MC-39109: Vault throw The requested Payment Method is not available. error

Author: rostyslav-hymon

app/code/Magento/Vault/Plugin/PaymentVaultInformationManagement.php

@@ -0,0 +1,68 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\Vault\Plugin;
+
+use Magento\Checkout\Api\PaymentInformationManagementInterface;
+use Magento\Quote\Api\Data\AddressInterface;
+use Magento\Quote\Api\Data\PaymentInterface;
+use Magento\Vault\Model\PaymentMethodList;
+use Magento\Store\Model\StoreManagerInterface;
+
+/**
+ * Payment vault information management process
+ */
+class PaymentVaultInformationManagement
+{
+    /**
+     * @var PaymentMethodList
+     */
+    private $vaultPaymentMethodList;
+
+    /**
+     * @var StoreManagerInterface
+     */
+    private $storeManager;
+
+    /**
+     * PaymentVaultInformationManagement constructor.
+     *
+     * @param PaymentMethodList $vaultPaymentMethodList
+     * @param StoreManagerInterface $storeManager
+     */
+    public function __construct(
+        PaymentMethodList $vaultPaymentMethodList,
+        StoreManagerInterface $storeManager
+    ) {
+        $this->vaultPaymentMethodList = $vaultPaymentMethodList;
+        $this->storeManager = $storeManager;
+    }
+
+    /**
+     * Set available vault method code without index to payment
+     *
+     * @param PaymentInformationManagementInterface $subject
+     * @param string $cartId
+     * @param PaymentInterface $paymentMethod
+     * @param AddressInterface|null $billingAddress
+     * @return void
+     * @SuppressWarnings(PHPMD.UnusedFormalParameter)
+     */
+    public function beforeSavePaymentInformation(
+        PaymentInformationManagementInterface $subject,
+        string $cartId,
+        PaymentInterface $paymentMethod,
+        AddressInterface $billingAddress = null
+    ): void {
+        $availableMethods = $this->vaultPaymentMethodList->getActiveList($this->storeManager->getStore()->getId());
+        foreach ($availableMethods as $availableMethod) {
+            if (strpos($paymentMethod->getMethod(), $availableMethod->getCode()) !== false) {
+                $paymentMethod->setMethod($availableMethod->getCode());
+            }
+        }
+    }
+}

app/code/Magento/Vault/etc/di.xml

@@ -53,4 +53,8 @@
             </argument>
         </arguments>
     </type>
+    <type name="Magento\Checkout\Api\PaymentInformationManagementInterface">
+        <plugin name="ProcessPaymentVaultInformationManagement"
+                type="Magento\Vault\Plugin\PaymentVaultInformationManagement"/>
+    </type>
 </config>