@ethereumjs/tx
Version:
Implementation of the various Ethereum Transaction Types
51 lines • 2.15 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.getDataGas = getDataGas;
exports.verifyAccessList = verifyAccessList;
const Legacy = require("./legacy.js");
const util_1 = require("@ethereumjs/util");
/**
* The amount of gas paid for the data in this tx
*/
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
*/
function verifyAccessList(tx) {
const accessList = tx.accessList;
for (const accessListItem of accessList) {
if (accessListItem.length !== 2) {
throw (0, util_1.EthereumJSErrorWithoutCode)('Invalid EIP-2930 transaction: access list item should have 2 elements');
}
const [address, storageSlots] = accessListItem;
if (address.length !== 20) {
throw (0, util_1.EthereumJSErrorWithoutCode)('Invalid EIP-2930 transaction: address length should be 20 bytes');
}
for (const slot of storageSlots) {
if (slot.length !== 32) {
throw (0, util_1.EthereumJSErrorWithoutCode)('Invalid EIP-2930 transaction: storage slot length should be 32 bytes');
}
}
}
}
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