move from Paypal IPN/PDT to REST API

The payment came out of the subscribers Paypal account and into our account with the same time stamp as the PDT error. Does the log message help?

Paypal: Error: Received FAIL result message from Paypal: Sorry your payment has not been processed. Transaction result:FAIL
Error: 4020. Please try again and notify system administrator.

Call trace:
called in class cbpaidHistory::logError() on line 571 in file cbpaidPayHandler.php
called in class cbpaidPayHandler::_setLogErrorMSG() on line 1632 in file cbpaidsubscriptions.paypal.php
called in class cbpaidpaypal::handlePaypalPDT() on line 339 in file cbpaidsubscriptions.paypal.php
called in class cbpaidpaypal::handleReturn() on line 136 in file cbpaidHostedPagePayHandler.php
called in class cbpaidHostedPagePayHandler::resultNotification() on line 774 in file cbpaidControllerCBTab.php
called in class cbpaidControllerCBTab::getTabComponent() on line 1155 in file cbpaidsubscriptions.php
called in class getcbpaidsubscriptionsTab::getTabComponent() on line 92 in file cbpaidControllerCBComponent.php
called in class CBplug_cbpaidsubscriptions::getCBpluginComponent() on line 879 in file cbPluginHandler.php
called in class cbPluginHandler::call() on line 1611 in file cbTabs.php
called in class cbTabs::_callTabPlugin() on line 1725 in file cbTabs.php
called in class cbTabs::tabClassPluginTabs() on line 732 in file comprofiler.php
called in function tabClass() on line 284 in file comprofiler.php

Strange. PayPal itself is sending an error code with the PDT. Please PM backend super user login credentials and provide the username of the user this is happening to and will take a look at the logs to see what's going on as something is causing PayPal to redirect them back with a failed response. As for the payment still happening I'm betting it's a retry attempt that's finally paying, but the IPN from that should pay the basket fine.

Are you absolutely sure your Identity Token is correct? That's the only reason I can think of for that check to fail.

Have reviewed your install. All PDT are failing due to them not authenticating during the /cgi-bin/webscr API call when checking _notify-synch. This is almost exclusively due to the "Your PayPal Identity Token" parameter being incorrect.

Within your PayPal account navigate to Settings (gear icon) > Seller tools > Website preferences. The below URL should take you there directly.

www.paypal.com/unifiedsettings/webPreferences

Once there please configure the following.

Auto return for website payments: On
Payment data transfer: On
Encrypted website payments: Off

Now copy your "Identity Token" to CBSubs in your PayPal gateway to the "Your PayPal Identity Token" parameter. Please be sure you've carefully copied it exactly as shown. This must be done for the account that's handling the payments. The same account that you've supplied Merchant ID from.

Thanks for having a look. 

Those settings are all as they should be. I copied the identity token from both places and compared them, 100% identical, no trailing spaces or anything amiss that I can see. I've copied over the token again just in case.

Stephen

Tried to send a private message but the screen just flashes and won't accept text; am I doing something wrong?

Very strange. That's the only reason for that error to happen as it's a response from PayPal's own API. I'm not sure what more to suggest at this time. I'll dig further into this and see if maybe there's something wrong with the API during the deprecation.

I've also bumped up the PayPal REST payment gateway to be my next task so I'll be starting that this or next week. Hopefully it won't take too long to get implemented. I'll be leaving the current PayPal gateway untouched for backwards compatibility and this will be an entirely separate gateway included with CBSubs.