使用传输功能发送 ERC20 代币

Question

我是 solidity 编程的新手，我目前正在尝试运行 Remix 中的一个简单的智能合约，如下所示：

pragma solidity ^0.8.0;

import "github.com/OpenZeppelin/openzeppelin-contracts/contracts/token/ERC20/utils/SafeERC20.sol";

contract Swap  {
    address public owner;
    uint256 public balance;
    
    event TransferReceived(address _from, uint _amount);
    event TransferSent(address _from, address _destAddr, uint _amount);
    
    constructor() {
        owner = msg.sender;
    }
    
    receive() payable external {
        balance += msg.value;
        emit TransferReceived(msg.sender, msg.value);
    }    
    
    function withdraw(uint amount, address payable destAddr) public {
        require(msg.sender == owner, "Only owner can withdraw funds"); 
        require(amount <= balance, "Insufficient funds");
        
        destAddr.transfer(amount);
        balance -= amount;
        emit TransferSent(msg.sender, destAddr, amount);
    }
    
    function transferERC20(IERC20 token, address to, uint256 amount) public {
        require(msg.sender == owner, "Only owner can withdraw funds"); 
        uint256 erc20balance = token.balanceOf(address(this));
        require(amount <= erc20balance, "balance is low");
        token.transfer(to, amount);
        emit TransferSent(msg.sender, to, amount);
    }    
}

虽然我可以成功发送 BNB 并调用 withdraw 函数给出发送的值和我在 BSC 测试网中的钱包地址，但我在运行设置 transferERC20 功能。调用此方法时我得到的唯一输出是以下消息：

Gas estimation errored with the following message (see below). The transaction execution will likely fail. Do you want to force sending? Internal JSON-RPC error. { "code": -32000, "message": "execution reverted" }

我在 testnet.bscscan 网站上尝试了几个不同的 BNB 地址，同时确保合约有足够的资金用于转账，但我没有成功。

谁能告诉我 contract/setup 中可能出了什么问题？我是否正确进行了此转帐？

Answer 1

修复构造函数

constructor() {
      // payable allows payment of ether with a call.
      owner = payable(msg.sender);
  }

确保那些 require 语句得到满足

  require(msg.sender == owner, "Only owner can withdraw funds"); 
  require(amount <= balance, "Insufficient funds");

检查您是否连接到正确的网络

使用传输功能发送 ERC20 代币

Sending ERC20 tokens using the transfer function

cryptography

ethereum

solidity

smartcontracts

bsc