title: Apple Pay on web Merchant validation
body: <p>I Managed to retrieve merchantSession object from Apple Pay server as below. I used Sandbox Test (Setup on itunesconnect and login the sandbox account on iphone and added tested visa card) </p>
  
  <pre><code>{
      "epochTimestamp":15065...20,
      "expiresAt":1506527672620,
      "merchantSessionIdentifier":"2EF498A9E...C24",
      "nonce":"f32....9",
      "merchantIdentifier":"7941CB932...DE2",
      "domainName":"mywebsite.com",
      "displayName":"My Test Shop",
      "signature":"30800609....0000"
  }
  </code></pre>
  
  <p>However, in the Apple Pay pop-up sheet, it still stuck at "Processing", what do I need to do to able to process the next stage to show the "Touch Id"?</p>
  
  <p>Also, below is my code snippet for onvalidatemerchant:</p>
  
  <pre><code>session.onvalidatemerchant = (event) =&gt; {
          console.log("Validate merchant");
          const validationURL = event.validationURL;
          getApplePaySession(event.validationURL).then(function(response) {
              console.log(response);
              session.completeMerchantValidation(response);
          });
      };
  </code></pre>