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
|
import { assert } from '@0xproject/assert';
import { schemas } from '@0xproject/json-schemas';
import 'isomorphic-fetch';
import * as _ from 'lodash';
import * as queryString from 'query-string';
import { schemas as clientSchemas } from './schemas/schemas';
import {
Client,
FeesRequest,
FeesResponse,
HttpRequestOptions,
HttpRequestType,
OrderbookRequest,
OrderbookResponse,
OrdersRequest,
SignedOrder,
TokenPairsItem,
TokenPairsRequest,
} from './types';
import { relayerResponseJsonParsers } from './utils/relayer_response_json_parsers';
const TRAILING_SLASHES_REGEX = /\/+$/;
/**
* This class includes all the functionality related to interacting with a set of HTTP endpoints
* that implement the standard relayer API v0
*/
export class HttpClient implements Client {
private _apiEndpointUrl: string;
/**
* Instantiates a new HttpClient instance
* @param url The relayer API base HTTP url you would like to interact with
* @return An instance of HttpClient
*/
constructor(url: string) {
assert.isHttpUrl('url', url);
this._apiEndpointUrl = url.replace(TRAILING_SLASHES_REGEX, ''); // remove trailing slashes
}
/**
* Retrieve token pair info from the API
* @param request A TokenPairsRequest instance describing specific token information
* to retrieve
* @return The resulting TokenPairsItems that match the request
*/
public async getTokenPairsAsync(request?: TokenPairsRequest): Promise<TokenPairsItem[]> {
if (!_.isUndefined(request)) {
assert.doesConformToSchema('request', request, clientSchemas.relayerTokenPairsRequestSchema);
}
const requestOpts = {
params: request,
};
const responseJson = await this._requestAsync('/token_pairs', HttpRequestType.Get, requestOpts);
const tokenPairs = relayerResponseJsonParsers.parseTokenPairsJson(responseJson);
return tokenPairs;
}
/**
* Retrieve orders from the API
* @param request An OrdersRequest instance describing specific orders to retrieve
* @return The resulting SignedOrders that match the request
*/
public async getOrdersAsync(request?: OrdersRequest): Promise<SignedOrder[]> {
if (!_.isUndefined(request)) {
assert.doesConformToSchema('request', request, clientSchemas.relayerOrdersRequestSchema);
}
const requestOpts = {
params: request,
};
const responseJson = await this._requestAsync(`/orders`, HttpRequestType.Get, requestOpts);
const orders = relayerResponseJsonParsers.parseOrdersJson(responseJson);
return orders;
}
/**
* Retrieve a specific order from the API
* @param orderHash An orderHash generated from the desired order
* @return The SignedOrder that matches the supplied orderHash
*/
public async getOrderAsync(orderHash: string): Promise<SignedOrder> {
assert.doesConformToSchema('orderHash', orderHash, schemas.orderHashSchema);
const responseJson = await this._requestAsync(`/order/${orderHash}`, HttpRequestType.Get);
const order = relayerResponseJsonParsers.parseOrderJson(responseJson);
return order;
}
/**
* Retrieve an orderbook from the API
* @param request An OrderbookRequest instance describing the specific orderbook to retrieve
* @return The resulting OrderbookResponse that matches the request
*/
public async getOrderbookAsync(request: OrderbookRequest): Promise<OrderbookResponse> {
assert.doesConformToSchema('request', request, clientSchemas.relayerOrderBookRequestSchema);
const requestOpts = {
params: request,
};
const responseJson = await this._requestAsync('/orderbook', HttpRequestType.Get, requestOpts);
const orderbook = relayerResponseJsonParsers.parseOrderbookResponseJson(responseJson);
return orderbook;
}
/**
* Retrieve fee information from the API
* @param request A FeesRequest instance describing the specific fees to retrieve
* @return The resulting FeesResponse that matches the request
*/
public async getFeesAsync(request: FeesRequest): Promise<FeesResponse> {
assert.doesConformToSchema('request', request, schemas.relayerApiFeesPayloadSchema);
const requestOpts = {
payload: request,
};
const responseJson = await this._requestAsync('/fees', HttpRequestType.Post, requestOpts);
const fees = relayerResponseJsonParsers.parseFeesResponseJson(responseJson);
return fees;
}
/**
* Submit a signed order to the API
* @param signedOrder A SignedOrder instance to submit
*/
public async submitOrderAsync(signedOrder: SignedOrder): Promise<void> {
assert.doesConformToSchema('signedOrder', signedOrder, schemas.signedOrderSchema);
const requestOpts = {
payload: signedOrder,
};
await this._requestAsync('/order', HttpRequestType.Post, requestOpts);
}
private async _requestAsync(
path: string,
requestType: HttpRequestType,
requestOptions?: HttpRequestOptions,
): Promise<any> {
const params = _.get(requestOptions, 'params');
const payload = _.get(requestOptions, 'payload');
let query = '';
if (!_.isUndefined(params) && !_.isEmpty(params)) {
const stringifiedParams = queryString.stringify(params);
query = `?${stringifiedParams}`;
}
const url = `${this._apiEndpointUrl}/v0${path}${query}`;
const headers = new Headers({
'content-type': 'application/json',
});
const response = await fetch(url, {
method: requestType,
body: JSON.stringify(payload),
headers,
});
const json = await response.json();
if (!response.ok) {
const errorString = `${response.status} - ${response.statusText}\n${requestType} ${url}\n${JSON.stringify(
json,
)}`;
throw Error(errorString);
}
return json;
}
}
|
