You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
85 lines
2.1 KiB
85 lines
2.1 KiB
pragma solidity ^0.4.24;
|
|
|
|
import "../../math/SafeMath.sol";
|
|
import "../Crowdsale.sol";
|
|
|
|
|
|
/**
|
|
* @title TimedCrowdsale
|
|
* @dev Crowdsale accepting contributions only within a time frame.
|
|
*/
|
|
contract TimedCrowdsale is Crowdsale {
|
|
using SafeMath for uint256;
|
|
|
|
uint256 private openingTime_;
|
|
uint256 private closingTime_;
|
|
|
|
/**
|
|
* @dev Reverts if not in crowdsale time range.
|
|
*/
|
|
modifier onlyWhileOpen {
|
|
require(isOpen());
|
|
_;
|
|
}
|
|
|
|
/**
|
|
* @dev Constructor, takes crowdsale opening and closing times.
|
|
* @param _openingTime Crowdsale opening time
|
|
* @param _closingTime Crowdsale closing time
|
|
*/
|
|
constructor(uint256 _openingTime, uint256 _closingTime) public {
|
|
// solium-disable-next-line security/no-block-members
|
|
require(_openingTime >= block.timestamp);
|
|
require(_closingTime >= _openingTime);
|
|
|
|
openingTime_ = _openingTime;
|
|
closingTime_ = _closingTime;
|
|
}
|
|
|
|
/**
|
|
* @return the crowdsale opening time.
|
|
*/
|
|
function openingTime() public view returns(uint256) {
|
|
return openingTime_;
|
|
}
|
|
|
|
/**
|
|
* @return the crowdsale closing time.
|
|
*/
|
|
function closingTime() public view returns(uint256) {
|
|
return closingTime_;
|
|
}
|
|
|
|
/**
|
|
* @return true if the crowdsale is open, false otherwise.
|
|
*/
|
|
function isOpen() public view returns (bool) {
|
|
// solium-disable-next-line security/no-block-members
|
|
return block.timestamp >= openingTime_ && block.timestamp <= closingTime_;
|
|
}
|
|
|
|
/**
|
|
* @dev Checks whether the period in which the crowdsale is open has already elapsed.
|
|
* @return Whether crowdsale period has elapsed
|
|
*/
|
|
function hasClosed() public view returns (bool) {
|
|
// solium-disable-next-line security/no-block-members
|
|
return block.timestamp > closingTime_;
|
|
}
|
|
|
|
/**
|
|
* @dev Extend parent behavior requiring to be within contributing period
|
|
* @param _beneficiary Token purchaser
|
|
* @param _weiAmount Amount of wei contributed
|
|
*/
|
|
function _preValidatePurchase(
|
|
address _beneficiary,
|
|
uint256 _weiAmount
|
|
)
|
|
internal
|
|
onlyWhileOpen
|
|
{
|
|
super._preValidatePurchase(_beneficiary, _weiAmount);
|
|
}
|
|
|
|
}
|
|
|