invalid form key problem - solved

Controller/Response/IyzicoCheckoutForm.php

@@ -1,23 +1,4 @@
 <?php
-/**
- * iyzico Payment Gateway For Magento 2
- * Copyright (C) 2018 iyzico
- * 
- * This file is part of Iyzico/Iyzipay.
- * 
- * Iyzico/Iyzipay is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- * 
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- * 
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
 
 namespace Iyzico\Iyzipay\Controller\Response;
 
@@ -27,10 +8,13 @@
 use Iyzico\Iyzipay\Controller\IyzicoBase\IyzicoRequest;
 use Magento\Checkout\Model\Type\Onepage;
 use Magento\Framework\Controller\ResultFactory;
+use Magento\Framework\App\CsrfAwareActionInterface;
+use Magento\Framework\App\RequestInterface;
+use Magento\Framework\App\Request\InvalidRequestException;
 
-class IyzicoCheckoutForm extends \Magento\Framework\App\Action\Action 
+class IyzicoCheckoutForm extends \Magento\Framework\App\Action\Action implements CsrfAwareActionInterface
 {
-    
+
     protected $_context;
     protected $_pageFactory;
     protected $_jsonEncoder;
@@ -50,6 +34,16 @@ class IyzicoCheckoutForm extends \Magento\Framework\App\Action\Action
     protected $_storeManager;
     protected $_helper;
 
+    public function createCsrfValidationException(RequestInterface $request): ?InvalidRequestException
+    {
+        return null;
+    }
+
+    public function validateForCsrf(RequestInterface $request): ?bool
+    {
+        return true;
+    }
+
     public function __construct(
         \Magento\Framework\App\Action\Context $context,
         \Magento\Framework\Json\EncoderInterface $encoder,
@@ -91,7 +85,7 @@ public function __construct(
     }
 
     public function execute()
-    {
+    {   
 
         $postData = $this->getRequest()->getPostValue();
         $resultRedirect = $this->_resultRedirect->create(ResultFactory::TYPE_REDIRECT);

Observer/DataAssignObserver.php

@@ -106,8 +106,6 @@ public function execute(Observer $observer)
                     $order->setSubTotalInclTax($iyzicoSubTotal);
                     $order->setGrandTotal($iyzicoGrandTotal);
                     $order->setBaseGrandTotal($iyzicoGrandTotal);
-                    $order->setState('processing');
-                    $order->setStatus('processing');
 
                     $payment = $order->getPayment();
                     $payment->setAmountOrdered($iyzicoGrandTotal);
@@ -122,6 +120,9 @@ public function execute(Observer $observer)
 
                 }
 
+                $order->setState('processing');
+                $order->setStatus('processing');
+
                 $historyComment = __('Payment Success').$paymentId;
                 $order->addStatusHistoryComment($historyComment);
             }