Description
Is your feature request related to a problem? Please describe.
It frustrates our team that each time our mobile app is updated and our users open the app, a new device_id is generated. We are saving this new device_id to the user, because we can't know for sure that the user haven't just bought a new phone and installed the app into that new phone as well. This leads to the problem that when we subscribe users to a topic, with all their device ids, we get many Errors ['NOT_FOUND', 'NOT_FOUND', 'NOT_FOUND', 'NOT_FOUND', 'NOT_FOUND', 'NOT_FOUND'] returned.
Describe the solution you'd like
We'd like that the API returns a list of failed device_ids so that we can delete those from our database. We'd love to see this extended to messaging.unsubscribe_from_topic as well.
Describe alternatives you've considered
Digging through the firebase code doesn't give any hints that the information we're looking for is discarded in transit.
Additional context
Code example:
from firebase_admin import messaging
def do_subscribe(tokens, topic):
response = messaging.subscribe_to_topic(tokens, topic)
if response.failure_count > 0:
logger.error(
f"Errors {list(map(lambda e: e.reason, response.errors))}",
exc_info=False,
)