Use case: Specifically for setting or updating values in Firestore documents to proper Timestamp instances representing times other than the server's notion of 'now' (currently via the firebase.firestore.FieldValue.serverTimestamp() sentinel)

Ideally, react-native-firebase would expose the same Timestamp API as the Google Cloud Node.js SDK:

https://cloud.google.com/nodejs/docs/reference/firestore/0.19.x/Timestamp

It appears that Google's SDKs for both iOS and Android expose a Timestamp class, making it possible to have a cross-platform solution in react-native-firebase. See:

https://firebase.google.com/docs/reference/ios/firebasefirestore/api/reference/Classes/FIRTimestamp

and

https://firebase.google.com/docs/reference/android/com/google/firebase/Timestamp

Thank you for your consideration.