EIPs

EIP-2930 — Optional access lists

eips.ethereum.org/EIPS/eip-2930

The first typed transaction (0x01) and the access-list data structure every later type (1559, 4844, 7702) reuses. An access list pre-declares the (address, storage_keys) tuples a transaction will touch, trading a calldata surcharge for cheaper post-Berlin opcode costs.

import {
  accessListSchema,
  accessListEntrySchema,
  transaction2930UnsignedSchema,
  transaction2930SignedSchema,
  ACCESS_LIST_ADDRESS_COST,
  ACCESS_LIST_STORAGE_KEY_COST,
  FORK_BLOCK,
} from "@ethernauta/eip/2930";

Surface

Access list

Export	Purpose
`accessListEntrySchema`, `AccessListEntry`	One `(address, storageKeys[])` tuple.
`accessListSchema`, `AccessList`	The full list.

Used by every typed transaction in the library: 1559, 4844, 7702 all import this schema from here.

Wire format

Export	Purpose
`transaction2930UnsignedSchema`, `Transaction2930Unsigned`	Type-1 pre-signing payload.
`transaction2930SignedSchema`, `Transaction2930Signed`	Type-1 signed envelope.

Spec constants

Export	Value	Source
`ACCESS_LIST_ADDRESS_COST`	`2400n`	Per-address gas cost.
`ACCESS_LIST_STORAGE_KEY_COST`	`1900n`	Per-storage-key gas cost.
`FORK_BLOCK`	`12244000n`	Berlin activation.

Where this used to live

The access-list schema and the type-1 codec previously sat under @ethernauta/eth/core/transaction/. They moved here as part of the rule “if the symbol is defined in the EIP paper, it lives in packages/eip/src/<n>/“.

Knock-on effect: every other typed-tx schema in this monorepo now imports accessListSchema from @ethernauta/eip/2930 instead of re-declaring it. Single source of truth for the access-list shape.

When dapps need this

Building access lists. eth_createAccessList (still in @ethernauta/eth) returns an AccessList. The schema validates the response.
Composing typed transactions. When you construct a 1559 or 4844 transaction by hand, the accessList field is this schema’s type.
Cost modeling. The two cost constants let you predict the calldata premium an access list adds before deciding whether to include one.