Figuring out which FCM tokens are expired from a firebase response with several registration ids -
firebase rest endpoint push notifications lets send message several people @ once passing tokens through "registration_ids" array instead of "to". when response comes looks this:
{ "multicast_id":000000000000000000, "success":1, "failure":4, "canonical_ids":0, "results":[ { "error":"notregistered" }, { "error":"notregistered" }, { "error":"notregistered" }, { "error":"notregistered" }, { "message_id":"0:0000000000000000%a0a0a0aaa0a0a0aa" } ] }
how supposed correlate notregistered errors particular token sent to?
the results in same order specified them in request. last token valid.
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