1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
|
import { BlockchainLifecycle } from '@0xproject/dev-utils';
import BigNumber from 'bignumber.js';
import * as chai from 'chai';
import { ExchangeContractErrs, Token, ZeroEx } from '../src';
import { BlockParamLiteral, 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 { web3Factory } from './utils/web3_factory';
chaiSetup.configure();
const expect = chai.expect;
const blockchainLifecycle = new BlockchainLifecycle(constants.RPC_URL);
describe('ExchangeTransferSimulator', () => {
const web3 = web3Factory.create();
const config = {
networkId: constants.TESTRPC_NETWORK_ID,
};
const zeroEx = new ZeroEx(web3.currentProvider, 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);
});
});
});
|
