Client configuration

The MTProto API has multiple configuration parameters that can be fetched with the appropriate methods.

MTProto configuration

config#cc1a241e flags:# default_p2p_contacts:flags.3?true preload_featured_stickers:flags.4?true revoke_pm_inbox:flags.6?true blocked_mode:flags.8?true force_try_ipv6:flags.14?true date:int expires:int test_mode:Bool this_dc:int dc_options:Vector<DcOption> dc_txt_domain_name:string chat_size_max:int megagroup_size_max:int forwarded_count_max:int online_update_period_ms:int offline_blur_timeout_ms:int offline_idle_timeout_ms:int online_cloud_timeout_ms:int notify_cloud_delay_ms:int notify_default_delay_ms:int push_chat_period_ms:int push_chat_limit:int edit_time_limit:int revoke_time_limit:int revoke_pm_time_limit:int rating_e_decay:int stickers_recent_limit:int channels_read_media_period:int tmp_sessions:flags.0?int call_receive_timeout_ms:int call_ring_timeout_ms:int call_connect_timeout_ms:int call_packet_timeout_ms:int me_url_prefix:string autoupdate_url_prefix:flags.7?string gif_search_username:flags.9?string venue_search_username:flags.10?string img_search_username:flags.11?string static_maps_provider:flags.12?string caption_length_max:int message_length_max:int webfile_dc_id:int suggested_lang_code:flags.2?string lang_pack_version:flags.2?int base_lang_pack_version:flags.2?int reactions_default:flags.15?Reaction autologin_token:flags.16?string = Config;
nearestDc#8e1a1775 country:string this_dc:int nearest_dc:int = NearestDc;

updateConfig#a229dd06 = Update;

---functions---

help.getConfig#c4f9186b = Config;
help.getNearestDc#1fb33026 = NearestDc;

The huge config constructor contains lots of useful information, from chat and message size limitations, to privacy settings, online status refresh interval and timeout, VoIP configuration, default inline bot usernames for GIF, image and venue lookup, and lots of other global and user-specific information, check out the constructor page for more information.

The configuration should be manually refreshed immediately upon receival of an updateConfig update.

Client configuration

jsonObjectValue#c0de1bd9 key:string value:JSONValue = JSONObjectValue;

jsonNull#3f6d7b68 = JSONValue;
jsonBool#c7345e6a value:Bool = JSONValue;
jsonNumber#2be0dfa4 value:double = JSONValue;
jsonString#b71e767a value:string = JSONValue;
jsonArray#f7444763 value:Vector<JSONValue> = JSONValue;
jsonObject#99c1d49d value:Vector<JSONObjectValue> = JSONValue;

help.appConfigNotModified#7cde641d = help.AppConfig;
help.appConfig#dd18782e hash:int config:JSONValue = help.AppConfig;

updateConfig#a229dd06 = Update;

---functions---

help.getAppConfig#61e3f854 hash:int = help.AppConfig;

The help.getAppConfig method returns a JSON object containing rapidly evolving, client-specific configuration parameters.
While help.getConfig returns MTProto-specific configuration with information about server-side limitations and other MTProto-related information, help.getAppConfig returns configuration parameters useful for graphical Telegram clients.

When first invoking help.getAppConfig, pass 0 to hash; in future calls, use the hash contained in the previously returned help.appConfig; if the configuration hasn't changed, a help.appConfigNotModified will be returned instead of help.appConfig.

The configuration should be manually refreshed immediately upon receival of an updateConfig update.

Example value of help.appConfig.config:

{
    "emojies_animated_zoom": 0.625,
    "emojies_send_dice": [
        "\ud83c\udfb2",
        "\ud83c\udfaf",
        "\ud83c\udfc0",
        "\u26bd",
        "\u26bd\ufe0f",
        "\ud83c\udfb0",
        "\ud83c\udfb3"
    ],
    "emojies_send_dice_success": {
        "\ud83c\udfaf": {
            "value": 6,
            "frame_start": 62
        },
        "\ud83c\udfc0": {
            "value": 5,
            "frame_start": 110
        },
        "\u26bd": {
            "value": 5,
            "frame_start": 110
        },
        "\u26bd\ufe0f": {
            "value": 5,
            "frame_start": 110
        },
        "\ud83c\udfb0": {
            "value": 64,
            "frame_start": 110
        },
        "\ud83c\udfb3": {
            "value": 6,
            "frame_start": 110
        }
    },
    "emojies_sounds": {
        "\ud83c\udf83": {
            "id": "4956223179606458539",
            "access_hash": "-2107001400913062971",
            "file_reference_base64": ""
        },
        "\u26b0": {
            "id": "4956223179606458540",
            "access_hash": "-1498869544183595185",
            "file_reference_base64": ""
        },
        "\ud83e\udddf\u200d\u2642": {
            "id": "4960929110848176331",
            "access_hash": "3986395821757915468",
            "file_reference_base64": ""
        },
        "\ud83e\udddf": {
            "id": "4960929110848176332",
            "access_hash": "-8929417974289765626",
            "file_reference_base64": ""
        },
        "\ud83e\udddf\u200d\u2640": {
            "id": "4960929110848176333",
            "access_hash": "9161696144162881753",
            "file_reference_base64": ""
        },
        "\ud83c\udf51": {
            "id": "4963180910661861548",
            "access_hash": "-7431729439735063448",
            "file_reference_base64": ""
        },
        "\ud83c\udf8a": {
            "id": "5094064004578410732",
            "access_hash": "8518192996098758509",
            "file_reference_base64": ""
        },
        "\ud83c\udf84": {
            "id": "5094064004578410733",
            "access_hash": "-4142643820629256996",
            "file_reference_base64": ""
        },
        "\ud83e\uddbe": {
            "id": "5094064004578410734",
            "access_hash": "-8934384022571962340",
            "file_reference_base64": ""
        }
    },
    "gif_search_branding": "tenor",
    "gif_search_emojies": [
        "\ud83d\udc4d",
        "\ud83d\ude18",
        "\ud83d\ude0d",
        "\ud83d\ude21",
        "\ud83e\udd73",
        "\ud83d\ude02",
        "\ud83d\ude2e",
        "\ud83d\ude44",
        "\ud83d\ude0e",
        "\ud83d\udc4e"
    ],
    "stickers_emoji_suggest_only_api": false,
    "stickers_emoji_cache_time": 86400,
    "groupcall_video_participants_max": 1000,
    "qr_login_camera": true,
    "qr_login_code": "primary",
    "dialog_filters_enabled": true,
    "dialog_filters_tooltip": true,
    "autoarchive_setting_available": true,
    "pending_suggestions": [],
    "autologin_domains": [
        "instantview.telegram.org",
        "translations.telegram.org",
        "contest.dev",
        "contest.com",
        "bugs.telegram.org",
        "suggestions.telegram.org",
        "themes.telegram.org",
        "promote.telegram.org",
        "ads.telegram.org"
    ],
    "url_auth_domains": [
        "web.telegram.org",
        "web.t.me",
        "k.t.me",
        "z.t.me",
        "a.t.me"
    ],
    "round_video_encoding": {
        "diameter": 384,
        "video_bitrate": 1000,
        "audio_bitrate": 64,
        "max_size": 12582912
    },
    "chat_read_mark_expire_period": 604800,
    "chat_read_mark_size_threshold": 100,
    "reactions_uniq_max": 11,
    "ringtone_duration_max": 5,
    "ringtone_size_max": 307200,
    "ringtone_saved_count_max": 100,
    "premium_purchase_blocked": false,
    "channels_limit_default": 500,
    "channels_limit_premium": 1000,
    "saved_gifs_limit_default": 200,
    "saved_gifs_limit_premium": 400,
    "stickers_faved_limit_default": 5,
    "stickers_faved_limit_premium": 10,
    "dialog_filters_limit_default": 10,
    "dialog_filters_limit_premium": 30,
    "dialog_filters_chats_limit_default": 100,
    "dialog_filters_chats_limit_premium": 200,
    "dialogs_pinned_limit_default": 5,
    "dialogs_pinned_limit_premium": 10,
    "dialogs_folder_pinned_limit_default": 100,
    "dialogs_folder_pinned_limit_premium": 200,
    "channels_public_limit_default": 10,
    "channels_public_limit_premium": 20,
    "caption_length_limit_default": 1024,
    "caption_length_limit_premium": 4096,
    "upload_max_fileparts_default": 4000,
    "upload_max_fileparts_premium": 8000,
    "about_length_limit_default": 70,
    "about_length_limit_premium": 140,
    "stickers_premium_by_emoji_num": 0,
    "stickers_normal_by_emoji_per_premium_num": 3,
    "message_animated_emoji_max": 100,
    "reactions_user_max_default": 1,
    "reactions_user_max_premium": 3,
    "reactions_in_chat_max": 100,
    "default_emoji_statuses_stickerset_id": "773947703670341676",
    "chatlist_invites_limit_default": 3,
    "chatlist_invites_limit_premium": 100,
    "chatlists_joined_limit_default": 2,
    "chatlists_joined_limit_premium": 20,
    "premium_promo_order": [
        "stories",
        "more_upload",
        "double_limits",
        "business",
        "last_seen",
        "voice_to_text",
        "faster_download",
        "translations",
        "animated_emoji",
        "emoji_status",
        "saved_tags",
        "peer_colors",
        "wallpapers",
        "profile_badge",
        "message_privacy",
        "advanced_chat_management",
        "no_ads",
        "app_icons",
        "infinite_reactions",
        "animated_userpics",
        "premium_stickers",
        "effects"
    ],
    "business_promo_order": [
        "business_location",
        "business_hours",
        "quick_replies",
        "greeting_message",
        "away_message",
        "business_links",
        "business_intro",
        "business_bots",
        "emoji_status",
        "folder_tags",
        "stories"
    ],
    "premium_bot_username": "PremiumBot",
    "whitelisted_domains": [
        "telegram.dog",
        "telegram.me",
        "telegram.org",
        "t.me",
        "telesco.pe",
        "fragment.com",
        "translations.telegram.org"
    ],
    "topics_pinned_limit": 5,
    "telegram_antispam_user_id": "5434988373",
    "telegram_antispam_group_size_min": 200,
    "fragment_prefixes": [
        "888"
    ],
    "hidden_members_group_size_min": 100,
    "premium_gift_attach_menu_icon": true,
    "premium_gift_text_field_icon": false,
    "chatlist_update_period": 300,
    "small_queue_max_active_operations_count": 5,
    "large_queue_max_active_operations_count": 2,
    "story_viewers_expire_period": 86400,
    "story_expiring_limit_default": 3,
    "story_expiring_limit_premium": 100,
    "story_caption_length_limit_premium": 2048,
    "story_caption_length_limit_default": 200,
    "stories_posting": "enabled",
    "stories_stealth_past_period": 300,
    "stories_stealth_future_period": 1500,
    "stories_stealth_cooldown_period": 10800,
    "stories_sent_weekly_limit_default": 7,
    "stories_sent_weekly_limit_premium": 700,
    "stories_sent_monthly_limit_default": 30,
    "stories_sent_monthly_limit_premium": 3000,
    "stories_venue_search_username": "foursquare",
    "stories_entities": "premium",
    "stories_changelog_user_id": 777000,
    "authorization_autoconfirm_period": 604800,
    "stories_suggested_reactions_limit_default": 1,
    "stories_suggested_reactions_limit_premium": 5,
    "giveaway_gifts_purchase_available": true,
    "giveaway_add_peers_max": 10,
    "giveaway_countries_max": 10,
    "giveaway_boosts_per_premium": 4,
    "giveaway_period_max": 2678400,
    "boosts_channel_level_max": 100,
    "boosts_per_sent_gift": 3,
    "quote_length_max": 1024,
    "transcribe_audio_trial_weekly_number": 0,
    "transcribe_audio_trial_duration_max": 300,
    "recommended_channels_limit_default": 10,
    "recommended_channels_limit_premium": 100,
    "channel_bg_icon_level_min": 4,
    "channel_profile_bg_icon_level_min": 7,
    "channel_emoji_status_level_min": 8,
    "channel_wallpaper_level_min": 9,
    "channel_custom_wallpaper_level_min": 10,
    "saved_dialogs_pinned_limit_default": 5,
    "saved_dialogs_pinned_limit_premium": 100,
    "pm_read_date_expire_period": 604800,
    "group_transcribe_level_min": 6,
    "group_emoji_stickers_level_min": 4,
    "group_profile_bg_icon_level_min": 5,
    "group_emoji_status_level_min": 8,
    "group_wallpaper_level_min": 9,
    "group_custom_wallpaper_level_min": 10,
    "quick_replies_limit": 100,
    "quick_reply_messages_limit": 20,
    "upload_premium_speedup_upload": 10,
    "upload_premium_speedup_download": 10,
    "upload_premium_speedup_notify_period": 3600,
    "intro_title_length_limit": 32,
    "intro_description_length_limit": 70,
    "business_chat_links_limit": 100,
    "channel_restrict_sponsored_level_min": 50,
    "channel_revenue_withdrawal_enabled": true,
    "dismissed_suggestions": [],
    "stories_pinned_to_top_count_max": 3,
    "stars_purchase_blocked": false,
    "stories_area_url_max": 3,
    "stars_revenue_withdrawal_min": 1000,
    "stars_paid_post_amount_max": 2500,
    "web_app_allowed_protocols": [
        "http",
        "https"
    ],
    "bot_preview_medias_max": 12,
    "ton_proxy_address": "magic.org",
    "weather_search_username": "StoryWeatherBot",
    "story_weather_preload": true,
    "stars_gifts_enabled": true,
    "stars_subscription_amount_max": 2500,
    "stars_usd_sell_rate_x1000": 1410,
    "stars_usd_withdraw_rate_x1000": 1300,
    "stars_paid_reaction_amount_max": 2500,
    "stargifts_message_length_max": 255,
    "stargifts_blocked": false,
    "stargifts_convert_period_max": 7776000,
    "starref_start_param_prefixes": [
        "_tgr_"
    ],
    "starref_program_allowed": true,
    "starref_connect_allowed": true,
    "starref_min_commission_permille": 1,
    "starref_max_commission_permille": 900,
    "video_ignore_alt_documents": false,
    "keep_alive_service": true,
    "background_connection": true,
    "can_edit_factcheck": false,
    "factcheck_length_limit": 1024,
    "premium_invoice_slug": "abc"
}

The fields included in the resulting JSON object are:

`weather_search_username`

Contains the username of the bot used to query the current weather, to use in weather media areas as specified here ». (string)

`story_weather_preload`

If set and true, clients should preload the current weather on startup (as opposed to only when creating a weather media area) by querying the bot specified in weather_search_username. (boolean)

`emojies_animated_zoom`

Animated emojis and animated dice should be scaled by this factor before being shown to the user (float)

`keep_alive_service`

Whether app clients should start a keepalive service to keep the app running and fetch updates even when the app is closed (boolean)

`background_connection`

Whether app clients should start a background TCP connection for MTProto update fetching (boolean)

`emojies_send_dice`

A list of supported animated dice stickers (array of strings).

`emojies_send_dice_success`

For animated dice emojis other than the basic , indicates the winning dice value and the final frame of the animated sticker, at which to show the fireworks (object with emoji keys and object values, containing value and frame_start float values)

`emojies_sounds`

A map of soundbites to be played when the user clicks on the specified animated emoji; the file reference field should be base64-decoded before downloading the file (map of file IDs (inputDocument.id), with emoji string keys)

`gif_search_branding`

Specifies the name of the service providing GIF search through gif_search_username (string)

`gif_search_emojies`

Specifies a list of emojis that should be suggested as search term in a bar above the GIF search box (array of string emojis)

`stickers_emoji_suggest_only_api`

Specifies that the app should not display local sticker suggestions » for emojis at all and just use the result of messages.getStickers (bool)

`stickers_emoji_cache_time`

Specifies the validity period of the local cache of messages.getStickers, also relevant when generating the pagination hash when invoking the method. (integer)

`qr_login_camera`

Whether the Settings->Devices menu should show an option to scan a QR login code (boolean)

`qr_login_code`

Whether the login screen should show a QR code login option, possibly as default login method (string, "disabled", "primary" or "secondary")

`dialog_filters_enabled`

Whether clients should show an option for managing dialog filters AKA folders (boolean)

`dialog_filters_tooltip`

Whether clients should actively show a tooltip, inviting the user to configure dialog filters AKA folders; typically this happens when the chat list is long enough to start getting cluttered. (boolean)

`autoarchive_setting_available`

Whether clients can invoke account.setGlobalPrivacySettings with globalPrivacySettings.archive_and_mute_new_noncontact_peers = boolTrue, to automatically archive and mute new incoming chats from non-contacts. (boolean)

`pending_suggestions`

Contains a list of suggestions that should be actively shown as a tooltip to the user. (Array of strings, possible values shown in the suggestions section »).

`dismissed_suggestions`

Contains a list of inverted suggestions that were dismissed by the user. (Array of strings, possible values shown in the inverted suggestions section »).

`topics_pinned_limit`

Maximum number of topics that can be pinned in a single forum. (integer)

`telegram_antispam_user_id`

The ID of the official native antispam bot, that will automatically delete spam messages if enabled as specified in the native antispam documentation ».
When fetching the admin list of a supergroup using channels.getParticipants, if native antispam functionality in the specified supergroup, the bot should be manually added to the admin list displayed to the user. (numeric string that represents a Telegram user/bot ID, should be casted to an int64)

`telegram_antispam_group_size_min`

Minimum number of group members required to enable native antispam functionality. (integer)

`fragment_prefixes`

List of phone number prefixes for anonymous Fragment phone numbers. (array of strings).

`hidden_members_group_size_min`

Minimum number of participants required to hide the participants list of a supergroup using channels.toggleParticipantsHidden. (integer)

`url_auth_domains`

A list of domains that support automatic login with manual user confirmation, click here for more info on URL authorization ». (array of strings)

`autologin_domains`

A list of Telegram domains that support automatic login with no user confirmation, click here for more info on URL authorization ». (array of strings)

`whitelisted_domains`

A list of Telegram domains that can always be opened without additional user confirmation, when clicking on in-app links where the URL is not fully displayed (i.e. messageEntityTextUrl entities). (array of strings)

Note that when opening direct Mini App links for the first time, confirmation should still be requested from the user, even if the domain of the containing deep link is whitelisted (i.e. t.me/<bot_username>/<short_name>?startapp=<start_parameter>, where t.me is whitelisted).

Confirmation should always be asked, even if we already opened the direct Mini App before, if the link is not visible (i.e. messageEntityTextUrl text links, inline buttons etc.).

`round_video_encoding`

Contains a set of recommended codec parameters for round videos. (object, as described in the example)

`chat_read_mark_size_threshold`

Per-user read receipts, fetchable using messages.getMessageReadParticipants, will be available in groups with an amount of participants less or equal to chat_read_mark_size_threshold. (integer)

`chat_read_mark_expire_period`

To protect user privacy, read receipts for chats are only stored for chat_read_mark_expire_period seconds after the message was sent. (integer)

`pm_read_date_expire_period`

To protect user privacy, read receipts for private chats are only stored for pm_read_date_expire_period seconds after the message was sent. (integer)

`groupcall_video_participants_max`

Maximum number of participants in a group call (livestreams allow ∞ participants) (integer)

`reactions_uniq_max`

Maximum number of unique reactions for any given message: for example, if there are 2000 and 1000 custom emoji reactions and reactions_uniq_max = 2, you can't add a reaction, because that would raise the number of unique reactions to 3 > 2. (integer)

`reactions_in_chat_max`

Maximum number of reactions that can be marked as allowed in a chat using chatReactionsSome. (integer)

`reactions_user_max_default`

Maximum number of reactions that can be added to a single message by a non-Premium user. (integer)

`reactions_user_max_premium`

Maximum number of reactions that can be added to a single message by a Premium user. (integer)

`default_emoji_statuses_stickerset_id`

Default emoji status stickerset ID. (integer)
Note that the stickerset can be fetched using inputStickerSetEmojiDefaultStatuses.

`ringtone_duration_max`

The maximum duration in seconds of uploadable notification sounds » (integer)

`ringtone_size_max`

The maximum post-conversion size in bytes of uploadable notification sounds »

`ringtone_saved_count_max`

The maximum number of saveable notification sounds »

`message_animated_emoji_max`

The maximum number of custom emojis that may be present in a message. (integer)

`stickers_premium_by_emoji_num`

Defines how many Premium stickers to show in the sticker suggestion popup when entering an emoji into the text field, see the sticker docs for more info (integer, defaults to 0)

`stickers_normal_by_emoji_per_premium_num`

For Premium users, used to define the suggested sticker list, see the sticker docs for more info (integer, defaults to 2)

`premium_purchase_blocked`

The user can't purchase Telegram Premium. The app must also hide all Premium features, including stars for other users, et cetera. (boolean)

`channels_limit_default`

The maximum number of channels and supergroups a non-Premium user may join (integer)

`channels_limit_premium`

The maximum number of channels and supergroups a Premium user may join (integer)

`saved_gifs_limit_default`

The maximum number of GIFs a non-Premium user may save (integer)

`saved_gifs_limit_premium`

The maximum number of GIFs a Premium user may save (integer)

`stickers_faved_limit_default`

The maximum number of stickers a non-Premium user may add to Favorites » (integer)

`stickers_faved_limit_premium`

The maximum number of stickers a Premium user may add to Favorites » (integer)

`dialog_filters_limit_default`

The maximum number of folders a non-Premium user may create (integer)

`dialog_filters_limit_premium`

The maximum number of folders a Premium user may create (integer)

`dialog_filters_chats_limit_default`

The maximum number of chats a non-Premium user may add to a folder (integer)

`dialog_filters_chats_limit_premium`

The maximum number of chats a Premium user may add to a folder (integer)

`dialogs_pinned_limit_default`

The maximum number of chats a non-Premium user may pin (integer)

`dialogs_pinned_limit_premium`

The maximum number of chats a Premium user may pin (integer)

`dialogs_folder_pinned_limit_default`

The maximum number of chats a non-Premium user may pin in a folder (integer)

`dialogs_folder_pinned_limit_premium`

The maximum number of chats a Premium user may pin in a folder (integer)

`channels_public_limit_default`

The maximum number of public channels or supergroups a non-Premium user may create (integer)

`channels_public_limit_premium`

The maximum number of public channels or supergroups a Premium user may create (integer)

`caption_length_limit_default`

The maximum UTF-8 length of media captions sendable by non-Premium users (integer)

`caption_length_limit_premium`

The maximum UTF-8 length of media captions sendable by Premium users (integer)

`upload_max_fileparts_default`

The maximum number of file parts uploadable by non-Premium users (integer, the maximum file size can be extrapolated by multiplying this value by 524288, the biggest possible chunk size)

`upload_max_fileparts_premium`

The maximum number of file parts uploadable by Premium users (integer, the maximum file size can be extrapolated by multiplying this value by 524288, the biggest possible chunk size)

`about_length_limit_default`

The maximum UTF-8 length of bios of non-Premium users (integer)

`about_length_limit_premium`

The maximum UTF-8 length of bios of Premium users (integer)

`premium_promo_order`

Array of string identifiers, indicating the order of Telegram Premium features in the Telegram Premium promotion popup, see here for the possible values »

`business_promo_order`

Array of string identifiers, indicating the order of Telegram Business features in the Telegram Business promotion popup, see here for the possible values »

`premium_bot_username`

Contains the username of the official Telegram Premium bot that may be used to buy a Telegram Premium subscription, see here for detailed instructions » (string)

`premium_invoice_slug`

Contains an invoice slug that may be used to buy a Telegram Premium subscription, see here for detailed instructions » (string)

`premium_gift_attach_menu_icon`

Whether a gift icon should be shown in the attachment menu in private chats with users, offering the current user to gift a Telegram Premium subscription to the other user in the chat. (boolean)

`premium_gift_text_field_icon`

Whether a gift icon should be shown in the text bar in private chats with users (ie like the / icon in chats with bots), offering the current user to gift a Telegram Premium subscription to the other user in the chat. Can only be true if premium_gift_attach_menu_icon is also true. (boolean)

`chatlist_update_period`

Users that import a folder using a chat folder deep link » should retrieve additions made to the folder by invoking chatlists.getChatlistUpdates at most every chatlist_update_period seconds. (integer)

`chatlist_invites_limit_default`

Maximum number of per-folder chat folder deep links » that can be created by non-Premium users. (integer)

`chatlist_invites_limit_premium`

Maximum number of per-folder chat folder deep links » that can be created by Premium users. (integer)

`chatlists_joined_limit_default`

Maximum number of shareable folders non-Premium users may have. (integer)

`chatlists_joined_limit_premium`

Maximum number of shareable folders Premium users may have. (integer)

`small_queue_max_active_operations_count`

A soft limit, specifying the maximum number of files that should be downloaded in parallel from the same DC, for files smaller than 20MB. (integer)

`large_queue_max_active_operations_count`

A soft limit, specifying the maximum number of files that should be downloaded in parallel from the same DC, for files bigger than 20MB. (integer)

`authorization_autoconfirm_period`

An unconfirmed session » will be autoconfirmed this many seconds after login. (integer)

`story_viewers_expire_period`

The exact list of users that viewed the story will be hidden from the poster this many seconds after the story expires. (integer)

This limit applies only to non-Premium users, Premium users can always access the viewer list.

`story_expiring_limit_default`

The maximum number of active stories for non-Premium users (integer).

`story_expiring_limit_premium`

The maximum number of active stories for Premium users (integer).

`story_caption_length_limit_premium`

The maximum UTF-8 length of story captions for Premium users. (integer)

`story_caption_length_limit_default`

The maximum UTF-8 length of story captions for non-Premium users. (integer)

`stories_posting`

Indicates whether users can post stories. (string)

One of:

enabled - Any user can post stories.
premium - Only users with a Premium subscription can post stories.
disabled - Users can't post stories.

`stories_stealth_past_period`

Enabling stories stealth mode with the past flag will erase views of any story opened in the past stories_stealth_past_period seconds. (integer)

`stories_stealth_future_period`

Enabling stories stealth mode with the future flag will hide views of any story opened in the next stories_stealth_future_period seconds. (integer)

`stories_stealth_cooldown_period`

After enabling stories stealth mode, this many seconds must elapse before the user is allowed to enable it again. (integer)

`stories_sent_weekly_limit_default`

Maximum number of stories that can be sent in a week by non-Premium users. (integer)

`stories_sent_weekly_limit_premium`

Maximum number of stories that can be sent in a week by Premium users. (integer)

`stories_sent_monthly_limit_default`

Maximum number of stories that can be sent in a month by non-Premium users. (integer)

`stories_sent_monthly_limit_premium`

Maximum number of stories that can be sent in a month by Premium users. (integer)

`stories_suggested_reactions_limit_default`

Maximum number of story reaction media areas » that can be added to a story by non-Premium users. (integer)

`stories_suggested_reactions_limit_premium`

Maximum number of story reaction media areas » that can be added to a story by Premium users. (integer)

`stories_venue_search_username`

Username of the inline bot to use to generate venue location tags for stories, see here » for more info. (string)

`stories_changelog_user_id`

ID of the official Telegram user that will post stories about new Telegram features: stories posted by this user should be shown on the active or active and hidden stories bar just like for contacts, even if the user was removed from the contact list. (integer, defaults to 777000)

`stories_entities`

Whether styled text entities and links in story text captions can be used by all users (enabled), only [Premium](/api/premium users) (premium), or no one (disabled). (string)

This field is used both when posting stories, to indicate to the user whether they can use entities, and when viewing stories, to hide entities (client-side) on stories posted by users whose Premium subscription has expired (if stories_entities == "premium" and user.premium is not set, or if stories_entities == "disabled").

`stories_area_url_max`

Maximum number of URL media areas » that can be added to a posted story. (integer)

`giveaway_gifts_purchase_available`

Whether giveaways can be started by the current user. (boolean)

`giveaway_add_peers_max`

The maximum number of users that can be specified when making a direct giveaway. (integer)

`giveaway_countries_max`

The maximum number of countries that can be specified when restricting the set of participating countries in a giveaway. (itneger)

`giveaway_boosts_per_premium`

The number of boosts that will be gained by a channel for each winner of a giveaway. (integer)

`giveaway_period_max`

The maximum duration in seconds of a giveaway. (integer)

`boosts_channel_level_max`

Maximum boost level for channels. (integer)

`boosts_per_sent_gift`

The number of additional boost slots that the current user will receive when gifting a Telegram Premium subscription.

`transcribe_audio_trial_weekly_number`

The maximum number of speech recognition » calls per week for non-Premium users. (integer)

`transcribe_audio_trial_duration_max`

The maximum allowed duration of media in seconds for speech recognition » for non-Premium users. (integer)

`recommended_channels_limit_default`

The maximum number of similar channels that can be recommended by channels.getChannelRecommendations» to non-Premium users. (integer)

`recommended_channels_limit_premium`

The maximum number of similar channels that can be recommended by channels.getChannelRecommendations» to Premium users. (integer)

`quote_length_max`

Maximum UTF-8 length of quoted text. (integer)

`channel_bg_icon_level_min`

After reaching at least this boost level », channels gain the ability to change their message accent palette emoji ». (integer)

`channel_profile_bg_icon_level_min`

After reaching at least this boost level » and the boost level specified in the channel_min_level field of the help.peerColorOption constructor for the chosen palette, channels gain the ability to change the emoji and color used in the profile accent palette ». (integer)

`group_profile_bg_icon_level_min`

After reaching at least this boost level and the boost level specified in the group_min_level field of the help.peerColorOption constructor for the chosen palette, supergroups gain the ability to change the emoji and color used in the profile accent palette ». (integer)

`channel_emoji_status_level_min`

After reaching at least this boost level », channels gain the ability to change their status emoji ». (integer)

`group_emoji_status_level_min`

After reaching at least this boost level », supergroups gain the ability to change their status emoji ». (integer)

`channel_wallpaper_level_min`

After reaching at least this boost level », channels gain the ability to set a fill channel wallpaper, see here » for more info. (integer)

`group_wallpaper_level_min`

After reaching at least this boost level », supergroups gain the ability to set a fill supergroup wallpaper, see here » for more info. (integer)

`channel_custom_wallpaper_level_min`

After reaching at least this boost level », channels gain the ability to set any custom wallpaper, not just fill channel wallpapers, see here » for more info. (integer)

`group_custom_wallpaper_level_min`

After reaching at least this boost level », supergroups gain the ability to set any custom wallpaper, not just fill supergroup wallpapers, see here » for more info. (integer)

`group_transcribe_level_min`

After reaching at least this boost level », non-Premium users in the supergroup gain the ability to transcribe any voice message, without using up their free transcription quota. (integer)

`group_emoji_stickers_level_min`

After reaching at least this boost level », supergroups gain the ability to associate a custom emoji stickerset », which can be used by all users of the group (including non-Premium users!), for messages sent within the group. (integer)

`channel_restrict_sponsored_level_min`

After reaching at least this boost level, channel owners may disable ads on the channel for all users using channels.restrictSponsoredMessages. (integer)

`saved_dialogs_pinned_limit_default`

Maximum number of pinned dialogs in saved messages for non-Premium users. (integer)

`saved_dialogs_pinned_limit_premium`

Maximum number of pinned dialogs in saved messages for Premium users. (integer)

`can_edit_factcheck`

If set and true, the current user is an independent fact-checker and may edit fact-checks ». (boolean)

`factcheck_length_limit`

Maximum UTF-8 length of fact-checks ». (integer)

`quick_replies_limit`

Maximum number of quick reply shortcuts » that may be created. (integer)

`quick_reply_messages_limit`

Maximum number of messages that may be added to a quick reply shortcut ». (integer)

`intro_title_length_limit`

Maximum UTF-8 length of the business introduction title ». (integer)

`intro_description_length_limit`

Maximum UTF-8 length of the business introduction description ». (integer)

`business_chat_links_limit`

Maximum number of active business chat links. (integer)

`upload_premium_speedup_upload`

Indicates the file upload speedup enjoyed by Premium subscribers, used as specified here » in the Premium modal shown when receiving FLOOD_WAIT_PREMIUM_X errors during file uploads. (integer)

`upload_premium_speedup_download`

Indicates the file download speedup enjoyed by Premium subscribers, used as specified here » in the Premium modal shown when receiving FLOOD_WAIT_PREMIUM_X errors during file downloads. (integer)

`upload_premium_speedup_notify_period`

The Premium modal shown when receiving FLOOD_WAIT_PREMIUM_X errors during file uploads/downloads should be shown at most every upload_premium_speedup_notify_period seconds. (integer)

`stories_pinned_to_top_count_max`

The maximum number of stories that can be pinned on top of the profile ». (integer)

`channel_revenue_withdrawal_enabled`

If true, indicates that channel ad revenue withdrawal is enabled in the current region; otherwise, all ad revenue-related UI options should be hidden from the user. (boolean)

`stars_purchase_blocked`

If false, indicates that Telegram Stars may be used in the current region; otherwise, all Star-related UI options should be hidden from the user. (boolean)

`stars_revenue_withdrawal_min`

Minimum required amount of Telegram Stars on a channel or bot's balance to allow withdrawal ». (integer)

`stars_paid_post_amount_max`

Maximum price in Telegram Stars for posted paid media. (integer)

`stars_gifts_enabled`

Star gifting functionality should only be enabled if this flag is equal to true. (boolean)

`bot_preview_medias_max`

Maximum number of main mini app previews » that can be added for a localization. (integer)

`web_app_allowed_protocols`

Specifies a list of allowed schemes for URLs received in web_app_open_link events. (array of strings)

`ton_proxy_address`

Specifies the domain name to be used to securely open TON sites ». (string)

`stars_subscription_amount_max`

Specifies the maximum allowed price in Stars of a Telegram Star subscription ». (int)

`stars_usd_sell_rate_x1000`

Specifies the number of US dollars required to buy one thousand Telegram Stars. (float)

`stars_usd_withdraw_rate_x1000`

Specifies the number of US dollars that will be received by withdrawing » one thousand Telegram Stars. (float)

`stars_paid_reaction_amount_max`

Maximum number of paid reactions that may be sent on a post. (integer)

`stargifts_message_length_max`

The maximum length of gift messages, see here » for more info. (integer)

`stargifts_blocked`

If set and equal to true, gifts » must be disabled. (boolean)

`stargifts_convert_period_max`

A Gift » can be converted back into Telegram Stars only if it was received less than stargifts_convert_period_max seconds ago. (integer)

`video_ignore_alt_documents`

If set and equal to true, indicates that the messageMediaDocument.alt_documents field must be ignored. (boolean)

`starref_start_param_prefixes`

Start parameter referral program prefixes for referral links ». (string)

`starref_program_allowed`

If set and false, the current user cannot create referral programs » for bots they own. (boolean)

`starref_connect_allowed`

If set and false, the current user cannot join referral programs, becoming an affiliate ». (boolean)

`starref_min_commission_permille`

Minimum allowed permille affiliate commission for referral programs ». (integer)

`starref_max_commission_permille`

Maximum allowed permille affiliate commission for referral programs ». (integer)

Suggestions

The API can return a set of useful suggestions for users of graphical clients.

Basic suggestions

jsonObjectValue#c0de1bd9 key:string value:JSONValue = JSONObjectValue;

jsonNull#3f6d7b68 = JSONValue;
jsonBool#c7345e6a value:Bool = JSONValue;
jsonNumber#2be0dfa4 value:double = JSONValue;
jsonString#b71e767a value:string = JSONValue;
jsonArray#f7444763 value:Vector<JSONValue> = JSONValue;
jsonObject#99c1d49d value:Vector<JSONObjectValue> = JSONValue;

---functions---

help.getAppConfig#61e3f854 hash:int = help.AppConfig;

The help.getAppConfig method returns a JSON object containing rapidly evolving, client-specific configuration parameters.
A full list of these parameters can be seen in the Client Configuration section », but we're mostly interested in the pending_suggestions and autoarchive_setting_available fields of the returned JSON object:

autoarchive_setting_available - Whether clients can invoke account.setGlobalPrivacySettings with globalPrivacySettings.archive_and_mute_new_noncontact_peers = boolTrue, to automatically archive and mute new incoming chats from non-contacts. (boolean)
pending_suggestions - Contains a list of suggestions that should be actively shown as a tooltip to the user. Array of strings, possible values shown below:
- "AUTOARCHIVE_POPULAR" - Users should invoke account.setGlobalPrivacySettings with globalPrivacySettings.archive_and_mute_new_noncontact_peers = boolTrue, to automatically archive and mute new incoming chats from non-contacts.
- "VALIDATE_PASSWORD" - Users should make sure they still remember their 2-step verification password.
- "VALIDATE_PHONE_NUMBER" - Users should check whether their authorization phone number is correct and change the phone number if it is inaccessible.
- "NEWCOMER_TICKS" - Show the user a hint about the meaning of one and two ticks on sent messages.
- "SETUP_PASSWORD" - Show the user a hint, asking them to check whether they still remember their 2FA password
- "PREMIUM_ANNUAL" - Suggests the user to subscribe to Telegram Premium (with annual payments)
- "PREMIUM_UPGRADE" - Suggests the user to upgrade their existing Premium subscription from monthly payments to annual payments
- "PREMIUM_RESTORE" - Suggests the user to restore a recently expired Premium subscription
- "PREMIUM_CHRISTMAS" - Suggests the user to gift Telegram Premium subscriptions to friends for Christmas.
- "PREMIUM_GRACE" - Suggests the user to extend their expiring Telegram Premium subscription
- "BIRTHDAY_SETUP" - Suggests the user to set a birthday ».
- "STARS_SUBSCRIPTION_LOW_BALANCE" - When we get close to the end of the subscription period of one or more active subscriptions, and the current Telegram Star balance is not high enough to autorenew at least one of them, this suggestion will be activated: when the user clicks on the suggestion, the client should fetch and display the list of expiring subscriptions by invoking payments.getStarsSubscriptions, passing inputPeerSelf to peer and setting the missing_balance flag: the returned subscriptions may be renewed by filling up the current Telegram Star balance with at least payments.starsStatus.subscriptions_missing_balance stars.

Inverted suggestions

These suggestions are enabled by default, and are never returned in the pending_suggestions field of the client configuration object.

They can be dismissed by invoking help.dismissSuggestion as usual, but unlike basic suggestions, once dismissed they will appear in the dismissed_suggestions field of the client configuration object.

"BIRTHDAY_CONTACTS_TODAY" - If not dismissed, indicates that the client should display the tooltip that recommends to gift a Telegram Premium subscription to contacts on their birthday ».
This suggestion can be dismissed by invoking help.dismissSuggestion when the user hides the tooltip, but it is also automatically dismissed by the server if the user gifts one or more Telegram Premium subscriptions to friends with birthdays falling within the next/previous 24 hours.

Channel suggestions

messages.chatFull#e5d7d19c full_chat:ChatFull chats:Vector<Chat> users:Vector<User> = messages.ChatFull;

channelFull#bbab348d flags:# can_view_participants:flags.3?true can_set_username:flags.6?true can_set_stickers:flags.7?true hidden_prehistory:flags.10?true can_set_location:flags.16?true has_scheduled:flags.19?true can_view_stats:flags.20?true blocked:flags.22?true flags2:# can_delete_channel:flags2.0?true antispam:flags2.1?true participants_hidden:flags2.2?true translations_disabled:flags2.3?true stories_pinned_available:flags2.5?true view_forum_as_messages:flags2.6?true restricted_sponsored:flags2.11?true can_view_revenue:flags2.12?true paid_media_allowed:flags2.14?true can_view_stars_revenue:flags2.15?true paid_reactions_available:flags2.16?true id:long about:string participants_count:flags.0?int admins_count:flags.1?int kicked_count:flags.2?int banned_count:flags.2?int online_count:flags.13?int read_inbox_max_id:int read_outbox_max_id:int unread_count:int chat_photo:Photo notify_settings:PeerNotifySettings exported_invite:flags.23?ExportedChatInvite bot_info:Vector<BotInfo> migrated_from_chat_id:flags.4?long migrated_from_max_id:flags.4?int pinned_msg_id:flags.5?int stickerset:flags.8?StickerSet available_min_id:flags.9?int folder_id:flags.11?int linked_chat_id:flags.14?long location:flags.15?ChannelLocation slowmode_seconds:flags.17?int slowmode_next_send_date:flags.18?int stats_dc:flags.12?int pts:int call:flags.21?InputGroupCall ttl_period:flags.24?int pending_suggestions:flags.25?Vector<string> groupcall_default_join_as:flags.26?Peer theme_emoticon:flags.27?string requests_pending:flags.28?int recent_requesters:flags.28?Vector<long> default_send_as:flags.29?Peer available_reactions:flags.30?ChatReactions reactions_limit:flags2.13?int stories:flags2.4?PeerStories wallpaper:flags2.7?WallPaper boosts_applied:flags2.8?int boosts_unrestrict:flags2.9?int emojiset:flags2.10?StickerSet = ChatFull;

---functions---

channels.getFullChannel#8736a09 channel:InputChannel = messages.ChatFull;

Some channel/supergroup-related suggestions can also be contained in the pending_suggestions field of the channelFull constructor, returned by channels.getFullChannel.
Here's a list of possible suggestions:

CONVERT_GIGAGROUP - The supergroup has many participants: the admin should call channels.convertToGigagroup to convert it to a gigagroup.

Dismissing suggestions

boolFalse#bc799737 = Bool;
boolTrue#997275b5 = Bool;

---functions---

help.dismissSuggestion#f50dbaa1 peer:InputPeer suggestion:string = Bool;

help.dismissSuggestion can be used to dismiss a suggestion.
Pass inputPeerEmpty to peer for basic suggestions and the channel/supergroup's peer for channel suggestions.

App-specific configuration

help.appUpdate#ccbbce30 flags:# can_not_skip:flags.0?true id:int version:string text:string entities:Vector<MessageEntity> document:flags.1?Document url:flags.2?string sticker:flags.3?Document = help.AppUpdate;
help.noAppUpdate#c45a6536 = help.AppUpdate;

updates#74ae4240 updates:Vector<Update> users:Vector<User> chats:Vector<Chat> date:int seq:int = Updates;
updateServiceNotification#ebe46819 flags:# popup:flags.0?true invert_media:flags.2?true inbox_date:flags.1?int type:string message:string media:MessageMedia entities:Vector<MessageEntity> = Update;

help.inviteText#18cb9f78 message:string = help.InviteText;

---functions---

help.getAppUpdate#522d5a7d source:string = help.AppUpdate;

help.getInviteText#4d392343 = help.InviteText;

help.getAppUpdate - Get info about an application update, can contain the updated application binary in the attached document
help.getInviteText - Returns a localized invitation message that can be sent via SMS to contacts that haven't signed up to Telegram yet

Terms of service

help.termsOfServiceUpdateEmpty#e3309f7f expires:int = help.TermsOfServiceUpdate;
help.termsOfServiceUpdate#28ecf961 expires:int terms_of_service:help.TermsOfService = help.TermsOfServiceUpdate;

help.termsOfService#780a0310 flags:# popup:flags.0?true id:DataJSON text:string entities:Vector<MessageEntity> min_age_confirm:flags.1?int = help.TermsOfService;

auth.authorizationSignUpRequired#44747e9a flags:# terms_of_service:flags.0?help.TermsOfService = auth.Authorization;

---functions---

help.getTermsOfServiceUpdate#2ca51fd1 = help.TermsOfServiceUpdate;
help.acceptTermsOfService#ee72f79a id:DataJSON = Bool;

auth.signIn#8d52a951 flags:# phone_number:string phone_code_hash:string phone_code:flags.0?string email_verification:flags.1?EmailVerification = auth.Authorization;

account.deleteAccount#a2c0cf74 flags:# reason:string password:flags.0?InputCheckPasswordSRP = Bool;

These methods can be used for managing consent to Telegram's Terms Of Service.

Typically, before a user signs up by invoking auth.signUp, apps should show a pop-up (if the popup flag of the help.termsOfService method is set), asking the user to accept Telegram's terms of service; in case of denial, the user is to be returned to the initial page of the login flow.

When signing up for the first time, the help.termsOfService is to be obtained from the auth.authorizationSignUpRequired constructor returned by the auth.signIn.

After signing up, or when logging in as an existing user, apps are supposed to call help.getTermsOfServiceUpdate to check for any updates to the Terms of Service; this call should be repeated after expires seconds have elapsed.
If an update to the Terms Of Service is available, clients are supposed to show a consent popup; if accepted, clients should call help.acceptTermsOfService, providing the termsOfService id JSON object; in case of denial, clients are to delete the account using account.deleteAccount, providing Decline ToS update as deletion reason.

Example implementation: android (signup), android (after login)

Telegram support info

user#83314fca flags:# self:flags.10?true contact:flags.11?true mutual_contact:flags.12?true deleted:flags.13?true bot:flags.14?true bot_chat_history:flags.15?true bot_nochats:flags.16?true verified:flags.17?true restricted:flags.18?true min:flags.20?true bot_inline_geo:flags.21?true support:flags.23?true scam:flags.24?true apply_min_photo:flags.25?true fake:flags.26?true bot_attach_menu:flags.27?true premium:flags.28?true attach_menu_enabled:flags.29?true flags2:# bot_can_edit:flags2.1?true close_friend:flags2.2?true stories_hidden:flags2.3?true stories_unavailable:flags2.4?true contact_require_premium:flags2.10?true bot_business:flags2.11?true bot_has_main_app:flags2.13?true id:long access_hash:flags.0?long first_name:flags.1?string last_name:flags.2?string username:flags.3?string phone:flags.4?string photo:flags.5?UserProfilePhoto status:flags.6?UserStatus bot_info_version:flags.14?int restriction_reason:flags.18?Vector<RestrictionReason> bot_inline_placeholder:flags.19?string lang_code:flags.22?string emoji_status:flags.30?EmojiStatus usernames:flags2.0?Vector<Username> stories_max_id:flags2.5?int color:flags2.8?PeerColor profile_color:flags2.9?PeerColor bot_active_users:flags2.12?int = User;

help.support#17c6b5f6 phone_number:string user:User = help.Support;
help.supportName#8c05f1c9 name:string = help.SupportName;

---functions---

help.getSupport#9cdf08cd = help.Support;
help.getSupportName#d360e72c = help.SupportName;

These methods can be used for fetching info about Telegram's support user, that users can use to get support and ask questions about the app.

help.getSupport - Will return the user object that can be used for contacting support.
help.getSupportName - Will return a localized name for the support chat.

Country information and login phone patterns

help.countryCode#4203c5ef flags:# country_code:string prefixes:flags.0?Vector<string> patterns:flags.1?Vector<string> = help.CountryCode;

help.country#c3878e23 flags:# hidden:flags.0?true iso2:string default_name:string name:flags.1?string country_codes:Vector<help.CountryCode> = help.Country;

help.countriesListNotModified#93cc1f32 = help.CountriesList;
help.countriesList#87d0759e countries:Vector<help.Country> hash:int = help.CountriesList;

---functions---
help.getCountriesList#735787a8 lang_code:string hash:int = help.CountriesList;

help.getCountriesList can be used to fetch a list of localized names for all available countries and phone code patterns for logging in.

The phone code pattern should be used when showing the login screen, or when changing phone number: for example, a pattern value of XXX XXX XXX with country_code +39 indicates that the phone field for login should accept a spaced pattern like +39 123 456 789.
Also, the beginning of the national part of the phone number (123 456 789) should match one of the prefixes, if any were returned.

Additionally, the fragment_prefixes client configuration parameter contains a list of phone number prefixes for anonymous Fragment phone numbers.

Telegram is a cloud-based mobile and desktop messaging app with a focus on security and speed.