TON Ledger Library

This library allows you to connect to a ledger device and with with TON from browser (only Chrome), NodeJS and React Native.

How to install

To add library to your project execute:

yarn add ton-ledger

Connecting to a Device

First you need to select transport library for you environment.

Browser:

• @ledgerhq/hw-transport-webhid
• @ledgerhq/hw-transport-webusb

Node:

• @ledgerhq/hw-transport-node-ble
• @ledgerhq/hw-transport-node-hid
• @ledgerhq/hw-transport-node-hid-noevents
• @ledgerhq/hw-transport-node-hid-singleton

React Native:

• @ledgerhq/hw-transport-web-ble

After connecting to a device create a TonTransport instance:

import { TonTransport } from 'ton-ledger';
let transport = new TonTransport(device);

Deriviation Path

For hardware wallets you need to specify deriviation path of your account for TON it is specified as:

function pathForAccount(testnet: boolean, workchain: number, account: number) {
    let network = testnet ? 1 : 0;
    let chain = workchain === -1 ? 255 : 0;
    return [44, 607, network, chain, account, 0]; // Last zero is reserved for alternative wallet contracts
}

You can specify any path that starts with [44, 607], but it could be incompatible with other apps.

Get an Address and Public Key

To get an address without confimration on device you can perform next things:

let testnet = true;
let workchain = 0;
let accountIndex = 0;
let bounceable = false;
let path = pathForAccount(testnet, workchain, accountIndex);
let response = await transport.getAddress(path, { chain, bounceable, testOnly: testnet });
let publiKey: Buffer = response.publicKey;
let address: string = response.address;

Validate Address

The same as getting address, but returns address and key only when user confirms that address on the screen is correct. This method usually used after the non-confirming one and displaying address in dApp ad then requesting address validation.

let testnet = true;
let workchain = 0;
let accountIndex = 0;
let bounceable = false;
let path = pathForAccount(testnet, workchain, accountIndex);
let response = await transport.validateAddress(path, { chain, bounceable, testOnly: testnet });
let publiKey: Buffer = response.publicKey;
let address: string = response.address;

Sign simple transaction

Ledger Nanoapp works with Wallet v4 for now, we recommend you to continue to use it:

import { WalletV4Contract, WalletV4Source } from 'ton';
import { TonPayloadFormat } from 'ton-ledger';
import { TonClient, Address, SendMode, toNano } from 'ton-core';

let client = new TonClient({ endpoint: 'https://toncenter.com/api/v2/jsonRPC' });
let source = WalletV4Source.create({ workchain: 0, publicKey: deviceAddress.publicKey });
let contract = new WalletV4Contract(address, source);
let seqno = await contract.getSeqNo();

// Parameters
let path: number[]; // Account path from above
let to: Address = Address.parse('...'); // Destination
let amount: bigint = toNano('100'); // Send 100 TON
let sendMode = SendMode.IGNORE_ERRORS | SendMode.PAY_GAS_SEPARATLY;
let timeout = Math.floor((Date.now() / 1000) + 60);
let bounce = false;
let payload: TonPayloadFormat | null = null; // See below

// Signing on device
let signed = await transport.signTransaction(path, {
    to,
    sendMode,
    amount,
    seqno,
    timeout: Math.floor((Date.now() / 1000) + 60),
    bounce,
    payload: payload ? payload : undefined
});

// Send transaction to the network
await c.sendExternalMessage(contract, signed);

Payload formats

Usually you want to perform transactions with some payload. Ledger's NanoApp currently supports 2 stable commands, all other are outdated or unstable:

Transaction with a comment

Comments are limited to ASCII-only symbols and 127 letters. Anything above would be automatically downgraded to Blind Signing Mode that you want to avoid at all cost.

let payload: TonPayloadFormat = {
    type: 'comment',
    text: 'Deposit'
};

Unsafe with custom payload

This payload allows you to send arbitrary message, this is considered as Blind Signing Mode and only hash of your transaction would be shown to a user.

let cell: Cell = ...
let message = new CellMessage(cell);
let payload: TonPayloadFormat = {
    type: 'unsafe',
    message
};

License

MIT