manu on Nostr: Someone know how to convert an hex256 key to the nostr format "nsecxxxx" ? I can ...

Someone know how to convert an hex256 key to the nostr format "nsecxxxx" ?

I can generate a nostr key using `openssl rand -hex 32` and it's working to log-in. I can then find my nsec key. But I want to understand the algorithm used to pass from one to another.