@ethereumjs/tx
Version:
Implementation of the various Ethereum Transaction Types
54 lines • 2.66 kB
JavaScript
import * as EIP2930 from "./eip2930.js";
import { EthereumJSErrorWithoutCode, MAX_INTEGER, MAX_UINT64, bytesToBigInt, validateNoLeadingZeroes, } from '@ethereumjs/util';
/**
* The amount of gas paid for the data in this tx
*/
export function getDataGas(tx) {
const eip2930Cost = EIP2930.getDataGas(tx);
const eip7702Cost = BigInt(tx.authorizationList.length * Number(tx.common.param('perEmptyAccountCost')));
return eip2930Cost + eip7702Cost;
}
/**
* Checks if the authorization list is valid. Throws if invalid.
* @param tx - Transaction whose authorization list should be validated
*/
export function verifyAuthorizationList(tx) {
const authorizationList = tx.authorizationList;
if (authorizationList.length === 0) {
throw EthereumJSErrorWithoutCode('Invalid EIP-7702 transaction: authorization list is empty');
}
for (const item of authorizationList) {
if (item.length !== 6) {
throw EthereumJSErrorWithoutCode('Invalid EIP-7702 transaction: authorization list item should have 6 elements');
}
for (const member of item) {
// This checks if the `member` is a list, not bytes
// This checks that the authority list does not have any embedded lists in it
if (Array.isArray(member)) {
throw EthereumJSErrorWithoutCode('Invalid EIP-7702 transaction: authority list element is a list, not bytes');
}
}
const [chainId, address, nonce, yParity, r, s] = item;
validateNoLeadingZeroes({ yParity, r, s, nonce, chainId });
if (address.length !== 20) {
throw EthereumJSErrorWithoutCode('Invalid EIP-7702 transaction: address length should be 20 bytes');
}
if (bytesToBigInt(chainId) > MAX_INTEGER) {
throw EthereumJSErrorWithoutCode('Invalid EIP-7702 transaction: chainId exceeds 2^256 - 1');
}
if (bytesToBigInt(nonce) > MAX_UINT64) {
throw EthereumJSErrorWithoutCode('Invalid EIP-7702 transaction: nonce exceeds 2^64 - 1');
}
const yParityBigInt = bytesToBigInt(yParity);
if (yParityBigInt >= BigInt(2 ** 8)) {
throw EthereumJSErrorWithoutCode('Invalid EIP-7702 transaction: yParity should be fit within 1 byte (0 - 255)');
}
if (bytesToBigInt(r) > MAX_INTEGER) {
throw EthereumJSErrorWithoutCode('Invalid EIP-7702 transaction: r exceeds 2^256 - 1');
}
if (bytesToBigInt(s) > MAX_INTEGER) {
throw EthereumJSErrorWithoutCode('Invalid EIP-7702 transaction: s exceeds 2^256 - 1');
}
}
}
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