beacon/light: blsync'er alternate #28642
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Co-authored-by: lightclient <lightclient@protonmail.com> Co-authored-by: Zsolt Felföldi <zsfelfoldi@gmail.com>
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closing favor of #28822 |
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Parts of this is copied directly from Zsolt's blsync implementation.
This is mostly working now. If you want to try it out you can run the following:
$ geth --sepolia --beacon.api=https://lodestar-sepolia.chainsafe.io --beacon.wsc=$(curl -X GET 'https://lodestar-sepolia.chainsafe.io/eth/v1/beacon/headers/finalized' | jq ".data.root" | sed 's/"//g') --log.vmodule="beacon/light/*=5"Only supports Sepolia at the moment, but easy to add some more configs if this is a direction we want to go.
I think this conveys my perspective that we can drive geth via a light client w/o adding much complexity. This change is only around 1600 diff to the LOC in geth whereas the other approach is 5000+ LOC.
Obviously there are limitations of this approach and is nowhere as fully featured as Zsolt's- but as I've argued in the past, I don't think we should provide a thorough light client picture for users and so this PR provides all the functionality that we could need in an extremely simple and easy to understand format.