Bugfix: Prevent the store credit to be restored twice after cancelation

#761

Plugin/CustomerBalance/Observer/PreventDoubleCreditRevert.php

@@ -0,0 +1,37 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Mollie\Payment\Plugin\CustomerBalance\Observer;
+
+use Magento\Framework\Event\Observer;
+use Magento\Sales\Api\Data\OrderInterface;
+
+class PreventDoubleCreditRevert
+{
+    public function aroundExecute($subject, callable $proceed, Observer $observer)
+    {
+        $order = $observer->getData('order');
+        if (!$order ||
+            !$order instanceof OrderInterface ||
+            !$order->getPayment()
+        ) {
+            return $proceed($observer);
+        }
+
+        if ($observer->getEvent()->getName() == 'restore_quote' &&
+            $this->isMollieOrder($order)
+        ) {
+            return $subject;
+        }
+
+        return $proceed($observer);
+    }
+
+    private function isMollieOrder(OrderInterface $order): bool
+    {
+        $payment = $order->getPayment();
+
+        return strstr($payment->getMethod(), 'mollie_methods_') !== false;
+    }
+}

etc/di.xml

@@ -365,6 +365,10 @@
         </arguments>
     </type>
 
+    <type name="Magento\CustomerBalance\Observer\RevertStoreCreditObserver">
+        <plugin name="mollie_prevent_double_credit_revert" type="Mollie\Payment\Plugin\CustomerBalance\Observer\PreventDoubleCreditRevert" />
+    </type>
+
     <!-- Payment methods configuration start -->
     <!-- ApplePay -->
     <type name="Mollie\Payment\Model\Methods\ApplePay">