firebase realtime database how to write rules to only apply the web app to write data

I'm writing a very simple webapp.

I only want the webapp to be able to write into the firebase's realtime database.

I am not able to find any instructions about only allowing webapp to write data.

https://stackoverflow.com/questions/66718127/firebase-realtime-database-how-to-write-rules-to-only-apply-the-web-app-to-write March 20, 2021 at 12:03PM