Feat/faster ur scans

cold-wallet-app/lib/screens/scan_transaction_screen.dart

@@ -18,7 +18,12 @@ class ScanTransactionScreen extends StatefulWidget {
 }
 
 class _ScanTransactionScreenState extends State<ScanTransactionScreen> {
-  final MobileScannerController _controller = MobileScannerController();
+  // Unrestricted: deliver every decoded camera frame; dedup happens via _parts.
+  // QR-only: skipping the other symbologies shortens per-frame detection.
+  final MobileScannerController _controller = MobileScannerController(
+    detectionSpeed: DetectionSpeed.unrestricted,
+    formats: const [BarcodeFormat.qrCode],
+  );
   final Set<String> _parts = {};
   final Set<int> _seenSeq = {};
   final RegExp _seqPattern = RegExp(r'/(\d+)-(\d+)/');

cold-wallet-app/lib/screens/sign_transaction_screen.dart

@@ -31,6 +31,11 @@ class SignTransactionScreen extends ConsumerStatefulWidget {
 }
 
 class _SignTransactionScreenState extends ConsumerState<SignTransactionScreen> {
+  /// Tuning knobs for the animated signature QR (7 KB payload): bytes per frame
+  /// and how long each frame is shown. Larger fragments mean fewer, denser QRs.
+  static const _kUrFragmentLength = 1500;
+  static const _kUrFrameInterval = Duration(milliseconds: 100);
+
   final ScrollController _scrollController = ScrollController();
 
   ParsedPayload? _parsed;
@@ -101,7 +106,7 @@ class _SignTransactionScreenState extends ConsumerState<SignTransactionScreen> {
         keypair: keypair,
         message: QuantusSigningPayload.signablePayload(widget.payload),
       );
-      final parts = encodeUr(data: signed);
+      final parts = encodeUr(data: signed, maxFragmentLength: _kUrFragmentLength);
       setState(() {
         _signing = false;
         _signatureUr = parts;
@@ -400,7 +405,14 @@ class _SignTransactionScreenState extends ConsumerState<SignTransactionScreen> {
               textAlign: TextAlign.center,
             ),
             const SizedBox(height: 24),
-            Center(child: AnimatedUrQr(parts: parts)),
+            Center(
+              child: AnimatedUrQr(
+                parts: parts,
+                interval: _kUrFrameInterval,
+                // Dense frames need as many screen pixels per QR module as possible.
+                size: (MediaQuery.sizeOf(context).width - 48).clamp(280.0, 500.0),
+              ),
+            ),
             const SizedBox(height: 16),
             if (parts.length > 1)
               Text(

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

@@ -64,7 +64,12 @@ class AnimatedQrScanner extends StatefulWidget {
 }
 
 class _AnimatedQrScannerState extends State<AnimatedQrScanner> {
-  final MobileScannerController _controller = MobileScannerController();
+  // Unrestricted: deliver every decoded camera frame; dedup happens via _parts.
+  // QR-only: skipping the other symbologies shortens per-frame detection.
+  final MobileScannerController _controller = MobileScannerController(
+    detectionSpeed: DetectionSpeed.unrestricted,
+    formats: const [BarcodeFormat.qrCode],
+  );
   final Set<String> _parts = {};
   final Set<int> _seenSequenceIndexes = {};
 

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

@@ -18,7 +18,7 @@ class QrScannerPage extends ConsumerStatefulWidget {
 }
 
 class _QrScannerPageState extends ConsumerState<QrScannerPage> {
-  final _controller = MobileScannerController();
+  final _controller = MobileScannerController(formats: const [BarcodeFormat.qrCode]);
   bool _scanned = false;
 
   @override

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

@@ -0,0 +1,30 @@
+import 'package:flutter/material.dart';
+import 'package:resonance_network_wallet/v2/theme/app_text_styles.dart';
+
+/// Centered tappable underlined text, used for secondary actions under a
+/// primary button (e.g. "Cancel Transaction").
+class UnderlinedTextLink extends StatelessWidget {
+  final String label;
+  final Color color;
+  final VoidCallback onTap;
+
+  const UnderlinedTextLink({super.key, required this.label, required this.color, required this.onTap});
+
+  @override
+  Widget build(BuildContext context) {
+    return GestureDetector(
+      onTap: onTap,
+      behavior: HitTestBehavior.opaque,
+      child: Center(
+        child: Text(
+          label,
+          style: context.themeText.smallParagraph?.copyWith(
+            color: color,
+            decoration: TextDecoration.underline,
+            decorationColor: color,
+          ),
+        ),
+      ),
+    );
+  }
+}

mobile-app/lib/v2/screens/send/keystone_sign_screen.dart

@@ -35,6 +35,12 @@ class KeystoneSignScreen extends ConsumerStatefulWidget {
 }
 
 class _KeystoneSignScreenState extends ConsumerState<KeystoneSignScreen> {
+  /// Bytes per QR frame for the animated payload. The Keystone device scans
+  /// this QR, so frames must stay easy to read. SCALE-encoded transactions are
+  /// ~300 bytes, so 400-byte fragments put a typical transaction in a single
+  /// static QR (~version 21, well within Keystone's range).
+  static const _kUrFragmentLength = 400;
+
   UnsignedTransactionData? _unsignedData;
   List<String>? _urParts;
   String? _error;
@@ -65,7 +71,7 @@ class _KeystoneSignScreenState extends ConsumerState<KeystoneSignScreen> {
         widget.session.account,
         widget.session.buildCall(),
       );
-      final parts = encodeUr(data: unsigned.encodedPayloadRaw);
+      final parts = encodeUr(data: unsigned.encodedPayloadRaw, maxFragmentLength: _kUrFragmentLength);
       if (parts.isEmpty) throw Exception('Failed to encode transaction payload as UR');
       if (cacheKey != null) {
         ref.read(keystoneSignCacheProvider.notifier).store(key: cacheKey, unsignedData: unsigned, urParts: parts);

quantus_sdk/lib/src/rust/api/ur.dart

@@ -8,6 +8,7 @@ import 'package:flutter_rust_bridge/flutter_rust_bridge_for_generated.dart';
 
 Uint8List decodeUr({required List<String> urParts}) => RustLib.instance.api.crateApiUrDecodeUr(urParts: urParts);
 
-List<String> encodeUr({required List<int> data}) => RustLib.instance.api.crateApiUrEncodeUr(data: data);
+List<String> encodeUr({required List<int> data, int? maxFragmentLength}) =>
+    RustLib.instance.api.crateApiUrEncodeUr(data: data, maxFragmentLength: maxFragmentLength);
 
 bool isCompleteUr({required List<String> urParts}) => RustLib.instance.api.crateApiUrIsCompleteUr(urParts: urParts);

quantus_sdk/lib/src/rust/frb_generated.dart

@@ -106,7 +106,7 @@ abstract class RustLibApi extends BaseApi {
 
   WormholeResult crateApiCryptoDeriveWormhole({required String mnemonicStr, required String path});
 
-  List<String> crateApiUrEncodeUr({required List<int> data});
+  List<String> crateApiUrEncodeUr({required List<int> data, int? maxFragmentLength});
 
   Future<String> crateApiWormholeEnsureCircuitBinaries({required String binsDir});
 
@@ -451,23 +451,25 @@ class RustLibApiImpl extends RustLibApiImplPlatform implements RustLibApi {
       const TaskConstMeta(debugName: 'derive_wormhole', argNames: ['mnemonicStr', 'path']);
 
   @override
-  List<String> crateApiUrEncodeUr({required List<int> data}) {
+  List<String> crateApiUrEncodeUr({required List<int> data, int? maxFragmentLength}) {
     return handler.executeSync(
       SyncTask(
         callFfi: () {
           final serializer = SseSerializer(generalizedFrbRustBinding);
           sse_encode_list_prim_u_8_loose(data, serializer);
+          sse_encode_opt_box_autoadd_u_32(maxFragmentLength, serializer);
           return pdeCallFfi(generalizedFrbRustBinding, serializer, funcId: 14)!;
         },
         codec: SseCodec(decodeSuccessData: sse_decode_list_String, decodeErrorData: sse_decode_String),
         constMeta: kCrateApiUrEncodeUrConstMeta,
-        argValues: [data],
+        argValues: [data, maxFragmentLength],
         apiImpl: this,
       ),
     );
   }
 
-  TaskConstMeta get kCrateApiUrEncodeUrConstMeta => const TaskConstMeta(debugName: 'encode_ur', argNames: ['data']);
+  TaskConstMeta get kCrateApiUrEncodeUrConstMeta =>
+      const TaskConstMeta(debugName: 'encode_ur', argNames: ['data', 'maxFragmentLength']);
 
   @override
   Future<String> crateApiWormholeEnsureCircuitBinaries({required String binsDir}) {
@@ -924,6 +926,12 @@ class RustLibApiImpl extends RustLibApiImplPlatform implements RustLibApi {
     return dco_decode_proof_input(raw);
   }
 
+  @protected
+  int dco_decode_box_autoadd_u_32(dynamic raw) {
+    // Codec=Dco (DartCObject based), see doc to use other codecs
+    return raw as int;
+  }
+
   @protected
   Keypair dco_decode_keypair(dynamic raw) {
     // Codec=Dco (DartCObject based), see doc to use other codecs
@@ -970,6 +978,12 @@ class RustLibApiImpl extends RustLibApiImplPlatform implements RustLibApi {
     );
   }
 
+  @protected
+  int? dco_decode_opt_box_autoadd_u_32(dynamic raw) {
+    // Codec=Dco (DartCObject based), see doc to use other codecs
+    return raw == null ? null : dco_decode_box_autoadd_u_32(raw);
+  }
+
   @protected
   U8Array32? dco_decode_opt_u_8_array_32(dynamic raw) {
     // Codec=Dco (DartCObject based), see doc to use other codecs
@@ -1110,6 +1124,12 @@ class RustLibApiImpl extends RustLibApiImplPlatform implements RustLibApi {
     return (sse_decode_proof_input(deserializer));
   }
 
+  @protected
+  int sse_decode_box_autoadd_u_32(SseDeserializer deserializer) {
+    // Codec=Sse (Serialization based), see doc to use other codecs
+    return (sse_decode_u_32(deserializer));
+  }
+
   @protected
   Keypair sse_decode_keypair(SseDeserializer deserializer) {
     // Codec=Sse (Serialization based), see doc to use other codecs
@@ -1164,6 +1184,17 @@ class RustLibApiImpl extends RustLibApiImplPlatform implements RustLibApi {
     return MerkleProcessed(sortedSiblingsFlat: var_sortedSiblingsFlat, positions: var_positions);
   }
 
+  @protected
+  int? sse_decode_opt_box_autoadd_u_32(SseDeserializer deserializer) {
+    // Codec=Sse (Serialization based), see doc to use other codecs
+
+    if (sse_decode_bool(deserializer)) {
+      return (sse_decode_box_autoadd_u_32(deserializer));
+    } else {
+      return null;
+    }
+  }
+
   @protected
   U8Array32? sse_decode_opt_u_8_array_32(SseDeserializer deserializer) {
     // Codec=Sse (Serialization based), see doc to use other codecs
@@ -1327,6 +1358,12 @@ class RustLibApiImpl extends RustLibApiImplPlatform implements RustLibApi {
     sse_encode_proof_input(self, serializer);
   }
 
+  @protected
+  void sse_encode_box_autoadd_u_32(int self, SseSerializer serializer) {
+    // Codec=Sse (Serialization based), see doc to use other codecs
+    sse_encode_u_32(self, serializer);
+  }
+
   @protected
   void sse_encode_keypair(Keypair self, SseSerializer serializer) {
     // Codec=Sse (Serialization based), see doc to use other codecs
@@ -1373,6 +1410,16 @@ class RustLibApiImpl extends RustLibApiImplPlatform implements RustLibApi {
     sse_encode_list_prim_u_8_strict(self.positions, serializer);
   }
 
+  @protected
+  void sse_encode_opt_box_autoadd_u_32(int? self, SseSerializer serializer) {
+    // Codec=Sse (Serialization based), see doc to use other codecs
+
+    sse_encode_bool(self != null, serializer);
+    if (self != null) {
+      sse_encode_box_autoadd_u_32(self, serializer);
+    }
+  }
+
   @protected
   void sse_encode_opt_u_8_array_32(U8Array32? self, SseSerializer serializer) {
     // Codec=Sse (Serialization based), see doc to use other codecs

quantus_sdk/lib/src/rust/frb_generated.io.dart

@@ -44,6 +44,9 @@ abstract class RustLibApiImplPlatform extends BaseApiImpl<RustLibWire> {
   @protected
   ProofInput dco_decode_box_autoadd_proof_input(dynamic raw);
 
+  @protected
+  int dco_decode_box_autoadd_u_32(dynamic raw);
+
   @protected
   Keypair dco_decode_keypair(dynamic raw);
 
@@ -62,6 +65,9 @@ abstract class RustLibApiImplPlatform extends BaseApiImpl<RustLibWire> {
   @protected
   MerkleProcessed dco_decode_merkle_processed(dynamic raw);
 
+  @protected
+  int? dco_decode_opt_box_autoadd_u_32(dynamic raw);
+
   @protected
   U8Array32? dco_decode_opt_u_8_array_32(dynamic raw);
 
@@ -117,6 +123,9 @@ abstract class RustLibApiImplPlatform extends BaseApiImpl<RustLibWire> {
   @protected
   ProofInput sse_decode_box_autoadd_proof_input(SseDeserializer deserializer);
 
+  @protected
+  int sse_decode_box_autoadd_u_32(SseDeserializer deserializer);
+
   @protected
   Keypair sse_decode_keypair(SseDeserializer deserializer);
 
@@ -135,6 +144,9 @@ abstract class RustLibApiImplPlatform extends BaseApiImpl<RustLibWire> {
   @protected
   MerkleProcessed sse_decode_merkle_processed(SseDeserializer deserializer);
 
+  @protected
+  int? sse_decode_opt_box_autoadd_u_32(SseDeserializer deserializer);
+
   @protected
   U8Array32? sse_decode_opt_u_8_array_32(SseDeserializer deserializer);
 
@@ -195,6 +207,9 @@ abstract class RustLibApiImplPlatform extends BaseApiImpl<RustLibWire> {
   @protected
   void sse_encode_box_autoadd_proof_input(ProofInput self, SseSerializer serializer);
 
+  @protected
+  void sse_encode_box_autoadd_u_32(int self, SseSerializer serializer);
+
   @protected
   void sse_encode_keypair(Keypair self, SseSerializer serializer);
 
@@ -213,6 +228,9 @@ abstract class RustLibApiImplPlatform extends BaseApiImpl<RustLibWire> {
   @protected
   void sse_encode_merkle_processed(MerkleProcessed self, SseSerializer serializer);
 
+  @protected
+  void sse_encode_opt_box_autoadd_u_32(int? self, SseSerializer serializer);
+
   @protected
   void sse_encode_opt_u_8_array_32(U8Array32? self, SseSerializer serializer);
 

quantus_sdk/lib/src/rust/frb_generated.web.dart

@@ -46,6 +46,9 @@ abstract class RustLibApiImplPlatform extends BaseApiImpl<RustLibWire> {
   @protected
   ProofInput dco_decode_box_autoadd_proof_input(dynamic raw);
 
+  @protected
+  int dco_decode_box_autoadd_u_32(dynamic raw);
+
   @protected
   Keypair dco_decode_keypair(dynamic raw);
 
@@ -64,6 +67,9 @@ abstract class RustLibApiImplPlatform extends BaseApiImpl<RustLibWire> {
   @protected
   MerkleProcessed dco_decode_merkle_processed(dynamic raw);
 
+  @protected
+  int? dco_decode_opt_box_autoadd_u_32(dynamic raw);
+
   @protected
   U8Array32? dco_decode_opt_u_8_array_32(dynamic raw);
 
@@ -119,6 +125,9 @@ abstract class RustLibApiImplPlatform extends BaseApiImpl<RustLibWire> {
   @protected
   ProofInput sse_decode_box_autoadd_proof_input(SseDeserializer deserializer);
 
+  @protected
+  int sse_decode_box_autoadd_u_32(SseDeserializer deserializer);
+
   @protected
   Keypair sse_decode_keypair(SseDeserializer deserializer);
 
@@ -137,6 +146,9 @@ abstract class RustLibApiImplPlatform extends BaseApiImpl<RustLibWire> {
   @protected
   MerkleProcessed sse_decode_merkle_processed(SseDeserializer deserializer);
 
+  @protected
+  int? sse_decode_opt_box_autoadd_u_32(SseDeserializer deserializer);
+
   @protected
   U8Array32? sse_decode_opt_u_8_array_32(SseDeserializer deserializer);
 
@@ -197,6 +209,9 @@ abstract class RustLibApiImplPlatform extends BaseApiImpl<RustLibWire> {
   @protected
   void sse_encode_box_autoadd_proof_input(ProofInput self, SseSerializer serializer);
 
+  @protected
+  void sse_encode_box_autoadd_u_32(int self, SseSerializer serializer);
+
   @protected
   void sse_encode_keypair(Keypair self, SseSerializer serializer);
 
@@ -215,6 +230,9 @@ abstract class RustLibApiImplPlatform extends BaseApiImpl<RustLibWire> {
   @protected
   void sse_encode_merkle_processed(MerkleProcessed self, SseSerializer serializer);
 
+  @protected
+  void sse_encode_opt_box_autoadd_u_32(int? self, SseSerializer serializer);
+
   @protected
   void sse_encode_opt_u_8_array_32(U8Array32? self, SseSerializer serializer);