pragma solidity 0.8.7;
contract A{
    address public destination;
    uint256 public number;
    function convertA() external{
        (bool su,bytes memory ret )= address(this).call(abi.encodeWithSelector(this.ret.selector));
        number = ret.length;
        destination = abi.decode(ret, (address));
    }
    function ret() public returns(bytes memory){
        return "0x74d754378a59Ab45d3E6CaC83f0b87E8E8719270";
    }
}
function _sendFee(address lookup_, bytes4 selector_, uint256 amount_) internal returns (bool success_) {
    if (amount_ == uint256(0)) return true;

    ( bool success , bytes memory data ) = lookup_.call(abi.encodeWithSelector(selector_));

+       if (!success || data.length != uint256(32)) return false;

    address destination = abi.decode(data, (address));

    if (destination == address(0)) return false;

    return ERC20Helper.transfer(_fundsAsset, destination, amount_);
}
