[FEATURE] add the blinded paths invoices option #642
Description
Is your feature request related to a problem? Please describe.
During the "Receive ⚡" operation, it would be amazing to have the possibility to choose whether to create a blinded paths invoice.
Describe the solution you'd like
Add a toggle "Blinded [yes|no]" to choose if the invoice should be blind or not.
Optional, add three flags (explicitly marked as advanced) to define the CLI equivalent for --min_real_blinded_hops, --num_blinded_hops and --max_blinded_paths.
Describe alternatives you've considered
Doing it by using the CLI (option --blind), not very user friendly.
Additional context
Due to the length of the blinded invoice, the corresponding QRCode would be bigger if compared to traditional invoices. A solution could be to generate the QRCode only if it fits "decently" given the parameters above, and in case it does not, just provide the text-based invoice in a resizable textbox.
Maybe a useful hint can be shown in advance when the parameters above would create a very long invoice.