Financial Instrument Price Service

This project provides a real-time financial instrument price tracking service with REST API and WebSocket capabilities. It retrieves price data from Binance and broadcasts updates to connected clients using SignalR.

Features

• REST API: Fetch the list of available instruments and get the latest price for a specific instrument.
• WebSocket: Real-time price updates via WebSocket subscription to multiple instruments.
• Data Source: Live data from Binance's WebSocket API.
• Scalable: Designed to efficiently handle 1,000+ concurrent WebSocket subscribers.

Technology Stack

• Backend: .NET Core, SignalR, WebSocket for real-time data
• Frontend: SignalR client for receiving updates
• External API: Binance WebSocket API for instrument prices

Setup Instructions

1. Clone the repository:

   git clone https://github.com/yourusername/financial-instrument-price-service.git
   cd financial-instrument-price-service

2. Open the solution in Visual Studio or VS Code.

3. Configure Instruments (Optional):

   • Update the list of instruments in BinanceService if additional instruments are needed:

     private readonly List<string> instruments = new List<string> { "btcusdt", "ethusdt", "bnbusdt" };

4. Run the Application:

   • Start the project (both client and server applications).
   • The server connects to Binance’s WebSocket API and broadcasts price updates to all clients subscribed to specific instruments.

5. API Endpoints:

   • GET /api/instruments: List available financial instruments.
   • GET /api/instruments/{symbol}/price: Get the current price of a specific instrument.

Usage

• REST API: Use the provided endpoints to access current prices.
• WebSocket: Subscribe to live price updates through SignalR to receive price updates in real-time.

Example

After running the application, you can:

1. Access the list of available instruments:

   curl http://localhost:7075/api/instruments

2. Get the latest price for an instrument (e.g., BTCUSDT):

   curl http://localhost:7075/api/instruments/btcusdt/price