How to display emoticon code on Node.JS Telegram Bot Api?

Question

Node.js

Hello !
I need that when the user sends a smiley, the bot sends its code to me in the terminal.
The problem is that when I send the code, a question mark appears in the terminal (that is, it does not understand what this character is).
Please do not offer any ready-made modules on Node.js, I'm interested in how this is done by handles.
I would be grateful if you tell me how to distinguish the user's sent emoticon from a regular text message =)

Answer 1

I found the solution before Johnny Lowhunter wrote =)
But thanks for the answer anyway!
Here is the code that helped me convert the smiley to Unicode encoding.

for(let i = 0; string.length > i;i++){
console.log(string.charCodeAt(i).toString(16));
}