NATS4 PayPal
Set up on PayPal's Website
Signup with PayPal and verify your e-mail address. To setup your purchase options, click on the Profile tab under My Account. The first thing you will need to setup is the "Instant Payment Notification Preferences" Turn the notifications on and set the URL to be (replace linkdomain with your NATS linkdomain):
http://<LINKDOMAIN>/signup/process_paypal.php
Next setup the "Website Payment Preferences" Set Auto Return to On and the Return URL:
http://<LINKDOMAIN>/signup/returnurl_paypal.php
Set the Payment Data Transfer to On and copy out the Identity Token created for you.
Finally "Create PayPal payment button" Add all of the options you wish to make available for purchase and copy down the hosted_button_id for each button.
NOTE: Free trials are currently not 100% supported by NATS, because Paypal does not return PDT information for free trials. Paypal does not return the information required to identify a member when performing a free trial. If you still want to offer the free trial, please alter the cascade_security template for your sites, keeping in mind that the person shown that template may or may not have been signed up to your site. If you would like free trials to work the same as normal sales for cascading, please ask Paypal to return Payment Data Transfer in the return url for free trials.
Set up PayPal in NATS
Go to Billers Admin, click the Biller drop-down, select PayPal, and click Add. Enter the PayPal E-mail Address you setup and your PayPal Identity Token. If you wish to test PayPal with the sandbox, you can check the box to put PayPal in testing.
Go to the Join Options section for your site. Create or edit a Join Option and enter the the PayPal hosted_button_id. you recorded earlier into the PAYPAL Hosted Button Id field. Click Save.
PayPal can now be added as a biller in your cascade. Please run a real transaction through PayPal before you make it live in your cascade.