Firebase Messaging to work with a non-default FIRApp

[vladogrigorov]

[READ] Guidelines

For large or ambiguous requests, such as significant breaking changes or use
cases that could be addressed by multiple different features, consider instead
starting a
Pitch
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flush out.

When filing a feature request please make sure the issue title starts with "FR:".

A good feature request ideally

• is either immediately obvious (i.e. "Add Sign in with Apple support"), or
• starts with a use case that is not achievable with the existing Firebase API and
  includes an API proposal that would make the use case possible. The proposed API
  change does not need to be very specific.

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Feature proposal

• Firebase Component: Messaging

Firebase supports creating multiple instances of its core component - FIRApp. Currently, Firebase Messaging on iOS works with the default FIRApp only. Thus there is no way to make an iOS app receive push notifications from a different source than its main Firebase project. At the same time, Firebase Messaging supports working with non-default FIRApp instances on Android.

When will Firebase Messaging support non-default FIRApp instances on iOS?

[charlotteliang]

Thank you for filing this. This effort has not been prioritized yet. Please upvote the head thread if you want this feature.