answer_callback_query

template<class Agent>
api_result<boolean_t, Agent&&> answer_callback_query(Agent &&agent, answer_callback_query_args_t args)

template<class Agent, class F>
void answer_callback_query(Agent &&agent, answer_callback_query_args_t args, F &&callback)

agent is any object satisfying agent concept.

callback is any callable object accepting expected<boolean_t>.

Use this method to send answers to callback queries sent from inline keyboards. The answer will be displayed to the user as a notification at the top of the chat screen or as an alert. On success, True is returned. Alternatively, the user can be redirected to the specified Game URL. For this option to work, you must first create a game for your bot via @BotFather and accept the terms. Otherwise, you may use links like t.me/your_bot?start=XXXX that open your bot with a parameter.

struct answer_callback_query_args_t

Arguments that should be passed to answer_callback_query().

string_t callback_query_id

Unique identifier for the query to be answered

optional_t<string_t> text

Text of the notification. If not specified, nothing will be shown to the user, 0-200 characters

optional_t<boolean_t> show_alert

If True, an alert will be shown by the client instead of a notification at the top of the chat screen. Defaults to false.

optional_t<string_t> url

URL that will be opened by the user’s client. If you have created a Game and accepted the conditions via @BotFather, specify the URL that opens your game - note that this will only work if the query comes from a callback_game button. Otherwise, you may use links like t.me/your_bot?start=XXXX that open your bot with a parameter.

optional_t<integer_t> cache_time

The maximum amount of time in seconds that the result of the callback query may be cached client-side. Telegram apps will support caching starting in version 3.14. Defaults to 0.