File: fedcm_clickthrough_rate_metadata.proto

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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

syntax = "proto3";

package webid;

// The message contains the FedCM clickthrough rate aggregated across all users
// for the page.
message FedCmClickthroughRateMetadata {
  // The number of FedCM sign-ins / number of page loads.
  float per_page_load_clickthrough_rate = 1;

  // The number of clients with FedCM sign-ins / number of clients shown.
  float per_client_clickthrough_rate = 2;

  // The number of FedCM sign-ins / number of FedCM impressions shown.
  float per_impression_clickthrough_rate = 3;

  // Likelihood of FedCM sign-ins. Value is between 0 and 1.
  float likely_to_signin = 4;

  // Likelihood of data being used to compute the above fields is insufficient.
  // e.g. Low data volume. Value is between 0 and 1.
  float likely_insufficient_data = 5;
}