132 lines
3.1 KiB
JavaScript
132 lines
3.1 KiB
JavaScript
const assert = require('assert');
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const request = require('request');
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const {signMessage} = require('./utility.js');
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const baseUrls = {
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livenet: 'https://api.bybit.com',
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testnet: 'https://api-testnet.bybit.com'
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};
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module.exports = class Request {
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constructor(key, secret, livenet=false, options={}) {
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this.baseUrl = baseUrls[livenet === true ? 'livenet' : 'testnet'];
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this._timeOffset = null;
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this._syncTimePromise = null;
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this.options = {
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recv_window: 5000,
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sync_interval_ms: 3600000,
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...options
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}
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if(key) assert(secret, 'Secret is required for private enpoints');
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this._syncTime();
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setInterval(this._syncTime.bind(this), parseInt(this.options.sync_interval_ms));
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this.key = key;
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this.secret = secret;
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}
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async get(endpoint, params) {
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const result = await this._call('GET', endpoint, params);
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return result;
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}
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async post(endpoint, params) {
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const result = await this._call('POST', endpoint, params);
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return result;
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}
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async getTimeOffset() {
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const start = Date.now();
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const result = await this.get('/v2/public/time');
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const end = Date.now();
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return Math.ceil((result.time_now * 1000) - end + ((end - start) / 2));
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}
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async _call(method, endpoint, params) {
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const publicEndpoint = endpoint.startsWith('/v2/public');
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if(!publicEndpoint) {
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if(!this.key || !this.secret) throw new Error('Private endpoints require api and private keys set');
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if(this._timeOffset === null) await this._syncTime();
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params = this._signRequest(params);
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}
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const options = {
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url: [this.baseUrl, endpoint].join('/'),
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method: method,
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json: true
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};
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switch(method) {
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case 'GET':
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options.qs = params
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break;
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case 'POST':
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options.body = params
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break;
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}
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return new Promise((resolve, reject) => {
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request(options, function callback(error, response, body) {
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if(!error && response.statusCode == 200) {
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resolve(body);
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} else if(error) {
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reject(error);
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}
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});
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});
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}
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_signRequest(data) {
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const params = {
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...data,
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api_key: this.key,
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timestamp: Date.now() + this._timeOffset
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};
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// Optional, set to 5000 by default. Increase if timestamp/recv_window errors are seen.
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if(this.options.recv_window && !params.recv_window) {
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params.recv_window = this.options.recv_window;
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}
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if(this.key && this.secret) {
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params.sign = signMessage(this._serializeParams(params), this.secret);
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}
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return params;
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}
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_serializeParams(params) {
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return Object.keys(params)
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.sort()
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.map(key => `${key}=${params[key]}`)
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.join('&');
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}
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async _syncTime() {
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if(this._syncTimePromise !== null) return this._syncTimePromise;
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this._syncTimePromise = new Promise(async (resolve, reject) => {
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try {
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this._timeOffset = await this.getTimeOffset();
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this._syncTimePromise = null;
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resolve();
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} catch(err) {
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reject(err);
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}
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});
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return this._syncTimePromise;
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}
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}
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