Firebase Cloud Messaging API HTTP v1 migration

Question

We are using FCM normally.
I am curious if there is anything special that needs to be done in the app(iOS & Android & Flutter) when migrating from existing HTTP to HTTP v1.

I looked up the official Firebase documentation, and it said to update payloads, endpoints, etc. only on the server side.

Answer 1

The migration described here only affects the API calls to send messages. It does not affect any client-side APIs or components that are used to receive messages.

Also see the last section of my (longer) answer here: The legacy Firebase Cloud Messaging (FCM) API is deprecated. what does it mean