75 lines
3.0 KiB
Python
75 lines
3.0 KiB
Python
from datetime import datetime, timezone
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from typing import Any, ClassVar, Dict, Optional
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from sqlalchemy import ScalarResult, String, or_, select
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from sqlalchemy.orm import Mapped, mapped_column
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from freqtrade.constants import DATETIME_PRINT_FORMAT
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from freqtrade.persistence.base import ModelBase, SessionType
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class PairLock(ModelBase):
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"""
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Pair Locks database model.
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"""
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__tablename__ = 'pairlocks'
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session: ClassVar[SessionType]
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id: Mapped[int] = mapped_column(primary_key=True)
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pair: Mapped[str] = mapped_column(String(25), nullable=False, index=True)
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# lock direction - long, short or * (for both)
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side: Mapped[str] = mapped_column(String(25), nullable=False, default="*")
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reason: Mapped[Optional[str]] = mapped_column(String(255), nullable=True)
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# Time the pair was locked (start time)
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lock_time: Mapped[datetime] = mapped_column(nullable=False)
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# Time until the pair is locked (end time)
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lock_end_time: Mapped[datetime] = mapped_column(nullable=False, index=True)
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active: Mapped[bool] = mapped_column(nullable=False, default=True, index=True)
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def __repr__(self) -> str:
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lock_time = self.lock_time.strftime(DATETIME_PRINT_FORMAT)
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lock_end_time = self.lock_end_time.strftime(DATETIME_PRINT_FORMAT)
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return (
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f'PairLock(id={self.id}, pair={self.pair}, side={self.side}, lock_time={lock_time}, '
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f'lock_end_time={lock_end_time}, reason={self.reason}, active={self.active})')
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@staticmethod
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def query_pair_locks(
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pair: Optional[str], now: datetime, side: str = '*') -> ScalarResult['PairLock']:
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"""
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Get all currently active locks for this pair
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:param pair: Pair to check for. Returns all current locks if pair is empty
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:param now: Datetime object (generated via datetime.now(timezone.utc)).
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"""
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filters = [PairLock.lock_end_time > now,
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# Only active locks
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PairLock.active.is_(True), ]
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if pair:
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filters.append(PairLock.pair == pair)
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if side != '*':
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filters.append(or_(PairLock.side == side, PairLock.side == '*'))
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else:
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filters.append(PairLock.side == '*')
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return PairLock.session.scalars(select(PairLock).filter(*filters))
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@staticmethod
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def get_all_locks() -> ScalarResult['PairLock']:
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return PairLock.session.scalars(select(PairLock))
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def to_json(self) -> Dict[str, Any]:
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return {
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'id': self.id,
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'pair': self.pair,
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'lock_time': self.lock_time.strftime(DATETIME_PRINT_FORMAT),
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'lock_timestamp': int(self.lock_time.replace(tzinfo=timezone.utc).timestamp() * 1000),
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'lock_end_time': self.lock_end_time.strftime(DATETIME_PRINT_FORMAT),
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'lock_end_timestamp': int(self.lock_end_time.replace(tzinfo=timezone.utc
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).timestamp() * 1000),
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'reason': self.reason,
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'side': self.side,
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'active': self.active,
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}
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