def verify(self, item_check_callable=None, test=True):
"""
Verifies an IPN.
Checks for obvious signs of weirdness in the payment and flags appropriately.
You can provide a function `item_check_callabe` that takes a PayPalIPN instance
and returns (True, None) if the item is valid. Returns (False, "reason") if
the item isn't valid. This function should check that `mc_gross`, `mc_currency`
`item_name` and `item_number` are all correct.
"""
from paypal.standard.helpers import duplicate_txn_id
if self._postback(test):
if self.is_transaction():
if self.payment_status != "Completed":
self.set_flag("Invalid payment_status.")
if duplicate_txn_id(self):
self.set_flag("Duplicate transaction ID.")
if self.receiver_email != settings.PAYPAL_RECEIVER_EMAIL:
self.set_flag("Invalid receiver_email.")
if callable(item_check_callable):
flag, reason = item_check_callable(self)
if flag:
self.set_flag(reason)
else:
# ### To-Do: Need to run a different series of checks on recurring payments.
pass
if self.flag:
payment_was_flagged.send(sender=self)
else:
if self.is_subscription_cancellation():
subscription_was_cancelled.send(sender=self)
elif self.is_subscription_signup():
subscription_was_signed_up.send(sender=self)
elif self.is_subscription_end_of_term():
subscription_was_eot.send(sender=self)
elif self.is_subscription_modified():
subscription_was_modified.send(sender=self)
else:
payment_was_successful.send(sender=self)
def verify_secret(self, form_instance, secret):
"""
Verifies an IPN payment over SSL using EWP.
"""
from paypal.standard.helpers import check_secret
if not check_secret(form_instance, secret):
self.set_flag("Invalid secret.")
if self.flag:
payment_was_flagged.send(sender=self)
else:
if self.is_subscription_cancellation():
subscription_was_cancelled.send(sender=self)
elif self.is_subscription_signup():
subscription_was_signed_up.send(sender=self)
elif self.is_subscription_end_of_term():
subscription_was_eot.send(sender=self)
elif self.is_subscription_modified():
subscription_was_modified.send(sender=self)
else:
payment_was_successful.send(sender=self)