feat:bn获取交易对信息

@@ -264,6 +264,7 @@ class CmBroker
                     $infos[$info->symbol] = $info;
                 }
             }
+            $this->symbolInfos = $infos;
         }
         //定时10m刷新
         swoole_timer_after(1000 * 60 * 10, function () {