Bancoin sign data by ledger in browser

Install

$ npm install --save @bancoin/ledger

Usage

Create connection

const BancoinLedger = require('@Bancoin/ledger');
const ledger = new BancoinLedger();

BancoinLedger can have optional arguments.

    import TransportNodeHid from '@ledgerhq/hw-transport-node-u2f';

    const options = {
        debug: true, //boolean,
        openTimeout: 3000, //number,
        listenTimeout: 30000, //number,
        exchangeTimeout: 30000, //number,
        networkCode: 87, //number,
        transport: TransportNodeHid
    };

    const ledger = new BancoinLedger(options);

Where:

debug enable or not logs of the binary exchange. openTimeout is a delay number in ms for waiting connection.
listenTimeout is a delay number in ms for waiting listen request to U2F device.
exchangeTimeout is a timeout (in milliseconds) for the exchange call. Only some transport might implement it. (e.g. U2F).
networkCode is Bancoin network code (87 - for mainet)
transport is U2F Transport implementation. (hw-transport-u2f by default)

• @ledgerhq/hw-transport-u2f
• @ledgerhq/hw-transport-webusb
• @ledgerhq/hw-transport-web-ble
• @ledgerhq/hw-transport-http

Read about transport

BancoinLedger API

• probeDevice

  probeDevice(): Promise. If device available and ready, Promise returned true.

    const canIUse = async () => {
        return await ledger.probeDevice();
    }

• tryConnect

  tryConnect(): Promise<>. reconnect to Transport and init ledger libs.

    const isLedgerReady = async () => {
        try {
            return await ledger.tryConnect();
        } catch (e) {
            ///...error handlers
        }
    };
  

• getUserDataById

  getUserDataById(id): Promise. Get user from ledger, where user is: { id: number, path: string, BancoinAddress: string, publicKey: string }

  id - is number from 0
  path - is string in internal ledger format
  bancoinAddress - is string in base58 format
  publicKey - is string in base58 format

  ledger.getUserDataById(id)
      .then(
          (user) => {...},
          (err) => {...}
      );

• signTransaction

  Sign bancoin transaction bytes (ledger show detailed transaction info)

      ledger.signTransaction(userId, asset, data)

  userId - number data - Array number form 0 to 255 asset - {precision: number, ...}

  Result is Promise with signature string in base58 format

• signSomeData

  Sign any bytes (ledger can't show detail info)

    ledger.signSomeData(userId, data)

  userId - number data - Array number form 0 to 255

  Result is Promise with signature string in base58 format

• signRequest

  Sign any bytes (ledger can't show detail info)

    ledger.signRequest(userId, data)

  userId - number data - Array number form 0 to 255

  Result is Promise with signature string in base58 format

• signMessage

  Sign any string (ledger can't show detail info)

  ledger.signMessage(userId, data)

  userId - number data - string

  Result is Promise with signature string in base58 format