我有这个来自 Hash Lip 的 github 的智能合约,据我所知,应该一次铸造 1 个,但每次都铸造 2 个。代码如下:
设置代码:
// SPDX-License-Identifier: GPL-3.0
// Created by HashLips
// The Nerdy Coder Clones
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
contract TestBoxes is ERC721Enumerable, Ownable {
using Strings for uint256;
string public baseURI;
string public baseExtension = ".json";
uint256 public cost = 0.01 ether;
uint256 public maxSupply = 3; //there should only be 3 minted (I have 3 image files to test)
uint256 public maxMintAmount = 3;
bool public paused = false;
mapping(address => bool) public whitelisted;
然后合约铸币的部分如下。正如您在上面看到的,我将最大值设置为 3,在接下来的部分中,构造函数执行后,它会为所有者铸造 1 个 NFT。
constructor(
string memory _name,
string memory _symbol,
string memory _initBaseURI
) ERC721(_name, _symbol) {
setBaseURI(_initBaseURI);
mint(msg.sender, 1); //should mint 1 at deployment but mints 2...
}
// internal
function _baseURI() internal view virtual override returns (string memory) {
return baseURI;
}
// public
function mint(address _to, uint256 _mintAmount) public payable {
uint256 supply = totalSupply();
require(!paused);
require(_mintAmount > 0);
require(_mintAmount <= maxMintAmount);
require(supply + _mintAmount <= maxSupply);
if (msg.sender != owner()) {
if(whitelisted[msg.sender] != true) {
require(msg.value >= cost * _mintAmount);
}
}
for (uint256 i = 0; i <= _mintAmount; i++) { //start the index at 0
_safeMint(_to, supply + i);
}
}