Add subcription feature 4

shared/exceptions/payment_exceptions.py

@@ -67,4 +67,14 @@ class SubscriptionUpdateFailed(PaymentException):
 class PaymentServiceError(PaymentException):
     """General payment service error"""
     def __init__(self, message: str = "Payment service error"):
+        super().__init__(message)
+
+class PaymentMethodError(PaymentException):
+    """Exception raised when payment method operations fail"""
+    def __init__(self, message: str = "Payment method operation failed"):
+        super().__init__(message)
+
+class CustomerUpdateFailed(PaymentException):
+    """Exception raised when customer update operations fail"""
+    def __init__(self, message: str = "Customer update failed"):
         super().__init__(message)