Merge branch 'develop' into order_creation

freqtrade/constants.py

@@ -67,6 +67,7 @@ CONF_SCHEMA = {
             },
             'minProperties': 1
         },
+        'amount_reserve_percent': {'type': 'number', 'minimum': 0.0, 'maximum': 0.5},
         'stoploss': {'type': 'number', 'maximum': 0, 'exclusiveMaximum': True},
         'trailing_stop': {'type': 'boolean'},
         'trailing_stop_positive': {'type': 'number', 'minimum': 0, 'maximum': 1},

freqtrade/exchange/__init__.py

@@ -160,7 +160,6 @@ class Exchange(object):
         return self._api.id
 
     def klines(self, pair_interval: Tuple[str, str], copy=True) -> DataFrame:
-        # create key tuple
         if pair_interval in self._klines:
             return self._klines[pair_interval].copy() if copy else self._klines[pair_interval]
         else:
@@ -502,14 +501,10 @@ class Exchange(object):
 
         input_coroutines = []
 
-        # Gather corotines to run
+        # Gather coroutines to run
         for pair, ticker_interval in set(pair_list):
-            # Calculating ticker interval in second
+            if (not ((pair, ticker_interval) in self._klines)
-            interval_in_sec = constants.TICKER_INTERVAL_MINUTES[ticker_interval] * 60
+                    or self._now_is_time_to_refresh(pair, ticker_interval)):
-
-            if not ((self._pairs_last_refresh_time.get((pair, ticker_interval), 0)
-                     + interval_in_sec) >= arrow.utcnow().timestamp
-                    and (pair, ticker_interval) in self._klines):
                 input_coroutines.append(self._async_get_candle_history(pair, ticker_interval))
             else:
                 logger.debug("Using cached ohlcv data for %s, %s ...", pair, ticker_interval)
@@ -533,6 +528,13 @@ class Exchange(object):
                 ticks, tick_interval, fill_missing=True)
         return tickers
 
+    def _now_is_time_to_refresh(self, pair: str, ticker_interval: str) -> bool:
+        # Calculating ticker interval in seconds
+        interval_in_sec = constants.TICKER_INTERVAL_MINUTES[ticker_interval] * 60
+
+        return not ((self._pairs_last_refresh_time.get((pair, ticker_interval), 0)
+                    + interval_in_sec) >= arrow.utcnow().timestamp)
+
     @retrier_async
     async def _async_get_candle_history(self, pair: str, tick_interval: str,
                                         since_ms: Optional[int] = None) -> Tuple[str, str, List]:

freqtrade/freqtradebot.py

@@ -17,7 +17,6 @@ from freqtrade import (DependencyException, OperationalException,
 from freqtrade.data.converter import order_book_to_dataframe
 from freqtrade.data.dataprovider import DataProvider
 from freqtrade.edge import Edge
-from freqtrade.exchange import Exchange
 from freqtrade.persistence import Trade
 from freqtrade.rpc import RPCManager, RPCMessageType
 from freqtrade.resolvers import ExchangeResolver, StrategyResolver, PairListResolver
@@ -57,12 +56,7 @@ class FreqtradeBot(object):
         self.rpc: RPCManager = RPCManager(self)
 
         exchange_name = self.config.get('exchange', {}).get('name', 'bittrex').title()
-        try:
+        self.exchange = ExchangeResolver(exchange_name, self.config).exchange
-            self.exchange = ExchangeResolver(exchange_name, self.config).exchange
-        except ImportError:
-            logger.info(
-                f"No {exchange_name} specific subclass found. Using the generic class instead.")
-            self.exchange = Exchange(self.config)
 
         self.wallets = Wallets(self.exchange)
         self.dataprovider = DataProvider(self.config, self.exchange)

freqtrade/resolvers/exchange_resolver.py

@@ -22,7 +22,12 @@ class ExchangeResolver(IResolver):
         Load the custom class from config parameter
         :param config: configuration dictionary or None
         """
-        self.exchange = self._load_exchange(exchange_name, kwargs={'config': config})
+        try:
+            self.exchange = self._load_exchange(exchange_name, kwargs={'config': config})
+        except ImportError:
+            logger.info(
+                f"No {exchange_name} specific subclass found. Using the generic class instead.")
+            self.exchange = Exchange(config)
 
     def _load_exchange(
             self, exchange_name: str, kwargs: dict) -> Exchange:

freqtrade/tests/exchange/test_exchange.py

@@ -13,7 +13,8 @@ from pandas import DataFrame
 
 from freqtrade import DependencyException, OperationalException, TemporaryError
 from freqtrade.exchange import API_RETRY_COUNT, Exchange
-from freqtrade.tests.conftest import get_patched_exchange, log_has
+from freqtrade.tests.conftest import get_patched_exchange, log_has, log_has_re
+from freqtrade.resolvers.exchange_resolver import ExchangeResolver
 
 
 # Source: https://stackoverflow.com/questions/29881236/how-to-mock-asyncio-coroutines
@@ -106,6 +107,23 @@ def test_init_exception(default_conf, mocker):
         Exchange(default_conf)
 
 
+def test_exchange_resolver(default_conf, mocker, caplog):
+    mocker.patch('freqtrade.exchange.Exchange._init_ccxt', MagicMock(return_value=MagicMock()))
+    mocker.patch('freqtrade.exchange.Exchange._load_async_markets', MagicMock())
+    mocker.patch('freqtrade.exchange.Exchange.validate_pairs', MagicMock())
+    mocker.patch('freqtrade.exchange.Exchange.validate_timeframes', MagicMock())
+    exchange = ExchangeResolver('Binance', default_conf).exchange
+    assert isinstance(exchange, Exchange)
+    assert log_has_re(r"No .* specific subclass found. Using the generic class instead.",
+                      caplog.record_tuples)
+    caplog.clear()
+
+    exchange = ExchangeResolver('Kraken', default_conf).exchange
+    assert isinstance(exchange, Exchange)
+    assert not log_has_re(r"No .* specific subclass found. Using the generic class instead.",
+                          caplog.record_tuples)
+
+
 def test_symbol_amount_prec(default_conf, mocker):
     '''
     Test rounds down to 4 Decimal places