This EIP charges access lists for their data footprint, preventing the circumvention of the EIP-7623 floor pricing. This effectively reduces the worst-case block size by ~21% with minimal impact on users.
Access lists are only priced for storage but not for their data.
Furthermore, access lists can circumvent the EIP-7623 floor pricing by contributing to EVM gas while still leaving a non-negligible data footprint. This enables achieving the maximal possible block size by combining access lists with calldata at a certain ratio.
| Parameter | Value | Source |
|---|---|---|
ACCESS_LIST_ADDRESS_COST | 2400 | EIP-2930 |
ACCESS_LIST_STORAGE_KEY_COST | 1900 | EIP-2930 |
TOTAL_COST_FLOOR_PER_TOKEN | 16 | EIP-7976 |
Let access_list_bytes be the total byte count of addresses (20 bytes each) and storage keys (32 bytes each) in the access list.
Let access_list_data_cost = 64 * access_list_bytes (i.e. 1280 gas per address and 2048 gas per storage key). The 64 gas-per-byte rate matches the EIP-7976 calldata floor.
The access list data cost is added as a flat surcharge to the gas used calculation, leaving the EIP-2930 access_list_cost and the EIP-7976 floor calculation unchanged:
Any transaction with a gas limit below tx.gasUsed evaluated with execution_gas_used = 0 is considered invalid.
Access list data is always charged at floor rate (added to access_list_cost), and access list tokens are included in the floor calculation. This ensures:
This is a backwards incompatible gas repricing that requires a scheduled network upgrade.
Requires updates to gas estimation in wallets and nodes. Normal usage patterns remain largely unaffected.
This EIP closes a loophole that allows circumventing EIP-7623 floor pricing. Without this fix, attackers can achieve larger blocks than intended by combining access lists with calldata. All transaction data sources now contribute to the floor calculation consistently.
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