Can we create server side custom formatters?

@George, I would like to create a simple server side formatter to generate random bytes. I added what I wanted to cypto_rules.js and crypto.php and the custom formatter displays in Wappler Editor and also updates the appropriate files on my server. So all is working as desired at the moment.

Will this be overwritten by a Wappler upgrade?

Is there a better way for us to enhance Wappler with items like this?