flashbots

name	flashbots
description	MEV-Boost middleware for PoS Ethereum — proposer-builder separation, relays, timing games, and Builder API.
metadata	{"author":"hairy","version":"2026.02.24","source":"Generated from https://github.com/flashbots/mev-boost, scripts located at https://github.com/antfu/skills"}

Skill based on mev-boost (flashbots/mev-boost), generated at 2026-02-24.

MEV-Boost is open-source middleware run by validators to access a competitive block-building market. It implements out-of-protocol proposer-builder separation (PBS): relays aggregate blocks from builders, and MEV-Boost selects the highest bid for the consensus client.

Core References

Topic	Description	Reference
PBS overview	Roles (validators, relays, builders), block proposal flow	core-pbs-overview
Builder API	Endpoints (status, registerValidator, getHeader, getPayload), request flow	core-api

Features

Topic	Description	Reference
Relays and CLI	Relay URLs, network flags, min-bid, relay-check, timeouts, metrics	features-relays-config
Timing games	Delaying and repeating getHeader to capture better bids; YAML config	features-timing-games
YAML config	Config file path, hot reload, structure, relay list	features-config-yaml

Best Practices

Topic	Description	Reference
Validator and relay	Trust assumptions, relay selection, min-bid, proposer boost, security	best-practices-validator

Advanced

Topic	Description	Reference
test-cli	Generate validator data, register, getHeader, getPayload for testing	advanced-test-cli