feat:查询交易权限

@@ -139,6 +139,13 @@ class BinanceSpot
         $method = 'POST';
         return $this->requestAccount($method, $path, $param);
     }
+    //查询子账户Margin/Futures状态 (适用主账户)
+    public function  subAccountStatus($param)
+    {
+        $path = '/sapi/v1/sub-account/status';
+        $method = 'GET';
+        return $this->requestAccount($method, $path, $param);
+    }
 
     /*
      * ==================================