code: def validate_transaction(self, tx, current_transactions=[]):
          
  
          transaction = tx
  
          # CLEANUP: The conditional below checks for transaction in dict format.
          # It would be better to only have a single format for the transaction
          # throught the code base.
          if isinstance(transaction, dict):
              try:
                  transaction = Transaction.from_dict(tx)
              except SchemaValidationError as e:
                  logger.warning('Invalid transaction schema: %s', e.__cause__.message)
                  return False
              except ValidationError as e:
                  logger.warning('Invalid transaction (%s): %s', type(e).__name__, e)
                  return False
          return transaction.validate(self, current_transactions)
docs: Validate a transaction against the current status of the database.