node-kucoin-api-ext/kucoin.js

Extended KuCoin Nodejs Api Wrapper

const qs = require('querystring');
const crypto = require('crypto');

const Kucoin = {
  init: function (config) {
    let url = '';
    if (config.environment === 'live') {
      url = 'https://api.kucoin.com';
    } else {
      url = 'https://openapi-sandbox.kucoin.com';
    }
    this.environment = config.environment;
    this.baseURL = url;
    this.secretKey = config.secretKey;
    this.apiKey = config.apiKey;
    this.passphrase = config.passphrase;
    const User = require('./lib/user');
    const Market = require('./lib/market');
    const Trade = require('./lib/trade');
    const Sockets = require('./lib/websockets');
    Object.assign(this, User, Market, Trade, Sockets);
  },
  sign: function (endpoint, params, method) {
    let header = {
      headers: {
        'Content-Type': 'application/json',
      },
    };
    let nonce = Date.now() + '';
    let strForSign = '';
    if (method === 'GET' || method === 'DELETE') {
      strForSign = nonce + method + endpoint + this.formatQuery(params);
    } else {
      strForSign = nonce + method + endpoint + JSON.stringify(params);
    }
    let signatureResult = crypto.createHmac('sha256', this.secretKey).update(strForSign).digest('base64');
    header.headers['KC-API-SIGN'] = signatureResult;
    header.headers['KC-API-TIMESTAMP'] = nonce;
    header.headers['KC-API-KEY'] = this.apiKey;
    header.headers['KC-API-PASSPHRASE'] = crypto.createHmac('sha256', this.secretKey).update(this.passphrase).digest('base64');
    header.headers['KC-API-KEY-VERSION'] = 2;
    return header;
  },
  formatQuery: function (queryObj) {
    if (JSON.stringify(queryObj).length !== 2) {
      return '?' + qs.stringify(queryObj);
    } else {
      return '';
    }
  },
};

module.exports = Kucoin;