Nostr Web Client

Is there anything in Bolt12 that can allow offline generation of offers, like you can with on bolt11 by setting the payment_secret to a HMAC + ID used to derive a preimage/payment_hash, and possibly payment_metadata that is sent in the onion?

jb55 1mo ago 💬 2

good question nostr:npub179e9tp4yqtqx4myp35283fz64gxuzmr6n3yxnktux5pnd5t03eps0elz4s

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Discussion

jb55 1mo ago 💬 2

I would assume not ?

semisol 1mo ago 💬 1

Yes you can I think actually!

offer_metadata, along with a fake node, and a hint to try via the real node can do this.

🚀

semisol 1mo ago 💬 1

I read the spec and there’s a lot more than I thought, damn

I will be implementing bolt12 payments into my payment server and as a payment method for my services.

jb55 1mo ago 💬 1

yeah and its all in TLV format instead of something custom which is nice

semisol 1mo ago 💬 1

yeah I am implementing this. running a CLN node so it should be easy.

I could probably make in a few hours an offline payments plugin as well but that is for another day.

casey 1mo ago 💬 1

Now yer cookin’!

LFG 👏

I knew there had to be a way with lightning. Let me know if/when you want to test anything!

semisol 1mo ago 💬 1

honestly I want to do offline/asymmetric bolt11/12 as it means I can generate stateless invoices (which is good for Vitor’s dumb notify spec) and also means no more node latency for creating an invoice

semisol 1mo ago

I do not have time for it yet though, SE work is taking up a lot of it

Rusty Russell 1mo ago

Yep! You create a blinded path via a known node (or, if you want, more than one). You can put as many (fake) hops in those paths as you want.

semisol 1mo ago

If there is, this allows immensely more capabilities than Cashu.

No more need to agree on a specific mint, one-side-offline payments just work interoperably.

It could probably be extended anyway to allow that.