Typed PubSubType-safe messaging for Firebase

A type-safe PubSub abstraction for Google Cloud and Firebase with Zod schema validation, duplicate prevention, and stale message handling.

Type-Safe Messaging

Full TypeScript support for publishers and handlers. Topic names, payloads, and handler arguments are all validated at compile time.

Runtime schema validation using Zod prevents invalid messages from being processed. Validation errors are logged with flattened details.

Optional event marking with your own storage (like Redis) to track processed events and ensure exactly-once handling.

Automatically drop messages that exceed a configurable age, preventing the processing of outdated data during retry storms.

Configure library-wide defaults with per-handler overrides. Sensible out-of-the-box settings for retries, memory, and scaling.

Wraps firebase-functions/v2 onMessagePublished with type safety and validation, while forwarding all native configuration options.