stable/freqtrade/commands/build_config_commands.py
2020-02-01 14:22:40 +01:00

194 lines
5.9 KiB
Python

import logging
from pathlib import Path
from typing import Any, Dict
from questionary import Separator, prompt
from freqtrade.constants import UNLIMITED_STAKE_AMOUNT
from freqtrade.exchange import available_exchanges, MAP_EXCHANGE_CHILDCLASS
from freqtrade.misc import render_template
from freqtrade.exceptions import OperationalException
logger = logging.getLogger(__name__)
def validate_is_int(val):
try:
_ = int(val)
return True
except Exception:
return False
def validate_is_float(val):
try:
_ = float(val)
return True
except Exception:
return False
def ask_user_overwrite(config_path: Path) -> bool:
questions = [
{
"type": "confirm",
"name": "overwrite",
"message": f"File {config_path} already exists. Overwrite?",
"default": False,
},
]
answers = prompt(questions)
return answers['overwrite']
def ask_user_config() -> Dict[str, Any]:
"""
Ask user a few questions to build the configuration.
Interactive questions built using https://github.com/tmbo/questionary
:returns: Dict with keys to put into template
"""
questions = [
{
"type": "confirm",
"name": "dry_run",
"message": "Do you want to enable Dry-run (simulated trades)?",
"default": True,
},
{
"type": "text",
"name": "stake_currency",
"message": "Please insert your stake currency:",
"default": 'BTC',
},
{
"type": "text",
"name": "stake_amount",
"message": "Please insert your stake amount:",
"default": "0.01",
"validate": lambda val: val == UNLIMITED_STAKE_AMOUNT or validate_is_float(val),
},
{
"type": "text",
"name": "max_open_trades",
"message": f"Please insert max_open_trades (Integer or '{UNLIMITED_STAKE_AMOUNT}'):",
"default": "3",
"validate": lambda val: val == UNLIMITED_STAKE_AMOUNT or validate_is_int(val)
},
{
"type": "text",
"name": "ticker_interval",
"message": "Please insert your ticker interval:",
"default": "5m",
},
{
"type": "text",
"name": "fiat_display_currency",
"message": "Please insert your display Currency (for reporting):",
"default": 'USD',
},
{
"type": "select",
"name": "exchange_name",
"message": "Select exchange",
"choices": [
"bittrex",
"binance",
"binanceje",
"binanceus",
"kraken",
Separator(),
"other",
],
},
{
"type": "autocomplete",
"name": "exchange_name",
"message": "Type your exchange name (Must be supported by ccxt)",
"choices": available_exchanges(),
"when": lambda x: x["exchange_name"] == 'other'
},
{
"type": "password",
"name": "exchange_key",
"message": "Insert Exchange Key",
"when": lambda x: not x['dry_run']
},
{
"type": "password",
"name": "exchange_secret",
"message": "Insert Exchange Secret",
"when": lambda x: not x['dry_run']
},
{
"type": "confirm",
"name": "telegram",
"message": "Do you want to enable Telegram?",
"default": False,
},
{
"type": "password",
"name": "telegram_token",
"message": "Insert Telegram token",
"when": lambda x: x['telegram']
},
{
"type": "text",
"name": "telegram_chat_id",
"message": "Insert Telegram chat id",
"when": lambda x: x['telegram']
},
]
answers = prompt(questions)
if not answers:
# Interrupted questionary sessions return an empty dict.
raise OperationalException("User interrupted interactive questions.")
return answers
def deploy_new_config(config_path: Path, selections: Dict[str, Any]) -> None:
"""
Applies selections to the template and writes the result to config_path
:param config_path: Path object for new config file. Should not exist yet
:param selecions: Dict containing selections taken by the user.
"""
from jinja2.exceptions import TemplateNotFound
try:
exchange_template = MAP_EXCHANGE_CHILDCLASS.get(
selections['exchange_name'], selections['exchange_name'])
selections['exchange'] = render_template(
templatefile=f"subtemplates/exchange_{exchange_template}.j2",
arguments=selections
)
except TemplateNotFound:
selections['exchange'] = render_template(
templatefile=f"subtemplates/exchange_generic.j2",
arguments=selections
)
config_text = render_template(templatefile='base_config.json.j2',
arguments=selections)
logger.info(f"Writing config to `{config_path}`.")
config_path.write_text(config_text)
def start_new_config(args: Dict[str, Any]) -> None:
"""
Create a new strategy from a template
Asking the user questions to fill out the templateaccordingly.
"""
config_path = Path(args['config'][0])
if config_path.exists():
overwrite = ask_user_overwrite(config_path)
if overwrite:
config_path.unlink()
else:
raise OperationalException(
f"Configuration `{config_path}` already exists. "
"Please use another configuration name or delete the existing configuration.")
selections = ask_user_config()
deploy_new_config(config_path, selections)