This look interesting and it's in Java

The code seems well written and easy to follow. I'll study see if I can contribute to it in anyway. Perhaps I'll start by adding in a new coin.
Thank you for making it open source.
Awesome

If you add a new coin, look at my fork of Bitcoinj:
https://github.com/mappum/altcoinjEach coin has a
NetworkParameters class in the
params package.
Just letting you know, I'd prefer coins to be ones that have significant volume, I don't want to just add every boring altcoin. Some important ones that need to be added are Nubits and Ethereum (but those are a little more complicated).