deploy.js

// deployer script
let SampleCrowdsale = artifacts.require('./SampleCrowdsale.sol')
let SampleToken = artifacts.require('./SampleToken.sol')
let moment = require('moment')
const multiplier = 10 ** 18
module.exports = function (deployer) {
  const startTime = Math.round(moment().subtract(1, 'd').valueOf() / 1000) // Yesterday
  const endTime = Math.round(moment().add(20, 'd').valueOf() / 1000) // Today + 20 days

  deployer.deploy(SampleToken).then(function () {
    console.log(SampleToken.address)
    deployer.deploy(SampleCrowdsale,
        startTime,
        endTime,
        5,
        '0x66412ffbd1eb05ee0ce764fa287c8bcc4b311b86',
        2 * multiplier, // 2 ETH
        500 * multiplier, // 500 ETH
        SampleToken.address
      ).then(function () {
        console.log('all good')
      }).catch(function (err) {
        console.log('Deplyoment failed')
        console.log(err)
      })
  })
}


// Token

pragma solidity ^0.4.23;

import 'openzeppelin-solidity/contracts/token/ERC20/PausableToken.sol';
import 'openzeppelin-solidity/contracts/token/ERC20/MintableToken.sol';


contract SampleToken is MintableToken {
    string public name = "Sample Token";
    string public symbol = "SAMPLE";
    uint8 public decimals = 18;
}

// Crowdsale

pragma solidity ^0.4.23;

import './SampleToken.sol';
import 'openzeppelin-solidity/contracts/math/SafeMath.sol';
import 'openzeppelin-solidity/contracts/crowdsale/price/IncreasingPriceCrowdsale.sol';
import 'openzeppelin-solidity/contracts/crowdsale/validation/WhitelistedCrowdsale.sol';
import 'openzeppelin-solidity/contracts/crowdsale/validation/CappedCrowdsale.sol';
import 'openzeppelin-solidity/contracts/crowdsale/distribution/RefundableCrowdsale.sol';


contract SampleCrowdsale is CappedCrowdsale, RefundableCrowdsale {
    function SampleCrowdsale(uint256 _startTime, uint256 _endTime, uint256 _rate, address _wallet, uint256 _goal, 
                              uint256 _cap, MintableToken _token) CappedCrowdsale(_cap) FinalizableCrowdsale()
        RefundableCrowdsale(_goal) TimedCrowdsale(_startTime, _endTime) Crowdsale(_rate, _wallet,_token) public {
        require(_goal <= _cap);
    }

}