syntax = "proto3";
package tendermint.statesync;

import "tendermint/types/types.proto";

option go_package = "github.com/tendermint/tendermint/proto/tendermint/statesync";

message Message {
  oneof sum {
    SnapshotsRequest    snapshots_request  = 1;
    SnapshotsResponse   snapshots_response = 2;
    ChunkRequest        chunk_request      = 3;
    ChunkResponse       chunk_response     = 4;
    LightBlockRequest   light_block_request = 5;
    LightBlockResponse  light_block_response = 6;
  }
}

message SnapshotsRequest {}

message SnapshotsResponse {
  uint64 height   = 1;
  uint32 format   = 2;
  uint32 chunks   = 3;
  bytes  hash     = 4;
  bytes  metadata = 5;
}

message ChunkRequest {
  uint64 height = 1;
  uint32 format = 2;
  uint32 index  = 3;
}

message ChunkResponse {
  uint64 height  = 1;
  uint32 format  = 2;
  uint32 index   = 3;
  bytes  chunk   = 4;
  bool   missing = 5;
}

message LightBlockRequest {
  uint64 height = 1;
}

message LightBlockResponse {
  LightBlock light_block = 1; 
}