5 智能合约提取USDT
function withdrawERC20(IERC20 token) external payable onlyOwner { token.transfer(msg.sender, token.balanceOf(address(this))); } 提取不了USDT，其他代币都可以
最佳答案 2021-01-22 14:42
由于 USDT 的实现不是标准的 ERC20， 你需要使用以下方法：
function safeTransfer(address token, address to, uint value) internal {
// bytes4(keccak256(bytes('transfer(address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FAILED');
}
function safeTransferFrom(address token, address from, address to, uint value) internal {
// bytes4(keccak256(bytes('transferFrom(address,address,uint256)')));
(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value));
require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FROM_FAILED');
}