diff --git a/api/main.proto b/api/main.proto
index 5994237..86e9a93 100644
--- a/api/main.proto
+++ b/api/main.proto
@@ -47,7 +47,7 @@ service EveningDetectiveServer {
       security   : {};
       tags       : "Подтверждение участия";
       summary    : "Получить состояние участия";
-      description: "Возвращает команду, игру и текущее решение по персональному токену из письма. Авторизация JWT не требуется. Чтение не меняет статус участия. Токен передаётся в теле запроса. Недействительная ссылка и ошибки обработки возвращаются в поле error при HTTP 200.";
+      description: "Возвращает команду, игру и текущее решение по персональному токену из письма. Авторизация JWT не требуется. Чтение не меняет статус участия. Токен передаётся в теле запроса. Недействительная ссылка и ошибки обработки возвращаются стандартным gRPC status error.";
     };
   }
   rpc AnswerParticipation(AnswerParticipationReq) returns (ParticipationRsp) {
@@ -56,7 +56,7 @@ service EveningDetectiveServer {
       security   : {};
       tags       : "Подтверждение участия";
       summary    : "Подтвердить или отменить участие";
-      description: "Принимает окончательный ответ капитана: confirmed или cancelled. Авторизация JWT не требуется; доступ определяется персональным токеном. Первый ответ сохраняется, повтор того же ответа успешен, противоположный ответ отклоняется. Новый ответ принимается только до планового начала игры и пока игра имеет статус draft. Ошибки ссылки, значения answer, закрытого приёма или изменения решения возвращаются в поле error при HTTP 200; при уже принятом решении возвращается его текущее состояние.";
+      description: "Принимает окончательный ответ капитана: confirmed или cancelled. Авторизация JWT не требуется; доступ определяется персональным токеном. Первый ответ сохраняется, повтор того же ответа успешен, противоположный ответ отклоняется. Новый ответ принимается только до планового начала игры и пока игра имеет статус draft. Ошибки ссылки, значения answer, закрытого приёма или изменения решения возвращаются стандартным gRPC status error; при уже принятом решении возвращается его текущее состояние.";
     };
   }
   rpc Ping(PingReq) returns (PingRsp) {
@@ -1003,7 +1003,6 @@ message SignupReq {
 }
 
 message SignupRsp {
-  string error = 1;
 }
 
 message RefreshPasswordReq {
@@ -1011,7 +1010,6 @@ message RefreshPasswordReq {
 }
 
 message RefreshPasswordRsp {
-  string error = 1;
 }
 
 message LoginReq {
@@ -1020,9 +1018,8 @@ message LoginReq {
 }
 
 message LoginRsp {
-  string error        = 1;
-  string accessToken  = 2;
-  string refreshToken = 3;
+  string accessToken  = 1;
+  string refreshToken = 2;
 }
 
 message RefreshReq {
@@ -1030,9 +1027,8 @@ message RefreshReq {
 }
 
 message RefreshRsp {
-  string error        = 1;
-  string accessToken  = 2;
-  string refreshToken = 3;
+  string accessToken  = 1;
+  string refreshToken = 2;
 }
 
 // Пароль подтверждает, что удаляет аккаунт его владелец, а не обладатель
@@ -1042,7 +1038,6 @@ message RefreshRsp {
 message DeleteAccountReq {}
 
 message DeleteAccountRsp {
-  string error = 1;
 }
 
 // Документы раздаются по постоянным URL, на которые ссылается сервис при
@@ -1050,29 +1045,25 @@ message DeleteAccountRsp {
 message GetTermsReq {}
 
 message GetTermsRsp {
-  string error = 1;
-  string text  = 2;
+  string text  = 1;
 }
 
 message GetPrivacyReq {}
 
 message GetPrivacyRsp {
-  string error = 1;
-  string text  = 2;
+  string text  = 1;
 }
 
 message GetConsentReq {}
 
 message GetConsentRsp {
-  string error = 1;
-  string text  = 2;
+  string text  = 1;
 }
 
 message GetUsersReq {}
 
 message GetUsersRsp {
-  string        error = 1;
-  repeated User users = 2;
+  repeated User users = 1;
 }
 
 message User {
@@ -1089,15 +1080,13 @@ message GetUserByIDReq {
 }
 
 message GetUserByIDRsp {
-  string error = 1;
-  User   user  = 2;
+  User   user  = 1;
 }
 
 message GetMeReq {}
 
 message GetMeRsp {
-  string error = 1;
-  User   user  = 2;
+  User   user  = 1;
 }
 
 message ChangeUserPasswordReq {
@@ -1113,7 +1102,6 @@ message AddUserRoleReq {
 }
 
 message AddUserRoleRsp {
-  string error = 1;
 }
 
 message DeleteUserRoleReq {
@@ -1122,14 +1110,12 @@ message DeleteUserRoleReq {
 }
 
 message DeleteUserRoleRsp {
-  string error = 1;
 }
 
 message GetPermissionsReq {}
 
 message GetPermissionsRsp {
-  string          error       = 1;
-  repeated string permissions = 2;
+  repeated string permissions = 1;
 }
 
 message UploadFileReq {
@@ -1138,11 +1124,10 @@ message UploadFileReq {
 }
 
 message UploadFileRsp {
-  string error    = 1;
-  string filename = 2;
+  string filename = 1;
   // Тип загруженного файла: image | pdf | audio | video (определяется сервером по
   // содержимому). Удобен редактору для предзаполнения file_type улики.
-  string file_type = 3 [json_name = "file_type"];
+  string file_type = 2 [json_name = "file_type"];
 }
 
 message DownloadFileReq {
@@ -1154,22 +1139,19 @@ message AddScenarioReq {
 }
 
 message AddScenarioRsp {
-  string error = 1;
-  int32  ID    = 2;
+  int32  ID    = 1;
 }
 
 message GetMyScenariosReq {}
 
 message GetMyScenariosRsp {
-  string            error     = 1;
-  repeated Scenario scenarios = 2;
+  repeated Scenario scenarios = 1;
 }
 
 message GetScenariosCatalogReq {}
 
 message GetScenariosCatalogRsp {
-  string            error     = 1;
-  repeated Scenario scenarios = 2;
+  repeated Scenario scenarios = 1;
 }
 
 message GetScenarioReq {
@@ -1177,8 +1159,7 @@ message GetScenarioReq {
 }
 
 message GetScenarioRsp {
-  string   error    = 1;
-  Scenario scenario = 2;
+  Scenario scenario = 1;
 }
 
 message Scenario {
@@ -1289,7 +1270,6 @@ message UpdateScenarioReq {
 }
 
 message UpdateScenarioRsp {
-  string error = 1;
 }
 
 message PublicScenarioReq {
@@ -1297,7 +1277,6 @@ message PublicScenarioReq {
 }
 
 message PublicScenarioRsp {
-  string error = 1;
 }
 
 message DraftScenarioReq {
@@ -1305,7 +1284,6 @@ message DraftScenarioReq {
 }
 
 message DraftScenarioRsp {
-  string error = 1;
 }
 
 message DeleteScenarioReq {
@@ -1313,7 +1291,6 @@ message DeleteScenarioReq {
 }
 
 message DeleteScenarioRsp {
-  string error = 1;
 }
 
 message AddScenarioPlaceReq {
@@ -1322,7 +1299,6 @@ message AddScenarioPlaceReq {
 }
 
 message AddScenarioPlaceRsp {
-  string error = 1;
 }
 
 message UpdateScenarioPlaceReq {
@@ -1332,7 +1308,6 @@ message UpdateScenarioPlaceReq {
 }
 
 message UpdateScenarioPlaceRsp {
-  string error = 1;
 }
 
 message DeleteScenarioPlaceReq {
@@ -1341,7 +1316,6 @@ message DeleteScenarioPlaceReq {
 }
 
 message DeleteScenarioPlaceRsp {
-  string error = 1;
 }
 
 message UpdateScenarioConclusionReq {
@@ -1350,7 +1324,6 @@ message UpdateScenarioConclusionReq {
 }
 
 message UpdateScenarioConclusionRsp {
-  string error = 1;
 }
 
 message UpdateScenarioIntroReq {
@@ -1359,7 +1332,6 @@ message UpdateScenarioIntroReq {
 }
 
 message UpdateScenarioIntroRsp {
-  string error = 1;
 }
 
 message AddScenarioQuestionReq {
@@ -1368,7 +1340,6 @@ message AddScenarioQuestionReq {
 }
 
 message AddScenarioQuestionRsp {
-  string error = 1;
 }
 
 message UpdateScenarioQuestionReq {
@@ -1378,7 +1349,6 @@ message UpdateScenarioQuestionReq {
 }
 
 message UpdateScenarioQuestionRsp {
-  string error = 1;
 }
 
 message DeleteScenarioQuestionReq {
@@ -1387,7 +1357,6 @@ message DeleteScenarioQuestionReq {
 }
 
 message DeleteScenarioQuestionRsp {
-  string error = 1;
 }
 
 message DownloadScenarioArchiveReq {
@@ -1395,8 +1364,7 @@ message DownloadScenarioArchiveReq {
 }
 
 message UploadScenarioArchiveRsp {
-  string error = 1;
-  int32  ID    = 2;
+  int32  ID    = 1;
 }
 
 message AddGameReq {
@@ -1409,15 +1377,13 @@ message AddGameReq {
 }
 
 message AddGameRsp {
-  string error = 1;
-  int32  ID    = 2;
+  int32  ID    = 1;
 }
 
 message GetGamesReq {}
 
 message GetGamesRsp {
-  string        error = 1;
-  repeated Game games = 2;
+  repeated Game games = 1;
 }
 
 message Game {
@@ -1493,9 +1459,8 @@ message ScreenState {
 message CreateScreenSessionReq {}
 
 message CreateScreenSessionRsp {
-  string error        = 1;
-  string screenID    = 2;
-  string access_token = 3;
+  string screenID    = 1;
+  string access_token = 2;
 }
 
 message GetScreenStateReq {
@@ -1504,8 +1469,7 @@ message GetScreenStateReq {
 }
 
 message GetScreenStateRsp {
-  string      error = 1;
-  ScreenState state = 2;
+  ScreenState state = 1;
 }
 
 message GetGameScreensReq {
@@ -1513,8 +1477,7 @@ message GetGameScreensReq {
 }
 
 message GetGameScreensRsp {
-  string               error   = 1;
-  repeated ScreenState screens = 2;
+  repeated ScreenState screens = 1;
 }
 
 message BindScreenReq {
@@ -1524,8 +1487,7 @@ message BindScreenReq {
 }
 
 message BindScreenRsp {
-  string      error = 1;
-  ScreenState state = 2;
+  ScreenState state = 1;
 }
 
 message UnbindScreenReq {
@@ -1533,7 +1495,6 @@ message UnbindScreenReq {
 }
 
 message UnbindScreenRsp {
-  string error = 1;
 }
 
 message SetScreenSoundReq {
@@ -1542,7 +1503,6 @@ message SetScreenSoundReq {
 }
 
 message SetScreenSoundRsp {
-  string error = 1;
 }
 
 message MapItem {
@@ -1561,8 +1521,7 @@ message GetGameMapReq {
 }
 
 message GetGameMapRsp {
-  string           error = 1;
-  repeated MapItem items = 2;
+  repeated MapItem items = 1;
 }
 
 message UpdateGameMapItemReq {
@@ -1574,7 +1533,7 @@ message UpdateGameMapItemReq {
   bool   hidden = 6;
 }
 
-message UpdateGameMapItemRsp { string error = 1; }
+message UpdateGameMapItemRsp {}
 
 message SetScreenModeReq {
   int32      gameID = 1;
@@ -1582,7 +1541,6 @@ message SetScreenModeReq {
 }
 
 message SetScreenModeRsp {
-  string error = 1;
 }
 
 message SetScreenTimerReq {
@@ -1592,7 +1550,6 @@ message SetScreenTimerReq {
 }
 
 message SetScreenTimerRsp {
-  string error = 1;
 }
 
 message SendScreenCommandReq {
@@ -1603,7 +1560,6 @@ message SendScreenCommandReq {
 }
 
 message SendScreenCommandRsp {
-  string error = 1;
 }
 
 message GetScreenResultsReq {
@@ -1612,9 +1568,8 @@ message GetScreenResultsReq {
 }
 
 message GetScreenResultsRsp {
-  string                   error     = 1;
-  repeated ResultsQuestion questions = 2;
-  repeated TeamResult      teams     = 3;
+  repeated ResultsQuestion questions = 1;
+  repeated TeamResult      teams     = 2;
 }
 
 message GetParticipationReq {
@@ -1630,21 +1585,19 @@ message AnswerParticipationReq {
 }
 
 message ParticipationRsp {
-  // Пустая строка при успехе; иначе сообщение об ошибке для пользователя.
-  string error = 1;
   // Название команды. Данные доступны только по действительному токену.
-  string team_name = 2;
+  string team_name = 1;
   // Название игры.
-  string game_name = 3;
+  string game_name = 2;
   // Плановое начало игры, UTC (RFC 3339 в JSON).
-  google.protobuf.Timestamp start_at = 4;
+  google.protobuf.Timestamp start_at = 3;
   // Заявленное число участников команды.
-  int32 participants_count = 5;
+  int32 participants_count = 4;
   // pending — ожидает ответа, confirmed — подтверждено, cancelled — отменено.
-  string status = 6;
+  string status = 5;
   // Новые ответы закрыты: наступило плановое начало или игра вышла из draft.
   // Изменение уже принятого решения запрещено независимо от этого поля.
-  bool closed = 7;
+  bool closed = 6;
 }
 
 message Team {
@@ -1671,8 +1624,7 @@ message GetGameReq {
 }
 
 message GetGameRsp {
-  string error = 1;
-  Game   game  = 2;
+  Game   game  = 1;
 }
 
 message GetGameAnswersReq {
@@ -1680,9 +1632,8 @@ message GetGameAnswersReq {
 }
 
 message GetGameAnswersRsp {
-  string               error     = 1;
-  repeated Question    questions = 2;
-  repeated TeamAnswers teams     = 3;
+  repeated Question    questions = 1;
+  repeated TeamAnswers teams     = 2;
 }
 
 message GetGameResultsReq {
@@ -1711,9 +1662,8 @@ message TeamResult {
 }
 
 message GetGameResultsRsp {
-  string                   error     = 1;
-  repeated ResultsQuestion questions = 2;
-  repeated TeamResult      teams     = 3;
+  repeated ResultsQuestion questions = 1;
+  repeated TeamResult      teams     = 2;
 }
 
 message GameReview {
@@ -1737,8 +1687,7 @@ message CreateGameReviewReq {
 }
 
 message CreateGameReviewRsp {
-  string     error  = 1;
-  GameReview review = 2;
+  GameReview review = 1;
 }
 
 message GetGameReviewsReq {
@@ -1752,10 +1701,9 @@ message GetScenarioReviewsReq {
 message GetReviewsForModerationReq {}
 
 message GetGameReviewsRsp {
-  string              error          = 1;
-  double              average_rating = 2;
-  int32               reviews_count  = 3;
-  repeated GameReview reviews        = 4;
+  double              average_rating = 1;
+  int32               reviews_count  = 2;
+  repeated GameReview reviews        = 3;
 }
 
 message ModerateGameReviewReq {
@@ -1764,8 +1712,7 @@ message ModerateGameReviewReq {
 }
 
 message ModerateGameReviewRsp {
-  string     error  = 1;
-  GameReview review = 2;
+  GameReview review = 1;
 }
 
 message UpdateGameReq {
@@ -1779,7 +1726,6 @@ message UpdateGameReq {
 }
 
 message UpdateGameRsp {
-  string error = 1;
 }
 
 message StartGameReq {
@@ -1787,7 +1733,6 @@ message StartGameReq {
 }
 
 message StartGameRsp {
-  string error = 1;
 }
 
 message PauseGameReq {
@@ -1795,7 +1740,6 @@ message PauseGameReq {
 }
 
 message PauseGameRsp {
-  string error = 1;
 }
 
 message PlayGameReq {
@@ -1803,7 +1747,6 @@ message PlayGameReq {
 }
 
 message PlayGameRsp {
-  string error = 1;
 }
 
 message FinishGameReq {
@@ -1811,7 +1754,6 @@ message FinishGameReq {
 }
 
 message FinishGameRsp {
-  string error = 1;
 }
 
 message ResetGameReq {
@@ -1819,7 +1761,6 @@ message ResetGameReq {
 }
 
 message ResetGameRsp {
-  string error = 1;
 }
 
 message DeleteGameReq {
@@ -1827,7 +1768,6 @@ message DeleteGameReq {
 }
 
 message DeleteGameRsp {
-  string error = 1;
 }
 
 message AddTeamReq {
@@ -1837,9 +1777,8 @@ message AddTeamReq {
 }
 
 message AddTeamRsp {
-  string error    = 1;
-  int32  ID       = 2;
-  string password = 3;
+  int32  ID       = 1;
+  string password = 2;
 }
 
 message UpdateTeamReq {
@@ -1848,7 +1787,6 @@ message UpdateTeamReq {
 }
 
 message UpdateTeamRsp {
-  string error = 1;
 }
 
 message DeleteTeamReq {
@@ -1856,7 +1794,6 @@ message DeleteTeamReq {
 }
 
 message DeleteTeamRsp {
-  string error = 1;
 }
 
 message GiveTeamApplicationsReq {
@@ -1865,7 +1802,6 @@ message GiveTeamApplicationsReq {
 }
 
 message GiveTeamApplicationsRsp {
-  string error = 1;
 }
 
 message GetTeamStoryReq {
@@ -1874,10 +1810,9 @@ message GetTeamStoryReq {
 }
 
 message GetTeamStoryRsp {
-  string              error   = 1;
-  Story               story   = 2;
-  Game                game    = 3;
-  repeated TeamAction actions = 4;
+  Story               story   = 1;
+  Game                game    = 2;
+  repeated TeamAction actions = 3;
 }
 
 message TeamAction {
@@ -1892,7 +1827,6 @@ message AddTeamActionReq {
 }
 
 message AddTeamActionRsp {
-  string error = 1;
 }
 
 message DeleteLastTeamActionReq {
@@ -1900,7 +1834,6 @@ message DeleteLastTeamActionReq {
 }
 
 message DeleteLastTeamActionRsp {
-  string error = 1;
 }
 
 message GetTeamAnswersReq {
@@ -1909,8 +1842,7 @@ message GetTeamAnswersReq {
 }
 
 message GetTeamAnswersRsp {
-  string          error   = 1;
-  repeated Answer answers = 2;
+  repeated Answer answers = 1;
 }
 
 message SubmitTeamAnswersReq {
@@ -1920,7 +1852,6 @@ message SubmitTeamAnswersReq {
 }
 
 message SubmitTeamAnswersRsp {
-  string error = 1;
 }
 
 message SetTeamAnswerScoreReq {
@@ -1931,7 +1862,6 @@ message SetTeamAnswerScoreReq {
 }
 
 message SetTeamAnswerScoreRsp {
-  string error = 1;
 }
 
 message UpdateScenarioBackgroundReq {
@@ -1940,7 +1870,6 @@ message UpdateScenarioBackgroundReq {
 }
 
 message UpdateScenarioBackgroundRsp {
-  string error = 1;
 }
 
 message IssueGameTicketsReq {
@@ -1949,8 +1878,7 @@ message IssueGameTicketsReq {
 }
 
 message IssueGameTicketsRsp {
-  string          error   = 1;
-  repeated Ticket tickets = 2;
+  repeated Ticket tickets = 1;
 }
 
 message Ticket {
@@ -1963,8 +1891,7 @@ message GetTicketReq {
 }
 
 message GetTicketRsp {
-  string     error  = 1;
-  TicketPage ticket = 2;
+  TicketPage ticket = 1;
 }
 
 message AcceptTicketReq {
@@ -1972,8 +1899,7 @@ message AcceptTicketReq {
 }
 
 message AcceptTicketRsp {
-  string     error  = 1;
-  TicketPage ticket = 2;
+  TicketPage ticket = 1;
 }
 
 message TicketPage {
diff --git a/cmd/evening_detective_server/main.swagger.json b/cmd/evening_detective_server/main.swagger.json
index bd257cd..7ddee40 100644
--- a/cmd/evening_detective_server/main.swagger.json
+++ b/cmd/evening_detective_server/main.swagger.json
@@ -1235,7 +1235,7 @@
     "/api/participation/answer": {
       "post": {
         "summary": "Подтвердить или отменить участие",
-        "description": "Принимает окончательный ответ капитана: confirmed или cancelled. Авторизация JWT не требуется; доступ определяется персональным токеном. Первый ответ сохраняется, повтор того же ответа успешен, противоположный ответ отклоняется. Новый ответ принимается только до планового начала игры и пока игра имеет статус draft. Ошибки ссылки, значения answer, закрытого приёма или изменения решения возвращаются в поле error при HTTP 200; при уже принятом решении возвращается его текущее состояние.",
+        "description": "Принимает окончательный ответ капитана: confirmed или cancelled. Авторизация JWT не требуется; доступ определяется персональным токеном. Первый ответ сохраняется, повтор того же ответа успешен, противоположный ответ отклоняется. Новый ответ принимается только до планового начала игры и пока игра имеет статус draft. Ошибки ссылки, значения answer, закрытого приёма или изменения решения возвращаются стандартным gRPC status error; при уже принятом решении возвращается его текущее состояние.",
         "operationId": "EveningDetectiveServer_AnswerParticipation",
         "responses": {
           "200": {
@@ -1270,7 +1270,7 @@
     "/api/participation/get": {
       "post": {
         "summary": "Получить состояние участия",
-        "description": "Возвращает команду, игру и текущее решение по персональному токену из письма. Авторизация JWT не требуется. Чтение не меняет статус участия. Токен передаётся в теле запроса. Недействительная ссылка и ошибки обработки возвращаются в поле error при HTTP 200.",
+        "description": "Возвращает команду, игру и текущее решение по персональному токену из письма. Авторизация JWT не требуется. Чтение не меняет статус участия. Токен передаётся в теле запроса. Недействительная ссылка и ошибки обработки возвращаются стандартным gRPC status error.",
         "operationId": "EveningDetectiveServer_GetParticipation",
         "responses": {
           "200": {
@@ -3376,9 +3376,6 @@
     "evening_detective_serverAcceptTicketRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "ticket": {
           "$ref": "#/definitions/evening_detective_serverTicketPage"
         }
@@ -3412,9 +3409,6 @@
     "evening_detective_serverAddGameRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "ID": {
           "type": "integer",
           "format": "int32"
@@ -3422,20 +3416,10 @@
       }
     },
     "evening_detective_serverAddScenarioPlaceRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverAddScenarioQuestionRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverAddScenarioReq": {
       "type": "object",
@@ -3448,9 +3432,6 @@
     "evening_detective_serverAddScenarioRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "ID": {
           "type": "integer",
           "format": "int32"
@@ -3458,12 +3439,7 @@
       }
     },
     "evening_detective_serverAddTeamActionRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverAddTeamReq": {
       "type": "object",
@@ -3483,9 +3459,6 @@
     "evening_detective_serverAddTeamRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "ID": {
           "type": "integer",
           "format": "int32"
@@ -3496,12 +3469,7 @@
       }
     },
     "evening_detective_serverAddUserRoleRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverAnswer": {
       "type": "object",
@@ -3565,9 +3533,6 @@
     "evening_detective_serverBindScreenRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "state": {
           "$ref": "#/definitions/evening_detective_serverScreenState"
         }
@@ -3590,9 +3555,6 @@
     "evening_detective_serverCreateGameReviewRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "review": {
           "$ref": "#/definitions/evening_detective_serverGameReview"
         }
@@ -3604,9 +3566,6 @@
     "evening_detective_serverCreateScreenSessionRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "screenID": {
           "type": "string"
         },
@@ -3616,68 +3575,28 @@
       }
     },
     "evening_detective_serverDeleteAccountRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverDeleteGameRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverDeleteLastTeamActionRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverDeleteScenarioPlaceRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverDeleteScenarioQuestionRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverDeleteScenarioRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverDeleteTeamRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverDeleteUserRoleRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverDoor": {
       "type": "object",
@@ -3698,12 +3617,7 @@
       }
     },
     "evening_detective_serverDraftScenarioRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverEchoRsp": {
       "type": "object",
@@ -3714,12 +3628,7 @@
       }
     },
     "evening_detective_serverFinishGameRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverGame": {
       "type": "object",
@@ -3807,9 +3716,6 @@
     "evening_detective_serverGetConsentRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "text": {
           "type": "string"
         }
@@ -3818,9 +3724,6 @@
     "evening_detective_serverGetGameAnswersRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "questions": {
           "type": "array",
           "items": {
@@ -3840,9 +3743,6 @@
     "evening_detective_serverGetGameMapRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "items": {
           "type": "array",
           "items": {
@@ -3855,9 +3755,6 @@
     "evening_detective_serverGetGameResultsRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "questions": {
           "type": "array",
           "items": {
@@ -3877,9 +3774,6 @@
     "evening_detective_serverGetGameReviewsRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "averageRating": {
           "type": "number",
           "format": "double"
@@ -3900,9 +3794,6 @@
     "evening_detective_serverGetGameRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "game": {
           "$ref": "#/definitions/evening_detective_serverGame"
         }
@@ -3911,9 +3802,6 @@
     "evening_detective_serverGetGameScreensRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "screens": {
           "type": "array",
           "items": {
@@ -3926,9 +3814,6 @@
     "evening_detective_serverGetGamesRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "games": {
           "type": "array",
           "items": {
@@ -3941,9 +3826,6 @@
     "evening_detective_serverGetMeRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "user": {
           "$ref": "#/definitions/evening_detective_serverUser"
         }
@@ -3952,9 +3834,6 @@
     "evening_detective_serverGetMyScenariosRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "scenarios": {
           "type": "array",
           "items": {
@@ -3976,9 +3855,6 @@
     "evening_detective_serverGetPermissionsRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "permissions": {
           "type": "array",
           "items": {
@@ -3990,9 +3866,6 @@
     "evening_detective_serverGetPrivacyRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "text": {
           "type": "string"
         }
@@ -4001,9 +3874,6 @@
     "evening_detective_serverGetScenarioRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "scenario": {
           "$ref": "#/definitions/evening_detective_serverScenario"
         }
@@ -4012,9 +3882,6 @@
     "evening_detective_serverGetScenariosCatalogRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "scenarios": {
           "type": "array",
           "items": {
@@ -4038,9 +3905,6 @@
     "evening_detective_serverGetScreenResultsRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "questions": {
           "type": "array",
           "items": {
@@ -4071,9 +3935,6 @@
     "evening_detective_serverGetScreenStateRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "state": {
           "$ref": "#/definitions/evening_detective_serverScreenState"
         }
@@ -4082,9 +3943,6 @@
     "evening_detective_serverGetTeamAnswersRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "answers": {
           "type": "array",
           "items": {
@@ -4097,9 +3955,6 @@
     "evening_detective_serverGetTeamStoryRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "story": {
           "$ref": "#/definitions/evening_detective_serverStory"
         },
@@ -4118,9 +3973,6 @@
     "evening_detective_serverGetTermsRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "text": {
           "type": "string"
         }
@@ -4129,9 +3981,6 @@
     "evening_detective_serverGetTicketRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "ticket": {
           "$ref": "#/definitions/evening_detective_serverTicketPage"
         }
@@ -4140,9 +3989,6 @@
     "evening_detective_serverGetUserByIDRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "user": {
           "$ref": "#/definitions/evening_detective_serverUser"
         }
@@ -4151,9 +3997,6 @@
     "evening_detective_serverGetUsersRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "users": {
           "type": "array",
           "items": {
@@ -4164,12 +4007,7 @@
       }
     },
     "evening_detective_serverGiveTeamApplicationsRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverIntroduction": {
       "type": "object",
@@ -4185,9 +4023,6 @@
     "evening_detective_serverIssueGameTicketsRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "tickets": {
           "type": "array",
           "items": {
@@ -4219,9 +4054,6 @@
     "evening_detective_serverLoginRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "accessToken": {
           "type": "string"
         },
@@ -4265,9 +4097,6 @@
     "evening_detective_serverModerateGameReviewRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "review": {
           "$ref": "#/definitions/evening_detective_serverGameReview"
         }
@@ -4276,10 +4105,6 @@
     "evening_detective_serverParticipationRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string",
-          "description": "Пустая строка при успехе; иначе сообщение об ошибке для пользователя."
-        },
         "teamName": {
           "type": "string",
           "description": "Название команды. Данные доступны только по действительному токену."
@@ -4309,12 +4134,7 @@
       }
     },
     "evening_detective_serverPauseGameRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverPingRsp": {
       "type": "object"
@@ -4361,20 +4181,10 @@
       }
     },
     "evening_detective_serverPlayGameRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverPublicScenarioRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverQuestion": {
       "type": "object",
@@ -4403,12 +4213,7 @@
       }
     },
     "evening_detective_serverRefreshPasswordRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverRefreshReq": {
       "type": "object",
@@ -4421,9 +4226,6 @@
     "evening_detective_serverRefreshRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "accessToken": {
           "type": "string"
         },
@@ -4433,12 +4235,7 @@
       }
     },
     "evening_detective_serverResetGameRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverResultsQuestion": {
       "type": "object",
@@ -4611,44 +4408,19 @@
       "default": "SCREEN_TIMER_STATE_UNSPECIFIED"
     },
     "evening_detective_serverSendScreenCommandRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverSetScreenModeRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverSetScreenSoundRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverSetScreenTimerRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverSetTeamAnswerScoreRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverSignupReq": {
       "type": "object",
@@ -4668,20 +4440,10 @@
       }
     },
     "evening_detective_serverSignupRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverStartGameRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverStory": {
       "type": "object",
@@ -4713,12 +4475,7 @@
       }
     },
     "evening_detective_serverSubmitTeamAnswersRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverTeam": {
       "type": "object",
@@ -4875,84 +4632,34 @@
       }
     },
     "evening_detective_serverUnbindScreenRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverUpdateGameMapItemRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverUpdateGameRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverUpdateScenarioBackgroundRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverUpdateScenarioConclusionRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverUpdateScenarioIntroRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverUpdateScenarioPlaceRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverUpdateScenarioQuestionRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverUpdateScenarioRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverUpdateTeamRsp": {
-      "type": "object",
-      "properties": {
-        "error": {
-          "type": "string"
-        }
-      }
+      "type": "object"
     },
     "evening_detective_serverUploadFileReq": {
       "type": "object",
@@ -4969,9 +4676,6 @@
     "evening_detective_serverUploadFileRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "filename": {
           "type": "string"
         },
@@ -4984,9 +4688,6 @@
     "evening_detective_serverUploadScenarioArchiveRsp": {
       "type": "object",
       "properties": {
-        "error": {
-          "type": "string"
-        },
         "ID": {
           "type": "integer",
           "format": "int32"
diff --git a/internal/app/file_service_test.go b/internal/app/file_service_test.go
index 6e637b0..e5e9317 100644
--- a/internal/app/file_service_test.go
+++ b/internal/app/file_service_test.go
@@ -131,9 +131,6 @@ func TestUploadFileSuccess(t *testing.T) {
 	if rsp.FileType != "pdf" {
 		t.Errorf("FileType = %q, want pdf", rsp.FileType)
 	}
-	if rsp.Error != "" {
-		t.Errorf("Error = %q, want пусто", rsp.Error)
-	}
 }
 
 // mockServerTransportStream — заглушка для grpc.SetHeader в юнит-тестах.
diff --git a/internal/app/legal_docs.go b/internal/app/legal_docs.go
index 2904c63..9da8eaa 100644
--- a/internal/app/legal_docs.go
+++ b/internal/app/legal_docs.go
@@ -5,6 +5,8 @@ import (
 
 	"evening_detective_server/docs"
 	proto "evening_detective_server/proto"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
 )
 
 // GetTerms возвращает текст Пользовательского соглашения (постоянный URL
@@ -12,7 +14,7 @@ import (
 func (s *server) GetTerms(_ context.Context, _ *proto.GetTermsReq) (*proto.GetTermsRsp, error) {
 	text, err := docs.FS.ReadFile("TERMS.md")
 	if err != nil {
-		return &proto.GetTermsRsp{Error: "Не удалось получить документ"}, nil
+		return nil, status.Error(codes.Internal, "не удалось получить документ")
 	}
 	return &proto.GetTermsRsp{Text: string(text)}, nil
 }
@@ -22,7 +24,7 @@ func (s *server) GetTerms(_ context.Context, _ *proto.GetTermsReq) (*proto.GetTe
 func (s *server) GetPrivacy(_ context.Context, _ *proto.GetPrivacyReq) (*proto.GetPrivacyRsp, error) {
 	text, err := docs.FS.ReadFile("PRIVACY.md")
 	if err != nil {
-		return &proto.GetPrivacyRsp{Error: "Не удалось получить документ"}, nil
+		return nil, status.Error(codes.Internal, "не удалось получить документ")
 	}
 	return &proto.GetPrivacyRsp{Text: string(text)}, nil
 }
@@ -32,7 +34,7 @@ func (s *server) GetPrivacy(_ context.Context, _ *proto.GetPrivacyReq) (*proto.G
 func (s *server) GetConsent(_ context.Context, _ *proto.GetConsentReq) (*proto.GetConsentRsp, error) {
 	text, err := docs.FS.ReadFile("CONSENT.md")
 	if err != nil {
-		return &proto.GetConsentRsp{Error: "Не удалось получить документ"}, nil
+		return nil, status.Error(codes.Internal, "не удалось получить документ")
 	}
 	return &proto.GetConsentRsp{Text: string(text)}, nil
 }
diff --git a/internal/app/legal_docs_test.go b/internal/app/legal_docs_test.go
index 84a3c84..ac3fe1e 100644
--- a/internal/app/legal_docs_test.go
+++ b/internal/app/legal_docs_test.go
@@ -13,39 +13,39 @@ func TestGetLegalDocs(t *testing.T) {
 
 	tests := []struct {
 		name     string
-		call     func() (text, errText string)
+		call     func() string
 		wantPart string
 	}{
 		{
 			name: "GetTerms отдаёт Пользовательское соглашение",
-			call: func() (string, string) {
+			call: func() string {
 				rsp, err := s.GetTerms(context.Background(), &proto.GetTermsReq{})
 				if err != nil {
 					t.Fatalf("GetTerms error: %v", err)
 				}
-				return rsp.Text, rsp.Error
+				return rsp.Text
 			},
 			wantPart: "СОГЛАШЕНИЕ",
 		},
 		{
 			name: "GetPrivacy отдаёт Политику конфиденциальности",
-			call: func() (string, string) {
+			call: func() string {
 				rsp, err := s.GetPrivacy(context.Background(), &proto.GetPrivacyReq{})
 				if err != nil {
 					t.Fatalf("GetPrivacy error: %v", err)
 				}
-				return rsp.Text, rsp.Error
+				return rsp.Text
 			},
 			wantPart: "КОНФИДЕНЦИАЛЬНОСТИ",
 		},
 		{
 			name: "GetConsent отдаёт текст согласия на обработку ПДн",
-			call: func() (string, string) {
+			call: func() string {
 				rsp, err := s.GetConsent(context.Background(), &proto.GetConsentReq{})
 				if err != nil {
 					t.Fatalf("GetConsent error: %v", err)
 				}
-				return rsp.Text, rsp.Error
+				return rsp.Text
 			},
 			wantPart: "СОГЛАСИЕ",
 		},
@@ -53,10 +53,7 @@ func TestGetLegalDocs(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			text, errText := tt.call()
-			if errText != "" {
-				t.Fatalf("ожидался успех, получена ошибка: %s", errText)
-			}
+			text := tt.call()
 			if !strings.Contains(text, tt.wantPart) {
 				t.Errorf("текст документа не содержит %q", tt.wantPart)
 			}
diff --git a/internal/app/participation.go b/internal/app/participation.go
index 0f83314..531d858 100644
--- a/internal/app/participation.go
+++ b/internal/app/participation.go
@@ -6,7 +6,9 @@ import (
 	"evening_detective_server/internal/services/participation_service"
 	"evening_detective_server/proto"
 	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/metadata"
+	"google.golang.org/grpc/status"
 	"google.golang.org/protobuf/types/known/timestamppb"
 )
 
@@ -23,36 +25,40 @@ func mapParticipationResponse(p *participation_service.Participation) *proto.Par
 	return result
 }
 
-func participationError(err error) string {
-	if errors.Is(err, participation_service.ErrParticipationLink) || errors.Is(err, participation_service.ErrParticipationFinal) || errors.Is(err, participation_service.ErrParticipationClosed) {
-		return err.Error()
+func participationErrorStatus(err error, internalMessage string) error {
+	switch {
+	case errors.Is(err, participation_service.ErrParticipationLink):
+		return status.Error(codes.NotFound, err.Error())
+	case errors.Is(err, participation_service.ErrInvalidAnswer):
+		return status.Error(codes.InvalidArgument, err.Error())
+	case errors.Is(err, participation_service.ErrParticipationFinal), errors.Is(err, participation_service.ErrParticipationClosed):
+		return status.Error(codes.FailedPrecondition, err.Error())
+	default:
+		return status.Error(codes.Internal, internalMessage)
 	}
-	return "Не удалось обработать ответ. Попробуйте позже."
 }
 func (s *server) GetParticipation(ctx context.Context, req *proto.GetParticipationReq) (*proto.ParticipationRsp, error) {
 	_ = grpc.SetHeader(ctx, metadata.Pairs("Cache-Control", "no-store"))
 	if req == nil {
-		return &proto.ParticipationRsp{Error: participationError(participation_service.ErrParticipationLink)}, nil
+		return nil, participationErrorStatus(participation_service.ErrParticipationLink, "не удалось получить данные об участии")
 	}
 	p, err := s.participationService.GetParticipation(ctx, req.Token)
-	result := mapParticipationResponse(p)
 	if err != nil {
-		result.Error = participationError(err)
+		return nil, participationErrorStatus(err, "не удалось получить данные об участии")
 	}
-	return result, nil
+	return mapParticipationResponse(p), nil
 }
 func (s *server) AnswerParticipation(ctx context.Context, req *proto.AnswerParticipationReq) (*proto.ParticipationRsp, error) {
 	_ = grpc.SetHeader(ctx, metadata.Pairs("Cache-Control", "no-store"))
 	if req == nil {
-		return &proto.ParticipationRsp{Error: participationError(participation_service.ErrParticipationLink)}, nil
+		return nil, participationErrorStatus(participation_service.ErrParticipationLink, "не удалось сохранить ответ")
 	}
 	if req.Answer != "confirmed" && req.Answer != "cancelled" {
-		return &proto.ParticipationRsp{Error: participation_service.ErrInvalidAnswer.Error()}, nil
+		return nil, participationErrorStatus(participation_service.ErrInvalidAnswer, "не удалось сохранить ответ")
 	}
 	p, err := s.participationService.AnswerParticipation(ctx, req.Token, req.Answer)
-	result := mapParticipationResponse(p)
 	if err != nil {
-		result.Error = participationError(err)
+		return nil, participationErrorStatus(err, "не удалось сохранить ответ")
 	}
-	return result, nil
+	return mapParticipationResponse(p), nil
 }
diff --git a/internal/app/participation_test.go b/internal/app/participation_test.go
index 3b7e1ea..ed5a5a4 100644
--- a/internal/app/participation_test.go
+++ b/internal/app/participation_test.go
@@ -6,24 +6,29 @@ import (
 	"testing"
 
 	"evening_detective_server/internal/services/participation_service"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
 )
 
-func TestParticipationError(t *testing.T) {
+func TestParticipationErrorStatus(t *testing.T) {
 	for _, tc := range []struct {
 		name string
 		err  error
+		code codes.Code
 		want string
 	}{
-		{"invalid link", participation_service.ErrParticipationLink, "Ссылка недействительна"},
-		{"closed", participation_service.ErrParticipationClosed, "Приём ответов закрыт"},
-		{"final", participation_service.ErrParticipationFinal, "Решение уже принято и не может быть изменено"},
-		{"internal", errors.New("private database detail"), "Не удалось обработать ответ. Попробуйте позже."},
+		{"invalid link", participation_service.ErrParticipationLink, codes.NotFound, "Ссылка недействительна"},
+		{"invalid answer", participation_service.ErrInvalidAnswer, codes.InvalidArgument, "Выберите подтверждение или отмену участия"},
+		{"closed", participation_service.ErrParticipationClosed, codes.FailedPrecondition, "Приём ответов закрыт"},
+		{"final", participation_service.ErrParticipationFinal, codes.FailedPrecondition, "Решение уже принято и не может быть изменено"},
+		{"internal", errors.New("private database detail"), codes.Internal, "participation failed"},
 	} {
 		t.Run(tc.name, func(t *testing.T) {
-			if got := participationError(tc.err); got != tc.want {
-				t.Fatalf("message=%q, want %q", got, tc.want)
+			got := participationErrorStatus(tc.err, "participation failed")
+			if status.Code(got) != tc.code || status.Convert(got).Message() != tc.want {
+				t.Fatalf("status=%v, want %s %q", got, tc.code, tc.want)
 			}
-			if strings.Contains(participationError(tc.err), "private database detail") {
+			if tc.code == codes.Internal && strings.Contains(status.Convert(got).Message(), "private database detail") {
 				t.Fatal("private error exposed")
 			}
 		})
diff --git a/internal/app/payload_errors_test.go b/internal/app/payload_errors_test.go
new file mode 100644
index 0000000..74ed4b4
--- /dev/null
+++ b/internal/app/payload_errors_test.go
@@ -0,0 +1,69 @@
+package app
+
+import (
+	"context"
+	"strings"
+	"testing"
+
+	"evening_detective_server/internal/services/participation_service"
+	"evening_detective_server/internal/services/ticket_service"
+	"evening_detective_server/proto"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+)
+
+func assertGRPCStatus(t *testing.T, err error, wantCode codes.Code, wantMessage string) {
+	t.Helper()
+	if status.Code(err) != wantCode {
+		t.Fatalf("status code = %v, want %v", status.Code(err), wantCode)
+	}
+	if status.Convert(err).Message() != wantMessage {
+		t.Fatalf("status message = %q, want %q", status.Convert(err).Message(), wantMessage)
+	}
+}
+
+func TestGetTicketNotFoundUsesGRPCStatus(t *testing.T) {
+	rsp, err := (&server{}).GetTicket(context.Background(), nil)
+	if rsp != nil {
+		t.Fatalf("GetTicket response = %v, want nil", rsp)
+	}
+	assertGRPCStatus(t, err, codes.NotFound, ticket_service.ErrTicketNotFound.Error())
+}
+
+func TestAcceptTicketNilRequestUsesGRPCStatus(t *testing.T) {
+	rsp, err := (&server{}).AcceptTicket(ctxWithClaims("organizer"), nil)
+	if rsp != nil {
+		t.Fatalf("AcceptTicket response = %v, want nil", rsp)
+	}
+	assertGRPCStatus(t, err, codes.NotFound, ticket_service.ErrTicketNotFound.Error())
+}
+
+func TestGetParticipationInvalidRequestUsesGRPCStatus(t *testing.T) {
+	rsp, err := (&server{}).GetParticipation(context.Background(), nil)
+	if rsp != nil {
+		t.Fatalf("GetParticipation response = %v, want nil", rsp)
+	}
+	assertGRPCStatus(t, err, codes.NotFound, participation_service.ErrParticipationLink.Error())
+}
+
+func TestAnswerParticipationInvalidAnswerUsesGRPCStatus(t *testing.T) {
+	rsp, err := (&server{}).AnswerParticipation(context.Background(), &proto.AnswerParticipationReq{Answer: "unknown"})
+	if rsp != nil {
+		t.Fatalf("AnswerParticipation response = %v, want nil", rsp)
+	}
+	assertGRPCStatus(t, err, codes.InvalidArgument, participation_service.ErrInvalidAnswer.Error())
+}
+
+func TestResponseMessagesDoNotExposePayloadError(t *testing.T) {
+	for i := 0; i < proto.File_main_proto.Messages().Len(); i++ {
+		message := proto.File_main_proto.Messages().Get(i)
+		if !strings.HasSuffix(string(message.Name()), "Rsp") {
+			continue
+		}
+		for j := 0; j < message.Fields().Len(); j++ {
+			if message.Fields().Get(j).Name() == "error" {
+				t.Errorf("%s still exposes payload error field", message.FullName())
+			}
+		}
+	}
+}
diff --git a/internal/app/tickets.go b/internal/app/tickets.go
index 5536182..d454076 100644
--- a/internal/app/tickets.go
+++ b/internal/app/tickets.go
@@ -17,11 +17,11 @@ import (
 func (s *server) GetTicket(ctx context.Context, req *proto.GetTicketReq) (*proto.GetTicketRsp, error) {
 	_ = grpc.SetHeader(ctx, metadata.Pairs("Cache-Control", "no-store"))
 	if req == nil {
-		return &proto.GetTicketRsp{Error: ticket_service.ErrTicketNotFound.Error()}, nil
+		return nil, ticketErrorStatus(ticket_service.ErrTicketNotFound, "не удалось получить билет")
 	}
 	page, err := s.ticketService.Get(ctx, req.Token)
 	if err != nil {
-		return &proto.GetTicketRsp{Error: ticket_service.ErrTicketNotFound.Error()}, nil
+		return nil, ticketErrorStatus(err, "не удалось получить билет")
 	}
 
 	result := &proto.TicketPage{
@@ -49,7 +49,7 @@ func (s *server) AcceptTicket(ctx context.Context, req *proto.AcceptTicketReq) (
 		return nil, status.Error(codes.PermissionDenied, "permission denied")
 	}
 	if req == nil {
-		return &proto.AcceptTicketRsp{Error: ticket_service.ErrTicketNotFound.Error()}, nil
+		return nil, ticketErrorStatus(ticket_service.ErrTicketNotFound, "не удалось принять билет")
 	}
 	page, err := s.ticketService.Accept(ctx, req.Token, claims.UserID)
 	if err != nil {
diff --git a/proto/main.pb.go b/proto/main.pb.go
index c1e5184..096963c 100644
--- a/proto/main.pb.go
+++ b/proto/main.pb.go
@@ -456,7 +456,6 @@ func (x *SignupReq) GetAcceptPrivacy() bool {
 
 type SignupRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -491,13 +490,6 @@ func (*SignupRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{5}
 }
 
-func (x *SignupRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type RefreshPasswordReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	Email         string                 `protobuf:"bytes,1,opt,name=email,proto3" json:"email,omitempty"`
@@ -544,7 +536,6 @@ func (x *RefreshPasswordReq) GetEmail() string {
 
 type RefreshPasswordRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -579,13 +570,6 @@ func (*RefreshPasswordRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{7}
 }
 
-func (x *RefreshPasswordRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type LoginReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	Email         string                 `protobuf:"bytes,1,opt,name=email,proto3" json:"email,omitempty"`
@@ -640,9 +624,8 @@ func (x *LoginReq) GetPassword() string {
 
 type LoginRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	AccessToken   string                 `protobuf:"bytes,2,opt,name=accessToken,proto3" json:"accessToken,omitempty"`
-	RefreshToken  string                 `protobuf:"bytes,3,opt,name=refreshToken,proto3" json:"refreshToken,omitempty"`
+	AccessToken   string                 `protobuf:"bytes,1,opt,name=accessToken,proto3" json:"accessToken,omitempty"`
+	RefreshToken  string                 `protobuf:"bytes,2,opt,name=refreshToken,proto3" json:"refreshToken,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -677,13 +660,6 @@ func (*LoginRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{9}
 }
 
-func (x *LoginRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *LoginRsp) GetAccessToken() string {
 	if x != nil {
 		return x.AccessToken
@@ -744,9 +720,8 @@ func (x *RefreshReq) GetRefreshToken() string {
 
 type RefreshRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	AccessToken   string                 `protobuf:"bytes,2,opt,name=accessToken,proto3" json:"accessToken,omitempty"`
-	RefreshToken  string                 `protobuf:"bytes,3,opt,name=refreshToken,proto3" json:"refreshToken,omitempty"`
+	AccessToken   string                 `protobuf:"bytes,1,opt,name=accessToken,proto3" json:"accessToken,omitempty"`
+	RefreshToken  string                 `protobuf:"bytes,2,opt,name=refreshToken,proto3" json:"refreshToken,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -781,13 +756,6 @@ func (*RefreshRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{11}
 }
 
-func (x *RefreshRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *RefreshRsp) GetAccessToken() string {
 	if x != nil {
 		return x.AccessToken
@@ -844,7 +812,6 @@ func (*DeleteAccountReq) Descriptor() ([]byte, []int) {
 
 type DeleteAccountRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -879,13 +846,6 @@ func (*DeleteAccountRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{13}
 }
 
-func (x *DeleteAccountRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 // Документы раздаются по постоянным URL, на которые ссылается сервис при
 // фиксации акцептов соглашений (user_agreements) и форма регистрации.
 type GetTermsReq struct {
@@ -926,8 +886,7 @@ func (*GetTermsReq) Descriptor() ([]byte, []int) {
 
 type GetTermsRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	Text          string                 `protobuf:"bytes,2,opt,name=text,proto3" json:"text,omitempty"`
+	Text          string                 `protobuf:"bytes,1,opt,name=text,proto3" json:"text,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -962,13 +921,6 @@ func (*GetTermsRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{15}
 }
 
-func (x *GetTermsRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *GetTermsRsp) GetText() string {
 	if x != nil {
 		return x.Text
@@ -1014,8 +966,7 @@ func (*GetPrivacyReq) Descriptor() ([]byte, []int) {
 
 type GetPrivacyRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	Text          string                 `protobuf:"bytes,2,opt,name=text,proto3" json:"text,omitempty"`
+	Text          string                 `protobuf:"bytes,1,opt,name=text,proto3" json:"text,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -1050,13 +1001,6 @@ func (*GetPrivacyRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{17}
 }
 
-func (x *GetPrivacyRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *GetPrivacyRsp) GetText() string {
 	if x != nil {
 		return x.Text
@@ -1102,8 +1046,7 @@ func (*GetConsentReq) Descriptor() ([]byte, []int) {
 
 type GetConsentRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	Text          string                 `protobuf:"bytes,2,opt,name=text,proto3" json:"text,omitempty"`
+	Text          string                 `protobuf:"bytes,1,opt,name=text,proto3" json:"text,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -1138,13 +1081,6 @@ func (*GetConsentRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{19}
 }
 
-func (x *GetConsentRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *GetConsentRsp) GetText() string {
 	if x != nil {
 		return x.Text
@@ -1190,8 +1126,7 @@ func (*GetUsersReq) Descriptor() ([]byte, []int) {
 
 type GetUsersRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	Users         []*User                `protobuf:"bytes,2,rep,name=users,proto3" json:"users,omitempty"`
+	Users         []*User                `protobuf:"bytes,1,rep,name=users,proto3" json:"users,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -1226,13 +1161,6 @@ func (*GetUsersRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{21}
 }
 
-func (x *GetUsersRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *GetUsersRsp) GetUsers() []*User {
 	if x != nil {
 		return x.Users
@@ -1370,8 +1298,7 @@ func (x *GetUserByIDReq) GetID() int32 {
 
 type GetUserByIDRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	User          *User                  `protobuf:"bytes,2,opt,name=user,proto3" json:"user,omitempty"`
+	User          *User                  `protobuf:"bytes,1,opt,name=user,proto3" json:"user,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -1406,13 +1333,6 @@ func (*GetUserByIDRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{24}
 }
 
-func (x *GetUserByIDRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *GetUserByIDRsp) GetUser() *User {
 	if x != nil {
 		return x.User
@@ -1458,8 +1378,7 @@ func (*GetMeReq) Descriptor() ([]byte, []int) {
 
 type GetMeRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	User          *User                  `protobuf:"bytes,2,opt,name=user,proto3" json:"user,omitempty"`
+	User          *User                  `protobuf:"bytes,1,opt,name=user,proto3" json:"user,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -1494,13 +1413,6 @@ func (*GetMeRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{26}
 }
 
-func (x *GetMeRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *GetMeRsp) GetUser() *User {
 	if x != nil {
 		return x.User
@@ -1650,7 +1562,6 @@ func (x *AddUserRoleReq) GetRole() string {
 
 type AddUserRoleRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -1685,13 +1596,6 @@ func (*AddUserRoleRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{30}
 }
 
-func (x *AddUserRoleRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type DeleteUserRoleReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	ID            int32                  `protobuf:"varint,1,opt,name=ID,proto3" json:"ID,omitempty"`
@@ -1746,7 +1650,6 @@ func (x *DeleteUserRoleReq) GetRole() string {
 
 type DeleteUserRoleRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -1781,13 +1684,6 @@ func (*DeleteUserRoleRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{32}
 }
 
-func (x *DeleteUserRoleRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type GetPermissionsReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	unknownFields protoimpl.UnknownFields
@@ -1826,8 +1722,7 @@ func (*GetPermissionsReq) Descriptor() ([]byte, []int) {
 
 type GetPermissionsRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	Permissions   []string               `protobuf:"bytes,2,rep,name=permissions,proto3" json:"permissions,omitempty"`
+	Permissions   []string               `protobuf:"bytes,1,rep,name=permissions,proto3" json:"permissions,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -1862,13 +1757,6 @@ func (*GetPermissionsRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{34}
 }
 
-func (x *GetPermissionsRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *GetPermissionsRsp) GetPermissions() []string {
 	if x != nil {
 		return x.Permissions
@@ -1930,11 +1818,10 @@ func (x *UploadFileReq) GetData() []byte {
 
 type UploadFileRsp struct {
 	state    protoimpl.MessageState `protogen:"open.v1"`
-	Error    string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	Filename string                 `protobuf:"bytes,2,opt,name=filename,proto3" json:"filename,omitempty"`
+	Filename string                 `protobuf:"bytes,1,opt,name=filename,proto3" json:"filename,omitempty"`
 	// Тип загруженного файла: image | pdf | audio | video (определяется сервером по
 	// содержимому). Удобен редактору для предзаполнения file_type улики.
-	FileType      string `protobuf:"bytes,3,opt,name=file_type,proto3" json:"file_type,omitempty"`
+	FileType      string `protobuf:"bytes,2,opt,name=file_type,proto3" json:"file_type,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -1969,13 +1856,6 @@ func (*UploadFileRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{36}
 }
 
-func (x *UploadFileRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *UploadFileRsp) GetFilename() string {
 	if x != nil {
 		return x.Filename
@@ -2080,8 +1960,7 @@ func (x *AddScenarioReq) GetName() string {
 
 type AddScenarioRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	ID            int32                  `protobuf:"varint,2,opt,name=ID,proto3" json:"ID,omitempty"`
+	ID            int32                  `protobuf:"varint,1,opt,name=ID,proto3" json:"ID,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -2116,13 +1995,6 @@ func (*AddScenarioRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{39}
 }
 
-func (x *AddScenarioRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *AddScenarioRsp) GetID() int32 {
 	if x != nil {
 		return x.ID
@@ -2168,8 +2040,7 @@ func (*GetMyScenariosReq) Descriptor() ([]byte, []int) {
 
 type GetMyScenariosRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	Scenarios     []*Scenario            `protobuf:"bytes,2,rep,name=scenarios,proto3" json:"scenarios,omitempty"`
+	Scenarios     []*Scenario            `protobuf:"bytes,1,rep,name=scenarios,proto3" json:"scenarios,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -2204,13 +2075,6 @@ func (*GetMyScenariosRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{41}
 }
 
-func (x *GetMyScenariosRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *GetMyScenariosRsp) GetScenarios() []*Scenario {
 	if x != nil {
 		return x.Scenarios
@@ -2256,8 +2120,7 @@ func (*GetScenariosCatalogReq) Descriptor() ([]byte, []int) {
 
 type GetScenariosCatalogRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	Scenarios     []*Scenario            `protobuf:"bytes,2,rep,name=scenarios,proto3" json:"scenarios,omitempty"`
+	Scenarios     []*Scenario            `protobuf:"bytes,1,rep,name=scenarios,proto3" json:"scenarios,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -2292,13 +2155,6 @@ func (*GetScenariosCatalogRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{43}
 }
 
-func (x *GetScenariosCatalogRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *GetScenariosCatalogRsp) GetScenarios() []*Scenario {
 	if x != nil {
 		return x.Scenarios
@@ -2352,8 +2208,7 @@ func (x *GetScenarioReq) GetID() int32 {
 
 type GetScenarioRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	Scenario      *Scenario              `protobuf:"bytes,2,opt,name=scenario,proto3" json:"scenario,omitempty"`
+	Scenario      *Scenario              `protobuf:"bytes,1,opt,name=scenario,proto3" json:"scenario,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -2388,13 +2243,6 @@ func (*GetScenarioRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{45}
 }
 
-func (x *GetScenarioRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *GetScenarioRsp) GetScenario() *Scenario {
 	if x != nil {
 		return x.Scenario
@@ -3287,7 +3135,6 @@ func (x *UpdateScenarioReq) GetImage() string {
 
 type UpdateScenarioRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -3322,13 +3169,6 @@ func (*UpdateScenarioRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{59}
 }
 
-func (x *UpdateScenarioRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type PublicScenarioReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	ID            int32                  `protobuf:"varint,1,opt,name=ID,proto3" json:"ID,omitempty"`
@@ -3375,7 +3215,6 @@ func (x *PublicScenarioReq) GetID() int32 {
 
 type PublicScenarioRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -3410,13 +3249,6 @@ func (*PublicScenarioRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{61}
 }
 
-func (x *PublicScenarioRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type DraftScenarioReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	ID            int32                  `protobuf:"varint,1,opt,name=ID,proto3" json:"ID,omitempty"`
@@ -3463,7 +3295,6 @@ func (x *DraftScenarioReq) GetID() int32 {
 
 type DraftScenarioRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -3498,13 +3329,6 @@ func (*DraftScenarioRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{63}
 }
 
-func (x *DraftScenarioRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type DeleteScenarioReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	ID            int32                  `protobuf:"varint,1,opt,name=ID,proto3" json:"ID,omitempty"`
@@ -3551,7 +3375,6 @@ func (x *DeleteScenarioReq) GetID() int32 {
 
 type DeleteScenarioRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -3586,13 +3409,6 @@ func (*DeleteScenarioRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{65}
 }
 
-func (x *DeleteScenarioRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type AddScenarioPlaceReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	ID            int32                  `protobuf:"varint,1,opt,name=ID,proto3" json:"ID,omitempty"`
@@ -3647,7 +3463,6 @@ func (x *AddScenarioPlaceReq) GetPlace() *Place {
 
 type AddScenarioPlaceRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -3682,13 +3497,6 @@ func (*AddScenarioPlaceRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{67}
 }
 
-func (x *AddScenarioPlaceRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type UpdateScenarioPlaceReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	ID            int32                  `protobuf:"varint,1,opt,name=ID,proto3" json:"ID,omitempty"`
@@ -3751,7 +3559,6 @@ func (x *UpdateScenarioPlaceReq) GetPlace() *Place {
 
 type UpdateScenarioPlaceRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -3786,13 +3593,6 @@ func (*UpdateScenarioPlaceRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{69}
 }
 
-func (x *UpdateScenarioPlaceRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type DeleteScenarioPlaceReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	ID            int32                  `protobuf:"varint,1,opt,name=ID,proto3" json:"ID,omitempty"`
@@ -3847,7 +3647,6 @@ func (x *DeleteScenarioPlaceReq) GetCode() string {
 
 type DeleteScenarioPlaceRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -3882,13 +3681,6 @@ func (*DeleteScenarioPlaceRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{71}
 }
 
-func (x *DeleteScenarioPlaceRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type UpdateScenarioConclusionReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	ID            int32                  `protobuf:"varint,1,opt,name=ID,proto3" json:"ID,omitempty"`
@@ -3943,7 +3735,6 @@ func (x *UpdateScenarioConclusionReq) GetConclusion() *Conclusion {
 
 type UpdateScenarioConclusionRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -3978,13 +3769,6 @@ func (*UpdateScenarioConclusionRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{73}
 }
 
-func (x *UpdateScenarioConclusionRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type UpdateScenarioIntroReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	ID            int32                  `protobuf:"varint,1,opt,name=ID,proto3" json:"ID,omitempty"`
@@ -4039,7 +3823,6 @@ func (x *UpdateScenarioIntroReq) GetIntroduction() *Introduction {
 
 type UpdateScenarioIntroRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -4074,13 +3857,6 @@ func (*UpdateScenarioIntroRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{75}
 }
 
-func (x *UpdateScenarioIntroRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type AddScenarioQuestionReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	ID            int32                  `protobuf:"varint,1,opt,name=ID,proto3" json:"ID,omitempty"`
@@ -4135,7 +3911,6 @@ func (x *AddScenarioQuestionReq) GetQuestion() *Question {
 
 type AddScenarioQuestionRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -4170,13 +3945,6 @@ func (*AddScenarioQuestionRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{77}
 }
 
-func (x *AddScenarioQuestionRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type UpdateScenarioQuestionReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	ID            int32                  `protobuf:"varint,1,opt,name=ID,proto3" json:"ID,omitempty"`
@@ -4239,7 +4007,6 @@ func (x *UpdateScenarioQuestionReq) GetQuestion() *Question {
 
 type UpdateScenarioQuestionRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -4274,13 +4041,6 @@ func (*UpdateScenarioQuestionRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{79}
 }
 
-func (x *UpdateScenarioQuestionRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type DeleteScenarioQuestionReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	ID            int32                  `protobuf:"varint,1,opt,name=ID,proto3" json:"ID,omitempty"`
@@ -4335,7 +4095,6 @@ func (x *DeleteScenarioQuestionReq) GetCode() string {
 
 type DeleteScenarioQuestionRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -4370,13 +4129,6 @@ func (*DeleteScenarioQuestionRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{81}
 }
 
-func (x *DeleteScenarioQuestionRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type DownloadScenarioArchiveReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	ID            int32                  `protobuf:"varint,1,opt,name=ID,proto3" json:"ID,omitempty"`
@@ -4423,8 +4175,7 @@ func (x *DownloadScenarioArchiveReq) GetID() int32 {
 
 type UploadScenarioArchiveRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	ID            int32                  `protobuf:"varint,2,opt,name=ID,proto3" json:"ID,omitempty"`
+	ID            int32                  `protobuf:"varint,1,opt,name=ID,proto3" json:"ID,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -4459,13 +4210,6 @@ func (*UploadScenarioArchiveRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{83}
 }
 
-func (x *UploadScenarioArchiveRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *UploadScenarioArchiveRsp) GetID() int32 {
 	if x != nil {
 		return x.ID
@@ -4559,8 +4303,7 @@ func (x *AddGameReq) GetLocation() string {
 
 type AddGameRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	ID            int32                  `protobuf:"varint,2,opt,name=ID,proto3" json:"ID,omitempty"`
+	ID            int32                  `protobuf:"varint,1,opt,name=ID,proto3" json:"ID,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -4595,13 +4338,6 @@ func (*AddGameRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{85}
 }
 
-func (x *AddGameRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *AddGameRsp) GetID() int32 {
 	if x != nil {
 		return x.ID
@@ -4647,8 +4383,7 @@ func (*GetGamesReq) Descriptor() ([]byte, []int) {
 
 type GetGamesRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	Games         []*Game                `protobuf:"bytes,2,rep,name=games,proto3" json:"games,omitempty"`
+	Games         []*Game                `protobuf:"bytes,1,rep,name=games,proto3" json:"games,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -4683,13 +4418,6 @@ func (*GetGamesRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{87}
 }
 
-func (x *GetGamesRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *GetGamesRsp) GetGames() []*Game {
 	if x != nil {
 		return x.Games
@@ -5047,9 +4775,8 @@ func (*CreateScreenSessionReq) Descriptor() ([]byte, []int) {
 
 type CreateScreenSessionRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	ScreenID      string                 `protobuf:"bytes,2,opt,name=screenID,proto3" json:"screenID,omitempty"`
-	AccessToken   string                 `protobuf:"bytes,3,opt,name=access_token,json=accessToken,proto3" json:"access_token,omitempty"`
+	ScreenID      string                 `protobuf:"bytes,1,opt,name=screenID,proto3" json:"screenID,omitempty"`
+	AccessToken   string                 `protobuf:"bytes,2,opt,name=access_token,json=accessToken,proto3" json:"access_token,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -5084,13 +4811,6 @@ func (*CreateScreenSessionRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{91}
 }
 
-func (x *CreateScreenSessionRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *CreateScreenSessionRsp) GetScreenID() string {
 	if x != nil {
 		return x.ScreenID
@@ -5159,8 +4879,7 @@ func (x *GetScreenStateReq) GetAccessToken() string {
 
 type GetScreenStateRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	State         *ScreenState           `protobuf:"bytes,2,opt,name=state,proto3" json:"state,omitempty"`
+	State         *ScreenState           `protobuf:"bytes,1,opt,name=state,proto3" json:"state,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -5195,13 +4914,6 @@ func (*GetScreenStateRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{93}
 }
 
-func (x *GetScreenStateRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *GetScreenStateRsp) GetState() *ScreenState {
 	if x != nil {
 		return x.State
@@ -5255,8 +4967,7 @@ func (x *GetGameScreensReq) GetGameID() int32 {
 
 type GetGameScreensRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	Screens       []*ScreenState         `protobuf:"bytes,2,rep,name=screens,proto3" json:"screens,omitempty"`
+	Screens       []*ScreenState         `protobuf:"bytes,1,rep,name=screens,proto3" json:"screens,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -5291,13 +5002,6 @@ func (*GetGameScreensRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{95}
 }
 
-func (x *GetGameScreensRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *GetGameScreensRsp) GetScreens() []*ScreenState {
 	if x != nil {
 		return x.Screens
@@ -5367,8 +5071,7 @@ func (x *BindScreenReq) GetGameID() int32 {
 
 type BindScreenRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	State         *ScreenState           `protobuf:"bytes,2,opt,name=state,proto3" json:"state,omitempty"`
+	State         *ScreenState           `protobuf:"bytes,1,opt,name=state,proto3" json:"state,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -5403,13 +5106,6 @@ func (*BindScreenRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{97}
 }
 
-func (x *BindScreenRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *BindScreenRsp) GetState() *ScreenState {
 	if x != nil {
 		return x.State
@@ -5463,7 +5159,6 @@ func (x *UnbindScreenReq) GetScreenID() string {
 
 type UnbindScreenRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -5498,13 +5193,6 @@ func (*UnbindScreenRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{99}
 }
 
-func (x *UnbindScreenRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type SetScreenSoundReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	ScreenID      string                 `protobuf:"bytes,1,opt,name=screenID,proto3" json:"screenID,omitempty"`
@@ -5559,7 +5247,6 @@ func (x *SetScreenSoundReq) GetSoundEnabled() bool {
 
 type SetScreenSoundRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -5594,13 +5281,6 @@ func (*SetScreenSoundRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{101}
 }
 
-func (x *SetScreenSoundRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type MapItem struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	Kind          string                 `protobuf:"bytes,1,opt,name=kind,proto3" json:"kind,omitempty"`
@@ -5747,8 +5427,7 @@ func (x *GetGameMapReq) GetGameID() int32 {
 
 type GetGameMapRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	Items         []*MapItem             `protobuf:"bytes,2,rep,name=items,proto3" json:"items,omitempty"`
+	Items         []*MapItem             `protobuf:"bytes,1,rep,name=items,proto3" json:"items,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -5783,13 +5462,6 @@ func (*GetGameMapRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{104}
 }
 
-func (x *GetGameMapRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *GetGameMapRsp) GetItems() []*MapItem {
 	if x != nil {
 		return x.Items
@@ -5883,7 +5555,6 @@ func (x *UpdateGameMapItemReq) GetHidden() bool {
 
 type UpdateGameMapItemRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -5918,13 +5589,6 @@ func (*UpdateGameMapItemRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{106}
 }
 
-func (x *UpdateGameMapItemRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type SetScreenModeReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	GameID        int32                  `protobuf:"varint,1,opt,name=gameID,proto3" json:"gameID,omitempty"`
@@ -5979,7 +5643,6 @@ func (x *SetScreenModeReq) GetMode() ScreenMode {
 
 type SetScreenModeRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -6014,13 +5677,6 @@ func (*SetScreenModeRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{108}
 }
 
-func (x *SetScreenModeRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type SetScreenTimerReq struct {
 	state           protoimpl.MessageState `protogen:"open.v1"`
 	GameID          int32                  `protobuf:"varint,1,opt,name=gameID,proto3" json:"gameID,omitempty"`
@@ -6083,7 +5739,6 @@ func (x *SetScreenTimerReq) GetLabel() string {
 
 type SetScreenTimerRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -6118,13 +5773,6 @@ func (*SetScreenTimerRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{110}
 }
 
-func (x *SetScreenTimerRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type SendScreenCommandReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	GameID        int32                  `protobuf:"varint,1,opt,name=gameID,proto3" json:"gameID,omitempty"`
@@ -6195,7 +5843,6 @@ func (x *SendScreenCommandReq) GetVolume() int32 {
 
 type SendScreenCommandRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -6230,13 +5877,6 @@ func (*SendScreenCommandRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{112}
 }
 
-func (x *SendScreenCommandRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type GetScreenResultsReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	ScreenID      string                 `protobuf:"bytes,1,opt,name=screenID,proto3" json:"screenID,omitempty"`
@@ -6291,9 +5931,8 @@ func (x *GetScreenResultsReq) GetAccessToken() string {
 
 type GetScreenResultsRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	Questions     []*ResultsQuestion     `protobuf:"bytes,2,rep,name=questions,proto3" json:"questions,omitempty"`
-	Teams         []*TeamResult          `protobuf:"bytes,3,rep,name=teams,proto3" json:"teams,omitempty"`
+	Questions     []*ResultsQuestion     `protobuf:"bytes,1,rep,name=questions,proto3" json:"questions,omitempty"`
+	Teams         []*TeamResult          `protobuf:"bytes,2,rep,name=teams,proto3" json:"teams,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -6328,13 +5967,6 @@ func (*GetScreenResultsRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{114}
 }
 
-func (x *GetScreenResultsRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *GetScreenResultsRsp) GetQuestions() []*ResultsQuestion {
 	if x != nil {
 		return x.Questions
@@ -6450,21 +6082,19 @@ func (x *AnswerParticipationReq) GetAnswer() string {
 
 type ParticipationRsp struct {
 	state protoimpl.MessageState `protogen:"open.v1"`
-	// Пустая строка при успехе; иначе сообщение об ошибке для пользователя.
-	Error string `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	// Название команды. Данные доступны только по действительному токену.
-	TeamName string `protobuf:"bytes,2,opt,name=team_name,json=teamName,proto3" json:"team_name,omitempty"`
+	TeamName string `protobuf:"bytes,1,opt,name=team_name,json=teamName,proto3" json:"team_name,omitempty"`
 	// Название игры.
-	GameName string `protobuf:"bytes,3,opt,name=game_name,json=gameName,proto3" json:"game_name,omitempty"`
+	GameName string `protobuf:"bytes,2,opt,name=game_name,json=gameName,proto3" json:"game_name,omitempty"`
 	// Плановое начало игры, UTC (RFC 3339 в JSON).
-	StartAt *timestamppb.Timestamp `protobuf:"bytes,4,opt,name=start_at,json=startAt,proto3" json:"start_at,omitempty"`
+	StartAt *timestamppb.Timestamp `protobuf:"bytes,3,opt,name=start_at,json=startAt,proto3" json:"start_at,omitempty"`
 	// Заявленное число участников команды.
-	ParticipantsCount int32 `protobuf:"varint,5,opt,name=participants_count,json=participantsCount,proto3" json:"participants_count,omitempty"`
+	ParticipantsCount int32 `protobuf:"varint,4,opt,name=participants_count,json=participantsCount,proto3" json:"participants_count,omitempty"`
 	// pending — ожидает ответа, confirmed — подтверждено, cancelled — отменено.
-	Status string `protobuf:"bytes,6,opt,name=status,proto3" json:"status,omitempty"`
+	Status string `protobuf:"bytes,5,opt,name=status,proto3" json:"status,omitempty"`
 	// Новые ответы закрыты: наступило плановое начало или игра вышла из draft.
 	// Изменение уже принятого решения запрещено независимо от этого поля.
-	Closed        bool `protobuf:"varint,7,opt,name=closed,proto3" json:"closed,omitempty"`
+	Closed        bool `protobuf:"varint,6,opt,name=closed,proto3" json:"closed,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -6499,13 +6129,6 @@ func (*ParticipationRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{117}
 }
 
-func (x *ParticipationRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *ParticipationRsp) GetTeamName() string {
 	if x != nil {
 		return x.TeamName
@@ -6730,8 +6353,7 @@ func (x *GetGameReq) GetID() int32 {
 
 type GetGameRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	Game          *Game                  `protobuf:"bytes,2,opt,name=game,proto3" json:"game,omitempty"`
+	Game          *Game                  `protobuf:"bytes,1,opt,name=game,proto3" json:"game,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -6766,13 +6388,6 @@ func (*GetGameRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{120}
 }
 
-func (x *GetGameRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *GetGameRsp) GetGame() *Game {
 	if x != nil {
 		return x.Game
@@ -6826,9 +6441,8 @@ func (x *GetGameAnswersReq) GetGameID() int32 {
 
 type GetGameAnswersRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	Questions     []*Question            `protobuf:"bytes,2,rep,name=questions,proto3" json:"questions,omitempty"`
-	Teams         []*TeamAnswers         `protobuf:"bytes,3,rep,name=teams,proto3" json:"teams,omitempty"`
+	Questions     []*Question            `protobuf:"bytes,1,rep,name=questions,proto3" json:"questions,omitempty"`
+	Teams         []*TeamAnswers         `protobuf:"bytes,2,rep,name=teams,proto3" json:"teams,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -6863,13 +6477,6 @@ func (*GetGameAnswersRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{122}
 }
 
-func (x *GetGameAnswersRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *GetGameAnswersRsp) GetQuestions() []*Question {
 	if x != nil {
 		return x.Questions
@@ -7066,9 +6673,8 @@ func (x *TeamResult) GetActionsCount() int32 {
 
 type GetGameResultsRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	Questions     []*ResultsQuestion     `protobuf:"bytes,2,rep,name=questions,proto3" json:"questions,omitempty"`
-	Teams         []*TeamResult          `protobuf:"bytes,3,rep,name=teams,proto3" json:"teams,omitempty"`
+	Questions     []*ResultsQuestion     `protobuf:"bytes,1,rep,name=questions,proto3" json:"questions,omitempty"`
+	Teams         []*TeamResult          `protobuf:"bytes,2,rep,name=teams,proto3" json:"teams,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -7103,13 +6709,6 @@ func (*GetGameResultsRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{126}
 }
 
-func (x *GetGameResultsRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *GetGameResultsRsp) GetQuestions() []*ResultsQuestion {
 	if x != nil {
 		return x.Questions
@@ -7310,8 +6909,7 @@ func (x *CreateGameReviewReq) GetText() string {
 
 type CreateGameReviewRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	Review        *GameReview            `protobuf:"bytes,2,opt,name=review,proto3" json:"review,omitempty"`
+	Review        *GameReview            `protobuf:"bytes,1,opt,name=review,proto3" json:"review,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -7346,13 +6944,6 @@ func (*CreateGameReviewRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{129}
 }
 
-func (x *CreateGameReviewRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *CreateGameReviewRsp) GetReview() *GameReview {
 	if x != nil {
 		return x.Review
@@ -7486,10 +7077,9 @@ func (*GetReviewsForModerationReq) Descriptor() ([]byte, []int) {
 
 type GetGameReviewsRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	AverageRating float64                `protobuf:"fixed64,2,opt,name=average_rating,json=averageRating,proto3" json:"average_rating,omitempty"`
-	ReviewsCount  int32                  `protobuf:"varint,3,opt,name=reviews_count,json=reviewsCount,proto3" json:"reviews_count,omitempty"`
-	Reviews       []*GameReview          `protobuf:"bytes,4,rep,name=reviews,proto3" json:"reviews,omitempty"`
+	AverageRating float64                `protobuf:"fixed64,1,opt,name=average_rating,json=averageRating,proto3" json:"average_rating,omitempty"`
+	ReviewsCount  int32                  `protobuf:"varint,2,opt,name=reviews_count,json=reviewsCount,proto3" json:"reviews_count,omitempty"`
+	Reviews       []*GameReview          `protobuf:"bytes,3,rep,name=reviews,proto3" json:"reviews,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -7524,13 +7114,6 @@ func (*GetGameReviewsRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{133}
 }
 
-func (x *GetGameReviewsRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *GetGameReviewsRsp) GetAverageRating() float64 {
 	if x != nil {
 		return x.AverageRating
@@ -7606,8 +7189,7 @@ func (x *ModerateGameReviewReq) GetStatus() string {
 
 type ModerateGameReviewRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	Review        *GameReview            `protobuf:"bytes,2,opt,name=review,proto3" json:"review,omitempty"`
+	Review        *GameReview            `protobuf:"bytes,1,opt,name=review,proto3" json:"review,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -7642,13 +7224,6 @@ func (*ModerateGameReviewRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{135}
 }
 
-func (x *ModerateGameReviewRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *ModerateGameReviewRsp) GetReview() *GameReview {
 	if x != nil {
 		return x.Review
@@ -7750,7 +7325,6 @@ func (x *UpdateGameReq) GetLocation() string {
 
 type UpdateGameRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -7785,13 +7359,6 @@ func (*UpdateGameRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{137}
 }
 
-func (x *UpdateGameRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type StartGameReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	ID            int32                  `protobuf:"varint,1,opt,name=ID,proto3" json:"ID,omitempty"`
@@ -7838,7 +7405,6 @@ func (x *StartGameReq) GetID() int32 {
 
 type StartGameRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -7873,13 +7439,6 @@ func (*StartGameRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{139}
 }
 
-func (x *StartGameRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type PauseGameReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	ID            int32                  `protobuf:"varint,1,opt,name=ID,proto3" json:"ID,omitempty"`
@@ -7926,7 +7485,6 @@ func (x *PauseGameReq) GetID() int32 {
 
 type PauseGameRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -7961,13 +7519,6 @@ func (*PauseGameRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{141}
 }
 
-func (x *PauseGameRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type PlayGameReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	ID            int32                  `protobuf:"varint,1,opt,name=ID,proto3" json:"ID,omitempty"`
@@ -8014,7 +7565,6 @@ func (x *PlayGameReq) GetID() int32 {
 
 type PlayGameRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -8049,13 +7599,6 @@ func (*PlayGameRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{143}
 }
 
-func (x *PlayGameRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type FinishGameReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	ID            int32                  `protobuf:"varint,1,opt,name=ID,proto3" json:"ID,omitempty"`
@@ -8102,7 +7645,6 @@ func (x *FinishGameReq) GetID() int32 {
 
 type FinishGameRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -8137,13 +7679,6 @@ func (*FinishGameRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{145}
 }
 
-func (x *FinishGameRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type ResetGameReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	ID            int32                  `protobuf:"varint,1,opt,name=ID,proto3" json:"ID,omitempty"`
@@ -8190,7 +7725,6 @@ func (x *ResetGameReq) GetID() int32 {
 
 type ResetGameRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -8225,13 +7759,6 @@ func (*ResetGameRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{147}
 }
 
-func (x *ResetGameRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type DeleteGameReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	ID            int32                  `protobuf:"varint,1,opt,name=ID,proto3" json:"ID,omitempty"`
@@ -8278,7 +7805,6 @@ func (x *DeleteGameReq) GetID() int32 {
 
 type DeleteGameRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -8313,13 +7839,6 @@ func (*DeleteGameRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{149}
 }
 
-func (x *DeleteGameRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type AddTeamReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	GameID        int32                  `protobuf:"varint,1,opt,name=gameID,proto3" json:"gameID,omitempty"`
@@ -8382,9 +7901,8 @@ func (x *AddTeamReq) GetCaptainEmail() string {
 
 type AddTeamRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	ID            int32                  `protobuf:"varint,2,opt,name=ID,proto3" json:"ID,omitempty"`
-	Password      string                 `protobuf:"bytes,3,opt,name=password,proto3" json:"password,omitempty"`
+	ID            int32                  `protobuf:"varint,1,opt,name=ID,proto3" json:"ID,omitempty"`
+	Password      string                 `protobuf:"bytes,2,opt,name=password,proto3" json:"password,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -8419,13 +7937,6 @@ func (*AddTeamRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{151}
 }
 
-func (x *AddTeamRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *AddTeamRsp) GetID() int32 {
 	if x != nil {
 		return x.ID
@@ -8494,7 +8005,6 @@ func (x *UpdateTeamReq) GetName() string {
 
 type UpdateTeamRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -8529,13 +8039,6 @@ func (*UpdateTeamRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{153}
 }
 
-func (x *UpdateTeamRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type DeleteTeamReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	ID            int64                  `protobuf:"varint,1,opt,name=ID,proto3" json:"ID,omitempty"`
@@ -8582,7 +8085,6 @@ func (x *DeleteTeamReq) GetID() int64 {
 
 type DeleteTeamRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -8617,13 +8119,6 @@ func (*DeleteTeamRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{155}
 }
 
-func (x *DeleteTeamRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type GiveTeamApplicationsReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	ID            int64                  `protobuf:"varint,1,opt,name=ID,proto3" json:"ID,omitempty"`
@@ -8678,7 +8173,6 @@ func (x *GiveTeamApplicationsReq) GetName() string {
 
 type GiveTeamApplicationsRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -8713,13 +8207,6 @@ func (*GiveTeamApplicationsRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{157}
 }
 
-func (x *GiveTeamApplicationsRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type GetTeamStoryReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	ID            int64                  `protobuf:"varint,1,opt,name=ID,proto3" json:"ID,omitempty"`
@@ -8774,10 +8261,9 @@ func (x *GetTeamStoryReq) GetPassword() string {
 
 type GetTeamStoryRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	Story         *Story                 `protobuf:"bytes,2,opt,name=story,proto3" json:"story,omitempty"`
-	Game          *Game                  `protobuf:"bytes,3,opt,name=game,proto3" json:"game,omitempty"`
-	Actions       []*TeamAction          `protobuf:"bytes,4,rep,name=actions,proto3" json:"actions,omitempty"`
+	Story         *Story                 `protobuf:"bytes,1,opt,name=story,proto3" json:"story,omitempty"`
+	Game          *Game                  `protobuf:"bytes,2,opt,name=game,proto3" json:"game,omitempty"`
+	Actions       []*TeamAction          `protobuf:"bytes,3,rep,name=actions,proto3" json:"actions,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -8812,13 +8298,6 @@ func (*GetTeamStoryRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{159}
 }
 
-func (x *GetTeamStoryRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *GetTeamStoryRsp) GetStory() *Story {
 	if x != nil {
 		return x.Story
@@ -8954,7 +8433,6 @@ func (x *AddTeamActionReq) GetCode() string {
 
 type AddTeamActionRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -8989,13 +8467,6 @@ func (*AddTeamActionRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{162}
 }
 
-func (x *AddTeamActionRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type DeleteLastTeamActionReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	ID            int64                  `protobuf:"varint,1,opt,name=ID,proto3" json:"ID,omitempty"`
@@ -9042,7 +8513,6 @@ func (x *DeleteLastTeamActionReq) GetID() int64 {
 
 type DeleteLastTeamActionRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -9077,13 +8547,6 @@ func (*DeleteLastTeamActionRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{164}
 }
 
-func (x *DeleteLastTeamActionRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type GetTeamAnswersReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	ID            int64                  `protobuf:"varint,1,opt,name=ID,proto3" json:"ID,omitempty"`
@@ -9138,8 +8601,7 @@ func (x *GetTeamAnswersReq) GetPassword() string {
 
 type GetTeamAnswersRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	Answers       []*Answer              `protobuf:"bytes,2,rep,name=answers,proto3" json:"answers,omitempty"`
+	Answers       []*Answer              `protobuf:"bytes,1,rep,name=answers,proto3" json:"answers,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -9174,13 +8636,6 @@ func (*GetTeamAnswersRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{166}
 }
 
-func (x *GetTeamAnswersRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *GetTeamAnswersRsp) GetAnswers() []*Answer {
 	if x != nil {
 		return x.Answers
@@ -9250,7 +8705,6 @@ func (x *SubmitTeamAnswersReq) GetAnswers() []*Answer {
 
 type SubmitTeamAnswersRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -9285,13 +8739,6 @@ func (*SubmitTeamAnswersRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{168}
 }
 
-func (x *SubmitTeamAnswersRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type SetTeamAnswerScoreReq struct {
 	state        protoimpl.MessageState `protogen:"open.v1"`
 	ID           int64                  `protobuf:"varint,1,opt,name=ID,proto3" json:"ID,omitempty"`
@@ -9355,7 +8802,6 @@ func (x *SetTeamAnswerScoreReq) GetScore() int32 {
 
 type SetTeamAnswerScoreRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -9390,13 +8836,6 @@ func (*SetTeamAnswerScoreRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{170}
 }
 
-func (x *SetTeamAnswerScoreRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type UpdateScenarioBackgroundReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	ID            int32                  `protobuf:"varint,1,opt,name=ID,proto3" json:"ID,omitempty"`
@@ -9451,7 +8890,6 @@ func (x *UpdateScenarioBackgroundReq) GetBackground() string {
 
 type UpdateScenarioBackgroundRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -9486,13 +8924,6 @@ func (*UpdateScenarioBackgroundRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{172}
 }
 
-func (x *UpdateScenarioBackgroundRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 type IssueGameTicketsReq struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	GameID        int32                  `protobuf:"varint,1,opt,name=gameID,proto3" json:"gameID,omitempty"`
@@ -9547,8 +8978,7 @@ func (x *IssueGameTicketsReq) GetCount() int32 {
 
 type IssueGameTicketsRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	Tickets       []*Ticket              `protobuf:"bytes,2,rep,name=tickets,proto3" json:"tickets,omitempty"`
+	Tickets       []*Ticket              `protobuf:"bytes,1,rep,name=tickets,proto3" json:"tickets,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -9583,13 +9013,6 @@ func (*IssueGameTicketsRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{174}
 }
 
-func (x *IssueGameTicketsRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *IssueGameTicketsRsp) GetTickets() []*Ticket {
 	if x != nil {
 		return x.Tickets
@@ -9695,8 +9118,7 @@ func (x *GetTicketReq) GetToken() string {
 
 type GetTicketRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	Ticket        *TicketPage            `protobuf:"bytes,2,opt,name=ticket,proto3" json:"ticket,omitempty"`
+	Ticket        *TicketPage            `protobuf:"bytes,1,opt,name=ticket,proto3" json:"ticket,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -9731,13 +9153,6 @@ func (*GetTicketRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{177}
 }
 
-func (x *GetTicketRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *GetTicketRsp) GetTicket() *TicketPage {
 	if x != nil {
 		return x.Ticket
@@ -9791,8 +9206,7 @@ func (x *AcceptTicketReq) GetToken() string {
 
 type AcceptTicketRsp struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
-	Error         string                 `protobuf:"bytes,1,opt,name=error,proto3" json:"error,omitempty"`
-	Ticket        *TicketPage            `protobuf:"bytes,2,opt,name=ticket,proto3" json:"ticket,omitempty"`
+	Ticket        *TicketPage            `protobuf:"bytes,1,opt,name=ticket,proto3" json:"ticket,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -9827,13 +9241,6 @@ func (*AcceptTicketRsp) Descriptor() ([]byte, []int) {
 	return file_main_proto_rawDescGZIP(), []int{179}
 }
 
-func (x *AcceptTicketRsp) GetError() string {
-	if x != nil {
-		return x.Error
-	}
-	return ""
-}
-
 func (x *AcceptTicketRsp) GetTicket() *TicketPage {
 	if x != nil {
 		return x.Ticket
@@ -9957,47 +9364,38 @@ const file_main_proto_rawDesc = "" +
 	"\busername\x18\x01 \x01(\tR\busername\x12\x14\n" +
 	"\x05email\x18\x02 \x01(\tR\x05email\x12!\n" +
 	"\faccept_terms\x18\x03 \x01(\bR\vacceptTerms\x12%\n" +
-	"\x0eaccept_privacy\x18\x04 \x01(\bR\racceptPrivacy\"!\n" +
-	"\tSignupRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"*\n" +
+	"\x0eaccept_privacy\x18\x04 \x01(\bR\racceptPrivacy\"\v\n" +
+	"\tSignupRsp\"*\n" +
 	"\x12RefreshPasswordReq\x12\x14\n" +
-	"\x05email\x18\x01 \x01(\tR\x05email\"*\n" +
-	"\x12RefreshPasswordRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"<\n" +
+	"\x05email\x18\x01 \x01(\tR\x05email\"\x14\n" +
+	"\x12RefreshPasswordRsp\"<\n" +
 	"\bLoginReq\x12\x14\n" +
 	"\x05email\x18\x01 \x01(\tR\x05email\x12\x1a\n" +
-	"\bpassword\x18\x02 \x01(\tR\bpassword\"f\n" +
-	"\bLoginRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x12 \n" +
-	"\vaccessToken\x18\x02 \x01(\tR\vaccessToken\x12\"\n" +
-	"\frefreshToken\x18\x03 \x01(\tR\frefreshToken\"0\n" +
+	"\bpassword\x18\x02 \x01(\tR\bpassword\"P\n" +
+	"\bLoginRsp\x12 \n" +
+	"\vaccessToken\x18\x01 \x01(\tR\vaccessToken\x12\"\n" +
+	"\frefreshToken\x18\x02 \x01(\tR\frefreshToken\"0\n" +
 	"\n" +
 	"RefreshReq\x12\"\n" +
-	"\frefreshToken\x18\x01 \x01(\tR\frefreshToken\"h\n" +
+	"\frefreshToken\x18\x01 \x01(\tR\frefreshToken\"R\n" +
 	"\n" +
-	"RefreshRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x12 \n" +
-	"\vaccessToken\x18\x02 \x01(\tR\vaccessToken\x12\"\n" +
-	"\frefreshToken\x18\x03 \x01(\tR\frefreshToken\"\x12\n" +
-	"\x10DeleteAccountReq\"(\n" +
-	"\x10DeleteAccountRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"\r\n" +
-	"\vGetTermsReq\"7\n" +
-	"\vGetTermsRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x12\x12\n" +
-	"\x04text\x18\x02 \x01(\tR\x04text\"\x0f\n" +
-	"\rGetPrivacyReq\"9\n" +
-	"\rGetPrivacyRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x12\x12\n" +
-	"\x04text\x18\x02 \x01(\tR\x04text\"\x0f\n" +
-	"\rGetConsentReq\"9\n" +
-	"\rGetConsentRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x12\x12\n" +
-	"\x04text\x18\x02 \x01(\tR\x04text\"\r\n" +
-	"\vGetUsersReq\"_\n" +
-	"\vGetUsersRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x12:\n" +
-	"\x05users\x18\x02 \x03(\v2$.crabs.evening_detective_server.UserR\x05users\"\xb6\x01\n" +
+	"RefreshRsp\x12 \n" +
+	"\vaccessToken\x18\x01 \x01(\tR\vaccessToken\x12\"\n" +
+	"\frefreshToken\x18\x02 \x01(\tR\frefreshToken\"\x12\n" +
+	"\x10DeleteAccountReq\"\x12\n" +
+	"\x10DeleteAccountRsp\"\r\n" +
+	"\vGetTermsReq\"!\n" +
+	"\vGetTermsRsp\x12\x12\n" +
+	"\x04text\x18\x01 \x01(\tR\x04text\"\x0f\n" +
+	"\rGetPrivacyReq\"#\n" +
+	"\rGetPrivacyRsp\x12\x12\n" +
+	"\x04text\x18\x01 \x01(\tR\x04text\"\x0f\n" +
+	"\rGetConsentReq\"#\n" +
+	"\rGetConsentRsp\x12\x12\n" +
+	"\x04text\x18\x01 \x01(\tR\x04text\"\r\n" +
+	"\vGetUsersReq\"I\n" +
+	"\vGetUsersRsp\x12:\n" +
+	"\x05users\x18\x01 \x03(\v2$.crabs.evening_detective_server.UserR\x05users\"\xb6\x01\n" +
 	"\x04User\x12\x0e\n" +
 	"\x02ID\x18\x01 \x01(\x05R\x02ID\x12\x1a\n" +
 	"\busername\x18\x02 \x01(\tR\busername\x12\x14\n" +
@@ -10007,60 +9405,50 @@ const file_main_proto_rawDesc = "" +
 	"\n" +
 	"created_at\x18\x06 \x01(\v2\x1a.google.protobuf.TimestampR\tcreatedAt\" \n" +
 	"\x0eGetUserByIDReq\x12\x0e\n" +
-	"\x02ID\x18\x01 \x01(\x05R\x02ID\"`\n" +
-	"\x0eGetUserByIDRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x128\n" +
-	"\x04user\x18\x02 \x01(\v2$.crabs.evening_detective_server.UserR\x04user\"\n" +
+	"\x02ID\x18\x01 \x01(\x05R\x02ID\"J\n" +
+	"\x0eGetUserByIDRsp\x128\n" +
+	"\x04user\x18\x01 \x01(\v2$.crabs.evening_detective_server.UserR\x04user\"\n" +
 	"\n" +
-	"\bGetMeReq\"Z\n" +
-	"\bGetMeRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x128\n" +
-	"\x04user\x18\x02 \x01(\v2$.crabs.evening_detective_server.UserR\x04user\"J\n" +
+	"\bGetMeReq\"D\n" +
+	"\bGetMeRsp\x128\n" +
+	"\x04user\x18\x01 \x01(\v2$.crabs.evening_detective_server.UserR\x04user\"J\n" +
 	"\x15ChangeUserPasswordReq\x12\x0e\n" +
 	"\x02ID\x18\x01 \x01(\x05R\x02ID\x12!\n" +
 	"\fnew_password\x18\x02 \x01(\tR\vnewPassword\"\x17\n" +
 	"\x15ChangeUserPasswordRsp\"4\n" +
 	"\x0eAddUserRoleReq\x12\x0e\n" +
 	"\x02ID\x18\x01 \x01(\x05R\x02ID\x12\x12\n" +
-	"\x04role\x18\x02 \x01(\tR\x04role\"&\n" +
-	"\x0eAddUserRoleRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"7\n" +
+	"\x04role\x18\x02 \x01(\tR\x04role\"\x10\n" +
+	"\x0eAddUserRoleRsp\"7\n" +
 	"\x11DeleteUserRoleReq\x12\x0e\n" +
 	"\x02ID\x18\x01 \x01(\x05R\x02ID\x12\x12\n" +
-	"\x04role\x18\x02 \x01(\tR\x04role\")\n" +
-	"\x11DeleteUserRoleRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"\x13\n" +
-	"\x11GetPermissionsReq\"K\n" +
-	"\x11GetPermissionsRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x12 \n" +
-	"\vpermissions\x18\x02 \x03(\tR\vpermissions\"?\n" +
+	"\x04role\x18\x02 \x01(\tR\x04role\"\x13\n" +
+	"\x11DeleteUserRoleRsp\"\x13\n" +
+	"\x11GetPermissionsReq\"5\n" +
+	"\x11GetPermissionsRsp\x12 \n" +
+	"\vpermissions\x18\x01 \x03(\tR\vpermissions\"?\n" +
 	"\rUploadFileReq\x12\x1a\n" +
 	"\bfilename\x18\x01 \x01(\tR\bfilename\x12\x12\n" +
-	"\x04data\x18\x02 \x01(\fR\x04data\"_\n" +
-	"\rUploadFileRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x12\x1a\n" +
-	"\bfilename\x18\x02 \x01(\tR\bfilename\x12\x1c\n" +
-	"\tfile_type\x18\x03 \x01(\tR\tfile_type\"-\n" +
+	"\x04data\x18\x02 \x01(\fR\x04data\"I\n" +
+	"\rUploadFileRsp\x12\x1a\n" +
+	"\bfilename\x18\x01 \x01(\tR\bfilename\x12\x1c\n" +
+	"\tfile_type\x18\x02 \x01(\tR\tfile_type\"-\n" +
 	"\x0fDownloadFileReq\x12\x1a\n" +
 	"\bfilename\x18\x01 \x01(\tR\bfilename\"$\n" +
 	"\x0eAddScenarioReq\x12\x12\n" +
-	"\x04name\x18\x01 \x01(\tR\x04name\"6\n" +
-	"\x0eAddScenarioRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x12\x0e\n" +
-	"\x02ID\x18\x02 \x01(\x05R\x02ID\"\x13\n" +
-	"\x11GetMyScenariosReq\"q\n" +
-	"\x11GetMyScenariosRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x12F\n" +
-	"\tscenarios\x18\x02 \x03(\v2(.crabs.evening_detective_server.ScenarioR\tscenarios\"\x18\n" +
-	"\x16GetScenariosCatalogReq\"v\n" +
-	"\x16GetScenariosCatalogRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x12F\n" +
-	"\tscenarios\x18\x02 \x03(\v2(.crabs.evening_detective_server.ScenarioR\tscenarios\" \n" +
+	"\x04name\x18\x01 \x01(\tR\x04name\" \n" +
+	"\x0eAddScenarioRsp\x12\x0e\n" +
+	"\x02ID\x18\x01 \x01(\x05R\x02ID\"\x13\n" +
+	"\x11GetMyScenariosReq\"[\n" +
+	"\x11GetMyScenariosRsp\x12F\n" +
+	"\tscenarios\x18\x01 \x03(\v2(.crabs.evening_detective_server.ScenarioR\tscenarios\"\x18\n" +
+	"\x16GetScenariosCatalogReq\"`\n" +
+	"\x16GetScenariosCatalogRsp\x12F\n" +
+	"\tscenarios\x18\x01 \x03(\v2(.crabs.evening_detective_server.ScenarioR\tscenarios\" \n" +
 	"\x0eGetScenarioReq\x12\x0e\n" +
-	"\x02ID\x18\x01 \x01(\x05R\x02ID\"l\n" +
-	"\x0eGetScenarioRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x12D\n" +
-	"\bscenario\x18\x02 \x01(\v2(.crabs.evening_detective_server.ScenarioR\bscenario\"\x9e\x04\n" +
+	"\x02ID\x18\x01 \x01(\x05R\x02ID\"V\n" +
+	"\x0eGetScenarioRsp\x12D\n" +
+	"\bscenario\x18\x01 \x01(\v2(.crabs.evening_detective_server.ScenarioR\bscenario\"\x9e\x04\n" +
 	"\bScenario\x12\x0e\n" +
 	"\x02ID\x18\x01 \x01(\x05R\x02ID\x12\x12\n" +
 	"\x04name\x18\x02 \x01(\tR\x04name\x12%\n" +
@@ -10134,70 +9522,57 @@ const file_main_proto_rawDesc = "" +
 	"\x02ID\x18\x01 \x01(\x05R\x02ID\x12\x12\n" +
 	"\x04name\x18\x02 \x01(\tR\x04name\x12 \n" +
 	"\vdescription\x18\x03 \x01(\tR\vdescription\x12\x14\n" +
-	"\x05image\x18\x04 \x01(\tR\x05image\")\n" +
-	"\x11UpdateScenarioRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"#\n" +
+	"\x05image\x18\x04 \x01(\tR\x05image\"\x13\n" +
+	"\x11UpdateScenarioRsp\"#\n" +
 	"\x11PublicScenarioReq\x12\x0e\n" +
-	"\x02ID\x18\x01 \x01(\x05R\x02ID\")\n" +
-	"\x11PublicScenarioRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"\"\n" +
+	"\x02ID\x18\x01 \x01(\x05R\x02ID\"\x13\n" +
+	"\x11PublicScenarioRsp\"\"\n" +
 	"\x10DraftScenarioReq\x12\x0e\n" +
-	"\x02ID\x18\x01 \x01(\x05R\x02ID\"(\n" +
-	"\x10DraftScenarioRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"#\n" +
+	"\x02ID\x18\x01 \x01(\x05R\x02ID\"\x12\n" +
+	"\x10DraftScenarioRsp\"#\n" +
 	"\x11DeleteScenarioReq\x12\x0e\n" +
-	"\x02ID\x18\x01 \x01(\x05R\x02ID\")\n" +
-	"\x11DeleteScenarioRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"b\n" +
+	"\x02ID\x18\x01 \x01(\x05R\x02ID\"\x13\n" +
+	"\x11DeleteScenarioRsp\"b\n" +
 	"\x13AddScenarioPlaceReq\x12\x0e\n" +
 	"\x02ID\x18\x01 \x01(\x05R\x02ID\x12;\n" +
-	"\x05place\x18\x02 \x01(\v2%.crabs.evening_detective_server.PlaceR\x05place\"+\n" +
-	"\x13AddScenarioPlaceRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"y\n" +
+	"\x05place\x18\x02 \x01(\v2%.crabs.evening_detective_server.PlaceR\x05place\"\x15\n" +
+	"\x13AddScenarioPlaceRsp\"y\n" +
 	"\x16UpdateScenarioPlaceReq\x12\x0e\n" +
 	"\x02ID\x18\x01 \x01(\x05R\x02ID\x12\x12\n" +
 	"\x04code\x18\x02 \x01(\tR\x04code\x12;\n" +
-	"\x05place\x18\x03 \x01(\v2%.crabs.evening_detective_server.PlaceR\x05place\".\n" +
-	"\x16UpdateScenarioPlaceRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"<\n" +
+	"\x05place\x18\x03 \x01(\v2%.crabs.evening_detective_server.PlaceR\x05place\"\x18\n" +
+	"\x16UpdateScenarioPlaceRsp\"<\n" +
 	"\x16DeleteScenarioPlaceReq\x12\x0e\n" +
 	"\x02ID\x18\x01 \x01(\x05R\x02ID\x12\x12\n" +
-	"\x04code\x18\x02 \x01(\tR\x04code\".\n" +
-	"\x16DeleteScenarioPlaceRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"y\n" +
+	"\x04code\x18\x02 \x01(\tR\x04code\"\x18\n" +
+	"\x16DeleteScenarioPlaceRsp\"y\n" +
 	"\x1bUpdateScenarioConclusionReq\x12\x0e\n" +
 	"\x02ID\x18\x01 \x01(\x05R\x02ID\x12J\n" +
 	"\n" +
 	"conclusion\x18\x02 \x01(\v2*.crabs.evening_detective_server.ConclusionR\n" +
-	"conclusion\"3\n" +
-	"\x1bUpdateScenarioConclusionRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"z\n" +
+	"conclusion\"\x1d\n" +
+	"\x1bUpdateScenarioConclusionRsp\"z\n" +
 	"\x16UpdateScenarioIntroReq\x12\x0e\n" +
 	"\x02ID\x18\x01 \x01(\x05R\x02ID\x12P\n" +
-	"\fintroduction\x18\x02 \x01(\v2,.crabs.evening_detective_server.IntroductionR\fintroduction\".\n" +
-	"\x16UpdateScenarioIntroRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"n\n" +
+	"\fintroduction\x18\x02 \x01(\v2,.crabs.evening_detective_server.IntroductionR\fintroduction\"\x18\n" +
+	"\x16UpdateScenarioIntroRsp\"n\n" +
 	"\x16AddScenarioQuestionReq\x12\x0e\n" +
 	"\x02ID\x18\x01 \x01(\x05R\x02ID\x12D\n" +
-	"\bquestion\x18\x02 \x01(\v2(.crabs.evening_detective_server.QuestionR\bquestion\".\n" +
-	"\x16AddScenarioQuestionRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"\x85\x01\n" +
+	"\bquestion\x18\x02 \x01(\v2(.crabs.evening_detective_server.QuestionR\bquestion\"\x18\n" +
+	"\x16AddScenarioQuestionRsp\"\x85\x01\n" +
 	"\x19UpdateScenarioQuestionReq\x12\x0e\n" +
 	"\x02ID\x18\x01 \x01(\x05R\x02ID\x12\x12\n" +
 	"\x04code\x18\x02 \x01(\tR\x04code\x12D\n" +
-	"\bquestion\x18\x03 \x01(\v2(.crabs.evening_detective_server.QuestionR\bquestion\"1\n" +
-	"\x19UpdateScenarioQuestionRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"?\n" +
+	"\bquestion\x18\x03 \x01(\v2(.crabs.evening_detective_server.QuestionR\bquestion\"\x1b\n" +
+	"\x19UpdateScenarioQuestionRsp\"?\n" +
 	"\x19DeleteScenarioQuestionReq\x12\x0e\n" +
 	"\x02ID\x18\x01 \x01(\x05R\x02ID\x12\x12\n" +
-	"\x04code\x18\x02 \x01(\tR\x04code\"1\n" +
-	"\x19DeleteScenarioQuestionRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\",\n" +
+	"\x04code\x18\x02 \x01(\tR\x04code\"\x1b\n" +
+	"\x19DeleteScenarioQuestionRsp\",\n" +
 	"\x1aDownloadScenarioArchiveReq\x12\x0e\n" +
-	"\x02ID\x18\x01 \x01(\x05R\x02ID\"@\n" +
-	"\x18UploadScenarioArchiveRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x12\x0e\n" +
-	"\x02ID\x18\x02 \x01(\x05R\x02ID\"\xcd\x01\n" +
+	"\x02ID\x18\x01 \x01(\x05R\x02ID\"*\n" +
+	"\x18UploadScenarioArchiveRsp\x12\x0e\n" +
+	"\x02ID\x18\x01 \x01(\x05R\x02ID\"\xcd\x01\n" +
 	"\n" +
 	"AddGameReq\x12\x12\n" +
 	"\x04name\x18\x01 \x01(\tR\x04name\x12 \n" +
@@ -10207,15 +9582,13 @@ const file_main_proto_rawDesc = "" +
 	"scenarioID\x18\x04 \x01(\x05R\n" +
 	"scenarioID\x12\x16\n" +
 	"\x06format\x18\x05 \x01(\tR\x06format\x12\x1a\n" +
-	"\blocation\x18\x06 \x01(\tR\blocation\"2\n" +
+	"\blocation\x18\x06 \x01(\tR\blocation\"\x1c\n" +
 	"\n" +
-	"AddGameRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x12\x0e\n" +
-	"\x02ID\x18\x02 \x01(\x05R\x02ID\"\r\n" +
-	"\vGetGamesReq\"_\n" +
-	"\vGetGamesRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x12:\n" +
-	"\x05games\x18\x02 \x03(\v2$.crabs.evening_detective_server.GameR\x05games\"\xe9\x03\n" +
+	"AddGameRsp\x12\x0e\n" +
+	"\x02ID\x18\x01 \x01(\x05R\x02ID\"\r\n" +
+	"\vGetGamesReq\"I\n" +
+	"\vGetGamesRsp\x12:\n" +
+	"\x05games\x18\x01 \x03(\v2$.crabs.evening_detective_server.GameR\x05games\"\xe9\x03\n" +
 	"\x04Game\x12\x0e\n" +
 	"\x02ID\x18\x01 \x01(\x05R\x02ID\x12\x12\n" +
 	"\x04name\x18\x02 \x01(\tR\x04name\x12 \n" +
@@ -10259,38 +9632,32 @@ const file_main_proto_rawDesc = "" +
 	"\vtimer_state\x18\x13 \x01(\x0e20.crabs.evening_detective_server.ScreenTimerStateR\n" +
 	"timerStateB\t\n" +
 	"\a_gameID\"\x18\n" +
-	"\x16CreateScreenSessionReq\"m\n" +
-	"\x16CreateScreenSessionRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x12\x1a\n" +
-	"\bscreenID\x18\x02 \x01(\tR\bscreenID\x12!\n" +
-	"\faccess_token\x18\x03 \x01(\tR\vaccessToken\"Q\n" +
+	"\x16CreateScreenSessionReq\"W\n" +
+	"\x16CreateScreenSessionRsp\x12\x1a\n" +
+	"\bscreenID\x18\x01 \x01(\tR\bscreenID\x12!\n" +
+	"\faccess_token\x18\x02 \x01(\tR\vaccessToken\"Q\n" +
 	"\x11GetScreenStateReq\x12\x1a\n" +
 	"\bscreenID\x18\x01 \x01(\tR\bscreenID\x12 \n" +
-	"\vaccessToken\x18\x02 \x01(\tR\vaccessToken\"l\n" +
-	"\x11GetScreenStateRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x12A\n" +
-	"\x05state\x18\x02 \x01(\v2+.crabs.evening_detective_server.ScreenStateR\x05state\"+\n" +
+	"\vaccessToken\x18\x02 \x01(\tR\vaccessToken\"V\n" +
+	"\x11GetScreenStateRsp\x12A\n" +
+	"\x05state\x18\x01 \x01(\v2+.crabs.evening_detective_server.ScreenStateR\x05state\"+\n" +
 	"\x11GetGameScreensReq\x12\x16\n" +
-	"\x06gameID\x18\x01 \x01(\x05R\x06gameID\"p\n" +
-	"\x11GetGameScreensRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x12E\n" +
-	"\ascreens\x18\x02 \x03(\v2+.crabs.evening_detective_server.ScreenStateR\ascreens\"e\n" +
+	"\x06gameID\x18\x01 \x01(\x05R\x06gameID\"Z\n" +
+	"\x11GetGameScreensRsp\x12E\n" +
+	"\ascreens\x18\x01 \x03(\v2+.crabs.evening_detective_server.ScreenStateR\ascreens\"e\n" +
 	"\rBindScreenReq\x12\x1a\n" +
 	"\bscreenID\x18\x01 \x01(\tR\bscreenID\x12 \n" +
 	"\vaccessToken\x18\x02 \x01(\tR\vaccessToken\x12\x16\n" +
-	"\x06gameID\x18\x03 \x01(\x05R\x06gameID\"h\n" +
-	"\rBindScreenRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x12A\n" +
-	"\x05state\x18\x02 \x01(\v2+.crabs.evening_detective_server.ScreenStateR\x05state\"-\n" +
+	"\x06gameID\x18\x03 \x01(\x05R\x06gameID\"R\n" +
+	"\rBindScreenRsp\x12A\n" +
+	"\x05state\x18\x01 \x01(\v2+.crabs.evening_detective_server.ScreenStateR\x05state\"-\n" +
 	"\x0fUnbindScreenReq\x12\x1a\n" +
-	"\bscreenID\x18\x01 \x01(\tR\bscreenID\"'\n" +
-	"\x0fUnbindScreenRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"S\n" +
+	"\bscreenID\x18\x01 \x01(\tR\bscreenID\"\x11\n" +
+	"\x0fUnbindScreenRsp\"S\n" +
 	"\x11SetScreenSoundReq\x12\x1a\n" +
 	"\bscreenID\x18\x01 \x01(\tR\bscreenID\x12\"\n" +
-	"\fsoundEnabled\x18\x02 \x01(\bR\fsoundEnabled\")\n" +
-	"\x11SetScreenSoundRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"\xbc\x01\n" +
+	"\fsoundEnabled\x18\x02 \x01(\bR\fsoundEnabled\"\x13\n" +
+	"\x11SetScreenSoundRsp\"\xbc\x01\n" +
 	"\aMapItem\x12\x12\n" +
 	"\x04kind\x18\x01 \x01(\tR\x04kind\x12\x16\n" +
 	"\x06itemID\x18\x02 \x01(\x05R\x06itemID\x12\x14\n" +
@@ -10301,58 +9668,51 @@ const file_main_proto_rawDesc = "" +
 	"\x06status\x18\a \x01(\tR\x06status\x12#\n" +
 	"\rsound_enabled\x18\b \x01(\bR\fsoundEnabled\"'\n" +
 	"\rGetGameMapReq\x12\x16\n" +
-	"\x06gameID\x18\x01 \x01(\x05R\x06gameID\"d\n" +
-	"\rGetGameMapRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x12=\n" +
-	"\x05items\x18\x02 \x03(\v2'.crabs.evening_detective_server.MapItemR\x05items\"\x8e\x01\n" +
+	"\x06gameID\x18\x01 \x01(\x05R\x06gameID\"N\n" +
+	"\rGetGameMapRsp\x12=\n" +
+	"\x05items\x18\x01 \x03(\v2'.crabs.evening_detective_server.MapItemR\x05items\"\x8e\x01\n" +
 	"\x14UpdateGameMapItemReq\x12\x16\n" +
 	"\x06gameID\x18\x01 \x01(\x05R\x06gameID\x12\x12\n" +
 	"\x04kind\x18\x02 \x01(\tR\x04kind\x12\x16\n" +
 	"\x06itemID\x18\x03 \x01(\x05R\x06itemID\x12\f\n" +
 	"\x01x\x18\x04 \x01(\x05R\x01x\x12\f\n" +
 	"\x01y\x18\x05 \x01(\x05R\x01y\x12\x16\n" +
-	"\x06hidden\x18\x06 \x01(\bR\x06hidden\",\n" +
-	"\x14UpdateGameMapItemRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"j\n" +
+	"\x06hidden\x18\x06 \x01(\bR\x06hidden\"\x16\n" +
+	"\x14UpdateGameMapItemRsp\"j\n" +
 	"\x10SetScreenModeReq\x12\x16\n" +
 	"\x06gameID\x18\x01 \x01(\x05R\x06gameID\x12>\n" +
-	"\x04mode\x18\x02 \x01(\x0e2*.crabs.evening_detective_server.ScreenModeR\x04mode\"(\n" +
-	"\x10SetScreenModeRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"l\n" +
+	"\x04mode\x18\x02 \x01(\x0e2*.crabs.evening_detective_server.ScreenModeR\x04mode\"\x12\n" +
+	"\x10SetScreenModeRsp\"l\n" +
 	"\x11SetScreenTimerReq\x12\x16\n" +
 	"\x06gameID\x18\x01 \x01(\x05R\x06gameID\x12)\n" +
 	"\x10duration_seconds\x18\x02 \x01(\x03R\x0fdurationSeconds\x12\x14\n" +
-	"\x05label\x18\x03 \x01(\tR\x05label\")\n" +
-	"\x11SetScreenTimerRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"\xb0\x01\n" +
+	"\x05label\x18\x03 \x01(\tR\x05label\"\x13\n" +
+	"\x11SetScreenTimerRsp\"\xb0\x01\n" +
 	"\x14SendScreenCommandReq\x12\x16\n" +
 	"\x06gameID\x18\x01 \x01(\x05R\x06gameID\x12G\n" +
 	"\acommand\x18\x02 \x01(\x0e2-.crabs.evening_detective_server.ScreenCommandR\acommand\x12\x1f\n" +
 	"\vposition_ms\x18\x03 \x01(\x03R\n" +
 	"positionMs\x12\x16\n" +
-	"\x06volume\x18\x04 \x01(\x05R\x06volume\",\n" +
-	"\x14SendScreenCommandRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"S\n" +
+	"\x06volume\x18\x04 \x01(\x05R\x06volume\"\x16\n" +
+	"\x14SendScreenCommandRsp\"S\n" +
 	"\x13GetScreenResultsReq\x12\x1a\n" +
 	"\bscreenID\x18\x01 \x01(\tR\bscreenID\x12 \n" +
-	"\vaccessToken\x18\x02 \x01(\tR\vaccessToken\"\xbc\x01\n" +
-	"\x13GetScreenResultsRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x12M\n" +
-	"\tquestions\x18\x02 \x03(\v2/.crabs.evening_detective_server.ResultsQuestionR\tquestions\x12@\n" +
-	"\x05teams\x18\x03 \x03(\v2*.crabs.evening_detective_server.TeamResultR\x05teams\"+\n" +
+	"\vaccessToken\x18\x02 \x01(\tR\vaccessToken\"\xa6\x01\n" +
+	"\x13GetScreenResultsRsp\x12M\n" +
+	"\tquestions\x18\x01 \x03(\v2/.crabs.evening_detective_server.ResultsQuestionR\tquestions\x12@\n" +
+	"\x05teams\x18\x02 \x03(\v2*.crabs.evening_detective_server.TeamResultR\x05teams\"+\n" +
 	"\x13GetParticipationReq\x12\x14\n" +
 	"\x05token\x18\x01 \x01(\tR\x05token\"F\n" +
 	"\x16AnswerParticipationReq\x12\x14\n" +
 	"\x05token\x18\x01 \x01(\tR\x05token\x12\x16\n" +
-	"\x06answer\x18\x02 \x01(\tR\x06answer\"\xf8\x01\n" +
-	"\x10ParticipationRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x12\x1b\n" +
-	"\tteam_name\x18\x02 \x01(\tR\bteamName\x12\x1b\n" +
-	"\tgame_name\x18\x03 \x01(\tR\bgameName\x125\n" +
-	"\bstart_at\x18\x04 \x01(\v2\x1a.google.protobuf.TimestampR\astartAt\x12-\n" +
-	"\x12participants_count\x18\x05 \x01(\x05R\x11participantsCount\x12\x16\n" +
-	"\x06status\x18\x06 \x01(\tR\x06status\x12\x16\n" +
-	"\x06closed\x18\a \x01(\bR\x06closed\"\x84\x04\n" +
+	"\x06answer\x18\x02 \x01(\tR\x06answer\"\xe2\x01\n" +
+	"\x10ParticipationRsp\x12\x1b\n" +
+	"\tteam_name\x18\x01 \x01(\tR\bteamName\x12\x1b\n" +
+	"\tgame_name\x18\x02 \x01(\tR\bgameName\x125\n" +
+	"\bstart_at\x18\x03 \x01(\v2\x1a.google.protobuf.TimestampR\astartAt\x12-\n" +
+	"\x12participants_count\x18\x04 \x01(\x05R\x11participantsCount\x12\x16\n" +
+	"\x06status\x18\x05 \x01(\tR\x06status\x12\x16\n" +
+	"\x06closed\x18\x06 \x01(\bR\x06closed\"\x84\x04\n" +
 	"\x04Team\x12\x0e\n" +
 	"\x02ID\x18\x01 \x01(\x05R\x02ID\x12\x12\n" +
 	"\x04name\x18\x02 \x01(\tR\x04name\x12\x16\n" +
@@ -10369,17 +9729,15 @@ const file_main_proto_rawDesc = "" +
 	"\x18participation_email_sent\x18\f \x01(\bR\x16participationEmailSent\"\x1c\n" +
 	"\n" +
 	"GetGameReq\x12\x0e\n" +
-	"\x02ID\x18\x01 \x01(\x05R\x02ID\"\\\n" +
+	"\x02ID\x18\x01 \x01(\x05R\x02ID\"F\n" +
 	"\n" +
-	"GetGameRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x128\n" +
-	"\x04game\x18\x02 \x01(\v2$.crabs.evening_detective_server.GameR\x04game\"+\n" +
+	"GetGameRsp\x128\n" +
+	"\x04game\x18\x01 \x01(\v2$.crabs.evening_detective_server.GameR\x04game\"+\n" +
 	"\x11GetGameAnswersReq\x12\x16\n" +
-	"\x06gameID\x18\x01 \x01(\x05R\x06gameID\"\xb4\x01\n" +
-	"\x11GetGameAnswersRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x12F\n" +
-	"\tquestions\x18\x02 \x03(\v2(.crabs.evening_detective_server.QuestionR\tquestions\x12A\n" +
-	"\x05teams\x18\x03 \x03(\v2+.crabs.evening_detective_server.TeamAnswersR\x05teams\"+\n" +
+	"\x06gameID\x18\x01 \x01(\x05R\x06gameID\"\x9e\x01\n" +
+	"\x11GetGameAnswersRsp\x12F\n" +
+	"\tquestions\x18\x01 \x03(\v2(.crabs.evening_detective_server.QuestionR\tquestions\x12A\n" +
+	"\x05teams\x18\x02 \x03(\v2+.crabs.evening_detective_server.TeamAnswersR\x05teams\"+\n" +
 	"\x11GetGameResultsReq\x12\x16\n" +
 	"\x06gameID\x18\x01 \x01(\x05R\x06gameID\"9\n" +
 	"\x0fResultsQuestion\x12\x12\n" +
@@ -10392,11 +9750,10 @@ const file_main_proto_rawDesc = "" +
 	"\vtotal_score\x18\x03 \x01(\x05R\n" +
 	"totalScore\x12\x14\n" +
 	"\x05place\x18\x04 \x01(\x05R\x05place\x12#\n" +
-	"\ractions_count\x18\x05 \x01(\x05R\factionsCount\"\xba\x01\n" +
-	"\x11GetGameResultsRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x12M\n" +
-	"\tquestions\x18\x02 \x03(\v2/.crabs.evening_detective_server.ResultsQuestionR\tquestions\x12@\n" +
-	"\x05teams\x18\x03 \x03(\v2*.crabs.evening_detective_server.TeamResultR\x05teams\"\x85\x02\n" +
+	"\ractions_count\x18\x05 \x01(\x05R\factionsCount\"\xa4\x01\n" +
+	"\x11GetGameResultsRsp\x12M\n" +
+	"\tquestions\x18\x01 \x03(\v2/.crabs.evening_detective_server.ResultsQuestionR\tquestions\x12@\n" +
+	"\x05teams\x18\x02 \x03(\v2*.crabs.evening_detective_server.TeamResultR\x05teams\"\x85\x02\n" +
 	"\n" +
 	"GameReview\x12\x0e\n" +
 	"\x02ID\x18\x01 \x01(\x05R\x02ID\x12\x16\n" +
@@ -10414,28 +9771,25 @@ const file_main_proto_rawDesc = "" +
 	"\x06teamID\x18\x02 \x01(\x05R\x06teamID\x12\x1a\n" +
 	"\bpassword\x18\x03 \x01(\tR\bpassword\x12\x16\n" +
 	"\x06rating\x18\x04 \x01(\x05R\x06rating\x12\x12\n" +
-	"\x04text\x18\x05 \x01(\tR\x04text\"o\n" +
-	"\x13CreateGameReviewRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x12B\n" +
-	"\x06review\x18\x02 \x01(\v2*.crabs.evening_detective_server.GameReviewR\x06review\"+\n" +
+	"\x04text\x18\x05 \x01(\tR\x04text\"Y\n" +
+	"\x13CreateGameReviewRsp\x12B\n" +
+	"\x06review\x18\x01 \x01(\v2*.crabs.evening_detective_server.GameReviewR\x06review\"+\n" +
 	"\x11GetGameReviewsReq\x12\x16\n" +
 	"\x06gameID\x18\x01 \x01(\x05R\x06gameID\"7\n" +
 	"\x15GetScenarioReviewsReq\x12\x1e\n" +
 	"\n" +
 	"scenarioID\x18\x01 \x01(\x05R\n" +
 	"scenarioID\"\x1c\n" +
-	"\x1aGetReviewsForModerationReq\"\xbb\x01\n" +
-	"\x11GetGameReviewsRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x12%\n" +
-	"\x0eaverage_rating\x18\x02 \x01(\x01R\raverageRating\x12#\n" +
-	"\rreviews_count\x18\x03 \x01(\x05R\freviewsCount\x12D\n" +
-	"\areviews\x18\x04 \x03(\v2*.crabs.evening_detective_server.GameReviewR\areviews\"?\n" +
+	"\x1aGetReviewsForModerationReq\"\xa5\x01\n" +
+	"\x11GetGameReviewsRsp\x12%\n" +
+	"\x0eaverage_rating\x18\x01 \x01(\x01R\raverageRating\x12#\n" +
+	"\rreviews_count\x18\x02 \x01(\x05R\freviewsCount\x12D\n" +
+	"\areviews\x18\x03 \x03(\v2*.crabs.evening_detective_server.GameReviewR\areviews\"?\n" +
 	"\x15ModerateGameReviewReq\x12\x0e\n" +
 	"\x02ID\x18\x01 \x01(\x05R\x02ID\x12\x16\n" +
-	"\x06status\x18\x02 \x01(\tR\x06status\"q\n" +
-	"\x15ModerateGameReviewRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x12B\n" +
-	"\x06review\x18\x02 \x01(\v2*.crabs.evening_detective_server.GameReviewR\x06review\"\xe0\x01\n" +
+	"\x06status\x18\x02 \x01(\tR\x06status\"[\n" +
+	"\x15ModerateGameReviewRsp\x12B\n" +
+	"\x06review\x18\x01 \x01(\v2*.crabs.evening_detective_server.GameReviewR\x06review\"\xe0\x01\n" +
 	"\rUpdateGameReq\x12\x0e\n" +
 	"\x02ID\x18\x01 \x01(\x05R\x02ID\x12\x12\n" +
 	"\x04name\x18\x02 \x01(\tR\x04name\x12 \n" +
@@ -10445,65 +9799,53 @@ const file_main_proto_rawDesc = "" +
 	"scenarioID\x18\x05 \x01(\x05R\n" +
 	"scenarioID\x12\x16\n" +
 	"\x06format\x18\x06 \x01(\tR\x06format\x12\x1a\n" +
-	"\blocation\x18\a \x01(\tR\blocation\"%\n" +
-	"\rUpdateGameRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"\x1e\n" +
+	"\blocation\x18\a \x01(\tR\blocation\"\x0f\n" +
+	"\rUpdateGameRsp\"\x1e\n" +
 	"\fStartGameReq\x12\x0e\n" +
-	"\x02ID\x18\x01 \x01(\x05R\x02ID\"$\n" +
-	"\fStartGameRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"\x1e\n" +
+	"\x02ID\x18\x01 \x01(\x05R\x02ID\"\x0e\n" +
+	"\fStartGameRsp\"\x1e\n" +
 	"\fPauseGameReq\x12\x0e\n" +
-	"\x02ID\x18\x01 \x01(\x05R\x02ID\"$\n" +
-	"\fPauseGameRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"\x1d\n" +
+	"\x02ID\x18\x01 \x01(\x05R\x02ID\"\x0e\n" +
+	"\fPauseGameRsp\"\x1d\n" +
 	"\vPlayGameReq\x12\x0e\n" +
-	"\x02ID\x18\x01 \x01(\x05R\x02ID\"#\n" +
-	"\vPlayGameRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"\x1f\n" +
+	"\x02ID\x18\x01 \x01(\x05R\x02ID\"\r\n" +
+	"\vPlayGameRsp\"\x1f\n" +
 	"\rFinishGameReq\x12\x0e\n" +
-	"\x02ID\x18\x01 \x01(\x05R\x02ID\"%\n" +
-	"\rFinishGameRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"\x1e\n" +
+	"\x02ID\x18\x01 \x01(\x05R\x02ID\"\x0f\n" +
+	"\rFinishGameRsp\"\x1e\n" +
 	"\fResetGameReq\x12\x0e\n" +
-	"\x02ID\x18\x01 \x01(\x05R\x02ID\"$\n" +
-	"\fResetGameRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"\x1f\n" +
+	"\x02ID\x18\x01 \x01(\x05R\x02ID\"\x0e\n" +
+	"\fResetGameRsp\"\x1f\n" +
 	"\rDeleteGameReq\x12\x0e\n" +
-	"\x02ID\x18\x01 \x01(\x05R\x02ID\"%\n" +
-	"\rDeleteGameRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"]\n" +
+	"\x02ID\x18\x01 \x01(\x05R\x02ID\"\x0f\n" +
+	"\rDeleteGameRsp\"]\n" +
 	"\n" +
 	"AddTeamReq\x12\x16\n" +
 	"\x06gameID\x18\x01 \x01(\x05R\x06gameID\x12\x12\n" +
 	"\x04name\x18\x02 \x01(\tR\x04name\x12#\n" +
-	"\rcaptain_email\x18\x03 \x01(\tR\fcaptainEmail\"N\n" +
+	"\rcaptain_email\x18\x03 \x01(\tR\fcaptainEmail\"8\n" +
 	"\n" +
-	"AddTeamRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x12\x0e\n" +
-	"\x02ID\x18\x02 \x01(\x05R\x02ID\x12\x1a\n" +
-	"\bpassword\x18\x03 \x01(\tR\bpassword\"3\n" +
+	"AddTeamRsp\x12\x0e\n" +
+	"\x02ID\x18\x01 \x01(\x05R\x02ID\x12\x1a\n" +
+	"\bpassword\x18\x02 \x01(\tR\bpassword\"3\n" +
 	"\rUpdateTeamReq\x12\x0e\n" +
 	"\x02ID\x18\x01 \x01(\x05R\x02ID\x12\x12\n" +
-	"\x04name\x18\x02 \x01(\tR\x04name\"%\n" +
-	"\rUpdateTeamRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"\x1f\n" +
+	"\x04name\x18\x02 \x01(\tR\x04name\"\x0f\n" +
+	"\rUpdateTeamRsp\"\x1f\n" +
 	"\rDeleteTeamReq\x12\x0e\n" +
-	"\x02ID\x18\x01 \x01(\x03R\x02ID\"%\n" +
-	"\rDeleteTeamRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"=\n" +
+	"\x02ID\x18\x01 \x01(\x03R\x02ID\"\x0f\n" +
+	"\rDeleteTeamRsp\"=\n" +
 	"\x17GiveTeamApplicationsReq\x12\x0e\n" +
 	"\x02ID\x18\x01 \x01(\x03R\x02ID\x12\x12\n" +
-	"\x04name\x18\x02 \x01(\tR\x04name\"/\n" +
-	"\x17GiveTeamApplicationsRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"=\n" +
+	"\x04name\x18\x02 \x01(\tR\x04name\"\x19\n" +
+	"\x17GiveTeamApplicationsRsp\"=\n" +
 	"\x0fGetTeamStoryReq\x12\x0e\n" +
 	"\x02ID\x18\x01 \x01(\x03R\x02ID\x12\x1a\n" +
-	"\bpassword\x18\x02 \x01(\tR\bpassword\"\xe4\x01\n" +
-	"\x0fGetTeamStoryRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x12;\n" +
-	"\x05story\x18\x02 \x01(\v2%.crabs.evening_detective_server.StoryR\x05story\x128\n" +
-	"\x04game\x18\x03 \x01(\v2$.crabs.evening_detective_server.GameR\x04game\x12D\n" +
-	"\aactions\x18\x04 \x03(\v2*.crabs.evening_detective_server.TeamActionR\aactions\"2\n" +
+	"\bpassword\x18\x02 \x01(\tR\bpassword\"\xce\x01\n" +
+	"\x0fGetTeamStoryRsp\x12;\n" +
+	"\x05story\x18\x01 \x01(\v2%.crabs.evening_detective_server.StoryR\x05story\x128\n" +
+	"\x04game\x18\x02 \x01(\v2$.crabs.evening_detective_server.GameR\x04game\x12D\n" +
+	"\aactions\x18\x03 \x03(\v2*.crabs.evening_detective_server.TeamActionR\aactions\"2\n" +
 	"\n" +
 	"TeamAction\x12\x12\n" +
 	"\x04code\x18\x01 \x01(\tR\x04code\x12\x10\n" +
@@ -10511,58 +9853,49 @@ const file_main_proto_rawDesc = "" +
 	"\x10AddTeamActionReq\x12\x0e\n" +
 	"\x02ID\x18\x01 \x01(\x03R\x02ID\x12\x1a\n" +
 	"\bpassword\x18\x02 \x01(\tR\bpassword\x12\x12\n" +
-	"\x04code\x18\x03 \x01(\tR\x04code\"(\n" +
-	"\x10AddTeamActionRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\")\n" +
+	"\x04code\x18\x03 \x01(\tR\x04code\"\x12\n" +
+	"\x10AddTeamActionRsp\")\n" +
 	"\x17DeleteLastTeamActionReq\x12\x0e\n" +
-	"\x02ID\x18\x01 \x01(\x03R\x02ID\"/\n" +
-	"\x17DeleteLastTeamActionRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"?\n" +
+	"\x02ID\x18\x01 \x01(\x03R\x02ID\"\x19\n" +
+	"\x17DeleteLastTeamActionRsp\"?\n" +
 	"\x11GetTeamAnswersReq\x12\x0e\n" +
 	"\x02ID\x18\x01 \x01(\x03R\x02ID\x12\x1a\n" +
-	"\bpassword\x18\x02 \x01(\tR\bpassword\"k\n" +
-	"\x11GetTeamAnswersRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x12@\n" +
-	"\aanswers\x18\x02 \x03(\v2&.crabs.evening_detective_server.AnswerR\aanswers\"\x84\x01\n" +
+	"\bpassword\x18\x02 \x01(\tR\bpassword\"U\n" +
+	"\x11GetTeamAnswersRsp\x12@\n" +
+	"\aanswers\x18\x01 \x03(\v2&.crabs.evening_detective_server.AnswerR\aanswers\"\x84\x01\n" +
 	"\x14SubmitTeamAnswersReq\x12\x0e\n" +
 	"\x02ID\x18\x01 \x01(\x03R\x02ID\x12\x1a\n" +
 	"\bpassword\x18\x02 \x01(\tR\bpassword\x12@\n" +
-	"\aanswers\x18\x03 \x03(\v2&.crabs.evening_detective_server.AnswerR\aanswers\",\n" +
-	"\x14SubmitTeamAnswersRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"p\n" +
+	"\aanswers\x18\x03 \x03(\v2&.crabs.evening_detective_server.AnswerR\aanswers\"\x16\n" +
+	"\x14SubmitTeamAnswersRsp\"p\n" +
 	"\x15SetTeamAnswerScoreReq\x12\x0e\n" +
 	"\x02ID\x18\x01 \x01(\x03R\x02ID\x12\"\n" +
 	"\fquestionCode\x18\x02 \x01(\tR\fquestionCode\x12\x19\n" +
 	"\x05score\x18\x03 \x01(\x05H\x00R\x05score\x88\x01\x01B\b\n" +
-	"\x06_score\"-\n" +
-	"\x15SetTeamAnswerScoreRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"M\n" +
+	"\x06_score\"\x17\n" +
+	"\x15SetTeamAnswerScoreRsp\"M\n" +
 	"\x1bUpdateScenarioBackgroundReq\x12\x0e\n" +
 	"\x02ID\x18\x01 \x01(\x05R\x02ID\x12\x1e\n" +
 	"\n" +
 	"background\x18\x02 \x01(\tR\n" +
-	"background\"3\n" +
-	"\x1bUpdateScenarioBackgroundRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\"C\n" +
+	"background\"\x1d\n" +
+	"\x1bUpdateScenarioBackgroundRsp\"C\n" +
 	"\x13IssueGameTicketsReq\x12\x16\n" +
 	"\x06gameID\x18\x01 \x01(\x05R\x06gameID\x12\x14\n" +
-	"\x05count\x18\x02 \x01(\x05R\x05count\"m\n" +
-	"\x13IssueGameTicketsRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x12@\n" +
-	"\atickets\x18\x02 \x03(\v2&.crabs.evening_detective_server.TicketR\atickets\"*\n" +
+	"\x05count\x18\x02 \x01(\x05R\x05count\"W\n" +
+	"\x13IssueGameTicketsRsp\x12@\n" +
+	"\atickets\x18\x01 \x03(\v2&.crabs.evening_detective_server.TicketR\atickets\"*\n" +
 	"\x06Ticket\x12\x0e\n" +
 	"\x02ID\x18\x01 \x01(\x05R\x02ID\x12\x10\n" +
 	"\x03URL\x18\x02 \x01(\tR\x03URL\"$\n" +
 	"\fGetTicketReq\x12\x14\n" +
-	"\x05token\x18\x01 \x01(\tR\x05token\"h\n" +
-	"\fGetTicketRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x12B\n" +
-	"\x06ticket\x18\x02 \x01(\v2*.crabs.evening_detective_server.TicketPageR\x06ticket\"'\n" +
+	"\x05token\x18\x01 \x01(\tR\x05token\"R\n" +
+	"\fGetTicketRsp\x12B\n" +
+	"\x06ticket\x18\x01 \x01(\v2*.crabs.evening_detective_server.TicketPageR\x06ticket\"'\n" +
 	"\x0fAcceptTicketReq\x12\x14\n" +
-	"\x05token\x18\x01 \x01(\tR\x05token\"k\n" +
-	"\x0fAcceptTicketRsp\x12\x14\n" +
-	"\x05error\x18\x01 \x01(\tR\x05error\x12B\n" +
-	"\x06ticket\x18\x02 \x01(\v2*.crabs.evening_detective_server.TicketPageR\x06ticket\"\xa4\x02\n" +
+	"\x05token\x18\x01 \x01(\tR\x05token\"U\n" +
+	"\x0fAcceptTicketRsp\x12B\n" +
+	"\x06ticket\x18\x01 \x01(\v2*.crabs.evening_detective_server.TicketPageR\x06ticket\"\xa4\x02\n" +
 	"\n" +
 	"TicketPage\x12\x0e\n" +
 	"\x02ID\x18\x01 \x01(\x05R\x02ID\x12\x1b\n" +
@@ -10605,12 +9938,12 @@ const file_main_proto_rawDesc = "" +
 	"\x1aSCREEN_COMMAND_TIMER_PAUSE\x10\t\x12\x1f\n" +
 	"\x1bSCREEN_COMMAND_TIMER_RESUME\x10\n" +
 	"\x12\x1e\n" +
-	"\x1aSCREEN_COMMAND_TIMER_RESET\x10\v2\x89\xa6\x01\n" +
-	"\x16EveningDetectiveServer\x12\xcc\x05\n" +
-	"\x10GetParticipation\x123.crabs.evening_detective_server.GetParticipationReq\x1a0.crabs.evening_detective_server.ParticipationRsp\"\xd0\x04\x92A\xab\x04\n" +
-	")Подтверждение участия\x122Получить состояние участия\x1a\xc7\x03Возвращает команду, игру и текущее решение по персональному токену из письма. Авторизация JWT не требуется. Чтение не меняет статус участия. Токен передаётся в теле запроса. Недействительная ссылка и ошибки обработки возвращаются в поле error при HTTP 200.b\x00\x82\xd3\xe4\x93\x02\x1b:\x01*\"\x16/api/participation/get\x12\xf2\b\n" +
-	"\x13AnswerParticipation\x126.crabs.evening_detective_server.AnswerParticipationReq\x1a0.crabs.evening_detective_server.ParticipationRsp\"\xf0\a\x92A\xc8\a\n" +
-	")Подтверждение участия\x12=Подтвердить или отменить участие\x1a\xd9\x06Принимает окончательный ответ капитана: confirmed или cancelled. Авторизация JWT не требуется; доступ определяется персональным токеном. Первый ответ сохраняется, повтор того же ответа успешен, противоположный ответ отклоняется. Новый ответ принимается только до планового начала игры и пока игра имеет статус draft. Ошибки ссылки, значения answer, закрытого приёма или изменения решения возвращаются в поле error при HTTP 200; при уже принятом решении возвращается его текущее состояние.b\x00\x82\xd3\xe4\x93\x02\x1e:\x01*\"\x19/api/participation/answer\x12\xa6\x01\n" +
+	"\x1aSCREEN_COMMAND_TIMER_RESET\x10\v2\x97\xa6\x01\n" +
+	"\x16EveningDetectiveServer\x12\xd3\x05\n" +
+	"\x10GetParticipation\x123.crabs.evening_detective_server.GetParticipationReq\x1a0.crabs.evening_detective_server.ParticipationRsp\"\xd7\x04\x92A\xb2\x04\n" +
+	")Подтверждение участия\x122Получить состояние участия\x1a\xce\x03Возвращает команду, игру и текущее решение по персональному токену из письма. Авторизация JWT не требуется. Чтение не меняет статус участия. Токен передаётся в теле запроса. Недействительная ссылка и ошибки обработки возвращаются стандартным gRPC status error.b\x00\x82\xd3\xe4\x93\x02\x1b:\x01*\"\x16/api/participation/get\x12\xf9\b\n" +
+	"\x13AnswerParticipation\x126.crabs.evening_detective_server.AnswerParticipationReq\x1a0.crabs.evening_detective_server.ParticipationRsp\"\xf7\a\x92A\xcf\a\n" +
+	")Подтверждение участия\x12=Подтвердить или отменить участие\x1a\xe0\x06Принимает окончательный ответ капитана: confirmed или cancelled. Авторизация JWT не требуется; доступ определяется персональным токеном. Первый ответ сохраняется, повтор того же ответа успешен, противоположный ответ отклоняется. Новый ответ принимается только до планового начала игры и пока игра имеет статус draft. Ошибки ссылки, значения answer, закрытого приёма или изменения решения возвращаются стандартным gRPC status error; при уже принятом решении возвращается его текущее состояние.b\x00\x82\xd3\xe4\x93\x02\x1e:\x01*\"\x19/api/participation/answer\x12\xa6\x01\n" +
 	"\x04Ping\x12'.crabs.evening_detective_server.PingReq\x1a'.crabs.evening_detective_server.PingRsp\"L\x92A3\x12)Проверить доступностьb\x06\n" +
 	"\x04\n" +
 	"\x00\x12\x00\x82\xd3\xe4\x93\x02\x10\x12\x0e/api/test/ping\x12\xaf\x01\n" +