ensync-sdk-ws 0.4.2

WebSocket client for EnSync Engine - real-time messaging over WebSocket

EnSync WebSocket Client

WebSocket client for EnSync Engine. An alternative to the gRPC client for environments where WebSocket is preferred or required.

Installation

pip install ensync-websocket

Quick Start

from ensync_websocket import EnSyncEngine

# Initialize engine
engine = EnSyncEngine("wss://node.ensync.cloud")

# Create authenticated client
client = await engine.create_client("your-app-key")

# Publish an message
await client.publish(
    "orders/status/updated",
    ["recipient-app-id"],
    {"order_id": "123", "status": "completed"}
)

# Subscribe to messages
subscription = await client.subscribe("orders/status/updated")

async def handle_message(message):
    print(f"Received: {message['payload']}")

subscription.on(handle_message)

Features

• WebSocket Protocol: Real-time bidirectional communication
• Automatic Reconnection: Handles connection failures gracefully
• TLS Support: Secure WebSocket (WSS) connections
• Hybrid Encryption: End-to-end encryption with Ed25519 and AES-GCM
• Event Acknowledgment: Manual or automatic message acknowledgment
• Event Replay: Request historical messages by ID
• Pause/Resume: Control message flow with subscription pause/continue

Connection Options

# Secure WebSocket (production)
engine = EnSyncEngine("wss://node.ensync.cloud")

# Insecure WebSocket (development)
engine = EnSyncEngine("ws://localhost:8080")

# With options
engine = EnSyncEngine("wss://node.ensync.cloud", {
    "enableLogging": True,
    "reconnect_interval": 5000,
    "max_reconnect_attempts": 10
})

When to Use WebSocket vs gRPC

Use WebSocket when:

• You need browser compatibility
• Your infrastructure has better WebSocket support
• You're working in restricted environments where gRPC is blocked
• You prefer text-based protocols for debugging

Use gRPC when:

• You need maximum performance
• You're building server-to-server communication
• You want built-in load balancing and service mesh integration
• Binary protocol efficiency is important

For most production use cases, we recommend the ensync-grpc package for better performance.

Documentation

For complete documentation, examples, and API reference, visit:

• Full Documentation
• EnSync Engine

Related Packages

• ensync-core: Core utilities (automatically installed as dependency)
• ensync-grpc: High-performance gRPC client (recommended for production)

License

MIT License - see LICENSE file for details