I'm back to trying to integrate Apple Pay into the DNA Lounge store. How does "onvalidatemerchant" work with authorize.net?
All of the example code says that my backend needs to retrieve a merchantSession from Apple by connecting to the "validationURL" passed to "onvalidatemerchant" by using CURLOPT_SSLCERT and/or CURLOPT_SSLKEY, but I think I don't have the private key -- only authorize.net has that, right? All I have is the CER file. So how do I get the merchantSession from Apple?