We created our own payment module and it is working for Magento 1.9
We enabled Paypal Express Checkout in the configuration and it is also working.
But we need to update one field in the payment table once Paypal checkout is success.
But after user complete paypal checkout, it takes the user to success page.
How can we grab Paypal's response and make update this one field in the payment table before redirecting user to this success page?
We are new with Magento
Figured it out