Lightning Network Integration

[prusnak]

There are two high-level areas of Lightning Network integration:

1. for LN node operators

• non-interactive TX signing (if sum(inputs) = sum(outputs) + epsilon)

2. for LN users

• interactive open/close channel
• interactive send LN TX

[brianddk]

Is the idea to allow HTLC signing in Trezor firmware?

I know Electrum already does LN-channel open/close on Trezor, but they don't have a good way to get the HTLC txns signed so they create a second key for HTLC signing that is not housed in Trezor. Obviously having a signing key in a SW wallet is always dangerous, so it would be nice if this part of LN could be handled in firmware.