Improve wallets time handling

freqtrade/wallets.py

@@ -3,7 +3,7 @@
 
 import logging
 from copy import deepcopy
-from datetime import datetime
+from datetime import datetime, timedelta
 from typing import Dict, NamedTuple, Optional
 
 from freqtrade.constants import UNLIMITED_STAKE_AMOUNT, Config
@@ -12,6 +12,7 @@ from freqtrade.exceptions import DependencyException
 from freqtrade.exchange import Exchange
 from freqtrade.misc import safe_value_fallback
 from freqtrade.persistence import LocalTrade, Trade
+from freqtrade.util.datetime_helpers import dt_now
 
 
 logger = logging.getLogger(__name__)
@@ -42,7 +43,7 @@ class Wallets:
         self._wallets: Dict[str, Wallet] = {}
         self._positions: Dict[str, PositionWallet] = {}
         self.start_cap = config['dry_run_wallet']
-        self._last_wallet_refresh = 0
+        self._last_wallet_refresh: Optional[datetime] = None
         self.update()
 
     def get_free(self, currency: str) -> float:
@@ -165,15 +166,19 @@ class Wallets:
         for trading operations, the latest balance is needed.
         :param require_update: Allow skipping an update if balances were recently refreshed
         """
-        now = datetime.now().timestamp()
+        now = dt_now()
-        if (require_update or (self._last_wallet_refresh + 3600 < now)):
+        if (
+            require_update
+            or self._last_wallet_refresh is None
+            or (self._last_wallet_refresh + timedelta(seconds=3600) < now)
+        ):
             if (not self._config['dry_run'] or self._config.get('runmode') == RunMode.LIVE):
                 self._update_live()
             else:
                 self._update_dry()
             if self._log:
                 logger.info('Wallets synced.')
-            self._last_wallet_refresh = datetime.now().timestamp()
+            self._last_wallet_refresh = dt_now()
 
     def get_all_balances(self) -> Dict[str, Wallet]:
         return self._wallets