Issue #3436134: Check billing profile value before calling get

Closes #3436134

src/Plugin/Commerce/PaymentGateway/CommerceStripeCheckoutCheckout.php

@@ -21,6 +21,8 @@ use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
 use Symfony\Component\HttpFoundation\RedirectResponse;
 use Symfony\Component\HttpFoundation\Request;
+use Drupal\address\AddressInterface;
+use Drupal\profile\Entity\ProfileInterface;
 
 /**
  * Provides the Stripe Checkout payment gateway plugin.
@@ -193,8 +195,9 @@ class CommerceStripeCheckoutCheckout extends OffsitePaymentGatewayBase implement
    * {@inheritdoc}
    */
   public function setCommerceStripeCheckoutCheckoutData(PaymentInterface $payment) {
+    $nvp_data = [];
     $order = $payment->getOrder();
-
+    $billing_profile = $order->getBillingProfile();
     $amount = $payment->getAmount();
     $configuration = $this->getConfiguration();
 
@@ -227,14 +230,19 @@ class CommerceStripeCheckoutCheckout extends OffsitePaymentGatewayBase implement
       'nonce' => $nonce,
     ];
 
-    $address = $order->getBillingProfile()->get('address')->first();
+    $address = $billing_profile instanceof ProfileInterface ? $billing_profile->get('address')->first() : NULL;
+
+    if ($address instanceof AddressInterface) {
+      $nvp_data += [
+        'fname' => $address->getGivenName(),
+        'lname' => $address->getFamilyName(),
+        'country' => $address->getCountryCode(),
+        'city' => $address->getLocality(),
+      ];
+    }
 
     // The hidden data wich should be transported to CommerceStripeCheckout.ro.
-    $nvp_data = [
-      'fname' => $address->getGivenName(),
-      'lname' => $address->getFamilyName(),
-      'country' => $address->getCountryCode(),
-      'city' => $address->getLocality(),
+    $nvp_data += [
       'email' => $order->getEmail(),
       'amount' => Calculator::round($amount->getNumber(), 2),
       'currency' => $amount->getCurrencyCode(),