git.iko.soy/bridge
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bridge/src/lib/ledger.js
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1import Transport from '@ledgerhq/hw-transport-u2f';
2import Eth from '@ledgerhq/hw-app-eth';
3import BN from 'bn.js';
5export const LEDGER_LEGACY_PATH = "m/44'/60'/0'/x";
6export const LEDGER_LIVE_PATH = "m/44'/60'/x'/0/0";
8export const chopHdPrefix = str =>
9 str.slice(0, 2) === 'm/' ? str.slice(2) : str;
10export const addHdPrefix = str => (str.slice(0, 2) === 'm/' ? str : 'm/' + str);
12export const ledgerSignTransaction = async (txn, hdPath) => {
13 const transport = await Transport.create();
14 const eth = new Eth(transport);
16 const path = chopHdPrefix(hdPath);
17 const serializedTx = txn.serialize().toString('hex');
18 const sig = await eth.signTransaction(path, serializedTx);
20 txn.v = new BN(sig.v, 'hex');
21 txn.r = new BN(sig.r, 'hex');
22 txn.s = new BN(sig.s, 'hex');
24 return txn;
25};
27export const ledgerSignMessage = async (message, hdPath) => {
28 const transport = await Transport.create();
29 const eth = new Eth(transport);
31 const path = chopHdPrefix(hdPath);
32 const { r, s, v } = await eth.signPersonalMessage(
33 path,
34 Buffer.from(message).toString('hex')
35 );
36 const ethSignature = new Uint8Array(65);
37 ethSignature.set(Buffer.from(r, 'hex'));
38 ethSignature.set(Buffer.from(s, 'hex'), 32);
39 ethSignature[64] = v;
41 return `0x${Buffer.from(ethSignature).toString('hex')}`;
42};