1) Update DAP Setup > Config -> Secret Authorization Key to be…
2) Point the Google Checkout IPN handler to
(replace yoursite.com with the name of your site).
3) Create a DAP product and make sure the item name that your GC Item Name exactly matches the DAP Product Name.
You will find a file by name dap-gc-responsehandler.php in your dap folder.
Use this file as is, with no changes, during testing. Nothing to change.
But once you’re ready to go live, open the file, and find the line below:
$server_type = “‘sandbox”;
And change it to:
$server_type = “‘production”;