Remove 'spend_points' from session after order placement

Plugin/RemoveSpendPointsFromSession.php

@@ -0,0 +1,36 @@
+<?php declare(strict_types=1);
+/**
+ * @copyright   Copyright (c) Vendic B.V https://vendic.nl/
+ */
+
+namespace Vendic\HyvaCheckoutMirasvitRewards\Plugin;
+
+use Magento\Checkout\Model\Session;
+use Magento\Quote\Api\CartManagementInterface;
+
+class RemoveSpendPointsFromSession
+{
+
+    private const SPEND_POINTS = 'spend_points';
+
+    public function __construct(private Session $checkoutSession)
+    {
+    }
+
+    /**
+     * After an order is placed, the spent points should be
+     * reset to zero on the session so that the old spent points won't
+     * be displayed again on the checkout page.
+     *
+     * @param CartManagementInterface $subject
+     * @param int $result
+     * @return int
+     */
+    public function afterPlaceOrder(
+        CartManagementInterface $subject,
+        $result,
+    ) {
+        $this->checkoutSession->setData(self::SPEND_POINTS, 0);
+        return $result;
+    }
+}

etc/frontend/di.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0"?>
+<!--
+/**
+ * @copyright   Copyright (c) Vendic B.V https://vendic.nl/
+ */
+-->
+<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
+    <type name="Magento\Quote\Api\CartManagementInterface">
+        <plugin name="vendic_remove_spend_points_from_checkout_session"
+                type="Vendic\HyvaCheckoutMirasvitRewards\Plugin\RemoveSpendPointsFromSession"/>
+    </type>
+</config>