From f3f6e9d365e06f3e82c533da460c7cf2f85540a8 Mon Sep 17 00:00:00 2001
From: Matthias <xmatthias@outlook.com>
Date: Sun, 13 Oct 2019 10:33:22 +0200
Subject: [PATCH] Allow skipping of exchange validation

---
 freqtrade/exchange/exchange.py           | 16 ++++++++--------
 freqtrade/resolvers/exchange_resolver.py |  7 ++++---
 freqtrade/utils.py                       |  2 +-
 3 files changed, 13 insertions(+), 12 deletions(-)

diff --git a/freqtrade/exchange/exchange.py b/freqtrade/exchange/exchange.py
index df7e5e2b4..8edbeaf50 100644
--- a/freqtrade/exchange/exchange.py
+++ b/freqtrade/exchange/exchange.py
@@ -155,7 +155,7 @@ class Exchange:
     }
     _ft_has: Dict = {}
 
-    def __init__(self, config: dict) -> None:
+    def __init__(self, config: dict, validate: bool = True) -> None:
         """
         Initializes this module with the given config,
         it does basic validation whether the specified exchange and pairs are valid.
@@ -209,13 +209,13 @@ class Exchange:
         # Converts the interval provided in minutes in config to seconds
         self.markets_refresh_interval: int = exchange_config.get(
             "markets_refresh_interval", 60) * 60
-        # Initial markets load
-        self._load_markets()
-
-        # Check if all pairs are available
-        self.validate_pairs(config['exchange']['pair_whitelist'])
-        self.validate_ordertypes(config.get('order_types', {}))
-        self.validate_order_time_in_force(config.get('order_time_in_force', {}))
+        if validate:
+            # Initial markets load
+            self._load_markets()
+            # Check if all pairs are available
+            self.validate_pairs(config['exchange']['pair_whitelist'])
+            self.validate_ordertypes(config.get('order_types', {}))
+            self.validate_order_time_in_force(config.get('order_time_in_force', {}))
 
     def __del__(self):
         """
diff --git a/freqtrade/resolvers/exchange_resolver.py b/freqtrade/resolvers/exchange_resolver.py
index 6fb12a65f..929ba197a 100644
--- a/freqtrade/resolvers/exchange_resolver.py
+++ b/freqtrade/resolvers/exchange_resolver.py
@@ -17,14 +17,15 @@ class ExchangeResolver(IResolver):
 
     __slots__ = ['exchange']
 
-    def __init__(self, exchange_name: str, config: dict) -> None:
+    def __init__(self, exchange_name: str, config: dict, validate: bool = True) -> None:
         """
         Load the custom class from config parameter
         :param config: configuration dictionary
         """
         exchange_name = exchange_name.title()
         try:
-            self.exchange = self._load_exchange(exchange_name, kwargs={'config': config})
+            self.exchange = self._load_exchange(exchange_name, kwargs={'config': config,
+                                                                       'validate': validate})
         except ImportError:
             logger.info(
                 f"No {exchange_name} specific subclass found. Using the generic class instead.")
@@ -43,7 +44,7 @@ class ExchangeResolver(IResolver):
         try:
             ex_class = getattr(exchanges, exchange_name)
 
-            exchange = ex_class(kwargs['config'])
+            exchange = ex_class(**kwargs)
             if exchange:
                 logger.info(f"Using resolved exchange '{exchange_name}'...")
                 return exchange
diff --git a/freqtrade/utils.py b/freqtrade/utils.py
index b3ff43aca..8f58c3158 100644
--- a/freqtrade/utils.py
+++ b/freqtrade/utils.py
@@ -110,7 +110,7 @@ def start_list_timeframes(args: Dict[str, Any]) -> None:
     config['ticker_interval'] = None
 
     # Init exchange
-    exchange = ExchangeResolver(config['exchange']['name'], config).exchange
+    exchange = ExchangeResolver(config['exchange']['name'], config, validate=False).exchange
 
     if args['print_one_column']:
         print('\n'.join(exchange.timeframes))