// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// Protocol messages used to record the state of the model type store for USS.
// At the time of writing, the model type store uses leveldb, a schemaless
// key-value store. This means that the database's schema is mostly implicit.
// This descriptor isn't intended to fully describe the schema, just keep track
// of which major changes have been applied.

syntax = "proto2";

option optimize_for = LITE_RUNTIME;

package sync_pb;

message ModelTypeStoreSchemaDescriptor {
  optional int64 version_number = 1;
}