Refactor and unify the send & multisig-propose flow

mobile-app/lib/features/components/shared_address_action_sheet.dart

@@ -10,6 +10,7 @@ import 'package:resonance_network_wallet/shared/extensions/current_route_extensi
 import 'package:resonance_network_wallet/shared/extensions/media_query_data_extension.dart';
 import 'package:resonance_network_wallet/v2/components/quantus_button.dart';
 import 'package:resonance_network_wallet/v2/screens/send/input_amount_screen.dart';
+import 'package:resonance_network_wallet/v2/screens/send/regular_send_strategy.dart';
 
 class SharedAddressActionSheet extends StatefulWidget {
   final String address;
@@ -58,7 +59,12 @@ class _SharedAddressActionSheetState extends State<SharedAddressActionSheet> {
 
   void _sendToAddress() {
     Navigator.of(context).pop();
-    Navigator.push(context, MaterialPageRoute(builder: (_) => InputAmountScreen(recipientAddress: widget.address)));
+    Navigator.push(
+      context,
+      MaterialPageRoute(
+        builder: (_) => InputAmountScreen(strategy: const RegularSendStrategy(), recipientAddress: widget.address),
+      ),
+    );
   }
 
   void _closeSheet() {

mobile-app/lib/l10n/app_en.arb

@@ -2461,7 +2461,7 @@
       "description": "Empty state on refund address picker"
     },
 
-    "componentQrScannerTitle": "Scan QR Code",
+    "componentQrScannerTitle": "X QR Code",
     "@componentQrScannerTitle": {
       "description": "Text for app bar or button label on QR scanner component"
     },

mobile-app/lib/l10n/app_localizations.dart

@@ -3179,7 +3179,7 @@ abstract class AppLocalizations {
   /// Text for app bar or button label on QR scanner component
   ///
   /// In en, this message translates to:
-  /// **'Scan QR Code'**
+  /// **'X QR Code'**
   String get componentQrScannerTitle;
 
   /// Snackbar when gallery image has no QR code

mobile-app/lib/l10n/app_localizations_en.dart

@@ -1689,7 +1689,7 @@ class AppLocalizationsEn extends AppLocalizations {
   String get swapRefundPickerEmpty => 'No recent refund addresses';
 
   @override
-  String get componentQrScannerTitle => 'Scan QR Code';
+  String get componentQrScannerTitle => 'X QR Code';
 
   @override
   String get componentQrScannerNoCode => 'No QR code found in image';

mobile-app/lib/services/transaction_submission_service.dart

@@ -27,7 +27,7 @@ class TransactionSubmissionService {
 
   TransactionSubmissionService(this._ref) : _poller = PendingTransactionPollingService(_ref);
 
-  Future<void> balanceTransfer(
+  Future<String> balanceTransfer(
     Account account,
     String targetAddress,
     BigInt amount,
@@ -52,13 +52,16 @@ class TransactionSubmissionService {
     TelemetryService().sendEvent('send_transfer');
 
     // C. Submit and track the transaction
-    await submitAndTrackTransaction(() => BalancesService().balanceTransfer(account, targetAddress, amount), pendingTx);
+    return submitAndTrackTransaction(
+      () => BalancesService().balanceTransfer(account, targetAddress, amount),
+      pendingTx,
+    );
   }
 
   /// Broadcasts a transfer whose signature was produced off-device (e.g. by a
   /// Keystone hardware wallet). The [unsignedData] is rebuilt into an extrinsic
   /// using the externally provided [signature] and [publicKey].
-  Future<void> submitExternallySignedTransfer({
+  Future<String> submitExternallySignedTransfer({
     required Account account,
     required String targetAddress,
     required BigInt amount,
@@ -80,7 +83,7 @@ class TransactionSubmissionService {
 
     TelemetryService().sendEvent('send_transfer_hardware');
 
-    await submitAndTrackTransaction(
+    return submitAndTrackTransaction(
       () => SubstrateService().submitExtrinsicWithExternalSignature(unsignedData, signature, publicKey),
       pendingTx,
     );
@@ -400,7 +403,10 @@ class TransactionSubmissionService {
   /// Retries live in SubstrateService.submitExtrinsic, which resubmits the
   /// same signed bytes. Outer retries would re-sign with a fresh nonce and can
   /// double spend if a prior submit already reached the network.
-  Future<void> submitAndTrackTransaction(Future<Uint8List> Function() submit, PendingTransactionEvent pendingTx) async {
+  Future<String> submitAndTrackTransaction(
+    Future<Uint8List> Function() submit,
+    PendingTransactionEvent pendingTx,
+  ) async {
     try {
       quantusDebugPrint('Submitting transaction: ${pendingTx.id}');
 
@@ -413,6 +419,7 @@ class TransactionSubmissionService {
           .updateState(pendingTx.id, TransactionState.pending, error: pendingTx.error, extrinsicHash: extrinsicHash);
 
       _startPollingForTransaction(pendingTx.copyWith(extrinsicHash: extrinsicHash));
+      return extrinsicHash;
     } catch (e, stackTrace) {
       quantusDebugPrint('Failed to submit transaction ${pendingTx.id}: $e');
       quantusDebugPrint('Stack trace: $stackTrace');

mobile-app/lib/shared/utils/url_utils.dart

@@ -1,5 +1,10 @@
+import 'package:quantus_sdk/quantus_sdk.dart';
 import 'package:url_launcher/url_launcher.dart';
 
+/// Block-explorer URL for an immediate (single-signer) transfer extrinsic.
+String explorerImmediateTransactionUrl(String extrinsicHash) =>
+    '${AppConstants.explorerEndpoint}/immediate-transactions/$extrinsicHash';
+
 Future<void> launchXPost(String xUrl) async {
   final match = RegExp(r'/status/(\d+)').firstMatch(xUrl);
   if (match != null) {

mobile-app/lib/v2/components/explorer_link.dart

@@ -0,0 +1,39 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:resonance_network_wallet/providers/l10n_provider.dart';
+import 'package:resonance_network_wallet/shared/utils/open_external_url.dart';
+import 'package:resonance_network_wallet/v2/theme/app_colors.dart';
+import 'package:resonance_network_wallet/v2/theme/app_text_styles.dart';
+
+/// Underlined "View in Explorer ↗" link that opens [url] in an external
+/// browser. Shared across the send terminal, POS receipt and the
+/// transaction/proposal detail sheets. Renders disabled (non-tappable) when
+/// [url] is null or [enabled] is false; [color] defaults to the tertiary text.
+class ExplorerLink extends ConsumerWidget {
+  final String? url;
+  final Color? color;
+  final bool enabled;
+
+  const ExplorerLink({super.key, required this.url, this.color, this.enabled = true});
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final l10n = ref.watch(l10nProvider);
+    final linkColor = color ?? context.colors.textTertiary;
+    final active = enabled && url != null;
+
+    return GestureDetector(
+      onTap: active ? () => openUrl(url!) : null,
+      child: Container(
+        padding: const EdgeInsets.only(bottom: 3),
+        decoration: BoxDecoration(
+          border: Border(bottom: BorderSide(color: linkColor, width: 1)),
+        ),
+        child: Text(
+          l10n.activityDetailViewExplorer,
+          style: context.themeText.smallParagraph?.copyWith(color: linkColor, fontWeight: FontWeight.w400),
+        ),
+      ),
+    );
+  }
+}

mobile-app/lib/v2/components/qr_scanner_page.dart

@@ -1,7 +1,9 @@
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:image_picker/image_picker.dart';
 import 'package:mobile_scanner/mobile_scanner.dart';
+import 'package:quantus_sdk/quantus_sdk.dart';
 import 'package:resonance_network_wallet/providers/l10n_provider.dart';
 import 'package:resonance_network_wallet/v2/components/quantus_icon_button.dart';
 import 'package:resonance_network_wallet/v2/components/v2_app_bar.dart';
@@ -26,9 +28,13 @@ class _QrScannerPageState extends ConsumerState<QrScannerPage> {
   }
 
   void _onDetect(BarcodeCapture capture) {
-    if (_scanned) return;
     final code = capture.barcodes.firstOrNull?.rawValue;
     if (code == null || code.isEmpty) return;
+    _handleCode(code);
+  }
+
+  void _handleCode(String code) {
+    if (_scanned) return;
     if (widget.validator != null && !widget.validator!(code)) return;
     _scanned = true;
     Navigator.pop(context, code);
@@ -84,6 +90,14 @@ class _QrScannerPageState extends ConsumerState<QrScannerPage> {
                 ),
                 const SizedBox(width: 8),
                 _actionButton(icon: Icons.image_outlined, onTap: _pickImage, colors: colors),
+                if (kDebugMode) ...[
+                  const SizedBox(width: 8),
+                  _actionButton(
+                    icon: Icons.bug_report,
+                    onTap: () => _handleCode(AppConstants.debugTestAddress),
+                    colors: colors,
+                  ),
+                ],
               ],
             ),
           ),

mobile-app/lib/v2/screens/accounts/add_hardware_account_screen.dart

@@ -46,7 +46,7 @@ class _AddHardwareAccountScreenState extends ConsumerState<AddHardwareAccountScr
   }
 
   void _fillDebugAddress() {
-    _address.text = 'qzn5St24cMsjE4JKYdXLBctusWj5zom67dnrW22SweAahLGeG';
+    _address.text = AppConstants.debugTestAddress;
     if (_error != null) setState(() => _error = null);
   }
 

mobile-app/lib/v2/screens/activity/transaction_detail_sheet.dart

@@ -9,9 +9,9 @@ import 'package:resonance_network_wallet/providers/wallet_providers.dart';
 import 'package:resonance_network_wallet/routes.dart';
 import 'package:resonance_network_wallet/shared/extensions/current_route_extensions.dart';
 import 'package:resonance_network_wallet/shared/extensions/transaction_event_extension.dart';
-import 'package:resonance_network_wallet/shared/utils/open_external_url.dart';
 import 'package:resonance_network_wallet/v2/components/amount_display_with_conversion.dart';
 import 'package:resonance_network_wallet/v2/components/bottom_sheet_container.dart';
+import 'package:resonance_network_wallet/v2/components/explorer_link.dart';
 import 'package:resonance_network_wallet/v2/theme/app_colors.dart';
 import 'package:resonance_network_wallet/v2/theme/app_text_styles.dart';
 
@@ -101,7 +101,6 @@ class _TransactionDetailSheet extends ConsumerWidget {
   Widget build(BuildContext context, WidgetRef ref) {
     final l10n = ref.watch(l10nProvider);
     final colors = context.colors;
-    final text = context.themeText;
 
     return BottomSheetContainer(
       title: _title(l10n),
@@ -129,7 +128,7 @@ class _TransactionDetailSheet extends ConsumerWidget {
           _DetailsSection(tx: tx, isSend: _isSend, activeAccountId: activeAccountId, colors: colors),
           const SizedBox(height: 24),
           Center(
-            child: _ExplorerLink(tx: tx, colors: colors, text: text),
+            child: _ExplorerLink(tx: tx, colors: colors),
           ),
           const SizedBox(height: 8),
         ],
@@ -598,13 +597,11 @@ class _DetailRow extends StatelessWidget {
 class _ExplorerLink extends ConsumerWidget {
   final TransactionEvent tx;
   final AppColorsV2 colors;
-  final AppTextTheme text;
 
-  const _ExplorerLink({required this.tx, required this.colors, required this.text});
+  const _ExplorerLink({required this.tx, required this.colors});
 
   @override
   Widget build(BuildContext context, WidgetRef ref) {
-    final l10n = ref.watch(l10nProvider);
     final isPending =
         tx is PendingTransactionEvent ||
         tx is PendingMultisigCreationEvent ||
@@ -613,22 +610,10 @@ class _ExplorerLink extends ConsumerWidget {
         tx is PendingMultisigCancellationEvent;
     final color = isPending ? colors.accentOrange.withValues(alpha: 0.3) : colors.accentOrange;
 
-    return GestureDetector(
-      onTap: isPending ? null : () => _openExplorer(),
-      child: Container(
-        padding: const EdgeInsets.only(bottom: 2),
-        decoration: BoxDecoration(
-          border: Border(bottom: BorderSide(color: color, width: 1)),
-        ),
-        child: Text(
-          l10n.activityDetailViewExplorer,
-          style: text.smallParagraph?.copyWith(color: color, fontWeight: FontWeight.w400),
-        ),
-      ),
-    );
+    return ExplorerLink(url: _explorerUrl(), color: color, enabled: !isPending);
   }
 
-  void _openExplorer() {
+  String? _explorerUrl() {
     final isMinerReward = tx.isMinerReward;
     final isMultisigCreated = tx.isMultisigCreated;
     final isProposalCreated = tx.isProposalCreation;
@@ -666,6 +651,6 @@ class _ExplorerLink extends ConsumerWidget {
       path = '$transactionType/${tx.blockHash}';
     }
 
-    if (path != null) openUrl('${AppConstants.explorerEndpoint}/$path');
+    return path == null ? null : '${AppConstants.explorerEndpoint}/$path';
   }
 }

mobile-app/lib/v2/screens/home/home_screen.dart

@@ -23,8 +23,9 @@ import 'package:resonance_network_wallet/v2/screens/activity/transaction_detail_
 import 'package:resonance_network_wallet/v2/screens/receive/receive_screen.dart';
 import 'package:resonance_network_wallet/v2/screens/multisig/multisig_activity_section.dart';
 import 'package:resonance_network_wallet/v2/screens/multisig/multisig_proposal_detail_sheet.dart';
-import 'package:resonance_network_wallet/v2/screens/multisig/propose/propose_recipient_screen.dart';
 import 'package:resonance_network_wallet/v2/screens/send/input_amount_screen.dart';
+import 'package:resonance_network_wallet/v2/screens/send/multisig_propose_strategy.dart';
+import 'package:resonance_network_wallet/v2/screens/send/regular_send_strategy.dart';
 import 'package:resonance_network_wallet/v2/screens/send/select_recipient_screen.dart';
 import 'package:resonance_network_wallet/v2/screens/settings/settings_screen.dart';
 import 'package:resonance_network_wallet/v2/screens/pos/pos_amount_screen.dart';
@@ -96,7 +97,12 @@ class _HomeScreenState extends ConsumerState<HomeScreen> {
     ref.read(paymentIntentProvider.notifier).state = null;
 
     final pageRoute = MaterialPageRoute(
-      builder: (_) => InputAmountScreen(recipientAddress: payment.to, initialAmount: payment.amount, isPayMode: true),
+      builder: (_) => InputAmountScreen(
+        strategy: const RegularSendStrategy(),
+        recipientAddress: payment.to,
+        initialAmount: payment.amount,
+        isPayMode: true,
+      ),
       settings: inputAmountScreenRouteSettings,
     );
 
@@ -322,7 +328,10 @@ class _HomeScreenState extends ConsumerState<HomeScreen> {
     final sendCard = _actionCard(
       iconAsset: 'assets/v2/action_send.svg',
       label: l10n.homeSend,
-      onTap: () => Navigator.push(context, MaterialPageRoute(builder: (_) => const SelectRecipientScreen())),
+      onTap: () => Navigator.push(
+        context,
+        MaterialPageRoute(builder: (_) => const SelectRecipientScreen(strategy: RegularSendStrategy())),
+      ),
     );
 
     final swapCard = _actionCard(
@@ -357,7 +366,12 @@ class _HomeScreenState extends ConsumerState<HomeScreen> {
         _actionCard(
           iconAsset: 'assets/v2/action_send.svg',
           label: l10n.multisigProposeTitle,
-          onTap: () => Navigator.push(context, MaterialPageRoute(builder: (_) => ProposeRecipientScreen(msig: msig))),
+          onTap: () => Navigator.push(
+            context,
+            MaterialPageRoute(
+              builder: (_) => SelectRecipientScreen(strategy: MultisigProposeStrategy(msig: msig)),
+            ),
+          ),
         ),
       ],
     );

mobile-app/lib/v2/screens/multisig/multisig_proposal_detail_sheet.dart

@@ -14,10 +14,10 @@ import 'package:resonance_network_wallet/providers/wallet_providers.dart';
 import 'package:resonance_network_wallet/v2/components/multisig_expiry_value.dart';
 import 'package:resonance_network_wallet/routes.dart';
 import 'package:resonance_network_wallet/shared/extensions/current_route_extensions.dart';
-import 'package:resonance_network_wallet/shared/utils/open_external_url.dart';
 import 'package:resonance_network_wallet/v2/components/amount_display_with_conversion.dart';
 import 'package:resonance_network_wallet/v2/components/bottom_sheet_container.dart';
 import 'package:resonance_network_wallet/v2/components/detail_summary_row.dart';
+import 'package:resonance_network_wallet/v2/components/explorer_link.dart';
 import 'package:resonance_network_wallet/v2/components/loader.dart';
 import 'package:resonance_network_wallet/v2/components/quantus_button.dart';
 import 'package:resonance_network_wallet/v2/screens/multisig/multisig_approve_confirm_sheet.dart';
@@ -232,7 +232,10 @@ class _MultisigProposalDetailSheet extends ConsumerWidget {
             isActionable: isActionable,
           ),
           Center(
-            child: _ExplorerLink(proposal: liveProposal, colors: colors, text: text),
+            child: ExplorerLink(
+              url: '${AppConstants.explorerEndpoint}/multisig-proposals/${liveProposal.explorerProposalId}',
+              color: colors.accentOrange,
+            ),
           ),
           const SizedBox(height: 8),
         ],
@@ -627,30 +630,3 @@ class _AmountSection extends ConsumerWidget {
     return AmountDisplayWithConversion(amountDisplay: amount);
   }
 }
-
-class _ExplorerLink extends ConsumerWidget {
-  final MultisigProposal proposal;
-  final AppColorsV2 colors;
-  final AppTextTheme text;
-
-  const _ExplorerLink({required this.proposal, required this.colors, required this.text});
-
-  @override
-  Widget build(BuildContext context, WidgetRef ref) {
-    final l10n = ref.watch(l10nProvider);
-
-    return GestureDetector(
-      onTap: () => openUrl('${AppConstants.explorerEndpoint}/multisig-proposals/${proposal.explorerProposalId}'),
-      child: Container(
-        padding: const EdgeInsets.only(bottom: 2),
-        decoration: BoxDecoration(
-          border: Border(bottom: BorderSide(color: colors.accentOrange, width: 1)),
-        ),
-        child: Text(
-          l10n.activityDetailViewExplorer,
-          style: text.smallParagraph?.copyWith(color: colors.accentOrange, fontWeight: FontWeight.w400),
-        ),
-      ),
-    );
-  }
-}