EIP-7976 + EIP-7981: calldata floor increase and access-list data cost - #2877
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EIP-7976 + EIP-7981: calldata floor increase and access-list data cost#2877anvacaru wants to merge 2 commits into
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… eip-7981 access-list data cost EIP-7976 raises the calldata floor to a flat 64 gas/byte: Gtxdatafloor becomes 16 at Amsterdam and the floor token count changes from EIP-7623's zero + 4*nonzero to 4*len(data), gated on Ghaseip7976. EIP-7981 charges access lists for their data footprint at the same 64 gas/byte rate (1280 per address, 2048 per storage key): the tokens join the floor via a new Ctxfloor argument, and the equivalent surcharge is deducted per entry in #loadAccessListAux and required by the transaction admission check, gated on Ghaseip7981. The EIP-2930 per-entry prices are unchanged, as the EIP specifies. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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Implements the two Scheduled Amsterdam data-pricing EIPs. EIP-7976 raises the calldata floor to a flat 64 gas per byte, and EIP-7981 closes the access-list loophole by charging access lists for their data footprint at the same rate, so they can no longer be used to bypass floor pricing.
Changes:
Gtxdatafloor < AMSTERDAM > => 16, and aGhaseip7976-gatedCtxfloorrule whose token count is4 * len(data)— EIP-7976 redefines the floor tokens from EIP-7623'szero + 4*nonzero, so the bump alone is not sufficient.Ghaseip7981-gated access-list data cost of 64 gas per byte (1280 per address, 2048 per storage key), applied in the three places the reference implementation requires it: the floor (newCtxfloortoken argument fed by#accessListFloorTokens), the per-entry<callGas>deduction in#loadAccessListAux, and the intrinsic side of the transaction admission check via#accessListDataCost.Gaccesslistaddress2400,Gaccessliststoragekey1900) are deliberately unchanged, as EIP-7981 specifies. The higher Amsterdam values belong to EIP-8038, which is currently not confirmed as part of the Glamsterdam hardfork (current status is Considered for Inclusion).The
for_amsterdam/amsterdam/eip7976_*sub-cases that remain masked are dependent on EIP-2780, not on this implementation. Those fixtures encode the 7976 floor on top of the 2780-decomposed transaction base, so a 2780-less branch computes a higher floor and rejects transactions that the fixtures expect to succeed. Concretely, forfull_gas_consumption[exact_gas-type_0_protected](1042 non-zero calldata bytes,gasLimit81688), the floor here is21000 + 16*4168 = 87688, above the gas limit, while with 2780'sGtxbase = 12000it is 78688 and the transaction is valid.