How to generate binary signature / hash using private key in Wappler?

Wappler General Need Help
3

Thanks. I haven’t tried custom formatters in Wappler before. I assume it’s these instructions:
Wappler Extensibility - Build Custom Wappler Extensions - Docs / Wappler Extensibility - Wappler Community
Writing Custom Modules and Formatters (NodeJS) - Docs / Wappler Extensibility - Wappler Community
Wappler Extensibility - Writing Custom Modules and Formatters for Server Connect - Docs / Wappler Extensibility - Wappler Community

I’ve looked through and it’s not clear to me how I actually call the function from within the Server Connect screen (the normal server actions one)? Will it appear as an option when I add an action, or is there a specific action I use to call it?

Also where can I see if Wappler has a formatter for SHA-256 hash? I couldn’t see one - only the Argon hash. If it doesn’t then I can use the crypto module in Node as part of the formatter but probably easier if it’s built in.

Thanks