Introduce InsufficientFundsError exception

freqtrade/exchange/ftx.py

@@ -5,6 +5,7 @@ from typing import Dict
 import ccxt
 
 from freqtrade.exceptions import (DDosProtection, ExchangeError,
+                                  InsufficientFundsError,
                                   InvalidOrderException, OperationalException,
                                   TemporaryError)
 from freqtrade.exchange import Exchange
@@ -61,7 +62,7 @@ class Ftx(Exchange):
                         'stop price: %s.', pair, stop_price)
             return order
         except ccxt.InsufficientFunds as e:
-            raise ExchangeError(
+            raise InsufficientFundsError(
                 f'Insufficient funds to create {ordertype} sell order on market {pair}. '
                 f'Tried to create stoploss with amount {amount} at stoploss {stop_price}. '
                 f'Message: {e}') from e