Solidity合约标准----ERC721

ERC721

非同质化token，它依赖于ERC-165

ERC721 快速体验

参照官方提供的案例，直接部署到remix，自动下载依赖 https://docs.openzeppelin.com/contracts/4.x/erc721

// contracts/GameItem.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

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

// ERC721: 0x80ac58cd
//ERC165: 0x01ffc9a7
contract GameItem is ERC721URIStorage {
   //NFT 实质:  address==>tokenId
    using Counters for Counters.Counter;
    Counters.Counter private _tokenIds;

   //NFT name，NFT简写
    constructor() ERC721("ZhongYuanUniversity", "ZUT") {}

   //白名单 player---》你的地址  tokenURI---》URL
    function awardItem(address player, string memory tokenURI)
        public
        returns (uint256)
    {
        //获取当前的tokenID
        uint256 newItemId = _tokenIds.current();
        
        //铸造NFT  (地址---》数字tokenID)
        _mint(player, newItemId);
        //设置token相关信息
        _setTokenURI(newItemId, tokenURI);
        //tokenid自增，防止重复
        _tokenIds.increment();
        return newItemId;
    }
}