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sipa / bech32

Code snippets and analysis of the Bech32 format
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bip72b payment requests and qrcodes #8

Closed inaltoasinistra closed 7 years ago

inaltoasinistra commented 7 years ago

In alphanumeric qrcode encoding it is not possible to encode a bip72b – bitcoin:?r=https://dev/null – payment requests urls because ? and = are missed.

We could introduce a new bip72 URI to use alphanumeric encoding in qrcode payment requests

(It would be more like BITCOIN:*HTTPS://DEV/NULL)

sipa commented 7 years ago

@the9ull Alphanumeric encoding is decided on a character-by-character basis, and is advantageous as soon as there are more than a few consecutive uppercase/numeric characters.

Having a few lowercase and/or non-alphanumeric characters in a QR code doesn't hurt. Switching between uppercase and lowercase all the time does.