diff --git a/docs/.vuepress/config.js b/docs/.vuepress/config.js
index d9d942ab..5d7cf2fb 100644
--- a/docs/.vuepress/config.js
+++ b/docs/.vuepress/config.js
@@ -198,6 +198,10 @@ module.exports = context => ({
                 {
                   title: "nonebot.adapters.cqhttp 模块",
                   path: "adapters/cqhttp"
+                },
+                {
+                  title: "nonebot.adapters.ding 模块",
+                  path: "adapters/ding"
                 }
               ]
             }
diff --git a/docs/api/README.md b/docs/api/README.md
index 810b1964..243733f8 100644
--- a/docs/api/README.md
+++ b/docs/api/README.md
@@ -47,3 +47,6 @@
 
 
     * [nonebot.adapters.cqhttp](adapters/cqhttp.html)
+
+
+    * [nonebot.adapters.ding](adapters/ding.html)
diff --git a/docs/api/adapters/cqhttp.md b/docs/api/adapters/cqhttp.md
index 6dd7f4a9..b80d6ad1 100644
--- a/docs/api/adapters/cqhttp.md
+++ b/docs/api/adapters/cqhttp.md
@@ -4,3 +4,439 @@ sidebarDepth: 0
 ---
 
 # NoneBot.adapters.cqhttp 模块
+
+
+## `escape(s, *, escape_comma=True)`
+
+
+* **说明**
+
+    对字符串进行 CQ 码转义。
+
+
+
+* **参数**
+
+    
+    * `s: str`: 需要转义的字符串
+
+
+    * `escape_comma: bool`: 是否转义逗号（`,`）。
+
+
+
+## `unescape(s)`
+
+
+* **说明**
+
+    对字符串进行 CQ 码去转义。
+
+
+
+* **参数**
+
+    
+    * `s: str`: 需要转义的字符串
+
+
+
+## _exception_ `CQHTTPAdapterException`
+
+基类：[`nonebot.exception.AdapterException`](../exception.md#nonebot.exception.AdapterException)
+
+
+## _exception_ `ActionFailed`
+
+基类：[`nonebot.exception.ActionFailed`](../exception.md#nonebot.exception.ActionFailed), `nonebot.adapters.cqhttp.exception.CQHTTPAdapterException`
+
+
+* **说明**
+
+    API 请求返回错误信息。
+
+
+
+* **参数**
+
+    
+    * `retcode: Optional[int]`: 错误码
+
+
+
+## _exception_ `NetworkError`
+
+基类：[`nonebot.exception.NetworkError`](../exception.md#nonebot.exception.NetworkError), `nonebot.adapters.cqhttp.exception.CQHTTPAdapterException`
+
+
+* **说明**
+
+    网络错误。
+
+
+
+* **参数**
+
+    
+    * `retcode: Optional[int]`: 错误码
+
+
+
+## _exception_ `ApiNotAvailable`
+
+基类：[`nonebot.exception.ApiNotAvailable`](../exception.md#nonebot.exception.ApiNotAvailable), `nonebot.adapters.cqhttp.exception.CQHTTPAdapterException`
+
+
+## _async_ `_check_reply(bot, event)`
+
+
+* **说明**
+
+    检查消息中存在的回复，去除并赋值 `event.reply`, `event.to_me`
+
+
+
+* **参数**
+
+    
+    * `bot: Bot`: Bot 对象
+
+
+    * `event: Event`: Event 对象
+
+
+
+## `_check_at_me(bot, event)`
+
+
+* **说明**
+
+    检查消息开头或结尾是否存在 @机器人，去除并赋值 `event.to_me`
+
+
+
+* **参数**
+
+    
+    * `bot: Bot`: Bot 对象
+
+
+    * `event: Event`: Event 对象
+
+
+
+## `_check_nickname(bot, event)`
+
+
+* **说明**
+
+    检查消息开头是否存在，去除并赋值 `event.to_me`
+
+
+
+* **参数**
+
+    
+    * `bot: Bot`: Bot 对象
+
+
+    * `event: Event`: Event 对象
+
+
+
+## `_handle_api_result(result)`
+
+
+* **说明**
+
+    处理 API 请求返回值。
+
+
+
+* **参数**
+
+    
+    * `result: Optional[Dict[str, Any]]`: API 返回数据
+
+
+
+* **返回**
+
+    
+    * `Any`: API 调用返回数据
+
+
+
+* **异常**
+
+    
+    * `ActionFailed`: API 调用失败
+
+
+
+## _class_ `Bot`
+
+基类：[`nonebot.adapters.BaseBot`](README.md#nonebot.adapters.BaseBot)
+
+CQHTTP 协议 Bot 适配。继承属性参考 [BaseBot](./#class-basebot) 。
+
+
+### _property_ `type`
+
+
+* 返回: `"cqhttp"`
+
+
+### _async classmethod_ `check_permission(driver, connection_type, headers, body)`
+
+
+* **说明**
+
+    CQHTTP (OneBot) 协议鉴权。参考 [鉴权](https://github.com/howmanybots/onebot/blob/master/v11/specs/communication/authorization.md)
+
+
+
+### _async_ `handle_message(message)`
+
+
+* **说明**
+
+    调用 [_check_reply](#async-check-reply-bot-event), [_check_at_me](#check-at-me-bot-event), [_check_nickname](#check-nickname-bot-event) 处理事件并转换为 [Event](#class-event)
+
+
+
+### _async_ `call_api(api, **data)`
+
+
+* **说明**
+
+    调用 CQHTTP 协议 API
+
+
+
+* **参数**
+
+    
+    * `api: str`: API 名称
+
+
+    * `**data: Any`: API 参数
+
+
+
+* **返回**
+
+    
+    * `Any`: API 调用返回数据
+
+
+
+* **异常**
+
+    
+    * `NetworkError`: 网络错误
+
+
+    * `ActionFailed`: API 调用失败
+
+
+
+### _async_ `send(event, message, at_sender=False, **kwargs)`
+
+
+* **说明**
+
+    根据 `event`  向触发事件的主体发送消息。
+
+
+
+* **参数**
+
+    
+    * `event: Event`: Event 对象
+
+
+    * `message: Union[str, Message, MessageSegment]`: 要发送的消息
+
+
+    * `at_sender: bool`: 是否 @ 事件主体
+
+
+    * `**kwargs`: 覆盖默认参数
+
+
+
+* **返回**
+
+    
+    * `Any`: API 调用返回数据
+
+
+
+* **异常**
+
+    
+    * `ValueError`: 缺少 `user_id`, `group_id`
+
+
+    * `NetworkError`: 网络错误
+
+
+    * `ActionFailed`: API 调用失败
+
+
+
+## _class_ `Event`
+
+基类：[`nonebot.adapters.BaseEvent`](README.md#nonebot.adapters.BaseEvent)
+
+CQHTTP 协议 Event 适配。继承属性参考 [BaseEvent](./#class-baseevent) 。
+
+
+### _property_ `id`
+
+
+* 类型: `Optional[int]`
+
+
+* 说明: 事件/消息 ID
+
+
+### _property_ `name`
+
+
+* 类型: `str`
+
+
+* 说明: 事件名称，由类型与 `.` 组合而成
+
+
+### _property_ `self_id`
+
+
+* 类型: `str`
+
+
+* 说明: 机器人自身 ID
+
+
+### _property_ `time`
+
+
+* 类型: `int`
+
+
+* 说明: 事件发生时间
+
+
+### _property_ `type`
+
+
+* 类型: `str`
+
+
+* 说明: 事件类型
+
+
+### _property_ `detail_type`
+
+
+* 类型: `str`
+
+
+* 说明: 事件详细类型
+
+
+### _property_ `sub_type`
+
+
+* 类型: `Optional[str]`
+
+
+* 说明: 事件子类型
+
+
+### _property_ `user_id`
+
+
+* 类型: `Optional[int]`
+
+
+* 说明: 事件主体 ID
+
+
+### _property_ `group_id`
+
+
+* 类型: `Optional[int]`
+
+
+* 说明: 事件主体群 ID
+
+
+### _property_ `to_me`
+
+
+* 类型: `Optional[bool]`
+
+
+* 说明: 消息是否与机器人相关
+
+
+### _property_ `message`
+
+
+* 类型: `Optional[Message]`
+
+
+* 说明: 消息内容
+
+
+### _property_ `reply`
+
+
+* 类型: `Optional[dict]`
+
+
+* 说明: 回复消息详情
+
+
+### _property_ `raw_message`
+
+
+* 类型: `Optional[str]`
+
+
+* 说明: 原始消息
+
+
+### _property_ `plain_text`
+
+
+* 类型: `Optional[str]`
+
+
+* 说明: 纯文本消息内容
+
+
+### _property_ `sender`
+
+
+* 类型: `Optional[dict]`
+
+
+* 说明: 消息发送者信息
+
+
+## _class_ `MessageSegment`
+
+基类：[`nonebot.adapters.BaseMessageSegment`](README.md#nonebot.adapters.BaseMessageSegment)
+
+CQHTTP 协议 MessageSegment 适配。具体方法参考协议消息段类型或源码。
+
+
+## _class_ `Message`
+
+基类：[`nonebot.adapters.BaseMessage`](README.md#nonebot.adapters.BaseMessage)
+
+CQHTTP 协议 Message 适配。
diff --git a/docs_build/README.rst b/docs_build/README.rst
index 9f40afa9..95ffcc2d 100644
--- a/docs_build/README.rst
+++ b/docs_build/README.rst
@@ -17,3 +17,4 @@ NoneBot Api Reference
   - `nonebot.drivers.fastapi <drivers/fastapi.html>`_
   - `nonebot.adapters <adapters/>`_
   - `nonebot.adapters.cqhttp <adapters/cqhttp.html>`_
+  - `nonebot.adapters.ding <adapters/ding.html>`_
diff --git a/docs_build/adapters/cqhttp.rst b/docs_build/adapters/cqhttp.rst
index 3e63952b..4714296d 100644
--- a/docs_build/adapters/cqhttp.rst
+++ b/docs_build/adapters/cqhttp.rst
@@ -6,7 +6,28 @@ sidebarDepth: 0
 NoneBot.adapters.cqhttp 模块
 ============================
 
-.. automodule:: nonebot.adapters.cqhttp
+.. automodule:: nonebot.adapters.cqhttp.utils
+   :members:
+   :show-inheritance:
+
+.. automodule:: nonebot.adapters.cqhttp.exception
+   :members:
+   :show-inheritance:
+
+
+.. automodule:: nonebot.adapters.cqhttp.bot
+   :members:
+   :private-members:
+   :show-inheritance:
+
+
+.. automodule:: nonebot.adapters.cqhttp.event
+   :members:
+   :private-members:
+   :show-inheritance:
+
+
+.. automodule:: nonebot.adapters.cqhttp.message
    :members:
    :private-members:
    :show-inheritance:
diff --git a/nonebot/adapters/cqhttp/__init__.py b/nonebot/adapters/cqhttp/__init__.py
index 5de85a92..8271c1e6 100644
--- a/nonebot/adapters/cqhttp/__init__.py
+++ b/nonebot/adapters/cqhttp/__init__.py
@@ -10,7 +10,7 @@ CQHTTP (OneBot) v11 协议适配
     https://github.com/howmanybots/onebot/blob/master/README.md
 """
 
-from .utils import log
 from .event import Event
 from .message import Message, MessageSegment
-from .bot import Bot, _check_at_me, _check_nickname, _check_reply
+from .utils import log, escape, unescape, _b2s
+from .bot import Bot, _check_at_me, _check_nickname, _check_reply, _handle_api_result
diff --git a/nonebot/adapters/cqhttp/bot.py b/nonebot/adapters/cqhttp/bot.py
index 5c7ac7a4..af673ec9 100644
--- a/nonebot/adapters/cqhttp/bot.py
+++ b/nonebot/adapters/cqhttp/bot.py
@@ -10,14 +10,24 @@ from nonebot.log import logger
 from nonebot.config import Config
 from nonebot.adapters import BaseBot
 from nonebot.message import handle_event
+from nonebot.exception import RequestDenied
 from nonebot.typing import Any, Dict, Union, Optional
 from nonebot.typing import overrides, Driver, WebSocket, NoReturn
-from nonebot.exception import NetworkError, RequestDenied, ApiNotAvailable
 
 from .event import Event
-from .exception import ApiError
-from .utils import log, get_auth_bearer
 from .message import Message, MessageSegment
+from .exception import NetworkError, ApiNotAvailable, ActionFailed
+from .utils import log
+
+
+def get_auth_bearer(
+        access_token: Optional[str] = None) -> Union[Optional[str], NoReturn]:
+    if not access_token:
+        return None
+    scheme, _, param = access_token.partition(" ")
+    if scheme.lower() not in ["bearer", "token"]:
+        raise RequestDenied(401, "Not authenticated")
+    return param
 
 
 async def _check_reply(bot: "Bot", event: "Event"):
@@ -160,11 +170,11 @@ def _handle_api_result(
 
     :异常:
 
-        - ``ApiError``: API 调用失败
+        - ``ActionFailed``: API 调用失败
     """
     if isinstance(result, dict):
         if result.get("status") == "failed":
-            raise ApiError(retcode=result.get("retcode"))
+            raise ActionFailed(retcode=result.get("retcode"))
         return result.get("data")
 
 
@@ -318,7 +328,7 @@ class Bot(BaseBot):
         :异常:
 
           - ``NetworkError``: 网络错误
-          - ``ApiError``: API 调用失败
+          - ``ActionFailed``: API 调用失败
         """
         if "self_id" in data:
             self_id = data.pop("self_id")
@@ -393,7 +403,7 @@ class Bot(BaseBot):
 
           - ``ValueError``: 缺少 ``user_id``, ``group_id``
           - ``NetworkError``: 网络错误
-          - ``ApiError``: API 调用失败
+          - ``ActionFailed``: API 调用失败
         """
         msg = message if isinstance(message, Message) else Message(message)
 
diff --git a/nonebot/adapters/cqhttp/__init__.pyi b/nonebot/adapters/cqhttp/bot.pyi
similarity index 78%
rename from nonebot/adapters/cqhttp/__init__.pyi
rename to nonebot/adapters/cqhttp/bot.pyi
index e5398588..745b4941 100644
--- a/nonebot/adapters/cqhttp/__init__.pyi
+++ b/nonebot/adapters/cqhttp/bot.pyi
@@ -1,12 +1,11 @@
 import asyncio
 
 from nonebot.config import Config
-from nonebot.adapters import BaseBot, BaseEvent, BaseMessage, BaseMessageSegment
-from nonebot.typing import Any, Dict, List, Union, Driver, Optional, NoReturn, WebSocket, Iterable
+from nonebot.adapters import BaseBot
+from nonebot.typing import Any, Dict, List, Union, Driver, Optional, NoReturn, WebSocket
 
-
-def log(level: str, message: str):
-    ...
+from .event import Event
+from .message import Message, MessageSegment
 
 
 def get_auth_bearer(
@@ -14,27 +13,15 @@ def get_auth_bearer(
     ...
 
 
-def escape(s: str, *, escape_comma: bool = ...) -> str:
+async def _check_reply(bot: "Bot", event: Event):
     ...
 
 
-def unescape(s: str) -> str:
+def _check_at_me(bot: "Bot", event: Event):
     ...
 
 
-def _b2s(b: Optional[bool]) -> Optional[str]:
-    ...
-
-
-async def _check_reply(bot: "Bot", event: "Event"):
-    ...
-
-
-def _check_at_me(bot: "Bot", event: "Event"):
-    ...
-
-
-def _check_nickname(bot: "Bot", event: "Event"):
+def _check_nickname(bot: "Bot", event: Event):
     ...
 
 
@@ -86,8 +73,8 @@ class Bot(BaseBot):
     async def call_api(self, api: str, **data) -> Union[Any, NoReturn]:
         ...
 
-    async def send(self, event: "Event", message: Union[str, "Message",
-                                                        "MessageSegment"],
+    async def send(self, event: Event, message: Union[str, Message,
+                                                      MessageSegment],
                    **kwargs) -> Union[Any, NoReturn]:
         ...
 
@@ -759,242 +746,3 @@ class Bot(BaseBot):
           * ``self_id``: 机器人 QQ 号
         """
         ...
-
-
-class Event(BaseEvent):
-
-    def __init__(self, raw_event: dict):
-        ...
-
-    @property
-    def id(self) -> Optional[int]:
-        ...
-
-    @property
-    def name(self) -> str:
-        ...
-
-    @property
-    def self_id(self) -> str:
-        ...
-
-    @property
-    def time(self) -> int:
-        ...
-
-    @property
-    def type(self) -> str:
-        ...
-
-    @type.setter
-    def type(self, value) -> None:
-        ...
-
-    @property
-    def detail_type(self) -> str:
-        ...
-
-    @detail_type.setter
-    def detail_type(self, value) -> None:
-        ...
-
-    @property
-    def sub_type(self) -> Optional[str]:
-        ...
-
-    @sub_type.setter
-    def sub_type(self, value) -> None:
-        ...
-
-    @property
-    def user_id(self) -> Optional[int]:
-        ...
-
-    @user_id.setter
-    def user_id(self, value) -> None:
-        ...
-
-    @property
-    def group_id(self) -> Optional[int]:
-        ...
-
-    @group_id.setter
-    def group_id(self, value) -> None:
-        ...
-
-    @property
-    def to_me(self) -> Optional[bool]:
-        ...
-
-    @to_me.setter
-    def to_me(self, value) -> None:
-        ...
-
-    @property
-    def message(self) -> Optional["Message"]:
-        ...
-
-    @message.setter
-    def message(self, value) -> None:
-        ...
-
-    @property
-    def reply(self) -> Optional[dict]:
-        ...
-
-    @reply.setter
-    def reply(self, value) -> None:
-        ...
-
-    @property
-    def raw_message(self) -> Optional[str]:
-        ...
-
-    @raw_message.setter
-    def raw_message(self, value) -> None:
-        ...
-
-    @property
-    def plain_text(self) -> Optional[str]:
-        ...
-
-    @property
-    def sender(self) -> Optional[dict]:
-        ...
-
-    @sender.setter
-    def sender(self, value) -> None:
-        ...
-
-
-class MessageSegment(BaseMessageSegment):
-
-    def __init__(self, type: str, data: Dict[str, Any]) -> None:
-        ...
-
-    def __str__(self):
-        ...
-
-    def __add__(self, other) -> "Message":
-        ...
-
-    @staticmethod
-    def anonymous(ignore_failure: Optional[bool] = ...) -> "MessageSegment":
-        ...
-
-    @staticmethod
-    def at(user_id: Union[int, str]) -> "MessageSegment":
-        ...
-
-    @staticmethod
-    def contact_group(group_id: int) -> "MessageSegment":
-        ...
-
-    @staticmethod
-    def contact_user(user_id: int) -> "MessageSegment":
-        ...
-
-    @staticmethod
-    def dice() -> "MessageSegment":
-        ...
-
-    @staticmethod
-    def face(id_: int) -> "MessageSegment":
-        ...
-
-    @staticmethod
-    def forward(id_: str) -> "MessageSegment":
-        ...
-
-    @staticmethod
-    def image(file: str,
-              type_: Optional[str] = ...,
-              cache: bool = ...,
-              proxy: bool = ...,
-              timeout: Optional[int] = ...) -> "MessageSegment":
-        ...
-
-    @staticmethod
-    def json(data: str) -> "MessageSegment":
-        ...
-
-    @staticmethod
-    def location(latitude: float,
-                 longitude: float,
-                 title: Optional[str] = ...,
-                 content: Optional[str] = ...) -> "MessageSegment":
-        ...
-
-    @staticmethod
-    def music(type_: str, id_: int) -> "MessageSegment":
-        ...
-
-    @staticmethod
-    def music_custom(url: str,
-                     audio: str,
-                     title: str,
-                     content: Optional[str] = ...,
-                     img_url: Optional[str] = ...) -> "MessageSegment":
-        ...
-
-    @staticmethod
-    def node(id_: int) -> "MessageSegment":
-        ...
-
-    @staticmethod
-    def node_custom(user_id: int, nickname: str,
-                    content: Union[str, "Message"]) -> "MessageSegment":
-        ...
-
-    @staticmethod
-    def poke(type_: str, id_: str) -> "MessageSegment":
-        ...
-
-    @staticmethod
-    def record(file: str,
-               magic: Optional[bool] = ...,
-               cache: Optional[bool] = ...,
-               proxy: Optional[bool] = ...,
-               timeout: Optional[int] = ...) -> "MessageSegment":
-        ...
-
-    @staticmethod
-    def reply(id_: int) -> "MessageSegment":
-        ...
-
-    @staticmethod
-    def rps() -> "MessageSegment":
-        ...
-
-    @staticmethod
-    def shake() -> "MessageSegment":
-        ...
-
-    @staticmethod
-    def share(url: str = ...,
-              title: str = ...,
-              content: Optional[str] = ...,
-              img_url: Optional[str] = ...) -> "MessageSegment":
-        ...
-
-    @staticmethod
-    def text(text: str) -> "MessageSegment":
-        ...
-
-    @staticmethod
-    def video(file: str,
-              cache: Optional[bool] = ...,
-              proxy: Optional[bool] = ...,
-              timeout: Optional[int] = ...) -> "MessageSegment":
-        ...
-
-    @staticmethod
-    def xml(data: str) -> "MessageSegment":
-        ...
-
-
-class Message(BaseMessage):
-
-    @staticmethod
-    def _construct(msg: Union[str, dict, list]) -> Iterable[MessageSegment]:
-        ...
diff --git a/nonebot/adapters/cqhttp/event.py b/nonebot/adapters/cqhttp/event.py
index f3071151..5bc959c9 100644
--- a/nonebot/adapters/cqhttp/event.py
+++ b/nonebot/adapters/cqhttp/event.py
@@ -1,6 +1,5 @@
-from nonebot.typing import overrides
-from nonebot.typing import Optional
 from nonebot.adapters import BaseEvent
+from nonebot.typing import Optional, overrides
 
 from .message import Message
 
diff --git a/nonebot/adapters/cqhttp/exception.py b/nonebot/adapters/cqhttp/exception.py
index 86fe963c..2bcc73f4 100644
--- a/nonebot/adapters/cqhttp/exception.py
+++ b/nonebot/adapters/cqhttp/exception.py
@@ -1,4 +1,8 @@
-from nonebot.exception import AdapterException, ActionFailed
+from nonebot.typing import Optional
+from nonebot.exception import (AdapterException, ActionFailed as
+                               BaseActionFailed, NetworkError as
+                               BaseNetworkError, ApiNotAvailable as
+                               BaseApiNotAvailable)
 
 
 class CQHTTPAdapterException(AdapterException):
@@ -7,7 +11,7 @@ class CQHTTPAdapterException(AdapterException):
         super().__init__("cqhttp")
 
 
-class ApiError(CQHTTPAdapterException, ActionFailed):
+class ActionFailed(BaseActionFailed, CQHTTPAdapterException):
     """
     :说明:
 
@@ -27,3 +31,29 @@ class ApiError(CQHTTPAdapterException, ActionFailed):
 
     def __str__(self):
         return self.__repr__()
+
+
+class NetworkError(BaseNetworkError, CQHTTPAdapterException):
+    """
+    :说明:
+
+      网络错误。
+
+    :参数:
+
+      * ``retcode: Optional[int]``: 错误码
+    """
+
+    def __init__(self, msg: Optional[str] = None):
+        super().__init__()
+        self.msg = msg
+
+    def __repr__(self):
+        return f"<NetWorkError message={self.msg}>"
+
+    def __str__(self):
+        return self.__repr__()
+
+
+class ApiNotAvailable(BaseApiNotAvailable, CQHTTPAdapterException):
+    pass
diff --git a/nonebot/adapters/cqhttp/message.py b/nonebot/adapters/cqhttp/message.py
index b9f317e0..f411aa2b 100644
--- a/nonebot/adapters/cqhttp/message.py
+++ b/nonebot/adapters/cqhttp/message.py
@@ -3,6 +3,7 @@ import re
 from nonebot.typing import overrides
 from nonebot.typing import Any, Dict, Union, Tuple, Iterable, Optional
 from nonebot.adapters import BaseMessage, BaseMessageSegment
+
 from .utils import log, escape, unescape, _b2s
 
 
diff --git a/nonebot/adapters/cqhttp/utils.py b/nonebot/adapters/cqhttp/utils.py
index 40661891..ecfee872 100644
--- a/nonebot/adapters/cqhttp/utils.py
+++ b/nonebot/adapters/cqhttp/utils.py
@@ -1,21 +1,9 @@
-from nonebot.typing import NoReturn
-from nonebot.typing import Union, Optional
-from nonebot.exception import RequestDenied
+from nonebot.typing import Optional
 from nonebot.utils import logger_wrapper
 
 log = logger_wrapper("CQHTTP")
 
 
-def get_auth_bearer(
-        access_token: Optional[str] = None) -> Union[Optional[str], NoReturn]:
-    if not access_token:
-        return None
-    scheme, _, param = access_token.partition(" ")
-    if scheme.lower() not in ["bearer", "token"]:
-        raise RequestDenied(401, "Not authenticated")
-    return param
-
-
 def escape(s: str, *, escape_comma: bool = True) -> str:
     """
     :说明:
diff --git a/nonebot/exception.py b/nonebot/exception.py
index b97c3f08..6a4b65dc 100644
--- a/nonebot/exception.py
+++ b/nonebot/exception.py
@@ -6,8 +6,6 @@
 这些异常并非所有需要用户处理，在 NoneBot 内部运行时被捕获，并进行对应操作。
 """
 
-from nonebot.typing import Optional
-
 
 class NoneBotException(Exception):
     """