import { BlockchainLifecycle, devConstants } from '@0xproject/dev-utils'; import { BlockParamLiteral } from '@0xproject/types'; import { BigNumber } from '@0xproject/utils'; import * as chai from 'chai'; import { ExchangeContractErrs, Token, ZeroEx } 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 zeroEx = new ZeroEx(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 zeroEx.getAvailableAddressesAsync(); [coinbase, sender, recipient] = userAddresses; tokens = await zeroEx.tokenRegistry.getTokensAsync(); exampleTokenAddress = tokens[0].address; }); beforeEach(async () => { await blockchainLifecycle.startAsync(); }); afterEach(async () => { await blockchainLifecycle.revertAsync(); }); describe('#transferFromAsync', () => { beforeEach(() => { exchangeTransferSimulator = new ExchangeTransferSimulator(zeroEx.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 zeroEx.token.setProxyAllowanceAsync(exampleTokenAddress, sender, transferAmount); await zeroEx.awaitTransactionMinedAsync(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 zeroEx.token.transferAsync(exampleTokenAddress, coinbase, sender, transferAmount); await zeroEx.awaitTransactionMinedAsync(txHash); txHash = await zeroEx.token.setProxyAllowanceAsync(exampleTokenAddress, sender, transferAmount); await zeroEx.awaitTransactionMinedAsync(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 zeroEx.token.transferAsync(exampleTokenAddress, coinbase, sender, transferAmount); await zeroEx.awaitTransactionMinedAsync(txHash); txHash = await zeroEx.token.setUnlimitedProxyAllowanceAsync(exampleTokenAddress, sender); await zeroEx.awaitTransactionMinedAsync(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(zeroEx.token.UNLIMITED_ALLOWANCE_IN_BASE_UNITS); }); }); });