52 lines
1.8 KiB
Solidity
52 lines
1.8 KiB
Solidity
//contract token { mapping (address => uint) public coinBalanceOf; function token() {} function sendCoin(address receiver, uint amount) returns(bool sufficient) { } }
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contract Crowdsale {
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address public beneficiary;
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uint public fundingGoal; uint public amountRaised; uint public deadline; uint public price;
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token public tokenReward;
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Funder[] public funders;
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event FundTransfer(address backer, uint amount, bool isContribution);
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/* data structure to hold information about campaign contributors */
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struct Funder {
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address addr;
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uint amount;
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}
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/* at initialization, setup the owner */
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function Crowdsale(address _beneficiary, uint _fundingGoal, uint _duration, uint _price, token _reward) {
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beneficiary = _beneficiary;
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fundingGoal = _fundingGoal;
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deadline = now + _duration * 1 minutes;
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price = _price;
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tokenReward = token(_reward);
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}
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/* The function without name is the default function that is called whenever anyone sends funds to a contract */
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function () {
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uint amount = msg.value;
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funders[funders.length++] = Funder({addr: msg.sender, amount: amount});
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amountRaised += amount;
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tokenReward.sendCoin(msg.sender, amount / price);
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FundTransfer(msg.sender, amount, true);
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}
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modifier afterDeadline() { if (now >= deadline) _ }
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/* checks if the goal or time limit has been reached and ends the campaign */
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function checkGoalReached() afterDeadline {
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if (amountRaised >= fundingGoal){
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beneficiary.send(amountRaised);
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FundTransfer(beneficiary, amountRaised, false);
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} else {
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FundTransfer(0, 11, false);
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for (uint i = 0; i < funders.length; ++i) {
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funders[i].addr.send(funders[i].amount);
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FundTransfer(funders[i].addr, funders[i].amount, false);
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}
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}
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suicide(beneficiary);
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}
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}
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