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import { DummyERC20TokenContract, ERC20ProxyContract, ERC20TokenContract } from '@0x/abi-gen-wrappers';
import * as artifacts from '@0x/contract-artifacts';
import { BlockchainLifecycle, devConstants } from '@0x/dev-utils';
import { ExchangeContractErrs } from '@0x/types';
import { BigNumber } from '@0x/utils';
import * as chai from 'chai';
import { assetDataUtils } from '../src/asset_data_utils';
import { constants } from '../src/constants';
import { ExchangeTransferSimulator } from '../src/exchange_transfer_simulator';
import { BalanceAndProxyAllowanceLazyStore } from '../src/store/balance_and_proxy_allowance_lazy_store';
import { TradeSide, TransferType } from '../src/types';
import { chaiSetup } from './utils/chai_setup';
import { SimpleERC20BalanceAndProxyAllowanceFetcher } from './utils/simple_erc20_balance_and_proxy_allowance_fetcher';
import { provider, web3Wrapper } from './utils/web3_wrapper';
chaiSetup.configure();
const expect = chai.expect;
const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
describe('ExchangeTransferSimulator', async () => {
const transferAmount = new BigNumber(5);
let userAddresses: string[];
let dummyERC20Token: DummyERC20TokenContract;
let coinbase: string;
let sender: string;
let recipient: string;
let exampleAssetData: string;
let exchangeTransferSimulator: ExchangeTransferSimulator;
let txHash: string;
let erc20ProxyAddress: string;
before(async function(): Promise<void> {
const mochaTestTimeoutMs = 20000;
this.timeout(mochaTestTimeoutMs); // tslint:disable-line:no-invalid-this
userAddresses = await web3Wrapper.getAvailableAddressesAsync();
[coinbase, sender, recipient] = userAddresses;
const txDefaults = {
gas: devConstants.GAS_LIMIT,
from: devConstants.TESTRPC_FIRST_ADDRESS,
};
const erc20Proxy = await ERC20ProxyContract.deployFrom0xArtifactAsync(
artifacts.ERC20Proxy,
provider,
txDefaults,
);
erc20ProxyAddress = erc20Proxy.address;
const totalSupply = new BigNumber(100000000000000000000);
const name = 'Test';
const symbol = 'TST';
const decimals = new BigNumber(18);
// tslint:disable-next-line:no-unused-variable
dummyERC20Token = await DummyERC20TokenContract.deployFrom0xArtifactAsync(
artifacts.DummyERC20Token,
provider,
txDefaults,
name,
symbol,
decimals,
totalSupply,
);
exampleAssetData = assetDataUtils.encodeERC20AssetData(dummyERC20Token.address);
});
beforeEach(async () => {
await blockchainLifecycle.startAsync();
});
afterEach(async () => {
await blockchainLifecycle.revertAsync();
});
describe('#transferFromAsync', function(): void {
// HACK: For some reason these tests need a slightly longer timeout
const mochaTestTimeoutMs = 3000;
this.timeout(mochaTestTimeoutMs); // tslint:disable-line:no-invalid-this
beforeEach(() => {
const simpleERC20BalanceAndProxyAllowanceFetcher = new SimpleERC20BalanceAndProxyAllowanceFetcher(
(dummyERC20Token as any) as ERC20TokenContract,
erc20ProxyAddress,
);
const balanceAndProxyAllowanceLazyStore = new BalanceAndProxyAllowanceLazyStore(
simpleERC20BalanceAndProxyAllowanceFetcher,
);
exchangeTransferSimulator = new ExchangeTransferSimulator(balanceAndProxyAllowanceLazyStore);
});
it("throws if the user doesn't have enough allowance", async () => {
return expect(
exchangeTransferSimulator.transferFromAsync(
exampleAssetData,
sender,
recipient,
transferAmount,
TradeSide.Taker,
TransferType.Trade,
),
).to.be.rejectedWith(ExchangeContractErrs.InsufficientTakerAllowance);
});
it("throws if the user doesn't have enough balance", async () => {
txHash = await dummyERC20Token.approve.sendTransactionAsync(erc20ProxyAddress, transferAmount, {
from: sender,
});
await web3Wrapper.awaitTransactionSuccessAsync(txHash);
return expect(
exchangeTransferSimulator.transferFromAsync(
exampleAssetData,
sender,
recipient,
transferAmount,
TradeSide.Maker,
TransferType.Trade,
),
).to.be.rejectedWith(ExchangeContractErrs.InsufficientMakerBalance);
});
it('updates balances and proxyAllowance after transfer', async () => {
txHash = await dummyERC20Token.transfer.sendTransactionAsync(sender, transferAmount, {
from: coinbase,
});
await web3Wrapper.awaitTransactionSuccessAsync(txHash);
txHash = await dummyERC20Token.approve.sendTransactionAsync(erc20ProxyAddress, transferAmount, {
from: sender,
});
await web3Wrapper.awaitTransactionSuccessAsync(txHash);
await exchangeTransferSimulator.transferFromAsync(
exampleAssetData,
sender,
recipient,
transferAmount,
TradeSide.Taker,
TransferType.Trade,
);
const store = (exchangeTransferSimulator as any)._store;
const senderBalance = await store.getBalanceAsync(exampleAssetData, sender);
const recipientBalance = await store.getBalanceAsync(exampleAssetData, recipient);
const senderProxyAllowance = await store.getProxyAllowanceAsync(exampleAssetData, sender);
expect(senderBalance).to.be.bignumber.equal(0);
expect(recipientBalance).to.be.bignumber.equal(transferAmount);
expect(senderProxyAllowance).to.be.bignumber.equal(0);
});
it("doesn't update proxyAllowance after transfer if unlimited", async () => {
txHash = await dummyERC20Token.transfer.sendTransactionAsync(sender, transferAmount, {
from: coinbase,
});
await web3Wrapper.awaitTransactionSuccessAsync(txHash);
txHash = await dummyERC20Token.approve.sendTransactionAsync(
erc20ProxyAddress,
constants.UNLIMITED_ALLOWANCE_IN_BASE_UNITS,
{
from: sender,
},
);
await web3Wrapper.awaitTransactionSuccessAsync(txHash);
await exchangeTransferSimulator.transferFromAsync(
exampleAssetData,
sender,
recipient,
transferAmount,
TradeSide.Taker,
TransferType.Trade,
);
const store = (exchangeTransferSimulator as any)._store;
const senderBalance = await store.getBalanceAsync(exampleAssetData, sender);
const recipientBalance = await store.getBalanceAsync(exampleAssetData, recipient);
const senderProxyAllowance = await store.getProxyAllowanceAsync(exampleAssetData, sender);
expect(senderBalance).to.be.bignumber.equal(0);
expect(recipientBalance).to.be.bignumber.equal(transferAmount);
expect(senderProxyAllowance).to.be.bignumber.equal(constants.UNLIMITED_ALLOWANCE_IN_BASE_UNITS);
});
});
});
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