solidity/test/compilationTests/zeppelin/crowdsale/CappedCrowdsale.sol
2017-07-05 12:39:55 +02:00

34 lines
869 B
Solidity

pragma solidity ^0.4.11;
import '../math/SafeMath.sol';
import './Crowdsale.sol';
/**
* @title CappedCrowdsale
* @dev Extension of Crowsdale with a max amount of funds raised
*/
contract CappedCrowdsale is Crowdsale {
using SafeMath for uint256;
uint256 public cap;
function CappedCrowdsale(uint256 _cap) {
cap = _cap;
}
// overriding Crowdsale#validPurchase to add extra cap logic
// @return true if investors can buy at the moment
function validPurchase() internal constant returns (bool) {
bool withinCap = weiRaised.add(msg.value) <= cap;
return super.validPurchase() && withinCap;
}
// overriding Crowdsale#hasEnded to add cap logic
// @return true if crowdsale event has ended
function hasEnded() public constant returns (bool) {
bool capReached = weiRaised >= cap;
return super.hasEnded() || capReached;
}
}