added fix for insufficient funds error from bitrex, looking at possibility to test it it

freqtrade/__init__.py

@@ -14,3 +14,10 @@ class OperationalException(BaseException):
     Requires manual intervention.
     This happens when an exchange returns an unexpected error during runtime.
     """
+
+
+class NotEnoughFundsExeption(BaseException):
+    """
+    This happens when the exchange reports that not enough funds where available. We do not want to stop
+    the bot in this case and just keep it going and suppress this message
+    """

freqtrade/exchange/bittrex.py

@@ -5,7 +5,7 @@ from bittrex.bittrex import API_V1_1, API_V2_0
 from bittrex.bittrex import Bittrex as _Bittrex
 from requests.exceptions import ContentDecodingError
 
-from freqtrade import OperationalException
+from freqtrade import OperationalException, NotEnoughFundsExeption
 from freqtrade.exchange.interface import Exchange
 
 logger = logging.getLogger(__name__)
@@ -63,11 +63,19 @@ class Bittrex(Exchange):
         data = _API.buy_limit(pair.replace('_', '-'), amount, rate)
         if not data['success']:
             Bittrex._validate_response(data)
-            raise OperationalException('{message} params=({pair}, {rate}, {amount})'.format(
-                message=data['message'],
-                pair=pair,
-                rate=rate,
-                amount=amount))
+
+            if data['message'] == "INSUFFICIENT_FUNDS":
+                raise NotEnoughFundsExeption('{message} params=({pair}, {rate}, {amount})'.format(
+                    message=data['message'],
+                    pair=pair,
+                    rate=rate,
+                    amount=amount))
+            else:
+                raise OperationalException('{message} params=({pair}, {rate}, {amount})'.format(
+                    message=data['message'],
+                    pair=pair,
+                    rate=rate,
+                    amount=amount))
         return data['result']['uuid']
 
     def sell(self, pair: str, rate: float, amount: float) -> str:

freqtrade/freqtradebot.py

@@ -15,8 +15,8 @@ import requests
 from cachetools import cached, TTLCache
 
 from freqtrade import (
-    DependencyException, OperationalException, exchange, persistence, __version__
-)
+    DependencyException, OperationalException, exchange, persistence, __version__,
+    NotEnoughFundsExeption)
 from freqtrade.analyze import Analyze
 from freqtrade import constants
 from freqtrade.fiat_convert import CryptoToFiatConverter
@@ -24,7 +24,6 @@ from freqtrade.persistence import Trade
 from freqtrade.rpc.rpc_manager import RPCManager
 from freqtrade.state import State
 
-
 logger = logging.getLogger(__name__)
 
 
@@ -166,7 +165,11 @@ class FreqtradeBot(object):
 
             # Then looking for buy opportunities
             if len(trades) < self.config['max_open_trades']:
-                state_changed = self.process_maybe_execute_buy()
+                try:
+                    state_changed = self.process_maybe_execute_buy()
+                except NotEnoughFundsExeption:
+                    logger.warning('insufficient funds to execute this buy order, ignoring it!')
+                    state_changed = False
 
             if 'unfilledtimeout' in self.config:
                 # Check and handle any timed out open orders
@@ -176,10 +179,11 @@ class FreqtradeBot(object):
         except (requests.exceptions.RequestException, json.JSONDecodeError) as error:
             logger.warning('%s, retrying in 30 seconds...', error)
             time.sleep(constants.RETRY_TIMEOUT)
+
         except OperationalException:
             self.rpc.send_msg(
                 '*Status:* OperationalException:\n```\n{traceback}```{hint}'
-                .format(
+                    .format(
                     traceback=traceback.format_exc(),
                     hint='Issue `/start` if you think it is safe to restart.'
                 )
@@ -301,7 +305,7 @@ class FreqtradeBot(object):
         # Create trade entity and return
         self.rpc.send_msg(
             '*{}:* Buying [{}]({}) with limit `{:.8f} ({:.6f} {}, {:.3f} {})` '
-            .format(
+                .format(
                 exchange.get_name().upper(),
                 pair.replace('_', '/'),
                 exchange.get_pair_detail_url(pair),
@@ -484,15 +488,15 @@ class FreqtradeBot(object):
                   "*Current Rate:* `{current_rate:.8f}`\n" \
                   "*Profit:* `{profit:.2f}%`" \
                   "".format(
-                      exchange=trade.exchange,
-                      pair=trade.pair,
-                      pair_url=exchange.get_pair_detail_url(trade.pair),
-                      limit=limit,
-                      open_rate=trade.open_rate,
-                      current_rate=current_rate,
-                      amount=round(trade.amount, 8),
-                      profit=round(profit * 100, 2),
-                  )
+            exchange=trade.exchange,
+            pair=trade.pair,
+            pair_url=exchange.get_pair_detail_url(trade.pair),
+            limit=limit,
+            open_rate=trade.open_rate,
+            current_rate=current_rate,
+            amount=round(trade.amount, 8),
+            profit=round(profit * 100, 2),
+        )
 
         # For regular case, when the configuration exists
         if 'stake_currency' in self.config and 'fiat_display_currency' in self.config:
@@ -505,13 +509,13 @@ class FreqtradeBot(object):
             message += '` ({gain}: {profit_percent:.2f}%, {profit_coin:.8f} {coin}`' \
                        '` / {profit_fiat:.3f} {fiat})`' \
                        ''.format(
-                           gain="profit" if fmt_exp_profit > 0 else "loss",
-                           profit_percent=fmt_exp_profit,
-                           profit_coin=profit_trade,
-                           coin=self.config['stake_currency'],
-                           profit_fiat=profit_fiat,
-                           fiat=self.config['fiat_display_currency'],
-                       )
+                gain="profit" if fmt_exp_profit > 0 else "loss",
+                profit_percent=fmt_exp_profit,
+                profit_coin=profit_trade,
+                coin=self.config['stake_currency'],
+                profit_fiat=profit_fiat,
+                fiat=self.config['fiat_display_currency'],
+            )
         # Because telegram._forcesell does not have the configuration
         # Ignore the FIAT value and does not show the stake_currency as well
         else: