PiWalletSV integration

[optimist555]

The new and exciting PiWalletSV device looks very promising. The developer states this can be made to work with ElectrumSVP as an air-gapped signing device. Is a feature like this planned?

https://piwalletsv.com/protocol/

[TruthMachine]

I am not sure exactly how the model works for Pi wallet signing, but its possible it could already be compatible with ElectrumSVP in some way. I have some ideas on how to implement ElectrumSVP with a similar scheme, or with multi-sig, and may investigate this for a future version.