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Node.js & JavaScript SDK for Binance REST APIs & WebSockets, with TypeScript & browser support, integration tests, beautification & more.

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# Node.js & JavaScript SDK for Binance REST APIs & WebSockets

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[1]: https://www.npmjs.com/package/binance

> [!TIP]
> Upcoming change: As part of the [Siebly.io](https://siebly.io/) brand, this SDK is now hosted under our [Siebly.io GitHub organisation](https://github.com/sieblyio). The migration is seamless and requires no user changes.

Updated & performant JavaScript & Node.js SDK for the Binance REST APIs and WebSockets:

- Professional, robust & performant Binance SDK with leading trading volume in production (livenet).
- Extensive integration with Binance REST APIs, WebSockets & WebSocket APIs.
- Complete TypeScript support (with type declarations for all API requests & responses).
- Supports Binance REST APIs for Binance Spot, Margin, Isolated Margin, Options, USDM & CoinM Futures.
  - Strongly typed requests and responses.
  - Automated end-to-end tests on most API calls, ensuring no breaking changes are released to npm.
- Actively maintained with a modern, promise-driven interface.
- Support for all authentication mechanisms available on Binance:
  - HMAC
  - RSA
  - Ed25519 (required for WS API login, else each request is signed).
  - Passing a private key as a secret will automatically detect whether to switch to RSA or Ed25519 authentication.
- Supports WebSockets for all available product groups on Binance including Spot, Margin, Isolated Margin, Portfolio, Options, USDM & CoinM Futures.
  - Event driven messaging.
  - Smart WebSocket persistence
    - Automatically handle silent WebSocket disconnections through timed heartbeats, including the scheduled 24hr disconnect.
    - Automatically handle listenKey persistence and expiration/refresh.
    - Emit `reconnected` event when dropped connection is restored.
  - Strongly typed on most WebSocket events, with typeguards available for TypeScript users.
  - Optional:
    - Automatic beautification of WebSocket events (from one-letter keys to descriptive words, and strings with floats to numbers).
    - Automatic beautification of REST responses (parsing numbers in strings to numbers).
- Supports WebSocket API on all available product groups, including Spot & Futures:
  - Use the WebsocketClient's event-driven `sendWSAPIRequest()` method, or;
  - Use the WebsocketAPIClient for a REST-like experience. Use the WebSocket API like a REST API! See [examples/ws-api-client.ts](./examples/ws-api-client.ts) for a demonstration.
- Heavy automated end-to-end testing with real API calls.
  - End-to-end testing before any release.
  - Real API calls in e2e tests.
- Proxy support via axios integration.
- Active community support & collaboration in telegram: [Node.js Algo Traders](https://t.me/nodetraders).
- QuickStart Guide: [Binance JavaScript QuickStart Guide](https://siebly.io/sdk/binance/javascript)
- Binance JavaScript Tutorial: [Binance JavaScript REST API & WebSocket Tutorial](https://siebly.io/sdk/binance/javascript/tutorial)

## Table of Contents

- [Installation](#installation)
- [Examples](#examples)
  - [REST API Examples](./examples/REST)
  - [WebSocket Examples](./examples/WebSockets)
    - [WebSocket Consumers](./examples/WebSockets/)
    - [WebSocket API](./examples/WebSockets/ws-api-client.ts)
- [Issues & Discussion](#issues--discussion)
- [Related Projects](#related-projects)
- [Documentation Links](#documentation)
- [Usage](#usage)
  - [Demo Trading vs Testnet](#demo-trading-vs-testnet)
  - [REST API Clients](#rest-api-clients)
    - [REST Main Client](#rest-main-client)
    - [REST USD-M Futures](#rest-usd-m-futures)
    - [REST COIN-M Futures](#rest-coin-m-futures)
    - [REST Portfolio Margin](#rest-portfolio-margin)
  - [WebSockets](#websockets)
    - [WebSocket Consumers](#websocket-consumers)
    - [WebSocket API](#websocket-api)
      - [Event Driven API](#event-driven-api)
      - [Promise Driven API](#async-await-api)
  - [Market Maker Endpoints](#market-maker-endpoints)
    - [Using Market Maker Endpoints](#using-market-maker-endpoints)
    - [Best practice](#best-practice)
  - [Customise Logging](#customise-logging)
  - [Frontend Usage](#browserfrontend-usage)
    - [Import](#import)
    - [Webpack](#webpack)
- [LLMs & AI](#use-with-llms--ai)
- [Contributions & Thanks](#contributions--thanks)

## Installation

`npm install binance --save`

## Examples

Refer to the [examples](./examples) folder for implementation demos.

## Issues & Discussion

- Issues? Check the [issues tab](https://github.com/sieblyio/binance/issues).
- Discuss & collaborate with other node devs? Join our [Node.js Algo Traders](https://t.me/nodetraders) engineering community on telegram.
- Questions about Binance APIs & WebSockets? Ask in the official [Binance API](https://t.me/binance_api_english) group on telegram.
- Follow our announcement channel for real-time updates on [X/Twitter](https://x.com/sieblyio)

## Related Projects

Check out our JavaScript/TypeScript/Node.js SDKs & Projects:

- Visit our website: [https://Siebly.io](https://siebly.io/)
- Try our REST API & WebSocket SDKs published on npmjs:
  - [Bybit JavaScript SDK: bybit-api](https://www.npmjs.com/package/bybit-api)
  - [Kraken JavaScript SDK: @siebly/kraken-api](https://www.npmjs.com/package/@siebly/kraken-api)
  - [OKX JavaScript SDK: okx-api](https://www.npmjs.com/package/okx-api)
  - [Binance JavaScript SDK: binance](https://www.npmjs.com/package/binance)
  - [Gate (gate.com) JavaScript SDK: gateio-api](https://www.npmjs.com/package/gateio-api)
  - [Bitget JavaScript SDK: bitget-api](https://www.npmjs.com/package/bitget-api)
  - [Kucoin JavaScript SDK: kucoin-api](https://www.npmjs.com/package/kucoin-api)
  - [Coinbase JavaScript SDK: coinbase-api](https://www.npmjs.com/package/coinbase-api)
  - [HTX JavaScript SDK: @siebly/htx-api](https://www.npmjs.com/package/@siebly/htx-api)
- Try my misc utilities:
  - [OrderBooks Node.js: orderbooks](https://www.npmjs.com/package/orderbooks)
  - [Crypto Exchange Account State Cache: accountstate](https://www.npmjs.com/package/accountstate)
- Check out my examples:
  - [awesome-crypto-examples Node.js](https://github.com/sieblyio/awesome-crypto-examples)

## Documentation

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

- Binance API Documentation
  - [ Spot ](https://developers.binance.com/docs/binance-spot-api-docs)
  - [ Derivatives ](https://developers.binance.com/docs/derivatives)
  - [ Margin ](https://developers.binance.com/docs/margin_trading)
  - [ Wallet ](https://developers.binance.com/docs/wallet)
- [Find all products here](https://developers.binance.com/en)
- [REST Endpoint Function List](./docs/endpointFunctionList.md)
- [TSDoc Documentation (autogenerated using typedoc)](https://tsdocs.dev/docs/binance)

## Structure

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

- [src](./src) - the whole connector written in typescript
- [lib](./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](./dist) - the packed bundle of the project for use in browser environments.

---

# Usage

Create API credentials at Binance

- [Livenet](https://www.binance.com/en/support/faq/360002502072?ref=IVRLUZJO)
- [Testnet](https://testnet.binance.vision/).
- [Testnet Futures](testnet.binancefuture.com).
- [Demo Trading](https://www.binance.com/en/support/faq/how-to-test-my-functions-on-binance-spot-test-network-ab78f9a1b8824cf0a106b4229c76496d) - Uses real market data with simulated trading.

### Demo Trading vs Testnet

Binance offers two testing environments:

- **Demo Trading**: Uses real market data but simulated trading. This is ideal for testing strategies since market conditions match production. Available for Spot, USD-M Futures, and COIN-M Futures.
- **Testnet**: Separate environment with simulated market data. Market conditions are very different from real markets and not recommended for strategy testing.

To use demo trading, simply set `demoTrading: true` in the client options. See the [demo trading examples](./examples/REST/rest-spot-demo.ts) for more information.

## REST API Clients

There are several REST API modules as there are some differences in each API group.

1. `MainClient` for most APIs, including: spot, margin, isolated margin, mining, BLVT, BSwap, Fiat & sub-account management.
2. `USDMClient` for USD-M futures APIs.
3. `CoinMClient` for COIN-M futures APIs.
4. `PortfolioClient` for Portfolio Margin APIs.

Vanilla Options is not yet available. Please get in touch if you're looking for this.

### REST Main Client

The MainClient covers all endpoints under the main "api\*.binance.com" subdomains, including but not limited to endpoints in the following product groups:

- Spot
- Cross & isolated margin
- Convert
- Wallet
- Futures management (transfers & history)
- Sub account management
- Misc transfers
- Auto & dual invest
- Staking
- Mining
- Loans & VIP loans
- Simple Earn
- NFTs
- C2C
- Exchange Link
- Alpha trading

Refer to the following links for a complete list of available endpoints:

- [Binance Node.js & JavaScript SDK Endpoint Map](https://github.com/sieblyio/binance/blob/master/docs/endpointFunctionList.md)
- [Binance Spot API Docs](https://developers.binance.com/docs/binance-spot-api-docs/rest-api/general-endpoints)

Start by importing the `MainClient` class. API credentials are optional, unless you plan on making private API calls. More Node.js & JavaScript examples for Binance's REST APIs & WebSockets can be found in the [examples](./examples) folder on GitHub.

```javascript
import { MainClient } from 'binance';

// or, if you prefer `require()`:
// const { MainClient } = require('binance');

const API_KEY = 'xxx';
const API_SECRET = 'yyy';

const client = new MainClient({
  api_key: API_KEY,
  api_secret: API_SECRET,
  // Connect to testnet environment
  // testnet: true,
});

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

client
  .getExchangeInfo()
  .then((result) => {
    console.log('getExchangeInfo inverse result: ', result);
  })
  .catch((err) => {
    console.error('getExchangeInfo inverse error: ', err);
  });
```

See [main-client.ts](./src/main-client.ts) for further information on the available REST API endpoints for spot/margin/etc.

### REST USD-M Futures

Start by importing the USDM client. API credentials are optional, unless you plan on making private API calls.

```javascript
import { USDMClient } from 'binance';

// or, if you prefer `require()`:
// const { USDMClient } = require('binance');

const API_KEY = 'xxx';
const API_SECRET = 'yyy';

const client = new USDMClient({
  api_key: API_KEY,
  api_secret: API_SECRET,
  // Connect to testnet environment
  // testnet: true,
});

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

client
  .submitNewOrder({
    side: 'SELL',
    symbol: 'BTCUSDT',
    type: 'MARKET',
    quantity: 0.001,
  })
  .then((result) => {
    console.log('submitNewOrder result: ', result);
  })
  .catch((err) => {
    console.error('submitNewOrder error: ', err);
  });
```

See [usdm-client.ts](./src/usdm-client.ts) for further information.

### REST COIN-M Futures

Start by importing the coin-m client. API credentials are optional, though an error is thrown when attempting any private API calls without credentials.

```javascript
import { CoinMClient } from 'binance';

// or, if you prefer `require()`:
// const { CoinMClient } = require('binance');

const API_KEY = 'xxx';
const API_SECRET = 'yyy';

const client = new CoinMClient({
  api_key: API_KEY,
  api_secret: API_SECRET,
  // Connect to testnet environment
  // testnet: true,
});

client
  .getSymbolOrderBookTicker()
  .then((result) => {
    console.log('getSymbolOrderBookTicker result: ', result);
  })
  .catch((err) => {
    console.error('getSymbolOrderBookTicker error: ', err);
  });
```

See [coinm-client.ts](./src/coinm-client.ts) for further information.

### REST Portfolio Margin

Start by importing the Portfolio client. API credentials are optional, though an error is thrown when attempting any private API calls without credentials.

```javascript
import { PortfolioClient } from 'binance';

// or, if you prefer `require()`:
// const { PortfolioClient } = require('binance');

const API_KEY = 'xxx';
const API_SECRET = 'yyy';

const client = new PortfolioClient({
  api_key: API_KEY,
  api_secret: API_SECRET,
  // Connect to testnet environment
  // testnet: true,
});

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

client
  .submitNewUMOrder({
    side: 'SELL',
    symbol: 'BTCUSDT',
    type: 'MARKET',
    quantity: 0.001,
  })
  .then((result) => {
    console.log('submitNewUMOrder result: ', result);
  })
  .catch((err) => {
    console.error('submitNewUMOrder error: ', err);
  });
```

See [portfolio-client.ts](./src/portfolio-client.ts) for further information.

## WebSockets

### WebSocket Consumers

All websockets are accessible via the shared `WebsocketClient`. As before, API credentials are optional unless the user data stream is required.

The below example demonstrates connecting as a consumer, to receive WebSocket events from Binance:

```javascript
import { WebsocketClient } from 'binance';

// or, if you prefer `require()`:
// const { WebsocketClient } = require('binance');

const API_KEY = 'xxx';
const API_SECRET = 'yyy';

/**
 * The WebsocketClient will manage individual connections for you, under the hood.
 * Just make an instance of the WS Client and subscribe to topics. It'll handle the rest.
 */
const wsClient = new WebsocketClient({
  api_key: key,
  api_secret: secret,
  // Optional: when enabled, the SDK will try to format incoming data into more readable objects.
  // Beautified data is emitted via the "formattedMessage" event
  beautify: true,
  // Disable ping/pong ws heartbeat mechanism (not recommended)
  // disableHeartbeat: true,
  // Connect to testnet environment
  // testnet: true,
});

// receive raw events
wsClient.on('message', (data) => {
  console.log('raw message received ', JSON.stringify(data, null, 2));
});

// notification when a connection is opened
wsClient.on('open', (data) => {
  console.log('connection opened open:', data.wsKey, data.wsUrl);
});

// receive formatted events with beautified keys. Any "known" floats stored in strings as parsed as floats.
wsClient.on('formattedMessage', (data) => {
  console.log('formattedMessage: ', data);
});

// read response to command sent via WS stream (e.g LIST_SUBSCRIPTIONS)
wsClient.on('response', (data) => {
  console.log('log response: ', JSON.stringify(data, null, 2));
});

// receive notification when a ws connection is reconnecting automatically
wsClient.on('reconnecting', (data) => {
  console.log('ws automatically reconnecting.... ', data?.wsKey);
});

// receive notification that a reconnection completed successfully (e.g use REST to check for missing data)
wsClient.on('reconnected', (data) => {
  console.log('ws has reconnected ', data?.wsKey);
});

// Recommended: receive error events (e.g. first reconnection failed)
wsClient.on('exception', (data) => {
  console.log('ws saw error ', data?.wsKey);
});

/**
 * Subscribe to public topics either one at a time or many in an array
 */

// E.g. one at a time, routed to the coinm futures websockets:
wsClient.subscribe('btcusd@indexPrice', 'coinm');
wsClient.subscribe('btcusd@miniTicker', 'coinm');

// Or send many topics at once to a stream, e.g. the usdm futures stream:
wsClient.subscribe(
  ['btcusdt@aggTrade', 'btcusdt@markPrice', '!miniTicker@arr'],
  'usdm',
);

// spot & margin topics should go to "main"
// (similar how the MainClient is for REST APIs in that product group)
wsClient.subscribe(
  [
    // All Market Rolling Window Statistics Streams
    // https://developers.binance.com/docs/binance-spot-api-docs/web-socket-streams#all-market-rolling-window-statistics-streams
    '!ticker_1h@arr',
    // Individual Symbol Book Ticker Streams
    // https://developers.binance.com/docs/binance-spot-api-docs/web-socket-streams#individual-symbol-book-ticker-streams
    'btcusdt@bookTicker',
    // Average Price
    // https://developers.binance.com/docs/binance-spot-api-docs/web-socket-streams#average-price
    'btcusdt@avgPrice',
    // Partial Book Depth Streams
    // https://developers.binance.com/docs/binance-spot-api-docs/web-socket-streams#partial-book-depth-streams
    'btcusdt@depth10@100ms',
    // Diff. Depth Stream
    // https://developers.binance.com/docs/binance-spot-api-docs/web-socket-streams#diff-depth-stream
    'btcusdt@depth',
  ],
  // Look at the `WS_KEY_URL_MAP` for a list of values here:
  // https://github.com/sieblyio/binance/blob/master/src/util/websockets/websocket-util.ts
  // "main" connects to wss://stream.binance.com:9443/stream
  // https://developers.binance.com/docs/binance-spot-api-docs/web-socket-streams
  'main',
);

/**
 * For the user data stream, these convenient subscribe methods open a dedicated
 * connection with the listen key workflow:
 */

wsClient.subscribeSpotUserDataStream();
wsClient.subscribeMarginUserDataStream();
wsClient.subscribeIsolatedMarginUserDataStream('BTCUSDT');
wsClient.subscribeUsdFuturesUserDataStream();
wsClient.subscribePortfolioMarginUserDataStream();
```

See [websocket-client.ts](./src/websocket-client.ts) for further information. Also see [ws-userdata.ts](./examples/ws-userdata.ts) for user data examples.

#### Preserving large integers in WebSocket messages

By default, messages are parsed using `JSON.parse`, which cannot precisely represent integers larger than `Number.MAX_SAFE_INTEGER`.
If you need to preserve large integers (e.g., order IDs), provide a custom parser via `customParseJSONFn`.

Example using RegEx below, although alternatives are possible too if desired. For more exampes check [ws-custom-parser.ts](./examples/WebSockets/ws-custom-parser.ts) in the examples folder:

```ts
import { WebsocketClient } from 'binance';

/**
 * ETHUSDT in futures can have unusually large orderId values, sent as numbers. See this thread for more details:
 * https://github.com/sieblyio/binance/issues/208
 *
 * If this is a problem for you, you can set a custom JSON parsing alternative using the customParseJSONFn hook injected into the WebsocketClient's constructor, as below:
 */
const ws = new WebsocketClient({
  // Default behaviour, if you don't include this:
  // customParseJSONFn: (rawEvent) => {
  //   return JSON.parse(rawEvent);
  // },

// Or, pre-process the raw event using RegEx, before using the same workflow:
  customParseJSONFn: (rawEvent) => {
    return JSON.parse(
      rawEvent.replace(/"orderId":\s*(\d+)/g, '"orderId":"$1"'),
    );
  },

// Or, use a 3rd party library such as json-bigint:
  // customParseJSONFn: (rawEvent) => {
  //   return JSONbig({ storeAsString: true }).parse(rawEvent);
  // },
});

ws.on('message', (msg) => {
  console.log(msg);
});

// If you prefer native BigInt, beware JSON.stringify will throw on BigInt values.
// Use a custom replacer or JSONbig.stringify if you need to log/serialize:
// const replacer = (_k: string, v: unknown) => typeof v === 'bigint' ? v.toString() : v;
// console.log(JSON.stringify(msg, replacer));
```

### WebSocket API

Some of the product groups available on Binance also support sending requests (commands) over an active WebSocket connection. This is called the WebSocket API.

#### Authentication

HMAC, RSA and Ed25519 keys are supported for the WebSocket API. However, only Ed25519 keys support WebSocket API login. When using HMAC or RSA keys, each WebSocket API command will need to be individually signed.

This is no issue for most use cases, but if you are latency sensitive, you should consider using Ed25519 keys. This will allow the WebSocket API client to authenticate once after the connection opens, and all commands can then be sent without additional request signatures.

#### Event Driven API

The WebSocket API is available in the [WebsocketClient](./src/websocket-client.ts) via the `sendWSAPIRequest(wsKey, command, commandParameters)` method.

Each call to this method is wrapped in a promise, which you can async await for a response, or handle it in a raw event-driven design.

#### Async Await API

The WebSocket API is also available in a promise-wrapped REST-like format. Either, as above, await any calls to `sendWSAPIRequest(...)`, or directly use the convenient WebsocketAPIClient. This class is very similar to existing REST API classes (such as the MainClient or USDMClient).

It provides one function per endpoint, feels like a REST API and will automatically route your request via an automatically persisted, authenticated and health-checked WebSocket API connection.

Below is an example showing how easy it is to use the WebSocket API without any concern for the complexity of managing WebSockets.

```typescript
import { WebsocketAPIClient } from 'binance';

// or, if you prefer `require()`:
// const { WebsocketAPIClient } = require('binance');

/**
 * Note: the WebSocket API is fastest with Ed25519 keys. HMAC & RSA will
 * require each command to be individually signed.
 *
 * Check the rest-private-ed25519.md in this folder for more guidance
 * on preparing this Ed25519 API key.
 */

const publicKey = `-----BEGIN PUBLIC KEY-----
MCexampleQTxwLU9o=
-----END PUBLIC KEY-----
`;

const privateKey = `-----BEGIN PRIVATE KEY-----
MC4CAQAexamplewqj5CzUuTy1
-----END PRIVATE KEY-----
`;

// API Key returned by binance, generated using the publicKey (above) via Binance's website
const apiKey = 'TQpJexamplerobdG';

// Make an instance of the WS API Client
const wsClient = new WebsocketAPIClient({
  api_key: apiKey,
  api_secret: privateKey,
  beautify: true,

// Enforce testnet ws connections, regardless of supplied wsKey
  // testnet: true,
});

// Optional, if you see RECV Window errors, you can use this to manage time issues. However, make sure you sync your system clock first!
// https://github.com/tiagosiebler/awesome-crypto-examples/wiki/Timestamp-for-this-request-is-outside-of-the-recvWindow
// wsClient.setTimeOffsetMs(-5000);

// Optional, see above. Can be used to prepare a connection before sending commands
// await wsClient.connectWSAPI(WS_KEY_MAP.mainWSAPI);

// Make WebSocket API calls, very similar to a REST API:

wsClient
  .getFuturesAccountBalanceV2({
    timestamp: Date.now(),
    recvWindow: 5000,
  })
  .then((result) => {
    console.log('getFuturesAccountBalanceV2 result: ', result);
  })
  .catch((err) => {
    console.error('getFuturesAccountBalanceV2 error: ', err);
  });

wsClient
  .submitNewFuturesOrder('usdm', {
    side: 'SELL',
    symbol: 'BTCUSDT',
    type: 'MARKET',
    quantity: 0.001,
    timestamp: Date.now(),
    // recvWindow: 5000,
  })
  .then((result) => {
    console.log('getFuturesAccountBalanceV2 result: ', result);
  })
  .catch((err) => {
    console.error('getFuturesAccountBalanceV2 error: ', err);
  });
```

---

## Market Maker Endpoints

Binance provides specialized market maker endpoints for qualified high-frequency trading users who have enrolled in at least one of the Futures Liquidity Provider Programs, including the USDⓈ-M Futures Maker Program, COIN-M Futures Maker Program, and USDⓈ-M Futures Taker Program.

These endpoints provide the same functionality as regular endpoints but with optimized routing for market makers. For more information about eligibility and enrollment, visit: https://www.binance.com/en/support/faq/detail/7df7f3838c3b49e692d175374c3a3283

### Using Market Maker Endpoints

To use market maker endpoints, simply add the `useMMSubdomain: true` option when initializing any client (REST API clients, WebSocket clients, or WebSocket API clients):

#### Market Maker REST API Clients

```javascript
import { USDMClient, CoinMClient } from 'binance';

// USD-M Futures with MM endpoints
const usdmClient = new USDMClient({
  api_key: API_KEY,
  api_secret: API_SECRET,
  useMMSubdomain: true, // Enable market maker endpoints
});

// COIN-M Futures with MM endpoints
const coinmClient = new CoinMClient({
  api_key: API_KEY,
  api_secret: API_SECRET,
  useMMSubdomain: true, // Enable market maker endpoints
});
```

#### Market Maker WebSocket Clients

```javascript
import { WebsocketClient, WebsocketAPIClient } from 'binance';

// WebSocket consumer with MM endpoints
const wsClient = new WebsocketClient({
  api_key: API_KEY,
  api_secret: API_SECRET,
  useMMSubdomain: true, // Enable market maker endpoints
});

// WebSocket API client with MM endpoints
const wsApiClient = new WebsocketAPIClient({
  api_key: API_KEY,
  api_secret: API_SECRET,
  useMMSubdomain: true, // Enable market maker endpoints
});
```

**Note:** Market maker endpoints are only available for futures products (USD-M and COIN-M). Spot, margin, and other product groups use the regular endpoints regardless of the `useMMSubdomain` setting. Market maker endpoints are also not available on testnet environments.

### Best practice

Since market maker endpoints are only available for some of the futures endpoints, you may need to use multiple client instances if your algorithm needs to use both regular and MM endpoints.

```javascript
import { USDMClient } from 'binance';

// MM client for USD-M futures
const futuresMMClient = new USDMClient({
  api_key: API_KEY,
  api_secret: API_SECRET,
  useMMEndpoints: true, // Use MM endpoints for futures
});

// Regular client for USD-M futures
const futuresRegularClient = new USDMClient({
  api_key: API_KEY,
  api_secret: API_SECRET,
  useMMEndpoints: false, // Use regular endpoints for futures
});
```

## Customise Logging

Pass a custom logger which supports the log methods `trace`, `info` and `error`, or override methods from the default logger as desired.

```javascript
import { WebsocketClient, DefaultLogger } from 'binance';

// or, if you prefer `require()`:
// const { WebsocketClient, DefaultLogger } = require('binance');

// Enable all logging on the trace level (disabled by default)
DefaultLogger.trace = (...params) => {
  console.trace('trace: ', params);
};

// Pass the updated logger as the 2nd parameter
const ws = new WebsocketClient(
  {
    api_key: key,
    api_secret: secret,
    beautify: true,
  },
  DefaultLogger
);

// Or, create a completely custom logger with the 3 available functions
const customLogger = {
  trace: (...params: LogParams): void => {
    console.trace(new Date(), params);
  },
  info: (...params: LogParams): void => {
    console.info(new Date(), params);
  },
  error: (...params: LogParams): void => {
    console.error(new Date(), params);
  },
}

// Pass the custom logger as the 2nd parameter
const ws = new WebsocketClient(
  {
    api_key: key,
    api_secret: secret,
    beautify: true,
  },
  customLogger
);
```

## Browser/Frontend Usage

### Import

This is the "modern" way, allowing the package to be directly imported into frontend projects with full typescript support.

1. Install these dependencies
   ```sh
   npm install crypto-browserify stream-browserify
   ```
2. Add this to your `tsconfig.json`
   ```json
   {
     "compilerOptions": {
       "paths": {
         "crypto": [
           "./node_modules/crypto-browserify"
         ],
         "stream": [
           "./node_modules/stream-browserify"
         ]
   }
   ```
3. Declare this in the global context of your application (ex: in polyfills for angular)
   ```js
   (window as any).global = window;
   ```

### Webpack

This is the "old" way of using this package on webpages. This will build a minified js bundle that can be pulled in using a script tag on a website.

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.

## Use with LLMs & AI

This SDK includes a bundled `llms.txt` file in the root of the repository. If you're developing with LLMs, use the included `llms.txt` with your LLM - it will significantly improve the LLMs understanding of how to correctly use this SDK.

This file contains AI optimised structure of all the functions in this package, and their parameters for easier use with any learning models or artificial intelligence.

---

### Contributions & Thanks

Have my projects helped you? Share the love, there are many ways you can show your thanks:

- Star & share my projects.
- Are my projects useful? Sponsor me on Github and support my effort to maintain & improve them: https://github.com/sponsors/tiagosiebler
- Have an interesting project? Get in touch & invite me to it.
- Or buy me all the coffee:
  - ETH(ERC20): `0xA3Bda8BecaB4DCdA539Dc16F9C54a592553Be06C` 
- Sign up with my referral links:
  - OKX (receive a 20% fee discount!): https://www.okx.com/join/42013004
  - Binance (receive a 20% fee discount!): https://accounts.binance.com/register?ref=OKFFGIJJ
  - HyperLiquid (receive a 4% fee discount!): https://app.hyperliquid.xyz/join/SIEBLY
  - Gate: https://www.gate.io/signup/NODESDKS?ref_type=103

<!---
old ones:
  - BTC: `1C6GWZL1XW3jrjpPTS863XtZiXL1aTK7Jk`
  - BTC(SegWit): `bc1ql64wr9z3khp2gy7dqlmqw7cp6h0lcusz0zjtls`
  - ETH(ERC20): `0xe0bbbc805e0e83341fadc210d6202f4022e50992`
  - USDT(TRC20): `TA18VUywcNEM9ahh3TTWF3sFpt9rkLnnQa
  - gate: https://www.gate.io/signup/AVNNU1WK?ref_type=103

-->

### Contributions & Pull Requests

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

## Used By

[![Repository Users Preview Image](https://dependents.info/sieblyio/binance/image)](https://github.com/sieblyio/binance/network/dependents)

## Star History

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