Add td_api::canBotSendMessages.

td/generate/scheme/td_api.tl

@@ -8214,6 +8214,10 @@ setDefaultGroupAdministratorRights default_group_administrator_rights:chatAdmini
 setDefaultChannelAdministratorRights default_channel_administrator_rights:chatAdministratorRights = Ok;
 
 
+//@description Checks whether the specified bot can send messages to the user. Returns a 404 error if can't and the access can be granted by call to allowBotToSendMessages @bot_user_id Identifier of the target bot
+canBotSendMessages bot_user_id:int53 = Ok;
+
+
 //@description Sets the name of a bot. Can be called only if userTypeBot.can_be_edited == true
 //@bot_user_id Identifier of the target bot
 //@language_code A two-letter ISO 639-1 language code. If empty, the name will be shown to all users for whose languages there is no dedicated name

td/telegram/BotInfoManager.cpp

@@ -89,6 +89,40 @@ class SetBotBroadcastDefaultAdminRightsQuery final : public Td::ResultHandler {
   }
 };
 
+class CanBotSendMessageQuery final : public Td::ResultHandler {
+  Promise<Unit> promise_;
+
+ public:
+  explicit CanBotSendMessageQuery(Promise<Unit> &&promise) : promise_(std::move(promise)) {
+  }
+
+  void send(UserId bot_user_id) {
+    auto r_input_user = td_->contacts_manager_->get_input_user(bot_user_id);
+    if (r_input_user.is_error()) {
+      return on_error(r_input_user.move_as_error());
+    }
+    send_query(
+        G()->net_query_creator().create(telegram_api::bots_canSendMessage(r_input_user.move_as_ok()), {{bot_user_id}}));
+  }
+
+  void on_result(BufferSlice packet) final {
+    auto result_ptr = fetch_result<telegram_api::bots_canSendMessage>(packet);
+    if (result_ptr.is_error()) {
+      return on_error(result_ptr.move_as_error());
+    }
+
+    if (result_ptr.ok()) {
+      promise_.set_value(Unit());
+    } else {
+      promise_.set_error(Status::Error(404, "Not Found"));
+    }
+  }
+
+  void on_error(Status status) final {
+    promise_.set_error(std::move(status));
+  }
+};
+
 static Result<telegram_api::object_ptr<telegram_api::InputUser>> get_bot_input_user(const Td *td, UserId bot_user_id) {
   if (td->auth_manager_->is_bot()) {
     if (bot_user_id != UserId() && bot_user_id != td->contacts_manager_->get_my_id()) {
@@ -317,6 +351,10 @@ void BotInfoManager::set_default_channel_administrator_rights(AdministratorRight
   td_->create_handler<SetBotBroadcastDefaultAdminRightsQuery>(std::move(promise))->send(administrator_rights);
 }
 
+void BotInfoManager::can_bot_send_messages(UserId bot_user_id, Promise<Unit> &&promise) {
+  td_->create_handler<CanBotSendMessageQuery>(std::move(promise))->send(bot_user_id);
+}
+
 void BotInfoManager::add_pending_set_query(UserId bot_user_id, const string &language_code, int type,
                                            const string &value, Promise<Unit> &&promise) {
   pending_set_bot_info_queries_.emplace_back(bot_user_id, language_code, type, value, std::move(promise));

td/telegram/BotInfoManager.h

@@ -26,6 +26,8 @@ class BotInfoManager final : public Actor {
 
   void set_default_channel_administrator_rights(AdministratorRights administrator_rights, Promise<Unit> &&promise);
 
+  void can_bot_send_messages(UserId bot_user_id, Promise<Unit> &&promise);
+
   void set_bot_name(UserId bot_user_id, const string &language_code, const string &name, Promise<Unit> &&promise);
 
   void get_bot_name(UserId bot_user_id, const string &language_code, Promise<string> &&promise);

td/telegram/Td.cpp

@@ -7307,6 +7307,11 @@ void Td::on_request(uint64 id, const td_api::setDefaultChannelAdministratorRight
       AdministratorRights(request.default_channel_administrator_rights_, ChannelType::Broadcast), std::move(promise));
 }
 
+void Td::on_request(uint64 id, const td_api::canBotSendMessages &request) {
+  CREATE_OK_REQUEST_PROMISE();
+  bot_info_manager_->can_bot_send_messages(UserId(request.bot_user_id_), std::move(promise));
+}
+
 void Td::on_request(uint64 id, td_api::setBotName &request) {
   CLEAN_INPUT_STRING(request.name_);
   CREATE_OK_REQUEST_PROMISE();

td/telegram/Td.h

@@ -1221,6 +1221,8 @@ class Td final : public Actor {
 
   void on_request(uint64 id, const td_api::setDefaultChannelAdministratorRights &request);
 
+  void on_request(uint64 id, const td_api::canBotSendMessages &request);
+
   void on_request(uint64 id, td_api::setBotName &request);
 
   void on_request(uint64 id, const td_api::getBotName &request);

td/telegram/cli.cpp

@@ -5510,6 +5510,10 @@ class CliClient final : public Actor {
       InputChatPhoto input_chat_photo;
       get_args(args, user_id, input_chat_photo);
       send_request(td_api::make_object<td_api::suggestUserProfilePhoto>(user_id, input_chat_photo));
+    } else if (op == "cbsm") {
+      UserId bot_user_id;
+      get_args(args, bot_user_id);
+      send_request(td_api::make_object<td_api::canBotSendMessages>(bot_user_id));
     } else if (op == "gbi") {
       UserId bot_user_id;
       string language_code;