check-ethereum-scanner
Version:
Safety checks for new Ethereum tokens
103 lines • 4.61 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.AccessLists = exports.checkMaxInitCodeSize = void 0;
const ethereumjs_util_1 = require("ethereumjs-util");
const types_1 = require("./types");
function checkMaxInitCodeSize(common, length) {
if (length > common.param('vm', 'maxInitCodeSize')) {
throw new Error(`the initcode size of this transaction is too large: it is ${length} while the max is ${common.param('vm', 'maxInitCodeSize')}`);
}
}
exports.checkMaxInitCodeSize = checkMaxInitCodeSize;
class AccessLists {
static getAccessListData(accessList) {
let AccessListJSON;
let bufferAccessList;
if (accessList && (0, types_1.isAccessList)(accessList)) {
AccessListJSON = accessList;
const newAccessList = [];
for (let i = 0; i < accessList.length; i++) {
const item = accessList[i];
const addressBuffer = (0, ethereumjs_util_1.toBuffer)(item.address);
const storageItems = [];
for (let index = 0; index < item.storageKeys.length; index++) {
storageItems.push((0, ethereumjs_util_1.toBuffer)(item.storageKeys[index]));
}
newAccessList.push([addressBuffer, storageItems]);
}
bufferAccessList = newAccessList;
}
else {
bufferAccessList = accessList !== null && accessList !== void 0 ? accessList : [];
// build the JSON
const json = [];
for (let i = 0; i < bufferAccessList.length; i++) {
const data = bufferAccessList[i];
const address = (0, ethereumjs_util_1.bufferToHex)(data[0]);
const storageKeys = [];
for (let item = 0; item < data[1].length; item++) {
storageKeys.push((0, ethereumjs_util_1.bufferToHex)(data[1][item]));
}
const jsonItem = {
address,
storageKeys,
};
json.push(jsonItem);
}
AccessListJSON = json;
}
return {
AccessListJSON,
accessList: bufferAccessList,
};
}
static verifyAccessList(accessList) {
for (let key = 0; key < accessList.length; key++) {
const accessListItem = accessList[key];
const address = accessListItem[0];
const storageSlots = accessListItem[1];
if (accessListItem[2] !== undefined) {
throw new Error('Access list item cannot have 3 elements. It can only have an address, and an array of storage slots.');
}
if (address.length != 20) {
throw new Error('Invalid EIP-2930 transaction: address length should be 20 bytes');
}
for (let storageSlot = 0; storageSlot < storageSlots.length; storageSlot++) {
if (storageSlots[storageSlot].length != 32) {
throw new Error('Invalid EIP-2930 transaction: storage slot length should be 32 bytes');
}
}
}
}
static getAccessListJSON(accessList) {
const accessListJSON = [];
for (let index = 0; index < accessList.length; index++) {
const item = accessList[index];
const JSONItem = {
address: '0x' + (0, ethereumjs_util_1.setLengthLeft)(item[0], 20).toString('hex'),
storageKeys: [],
};
const storageSlots = item[1];
for (let slot = 0; slot < storageSlots.length; slot++) {
const storageSlot = storageSlots[slot];
JSONItem.storageKeys.push('0x' + (0, ethereumjs_util_1.setLengthLeft)(storageSlot, 32).toString('hex'));
}
accessListJSON.push(JSONItem);
}
return accessListJSON;
}
static getDataFeeEIP2930(accessList, common) {
const accessListStorageKeyCost = common.param('gasPrices', 'accessListStorageKeyCost');
const accessListAddressCost = common.param('gasPrices', 'accessListAddressCost');
let slots = 0;
for (let index = 0; index < accessList.length; index++) {
const item = accessList[index];
const storageSlots = item[1];
slots += storageSlots.length;
}
const addresses = accessList.length;
return addresses * accessListAddressCost + slots * accessListStorageKeyCost;
}
}
exports.AccessLists = AccessLists;
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