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MEV Boost

1 min read
Pronunciation
[M-E-V boost]
Analogy
Like an art collector hiring specialized curators to assemble the most valuable painting collection, then signing off on the final exhibit.
Definition
A middleware component that allows Ethereum validators to outsource block production to specialized block builders through an auction, separating block construction from block signing to capture MEV in a decentralized, permissionless fashion.
Key Points Intro
MEV Boost democratizes access to MEV revenue by enabling builder–validator separation.
Key Points

Builder–validator separation: Validators fetch blocks from builders.

Relay network: Connects builders to validators via authenticated relays.

Auction: Builders bid to propose blocks maximizing validator rewards.

Permissionless: Any builder can participate in the auction.

Example
An Ethereum validator runs mev-boost client, receives block proposals from multiple builders, and selects the highest-paying one to sign and attest.
Technical Deep Dive
Validators run a relay client connecting to builder relays via gRPC. Builders submit signed blinded block proposals with blinded payloads. On block slot, relay reveals full payload to validator after selection.
Security Warning
Reliance on few relays can centralize block building; run multiple relay endpoints.
Caveat
Blinded blocks defer payload reveal, adding implementation complexity.
Related Terms
Validator

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