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
|
import { ContractWrappers } from '@0xproject/contract-wrappers';
import { BlockchainLifecycle, devConstants, web3Factory } from '@0xproject/dev-utils';
import { BigNumber } from '@0xproject/utils';
import { Web3Wrapper } from '@0xproject/web3-wrapper';
import * as chai from 'chai';
import 'make-promises-safe';
import * as Web3 from 'web3';
import { DummyERC20TokenContract } from '../src/contract_wrappers/generated/dummy_e_r_c20_token';
import { artifacts } from '../src/utils/artifacts';
import { chaiSetup } from '../src/utils/chai_setup';
import { constants } from '../src/utils/constants';
import { provider, txDefaults, web3Wrapper } from '../src/utils/web3_wrapper';
chaiSetup.configure();
const expect = chai.expect;
const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
describe('UnlimitedAllowanceToken', () => {
let owner: string;
let spender: string;
const contractWrappers = new ContractWrappers(provider, {
networkId: constants.TESTRPC_NETWORK_ID,
});
const MAX_MINT_VALUE = new BigNumber(100000000000000000000);
let tokenAddress: string;
let token: DummyERC20TokenContract;
before(async () => {
await blockchainLifecycle.startAsync();
});
after(async () => {
await blockchainLifecycle.revertAsync();
});
before(async () => {
const accounts = await web3Wrapper.getAvailableAddressesAsync();
owner = accounts[0];
spender = accounts[1];
token = await DummyERC20TokenContract.deployFrom0xArtifactAsync(
artifacts.DummyERC20Token,
provider,
txDefaults,
constants.DUMMY_TOKEN_NAME,
constants.DUMMY_TOKEN_SYMBOL,
constants.DUMMY_TOKEN_DECIMALS,
constants.DUMMY_TOKEN_TOTAL_SUPPLY,
);
await web3Wrapper.awaitTransactionSuccessAsync(
await token.mint.sendTransactionAsync(MAX_MINT_VALUE, { from: owner }),
constants.AWAIT_TRANSACTION_MINED_MS,
);
tokenAddress = token.address;
});
beforeEach(async () => {
await blockchainLifecycle.startAsync();
});
afterEach(async () => {
await blockchainLifecycle.revertAsync();
});
describe('transfer', () => {
it('should throw if owner has insufficient balance', async () => {
const ownerBalance = await contractWrappers.token.getBalanceAsync(tokenAddress, owner);
const amountToTransfer = ownerBalance.plus(1);
return expect(token.transfer.callAsync(spender, amountToTransfer, { from: owner })).to.be.rejectedWith(
constants.REVERT,
);
});
it('should transfer balance from sender to receiver', async () => {
const receiver = spender;
const initOwnerBalance = await contractWrappers.token.getBalanceAsync(tokenAddress, owner);
const amountToTransfer = new BigNumber(1);
await contractWrappers.token.transferAsync(tokenAddress, owner, receiver, amountToTransfer);
const finalOwnerBalance = await contractWrappers.token.getBalanceAsync(tokenAddress, owner);
const finalReceiverBalance = await contractWrappers.token.getBalanceAsync(tokenAddress, receiver);
const expectedFinalOwnerBalance = initOwnerBalance.minus(amountToTransfer);
const expectedFinalReceiverBalance = amountToTransfer;
expect(finalOwnerBalance).to.be.bignumber.equal(expectedFinalOwnerBalance);
expect(finalReceiverBalance).to.be.bignumber.equal(expectedFinalReceiverBalance);
});
it('should return true on a 0 value transfer', async () => {
const didReturnTrue = await token.transfer.callAsync(spender, new BigNumber(0), {
from: owner,
});
expect(didReturnTrue).to.be.true();
});
});
describe('transferFrom', () => {
it('should throw if owner has insufficient balance', async () => {
const ownerBalance = await contractWrappers.token.getBalanceAsync(tokenAddress, owner);
const amountToTransfer = ownerBalance.plus(1);
await contractWrappers.token.setAllowanceAsync(tokenAddress, owner, spender, amountToTransfer);
return expect(
token.transferFrom.callAsync(owner, spender, amountToTransfer, {
from: spender,
}),
).to.be.rejectedWith(constants.REVERT);
});
it('should throw if spender has insufficient allowance', async () => {
const ownerBalance = await contractWrappers.token.getBalanceAsync(tokenAddress, owner);
const amountToTransfer = ownerBalance;
const spenderAllowance = await contractWrappers.token.getAllowanceAsync(tokenAddress, owner, spender);
const isSpenderAllowanceInsufficient = spenderAllowance.cmp(amountToTransfer) < 0;
expect(isSpenderAllowanceInsufficient).to.be.true();
return expect(
token.transferFrom.callAsync(owner, spender, amountToTransfer, {
from: spender,
}),
).to.be.rejectedWith(constants.REVERT);
});
it('should return true on a 0 value transfer', async () => {
const amountToTransfer = new BigNumber(0);
const didReturnTrue = await token.transferFrom.callAsync(owner, spender, amountToTransfer, {
from: spender,
});
expect(didReturnTrue).to.be.true();
});
it('should not modify spender allowance if spender allowance is 2^256 - 1', async () => {
const initOwnerBalance = await contractWrappers.token.getBalanceAsync(tokenAddress, owner);
const amountToTransfer = initOwnerBalance;
const initSpenderAllowance = contractWrappers.token.UNLIMITED_ALLOWANCE_IN_BASE_UNITS;
await contractWrappers.token.setAllowanceAsync(tokenAddress, owner, spender, initSpenderAllowance);
await contractWrappers.token.transferFromAsync(tokenAddress, owner, spender, spender, amountToTransfer, {
gasLimit: constants.MAX_TOKEN_TRANSFERFROM_GAS,
});
const newSpenderAllowance = await contractWrappers.token.getAllowanceAsync(tokenAddress, owner, spender);
expect(initSpenderAllowance).to.be.bignumber.equal(newSpenderAllowance);
});
it('should transfer the correct balances if spender has sufficient allowance', async () => {
const initOwnerBalance = await contractWrappers.token.getBalanceAsync(tokenAddress, owner);
const amountToTransfer = initOwnerBalance;
const initSpenderAllowance = initOwnerBalance;
await contractWrappers.token.setAllowanceAsync(tokenAddress, owner, spender, initSpenderAllowance);
await contractWrappers.token.transferFromAsync(tokenAddress, owner, spender, spender, amountToTransfer, {
gasLimit: constants.MAX_TOKEN_TRANSFERFROM_GAS,
});
const newOwnerBalance = await contractWrappers.token.getBalanceAsync(tokenAddress, owner);
const newSpenderBalance = await contractWrappers.token.getBalanceAsync(tokenAddress, spender);
expect(newOwnerBalance).to.be.bignumber.equal(0);
expect(newSpenderBalance).to.be.bignumber.equal(initOwnerBalance);
});
it('should modify allowance if spender has sufficient allowance less than 2^256 - 1', async () => {
const initOwnerBalance = await contractWrappers.token.getBalanceAsync(tokenAddress, owner);
const amountToTransfer = initOwnerBalance;
const initSpenderAllowance = initOwnerBalance;
await contractWrappers.token.setAllowanceAsync(tokenAddress, owner, spender, initSpenderAllowance);
await contractWrappers.token.transferFromAsync(tokenAddress, owner, spender, spender, amountToTransfer, {
gasLimit: constants.MAX_TOKEN_TRANSFERFROM_GAS,
});
const newSpenderAllowance = await contractWrappers.token.getAllowanceAsync(tokenAddress, owner, spender);
expect(newSpenderAllowance).to.be.bignumber.equal(0);
});
});
});
|
