dekun
a1abe159fa
Add deploy/manage.sh bootstrap for git.bz121.com/dekun/crypto_okx and point docs at this repo. Co-authored-by: Cursor <cursoragent@cursor.com>
42 lines
1.2 KiB
Python
42 lines
1.2 KiB
Python
"""Exchange amount/price precision helpers for hedge and local trading."""
|
|
|
|
from __future__ import annotations
|
|
|
|
from typing import Any, Optional
|
|
|
|
|
|
def _decimals_from_precision_value(value: Any) -> Optional[int]:
|
|
if value in (None, ""):
|
|
return None
|
|
try:
|
|
p = float(value)
|
|
except (TypeError, ValueError):
|
|
return None
|
|
if p >= 1 and abs(p - round(p)) < 1e-9 and p <= 12:
|
|
return int(round(p))
|
|
if 0 < p < 1:
|
|
s = f"{p:.12f}".rstrip("0")
|
|
if "." in s:
|
|
return min(12, len(s.split(".", 1)[1]))
|
|
return None
|
|
|
|
|
|
def _decimals_from_ccxt_str(text: str) -> int:
|
|
s = str(text or "").strip()
|
|
if not s or "." not in s:
|
|
return 0
|
|
frac = s.split(".", 1)[1]
|
|
if not frac:
|
|
return 0
|
|
return min(12, len(frac.rstrip("0") or frac))
|
|
|
|
|
|
def amount_decimals_from_exchange(exchange: Any, exchange_symbol: str) -> int:
|
|
try:
|
|
return _decimals_from_ccxt_str(exchange.amount_to_precision(exchange_symbol, 1.23456789))
|
|
except Exception:
|
|
market = exchange.market(exchange_symbol)
|
|
prec = (market.get("precision") or {}).get("amount")
|
|
d = _decimals_from_precision_value(prec)
|
|
return d if d is not None else 4
|