Total bits donated and/or bit (cheer) Leaderboard Nightbot command?

Is there an existing Nightbot command a viewer can use in order to see how many bits/cheers they have donated in total to a channel?

Also, separate question, is there a Nightbot command that would let a viewer see a short leader board of the top bit donators to a channel?

I don’t believe twitch has a way to get the total bits given by a user, so nightbot wouldn’t have a way to have this information reliably. If there is one then it could possibly be done through a customapi, but again, i don’t know of a way to get this info.

Same reason as above.