Check if block doc is correct

res/ui/transactions_tab.ui

@@ -15,7 +15,7 @@
   </property>
   <layout class="QVBoxLayout" name="verticalLayout">
    <item>
-    <widget class="QGroupBox" name="groupBox_2">
+    <widget class="QGroupBox" name="groupbox_balance">
      <property name="title">
       <string>Balance</string>
      </property>

src/cutecoin/core/txhistory.py

@@ -163,16 +163,21 @@ class TxHistory():
 
     @asyncio.coroutine
     def _parse_block(self, community, block_number, received_list, current_block, txmax):
-        block = yield from community.bma_access.future_request(qtbma.blockchain.Block,
-                                  req_args={'number': block_number})
-        signed_raw = "{0}{1}\n".format(block['raw'],
-                                       block['signature'])
-        transfers = []
-        try:
-            block_doc = Block.from_signed_raw(signed_raw)
-        except:
-            logging.debug("Error in {0}".format(block_number))
-            raise
+        block = None
+        tries = 0
+        while block is None and tries < 3:
+            block = yield from community.bma_access.future_request(qtbma.blockchain.Block,
+                                      req_args={'number': block_number})
+            signed_raw = "{0}{1}\n".format(block['raw'],
+                                           block['signature'])
+            transfers = []
+            try:
+                block_doc = Block.from_signed_raw(signed_raw)
+            except:
+                logging.debug("Error in {0}".format(block_number))
+                block = None
+                tries += 1
+
         for (txid, tx) in enumerate(block_doc.transactions):
             transfer = yield from self._parse_transaction(community, tx, block_number,
                                     block_doc.mediantime, received_list,

src/cutecoin/gui/transactions_tab.py

@@ -14,6 +14,7 @@ from ..core.registry import Identity
 from ..tools.decorators import asyncify, once_at_a_time, cancel_once_task
 from .transfer import TransferMoneyDialog
 from . import toast
+from .busy import Busy
 
 import logging
 import asyncio
@@ -39,6 +40,8 @@ class TransactionsTabWidget(QWidget, Ui_transactionsTabWidget):
         self.account = None
         self.community = None
         self.password_asker = None
+        self.busy_balance = Busy(self.groupbox_balance)
+        self.busy_balance.hide()
 
         ts_from = self.date_from.dateTime().toTime_t()
         ts_to = self.date_to.dateTime().toTime_t()
@@ -127,6 +130,7 @@ class TransactionsTabWidget(QWidget, Ui_transactionsTabWidget):
     @asyncify
     @asyncio.coroutine
     def refresh_balance(self):
+        self.busy_balance.show()
         amount = yield from self.app.current_account.amount(self.community)
         localized_amount = yield from self.app.current_account.current_ref(amount, self.community,
                                                                            self.app).localized(units=True,
@@ -139,6 +143,7 @@ class TransactionsTabWidget(QWidget, Ui_transactionsTabWidget):
                 localized_amount
             )
         )
+        self.busy_balance.hide()
 
     @once_at_a_time
     @asyncify
@@ -294,6 +299,10 @@ QMessageBox.Ok | QMessageBox.Cancel)
 
             self.refresh_balance()
 
+    def resizeEvent(self, event):
+        self.busy_balance.resize(event.size())
+        super().resizeEvent(event)
+
     def changeEvent(self, event):
         """
         Intercepte LanguageChange event to translate UI