README.md

PayNext Documentation Index

PayNext is a robust, cloud-native payment processing platform built with microservices architecture, offering secure transaction processing, AI-powered fraud detection, and comprehensive financial analytics. The platform supports multiple payment methods, currencies, and provides rich APIs for developers.

Quick Start

Get started with PayNext in 3 simple steps:

1. Clone & Setup: git clone https://github.com/quantsingularity/PayNext.git && cd PayNext
2. Start Services: docker-compose up -d (for Docker) or ./scripts/paynext.sh build && ./scripts/paynext.sh start (for local)
3. Access Dashboard: Open http://localhost:3000 in your browser

Table of Contents

Getting Started

• Installation Guide - System requirements, installation options, and environment setup
• Quick Usage Guide - Common usage patterns for CLI and API
• Configuration - Complete configuration reference

Development

• API Reference - REST API documentation with examples
• CLI Reference - Command-line tool documentation
• Architecture Overview - System design and component interaction
• Feature Matrix - Complete feature listing with versions

Examples

• Example 1: User Registration & Authentication
• Example 2: Processing Payments
• Example 3: Fraud Detection Integration
• Example 4: ML Services Integration
• Example 5: Kubernetes Deployment

Operations

• Troubleshooting Guide - Common issues and solutions
• Contributing Guide - How to contribute to the project
• Security Best Practices - Security guidelines

Project Structure

PayNext/
├── backend/              # Spring Boot microservices
│   ├── eureka-server/   # Service discovery
│   ├── api-gateway/     # API gateway with routing
│   ├── user-service/    # User management
│   ├── payment-service/ # Payment processing
│   ├── notification-service/  # Notifications
│   └── fraud-detection-service/  # Fraud detection
├── ml_services/         # Python ML services
│   ├── fraud/          # Fraud detection models
│   ├── credit_scoring/ # Credit scoring
│   ├── churn/          # Churn prediction
│   ├── recommendation/ # Recommendation engine
│   └── categorization/ # Transaction categorization
├── web-frontend/       # React web dashboard
├── mobile-frontend/    # Next.js mobile app
├── infrastructure/     # Terraform & Kubernetes configs
└── scripts/           # Automation scripts

Key Features

Category	Features
Payments	Multi-currency, recurring billing, split payments, payment links
Security	PCI DSS compliance, AI fraud detection, tokenization, 2FA, end-to-end encryption
ML/AI	Fraud detection, credit scoring, churn prediction, transaction categorization
Analytics	Real-time dashboards, custom reports, data export (CSV/PDF/Excel)
DevOps	Docker/Kubernetes deployment, CI/CD pipelines, monitoring with Prometheus/Grafana

Technology Stack

• Backend: Java 17, Spring Boot 3.2.0, Spring Cloud 2023.0.0
• Databases: MySQL, MongoDB, Redis
• Messaging: RabbitMQ, Kafka
• Frontend: React 18, TypeScript, Material-UI, Next.js 15
• ML Services: Python, FastAPI, scikit-learn, TensorFlow
• Infrastructure: Docker, Kubernetes, Terraform, Helm

Support & Resources

• GitHub Repository: https://github.com/quantsingularity/PayNext
• Issues: Report bugs and request features via GitHub Issues
• License: MIT License