Data from an opened reply keyboard bot web app was relayed to the bot that owns it (user side service message).
Clients should display a service message with the text
Data from the «$text» button was transferred to the bot.
messageActionWebViewDataSent#b4c38cb5 text:string = MessageAction;
|text||string||Text of the keyboardButtonSimpleWebView that was pressed to open the web app.|
Can only be sent or received as part of a reply keyboard, use keyboardButtonWebView for inline keyboards.
Bots can offer users interactive HTML5 web apps to completely replace any website.