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EIP-8379 Top-up Sync

DraftCorecreated 2026-08-06

CL-driven EL synchronization by exposing the execution client head and distinguishing missing state from missing history in the engine API

Authors: Jacek Sieka (@arnetheduck), Dustin (@tersec), Tamaghna Choudhuri (@RazorClient)

What the specification covers

AbstractMotivationSpecificationengine_getSyncStatusRequestResponsePayload status disambiguationTop-up sync procedureInterface migrationRationaleWhy a new method?A single head rather than a set of headsNew status value rather than a new fieldTwo headsBatched payload deliveryBackwards CompatibilitySecurity ConsiderationsCopyright

This proposal declares no Solidity interface, so there is nothing to compute. It may be a core protocol change, a meta proposal, or written in prose only.

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