derrors

var (
	//cache errs
	ErrKeyExists   = fmt.Errorf("key is already exist")
	ErrKeyNotExist = fmt.Errorf("key not exist")
	//mqtt
	ErrMQTTRPCTimeout = fmt.Errorf("mqtt rpc call timeout")
	//websocket
	ErrWebsocket                = fmt.Errorf("the connect is not websocket")
	ErrWebsocketConnectionExist = fmt.Errorf("websocket connection is already exist")
	ErrWebsocketUpgrade         = fmt.Errorf("websocket upgrade error")
)