Fixes

lib/bitcoin/bitcoin_amount_format.dart

@@ -1,3 +1,5 @@
+import 'dart:math';
+
 import 'package:intl/intl.dart';
 import 'package:cake_wallet/entities/crypto_amount_format.dart';
 
@@ -7,10 +9,32 @@ final bitcoinAmountFormat = NumberFormat()
   ..maximumFractionDigits = bitcoinAmountLength
   ..minimumFractionDigits = 1;
 
-String bitcoinAmountToString({int amount}) =>
-    bitcoinAmountFormat.format(cryptoAmountToDouble(amount: amount, divider: bitcoinAmountDivider));
+String bitcoinAmountToString({int amount}) => bitcoinAmountFormat.format(
+    cryptoAmountToDouble(amount: amount, divider: bitcoinAmountDivider));
 
-double bitcoinAmountToDouble({int amount}) => cryptoAmountToDouble(amount: amount, divider: bitcoinAmountDivider);
+double bitcoinAmountToDouble({int amount}) =>
+    cryptoAmountToDouble(amount: amount, divider: bitcoinAmountDivider);
 
-int doubleToBitcoinAmount(double amount) =>
-    (amount * bitcoinAmountDivider).toInt();
+int stringDoubleToBitcoinAmount(String amount) {
+  final splitted = amount.split('');
+  final dotIndex = amount.indexOf('.');
+  int result = 0;
+
+
+  for (var i = 0; i < splitted.length; i++) {
+    try {
+      if (dotIndex == i) {
+        continue;
+      }
+
+      final char = splitted[i];
+      final multiplier = dotIndex < i
+          ? bitcoinAmountDivider ~/ pow(10, (i - dotIndex))
+          : (bitcoinAmountDivider * pow(10, (dotIndex - i -1))).toInt();
+      final num = int.parse(char) * multiplier;
+      result += num;
+    } catch (_) {}
+  }
+
+  return result;
+}

lib/bitcoin/bitcoin_transaction_credentials.dart

@@ -4,6 +4,6 @@ class BitcoinTransactionCredentials {
   BitcoinTransactionCredentials(this.address, this.amount, this.priority);
 
   final String address;
-  final double amount;
+  final String amount;
   TransactionPriority priority;
 }

lib/bitcoin/bitcoin_transaction_info.dart

@@ -47,7 +47,7 @@ class BitcoinTransactionInfo extends TransactionInfo {
       final out = vin['tx']['vout'][vout] as Map;
       final outAddresses =
           (out['scriptPubKey']['addresses'] as List<Object>)?.toSet();
-      inputsAmount += doubleToBitcoinAmount(out['value'] as double ?? 0);
+      inputsAmount += stringDoubleToBitcoinAmount((out['value'] as double ?? 0).toString());
 
       if (outAddresses?.intersection(addressesSet)?.isNotEmpty ?? false) {
         direction = TransactionDirection.outgoing;
@@ -58,7 +58,7 @@ class BitcoinTransactionInfo extends TransactionInfo {
       final outAddresses =
           out['scriptPubKey']['addresses'] as List<Object> ?? [];
       final ntrs = outAddresses.toSet().intersection(addressesSet);
-      final value = doubleToBitcoinAmount(out['value'] as double ?? 0.0);
+      final value = stringDoubleToBitcoinAmount((out['value'] as double ?? 0.0).toString());
       totalOutAmount += value;
 
       if ((direction == TransactionDirection.incoming && ntrs.isNotEmpty) ||

lib/bitcoin/bitcoin_wallet.dart

@@ -116,6 +116,19 @@ abstract class BitcoinWalletBase extends WalletBase<BitcoinBalance> with Store {
         walletInfo: walletInfo);
   }
 
+  static int feeAmountForPriority(TransactionPriority priority) {
+    switch (priority) {
+      case TransactionPriority.slow:
+        return 6000;
+      case TransactionPriority.regular:
+        return 22080;
+      case TransactionPriority.fast:
+        return 24000;
+      default:
+        return 0;
+    }
+  }
+
   @override
   final BitcoinTransactionHistory transactionHistory;
   final String path;
@@ -243,16 +256,20 @@ abstract class BitcoinWalletBase extends WalletBase<BitcoinBalance> with Store {
       Object credentials) async {
     final transactionCredentials = credentials as BitcoinTransactionCredentials;
     final inputs = <BitcoinUnspent>[];
-    final fee = _feeMultiplier(transactionCredentials.priority);
+    final fee = feeAmountForPriority(transactionCredentials.priority);
     final amount = transactionCredentials.amount != null
-        ? doubleToBitcoinAmount(transactionCredentials.amount)
-        : balance.total - fee;
+        ? stringDoubleToBitcoinAmount(transactionCredentials.amount)
+        : balance.availableBalance - fee;
     final totalAmount = amount + fee;
     final txb = bitcoin.TransactionBuilder(network: bitcoin.bitcoin);
-    var leftAmount = totalAmount;
     final changeAddress = address;
+    var leftAmount = totalAmount;
     var totalInputAmount = 0;
 
+    if (totalAmount > balance.availableBalance) {
+      throw BitcoinTransactionWrongBalanceException();
+    }
+
     final unspent = addresses.map((address) => eclient
         .getListUnspentWithAddress(address.address)
         .then((unspent) => unspent
@@ -334,7 +351,7 @@ abstract class BitcoinWalletBase extends WalletBase<BitcoinBalance> with Store {
 
   @override
   double calculateEstimatedFee(TransactionPriority priority) =>
-      bitcoinAmountToDouble(amount: _feeMultiplier(priority));
+      bitcoinAmountToDouble(amount: feeAmountForPriority(priority));
 
   @override
   Future<void> save() async {
@@ -386,17 +403,4 @@ abstract class BitcoinWalletBase extends WalletBase<BitcoinBalance> with Store {
 
   String _getAddress({@required int index}) =>
       generateAddress(hd: hd, index: index);
-
-  int _feeMultiplier(TransactionPriority priority) {
-    switch (priority) {
-      case TransactionPriority.slow:
-        return 6000;
-      case TransactionPriority.regular:
-        return 22080;
-      case TransactionPriority.fast:
-        return 24000;
-      default:
-        return 0;
-    }
-  }
 }

lib/di.dart

@@ -355,7 +355,8 @@ Future setup(
       getIt.get<AppStore>().wallet,
       tradesSource,
       getIt.get<ExchangeTemplateStore>(),
-      getIt.get<TradesStore>()));
+      getIt.get<TradesStore>(),
+      getIt.get<AppStore>().settingsStore));
 
   getIt.registerFactory(() => ExchangeTradeViewModel(
       wallet: getIt.get<AppStore>().wallet,

lib/main.dart

@@ -1,3 +1,4 @@
+import 'package:cake_wallet/bitcoin/bitcoin_amount_format.dart';
 import 'package:cake_wallet/themes/theme_base.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';

lib/src/screens/exchange/exchange_page.dart

@@ -62,10 +62,11 @@ class ExchangePage extends BasePage {
 
   @override
   Widget trailing(BuildContext context) => TrailButton(
-      caption: S.of(context).reset, onPressed: () {
+      caption: S.of(context).reset,
+      onPressed: () {
         _formKey.currentState.reset();
         exchangeViewModel.reset();
-  });
+      });
 
   @override
   Widget body(BuildContext context) {
@@ -95,8 +96,8 @@ class ExchangePage extends BasePage {
     return KeyboardActions(
         config: KeyboardActionsConfig(
             keyboardActionsPlatform: KeyboardActionsPlatform.IOS,
-            keyboardBarColor: Theme.of(context).accentTextTheme.body2
-                .backgroundColor,
+            keyboardBarColor:
+                Theme.of(context).accentTextTheme.body2.backgroundColor,
             nextFocus: false,
             actions: [
               KeyboardActionsItem(
@@ -160,6 +161,11 @@ class ExchangePage extends BasePage {
                             padding: EdgeInsets.fromLTRB(24, 100, 24, 32),
                             child: Observer(
                               builder: (_) => ExchangeCard(
+                                hasAllAmount: exchangeViewModel.hasAllAmount,
+                                allAmount: exchangeViewModel.hasAllAmount
+                                    ? () => exchangeViewModel
+                                        .calculateDepositAllAmount()
+                                    : null,
                                 amountFocusNode: _depositAmountFocus,
                                 key: depositKey,
                                 title: S.of(context).you_will_send,
@@ -394,30 +400,35 @@ class ExchangePage extends BasePage {
                     }),
                   ),
                   Observer(
-                    builder: (_) => LoadingPrimaryButton(
-                      text: S.of(context).exchange,
-                      onPressed: () {
-                        if (_formKey.currentState.validate()) {
-                          if ((exchangeViewModel.depositCurrency == CryptoCurrency.xmr)
-                          &&(!(exchangeViewModel.status is SyncedSyncStatus))) {
-                            showPopUp<void>(
-                              context: context,
-                              builder: (BuildContext context) {
-                                return AlertWithOneAction(
-                                  alertTitle: S.of(context).exchange,
-                                  alertContent: S.of(context).exchange_sync_alert_content,
-                                  buttonText: S.of(context).ok,
-                                  buttonAction: () => Navigator.of(context).pop());
-                              });
-                          } else {
-                            exchangeViewModel.createTrade();
-                          }
-                        }
-                      },
-                      color: Theme.of(context).accentTextTheme.body2.color,
-                      textColor: Colors.white,
-                      isLoading: exchangeViewModel.tradeState
-                                 is TradeIsCreating)),
+                      builder: (_) => LoadingPrimaryButton(
+                          text: S.of(context).exchange,
+                          onPressed: () {
+                            if (_formKey.currentState.validate()) {
+                              if ((exchangeViewModel.depositCurrency ==
+                                      CryptoCurrency.xmr) &&
+                                  (!(exchangeViewModel.status
+                                      is SyncedSyncStatus))) {
+                                showPopUp<void>(
+                                    context: context,
+                                    builder: (BuildContext context) {
+                                      return AlertWithOneAction(
+                                          alertTitle: S.of(context).exchange,
+                                          alertContent: S
+                                              .of(context)
+                                              .exchange_sync_alert_content,
+                                          buttonText: S.of(context).ok,
+                                          buttonAction: () =>
+                                              Navigator.of(context).pop());
+                                    });
+                              } else {
+                                exchangeViewModel.createTrade();
+                              }
+                            }
+                          },
+                          color: Theme.of(context).accentTextTheme.body2.color,
+                          textColor: Colors.white,
+                          isLoading:
+                              exchangeViewModel.tradeState is TradeIsCreating)),
                 ]),
               )),
         ));

lib/src/screens/exchange/widgets/exchange_card.dart

@@ -27,7 +27,9 @@ class ExchangeCard extends StatefulWidget {
       this.borderColor = Colors.transparent,
       this.currencyValueValidator,
       this.addressTextFieldValidator,
-      this.amountFocusNode})
+      this.amountFocusNode,
+      this.hasAllAmount = false,
+      this.allAmount})
       : super(key: key);
 
   final List<CryptoCurrency> currencies;
@@ -47,6 +49,8 @@ class ExchangeCard extends StatefulWidget {
   final FormFieldValidator<String> currencyValueValidator;
   final FormFieldValidator<String> addressTextFieldValidator;
   final FocusNode amountFocusNode;
+  final bool hasAllAmount;
+  Function allAmount;
 
   @override
   ExchangeCardState createState() => ExchangeCardState();
@@ -197,7 +201,36 @@ class ExchangeCardState extends State<ExchangeCard> {
                           ]),
                     ),
                   ),
-                )
+                ),
+                if (widget.hasAllAmount)
+                  Positioned(
+                      top: 5,
+                      right: 55,
+                      child: Container(
+                        height: 32,
+                        width: 32,
+                        margin: EdgeInsets.only(left: 14, top: 4, bottom: 10),
+                        decoration: BoxDecoration(
+                            color: Theme.of(context)
+                                .primaryTextTheme
+                                .display1
+                                .color,
+                            borderRadius: BorderRadius.all(Radius.circular(6))),
+                        child: InkWell(
+                          onTap: () => widget.allAmount?.call(),
+                          child: Center(
+                            child: Text(S.of(context).all,
+                                textAlign: TextAlign.center,
+                                style: TextStyle(
+                                    fontSize: 12,
+                                    fontWeight: FontWeight.bold,
+                                    color: Theme.of(context)
+                                        .primaryTextTheme
+                                        .display1
+                                        .decorationColor)),
+                          ),
+                        ),
+                      ))
               ],
             )),
         Padding(
@@ -232,18 +265,17 @@ class ExchangeCardState extends State<ExchangeCard> {
         ),
         !_isAddressEditable && widget.hasRefundAddress
             ? Padding(
-            padding: EdgeInsets.only(top: 20),
-            child: Text(
-              S.of(context).refund_address,
-              style: TextStyle(
-                  fontSize: 14,
-                  fontWeight: FontWeight.w500,
-                  color:
-                  Theme.of(context)
-                      .accentTextTheme
-                      .display4
-                      .decorationColor),
-            ))
+                padding: EdgeInsets.only(top: 20),
+                child: Text(
+                  S.of(context).refund_address,
+                  style: TextStyle(
+                      fontSize: 14,
+                      fontWeight: FontWeight.w500,
+                      color: Theme.of(context)
+                          .accentTextTheme
+                          .display4
+                          .decorationColor),
+                ))
             : Offstage(),
         _isAddressEditable
             ? Padding(
@@ -251,7 +283,8 @@ class ExchangeCardState extends State<ExchangeCard> {
                 child: AddressTextField(
                   controller: addressController,
                   placeholder: widget.hasRefundAddress
-                      ? S.of(context).refund_address : null,
+                      ? S.of(context).refund_address
+                      : null,
                   options: [
                     AddressTextFieldOption.paste,
                     AddressTextFieldOption.qrCode,
@@ -265,8 +298,7 @@ class ExchangeCardState extends State<ExchangeCard> {
                   hintStyle: TextStyle(
                       fontSize: 16,
                       fontWeight: FontWeight.w600,
-                      color:
-                      Theme.of(context)
+                      color: Theme.of(context)
                           .accentTextTheme
                           .display4
                           .decorationColor),
@@ -281,8 +313,8 @@ class ExchangeCardState extends State<ExchangeCard> {
                           onTap: () {
                             Clipboard.setData(
                                 ClipboardData(text: addressController.text));
-                            showBar<void>(context,
-                                S.of(context).copied_to_clipboard);
+                            showBar<void>(
+                                context, S.of(context).copied_to_clipboard);
                           },
                           child: Row(
                             mainAxisSize: MainAxisSize.max,

lib/store/settings_store.dart

@@ -153,7 +153,7 @@ abstract class SettingsStoreBase with Store {
             .getBool(PreferencesKey.allowBiometricalAuthenticationKey) ??
         false;
     final legacyTheme =
-        sharedPreferences.getBool(PreferencesKey.isDarkThemeLegacy)
+      (sharedPreferences.getBool(PreferencesKey.isDarkThemeLegacy) ?? false)
             ? ThemeType.dark.index
             : ThemeType.bright.index;
     final savedTheme = ThemeList.deserialize(

lib/view_model/exchange/exchange_view_model.dart

@@ -1,3 +1,5 @@
+import 'package:cake_wallet/bitcoin/bitcoin_amount_format.dart';
+import 'package:cake_wallet/bitcoin/bitcoin_wallet.dart';
 import 'package:cake_wallet/core/wallet_base.dart';
 import 'package:cake_wallet/entities/crypto_currency.dart';
 import 'package:cake_wallet/entities/sync_status.dart';
@@ -7,6 +9,7 @@ import 'package:cake_wallet/exchange/limits.dart';
 import 'package:cake_wallet/exchange/trade.dart';
 import 'package:cake_wallet/exchange/limits_state.dart';
 import 'package:cake_wallet/store/dashboard/trades_store.dart';
+import 'package:cake_wallet/store/settings_store.dart';
 import 'package:intl/intl.dart';
 import 'package:mobx/mobx.dart';
 import 'package:cake_wallet/generated/i18n.dart';
@@ -27,8 +30,8 @@ part 'exchange_view_model.g.dart';
 class ExchangeViewModel = ExchangeViewModelBase with _$ExchangeViewModel;
 
 abstract class ExchangeViewModelBase with Store {
-  ExchangeViewModelBase(
-      this.wallet, this.trades, this._exchangeTemplateStore, this.tradesStore) {
+  ExchangeViewModelBase(this.wallet, this.trades, this._exchangeTemplateStore,
+      this.tradesStore, this._settingsStore) {
     providerList = [
       XMRTOExchangeProvider(),
       ChangeNowExchangeProvider(),
@@ -104,10 +107,6 @@ abstract class ExchangeViewModelBase with Store {
   @observable
   bool isReceiveAmountEntered;
 
-  Limits limits;
-
-  NumberFormat _cryptoNumberFormat;
-
   @computed
   SyncStatus get status => wallet.syncStatus;
 
@@ -115,6 +114,15 @@ abstract class ExchangeViewModelBase with Store {
   ObservableList<ExchangeTemplate> get templates =>
       _exchangeTemplateStore.templates;
 
+  bool get hasAllAmount =>
+      wallet.type == WalletType.bitcoin && depositCurrency == wallet.currency;
+
+  Limits limits;
+
+  NumberFormat _cryptoNumberFormat;
+
+  SettingsStore _settingsStore;
+
   @action
   void changeProvider({ExchangeProvider provider}) {
     this.provider = provider;
@@ -264,9 +272,8 @@ abstract class ExchangeViewModelBase with Store {
           await trades.add(trade);
           tradeState = TradeIsCreatedSuccessfully(trade: trade);
         } catch (e) {
-          tradeState = TradeIsCreatedFailure(
-              title: provider.title,
-              error: e.toString());
+          tradeState =
+              TradeIsCreatedFailure(title: provider.title, error: e.toString());
         }
       }
     } else {
@@ -291,6 +298,22 @@ abstract class ExchangeViewModelBase with Store {
     _onPairChange();
   }
 
+  @action
+  void calculateDepositAllAmount() {
+    if (wallet is BitcoinWallet) {
+      final availableBalance = wallet.balance.availableBalance as int;
+      final fee = BitcoinWalletBase.feeAmountForPriority(
+          _settingsStore.transactionPriority);
+
+      if (availableBalance < fee || availableBalance == 0) {
+        return;
+      }
+
+      final amount = availableBalance - fee;
+      depositAmount = bitcoinAmountToString(amount: amount);
+    }
+  }
+
   void updateTemplate() => _exchangeTemplateStore.update();
 
   void addTemplate(

lib/view_model/send/send_view_model.dart

@@ -197,7 +197,7 @@ abstract class SendViewModelBase with Store {
 
     switch (_wallet.type) {
       case WalletType.bitcoin:
-        final amount = !sendAll ? double.parse(_amount) : null;
+        final amount = !sendAll ? _amount : null;
 
         return BitcoinTransactionCredentials(
             address, amount, _settingsStore.transactionPriority);