A cause for celebration...

I've found a small project which hasn't been developed on yet.

An IDataProtection provider using Google's Firebase:

https://github.com/kibblewhite/IDataProtectionFirebase
https://www.nuget.org/packages/IDataProtectionFirebase/

I'm happy that I've managed to find a small project that hasn't already been done.

To use it is pretty straight forwards, get your project id and the json credentials file from GCP (Google Cloud Platform) for your Firebase Database and you are ready to rock.

In code usage "could" looks like this:

public void ConfigureServices(IServiceCollection services)
{
    service_container.AddDataProtection()
        .PersistKeysToFirebase(service_name);

    services.AddMvc();
}