src/lib/trezor.ts · bridge

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bridge/src/lib/trezor.ts

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1import TrezorConnect from 'trezor-connect';

2import { convertToInt } from './convertToInt';

3import BN from 'bn.js';

5const TREZOR_PATH = "m/44'/60'/0'/0/x";

7// handles 0x-prefixed hex string as well as number type

8const formatChainId = val =>

9 typeof val === 'number' ? val : convertToInt(val.slice(2), 16);

11const trezorSignTransaction = async (txn, hdpath) => {

12 const trezorFormattedTxn = {

13 to: txn.to.toString('hex'),

14 value: txn.value.toString('hex'),

15 data: txn.data.toString('hex'),

16 gasLimit: txn.gasLimit.toString('hex'),

17 gasPrice: txn.gasPrice.toString('hex'),

18 nonce: txn.nonce.length === 0 ? '00' : txn.nonce.toString('hex'),

19 chainId: formatChainId(txn.common.chainId()),

20 };

22 const sig = await TrezorConnect.ethereumSignTransaction({

23 path: hdpath,

24 transaction: trezorFormattedTxn,

25 });

27 if (!sig.success) {

28 throw new Error(sig.payload.error);

29 }

31 const payload = sig.payload;

33 txn.v = new BN(payload.v.slice(2), 'hex');

34 txn.r = new BN(payload.r.slice(2), 'hex');

35 txn.s = new BN(payload.s.slice(2), 'hex');

37 return txn;

40export const trezorSignMessage = async (message, hdPath) => {

41 const sig = await TrezorConnect.ethereumSignMessage({

42 path: hdPath,

43 message,

44 });

46 if (!sig.success) {

47 throw new Error(sig.payload.error);

48 }

50 const { signature } = sig.payload;

52 return signature;

55export { TREZOR_PATH, trezorSignTransaction };