docs: def verifymessage(self, address, signature, message):
          """
          Verifies that a message has been signed by an address.
  
          Args:
            address (str): address claiming to have signed the message
            signature (str): ECDSA signature
            message (str): plaintext message which was signed
  
          Returns:
            bool: True if the address signed the message, False otherwise
  
          """
          verified = self.rpc.call("verifymessage", address, signature, message)
          self.logger.debug("Signature verified: %s" % str(verified))
          return verified