DVFooCrowdsale8.sol

DVFooCrowdsale8.sol

pragma solidity ^0.4.13;

interface token {
    function transfer(address receiver, uint256 amount);
    function burn(uint256 value);
}

contract DVFooCrowdsale8 {
    address public beneficiary;
    uint public fundingGoal;
    uint public amountRaised;
    uint public deadline;
    uint public price;
    uint public tokensForSale;
    uint public tokensRemains;
    token public tokenReward;
    mapping(address => uint256) public balanceOf;
    bool fundingGoalReached = false;
    event GoalReached(address beneficiary, uint amountRaised);
    event FundTransfer(address backer, uint amount, bool isContribution);
    bool public crowdsaleClosed = false;

    /* data structure to hold information about campaign contributors */

    /*  at initialization, setup the owner */
    function DVFooCrowdsale8(
        address ifSuccessfulSendTo,
        uint fundingGoalInEthers,
        uint durationInMinutes,
        uint etherCostOfEachToken,
        uint tokensForSaleCount,
        token addressOfTokenUsedAsReward
    ) {
        beneficiary = ifSuccessfulSendTo;
        fundingGoal = fundingGoalInEthers * 1 ether;
        deadline = now + durationInMinutes * 1 minutes;
        price = etherCostOfEachToken * 1 ether;
        tokensForSale = tokensForSaleCount * 100;
        tokensRemains = tokensForSale;
        tokenReward = token(addressOfTokenUsedAsReward);
    }

    /* The function without name is the default function that is called whenever anyone sends funds to a contract */
    function () payable {
        assert(!crowdsaleClosed);
        assert(msg.value <= fundingGoal - amountRaised);
        uint amount = msg.value;
        balanceOf[msg.sender] += amount;
        amountRaised += amount;
        if (amountRaised >= fundingGoal) {
            fundingGoalReached = true;
            deadline = now;
            crowdsaleClosed = true;
            GoalReached(beneficiary, amountRaised);
        }
        uint toSend = 100 * amount / price;
        tokenReward.transfer(msg.sender, toSend);
        tokensRemains -= toSend;
        FundTransfer(msg.sender, amount, true);
    }

    modifier afterDeadline() { if (now >= deadline) _; }

    /* checks if the goal or time limit has been reached and ends the campaign */
    function checkGoalReached() afterDeadline {
        if (beneficiary == msg.sender) {
            if (amountRaised >= fundingGoal){
                fundingGoalReached = true;
                GoalReached(beneficiary, amountRaised);
            }
            crowdsaleClosed = true;
        }
    }
    
    function closeCrowdsaleManually() {
        if (beneficiary == msg.sender) {
            fundingGoalReached = true;
            deadline = now;
            crowdsaleClosed = true;
            GoalReached(beneficiary, amountRaised);
        }
    }

    function safeWithdrawal() afterDeadline {
        uint256 amount;
        if (!fundingGoalReached) {
            amount = balanceOf[msg.sender];
            balanceOf[msg.sender] = 0;
            if (amount > 0) {
                if (msg.sender.send(amount)) {
                    FundTransfer(msg.sender, amount, false);
                } else {
                    balanceOf[msg.sender] = amount;
                }
            }
        }

        if (fundingGoalReached && beneficiary == msg.sender) {
            if (beneficiary.send(amountRaised)) {
                if (tokensRemains > 0) {
                    tokenReward.burn(tokensRemains);
                }
                FundTransfer(beneficiary, amountRaised, false);
            } else {
                //If we fail to send the funds to beneficiary, unlock funders balance
                fundingGoalReached = false;
            }
        }
    }
}