fix(sdk): fix unable to access undefined property on stdClass

src/Http/XMLHttp.php

@@ -38,7 +38,7 @@ public static function request(string $url, array $headers, mixed $body, bool $w
         return [
             $errno,
             $error,
-            TransactionResponse::fromXMLResponse(XMLResponse::parse("<response>$response</response>"))
+            XMLResponse::parse("<response>$response</response>")
         ];
     }
 

src/Sdk/Transaction.php

@@ -37,12 +37,15 @@ public function on(callable $success, callable $error): mixed
         /**
          * @var $errno int
          * @var $error string
-         * @var $response TransactionResponse
+         * @var $response mixed
          */
         [$errno, $errorMessage, $response] = $this->processRequest();
         if ($errno > 0) {
             return $error($errorMessage, $errno);
         }
+
+        $response = TransactionResponse::fromXMLResponse($response);
+
         if ($response->getStatus() !== 200) {
             return $error($response->getMessage(), $response->getStatus());
         }
@@ -58,12 +61,15 @@ public function handleTransaction(): TransactionResponse
         /**
          * @var $errno int
          * @var $errorMessage string
-         * @var $response TransactionResponse
+         * @var $response mixed
          */
         [$errno, $errorMessage, $response] = $this->processRequest();
         if ($errno > 0) {
             throw new TransactionException($errorMessage, $errno);
         }
+
+        $response = TransactionResponse::fromXMLResponse($response);
+
         if ($response->getStatus() !== 200) {
             throw new TransactionException($response->getMessage(), $response->getStatus());
         }