CEX

A minimal centralized exchange backend in Rust.

Architecture

┌─────────┐     ┌───────────┐     ┌────────┐
│   API   │────▶│   Redis   │◀────│ Engine │
└─────────┘     └───────────┘     └────────┘
                     │
        ┌────────────┼────────────┐
        ▼            ▼            ▼
   ┌─────────┐  ┌─────────┐  ┌──────────┐
   │   WS    │  │DB Filler│  │ Postgres │
   └─────────┘  └─────────┘  └──────────┘

Service	Description
api	HTTP gateway (orders, markets, health)
engine	In-memory orderbook matching engine
ws	WebSocket real-time event streaming
db_filler	Persists events to Postgres

Quick Start

# Start infrastructure
docker compose up -d redis postgres

# Run services (in separate terminals)
cargo run -p api
cargo run -p engine
cargo run -p ws
cargo run -p db_filler

Or with Docker:

docker compose up -d

API

Endpoint	Method	Description
/order/new	POST	Create order
/order/cancel	POST	Cancel order
/markets	GET	List markets
/health	GET	Health check

Tests

cargo test --all

Requirements

• Rust 1.77+
• Redis
• PostgreSQL