syntax = "proto3";

package chord;

service ChordNode {
  rpc FindSuccessor (FindSuccessorRequest) returns (FindSuccessorResponse);
  rpc GetSuccessor (GetSuccessorRequest) returns (GetSuccessorResponse);
  rpc GetPredecessor (GetPredecessorRequest) returns (GetPredecessorResponse);
  rpc Notify (NotifyRequest) returns (NotifyResponse);
  rpc Ping (PingRequest) returns (PingResponse);
}

enum IpVersion {
  IPV4 = 0;
  IPV6 = 1;
}

message IpAddress {
  IpVersion version = 1;
  bytes address = 2;
}

message Node {
  uint64 id = 1;
  IpAddress ip = 2;
  int32 port = 3;
}

message FindSuccessorRequest {
  uint64 id = 1;
}

message FindSuccessorResponse {
  Node node = 2;
}

message GetSuccessorRequest {
}

message GetSuccessorResponse {
  Node node = 1;
}

message GetPredecessorRequest {
}

message GetPredecessorResponse {
  optional Node node = 1;
}

message NotifyRequest {
  Node node = 1;
}

message NotifyResponse {
}

message PingRequest {
}

message PingResponse {
}