After upgrading to 1.9 from 1.7 my themes onepage checkout is not working. How would I go about debuging this. It is getting stuck at the.
Ran across this tip that fixed it for me. Essentially it looks like they forgot to include the formKey in the saveOrder ajax request. Find app / design / frontend ...
Transaction Flow is bit different in case of "Express Checkout". I suggest you to use sales_order_place_after event and use payment method code to check for ...
File: vendor/magento/module-checkout/Controller/Cart/Add.php.