Merge pull request #2661 from freqtrade/wallet_dry

Introduce Dry-Run Wallet

freqtrade/exchange/exchange.py

@@ -18,7 +18,7 @@ from ccxt.base.decimal_to_precision import ROUND_DOWN, ROUND_UP
 from pandas import DataFrame
 
 from freqtrade import (DependencyException, InvalidOrderException,
-                       OperationalException, TemporaryError, constants)
+                       OperationalException, TemporaryError)
 from freqtrade.data.converter import parse_ticker_dataframe
 from freqtrade.exchange.common import BAD_EXCHANGES, retrier, retrier_async
 from freqtrade.misc import deep_merge_dicts
@@ -479,7 +479,7 @@ class Exchange:
     @retrier
     def get_balance(self, currency: str) -> float:
         if self._config['dry_run']:
-            return constants.DRY_RUN_WALLET
+            return self._config['dry_run_wallet']
 
         # ccxt exception is already handled by get_balances
         balances = self.get_balances()