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import { BlockchainLifecycle, devConstants } from '@0xproject/dev-utils';
import { BlockParamLiteral, Token } from '@0xproject/types';
import { BigNumber } from '@0xproject/utils';
import * as chai from 'chai';
import 'make-promises-safe';
import { ContractWrappers, ExchangeContractErrs } from '../src';
import { TradeSide, TransferType } from '../src/types';
import { ExchangeTransferSimulator } from '../src/utils/exchange_transfer_simulator';
import { chaiSetup } from './utils/chai_setup';
import { constants } from './utils/constants';
import { provider, web3Wrapper } from './utils/web3_wrapper';
chaiSetup.configure();
const expect = chai.expect;
const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
describe('ExchangeTransferSimulator', () => {
const config = {
networkId: constants.TESTRPC_NETWORK_ID,
};
const contractWrappers = new ContractWrappers(provider, config);
const transferAmount = new BigNumber(5);
let userAddresses: string[];
let tokens: Token[];
let coinbase: string;
let sender: string;
let recipient: string;
let exampleTokenAddress: string;
let exchangeTransferSimulator: ExchangeTransferSimulator;
let txHash: string;
before(async () => {
userAddresses = await web3Wrapper.getAvailableAddressesAsync();
[coinbase, sender, recipient] = userAddresses;
tokens = await contractWrappers.tokenRegistry.getTokensAsync();
exampleTokenAddress = tokens[0].address;
});
beforeEach(async () => {
await blockchainLifecycle.startAsync();
});
afterEach(async () => {
await blockchainLifecycle.revertAsync();
});
describe('#transferFromAsync', () => {
beforeEach(() => {
exchangeTransferSimulator = new ExchangeTransferSimulator(contractWrappers.token, BlockParamLiteral.Latest);
});
it("throws if the user doesn't have enough allowance", async () => {
return expect(
exchangeTransferSimulator.transferFromAsync(
exampleTokenAddress,
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 contractWrappers.token.setProxyAllowanceAsync(exampleTokenAddress, sender, transferAmount);
await web3Wrapper.awaitTransactionSuccessAsync(txHash);
return expect(
exchangeTransferSimulator.transferFromAsync(
exampleTokenAddress,
sender,
recipient,
transferAmount,
TradeSide.Maker,
TransferType.Trade,
),
).to.be.rejectedWith(ExchangeContractErrs.InsufficientMakerBalance);
});
it('updates balances and proxyAllowance after transfer', async () => {
txHash = await contractWrappers.token.transferAsync(exampleTokenAddress, coinbase, sender, transferAmount);
await web3Wrapper.awaitTransactionSuccessAsync(txHash);
txHash = await contractWrappers.token.setProxyAllowanceAsync(exampleTokenAddress, sender, transferAmount);
await web3Wrapper.awaitTransactionSuccessAsync(txHash);
await exchangeTransferSimulator.transferFromAsync(
exampleTokenAddress,
sender,
recipient,
transferAmount,
TradeSide.Taker,
TransferType.Trade,
);
const store = (exchangeTransferSimulator as any)._store;
const senderBalance = await store.getBalanceAsync(exampleTokenAddress, sender);
const recipientBalance = await store.getBalanceAsync(exampleTokenAddress, recipient);
const senderProxyAllowance = await store.getProxyAllowanceAsync(exampleTokenAddress, 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 contractWrappers.token.transferAsync(exampleTokenAddress, coinbase, sender, transferAmount);
await web3Wrapper.awaitTransactionSuccessAsync(txHash);
txHash = await contractWrappers.token.setUnlimitedProxyAllowanceAsync(exampleTokenAddress, sender);
await web3Wrapper.awaitTransactionSuccessAsync(txHash);
await exchangeTransferSimulator.transferFromAsync(
exampleTokenAddress,
sender,
recipient,
transferAmount,
TradeSide.Taker,
TransferType.Trade,
);
const store = (exchangeTransferSimulator as any)._store;
const senderBalance = await store.getBalanceAsync(exampleTokenAddress, sender);
const recipientBalance = await store.getBalanceAsync(exampleTokenAddress, recipient);
const senderProxyAllowance = await store.getProxyAllowanceAsync(exampleTokenAddress, sender);
expect(senderBalance).to.be.bignumber.equal(0);
expect(recipientBalance).to.be.bignumber.equal(transferAmount);
expect(senderProxyAllowance).to.be.bignumber.equal(
contractWrappers.token.UNLIMITED_ALLOWANCE_IN_BASE_UNITS,
);
});
});
});
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