What about a bolt like bolt 12 but with a fallback to create eCache tokens if the recipients node is offline. When the node comes back online, the proofs are melted and paid to the node.
nostr:nprofile1qqsrf5h4ya83jk8u6t9jgc76h6kalz3plp9vusjpm2ygqgalqhxgp9gpzfmhxue69uhk7enxvd5xz6tw9ec82cspp4mhxue69uhkummn9ekx7mqpzpmhxue69uhkummnw3ezumrpdejqd2970s nostr:nprofile1qqs9pk20ctv9srrg9vr354p03v0rrgsqkpggh2u45va77zz4mu5p6ccpzemhxue69uhk2er9dchxummnw3ezumrpdejz7qgkwaehxw309a5xjum59ehx7um5wghxcctwvshszrnhwden5te0dehhxtnvdakz7qrxnfk #lightning #dev #ecash
Anything out there in the wild like this?