SS220 Queue Engine

4-piece system that allows to enqueue and limit players on all of our game servers uninvasive way:

• Iptables Daemon
• Game Lobby Server
• Queue Backend
• Queue Frontend

Iptables Daemon

Built with Rust and use iptables wrapper. It connects to queue backend via websockets;

Game Lobby Server

Essentially just IE-based DM browser to authenticate players and open frontend;

Queue Backend

Built with Nest.JS. Technologies used:

• Prisma ORM
• Webhook server
• Redis as temporary DB for queue and servers stats
• JWT for auth
• EventEmitter for internal events
• SSE for pushing stats
• RxJS for observables,

Queue Frontend

Built with Next.JS.