Yandex SmartCaptcha for Flutter

This package makes it easy to integrate Yandex SmartCaptcha into Flutter-based Android, iOS, and web apps. On Android and iOS, it uses a native in-app WebView. On the web, it uses a DOM element and JavaScript interop. To learn more about the Yandex SmartCaptcha service, visit its official page.

Motivation

One day at work, I urgently needed to integrate Yandex SmartCaptcha into a mobile app, and the flutter_yandex_smartcaptcha package came to the rescue. However, I discovered a serious bug and reported it to the author. When they didn’t respond, I decided to create a similar package myself and learn how to publish packages on pub.dev in the process. End of story.

Usage

Super simple! Here’s the minimal example:

YandexSmartCaptcha(
  config: CaptchaConfig(
    clientKey: 'your-client-key',
  ),
  onChallengeSolved: (token) {
    // Handle the solved captcha token.
  },
)

In most cases, you only need the YandexSmartCaptcha and CaptchaConfig classes. CaptchaController is optional and useful when you need to trigger validation, reset the widget, or destroy it…