I'm not sure how it works and it may require a hot signer now that I think about it. nostr:nprofile1qqs827g8dkd07zjvlhh60csytujgd3l9mz7x807xk3fewge7rwlukxgpz4mhxue69uhhyetvv9ujuerpd46hxtnfduhszrnhwden5te0dehhxtnvdakz7auvdel maybe you could shed some light?
Discussion
If we're talking about using Amber, then yes. That uses either NIP-55 to sign for apps that are locally installed, such as Amethyst, or NIP-46 to sign remotely, usually for web-apps. In both of those cases, Amber has to have the private key stored locally on the device, or "hot" as you put it.