@ethereumjs/tx
Version:
Implementation of the various Ethereum Transaction Types
47 lines • 2 kB
JavaScript
import * as Legacy from "./legacy.js";
import { EthereumJSErrorWithoutCode } from '@ethereumjs/util';
/**
* The amount of gas paid for the data in this tx
*/
export function getDataGas(tx) {
return Legacy.getDataGas(tx) + getAccessListDataGas(tx);
}
/**
* Calculates the data gas cost for the access list of a tx
*/
function getAccessListDataGas(tx) {
const { common, accessList } = tx;
const accessListStorageKeyCost = common.param('accessListStorageKeyGas');
const accessListAddressCost = common.param('accessListAddressGas');
const totalSlots = accessList.reduce((sum, item) => sum + BigInt(item[1].length), 0n);
const addresses = BigInt(accessList.length);
let cost = addresses * accessListAddressCost + totalSlots * accessListStorageKeyCost;
// EIP-7981: add floor cost for access list bytes (20 bytes/address + 32 bytes/slot, 4 tokens/byte)
if (common.isActivatedEIP(7981)) {
const accessListBytes = addresses * 20n + totalSlots * 32n;
cost += common.param('totalCostFloorPerToken') * accessListBytes * 4n;
}
return cost;
}
/**
* Verifies an access list. Throws if invalid.
* @param tx - Transaction whose access list should be validated
*/
export function verifyAccessList(tx) {
const accessList = tx.accessList;
for (const accessListItem of accessList) {
if (accessListItem.length !== 2) {
throw EthereumJSErrorWithoutCode('Invalid EIP-2930 transaction: access list item should have 2 elements');
}
const [address, storageSlots] = accessListItem;
if (address.length !== 20) {
throw EthereumJSErrorWithoutCode('Invalid EIP-2930 transaction: address length should be 20 bytes');
}
for (const slot of storageSlots) {
if (slot.length !== 32) {
throw EthereumJSErrorWithoutCode('Invalid EIP-2930 transaction: storage slot length should be 32 bytes');
}
}
}
}
//# sourceMappingURL=eip2930.js.map