🏷 1. Project Name

Multi-Party Payment Orchestrator (MPPO)

A scalable system enabling group ordering with split payments.

🎯 2. Overview

This backend supports a feature where one user can create a group order, invite friends, split the payment, and the order is confirmed only when all required payments succeed.

The system has 3 core microservices:

1. Group Service – manages group orders, members, split logic
2. Payment Service – handles payment intents, webhooks, verification
3. Order Service – final order placement after full payment

Each service runs independently and communicates via events and APIs.

🧩 3. High-Level Architecture

• Client → API Gateway → Group Service
• Group Service → Payment Service → Payment Gateway
• Payment Service → Event Bus → Group Service
• Group Service → Order Service → Merchant Backend
• Notification Service (async)