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
|
import * as _ from 'lodash';
import {Web3Wrapper} from '../web3_wrapper';
import {
ECSignature,
ExchangeContract,
ExchangeContractErrs,
OrderValues,
OrderAddresses,
SignedOrder,
} from '../types';
import {assert} from '../utils/assert';
import {ContractWrapper} from './contract_wrapper';
import * as ExchangeArtifacts from '../artifacts/Exchange.json';
import {ecSignatureSchema} from '../schemas/ec_signature_schema';
import {signedOrderSchema} from '../schemas/signed_order_schema';
import {ContractResponse} from '../types';
import {constants} from '../utils/constants';
export class ExchangeWrapper extends ContractWrapper {
private exchangeContractErrToMsg = {
[ExchangeContractErrs.ERROR_FILL_EXPIRED]: 'The order you attempted to fill is expired',
[ExchangeContractErrs.ERROR_CANCEL_EXPIRED]: 'The order you attempted to cancel is expired',
[ExchangeContractErrs.ERROR_FILL_NO_VALUE]: 'This order has already been filled or cancelled',
[ExchangeContractErrs.ERROR_CANCEL_NO_VALUE]: 'This order has already been filled or cancelled',
[ExchangeContractErrs.ERROR_FILL_TRUNCATION]: 'The rounding error was too large when filling this order',
[ExchangeContractErrs.ERROR_FILL_BALANCE_ALLOWANCE]: 'Maker or taker has insufficient balance or allowance',
};
constructor(web3Wrapper: Web3Wrapper) {
super(web3Wrapper);
}
public async isValidSignatureAsync(dataHex: string, ecSignature: ECSignature,
signerAddressHex: string): Promise<boolean> {
assert.isHexString('dataHex', dataHex);
assert.doesConformToSchema('ecSignature', ecSignature, ecSignatureSchema);
assert.isETHAddressHex('signerAddressHex', signerAddressHex);
const senderAddress = await this.web3Wrapper.getSenderAddressOrThrowAsync();
const exchangeInstance = await this.getExchangeInstanceOrThrowAsync();
const isValidSignature = await exchangeInstance.isValidSignature.call(
signerAddressHex,
dataHex,
ecSignature.v,
ecSignature.r,
ecSignature.s,
{
from: senderAddress,
},
);
return isValidSignature;
}
public async fillOrderAsync(signedOrder: SignedOrder, shouldCheckTransfer: boolean = true) {
assert.doesConformToSchema('signedOrder', JSON.parse(JSON.stringify(signedOrder)), signedOrderSchema);
assert.isBoolean('shouldCheckTransfer', shouldCheckTransfer);
const senderAddress = await this.web3Wrapper.getSenderAddressOrThrowAsync();
const exchangeInstance = await this.getExchangeInstanceOrThrowAsync();
const taker = _.isUndefined(signedOrder.taker) ? constants.NULL_ADDRESS : signedOrder.taker;
const orderAddresses: OrderAddresses = [
signedOrder.maker,
taker,
signedOrder.makerTokenAddress,
signedOrder.takerTokenAddress,
signedOrder.feeRecipient,
];
const orderValues: OrderValues = [
signedOrder.makerTokenAmount,
signedOrder.takerTokenAmount,
signedOrder.makerFee,
signedOrder.takerFee,
signedOrder.expirationUnixTimestampSec,
signedOrder.salt,
];
const response: ContractResponse = await exchangeInstance.fill(
orderAddresses,
orderValues,
signedOrder.fillAmount,
shouldCheckTransfer,
signedOrder.ecSignature.v,
signedOrder.ecSignature.r,
signedOrder.ecSignature.s,
{
from: senderAddress,
},
);
const errEvent = _.find(response.logs, {event: 'LogError'});
if (!_.isUndefined(errEvent)) {
const errCode = errEvent.args.errorId.toNumber();
const humanReadableErrMessage = this.exchangeContractErrToMsg[errCode];
throw new Error(humanReadableErrMessage);
}
return response;
}
private async getExchangeInstanceOrThrowAsync(): Promise<ExchangeContract> {
const contractInstance = await this.instantiateContractIfExistsAsync((ExchangeArtifacts as any));
return contractInstance as ExchangeContract;
}
}
|
