/errors/campaign_budget_error.proto

--- v20/errors/campaign_budget_error.proto  2025-06-04 18:55:28.000000000 +0000
+++ v21/errors/campaign_budget_error.proto  2025-08-05 14:28:35.000000000 +0000
@@ -1,102 +1,107 @@
 // Copyright 2025 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.

 syntax = "proto3";

-package google.ads.googleads.v20.errors;
+package google.ads.googleads.v21.errors;

-option csharp_namespace = "Google.Ads.GoogleAds.V20.Errors";
-option go_package = "google.golang.org/genproto/googleapis/ads/googleads/v20/errors;errors";
+option csharp_namespace = "Google.Ads.GoogleAds.V21.Errors";
+option go_package = "google.golang.org/genproto/googleapis/ads/googleads/v21/errors;errors";
 option java_multiple_files = true;
 option java_outer_classname = "CampaignBudgetErrorProto";
-option java_package = "com.google.ads.googleads.v20.errors";
+option java_package = "com.google.ads.googleads.v21.errors";
 option objc_class_prefix = "GAA";
-option php_namespace = "Google\\Ads\\GoogleAds\\V20\\Errors";
-option ruby_package = "Google::Ads::GoogleAds::V20::Errors";
+option php_namespace = "Google\\Ads\\GoogleAds\\V21\\Errors";
+option ruby_package = "Google::Ads::GoogleAds::V21::Errors";

 // Proto file describing campaign budget errors.

 // Container for enum describing possible campaign budget errors.
 message CampaignBudgetErrorEnum {
   // Enum describing possible campaign budget errors.
   enum CampaignBudgetError {
     // Enum unspecified.
     UNSPECIFIED = 0;

     // The received error code is not known in this version.
     UNKNOWN = 1;

     // The campaign budget cannot be shared.
     CAMPAIGN_BUDGET_CANNOT_BE_SHARED = 17;

     // The requested campaign budget no longer exists.
     CAMPAIGN_BUDGET_REMOVED = 2;

     // The campaign budget is associated with at least one campaign, and so the
     // campaign budget cannot be removed.
     CAMPAIGN_BUDGET_IN_USE = 3;

     // Customer is not on the allow-list for this campaign budget period.
     CAMPAIGN_BUDGET_PERIOD_NOT_AVAILABLE = 4;

     // This field is not mutable on implicitly shared campaign budgets
     CANNOT_MODIFY_FIELD_OF_IMPLICITLY_SHARED_CAMPAIGN_BUDGET = 6;

     // Cannot change explicitly shared campaign budgets back to implicitly
     // shared ones.
     CANNOT_UPDATE_CAMPAIGN_BUDGET_TO_IMPLICITLY_SHARED = 7;

     // An implicit campaign budget without a name cannot be changed to
     // explicitly shared campaign budget.
     CANNOT_UPDATE_CAMPAIGN_BUDGET_TO_EXPLICITLY_SHARED_WITHOUT_NAME = 8;

     // Cannot change an implicitly shared campaign budget to an explicitly
     // shared one.
     CANNOT_UPDATE_CAMPAIGN_BUDGET_TO_EXPLICITLY_SHARED = 9;

     // Only explicitly shared campaign budgets can be used with multiple
     // campaigns.
     CANNOT_USE_IMPLICITLY_SHARED_CAMPAIGN_BUDGET_WITH_MULTIPLE_CAMPAIGNS = 10;

     // A campaign budget with this name already exists.
     DUPLICATE_NAME = 11;

     // A money amount was not in the expected currency.
     MONEY_AMOUNT_IN_WRONG_CURRENCY = 12;

     // A money amount was less than the minimum CPC for currency.
     MONEY_AMOUNT_LESS_THAN_CURRENCY_MINIMUM_CPC = 13;

     // A money amount was greater than the maximum allowed.
     MONEY_AMOUNT_TOO_LARGE = 14;

     // A money amount was negative.
     NEGATIVE_MONEY_AMOUNT = 15;

     // A money amount was not a multiple of a minimum unit.
     NON_MULTIPLE_OF_MINIMUM_CURRENCY_UNIT = 16;

     // Total budget amount must be unset when BudgetPeriod is DAILY.
     TOTAL_BUDGET_AMOUNT_MUST_BE_UNSET_FOR_BUDGET_PERIOD_DAILY = 18;

     // The period of the budget is not allowed.
     INVALID_PERIOD = 19;

     // Cannot use accelerated delivery method on this budget.
     CANNOT_USE_ACCELERATED_DELIVERY_MODE = 20;

     // Budget amount must be unset when BudgetPeriod is CUSTOM.
     BUDGET_AMOUNT_MUST_BE_UNSET_FOR_CUSTOM_BUDGET_PERIOD = 21;
+
+    // Budget amount or total amount must be above this campaign's per-day
+    // minimum. See the error's details.budget_per_day_minimum_error_details
+    // field for more information.
+    BUDGET_BELOW_PER_DAY_MINIMUM = 22;
   }
 }