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feat: Added price_rounding modes in config

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ASU
2023-03-09 02:11:31 +02:00
parent ba38a826e9
commit 1132fa6093
4 changed files with 113 additions and 51 deletions
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44
freqtrade/exchange/exchange_utils.py
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@@ -2,11 +2,12 @@
Exchange support utils
"""
from datetime import datetime, timedelta, timezone
from math import ceil
from math import ceil, floor
from typing import Any, Dict, List, Optional, Tuple
import ccxt
from ccxt import ROUND_DOWN, ROUND_UP, TICK_SIZE, TRUNCATE, decimal_to_precision
from ccxt import (DECIMAL_PLACES, ROUND, ROUND_DOWN, ROUND_UP, SIGNIFICANT_DIGITS, TICK_SIZE,
TRUNCATE, decimal_to_precision)
from freqtrade.exchange.common import BAD_EXCHANGES, EXCHANGE_HAS_OPTIONAL, EXCHANGE_HAS_REQUIRED
from freqtrade.util import FtPrecise
@@ -219,35 +220,48 @@ def amount_to_contract_precision(
return amount
def price_to_precision(price: float, price_precision: Optional[float],
precisionMode: Optional[int]) -> float:
def price_to_precision(
price: float,
price_precision: Optional[float],
precisionMode: Optional[int],
rounding_mode: int = ROUND_UP,
) -> float:
"""
Returns the price rounded up to the precision the Exchange accepts.
Partial Re-implementation of ccxt internal method decimal_to_precision(),
which does not support rounding up
TODO: If ccxt supports ROUND_UP for decimal_to_precision(), we could remove this and
align with amount_to_precision().
!!! Rounds up
:param price: price to convert
:param price_precision: price precision to use. Used from markets[pair]['precision']['price']
:param precisionMode: precision mode to use. Should be used from precisionMode
one of ccxt's DECIMAL_PLACES, SIGNIFICANT_DIGITS, or TICK_SIZE
:param rounding_mode: rounding mode to use. Defaults to ROUND_UP
:return: price rounded up to the precision the Exchange accepts
"""
if price_precision is not None and precisionMode is not None:
# price = float(decimal_to_precision(price, rounding_mode=ROUND,
# precision=price_precision,
# counting_mode=self.precisionMode,
# ))
if precisionMode == TICK_SIZE:
if rounding_mode == ROUND:
ticks = price / price_precision
rounded_ticks = round(ticks)
return rounded_ticks * price_precision
precision = FtPrecise(price_precision)
price_str = FtPrecise(price)
missing = price_str % precision
if not missing == FtPrecise("0"):
price = round(float(str(price_str - missing + precision)), 14)
else:
symbol_prec = price_precision
big_price = price * pow(10, symbol_prec)
price = ceil(big_price) / pow(10, symbol_prec)
return round(float(str(price_str - missing + precision)), 14)
return price
elif precisionMode in (SIGNIFICANT_DIGITS, DECIMAL_PLACES):
ndigits = round(price_precision)
if rounding_mode == ROUND:
return round(price, ndigits)
ticks = price * (10**ndigits)
if rounding_mode == ROUND_UP:
return ceil(ticks) / (10**ndigits)
if rounding_mode == TRUNCATE:
return int(ticks) / (10**ndigits)
if rounding_mode == ROUND_DOWN:
return floor(ticks) / (10**ndigits)
raise ValueError(f"Unknown rounding_mode {rounding_mode}")
raise ValueError(f"Unknown precisionMode {precisionMode}")
return price