OKX API SDK for Rust: Comprehensive Guide to Trading Integration

The OKX API SDK for Rust provides developers with a powerful toolkit for integrating with OKX's cryptocurrency exchange platform. This open-source solution offers full support for OKX's V5 API, enabling seamless interaction with both REST and WebSocket endpoints.

Key Features

• Dual API Support: Access both REST API and WebSocket API endpoints
• Type-Safe Architecture: Complete Rust type definitions with robust error handling
• Modular Design: Organized codebase following Rust's best practices

• Comprehensive Coverage: Support for all major API endpoints including:

  • Account management
  • Trading operations
  • Market data
  • Asset tracking
• Security Automation: Built-in authentication and request signing
• Connection Reliability: Automatic reconnection and heartbeat mechanisms for WebSocket
• Flexible Execution: Both synchronous and asynchronous calling patterns

Installation Guide

Add the SDK to your project via Cargo.toml:

[dependencies]
okx = "0.1.3"

For latest development version:

cargo add --git https://github.com/fairwic/okx_rs

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Getting Started

API Configuration

Set up your credentials through environment variables or .env file:

OKX_API_KEY=your_api_key
OKX_API_SECRET=your_api_secret
OKX_PASSPHRASE=your_passphrase
OKX_SIMULATED_TRADING=0  # Set to 1 for simulated trading

REST API Implementation

use okx::{create_client, Error};
use okx::api::market::MarketApi;

#[tokio::main]
async fn main() -> Result<(), Error> {
    env_logger::init();
    let credentials = Credentials::from_env().unwrap();
    let client: OkxClient = OkxClient::new(credentials).unwrap();
    
    let market = OkxMarket::new(client.clone());
    let ticker = market.get_ticker("BTC-USDT-SWAP").await?;
    println!("BTC-USDT Market Data: {:?}", ticker);
    
    Ok(())
}

WebSocket Integration

#[tokio::main]
async fn main() -> Result<(), Error> {
    env_logger::init();
    let args = Args::new().with_inst_id("BTC-USDT".to_string());
    let mut client = OkxWebsocketClient::new_public();
    
    let mut rx = client.connect().await.unwrap();
    client.subscribe(ChannelType::Tickers, args).await.unwrap();
    
    tokio::spawn(async move {
        while let Some(msg) = rx.recv().await {
            println!("Received public channel update: {:?}", msg);
        }
    });
    
    sleep(Duration::from_secs(100)).await;
    Ok(())
}

Architectural Overview

src/
├── api/
│   ├── account/     # Account operations
│   ├── asset/       # Balance inquiries
│   ├── market/      # Price data
│   └── trade/       # Order management
├── models/          # Data structures
├── client.rs        # HTTP client
├── config.rs        # Runtime configuration
└── error.rs         # Error handling

Advanced Configuration

Customize SDK behavior through programmatic configuration:

use okx::config::{Config, Credentials};

let config = Config::default()
    .with_api_url("https://www.okx.com")
    .with_simulated_trading(true);

let credentials = Credentials::new(
    "your_api_key",
    "your_api_secret",
    "your_passphrase",
    "0"  // Trading mode flag
);

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Development Workflow

# Clone repository
git clone https://github.com/fairwic/okx_rs.git
cd okx_rs

# Run tests
cargo test

# Execute examples
cargo run --example market
cargo run --example websocket

Frequently Asked Questions

What's the difference between REST and WebSocket APIs?

The REST API follows request-response pattern for one-time data retrieval, while WebSocket maintains persistent connections for real-time updates.

How do I handle rate limits?

The SDK automatically respects OKX's rate limits with built-in request queuing and retry logic.

Is simulated trading supported?

Yes, set OKX_SIMULATED_TRADING=1 to use paper trading without real funds.

What Rust versions are supported?

The SDK maintains compatibility with Rust 1.60+ stable releases.

How secure are the API credentials?

Credentials are never logged and only used for request signing. We recommend using limited-permission API keys.

Can I contribute to the project?

Absolutely! The project welcomes contributions through GitHub pull requests following MIT license terms.

License

This project is licensed under MIT - see the LICENSE file for details.