我如何接受ERC20代币进行NFT薄荷付款而不是ETH

Question

我如何接受ERC 20代币，以根据我的智能合约铸造NFT。我目前正在使用ETH支付铸造，我想接受另一个ERC 20代币。

Answer 1

您可以更改薄荷功能，以接受首选的令牌类型作为付款。为了防止在ETH中支付天然气，您可以使用双科性前进。检查他们的文档。
https://docs.biconomy.io.io/products/enable-products/enable-pareing-product-product-product--product--enable-poaying--煤气中心20

Answer 2

您需要从NFT合同到令牌合同的参考。
假设我们有这两个合同：NFTContract，Tokencontract。

 contract NFTContract {
  TokenContract tokenContract;
  ...
   mint() {
   tokensContract.transfer(msg.sender(), addressReceiver, tokensToSend);
   ...
  }
 }

 contract TokenContract {
  transfer(sender, receiver, balance) {}
 }

您可以检查一个示例，说明我是在为论文开发的回购中如何做到这一点的。
https://github.com/nickvanzo/nickvanzo/contracts_for_thesis

Answer 3

也许它对您有用，但要小心您可能会因坚固版本而犯错误。

pragma solidity ^0.8.9;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Burnable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";

contract LSTNFT is ERC721, ERC721Burnable, Ownable {

    uint256 public cost;
    uint256  maxSupply = 20;
    uint256  maxMintAmountPerTx = 2;

    // address of the ERC-20 contract
    address public erc20Contract = "ERC-20 address is here";
    // instance of the ERC-20 contract
    ERC20 public erc20;

    constructor() ERC721("Lestonz NFT", "LSTN") {
        erc20 = ERC20(erc20Contract);
    }
    
    function _baseURI() internal pure override returns (string memory) {
        return "ipfs://your ipfs url";
    }
    modifier mintPriceCompliance(uint256 _mintAmount) {
        if (msg.sender != owner()) {
            require(msg.value >= cost * _mintAmount, 'Insufficient funds!');
        }
        _;
    }
    function mint(uint256 _mintAmount) public payable  mintPriceCompliance(_mintAmount) {
    require(erc20.balanceOf(msg.sender) >= msg.value, "Not enough ERC-20 tokens");
    _safeMint(_msgSender(), _mintAmount);
    }

      function setCost(uint256 _cost) public onlyOwner {
        cost = _cost;
        }
}