"""协议级退费登记金额校验"""

from __future__ import annotations

from decimal import Decimal
from typing import Any


def validate_refund_amount(amount: Any) -> Decimal:
    if amount is None or amount == "":
        raise ValueError("请填写退费金额")
    try:
        dec = Decimal(str(amount))
    except Exception as e:
        raise ValueError("退费金额无效") from e
    if dec <= 0:
        raise ValueError("退费金额必须大于 0")
    return dec