CW-1130-deuro-fixes-improvements (#2392)

* feat: add support for Ethereum EIP-681 URIs in PaymentRequest and implement test coverage

* test: add unit test for EIP-681 URI handling with contract and no chainId [skip-ci]

* fix(CW-1114): rounding error for really large numbers

* fix: wrong decimals for eth fee display

* fix: limit fractional digits to a maximum of `decimals` in `format_fixed` function [skip-ci]

* test: add unit tests for `formatFixed` function

* refactor: replace custom balance formatting with `formatFixed` utility function

* refactor: improve dEuroViewModel formatting and computation logic

* refactor: extract and simplify interest action handlers in dEuro savings page

* fix: deuro add should show edit Add bottom sheet

* feat: block user from entering amount bigger than the max

* feat: use new tooltip bottomsheet for dEuro

* feat: add pull down to refresh dEuro savings

---------

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

cw_evm/lib/evm_erc20_balance.dart

@@ -1,6 +1,5 @@
 import 'dart:convert';
-import 'dart:math';
-import 'package:intl/intl.dart';
+import 'package:cw_core/format_fixed.dart';
 
 import 'package:cw_core/balance.dart';
 
@@ -12,17 +11,10 @@ class EVMChainERC20Balance extends Balance {
   final int exponent;
 
   @override
-  String get formattedAdditionalBalance => _balance();
+  String get formattedAdditionalBalance => formatFixed(balance, exponent, fractionalDigits: 12);
 
   @override
-  String get formattedAvailableBalance => _balance();
-
-  String _balance() {
-    NumberFormat formatter = NumberFormat('0.00##########', 'en_US');
-    double numBalance = (balance / BigInt.from(10).pow(exponent)).toDouble();
-    String formattedBalance = formatter.format(numBalance);
-    return formattedBalance;
-  }
+  String get formattedAvailableBalance => formatFixed(balance, exponent, fractionalDigits: 12);
 
   String toJSON() => json.encode({
         'balanceInWei': balance.toString(),

lib/src/screens/integrations/deuro/savings_page.dart

@@ -9,7 +9,9 @@ import 'package:cake_wallet/src/widgets/alert_with_one_action.dart';
 import 'package:cake_wallet/src/widgets/bottom_sheet/base_bottom_sheet_widget.dart';
 import 'package:cake_wallet/src/widgets/bottom_sheet/confirm_sending_bottom_sheet_widget.dart';
 import 'package:cake_wallet/src/widgets/bottom_sheet/info_bottom_sheet_widget.dart';
+import 'package:cake_wallet/src/widgets/bottom_sheet/tooltip_bottom_sheet.dart';
 import 'package:cake_wallet/src/widgets/gradient_background.dart';
+import 'package:cake_wallet/utils/responsive_layout_util.dart';
 import 'package:cake_wallet/utils/show_pop_up.dart';
 import 'package:cake_wallet/view_model/integrations/deuro_view_model.dart';
 import 'package:cake_wallet/view_model/send/send_view_model_state.dart';
@@ -37,86 +39,71 @@ class DEuroSavingsPage extends BasePage {
   @override
   String get title => S.current.deuro_savings;
 
-  Widget trailing(BuildContext context) => MergeSemantics(
-        child: SizedBox(
-          height: 37,
-          width: 37,
-          child: ButtonTheme(
-            minWidth: double.minPositive,
-            child: Semantics(
-              label: "Refresh",
-              child: TextButton(
-                style: TextButton.styleFrom(
-                  foregroundColor: Theme.of(context).colorScheme.onSurface,
-                  overlayColor: WidgetStateColor.resolveWith((states) => Colors.transparent),
-                ),
-                onPressed: _dEuroViewModel.reloadSavingsUserData,
-                child: Icon(
-                  Icons.refresh,
-                  color: pageIconColor(context),
-                  size: 20,
-                ),
-              ),
-            ),
-          ),
-        ),
-      );
-
   @override
   Widget body(BuildContext context) {
     WidgetsBinding.instance.addPostFrameCallback((_) => _setReactions(context, _dEuroViewModel));
 
-    return Container(
-      width: double.infinity,
-      child: Column(
-        children: <Widget>[
-          Observer(
-            builder: (_) => SavingsCard(
-              isDarkTheme: currentTheme.isDark,
-              interestRate: "${_dEuroViewModel.interestRate}%",
-              savingsBalance: _dEuroViewModel.savingsBalance,
-              fiatSavingsBalance: _dEuroViewModel.fiatSavingsBalance,
-              currency: CryptoCurrency.deuro,
-              fiatCurrency: _dEuroViewModel.isFiatDisabled ? null : _dEuroViewModel.fiat,
-              onAddSavingsPressed: () => _onSavingsAdd(context),
-              onRemoveSavingsPressed: () => _onSavingsRemove(context),
-              onApproveSavingsPressed: _dEuroViewModel.prepareApproval,
-              onTooltipPressed: () => _onSavingsTooltipPressed(context),
-              isEnabled: _dEuroViewModel.isEnabled,
-              isLoading: _dEuroViewModel.isLoading,
-            ),
-          ),
-          Observer(
-            builder: (_) => InterestCardWidget(
-              isDarkTheme: currentTheme.isDark,
-              title: S.of(context).deuro_savings_collect_interest,
-              fiatAccruedInterest: _dEuroViewModel.fiatAccruedInterest,
-              fiatCurrency: _dEuroViewModel.isFiatDisabled ? null : _dEuroViewModel.fiat,
-              accruedInterest: _dEuroViewModel.accruedInterest,
-              onCollectInterest: _dEuroViewModel.prepareCollectInterest,
-              onReinvestInterest: _dEuroViewModel.prepareReinvestInterest,
-              onTooltipPressed: () => _onInterestTooltipPressed(context),
-              isEnabled: _dEuroViewModel.isEnabled,
-            ),
-          ),
-          Spacer(),
-          SafeArea(
-            child: Padding(
-              padding: EdgeInsets.only(bottom: 30),
-              child: Row(
-                mainAxisAlignment: MainAxisAlignment.center,
-                children: [
-                  InfoChip(
-                    label: S.of(context).deuro_about_deuro,
-                    icon: CupertinoIcons.info,
-                    onPressed: () => _showWelcomeTooltip(context),
+    return RefreshIndicator(
+      displacement: responsiveLayoutUtil.screenHeight * 0.1,
+      onRefresh: _dEuroViewModel.reloadSavingsUserData,
+      child: CustomScrollView(
+        slivers: <Widget>[
+          SliverFillRemaining(
+            child: SizedBox(
+              width: double.infinity,
+              child: Column(
+                children: <Widget>[
+                  Observer(
+                    builder: (_) => SavingsCard(
+                      isDarkTheme: currentTheme.isDark,
+                      interestRate: "${_dEuroViewModel.interestRateFormated}%",
+                      savingsBalance: _dEuroViewModel.savingsBalanceFormated,
+                      fiatSavingsBalance: _dEuroViewModel.fiatSavingsBalanceFormated,
+                      currency: CryptoCurrency.deuro,
+                      fiatCurrency: _dEuroViewModel.isFiatDisabled ? null : _dEuroViewModel.fiat,
+                      onAddSavingsPressed: () => _onSavingsAdd(context),
+                      onRemoveSavingsPressed: () => _onSavingsRemove(context),
+                      onApproveSavingsPressed: _dEuroViewModel.prepareApproval,
+                      onTooltipPressed: () => _onSavingsTooltipPressed(context),
+                      isEnabled: _dEuroViewModel.isEnabled,
+                      isLoading: _dEuroViewModel.isLoading,
+                    ),
+                  ),
+                  Observer(
+                    builder: (_) => InterestCardWidget(
+                      isDarkTheme: currentTheme.isDark,
+                      title: S.of(context).deuro_savings_collect_interest,
+                      fiatAccruedInterest: _dEuroViewModel.fiatAccruedInterestFormated,
+                      fiatCurrency: _dEuroViewModel.isFiatDisabled ? null : _dEuroViewModel.fiat,
+                      accruedInterest: _dEuroViewModel.accruedInterestFormated,
+                      onCollectInterest: _onCollectInterest,
+                      onReinvestInterest: _onReinvestInterest,
+                      onTooltipPressed: () => _onInterestTooltipPressed(context),
+                      isEnabled: _dEuroViewModel.isSavingsActionsEnabled,
+                    ),
+                  ),
+                  Spacer(),
+                  SafeArea(
+                    child: Padding(
+                      padding: EdgeInsets.only(bottom: 30),
+                      child: Row(
+                        mainAxisAlignment: MainAxisAlignment.center,
+                        children: [
+                          InfoChip(
+                            label: S.of(context).deuro_about_deuro,
+                            icon: CupertinoIcons.info,
+                            onPressed: () => _showWelcomeTooltip(context),
+                          ),
+                          SizedBox(width: 10),
+                          InfoChip(
+                            label: S.of(context).website,
+                            icon: CupertinoIcons.globe,
+                            onPressed: () => launchUrlString("https://deuro.com/"),
+                          )
+                        ],
+                      ),
+                    ),
                   ),
-                  SizedBox(width: 10),
-                  InfoChip(
-                    label: S.of(context).website,
-                    icon: CupertinoIcons.globe,
-                    onPressed: () => launchUrlString("https://deuro.com/"),
-                  )
                 ],
               ),
             ),
@@ -126,14 +113,36 @@ class DEuroSavingsPage extends BasePage {
     );
   }
 
+  bool _editSheetIsOpen = false;
+
   Future<void> _onSavingsAdd(BuildContext context) async {
+    if (_editSheetIsOpen) return;
+    _editSheetIsOpen = true;
     final amount = await _showEditBottomSheet(context, isAdding: true);
     if (amount != null) _dEuroViewModel.prepareSavingsEdit(amount, true);
+    _editSheetIsOpen = false;
   }
 
   Future<void> _onSavingsRemove(BuildContext context) async {
+    if (_editSheetIsOpen) return;
+    _editSheetIsOpen = true;
     final amount = await _showEditBottomSheet(context, isAdding: false);
     if (amount != null) _dEuroViewModel.prepareSavingsEdit(amount, false);
+    _editSheetIsOpen = false;
+  }
+
+  Future<void> _onReinvestInterest() async {
+    if (_editSheetIsOpen) return;
+    _editSheetIsOpen = true;
+    await _dEuroViewModel.prepareReinvestInterest();
+    _editSheetIsOpen = false;
+  }
+
+  Future<void> _onCollectInterest() async {
+    if (_editSheetIsOpen) return;
+    _editSheetIsOpen = true;
+    await _dEuroViewModel.prepareCollectInterest();
+    _editSheetIsOpen = false;
   }
 
   bool _isReactionsSet = false;
@@ -175,10 +184,10 @@ class DEuroSavingsPage extends BasePage {
           currency: CryptoCurrency.deuro,
           amount: S.of(bottomSheetContext).send_amount,
           amountValue: _dEuroViewModel.actionType == DEuroActionType.reinvest
-              ? _dEuroViewModel.accruedInterest
+              ? _dEuroViewModel.accruedInterestFormated
               : tx.amountFormatted,
           fiatAmountValue: _dEuroViewModel.actionType == DEuroActionType.reinvest
-              ? _dEuroViewModel.fiatAccruedInterest
+              ? _dEuroViewModel.fiatAccruedInterestFormated
               : _dEuroViewModel.pendingTransactionFiatAmountFormatted,
           fee: S.of(bottomSheetContext).send_estimated_fee,
           feeValue: tx.feeFormatted,
@@ -301,11 +310,11 @@ class DEuroSavingsPage extends BasePage {
 
     showModalBottomSheet<void>(
       context: context,
-      builder: (BuildContext bottomSheetContext) => InfoBottomSheet(
+      builder: (BuildContext bottomSheetContext) => TooltipSheet(
         currentTheme: currentTheme,
         titleText: title,
         titleIconPath: CryptoCurrency.deuro.iconPath,
-        content: content,
+        tooltip: content,
         footerType: FooterType.doubleActionButton,
         doubleActionRightButtonText: S.of(context).close,
         rightActionButtonKey: ValueKey('deuro_page_tooltip_dialog_${key}_ok_button_key'),
@@ -358,7 +367,8 @@ class DEuroSavingsPage extends BasePage {
         content: S.of(context).deuro_tooltip_no_eth,
         singleActionButtonKey: ValueKey('deuro_page_tooltip_dialog_no_eth_ok_button_key'),
         singleActionButtonText: S.of(context).close,
-        onSingleActionButtonPressed: () => Navigator.of(bottomSheetContext).pop(), footerType: FooterType.singleActionButton,
+        onSingleActionButtonPressed: () => Navigator.of(bottomSheetContext).pop(),
+        footerType: FooterType.singleActionButton,
       ),
     );
   }
@@ -375,7 +385,9 @@ class DEuroSavingsPage extends BasePage {
         balanceTitle: isAdding
             ? S.of(context).deuro_savings_available_to_add
             : S.of(context).deuro_savings_available_to_remove,
-        balance: isAdding ? _dEuroViewModel.accountBalance : _dEuroViewModel.savingsBalance,
+        balance: isAdding
+            ? _dEuroViewModel.accountBalanceFormated
+            : _dEuroViewModel.savingsBalanceFormated,
         footerType: FooterType.none,
         maxHeight: MediaQuery.of(context).size.height * 0.8,
       ),

lib/src/screens/integrations/deuro/widgets/savings_edit_sheet.dart

@@ -3,6 +3,7 @@ import 'package:cake_wallet/generated/i18n.dart';
 import 'package:cake_wallet/src/screens/integrations/deuro/widgets/numpad.dart';
 import 'package:cake_wallet/src/widgets/bottom_sheet/base_bottom_sheet_widget.dart';
 import 'package:cake_wallet/src/widgets/primary_button.dart';
+import 'package:cw_core/parse_fixed.dart';
 import 'package:flutter/material.dart';
 
 class SavingsEditSheet extends BaseBottomSheet {
@@ -14,7 +15,8 @@ class SavingsEditSheet extends BaseBottomSheet {
     super.titleIconPath,
     this.balance,
     this.balanceTitle,
-    required super.footerType, required super.maxHeight,
+    required super.footerType,
+    required super.maxHeight,
   });
 
   @override
@@ -53,8 +55,35 @@ class _SavingsEditBodyState extends State<_SavingsEditBody> {
   }
 
   String amount = '0';
+  bool isValid = false;
   final FocusNode _numpadFocusNode = FocusNode();
 
+  void _onPressedAll() => setState(() {
+        amount = widget.balance!;
+        isValid = _validate();
+      });
+
+  void _onNumberPressed(int i) => setState(() {
+        amount = amount == '0' ? i.toString() : '${amount}${i}';
+        isValid = _validate();
+      });
+
+  void _onDeletePressed() => setState(() {
+        amount = amount.length > 1 ? amount.substring(0, amount.length - 1) : '0';
+        isValid = _validate();
+      });
+
+  void _onDecimalPressed() => setState(() {
+        amount = '${amount.replaceAll('.', '')}.';
+        isValid = _validate();
+      });
+
+  bool _validate() {
+    final amountBigInt = parseFixed(amount, 18);
+    final balanceBigInt = parseFixed(widget.balance!, 18);
+    return balanceBigInt >= amountBigInt && amountBigInt > BigInt.zero;
+  }
+
   @override
   Widget build(BuildContext context) => SafeArea(
         child: Column(children: [
@@ -80,18 +109,14 @@ class _SavingsEditBodyState extends State<_SavingsEditBody> {
             AssetBalanceRow(
               title: widget.balanceTitle!,
               amount: widget.balance!,
-              onAllPressed: () => setState(() => amount = widget.balance!),
+              onAllPressed: _onPressedAll,
             ),
           ],
           NumberPad(
             focusNode: _numpadFocusNode,
-            onNumberPressed: (i) => setState(
-              () => amount = amount == '0' ? i.toString() : '${amount}${i}',
-            ),
-            onDeletePressed: () => setState(
-              () => amount = amount.length > 1 ? amount.substring(0, amount.length - 1) : '0',
-            ),
-            onDecimalPressed: () => setState(() => amount = '${amount.replaceAll('.', '')}.'),
+            onNumberPressed: _onNumberPressed,
+            onDeletePressed: _onDeletePressed,
+            onDecimalPressed: _onDecimalPressed,
           ),
           Padding(
             padding: const EdgeInsets.fromLTRB(16, 12, 16, 0),
@@ -101,7 +126,7 @@ class _SavingsEditBodyState extends State<_SavingsEditBody> {
               color: Theme.of(context).colorScheme.primary,
               textColor: Theme.of(context).colorScheme.onPrimary,
               isLoading: false,
-              isDisabled: false,
+              isDisabled: !isValid,
             ),
           )
         ]),

lib/src/widgets/bottom_sheet/tooltip_bottom_sheet.dart

@@ -0,0 +1,46 @@
+import 'package:auto_size_text/auto_size_text.dart';
+import 'package:cake_wallet/src/widgets/bottom_sheet/base_bottom_sheet_widget.dart';
+import 'package:flutter/material.dart';
+
+class TooltipSheet extends BaseBottomSheet {
+  final String tooltip;
+
+  const TooltipSheet({
+    required super.currentTheme,
+    required super.titleText,
+    super.titleIconPath,
+    required this.tooltip,
+    required super.footerType,
+    super.maxHeight = 900,
+    super.singleActionButtonText,
+    super.onSingleActionButtonPressed,
+    super.singleActionButtonKey,
+    super.doubleActionLeftButtonText,
+    super.doubleActionRightButtonText,
+    super.onLeftActionButtonPressed,
+    super.onRightActionButtonPressed,
+    super.leftActionButtonKey,
+    super.rightActionButtonKey,
+  });
+
+  @override
+  Widget contentWidget(BuildContext context) => Container(
+    decoration: BoxDecoration(
+        borderRadius: BorderRadius.circular(10),
+        color: Theme.of(context).colorScheme.surfaceContainer),
+    margin: const EdgeInsets.all(12),
+    padding: const EdgeInsets.all(12),
+    child: AutoSizeText(
+      tooltip,
+      textAlign: TextAlign.center,
+      style: Theme.of(context).textTheme.bodyMedium!.copyWith(
+        fontSize: 16,
+        fontWeight: FontWeight.w500,
+        color: Theme.of(context).colorScheme.onSurfaceVariant,
+        decoration: TextDecoration.none,
+      ),
+    ),
+  );
+
+  Widget footerWidget(BuildContext context) => SizedBox.shrink();
+}

lib/view_model/integrations/deuro_view_model.dart

@@ -21,6 +21,8 @@ class DEuroViewModel = DEuroViewModelBase with _$DEuroViewModel;
 abstract class DEuroViewModelBase with Store {
   final AppStore _appStore;
 
+  static BigInt get MIN_ACCRUED_INTEREST => BigInt.parse("1000000000000");
+
   DEuroViewModelBase(
     this._appStore,
     this.balanceViewModel,
@@ -44,39 +46,31 @@ abstract class DEuroViewModelBase with Store {
   @action
   void acceptDisclaimer() => _settingsStore.shouldShowDEuroDisclaimer = false;
 
-  @computed
-  String get pendingTransactionFiatAmountFormatted =>
-      isFiatDisabled ? '' : '$pendingTransactionFiatAmount ${fiat.title}';
-
-  @computed
-  String get pendingTransactionFeeFiatAmountFormatted =>
-      isFiatDisabled ? '' : '$pendingTransactionFeeFiatAmount ${fiat.title}';
-
   FiatCurrency get fiat => _settingsStore.fiatCurrency;
 
   @computed
-  String get pendingTransactionFiatAmount =>
-      transaction == null ? '0.00' : _getDEuroFiatAmount(transaction!.amountFormatted);
-
-  @computed
-  String get pendingTransactionFeeFiatAmount {
-    try {
-      if (transaction != null) {
-        final currency = CryptoCurrency.eth;
-        return calculateFiatAmount(
-            price: _fiatConversationStore.prices[currency]!,
-            cryptoAmount: transaction!.feeFormattedValue,
-          );
-      } else {
-        return '0.00';
-      }
-    } catch (_) {
-      return '0.00';
-    }
+  String get pendingTransactionFiatAmountFormatted {
+    final amount = transaction == null ? '0.00' : _getDEuroFiatAmount(transaction!.amountFormatted);
+    return isFiatDisabled ? '' : '$amount ${fiat.title}';
   }
 
   @computed
-  String get accountBalance {
+  String get pendingTransactionFeeFiatAmountFormatted {
+    var amount = '0.00';
+    try {
+      if (transaction != null) {
+        final feeCurrency = CryptoCurrency.eth;
+        amount = calculateFiatAmount(
+          price: _fiatConversationStore.prices[feeCurrency]!,
+          cryptoAmount: transaction!.feeFormattedValue,
+        );
+      }
+    } catch (_) {}
+    return isFiatDisabled ? '' : '$amount ${fiat.title}';
+  }
+
+  @computed
+  String get accountBalanceFormated {
     final dEuroKey = balanceViewModel.balances.keys
         .firstWhereOrNull((e) => e.title == CryptoCurrency.deuro.title);
     if (dEuroKey == null) return '0.00';
@@ -84,22 +78,30 @@ abstract class DEuroViewModelBase with Store {
   }
 
   @observable
-  String savingsBalance = '0.00';
+  BigInt savingsBalance = BigInt.zero;
 
   @computed
-  String get fiatSavingsBalance => _getDEuroFiatAmount(savingsBalance);
+  String get savingsBalanceFormated =>
+      ethereum!.formatterEthereumAmountToDouble(amount: savingsBalance).toStringAsFixed(6);
+
+  @computed
+  String get fiatSavingsBalanceFormated => _getDEuroFiatAmount(savingsBalanceFormated);
 
   @observable
   ExecutionState state = InitialExecutionState();
 
   @observable
-  String interestRate = '0';
+  String interestRateFormated = '0';
 
   @observable
-  String accruedInterest = '0.00';
+  BigInt accruedInterest = BigInt.zero;
 
   @computed
-  String get fiatAccruedInterest => _getDEuroFiatAmount(accruedInterest);
+  String get accruedInterestFormated =>
+      ethereum!.formatterEthereumAmountToDouble(amount: accruedInterest).toStringAsFixed(6);
+
+  @computed
+  String get fiatAccruedInterestFormated => _getDEuroFiatAmount(accruedInterestFormated);
 
   @observable
   BigInt approvedTokens = BigInt.zero;
@@ -107,6 +109,9 @@ abstract class DEuroViewModelBase with Store {
   @computed
   bool get isEnabled => approvedTokens > BigInt.zero;
 
+  @computed
+  bool get isSavingsActionsEnabled => isEnabled && accruedInterest >= MIN_ACCRUED_INTEREST;
+
   @observable
   bool isLoading = true;
 
@@ -121,17 +126,9 @@ abstract class DEuroViewModelBase with Store {
 
   @action
   Future<void> reloadSavingsUserData() async {
-    final savingsBalanceRaw = ethereum!.getDEuroSavingsBalance(_appStore.wallet!);
-    final accruedInterestRaw = ethereum!.getDEuroAccruedInterest(_appStore.wallet!);
-
     approvedTokens = await ethereum!.getDEuroSavingsApproved(_appStore.wallet!);
-
-    savingsBalance = ethereum!
-        .formatterEthereumAmountToDouble(amount: await savingsBalanceRaw)
-        .toStringAsFixed(6);
-    accruedInterest = ethereum!
-        .formatterEthereumAmountToDouble(amount: await accruedInterestRaw)
-        .toStringAsFixed(6);
+    savingsBalance = await ethereum!.getDEuroSavingsBalance(_appStore.wallet!);
+    accruedInterest = await ethereum!.getDEuroAccruedInterest(_appStore.wallet!);
     isLoading = false;
   }
 
@@ -139,7 +136,7 @@ abstract class DEuroViewModelBase with Store {
   Future<void> reloadInterestRate() async {
     final interestRateRaw = await ethereum!.getDEuroInterestRate(_appStore.wallet!);
 
-    interestRate = (interestRateRaw / BigInt.from(10000)).toString();
+    interestRateFormated = (interestRateRaw / BigInt.from(10000)).toString();
   }
 
   @action
@@ -175,7 +172,7 @@ abstract class DEuroViewModelBase with Store {
     }
   }
 
-  Future<void> prepareCollectInterest() => prepareSavingsEdit(accruedInterest, false);
+  Future<void> prepareCollectInterest() => prepareSavingsEdit(accruedInterestFormated, false);
 
   Future<void> prepareReinvestInterest() async {
     try {
@@ -230,13 +227,13 @@ abstract class DEuroViewModelBase with Store {
 
   String _getDEuroFiatAmount(String amount) {
     try {
-      CryptoCurrency deuro = CryptoCurrency.deuro;
+      var dEuro = CryptoCurrency.deuro;
       final keys = _fiatConversationStore.prices.keys.toList();
       for (final key in keys) {
-        if (key.title == "DEURO") deuro = key;
+        if (key.title == "DEURO") dEuro = key;
       }
       return calculateFiatAmount(
-        price: _fiatConversationStore.prices[deuro]!,
+        price: _fiatConversationStore.prices[dEuro]!,
         cryptoAmount: amount,
       );
     } catch (_) {