"""
Subscription-related exceptions
"""

class SubscriptionException(Exception):
    """Base class for subscription-related exceptions"""
    pass

class SubscriptionNotFound(SubscriptionException):
    """Exception raised when subscription is not found"""
    def __init__(self, message: str = "Subscription not found"):
        super().__init__(message)

class SubscriptionAlreadyExists(SubscriptionException):
    """Exception raised when subscription already exists"""
    def __init__(self, message: str = "Subscription already exists"):
        super().__init__(message)

class SubscriptionUpdateFailed(SubscriptionException):
    """Exception raised when subscription update fails"""
    def __init__(self, message: str = "Subscription update failed"):
        super().__init__(message)