的元数据，并将它们上传到IPF。该图像和元数据何时与智能合约中创建的令牌链接？我试图使用与OpenZeppelin合同向导生成的此代码：

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Counters.sol";

contract MyToken is ERC721, Ownable {
    using Counters for Counters.Counter;

    Counters.Counter private _tokenIdCounter;

    constructor() ERC721("MyToken", "MTK") {}

    function safeMint(address to) public onlyOwner {
        uint256 tokenId = _tokenIdCounter.current();
        _tokenIdCounter.increment();
        _safeMint(to, tokenId);
    }
}

但是我看不到可以将NFT图像和元数据链接到合同的位置。我已经看到，在OpenZeppelin的ERC721 Standart中，您可以使用功能Tokenuri和_Baseuri设置基本URI和Tokenuri，但我不知道如何使用它们。我打算创建一个多项目集合（在IPF中），因此我不知道在我的情况下使用什么。

原文

I´m trying to make a simple ERC721 NFT minting contract. I created an image and its corresponding metadata and I´ve uploaded them to the ipfs. When does this image and metadata link with the token created in the smart contract?. I was trying to use this code generated with the Openzeppelin contract wizard:

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Counters.sol";

contract MyToken is ERC721, Ownable {
    using Counters for Counters.Counter;

    Counters.Counter private _tokenIdCounter;

    constructor() ERC721("MyToken", "MTK") {}

    function safeMint(address to) public onlyOwner {
        uint256 tokenId = _tokenIdCounter.current();
        _tokenIdCounter.increment();
        _safeMint(to, tokenId);
    }
}

But I don't see where I can link my nft image and metadata to the contract. I´ve seen that in ERC721 standart by openzeppelin you can set the base URI and tokenURI with the functions tokenURI and _baseURI, but I don't know exactly how to use them. I was planning to create a multiple-item collection (in the ipfs) so I don't know what to use in my case.

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鹿港小镇 2025-02-18 13:51:40

用ERC721URISTORAGE替换ERC721

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Counters.sol";

contract MyToken is ERC721URIStorage, Ownable {
    using Counters for Counters.Counter;

    Counters.Counter private _tokenIdCounter;

    constructor() ERC721("MyToken", "MTK") {}

    function safeMint(string memory tokenURI, address to) public onlyOwner {
        uint256 tokenId = _tokenIdCounter.current();
        _tokenIdCounter.increment();
        _safeMint(to, tokenId);
        _setTokenURI(tokenId, tokenURI);
    }
}

Replace ERC721 with ERC721URIStorage

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Counters.sol";

contract MyToken is ERC721URIStorage, Ownable {
    using Counters for Counters.Counter;

    Counters.Counter private _tokenIdCounter;

    constructor() ERC721("MyToken", "MTK") {}

    function safeMint(string memory tokenURI, address to) public onlyOwner {
        uint256 tokenId = _tokenIdCounter.current();
        _tokenIdCounter.increment();
        _safeMint(to, tokenId);
        _setTokenURI(tokenId, tokenURI);
    }
}

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