    def validate_schema(cls, tx):
        """Validate the validator election vote transaction. Since `VOTE` extends `TRANSFER`
           transaction, all the validations for `CREATE` transaction should be inherited
        """
        _validate_schema(TX_SCHEMA_COMMON, tx)
        _validate_schema(TX_SCHEMA_TRANSFER, tx)
        _validate_schema(cls.TX_SCHEMA_CUSTOM, tx)
Validate the validator election vote transaction. Since `VOTE` extends `TRANSFER`
transaction, all the validations for `CREATE` transaction should be inherited
bigchaindb/elections/vote.py