syntax = "proto3";

package corestate.v2.sync;

option java_package = "com.corestate.v2.proto.sync";
option java_multiple_files = true;

// CRDT-based state for a file
message FileVersion {
  string path = 1;
  int64 version = 2; // Lamport timestamp
  int64 timestamp = 3; // Wall clock time
  string checksum = 4;
  string node_id = 5;
}

// Represents the sync state of a device
message SyncState {
  string node_id = 1;
  map<string, FileVersion> file_versions = 2; // LWW-Register Set
  repeated string deleted_files = 3; // OR-Set
}

service SyncService {
  // P2P sync between devices
  rpc SyncWithPeer(stream SyncState) returns (stream SyncState);
}