Improve client compatibility

[TobiWo]

/release

Summary

Currently eth-duties only supports Teku and Lighthouse due to the fact the requests were not implemented following the official beacon api spec. This PR will add compatibility for:

• Nimbus
• Lodestar
• Prysm

Note on Lodestar

I needed to add a specific change how requests are sent because Lodestar does not support URI percent-encoding currently. This was reported as bug in the Lodestar github repository. If it will be added/fixed, I will adapt eth-duties as well (back to usage of percent-encoding for all requests).

Update on Lodestar specifics

It turns out that Lodestar is the only client implementing percent-encoding correctly or using the right library for handling requests. The , is a reserved delimiting character which therefore should not be encoded. Fur further details please follow the discussion in the aforementioned issue in the Lodestar repository.

Closes #32

[TobiWo]

@nflaig Thanks for reviewing. I'm currently waiting for @LuisNaldo7 to finish the review on #40 . If this is done and I rebased the changes into this branch I would ask you to approve this PR which will then trigger a new release 🙌 .

[nflaig]

@TobiWo sounds good, will give it a final review after rebase

draft pr

[TobiWo]

@nflaig Sorry for the delay. This PR is now ready for review.

[nflaig]

lgtm

[TobiWo]

@nflaig Unfortunately a review is only valid when you have write access. Therefore, if you like, I would add you as collaborator so you are able to do valid reviews in the future. Don't know if you have time for that?

[nflaig]

@TobiWo Thanks for the offer but I won't be able to find the time right now to familiarize myself with the code base to do proper reviews. That being said, feel free to just tag me on any PRs related to Lodestar or any other CL as well if you feel like my feedback would be useful.