contract paymentContract {

    using SafeMath for uint256;

    address operatingAddress;
    address coldStorage;

    uint public opThreshold;
    
///@author Arq
///@notice Constructor function determines the payment parties and threshold.
///@param _operatingAddress - The Address that will be refilled by payments to this contract.
///@param _coldStorage - The Address of the Cold Storage wallet, where overflow funds are sent.
///@param _threshold - The level to which this contract will replenish the funds in the operatingAddress wallet.
    constructor(address _operatingAddress, address _coldStorage, uint _threshold) public {
        operatingAddress = _operatingAddress;
        coldStorage = _coldStorage;
        opThreshold = _threshold * 1 ether;
    }
///@author Arq
///@notice The Fallback Function that accepts payments.
///@dev Contract can be used as a payment source.
    function () public payable {
        distribute();
    }

    ///@author Arq
    ///@notice Function that sends funds to either Cold Storage, Operating Address, or both based on the Operating Threshold.
    ///@dev opThreshold determines what the balance in the operatingAddress should be, at a minimum.
        function distribute() internal {
            if(operatingAddress.balance < opThreshold) {
                if(address(this).balance < (opThreshold - operatingAddress.balance)){
                    operatingAddress.transfer(address(this).balance);
                } else {
                    operatingAddress.transfer(opThreshold - operatingAddress.balance);
                    coldStorage.transfer(address(this).balance);
                }
            } else {
                coldStorage.transfer(address(this).balance);
            }
        }
}
///@title Dremabridge Payment contract
///@author Arq
///@notice Simple payment contract that checks an address for an "Operating Threshold" which is a set balance of ether, the remaining balance to another Address called Cold Storage.
function () public payable {
    distribute();
}

///@author Arq
///@notice The Fallback Function that accepts payments.
///@dev Contract can be used as a payment source.