Merge branch 'develop' into feat/short

freqtrade/wallets.py

@@ -3,7 +3,7 @@
 
 import logging
 from copy import deepcopy
-from typing import Any, Dict, NamedTuple
+from typing import Any, Dict, NamedTuple, Optional
 
 import arrow
 
@@ -211,7 +211,7 @@ class Wallets:
 
         return stake_amount
 
-    def get_trade_stake_amount(self, pair: str, edge=None) -> float:
+    def get_trade_stake_amount(self, pair: str, edge=None, update: bool = True) -> float:
         """
         Calculate stake amount for the trade
         :return: float: Stake amount
@@ -219,7 +219,8 @@ class Wallets:
         """
         stake_amount: float
         # Ensure wallets are uptodate.
-        self.update()
+        if update:
+            self.update()
         val_tied_up = Trade.total_open_trades_stakes()
         available_amount = self.get_available_stake_amount()
 
@@ -238,14 +239,15 @@ class Wallets:
 
         return self._check_available_stake_amount(stake_amount, available_amount)
 
-    def validate_stake_amount(self, pair, stake_amount, min_stake_amount, max_stake_amount):
+    def validate_stake_amount(self, pair: str, stake_amount: Optional[float],
+                              min_stake_amount: Optional[float], max_stake_amount: float):
         if not stake_amount:
             logger.debug(f"Stake amount is {stake_amount}, ignoring possible trade for {pair}.")
             return 0
 
         max_stake_amount = min(max_stake_amount, self.get_available_stake_amount())
 
-        if min_stake_amount > max_stake_amount:
+        if min_stake_amount is not None and min_stake_amount > max_stake_amount:
             if self._log:
                 logger.warning("Minimum stake amount > available balance.")
             return 0