feat: show gas conversion rate for dEURO savings (#2351)

* feat: show gas currency on EVM chains

* feat: show gas conversion rate for dEURO savings

* Update lib/polygon/cw_polygon.dart [skip ci]

* Update cw_evm/lib/evm_chain_wallet.dart [skip ci]

---------

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

cw_ethereum/lib/deuro/deuro_savings.dart

@@ -89,6 +89,7 @@ class DEuro {
       final sendTransaction = () => _wallet.getWeb3Client()!.sendRawTransaction(signedTransaction);
 
       return PendingEVMChainTransaction(
+        feeCurrency: "ETH",
         sendTransaction: sendTransaction,
         signedTransaction: signedTransaction,
         fee: BigInt.from(fee.estimatedGasFee),
@@ -131,6 +132,7 @@ class DEuro {
           signedTransaction: signedTransaction,
           fee: BigInt.from(fee.estimatedGasFee),
           amount: amount.toString(),
+          feeCurrency: "ETH",
           exponent: 18);
     } catch (e) {
       if (e.toString().contains('insufficient funds for gas')) {
@@ -156,6 +158,7 @@ class DEuro {
         _savingsGateway.self.address.hexEip55,
         CryptoCurrency.deuro,
         priority,
+        "ETH"
       )) as PendingEVMChainTransaction;
     } catch (e) {
       if (e.toString().contains('insufficient funds for gas')) {

cw_evm/lib/evm_chain_client.dart

@@ -161,6 +161,7 @@ abstract class EVMChainClient {
     required int maxFeePerGas,
     required EVMChainTransactionPriority priority,
     required CryptoCurrency currency,
+    required String feeCurrency,
     required int exponent,
     String? contractAddress,
     String? data,
@@ -210,6 +211,7 @@ abstract class EVMChainClient {
       signedTransaction: prepareSignedTransactionForSending(signedTransaction),
       amount: amount.toString(),
       fee: gasFee,
+      feeCurrency: feeCurrency,
       sendTransaction: _sendTransaction,
       exponent: exponent,
     );
@@ -220,6 +222,7 @@ abstract class EVMChainClient {
     required String spender,
     required BigInt amount,
     required BigInt gasFee,
+    required String feeCurrency,
     required int estimatedGasUnits,
     required int maxFeePerGas,
     required EVMChainTransactionPriority priority,
@@ -255,6 +258,7 @@ abstract class EVMChainClient {
       signedTransaction: prepareSignedTransactionForSending(signedTransaction),
       amount: amount.toString(),
       fee: gasFee,
+      feeCurrency: feeCurrency,
       sendTransaction: () => sendTransaction(signedTransaction),
       exponent: exponent,
       isInfiniteApproval: amount.toRadixString(16) == 'ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff',

cw_evm/lib/evm_chain_wallet.dart

@@ -515,6 +515,11 @@ abstract class EVMChainWalletBase
       gasFee: estimatedFeesForTransaction,
       priority: _credentials.priority!,
       currency: transactionCurrency,
+      feeCurrency: switch (_client.chainId) {
+        1 => "ETH",
+        137 => "POL",
+        _ => ""
+      },
       maxFeePerGas: maxFeePerGasForTransaction,
       exponent: exponent,
       contractAddress:
@@ -527,7 +532,7 @@ abstract class EVMChainWalletBase
   }
 
   Future<PendingTransaction> createApprovalTransaction(BigInt amount, String spender,
-      CryptoCurrency token, EVMChainTransactionPriority priority) async {
+      CryptoCurrency token, EVMChainTransactionPriority priority, String feeCurrency) async {
     final CryptoCurrency transactionCurrency =
         balance.keys.firstWhere((element) => element.title == token.title);
     assert(transactionCurrency is Erc20Token);
@@ -553,6 +558,7 @@ abstract class EVMChainWalletBase
       priority: priority,
       gasFee: BigInt.from(gasFeesModel.estimatedGasFee),
       maxFeePerGas: gasFeesModel.maxFeePerGas,
+      feeCurrency: feeCurrency,
       estimatedGasUnits: gasFeesModel.estimatedGasUnits,
       exponent: transactionCurrency.decimal,
       contractAddress: transactionCurrency.contractAddress,

cw_evm/lib/pending_evm_chain_transaction.dart

@@ -9,6 +9,7 @@ class PendingEVMChainTransaction with PendingTransaction {
   final Function sendTransaction;
   final Uint8List signedTransaction;
   final BigInt fee;
+  final String feeCurrency;
   final String amount;
   final int exponent;
   final bool isInfiniteApproval;
@@ -17,6 +18,7 @@ class PendingEVMChainTransaction with PendingTransaction {
     required this.sendTransaction,
     required this.signedTransaction,
     required this.fee,
+    required this.feeCurrency,
     required this.amount,
     required this.exponent,
     this.isInfiniteApproval = false,
@@ -35,7 +37,7 @@ class PendingEVMChainTransaction with PendingTransaction {
   @override
   String get feeFormatted {
     final _fee = (fee / BigInt.from(pow(10, 18))).toString();
-    return _fee.substring(0, min(10, _fee.length));
+    return "${_fee.substring(0, min(10, _fee.length))} $feeCurrency";
   }
 
   @override

lib/di.dart

@@ -1518,7 +1518,12 @@ Future<void> setup({
 
   getIt.registerFactory(() => StartTorPage(StartTorViewModel(),));
   
-  getIt.registerFactory(() => DEuroViewModel(getIt<AppStore>()));
+  getIt.registerFactory(() => DEuroViewModel(
+    getIt<AppStore>(),
+    getIt<BalanceViewModel>(),
+    getIt<SettingsStore>(),
+    getIt<FiatConversionStore>(),
+  ));
 
   getIt.registerFactory(() => DEuroSavingsPage(getIt<DEuroViewModel>()));
 

lib/ethereum/cw_ethereum.dart

@@ -213,7 +213,7 @@ class CWEthereum extends Ethereum {
   Future<PendingTransaction> createTokenApproval(WalletBase wallet, BigInt amount, String spender,
           CryptoCurrency token, TransactionPriority priority) =>
       (wallet as EVMChainWallet).createApprovalTransaction(
-          amount, spender, token, priority as EVMChainTransactionPriority);
+          amount, spender, token, priority as EVMChainTransactionPriority, "ETH");
 
   // Integrations
   @override

lib/polygon/cw_polygon.dart

@@ -189,7 +189,7 @@ class CWPolygon extends Polygon {
   Future<PendingTransaction> createTokenApproval(WalletBase wallet,
           BigInt amount, String spender, CryptoCurrency token, TransactionPriority priority) =>
       (wallet as EVMChainWallet)
-          .createApprovalTransaction(amount, spender, token, priority as EVMChainTransactionPriority);
+          .createApprovalTransaction(amount, spender, token, priority as EVMChainTransactionPriority, "POL");
 
   @override
   void setLedgerConnection(

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

@@ -125,10 +125,10 @@ class DEuroSavingsPage extends BasePage {
           currency: CryptoCurrency.deuro,
           amount: S.of(bottomSheetContext).send_amount,
           amountValue: tx.amountFormatted,
-          fiatAmountValue: "",
+          fiatAmountValue: _dEuroViewModel.pendingTransactionFiatAmountFormatted,
           fee: S.of(bottomSheetContext).send_estimated_fee,
           feeValue: tx.feeFormatted,
-          feeFiatAmount: "",
+          feeFiatAmount: _dEuroViewModel.pendingTransactionFeeFiatAmountFormatted,
           outputs: [],
           onSlideComplete: () async {
             Navigator.of(bottomSheetContext).pop(true);

lib/view_model/integrations/deuro_view_model.dart

@@ -1,8 +1,15 @@
 import 'package:cake_wallet/core/execution_state.dart';
+import 'package:cake_wallet/entities/calculate_fiat_amount.dart';
+import 'package:cake_wallet/entities/fiat_currency.dart';
 import 'package:cake_wallet/ethereum/ethereum.dart';
 import 'package:cake_wallet/store/app_store.dart';
+import 'package:cake_wallet/store/dashboard/fiat_conversion_store.dart';
+import 'package:cake_wallet/store/settings_store.dart';
+import 'package:cake_wallet/view_model/dashboard/balance_view_model.dart';
 import 'package:cake_wallet/view_model/send/send_view_model_state.dart';
+import 'package:cw_core/crypto_currency.dart';
 import 'package:cw_core/pending_transaction.dart';
+import 'package:cw_core/utils/print_verbose.dart';
 import 'package:cw_core/wallet_type.dart';
 import 'package:cw_core/parse_fixed.dart';
 import 'package:mobx/mobx.dart';
@@ -14,10 +21,69 @@ class DEuroViewModel = DEuroViewModelBase with _$DEuroViewModel;
 abstract class DEuroViewModelBase with Store {
   final AppStore _appStore;
 
-  DEuroViewModelBase(this._appStore) {
+  DEuroViewModelBase(this._appStore, this.balanceViewModel, this._settingsStore, this._fiatConversationStore) {
     reloadInterestRate();
     reloadSavingsUserData();
   }
+  final BalanceViewModel balanceViewModel;
+  final SettingsStore _settingsStore;
+  final FiatConversionStore _fiatConversationStore;
+  
+  @computed
+  bool get isFiatDisabled => balanceViewModel.isFiatDisabled;
+
+  @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 {
+    if (transaction == null) {
+      return '0.00';
+    }
+
+    try {
+      final keys = _fiatConversationStore.prices.keys.toList();
+      CryptoCurrency deuro = CryptoCurrency.deuro;
+      for (var i = 0; i < keys.length; i++) {
+        if (keys[i].title == "DEURO") {
+          deuro = keys[i];
+        }
+      }
+      final fiat = calculateFiatAmount(
+          price: _fiatConversationStore.prices[deuro]!,
+          cryptoAmount: transaction!.amountFormatted);
+      return fiat;
+    } catch (e) {
+      printV(e);
+      return '0.02';
+    }
+  }
+
+  @computed
+  String get pendingTransactionFeeFiatAmount {
+    try {
+      if (transaction != null) {
+        final currency = CryptoCurrency.eth;
+        final fiat = calculateFiatAmount(
+            price: _fiatConversationStore.prices[currency]!,
+            cryptoAmount: transaction!.feeFormatted.substring(0, transaction!.feeFormatted.indexOf(" ")),
+          );
+        return fiat;
+      } else {
+        return '0.00';
+      }
+    } catch (_) {
+      return '0.00';
+    }
+  }
 
   @observable
   String savingsBalance = '0.00';

lib/view_model/send/send_view_model.dart

@@ -183,7 +183,8 @@ abstract class SendViewModelBase extends WalletChangeListenerViewModel with Stor
         final currency = pendingTransactionFeeCurrency(walletType);
         final fiat = calculateFiatAmount(
             price: _fiatConversationStore.prices[currency]!,
-            cryptoAmount: pendingTransaction!.feeFormatted);
+            cryptoAmount: pendingTransaction!.feeFormatted.substring(0, pendingTransaction!.feeFormatted.indexOf(" ")),
+          );
         return fiat;
       } else {
         return '0.00';