We don’t have anything for custodial signers yet but definitely thinking about it in the near future, this seems like a really cool design, though! Yeah, peering is still something that needs to be automated in bifrost otherwise it requires somewhat manual configuration still at this point. I do have a somewhat streamlined and simplified library that wraps bifrost (just a way of encapsulating the basic “igloo“ logic so all the different signers can share the same APIs) maybe this could help some? Going back to read your previous messages now though
https://github.com/frostr-org/igloo-core