import "common_base.proto"; message CTransportAuth_Authenticate_Request { optional string auth_key = 1; } message CTransportAuth_Authenticate_Response { } message CTransportAuth_StartShutdown_Notification { } service TransportAuth { rpc Authenticate (.CTransportAuth_Authenticate_Request) returns (.CTransportAuth_Authenticate_Response); rpc NotifyStartShutdown (.CTransportAuth_StartShutdown_Notification) returns (.NoResponse); }