@nanoolabs/rate-limiter

Minimalist, high performance in-memory rate limiting middleware for Bun and Hono.

High Level Architecture (Planning)

[Client] ---> [Cloudflare] ---> [Bun + Hono Runtime]
|
[Rate Limiter MW]
|
+--------------+-------------+
|                             |
[Allowed: count < limit]      [Blocked: count >= limit]
|                             |
await next()                  Return HTTP 429

Core Strategy

• Target Runtime: Bun
• Framework: Hono.js
• State Store: In-memory (Map object) / future proof for LibSQL (turso)
• Algorithm: Fixed window counter (v1) -> Token Bucket (v2)
• Identifier: CF-Connecting-IP headers