API and WebSocket examples demonstrate how to fetch prices and subscribe to markets, illustrating practical usage for developers.

The project stacks Bun for the backend with native WebSocket, Hono, Redis, and Bull, while the frontend uses React 19, Vite, TailwindCSS 4, and TanStack Query, all organized in a monorepo with separate packages for backend and frontend.

Backend architecture centers on a WebSocket server that manages client subscriptions, supports multiple exchange adapters, and normalizes APIs via an adapter pattern.

The monorepo with Bun enables faster installs and streamlined development, with shared dependencies and unified scripts.

Locally, you can run the project by cloning the repo, installing with Bun, starting Redis, and running backend and frontend with bun dev to access the app at localhost:5173.

Benchmarks report Bun WebSocket handshakes around 3ms, message latency near 1ms, and substantially lower per-connection memory usage (~20KB) versus Node.js with ws.

Graceful degradation is built in through caching, multi-tier fallbacks, and alternate endpoints to handle exchange outages and rate limits.

Bandwidth optimization for WebSocket data relies on three layers—throttling, deduplication, and per-subscription data targeting—to minimize unnecessary transmissions while preserving critical updates.

Designed to solve multi-exchange price comparison pain points by delivering a single dashboard with real-time updates and side-by-side price comparisons across multiple exchanges.

The project invites external contributions under an open-source model, with contribution guidelines documented in CONTRIBUTING.md.

Production-level performance claims show the system handling 100,000+ concurrent connections and 500,000 messages per second, delivering notable improvements over Node.js equivalents.

Coinstate is an open-source real-time cryptocurrency price tracker aggregating prices from 10+ exchanges and streaming updates via Bun’s native WebSocket for sub-second latency.

The v2 roadmap envisions price alerts, historical charts, more exchanges, portfolio tracking, mobile apps, trading signals, and a public API.

Claims highlight a fivefold speed advantage over traditional Node.js solutions, a modern monorepo structure, and an Apache 2.0 license that encourages community involvement.

Key features include smart throttling (up to 10 updates per second per market), deduplication to save bandwidth, Redis caching for fast responses, and retry logic for resilience.