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* @file wallet
* @author atom-yang
*/
import elliptic from 'elliptic';
import * as bip39 from 'bip39';
import hdkey from 'hdkey';
import AES from 'crypto-js/aes';
import encUTF8 from 'crypto-js/enc-utf8';
import BN from 'bn.js';
import sha256 from '../util/sha256';
import * as keyStore from '../util/keyStore';
import { encodeAddressRep, padLeft } from '../util/utils';
import { Transaction } from '../util/proto';
// eslint-disable-next-line new-cap
const ellipticEc = new elliptic.ec('secp256k1');
/**
* Advanced Encryption Standard need crypto-js
*
* @alias module:AElf/wallet
* @param {string} input anything you want to encrypt
* @param {string} password password
* @return {string} using base64 encoding way
*
* @Example
* const AESEncryptPrivateKey = aelf.wallet.AESEncrypt('123', '123');
* // AESEncryptPrivateKey = "U2FsdGVkX1+RYovrVJVEEl8eiIUA3vx4GrNR+3sqOow="
* const AESEncryptMnemonic = alef.wallet.AESEncrypt('hello world', '123');
* // AESEncryptMnemonic = U2FsdGVkX19gCjHzYmoY5FGZA1ArXG+eGZIR77dK2GE=
*
*/
const AESEncrypt = (input, password) => AES.encrypt(input, password).toString();
/**
* Decrypt any encrypted information you want to decrypt
*
* @alias module:AElf/wallet
* @param {string} input anything you want to decrypt
* @param {string} password password
* @return {string} decrypted input, using utf8 decoding way
*
* @Example
* const AESDecryptPrivateKey = aelf.wallet.AESDecrypt('U2FsdGVkX18+tvF7t4rhGOi5cbUvdTH2U5a6Tbu4Ojg=', '123');
* // AESDecryptPrivateKey = "123"
* const AESDecryptMnemonic = aelf.wallet.AESDecrypt('U2FsdGVkX19gCjHzYmoY5FGZA1ArXG+eGZIR77dK2GE=', '123');
* // AESDecryptMnemonic = "hello world"
*/
const AESDecrypt = (input, password) => AES.decrypt(input, password).toString(encUTF8);
/**
* the same as in C#
*
* @alias module:AElf/wallet
* @param {Object} pubKey get the pubKey you want through keyPair
* @return {string} address encoded address
*
* @Example
* const pubKey = wallet.keyPair.getPublic();
* const address = aelf.wallet.getAddressFromPubKey(pubKey);
*/
const getAddressFromPubKey = pubKey => {
const pubKeyEncoded = pubKey.encode();
const onceSHAResult = Buffer.from(sha256(pubKeyEncoded), 'hex');
const hash = sha256(onceSHAResult).slice(0, 64);
return encodeAddressRep(hash);
};
const _getWallet = (type, value, BIP44Path = "m/44'/1616'/0'/0/0", seedWithBuffer = true) => {
// m/purpose'/coin_type'/account'/change/address_index
// "m/44'/1616'/0'/0/0"
let mnemonic = '';
let rootSeed = '';
let childWallet = '';
let keyPair = '';
let hdWallet;
switch (type) {
case 'createNewWallet':
mnemonic = bip39.generateMnemonic();
rootSeed = bip39.mnemonicToSeedSync(mnemonic).toString('hex');
hdWallet = hdkey.fromMasterSeed(seedWithBuffer ? Buffer.from(rootSeed, 'hex') : rootSeed);
childWallet = hdWallet.derive(BIP44Path);
keyPair = ellipticEc.keyFromPrivate(childWallet.privateKey);
break;
case 'getWalletByMnemonic':
mnemonic = value;
rootSeed = bip39.mnemonicToSeedSync(mnemonic).toString('hex');
hdWallet = hdkey.fromMasterSeed(seedWithBuffer ? Buffer.from(rootSeed, 'hex') : rootSeed);
childWallet = hdWallet.derive(BIP44Path);
keyPair = ellipticEc.keyFromPrivate(childWallet.privateKey);
break;
case 'getWalletByPrivateKey':
if (typeof value === 'string') {
keyPair = ellipticEc.keyFromPrivate(padLeft(value, 64, '0'));
} else {
keyPair = ellipticEc.keyFromPrivate(value);
}
break;
default:
throw new Error('not a valid method');
}
// let mnemonic = bip39.generateMnemonic();
// let rootSeed = bip39.mnemonicToSeedHex(mnemonic);
// let hdWallet = hdkey.fromMasterSeed(Buffer.from(rootSeed, 'hex'));
// let keyPair = ec.keyFromPrivate(xPrivateKey);
// TODO 1.将私钥加密保存,用密码解密才能使用。
// TODO 2.将助记词机密保存,用密码解密才能获取。
const privateKey = keyPair.getPrivate().toString(16, 64);
const publicKey = keyPair.getPublic();
const address = getAddressFromPubKey(publicKey);
return {
mnemonic,
BIP44Path,
childWallet,
keyPair,
privateKey,
address
};
};
/**
* get signature
* @param bytesToBeSign
* @param keyPair
* @returns {Buffer}
*/
const getSignature = (bytesToBeSign, keyPair) => {
const privateKey = keyPair.getPrivate('hex');
const msgHash = sha256(bytesToBeSign);
const sigObj = ellipticEc.sign(Buffer.from(msgHash, 'hex'), privateKey, 'hex', {
canonical: true
});
const hex = [sigObj.r.toString('hex', 32), sigObj.s.toString('hex', 32), `0${sigObj.recoveryParam.toString()}`].join(
''
);
return Buffer.from(hex, 'hex');
};
/**
* create a wallet
*
* @alias module:AElf/wallet
* @param {string} BIP44Path
* @return {Object} wallet
*
* @Example
* const wallet = aelf.wallet.createNewWallet();
* // The format returned is similar to this
* // wallet = {
* // mnemonic: "hello world",
* // BIP44Path: 'm/44\'/1616\'/0\'/0/0',
* // childWallet: {},
* // keyPair: KeyPair {ec: EC, priv: BN, pub: Point}
* // privateKey: "123f7c123"
* // address: "5uhk3434242424"
* // }
*/
const createNewWallet = (BIP44Path = "m/44'/1616'/0'/0/0", seedWithBuffer = true) =>
_getWallet('createNewWallet', '', BIP44Path, seedWithBuffer);
/**
* create a wallet by mnemonic
*
* @alias module:AElf/wallet
* @param {string} mnemonic base on bip39
* @param {string} BIP44Path
* @return {Object} wallet
*
* @Example
*
* const mnemonicWallet = aelf.wallet.getWalletByMnemonic('hello world');
*/
const getWalletByMnemonic = (mnemonic, BIP44Path = "m/44'/1616'/0'/0/0", seedWithBuffer = true) => {
if (bip39.validateMnemonic(mnemonic)) {
return _getWallet('getWalletByMnemonic', mnemonic, BIP44Path, seedWithBuffer);
}
return false;
};
/**
* create a wallet by private key
*
* @alias module:AElf/wallet
* @param {string} privateKey privateKey
* @return {Object} wallet
*
* @Example
* const privateKeyWallet = aelf.wallet.getWalletByPrivateKey('123');
*
*/
const getWalletByPrivateKey = privateKey => _getWallet('getWalletByPrivateKey', privateKey);
/**
* sign a transaction
*
* @alias module:AElf/wallet
* @param {Object} rawTxn rawTxn
* @param {Object} keyPair Any standard key pair
* @return {Object} wallet
*
* @Example
* const rawTxn = proto.getTransaction(
* 'ELF_65dDNxzcd35jESiidFXN5JV8Z7pCwaFnepuYQToNefSgqk9',
* 'ELF_65dDNxzcd35jESiidFXN5JV8Z7pCwaFnepuYQToNefSgqk9',
* 'test',
* []
* );
* const signWallet = aelf.wallet.signTransaction(rawTxn, wallet.keyPair);
*/
const signTransaction = (rawTxn, keyPair) => {
let { params } = rawTxn;
if (params.length === 0) {
params = null;
}
// proto in proto.Transaction use proto2, but C# use proto3
// proto3 will remove the default value key.
// The differences between proto2 and proto3:
// https://blog.csdn.net/huanggang982/article/details/77944174
const ser = Transaction.encode(rawTxn).finish();
const sig = getSignature(ser, keyPair);
return {
...rawTxn,
params,
signature: sig
};
};
/**
* Encryption Using Elliptic Curve Algorithms（Use ECDSA)
* Please see https://www.npmjs.com/package/elliptic#incentive
*
* @alias module:AElf/wallet
* @param {string} hexString hex string
* @param {Object} keyPair Any standard key pair
* @return {Buffer} Buffer.from(hex, 'hex')
*
* @Example
* const buffer = aelf.wallet.sign('68656c6c6f20776f726c64', wallet.keyPair);
* buffer = [65, 246, 49, 108, 122, 252, 66, 187, 240, 7, 14, 48, 89,
* 38, 103, 42, 58, 0, 46, 182, 180, 194, 200, 208, 141, 15, 95, 67,
* 234, 248, 31, 199, 73, 151, 2, 133, 233, 84, 180, 216, 116, 9, 153,
* 208, 254, 175, 96, 123, 76, 184, 224, 87, 69, 220, 172, 170, 239, 232,
* 188, 123, 168, 163, 244, 151, 1]
*/
const sign = (hexString, keyPair) => {
const bytesToBeSign = Buffer.from(hexString.replace('0x', ''), 'hex');
return getSignature(bytesToBeSign, keyPair);
};
const hexToDecimal = x => ellipticEc.keyFromPrivate(x, 'hex').getPrivate().toString(10);
/**
* @param {string} signature Signature
* @param {string} msgHash Message for signing
* @param {string} pubKey deprecatedParam - This parameter is deprecated.
*/
const verify = (signature, msgHash, pubKey) => {
const rHex = signature.substring(0, 64);
const sHex = signature.substring(64, 128);
const recoveryParamHex = signature.substring(128, 130);
const sigObj = {
r: new BN(rHex, 16),
s: new BN(sHex, 16),
recoveryParam: recoveryParamHex.slice(1)
};
let publicKey;
if (!pubKey) {
const key = ellipticEc.recoverPubKey(hexToDecimal(msgHash), sigObj, +sigObj.recoveryParam, 'hex');
publicKey = ellipticEc.keyFromPublic(key).getPublic('hex');
} else {
publicKey = pubKey;
}
return ellipticEc.verify(msgHash, sigObj, Buffer.from(publicKey, 'hex'));
};
export default {
hdkey,
bip39,
sign,
verify,
signTransaction,
createNewWallet,
getWalletByMnemonic,
getWalletByPrivateKey,
getAddressFromPubKey,
ellipticEc,
AESEncrypt,
AESDecrypt,
keyStore
};
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