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EIP-8304 Trustless log and transaction index

DraftCorecreated 2026-06-17requires EIP-4788

Store the root hashes of index tables in a system contract to allow efficient trustless proofs of log and transaction lookups

Author: Zsolt Felföldi (@zsfelfoldi)

Depends on (1)

Proposals this one names in its requires field.

EIP-4788Beacon block root in the EVM

What the specification covers

AbstractMotivationTrustless end user accessCross-chain communicationSynergy with ZKP batched pre-checksA new form of stateSpecificationIndex tablesEntry typesIndexing rulesIndex table exampleTable root hash calculationBlock processingInitializing after chain/state syncFuture stateless/execution proof implementationIndex contractgetsetBytecodeDeploymentHistory index contractAlternative index contracts[EIP-161](./eip-161.md) handlingGas costsRationaleNumber of table levels and size of ring buffersBackwards 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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