Parse configuration from json

config/README.md

@@ -0,0 +1,3 @@
+# Config Examples
+
+This directory contains configuration examples.

config/example_btc_monthly_savings.json

@@ -0,0 +1,9 @@
+{
+    "__comment": "This configuration buys 100 USD worth Bitcoin ever 30 days.",
+    "input_asset": "USDT",
+    "output_asset": "BTC",
+    "input_amount_low": 100,
+    "input_amount_high": 100,
+    "interval_minutes_low": 43200,
+    "interval_minutes_high": 43200
+}

config/example_mpc_for_usdt_mini.json

@@ -0,0 +1,10 @@
+{
+    "__comment1": "This configuration sells a small amount of MPC tokens",
+    "__comment2": "for USDT every minute. Mainly for testing",
+    "input_asset": "MPC",
+    "output_asset": "USDT",
+    "input_amount_low": 0.5,
+    "input_amount_high": 1.5,
+    "interval_minutes_low": 1,
+    "interval_minutes_high": 2
+}

crypto_seller/__init__.py

@@ -65,13 +65,13 @@ most mature on the danish market, and does support KuCoin.
 
 ## TODO
 
-- [ ] Parse configuration from json.
 - [ ] Ensure that a failure during selling results in a safe winding down of the system.
       * Catch runtime errors when selling
       * Show errors to log.
       * Stop loop and exit with results, and error indicator.
 - [ ] Document configuration
 - [ ] Document code auditing
+- [X] Parse configuration from json.
 - [X] Ensure sell time is included in order details
 - [X] Log all trades to CSV file.
 - [X] Collect information during the run and output after run

crypto_seller/__main__.py

@@ -1,6 +1,7 @@
 import argparse
 import datetime
 import logging
+import json
 import logging.handlers
 import time
 from decimal import Decimal
@@ -18,12 +19,6 @@ from . import (
 )
 from . import logger as module_logger
 
-try:
-    import logging_color
-    logging_color.monkey_patch()
-except ImportError:
-    pass
-
 logger = logging.getLogger(__name__)
 
 ################################################################################
@@ -47,7 +42,14 @@ def setup_logging():
         ),
     )
 
-    logging.basicConfig(handlers=[logging.StreamHandler(), file_handler])
+    stream_handler = logging.StreamHandler()
+    try:
+        import logging_color
+        stream_handler  = logging_color.ColorStreamHandler()
+    except ImportError:
+        pass
+
+    logging.basicConfig(handlers=[stream_handler, file_handler])
 
     logger.setLevel('INFO')
     module_logger.setLevel('INFO')
@@ -58,8 +60,36 @@ Sells financial assets from an online account.
 """.strip()
 
 
+def load_config(config_path: Path) -> AutoSellConfig:
+    logger.info('Loading configuration')
+
+    seller_backend = fin_depo.defi_kucoin.KucoinDepoFetcher(
+        kucoin_secret=config.KUCOIN_SECRET,
+        kucoin_key=config.KUCOIN_KEY,
+        kucoin_pass=config.KUCOIN_PASS,
+        allow_trades = True,
+    )
+
+    with open(config_path) as f:
+        json_config = json.load(f)
+
+    return AutoSellConfig(
+        input_amount_range=(Decimal(json_config['input_amount_low']),
+                            Decimal(json_config['input_amount_high'])),
+        interval_range=(datetime.timedelta(minutes=json_config['interval_minutes_low']),
+                        datetime.timedelta(minutes=json_config['interval_minutes_high'])),
+        input_asset=fin_defs.WELL_KNOWN_SYMBOLS[json_config['input_asset']],
+        output_asset=fin_defs.WELL_KNOWN_SYMBOLS[json_config['output_asset']],
+        exit_when_empty=True,
+        seller=seller_backend,
+        sleep=time.sleep,
+        log_order_to_csv=order_csv.CsvFileLogger(PATH_TRADES_FILE),
+    )
+
+
 def parse_args():
     parser = argparse.ArgumentParser('crypto_seller', description=CLI_DESCRIPTION)
+    parser.add_argument('--config', type=Path, dest="config_file", required=True)
     return parser.parse_args()
 
 
@@ -67,26 +97,10 @@ def main():
     """Initializes the program."""
     setup_logging()
 
+    logger.info('Initializing crypto_seller')
     args = parse_args()
 
-    logger.info('Initializing crypto_seller')
-
-    seller_backend = fin_depo.defi_kucoin.KucoinDepoFetcher(
-        kucoin_secret=config.KUCOIN_SECRET,
-        kucoin_key=config.KUCOIN_KEY,
-        kucoin_pass=config.KUCOIN_PASS,
-    )
-
-    auto_sell_config = AutoSellConfig(
-        input_amount_range=(Decimal('0.5'), Decimal('1')),
-        interval_range=(datetime.timedelta(seconds=2), datetime.timedelta(seconds=6)),
-        input_asset=fin_defs.MPC,
-        output_asset=fin_defs.USDT,
-        exit_when_empty=True,
-        seller=seller_backend,
-        sleep=time.sleep,
-        log_order_to_csv=order_csv.CsvFileLogger(PATH_TRADES_FILE),
-    )
+    auto_sell_config = load_config(args.config_file)
     results = run_auto_sell(auto_sell_config)
     logging.info('Sell-offs complete')
     log_results(results)