Nano rep page + derivation fixes (#1655)

* minor nano derivation fixes

* rep page fixes

* ignore non-critical receive block errors

* really be sure the derivation type is set during wallet creation

cw_nano/lib/nano_client.dart

@@ -466,21 +466,25 @@ class NanoClient {
 
     blocks = blocks as Map<String, dynamic>;
 
-    // confirm all receivable blocks:
-    for (final blockHash in blocks.keys) {
-      final block = blocks[blockHash];
-      final String amountRaw = block["amount"] as String;
-      await receiveBlock(
-        blockHash: blockHash,
-        amountRaw: amountRaw,
-        privateKey: privateKey,
-        destinationAddress: destinationAddress,
-      );
-      // a bit of a hack:
-      await Future<void>.delayed(const Duration(seconds: 2));
+    try {
+      // confirm all receivable blocks:
+      for (final blockHash in blocks.keys) {
+        final block = blocks[blockHash];
+        final String amountRaw = block["amount"] as String;
+        await receiveBlock(
+          blockHash: blockHash,
+          amountRaw: amountRaw,
+          privateKey: privateKey,
+          destinationAddress: destinationAddress,
+        );
+        // a bit of a hack:
+        await Future<void>.delayed(const Duration(seconds: 2));
+      }
+      return blocks.keys.length;
+    } catch (_) {
+      // we failed to confirm all receivable blocks for w/e reason (PoW / node outage / etc)
+      return 0;
     }
-
-    return blocks.keys.length;
   }
 
   void stop() {}

cw_nano/lib/nano_wallet_service.dart

@@ -14,8 +14,11 @@ import 'package:bip39/bip39.dart' as bip39;
 import 'package:nanodart/nanodart.dart';
 import 'package:nanoutil/nanoutil.dart';
 
-class NanoWalletService extends WalletService<NanoNewWalletCredentials,
-    NanoRestoreWalletFromSeedCredentials, NanoRestoreWalletFromKeysCredentials, NanoNewWalletCredentials> {
+class NanoWalletService extends WalletService<
+    NanoNewWalletCredentials,
+    NanoRestoreWalletFromSeedCredentials,
+    NanoRestoreWalletFromKeysCredentials,
+    NanoNewWalletCredentials> {
   NanoWalletService(this.walletInfoSource, this.isDirect);
 
   final Box<WalletInfo> walletInfoSource;
@@ -33,8 +36,12 @@ class NanoWalletService extends WalletService<NanoNewWalletCredentials,
     String seedKey = NanoSeeds.generateSeed();
     String mnemonic = NanoDerivations.standardSeedToMnemonic(seedKey);
 
-    // ensure default if not present:
-    credentials.walletInfo!.derivationInfo ??= DerivationInfo(derivationType: DerivationType.nano);
+    // should never happen but just in case:
+    if (credentials.walletInfo!.derivationInfo == null) {
+      credentials.walletInfo!.derivationInfo = DerivationInfo(derivationType: DerivationType.nano);
+    } else if (credentials.walletInfo!.derivationInfo!.derivationType == null) {
+      credentials.walletInfo!.derivationInfo!.derivationType = DerivationType.nano;
+    }
 
     final wallet = NanoWallet(
       walletInfo: credentials.walletInfo!,
@@ -86,7 +93,8 @@ class NanoWalletService extends WalletService<NanoNewWalletCredentials,
   }
 
   @override
-  Future<NanoWallet> restoreFromKeys(NanoRestoreWalletFromKeysCredentials credentials, {bool? isTestnet}) async {
+  Future<NanoWallet> restoreFromKeys(NanoRestoreWalletFromKeysCredentials credentials,
+      {bool? isTestnet}) async {
     if (credentials.seedKey.contains(' ')) {
       throw Exception("Invalid key!");
     } else {
@@ -106,6 +114,13 @@ class NanoWalletService extends WalletService<NanoNewWalletCredentials,
       }
     }
 
+    // should never happen but just in case:
+    if (credentials.walletInfo!.derivationInfo == null) {
+      credentials.walletInfo!.derivationInfo = DerivationInfo(derivationType: DerivationType.nano);
+    } else if (credentials.walletInfo!.derivationInfo!.derivationType == null) {
+      credentials.walletInfo!.derivationInfo!.derivationType = DerivationType.nano;
+    }
+
     final wallet = await NanoWallet(
       password: credentials.password!,
       mnemonic: mnemonic ?? credentials.seedKey,
@@ -119,11 +134,13 @@ class NanoWalletService extends WalletService<NanoNewWalletCredentials,
 
   @override
   Future<NanoWallet> restoreFromHardwareWallet(NanoNewWalletCredentials credentials) {
-    throw UnimplementedError("Restoring a Nano wallet from a hardware wallet is not yet supported!");
+    throw UnimplementedError(
+        "Restoring a Nano wallet from a hardware wallet is not yet supported!");
   }
 
   @override
-  Future<NanoWallet> restoreFromSeed(NanoRestoreWalletFromSeedCredentials credentials, {bool? isTestnet}) async {
+  Future<NanoWallet> restoreFromSeed(NanoRestoreWalletFromSeedCredentials credentials,
+      {bool? isTestnet}) async {
     if (credentials.mnemonic.contains(' ')) {
       if (!bip39.validateMnemonic(credentials.mnemonic)) {
         throw nm.NanoMnemonicIsIncorrectException();

lib/src/screens/nano/nano_change_rep_page.dart

@@ -40,13 +40,11 @@ class NanoChangeRepPage extends BasePage {
       (node) => node.account == currentRepAccount,
       orElse: () => N2Node(
         account: currentRepAccount,
-        alias: currentRepAccount,
         score: 0,
         uptime: "???",
         weight: 0,
       ),
     );
-
     return currentNode;
   }
 
@@ -57,9 +55,7 @@ class NanoChangeRepPage extends BasePage {
       child: FutureBuilder(
         future: nano!.getN2Reps(_wallet),
         builder: (context, snapshot) {
-          if (snapshot.data == null) {
-            return SizedBox();
-          }
+          final reps = snapshot.data ?? [];
 
           return Container(
             padding: EdgeInsets.only(left: 24, right: 24),
@@ -101,29 +97,35 @@ class NanoChangeRepPage extends BasePage {
                       ),
                       _buildSingleRepresentative(
                         context,
-                        getCurrentRepNode(snapshot.data as List<N2Node>),
+                        getCurrentRepNode(reps),
                         isList: false,
+                        divider: false,
                       ),
-                      Divider(height: 20),
-                      Container(
-                        margin: EdgeInsets.only(top: 12),
-                        child: Text(
-                          S.current.nano_pick_new_rep,
-                          style: TextStyle(
-                            fontSize: 16,
-                            fontWeight: FontWeight.w700,
+                      if (reps.isNotEmpty) ...[
+                        Divider(height: 20),
+                        Container(
+                          margin: EdgeInsets.only(top: 12),
+                          child: Text(
+                            S.current.nano_pick_new_rep,
+                            style: TextStyle(
+                              fontSize: 16,
+                              fontWeight: FontWeight.w700,
+                            ),
                           ),
                         ),
-                      ),
+                        Divider(height: 20),
+                      ],
                     ],
                   ),
                 ],
               ),
               contentPadding: EdgeInsets.only(bottom: 24),
               content: Container(
-                child: Column(
-                  children: _getRepresentativeWidgets(context, snapshot.data as List<N2Node>),
-                ),
+                child: reps.isNotEmpty
+                    ? Column(
+                        children: _getRepresentativeWidgets(context, reps),
+                      )
+                    : SizedBox(),
               ),
               bottomSectionPadding: EdgeInsets.only(bottom: 24),
               bottomSection: Observer(
@@ -207,19 +209,22 @@ class NanoChangeRepPage extends BasePage {
     final List<Widget> ret = [];
     for (final N2Node node in list) {
       if (node.alias != null && node.alias!.trim().isNotEmpty) {
-        ret.add(_buildSingleRepresentative(context, node));
+        bool divider = node != list.first;
+        ret.add(_buildSingleRepresentative(context, node, divider: divider, isList: true));
       }
     }
     return ret;
   }
 
-  Widget _buildSingleRepresentative(BuildContext context, N2Node rep, {bool isList = true}) {
+  Widget _buildSingleRepresentative(
+    BuildContext context,
+    N2Node rep, {
+    bool isList = true,
+    bool divider = false,
+  }) {
     return Column(
       children: <Widget>[
-        if (isList)
-          Divider(
-            height: 2,
-          ),
+        if (divider) Divider(height: 2),
         TextButton(
           style: TextButton.styleFrom(
             padding: EdgeInsets.zero,
@@ -244,11 +249,11 @@ class NanoChangeRepPage extends BasePage {
                     crossAxisAlignment: CrossAxisAlignment.start,
                     children: <Widget>[
                       Text(
-                        _sanitizeAlias(rep.alias),
+                        rep.alias ?? rep.account!,
                         style: TextStyle(
                           color: Theme.of(context).extension<CakeTextTheme>()!.titleColor,
                           fontWeight: FontWeight.w700,
-                          fontSize: 18,
+                          fontSize: rep.alias == null ? 14 : 18,
                         ),
                       ),
                       Container(
@@ -337,11 +342,4 @@ class NanoChangeRepPage extends BasePage {
       ],
     );
   }
-
-  String _sanitizeAlias(String? alias) {
-    if (alias != null) {
-      return alias.replaceAll(RegExp(r'[^a-zA-Z_.!?_;:-]'), '');
-    }
-    return '';
-  }
 }

lib/view_model/wallet_restore_view_model.dart

@@ -42,7 +42,8 @@ abstract class WalletRestoreViewModelBase extends WalletCreationVM with Store {
             type == WalletType.tron,
         isButtonEnabled = false,
         mode = WalletRestoreMode.seed,
-        super(appStore, walletInfoSource, walletCreationService, seedSettingsViewModel, type: type, isRecovery: true) {
+        super(appStore, walletInfoSource, walletCreationService, seedSettingsViewModel,
+            type: type, isRecovery: true) {
     switch (type) {
       case WalletType.monero:
         availableModes = WalletRestoreMode.values;
@@ -194,10 +195,11 @@ abstract class WalletRestoreViewModelBase extends WalletCreationVM with Store {
 
         case WalletType.nano:
           return nano!.createNanoRestoreWalletFromKeysCredentials(
-              name: name,
-              password: password,
-              seedKey: options['private_key'] as String,
-              derivationType: options["derivationType"] as DerivationType);
+            name: name,
+            password: password,
+            seedKey: options['private_key'] as String,
+            derivationType: derivationInfo!.derivationType!,
+          );
         case WalletType.polygon:
           return polygon!.createPolygonRestoreWalletFromPrivateKey(
             name: name,