Merge remote-tracking branch 'origin/send-wallet-core' into brightness-fix

### lib/consts.dart
@@ -3,15 +3,4 @@ const String torDataDirName = 'tor';
 const int txDirectionIncoming = 0;
 const int txDirectionOutgoing = 1;
 const int moneroDecimals = 12;
-const supportedFiatCurrencies = ['USD', 'EUR', 'CAD', 'AUD', 'GBP', 'CHF', 'JPY'];
-const indirectPairCurrencies = ['CAD', 'AUD', 'GBP', 'CHF', 'JPY'];
-const currencySymbols = {
-  'USD': '\$',
-  'EUR': '€',
-  'CAD': 'C\$',
-  'AUD': 'A\$',
-  'GBP': '£',
-  'CHF': 'Fr',
-  'JPY': '¥',
-};
 const walletPasswordStorageKey = 'walletPassword';

### lib/l10n/app_en.arb
@@ -315,6 +315,7 @@
   "sendPickContactTitle": "Send to a contact",
   "sendAvailableSuffix": "available",
   "sendIrreversibleNote": "Monero transactions are irreversible. Double-check the address and amount before sending.",
+  "sendSwitchUnit": "Switch amount unit",
   "sendFailedToGetFeesError": "Failed to get fees.",
   "torSettingsTitle": "Tor Settings",
   "torSettingsModeBuiltIn": "Built-in Tor",

### lib/l10n/app_localizations.dart
@@ -1731,6 +1731,12 @@ abstract class AppLocalizations {
   /// **'Monero transactions are irreversible. Double-check the address and amount before sending.'**
   String get sendIrreversibleNote;
 
+  /// No description provided for @sendSwitchUnit.
+  ///
+  /// In en, this message translates to:
+  /// **'Switch amount unit'**
+  String get sendSwitchUnit;
+
   /// No description provided for @sendFailedToGetFeesError.
   ///
   /// In en, this message translates to:

### lib/l10n/app_localizations_en.dart
@@ -882,6 +882,9 @@ class AppLocalizationsEn extends AppLocalizations {
   String get sendIrreversibleNote =>
       'Monero transactions are irreversible. Double-check the address and amount before sending.';
 
+  @override
+  String get sendSwitchUnit => 'Switch amount unit';
+
   @override
   String get sendFailedToGetFeesError => 'Failed to get fees.';
 

### lib/l10n/app_localizations_pt.dart
@@ -883,6 +883,9 @@ class AppLocalizationsPt extends AppLocalizations {
   String get sendIrreversibleNote =>
       'Transações Monero são irreversíveis. Confira o endereço e o valor antes de enviar.';
 
+  @override
+  String get sendSwitchUnit => 'Alternar unidade do valor';
+
   @override
   String get sendFailedToGetFeesError => 'Não foi possível carregar taxas.';
 

### lib/l10n/app_pt.arb
@@ -315,6 +315,7 @@
   "sendPickContactTitle": "Enviar para um contato",
   "sendAvailableSuffix": "disponível",
   "sendIrreversibleNote": "Transações Monero são irreversíveis. Confira o endereço e o valor antes de enviar.",
+  "sendSwitchUnit": "Alternar unidade do valor",
   "sendFailedToGetFeesError": "Não foi possível carregar taxas.",
   "torSettingsTitle": "Configurações do Tor",
   "torSettingsModeBuiltIn": "Tor Integrado",

### lib/models/fiat_rate_model.dart
@@ -3,4 +3,4 @@
 // sites are unchanged; the app supplies the Tor proxy via FiatRates.install and
 // attaches the WalletManager via attachFiatWalletManager in wallet_core_glue.dart.
 // The fiatAutoDisabledByTor auto-disable/restore stays app-side (tor_settings_form).
-export 'package:wallet_fiat/wallet_fiat.dart' show FiatRateModel, FiatApiMode;
+export 'package:wallet_fiat/wallet_fiat.dart' show FiatRateModel, FiatApiMode, FiatCurrency, FiatQuote;

### lib/screens/desktop/fiat_setup_view.dart
@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_svg/flutter_svg.dart';
+import 'package:wallet_fiat/wallet_fiat.dart';
 
 import 'package:skylight_wallet/widgets/ui/ui.dart';
 
@@ -9,7 +10,7 @@ class DesktopFiatSetupView extends StatelessWidget {
   final FiatSetupLabels labels;
   final String noteRatesOnly;
   final String noteTor;
-  final List<FiatCurrencyOption> currencies;
+  final List<FiatCurrency> currencies;
   final int modeIndex;
   final String currency;
   final bool offerTorOnly;
@@ -23,7 +24,7 @@ class DesktopFiatSetupView extends StatelessWidget {
     required this.labels,
     required this.noteRatesOnly,
     required this.noteTor,
-    required this.currencies,
+    this.currencies = FiatCurrency.all,
     required this.modeIndex,
     required this.currency,
     required this.offerTorOnly,

### lib/screens/fiat_api_setup_screen.dart
@@ -1,6 +1,5 @@
 import 'package:flutter/material.dart';
 
-import 'package:skylight_wallet/consts.dart';
 import 'package:skylight_wallet/l10n/app_localizations.dart';
 import 'package:skylight_wallet/models/fiat_rate_model.dart';
 import 'package:skylight_wallet/screens/desktop/fiat_setup_view.dart';
@@ -56,17 +55,12 @@ class _FiatApiSetupScreenState extends State<FiatApiSetupScreen> {
       currencyLabel: i18n.fiatApiSettingsDisplayCurrencyLabel,
       continueText: i18n.lwsSetupContinueButton,
     );
-    final currencies = [
-      for (final code in supportedFiatCurrencies)
-        FiatCurrencyOption(code: code, symbol: currencySymbols[code] ?? ''),
-    ];
 
     if (isDesktop) {
       return DesktopFiatSetupView(
         labels: labels,
         noteRatesOnly: i18n.onboardingPriceNoteRatesOnly,
         noteTor: i18n.onboardingPriceNoteTor,
-        currencies: currencies,
         modeIndex: _fiatMode.index,
         currency: _fiatCurrency,
         offerTorOnly: !_globalTorDisabled,
@@ -79,7 +73,6 @@ class _FiatApiSetupScreenState extends State<FiatApiSetupScreen> {
 
     return FiatSetupView(
       labels: labels,
-      currencies: currencies,
       modeIndex: _fiatMode.index,
       currency: _fiatCurrency,
       offerTorOnly: !_globalTorDisabled,

### lib/screens/send.dart
@@ -7,7 +7,6 @@ import 'package:provider/provider.dart';
 import 'package:wallet_domain/wallet_domain.dart' show baseUnitsToDecimalString, decimalToBaseUnits;
 import 'package:wallet_infra/wallet_infra.dart' show StoreReview;
 
-import 'package:skylight_wallet/consts.dart' as consts;
 import 'package:skylight_wallet/l10n/app_localizations.dart';
 import 'package:skylight_wallet/models/app_wallet.dart';
 import 'package:skylight_wallet/models/contact_model.dart';
@@ -64,7 +63,9 @@ class _SendScreenState extends State<SendScreen> {
   bool _isLoading = false;
   bool _isLoadingFees = false;
   final _destinationAddressController = TextEditingController(text: '');
-  final _amountController = TextEditingController(text: '');
+  /// The amount, typed in XMR or fiat. Read what is spent from
+  /// `_amount.baseUnits` / `_amount.coinText`, never from its field.
+  late final AmountEntryController _amount;
   bool _isSweepAll = false;
   Contact? _selectedContact;
   List<int?>? _fees; // estimated fee (piconero) per priority; null = estimate failed
@@ -89,9 +90,9 @@ class _SendScreenState extends State<SendScreen> {
   @override
   void dispose() {
     _destinationAddressController.removeListener(_onAddressChanged);
-    _amountController.removeListener(_onAmountChanged);
+    _amount.removeListener(_onAmountChanged);
     _destinationAddressController.dispose();
-    _amountController.dispose();
+    _amount.dispose();
     super.dispose();
   }
 
@@ -105,9 +106,14 @@ class _SendScreenState extends State<SendScreen> {
     if (_didInit) return;
     _didInit = true;
 
+    _amount = AmountEntryController(
+      quotes: Provider.of<FiatRateModel>(context, listen: false),
+      coinSymbol: 'XMR',
+      coinDecimals: _xmrDecimals,
+    );
     _loadFormFromArgs();
     _destinationAddressController.addListener(_onAddressChanged);
-    _amountController.addListener(_onAmountChanged);
+    _amount.addListener(_onAmountChanged);
     // Validate any prefilled values (contact/QR args) so the button reflects them.
     _revalidate();
   }
@@ -117,7 +123,8 @@ class _SendScreenState extends State<SendScreen> {
 
     if (args != null) {
       _destinationAddressController.text = args.destinationAddress;
-      _amountController.text = args.amount ?? '';
+      final amount = args.amount;
+      if (amount != null && amount.isNotEmpty) _amount.setCoinText(amount);
       // Same field the in-send picker sets, so the contact card renders here too.
       _selectedContact = args.contact;
     }
@@ -165,7 +172,8 @@ class _SendScreenState extends State<SendScreen> {
 
     _destinationAddressController.text = address;
     if (amount != null) {
-      _amountController.text = _asExactAmount(amount);
+      // A payment request is denominated in XMR, so entry switches to XMR.
+      _amount.setCoinText(_asExactAmount(amount));
     }
   }
 
@@ -290,10 +298,9 @@ class _SendScreenState extends State<SendScreen> {
   }
 
   Future<bool> _validateForm({bool setErrors = true}) async {
-    final amount = double.tryParse(_amountController.text) ?? 0;
     final unresolvedDestinationAddress = _destinationAddressController.text;
 
-    if (amount == 0) {
+    if (_amount.baseUnits == BigInt.zero) {
       return false;
     }
 
@@ -320,7 +327,7 @@ class _SendScreenState extends State<SendScreen> {
       return false;
     }
 
-    if (_amountUnits() > (wallet.unlockedBalanceBaseUnits ?? BigInt.zero)) {
+    if (_amount.baseUnits > (wallet.unlockedBalanceBaseUnits ?? BigInt.zero)) {
       if (setErrors) {
         setState(() {
           _amountError = i18n.sendInsufficientBalanceError;
@@ -333,7 +340,7 @@ class _SendScreenState extends State<SendScreen> {
   }
 
   Future<void> _calculateFees() async {
-    final feeFetchKey = '${_destinationAddressController.text}-${_amountController.text}';
+    final feeFetchKey = '${_destinationAddressController.text}-${_amount.coinText}';
 
     if (feeFetchKey == _lastFeeFetchKey) {
       return;
@@ -354,7 +361,7 @@ class _SendScreenState extends State<SendScreen> {
     });
 
     final destinationAddress = await _resolveDestinationAddress();
-    final amountText = _amountController.text;
+    final amountText = _amount.coinText;
 
     try {
       // Estimate the fee per priority natively (no full tx build).
@@ -449,7 +456,7 @@ class _SendScreenState extends State<SendScreen> {
       // screen are estimates, not tx objects, so always construct here).
       final tx = await wallet.createTx(
         destinationAddress,
-        _amountController.text,
+        _amount.coinText,
         _isSweepAll,
         priority: _selectedPriority + 1,
       );
@@ -470,7 +477,7 @@ class _SendScreenState extends State<SendScreen> {
       if (error.toString().contains('Unlocked funds too low')) {
         // Display-only: picks which of two error messages to show, so the
         // imprecision of a double cannot reach an amount anyone spends.
-        final approxAmount = double.tryParse(_amountController.text) ?? 0;
+        final approxAmount = double.tryParse(_amount.coinText) ?? 0;
         if (wallet.unlockedBalance! > approxAmount) {
           setState(() {
             _amountError = i18n.sendInsufficientBalanceToCoverFeeError;
@@ -502,11 +509,9 @@ class _SendScreenState extends State<SendScreen> {
     String? destinationOpenAliasName,
   }) async {
     final i18n = AppLocalizations.of(context)!;
-    final fiatRate = Provider.of<FiatRateModel>(context, listen: false);
-    final fiatSymbol = fiatRate.fiatCode == 'EUR' ? '€' : '\$';
-    final xmrRate = fiatRate.rateFor('XMR');
-    final amountFiat = xmrRate is double ? tx.amount * xmrRate : null;
-    final feeFiat = xmrRate is double ? tx.fee * xmrRate : null;
+    final quote = Provider.of<FiatRateModel>(context, listen: false).quoteFor('XMR');
+    final amountFiat = quote != null ? tx.amount * quote.rate : null;
+    final feeFiat = quote != null ? tx.fee * quote.rate : null;
 
     // Monero fee is same-currency, so compare directly. Warn when it's ≥10% of
     // the amount (mirrors Spice's confirm-send high-fee guard).
@@ -526,9 +531,9 @@ class _SendScreenState extends State<SendScreen> {
       ),
       coinSymbol: 'XMR',
       amountText: '${tx.amount.toStringAsFixed(12)} XMR',
-      amountFiat: amountFiat != null ? formatFiat(amountFiat, fiatSymbol) : null,
+      amountFiat: amountFiat != null ? formatFiat(amountFiat, quote!.currency) : null,
       feeText: '${tx.fee.toStringAsFixed(12)} XMR',
-      feeFiat: feeFiat != null ? formatFiat(feeFiat, fiatSymbol) : null,
+      feeFiat: feeFiat != null ? formatFiat(feeFiat, quote!.currency) : null,
       address: destinationAddress,
       openAlias: destinationOpenAlias,
       openAliasName: destinationOpenAliasName,
@@ -582,7 +587,11 @@ class _SendScreenState extends State<SendScreen> {
     // intact. Sweep-all normally makes the amount moot, but editing the field
     // clears that flag and the number becomes the real amount.
     final units = wallet.unlockedBalanceBaseUnits;
-    _amountController.text = units == null ? '' : baseUnitsToDecimalString(units, _xmrDecimals);
+    if (units == null) {
+      _amount.clear();
+    } else {
+      _amount.setMax(units);
+    }
 
     setState(() {
       _isSweepAll = true;
@@ -611,20 +620,11 @@ class _SendScreenState extends State<SendScreen> {
     await _revalidate();
   }
 
-  /// The typed amount in piconero, or zero when the field is not a number.
-  BigInt _amountUnits() {
-    try {
-      return decimalToBaseUnits(_amountController.text, _xmrDecimals);
-    } on FormatException {
-      return BigInt.zero;
-    }
-  }
-
   Future<void> _onAmountChanged() async {
     final wallet = appWalletOf(context);
     // Base units for the same reason as in `_validateForm`: `==` between two
     // differently-rounded doubles decided whether this is a sweep.
-    final isFullBalance = _amountUnits() == wallet.unlockedBalanceBaseUnits;
+    final isFullBalance = _amount.baseUnits == wallet.unlockedBalanceBaseUnits;
 
     if (isFullBalance && !_isSweepAll) {
       setState(() {
@@ -648,19 +648,14 @@ class _SendScreenState extends State<SendScreen> {
   Widget build(BuildContext context) {
     final i18n = AppLocalizations.of(context)!;
     final wallet = appWalletOf(context, listen: true);
-    final fiatRate = context.watch<FiatRateModel>();
-    final fiatSymbol = consts.currencySymbols[fiatRate.fiatCode] ?? '\$';
-    final coinRate = fiatRate.rateFor('XMR');
-
-    final amount = double.tryParse(_amountController.text) ?? 0;
-    final amountFiat = coinRate != null ? amount * coinRate : 0.0;
+    final quote = context.watch<FiatRateModel>().quoteFor('XMR');
     final available = wallet.unlockedBalance ?? 0;
     final xmr = xmrWallet(context);
 
     if (isDesktop) {
       return DesktopShell(
         active: DesktopNav.home,
-        child: _desktopBody(context, i18n, fiatSymbol, coinRate, amountFiat, available),
+        child: _desktopBody(context, i18n, quote, available),
       );
     }
 
@@ -679,6 +674,7 @@ class _SendScreenState extends State<SendScreen> {
         maxButton: i18n.sendMaxButton,
         addressHint: i18n.address,
         priorityLabels: [i18n.sendPriorityLow, i18n.sendPriorityNormal, i18n.sendPriorityHigh],
+        switchUnit: i18n.sendSwitchUnit,
       ),
       onBack: () => Navigator.of(context).pop(),
       addressController: _destinationAddressController,
@@ -692,19 +688,17 @@ class _SendScreenState extends State<SendScreen> {
           ? _shortenMiddle(_destinationAddressController.text, head: 8, tail: 10)
           : null,
       onClearContact: _clearSelectedContact,
-      amountController: _amountController,
+      amount: _amount,
       amountError: _amountError,
       onMax: _setBalanceAsSendAmount,
-      coinSymbol: 'XMR',
-      amountFiatText: '≈ ${formatFiat(amountFiat, fiatSymbol)}',
       availableText: '${_amountText(available)} ${i18n.sendAvailableSuffix}',
       availableLeading: xmr != null
           ? CoinMark(coinSymbol: xmr.coinSymbol, iconAsset: xmr.iconAsset, size: 16)
           : const SizedBox(width: 16, height: 16),
       onAvailableTap: _setBalanceAsSendAmount,
       selectedPriority: _selectedPriority,
       onSelectPriority: _setPriority,
-      feeValue: _feeValue(fiatSymbol, coinRate),
+      feeValue: _feeValue(quote),
       onCancel: () => Navigator.pop(context),
       onSend: (_formValid && _openAliasResolving == 0 && !_isLoading) ? _send : null,
       sendLoading: _isLoading,
@@ -716,9 +710,7 @@ class _SendScreenState extends State<SendScreen> {
   Widget _desktopBody(
     BuildContext context,
     AppLocalizations i18n,
-    String fiatSymbol,
-    double? coinRate,
-    double amountFiat,
+    FiatQuote? quote,
     double available,
   ) {
     final canSend = _formValid && _openAliasResolving == 0 && !_isLoading;
@@ -729,17 +721,15 @@ class _SendScreenState extends State<SendScreen> {
         const SizedBox(height: 16),
         Text(i18n.sendTitle, style: desktopTitleStyle),
         const SizedBox(height: 24),
-        _sendForm(context, i18n, fiatSymbol, coinRate, amountFiat, available, canSend),
+        _sendForm(context, i18n, quote, available, canSend),
       ],
     );
   }
 
   Widget _sendForm(
     BuildContext context,
     AppLocalizations i18n,
-    String fiatSymbol,
-    double? coinRate,
-    double amountFiat,
+    FiatQuote? quote,
     double available,
     bool canSend,
   ) {
@@ -749,7 +739,7 @@ class _SendScreenState extends State<SendScreen> {
         _dField(i18n.sendToLabel, _dToCard(i18n)),
         if (_destinationAddressError.isNotEmpty) _dError(_destinationAddressError),
         const SizedBox(height: 16),
-        _dField(i18n.amount, _dAmountCard(i18n, fiatSymbol, amountFiat, available)),
+        _dField(i18n.amount, _dAmountCard(i18n, quote, available)),
         if (_amountError.isNotEmpty) _dError(_amountError),
       ],
     );
@@ -778,7 +768,7 @@ class _SendScreenState extends State<SendScreen> {
                       color: BrandColors.inkMuted,
                     ),
                   ),
-                  _feeValue(fiatSymbol, coinRate),
+                  _feeValue(quote),
                 ],
               ),
             ],
@@ -927,8 +917,7 @@ class _SendScreenState extends State<SendScreen> {
 
   Widget _dAmountCard(
     AppLocalizations i18n,
-    String fiatSymbol,
-    double amountFiat,
+    FiatQuote? quote,
     double available,
   ) {
     return _dCard(
@@ -939,7 +928,7 @@ class _SendScreenState extends State<SendScreen> {
             children: [
               Expanded(
                 child: TextField(
-                  controller: _amountController,
+                  controller: _amount.field,
                   keyboardType: const TextInputType.numberWithOptions(decimal: true),
                   style: TextStyle(
                     fontFamily: 'Ubuntu Mono',
@@ -999,14 +988,17 @@ class _SendScreenState extends State<SendScreen> {
           Row(
             mainAxisAlignment: MainAxisAlignment.spaceBetween,
             children: [
-              Text(
-                '≈ ${formatFiat(amountFiat, fiatSymbol)}',
-                style: TextStyle(
-                  fontFamily: 'Ubuntu Mono',
-                  fontSize: 12.5,
-                  color: BrandColors.inkMuted,
-                ),
-              ),
+              if (quote != null)
+                Text(
+                  '≈ ${formatFiat((double.tryParse(_amount.coinText) ?? 0) * quote.rate, quote.currency)}',
+                  style: TextStyle(
+                    fontFamily: 'Ubuntu Mono',
+                    fontSize: 12.5,
+                    color: BrandColors.inkMuted,
+                  ),
+                )
+              else
+                const SizedBox.shrink(),
               Text(
                 '${_amountText(available)} ${i18n.sendAvailableSuffix}',
                 style: TextStyle(
@@ -1052,7 +1044,7 @@ class _SendScreenState extends State<SendScreen> {
     ),
   );
 
-  Widget _feeValue(String fiatSymbol, double? coinRate) {
+  Widget _feeValue(FiatQuote? quote) {
     final feePiconero = (_fees != null && _fees!.length > _selectedPriority)
         ? _fees![_selectedPriority]
         : null;
@@ -1070,7 +1062,7 @@ class _SendScreenState extends State<SendScreen> {
       );
     }
     final fee = doubleAmountFromInt(feePiconero);
-    final feeFiat = coinRate != null ? ' · ${formatFiat(fee * coinRate, fiatSymbol)}' : '';
+    final feeFiat = quote != null ? ' · ${formatFiat(fee * quote.rate, quote.currency)}' : '';
     return Row(
       mainAxisSize: MainAxisSize.min,
       children: [

### lib/screens/wallet_home.dart
@@ -6,7 +6,6 @@ import 'package:intl/intl.dart';
 import 'package:provider/provider.dart';
 import 'package:skeletonizer/skeletonizer.dart';
 
-import 'package:skylight_wallet/consts.dart' as consts;
 import 'package:skylight_wallet/l10n/app_localizations.dart';
 import 'package:skylight_wallet/models/app_wallet.dart';
 import 'package:skylight_wallet/models/fiat_rate_model.dart';
@@ -45,7 +44,6 @@ typedef _HomeValues = ({
   double unlockedBalance,
   double? unlockedBalanceFiat,
   double lockedBalance,
-  String fiatSymbol,
   StatusIconStatus status,
   bool disconnected,
 });
@@ -56,7 +54,6 @@ _HomeValues _deriveHome(AppWallet wallet, FiatRateModel fiatRate) {
       ? wallet.unlockedBalance! * fiatRate.rateFor('XMR')!
       : null;
   final lockedBalance = (wallet.totalBalance ?? 0) - (wallet.unlockedBalance ?? 0);
-  final fiatSymbol = consts.currencySymbols[fiatRate.fiatCode] ?? '\$';
 
   var status = StatusIconStatus.fail;
   if (wallet.isFullySynced) {
@@ -73,7 +70,6 @@ _HomeValues _deriveHome(AppWallet wallet, FiatRateModel fiatRate) {
     unlockedBalance: unlockedBalance,
     unlockedBalanceFiat: unlockedBalanceFiat,
     lockedBalance: lockedBalance,
-    fiatSymbol: fiatSymbol,
     status: status,
     disconnected: wallet.torRequirementBroken || status == StatusIconStatus.fail,
   );
@@ -156,7 +152,6 @@ class _WalletHomeScreenState extends State<WalletHomeScreen> {
                               unlockedBalance: v.unlockedBalance,
                               unlockedBalanceFiat: v.unlockedBalanceFiat,
                               lockedBalance: v.lockedBalance,
-                              fiatSymbol: v.fiatSymbol,
                               fiatRate: fiatRate,
                               disconnected: v.disconnected,
                             ),
@@ -181,7 +176,6 @@ class _WalletHomeScreenState extends State<WalletHomeScreen> {
                         wallet: wallet,
                         i18n: i18n,
                         fiatRate: fiatRate,
-                        fiatSymbol: v.fiatSymbol,
                         onTapTx: _showTxDetails,
                       ),
                       const SliverToBoxAdapter(child: SizedBox(height: 24)),
@@ -231,7 +225,6 @@ class _BalanceHero extends StatelessWidget {
   final double unlockedBalance;
   final double? unlockedBalanceFiat;
   final double lockedBalance;
-  final String fiatSymbol;
   final FiatRateModel fiatRate;
   final bool disconnected;
 
@@ -240,7 +233,6 @@ class _BalanceHero extends StatelessWidget {
     required this.unlockedBalance,
     required this.unlockedBalanceFiat,
     required this.lockedBalance,
-    required this.fiatSymbol,
     required this.fiatRate,
     required this.disconnected,
   });
@@ -259,7 +251,7 @@ class _BalanceHero extends StatelessWidget {
           // Fiat leads when available; otherwise the coin amount is the hero,
           // with a skeleton while the rate is still loading.
           if (showFiat)
-            BalanceText.split(formatFiat(unlockedBalanceFiat!, fiatSymbol), style: _balanceStyle)
+            BalanceText.split(formatFiat(unlockedBalanceFiat!, fiatRate.fiatCurrency), style: _balanceStyle)
           else if (!fiatRate.isDisabled && !fiatRate.hasFailed)
             Skeletonizer(child: Text('0.0000', style: _balanceStyle))
           else
@@ -380,15 +372,13 @@ class _ActivitySliver extends StatelessWidget {
   final AppWallet wallet;
   final AppLocalizations i18n;
   final FiatRateModel fiatRate;
-  final String fiatSymbol;
   final double horizontalPadding;
   final void Function(TxDetails tx) onTapTx;
 
   const _ActivitySliver({
     required this.wallet,
     required this.i18n,
     required this.fiatRate,
-    required this.fiatSymbol,
     required this.onTapTx,
     this.horizontalPadding = 20,
   });
@@ -449,7 +439,6 @@ class _ActivitySliver extends StatelessWidget {
             showCoinIcon: false,
             labels: TxActivityLabels(received: i18n.coinHomeReceived, sent: i18n.coinHomeSent),
             fiatRate: fiatRate,
-            fiatSymbol: fiatSymbol,
             showDivider: next is TxDetails,
             onTap: () => onTapTx(tx),
           );
@@ -517,7 +506,7 @@ class DesktopHomeView extends StatelessWidget {
                         children: [
                           if (showFiat)
                             BalanceText.split(
-                              formatFiat(v.unlockedBalanceFiat!, v.fiatSymbol),
+                              formatFiat(v.unlockedBalanceFiat!, fiatRate.fiatCurrency),
                               style: _bigBalance,
                             )
                           else if (!fiatRate.isDisabled && !fiatRate.hasFailed)
@@ -576,7 +565,6 @@ class DesktopHomeView extends StatelessWidget {
           wallet: wallet,
           i18n: i18n,
           fiatRate: fiatRate,
-          fiatSymbol: v.fiatSymbol,
           horizontalPadding: 44,
           onTapTx: (tx) => showTxDetailsDialog(context, tx),
         ),

### lib/widgets/fiat_api_settings_form.dart
@@ -1,6 +1,5 @@
 import 'package:flutter/material.dart';
 
-import 'package:skylight_wallet/consts.dart';
 import 'package:skylight_wallet/l10n/app_localizations.dart';
 import 'package:skylight_wallet/models/fiat_rate_model.dart';
 import 'package:skylight_wallet/services/shared_preferences_service.dart';
@@ -79,10 +78,6 @@ class _FiatApiSettingsFormState extends State<FiatApiSettingsForm> {
           modeIndex: _mode.index,
           onModeChanged: (i) => setState(() => _mode = FiatApiMode.values[i]),
           currencyLabel: i18n.fiatApiSettingsDisplayCurrencyLabel,
-          currencies: [
-            for (final code in supportedFiatCurrencies)
-              FiatCurrencyOption(code: code, symbol: currencySymbols[code] ?? ''),
-          ],
           currency: _currency,
           onCurrencyChanged: (c) => setState(() => _currency = c),
         ),