Ethereum core developers have officially chosen EIP-7732: Enshrined Proposer-Builder Separation (ePBS) as the consensus layer headliner for the upcoming Glamsterdam upgrade. This decision, finalized in All Core Developers Consensus Call #162, is a significant step toward decentralizing block building and reducing proposer censorship risks.
Why ePBS Matters?
Ethereum’s current Proposer-Builder Separation (PBS) model depends on external relays and builder markets, which introduces centralization risks. EIP-7732 enshrines PBS into the protocol, removing the need for third-party relays and providing a trustless, censorship-resistant method for proposers to source blocks from builders.
Benefits include:
- Reduced censorship risk by eliminating trusted intermediaries.
- Greater trustlessness with protocol-level enforcement.
- Improved MEV handling through competitive builder markets.
During ACDC #162, candidate Glamsterdam features were evaluated on readiness, test coverage, alignment, and ecosystem impact. ePBS earned Scheduled for Inclusion (SFI) status, while Fork-choice enforced Inclusion Lists (FOCIL) was marked Consider for Inclusion (CFI).
Developers emphasized ePBS’s maturity and independent implementability.
Community & Stakeholder Feedback
A Notion report compiling ecosystem feedback revealed:
- 9 stakeholders ranked ePBS as their first choice.
- 3 stakeholders ranked it second.
- Strong emphasis on trustless proposer-builder exchange and MEV decentralization.
- Execution layer contributors noted ePBS could also boost execution throughput indirectly.
With ePBS confirmed as the consensus layer headliner, Glamsterdam’s scope now includes finalizing the technical specification, running dedicated devnets to simulate proposer-builder workflows without relays, and conducting EIP synergy analysis to plan future integration with FOCIL for enhanced inclusion list enforcement.
Conclusion
Selecting EIP-7732 (ePBS) as Glamsterdam’s headliner is a decisive step toward decentralizing Ethereum’s block building process. By enshrining PBS at the protocol level, Ethereum strengthens its censorship resistance, increases transparency in builder markets, and sets the stage for more equitable MEV distribution. The coming months will focus on finalizing specifications, conducting targeted devnet tests, and preparing the network for a seamless integration of ePBS in Glamsterdam.
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