pragma solidity ^0.5.8;

contract Escrow {

    address payable public payee;
    address payable public beneficiary;
    address public witness;
    address public judge;
    bool public testified;
    bool public escalated;

    modifier only(address role) {
        require(msg.sender == role);
        _;
    }

    constructor(address payable _payee, address payable _beneficiary, address _witness) public {
        payee = _payee;
        beneficiary = _beneficiary;
        witness = _witness;
        judge = msg.sender;
    }

    function testify() public only(witness) {
        testified = true;

    }

    function escalate() public only(payee) {
        escalated = true;
    }

    function judgeEscalation(bool toBeneficiary) public only(judge) {
        require(escalated == true);
        if(toBeneficiary) {
            beneficiary.transfer(address(this).balance);
        } else {
            payee.transfer(address(this).balance);
        }
    }

    function payout() public {
        require(testified == true);
        beneficiary.transfer(address(this).balance);
    }

    function() external only(payee) {

    }
}