CactusHoodie24/Payment_Gateway

Enterprise fintech backend for secure payments, transactions & merchant management in Malawi # Payment Gateway A comprehensive, enterprise-grade fintech backend platform for managing financial transactions, organizations, merchants, and digital payments in Malawi. Built with Node.js, Express, and MySQL, this API gateway powers the complete financial operations ecosystem. ## 📋 Table of Contents - Overview - Architecture - Core Features - Technology Stack - Project Structure - Getting Started - API Documentation - Authentication & Authorization - Audit Logging System - Database Schema - Deployment - Contributing ## 📖 Overview The payment gateway is a production-ready backend platform designed to: - Facilitate secure digital payments through multiple payment channels (Airtel Money, TNM) - Manage merchant onboarding and account management - Process financial transactions with comprehensive audit trails - Provide organization-based multi-tenancy support - Enable webhook-based integration with external systems - Track financial activities with immutable audit logs - Manage API keys, permissions, and access control - Generate financial dashboards and analytics **Use Cases:** - Payment service providers needing transaction processing infrastructure - Organizations requiring account management and fund transfers - Merchants needing payment processing capabilities - Financial institutions managing multi-tenant operations ## 🏗️ Architecture ### Layered Architecture The application follows a clean, layered architecture pattern: ``` ┌─────────────────────────────────────────────────────────────┐ │ API Routes Layer │ │ (Express Routes - HTTP endpoint definitions) │ └──────────────────────┬──────────────────────────────────────┘ │ ┌──────────────────────▼──────────────────────────────────────┐ │ Middleware Layer │ │ (Auth, Audit Logging, Rate Limiting, Validation) │ └──────────────────────┬──────────────────────────────────────┘ │ ┌──────────────────── …