git.iko.soy/bridge
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bridge/src/lib/wallet.js
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1import * as bip32 from 'bip32';
2import * as bip39 from 'bip39';
3import keccak from 'keccak';
4import { reduce } from 'lodash';
5import { Just, Nothing } from 'folktale/maybe';
6import * as secp256k1 from 'secp256k1';
7import * as kg from 'urbit-key-generation/dist';
8import { isAddress } from 'web3-utils';
10export const DEFAULT_HD_PATH = "m/44'/60'/0'/0/0";
11export const ETH_ZERO_ADDR = '0x0000000000000000000000000000000000000000';
12export const ETH_ZERO_ADDR_SHORT = '0x0';
14export const WALLET_TYPES = {
15 MNEMONIC: Symbol('MNEMONIC'),
16 TICKET: Symbol('TICKET'),
17 SHARDS: Symbol('SHARDS'),
18 LEDGER: Symbol('LEDGER'),
19 TREZOR: Symbol('TREZOR'),
20 PRIVATE_KEY: Symbol('PRIVATE_KEY'),
21 KEYSTORE: Symbol('KEYSTORE'),
22};
24export function EthereumWallet(privateKey) {
25 this.privateKey = privateKey;
26 this.publicKey = secp256k1.publicKeyCreate(this.privateKey);
27 const pub = this.publicKey.toString('hex');
28 this.address = addressFromSecp256k1Public(pub);
31export const addressFromSecp256k1Public = pub => {
32 const compressed = false;
33 const uncompressed = secp256k1.publicKeyConvert(
34 Buffer.from(pub, 'hex'),
35 compressed
36 );
37 const chopped = uncompressed.slice(1); // chop parity byte
38 const hashed = keccak256(chopped);
39 const addr = addHexPrefix(hashed.slice(-20).toString('hex'));
40 return toChecksumAddress(addr);
41};
43// TODO: move all of these generic crypto helpers to another file
44export const addHexPrefix = hex =>
45 hex.slice(0, 2) === '0x' ? hex : '0x' + hex;
47export const stripHexPrefix = hex =>
48 hex.slice(0, 2) === '0x' ? hex.slice(2) : hex;
50export const keccak256 = str =>
51 keccak('keccak256')
52 .update(str)
53 .digest();
55export const isValidAddress = a => '0x0' === a || isAddress(a);
57export const isZeroAddress = a => ETH_ZERO_ADDR === a;
59export const toChecksumAddress = address => {
60 const addr = stripHexPrefix(address).toLowerCase();
61 const hash = keccak256(addr).toString('hex');
63 return reduce(
64 addr,
65 (acc, char, idx) =>
66 parseInt(hash[idx], 16) >= 8 ? acc + char.toUpperCase() : acc + char,
67 '0x'
68 );
69};
71export const eqAddr = (addr0, addr1) =>
72 toChecksumAddress(addr0) === toChecksumAddress(addr1);
74export const urbitWalletFromTicket = async (ticket, point, passphrase) => {
75 return await kg.generateWallet({
76 ticket: ticket,
77 ship: point,
78 passphrase: passphrase,
79 });
80};
82export const walletFromMnemonic = (mnemonic, hdpath, passphrase) => {
83 const seed = bip39.validateMnemonic(mnemonic)
84 ? Just(bip39.mnemonicToSeed(mnemonic, passphrase))
85 : Nothing();
87 const toWallet = (sd, path) => {
88 let wal;
89 try {
90 const hd = bip32.fromSeed(sd);
91 wal = hd.derivePath(path);
92 wal.address = addressFromSecp256k1Public(wal.publicKey);
93 wal = Just(wal);
94 } catch (_) {
95 wal = Nothing();
96 }
97 return wal;
98 };
100 const wallet = seed.chain(sd => toWallet(sd, hdpath));
101 return wallet;
102};