def SignMessage(self, request, context):
        """lncli: `signmessage`
        SignMessage signs a message with this node's private key. The returned
        signature string is `zbase32` encoded and pubkey recoverable, meaning that
        only the message digest and signature are needed for verification.
        """
        context.set_code(grpc.StatusCode.UNIMPLEMENTED)
        context.set_details('Method not implemented!')
        raise NotImplementedError('Method not implemented!')
lncli: `signmessage`
        SignMessage signs a message with this node's private key. The returned
        signature string is `zbase32` encoded and pubkey recoverable, meaning that
        only the message digest and signature are needed for verification.
        
home.admin/config.scripts/lndlibs/lightning_pb2_grpc.py