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EIP-8289 Multi-block Access List Warming

DraftCorecreated 2026-05-03requires EIP-2929, EIP-2930, EIP-2935, EIP-3651, EIP-7702, EIP-7928

Pre-warm the per-transaction access list with items from the previous 256 block access lists

Author: Toni Wahrstätter (@nerolation)

Depends on (6)

Proposals this one names in its requires field.

EIP-2929Gas cost increases for state access opcodesEIP-2930Optional access listsEIP-2935Serve historical block hashes from stateEIP-3651Warm COINBASEEIP-7702Set Code for EOAsEIP-7928Block-Level Access Lists

What the specification covers

AbstractMotivationSpecificationConstantsItem typeState: the warm-access multisetPer-block transitionCommitmentAccess-list initialization in transactionsPricingRevert semanticsGenesis and activationRationaleWhy a refcounted multisetWhy 256 blocksReuse of EIP-7928 BALsBinary SMT (not Merkle Patricia Trie (MPT)) and SHA-256 (not Keccak)Why a separate wam_rootNo new gas constantsBackwards CompatibilityTest CasesSecurity ConsiderationsState growth and DoSMemory pressureReorg behaviorLight/stateless clientsCopyright

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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