Payment Logic

A comprehensive payment system architecture demonstrating recurring payment logic with Android client and server-side integration.

📋 Introduction

This repository showcases the complete payment flow architecture for implementing recurring subscriptions with proper client-server communication patterns.

Key Components

• Payment integration in Android: Mobile client implementation
• Server-side payment logic: Backend processing and validation
• Recurring payment handling: Subscription management and renewal

📊 Payment Scenario

Architecture Diagram

View the complete subscription scenario flow:

Direct Link: Subscription Scenario - Client-Server Side

🎯 Features

• Recurring Payment Logic: Automated subscription renewal handling
• Client-Server Architecture: Secure payment processing flow
• Android Integration: Mobile payment gateway implementation
• Subscription Management: Handle payment cycles and renewals
• Payment Validation: Server-side verification and validation
• Error Handling: Graceful failure management

🔄 Payment Flow

The architecture demonstrates:

1. Client Side (Android)

   • User initiates subscription
   • Payment gateway integration
   • Receipt handling
   • Payment confirmation

2. Server Side

   • Payment validation
   • Subscription creation/renewal
   • Receipt verification
   • Database updates
   • Webhook handling

3. Recurring Logic

   • Automatic renewal processing
   • Payment retry mechanisms
   • Subscription status management
   • Expiration handling

💡 Use Cases

• In-app subscription services
• Recurring membership payments
• Auto-renewable subscriptions
• Premium feature access
• SaaS payment processing

🛠️ Technology Stack

• Mobile: Android
• Payment Gateway: Google Play Billing / Apple In-App Purchase
• Backend: Server-side payment processing
• Architecture: Client-Server model

📖 Documentation

The diagram in this repository provides a visual representation of:

• Complete payment workflow
• Client-server communication
• Recurring payment cycles
• Subscription state management
• Error handling scenarios

🔐 Security Considerations

• Server-side payment validation
• Receipt verification
• Secure API communication
• Subscription status management
• Payment fraud prevention

👤 Author

Toufic SL

• GitHub: @touficSl
• LinkedIn: toufic-sleiman

📝 License

This project is open source and available under the MIT License.