Allow chaining of pairlists

freqtrade/pairlist/StaticPairList.py

@@ -5,6 +5,7 @@ Provides lists as configured in config.json
 
  """
 import logging
+from typing import List, Dict
 
 from freqtrade.pairlist.IPairList import IPairList
 
@@ -13,8 +14,8 @@ logger = logging.getLogger(__name__)
 
 class StaticPairList(IPairList):
 
-    def __init__(self, freqtrade, config: dict) -> None:
-        super().__init__(freqtrade, config)
+    def __init__(self, exchange, config, pairlistconfig: dict) -> None:
+        super().__init__(exchange, config, pairlistconfig)
 
     def short_desc(self) -> str:
         """
@@ -23,8 +24,12 @@ class StaticPairList(IPairList):
         """
         return f"{self.name}: {self.whitelist}"
 
-    def refresh_pairlist(self) -> None:
+    def filter_pairlist(self, pairlist: List[str], tickers: List[Dict]) -> List[str]:
         """
-        Refreshes pairlists and assigns them to self._whitelist and self._blacklist respectively
+        Filters and sorts pairlist and returns the whitelist again.
+        Called on each bot iteration - please use internal caching if necessary
+        :param pairlist: pairlist to filter or sort
+        :param tickers: Tickers (from exchange.get_tickers()). May be cached.
+        :return: new whitelist
         """
-        self._whitelist = self.validate_whitelist(self._config['exchange']['pair_whitelist'])
+        return self.validate_whitelist(self._config['exchange']['pair_whitelist'])