Add Ledger interfaces (#211)

packages/ui-keyring/package.json

@@ -11,9 +11,13 @@
   "license": "Apache-2.0",
   "dependencies": {
     "@babel/runtime": "^7.6.0",
+    "@ledgerhq/hw-transport-u2f": "^4.70.0",
+    "@ledgerhq/hw-transport-webusb": "^4.70.0",
+    "@types/ledgerhq__hw-transport-u2f": "^4.21.1",
     "@types/mkdirp": "^0.5.2",
     "@types/store": "^2.0.2",
     "extensionizer": "^1.0.1",
+    "ledger-polkadot": "^0.0.3",
     "mkdirp": "^0.5.1",
     "store": "^2.0.12",
     "styled-components": "^4.3.1"

packages/ui-keyring/src/index.ts

@@ -5,11 +5,13 @@
 import { assertSingletonPackage } from '@polkadot/util';
 
 import keyring, { Keyring } from './Keyring';
+import { openLedger } from './ledger';
 
 assertSingletonPackage('@polkadot/ui-keyring');
 
 export default keyring;
 
 export {
-  Keyring
+  Keyring,
+  openLedger
 };

packages/ui-keyring/src/ledger-polkadot.d.ts

@@ -0,0 +1,36 @@
+declare module 'ledger-polkadot' {
+  import Transport from '@ledgerhq/hw-transport';
+
+  export interface ResponseBase {
+    error_message: string;
+    return_code: number;
+  }
+
+  export interface ReponseAddress extends ResponseBase {
+    address: string;
+    pubKey: string;
+  }
+
+  export interface ResponseVersion extends ResponseBase {
+    device_locked: boolean;
+    major: number;
+    minor: number;
+    patch: number;
+    test_mode: boolean;
+  }
+
+  export interface ResponseSign extends ResponseBase {
+    signature: string;
+  }
+
+  declare class LedgerApp {
+    constructor (transport: Transport, scrambleKey?: string);
+
+    getVersion (): Promise<ResponseVersion>;
+    getAddress (account: number, change: number, addressIndex: number, requireConfirmation?: boolean): Promise<ResponseAddress>;
+    signSendChunk (chunkIdx: number, chunkNum: number, chunk: Buffer): Promise<ResponseSign>;
+    sign (account: number, change: number, addressIndex: number, message: Uint8Array): Promise<ResponseSign>;
+  }
+
+  export default LedgerApp;
+}

packages/ui-keyring/src/ledger.ts

@@ -0,0 +1,22 @@
+// Copyright 2017-2019 @polkadot/ui-keyring authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import Transport from '@ledgerhq/hw-transport';
+import LedgerU2F from '@ledgerhq/hw-transport-u2f';
+import LedgerWebUSB from '@ledgerhq/hw-transport-webusb';
+import LedgerApp from 'ledger-polkadot';
+
+export async function openLedger (type: 'u2f' | 'webusb'): Promise<LedgerApp> {
+  let transport: Transport;
+
+  if (type === 'u2f') {
+    transport = await LedgerU2F.create(7500);
+  } else if (type === 'webusb') {
+    transport = await LedgerWebUSB.create();
+  } else {
+    throw new Error(`Unsupported transport ${type}`);
+  }
+
+  return new LedgerApp(transport);
+}

packages/ui-keyring/src/ledgerhq_hw-transport-webusb.d.ts

@@ -0,0 +1 @@
+declare module '@ledgerhq/hw-transport-webusb';

packages/ui-settings/src/Settings.ts

@@ -2,15 +2,21 @@
 // This software may be modified and distributed under the terms
 // of the Apache-2.0 license. See the LICENSE file for details.
 
+import EventEmitter from 'eventemitter3';
 import store from 'store';
 import { isUndefined } from '@polkadot/util';
 
 import { CRYPTOS, ENDPOINT_DEFAULT, ENDPOINTS, ICON_DEFAULT, ICONS, LANGUAGE_DEFAULT, LANGUAGES, LEDGER_CONN, LEDGER_CONN_DEFAULT, LOCKING_DEFAULT, LOCKING, PREFIX_DEFAULT, PREFIXES, UIMODE_DEFAULT, UIMODES, UITHEME_DEFAULT, UITHEMES } from './defaults';
 import { Option, SettingsStruct } from './types';
 
+type ChangeCallback = (settings: SettingsStruct) => void;
+type OnTypes = 'change';
+
 export class Settings implements SettingsStruct {
   private _apiUrl: string;
 
+  private _emitter: EventEmitter;
+
   private _i18nLang: string;
 
   private _icon: string;
@@ -28,6 +34,8 @@ export class Settings implements SettingsStruct {
   public constructor () {
     const settings = store.get('settings') || {};
 
+    this._emitter = new EventEmitter();
+
     this._apiUrl = settings.apiUrl || process.env.WS_URL || ENDPOINT_DEFAULT;
     this._ledgerConn = settings.ledgerConn || LEDGER_CONN_DEFAULT;
     this._i18nLang = settings.i18nLang || LANGUAGE_DEFAULT;
@@ -129,7 +137,14 @@ export class Settings implements SettingsStruct {
     this._uiMode = settings.uiMode || this._uiMode;
     this._uiTheme = settings.uiTheme || this._uiTheme;
 
-    store.set('settings', this.get());
+    const newValues = this.get();
+
+    store.set('settings', newValues);
+    this._emitter.emit('change', newValues);
+  }
+
+  public on (type: OnTypes, cb: ChangeCallback): void {
+    this._emitter.on(type, cb);
   }
 }