Stock Exchange Simulator

A robust, high-performance REST API for simulating stock trading operations, built with Rust, Axum, PostgreSQL, and Redis. This core service provides authentication, balance management, trading operations, and real-time price updates via WebSocket connections.

• 💰 Balance Management - Secure deposit and withdrawal operations with precise decimal handling
• 📈 Stock Trading - Buy and sell operations with real-time price validation
• 📊 Portfolio Management - Track holdings with automatic average price calculations
• 📋 Transaction History - Complete audit trail of all trading activities

• 🔄 WebSocket Support - Real-time price updates for subscribed tickers
• 📡 gRPC Integration - Connects to external price feed service for live market data
• ⚡ Redis Caching - High-performance price caching and session management

• 🔐 JWT Authentication - Secure token-based authentication with configurable expiration
• 🛡️ Password Security - Argon2 password hashing with salt
• ✅ Input Validation - Comprehensive request validation and sanitization
• 🚫 SQL Injection Protection - Compile-time verified queries with SQLx
• 📝 Audit Logging - Security event logging for monitoring
• 🔒 Error Handling - Sanitized error responses preventing information disclosure

• 🏗️ Clean Architecture - Modular design with clear separation of concerns
• 🔗 Connection Pooling - Efficient database and Redis connection management
• 📏 Request Limits - Configurable request size limits for DDoS protection
• 🎯 Type Safety - Rust's strong type system prevents runtime errors