Proposer-builder separation | ethereum.org

Learn how and why Ethereum validators will split their block building and block broadcasting responsibilities.

Page last update: June 24, 2026 r (opens in a new tab) p (opens in a new tab) n (opens in a new tab) + 5 See contributors Copy .md Copy .md Edit page (opens in a new tab) Present-day Ethereum validators create and broadcast blocks. They bundle together transactions that they have heard about through the gossip network and package them into a block that is sent out to peers on the Ethereum network. Proposer-builder separation (PBS) splits these tasks across multiple validators. Block builders become responsible for creating blocks and offering them to the block proposer in each slot. The block

related reading

• State of research: increasing censorship resistance of transactions under proposer/builder separation (PBS) - HackMDnotes.ethereum.org
• Why enshrine Proposer-Builder Separation? A viable path to ePBS - Proof-of-Stake - Ethereum Researchethresear.ch
• The Hitchhiker's Guide to Ethereum - Delphi Digitalmembers.delphidigital.io
• Relays in a post-ePBS world - Proof-of-Stake - Ethereum Researchethresear.ch
• Why run mev-boost? | Flashbots Writingswritings.flashbots.net
• Unbundling PBS: Towards protocol-enforced proposer commitments (PEPC) - Economics - Ethereum Researchethresear.ch
• Approaches to MEV: Ethereum vs Cosmos | Reveriereverie.ooo
• MEV-Boost using EigenLayer - HackMDhackmd.io
• Exploring Protocol-Enforced Proposer Commitments(PEPC) — YQmirror.xyz
• Why run mev-boost? | Flashbots Writingswritings.flashbots.net
• Should Ethereum be okay with enshrining more things in the protocol?vitalik.eth.limo
• Concurrent Block Proposers in Ethereum - Block proposer - Ethereum Researchethresear.ch