Introduction

OnixS low-latency .NET FIX Engine is a .NET class library that FIX-enables applications written in .NET supported languages (C#, Visual Basic (VB.NET), F#, Managed C++, etc.).

The FIX Engine provides the following services:

• Manages a network connection.
• Manages the FIX session layer (for the delivery of application messages), automatically handles Sequence Reset, Resend Request, Test Request, Logon and Logout session-level messages.
• Manages the FIX application layer (defines business-related data content).
• Creates (outgoing) FIX messages.
• Parses (incoming) FIX messages.
• Validates FIX messages.
• Persists messages and FIX session state.
• Recovers the FIX session state after a restart.
• Controls the FIX Session lifetime following the given schedule.
• Detects the telecommunication link failures and reconnects the FIX session automatically.
• Provides TLS/SSL-based encryption.
• FAST compression and decompression.

The following image is a high-level overview of the .NET FIX Engine architecture: