Take a lightning invoice and broadcast it encoded in audio. Separately listen for such a broadcast and decode it to a lightning invoice. Pay the invoice via webln.
First compose an invoice, once it's ready it can be broadcast (turn your volume ON):
Be sure to have this pane open, and listening before you broadcast as above:
yarn or whatever js package manager to install things - it's just a single page react/js (or ts) app.
Excuse the very unrefactored messy code - this was put together kind of fast.
- supersonic
- better error handling (maybe first broadcast how much data is expected?)
- figure out how to send data in as short an amount of time as possible
- adapt/test for/on non-smart phones, or other devies altogether (so far it's just tested on a decent laptop)