CAKE-177. CAKE-176. CAKE-115.

lib/di.dart

@@ -203,7 +203,8 @@ Future setup(
             authPageState.changeProcessText('Loading the wallet');
 
             if (loginError != null) {
-              authPageState.changeProcessText('ERROR: ${loginError.toString()}');
+              authPageState
+                  .changeProcessText('ERROR: ${loginError.toString()}');
             }
 
             ReactionDisposer _reaction;

lib/monero/pending_monero_transaction.dart

@@ -5,6 +5,14 @@ import 'package:cake_wallet/entities/crypto_currency.dart';
 import 'package:cake_wallet/core/amount_converter.dart';
 import 'package:cake_wallet/core/pending_transaction.dart';
 
+class DoubleSpendException implements Exception {
+  DoubleSpendException();
+
+  @override
+  String toString() =>
+      'This transaction cannot be committed. This can be due to many reasons including the wallet not being synced, there is not enough XMR in your available balance, or previous transactions are not yet fully processed.';
+}
+
 class PendingMoneroTransaction with PendingTransaction {
   PendingMoneroTransaction(this.pendingTransactionDescription);
 
@@ -22,7 +30,18 @@ class PendingMoneroTransaction with PendingTransaction {
       CryptoCurrency.xmr, pendingTransactionDescription.fee);
 
   @override
-  Future<void> commit() async =>
+  Future<void> commit() async {
+    try {
       monero_transaction_history.commitTransactionFromPointerAddress(
           address: pendingTransactionDescription.pointerAddress);
+    } catch (e) {
+      final message = e.toString();
+
+      if (message.contains('Reason: double spend')) {
+        throw DoubleSpendException();
+      }
+
+      rethrow;
+    }
+  }
 }

lib/src/screens/auth/auth_page.dart

@@ -39,14 +39,12 @@ class AuthPageState extends State<AuthPage> {
     _reaction ??=
         reaction((_) => widget.authViewModel.state, (ExecutionState state) {
       if (state is ExecutedSuccessfullyState) {
-        WidgetsBinding.instance.addPostFrameCallback((_) {
         if (widget.onAuthenticationFinished != null) {
           widget.onAuthenticationFinished(true, this);
         } else {
           _authBar?.dismiss();
           showBar<void>(context, S.of(context).authenticated);
         }
-        });
       }
 
       if (state is IsExecutingState) {

lib/src/screens/receive/receive_page.dart

@@ -1,3 +1,4 @@
+import 'package:cake_wallet/src/widgets/keyboard_done_button.dart';
 import 'package:cake_wallet/utils/show_pop_up.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/cupertino.dart';
@@ -15,9 +16,10 @@ import 'package:cake_wallet/view_model/wallet_address_list/wallet_address_list_h
 import 'package:cake_wallet/view_model/wallet_address_list/wallet_address_list_item.dart';
 import 'package:cake_wallet/view_model/wallet_address_list/wallet_address_list_view_model.dart';
 import 'package:cake_wallet/src/screens/receive/widgets/qr_widget.dart';
+import 'package:keyboard_actions/keyboard_actions.dart';
 
 class ReceivePage extends BasePage {
-  ReceivePage({this.addressListViewModel});
+  ReceivePage({this.addressListViewModel}) : _cryptoAmountFocus = FocusNode();
 
   final WalletAddressListViewModel addressListViewModel;
 
@@ -33,6 +35,8 @@ class ReceivePage extends BasePage {
   @override
   Color get titleColor => Colors.white;
 
+  final FocusNode _cryptoAmountFocus;
+
   @override
   Widget Function(BuildContext, Widget) get rootWrapper =>
       (BuildContext context, Widget scaffold) => Container(
@@ -67,7 +71,20 @@ class ReceivePage extends BasePage {
 
   @override
   Widget body(BuildContext context) {
-    return SingleChildScrollView(
+    return KeyboardActions(
+        config: KeyboardActionsConfig(
+            keyboardActionsPlatform: KeyboardActionsPlatform.IOS,
+            keyboardBarColor: isDarkTheme
+                ? Color.fromRGBO(48, 51, 60, 1.0)
+                : Color.fromRGBO(98, 98, 98, 1.0),
+            nextFocus: false,
+            actions: [
+              KeyboardActionsItem(
+                focusNode: _cryptoAmountFocus,
+                toolbarButtons: [(_) => KeyboardDoneButton()],
+              )
+            ]),
+        child: SingleChildScrollView(
           child: Column(
             children: <Widget>[
               Padding(
@@ -75,7 +92,7 @@ class ReceivePage extends BasePage {
                 child: QRWidget(
                     addressListViewModel: addressListViewModel,
                     isAmountFieldShow: true,
-            ),
+                    amountTextFieldFocusNode: _cryptoAmountFocus),
               ),
               Observer(
                   builder: (_) => ListView.separated(
@@ -99,7 +116,8 @@ class ReceivePage extends BasePage {
                               icon: Icon(
                                 Icons.arrow_forward_ios,
                                 size: 14,
-                            color: Theme.of(context).textTheme.display1.color,
+                                color:
+                                    Theme.of(context).textTheme.display1.color,
                               ));
                         }
 
@@ -111,7 +129,8 @@ class ReceivePage extends BasePage {
                               icon: Icon(
                                 Icons.add,
                                 size: 20,
-                            color: Theme.of(context).textTheme.display1.color,
+                                color:
+                                    Theme.of(context).textTheme.display1.color,
                               ));
                         }
 
@@ -136,7 +155,8 @@ class ReceivePage extends BasePage {
                                 isCurrent: isCurrent,
                                 backgroundColor: backgroundColor,
                                 textColor: textColor,
-                            onTap: (_) => addressListViewModel.setAddress(item),
+                                onTap: (_) =>
+                                    addressListViewModel.setAddress(item),
                                 onEdit: () => Navigator.of(context).pushNamed(
                                     Routes.newSubaddress,
                                     arguments: item));
@@ -154,6 +174,6 @@ class ReceivePage extends BasePage {
                       })),
             ],
           ),
-    );
+        ));
   }
 }

lib/src/screens/receive/widgets/qr_widget.dart

@@ -11,7 +11,9 @@ import 'package:cake_wallet/view_model/wallet_address_list/wallet_address_list_v
 
 class QRWidget extends StatelessWidget {
   QRWidget(
-      {@required this.addressListViewModel, this.isAmountFieldShow = false})
+      {@required this.addressListViewModel,
+      this.isAmountFieldShow = false,
+      this.amountTextFieldFocusNode})
       : amountController = TextEditingController(),
         _formKey = GlobalKey<FormState>() {
     amountController.addListener(() => addressListViewModel.amount =
@@ -21,6 +23,7 @@ class QRWidget extends StatelessWidget {
   final WalletAddressListViewModel addressListViewModel;
   final bool isAmountFieldShow;
   final TextEditingController amountController;
+  final FocusNode amountTextFieldFocusNode;
   final GlobalKey<FormState> _formKey;
 
   @override
@@ -68,6 +71,7 @@ class QRWidget extends StatelessWidget {
                         child: Form(
                             key: _formKey,
                             child: BaseTextFormField(
+                                focusNode: amountTextFieldFocusNode,
                                 controller: amountController,
                                 keyboardType: TextInputType.numberWithOptions(
                                     decimal: true),