# Nyx Documentation (/Nyx/)



Introduction to Nyx [#introduction-to-nyx]

Nyx is a modern, privacy-first decentralized chat application designed to offer a seamless, real-time communication experience. Built on a cutting-edge stack utilizing **Bun**, **Hono**, **React**, and **WebSockets**, Nyx drops traditional email/password authentication in favor of blockchain-based cryptographic wallet authentication.

Core Pillars [#core-pillars]

1. **Absolute Privacy**: All direct and group conversations are end-to-end encrypted. The server routes encrypted payloads and has zero knowledge of the message contents.
2. **Wallet Authentication**: Identity is proven through ed25519 cryptographic signatures using a Solana/crypto wallet. There are no passwords to leak.
3. **Real-Time Presence**: An optimized Redis-backed presence engine ensures you always know when your peers are online, typing, or have read your messages.
4. **Local-First Experience**: The frontend utilizes aggressive caching and optimistic UI updates to provide a 0-latency feel, backed by a robust state machine in Zustand.

Technology Stack [#technology-stack]

* **Client**: React, Vite, Zustand, TailwindCSS, Framer Motion, Radix UI.
* **Server**: Bun, Hono, Drizzle ORM (PostgreSQL), Redis (Pub/Sub & Presence), WebSockets.
* **Cryptography**: `tweetnacl` for ed25519 signature verification and `libsignal` inspired Double Ratchet / Sender Key derivations for E2EE.

Use the sidebar to explore the deep dives into the system architecture, real-time engine, and encryption implementations.