Support mev-boost in lodestar

[come-maiz]

Here we track the support of mev-boost in lodestar.

[come-maiz]

@g11tech, @dapplion, and @tuyennhv are the humans writing the code for mev-boost in lodestar.

Issues in the lodestar repository

• Mev Boost / flashbots integration tracker ChainSafe/lodestar#3953
• Merge 🐼 Tracker ChainSafe/lodestar#3945

Merged work

• Mev/Builder api integration ChainSafe/lodestar#3969

[g11tech]

usage doc: https://github.com/ChainSafe/lodestar/blob/unstable/docs/usage/mev-integration.md

tl-dr:

1. Provide lodestar BN with a Builder endpoint (which corresponds to the network you are running) via these additional flags:

--builder.enabled --builder.urls <builder/relay/boost url>

2. Run lodestar VC with these additional flags

--builder.enabled --defaultFeeRecipient <your ethereum address>

[come-maiz]

Issues found during testing:

• MaxListenersExceededWarning: Possible EventTarget memory leak detected. ChainSafe/lodestar#4394
• error: Error updating eth1 chain cache Timeout request ChainSafe/lodestar#4395
• Chain logs "expected" errors ChainSafe/lodestar#3062 (comment)

[g11tech]

Issues found during testing:

* [MaxListenersExceededWarning: Possible EventTarget memory leak detected. ChainSafe/lodestar#4394](https://github.com/ChainSafe/lodestar/issues/4394)

* [error: Error updating eth1 chain cache  Timeout request ChainSafe/lodestar#4395](https://github.com/ChainSafe/lodestar/issues/4395)

* [Chain logs "expected" errors ChainSafe/lodestar#3062 (comment)](https://github.com/ChainSafe/lodestar/issues/3062#issuecomment-1211457758)

thanks @come-maiz for reporting issues, most of these are harmless/self recoverable issues not liked with mev-boost, we have plans to improve our error UX and will keep you updated as we improve the experience. Do update any other issues you are facing. 🙏

[come-maiz]

Thank you @g11tech. My beacon node has 3 more days left for syncing. I'll share anything weird that happens.

[g11tech]

Thank you @g11tech. My beacon node has 3 more days left for syncing. I'll share anything weird that happens.

which networ are you syncing? may be I can provide you with a weak subjectivity sync encpoint to start off easily with

[come-maiz]

I'm in kiln. Now I should actually stop and restart with goerli. And yes please, how do I make this faster? :)

[g11tech]

I'm in kiln. Now I should actually stop and restart with goerli. And yes please, how do I make this faster? :)

DM me on discord pls will share you the endpoint (since its not for mass public consumption)