pragma solidity ^0.4.11; import '../math/SafeMath.sol'; import './FinalizableCrowdsale.sol'; import './RefundVault.sol'; /** * @title RefundableCrowdsale * @dev Extension of Crowdsale contract that adds a funding goal, and * the possibility of users getting a refund if goal is not met. * Uses a RefundVault as the crowdsale's vault. */ contract RefundableCrowdsale is FinalizableCrowdsale { using SafeMath for uint256; // minimum amount of funds to be raised in weis uint256 public goal; // refund vault used to hold funds while crowdsale is running RefundVault public vault; constructor(uint256 _goal) { vault = new RefundVault(wallet); goal = _goal; } // We're overriding the fund forwarding from Crowdsale. // In addition to sending the funds, we want to call // the RefundVault deposit function function forwardFunds() internal { vault.deposit.value(msg.value)(msg.sender); } // if crowdsale is unsuccessful, investors can claim refunds here function claimRefund() { require(isFinalized); require(!goalReached()); vault.refund(msg.sender); } // vault finalization task, called when owner calls finalize() function finalization() internal { if (goalReached()) { vault.close(); } else { vault.enableRefunds(); } super.finalization(); } function goalReached() public view returns (bool) { return weiRaised >= goal; } }