I think you can do that with Breez Wallet.
Discussion
Different architecture. I am not using Lightning channels or Lightning service providers. To my knowledge, you can’t store personal encrypted data.
Minibits Wallet stores Bitcoin in Ecash format, and provides a wallet seed and backup function that allows you to do a full restore in the event of some catastrophe.
The next generation wallet from Breez stores bitcoin on-chain in Liquid and transacts over Lightning. No channels to maintain and full seed phrase recovery.
This is the dream
I’ve been testing a couple of them, so far I’m impressed. They don’t do everything I want yet, but it’s promising.
I know that. I am using Cashu mints and nostr relays. I am not planning to use Liquid. As for the plan, payments are just the beginning- I plan to add secure private records, such as credentials, medical records, etc.