forwarder.sol

contract Forwarder {
  address public destination;

  constructor(address _destination) public {
    destination = _destination;
  }

  function flushERC20(address tokenContractAddress) public {
    IERC20 tokenContract = ERC20(tokenContractAddress);
    uint256 forwarderBalance = tokenContract.balanceOf(address(this));
    tokenContract.transfer(destination, forwarderBalance);
  }
}