Wish Punycode Library

for my next project, I need a punycode to idn library.

converting non alphanumeric characters (characters of all foreign languages) into idn.
for example
the word :
שלום
will be converted to : xn--9dbne9b

I have deep in archive a working php code that does that, I will be happy to send it to any developer.
It will be great if someone can make this feature into a b4x lib.

converter example (online) can be found here
https://www.punycoder.com/

and I also found an open source in java here :
https://cdnjs.com/libraries/punycode

???

Here is the php code I have , it will be great if someone can help and make this happen.....

Thank you
as I understood (maybe didn't) , the example function convert idn to ascii .
How would I convert it back ? (ASCII to idn)

Please start a new thread for this in the questions forum.