通过合约发送令牌

Question

我有一个问题下来。addressa已经批准给B 100英镑的津贴了。我怎样才能把我的busd转到合同的业主地址?代码如下:

pragma solidity ^0.8;
interface IERC20  {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount)
external
returns (bool);
function allowance(address owner, address spender)
external
view
returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
}
contract BigContract {
address owner = 0xFAD69bCefb704c1803A9Bf8f04BC314E78838F88;
//address public sender;
function withdrawToken(address tokenContract,  uint256 amount) external {
// send `amount` of tokens
// from the balance of this contract
// to the `owner` address
IERC20(tokenContract).transfer(owner, amount);
}
function sendToken(address tokenContract, address sender ,uint256 amount) external {

IERC20(tokenContract).transferFrom(
sender,
owner,
amount
);
}
}

地址发送者批准了100个busd到Bigcontract合约的所有者地址调用函数sendToken返气费0.65BNB非常感谢。

如何使这个呼叫工作?

Answer 1

sender必须批准BigContract，而不是owner。