Merge pull request #342 from jakub-wojciechowski/master
Add complex crowdsale example #331pull/345/head
commit
115e7afe0b
@ -0,0 +1,48 @@ |
|||||||
|
pragma solidity ^0.4.11; |
||||||
|
|
||||||
|
import "../crowdsale/CappedCrowdsale.sol"; |
||||||
|
import "../crowdsale/RefundableCrowdsale.sol"; |
||||||
|
import "../token/MintableToken.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 MintableToken { |
||||||
|
|
||||||
|
string public constant name = "Sample Crowdsale Token"; |
||||||
|
string public constant symbol = "SCT"; |
||||||
|
uint8 public constant decimals = 18; |
||||||
|
|
||||||
|
} |
||||||
|
|
||||||
|
/** |
||||||
|
* @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 |
||||||
|
* |
||||||
|
* After adding multiple features it's good practice to run integration tests |
||||||
|
* to ensure that subcontracts works together as intended. |
||||||
|
*/ |
||||||
|
contract SampleCrowdsale is CappedCrowdsale, RefundableCrowdsale { |
||||||
|
|
||||||
|
function SampleCrowdsale(uint256 _startBlock, uint256 _endBlock, uint256 _rate, uint256 _goal, uint256 _cap, address _wallet) |
||||||
|
CappedCrowdsale(_cap) |
||||||
|
FinalizableCrowdsale() |
||||||
|
RefundableCrowdsale(_goal) |
||||||
|
Crowdsale(_startBlock, _endBlock, _rate, _wallet) |
||||||
|
{ |
||||||
|
//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); |
||||||
|
} |
||||||
|
|
||||||
|
function createTokenContract() internal returns (MintableToken) { |
||||||
|
return new SampleCrowdsaleToken(); |
||||||
|
} |
||||||
|
|
||||||
|
} |
@ -0,0 +1,95 @@ |
|||||||
|
import ether from './helpers/ether' |
||||||
|
import advanceToBlock from './helpers/advanceToBlock' |
||||||
|
import EVMThrow from './helpers/EVMThrow' |
||||||
|
|
||||||
|
const BigNumber = web3.BigNumber; |
||||||
|
|
||||||
|
const should = require('chai') |
||||||
|
.use(require('chai-as-promised')) |
||||||
|
.use(require('chai-bignumber')(BigNumber)) |
||||||
|
.should(); |
||||||
|
|
||||||
|
const SampleCrowdsale = artifacts.require('SampleCrowdsale'); |
||||||
|
const SampleCrowdsaleToken = artifacts.require('SampleCrowdsaleToken'); |
||||||
|
|
||||||
|
contract('Crowdsale', function ([owner, wallet, investor]) { |
||||||
|
|
||||||
|
const RATE = new BigNumber(10); |
||||||
|
const GOAL = ether(10); |
||||||
|
const CAP = ether(20); |
||||||
|
|
||||||
|
beforeEach(async function () { |
||||||
|
this.startBlock = web3.eth.blockNumber + 10; |
||||||
|
this.endBlock = web3.eth.blockNumber + 20; |
||||||
|
|
||||||
|
this.crowdsale = await SampleCrowdsale.new(this.startBlock, this.endBlock, RATE, GOAL, CAP, wallet); |
||||||
|
this.token = SampleCrowdsaleToken.at(await this.crowdsale.token()); |
||||||
|
}); |
||||||
|
|
||||||
|
|
||||||
|
it('should create crowdsale with correct parameters', async function () { |
||||||
|
this.crowdsale.should.exist; |
||||||
|
this.token.should.exist; |
||||||
|
|
||||||
|
(await this.crowdsale.startBlock()).should.be.bignumber.equal(this.startBlock); |
||||||
|
(await this.crowdsale.endBlock()).should.be.bignumber.equal(this.endBlock); |
||||||
|
(await this.crowdsale.rate()).should.be.bignumber.equal(RATE); |
||||||
|
(await this.crowdsale.wallet()).should.be.equal(wallet); |
||||||
|
(await this.crowdsale.goal()).should.be.bignumber.equal(GOAL); |
||||||
|
(await this.crowdsale.cap()).should.be.bignumber.equal(CAP); |
||||||
|
}); |
||||||
|
|
||||||
|
it('should not accept payments before start', async function () { |
||||||
|
await this.crowdsale.send(ether(1)).should.be.rejectedWith(EVMThrow); |
||||||
|
await this.crowdsale.buyTokens(investor, {from: investor, value: ether(1)}).should.be.rejectedWith(EVMThrow); |
||||||
|
}); |
||||||
|
|
||||||
|
it('should accept payments during the sale', async function () { |
||||||
|
const investmentAmount = ether(1); |
||||||
|
const expectedTokenAmount = RATE.mul(investmentAmount); |
||||||
|
|
||||||
|
await advanceToBlock(this.startBlock - 1); |
||||||
|
await this.crowdsale.buyTokens(investor, {value: investmentAmount, from: investor}).should.be.fulfilled; |
||||||
|
|
||||||
|
(await this.token.balanceOf(investor)).should.be.bignumber.equal(expectedTokenAmount); |
||||||
|
(await this.token.totalSupply()).should.be.bignumber.equal(expectedTokenAmount); |
||||||
|
}); |
||||||
|
|
||||||
|
it('should reject payments after end', async function () { |
||||||
|
await advanceToBlock(this.endBlock); |
||||||
|
await this.crowdsale.send(ether(1)).should.be.rejectedWith(EVMThrow); |
||||||
|
await this.crowdsale.buyTokens(investor, {value: ether(1), from: investor}).should.be.rejectedWith(EVMThrow); |
||||||
|
}); |
||||||
|
|
||||||
|
it('should reject payments over cap', async function () { |
||||||
|
await advanceToBlock(this.startBlock - 1); |
||||||
|
await this.crowdsale.send(CAP); |
||||||
|
await this.crowdsale.send(1).should.be.rejectedWith(EVMThrow); |
||||||
|
}); |
||||||
|
|
||||||
|
it('should allow finalization and transfer funds to wallet if the goal is reached', async function () { |
||||||
|
await advanceToBlock(this.endBlock - 1); |
||||||
|
await this.crowdsale.send(GOAL); |
||||||
|
|
||||||
|
const beforeFinalization = web3.eth.getBalance(wallet); |
||||||
|
await this.crowdsale.finalize({from: owner}); |
||||||
|
const afterFinalization = web3.eth.getBalance(wallet); |
||||||
|
|
||||||
|
afterFinalization.minus(beforeFinalization).should.be.bignumber.equal(GOAL); |
||||||
|
}); |
||||||
|
|
||||||
|
it('should allow refunds if the goal is not reached', async function () { |
||||||
|
const balanceBeforeInvestment = web3.eth.getBalance(investor); |
||||||
|
|
||||||
|
await advanceToBlock(this.startBlock - 1); |
||||||
|
await this.crowdsale.sendTransaction({value: ether(1), from: investor, gasPrice: 0}); |
||||||
|
await advanceToBlock(this.endBlock); |
||||||
|
|
||||||
|
await this.crowdsale.finalize({from: owner}); |
||||||
|
await this.crowdsale.claimRefund({from: investor, gasPrice: 0}).should.be.fulfilled; |
||||||
|
|
||||||
|
const balanceAfterRefund = web3.eth.getBalance(investor); |
||||||
|
balanceBeforeInvestment.should.be.bignumber.equal(balanceAfterRefund); |
||||||
|
}); |
||||||
|
|
||||||
|
}); |
Loading…
Reference in new issue