import { ContractWrappersError, ZeroEx } from '0x.js'; import { BlockchainLifecycle, devConstants, web3Factory } from '@0xproject/dev-utils'; import { BigNumber, promisify } from '@0xproject/utils'; import { Web3Wrapper } from '@0xproject/web3-wrapper'; import * as chai from 'chai'; import 'make-promises-safe'; import { WETH9Contract } from '../src/contract_wrappers/generated/weth9'; import { artifacts } from '../util/artifacts'; import { constants } from '../util/constants'; import { ContractName } from '../util/types'; import { chaiSetup } from './utils/chai_setup'; import { provider, txDefaults, web3Wrapper } from './utils/web3_wrapper'; chaiSetup.configure(); const expect = chai.expect; const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper); describe('EtherToken', () => { let account: string; const gasPrice = ZeroEx.toBaseUnitAmount(new BigNumber(20), 9); let zeroEx: ZeroEx; let etherTokenAddress: string; before(async () => { const accounts = await web3Wrapper.getAvailableAddressesAsync(); account = accounts[0]; const etherToken = await WETH9Contract.deployFrom0xArtifactAsync(artifacts.EtherToken, provider, txDefaults); etherTokenAddress = etherToken.address; zeroEx = new ZeroEx(provider, { gasPrice, networkId: constants.TESTRPC_NETWORK_ID, }); }); beforeEach(async () => { await blockchainLifecycle.startAsync(); }); afterEach(async () => { await blockchainLifecycle.revertAsync(); }); describe('deposit', () => { it('should throw if caller attempts to deposit more Ether than caller balance', async () => { const initEthBalance = await web3Wrapper.getBalanceInWeiAsync(account); const ethToDeposit = initEthBalance.plus(1); return expect(zeroEx.etherToken.depositAsync(etherTokenAddress, ethToDeposit, account)).to.be.rejectedWith( ContractWrappersError.InsufficientEthBalanceForDeposit, ); }); it('should convert deposited Ether to wrapped Ether tokens', async () => { const initEthBalance = await web3Wrapper.getBalanceInWeiAsync(account); const initEthTokenBalance = await zeroEx.token.getBalanceAsync(etherTokenAddress, account); const ethToDeposit = new BigNumber(Web3Wrapper.toWei(new BigNumber(1))); const txHash = await zeroEx.etherToken.depositAsync(etherTokenAddress, ethToDeposit, account); const receipt = await zeroEx.awaitTransactionMinedAsync(txHash); const ethSpentOnGas = gasPrice.times(receipt.gasUsed); const finalEthBalance = await web3Wrapper.getBalanceInWeiAsync(account); const finalEthTokenBalance = await zeroEx.token.getBalanceAsync(etherTokenAddress, account); expect(finalEthBalance).to.be.bignumber.equal(initEthBalance.minus(ethToDeposit.plus(ethSpentOnGas))); expect(finalEthTokenBalance).to.be.bignumber.equal(initEthTokenBalance.plus(ethToDeposit)); }); }); describe('withdraw', () => { it('should throw if caller attempts to withdraw greater than caller balance', async () => { const initEthTokenBalance = await zeroEx.token.getBalanceAsync(etherTokenAddress, account); const ethTokensToWithdraw = initEthTokenBalance.plus(1); return expect( zeroEx.etherToken.withdrawAsync(etherTokenAddress, ethTokensToWithdraw, account), ).to.be.rejectedWith(ContractWrappersError.InsufficientWEthBalanceForWithdrawal); }); it('should convert ether tokens to ether with sufficient balance', async () => { const ethToDeposit = new BigNumber(Web3Wrapper.toWei(new BigNumber(1))); await zeroEx.etherToken.depositAsync(etherTokenAddress, ethToDeposit, account); const initEthTokenBalance = await zeroEx.token.getBalanceAsync(etherTokenAddress, account); const initEthBalance = await web3Wrapper.getBalanceInWeiAsync(account); const ethTokensToWithdraw = initEthTokenBalance; expect(ethTokensToWithdraw).to.not.be.bignumber.equal(0); const txHash = await zeroEx.etherToken.withdrawAsync(etherTokenAddress, ethTokensToWithdraw, account, { gasLimit: constants.MAX_ETHERTOKEN_WITHDRAW_GAS, }); const receipt = await zeroEx.awaitTransactionMinedAsync(txHash); const ethSpentOnGas = gasPrice.times(receipt.gasUsed); const finalEthBalance = await web3Wrapper.getBalanceInWeiAsync(account); const finalEthTokenBalance = await zeroEx.token.getBalanceAsync(etherTokenAddress, account); expect(finalEthBalance).to.be.bignumber.equal( initEthBalance.plus(ethTokensToWithdraw.minus(ethSpentOnGas)), ); expect(finalEthTokenBalance).to.be.bignumber.equal(initEthTokenBalance.minus(ethTokensToWithdraw)); }); }); describe('fallback', () => { it('should convert sent ether to ether tokens', async () => { const initEthBalance = await web3Wrapper.getBalanceInWeiAsync(account); const initEthTokenBalance = await zeroEx.token.getBalanceAsync(etherTokenAddress, account); const ethToDeposit = ZeroEx.toBaseUnitAmount(new BigNumber(1), 18); const txHash = await web3Wrapper.sendTransactionAsync({ from: account, to: etherTokenAddress, value: ethToDeposit, gasPrice, }); const receipt = await zeroEx.awaitTransactionMinedAsync(txHash); const ethSpentOnGas = gasPrice.times(receipt.gasUsed); const finalEthBalance = await web3Wrapper.getBalanceInWeiAsync(account); const finalEthTokenBalance = await zeroEx.token.getBalanceAsync(etherTokenAddress, account); expect(finalEthBalance).to.be.bignumber.equal(initEthBalance.minus(ethToDeposit.plus(ethSpentOnGas))); expect(finalEthTokenBalance).to.be.bignumber.equal(initEthTokenBalance.plus(ethToDeposit)); }); }); });