Support mev-boost in prysm

[come-maiz]

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

✔️ Builder API
❓ local fallback when builder not available
❓ local profit comparison
✔️ circuit breaker

@terencechain prepared this guide: https://hackmd.io/@prysmaticlabs/BJeinxFsq

[come-maiz]

@terencechain, @james-prysm, and @kasey are the humans writing the code for mev-boost in prysm.

Issues in the prysm repository

• Support builder spec prysmaticlabs/prysm#10593

Merged work

• Builder client prysmaticlabs/prysm#10703
• Validator client builder support prysmaticlabs/prysm#10749
• validator registration request bug: reusing public keys  prysmaticlabs/prysm#10883
• changing gaslimit to validator registration prysmaticlabs/prysm#10992
• Batch build API requests for RegisterValidator prysmaticlabs/prysm#11002
• Minor UX improvement to validator registration prysmaticlabs/prysm#11004
• Simplify Push Proposer settings prysmaticlabs/prysm#11005
• Validator Registration: use cached signatures if certain properties don't change. prysmaticlabs/prysm#11014
• Enforce a 1s timeout for block builder reply prysmaticlabs/prysm#11021
• builder client: Revert key batching PR #11002 prysmaticlabs/prysm#11022
• Check validator has registration before getting header prysmaticlabs/prysm#11023
• Remove builder status check for block proposal prysmaticlabs/prysm#11052
• Validate builder signature for Bid prysmaticlabs/prysm#11124
• Validate builder header prysmaticlabs/prysm#11195
• Builder API Error Log Simplification prysmaticlabs/prysm#11199
• Issue validator warning when beacon node does not use builder prysmaticlabs/prysm#11203
• Add warning about block delay when outsourcing block cosntruction prysmaticlabs/prysm#11222
• Add circuit breaker for relayer/builder prysmaticlabs/prysm#11215
• Builder: check payload and header HTR root match prysmaticlabs/prysm#11223
• Misc builder fixes prysmaticlabs/prysm#11228
• Beacon api: fix get blind block prysmaticlabs/prysm#11304
• Builder: filter header with 0 bid and empty tx root prysmaticlabs/prysm#11313
• Fix can propose blind block prysmaticlabs/prysm#11346
• Tests for builder service prysmaticlabs/prysm#11214
• Don't hard shutdown if mev-boost / relay is not available prysmaticlabs/prysm#11380
• Better log fee recipient mismatch prysmaticlabs/prysm#11395

[metachris]

Implementation of the builder-specs is now complete in Prysm, and merged in the develop branch.

Instructions:

• On the beacon node, add your relay or mev-boost. Example: --http-mev-relay=<mev_boost_service>
• On the validator client, add your fee recipient. Example: --suggested-fee-recipient=0xD9A5179F091d85051d3C982785Efd1455CEc8699

[james-prysm]

we added another flag used with suggested-fee-recipient called enable-validator-registration to enable this. you can see what happened in my latest PR. currently only in develop.

[come-maiz]

Issues found during testing:

• ERROR: no such package '@llvm_toolchain//': Unknown LLVM release: clang+llvm-10.0.0-x86_64-linux-gnu-ubuntu-16.04.tar.xz prysmaticlabs/prysm#8072 (comment)
• With kiln config, ERROR There were some issues parsing the config from a yaml file error=yaml prysmaticlabs/prysm#10999
• powchain: Could not log ttd status error=json prysmaticlabs/prysm#11000
• How to import the validator keys in kiln? prysmaticlabs/prysm#11001

[james-prysm]

@ElOpio responded to the kiln question, wondering if that answered you.

[come-maiz]

Yes! Thanks @james-prysm. I'm getting a new testing machine and then I will give a try to everything and update the testing guide. I'll report on your repo any findinds.