This is essentially how the async payment spec works for Lightning. Something that we hopefully get at the protocol level later this year. In a non custodial way too.
nostr:npub1mutnyacc9uc4t5mmxvpprwsauj5p2qxq95v4a9j0jxl8wnkfvuyque23vg I have a Mutiny+ feature request. An LSP that is always online to receive sats, but instantly transfers them to my local wallet whenever I come online. Its the best of both worlds:
* 100% uptime
* self custody 99% of the time
Discussion
Ah, didn't know that. Hell yeah.