pubnub-functions

Serverless functions at the edge are executed using PubNub Functions to handle real-time event processing, allowing you to transform messages and invoke webhooks without managing infrastructure. You deploy them by creating a Function in the PubNub Admin Portal and attaching triggers like Before Publish or After Publish.

Yes, PubNub Functions enforce async/await best practices and support built-in modules like xhr for external HTTP requests and crypto for encryption. This enables production-grade workflows by allowing asynchronous data fetching and secure message transformation within your edge code.

The best way to store secrets for edge-deployed webhooks is using the built-in vault module. PubNub Functions utilize vault-based secrets to securely manage sensitive configuration data, ensuring your production-grade workflows keep credentials safe without hardcoding them into your JavaScript logic.

Yes, PubNub Functions support scheduled tasks through the On Interval trigger and lightweight REST endpoints via the On Request scenario. This allows you to execute periodic serverless logic on schedules and handle incoming web requests directly on the edge network.

You persist data and state across serverless function invocations using the built-in kvstore module. This key-value storage enables real-time message enrichment and stateful automation by allowing your edge functions to retrieve and save data between different event triggers.

Limitations when deploying serverless functions at the edge include keeping operation counts within allowed limits and strictly following channel pattern rules. Proper try/catch error handling is enforced to ensure your event-driven workflows remain stable and do not exceed platform constraints.