Create transaction_validation.py

transaction_processing/transaction_validation.py

@@ -0,0 +1,31 @@
+import re
+
+class TransactionValidation:
+    def __init__(self):
+        self.validation_rules = {
+            'account_number': {
+                'regex': r'^\d{10}$',
+                'message': 'Invalid account number format. Please enter a 10-digit account number.'
+            },
+            'amount': {
+                'min': 0,
+                'max': 1000000,
+                'message': 'Transaction amount must be between 0 and 1,000,000.'
+            }
+        }
+
+    def validate_transaction(self, transaction):
+        errors = []
+        for field, rules in self.validation_rules.items():
+            if field in transaction:
+                for rule in rules:
+                    if rule == 'regex':
+                        if not re.match(rules[rule], transaction[field]):
+                            errors.append(rules['message'])
+                    elif rule == 'min':
+                        if float(transaction[field]) < rules[rule]:
+                            errors.append(f'Transaction amount must be at least {rules[rule]}')
+                    elif rule == 'max':
+                        if float(transaction[field]) > rules[rule]:
+                            errors.append(f'Transaction amount must not exceed {rules[rule]}')
+        return errors