This guide offers a technical walkthrough of the Helix API guide, showing how to programmatically interact with the Helix orderbook trading engine on the Helix Injective DEX.
Step 1: Setting Up Your Environment
First, ensure you have an Injective wallet and API keys generated from your account settings on the Helix Official platform. You'll be using gRPC or REST endpoints to communicate with the protocol.
Step 2: Connecting to Market Data Streams
Helix provides real-time WebSocket streams for orderbook updates, trades, and positions. This is crucial for any high-frequency strategy.
JavaScript
// Example: Subscribing to the SOL/USDT orderbook
const marketId = "0x..."; // Market ID for SOL/USDT
const stream = helix.streamOrderbook(marketId);
stream.on('data', (update) => {
console.log('New orderbook update:', update);
});
Step 3: Placing a Gas-Free Limit Order
All order creation and cancellation is handled off-chain by the matching engine, enabling Helix zero gas fees.
Construct a MsgCreateLimitOrder message.
Specify the market ID, price, quantity, and direction (BUY/SELL).
Sign this message with your private key and submit it via the REST or gRPC endpoint.
The order will instantly appear on the order book. This architecture provides the performance of a CEX with the self-custody of a DEX. For a comprehensive overview, see the Full Official Documentation.
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