TdLib has many options which impose limitations on implementation, gives useful information or can alter TdLib behaviour. Each option has name and value. Value may be of one of the following types:
| Type of value | Default value | Value range |
| Integer | 0 | 32-bit integer |
| Boolean | false | True or false |
| String | Any Unicode string |
Options not listed in this list may be safely ignored.
| Name | Type | Writable | Description |
| authorization_date | Integer | No | Unix time when last authorization was received |
| broadcast_size_max | Integer | No | Maximum number of broadcast recipients |
| chat_big_size | Integer | No | Chat must be considered Big in disabled_* options if it has at least specified number of participants |
| connection_state | String | No | Current connection state to the server. One of “Waiting for network”, “Connecting”, “Updating” or “Ready” |
| disabled_bigchat_create | String | No | If not empty, creation of new Big group chats is temporarily disabled |
| disabled_bigchat_message | String | No | If not empty, sending messages is temporarily disabled in Big group chats |
| disabled_bigchat_upload_audio | String | No | If not empty, audio upload is temporarily disabled in Big group chats |
| disabled_bigchat_upload_document | String | No | If not empty, documents upload is temporarily disabled in Big group chats |
| disabled_bigchat_upload_photo | String | No | If not empty, photo upload is temporarily disabled in Big group chats |
| disabled_broadcast_create | String | No | If not empty, creation of new broadcasts is temporarily disabled |
| disabled_chat_create | String | No | If not empty, creation of new group chats is temporarily disabled |
| disabled_chat_message | String | No | If not empty, sending messages is temporarily disabled in group chats |
| disabled_chat_upload_audio | String | No | If not empty, audio upload is temporarily disabled in group chats |
| disabled_chat_upload_document | String | No | If not empty, documents upload is temporarily disabled in group chats |
| disabled_chat_upload_photo | String | No | If not empty, photo upload is temporarily disabled in group chats |
| disabled_bigfile_download | String | No | If not empty, download of big media files is temporarily disabled |
| disabled_file_download | String | No | If not empty, media download is temporarily disabled |
| disabled_photo_download | String | No | If not empty, photos download is temporarily disabled |
| disabled_pm_message | String | No | If not empty, sending messages is temporarily disabled in private and secret chats |
| disabled_pm_upload_audio | String | No | If not empty, audio upload is temporarily disabled in private and secret chats |
| disabled_pm_upload_document | String | No | If not empty, documents upload is temporarily disabled in private and secret chats |
| disabled_pm_upload_photo | String | No | If not empty, photo upload is temporarily disabled in private and secret chats |
| group_size_max | Integer | No | Maximum number of participants in a group |
| forwarded_messages_count_max | Integer | No | Maximum number of forwarded messages in one request |
| my_id | Integer | No | Identifier of currently logged in user |
| network_unreachable | Boolean | Yes | If true, TdLib will not try to establish new network connections, connection state will change to WaitingForNetwork |
| supergroup_size_max | Integer | No | Maximum number of participants in a supergroup |
| test_mode | Boolean | No | If true, use test environment instead of production. Can be set only before authorization begins |