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We’ve built a Microsoft .NET application that uses a licensing component called CryptoLicensing (http://www.ssware.com/cryptolicensing/cryptolicensing_net.htm). Since our web host for WordPress can’t run Windows web services, we pre-generate the license keys for our application in advance and store them in a text file.
When PayPal sends us the IPN, we need to read the next available key out of the file, email it to the user, and record which PayPal transaction (including user name and email address) got assigned which license key.
I’ve seen other shopping cart and e-commerce solutions do something similar. It seems like something that could be done easily in eStore’s PHP script.
(Thank you for your quick response to my question. I really appreciate your help!)
This sounds like exactly what I need as well. Is there any chance you could share your modifications to paypal.php? It’d be a big help.
This plugin sounds very close to what I’d need as well. In my case, I’m selling an installed software product, and I need to provide a license key in the response email either by calling an external license service or my reading a text file containing available license keys.
So count me as another vote for releasing/selling this plugin or addon.