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
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
import { assetDataUtils } from '@0xproject/order-utils';
import { BigNumber } from '@0xproject/utils';
import { Web3Wrapper } from '@0xproject/web3-wrapper';
import { Provider } from 'ethereum-types';
import * as _ from 'lodash';
import { DummyERC20TokenContract } from '../../generated_contract_wrappers/dummy_erc20_token';
import { ERC20ProxyContract } from '../../generated_contract_wrappers/erc20_proxy';
import { artifacts } from './artifacts';
import { constants } from './constants';
import { ERC20BalancesByOwner } from './types';
import { txDefaults } from './web3_wrapper';
export class ERC20Wrapper {
private readonly _tokenOwnerAddresses: string[];
private readonly _contractOwnerAddress: string;
private readonly _web3Wrapper: Web3Wrapper;
private readonly _provider: Provider;
private readonly _dummyTokenContracts: DummyERC20TokenContract[];
private _proxyContract?: ERC20ProxyContract;
private _proxyIdIfExists?: string;
/**
* Instanitates an ERC20Wrapper
* @param provider Web3 provider to use for all JSON RPC requests
* @param tokenOwnerAddresses Addresses that we want to endow as owners for dummy ERC20 tokens
* @param contractOwnerAddress Desired owner of the contract
* Instance of ERC20Wrapper
*/
constructor(provider: Provider, tokenOwnerAddresses: string[], contractOwnerAddress: string) {
this._dummyTokenContracts = [];
this._web3Wrapper = new Web3Wrapper(provider);
this._provider = provider;
this._tokenOwnerAddresses = tokenOwnerAddresses;
this._contractOwnerAddress = contractOwnerAddress;
}
public async deployDummyTokensAsync(
numberToDeploy: number,
decimals: BigNumber,
): Promise<DummyERC20TokenContract[]> {
for (let i = 0; i < numberToDeploy; i++) {
this._dummyTokenContracts.push(
await DummyERC20TokenContract.deployFrom0xArtifactAsync(
artifacts.DummyERC20Token,
this._provider,
txDefaults,
constants.DUMMY_TOKEN_NAME,
constants.DUMMY_TOKEN_SYMBOL,
decimals,
constants.DUMMY_TOKEN_TOTAL_SUPPLY,
),
);
}
return this._dummyTokenContracts;
}
public async deployProxyAsync(): Promise<ERC20ProxyContract> {
this._proxyContract = await ERC20ProxyContract.deployFrom0xArtifactAsync(
artifacts.ERC20Proxy,
this._provider,
txDefaults,
);
this._proxyIdIfExists = await this._proxyContract.getProxyId.callAsync();
return this._proxyContract;
}
public getProxyId(): string {
this._validateProxyContractExistsOrThrow();
return this._proxyIdIfExists as string;
}
public async setBalancesAndAllowancesAsync(): Promise<void> {
this._validateDummyTokenContractsExistOrThrow();
this._validateProxyContractExistsOrThrow();
for (const dummyTokenContract of this._dummyTokenContracts) {
for (const tokenOwnerAddress of this._tokenOwnerAddresses) {
await this._web3Wrapper.awaitTransactionSuccessAsync(
await dummyTokenContract.setBalance.sendTransactionAsync(
tokenOwnerAddress,
constants.INITIAL_ERC20_BALANCE,
{ from: this._contractOwnerAddress },
),
constants.AWAIT_TRANSACTION_MINED_MS,
);
await this._web3Wrapper.awaitTransactionSuccessAsync(
await dummyTokenContract.approve.sendTransactionAsync(
(this._proxyContract as ERC20ProxyContract).address,
constants.INITIAL_ERC20_ALLOWANCE,
{ from: tokenOwnerAddress },
),
constants.AWAIT_TRANSACTION_MINED_MS,
);
}
}
}
public async getBalanceAsync(userAddress: string, assetData: string): Promise<BigNumber> {
const tokenContract = this._getTokenContractFromAssetData(assetData);
const balance = new BigNumber(await tokenContract.balanceOf.callAsync(userAddress));
return balance;
}
public async setBalanceAsync(userAddress: string, assetData: string, amount: BigNumber): Promise<void> {
const tokenContract = this._getTokenContractFromAssetData(assetData);
await this._web3Wrapper.awaitTransactionSuccessAsync(
await tokenContract.setBalance.sendTransactionAsync(userAddress, amount, {
from: this._contractOwnerAddress,
}),
constants.AWAIT_TRANSACTION_MINED_MS,
);
}
public async getProxyAllowanceAsync(userAddress: string, assetData: string): Promise<BigNumber> {
const tokenContract = this._getTokenContractFromAssetData(assetData);
const proxyAddress = (this._proxyContract as ERC20ProxyContract).address;
const allowance = new BigNumber(await tokenContract.allowance.callAsync(userAddress, proxyAddress));
return allowance;
}
public async setAllowanceAsync(userAddress: string, assetData: string, amount: BigNumber): Promise<void> {
const tokenContract = this._getTokenContractFromAssetData(assetData);
const proxyAddress = (this._proxyContract as ERC20ProxyContract).address;
await this._web3Wrapper.awaitTransactionSuccessAsync(
await tokenContract.approve.sendTransactionAsync(proxyAddress, amount, {
from: userAddress,
}),
constants.AWAIT_TRANSACTION_MINED_MS,
);
}
public async getBalancesAsync(): Promise<ERC20BalancesByOwner> {
this._validateDummyTokenContractsExistOrThrow();
const balancesByOwner: ERC20BalancesByOwner = {};
const balances: BigNumber[] = [];
const balanceInfo: Array<{ tokenOwnerAddress: string; tokenAddress: string }> = [];
for (const dummyTokenContract of this._dummyTokenContracts) {
for (const tokenOwnerAddress of this._tokenOwnerAddresses) {
balances.push(await dummyTokenContract.balanceOf.callAsync(tokenOwnerAddress));
balanceInfo.push({
tokenOwnerAddress,
tokenAddress: dummyTokenContract.address,
});
}
}
_.forEach(balances, (balance, balanceIndex) => {
const tokenAddress = balanceInfo[balanceIndex].tokenAddress;
const tokenOwnerAddress = balanceInfo[balanceIndex].tokenOwnerAddress;
if (_.isUndefined(balancesByOwner[tokenOwnerAddress])) {
balancesByOwner[tokenOwnerAddress] = {};
}
const wrappedBalance = new BigNumber(balance);
balancesByOwner[tokenOwnerAddress][tokenAddress] = wrappedBalance;
});
return balancesByOwner;
}
public addDummyTokenContract(dummy: DummyERC20TokenContract): void {
if (!_.isUndefined(this._dummyTokenContracts)) {
this._dummyTokenContracts.push(dummy);
}
}
public addTokenOwnerAddress(address: string): void {
this._tokenOwnerAddresses.push(address);
}
public getTokenOwnerAddresses(): string[] {
return this._tokenOwnerAddresses;
}
public getTokenAddresses(): string[] {
const tokenAddresses = _.map(this._dummyTokenContracts, dummyTokenContract => dummyTokenContract.address);
return tokenAddresses;
}
private _getTokenContractFromAssetData(assetData: string): DummyERC20TokenContract {
const erc20ProxyData = assetDataUtils.decodeERC20AssetData(assetData);
const tokenAddress = erc20ProxyData.tokenAddress;
const tokenContractIfExists = _.find(this._dummyTokenContracts, c => c.address === tokenAddress);
if (_.isUndefined(tokenContractIfExists)) {
throw new Error(`Token: ${tokenAddress} was not deployed through ERC20Wrapper`);
}
return tokenContractIfExists;
}
private _validateDummyTokenContractsExistOrThrow(): void {
if (_.isUndefined(this._dummyTokenContracts)) {
throw new Error('Dummy ERC20 tokens not yet deployed, please call "deployDummyTokensAsync"');
}
}
private _validateProxyContractExistsOrThrow(): void {
if (_.isUndefined(this._proxyContract)) {
throw new Error('ERC20 proxy contract not yet deployed, please call "deployProxyAsync"');
}
}
}
|
