firebase-android-sdk

If you are interested, you can read the specifications: https://unifiedpush.org/developers/spec/android/. The same question actually exists for firebase-messaging (Google) too (answer here: https://github.com/firebase/firebase-android-sdk/blob/cf5fe2...)

GitHub seems somewhat intentionally not built for discovery. Which is fine, but I'll give some examples anyway: Here's the organization I manage: https://github.com/firebase There is so little customization allowed on that page. It's very hard for me to tell a curious developer what's new or exciting unless I want to constantly adjust pinned repos. Now visit this page on a laptop monitor: https://github.com/firebase/firebase-android-sdk Notice that you're immediately presented with the folder structure and the README is "below the fold". So the developer's own words about the project are hidden unless you scroll for them. A lot of newbies get really thrown by this, they start clicking blindly into the code without knowing there are instructions below. All that said: I love GitHub. I spent 50%+ of my day on GitHub and manage 100+ rep

From what I can tell, you need firebase-messaging, which doesn't seem to be on that list. Am I reading it wrong? Edit: seems I was reading correctly: https://github.com/firebase/firebase-android-sdk/issues/125#...

The backend is almost entirely custom, though many common low-level open-source components are used pervasively. For example, for components written in C++ we use Abseil, Google Test, etc. The SDKs are all open source and make use of other open source components: * Android: https://github.com/firebase/firebase-android-sdk/tree/master/firebase-firestore * iOS: https://github.com/firebase/firebase-ios-sdk/tree/master/Firestore * Web: https://github.com/firebase/firebase-js-sdk/tree/master/packages/firestore For example, the iOS SDK uses LevelDB for local key-value storage and gRPC for communication with the backend.