Offline Signing

[lucas-u410]

Hello!

We are trying to support runes in a bitcoin wallet with offline signing. No hot keys, as this is too risky. We need to be able to both store (easy) and transfer (hard). Is anyone aware of a way to support offline signing for rune?

Ord requires the keys to be hot on a bitcoin core node, and I am not aware of a way around that.

There are some rune web apps which can connect to Leather, and Leather supports signing on a ledger. However ledger does not support sending runes. So that does not solve our problem.

Can anyone point us in the right direction? We are willing to put in some substantial work towards this. Perhaps there's a way to load bitcoin core with only an xpub, and modify ord to create pbsts instead of signing immediately? Perhaps we can reverse engineer the rune web apps? If all else fails, fork ord and add pbst support?

If you had to do this, where would you start?

Thank you!