diff --git a/api/wallet_transaction.php b/api/wallet_transaction.php
index afed15a..8690ba7 100644
--- a/api/wallet_transaction.php
+++ b/api/wallet_transaction.php
@@ -1,9 +1,9 @@
 <?php
+header('Content-Type: application/json');
 session_start();
-require_once 'db/config.php';
+require_once __DIR__ . '/../db/config.php';
 
 if (!isset($_SESSION['user_id'])) {
-    header('Content-Type: application/json');
     echo json_encode(['success' => false, 'error' => 'Unauthorized']);
     exit;
 }
@@ -13,7 +13,6 @@ $action = $_POST['action'] ?? '';
 $amount = (float)($_POST['amount'] ?? 0);
 
 if ($amount <= 0) {
-    header('Content-Type: application/json');
     echo json_encode(['success' => false, 'error' => 'Please enter a valid amount greater than zero.']);
     exit;
 }
@@ -55,7 +54,8 @@ try {
     }
 
 } catch (Exception $e) {
-    db()->rollBack();
-    header('Content-Type: application/json');
+    if (db()->inTransaction()) {
+        db()->rollBack();
+    }
     echo json_encode(['success' => false, 'error' => $e->getMessage()]);
 }
\ No newline at end of file