MyCrypto/common/utils/keystore.ts

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import { fromPrivateKey, IFullWallet, fromV3 } from 'ethereumjs-wallet';
import { isValidPrivKey } from 'libs/validators';
import { stripHexPrefix } from 'libs/values';
import { makeBlob } from 'utils/blob';
import { N_FACTOR } from 'config/data';
export interface KeystoreFile {
filename: string;
blob: string;
}
export function makeKeystoreWalletBlob(wallet: IFullWallet, password: string): string {
const keystore = wallet.toV3(password, { n: N_FACTOR });
return makeBlob('text/json;charset=UTF-8', keystore);
}
export function checkKeystoreWallet(
wallet: IFullWallet,
privateKey: string,
password: string
): boolean {
const keystore = wallet.toV3(password, { n: N_FACTOR });
const backToWallet = fromV3(keystore, password, true);
return stripHexPrefix(backToWallet.getPrivateKeyString()) === stripHexPrefix(privateKey);
}
export async function generateKeystoreFileInfo(
privateKey: string,
password: string
): Promise<KeystoreFile | null> {
if (!isValidPrivKey(privateKey)) {
throw new Error('Invalid private key supplied');
}
// Make the wallet from their private key
const keyBuffer = Buffer.from(stripHexPrefix(privateKey), 'hex');
const wallet = fromPrivateKey(keyBuffer);
// Validate the password and keystore generation
if (!checkKeystoreWallet(wallet, privateKey, password)) {
throw new Error('Keystore file generation failed, keystore wallet didnt match private key');
}
return {
filename: wallet.getV3Filename(),
blob: makeKeystoreWalletBlob(wallet, password)
};
}