The WebSocket API provides real-time order tracking on Solana. For applications that need instant feedback on order status, WebSocket eliminates the latency and overhead of polling.

## Why Use WebSocket on Solana?

Solana's fast block times (~400ms) make real-time tracking particularly valuable:

- **Instant Notifications** - Know immediately when your order is filled
- **Transaction Details** - Each event includes the Solana transaction signature for verification
- **Efficient Monitoring** - Track multiple orders with a single connection

## Order Events

The Solana WebSocket API provides three event types:

### create

Emitted when your escrow transaction is confirmed on-chain. Includes the transaction signature and slot number.

### fill

Emitted when a resolver fills your order. Contains the resolver's address and the amounts exchanged.

### cancel

Emitted when an order is cancelled, either by the maker or by a resolver cleaning up an expired order.

## Interactive Code Example

Explore the complete implementation — this example demonstrates creating an order and tracking it via WebSocket events:

<stackblitz example="intent-swap" file="src/solana/websocket-order-tracking.ts" />