fix

api/controllers/OrderController.php

@@ -44,7 +44,7 @@ class OrderController extends BaseController
             $data['transfer_url'] = $val['url'];
             $data['step'] = $val['step'];
             $data['consensus'] = (false == $val['consensus']) ? 0 : 1;
-            $data['consensus_platform'] = $val['consensus_platform'];
+            $data['consensus_platform'] = isset($val['consensus_platform']) ? $val['consensus_platform'] : "";
             $model->load($data, '');
             $model->save();
         }