feat: add support for Zcash names resolution (#3237)

* feat: Add memo support for swap

* fix: Error on swap page select receiver bottomsheet when picking receiveing currency that's not a wallet type

* feat: exclude providers that do not support memo when receive currency needs it, also show passed memo in confirmation and trade history sheets

* fix: overflow for destination tag on swap confirmation

* feat: add support for Zcash names resolution

* fix conflict because github is shit

---------

Co-authored-by: Omar Hatem <omarh.ismail1@gmail.com>

lib/entities/parse_address_from_domain.dart

@@ -9,6 +9,7 @@ import 'package:cake_wallet/entities/parsed_address.dart';
 import 'package:cake_wallet/entities/unstoppable_domain_address.dart';
 import 'package:cake_wallet/entities/wellknown_record.dart';
 import 'package:cake_wallet/entities/zano_alias.dart';
+import 'package:cake_wallet/entities/zcash_names_record.dart';
 import 'package:cake_wallet/exchange/provider/thorchain_exchange.provider.dart';
 import 'package:cake_wallet/mastodon/mastodon_api.dart';
 import 'package:cake_wallet/nostr/nostr_api.dart';
@@ -458,6 +459,16 @@ class AddressResolver {
         }
       }
 
+      final lowerText = text.toLowerCase();
+      if (lowerText.endsWith(".zec") || lowerText.endsWith(".zcash")) {
+        if (settingsStore.lookupsZcashNames) {
+          final address = await ZcashNamesRecord.fetchZcashNamesAddress(text);
+          if (address != null && address.isNotEmpty) {
+            return ParsedAddress.zcashNameAddress(address: address, name: text);
+          }
+        }
+      }
+
       if (text.endsWith(".eth")) {
         if (settingsStore.lookupsENS) {
           final address = await EnsRecord.fetchEnsAddress(text, wallet: wallet);

lib/entities/parsed_address.dart

@@ -16,6 +16,7 @@ enum ParseFrom {
   wellKnown,
   zanoAlias,
   zcashAddress,
+  zcashName,
   bip353,
   lnurlpay,
 }
@@ -177,6 +178,14 @@ class ParsedAddress {
     );
   }
 
+  factory ParsedAddress.zcashNameAddress({required String address, required String name}) {
+    return ParsedAddress(
+      addresses: [address],
+      name: name,
+      parseFrom: ParseFrom.zcashName,
+    );
+  }
+
   factory ParsedAddress.fetchWellKnownAddress({required String address, required String name}) {
     return ParsedAddress(
       addresses: [address],

lib/entities/preferences_key.dart

@@ -101,6 +101,7 @@ class PreferencesKey {
   static const lookupsUnstoppableDomains = 'looks_up_unstoppable_domain';
   static const lookupsOpenAlias = 'looks_up_open_alias';
   static const lookupsENS = 'looks_up_ens';
+  static const lookupsZcashNames = 'looks_up_zcash_names';
   static const lookupsWellKnown = 'looks_up_well_known';
   static const useBlinkProtection = 'use_blink_protection';
   static const usePayjoin = 'use_payjoin';

lib/entities/zcash_names_record.dart

@@ -0,0 +1,75 @@
+import 'dart:async';
+import 'dart:convert';
+
+import 'package:cake_wallet/core/address_validator.dart';
+import 'package:cw_core/crypto_currency.dart';
+import 'package:cw_core/utils/print_verbose.dart';
+import 'package:cw_core/utils/proxy_wrapper.dart';
+
+class ZcashNamesRecord {
+  static final Uri _mainnetEndpoint = Uri.parse('https://main.zcashnames.com');
+
+  static final RegExp _nameRegExp = RegExp(r'^[A-Za-z0-9_-]{1,63}$');
+
+  static Future<String?> fetchZcashNamesAddress(String input) async {
+    final name = _extractName(input);
+    if (name == null) return null;
+
+    try {
+      final response = await ProxyWrapper().post(
+        clearnetUri: _mainnetEndpoint,
+        headers: const {'Content-Type': 'application/json'},
+        body: jsonEncode({
+          'jsonrpc': '2.0',
+          'id': 1,
+          'method': 'resolve',
+          'params': {'query': name},
+        }),
+      );
+
+      if (response.statusCode != 200) {
+        printV('ZcashNames: non-200 status ${response.statusCode} for $name');
+        return null;
+      }
+
+      final decoded = jsonDecode(response.body);
+      if (decoded is! Map<String, dynamic>) return null;
+      if (decoded['error'] != null) return null;
+
+      final result = decoded['result'];
+      if (result is! Map<String, dynamic>) return null;
+
+      final address = result['address'];
+      if (address is! String || address.isEmpty) return null;
+
+      if (!_isValidZcashAddress(address)) {
+        printV('ZcashNames: returned address failed validation for $name');
+        return null;
+      }
+      return address;
+    } catch (e) {
+      printV('ZcashNames: lookup failed for $name: $e');
+      return null;
+    }
+  }
+
+  static String? _extractName(String input) {
+    final lower = input.toLowerCase().trim();
+    String? raw;
+    if (lower.endsWith('.zcash')) {
+      raw = lower.substring(0, lower.length - '.zcash'.length);
+    } else if (lower.endsWith('.zec')) {
+      raw = lower.substring(0, lower.length - '.zec'.length);
+    }
+    if (raw == null || raw.isEmpty) return null;
+    if (!_nameRegExp.hasMatch(raw)) return null;
+    return raw;
+  }
+
+  static bool _isValidZcashAddress(String address) {
+    final pattern =
+        AddressValidator.getAddressFromStringPattern(CryptoCurrency.zec);
+    if (pattern == null) return false;
+    return RegExp('^(?:$pattern)\$').hasMatch(address);
+  }
+}

lib/exchange/provider/thorchain_exchange.provider.dart

@@ -256,28 +256,33 @@ class ThorChainExchangeProvider extends ExchangeProvider {
 
   static Future<Map<String, String>?>? lookupAddressByName(String name) async {
     final uri = Uri.https(_baseURL, '$_nameLookUpPath$name');
-    final response = await ProxyWrapper().get(clearnetUri: uri);
-    
-    if (response.statusCode != 200) {
-      return null;
-    }
-
-    final body = json.decode(response.body) as Map<String, dynamic>;
-    final entries = body['entries'] as List<dynamic>?;
-
-    if (entries == null || entries.isEmpty) {
-      return null;
-    }
-
-    Map<String, String> chainToAddressMap = {};
-
-    for (final entry in entries) {
-      final chain = entry['chain'] as String;
-      final address = entry['address'] as String;
-      chainToAddressMap[chain] = address;
-    }
-
-    return chainToAddressMap;
+    try {
+  final response = await ProxyWrapper().get(clearnetUri: uri);
+  
+  if (response.statusCode != 200) {
+    return null;
+  }
+  
+  final body = json.decode(response.body) as Map<String, dynamic>;
+  final entries = body['entries'] as List<dynamic>?;
+  
+  if (entries == null || entries.isEmpty) {
+    return null;
+  }
+  
+  Map<String, String> chainToAddressMap = {};
+  
+  for (final entry in entries) {
+    final chain = entry['chain'] as String;
+    final address = entry['address'] as String;
+    chainToAddressMap[chain] = address;
+  }
+  
+  return chainToAddressMap;
+}  catch (e) {
+  printV(e.toString());
+  return null;
+}
   }
 
   Future<Map<String, dynamic>> _getSwapQuote(Map<String, String> params) async {

lib/src/screens/send/widgets/extract_address_from_parsed.dart

@@ -78,6 +78,11 @@ Future<String> extractAddressFromParsed(
       content = S.of(context).extracted_address_content('${parsedAddress.name} (Zcash.me)');
       address = parsedAddress.addresses.first;
       break;
+    case ParseFrom.zcashName:
+      title = S.of(context).address_detected;
+      content = S.of(context).extracted_address_content('${parsedAddress.name} (Zcash Names)');
+      address = parsedAddress.addresses.first;
+      break;
     case ParseFrom.bip353:
       title = S.of(context).address_detected;
       content = S.of(context).extracted_address_content('${parsedAddress.name} (BIP-353)');

lib/src/screens/settings/domain_lookups_page.dart

@@ -45,6 +45,11 @@ class DomainLookupsPage extends BasePage {
                   title: 'Ethereum Name Service',
                   value: _connectionsSyncViewModel.looksUpENS,
                   onValueChange: (_, bool value) => _connectionsSyncViewModel.setLookupsENS(value)),
+              SettingsSwitcherCell(
+                  title: 'Zcash Names',
+                  value: _connectionsSyncViewModel.lookupsZcashNames,
+                  onValueChange: (_, bool value) =>
+                      _connectionsSyncViewModel.setLookupsZcashNames(value)),
               SettingsSwitcherCell(
                   title: '.well-known',
                   value: _connectionsSyncViewModel.looksUpWellKnown,

lib/store/settings_store.dart

@@ -131,6 +131,7 @@ abstract class SettingsStoreBase with Store {
       required this.lookupsUnstoppableDomains,
       required this.lookupsOpenAlias,
       required this.lookupsENS,
+      required this.lookupsZcashNames,
       required this.lookupsWellKnown,
       required this.usePayjoin,
       required this.showPayjoinCard,
@@ -561,6 +562,11 @@ abstract class SettingsStoreBase with Store {
     reaction((_) => lookupsENS,
         (bool looksUpENS) => _sharedPreferences.setBool(PreferencesKey.lookupsENS, looksUpENS));
 
+    reaction(
+        (_) => lookupsZcashNames,
+        (bool looksUpZcashNames) => _sharedPreferences.setBool(
+            PreferencesKey.lookupsZcashNames, looksUpZcashNames));
+
     reaction(
         (_) => lookupsWellKnown,
         (bool looksUpWellKnown) =>
@@ -953,6 +959,9 @@ abstract class SettingsStoreBase with Store {
   @observable
   bool lookupsENS;
 
+  @observable
+  bool lookupsZcashNames;
+
   @observable
   bool lookupsWellKnown;
 
@@ -1260,6 +1269,8 @@ abstract class SettingsStoreBase with Store {
         sharedPreferences.getBool(PreferencesKey.lookupsUnstoppableDomains) ?? true;
     final lookupsOpenAlias = sharedPreferences.getBool(PreferencesKey.lookupsOpenAlias) ?? true;
     final lookupsENS = sharedPreferences.getBool(PreferencesKey.lookupsENS) ?? true;
+    final lookupsZcashNames =
+        sharedPreferences.getBool(PreferencesKey.lookupsZcashNames) ?? true;
     final lookupsWellKnown = sharedPreferences.getBool(PreferencesKey.lookupsWellKnown) ?? true;
     final usePayjoin = sharedPreferences.getBool(PreferencesKey.usePayjoin) ?? false;
     final showPayjoinCard = sharedPreferences.getBool(PreferencesKey.showPayjoinCard) ?? true;
@@ -1625,6 +1636,7 @@ abstract class SettingsStoreBase with Store {
       lookupsUnstoppableDomains: lookupsUnstoppableDomains,
       lookupsOpenAlias: lookupsOpenAlias,
       lookupsENS: lookupsENS,
+      lookupsZcashNames: lookupsZcashNames,
       lookupsWellKnown: lookupsWellKnown,
       usePayjoin: usePayjoin,
       showPayjoinCard: showPayjoinCard,
@@ -1851,6 +1863,8 @@ abstract class SettingsStoreBase with Store {
         sharedPreferences.getBool(PreferencesKey.lookupsUnstoppableDomains) ?? true;
     lookupsOpenAlias = sharedPreferences.getBool(PreferencesKey.lookupsOpenAlias) ?? true;
     lookupsENS = sharedPreferences.getBool(PreferencesKey.lookupsENS) ?? true;
+    lookupsZcashNames =
+        sharedPreferences.getBool(PreferencesKey.lookupsZcashNames) ?? true;
     lookupsWellKnown = sharedPreferences.getBool(PreferencesKey.lookupsWellKnown) ?? true;
     customBitcoinFeeRate = sharedPreferences.getInt(PreferencesKey.customBitcoinFeeRate) ?? 1;
     silentPaymentsCardDisplay =

lib/view_model/settings/connection_sync_view_model.dart

@@ -6,7 +6,6 @@ import 'package:cake_wallet/evm/evm.dart';
 import 'package:cake_wallet/generated/i18n.dart';
 import 'package:cake_wallet/reactions/wallet_connect.dart';
 import 'package:cake_wallet/src/widgets/alert_with_one_action.dart';
-import 'package:cake_wallet/store/app_store.dart';
 import 'package:cake_wallet/store/settings_store.dart';
 import 'package:cake_wallet/tron/tron.dart';
 import 'package:cake_wallet/utils/show_pop_up.dart';
@@ -50,6 +49,9 @@ abstract class ConnectionSyncViewModelBase with Store {
   @computed
   bool get looksUpENS => _settingsStore.lookupsENS;
 
+  @computed
+  bool get lookupsZcashNames => _settingsStore.lookupsZcashNames;
+
   @computed
   bool get looksUpWellKnown => _settingsStore.lookupsWellKnown;
 
@@ -129,6 +131,9 @@ abstract class ConnectionSyncViewModelBase with Store {
   @action
   void setLookupsENS(bool value) => _settingsStore.lookupsENS = value;
 
+  @action
+  void setLookupsZcashNames(bool value) => _settingsStore.lookupsZcashNames = value;
+
   @action
   void setLookupsWellKnown(bool value) => _settingsStore.lookupsWellKnown = value;
 

lib/view_model/settings/privacy_settings_view_model.dart

@@ -99,6 +99,9 @@ abstract class PrivacySettingsViewModelBase with Store {
   @computed
   bool get looksUpENS => _settingsStore.lookupsENS;
 
+  @computed
+  bool get lookupsZcashNames => _settingsStore.lookupsZcashNames;
+
   @computed
   bool get looksUpWellKnown => _settingsStore.lookupsWellKnown;