De-hardcode ConwayEra, parametrise & use IsBabbageBasedEra / IsConwayBasedEra where applicable

[Swordlash]

As in the title.
I'd like to use Convex in my protocol, I think it's a cool library, but I don't feel like hardcoding ConwayEra everywhere where I use Convex tools.

[j-mueller]

I'll have a look - but in my experience, as soon as the new era lands we don't care about the old eras anymore. Yes there's a transition period but after that it's okay to have a single hard-coded era.

[Swordlash]

I have a fork of Convex and it took me about 2 days to era generalise it. It comes handy when testing hard forks in a transitional period. In Axo we had the same codebase running in parallel for 2 months on preview / preprod Conway and prod Babbage. But I understand if that’s too much of a hassle.

[j-mueller]

I agree that era transitions are a concern - I actually had a branch of sc-tools that we used for the transition of Djed from babbage to conway era (here) I just wasn't sure if the added complexity is worth it in the majority of time where there is no era transition to be expected.

Is there some code you could share from your work on generalising it?

[Swordlash]

It's part of a private multirepo so I don't think I can share only a folder in GitHub. I've made a zip.
sc-tools.zip
I’ve done some more opinionated changes there, you can ignore.

[j-mueller]

Thanks for the file. I finished the changes, just need to get the tests to pass. PR here: #211

[j-mueller]

Closed in #211