syntax = "proto3";
package cluster;

message GrainRequest {
  int32 method_index = 1;
  bytes message_data = 2;
  string message_type_name = 3;
}

message GrainResponse {
  bytes message_data = 1;
  string message_type_name = 2;
}

message GrainErrorResponse {
  string reason = 1;
  string message = 2;
  map<string, string> metadata = 3;
};