    function withdrawEther(address traderAddr, address payable withdrawalAddr, uint amount) external
        onlyActive()
        onlyApprovedExchange(traderAddr) {
        deductBalance(0, traderAddr, amount);
        resetEmergencyRelease(traderAddr);
        emit Withdrawal(0, traderAddr, withdrawalAddr, amount);
        withdrawalAddr.transfer(amount);
    }