Anybody knows how a backup would work in the ecash/spillman channel based approach to a self-custody LN payment wallet? Seed & descriptor? Channel state? Anything else?

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PS I note nostr:npub1htnhsay5dmq3r72tukdw72pduzfdcja0yylcajuvnc2uklkhxp8qnz3qac  hasn't been posting on nostr since 2023 😞