Firebase cloud messaging multicast id

Question

What is multicast_id in the Firebase cloud messaging service?

As indicated in the documentation provided by Google, a multicast identifier is a unique number that identifies a multicast message.

I read it, but I did not understand it clearly. Can anyone explain this?

Answer 1

Per Firebase Cloud Messaging HTTP Documentation :

multicast_id is a required parameter in the FCM response payload and is a unique identifier that identifies the multicast message.

A - , .

, - , .

, , Build App Send Requests, , Single Device Messaging, .

, .

Answer 2

a multicast_id ( ) message_id.

looptheloop88 answer, message_id, multicast_id /. :

API message_ids/multicast_ids , FCM.