FIX protocol Node.js client

A Node.js FIX client that enables communication with FIX servers for trading and market data operations. It acts as an initiator in the FIX protocol, establishing connections, sending messages, and receiving responses according to the FIX 4.4 specification standards.

On the frontend, a React application is designed for manual testing of various FIX protocol endpoints, which can be helpful during the onboarding process.

Key Components

1. Session Management

   • Handles TCP/IP connections to FIX servers
   • Manages login/logout sequences
   • Maintains heartbeat intervals
   • Processes session-level messages

2. Message Processing

   • Constructs FIX messages following 4.4 specification
   • Parses incoming FIX messages
   • Validates message format and content

3. Protocol Compliance

   • Implements required fields and tags
   • Maintains proper message structure
   • Handles checksum validation
   • Supports mandatory message types

Message Types

• Logon (35=A)
• Heartbeat (35=0)
• Logout (35=5)
• Execution Report (35=8)
• New Order Single (35=D)
• Order Cancel Request (35=F)
• Market Data Request (35=V)
• Collateral Inquiry (35=BB)
• Request For Positions (35=AN)

Usage

Server (Express)

1. Open the /server folder from terminal.

2. Run npm install to install all the dependencies.

3. Obtain the connection settings (host/port) and authentication credentials from the remote FIX provider.

   • Create an empty .env file and copy the contents of .env.example.
   • Update the FIX trading connection and FIX market data connection keys.

   Note: To connect to the Binance FIX Api, first generate an Ed25519 public key pair as described on testnet.binance.vision, then update the BINANCE_PRIVATE_KEY in .env.

4. Run npm run dev to start the server.

Client (React, Vite)

1. Open the /client folder from terminal.
2. Run npm install to install all the dependencies.
3. Create an empty .env file and copy the contents of .env.example.
4. Run npm run dev to start the application .
5. Visit the application at http://localhost:5173/.