Thinking in "QR codes per dollar" or "satoshis per second" – I love ecash math 🧡

"The above means that if we think of most payments as 5-10 proofs payments, and each proof is about 100 bytes, and each Version 10 QR code can carry 100 bytes, we should be able to make just about any payment under $500 with 10 QR codes' worth of data depending on the error correction level one might aim for. Using Fountain Codes, you can expect this to be transmitted in 10-16 codes, somewhere around 1-3 seconds depending on the delay between QR codes."