import { BlockchainLifecycle, devConstants, web3Factory } from '@0xproject/dev-utils'; import { BigNumber } from '@0xproject/utils'; import { Web3Wrapper } from '@0xproject/web3-wrapper'; import * as chai from 'chai'; import 'mocha'; import * as Web3 from 'web3'; import { ApprovalContractEventArgs, BlockParamLiteral, BlockRange, DecodedLogEvent, DepositContractEventArgs, EtherTokenEvents, Token, TransferContractEventArgs, WithdrawalContractEventArgs, ZeroEx, ZeroExError, } from '../src'; import { DoneCallback } from '../src/types'; import { chaiSetup } from './utils/chai_setup'; import { constants } from './utils/constants'; import { reportNodeCallbackErrors } from './utils/report_callback_errors'; import { TokenUtils } from './utils/token_utils'; import { web3, web3Wrapper } from './utils/web3_wrapper'; chaiSetup.configure(); const expect = chai.expect; const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper); // Since the address depositing/withdrawing ETH/WETH also needs to pay gas costs for the transaction, // a small amount of ETH will be used to pay this gas cost. We therefore check that the difference between // the expected balance and actual balance (given the amount of ETH deposited), only deviates by the amount // required to pay gas costs. const MAX_REASONABLE_GAS_COST_IN_WEI = 62517; describe('EtherTokenWrapper', () => { let zeroEx: ZeroEx; let tokens: Token[]; let userAddresses: string[]; let addressWithETH: string; let wethContractAddress: string; let depositWeiAmount: BigNumber; let decimalPlaces: number; let addressWithoutFunds: string; const gasPrice = new BigNumber(1); const zeroExConfig = { gasPrice, networkId: constants.TESTRPC_NETWORK_ID, }; const transferAmount = new BigNumber(42); const allowanceAmount = new BigNumber(42); const depositAmount = new BigNumber(42); const withdrawalAmount = new BigNumber(42); before(async () => { zeroEx = new ZeroEx(web3.currentProvider, zeroExConfig); tokens = await zeroEx.tokenRegistry.getTokensAsync(); userAddresses = await zeroEx.getAvailableAddressesAsync(); addressWithETH = userAddresses[0]; wethContractAddress = zeroEx.etherToken.getContractAddressIfExists() as string; depositWeiAmount = Web3Wrapper.toWei(new BigNumber(5)); decimalPlaces = 7; addressWithoutFunds = userAddresses[1]; }); beforeEach(async () => { await blockchainLifecycle.startAsync(); }); afterEach(async () => { await blockchainLifecycle.revertAsync(); }); describe('#getContractAddressIfExists', async () => { it('should return contract address if connected to a known network', () => { const contractAddressIfExists = zeroEx.etherToken.getContractAddressIfExists(); expect(contractAddressIfExists).to.not.be.undefined(); }); it('should throw if connected to a private network and contract addresses are not specified', () => { const UNKNOWN_NETWORK_NETWORK_ID = 10; expect( () => new ZeroEx(web3.currentProvider, { networkId: UNKNOWN_NETWORK_NETWORK_ID, } as any), ).to.throw(); }); }); describe('#depositAsync', () => { it('should successfully deposit ETH and issue Wrapped ETH tokens', async () => { const preETHBalance = await (zeroEx as any)._web3Wrapper.getBalanceInWeiAsync(addressWithETH); const preWETHBalance = await zeroEx.token.getBalanceAsync(wethContractAddress, addressWithETH); expect(preETHBalance).to.be.bignumber.gt(0); expect(preWETHBalance).to.be.bignumber.equal(0); const txHash = await zeroEx.etherToken.depositAsync(wethContractAddress, depositWeiAmount, addressWithETH); await zeroEx.awaitTransactionMinedAsync(txHash); const postETHBalanceInWei = await (zeroEx as any)._web3Wrapper.getBalanceInWeiAsync(addressWithETH); const postWETHBalanceInBaseUnits = await zeroEx.token.getBalanceAsync(wethContractAddress, addressWithETH); expect(postWETHBalanceInBaseUnits).to.be.bignumber.equal(depositWeiAmount); const remainingETHInWei = preETHBalance.minus(depositWeiAmount); const gasCost = remainingETHInWei.minus(postETHBalanceInWei); expect(gasCost).to.be.bignumber.lte(MAX_REASONABLE_GAS_COST_IN_WEI); }); it('should throw if user has insufficient ETH balance for deposit', async () => { const preETHBalance = await (zeroEx as any)._web3Wrapper.getBalanceInWeiAsync(addressWithETH); const extraETHBalance = Web3Wrapper.toWei(new BigNumber(5)); const overETHBalanceinWei = preETHBalance.add(extraETHBalance); return expect( zeroEx.etherToken.depositAsync(wethContractAddress, overETHBalanceinWei, addressWithETH), ).to.be.rejectedWith(ZeroExError.InsufficientEthBalanceForDeposit); }); }); describe('#withdrawAsync', () => { it('should successfully withdraw ETH in return for Wrapped ETH tokens', async () => { const ETHBalanceInWei = await (zeroEx as any)._web3Wrapper.getBalanceInWeiAsync(addressWithETH); await zeroEx.etherToken.depositAsync(wethContractAddress, depositWeiAmount, addressWithETH); const expectedPreETHBalance = ETHBalanceInWei.minus(depositWeiAmount); const preETHBalance = await (zeroEx as any)._web3Wrapper.getBalanceInWeiAsync(addressWithETH); const preWETHBalance = await zeroEx.token.getBalanceAsync(wethContractAddress, addressWithETH); let gasCost = expectedPreETHBalance.minus(preETHBalance); expect(gasCost).to.be.bignumber.lte(MAX_REASONABLE_GAS_COST_IN_WEI); expect(preWETHBalance).to.be.bignumber.equal(depositWeiAmount); const txHash = await zeroEx.etherToken.withdrawAsync(wethContractAddress, depositWeiAmount, addressWithETH); await zeroEx.awaitTransactionMinedAsync(txHash); const postETHBalance = await (zeroEx as any)._web3Wrapper.getBalanceInWeiAsync(addressWithETH); const postWETHBalanceInBaseUnits = await zeroEx.token.getBalanceAsync(wethContractAddress, addressWithETH); expect(postWETHBalanceInBaseUnits).to.be.bignumber.equal(0); const expectedETHBalance = preETHBalance.add(depositWeiAmount).round(decimalPlaces); gasCost = expectedETHBalance.minus(postETHBalance); expect(gasCost).to.be.bignumber.lte(MAX_REASONABLE_GAS_COST_IN_WEI); }); it('should throw if user has insufficient WETH balance for withdrawal', async () => { const preWETHBalance = await zeroEx.token.getBalanceAsync(wethContractAddress, addressWithETH); expect(preWETHBalance).to.be.bignumber.equal(0); const overWETHBalance = preWETHBalance.add(999999999); return expect( zeroEx.etherToken.withdrawAsync(wethContractAddress, overWETHBalance, addressWithETH), ).to.be.rejectedWith(ZeroExError.InsufficientWEthBalanceForWithdrawal); }); }); describe('#subscribe', () => { const indexFilterValues = {}; let etherTokenAddress: string; before(() => { const tokenUtils = new TokenUtils(tokens); const etherToken = tokenUtils.getWethTokenOrThrow(); etherTokenAddress = etherToken.address; }); afterEach(() => { zeroEx.etherToken.unsubscribeAll(); }); // Hack: Mocha does not allow a test to be both async and have a `done` callback // Since we need to await the receipt of the event in the `subscribe` callback, // we do need both. A hack is to make the top-level async fn w/ a done callback and then // wrap the rest of the test in an async block // Source: https://github.com/mochajs/mocha/issues/2407 it('Should receive the Transfer event when tokens are transfered', (done: DoneCallback) => { (async () => { const callback = reportNodeCallbackErrors(done)( (logEvent: DecodedLogEvent) => { expect(logEvent).to.not.be.undefined(); expect(logEvent.isRemoved).to.be.false(); expect(logEvent.log.logIndex).to.be.equal(0); expect(logEvent.log.transactionIndex).to.be.equal(0); expect(logEvent.log.blockNumber).to.be.a('number'); const args = logEvent.log.args; expect(args._from).to.be.equal(addressWithETH); expect(args._to).to.be.equal(addressWithoutFunds); expect(args._value).to.be.bignumber.equal(transferAmount); }, ); await zeroEx.etherToken.depositAsync(etherTokenAddress, transferAmount, addressWithETH); zeroEx.etherToken.subscribe(etherTokenAddress, EtherTokenEvents.Transfer, indexFilterValues, callback); await zeroEx.token.transferAsync( etherTokenAddress, addressWithETH, addressWithoutFunds, transferAmount, ); })().catch(done); }); it('Should receive the Approval event when allowance is being set', (done: DoneCallback) => { (async () => { const callback = reportNodeCallbackErrors(done)( (logEvent: DecodedLogEvent) => { expect(logEvent).to.not.be.undefined(); expect(logEvent.isRemoved).to.be.false(); const args = logEvent.log.args; expect(args._owner).to.be.equal(addressWithETH); expect(args._spender).to.be.equal(addressWithoutFunds); expect(args._value).to.be.bignumber.equal(allowanceAmount); }, ); zeroEx.etherToken.subscribe(etherTokenAddress, EtherTokenEvents.Approval, indexFilterValues, callback); await zeroEx.token.setAllowanceAsync( etherTokenAddress, addressWithETH, addressWithoutFunds, allowanceAmount, ); })().catch(done); }); it('Should receive the Deposit event when ether is being deposited', (done: DoneCallback) => { (async () => { const callback = reportNodeCallbackErrors(done)( (logEvent: DecodedLogEvent) => { expect(logEvent).to.not.be.undefined(); expect(logEvent.isRemoved).to.be.false(); const args = logEvent.log.args; expect(args._owner).to.be.equal(addressWithETH); expect(args._value).to.be.bignumber.equal(depositAmount); }, ); zeroEx.etherToken.subscribe(etherTokenAddress, EtherTokenEvents.Deposit, indexFilterValues, callback); await zeroEx.etherToken.depositAsync(etherTokenAddress, depositAmount, addressWithETH); })().catch(done); }); it('Should receive the Withdrawal event when ether is being withdrawn', (done: DoneCallback) => { (async () => { const callback = reportNodeCallbackErrors(done)( (logEvent: DecodedLogEvent) => { expect(logEvent).to.not.be.undefined(); expect(logEvent.isRemoved).to.be.false(); const args = logEvent.log.args; expect(args._owner).to.be.equal(addressWithETH); expect(args._value).to.be.bignumber.equal(depositAmount); }, ); await zeroEx.etherToken.depositAsync(etherTokenAddress, depositAmount, addressWithETH); zeroEx.etherToken.subscribe( etherTokenAddress, EtherTokenEvents.Withdrawal, indexFilterValues, callback, ); await zeroEx.etherToken.withdrawAsync(etherTokenAddress, withdrawalAmount, addressWithETH); })().catch(done); }); it('should cancel outstanding subscriptions when ZeroEx.setProvider is called', (done: DoneCallback) => { (async () => { const callbackNeverToBeCalled = reportNodeCallbackErrors(done)( (logEvent: DecodedLogEvent) => { done(new Error('Expected this subscription to have been cancelled')); }, ); zeroEx.etherToken.subscribe( etherTokenAddress, EtherTokenEvents.Transfer, indexFilterValues, callbackNeverToBeCalled, ); const callbackToBeCalled = reportNodeCallbackErrors(done)(); const newProvider = web3Factory.getRpcProvider(); zeroEx.setProvider(newProvider, constants.TESTRPC_NETWORK_ID); await zeroEx.etherToken.depositAsync(etherTokenAddress, transferAmount, addressWithETH); zeroEx.etherToken.subscribe( etherTokenAddress, EtherTokenEvents.Transfer, indexFilterValues, callbackToBeCalled, ); await zeroEx.token.transferAsync( etherTokenAddress, addressWithETH, addressWithoutFunds, transferAmount, ); })().catch(done); }); it('Should cancel subscription when unsubscribe called', (done: DoneCallback) => { (async () => { const callbackNeverToBeCalled = reportNodeCallbackErrors(done)( (logEvent: DecodedLogEvent) => { done(new Error('Expected this subscription to have been cancelled')); }, ); await zeroEx.etherToken.depositAsync(etherTokenAddress, transferAmount, addressWithETH); const subscriptionToken = zeroEx.etherToken.subscribe( etherTokenAddress, EtherTokenEvents.Transfer, indexFilterValues, callbackNeverToBeCalled, ); zeroEx.etherToken.unsubscribe(subscriptionToken); await zeroEx.token.transferAsync( etherTokenAddress, addressWithETH, addressWithoutFunds, transferAmount, ); done(); })().catch(done); }); }); describe('#getLogsAsync', () => { let etherTokenAddress: string; let tokenTransferProxyAddress: string; const blockRange: BlockRange = { fromBlock: 0, toBlock: BlockParamLiteral.Latest, }; let txHash: string; before(() => { addressWithETH = userAddresses[0]; const tokenUtils = new TokenUtils(tokens); const etherToken = tokenUtils.getWethTokenOrThrow(); etherTokenAddress = etherToken.address; tokenTransferProxyAddress = zeroEx.proxy.getContractAddress(); }); it('should get logs with decoded args emitted by Approval', async () => { txHash = await zeroEx.token.setUnlimitedProxyAllowanceAsync(etherTokenAddress, addressWithETH); await zeroEx.awaitTransactionMinedAsync(txHash); const eventName = EtherTokenEvents.Approval; const indexFilterValues = {}; const logs = await zeroEx.etherToken.getLogsAsync( etherTokenAddress, eventName, blockRange, indexFilterValues, ); expect(logs).to.have.length(1); const args = logs[0].args; expect(logs[0].event).to.be.equal(eventName); expect(args._owner).to.be.equal(addressWithETH); expect(args._spender).to.be.equal(tokenTransferProxyAddress); expect(args._value).to.be.bignumber.equal(zeroEx.token.UNLIMITED_ALLOWANCE_IN_BASE_UNITS); }); it('should get logs with decoded args emitted by Deposit', async () => { await zeroEx.etherToken.depositAsync(etherTokenAddress, depositAmount, addressWithETH); const eventName = EtherTokenEvents.Deposit; const indexFilterValues = {}; const logs = await zeroEx.etherToken.getLogsAsync( etherTokenAddress, eventName, blockRange, indexFilterValues, ); expect(logs).to.have.length(1); const args = logs[0].args; expect(logs[0].event).to.be.equal(eventName); expect(args._owner).to.be.equal(addressWithETH); expect(args._value).to.be.bignumber.equal(depositAmount); }); it('should only get the logs with the correct event name', async () => { txHash = await zeroEx.token.setUnlimitedProxyAllowanceAsync(etherTokenAddress, addressWithETH); await zeroEx.awaitTransactionMinedAsync(txHash); const differentEventName = EtherTokenEvents.Transfer; const indexFilterValues = {}; const logs = await zeroEx.etherToken.getLogsAsync( etherTokenAddress, differentEventName, blockRange, indexFilterValues, ); expect(logs).to.have.length(0); }); it('should only get the logs with the correct indexed fields', async () => { txHash = await zeroEx.token.setUnlimitedProxyAllowanceAsync(etherTokenAddress, addressWithETH); await zeroEx.awaitTransactionMinedAsync(txHash); txHash = await zeroEx.token.setUnlimitedProxyAllowanceAsync(etherTokenAddress, addressWithoutFunds); await zeroEx.awaitTransactionMinedAsync(txHash); const eventName = EtherTokenEvents.Approval; const indexFilterValues = { _owner: addressWithETH, }; const logs = await zeroEx.etherToken.getLogsAsync( etherTokenAddress, eventName, blockRange, indexFilterValues, ); expect(logs).to.have.length(1); const args = logs[0].args; expect(args._owner).to.be.equal(addressWithETH); }); }); });