feat:获取交易对失败

@@ -198,6 +198,7 @@ class ExBroker
     {
         $res = $this->api->instruments(["instType" => "SWAP"]);
         if ($res['code'] != '0') {
+            output('okx获取所有交易对信息失败');
             return [];
         }
         return $res['data'];