send_voice

template<class Agent>
api_result<message_t, Agent&&> send_voice(Agent &&agent, send_voice_args_t args)

template<class Agent, class F>
void send_voice(Agent &&agent, send_voice_args_t args, F &&callback)

agent is any object satisfying agent concept.

callback is any callable object accepting expected<message_t>.

Use this method to send audio files, if you want Telegram clients to display the file as a playable voice message. For this to work, your audio must be in an .OGG file encoded with OPUS, or in .MP3 format, or in .M4A format (other formats may be sent as Audio or Document). On success, the sent Message is returned. Bots can currently send voice messages of up to 50 MB in size, this limit may be changed in the future.

struct send_voice_args_t

Arguments that should be passed to send_voice().

variant_t<integer_t, string_t> chat_id

Unique identifier for the target chat or username of the target channel (in the format @channelusername)

variant_t<input_file_t, string_t> voice

Audio file to send. Pass a file_id as String to send a file that exists on the Telegram servers (recommended), pass an HTTP URL as a String for Telegram to get a file from the Internet, or upload a new one using multipart/form-data. More information on Sending Files »

optional_t<string_t> business_connection_id

Unique identifier of the business connection on behalf of which the message will be sent

optional_t<integer_t> message_thread_id

Unique identifier for the target message thread (topic) of the forum; for forum supergroups only

optional_t<string_t> caption

Voice message caption, 0-1024 characters after entities parsing

optional_t<string_t> parse_mode

Mode for parsing entities in the voice message caption. See formatting options for more details.

optional_t<array_t<message_entity_t>> caption_entities

A JSON-serialized list of special entities that appear in the caption, which can be specified instead of parse_mode

optional_t<integer_t> duration

Duration of the voice message in seconds

optional_t<boolean_t> disable_notification

Sends the message silently. Users will receive a notification with no sound.

optional_t<boolean_t> protect_content

Protects the contents of the sent message from forwarding and saving

optional_t<reply_parameters_t> reply_parameters

Description of the message to reply to

optional_t<variant_t<inline_keyboard_markup_t, reply_keyboard_markup_t, reply_keyboard_remove_t, force_reply_t>> reply_markup

Additional interface options. A JSON-serialized object for an inline keyboard, custom reply keyboard, instructions to remove a reply keyboard or to force a reply from the user