answerPreCheckoutQuery method

Future<bool> answerPreCheckoutQuery(
  1. String preCheckoutQueryId,
  2. bool ok, {
  3. String? errorMessage,
})

Use this method to respond to such pre-checkout queries

Once the user has confirmed their payment and shipping details, the Bot API sends the final confirmation in the form of an Update with the field preCheckoutQuery.

On success, True is returned.

Note: The Bot API must receive an answer within 10 seconds after the pre-checkout query was sent.

https://core.telegram.org/bots/api#answerprecheckoutquery

Implementation

Future<bool> answerPreCheckoutQuery(String preCheckoutQueryId, bool ok,
    {String? errorMessage}) async {
  if (!ok && errorMessage == null) {
    return Future.error(TelegramException(
        'Attribute \'errorMessage\' can not be null when \'ok\' = false'));
  }
  var requestUrl = _apiUri('answerPreCheckoutQuery');
  var body = <String, dynamic>{
    'pre_checkout_query_id': preCheckoutQueryId,
    'ok': ok,
    'error_message': errorMessage,
  };
  return await HttpClient.httpPost(requestUrl, body: body);
}