Pass json string to IPN class for decoding instead of decoding before passing

CRM/Core/Payment/Stripe.php

@@ -1131,9 +1131,8 @@ class CRM_Core_Payment_Stripe extends CRM_Core_Payment {
    * @throws \Stripe\Error\Api
    */
   public function handlePaymentNotification() {
-    $data_raw = file_get_contents("php://input");
-    $data = json_decode($data_raw);
-    $ipnClass = new CRM_Core_Payment_StripeIPN($data);
+    $dataRaw = file_get_contents("php://input");
+    $ipnClass = new CRM_Core_Payment_StripeIPN($dataRaw);
     if ($ipnClass->main()) {
       http_response_code(200);
     }

CRM/Core/Payment/StripeIPN.php

@@ -96,12 +96,14 @@ class CRM_Core_Payment_StripeIPN extends CRM_Core_Payment_BaseIPN {
   /**
    * CRM_Core_Payment_StripeIPN constructor.
    *
-   * @param \stdClass $ipnData
+   * @param string $ipnData
+   *   json encoded string
    * @param bool $verify
    */
   public function __construct($ipnData, $verify = TRUE) {
     $this->verify_event = $verify;
-    $this->setInputParameters($ipnData);
+    $data = json_decode($ipnData);
+    $this->setInputParameters($data);
     parent::__construct();
   }