// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

syntax = "proto2";

option optimize_for = LITE_RUNTIME;

package metrics.structured;

import "structured_data.proto";

// These protos are used for storing key and event information for structured
// metrics. All changes should be backwards-compatible. This file is manually
// synced between chromium and platform2. Any changes should first be made to
// chromium and then copied to platform2.
//
// chromium path: components/metrics/structured/storage.proto
// platform2 path: metrics/structured/proto/storage.proto

// All information about the key for a single project.
message KeyProto {
  // The key itself.
  optional string key = 1;

  // When the key was last rotated, in days since the unix epoch.
  optional int64 last_rotation = 2;

  // The maximum number of days between rotations.
  optional int64 rotation_period = 3;
}

// Stores keys for all projects.
message KeyDataProto {
  // Maps the first 8 bytes of the MD5 hash of the project name to that
  // project's key.
  map<fixed64, KeyProto> keys = 1;
}

// On-device storage for events that have been recorded but not yet uploaded.
message EventsProto {
  // Events not associated with the UMA client_id.
  repeated StructuredEventProto non_uma_events = 1;

  // Events associated with the UMA client_id.
  repeated StructuredEventProto uma_events = 2;
}