181 lines
7.3 KiB
Python
181 lines
7.3 KiB
Python
""" Kraken exchange subclass """
|
|
import logging
|
|
from typing import Any, Dict, List, Optional, Tuple
|
|
|
|
import ccxt
|
|
|
|
from freqtrade.enums import Collateral, TradingMode
|
|
from freqtrade.exceptions import (DDosProtection, InsufficientFundsError, InvalidOrderException,
|
|
OperationalException, TemporaryError)
|
|
from freqtrade.exchange import Exchange
|
|
from freqtrade.exchange.common import retrier
|
|
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
class Kraken(Exchange):
|
|
|
|
_params: Dict = {"trading_agreement": "agree"}
|
|
_ft_has: Dict = {
|
|
"stoploss_on_exchange": True,
|
|
"ohlcv_candle_limit": 720,
|
|
"trades_pagination": "id",
|
|
"trades_pagination_arg": "since",
|
|
}
|
|
funding_fee_times: List[int] = [0, 4, 8, 12, 16, 20] # hours of the day
|
|
|
|
_supported_trading_mode_collateral_pairs: List[Tuple[TradingMode, Collateral]] = [
|
|
# TradingMode.SPOT always supported and not required in this list
|
|
# (TradingMode.MARGIN, Collateral.CROSS), # TODO-lev: Uncomment once supported
|
|
# (TradingMode.FUTURES, Collateral.CROSS) # TODO-lev: No CCXT support
|
|
]
|
|
|
|
def market_is_tradable(self, market: Dict[str, Any]) -> bool:
|
|
"""
|
|
Check if the market symbol is tradable by Freqtrade.
|
|
Default checks + check if pair is darkpool pair.
|
|
"""
|
|
parent_check = super().market_is_tradable(market)
|
|
|
|
return (parent_check and
|
|
market.get('darkpool', False) is False)
|
|
|
|
@retrier
|
|
def get_balances(self) -> dict:
|
|
if self._config['dry_run']:
|
|
return {}
|
|
|
|
try:
|
|
balances = self._api.fetch_balance()
|
|
# Remove additional info from ccxt results
|
|
balances.pop("info", None)
|
|
balances.pop("free", None)
|
|
balances.pop("total", None)
|
|
balances.pop("used", None)
|
|
|
|
orders = self._api.fetch_open_orders()
|
|
order_list = [(x["symbol"].split("/")[0 if x["side"] == "sell" else 1],
|
|
x["remaining"] if x["side"] == "sell" else x["remaining"] * x["price"],
|
|
# Don't remove the below comment, this can be important for debugging
|
|
# x["side"], x["amount"],
|
|
) for x in orders]
|
|
for bal in balances:
|
|
if not isinstance(balances[bal], dict):
|
|
continue
|
|
balances[bal]['used'] = sum(order[1] for order in order_list if order[0] == bal)
|
|
balances[bal]['free'] = balances[bal]['total'] - balances[bal]['used']
|
|
|
|
return balances
|
|
except ccxt.DDoSProtection as e:
|
|
raise DDosProtection(e) from e
|
|
except (ccxt.NetworkError, ccxt.ExchangeError) as e:
|
|
raise TemporaryError(
|
|
f'Could not get balance due to {e.__class__.__name__}. Message: {e}') from e
|
|
except ccxt.BaseError as e:
|
|
raise OperationalException(e) from e
|
|
|
|
def stoploss_adjust(self, stop_loss: float, order: Dict, side: str) -> bool:
|
|
"""
|
|
Verify stop_loss against stoploss-order value (limit or price)
|
|
Returns True if adjustment is necessary.
|
|
"""
|
|
return (order['type'] in ('stop-loss', 'stop-loss-limit') and (
|
|
(side == "sell" and stop_loss > float(order['price'])) or
|
|
(side == "buy" and stop_loss < float(order['price']))
|
|
))
|
|
|
|
@retrier(retries=0)
|
|
def stoploss(self, pair: str, amount: float, stop_price: float,
|
|
order_types: Dict, side: str, leverage: float) -> Dict:
|
|
"""
|
|
Creates a stoploss market order.
|
|
Stoploss market orders is the only stoploss type supported by kraken.
|
|
"""
|
|
params = self._params.copy()
|
|
|
|
if order_types.get('stoploss', 'market') == 'limit':
|
|
ordertype = "stop-loss-limit"
|
|
limit_price_pct = order_types.get('stoploss_on_exchange_limit_ratio', 0.99)
|
|
if side == "sell":
|
|
limit_rate = stop_price * limit_price_pct
|
|
else:
|
|
limit_rate = stop_price * (2 - limit_price_pct)
|
|
params['price2'] = self.price_to_precision(pair, limit_rate)
|
|
else:
|
|
ordertype = "stop-loss"
|
|
|
|
stop_price = self.price_to_precision(pair, stop_price)
|
|
|
|
if self._config['dry_run']:
|
|
dry_order = self.create_dry_run_order(
|
|
pair, ordertype, side, amount, stop_price, leverage)
|
|
return dry_order
|
|
|
|
try:
|
|
amount = self.amount_to_precision(pair, amount)
|
|
|
|
order = self._api.create_order(symbol=pair, type=ordertype, side=side,
|
|
amount=amount, price=stop_price, params=params)
|
|
self._log_exchange_response('create_stoploss_order', order)
|
|
logger.info('stoploss order added for %s. '
|
|
'stop price: %s.', pair, stop_price)
|
|
return order
|
|
except ccxt.InsufficientFunds as e:
|
|
raise InsufficientFundsError(
|
|
f'Insufficient funds to create {ordertype} {side} order on market {pair}. '
|
|
f'Tried to create stoploss with amount {amount} at stoploss {stop_price}. '
|
|
f'Message: {e}') from e
|
|
except ccxt.InvalidOrder as e:
|
|
raise InvalidOrderException(
|
|
f'Could not create {ordertype} {side} order on market {pair}. '
|
|
f'Tried to create stoploss with amount {amount} at stoploss {stop_price}. '
|
|
f'Message: {e}') from e
|
|
except ccxt.DDoSProtection as e:
|
|
raise DDosProtection(e) from e
|
|
except (ccxt.NetworkError, ccxt.ExchangeError) as e:
|
|
raise TemporaryError(
|
|
f'Could not place {side} order due to {e.__class__.__name__}. Message: {e}') from e
|
|
except ccxt.BaseError as e:
|
|
raise OperationalException(e) from e
|
|
|
|
def _set_leverage(
|
|
self,
|
|
leverage: float,
|
|
pair: Optional[str] = None,
|
|
trading_mode: Optional[TradingMode] = None
|
|
):
|
|
"""
|
|
Kraken set's the leverage as an option in the order object, so we need to
|
|
add it to params
|
|
"""
|
|
return
|
|
|
|
def _get_params(self, ordertype: str, leverage: float, time_in_force: str = 'gtc') -> Dict:
|
|
params = super()._get_params(ordertype, leverage, time_in_force)
|
|
if leverage > 1.0:
|
|
params['leverage'] = leverage
|
|
return params
|
|
|
|
def _get_funding_fee(
|
|
self,
|
|
size: float,
|
|
funding_rate: float,
|
|
mark_price: float,
|
|
time_in_ratio: Optional[float] = None
|
|
) -> float:
|
|
"""
|
|
Calculates a single funding fee
|
|
:param size: contract size * number of contracts
|
|
:param mark_price: The price of the asset that the contract is based off of
|
|
:param funding_rate: the interest rate and the premium
|
|
- interest rate:
|
|
- premium: varies by price difference between the perpetual contract and mark price
|
|
:param time_in_ratio: time elapsed within funding period without position alteration
|
|
"""
|
|
if not time_in_ratio:
|
|
raise OperationalException(
|
|
f"time_in_ratio is required for {self.name}._get_funding_fee")
|
|
nominal_value = mark_price * size
|
|
return nominal_value * funding_rate * time_in_ratio
|