"""NixMsg SDK 错误。"""

from __future__ import annotations


class NixMsgError(Exception):
    def __init__(self, code: str, message: str = "") -> None:
        self.code = code
        self.message = message or code
        super().__init__(self.message)


class NotConnectedError(NixMsgError):
    def __init__(self, message: str = "未连接") -> None:
        super().__init__("not_connected", message)


class ClosedError(NixMsgError):
    def __init__(self, message: str = "已关闭") -> None:
        super().__init__("closed", message)