MyCrypto/common/libs/validators.ts

171 lines
4.4 KiB
TypeScript

import { toChecksumAddress } from 'ethereumjs-util';
import { RawTransaction } from 'libs/transaction';
import WalletAddressValidator from 'wallet-address-validator';
import { normalise } from './ens';
export function isValidETHAddress(address: string): boolean {
if (!address) {
return false;
}
if (address === '0x0000000000000000000000000000000000000000') {
return false;
}
return validateEtherAddress(address);
}
export function isValidBTCAddress(address: string): boolean {
return WalletAddressValidator.validate(address, 'BTC');
}
export function isValidHex(str: string): boolean {
if (typeof str !== 'string') {
return false;
}
if (str === '') {
return true;
}
str =
str.substring(0, 2) === '0x'
? str.substring(2).toUpperCase()
: str.toUpperCase();
const re = /^[0-9A-F]+$/g;
return re.test(str);
}
export function isValidENSorEtherAddress(address: string): boolean {
return isValidETHAddress(address) || isValidENSAddress(address);
}
export function isValidENSName(str: string) {
try {
return (
str.length > 6 && normalise(str) !== '' && str.substring(0, 2) !== '0x'
);
} catch (e) {
return false;
}
}
export function isValidENSAddress(address: string): boolean {
try {
const normalized = normalise(address);
const tld = normalized.substr(normalized.lastIndexOf('.') + 1);
const validTLDs = {
eth: true,
test: true,
reverse: true
};
if (validTLDs[tld]) {
return true;
}
} catch (e) {
return false;
}
return false;
}
function isChecksumAddress(address: string): boolean {
return address === toChecksumAddress(address);
}
// FIXME we probably want to do checksum checks sideways
function validateEtherAddress(address: string): boolean {
if (address.substring(0, 2) !== '0x') {
return false;
} else if (!/^(0x)?[0-9a-f]{40}$/i.test(address)) {
return false;
} else if (
/^(0x)?[0-9a-f]{40}$/.test(address) ||
/^(0x)?[0-9A-F]{40}$/.test(address)
) {
return true;
} else {
return isChecksumAddress(address);
}
}
export function isValidPrivKey(privkey: string | Buffer): boolean {
if (typeof privkey === 'string') {
return privkey.length === 64;
} else if (privkey instanceof Buffer) {
return privkey.length === 32;
} else {
return false;
}
}
export function isValidEncryptedPrivKey(privkey: string): boolean {
if (typeof privkey === 'string') {
return privkey.length === 128 || privkey.length === 132;
} else {
return false;
}
}
export function isPositiveIntegerOrZero(num: number): boolean {
if (isNaN(num) || !isFinite(num)) {
return false;
}
return num >= 0 && parseInt(num.toString(), 10) === num;
}
export function isValidRawTx(rawTx: RawTransaction): boolean {
const propReqs = [
{ name: 'nonce', type: 'string', lenReq: true },
{ name: 'gasPrice', type: 'string', lenReq: true },
{ name: 'gasLimit', type: 'string', lenReq: true },
{ name: 'to', type: 'string', lenReq: true },
{ name: 'value', type: 'string', lenReq: true },
{ name: 'data', type: 'string', lenReq: false },
{ name: 'chainId', type: 'number', lenReq: false }
];
// ensure rawTx has above properties
// ensure all specified types match
// ensure length !0 for strings where length is required
// ensure valid hex for strings
// ensure all strings begin with '0x'
// ensure valid address for 'to' prop
// ensure rawTx only has above properties
for (const prop of propReqs) {
const value = rawTx[prop.name];
if (!rawTx.hasOwnProperty(prop.name)) {
return false;
}
if (typeof value !== prop.type) {
return false;
}
if (prop.type === 'string') {
if (prop.lenReq && value.length === 0) {
return false;
}
if (value.length && value.substring(0, 2) !== '0x') {
return false;
}
if (!isValidHex(value)) {
return false;
}
}
}
if (!isValidETHAddress(rawTx.to)) {
return false;
}
if (Object.keys(rawTx).length !== propReqs.length) {
return false;
}
return true;
}
// Full length deterministic wallet paths from BIP44
// https://github.com/bitcoin/bips/blob/master/bip-0044.mediawiki
// normal path length is 4, ledger is the exception at 3
export function isValidPath(dPath: string) {
// TODO: use a regex to detect proper paths
const len = dPath.split("'/").length;
return len === 3 || len === 4;
}