Can I get a phone number by user id via Telegram Bot API?

Question

I am using Telegram Bot API for sending instant messages to users. I have installed nuget package. This package is recommend by telegram developers.

I have created a telegram bot and successfully got access to it by using code. When I send messsage to bot, bot gets some info about sender.

I need the phone numbers of users to identify them in our system and send the information back to them.

My question is Can i get a user phone number by telegramUserId?

I'm doing it for user convenience. If I could to get a user phone number I should't have to ask for it from the user.

Now my command like this:

debt 9811201243

I want

debt

Answer 1

No, unfortunately Telegram Bot API doesn't return phone number. You should either use Telegram API methods instead or ask it explicitly from the user. You cannot get "friends" of a user as well.

You will definitely retrieve the following information:

1. userid
2. first_name
3. content (whatever it is: text, photo, etc.)
4. date (unixtime)
5. chat_id

If user configured it, you will also get last_name and username.