stable/freqtrade/persistence/pairlock.py

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