Firebase Auth for Cloudflare Workers

Cloudfire Auth is a JavaScript/TypeScript library designed to integrate Firebase Authentication functionalities directly within Cloudflare Workers environments. Currently at version 0.4.0, it provides core features such as Firebase ID token verification, user retrieval, and user deletion. The library leverages native Cloudflare APIs, specifically Cloudflare KV, for efficient OAuth2 token caching, which is crucial for performance and cost-effectiveness in a serverless context. It is built with a strong emphasis on modern JavaScript, being ESM-only, and offers full TypeScript support, making it suitable for contemporary development workflows. Key differentiators include its tight integration with Cloudflare's ecosystem, minimal external dependencies (only 'jose' for JWT handling), and its focus on solving the specific challenge of running Firebase Auth in a Worker environment where the official Firebase Admin SDK is not directly compatible due to Node.js-specific dependencies.