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EIP-8058 Contract Bytecode Deduplication Discount

DraftCorecreated 2025-10-221 later proposal build on itrequires EIP-2930

Reduces gas costs for deploying duplicate contract bytecode via access-list based mechanism

Authors: Carlos Perez (@CPerezz), Wei Han Ng (@weiihann), Guillaume Ballet (@gballet)

Depends on (1)

Proposals this one names in its requires field.

EIP-2930Optional access lists

Built on by (1)

Later proposals that name this one in their requires field.

EIP-8007Glamsterdam Gas Repricings

What the specification covers

AbstractMotivationSpecificationImplicit Deduplication via Access ListsCodeHash Access-Set ConstructionContract Creation Gas AccountingImplementation PseudocodeSame-Block DeploymentsEdge Case: Simultaneous New DeploymentsRationaleWhy Access-List Based Deduplication?Backwards CompatibilityReference ImplementationExample TransactionSecurity ConsiderationsGas Cost AccuracyDenial of ServiceCopyright

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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