Fixed OAuth curl error: HTTP version

Author: Jakiboy

src/includes/Curl.php

@@ -44,7 +44,7 @@ final class Curl implements GatewayInterface
     public const MAXREDIRS      = CURLOPT_MAXREDIRS;
     public const ENCODING       = CURLOPT_ENCODING;
     public const USERAGENT      = CURLOPT_USERAGENT;
-    public const HTTP_VERSION   = CURLOPT_HTTP_VERSION;
+    // public const HTTP_VERSION   = CURLOPT_HTTP_VERSION;
 
     /**
      * @access private
@@ -428,7 +428,7 @@ public static function request(string $url, array $params = []) : array
         // Set options
         self::setHeader($handle, $header);
         self::setTimeout($handle, $timeout);
-        self::setOpt($handle, self::HTTP_VERSION, CURL_HTTP_VERSION_1_1);
+        // self::setOpt($handle, self::HTTP_VERSION, CURL_HTTP_VERSION_1_1);
 
         if ( $encoding ) {
             self::setEncoding($handle, $encoding);
@@ -443,6 +443,9 @@ public static function request(string $url, array $params = []) : array
             self::verifyPeer($handle, false);
         }
 
+        // Force HTTP/1.1 to avoid HTTP/2 stream protocol errors
+        self::setOpt($handle, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
+
         if ( $method == Client::POST ) {
             self::setPost($handle);
             self::setPostData($handle, $body);

src/lib/OAuth.php

@@ -162,13 +162,8 @@ private function refreshAccessToken() : void
 
         $response = curl_exec($ch);
         $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
-        $curlError = curl_error($ch);
         curl_close($ch);
 
-        if ( $curlError ) {
-            error_log("OAuth cURL Error: {$curlError}");
-        }
-
         if ( $httpCode === 200 && $response ) {
             $data = json_decode($response, true);
 
@@ -177,11 +172,12 @@ private function refreshAccessToken() : void
                 // Set expiration time with a 30-second buffer to match official SDK
                 $expiresIn = isset($data['expires_in']) ? (int)$data['expires_in'] : 3600;
                 $this->tokenExpiry = time() + $expiresIn - 30;
+            } else {
+                $this->clearToken();
             }
         } else {
             // Clear existing token on failure (official SDK pattern)
             $this->clearToken();
-            error_log("OAuth Error: Failed to get access token. HTTP Code: {$httpCode}");
         }
     }