Validate payment request endpoint

[FrancisPouliot]

What I imagine is a "Bitcoin payment destination endpoint".

• The app sends whatever Bitcoin address user enters
• We check all the possibilities
• Returns, if valid: type
• Returns, if we don't find a valid type: invalid

What do look for?

• is it a valid non-p2sh address
• Is it a P2SH-wrapped segwit address (can we know this?)
• Is it a bech32 address?
• Is it a Bolt 11 invoice?
• Is it PayNym?
• Is it a valid BIP21 URI?

We should be able to do this with the existing PyCoin library and C-Lighinthning, otherwise we should look at Bitcoin-JS or other libs.

[thibistaken]

Is this done or still WIP @Kexkey? 🙏