Host-customized fork of https://github.com/tecnovert/basicswap/
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615 lines
29 KiB
615 lines
29 KiB
#!/usr/bin/env python |
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# -*- coding: utf-8 -*- |
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# Copyright (c) 2023 tecnovert |
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# Distributed under the MIT software license, see the accompanying |
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# file LICENSE or http://www.opensource.org/licenses/mit-license.php. |
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""" |
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Create offers |
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""" |
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__version__ = '0.2' |
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import os |
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import json |
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import time |
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import random |
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import shutil |
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import signal |
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import urllib |
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import logging |
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import argparse |
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import threading |
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from urllib.request import urlopen |
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delay_event = threading.Event() |
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DEFAULT_CONFIG_FILE: str = 'createoffers.json' |
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DEFAULT_STATE_FILE: str = 'createoffers_state.json' |
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def post_req(url: str, json_data=None): |
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req = urllib.request.Request(url, headers={'User-Agent': 'Mozilla/5.0'}) |
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if json_data: |
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req.add_header('Content-Type', 'application/json; charset=utf-8') |
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post_bytes = json.dumps(json_data).encode('utf-8') |
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req.add_header('Content-Length', len(post_bytes)) |
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else: |
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post_bytes = None |
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return urlopen(req, data=post_bytes, timeout=300).read() |
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def make_json_api_func(host: str, port: int): |
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host = host |
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port = port |
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def api_func(path=None, json_data=None, timeout=300): |
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nonlocal host, port |
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url = f'http://{host}:{port}/json' |
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if path is not None: |
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url += '/' + path |
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if json_data is not None: |
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return json.loads(post_req(url, json_data)) |
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response = urlopen(url, timeout=300).read() |
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return json.loads(response) |
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return api_func |
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def signal_handler(sig, frame) -> None: |
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logging.info('Signal {} detected.'.format(sig)) |
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delay_event.set() |
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def findCoin(coin: str, known_coins) -> str: |
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for known_coin in known_coins: |
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if known_coin['name'].lower() == coin.lower() or known_coin['ticker'].lower() == coin.lower(): |
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if known_coin['active'] is False: |
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raise ValueError(f'Inactive coin {coin}') |
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return known_coin['name'] |
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raise ValueError(f'Unknown coin {coin}') |
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def readConfig(args, known_coins): |
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config_path: str = args.configfile |
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num_changes: int = 0 |
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with open(config_path) as fs: |
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config = json.load(fs) |
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if 'offers' not in config: |
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config['offers'] = [] |
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if 'bids' not in config: |
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config['bids'] = [] |
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if 'stealthex' not in config: |
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config['stealthex'] = [] |
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if 'min_seconds_between_offers' not in config: |
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config['min_seconds_between_offers'] = 60 |
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print('Set min_seconds_between_offers', config['min_seconds_between_offers']) |
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num_changes += 1 |
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if 'max_seconds_between_offers' not in config: |
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config['max_seconds_between_offers'] = config['min_seconds_between_offers'] * 4 |
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print('Set max_seconds_between_offers', config['max_seconds_between_offers']) |
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num_changes += 1 |
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if 'min_seconds_between_bids' not in config: |
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config['min_seconds_between_bids'] = 60 |
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print('Set min_seconds_between_bids', config['min_seconds_between_bids']) |
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num_changes += 1 |
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if 'max_seconds_between_bids' not in config: |
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config['max_seconds_between_bids'] = config['min_seconds_between_bids'] * 4 |
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print('Set max_seconds_between_bids', config['max_seconds_between_bids']) |
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num_changes += 1 |
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offer_templates = config['offers'] |
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offer_templates_map = {} |
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num_enabled = 0 |
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for i, offer_template in enumerate(offer_templates): |
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num_enabled += 1 if offer_template.get('enabled', True) else 0 |
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if 'name' not in offer_template: |
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print('Naming offer template', i) |
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offer_template['name'] = f'Offer {i}' |
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num_changes += 1 |
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if offer_template['name'] in offer_templates_map: |
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print('Renaming offer template', offer_template['name']) |
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original_name = offer_template['name'] |
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offset = 2 |
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while f'{original_name}_{offset}' in offer_templates_map: |
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offset += 1 |
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offer_template['name'] = f'{original_name}_{offset}' |
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num_changes += 1 |
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offer_templates_map[offer_template['name']] = offer_template |
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if offer_template.get('min_coin_from_amt', 0) < offer_template['amount']: |
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print('Setting min_coin_from_amt for', offer_template['name']) |
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offer_template['min_coin_from_amt'] = offer_template['amount'] |
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num_changes += 1 |
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if 'address' not in offer_template: |
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print('Setting address to auto for offer', offer_template['name']) |
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offer_template['address'] = 'auto' |
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num_changes += 1 |
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if 'ratetweakpercent' not in offer_template: |
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print('Setting ratetweakpercent to 0 for offer', offer_template['name']) |
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offer_template['ratetweakpercent'] = 0 |
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num_changes += 1 |
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if 'amount_variable' not in offer_template: |
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print('Setting amount_variable to True for offer', offer_template['name']) |
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offer_template['amount_variable'] = True |
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num_changes += 1 |
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if offer_template.get('enabled', True) is False: |
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continue |
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offer_template['coin_from'] = findCoin(offer_template['coin_from'], known_coins) |
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offer_template['coin_to'] = findCoin(offer_template['coin_to'], known_coins) |
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config['num_enabled_offers'] = num_enabled |
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bid_templates = config['bids'] |
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bid_templates_map = {} |
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num_enabled = 0 |
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for i, bid_template in enumerate(bid_templates): |
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num_enabled += 1 if bid_template.get('enabled', True) else 0 |
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if 'name' not in bid_template: |
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print('Naming bid template', i) |
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bid_template['name'] = f'Bid {i}' |
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num_changes += 1 |
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if bid_template['name'] in bid_templates_map: |
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print('Renaming bid template', bid_template['name']) |
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original_name = bid_template['name'] |
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offset = 2 |
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while f'{original_name}_{offset}' in bid_templates_map: |
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offset += 1 |
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bid_template['name'] = f'{original_name}_{offset}' |
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num_changes += 1 |
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bid_templates_map[bid_template['name']] = bid_template |
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if bid_template.get('min_swap_amount', 0.0) < 0.00001: |
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print('Setting min_swap_amount for bid template', bid_template['name']) |
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bid_template['min_swap_amount'] = 0.00001 |
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if 'address' not in bid_template: |
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print('Setting address to auto for bid', bid_template['name']) |
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bid_template['address'] = 'auto' |
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num_changes += 1 |
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if bid_template.get('enabled', True) is False: |
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continue |
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bid_template['coin_from'] = findCoin(bid_template['coin_from'], known_coins) |
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bid_template['coin_to'] = findCoin(bid_template['coin_to'], known_coins) |
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config['num_enabled_bids'] = num_enabled |
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num_enabled = 0 |
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stealthex_swaps = config['stealthex'] |
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for i, swap in enumerate(stealthex_swaps): |
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num_enabled += 1 if swap.get('enabled', True) else 0 |
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if swap.get('enabled', True) is False: |
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continue |
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swap['coin_from'] = findCoin(swap['coin_from'], known_coins) |
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config['num_enabled_swaps'] = num_enabled |
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if num_changes > 0: |
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shutil.copyfile(config_path, config_path + '.last') |
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with open(config_path, 'w') as fp: |
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json.dump(config, fp, indent=4) |
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return config |
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def write_state(statefile, script_state): |
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if os.path.exists(statefile): |
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shutil.copyfile(statefile, statefile + '.last') |
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with open(statefile, 'w') as fp: |
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json.dump(script_state, fp, indent=4) |
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def main(): |
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parser = argparse.ArgumentParser(description=__doc__) |
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parser.add_argument('-v', '--version', action='version', |
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version='%(prog)s {version}'.format(version=__version__)) |
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parser.add_argument('--host', dest='host', help='RPC host (default=127.0.0.1)', type=str, default='127.0.0.1', required=False) |
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parser.add_argument('--port', dest='port', help='RPC port (default=12700)', type=int, default=12700, required=False) |
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parser.add_argument('--oneshot', dest='oneshot', help='Exit after one iteration (default=false)', required=False, action='store_true') |
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parser.add_argument('--debug', dest='debug', help='Print extra debug messages (default=false)', required=False, action='store_true') |
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parser.add_argument('--configfile', dest='configfile', help=f'config file path (default={DEFAULT_CONFIG_FILE})', type=str, default=DEFAULT_CONFIG_FILE, required=False) |
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parser.add_argument('--statefile', dest='statefile', help=f'state file path (default={DEFAULT_STATE_FILE})', type=str, default=DEFAULT_STATE_FILE, required=False) |
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args = parser.parse_args() |
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read_json_api = make_json_api_func(args.host, args.port) |
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if not os.path.exists(args.configfile): |
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raise ValueError(f'Config file "{args.configfile}" not found.') |
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known_coins = read_json_api('coins') |
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coins_map = {} |
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for known_coin in known_coins: |
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coins_map[known_coin['name']] = known_coin |
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script_state = {} |
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if os.path.exists(args.statefile): |
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with open(args.statefile) as fs: |
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script_state = json.load(fs) |
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signal.signal(signal.SIGINT, signal_handler) |
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while not delay_event.is_set(): |
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# Read config each iteration so they can be modified without restarting |
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config = readConfig(args, known_coins) |
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offer_templates = config['offers'] |
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random.shuffle(offer_templates) |
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bid_templates = config['bids'] |
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random.shuffle(bid_templates) |
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stealthex_swaps = config['stealthex'] |
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random.shuffle(bid_templates) |
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# override wallet api calls for testing |
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if 'wallet_port_override' in config: |
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wallet_api_port = int(config['wallet_port_override']) |
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print(f'Overriding wallet api port: {wallet_api_port}') |
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read_json_api_wallet = make_json_api_func(args.host, wallet_api_port) |
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else: |
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read_json_api_wallet = read_json_api |
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try: |
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sent_offers = read_json_api('sentoffers', {'active': 'active'}) |
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if args.debug and len(offer_templates) > 0: |
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print('Processing {} offer template{}'.format(config['num_enabled_offers'], 's' if config['num_enabled_offers'] != 1 else '')) |
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for offer_template in offer_templates: |
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if offer_template.get('enabled', True) is False: |
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continue |
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offers_found = 0 |
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coin_from_data = coins_map[offer_template['coin_from']] |
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coin_to_data = coins_map[offer_template['coin_to']] |
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wallet_from = read_json_api_wallet('wallets/{}'.format(coin_from_data['ticker'])) |
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for offer in sent_offers: |
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created_offers = script_state.get('offers', {}) |
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prev_template_offers = created_offers.get(offer_template['name'], {}) |
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if next((x for x in prev_template_offers if x['offer_id'] == offer['offer_id']), None): |
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offers_found += 1 |
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if float(wallet_from['balance']) <= float(offer_template['min_coin_from_amt']): |
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offer_id = offer['offer_id'] |
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print('Revoking offer {}, wallet from balance below minimum'.format(offer_id)) |
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result = read_json_api(f'revokeoffer/{offer_id}') |
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print('revokeoffer', result) |
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if offers_found > 0: |
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continue |
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if float(wallet_from['balance']) <= float(offer_template['min_coin_from_amt']): |
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print('Skipping template {}, wallet from balance below minimum'.format(offer_template['name'])) |
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continue |
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delay_next_offer_before = script_state.get('delay_next_offer_before', 0) |
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if delay_next_offer_before > int(time.time()): |
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print('Delaying offers until {}'.format(delay_next_offer_before)) |
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break |
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""" |
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received_offers = read_json_api(args.port, 'offers', {'active': 'active', 'include_sent': False, 'coin_from': coin_from_data['id'], 'coin_to': coin_to_data['id']}) |
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print('received_offers', received_offers) |
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TODO - adjust rates based on existing offers |
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""" |
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rates = read_json_api('rates', {'coin_from': coin_from_data['id'], 'coin_to': coin_to_data['id']}) |
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print('Rates', rates) |
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coingecko_rate = float(rates['coingecko']['rate_inferred']) |
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use_rate = coingecko_rate |
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if offer_template['ratetweakpercent'] != 0: |
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print('Adjusting rate {} by {}%.'.format(use_rate, offer_template['ratetweakpercent'])) |
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tweak = offer_template['ratetweakpercent'] / 100.0 |
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use_rate += use_rate * tweak |
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if use_rate < offer_template['minrate']: |
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print('Warning: Clamping rate to minimum.') |
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use_rate = offer_template['minrate'] |
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print('Creating offer for: {} at rate: {}'.format(offer_template, use_rate)) |
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template_from_addr = offer_template['address'] |
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offer_data = { |
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'addr_from': -1 if template_from_addr == 'auto' else template_from_addr, |
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'coin_from': coin_from_data['ticker'], |
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'coin_to': coin_to_data['ticker'], |
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'amt_from': offer_template['amount'], |
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'amt_var': offer_template['amount_variable'], |
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'valid_for_seconds': offer_template.get('offer_valid_seconds', config.get('offer_valid_seconds', 3600)), |
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'rate': use_rate, |
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'swap_type': offer_template.get('swap_type', 'adaptor_sig'), |
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'lockhrs': '24', |
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'automation_strat_id': 1} |
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if args.debug: |
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print('offer data {}'.format(offer_data)) |
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new_offer = read_json_api('offers/new', offer_data) |
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print('New offer: {}'.format(new_offer['offer_id'])) |
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if 'offers' not in script_state: |
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script_state['offers'] = {} |
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template_name = offer_template['name'] |
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if template_name not in script_state['offers']: |
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script_state['offers'][template_name] = [] |
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script_state['offers'][template_name].append({'offer_id': new_offer['offer_id'], 'time': int(time.time())}) |
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max_seconds_between_offers = config['max_seconds_between_offers'] |
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min_seconds_between_offers = config['min_seconds_between_offers'] |
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if max_seconds_between_offers > min_seconds_between_offers: |
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time_between_offers = random.randint(min_seconds_between_offers, max_seconds_between_offers) |
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else: |
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time_between_offers = min_seconds_between_offers |
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script_state['delay_next_offer_before'] = int(time.time()) + time_between_offers |
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write_state(args.statefile, script_state) |
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if args.debug and len(bid_templates) > 0: |
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print('Processing {} bid template{}'.format(config['num_enabled_bids'], 's' if config['num_enabled_bids'] != 1 else '')) |
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for bid_template in bid_templates: |
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if bid_template.get('enabled', True) is False: |
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continue |
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delay_next_bid_before = script_state.get('delay_next_bid_before', 0) |
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if delay_next_bid_before > int(time.time()): |
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print('Delaying bids until {}'.format(delay_next_bid_before)) |
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break |
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# Check bids in progress |
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max_concurrent = bid_template.get('max_concurrent', 1) |
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if 'bids' not in script_state: |
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script_state['bids'] = {} |
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template_name = bid_template['name'] |
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if template_name not in script_state['bids']: |
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script_state['bids'][template_name] = [] |
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previous_bids = script_state['bids'][template_name] |
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bids_in_progress: int = 0 |
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for previous_bid in previous_bids: |
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if not previous_bid['active']: |
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continue |
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previous_bid_id = previous_bid['bid_id'] |
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previous_bid_info = read_json_api(f'bids/{previous_bid_id}') |
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bid_state = previous_bid_info['bid_state'] |
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if bid_state in ('Completed', 'Timed-out', 'Abandoned', 'Error', 'Rejected'): |
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print(f'Marking bid inactive {previous_bid_id}, state {bid_state}') |
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previous_bid['active'] = False |
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write_state(args.statefile, script_state) |
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continue |
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if bid_state in ('Sent', 'Received') and previous_bid_info['expired_at'] < int(time.time()): |
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print(f'Marking bid inactive {previous_bid_id}, expired') |
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previous_bid['active'] = False |
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write_state(args.statefile, script_state) |
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continue |
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bids_in_progress += 1 |
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if bids_in_progress >= max_concurrent: |
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print('Max concurrent bids reached for template') |
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continue |
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# Bidder sends coin_to and receives coin_from |
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coin_from_data = coins_map[bid_template['coin_from']] |
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coin_to_data = coins_map[bid_template['coin_to']] |
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offers_options = { |
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'active': 'active', |
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'include_sent': False, |
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'coin_from': coin_from_data['id'], |
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'coin_to': coin_to_data['id'], |
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'with_extra_info': True, |
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'sort_by': 'rate', |
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'sort_dir': 'asc', |
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} |
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received_offers = read_json_api('offers', offers_options) |
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if args.debug: |
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print('Received Offers', received_offers) |
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for offer in received_offers: |
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offer_id = offer['offer_id'] |
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offer_amount = float(offer['amount_from']) |
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offer_rate = float(offer['rate']) |
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bid_amount = bid_template['amount'] |
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min_swap_amount = bid_template.get('min_swap_amount', 0.01) # TODO: Make default vary per coin |
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can_adjust_offer_amount: bool = offer['amount_negotiable'] |
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can_adjust_bid_amount: bool = bid_template.get('amount_variable', True) |
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can_adjust_amount: bool = can_adjust_offer_amount and can_adjust_bid_amount |
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if offer_amount < min_swap_amount: |
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if args.debug: |
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print(f'Offer amount below min swap amount bid {offer_id}') |
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continue |
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if can_adjust_offer_amount is False and offer_amount > bid_amount: |
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if args.debug: |
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print(f'Bid amount too low for offer {offer_id}') |
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continue |
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if bid_amount > offer_amount: |
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if can_adjust_bid_amount: |
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bid_amount = offer_amount |
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else: |
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if args.debug: |
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print(f'Bid amount too high for offer {offer_id}') |
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continue |
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if offer_rate > bid_template['maxrate']: |
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if args.debug: |
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print(f'Bid rate too low for offer {offer_id}') |
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continue |
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sent_bids = read_json_api('sentbids', {'offer_id': offer['offer_id'], 'with_available_or_active': True}) |
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if len(sent_bids) > 0: |
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if args.debug: |
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print(f'Already bidding on offer {offer_id}') |
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continue |
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offer_identity = read_json_api('identities/{}'.format(offer['addr_from'])) |
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if len(offer_identity) > 0: |
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id_offer_from = offer_identity[0] |
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automation_override = id_offer_from['automation_override'] |
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if automation_override == 2: |
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if args.debug: |
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print(f'Not bidding on offer {offer_id}, automation_override ({automation_override}).') |
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continue |
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if automation_override == 1: |
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if args.debug: |
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print('Offer address from {}, set to always accept.'.format(offer['addr_from'])) |
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else: |
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successful_sent_bids = id_offer_from['num_sent_bids_successful'] |
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failed_sent_bids = id_offer_from['num_sent_bids_failed'] |
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if failed_sent_bids > 3 and failed_sent_bids > successful_sent_bids: |
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if args.debug: |
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print(f'Not bidding on offer {offer_id}, too many failed bids ({failed_sent_bids}).') |
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continue |
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max_coin_from_balance = bid_template.get('max_coin_from_balance', -1) |
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if max_coin_from_balance > 0: |
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wallet_from = read_json_api_wallet('wallets/{}'.format(coin_from_data['ticker'])) |
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total_balance_from = float(wallet_from['balance']) + float(wallet_from['unconfirmed']) |
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if args.debug: |
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print(f'Total coin from balance {total_balance_from}') |
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if total_balance_from + bid_amount > max_coin_from_balance: |
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if can_adjust_amount and max_coin_from_balance - total_balance_from > min_swap_amount: |
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bid_amount = max_coin_from_balance - total_balance_from |
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print(f'Reduced bid amount to {bid_amount}') |
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else: |
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if args.debug: |
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print(f'Bid amount would exceed maximum wallet total for offer {offer_id}') |
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continue |
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min_coin_to_balance = bid_template['min_coin_to_balance'] |
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if min_coin_to_balance > 0: |
|
wallet_to = read_json_api_wallet('wallets/{}'.format(coin_to_data['ticker'])) |
|
|
|
total_balance_to = float(wallet_to['balance']) + float(wallet_to['unconfirmed']) |
|
if args.debug: |
|
print(f'Total coin to balance {total_balance_to}') |
|
|
|
swap_amount_to = bid_amount * offer_rate |
|
if total_balance_to - swap_amount_to < min_coin_to_balance: |
|
if can_adjust_amount: |
|
adjusted_swap_amount_to = total_balance_to - min_coin_to_balance |
|
adjusted_bid_amount = adjusted_swap_amount_to / offer_rate |
|
|
|
if adjusted_bid_amount > min_swap_amount: |
|
print(f'Reduced bid amount to {bid_amount}') |
|
bid_amount = adjusted_bid_amount |
|
swap_amount_to = adjusted_bid_amount * offer_rate |
|
|
|
if total_balance_to - swap_amount_to < min_coin_to_balance: |
|
if args.debug: |
|
print(f'Bid amount would exceed minimum coin to wallet total for offer {offer_id}') |
|
continue |
|
|
|
bid_data = { |
|
'offer_id': offer['offer_id'], |
|
'amount_from': bid_amount} |
|
|
|
if 'address' in bid_template: |
|
addr_from = bid_template['address'] |
|
if addr_from != -1 and addr_from != 'auto': |
|
bid_data['addr_from'] = addr_from |
|
|
|
if config.get('test_mode', False): |
|
print('Would create bid: {}'.format(bid_data)) |
|
bid_id = 'simulated' |
|
else: |
|
if args.debug: |
|
print('Creating bid: {}'.format(bid_data)) |
|
new_bid = read_json_api('bids/new', bid_data) |
|
print('New bid: {} on offer {}'.format(new_bid['bid_id'], offer['offer_id'])) |
|
bid_id = new_bid['bid_id'] |
|
|
|
script_state['bids'][template_name].append({'bid_id': bid_id, 'time': int(time.time()), 'active': True}) |
|
|
|
max_seconds_between_bids = config['max_seconds_between_bids'] |
|
min_seconds_between_bids = config['min_seconds_between_bids'] |
|
if max_seconds_between_bids > min_seconds_between_bids: |
|
time_between_bids = random.randint(min_seconds_between_bids, max_seconds_between_bids) |
|
else: |
|
time_between_bids = min_seconds_between_bids |
|
script_state['delay_next_bid_before'] = int(time.time()) + time_between_bids |
|
write_state(args.statefile, script_state) |
|
break # Create max one bid per iteration |
|
|
|
if args.debug and len(stealthex_swaps) > 0: |
|
print('Processing {} stealthex template{}'.format(config['num_enabled_swaps'], 's' if config['num_enabled_swaps'] != 1 else '')) |
|
for stealthex_swap in stealthex_swaps: |
|
if stealthex_swap.get('enabled', True) is False: |
|
continue |
|
coin_from_data = coins_map[stealthex_swap['coin_from']] |
|
|
|
wallet_from = read_json_api_wallet('wallets/{}'.format(coin_from_data['ticker'])) |
|
|
|
current_balance = float(wallet_from['balance']) |
|
|
|
min_balance_from = float(stealthex_swap['min_balance_from']) |
|
min_swap_amount = float(stealthex_swap['min_amount_tx']) |
|
max_swap_amount = float(stealthex_swap['max_amount_tx']) |
|
|
|
# TODO: Check range limits |
|
|
|
if current_balance >= min_balance_from + min_swap_amount: |
|
swap_amount = max_swap_amount |
|
if current_balance - swap_amount < min_balance_from: |
|
swap_amount = max(min_swap_amount, current_balance - min_balance_from) |
|
|
|
estimate_url = 'https://api.stealthex.io/api/v2/estimate/{}/{}?amount={}&api_key={}&fixed=true'.format(coin_from_data['ticker'].lower(), stealthex_swap['coin_to'].lower(), swap_amount, stealthex_swap['api_key']) |
|
if args.debug: |
|
print(f'Estimate URL: {estimate_url}') |
|
estimate_response = json.loads(post_req(estimate_url)) |
|
|
|
amount_to = float(estimate_response['estimated_amount']) |
|
rate = swap_amount / amount_to |
|
min_rate = float(stealthex_swap['min_rate']) |
|
if rate < min_rate: |
|
if args.debug: |
|
print('Stealthex rate {} below minimum {} for {} to {}'.format(rate, min_rate, coin_from_data['ticker'], stealthex_swap['coin_to'])) |
|
continue |
|
|
|
exchange_url = 'https://api.stealthex.io/api/v2/exchange?api_key={}'.format(stealthex_swap['api_key']) |
|
|
|
address_to = stealthex_swap.get('receive_address', 'auto') |
|
if address_to == 'auto': |
|
address_to = read_json_api('wallets/{}/nextdepositaddr'.format(stealthex_swap['coin_to'])) |
|
|
|
address_refund = stealthex_swap.get('refund_address', 'auto') |
|
if address_refund == 'auto': |
|
address_refund = read_json_api('wallets/{}/nextdepositaddr'.format(coin_from_data['ticker'])) |
|
|
|
exchange_data = { |
|
'currency_from': coin_from_data['ticker'].lower(), |
|
'currency_to': stealthex_swap['coin_to'].lower(), |
|
'address_to': address_to, |
|
'amount_from': swap_amount, |
|
'fixed': True, |
|
# 'extra_id_to': |
|
# 'referral': |
|
'refund_address': address_refund, |
|
# 'refund_extra_id': |
|
'rate_id': estimate_response['rate_id'], |
|
} |
|
|
|
if args.debug: |
|
print(f'Exchange URL: {estimate_url}') |
|
print(f'Exchange data: {exchange_data}') |
|
|
|
exchange_response = json.loads(post_req(exchange_url, exchange_data)) |
|
|
|
if 'Error' in estimate_response: |
|
raise ValueError('Exchange error ' + estimate_response) |
|
|
|
raise ValueError('TODO') |
|
|
|
except Exception as e: |
|
print(f'Error: {e}.') |
|
|
|
if args.oneshot: |
|
break |
|
print('Looping indefinitely, ctrl+c to exit.') |
|
delay_event.wait(60) |
|
|
|
print('Done.') |
|
|
|
|
|
if __name__ == '__main__': |
|
main()
|
|
|