I'm back to trying to integrate Apple Pay into the DNA Lounge store. How does "onvalidatemerchant" work with authorize.net?
I got an Apple CSR from authorize.net and submitted that CSR to Apple. That gave me my merchant ID, "merchant.com.dnalounge.store", and the CER file "apple_pay.cer".
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?