def verify_signature(self, address, signature, hexdata):
        """Verify <signature> of <hexdata> by <address>."""
        try:
            address = deserialize.address(self.testnet, address)
            data = deserialize.binary(hexdata)
            signature = deserialize.signature(signature)
            return control.verify_signature(self.testnet, address,
                                            signature, data)
        except exceptions.InvalidAddress:
            return False
Verify <signature> of <hexdata> by <address>.