For absolute beginners, how do I sign a new address format (e.g. taproot)? Ride the Lightning (RTL) has the possibility to sign lightning messages.
However, it must be signed from a specific on-chain address. I also tried bitcoin-cli signmessage <adr> <msg> However, this did not work for taproot addresses or Bech32 addresses (both generated from RTL).
The error message returned is:
error code: -32601
error message:
Method not found
It looks like you don’t know the signmessage command?
I also found this thread. However, I currently don’t know where I can get the private key for the proposed solution. signmessagewithprivkey