list-exchanges subcommand added

freqtrade/arguments.py

@@ -335,12 +335,25 @@ class Arguments(object):
             metavar='INT',
         )
 
+    @staticmethod
+    def list_exchanges_options(parser: argparse.ArgumentParser) -> None:
+        """
+        Parses given arguments for the list-exchanges command.
+        """
+        parser.add_argument(
+            '-1',
+            help='Print exchanges in one column',
+            action='store_true',
+            dest='print_one_column',
+        )
+
     def _build_subcommands(self) -> None:
         """
         Builds and attaches all subcommands
         :return: None
         """
         from freqtrade.optimize import start_backtesting, start_hyperopt, start_edge
+        from freqtrade.utils import start_list_exchanges
 
         subparsers = self.parser.add_subparsers(dest='subparser')
 
@@ -362,6 +375,11 @@ class Arguments(object):
         self.optimizer_shared_options(hyperopt_cmd)
         self.hyperopt_options(hyperopt_cmd)
 
+        # Add list-exchanges subcommand
+        list_exchanges_cmd = subparsers.add_parser('list-exchanges', help='List known exchanges.')
+        list_exchanges_cmd.set_defaults(func=start_list_exchanges)
+        self.list_exchanges_options(list_exchanges_cmd)
+
     @staticmethod
     def parse_timerange(text: Optional[str]) -> TimeRange:
         """

freqtrade/utils.py

@@ -0,0 +1,44 @@
+import logging
+from argparse import Namespace
+from typing import Any, Dict
+
+from freqtrade.configuration import Configuration
+from freqtrade.exchange import supported_exchanges
+from freqtrade.state import RunMode
+
+
+logger = logging.getLogger(__name__)
+
+
+def setup_configuration(args: Namespace, method: RunMode) -> Dict[str, Any]:
+    """
+    Prepare the configuration for the Hyperopt module
+    :param args: Cli args from Arguments()
+    :return: Configuration
+    """
+    configuration = Configuration(args, method)
+    config = configuration.load_config()
+
+    # Ensure we do not use Exchange credentials
+    config['exchange']['key'] = ''
+    config['exchange']['secret'] = ''
+
+    return config
+
+
+def start_list_exchanges(args: Namespace) -> None:
+    """
+    Start listing known exchanges
+    :param args: Cli args from Arguments()
+    :return: None
+    """
+
+    # Initialize configuration
+    config = setup_configuration(args, RunMode.OTHER)
+
+    logger.debug('Starting freqtrade in cli-util mode')
+
+    if args.print_one_column:
+        print('\n'.join(supported_exchanges()))
+    else:
+        print(f"Supported exchanges: {', '.join(supported_exchanges())}")