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391 lines
15 KiB
Python
391 lines
15 KiB
Python
# pragma pylint: disable=W0603
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"""Wallet"""
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import logging
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from copy import deepcopy
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from datetime import datetime, timedelta
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from typing import Dict, NamedTuple, Optional
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from freqtrade.constants import UNLIMITED_STAKE_AMOUNT, Config, IntOrInf
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from freqtrade.enums import RunMode, TradingMode
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from freqtrade.exceptions import DependencyException
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from freqtrade.exchange import Exchange
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from freqtrade.misc import safe_value_fallback
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from freqtrade.persistence import LocalTrade, Trade
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from freqtrade.util.datetime_helpers import dt_now
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logger = logging.getLogger(__name__)
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# wallet data structure
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class Wallet(NamedTuple):
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currency: str
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free: float = 0
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used: float = 0
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total: float = 0
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class PositionWallet(NamedTuple):
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symbol: str
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position: float = 0
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leverage: float = 0
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collateral: float = 0
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side: str = "long"
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class Wallets:
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def __init__(self, config: Config, exchange: Exchange, is_backtest: bool = False) -> None:
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self._config = config
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self._is_backtest = is_backtest
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self._exchange = exchange
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self._wallets: Dict[str, Wallet] = {}
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self._positions: Dict[str, PositionWallet] = {}
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self.start_cap = config["dry_run_wallet"]
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self._last_wallet_refresh: Optional[datetime] = None
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self.update()
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def get_free(self, currency: str) -> float:
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balance = self._wallets.get(currency)
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if balance and balance.free:
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return balance.free
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else:
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return 0
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def get_used(self, currency: str) -> float:
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balance = self._wallets.get(currency)
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if balance and balance.used:
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return balance.used
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else:
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return 0
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def get_total(self, currency: str) -> float:
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balance = self._wallets.get(currency)
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if balance and balance.total:
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return balance.total
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else:
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return 0
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def get_owned(self, pair: str, base_currency: str) -> float:
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"""
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Get currently owned value.
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Designed to work across both spot and futures.
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"""
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if self._config.get("trading_mode", "spot") != TradingMode.FUTURES:
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return self.get_total(base_currency) or 0
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if pos := self._positions.get(pair):
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return pos.position
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return 0
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def _update_dry(self) -> None:
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"""
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Update from database in dry-run mode
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- Apply profits of closed trades on top of stake amount
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- Subtract currently tied up stake_amount in open trades
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- update balances for currencies currently in trades
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"""
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# Recreate _wallets to reset closed trade balances
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_wallets = {}
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_positions = {}
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open_trades = Trade.get_trades_proxy(is_open=True)
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if not self._is_backtest:
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# Live / Dry-run mode
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tot_profit = Trade.get_total_closed_profit()
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else:
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# Backtest mode
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tot_profit = LocalTrade.bt_total_profit
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tot_profit += sum(trade.realized_profit for trade in open_trades)
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tot_in_trades = sum(trade.stake_amount for trade in open_trades)
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used_stake = 0.0
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if self._config.get("trading_mode", "spot") != TradingMode.FUTURES:
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current_stake = self.start_cap + tot_profit - tot_in_trades
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total_stake = current_stake
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for trade in open_trades:
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curr = self._exchange.get_pair_base_currency(trade.pair)
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_wallets[curr] = Wallet(curr, trade.amount, 0, trade.amount)
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else:
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tot_in_trades = 0
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for position in open_trades:
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# size = self._exchange._contracts_to_amount(position.pair, position['contracts'])
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size = position.amount
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collateral = position.stake_amount
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leverage = position.leverage
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tot_in_trades += collateral
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_positions[position.pair] = PositionWallet(
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position.pair,
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position=size,
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leverage=leverage,
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collateral=collateral,
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side=position.trade_direction,
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)
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current_stake = self.start_cap + tot_profit - tot_in_trades
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used_stake = tot_in_trades
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total_stake = current_stake + tot_in_trades
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_wallets[self._config["stake_currency"]] = Wallet(
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currency=self._config["stake_currency"],
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free=current_stake,
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used=used_stake,
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total=total_stake,
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)
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self._wallets = _wallets
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self._positions = _positions
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def _update_live(self) -> None:
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balances = self._exchange.get_balances()
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for currency in balances:
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if isinstance(balances[currency], dict):
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self._wallets[currency] = Wallet(
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currency,
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balances[currency].get("free", 0),
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balances[currency].get("used", 0),
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balances[currency].get("total", 0),
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)
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# Remove currencies no longer in get_balances output
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for currency in deepcopy(self._wallets):
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if currency not in balances:
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del self._wallets[currency]
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positions = self._exchange.fetch_positions()
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self._positions = {}
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for position in positions:
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symbol = position["symbol"]
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if position["side"] is None or position["collateral"] == 0.0:
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# Position is not open ...
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continue
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size = self._exchange._contracts_to_amount(symbol, position["contracts"])
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collateral = safe_value_fallback(position, "collateral", "initialMargin", 0.0)
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leverage = position["leverage"]
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self._positions[symbol] = PositionWallet(
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symbol,
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position=size,
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leverage=leverage,
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collateral=collateral,
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side=position["side"],
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)
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def update(self, require_update: bool = True) -> None:
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"""
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Updates wallets from the configured version.
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By default, updates from the exchange.
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Update-skipping should only be used for user-invoked /balance calls, since
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for trading operations, the latest balance is needed.
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:param require_update: Allow skipping an update if balances were recently refreshed
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"""
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now = dt_now()
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if (
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require_update
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or self._last_wallet_refresh is None
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or (self._last_wallet_refresh + timedelta(seconds=3600) < now)
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):
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if not self._config["dry_run"] or self._config.get("runmode") == RunMode.LIVE:
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self._update_live()
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else:
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self._update_dry()
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if not self._is_backtest:
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logger.info("Wallets synced.")
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self._last_wallet_refresh = dt_now()
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def get_all_balances(self) -> Dict[str, Wallet]:
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return self._wallets
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def get_all_positions(self) -> Dict[str, PositionWallet]:
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return self._positions
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def _check_exit_amount(self, trade: Trade) -> bool:
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if trade.trading_mode != TradingMode.FUTURES:
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# Slightly higher offset than in safe_exit_amount.
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wallet_amount: float = self.get_total(trade.safe_base_currency) * (2 - 0.981)
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else:
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# wallet_amount: float = self.wallets.get_free(trade.safe_base_currency)
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position = self._positions.get(trade.pair)
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if position is None:
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# We don't own anything :O
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return False
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wallet_amount = position.position
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if wallet_amount >= trade.amount:
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return True
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return False
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def check_exit_amount(self, trade: Trade) -> bool:
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"""
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Checks if the exit amount is available in the wallet.
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:param trade: Trade to check
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:return: True if the exit amount is available, False otherwise
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"""
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if not self._check_exit_amount(trade):
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# Update wallets just to make sure
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self.update()
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return self._check_exit_amount(trade)
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return True
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def get_starting_balance(self) -> float:
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"""
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Retrieves starting balance - based on either available capital,
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or by using current balance subtracting
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"""
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if "available_capital" in self._config:
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return self._config["available_capital"]
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else:
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tot_profit = Trade.get_total_closed_profit()
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open_stakes = Trade.total_open_trades_stakes()
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available_balance = self.get_free(self._config["stake_currency"])
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return available_balance - tot_profit + open_stakes
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def get_total_stake_amount(self):
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"""
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Return the total currently available balance in stake currency, including tied up stake and
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respecting tradable_balance_ratio.
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Calculated as
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(<open_trade stakes> + free amount) * tradable_balance_ratio
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"""
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val_tied_up = Trade.total_open_trades_stakes()
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if "available_capital" in self._config:
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starting_balance = self._config["available_capital"]
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tot_profit = Trade.get_total_closed_profit()
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available_amount = starting_balance + tot_profit
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else:
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# Ensure <tradable_balance_ratio>% is used from the overall balance
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# Otherwise we'd risk lowering stakes with each open trade.
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# (tied up + current free) * ratio) - tied up
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available_amount = (
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val_tied_up + self.get_free(self._config["stake_currency"])
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) * self._config["tradable_balance_ratio"]
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return available_amount
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def get_available_stake_amount(self) -> float:
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"""
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Return the total currently available balance in stake currency,
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respecting tradable_balance_ratio.
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Calculated as
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(<open_trade stakes> + free amount) * tradable_balance_ratio - <open_trade stakes>
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"""
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free = self.get_free(self._config["stake_currency"])
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return min(self.get_total_stake_amount() - Trade.total_open_trades_stakes(), free)
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def _calculate_unlimited_stake_amount(
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self, available_amount: float, val_tied_up: float, max_open_trades: IntOrInf
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) -> float:
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"""
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Calculate stake amount for "unlimited" stake amount
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:return: 0 if max number of trades reached, else stake_amount to use.
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"""
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if max_open_trades == 0:
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return 0
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possible_stake = (available_amount + val_tied_up) / max_open_trades
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# Theoretical amount can be above available amount - therefore limit to available amount!
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return min(possible_stake, available_amount)
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def _check_available_stake_amount(self, stake_amount: float, available_amount: float) -> float:
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"""
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Check if stake amount can be fulfilled with the available balance
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for the stake currency
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:return: float: Stake amount
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:raise: DependencyException if balance is lower than stake-amount
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"""
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if self._config["amend_last_stake_amount"]:
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# Remaining amount needs to be at least stake_amount * last_stake_amount_min_ratio
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# Otherwise the remaining amount is too low to trade.
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if available_amount > (stake_amount * self._config["last_stake_amount_min_ratio"]):
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stake_amount = min(stake_amount, available_amount)
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else:
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stake_amount = 0
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if available_amount < stake_amount:
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raise DependencyException(
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f"Available balance ({available_amount} {self._config['stake_currency']}) is "
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f"lower than stake amount ({stake_amount} {self._config['stake_currency']})"
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)
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return stake_amount
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def get_trade_stake_amount(
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self, pair: str, max_open_trades: IntOrInf, edge=None, update: bool = True
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) -> float:
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"""
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Calculate stake amount for the trade
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:return: float: Stake amount
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:raise: DependencyException if the available stake amount is too low
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"""
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stake_amount: float
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# Ensure wallets are up-to-date.
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if update:
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self.update()
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val_tied_up = Trade.total_open_trades_stakes()
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available_amount = self.get_available_stake_amount()
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if edge:
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stake_amount = edge.stake_amount(
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pair,
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self.get_free(self._config["stake_currency"]),
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self.get_total(self._config["stake_currency"]),
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val_tied_up,
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)
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else:
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stake_amount = self._config["stake_amount"]
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if stake_amount == UNLIMITED_STAKE_AMOUNT:
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stake_amount = self._calculate_unlimited_stake_amount(
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available_amount, val_tied_up, max_open_trades
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)
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return self._check_available_stake_amount(stake_amount, available_amount)
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def validate_stake_amount(
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self,
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pair: str,
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stake_amount: Optional[float],
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min_stake_amount: Optional[float],
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max_stake_amount: float,
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trade_amount: Optional[float],
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):
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if not stake_amount:
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logger.debug(f"Stake amount is {stake_amount}, ignoring possible trade for {pair}.")
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return 0
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max_allowed_stake = min(max_stake_amount, self.get_available_stake_amount())
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if trade_amount:
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# if in a trade, then the resulting trade size cannot go beyond the max stake
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# Otherwise we could no longer exit.
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max_allowed_stake = min(max_allowed_stake, max_stake_amount - trade_amount)
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if min_stake_amount is not None and min_stake_amount > max_allowed_stake:
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if not self._is_backtest:
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logger.warning(
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"Minimum stake amount > available balance. "
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f"{min_stake_amount} > {max_allowed_stake}"
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)
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return 0
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if min_stake_amount is not None and stake_amount < min_stake_amount:
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if not self._is_backtest:
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logger.info(
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f"Stake amount for pair {pair} is too small "
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f"({stake_amount} < {min_stake_amount}), adjusting to {min_stake_amount}."
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)
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if stake_amount * 1.3 < min_stake_amount:
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# Top-cap stake-amount adjustments to +30%.
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if not self._is_backtest:
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logger.info(
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f"Adjusted stake amount for pair {pair} is more than 30% bigger than "
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f"the desired stake amount of ({stake_amount:.8f} * 1.3 = "
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f"{stake_amount * 1.3:.8f}) < {min_stake_amount}), ignoring trade."
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)
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return 0
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stake_amount = min_stake_amount
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if stake_amount > max_allowed_stake:
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if not self._is_backtest:
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logger.info(
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f"Stake amount for pair {pair} is too big "
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f"({stake_amount} > {max_allowed_stake}), adjusting to {max_allowed_stake}."
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)
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stake_amount = max_allowed_stake
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return stake_amount
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