Add pop to inform if payment is ok or not

lib/models/history.dart

@@ -50,20 +50,14 @@ class HistoryProvider with ChangeNotifier {
     return barcode;
   }
 
-  void pay(BuildContext context, String pinCode) {
+  Future<String> pay(BuildContext context, String pinCode) async {
     // MyWalletsProvider _myWalletProvider = MyWalletsProvider();
-    String dewif =
-        File(walletsDirectory.path + '/${defaultWallet.chest}/wallet.dewif')
-            .readAsLinesSync()[0];
+    List dewifList = await File(
+            walletsDirectory.path + '/${defaultWallet.chest}/wallet.dewif')
+        .readAsLines();
+    String dewif = dewifList[0];
     try {
-      print(defaultWallet.derivation);
-      print(payAmount.text);
-      print(payComment.text);
-      print(dewif);
-      print(endPointGVA);
-      print(pinCode);
-      print(pubkey);
-      DubpRust.simplePaymentFromTransparentAccount(
+      await DubpRust.simplePaymentFromTransparentAccount(
           accountIndex: defaultWallet.derivation,
           amount: double.parse(payAmount.text),
           txComment: payComment.text,
@@ -71,9 +65,11 @@ class HistoryProvider with ChangeNotifier {
           gvaEndpoint: endPointGVA,
           secretCode: pinCode,
           recipient: pubkey);
+      return "Success";
     } catch (e) {
       log.e("ERROR DUBP PAYMENTS");
       log.e(e);
+      return "Payments errors: $e";
     }
   }
 
@@ -137,6 +133,7 @@ class HistoryProvider with ChangeNotifier {
     return pubkeyShort;
   }
 
+// poka: Do99s6wQR2JLfhirPdpAERSjNbmjjECzGxHNJMiNKT3P
 // Pi: D2meevcAHFTS2gQMvmRW5Hzi25jDdikk4nC4u1FkwRaU         // For debug
 // Boris: JE6mkuzSpT3ePciCPRTpuMT9fqPUVVLJz2618d33p7tn
 // Matograine portefeuille: 9p5nHsES6xujFR7pw2yGy4PLKKHgWsMvsDHaHF64Uj25.

lib/screens/myWallets/unlockingWallet.dart

@@ -24,6 +24,7 @@ class UnlockingWallet extends StatelessWidget {
   bool hasError = false;
   var pinColor = Color(0xffF9F9F1);
   var walletPin = '';
+  String resultPay;
 
   Future<NewWallet> get badWallet => null;
 
@@ -148,7 +149,9 @@ class UnlockingWallet extends StatelessWidget {
                   Navigator.pushNamed(formKey.currentContext, '/mywallets');
                 } else if (action == "pay") {
                   print("Go payments");
-                  _historyProvider.pay(context, _pin.toUpperCase());
+                  resultPay =
+                      await _historyProvider.pay(context, _pin.toUpperCase());
+                  await _paymentsResult(context);
                 }
               }
             },
@@ -160,4 +163,30 @@ class UnlockingWallet extends StatelessWidget {
           )),
     );
   }
+
+  Future<bool> _paymentsResult(context) {
+    return showDialog<bool>(
+      context: context,
+      barrierDismissible: true, // user must tap button!
+      builder: (BuildContext context) {
+        return AlertDialog(
+          title: Text(resultPay == "Success"
+              ? 'Paiement effecuté avec succès !'
+              : "Une erreur s'est produite lors du paiement"),
+          content: SingleChildScrollView(child: Text('')),
+          actions: <Widget>[
+            TextButton(
+              child: Text("OK"),
+              onPressed: () {
+                Navigator.popUntil(
+                  context,
+                  ModalRoute.withName('/'),
+                );
+              },
+            ),
+          ],
+        );
+      },
+    );
+  }
 }