add Disable fiat mode

lib/view_model/dashboard/balance_view_model.dart

@@ -71,6 +71,9 @@ abstract class BalanceViewModelBase with Store {
   @computed
   BalanceDisplayMode get savedDisplayMode => settingsStore.balanceDisplayMode;
 
+  @computed
+  bool get disableFiat => settingsStore.shouldDisableFiat;
+
   @computed
   String get asset {
     final typeFormatted = walletTypeToString(appStore.wallet!.type);
@@ -180,8 +183,8 @@ abstract class BalanceViewModelBase with Store {
         return MapEntry(key, BalanceRecord(
           availableBalance: '---',
           additionalBalance: '---',
-          fiatAdditionalBalance: '---',
-          fiatAvailableBalance: '---',
+          fiatAdditionalBalance: disableFiat ? '' : '---',
+          fiatAvailableBalance: disableFiat ? '' : '---',
           asset: key,
           formattedAssetTitle: _formatterAsset(key)));
       }
@@ -192,17 +195,17 @@ abstract class BalanceViewModelBase with Store {
       //   throw Exception('Price is null for: $key');
       // }
 
-      final additionalFiatBalance = fiatCurrency.toString()
-        + ' ' 
+      final additionalFiatBalance = disableFiat ? '' : (fiatCurrency.toString()
+        + ' '
         + _getFiatBalance(
             price: price,
-            cryptoAmount: value.formattedAdditionalBalance);
+            cryptoAmount: value.formattedAdditionalBalance));
 
-      final availableFiatBalance = fiatCurrency.toString()
-        + ' ' 
+      final availableFiatBalance = disableFiat ? '' : (fiatCurrency.toString()
+        + ' '
         + _getFiatBalance(
             price: price,
-            cryptoAmount: value.formattedAvailableBalance);
+            cryptoAmount: value.formattedAvailableBalance));
 
       return MapEntry(key, BalanceRecord(
         availableBalance: value.formattedAvailableBalance,

lib/view_model/settings/settings_view_model.dart

@@ -61,7 +61,6 @@ abstract class SettingsViewModelBase with Store {
       : itemHeaders = {},
         _walletType = wallet.type,
         _biometricAuth = BiometricAuth(),
-        sections = <List<SettingsListItem>>[],
         currentVersion = '' {
     PackageInfo.fromPlatform().then(
         (PackageInfo packageInfo) => currentVersion = packageInfo.version);
@@ -98,7 +97,7 @@ abstract class SettingsViewModelBase with Store {
     //}
 
 
-    sections = [
+    getSections = () => [
       [
         SwitcherListItem(
             title: S.current.settings_display_balance,
@@ -111,7 +110,7 @@ abstract class SettingsViewModelBase with Store {
               }
             },
         ),
-        if (!isHaven)
+        if (!isHaven && !shouldDisableFiat)
           PickerListItem(
               title: S.current.settings_currency,
               searchHintText: S.current.search_currency,
@@ -183,6 +182,11 @@ abstract class SettingsViewModelBase with Store {
               return LanguageService.list[code]?.toLowerCase().contains(searchText) ?? false;
             },
         ),
+        SwitcherListItem(
+            title: 'S.current.disable_fiat',
+            value: () => shouldDisableFiat,
+            onValueChange: (_, bool value) =>
+                setShouldDisableFiat(value)),
         SwitcherListItem(
             title: S.current.settings_allow_biometrical_authentication,
             value: () => allowBiometricalAuthentication,
@@ -208,6 +212,7 @@ abstract class SettingsViewModelBase with Store {
                 setAllowBiometricalAuthentication(value);
               }
             }),
+
         ChoicesListItem(
           title: S.current.color_theme,
           items: ThemeList.all,
@@ -275,6 +280,10 @@ abstract class SettingsViewModelBase with Store {
   bool get shouldSaveRecipientAddress =>
       _settingsStore.shouldSaveRecipientAddress;
 
+  @computed
+  bool get shouldDisableFiat =>
+      _settingsStore.shouldDisableFiat;
+
   @computed
   bool get allowBiometricalAuthentication =>
       _settingsStore.allowBiometricalAuthentication;
@@ -285,7 +294,7 @@ abstract class SettingsViewModelBase with Store {
   bool get isBitcoinBuyEnabled => _settingsStore.isBitcoinBuyEnabled;
 
   final Map<String, String> itemHeaders;
-  List<List<SettingsListItem>> sections;
+  late List<List<SettingsListItem>> Function() getSections;
   final SettingsStore _settingsStore;
   final YatStore _yatStore;
   final WalletType _walletType;
@@ -303,6 +312,10 @@ abstract class SettingsViewModelBase with Store {
   void setShouldSaveRecipientAddress(bool value) =>
       _settingsStore.shouldSaveRecipientAddress = value;
 
+  @action
+  void setShouldDisableFiat(bool value) =>
+      _settingsStore.shouldDisableFiat = value;
+
   @action
   void setAllowBiometricalAuthentication(bool value) =>
       _settingsStore.allowBiometricalAuthentication = value;