[enh] explicit var names in services/blockchain.py

src/sakia/services/blockchain.py

@@ -64,22 +64,22 @@ class BlockchainService(QObject):
             try:
                 self._update_lock = True
                 self.app.refresh_started.emit()
-                start = self._blockchain_processor.block_number_30days_ago(
+                start_number = self._blockchain_processor.block_number_30days_ago(
                     self.currency, network_blockstamp
                 )
-                if self.current_buid().number > start:
-                    start = self.current_buid().number + 1
+                if self.current_buid().number > start_number:
+                    start_number = self.current_buid().number + 1
                 else:
                     connections = self._connections_processor.connections_to(
                         self.currency
                     )
-                    time_30days_ago = self._blockchain_processor.rounded_timestamp(
-                        self.currency, start
+                    end_time = self._blockchain_processor.rounded_timestamp(
+                        self.currency, start_number
                     )
                     self._transactions_service.insert_stopline(
-                        connections, start, time_30days_ago
+                        connections, start_number, end_time
                     )
-                self._logger.debug("Parsing from {0}".format(start))
+                self._logger.debug("Parsing from {0}".format(start_number))
                 connections = self._connections_processor.connections_to(self.currency)
                 await self._identities_service.refresh()
                 (
@@ -87,7 +87,7 @@ class BlockchainService(QObject):
                     new_tx,
                     new_dividends,
                 ) = await self._transactions_service.handle_new_blocks(
-                    connections, start, network_blockstamp.number
+                    connections, start_number, network_blockstamp.number
                 )
                 await self._sources_service.refresh_sources(connections)