There is already a working concept in command line wallets to lock the sent token to receiver's pubkey.
That way offline send can work without the risk of sender double spend before receiver comes online.
Will take some time until it lands in mobile wallets. Naive offline send/receive proof of concept is available in Minibits.
Minibits
npub1kv…9tkzv
2024-02-24 23:48:38
in reply to nevent1q…64d0
Author Public Key
npub1kvaln6tm0re4d99q9e4ma788wpvnw0jzkz595cljtfgwhldd75xsj9tkzvPublished at
2024-02-24 23:48:38Event JSON
{
"id": "26db55173ab6ed4ae4674d1169314137dfc9924af22e6f454df4655938c2c5b8",
"pubkey": "b33bf9e97b78f35694a02e6bbef8e77059373e42b0a85a63f25a50ebfdadf50d",
"created_at": 1708818518,
"kind": 1,
"tags": [
[
"e",
"61afb9755fc8605c20f03ea09b62b89f7b70345b831f347dd416346eff056f39",
"",
"root"
],
[
"e",
"d60c839da134a63775ab418b102d16adf55359bbd7ff02711d754fe9018dc2a9"
],
[
"e",
"a296e19c2320a82394131073a4f0680bb1b2175f550919094cec6cb148b68b38",
"",
"reply"
],
[
"p",
"e88a691e98d9987c964521dff60025f60700378a4879180dcbbb4a5027850411"
],
[
"p",
"6e468422dfb74a5738702a8823b9b28168abab8655faacb6853cd0ee15deee93"
],
[
"p",
"9303ab260a6c7653fc8ea3b041d533c2c678c1e3c4772a05e9f53b8be99869c7"
],
[
"p",
"8fb9450003a599bb1b34f03fadb9b137f6c0e5a850ba205964bee4732ccce549"
]
],
"content": "There is already a working concept in command line wallets to lock the sent token to receiver's pubkey. \n\nThat way offline send can work without the risk of sender double spend before receiver comes online.\n\nWill take some time until it lands in mobile wallets. Naive offline send/receive proof of concept is available in Minibits.",
"sig": "d936b7d965b0f38dbad3ebb4664600929c538dfa9e3213582ebe9d0e675c8ef7bb5c0ab6bb517582ded29c234a86c3baec109cc5facc1c425e44f26c975006c4"
}