diff --git a/CMakeLists.txt b/CMakeLists.txt
index 45de0b3..9af6665 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,12 @@
 cmake_minimum_required(VERSION 3.0.2 FATAL_ERROR)
 
-project(TelegramBotApi VERSION 5.2 LANGUAGES CXX)
+if (POLICY CMP0065)
+  # do not export symbols from executables
+  # affects compiler checks in project(), so must be set before it
+  cmake_policy(SET CMP0065 NEW)
+endif()
+
+project(TelegramBotApi VERSION 5.3 LANGUAGES CXX)
 
 add_subdirectory(td EXCLUDE_FROM_ALL)
 
diff --git a/build.html b/build.html
index facbd02..f80af61 100644
--- a/build.html
+++ b/build.html
@@ -121,7 +121,7 @@ function onLoad(initial) {
 function onOsChanged(initial) {
   var os = document.getElementById('osSelect').value;
   if (os.includes('Choose ')) {
-    if (history.state != '') {
+    if (history.state !== '' && history.state !== null) {
       history.pushState('', '', 'build.html');
     }
 
diff --git a/td b/td
index 49fd5cb..1ea79d2 160000
--- a/td
+++ b/td
@@ -1 +1 @@
-Subproject commit 49fd5cbd874601da8a9ff0083894d7104a4e8680
+Subproject commit 1ea79d273976c22655742d4031ebbe62dba6cd7c
diff --git a/telegram-bot-api/Client.cpp b/telegram-bot-api/Client.cpp
index 813e8e7..0043075 100644
--- a/telegram-bot-api/Client.cpp
+++ b/telegram-bot-api/Client.cpp
@@ -25,6 +25,7 @@
 #include "td/utils/port/Stat.h"
 #include "td/utils/Random.h"
 #include "td/utils/Slice.h"
+#include "td/utils/SliceBuilder.h"
 #include "td/utils/Span.h"
 #include "td/utils/StackAllocator.h"
 #include "td/utils/Status.h"
@@ -75,6 +76,10 @@ void Client::fail_query_with_error(PromisedQueryPtr query, int32 error_code, Sli
   int32 real_error_code = error_code;
   Slice real_error_message = error_message;
   if (error_code < 300 || error_code == 404) {
+    if (error_code <= 0) {
+      LOG(ERROR) << "Receive error \"" << real_error_message << "\" with code " << error_code << " from " << *query;
+    }
+
     error_code = 400;
   }
   if (error_code == 400) {
@@ -197,6 +202,7 @@ bool Client::init_methods() {
   methods_.emplace("getme", &Client::process_get_me_query);
   methods_.emplace("getmycommands", &Client::process_get_my_commands_query);
   methods_.emplace("setmycommands", &Client::process_set_my_commands_query);
+  methods_.emplace("deletemycommands", &Client::process_delete_my_commands_query);
   methods_.emplace("getuserprofilephotos", &Client::process_get_user_profile_photos_query);
   methods_.emplace("sendmessage", &Client::process_send_message_query);
   methods_.emplace("sendanimation", &Client::process_send_animation_query);
@@ -336,7 +342,7 @@ class Client::JsonDatedFile : public Jsonable {
 
 class Client::JsonDatedFiles : public Jsonable {
  public:
-  JsonDatedFiles(const td::vector<td_api::object_ptr<td_api::datedFile>> &files, const Client *client)
+  JsonDatedFiles(const td::vector<object_ptr<td_api::datedFile>> &files, const Client *client)
       : files_(files), client_(client) {
   }
   void store(JsonValueScope *scope) const {
@@ -347,7 +353,7 @@ class Client::JsonDatedFiles : public Jsonable {
   }
 
  private:
-  const td::vector<td_api::object_ptr<td_api::datedFile>> &files_;
+  const td::vector<object_ptr<td_api::datedFile>> &files_;
   const Client *client_;
 };
 
@@ -1592,7 +1598,7 @@ class Client::JsonInlineKeyboardButton : public Jsonable {
       case td_api::inlineKeyboardButtonTypeCallbackWithPassword::ID: {
         auto data = get_callback_data(button_->type_);
         if (!td::check_utf8(data)) {
-          object("callback_data", td::JsonRawString(data));
+          object("callback_data", "INVALID");
         } else {
           object("callback_data", data);
         }
@@ -2398,6 +2404,7 @@ class Client::JsonChatMembers : public Jsonable {
         continue;
       }
       auto user_id = static_cast<const td_api::messageSenderUser *>(member->member_id_.get())->user_id_;
+      /*
       bool is_member_bot = member->bot_info_ != nullptr;
       if (!is_member_bot) {
         // bot info may be unknown
@@ -2406,7 +2413,7 @@ class Client::JsonChatMembers : public Jsonable {
           is_member_bot = true;
         }
       }
-      /*
+
       if (is_member_bot && user_id != client_->my_id_) {
         continue;
       }
@@ -3470,13 +3477,9 @@ class Client::TdOnGetMyCommandsCallback : public TdQueryCallback {
       return fail_query_with_error(std::move(query_), move_object_as<td_api::error>(result));
     }
 
-    CHECK(result->get_id() == td_api::userFullInfo::ID);
-    auto user_full_info = move_object_as<td_api::userFullInfo>(result);
-    td::vector<object_ptr<td_api::botCommand>> commands;
-    if (user_full_info->bot_info_ != nullptr) {
-      commands = std::move(user_full_info->bot_info_->commands_);
-    }
-    answer_query(td::json_array(commands, [](auto &command) { return JsonBotCommand(command.get()); }),
+    CHECK(result->get_id() == td_api::botCommands::ID);
+    auto bot_commands = move_object_as<td_api::botCommands>(result);
+    answer_query(td::json_array(bot_commands->commands_, [](auto &command) { return JsonBotCommand(command.get()); }),
                  std::move(query_));
   }
 
@@ -3960,18 +3963,14 @@ void Client::start_up() {
   CHECK(r_absolute_dir.is_ok());
   absolute_dir_ = r_absolute_dir.move_as_ok();
   auto suff = bot_token_with_dc_ + TD_DIR_SLASH;
-#if TD_PORT_WINDOWS
-  for (auto &c : suff) {
-    if (c == ':') {
-      c = '~';
+  if (!parameters_->allow_colon_in_filenames_) {
+    for (auto &c : suff) {
+      if (c == ':') {
+        c = '~';
+      }
     }
   }
-#endif
-  dir_ = td::string(".") + TD_DIR_SLASH + suff;
-  if (absolute_dir_.back() != TD_DIR_SLASH) {
-    absolute_dir_ += TD_DIR_SLASH;
-  }
-  absolute_dir_ += suff;
+  dir_ = parameters_->working_directory_ + suff;
 
   class TdCallback : public td::TdCallback {
    public:
@@ -3995,10 +3994,7 @@ void Client::start_up() {
 
 void Client::send(PromisedQueryPtr query) {
   if (!query->is_internal()) {
-    send_closure(
-        stat_actor_, &BotStatActor::add_event<ServerBotStat::Request>,
-        ServerBotStat::Request{query->query_size(), query->file_count(), query->files_size(), query->files_max_size()},
-        td::Time::now());
+    query->set_stat_actor(stat_actor_);
   }
   cmd_queue_.emplace(std::move(query));
   loop();
@@ -4174,6 +4170,10 @@ void Client::check_chat_access(int64 chat_id, AccessRights access_rights, const
       break;
     }
     case ChatInfo::Type::Group: {
+      if (access_rights == AccessRights::ReadMembers) {  // member list is inaccessible in deactivated groups
+        need_write_access = true;
+        need_edit_access = true;
+      }
       auto group_info = get_group_info(chat_info->group_id);
       CHECK(group_info != nullptr);
       if (!group_info->is_active && need_write_access) {
@@ -4184,9 +4184,7 @@ void Client::check_chat_access(int64 chat_id, AccessRights access_rights, const
           return fail_query(400, "Bad Request: group chat was upgraded to a supergroup chat", std::move(query),
                             std::move(parameters));
         } else {
-          LOG(WARNING) << "Group chat " << chat_info->group_id << " with " << group_info->member_count
-                       << " members and title \"" << chat_info->title << "\" is deactivated";
-          return fail_query(400, "Bad Request: group chat was deactivated", std::move(query));
+          return fail_query(403, "Forbidden: the group chat was deleted", std::move(query));
         }
       }
       if (group_info->is_active && group_info->kicked && need_edit_access) {
@@ -4247,6 +4245,36 @@ void Client::check_chat(Slice chat_id_str, AccessRights access_rights, PromisedQ
                                                                   std::move(on_success)));
 }
 
+template <class OnSuccess>
+void Client::check_bot_command_scope(BotCommandScope &&scope, PromisedQueryPtr query, OnSuccess on_success) {
+  CHECK(scope.scope_ != nullptr);
+  if (scope.chat_id_.empty()) {
+    on_success(std::move(scope.scope_), std::move(query));
+    return;
+  }
+  check_chat(scope.chat_id_, AccessRights::ReadMembers, std::move(query),
+             [this, user_id = scope.user_id_, scope_id = scope.scope_->get_id(), on_success = std::move(on_success)](
+                 int64 chat_id, PromisedQueryPtr query) mutable {
+               switch (scope_id) {
+                 case td_api::botCommandScopeChat::ID:
+                   on_success(make_object<td_api::botCommandScopeChat>(chat_id), std::move(query));
+                   break;
+                 case td_api::botCommandScopeChatAdministrators::ID:
+                   on_success(make_object<td_api::botCommandScopeChatAdministrators>(chat_id), std::move(query));
+                   break;
+                 case td_api::botCommandScopeChatMember::ID:
+                   check_user_no_fail(
+                       user_id, std::move(query),
+                       [chat_id, user_id, on_success = std::move(on_success)](PromisedQueryPtr query) mutable {
+                         on_success(make_object<td_api::botCommandScopeChatMember>(chat_id, user_id), std::move(query));
+                       });
+                   break;
+                 default:
+                   UNREACHABLE();
+               }
+             });
+}
+
 template <class OnSuccess>
 void Client::check_remote_file_id(td::string file_id, PromisedQueryPtr query, OnSuccess on_success) {
   if (file_id.empty()) {
@@ -4577,6 +4605,8 @@ void Client::on_update_authorization_state() {
     case td_api::authorizationStateWaitEncryptionKey::ID:
       return send_request(make_object<td_api::checkDatabaseEncryptionKey>(), std::make_unique<TdOnInitCallback>(this));
     case td_api::authorizationStateWaitPhoneNumber::ID:
+      send_request(make_object<td_api::setOption>("online", make_object<td_api::optionValueBoolean>(true)),
+                 std::make_unique<TdOnOkCallback>());
       if (is_user_) {
         waiting_for_auth_input_ = true;
         return loop();
@@ -5009,8 +5039,8 @@ void Client::on_closed() {
       td::ActorId<Client> parent_;
 
       void start_up() override {
-        CHECK(!dir_.empty());
-        CHECK(dir_[0] == '.');
+        CHECK(dir_.size() >= 24);
+        CHECK(dir_.back() == TD_DIR_SLASH);
         td::rmrf(dir_).ignore();
         stop();
       }
@@ -5214,6 +5244,7 @@ td::Result<td_api::object_ptr<td_api::ReplyMarkup>> Client::get_reply_markup(con
 td::Result<td_api::object_ptr<td_api::ReplyMarkup>> Client::get_reply_markup(JsonValue &&value) {
   td::vector<td::vector<object_ptr<td_api::keyboardButton>>> rows;
   td::vector<td::vector<object_ptr<td_api::inlineKeyboardButton>>> inline_rows;
+  Slice input_field_placeholder;
   bool resize = false;
   bool one_time = false;
   bool remove = false;
@@ -5289,18 +5320,24 @@ td::Result<td_api::object_ptr<td_api::ReplyMarkup>> Client::get_reply_markup(Jso
         return Status::Error(400, "Field \"force_reply\" of the reply markup must be of the type Boolean");
       }
       force_reply = field_value.second.get_boolean();
+    } else if (field_value.first == "input_field_placeholder") {
+      if (field_value.second.type() != JsonValue::Type::String) {
+        return Status::Error(400, "Field \"input_field_placeholder\" of the reply markup must be of the type String");
+      }
+      input_field_placeholder = field_value.second.get_string();
     }
   }
 
   object_ptr<td_api::ReplyMarkup> result;
   if (!rows.empty()) {
-    result = make_object<td_api::replyMarkupShowKeyboard>(std::move(rows), resize, one_time, is_personal);
+    result = make_object<td_api::replyMarkupShowKeyboard>(std::move(rows), resize, one_time, is_personal,
+                                                          input_field_placeholder.str());
   } else if (!inline_rows.empty()) {
     result = make_object<td_api::replyMarkupInlineKeyboard>(std::move(inline_rows));
   } else if (remove) {
     result = make_object<td_api::replyMarkupRemoveKeyboard>(is_personal);
   } else if (force_reply) {
-    result = make_object<td_api::replyMarkupForceReply>(is_personal);
+    result = make_object<td_api::replyMarkupForceReply>(is_personal, input_field_placeholder.str());
   }
   if (result == nullptr || result->get_id() != td_api::replyMarkupInlineKeyboard::ID) {
     unresolved_bot_usernames_.clear();
@@ -5970,6 +6007,69 @@ td::Result<td_api::object_ptr<td_api::InputInlineQueryResult>> Client::get_inlin
   return Status::Error(400, PSLICE() << "type \"" << type << "\" is unsupported for the inline query result");
 }
 
+td::Result<Client::BotCommandScope> Client::get_bot_command_scope(JsonValue &&value) {
+  if (value.type() != JsonValue::Type::Object) {
+    return Status::Error(400, "BotCommandScope must be an Object");
+  }
+
+  auto &object = value.get_object();
+
+  TRY_RESULT(type, get_json_object_string_field(object, "type", false));
+  if (type == "default") {
+    return BotCommandScope(make_object<td_api::botCommandScopeDefault>());
+  }
+  if (type == "all_private_chats") {
+    return BotCommandScope(make_object<td_api::botCommandScopeAllPrivateChats>());
+  }
+  if (type == "all_group_chats") {
+    return BotCommandScope(make_object<td_api::botCommandScopeAllGroupChats>());
+  }
+  if (type == "all_chat_administrators") {
+    return BotCommandScope(make_object<td_api::botCommandScopeAllChatAdministrators>());
+  }
+  if (type != "chat" && type != "chat_administrators" && type != "chat_member") {
+    return Status::Error(400, "Unsupported type specified");
+  }
+
+  TRY_RESULT(chat_id, get_json_object_string_field(object, "chat_id", false));
+  if (chat_id.empty()) {
+    return Status::Error(400, "Empty chat_id specified");
+  }
+  if (type == "chat") {
+    return BotCommandScope(make_object<td_api::botCommandScopeChat>(0), std::move(chat_id));
+  }
+  if (type == "chat_administrators") {
+    return BotCommandScope(make_object<td_api::botCommandScopeChatAdministrators>(0), std::move(chat_id));
+  }
+
+  TRY_RESULT(user_id, get_json_object_int_field(object, "user_id", false));
+  if (user_id <= 0) {
+    return Status::Error(400, "Invalid user_id specified");
+  }
+  CHECK(type == "chat_member");
+  return BotCommandScope(make_object<td_api::botCommandScopeChatMember>(0, user_id), std::move(chat_id), user_id);
+}
+
+td::Result<Client::BotCommandScope> Client::get_bot_command_scope(const Query *query) {
+  auto scope = query->arg("scope");
+  if (scope.empty()) {
+    return BotCommandScope(make_object<td_api::botCommandScopeDefault>());
+  }
+
+  LOG(INFO) << "Parsing JSON object: " << scope;
+  auto r_value = json_decode(scope);
+  if (r_value.is_error()) {
+    LOG(INFO) << "Can't parse JSON object: " << r_value.error();
+    return Status::Error(400, "Can't parse BotCommandScope JSON object");
+  }
+
+  auto r_scope = get_bot_command_scope(r_value.move_as_ok());
+  if (r_scope.is_error()) {
+    return Status::Error(400, PSLICE() << "Can't parse BotCommandScope: " << r_scope.error().message());
+  }
+  return r_scope.move_as_ok();
+}
+
 td::Result<td_api::object_ptr<td_api::botCommand>> Client::get_bot_command(JsonValue &&value) {
   if (value.type() != JsonValue::Type::Object) {
     return Status::Error(400, "expected an Object");
@@ -6604,11 +6704,8 @@ td::Result<td::vector<td::string>> Client::get_poll_options(const Query *query)
 td::int32 Client::get_integer_arg(const Query *query, Slice field_name, int32 default_value, int32 min_value,
                                   int32 max_value) {
   auto s_arg = query->arg(field_name);
-  if (s_arg.empty()) {
-    return default_value;
-  }
-
-  return td::clamp(td::to_integer<int32>(s_arg), min_value, max_value);
+  auto value = s_arg.empty() ? default_value : td::to_integer<int32>(s_arg);
+  return td::clamp(value, min_value, max_value);
 }
 
 td::Result<td::MutableSlice> Client::get_required_string_arg(const Query *query, Slice field_name) {
@@ -6922,16 +7019,42 @@ td::Status Client::process_get_me_query(PromisedQueryPtr &query) {
 }
 
 td::Status Client::process_get_my_commands_query(PromisedQueryPtr &query) {
-  send_request(make_object<td_api::getUserFullInfo>(my_id_),
-               std::make_unique<TdOnGetMyCommandsCallback>(std::move(query)));
+  TRY_RESULT(scope, get_bot_command_scope(query.get()));
+
+  check_bot_command_scope(std::move(scope), std::move(query),
+                          [this](object_ptr<td_api::BotCommandScope> &&scope, PromisedQueryPtr query) mutable {
+                            auto language_code = query->arg("language_code").str();
+                            send_request(make_object<td_api::getCommands>(std::move(scope), language_code),
+                                         std::make_unique<TdOnGetMyCommandsCallback>(std::move(query)));
+                          });
   return Status::OK();
 }
 
 td::Status Client::process_set_my_commands_query(PromisedQueryPtr &query) {
   CHECK_IS_BOT();
   TRY_RESULT(bot_commands, get_bot_commands(query.get()));
-  send_request(make_object<td_api::setCommands>(std::move(bot_commands)),
-               std::make_unique<TdOnOkQueryCallback>(std::move(query)));
+  TRY_RESULT(scope, get_bot_command_scope(query.get()));
+
+  check_bot_command_scope(
+      std::move(scope), std::move(query),
+      [this, bot_commands = std::move(bot_commands)](object_ptr<td_api::BotCommandScope> &&scope,
+                                                     PromisedQueryPtr query) mutable {
+        auto language_code = query->arg("language_code").str();
+        send_request(make_object<td_api::setCommands>(std::move(scope), language_code, std::move(bot_commands)),
+                     std::make_unique<TdOnOkQueryCallback>(std::move(query)));
+      });
+  return Status::OK();
+}
+
+td::Status Client::process_delete_my_commands_query(PromisedQueryPtr &query) {
+  TRY_RESULT(scope, get_bot_command_scope(query.get()));
+
+  check_bot_command_scope(std::move(scope), std::move(query),
+                          [this](object_ptr<td_api::BotCommandScope> &&scope, PromisedQueryPtr query) mutable {
+                            auto language_code = query->arg("language_code").str();
+                            send_request(make_object<td_api::deleteCommands>(std::move(scope), language_code),
+                                         std::make_unique<TdOnOkQueryCallback>(std::move(query)));
+                          });
   return Status::OK();
 }
 
@@ -7258,7 +7381,7 @@ td::Status Client::process_copy_message_query(PromisedQueryPtr &query) {
   TRY_RESULT(from_chat_id, get_required_string_arg(query.get(), "from_chat_id"));
   auto message_id = get_message_id(query.get());
   bool replace_caption = query->has_arg("caption");
-  td_api::object_ptr<td_api::formattedText> caption;
+  object_ptr<td_api::formattedText> caption;
   if (replace_caption) {
     TRY_RESULT_ASSIGN(caption, get_caption(query.get()));
   }
@@ -7887,31 +8010,29 @@ td::Status Client::process_get_chat_member_query(PromisedQueryPtr &query) {
   auto chat_id = query->arg("chat_id");
   TRY_RESULT(user_id, get_user_id(query.get()));
 
-  check_chat(chat_id, AccessRights::Read, std::move(query), [this, user_id](int64 chat_id, PromisedQueryPtr query) {
-    get_chat_member(chat_id, user_id, std::move(query),
-                    [this, chat_type = get_chat_type(chat_id)](td_api::object_ptr<td_api::chatMember> &&chat_member,
-                                                               PromisedQueryPtr query) {
-                      answer_query(JsonChatMember(chat_member.get(), chat_type, this), std::move(query));
-                    });
-  });
+  check_chat(chat_id, AccessRights::ReadMembers, std::move(query),
+             [this, user_id](int64 chat_id, PromisedQueryPtr query) {
+               get_chat_member(chat_id, user_id, std::move(query),
+                               [this, chat_type = get_chat_type(chat_id)](object_ptr<td_api::chatMember> &&chat_member,
+                                                                          PromisedQueryPtr query) {
+                                 answer_query(JsonChatMember(chat_member.get(), chat_type, this), std::move(query));
+                               });
+             });
   return Status::OK();
 }
 
 td::Status Client::process_get_chat_administrators_query(PromisedQueryPtr &query) {
   auto chat_id = query->arg("chat_id");
 
-  check_chat(chat_id, AccessRights::Read, std::move(query), [this](int64 chat_id, PromisedQueryPtr query) {
+  check_chat(chat_id, AccessRights::ReadMembers, std::move(query), [this](int64 chat_id, PromisedQueryPtr query) {
     auto chat_info = get_chat(chat_id);
     CHECK(chat_info != nullptr);
     switch (chat_info->type) {
       case ChatInfo::Type::Private:
         return fail_query(400, "Bad Request: there are no administrators in the private chat", std::move(query));
-      case ChatInfo::Type::Group: {
-        auto group_info = get_group_info(chat_info->group_id);
-        CHECK(group_info != nullptr);
+      case ChatInfo::Type::Group:
         return send_request(make_object<td_api::getBasicGroupFullInfo>(chat_info->group_id),
                             std::make_unique<TdOnGetGroupMembersCallback>(this, true, std::move(query)));
-      }
       case ChatInfo::Type::Supergroup:
         return send_request(
             make_object<td_api::getSupergroupMembers>(
@@ -7928,7 +8049,7 @@ td::Status Client::process_get_chat_administrators_query(PromisedQueryPtr &query
 td::Status Client::process_get_chat_member_count_query(PromisedQueryPtr &query) {
   auto chat_id = query->arg("chat_id");
 
-  check_chat(chat_id, AccessRights::Read, std::move(query), [this](int64 chat_id, PromisedQueryPtr query) {
+  check_chat(chat_id, AccessRights::ReadMembers, std::move(query), [this](int64 chat_id, PromisedQueryPtr query) {
     auto chat_info = get_chat(chat_id);
     CHECK(chat_info != nullptr);
     switch (chat_info->type) {
@@ -7937,9 +8058,6 @@ td::Status Client::process_get_chat_member_count_query(PromisedQueryPtr &query)
       case ChatInfo::Type::Group: {
         auto group_info = get_group_info(chat_info->group_id);
         CHECK(group_info != nullptr);
-        if (group_info->member_count == 0) {
-          return fail_query(403, "Forbidden: bot is not a member of the group chat", std::move(query));
-        }
         return answer_query(td::VirtuallyJsonableInt(group_info->member_count), std::move(query));
       }
       case ChatInfo::Type::Supergroup:
@@ -8016,8 +8134,8 @@ td::Status Client::process_promote_chat_member_query(PromisedQueryPtr &query) {
 
                get_chat_member(
                    chat_id, user_id, std::move(query),
-                   [this, chat_id, user_id, status = std::move(status)](
-                       td_api::object_ptr<td_api::chatMember> &&chat_member, PromisedQueryPtr query) mutable {
+                   [this, chat_id, user_id, status = std::move(status)](object_ptr<td_api::chatMember> &&chat_member,
+                                                                        PromisedQueryPtr query) mutable {
                      if (chat_member->status_->get_id() == td_api::chatMemberStatusAdministrator::ID) {
                        auto administrator =
                            static_cast<const td_api::chatMemberStatusAdministrator *>(chat_member->status_.get());
@@ -8044,7 +8162,7 @@ td::Status Client::process_set_chat_administrator_custom_title_query(PromisedQue
 
     get_chat_member(
         chat_id, user_id, std::move(query),
-        [this, chat_id, user_id](td_api::object_ptr<td_api::chatMember> &&chat_member, PromisedQueryPtr query) {
+        [this, chat_id, user_id](object_ptr<td_api::chatMember> &&chat_member, PromisedQueryPtr query) {
           if (chat_member->status_->get_id() == td_api::chatMemberStatusCreator::ID) {
             return fail_query(400, "Bad Request: only creator can edit their custom title", std::move(query));
           }
@@ -8102,7 +8220,7 @@ td::Status Client::process_restrict_chat_member_query(PromisedQueryPtr &query) {
                get_chat_member(
                    chat_id, user_id, std::move(query),
                    [this, chat_id, user_id, until_date, is_legacy, permissions = std::move(permissions)](
-                       td_api::object_ptr<td_api::chatMember> &&chat_member, PromisedQueryPtr query) mutable {
+                       object_ptr<td_api::chatMember> &&chat_member, PromisedQueryPtr query) mutable {
                      if (is_legacy && chat_member->status_->get_id() == td_api::chatMemberStatusRestricted::ID) {
                        auto restricted =
                            static_cast<const td_api::chatMemberStatusRestricted *>(chat_member->status_.get());
@@ -8138,18 +8256,18 @@ td::Status Client::process_unban_chat_member_query(PromisedQueryPtr &query) {
                }
 
                if (only_if_banned) {
-                 get_chat_member(chat_id, user_id, std::move(query),
-                                 [this, chat_id, user_id](td_api::object_ptr<td_api::chatMember> &&chat_member,
-                                                          PromisedQueryPtr query) {
-                                   if (chat_member->status_->get_id() != td_api::chatMemberStatusBanned::ID) {
-                                     return answer_query(td::JsonTrue(), std::move(query));
-                                   }
+                 get_chat_member(
+                     chat_id, user_id, std::move(query),
+                     [this, chat_id, user_id](object_ptr<td_api::chatMember> &&chat_member, PromisedQueryPtr query) {
+                       if (chat_member->status_->get_id() != td_api::chatMemberStatusBanned::ID) {
+                         return answer_query(td::JsonTrue(), std::move(query));
+                       }
 
-                                   send_request(make_object<td_api::setChatMemberStatus>(
-                                                    chat_id, td_api::make_object<td_api::messageSenderUser>(user_id),
-                                                    make_object<td_api::chatMemberStatusLeft>()),
-                                                std::make_unique<TdOnOkQueryCallback>(std::move(query)));
-                                 });
+                       send_request(make_object<td_api::setChatMemberStatus>(
+                                        chat_id, td_api::make_object<td_api::messageSenderUser>(user_id),
+                                        make_object<td_api::chatMemberStatusLeft>()),
+                                    std::make_unique<TdOnOkQueryCallback>(std::move(query)));
+                     });
                } else {
                  check_user_no_fail(user_id, std::move(query), [this, chat_id, user_id](PromisedQueryPtr query) {
                    send_request(make_object<td_api::setChatMemberStatus>(
@@ -8181,7 +8299,8 @@ td::Status Client::process_upload_sticker_file_query(PromisedQueryPtr &query) {
 
   check_user(user_id, std::move(query),
              [this, user_id, png_sticker = std::move(png_sticker)](PromisedQueryPtr query) mutable {
-               send_request(make_object<td_api::uploadStickerFile>(user_id, std::move(png_sticker)),
+               send_request(make_object<td_api::uploadStickerFile>(
+                                user_id, make_object<td_api::inputStickerStatic>(std::move(png_sticker), "", nullptr)),
                             std::make_unique<TdOnReturnFileCallback>(this, std::move(query)));
              });
   return Status::OK();
@@ -8198,7 +8317,7 @@ td::Status Client::process_create_new_sticker_set_query(PromisedQueryPtr &query)
   check_user(user_id, std::move(query),
              [this, user_id, title, name, is_masks, stickers = std::move(stickers)](PromisedQueryPtr query) mutable {
                send_request(make_object<td_api::createNewStickerSet>(user_id, title.str(), name.str(), is_masks,
-                                                                     std::move(stickers)),
+                                                                     std::move(stickers), PSTRING() << "bot" << my_id_),
                             std::make_unique<TdOnReturnStickerSetCallback>(this, false, std::move(query)));
              });
   return Status::OK();
@@ -8317,7 +8436,7 @@ td::Status Client::process_set_webhook_query(PromisedQueryPtr &query) {
   }
 
   auto now = td::Time::now_cached();
-  if (!new_url.empty()) {
+  if (!new_url.empty() && !query->is_internal()) {
     if (now < next_allowed_set_webhook_time_) {
       query->set_retry_after_error(1);
       return Status::OK();
@@ -8808,7 +8927,7 @@ void Client::do_get_file(object_ptr<td_api::file> file, PromisedQueryPtr query)
   auto file_id = file->id_;
   file_download_listeners_[file_id].push_back(std::move(query));
   if (file->local_->is_downloading_completed_) {
-    Slice relative_path = td::PathView::relative(file->local_->path_, absolute_dir_, true);
+    Slice relative_path = td::PathView::relative(file->local_->path_, dir_, true);
     if (!relative_path.empty()) {
       auto r_stat = td::stat(file->local_->path_);
       if (r_stat.is_ok() && r_stat.ok().is_reg_ && r_stat.ok().size_ == file->size_) {
@@ -9463,7 +9582,7 @@ void Client::json_store_file(td::JsonObjectScope &object, const td_api::file *fi
         object("file_path", td::JsonRawString(file->local_->path_));
       }
     } else {
-      Slice relative_path = td::PathView::relative(file->local_->path_, absolute_dir_, true);
+      Slice relative_path = td::PathView::relative(file->local_->path_, dir_, true);
       if (!relative_path.empty() && (parameters_->local_mode_ || parameters_->no_file_limit_ || file->local_->downloaded_size_ <= MAX_DOWNLOAD_FILE_SIZE)) {
         object("file_path", relative_path);
       }
diff --git a/telegram-bot-api/Client.h b/telegram-bot-api/Client.h
index 89c853c..93023da 100644
--- a/telegram-bot-api/Client.h
+++ b/telegram-bot-api/Client.h
@@ -237,8 +237,9 @@ class Client : public WebhookActor::Callback {
 
   struct UserInfo;
   struct ChatInfo;
+  struct BotCommandScope;
 
-  enum class AccessRights { Read, Edit, Write };
+  enum class AccessRights { Read, ReadMembers, Edit, Write };
 
   template <class OnSuccess>
   class TdOnCheckUserCallback;
@@ -288,6 +289,9 @@ class Client : public WebhookActor::Callback {
 
   void enable_internet_connection(PromisedQueryPtr query);
 
+  template <class OnSuccess>
+  void check_bot_command_scope(BotCommandScope &&scope, PromisedQueryPtr query, OnSuccess on_success);
+
   template <class OnSuccess>
   void check_remote_file_id(td::string file_id, PromisedQueryPtr query, OnSuccess on_success);
 
@@ -370,6 +374,21 @@ class Client : public WebhookActor::Callback {
 
   td::Result<td::vector<object_ptr<td_api::InputInlineQueryResult>>> get_inline_query_results(td::JsonValue &&value);
 
+  struct BotCommandScope {
+    object_ptr<td_api::BotCommandScope> scope_;
+    td::string chat_id_;
+    td::int32 user_id_ = 0;
+
+    explicit BotCommandScope(object_ptr<td_api::BotCommandScope> scope, td::string chat_id = td::string(),
+                             td::int32 user_id = 0)
+        : scope_(std::move(scope)), chat_id_(std::move(chat_id)), user_id_(user_id) {
+    }
+  };
+
+  static td::Result<BotCommandScope> get_bot_command_scope(const Query *query);
+
+  static td::Result<BotCommandScope> get_bot_command_scope(td::JsonValue &&value);
+
   static td::Result<object_ptr<td_api::botCommand>> get_bot_command(td::JsonValue &&value);
 
   static td::Result<td::vector<object_ptr<td_api::botCommand>>> get_bot_commands(const Query *query);
@@ -445,7 +464,7 @@ class Client : public WebhookActor::Callback {
   static td::Result<int32> get_user_id(const Query *query, Slice field_name = Slice("user_id"));
 
   int64 extract_yet_unsent_message_query_id(int64 chat_id, int64 message_id, bool *is_reply_to_message_deleted);
-  
+
   // start custom helper methods
 
   static td::Result<object_ptr<td_api::MessageSchedulingState>> get_message_scheduling_state(const Query *query);
@@ -474,6 +493,7 @@ class Client : public WebhookActor::Callback {
   Status process_get_me_query(PromisedQueryPtr &query);
   Status process_get_my_commands_query(PromisedQueryPtr &query);
   Status process_set_my_commands_query(PromisedQueryPtr &query);
+  Status process_delete_my_commands_query(PromisedQueryPtr &query);
   Status process_get_user_profile_photos_query(PromisedQueryPtr &query);
   Status process_send_message_query(PromisedQueryPtr &query);
   Status process_send_animation_query(PromisedQueryPtr &query);
@@ -1017,7 +1037,6 @@ class Client : public WebhookActor::Callback {
   int64 current_bot_resolve_query_id_ = 1;
 
   td::string dir_;
-  td::string absolute_dir_;
   td::ActorOwn<td::ClientActor> td_client_;
   td::ActorContext context_;
   std::queue<PromisedQueryPtr> cmd_queue_;
diff --git a/telegram-bot-api/ClientManager.cpp b/telegram-bot-api/ClientManager.cpp
index 4fe7edd..bf0a5de 100644
--- a/telegram-bot-api/ClientManager.cpp
+++ b/telegram-bot-api/ClientManager.cpp
@@ -31,6 +31,7 @@
 #include "td/utils/port/IPAddress.h"
 #include "td/utils/port/Stat.h"
 #include "td/utils/Slice.h"
+#include "td/utils/SliceBuilder.h"
 #include "td/utils/StackAllocator.h"
 #include "td/utils/StringBuilder.h"
 #include "td/utils/Time.h"
@@ -94,29 +95,24 @@ void ClientManager::send(PromisedQueryPtr query) {
     }
     auto id = clients_.create(ClientInfo{BotStatActor(stat_.actor_id(&stat_)), token, td::ActorOwn<Client>()});
     auto *client_info = clients_.get(id);
-    auto stat_actor = client_info->stat_.actor_id(&client_info->stat_);
-    auto client_id = td::create_actor<Client>(
-        PSLICE() << "Client/" << token, actor_shared(this, id), query->token().str(), query->is_user(),
-        query->is_test_dc(), get_tqueue_id(r_user_id.ok(), query->is_test_dc()), parameters_, std::move(stat_actor));
+    client_info->client_ =
+        td::create_actor<Client>(PSLICE() << "Client/" << token, actor_shared(this, id), query->token().str(),  query->is_user(),
+                                 query->is_test_dc(), get_tqueue_id(r_user_id.ok(), query->is_test_dc()), parameters_,
+                                 client_info->stat_.actor_id(&client_info->stat_));
 
     auto method = query->method();
     if (method != "deletewebhook" && method != "setwebhook") {
       auto webhook_info = parameters_->shared_data_->webhook_db_->get(bot_token_with_dc);
       if (!webhook_info.empty()) {
-        send_closure(client_id, &Client::send,
-            get_webhook_restore_query(bot_token_with_dc, query->is_user(), webhook_info, parameters_->shared_data_));
+        send_closure(client_info->client_, &Client::send,
+                     get_webhook_restore_query(bot_token_with_dc, query->is_user() webhook_info, parameters_->shared_data_));
       }
     }
 
-    clients_.get(id)->client_ = std::move(client_id);
     std::tie(id_it, std::ignore) = token_to_id_.emplace(token, id);
   }
-  auto *client_info = clients_.get(id_it->second);
-
-  if (!query->is_internal()) {
-    query->set_stat_actor(client_info->stat_.actor_id(&client_info->stat_));
-  }
-  send_closure(client_info->client_, &Client::send, std::move(query));  // will send 429 if the client is already closed
+  send_closure(clients_.get(id_it->second)->client_, &Client::send,
+               std::move(query));  // will send 429 if the client is already closed
 }
 
 void ClientManager::user_login(PromisedQueryPtr query) {
@@ -407,7 +403,7 @@ void ClientManager::start_up() {
     td::vector<td::uint64> failed_to_replay_log_event_ids;
     td::int64 loaded_event_count = 0;
     binlog
-        ->init("tqueue.binlog",
+        ->init(parameters_->working_directory_ + "tqueue.binlog",
                [&](const td::BinlogEvent &event) {
                  if (tqueue_binlog->replay(event, *tqueue).is_error()) {
                    failed_to_replay_log_event_ids.push_back(event.id_);
@@ -436,7 +432,8 @@ void ClientManager::start_up() {
 
   // init webhook_db and user_db
   auto concurrent_webhook_db = td::make_unique<td::BinlogKeyValue<td::ConcurrentBinlog>>();
-  auto status = concurrent_webhook_db->init("webhooks_db.binlog", td::DbKey::empty(), scheduler_id);
+  auto status = concurrent_webhook_db->init(parameters_->working_directory_ + "webhooks_db.binlog", td::DbKey::empty(),
+                                            scheduler_id);
   LOG_IF(FATAL, status.is_error()) << "Can't open webhooks_db.binlog " << status.error();
   parameters_->shared_data_->webhook_db_ = std::move(concurrent_webhook_db);
 
@@ -510,8 +507,7 @@ PromisedQueryPtr ClientManager::get_webhook_restore_query(td::Slice token, bool
   const auto method = add_string("setwebhook");
   auto query = std::make_unique<Query>(std::move(containers), token, is_user, is_test_dc, method, std::move(args),
                                        td::vector<std::pair<td::MutableSlice, td::MutableSlice>>(),
-                                       td::vector<td::HttpFile>(), std::move(shared_data), td::IPAddress());
-  query->set_internal(true);
+                                       td::vector<td::HttpFile>(), std::move(shared_data), td::IPAddress(), true);
   return PromisedQueryPtr(query.release(), PromiseDeleter(td::PromiseActor<td::unique_ptr<Query>>()));
 }
 
diff --git a/telegram-bot-api/ClientParameters.h b/telegram-bot-api/ClientParameters.h
index d5dd569..d3bffe4 100644
--- a/telegram-bot-api/ClientParameters.h
+++ b/telegram-bot-api/ClientParameters.h
@@ -55,6 +55,9 @@ struct SharedData {
 };
 
 struct ClientParameters {
+  td::string working_directory_;
+  bool allow_colon_in_filenames_ = true;
+
   bool local_mode_ = false;
   bool allow_http_ = false;
   bool use_relative_path_ = false;
diff --git a/telegram-bot-api/HttpConnection.cpp b/telegram-bot-api/HttpConnection.cpp
index 7de8252..499cabf 100644
--- a/telegram-bot-api/HttpConnection.cpp
+++ b/telegram-bot-api/HttpConnection.cpp
@@ -14,6 +14,7 @@
 #include "td/utils/JsonBuilder.h"
 #include "td/utils/logging.h"
 #include "td/utils/Parser.h"
+#include "td/utils/SliceBuilder.h"
 
 namespace telegram_bot_api {
 
@@ -60,7 +61,7 @@ void HttpConnection::handle(td::unique_ptr<td::HttpQuery> http_query,
 
   auto query = std::make_unique<Query>(std::move(http_query->container_), token, is_user, is_test_dc, method,
                                        std::move(http_query->args_), std::move(http_query->headers_),
-                                       std::move(http_query->files_), shared_data_, http_query->peer_address_);
+                                       std::move(http_query->files_), shared_data_, http_query->peer_address_, false);
 
   td::PromiseActor<td::unique_ptr<Query>> promise;
   td::FutureActor<td::unique_ptr<Query>> future;
diff --git a/telegram-bot-api/HttpServer.h b/telegram-bot-api/HttpServer.h
index 35bf747..976836c 100644
--- a/telegram-bot-api/HttpServer.h
+++ b/telegram-bot-api/HttpServer.h
@@ -15,6 +15,7 @@
 #include "td/utils/format.h"
 #include "td/utils/logging.h"
 #include "td/utils/port/SocketFd.h"
+#include "td/utils/SliceBuilder.h"
 #include "td/utils/Time.h"
 
 #include <functional>
diff --git a/telegram-bot-api/Query.cpp b/telegram-bot-api/Query.cpp
index bdae447..f53c93d 100644
--- a/telegram-bot-api/Query.cpp
+++ b/telegram-bot-api/Query.cpp
@@ -14,6 +14,7 @@
 #include "td/utils/logging.h"
 #include "td/utils/misc.h"
 #include "td/utils/port/IPAddress.h"
+#include "td/utils/SliceBuilder.h"
 #include "td/utils/Time.h"
 
 #include <numeric>
@@ -25,7 +26,7 @@ std::unordered_map<td::string, std::unique_ptr<td::VirtuallyJsonable>> empty_par
 Query::Query(td::vector<td::BufferSlice> &&container, td::Slice token, bool is_user, bool is_test_dc, td::MutableSlice method,
              td::vector<std::pair<td::MutableSlice, td::MutableSlice>> &&args,
              td::vector<std::pair<td::MutableSlice, td::MutableSlice>> &&headers, td::vector<td::HttpFile> &&files,
-             std::shared_ptr<SharedData> shared_data, const td::IPAddress &peer_address)
+             std::shared_ptr<SharedData> shared_data, const td::IPAddress &peer_address, bool is_internal)
     : state_(State::Query)
     , shared_data_(shared_data)
     , peer_address_(peer_address)
@@ -36,7 +37,8 @@ Query::Query(td::vector<td::BufferSlice> &&container, td::Slice token, bool is_u
     , method_(method)
     , args_(std::move(args))
     , headers_(std::move(headers))
-    , files_(std::move(files)) {
+    , files_(std::move(files))
+    , is_internal_(is_internal) {
   if (method_.empty()) {
     method_ = arg("method");
   }
@@ -67,6 +69,11 @@ td::int64 Query::files_max_size() const {
                          [](td::int64 acc, const td::HttpFile &file) { return td::max(acc, file.size); });
 }
 
+void Query::set_stat_actor(td::ActorId<BotStatActor> stat_actor) {
+  stat_actor_ = stat_actor;
+  send_request_stat();
+}
+
 void Query::set_ok(td::BufferSlice result) {
   CHECK(state_ == State::Query);
   LOG(INFO) << "QUERY: got ok " << td::tag("ptr", this) << td::tag("text", result.as_slice());
@@ -109,12 +116,26 @@ td::StringBuilder &operator<<(td::StringBuilder &sb, const Query &query) {
   return sb;
 }
 
-void Query::send_response_stat() {
+void Query::send_request_stat() const {
+  if (stat_actor_.empty()) {
+    return;
+  }
+  send_closure(stat_actor_, &BotStatActor::add_event<ServerBotStat::Request>,
+               ServerBotStat::Request{query_size(), file_count(), files_size(), files_max_size()}, td::Time::now());
+}
+
+void Query::send_response_stat() const {
+  auto now = td::Time::now();
+  if (now - start_timestamp_ >= 100.0) {
+    LOG(WARNING) << "Answer too old query with code " << http_status_code_ << " and answer size " << answer_.size()
+                 << ": " << *this;
+  }
+
   if (stat_actor_.empty()) {
     return;
   }
   send_closure(stat_actor_, &BotStatActor::add_event<ServerBotStat::Response>,
-               ServerBotStat::Response{is_ok(), answer().size()}, td::Time::now());
+               ServerBotStat::Response{state_ == State::OK, answer_.size()}, now);
 }
 
 }  // namespace telegram_bot_api
diff --git a/telegram-bot-api/Query.h b/telegram-bot-api/Query.h
index 5491619..3a8e1dc 100644
--- a/telegram-bot-api/Query.h
+++ b/telegram-bot-api/Query.h
@@ -76,17 +76,6 @@ class Query : public td::ListNode {
     return peer_address_;
   }
 
-  // for stats
-  td::int32 file_count() const {
-    return static_cast<td::int32>(files_.size());
-  }
-
-  td::int64 query_size() const;
-
-  td::int64 files_size() const;
-
-  td::int64 files_max_size() const;
-
   td::BufferSlice &answer() {
     return answer_;
   }
@@ -109,26 +98,14 @@ class Query : public td::ListNode {
     return state_ != State::Query;
   }
 
-  bool is_error() const {
-    return state_ == State::Error;
-  }
-
-  bool is_ok() const {
-    return state_ == State::OK;
-  }
-
   bool is_internal() const {
     return is_internal_;
   }
 
-  void set_internal(bool is_internal) {
-    is_internal_ = is_internal;
-  }
-
   Query(td::vector<td::BufferSlice> &&container, td::Slice token, bool is_user, bool is_test_dc, td::MutableSlice method,
         td::vector<std::pair<td::MutableSlice, td::MutableSlice>> &&args,
         td::vector<std::pair<td::MutableSlice, td::MutableSlice>> &&headers, td::vector<td::HttpFile> &&files,
-        std::shared_ptr<SharedData> shared_data, const td::IPAddress &peer_address);
+        std::shared_ptr<SharedData> shared_data, const td::IPAddress &peer_address, bool is_internal);
   Query(const Query &) = delete;
   Query &operator=(const Query &) = delete;
   Query(Query &&) = delete;
@@ -143,10 +120,7 @@ class Query : public td::ListNode {
     return start_timestamp_;
   }
 
-  void set_stat_actor(td::ActorId<BotStatActor> stat_actor) {
-    stat_actor_ = stat_actor;
-  }
-  void send_response_stat();
+  void set_stat_actor(td::ActorId<BotStatActor> stat_actor);
 
  private:
   State state_;
@@ -170,6 +144,21 @@ class Query : public td::ListNode {
   td::BufferSlice answer_;
   int http_status_code_ = 0;
   int retry_after_ = 0;
+
+  // for stats
+  td::int32 file_count() const {
+    return static_cast<td::int32>(files_.size());
+  }
+
+  td::int64 query_size() const;
+
+  td::int64 files_size() const;
+
+  td::int64 files_max_size() const;
+
+  void send_request_stat() const;
+
+  void send_response_stat() const;
 };
 
 td::StringBuilder &operator<<(td::StringBuilder &sb, const Query &query);
diff --git a/telegram-bot-api/Stats.cpp b/telegram-bot-api/Stats.cpp
index 86ddae6..fd6a43c 100644
--- a/telegram-bot-api/Stats.cpp
+++ b/telegram-bot-api/Stats.cpp
@@ -7,8 +7,8 @@
 #include "telegram-bot-api/Stats.h"
 
 #include "td/utils/common.h"
-#include "td/utils/logging.h"
 #include "td/utils/port/thread.h"
+#include "td/utils/SliceBuilder.h"
 #include "td/utils/StringBuilder.h"
 
 namespace telegram_bot_api {
diff --git a/telegram-bot-api/WebhookActor.cpp b/telegram-bot-api/WebhookActor.cpp
index 9a2cf34..33ca271 100644
--- a/telegram-bot-api/WebhookActor.cpp
+++ b/telegram-bot-api/WebhookActor.cpp
@@ -28,6 +28,7 @@
 #include "td/utils/port/SocketFd.h"
 #include "td/utils/Random.h"
 #include "td/utils/ScopeGuard.h"
+#include "td/utils/SliceBuilder.h"
 #include "td/utils/Span.h"
 #include "td/utils/Time.h"
 
@@ -165,7 +166,7 @@ td::Status WebhookActor::create_connection() {
       Callback &operator=(Callback &&) = delete;
       ~Callback() {
         if (!actor_.empty()) {
-          send_closure(std::move(actor_), &WebhookActor::on_socket_ready_async, td::Status::Error("Cancelled"), id_);
+          send_closure(std::move(actor_), &WebhookActor::on_socket_ready_async, td::Status::Error("Canceled"), id_);
         }
       }
       void on_connected() override {
@@ -585,10 +586,10 @@ void WebhookActor::handle(td::unique_ptr<td::HttpQuery> response) {
         if (!method.empty() && method != "deletewebhook" && method != "setwebhook" && method != "close" &&
             method != "logout" && !td::begins_with(method, "get")) {
           VLOG(webhook) << "Receive request " << method << " in response to webhook";
-          auto query =
-              std::make_unique<Query>(std::move(response->container_), td::MutableSlice(), false, false, td::MutableSlice(),
-                                      std::move(response->args_), std::move(response->headers_),
-                                      std::move(response->files_), parameters_->shared_data_, response->peer_address_);
+          auto query = std::make_unique<Query>(std::move(response->container_), td::MutableSlice(), false, false,
+                                               td::MutableSlice(), std::move(response->args_),
+                                               std::move(response->headers_), std::move(response->files_),
+                                               parameters_->shared_data_, response->peer_address_, false);
           auto promised_query =
               PromisedQueryPtr(query.release(), PromiseDeleter(td::PromiseActor<td::unique_ptr<Query>>()));
           send_closure(callback_, &Callback::send, std::move(promised_query));
diff --git a/telegram-bot-api/telegram-bot-api.cpp b/telegram-bot-api/telegram-bot-api.cpp
index 6ecd512..7fc6a34 100644
--- a/telegram-bot-api/telegram-bot-api.cpp
+++ b/telegram-bot-api/telegram-bot-api.cpp
@@ -24,8 +24,8 @@
 #include "td/actor/ConcurrentScheduler.h"
 #include "td/actor/PromiseFuture.h"
 
-#include "td/utils/algorithm.h"
 #include "td/utils/buffer.h"
+#include "td/utils/CombinedLog.h"
 #include "td/utils/common.h"
 #include "td/utils/crypto.h"
 #include "td/utils/ExitGuard.h"
@@ -36,15 +36,19 @@
 #include "td/utils/MemoryLog.h"
 #include "td/utils/misc.h"
 #include "td/utils/OptionParser.h"
+#include "td/utils/PathView.h"
 #include "td/utils/port/IPAddress.h"
 #include "td/utils/port/path.h"
 #include "td/utils/port/rlimit.h"
 #include "td/utils/port/signals.h"
 #include "td/utils/port/stacktrace.h"
+#include "td/utils/port/Stat.h"
 #include "td/utils/port/user.h"
 #include "td/utils/Slice.h"
+#include "td/utils/SliceBuilder.h"
 #include "td/utils/Status.h"
 #include "td/utils/Time.h"
+#include "td/utils/TsLog.h"
 
 #include "memprof/memprof.h"
 
@@ -56,10 +60,10 @@
 
 namespace telegram_bot_api {
 
-static std::atomic_flag need_rotate_log;
+static std::atomic_flag need_reopen_log;
 
-static void rotate_log_signal_handler(int sig) {
-  need_rotate_log.clear();
+static void after_log_rotation_signal_handler(int sig) {
+  need_reopen_log.clear();
 }
 
 static std::atomic_flag need_quit;
@@ -106,11 +110,65 @@ static void sigsegv_signal_handler(int signum, void *addr) {
   fail_signal_handler(signum);
 }
 
+static void dump_statistics(const std::shared_ptr<SharedData> &shared_data,
+                            const std::shared_ptr<td::NetQueryStats> &net_query_stats) {
+  if (is_memprof_on()) {
+    LOG(WARNING) << "Memory dump:";
+    td::vector<AllocInfo> v;
+    dump_alloc([&](const AllocInfo &info) { v.push_back(info); });
+    std::sort(v.begin(), v.end(), [](const AllocInfo &a, const AllocInfo &b) { return a.size > b.size; });
+    size_t total_size = 0;
+    size_t other_size = 0;
+    int count = 0;
+    for (auto &info : v) {
+      if (count++ < 50) {
+        LOG(WARNING) << td::format::as_size(info.size) << td::format::as_array(info.backtrace);
+      } else {
+        other_size += info.size;
+      }
+      total_size += info.size;
+    }
+    LOG(WARNING) << td::tag("other", td::format::as_size(other_size));
+    LOG(WARNING) << td::tag("total size", td::format::as_size(total_size));
+    LOG(WARNING) << td::tag("total traces", get_ht_size());
+    LOG(WARNING) << td::tag("fast_backtrace_success_rate", get_fast_backtrace_success_rate());
+  }
+  auto r_mem_stat = td::mem_stat();
+  if (r_mem_stat.is_ok()) {
+    auto mem_stat = r_mem_stat.move_as_ok();
+    LOG(WARNING) << td::tag("rss", td::format::as_size(mem_stat.resident_size_));
+    LOG(WARNING) << td::tag("vm", td::format::as_size(mem_stat.virtual_size_));
+    LOG(WARNING) << td::tag("rss_peak", td::format::as_size(mem_stat.resident_size_peak_));
+    LOG(WARNING) << td::tag("vm_peak", td::format::as_size(mem_stat.virtual_size_peak_));
+  }
+  LOG(WARNING) << td::tag("buffer_mem", td::format::as_size(td::BufferAllocator::get_buffer_mem()));
+  LOG(WARNING) << td::tag("buffer_slice_size", td::format::as_size(td::BufferAllocator::get_buffer_slice_size()));
+
+  auto query_count = shared_data->query_count_.load();
+  LOG(WARNING) << td::tag("pending queries", query_count);
+
+  td::uint64 i = 0;
+  bool was_gap = false;
+  for (auto end = &shared_data->query_list_, cur = end->prev; cur != end; cur = cur->prev, i++) {
+    if (i < 20 || i > query_count - 20 || i % (query_count / 50 + 1) == 0) {
+      if (was_gap) {
+        LOG(WARNING) << "...";
+        was_gap = false;
+      }
+      LOG(WARNING) << static_cast<const Query &>(*cur);
+    } else {
+      was_gap = true;
+    }
+  }
+
+  td::dump_pending_network_queries(*net_query_stats);
+}
+
 int main(int argc, char *argv[]) {
   SET_VERBOSITY_LEVEL(VERBOSITY_NAME(FATAL));
   td::ExitGuard exit_guard;
 
-  need_rotate_log.test_and_set();
+  need_reopen_log.test_and_set();
   need_quit.test_and_set();
   need_change_verbosity_level.test_and_set();
   need_dump_log.test_and_set();
@@ -118,7 +176,7 @@ int main(int argc, char *argv[]) {
   td::Stacktrace::init();
 
   td::setup_signals_alt_stack().ensure();
-  td::set_signal_handler(td::SignalType::User, rotate_log_signal_handler).ensure();
+  td::set_signal_handler(td::SignalType::User, after_log_rotation_signal_handler).ensure();
   td::ignore_signal(td::SignalType::HangUp).ensure();
   td::ignore_signal(td::SignalType::Pipe).ensure();
   td::set_signal_handler(td::SignalType::Quit, quit_signal_handler).ensure();
@@ -134,7 +192,7 @@ int main(int argc, char *argv[]) {
   auto start_time = td::Time::now();
   auto shared_data = std::make_shared<SharedData>();
   auto parameters = std::make_unique<ClientParameters>();
-  parameters->version_ = "5.2";
+  parameters->version_ = "5.3";
   parameters->shared_data_ = shared_data;
   parameters->start_time_ = start_time;
   auto net_query_stats = td::create_net_query_stats();
@@ -142,6 +200,7 @@ int main(int argc, char *argv[]) {
 
   td::OptionParser options;
   bool need_print_usage = false;
+  bool need_print_version = false;
   int http_port = 8081;
   int http_stat_port = 0;
   td::string http_ip_address = "0.0.0.0";
@@ -150,7 +209,7 @@ int main(int argc, char *argv[]) {
   int default_verbosity_level = 0;
   int memory_verbosity_level = VERBOSITY_NAME(INFO);
   td::int64 log_max_file_size = 2000000000;
-  td::string working_directory;
+  td::string working_directory = PSTRING() << "." << TD_DIR_SLASH;
   td::string temporary_directory;
   td::string username;
   td::string groupname;
@@ -173,7 +232,8 @@ int main(int argc, char *argv[]) {
   options.set_usage(td::Slice(argv[0]), "--api-id=<arg> --api-hash=<arg> [--local] [OPTION]...");
   options.set_description("Telegram Bot API server");
   options.add_option('h', "help", "display this help text and exit", [&] { need_print_usage = true; });
-  options.add_option('\0', "local", "allow the Bot API server to serve local requests and disables the file limits",
+  options.add_option('\0', "version", "display version number and exit", [&] { need_print_version = true; });
+  options.add_option('\0', "local", "allow the Bot API server to serve local requests",
                      [&] { parameters->local_mode_ = true; });
   options.add_option('\0', "no-file-limit", "disable the file limits",
 		             [&] { parameters->no_file_limit_ = true; });
@@ -288,77 +348,17 @@ int main(int argc, char *argv[]) {
     LOG(PLAIN) << options;
     return 0;
   }
+  if (need_print_version) {
+    LOG(PLAIN) << "Bot API " << parameters->version_;
+    return 0;
+  }
   if (r_non_options.is_error()) {
-    LOG(PLAIN) << argv[0] << ": " << r_non_options.error();
+    LOG(PLAIN) << argv[0] << ": " << r_non_options.error().message();
     LOG(PLAIN) << options;
     return 1;
   }
 
-  class CombineLog : public td::LogInterface {
-   public:
-    void append(td::CSlice slice, int log_level) override {
-      if (first_ && log_level <= first_verbosity_level_) {
-        if (log_level == VERBOSITY_NAME(FATAL) && second_ && VERBOSITY_NAME(FATAL) <= second_verbosity_level_) {
-          second_->append(slice, VERBOSITY_NAME(ERROR));
-        }
-        first_->append(slice, log_level);
-      }
-      if (second_ && log_level <= second_verbosity_level_) {
-        second_->append(slice, log_level);
-      }
-    }
-
-    void set_first(LogInterface *first) {
-      first_ = first;
-    }
-
-    void set_second(LogInterface *second) {
-      second_ = second;
-    }
-
-    void set_first_verbosity_level(int verbosity_level) {
-      first_verbosity_level_ = verbosity_level;
-    }
-
-    void set_second_verbosity_level(int verbosity_level) {
-      second_verbosity_level_ = verbosity_level;
-    }
-
-    int get_first_verbosity_level() const {
-      return first_verbosity_level_;
-    }
-
-    int get_second_verbosity_level() const {
-      return second_verbosity_level_;
-    }
-
-    void rotate() override {
-      if (first_) {
-        first_->rotate();
-      }
-      if (second_) {
-        second_->rotate();
-      }
-    }
-
-    td::vector<td::string> get_file_paths() override {
-      td::vector<td::string> result;
-      if (first_) {
-        td::append(result, first_->get_file_paths());
-      }
-      if (second_) {
-        td::append(result, second_->get_file_paths());
-      }
-      return result;
-    }
-
-   private:
-    LogInterface *first_ = nullptr;
-    int first_verbosity_level_ = VERBOSITY_NAME(FATAL);
-    LogInterface *second_ = nullptr;
-    int second_verbosity_level_ = VERBOSITY_NAME(FATAL);
-  };
-  CombineLog log;
+  td::CombinedLog log;
   log.set_first(td::default_log_interface);
   log.set_second(&memory_log);
   td::log_interface = &log;
@@ -376,15 +376,65 @@ int main(int argc, char *argv[]) {
       TRY_STATUS_PREFIX(td::change_user(username, groupname), "Can't change effective user: ");
     }
 
-    if (!working_directory.empty()) {
-      TRY_STATUS_PREFIX(td::chdir(working_directory), "Can't set working directory: ");
+    {
+      TRY_RESULT_PREFIX_ASSIGN(working_directory, td::realpath(working_directory, true),
+                               "Invalid working directory specified: ");
+      if (working_directory.empty()) {
+        return td::Status::Error("Working directory can't be empty");
+      }
+      if (working_directory.back() != TD_DIR_SLASH) {
+        working_directory += TD_DIR_SLASH;
+      }
+
+      TRY_STATUS_PREFIX(td::mkpath(working_directory, 0750), "Failed to create working directory: ");
+
+      auto r_temp_file = td::mkstemp(working_directory);
+      if (r_temp_file.is_error()) {
+        return td::Status::Error(PSLICE() << "Can't create files in the directory \"" << working_directory
+                                          << "\". Use --dir option to specify a writable working directory");
+      }
+      r_temp_file.ok_ref().first.close();
+      td::unlink(r_temp_file.ok().second).ensure();
+
+      auto r_temp_dir = td::mkdtemp(working_directory, "1:a");
+      if (r_temp_dir.is_error()) {
+        parameters->allow_colon_in_filenames_ = false;
+        r_temp_dir = td::mkdtemp(working_directory, "1~a");
+        if (r_temp_dir.is_error()) {
+          return td::Status::Error(PSLICE() << "Can't create directories in the directory \"" << working_directory
+                                            << "\". Use --dir option to specify a writable working directory");
+        }
+      }
+      td::rmdir(r_temp_dir.ok()).ensure();
     }
 
     if (!temporary_directory.empty()) {
+      if (td::PathView(temporary_directory).is_relative()) {
+        temporary_directory = working_directory + temporary_directory;
+      }
       TRY_STATUS_PREFIX(td::set_temporary_dir(temporary_directory), "Can't set temporary directory: ");
     }
 
+    {  // check temporary directory
+      auto temp_dir = td::get_temporary_dir();
+      if (temp_dir.empty()) {
+        return td::Status::Error("Can't find directory for temporary files. Use --temp-dir option to specify it");
+      }
+
+      auto r_temp_file = td::mkstemp(temp_dir);
+      if (r_temp_file.is_error()) {
+        return td::Status::Error(PSLICE()
+                                 << "Can't create files in the directory \"" << temp_dir
+                                 << "\". Use --temp-dir option to specify another directory for temporary files");
+      }
+      r_temp_file.ok_ref().first.close();
+      td::unlink(r_temp_file.ok().second).ensure();
+    }
+
     if (!log_file_path.empty()) {
+      if (td::PathView(log_file_path).is_relative()) {
+        log_file_path = working_directory + log_file_path;
+      }
       TRY_STATUS_PREFIX(file_log.init(log_file_path, log_max_file_size), "Can't open log file: ");
       log.set_first(&ts_log);
     }
@@ -392,11 +442,13 @@ int main(int argc, char *argv[]) {
     return td::Status::OK();
   }();
   if (init_status.is_error()) {
-    LOG(PLAIN) << init_status.error();
+    LOG(PLAIN) << init_status.error().message();
     LOG(PLAIN) << options;
     return 1;
   }
 
+  parameters->working_directory_ = std::move(working_directory);
+
   if (parameters->default_max_webhook_connections_ <= 0) {
     parameters->default_max_webhook_connections_ = parameters->local_mode_ ? 100 : 40;
   }
@@ -458,8 +510,8 @@ int main(int argc, char *argv[]) {
   while (true) {
     sched.run_main(next_cron_time - td::Time::now());
 
-    if (!need_rotate_log.test_and_set()) {
-      td::log_interface->rotate();
+    if (!need_reopen_log.test_and_set()) {
+      td::log_interface->after_rotation();
     }
 
     if (!need_quit.test_and_set()) {
@@ -468,7 +520,8 @@ int main(int argc, char *argv[]) {
         std::_Exit(0);
       }
 
-      LOG(WARNING) << "Stopping engine by a signal";
+      LOG(WARNING) << "Stopping engine with uptime " << (td::Time::now() - start_time) << " seconds by a signal";
+      dump_statistics(shared_data, net_query_stats);
       close_flag = true;
       auto guard = sched.get_main_guard();
       send_closure(client_manager, &ClientManager::close, td::PromiseCreator::lambda([&can_quit](td::Unit) {
@@ -497,6 +550,7 @@ int main(int argc, char *argv[]) {
 
     if (!need_dump_log.test_and_set()) {
       print_log();
+      dump_statistics(shared_data, net_query_stats);
     }
 
     double now = td::Time::now();
@@ -525,48 +579,7 @@ int main(int argc, char *argv[]) {
 
     if (now > last_dump_time + 300.0) {
       last_dump_time = now;
-      if (is_memprof_on()) {
-        LOG(WARNING) << "Memory dump:";
-        td::vector<AllocInfo> v;
-        dump_alloc([&](const AllocInfo &info) { v.push_back(info); });
-        std::sort(v.begin(), v.end(), [](const AllocInfo &a, const AllocInfo &b) { return a.size > b.size; });
-        size_t total_size = 0;
-        size_t other_size = 0;
-        int count = 0;
-        for (auto &info : v) {
-          if (count++ < 50) {
-            LOG(WARNING) << td::format::as_size(info.size) << td::format::as_array(info.backtrace);
-          } else {
-            other_size += info.size;
-          }
-          total_size += info.size;
-        }
-        LOG(WARNING) << td::tag("other", td::format::as_size(other_size));
-        LOG(WARNING) << td::tag("total", td::format::as_size(total_size));
-        LOG(WARNING) << td::tag("total traces", get_ht_size());
-        LOG(WARNING) << td::tag("fast_backtrace_success_rate", get_fast_backtrace_success_rate());
-      }
-      LOG(WARNING) << td::tag("buffer_mem", td::format::as_size(td::BufferAllocator::get_buffer_mem()));
-      LOG(WARNING) << td::tag("buffer_slice_size", td::format::as_size(td::BufferAllocator::get_buffer_slice_size()));
-
-      auto query_count = shared_data->query_count_.load();
-      LOG(WARNING) << td::tag("pending queries", query_count);
-
-      td::uint64 i = 0;
-      bool was_gap = false;
-      for (auto end = &shared_data->query_list_, cur = end->prev; cur != end; cur = cur->prev, i++) {
-        if (i < 20 || i > query_count - 20 || i % (query_count / 50 + 1) == 0) {
-          if (was_gap) {
-            LOG(WARNING) << "...";
-            was_gap = false;
-          }
-          LOG(WARNING) << static_cast<Query &>(*cur);
-        } else {
-          was_gap = true;
-        }
-      }
-
-      td::dump_pending_network_queries(*net_query_stats);
+      dump_statistics(shared_data, net_query_stats);
     }
   }