bybit-api

Node.js connector for the Bybit APIs and WebSockets, with TypeScript & browser support.

Installation

npm install --save bybit-api

Issues & Discussion

• Issues? Check the issues tab.
• Discuss & collaborate with other node devs? Join our Node.js Algo Traders engineering community on telegram.

Documentation

Most methods accept JS objects. These can be populated using parameters specified by Bybit's API documentation.

• Bybit API Inverse Documentation.
• Bybit API Inverse Futures Documentation.
• Bybit API Linear Documentation

Structure

This project uses typescript. Resources are stored in 3 key structures:

• src - the whole connector written in typescript
• lib - the javascript version of the project (compiled from typescript). This should not be edited directly, as it will be overwritten with each release.
• dist - the packed bundle of the project for use in browser environments.
• examples - some implementation examples & demonstrations. Contributions are welcome!

---

Usage

Create API credentials at Bybit

• Livenet
• Testnet

REST API Clients

There are three REST API modules as there are some differences in each contract type.

1. InverseClient for inverse perpetual
2. InverseFuturesClient for inverse futures
3. LinearClient for linear perpetual

REST Inverse

To use the inverse REST APIs, import the InverseClient:

const { InverseClient } = require('bybit-api');

const restClientOptions = {
  // override the max size of the request window (in ms)
  recv_window?: number;

  // how often to sync time drift with bybit servers
  sync_interval_ms?: number | string;

  // Default: false. Disable above sync mechanism if true.
  disable_time_sync?: boolean;

  // Default: false. If true, we'll throw errors if any params are undefined
  strict_param_validation?: boolean;

  // Optionally override API protocol + domain
  // e.g 'https://api.bytick.com'
  baseUrl?: string;

  // Default: true. whether to try and post-process request exceptions.
  parse_exceptions?: boolean;
};

const API_KEY = 'xxx';
const PRIVATE_KEY = 'yyy';
const useLivenet = false;

const client = new InverseClient(
  API_KEY,
  PRIVATE_KEY,

  // optional, uses testnet by default. Set to 'true' to use livenet.
  useLivenet,

  // restClientOptions,
  // requestLibraryOptions
);

client.getApiKeyInfo()
  .then(result => {
    console.log("apiKey result: ", result);
  })
  .catch(err => {
    console.error("apiKey error: ", err);
  });

client.getOrderBook({ symbol: 'BTCUSD' })
  .then(result => {
    console.log("getOrderBook inverse result: ", result);
  })
  .catch(err => {
    console.error("getOrderBook inverse error: ", err);
  });

See inverse-client.ts for further information.

REST Inverse Futures

To use the inverse futures REST APIs, import the InverseFuturesClient:

const { InverseFuturesClient } = require('bybit-api');

const API_KEY = 'xxx';
const PRIVATE_KEY = 'yyy';
const useLivenet = false;

const client = new InverseFuturesClient(
  API_KEY,
  PRIVATE_KEY,

  // optional, uses testnet by default. Set to 'true' to use livenet.
  useLivenet,

  // restClientOptions,
  // requestLibraryOptions
);

client.getApiKeyInfo()
  .then(result => {
    console.log("apiKey result: ", result);
  })
  .catch(err => {
    console.error("apiKey error: ", err);
  });

client.getOrderBook({ symbol: 'BTCUSDH21' })
  .then(result => {
    console.log("getOrderBook inverse futures result: ", result);
  })
  .catch(err => {
    console.error("getOrderBook inverse futures error: ", err);
  });

See inverse-futures-client.ts for further information.

REST Linear

To use the Linear (USDT) REST APIs, import the LinearClient:

const { LinearClient } = require('bybit-api');

const API_KEY = 'xxx';
const PRIVATE_KEY = 'yyy';
const useLivenet = false;

const client = new LinearClient(
  API_KEY,
  PRIVATE_KEY,

  // optional, uses testnet by default. Set to 'true' to use livenet.
  useLivenet,

  // restClientOptions,
  // requestLibraryOptions
);

client.getApiKeyInfo()
  .then(result => {
    console.log(result);
  })
  .catch(err => {
    console.error(err);
  });

client.getOrderBook({ symbol: 'BTCUSDT' })
  .then(result => {
    console.log("getOrderBook linear result: ", result);
  })
  .catch(err => {
    console.error("getOrderBook linear error: ", err);
  });

See linear-client.ts for further information.

REST Spot

To use the Spot REST APIs, import the SpotClient:

const { SpotClient } = require('bybit-api');

const API_KEY = 'xxx';
const PRIVATE_KEY = 'yyy';
const useLivenet = false;

const client = new SpotClient(
  API_KEY,
  PRIVATE_KEY,

  // optional, uses testnet by default. Set to 'true' to use livenet.
  useLivenet,

  // restClientOptions,
  // requestLibraryOptions
);

client.getSymbols()
  .then(result => {
    console.log(result);
  })
  .catch(err => {
    console.error(err);
  });

client.getBalances()
  .then(result => {
    console.log("getBalances result: ", result);
  })
  .catch(err => {
    console.error("getBalances error: ", err);
  });

See spot-client.ts for further information.

WebSockets

Inverse, linear & spot WebSockets can be used via a shared WebsocketClient. However, make sure to make one instance of WebsocketClient per market type (spot vs inverse vs linear vs linearfutures):

const { WebsocketClient } = require('bybit-api');

const API_KEY = 'xxx';
const PRIVATE_KEY = 'yyy';

const wsConfig = {
  key: API_KEY,
  secret: PRIVATE_KEY,

  /*
    The following parameters are optional:
  */

  // defaults to false == testnet. Set to true for livenet.
  // livenet: true

  // NOTE: to listen to multiple markets (spot vs inverse vs linear vs linearfutures) at once, make one WebsocketClient instance per market

  // defaults to inverse:
  // market: 'inverse'
  // market: 'linear'
  // market: 'spot'

  // how long to wait (in ms) before deciding the connection should be terminated & reconnected
  // pongTimeout: 1000,

  // how often to check (in ms) that WS connection is still alive
  // pingInterval: 10000,

  // how long to wait before attempting to reconnect (in ms) after connection is closed
  // reconnectTimeout: 500,

  // config options sent to RestClient (used for time sync). See RestClient docs.
  // restOptions: { },

  // config for axios used for HTTP requests. E.g for proxy support
  // requestOptions: { }

  // override which URL to use for websocket connections
  // wsUrl: 'wss://stream.bytick.com/realtime'
};

const ws = new WebsocketClient(wsConfig);

// subscribe to multiple topics at once
ws.subscribe(['position', 'execution', 'trade']);

// and/or subscribe to individual topics on demand
ws.subscribe('kline.BTCUSD.1m');

// Listen to events coming from websockets. This is the primary data source
ws.on('update', data => {
  console.log('update', data);
});

// Optional: Listen to websocket connection open event (automatic after subscribing to one or more topics)
ws.on('open', ({ wsKey, event }) => {
  console.log('connection open for websocket with ID: ' + wsKey);
});

// Optional: Listen to responses to websocket queries (e.g. the response after subscribing to a topic)
ws.on('response', response => {
  console.log('response', response);
});

// Optional: Listen to connection close event. Unexpected connection closes are automatically reconnected.
ws.on('close', () => {
  console.log('connection closed');
});

// Optional: Listen to raw error events.
// Note: responses to invalid topics are currently only sent in the "response" event.
ws.on('error', err => {
  console.error('ERR', err);
});

See websocket-client.ts for further information.

Note: for linear websockets, pass linear: true in the constructor options when instancing the WebsocketClient. To connect to both linear and inverse websockets, make two instances of the WebsocketClient.

---

Customise Logging

Pass a custom logger which supports the log methods silly, debug, notice, info, warning and error, or override methods from the default logger as desired.

const { WebsocketClient, DefaultLogger } = require('bybit-api');

// Disable all logging on the silly level
DefaultLogger.silly = () => {};

const ws = new WebsocketClient(
  { key: 'xxx', secret: 'yyy' },
  DefaultLogger
);

Browser Usage

Build a bundle using webpack:

• npm install
• npm build
• npm pack

The bundle can be found in dist/. Altough usage should be largely consistent, smaller differences will exist. Documentation is still TODO.

However, note that browser usage will lead to CORS errors due Bybit. See issue #79 for more information & alternative suggestions.

---

Contributions & Thanks

Donations

tiagosiebler

If you found this project interesting or useful, create accounts with my referral links:

• Bybit
• Binance

Or buy me a coffee using any of these:

• BTC: 1C6GWZL1XW3jrjpPTS863XtZiXL1aTK7Jk
• ETH (ERC20): 0xd773d8e6a50758e1ada699bb6c4f98bb4abf82da

pixtron

The original library was started by @pixtron. If this library helps you to trade better on bybit, feel free to donate a coffee to @pixtron:

• BTC 1Fh1158pXXudfM6ZrPJJMR7Y5SgZUz4EdF
• ETH 0x21aEdeC53ab7593b77C9558942f0c9E78131e8d7
• LTC LNdHSVtG6UWsriMYLJR3qLdfVNKwJ6GSLF

Contributions & Pull Requests

Contributions are encouraged, I will review any incoming pull requests. See the issues tab for todo items.