syntax = "proto3";

package raftlog.protobuf;

import "state.proto";
import "log.proto";

message RequestVoteCall {
  Header header = 1;
  LogPosition log_tail = 2;
}

message RequestVoteReply {
  Header header = 1;
  bool voted = 2;
}

message AppendEntriesCall {
  Header header = 1;
  uint64 committed_log_tail = 2;

  // NOTE: `LogSuffix`を使わない理由
  LogPosition head = 3;
  repeated LogEntry entries = 4;
}

message AppendEntriesReply {
  Header header = 1;
  LogPosition log_tail = 2;
  bool busy = 3;
}

message InstallSnapshotCast {
  Header header = 1;
  LogPrefix prefix = 2;
}

message Header {
  string sender = 1;
  string destination = 2;
  uint64 seq_no = 3;
  uint64 term = 4;
}