Display QR code in "Verify Safety Number"

[riyapenn]

• I have searched open and closed issues for duplicates

---

Bug description

Add display of QR code (for a separate phone to scan)

Steps to reproduce

• Go to 1:1 chat
• Menu/Conversation Setting
• Verify Safety Number

Actual result: See the 60-digit number
Expected result: See a QR Code and 60-digit number

Screenshots

[liliakai]

I think to do this we're going to need to migrate to a qr code library that accepts arbitrary buffers of data as input. Our current library only accepts strings, and javascript only supports UTF-16 strings, but the mobile clients are looking for a qr code that decodes to a Latin-1 encoded string.

The scannableFingerprint branch contains a WIP implementation which (last I checked) works except for this string encoding issue.

[jonathancross]

@liliakai Any updates on this?
Also where is the scannableFingerprint branch mentioned?