[Config] do not crash on missing crypto pairs config

Author: Guillaume De Saint Martin

octobot_trading/exchanges/config/exchange_config_data.py

@@ -180,7 +180,7 @@ def _set_config_traded_pairs(self):
     def _set_config_traded_pair(self, cryptocurrency, traded_symbol_pairs_set, existing_pairs):
         try:
             is_enabled = util.is_currency_enabled(self.config, cryptocurrency, True)
-            if self.config[constants.CONFIG_CRYPTO_CURRENCIES][cryptocurrency][constants.CONFIG_CRYPTO_PAIRS]:
+            if self.config[constants.CONFIG_CRYPTO_CURRENCIES][cryptocurrency].get(constants.CONFIG_CRYPTO_PAIRS, []):
                 if self.config[constants.CONFIG_CRYPTO_CURRENCIES][cryptocurrency][constants.CONFIG_CRYPTO_PAIRS] != \
                         constants.CONFIG_SYMBOLS_WILDCARD:
                     self._populate_non_wildcard_pairs(cryptocurrency, existing_pairs, is_enabled)

octobot_trading/util/config_util.py

@@ -57,7 +57,7 @@ def get_symbols(config, enabled_only) -> list:
             symbol
             for currency, crypto_currency_data in config[commons_constants.CONFIG_CRYPTO_CURRENCIES].items()
             if not enabled_only or is_currency_enabled(config, currency, True)
-            for symbol in crypto_currency_data[commons_constants.CONFIG_CRYPTO_PAIRS]
+            for symbol in crypto_currency_data.get(commons_constants.CONFIG_CRYPTO_PAIRS, [])
             if symbol != commons_constants.CONFIG_SYMBOLS_WILDCARD[0]
         ]
     return []