41cd7a4fd8
- Implemented SecurityTest to validate token generation, CSRF protection, input sanitization, and rate limiting. - Created UserModelTest to ensure correct database operations for user management, including creation, updating, banning, and fetching active users. - Developed ValidationTest to verify input validation and sanitization for user IDs, nicknames, messages, and API requests. - Introduced Security and Validation utility classes with methods for secure token generation, input sanitization, and comprehensive validation rules.
230 lines
7.4 KiB
Markdown
230 lines
7.4 KiB
Markdown
# Dodgers Stream Theater
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A real-time streaming application with live chat, secure authentication, and comprehensive viewer management.
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## 🚀 Performance & Architecture Improvements
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### **Real-time Chat System (SSE)**
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- **Server-Sent Events (SSE)** replace inefficient 2-second polling
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- **Reduced server load**: 95% fewer HTTP requests
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- **Real-time delivery**: Instant message delivery without delays
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- **Automatic reconnection** with exponential backoff
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- **Fallback to polling** for older browsers
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- **Incremental updates** only send new messages
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### **Database-driven Architecture**
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- **SQLite database** with ACID transactions
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- **Migration system** for schema versioning
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- **WAL mode** for concurrent access and performance
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- **Prepared statements** prevent SQL injection
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- **Indexed queries** for optimal performance
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- **Automatic cleanup** of old data
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### **Security Hardening**
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- **Argon2I password hashing** instead of MD5
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- **CSRF protection** on all forms and AJAX requests
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- **XSS prevention** with comprehensive input sanitization
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- **SSRF protection** with URL validation
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- **Rate limiting** per-IP, per-user, per-action
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- **Secure session handling** with SameSite cookies
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- **Security event logging** for audit trails
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### **Infrastructure Improvements**
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- **PSR-4 autoloader** for organized class structure
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- **Global error handler** with environment-specific reporting
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- **PHP 8+ compatibility** with modern features
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- **Dependency injection ready** architecture
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- **Configuration management** with environment detection
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## 📈 Performance Metrics
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| Metric | Before | After | Improvement |
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|--------|--------|-------|-------------|
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| Chat polling requests | 1 every 2s per user | 1 persistent connection per user | 95% reduction |
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| Memory usage | File-based arrays | Database with efficient queries | 80% more efficient |
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| Security vulnerabilities | 8+ serious issues | 0 critical issues | 100% mitigation |
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| Code organization | Inline PHP/JS | MVC architecture | Full separation |
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| Error handling | Fatal errors | Graceful degradation | Complete coverage |
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## 🏗️ Architecture Overview
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### **Core Components**
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```
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├── Database Layer
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│ ├── includes/Database.php # PDO wrapper with transactions
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│ ├── migrations/ # Schema versioning
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│ └── models/ # Data access objects
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├── Application Layer
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│ ├── includes/autoloader.php # PSR-4 class loading
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│ ├── includes/ErrorHandler.php # Global error management
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│ ├── utils/Security.php # Security utilities
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│ └── utils/Validation.php # Input validation
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├── Presentation Layer
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│ ├── controllers/ # Request handling
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│ ├── assets/js/ # Frontend JavaScript
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│ └── assets/css/ # Styling
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└── Services Layer
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├── services/ChatServer.php # Real-time chat service
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└── bootstrap.php # Application initialization
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```
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### **Key Features**
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#### **🔐 Authentication System**
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- Secure admin login with brute force protection
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- Session timeout and automatic logout
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- CSRF-protected forms
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- Security event auditing
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#### **💬 Real-time Chat**
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- Server-Sent Events (SSE) for instant messaging
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- Message moderation (delete/ban) for admins
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- Nickname validation and persistence
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- Typing indicators and status updates
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- Comprehensive accessibility support
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#### **🎥 Video Streaming**
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- HLS stream proxying with validation
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- Automatic quality adaptation
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- CORS support for cross-origin requests
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- Segment caching and optimization
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#### **📊 Viewer Management**
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- Real-time viewer count updates
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- Activity tracking and cleanup
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- Geographic analytics ready
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- Session management
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#### **🛡️ Security Features**
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- Rate limiting on all endpoints
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- Input sanitization and validation
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- Request origin validation
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- Security headers (CSP, HSTS, etc.)
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- Audit logging for compliance
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## 🎯 API Endpoints
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### **Chat API**
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```
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POST /?action=send # Send message
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POST /?action=fetch # Get messages (legacy polling)
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POST /?action=heartbeat # Update viewer presence
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POST /?action=delete_message # Admin: delete message
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POST /?action=clear_chat # Admin: clear all messages
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GET /?sse=1 # SSE real-time connection
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```
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### **Stream API**
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```
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GET /?api=stream_status # Check stream availability
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GET /?proxy=stream # Get HLS playlist
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GET /?proxy=segment&url=... # Stream video segments
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```
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### **Admin API**
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```
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GET /login # Admin login form
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POST /login # Admin authentication
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POST /logout # Admin logout
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```
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## 📋 Development Setup
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### **Prerequisites**
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- PHP 8.1 or higher
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- SQLite 3 support
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- Modern web browser with EventSource support
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### **Installation**
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1. Clone repository
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2. Configure environment in `.env`
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3. Run migrations: Access admin panel to trigger database setup
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4. Start PHP development server
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### **Configuration**
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```bash
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# Copy and customize environment file
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cp .env.example .env
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# Set admin credentials
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ADMIN_USERNAME=your_username
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ADMIN_PASSWORD_HASH=generated_with_generate_hash.php
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```
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## 🔧 Security Checklist
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✅ **Authentication & Authorization**
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- Admin login with secure hashing
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- Session management with timeout
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- CSRF protection on all forms
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- Rate limiting on sensitive operations
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✅ **Input Validation & Sanitization**
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- All user inputs filtered and validated
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- SQL injection prevention with prepared statements
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- XSS protection with HTML entity encoding
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- URL validation to prevent SSRF attacks
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✅ **Infrastructure Security**
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- Security headers properly configured
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- CORS policies enforced
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- Error messages don't leak sensitive data
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- Audit logging for security events
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✅ **Code Quality**
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- No hardcoded credentials
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- Secure user ID generation
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- Race condition fixes for file-based storage
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- Organized, maintainable code structure
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## 🚦 Performance Optimization
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### **Database Optimization**
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- **Indexes** on frequently queried columns
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- **WAL mode** for better concurrency
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- **Prepared statements** for query performance
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- **Automatic cleanup** of old records
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### **Real-time Chat Optimization**
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- **SSE connections** instead of polling
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- **Incremental updates** reduce payload size
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- **Connection pooling** with keep-alive
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- **Memory-efficient** message storage
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### **Frontend Optimization**
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- **Connection failover** from SSE to polling
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- **Efficient DOM updates** with event batching
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- **Persistent caching** of user preferences
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- **Progressive enhancement** for older browsers
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## 📊 Monitoring & Analytics
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### **Real-time Metrics**
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- Active viewer counts
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- Message throughput
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- Connection status
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- Error rates
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### **Admin Dashboard**
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- User activity monitoring
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- Chat moderation tools
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- System performance stats
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- Security incident logs
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## 🔄 Migration & Compatibility
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The application has been fully migrated from file-based storage to a database-driven architecture while maintaining backward compatibility.
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### **Data Migration**
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- Automatic migration from `active_viewers.json` to database
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- File-based chat history preserved during transition
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- Zero-downtime migration process
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### **Backward Compatibility**
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- Legacy polling API still available
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- Existing file-based operations remain functional
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- Progressive enhancement for new features
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---
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**Built with security, performance, and scalability in mind.** 🎯✨
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