84 строки
4.1 KiB
Python
84 строки
4.1 KiB
Python
import json
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import math
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from datetime import datetime, timezone
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from typing import Any
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from sqlalchemy.orm import Session
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from app.coinex import CoinExClient
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from app.models import MarketRule
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class MarketRuleService:
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def __init__(self, coinex: CoinExClient) -> None:
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self.coinex = coinex
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async def sync(self, db: Session, markets: list[str]) -> dict[str, Any]:
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payload = await self.coinex.get_market_info()
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rows = payload.get('data') or []
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if isinstance(rows, dict):
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rows = [rows]
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wanted = {m.upper() for m in markets}
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synced = 0
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for row in rows:
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if not isinstance(row, dict):
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continue
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market = str(row.get('market') or row.get('name') or '').upper()
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if wanted and market not in wanted:
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continue
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if not market:
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continue
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rule = db.query(MarketRule).filter(MarketRule.market == market).first()
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if rule is None:
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rule = MarketRule(market=market)
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db.add(rule)
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rule.base_asset = str(row.get('base_ccy') or row.get('base_currency') or row.get('base') or '').upper()
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rule.quote_asset = str(row.get('quote_ccy') or row.get('quote_currency') or row.get('quote') or 'USDT').upper()
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rule.min_amount = self._float(row.get('min_amount') or row.get('min_base_amount') or row.get('min_asset_amount'), 0.0)
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rule.min_quote_amount = self._float(row.get('min_quote_amount') or row.get('min_amount_value') or row.get('min_value'), 0.0)
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rule.amount_precision = self._int(row.get('amount_precision') or row.get('base_ccy_precision') or row.get('trading_precision'), 8)
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rule.price_precision = self._int(row.get('price_precision') or row.get('quote_ccy_precision'), 8)
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rule.maker_fee_rate = self._float(row.get('maker_fee_rate') or row.get('maker_fee') or row.get('maker'), 0.002)
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rule.taker_fee_rate = self._float(row.get('taker_fee_rate') or row.get('taker_fee') or row.get('taker'), 0.002)
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rule.is_trading_enabled = str(row.get('status') or row.get('state') or 'online').lower() not in {'offline', 'disabled', 'suspend'}
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rule.raw_json = json.dumps(row, ensure_ascii=False)
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rule.synced_at = datetime.now(timezone.utc)
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synced += 1
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db.commit()
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return {'synced': synced, 'markets': list(wanted)}
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def get(self, db: Session, market: str) -> MarketRule | None:
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return db.query(MarketRule).filter(MarketRule.market == market.upper()).first()
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def ensure_amount(self, db: Session, market: str, quote_amount: float, price: float) -> tuple[float, str]:
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rule = self.get(db, market)
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if price <= 0:
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raise ValueError('price must be positive')
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raw_amount = quote_amount / price
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if rule is None:
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return raw_amount, 'Лимиты CoinEx еще не синхронизированы, используется расчет без округления.'
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amount = self.floor_amount(raw_amount, rule.amount_precision)
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min_amount = rule.min_amount or 0.0
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min_quote = rule.min_quote_amount or 0.0
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if min_amount and amount < min_amount:
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raise ValueError(f'amount ниже лимита CoinEx: {amount} < {min_amount}')
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if min_quote and amount * price < min_quote:
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raise ValueError(f'quote amount ниже лимита CoinEx: {amount * price:.8f} < {min_quote}')
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return amount, f'Лимиты CoinEx применены: amount_precision={rule.amount_precision}, min_amount={rule.min_amount}, min_quote={rule.min_quote_amount}, taker_fee={rule.taker_fee_rate}'
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def floor_amount(self, amount: float, precision: int) -> float:
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factor = 10 ** max(0, precision)
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return math.floor(amount * factor) / factor
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def _float(self, value: Any, default: float) -> float:
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try:
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return float(value)
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except (TypeError, ValueError):
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return default
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def _int(self, value: Any, default: int) -> int:
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try:
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return int(value)
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except (TypeError, ValueError):
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return default
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