OKX Websocket Template Built with PENDAX-SDK

Introduction

This template provides a fully functional WebSocket connection for OKX exchange, leveraging the PENDAX-SDK. It simplifies real-time market data streaming and private endpoint interactions while maintaining modularity for customization.

Key Features

• Public & Private Endpoints: Supports both market data (tickers, order books) and authenticated requests (trades, account updates).
• Modular Architecture: Easily add/remove subscriptions without restructuring core logic.
• Low-Latency: Optimized for high-frequency data processing.

Setup Guide

1. Prerequisites

• Node.js (v16+)
• API Keys from OKX (Sign up here)

2. Installation

npm install

3. Configuration

Edit index.js to include your credentials:

const socketConfig = {
  apiKey: 'YOUR_API_KEY',
  secret: 'YOUR_SECRET',
  passphrase: 'YOUR_PASSPHRASE',
  isPrivate: false // Set to 'true' for private endpoints
};

Customizing Subscriptions

Adding New Channels

Example: Subscribing to BTC-USDT-SWAP tickers

function doSubscriptions(socket) {
  subscriptions.tickers = {
    name: 'tickers',
    args: [{ channel: 'tickers', instId: 'BTC-USDT-SWAP' }]
  };
  socket.subscribe(subscriptions.tickers);
}

Handling Incoming Data

Process messages in handleMessage():

case 'tickers':
  console.log('Ticker Update:', msg.data);
  break;

Best Practices

• Rate Limits: Avoid excessive subscriptions to prevent IP throttling.
• Error Handling: Implement reconnection logic for dropped sockets.
• Data Storage: Integrate databases (e.g., PostgreSQL) for historical analysis.

FAQ

Q1: How do I troubleshoot connection failures?

A: Verify API keys, network restrictions, and OKX service status. Enable debug logs in PENDAX-SDK.

Q2: Can I use this for algorithmic trading?

A: Yes! Pair this template with strategy logic (e.g., Mean Reversion signals).

Q3: Are there fees for WebSocket usage?

A: OKX does not charge for WebSocket connections, but API call limits apply.

Conclusion

This template streamlines OKX WebSocket integration, offering a balance of flexibility and performance. 👉 Explore advanced use cases or extend functionality with additional SDK modules.

Pro Tip: Regularly update PENDAX-SDK to access new features and security patches.