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EIP-8297 Partitioned Binary Tree

DraftCorecreated 2026-06-111 later proposal build on it

Switch Ethereum state tree to a partitioned binary tree

Authors: Vitalik Buterin (@vbuterin), Guillaume Ballet (@gballet), Dankrad Feist (@dankrad), Ignacio Hagopian (@jsign), Kevaundray Wedderburn (@kevaundray), Tanishq Jasoria (@tanishqjasoria), Gajinder Singh (@g11tech), Danno Ferrin (@shemnon), Piper Merriam (@pipermerriam), Gottfried Herold (@GottfriedHerold), Wei Han Ng (@weiihann), Carlos Perez (@CPerezz)

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Later proposals that name this one in their requires field.

EIP-8347Offline State Migration to the PBT

What the specification covers

AbstractMotivationSpecificationNotable changes from the hexary structureTree structureNode merkelizationInsertion and deletionMaximum key lengthZonesTree embeddingHeader valuesDelegationCodeStorageZero values and deletionForkRationaleSingle tree with zonesStorage layoutContent-addressed codeSNARK friendliness and post-quantum securityArity-2Tree depthCollapsing zero and absentState expiryBackwards CompatibilityTest CasesSecurity 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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