good one!
This is how you can create a #nostr private key using the hardware wallet ColdCard:
1) Insert microSD to CC
2) CC > Advanced > Derived Entropy (BIP-85) > Hex 32 bytes > index (0 - 9999) > press 1 to save to microSD
There are two ways that I found a to easily convert the hex private key to npub:
1. Install nostr:npub18m76awca3y37hkvuneavuw6pjj4525fw90necxmadrvjg0sdy6qsngq955 and login using the hex private key, then go to settings > keys if you would like to backup the npub.
2. Use the #damus Key Converter at damus.io/key/
I don’t recommend using this private key to store bitcoin because the private key is now considered hot because it has been put on devices connected to the internet.
Hopefully in the near future we can have air-gapped signed #nostr transactions so that we don’t have to take the private key out from our secure devices.
nostr:note16g020j8dhs6n2fpmfg88qj9s8wdpy5nw85s5zedk6lan89q8dxusr3f6fj
Discussion
Thank you!!
I will continue to share what I learn in this journey.