syntax = "proto2";
option optimize_for = LITE_RUNTIME;
package protos;

message CastMessage {
  enum ProtocolVersion { CASTV2_1_0 = 0; }
  required ProtocolVersion protocol_version = 1;
  required string source_id = 2;
  required string destination_id = 3;
  required string namespace = 4;
  enum PayloadType {
    STRING = 0;
    BINARY = 1;
  }
  required PayloadType payload_type = 5;
  optional string payload_utf8 = 6;
  optional bytes payload_binary = 7;
}