Got thinking about Nostr Connect (NIP46) setups, triggered by nostr:npub1nqulzcxcj0d2uesusstgupl5du8pa96xl6uy8xndweeckjkn964qjs23sn .

There are two apps involved:

[1] client app (wants to sign, has no sec key)

[2] keystore app

Different setups are possible:

- client in browser, keystore in browser extension (like Alby)

- client in desktop browser, keystore in mobile app: display/scan QR code

- client in mobile browser, keystore in app (same device) -- ? maybe deeplink+NIP89 app handler

Manually swtiching to the app and copypasting connect string is a fallback, but terrinle UX.