Rough notes, not a finished piece — mostly for my own reference before presenting.
- Offers are reusable, unlike BOLT11 invoices — a single offer (encoded as a
lno1...string) can be paid multiple times by different payers. - Uses onion messages for the invoice-request/invoice round trip instead of requiring a direct channel or an out-of-band HTTP call.
- Blinded paths hide the actual recipient node behind a chain of intermediate hints — worth comparing directly against how onion routing hides the payment path, since it’s a related but distinct privacy mechanism.
- Still need to check: how do refunds work when an offer is a “send” rather than a “receive” offer? Follow up before the session.