feat(xmr): keystone<>cake wallet integration

cw_core/lib/wallet_base.dart

@@ -62,6 +62,8 @@ abstract class WalletBase<BalanceType extends Balance, HistoryType extends Trans
 
   bool get isHardwareWallet => walletInfo.isHardwareWallet;
 
+  bool get isLedger => walletInfo.isLedger;
+
   bool get hasRescan => false;
 
   Future<void> connectToNode({required Node node});

cw_core/lib/wallet_info.dart

@@ -25,6 +25,8 @@ enum DerivationType {
 enum HardwareWalletType {
   @HiveField(0)
   ledger,
+  @HiveField(1)
+  keystone,
 }
 
 @HiveType(typeId: DerivationInfo.typeId)
@@ -226,6 +228,12 @@ class WalletInfo extends HiveObject {
 
   bool get isHardwareWallet => hardwareWalletType != null;
 
+  bool get isConnectableHardwareWallet => isLedger;
+
+  bool get isLedger => hardwareWalletType == HardwareWalletType.ledger;
+
+  bool get isKeystone => hardwareWalletType == HardwareWalletType.keystone;
+
   DateTime get date => DateTime.fromMillisecondsSinceEpoch(timestamp);
 
   Stream<String> get yatLastUsedAddressStream => _yatLastUsedAddressController.stream;

cw_monero/lib/monero_wallet_service.dart

@@ -79,8 +79,9 @@ class MoneroRestoreWalletFromKeysCredentials extends WalletCredentials {
       required this.address,
       required this.viewKey,
       required this.spendKey,
-      int height = 0})
-      : super(name: name, password: password, height: height);
+      int height = 0,
+      HardwareWalletType? hardwareWalletType})
+      : super(name: name, password: password, height: height, hardwareWalletType: hardwareWalletType);
 
   final String language;
   final String address;
@@ -189,7 +190,7 @@ class MoneroWalletService extends WalletService<
           unspentCoinsInfo: unspentCoinsInfoSource,
           password: password);
 
-      if (wallet.isHardwareWallet) {
+      if (wallet.isLedger) {
         wallet.setLedgerConnection(gLedger!);
         gLedger = null;
       }
@@ -548,7 +549,7 @@ class MoneroWalletService extends WalletService<
     return walletInfoSource.values
             .firstWhereOrNull(
                 (info) => info.id == WalletBase.idFor(name, getType()))
-            ?.isHardwareWallet ??
+            ?.isConnectableHardwareWallet ??
         false;
   }
 }

lib/buy/dfx/dfx_buy_provider.dart

@@ -335,7 +335,7 @@ class DFXBuyProvider extends BuyProvider {
       required bool isBuyAction,
       required String cryptoCurrencyAddress,
       String? countryCode}) async {
-    if (wallet.isHardwareWallet) {
+    if (wallet.isLedger) {
       if (!ledgerVM!.isConnected) {
         await Navigator.of(context).pushNamed(Routes.connectDevices,
             arguments: ConnectDevicePageParams(

lib/buy/robinhood/robinhood_buy_provider.dart

@@ -157,7 +157,7 @@ class RobinhoodBuyProvider extends BuyProvider {
       required bool isBuyAction,
       required String cryptoCurrencyAddress,
       String? countryCode}) async {
-    if (wallet.isHardwareWallet) {
+    if (wallet.isLedger) {
       if (!ledgerVM!.isConnected) {
         await Navigator.of(context).pushNamed(Routes.connectDevices,
             arguments: ConnectDevicePageParams(

lib/di.dart

@@ -66,6 +66,7 @@ import 'package:cake_wallet/src/screens/buy/payment_method_options_page.dart';
 import 'package:cake_wallet/src/screens/exchange_trade/exchange_trade_external_send_page.dart';
 import 'package:cake_wallet/src/screens/payjoin_details/payjoin_details_page.dart';
 import 'package:cake_wallet/src/screens/receive/address_list_page.dart';
+import 'package:cake_wallet/src/screens/restore/restore_from_keystone_private_mode_page.dart';
 import 'package:cake_wallet/src/screens/seed/seed_verification/seed_verification_page.dart';
 import 'package:cake_wallet/src/screens/send/transaction_success_info_page.dart';
 import 'package:cake_wallet/src/screens/wallet_list/wallet_list_page.dart';
@@ -816,7 +817,7 @@ Future<void> setup({
       getIt.get<BalanceViewModel>(),
       getIt.get<ContactListViewModel>(),
       _transactionDescriptionBox,
-      getIt.get<AppStore>().wallet!.isHardwareWallet ? getIt.get<LedgerViewModel>() : null,
+      getIt.get<AppStore>().wallet!.isLedger ? getIt.get<LedgerViewModel>() : null,
       coinTypeToSpendFrom: coinTypeToSpendFrom ?? UnspentCoinType.nonMweb,
       getIt.get<UnspentCoinsListViewModel>(param1: coinTypeToSpendFrom),
       getIt.get<FeesViewModel>(),
@@ -1079,12 +1080,12 @@ Future<void> setup({
   getIt.registerFactory<RobinhoodBuyProvider>(() => RobinhoodBuyProvider(
       wallet: getIt.get<AppStore>().wallet!,
       ledgerVM:
-          getIt.get<AppStore>().wallet!.isHardwareWallet ? getIt.get<LedgerViewModel>() : null));
+          getIt.get<AppStore>().wallet!.isLedger ? getIt.get<LedgerViewModel>() : null));
 
   getIt.registerFactory<DFXBuyProvider>(() => DFXBuyProvider(
       wallet: getIt.get<AppStore>().wallet!,
       ledgerVM:
-          getIt.get<AppStore>().wallet!.isHardwareWallet ? getIt.get<LedgerViewModel>() : null));
+          getIt.get<AppStore>().wallet!.isLedger ? getIt.get<LedgerViewModel>() : null));
 
   getIt.registerFactory<MoonPayProvider>(() => MoonPayProvider(
         appStore: getIt.get<AppStore>(),
@@ -1334,6 +1335,9 @@ Future<void> setup({
 
   getIt.registerFactory(() => RestoreFromBackupPage(getIt.get<RestoreFromBackupViewModel>()));
 
+  getIt.registerFactoryParam<RestoreFromKeystonePrivateModePage, String, void>(
+      (String code, _) => RestoreFromKeystonePrivateModePage(code));
+
   getIt.registerFactoryParam<TradeDetailsPage, Trade, void>(
       (Trade trade, _) => TradeDetailsPage(getIt.get<TradeDetailsViewModel>(param1: trade)));
 

lib/monero/cw_monero.dart

@@ -215,15 +215,17 @@ class CWMonero extends Monero {
           required String address,
           required String password,
           required String language,
-          required int height}) =>
+          required int height,
+          HardwareWalletType? hardwareWalletType}) =>
       MoneroRestoreWalletFromKeysCredentials(
           name: name,
           spendKey: spendKey,
           viewKey: viewKey,
           address: address,
           password: password,
           language: language,
-          height: height);
+          height: height,
+          hardwareWalletType: hardwareWalletType);
 
   @override
   WalletCredentials createMoneroRestoreWalletFromHardwareCredentials({

lib/router.dart

@@ -73,6 +73,7 @@ import 'package:cake_wallet/src/screens/receive/fullscreen_qr_page.dart';
 import 'package:cake_wallet/src/screens/receive/receive_page.dart';
 import 'package:cake_wallet/src/screens/rescan/rescan_page.dart';
 import 'package:cake_wallet/src/screens/restore/restore_from_backup_page.dart';
+import 'package:cake_wallet/src/screens/restore/restore_from_keystone_private_mode_page.dart';
 import 'package:cake_wallet/src/screens/restore/restore_options_page.dart';
 import 'package:cake_wallet/src/screens/restore/sweeping_wallet_page.dart';
 import 'package:cake_wallet/src/screens/restore/wallet_restore_choose_derivation.dart';
@@ -673,6 +674,11 @@ Route<dynamic> createRoute(RouteSettings settings) {
       return CupertinoPageRoute<void>(
           fullscreenDialog: true, builder: (_) => getIt.get<RestoreFromBackupPage>());
 
+    case Routes.restoreFromKeystonePrivateMode:
+      final args = settings.arguments as String;
+      return CupertinoPageRoute<void>(
+          fullscreenDialog: true, builder: (_) => getIt.get<RestoreFromKeystonePrivateModePage>(param1: args));
+
     case Routes.support:
       return handleRouteWithPlatformAwareness(
         (context) => getIt.get<SupportPage>(),

lib/routes.dart

@@ -59,6 +59,7 @@ class Routes {
   static const backup = '/backup';
   static const editBackupPassword = '/edit_backup_passowrd';
   static const restoreFromBackup = '/restore_from_backup';
+  static const restoreFromKeystonePrivateMode = '/restore_from_keystone_private_mode';
   static const support = '/support';
   static const supportLiveChat = '/support/live_chat';
   static const supportOtherLinks = '/support/other';

lib/src/screens/pin_code/pin_code_widget.dart

@@ -13,11 +13,13 @@ class PinCodeWidget extends StatefulWidget {
     required this.onChangedPin,
     required this.hasLengthSwitcher,
     this.onChangedPinLength,
+    this.title,
   }) : super(key: key);
 
   final void Function(String pin, PinCodeState state) onFullPin;
   final void Function(String pin) onChangedPin;
   final void Function(int length)? onChangedPinLength;
+  final String? title;
   final bool hasLengthSwitcher;
   final int initialPinLength;
 
@@ -51,7 +53,7 @@ class PinCodeState<T extends PinCodeWidget> extends State<T> {
     super.initState();
     pinLength = widget.initialPinLength;
     pin = '';
-    title = S.current.enter_your_pin;
+    title = widget.title ?? S.current.enter_your_pin;
     _aspectRatio = 0;
     _focusNode = FocusNode();
     WidgetsBinding.instance.addPostFrameCallback((_) {

lib/src/screens/restore/restore_from_keystone_private_mode_page.dart

@@ -0,0 +1,83 @@
+import 'dart:convert';
+import 'dart:typed_data';
+
+import 'package:cake_wallet/generated/i18n.dart';
+import 'package:cake_wallet/src/screens/base_page.dart';
+import 'package:cake_wallet/src/screens/pin_code/pin_code_widget.dart';
+import 'package:cake_wallet/utils/show_bar.dart';
+import 'package:eth_sig_util/util/keccak.dart';
+import 'package:flutter/material.dart';
+import 'package:hex/hex.dart' as Hex;
+import 'package:cryptography/cryptography.dart';
+
+class RestoreFromKeystonePrivateModePage extends BasePage {
+  @override
+  String get title => '';
+
+  RestoreFromKeystonePrivateModePage(this.code)
+      : pinCodeStateKey = GlobalKey<PinCodeState>();
+
+  final GlobalKey<PinCodeState> pinCodeStateKey;
+  final String code;
+  static const sixPinLength = 6;
+
+  Future<SecretKey> _deriveKeyFromPin(Uint8List pin) async {
+    final hash = keccak256(pin);
+    return SecretKey(hash.buffer.asUint8List());
+  }
+
+  Future<String> _decryptData(Uint8List cipherText, SecretKey secretKey) async {
+    final algorithm = Chacha20(macAlgorithm: MacAlgorithm.empty);
+    final secretBox = SecretBox(
+      cipherText,
+      nonce: Uint8List(12),
+      mac: Mac.empty,
+    );
+    final text = await algorithm.decrypt(
+      secretBox,
+      secretKey: secretKey,
+    );
+
+    return utf8.decode(text);
+  }
+
+  @override
+  Widget body(BuildContext context) {
+    return PinCodeWidget(
+      key: pinCodeStateKey,
+      title: S.of(context).restore_from_private_mode_title,
+      onFullPin: (pin, state) async {
+        try {
+          Uint8List pinDigits = Uint8List.fromList(
+              pin.split('').map((char) => int.parse(char)).toList());
+          final secretKey = await _deriveKeyFromPin(pinDigits);
+
+          final restoreJson = json.decode(code);
+
+          restoreJson['primaryAddress'] = await _decryptData(
+              Uint8List.fromList(
+                  Hex.HEX.decode(restoreJson['primaryAddress'] as String)),
+              secretKey);
+
+          restoreJson['privateViewKey'] = await _decryptData(
+              Uint8List.fromList(
+                  Hex.HEX.decode(restoreJson['privateViewKey'] as String)),
+              secretKey);
+
+          final res = json.encode(restoreJson);
+          Navigator.of(context).pop(res);
+        } catch (_) {
+          pinCodeStateKey.currentState?.reset();
+          showBar<void>(
+              context,
+              S
+                  .of(context)
+                  .error_text_failed_to_resotre_from_keystone_private_mode);
+        }
+      },
+      initialPinLength: sixPinLength,
+      onChangedPin: (String pin) {},
+      hasLengthSwitcher: false,
+    );
+  }
+}

lib/src/screens/restore/restore_options_page.dart

@@ -140,6 +140,15 @@ class _RestoreOptionsBodyState extends State<_RestoreOptionsBody> {
                     ),
                   ),
                 if (DeviceInfo.instance.isMobile)
+                  Padding(
+                    padding: EdgeInsets.only(top: 24),
+                    child: OptionTile(
+                        key: ValueKey('restore_options_from_keystone_button_key'),
+                        onPressed: () => _onScanQRCode(context),
+                        image: imageRestoreQR,
+                        title: S.of(context).restore_title_from_keystone,
+                        description: S.of(context).restore_description_from_keystone),
+                  ),
                   Padding(
                     padding: EdgeInsets.only(top: 24),
                     child: OptionTile(

lib/src/screens/send/send_page.dart

@@ -435,7 +435,7 @@ class SendPage extends BasePage {
                                 return;
                               }
 
-                              if (sendViewModel.wallet.isHardwareWallet) {
+                              if (sendViewModel.wallet.isLedger) {
                                 if (!sendViewModel.ledgerViewModel!.isConnected) {
                                   await Navigator.of(context).pushNamed(Routes.connectDevices,
                                       arguments: ConnectDevicePageParams(

lib/src/screens/ur/animated_ur_page.dart

@@ -12,6 +12,7 @@ import 'package:cake_wallet/src/widgets/primary_button.dart';
 import 'package:cake_wallet/utils/show_pop_up.dart';
 import 'package:cake_wallet/view_model/animated_ur_model.dart';
 import 'package:cw_core/wallet_type.dart';
+import 'package:cw_core/wallet_info.dart';
 import 'package:flutter/material.dart';
 
 class AnimatedURPage extends BasePage {
@@ -51,11 +52,21 @@ class AnimatedURPage extends BasePage {
     return first.split('/')[0];
   }
 
+  bool get isKeystone =>
+      animatedURmodel.wallet.walletInfo.hardwareWalletType ==
+      HardwareWalletType.keystone;
+
   @override
   Widget body(BuildContext context) {
     return Column(
       mainAxisSize: MainAxisSize.min,
       children: [
+        if (isKeystone)
+          Padding(
+            padding: const EdgeInsets.only(top: 32.0),
+            child: Image.asset('assets/images/hardware_wallet/keystone_scan_title.png',
+                width: 160, height: 36),
+          ),
         Padding(
           padding: const EdgeInsets.all(32.0),
           child: URQR(
@@ -66,15 +77,19 @@ class AnimatedURPage extends BasePage {
         if (["ur:xmr-txunsigned", "ur:xmr-output", "ur:psbt", BBQR.header]
             .contains(urQrType)) ...{
           Spacer(),
-          Padding(
-            padding: const EdgeInsets.symmetric(horizontal: 16.0),
-            child: SizedBox(
-              width: double.maxFinite,
-              child: PrimaryButton(
-                onPressed: () => _continue(context),
-                text: "Scan QR Code",
-                color: Theme.of(context).colorScheme.primary,
-                textColor: Theme.of(context).colorScheme.onPrimary,
+          SafeArea(
+            top: false,
+            minimum: const EdgeInsets.symmetric(horizontal: 32.0),
+            child: Padding(
+              padding: const EdgeInsets.symmetric(horizontal: 16.0),
+              child: SizedBox(
+                width: double.maxFinite,
+                child: PrimaryButton(
+                  onPressed: () => _continue(context),
+                  text: "Scan QR Code",
+                  color: Theme.of(context).colorScheme.primary,
+                  textColor: Theme.of(context).colorScheme.onPrimary,
+                )
               ),
             ),
           ),

lib/view_model/restore/restore_wallet.dart

@@ -17,7 +17,8 @@ class RestoredWallet {
       this.txDescription,
       this.recipientName,
       this.height,
-      this.privateKey});
+      this.privateKey,
+      this.source});
 
   final WalletRestoreMode restoreMode;
   final WalletType type;
@@ -32,6 +33,7 @@ class RestoredWallet {
   final String? recipientName;
   final int? height;
   final String? privateKey;
+  final String? source;
 
   factory RestoredWallet.fromKey(Map<String, dynamic> json) {
     try {
@@ -40,6 +42,7 @@ class RestoredWallet {
         json['address'] = codeParsed["primaryAddress"];
         json['view_key'] = codeParsed["privateViewKey"];
         json['height'] = codeParsed["restoreHeight"].toString();
+        json['source'] = codeParsed["source"] ?? '';
       }
     } catch (e) {
       // fine, we don't care, it is only for monero anyway
@@ -54,6 +57,7 @@ class RestoredWallet {
       viewKey: json['view_key'] as String?,
       height: height != null ? int.tryParse(height) ?? 0 : 0,
       privateKey: json['private_key'] as String?,
+      source: json['source'] as String?,
     );
   }