🔗 Chain Middleware

A robust Node.js/Express API acting as the secure bridge between Client Applications (Web/Mobile) and the Service Blockchain Network. This middleware abstracts the complexity of Hyperledger Fabric's gRPC protocols, exposing simple REST endpoints for asset management.

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📖 Table of Contents

• Architecture
• Prerequisites
• Folder Structure
• Installation & Setup
• Configuration
• API Documentation
• How it Works (Fabric Gateway)

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🏛 Architecture

This middleware implements the Fabric Gateway Pattern:

1. Client: Sends JSON HTTP requests (e.g., POST /create).
2. Middleware:
   • Validates the request.
   • Loads the Wallet Identity (X.509 Certificate).
   • Connects to the Fabric Gateway via gRPC.
3. Blockchain: Submits the transaction to the Peer nodes for endorsement and committing.

[Mobile App] <--> [HTTP/JSON] <--> [Middleware (This Repo)] <--> [gRPC] <--> [Fabric Network]