syntax = "proto3";

package waku.v2;

import "waku/v2/message.proto";

message Index {
  bytes digest = 1;
  double received_time = 2;
}

message PagingInfoQuery {
  uint32 page_size = 1; // TODO: See https://github.com/vacp2p/rfc/issues/326
  Index cursor = 2;
  Direction direction = 3;
}

enum Direction {
  DIRECTION_BACKWARD_UNSPECIFIED = 0;
  DIRECTION_FORWARD = 1;
}

message PagingInfoResponse {
  uint64 page_size = 1; // TODO: See https://github.com/vacp2p/rfc/issues/326
  Index cursor = 2;
  Direction direction = 3;
}

message HistoryQuery {
  repeated string topics = 1;
  optional PagingInfoQuery paging_info = 2;
  optional double start_time = 3;
  optional double end_time = 4;
}

message HistoryResponse {
  repeated WakuMessageProto messages = 1;
  PagingInfoResponse paging_info = 2;
}

message HistoryRPC {
  string request_id = 1;
  HistoryQuery query = 2;
  HistoryResponse response = 3;
}