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pragma solidity ^0.5.2;
import "@openzeppelin/upgrades/contracts/Initializable.sol";
import "../crowdsale/validation/CappedCrowdsale.sol";
import "../crowdsale/distribution/RefundableCrowdsale.sol";
import "../crowdsale/emission/MintedCrowdsale.sol";
import "../token/ERC20/ERC20Mintable.sol";
import "../token/ERC20/ERC20Detailed.sol";
* @title SampleCrowdsaleToken
* @dev Very simple ERC20 Token that can be minted.
* It is meant to be used in a crowdsale contract.
contract SampleCrowdsaleToken is Initializable, ERC20Mintable, ERC20Detailed {
function initialize(address sender) public initializer {
ERC20Detailed.initialize("Sample Crowdsale Token", "SCT", 18);
uint256[50] private ______gap;
* @title SampleCrowdsale
* @dev This is an example of a fully fledged crowdsale.
* The way to add new features to a base crowdsale is by multiple inheritance.
* In this example we are providing following extensions:
* CappedCrowdsale - sets a max boundary for raised funds
* RefundableCrowdsale - set a min goal to be reached and returns funds if it's not met
* MintedCrowdsale - assumes the token can be minted by the crowdsale, which does so
* when receiving purchases.
* After adding multiple features it's good practice to run integration tests
* to ensure that subcontracts works together as intended.
contract SampleCrowdsale is Initializable, Crowdsale, CappedCrowdsale, RefundableCrowdsale, MintedCrowdsale {
function initialize(
uint256 openingTime,
uint256 closingTime,
uint256 rate,
address payable wallet,
uint256 cap,
ERC20Mintable token,
uint256 goal
Crowdsale.initialize(rate, wallet, token);
TimedCrowdsale.initialize(openingTime, closingTime);
//As goal needs to be met for a successful crowdsale
//the value needs to less or equal than a cap which is limit for accepted funds
require(goal <= cap);
uint256[50] private ______gap;
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