import 'mocha';
import * as chai from 'chai';
import {chaiSetup} from './utils/chai_setup';
import * as Web3 from 'web3';
import * as BigNumber from 'bignumber.js';
import promisify = require('es6-promisify');
import {web3Factory} from './utils/web3_factory';
import {
ZeroEx,
ZeroExError,
Token,
SubscriptionOpts,
TokenEvents,
ContractEvent,
TransferContractEventArgs,
ApprovalContractEventArgs,
} from '../src';
import {BlockchainLifecycle} from './utils/blockchain_lifecycle';
import {TokenUtils} from './utils/token_utils';
import {DoneCallback} from '../src/types';
chaiSetup.configure();
const expect = chai.expect;
const blockchainLifecycle = new BlockchainLifecycle();
describe('TokenWrapper', () => {
let web3: Web3;
let zeroEx: ZeroEx;
let userAddresses: string[];
let tokens: Token[];
let tokenUtils: TokenUtils;
let coinbase: string;
let addressWithoutFunds: string;
before(async () => {
web3 = web3Factory.create();
zeroEx = new ZeroEx(web3.currentProvider);
userAddresses = await zeroEx.getAvailableAddressesAsync();
tokens = await zeroEx.tokenRegistry.getTokensAsync();
tokenUtils = new TokenUtils(tokens);
coinbase = userAddresses[0];
addressWithoutFunds = userAddresses[1];
});
beforeEach(async () => {
await blockchainLifecycle.startAsync();
});
afterEach(async () => {
await blockchainLifecycle.revertAsync();
});
describe('#transferAsync', () => {
let token: Token;
let transferAmount: BigNumber.BigNumber;
before(() => {
token = tokens[0];
transferAmount = new BigNumber(42);
});
it('should successfully transfer tokens', async () => {
const fromAddress = coinbase;
const toAddress = addressWithoutFunds;
const preBalance = await zeroEx.token.getBalanceAsync(token.address, toAddress);
expect(preBalance).to.be.bignumber.equal(0);
await zeroEx.token.transferAsync(token.address, fromAddress, toAddress, transferAmount);
const postBalance = await zeroEx.token.getBalanceAsync(token.address, toAddress);
return expect(postBalance).to.be.bignumber.equal(transferAmount);
});
it('should fail to transfer tokens if fromAddress has an insufficient balance', async () => {
const fromAddress = addressWithoutFunds;
const toAddress = coinbase;
return expect(zeroEx.token.transferAsync(
token.address, fromAddress, toAddress, transferAmount,
)).to.be.rejectedWith(ZeroExError.InsufficientBalanceForTransfer);
});
it('should throw a CONTRACT_DOES_NOT_EXIST error for a non-existent token contract', async () => {
const nonExistentTokenAddress = '0x9dd402f14d67e001d8efbe6583e51bf9706aa065';
const fromAddress = coinbase;
const toAddress = coinbase;
return expect(zeroEx.token.transferAsync(
nonExistentTokenAddress, fromAddress, toAddress, transferAmount,
)).to.be.rejectedWith(ZeroExError.ContractDoesNotExist);
});
});
describe('#transferFromAsync', () => {
let token: Token;
let toAddress: string;
let senderAddress: string;
before(async () => {
token = tokens[0];
toAddress = addressWithoutFunds;
senderAddress = userAddresses[2];
});
it('should fail to transfer tokens if fromAddress has insufficient allowance set', async () => {
const fromAddress = coinbase;
const transferAmount = new BigNumber(42);
const fromAddressBalance = await zeroEx.token.getBalanceAsync(token.address, fromAddress);
expect(fromAddressBalance).to.be.bignumber.greaterThan(transferAmount);
const fromAddressAllowance = await zeroEx.token.getAllowanceAsync(token.address, fromAddress,
toAddress);
expect(fromAddressAllowance).to.be.bignumber.equal(0);
return expect(zeroEx.token.transferFromAsync(
token.address, fromAddress, toAddress, senderAddress, transferAmount,
)).to.be.rejectedWith(ZeroExError.InsufficientAllowanceForTransfer);
});
it('[regression] should fail to transfer tokens if set allowance for toAddress instead of senderAddress',
async () => {
const fromAddress = coinbase;
const transferAmount = new BigNumber(42);
await zeroEx.token.setAllowanceAsync(token.address, fromAddress, toAddress, transferAmount);
return expect(zeroEx.token.transferFromAsync(
token.address, fromAddress, toAddress, senderAddress, transferAmount,
)).to.be.rejectedWith(ZeroExError.InsufficientAllowanceForTransfer);
});
it('should fail to transfer tokens if fromAddress has insufficient balance', async () => {
const fromAddress = addressWithoutFunds;
const transferAmount = new BigNumber(42);
const fromAddressBalance = await zeroEx.token.getBalanceAsync(token.address, fromAddress);
expect(fromAddressBalance).to.be.bignumber.equal(0);
await zeroEx.token.setAllowanceAsync(token.address, fromAddress, senderAddress, transferAmount);
const fromAddressAllowance = await zeroEx.token.getAllowanceAsync(token.address, fromAddress,
senderAddress);
expect(fromAddressAllowance).to.be.bignumber.equal(transferAmount);
return expect(zeroEx.token.transferFromAsync(
token.address, fromAddress, toAddress, senderAddress, transferAmount,
)).to.be.rejectedWith(ZeroExError.InsufficientBalanceForTransfer);
});
it('should successfully transfer tokens', async () => {
const fromAddress = coinbase;
const preBalance = await zeroEx.token.getBalanceAsync(token.address, toAddress);
expect(preBalance).to.be.bignumber.equal(0);
const transferAmount = new BigNumber(42);
await zeroEx.token.setAllowanceAsync(token.address, fromAddress, senderAddress, transferAmount);
await zeroEx.token.transferFromAsync(token.address, fromAddress, toAddress, senderAddress,
transferAmount);
const postBalance = await zeroEx.token.getBalanceAsync(token.address, toAddress);
return expect(postBalance).to.be.bignumber.equal(transferAmount);
});
it('should throw a CONTRACT_DOES_NOT_EXIST error for a non-existent token contract', async () => {
const fromAddress = coinbase;
const nonExistentTokenAddress = '0x9dd402f14d67e001d8efbe6583e51bf9706aa065';
return expect(zeroEx.token.transferFromAsync(
nonExistentTokenAddress, fromAddress, toAddress, senderAddress, new BigNumber(42),
)).to.be.rejectedWith(ZeroExError.ContractDoesNotExist);
});
});
describe('#getBalanceAsync', () => {
describe('With web3 provider with accounts', () => {
it('should return the balance for an existing ERC20 token', async () => {
const token = tokens[0];
const ownerAddress = coinbase;
const balance = await zeroEx.token.getBalanceAsync(token.address, ownerAddress);
const expectedBalance = new BigNumber('100000000000000000000000000');
return expect(balance).to.be.bignumber.equal(expectedBalance);
});
it('should throw a CONTRACT_DOES_NOT_EXIST error for a non-existent token contract', async () => {
const nonExistentTokenAddress = '0x9dd402f14d67e001d8efbe6583e51bf9706aa065';
const ownerAddress = coinbase;
return expect(zeroEx.token.getBalanceAsync(nonExistentTokenAddress, ownerAddress))
.to.be.rejectedWith(ZeroExError.ContractDoesNotExist);
});
it('should return a balance of 0 for a non-existent owner address', async () => {
const token = tokens[0];
const nonExistentOwner = '0x198c6ad858f213fb31b6fe809e25040e6b964593';
const balance = await zeroEx.token.getBalanceAsync(token.address, nonExistentOwner);
const expectedBalance = new BigNumber(0);
return expect(balance).to.be.bignumber.equal(expectedBalance);
});
});
describe('With web3 provider without accounts', () => {
let zeroExWithoutAccounts: ZeroEx;
before(async () => {
const hasAddresses = false;
const web3WithoutAccounts = web3Factory.create(hasAddresses);
zeroExWithoutAccounts = new ZeroEx(web3WithoutAccounts.currentProvider);
});
it('should return balance even when called with Web3 provider instance without addresses', async () => {
const token = tokens[0];
const ownerAddress = coinbase;
const balance = await zeroExWithoutAccounts.token.getBalanceAsync(token.address, ownerAddress);
const expectedBalance = new BigNumber('100000000000000000000000000');
return expect(balance).to.be.bignumber.equal(expectedBalance);
});
});
});
describe('#setAllowanceAsync', () => {
it('should set the spender\'s allowance', async () => {
const token = tokens[0];
const ownerAddress = coinbase;
const spenderAddress = addressWithoutFunds;
const allowanceBeforeSet = await zeroEx.token.getAllowanceAsync(token.address, ownerAddress,
spenderAddress);
const expectedAllowanceBeforeAllowanceSet = new BigNumber(0);
expect(allowanceBeforeSet).to.be.bignumber.equal(expectedAllowanceBeforeAllowanceSet);
const amountInBaseUnits = new BigNumber(50);
await zeroEx.token.setAllowanceAsync(token.address, ownerAddress, spenderAddress, amountInBaseUnits);
const allowanceAfterSet = await zeroEx.token.getAllowanceAsync(token.address, ownerAddress, spenderAddress);
const expectedAllowanceAfterAllowanceSet = amountInBaseUnits;
return expect(allowanceAfterSet).to.be.bignumber.equal(expectedAllowanceAfterAllowanceSet);
});
});
describe('#setUnlimitedAllowanceAsync', () => {
it('should set the unlimited spender\'s allowance', async () => {
const token = tokens[0];
const ownerAddress = coinbase;
const spenderAddress = addressWithoutFunds;
await zeroEx.token.setUnlimitedAllowanceAsync(token.address, ownerAddress, spenderAddress);
const allowance = await zeroEx.token.getAllowanceAsync(token.address, ownerAddress, spenderAddress);
return expect(allowance).to.be.bignumber.equal(zeroEx.token.UNLIMITED_ALLOWANCE_IN_BASE_UNITS);
});
it('should reduce the gas cost for transfers including tokens with unlimited allowance support', async () => {
const transferAmount = new BigNumber(5);
const zrx = tokenUtils.getProtocolTokenOrThrow();
const [, userWithNormalAllowance, userWithUnlimitedAllowance] = userAddresses;
await zeroEx.token.setAllowanceAsync(zrx.address, coinbase, userWithNormalAllowance, transferAmount);
await zeroEx.token.setUnlimitedAllowanceAsync(zrx.address, coinbase, userWithUnlimitedAllowance);
const initBalanceWithNormalAllowance = await promisify(web3.eth.getBalance)(userWithNormalAllowance);
const initBalanceWithUnlimitedAllowance = await promisify(web3.eth.getBalance)(userWithUnlimitedAllowance);
await zeroEx.token.transferFromAsync(
zrx.address, coinbase, userWithNormalAllowance, userWithNormalAllowance, transferAmount,
);
await zeroEx.token.transferFromAsync(
zrx.address, coinbase, userWithUnlimitedAllowance, userWithUnlimitedAllowance, transferAmount,
);
const finalBalanceWithNormalAllowance = await promisify(web3.eth.getBalance)(userWithNormalAllowance);
const finalBalanceWithUnlimitedAllowance = await promisify(web3.eth.getBalance)(userWithUnlimitedAllowance);
const normalGasCost = initBalanceWithNormalAllowance.minus(finalBalanceWithNormalAllowance);
const unlimitedGasCost = initBalanceWithUnlimitedAllowance.minus(finalBalanceWithUnlimitedAllowance);
// In theory the gas cost with unlimited allowance should be smaller, but with testrpc it's actually bigger.
// This needs to be investigated in ethereumjs-vm. This test is essentially a repro.
// TODO: Make this test pass with inverted assertion.
expect(unlimitedGasCost.toNumber()).to.be.gt(normalGasCost.toNumber());
});
});
describe('#getAllowanceAsync', () => {
describe('With web3 provider with accounts', () => {
it('should get the proxy allowance', async () => {
const token = tokens[0];
const ownerAddress = coinbase;
const spenderAddress = addressWithoutFunds;
const amountInBaseUnits = new BigNumber(50);
await zeroEx.token.setAllowanceAsync(token.address, ownerAddress, spenderAddress, amountInBaseUnits);
const allowance = await zeroEx.token.getAllowanceAsync(token.address, ownerAddress, spenderAddress);
const expectedAllowance = amountInBaseUnits;
return expect(allowance).to.be.bignumber.equal(expectedAllowance);
});
it('should return 0 if no allowance set yet', async () => {
const token = tokens[0];
const ownerAddress = coinbase;
const spenderAddress = addressWithoutFunds;
const allowance = await zeroEx.token.getAllowanceAsync(token.address, ownerAddress, spenderAddress);
const expectedAllowance = new BigNumber(0);
return expect(allowance).to.be.bignumber.equal(expectedAllowance);
});
});
describe('With web3 provider without accounts', () => {
let zeroExWithoutAccounts: ZeroEx;
before(async () => {
const hasAddresses = false;
const web3WithoutAccounts = web3Factory.create(hasAddresses);
zeroExWithoutAccounts = new ZeroEx(web3WithoutAccounts.currentProvider);
});
it('should get the proxy allowance', async () => {
const token = tokens[0];
const ownerAddress = coinbase;
const spenderAddress = addressWithoutFunds;
const amountInBaseUnits = new BigNumber(50);
await zeroEx.token.setAllowanceAsync(token.address, ownerAddress, spenderAddress, amountInBaseUnits);
const allowance = await zeroExWithoutAccounts.token.getAllowanceAsync(
token.address, ownerAddress, spenderAddress,
);
const expectedAllowance = amountInBaseUnits;
return expect(allowance).to.be.bignumber.equal(expectedAllowance);
});
});
});
describe('#getProxyAllowanceAsync', () => {
it('should get the proxy allowance', async () => {
const token = tokens[0];
const ownerAddress = coinbase;
const amountInBaseUnits = new BigNumber(50);
await zeroEx.token.setProxyAllowanceAsync(token.address, ownerAddress, amountInBaseUnits);
const allowance = await zeroEx.token.getProxyAllowanceAsync(token.address, ownerAddress);
const expectedAllowance = amountInBaseUnits;
return expect(allowance).to.be.bignumber.equal(expectedAllowance);
});
});
describe('#setProxyAllowanceAsync', () => {
it('should set the proxy allowance', async () => {
const token = tokens[0];
const ownerAddress = coinbase;
const allowanceBeforeSet = await zeroEx.token.getProxyAllowanceAsync(token.address, ownerAddress);
const expectedAllowanceBeforeAllowanceSet = new BigNumber(0);
expect(allowanceBeforeSet).to.be.bignumber.equal(expectedAllowanceBeforeAllowanceSet);
const amountInBaseUnits = new BigNumber(50);
await zeroEx.token.setProxyAllowanceAsync(token.address, ownerAddress, amountInBaseUnits);
const allowanceAfterSet = await zeroEx.token.getProxyAllowanceAsync(token.address, ownerAddress);
const expectedAllowanceAfterAllowanceSet = amountInBaseUnits;
return expect(allowanceAfterSet).to.be.bignumber.equal(expectedAllowanceAfterAllowanceSet);
});
});
describe('#setUnlimitedProxyAllowanceAsync', () => {
it('should set the unlimited proxy allowance', async () => {
const token = tokens[0];
const ownerAddress = coinbase;
await zeroEx.token.setUnlimitedProxyAllowanceAsync(token.address, ownerAddress);
const allowance = await zeroEx.token.getProxyAllowanceAsync(token.address, ownerAddress);
return expect(allowance).to.be.bignumber.equal(zeroEx.token.UNLIMITED_ALLOWANCE_IN_BASE_UNITS);
});
});
describe('#subscribeAsync', () => {
const indexFilterValues = {};
const shouldThrowOnInsufficientBalanceOrAllowance = true;
let tokenAddress: string;
const subscriptionOpts: SubscriptionOpts = {
fromBlock: 0,
toBlock: 'latest',
};
const transferAmount = new BigNumber(42);
const allowanceAmount = new BigNumber(42);
before(() => {
const token = tokens[0];
tokenAddress = token.address;
});
afterEach(async () => {
await zeroEx.token.stopWatchingAllEventsAsync();
});
// 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 `subscribeAsync` callback,
// we do need both. A hack is to make the top-level a sync 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 zeroExEvent = await zeroEx.token.subscribeAsync(
tokenAddress, TokenEvents.Transfer, subscriptionOpts, indexFilterValues);
zeroExEvent.watch((err: Error, event: ContractEvent) => {
expect(err).to.be.null();
expect(event).to.not.be.undefined();
const args = event.args as TransferContractEventArgs;
expect(args._from).to.be.equal(coinbase);
expect(args._to).to.be.equal(addressWithoutFunds);
expect(args._value).to.be.bignumber.equal(transferAmount);
done();
});
await zeroEx.token.transferAsync(tokenAddress, coinbase, addressWithoutFunds, transferAmount);
})().catch(done);
});
it('Should receive the Approval event when allowance is being set', (done: DoneCallback) => {
(async () => {
const zeroExEvent = await zeroEx.token.subscribeAsync(
tokenAddress, TokenEvents.Approval, subscriptionOpts, indexFilterValues);
zeroExEvent.watch((err: Error, event: ContractEvent) => {
expect(err).to.be.null();
expect(event).to.not.be.undefined();
const args = event.args as ApprovalContractEventArgs;
expect(args._owner).to.be.equal(coinbase);
expect(args._spender).to.be.equal(addressWithoutFunds);
expect(args._value).to.be.bignumber.equal(allowanceAmount);
done();
});
await zeroEx.token.setAllowanceAsync(tokenAddress, coinbase, addressWithoutFunds, allowanceAmount);
})().catch(done);
});
it('Outstanding subscriptions are cancelled when zeroEx.setProviderAsync called', (done: DoneCallback) => {
(async () => {
const eventSubscriptionToBeCancelled = await zeroEx.token.subscribeAsync(
tokenAddress, TokenEvents.Transfer, subscriptionOpts, indexFilterValues);
eventSubscriptionToBeCancelled.watch((err: Error, event: ContractEvent) => {
done(new Error('Expected this subscription to have been cancelled'));
});
const newProvider = web3Factory.getRpcProvider();
await zeroEx.setProviderAsync(newProvider);
const eventSubscriptionToStay = await zeroEx.token.subscribeAsync(
tokenAddress, TokenEvents.Transfer, subscriptionOpts, indexFilterValues);
eventSubscriptionToStay.watch((err: Error, event: ContractEvent) => {
expect(err).to.be.null();
expect(event).to.not.be.undefined();
done();
});
await zeroEx.token.transferAsync(tokenAddress, coinbase, addressWithoutFunds, transferAmount);
})().catch(done);
});
it('Should stop watch for events when stopWatchingAsync called on the eventEmitter', (done: DoneCallback) => {
(async () => {
const eventSubscriptionToBeStopped = await zeroEx.token.subscribeAsync(
tokenAddress, TokenEvents.Transfer, subscriptionOpts, indexFilterValues);
eventSubscriptionToBeStopped.watch((err: Error, event: ContractEvent) => {
done(new Error('Expected this subscription to have been stopped'));
});
await eventSubscriptionToBeStopped.stopWatchingAsync();
await zeroEx.token.transferAsync(tokenAddress, coinbase, addressWithoutFunds, transferAmount);
done();
})().catch(done);
});
it('Should wrap all event args BigNumber instances in a newer version of BigNumber', (done: DoneCallback) => {
(async () => {
const zeroExEvent = await zeroEx.token.subscribeAsync(
tokenAddress, TokenEvents.Transfer, subscriptionOpts, indexFilterValues);
zeroExEvent.watch((err: Error, event: ContractEvent) => {
const args = event.args as TransferContractEventArgs;
expect(args._value.isBigNumber).to.be.true();
done();
});
await zeroEx.token.transferAsync(tokenAddress, coinbase, addressWithoutFunds, transferAmount);
})().catch(done);
});
});
});
