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Slot Game Backend Architecture

This document provides a comprehensive overview of the slot game backend architecture, showing the integration with RGS (Remote Game Server) and the AWS ECS Fargate deployment infrastructure.

Executive Architecture Overview (v2)​

Key Business Benefits​

💡 Scalability & Performance​

  • Auto-scaling infrastructure adapts to player demand automatically
  • High availability ensures 99.9% uptime with zero downtime deployments
  • Global reach with multi-region deployment capability

🛡️ Enterprise Security​

  • Bank-grade encryption for all player data and transactions
  • Regulatory compliance built-in for gaming jurisdictions
  • Real-time fraud detection and player protection

🎯 Business Agility​

  • Rapid game deployment - new games live in days, not months
  • Multi-operator support - one platform, multiple brands
  • Flexible mathematics - adjust RTP and game parameters instantly

💰 Cost Optimization​

  • Pay-per-use AWS infrastructure reduces operational costs by 40%
  • Serverless architecture eliminates server management overhead
  • Automated scaling prevents over-provisioning

Key Components​

1. Client Layer​

  • Multi-Platform Support: Web browsers, mobile applications, and desktop clients
  • Encrypted Communication: All client-server communication is encrypted using AES encryption
  • RESTful API: Standard HTTP/HTTPS API endpoints for game interactions

2. AWS ECS Fargate Infrastructure​

  • Containerized Deployment: NestJS application deployed as Docker containers
  • Auto Scaling: Multiple tasks running simultaneously for high availability
  • Serverless Compute: No server management required with Fargate
  • Network Isolation: Tasks run in private subnets with controlled internet access

3. Security Architecture​

  • Global Decryption Middleware: All incoming requests are automatically decrypted
  • JWT Authentication: Token-based authentication for secure sessions
  • Session Management: Persistent session handling with automatic cleanup
  • WAF Protection: Web Application Firewall for additional security

4. Game Engine Architecture​

  • Strategy Pattern: Dynamic game selection based on game ID
  • Modular Design: Each game type has its own dedicated engine
  • Shared Logic: Common utilities for RNG, mathematics, and monitoring
  • Math Model Driven: JSON-based mathematical models for different RTP variants

5. RGS Integration​

  • External Service: Remote Game Server handles player management and wallet operations
  • RESTful API: HTTP-based communication with the RGS
  • Transaction Management: Debit/credit operations for game rounds
  • State Persistence: Game states stored externally for regulatory compliance

6. Monitoring and Observability​

  • CloudWatch Integration: Comprehensive logging and metrics
  • X-Ray Tracing: Distributed request tracing across services
  • Custom Monitoring: Application-level monitoring with structured logging
  • Health Checks: Automatic health monitoring and alerting

Deployment Architecture​

ECS Fargate Task Configuration​

- Task Definition:
  - vCPU: 0.5 - 2.0 (configurable based on load)
  - Memory: 1GB - 4GB (auto-scaling based on utilization)
  - Network Mode: awsvpc (dedicated ENI per task)
  - Platform Version: LATEST

- Service Configuration:
  - Desired Count: 2-10 (auto-scaling)
  - Deployment Type: Rolling update
  - Health Check Grace Period: 60 seconds
  - Load Balancer: Application Load Balancer

Network Architecture​

  • VPC: Isolated network environment
  • Public Subnets: Load balancer and NAT gateway placement
  • Private Subnets: ECS tasks with no direct internet access
  • Security Groups: Restricted inbound/outbound traffic rules
  • NAT Gateway: Controlled outbound internet access for RGS communication

Security Features​

  • Secrets Management: API keys and credentials stored in AWS Secrets Manager
  • IAM Roles: Least privilege access for ECS tasks
  • Encryption: Data in transit and at rest encryption
  • Compliance: Built-in logging and auditing for regulatory requirements

Game Flow Architecture​

Standard Game Round Flow​

This architecture provides a scalable, secure, and maintainable solution for slot game backends that can be easily adapted for different clients and games while maintaining regulatory compliance and high performance.