Add EIP: Contract Bytecode Deduplication Discount #10585
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This proposal introduces a gas discount for contract deployments when the bytecode being deployed already exists in the state. The mechanism extends EIP-2930 access lists with an optional checkCodeHash flag to enable deterministic deduplication checks without breaking consensus. Key features: - Access-list based deduplication via checkCodeHash flag - Avoids GAS_CODE_DEPOSIT * L costs for duplicate deployments - Solves database divergence issues across different sync modes - Becomes particularly relevant with EIP-8037's increased gas costs This EIP is extracted from the original EIP-8037 proposal to allow independent review and adoption.
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EIPS/eip-draft.md
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| Any address included in the access list automatically contributes to deduplication. This provides automatic gas optimization without requiring explicit flags or special handling. | ||
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| 5. Avoids chain split risks: | ||
| Since no new transaction structure is introduced, pre-fork and post-fork nodes handle the same transactions identically (just with different gas accounting post-fork). This eliminates the risk of chain splits from nodes rejecting transactions with unknown fields. |
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this is no longer true I think, the pre-fork part.
- Simplify deduplication logic to more concise form - Remove pre-fork/post-fork language from chain split rationale - Clarify that only gas accounting changes at fork activation Co-authored-by: Guillaume Ballet <[email protected]>
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The commit f0e9b17 (as a parent of 1d5c3ec) contains errors. |
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@lightclient seems auto-merge was disabled. Can you manually merge? |
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This proposal introduces a gas discount for contract deployments when the bytecode being deployed already exists in the state. The mechanism extends EIP-2930 access lists with an optional checkCodeHash flag to enable deterministic deduplication checks without breaking consensus.
Key features:
This EIP is extracted from the original EIP-8037 proposal to allow independent review and adoption.
This EIP doesn't modify any interaction between users and the chain if not used. Meaning, users will get discounts if they use the EIP. They'll pay the same exact price as they do now if they don't use this EIP.