Is there a Roll20 Discord bot? (Something similar to Avrae?)

I play games on Roll20, and run a Discord server. I've got some folks asking me to install a dice rolling bot. Someone recommended the D&D Beyond bot to me (Avrae) a while ago. But I'd rather have something that could tie into Roll20 games if possible. I've used the search system to look for "Discord bot", but I'm just seeing results that are not strictly related to Roll20. Does anyone know if there is an official Roll20 bot for Discord? Is such a thing actually possible? Or does Avrae only work because D&D Beyond only has one set of rules to deal with? Would I actually need a bot that ties into the specific character sheet, that I use in a game? Would I need to have a different bot for every RPG system?

Avrae imports a DnDBeyond character, and rolls from that. You would need to build something that imports from Roll20. Possible, but not simple. Avrea was also created because DnDB had no "playing" area, and at the time had no internal dice rolling. Roll20 has both of these. If you are using Roll20, what is gained by moving the dice rolls to an external roller?