import { BlockchainLifecycle } from '@0xproject/dev-utils'; import { BigNumber } from '@0xproject/utils'; import { Web3Wrapper } from '@0xproject/web3-wrapper'; import * as chai from 'chai'; import 'make-promises-safe'; import { WETH9Contract } from '../src/generated_contract_wrappers/weth9'; import { artifacts } from '../src/utils/artifacts'; import { expectInsufficientFundsAsync, expectRevertOrAlwaysFailingTransactionAsync } from '../src/utils/assertions'; import { chaiSetup } from '../src/utils/chai_setup'; import { constants } from '../src/utils/constants'; import { provider, txDefaults, web3Wrapper } from '../src/utils/web3_wrapper'; chaiSetup.configure(); const expect = chai.expect; const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper); describe('EtherToken', () => { let account: string; const gasPrice = Web3Wrapper.toBaseUnitAmount(new BigNumber(20), 9); let etherToken: WETH9Contract; before(async () => { await blockchainLifecycle.startAsync(); }); after(async () => { await blockchainLifecycle.revertAsync(); }); before(async () => { const accounts = await web3Wrapper.getAvailableAddressesAsync(); account = accounts[0]; etherToken = await WETH9Contract.deployFrom0xArtifactAsync(artifacts.EtherToken, provider, { gasPrice, ...txDefaults, }); }); 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 expectInsufficientFundsAsync(etherToken.deposit.sendTransactionAsync({ value: ethToDeposit })); }); it('should convert deposited Ether to wrapped Ether tokens', async () => { const initEthBalance = await web3Wrapper.getBalanceInWeiAsync(account); const initEthTokenBalance = await etherToken.balanceOf.callAsync(account); const ethToDeposit = new BigNumber(Web3Wrapper.toWei(new BigNumber(1))); const txHash = await etherToken.deposit.sendTransactionAsync({ value: ethToDeposit }); const receipt = await web3Wrapper.awaitTransactionSuccessAsync( txHash, constants.AWAIT_TRANSACTION_MINED_MS, ); const ethSpentOnGas = gasPrice.times(receipt.gasUsed); const finalEthBalance = await web3Wrapper.getBalanceInWeiAsync(account); const finalEthTokenBalance = await etherToken.balanceOf.callAsync(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 etherToken.balanceOf.callAsync(account); const ethTokensToWithdraw = initEthTokenBalance.plus(1); return expectRevertOrAlwaysFailingTransactionAsync( etherToken.withdraw.sendTransactionAsync(ethTokensToWithdraw), ); }); it('should convert ether tokens to ether with sufficient balance', async () => { const ethToDeposit = new BigNumber(Web3Wrapper.toWei(new BigNumber(1))); await web3Wrapper.awaitTransactionSuccessAsync( await etherToken.deposit.sendTransactionAsync({ value: ethToDeposit }), constants.AWAIT_TRANSACTION_MINED_MS, ); const initEthTokenBalance = await etherToken.balanceOf.callAsync(account); const initEthBalance = await web3Wrapper.getBalanceInWeiAsync(account); const ethTokensToWithdraw = initEthTokenBalance; expect(ethTokensToWithdraw).to.not.be.bignumber.equal(0); const txHash = await etherToken.withdraw.sendTransactionAsync(ethTokensToWithdraw, { gas: constants.MAX_ETHERTOKEN_WITHDRAW_GAS, }); const receipt = await web3Wrapper.awaitTransactionSuccessAsync( txHash, constants.AWAIT_TRANSACTION_MINED_MS, ); const ethSpentOnGas = gasPrice.times(receipt.gasUsed); const finalEthBalance = await web3Wrapper.getBalanceInWeiAsync(account); const finalEthTokenBalance = await etherToken.balanceOf.callAsync(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 etherToken.balanceOf.callAsync(account); const ethToDeposit = Web3Wrapper.toBaseUnitAmount(new BigNumber(1), 18); const txHash = await web3Wrapper.sendTransactionAsync({ from: account, to: etherToken.address, value: ethToDeposit, gasPrice, }); const receipt = await web3Wrapper.awaitTransactionSuccessAsync( txHash, constants.AWAIT_TRANSACTION_MINED_MS, ); const ethSpentOnGas = gasPrice.times(receipt.gasUsed); const finalEthBalance = await web3Wrapper.getBalanceInWeiAsync(account); const finalEthTokenBalance = await etherToken.balanceOf.callAsync(account); expect(finalEthBalance).to.be.bignumber.equal(initEthBalance.minus(ethToDeposit.plus(ethSpentOnGas))); expect(finalEthTokenBalance).to.be.bignumber.equal(initEthTokenBalance.plus(ethToDeposit)); }); }); });