def validate()

in service/sdk_validator/resdb_validator/models.py [0:0]

• 12 lines of code
• 9 McCabe index (conditional complexity)

    def validate(self, resdb=None, current_transactions=[]):
        """Validate transaction spend
        Args:
            resdb (ResDB): an instantiated resdb_validator.ResDB object.
        Returns:
            The transaction (Transaction) if the transaction is valid else it
            raises an exception describing the reason why the transaction is
            invalid.
        Raises:
            ValidationError: If the transaction is invalid
        """
        input_conditions = []

        if self.operation == Transaction.CREATE:
            duplicates = any(txn for txn in current_transactions if txn.id == self.id)
            if resdb and  resdb.is_committed(self.id) or duplicates:
                raise DuplicateTransaction('transaction `{}` already exists'
                                           .format(self.id))

            if not self.inputs_valid(input_conditions):
                raise InvalidSignature('Transaction signature is invalid.')

        elif self.operation == Transaction.TRANSFER:
            self.validate_transfer_inputs(resdb, current_transactions)

        return self