diff --git a/nonebot/__init__.py b/nonebot/__init__.py
index 54a409ce..1611e714 100644
--- a/nonebot/__init__.py
+++ b/nonebot/__init__.py
@@ -7,19 +7,18 @@ from ipaddress import IPv4Address
 
 from nonebot.log import logger
 from nonebot.config import Env, Config
-from nonebot.drivers import BaseDriver
 from nonebot.adapters.cqhttp import Bot as CQBot
-from nonebot.typing import Union, Optional, NoReturn
+from nonebot.typing import Type, Union, Driver, Optional, NoReturn
 
 try:
     import nonebot_test
 except ImportError:
     nonebot_test = None
 
-_driver: Optional[BaseDriver] = None
+_driver: Optional[Driver] = None
 
 
-def get_driver() -> Union[NoReturn, BaseDriver]:
+def get_driver() -> Union[NoReturn, Driver]:
     if _driver is None:
         raise ValueError("NoneBot has not been initialized.")
     return _driver
@@ -43,14 +42,16 @@ def init(*, _env_file: Optional[str] = None, **kwargs):
     logger.setLevel(logging.DEBUG if config.debug else logging.INFO)
     logger.debug(f"Loaded config: {config.dict()}")
 
-    Driver = getattr(importlib.import_module(config.driver), "Driver")
-    _driver = Driver(env, config)
+    DriverClass: Type[Driver] = getattr(importlib.import_module(config.driver),
+                                        "Driver")
+    _driver = DriverClass(env, config)
 
     # register build-in adapters
     _driver.register_adapter("cqhttp", CQBot)
 
     # load nonebot test frontend if debug
     if config.debug and nonebot_test:
+        logger.debug("Loading nonebot test frontend...")
         nonebot_test.init()
 
 
diff --git a/nonebot/adapters/__init__.py b/nonebot/adapters/__init__.py
index 04183a24..11b639b2 100644
--- a/nonebot/adapters/__init__.py
+++ b/nonebot/adapters/__init__.py
@@ -6,7 +6,7 @@ from functools import reduce, partial
 from dataclasses import dataclass, field
 
 from nonebot.config import Config
-from nonebot.typing import Driver, WebSocket
+from nonebot.typing import Driver, Message, WebSocket
 from nonebot.typing import Any, Dict, Union, Optional, Callable, Iterable, Awaitable
 
 
@@ -83,6 +83,26 @@ class BaseEvent(abc.ABC):
     def sub_type(self, value) -> None:
         raise NotImplementedError
 
+    @property
+    @abc.abstractmethod
+    def message(self) -> Optional[Message]:
+        raise NotImplementedError
+
+    @message.setter
+    @abc.abstractmethod
+    def message(self, value) -> None:
+        raise NotImplementedError
+
+    @property
+    @abc.abstractmethod
+    def raw_message(self) -> Optional[str]:
+        raise NotImplementedError
+
+    @raw_message.setter
+    @abc.abstractmethod
+    def raw_message(self, value) -> None:
+        raise NotImplementedError
+
 
 @dataclass
 class BaseMessageSegment(abc.ABC):
diff --git a/nonebot/adapters/cqhttp.py b/nonebot/adapters/cqhttp.py
index c1beaf7f..0b228b3d 100644
--- a/nonebot/adapters/cqhttp.py
+++ b/nonebot/adapters/cqhttp.py
@@ -193,6 +193,26 @@ class Event(BaseEvent):
     def sub_type(self, value) -> None:
         self._raw_event["sub_type"] = value
 
+    @property
+    @overrides(BaseEvent)
+    def message(self) -> Optional["Message"]:
+        return self._raw_event.get("message")
+
+    @message.setter
+    @overrides(BaseEvent)
+    def message(self, value) -> None:
+        self._raw_event["message"] = value
+
+    @property
+    @overrides(BaseEvent)
+    def raw_message(self) -> Optional[str]:
+        return self._raw_event.get("raw_message")
+
+    @raw_message.setter
+    @overrides(BaseEvent)
+    def raw_message(self, value) -> None:
+        self._raw_event["raw_message"] = value
+
 
 class MessageSegment(BaseMessageSegment):
 
diff --git a/nonebot/drivers/__init__.py b/nonebot/drivers/__init__.py
index baef3455..4d0f398b 100644
--- a/nonebot/drivers/__init__.py
+++ b/nonebot/drivers/__init__.py
@@ -4,6 +4,7 @@
 import abc
 from ipaddress import IPv4Address
 
+from nonebot.log import logger
 from nonebot.config import Env, Config
 from nonebot.typing import Bot, Dict, Type, Optional, Callable
 
@@ -20,6 +21,7 @@ class BaseDriver(abc.ABC):
     @classmethod
     def register_adapter(cls, name: str, adapter: Type[Bot]):
         cls._adapters[name] = adapter
+        logger.debug(f'Succeeded to load adapter "{name}"')
 
     @property
     @abc.abstractmethod
diff --git a/nonebot/drivers/fastapi.py b/nonebot/drivers/fastapi.py
index fd39985d..618d61cb 100644
--- a/nonebot/drivers/fastapi.py
+++ b/nonebot/drivers/fastapi.py
@@ -152,15 +152,16 @@ class Driver(BaseDriver):
         await websocket.accept()
         self._clients[x_self_id] = bot
 
-        while not websocket.closed:
-            data = await websocket.receive()
+        try:
+            while not websocket.closed:
+                data = await websocket.receive()
 
-            if not data:
-                continue
+                if not data:
+                    continue
 
-            await bot.handle_message(data)
-
-        del self._clients[x_self_id]
+                await bot.handle_message(data)
+        finally:
+            del self._clients[x_self_id]
 
 
 class WebSocket(BaseWebSocket):
diff --git a/nonebot/event.py b/nonebot/event.py
deleted file mode 100644
index 6f4db964..00000000
--- a/nonebot/event.py
+++ /dev/null
@@ -1,127 +0,0 @@
-#!/usr/bin/env python3
-# -*- coding: utf-8 -*-
-
-from nonebot.typing import Any, Dict, Optional
-
-
-class Event(dict):
-    """
-    封装从 CQHTTP 收到的事件数据对象（字典），提供属性以获取其中的字段。
-
-    除 `type` 和 `detail_type` 属性对于任何事件都有效外，其它属性存在与否（不存在则返回
-    `None`）依事件不同而不同。
-    """
-
-    @staticmethod
-    def from_payload(payload: Dict[str, Any]) -> Optional["Event"]:
-        """
-        从 CQHTTP 事件数据构造 `Event` 对象。
-        """
-        try:
-            e = Event(payload)
-            _ = e.type, e.detail_type
-            return e
-        except KeyError:
-            return None
-
-    @property
-    def type(self) -> str:
-        """
-        事件类型，有 ``message``、``notice``、``request``、``meta_event`` 等。
-        """
-        return self["post_type"]
-
-    @property
-    def detail_type(self) -> str:
-        """
-        事件具体类型，依 `type` 的不同而不同，以 ``message`` 类型为例，有
-        ``private``、``group``、``discuss`` 等。
-        """
-        return self[f"{self.type}_type"]
-
-    @property
-    def sub_type(self) -> Optional[str]:
-        """
-        事件子类型，依 `detail_type` 不同而不同，以 ``message.private`` 为例，有
-        ``friend``、``group``、``discuss``、``other`` 等。
-        """
-        return self.get("sub_type")
-
-    @property
-    def name(self):
-        """
-        事件名，对于有 `sub_type` 的事件，为 ``{type}.{detail_type}.{sub_type}``，否则为
-        ``{type}.{detail_type}``。
-        """
-        n = self.type + "." + self.detail_type
-        if self.sub_type:
-            n += "." + self.sub_type
-        return n
-
-    @property
-    def self_id(self) -> int:
-        """机器人自身 ID。"""
-        return self["self_id"]
-
-    @property
-    def user_id(self) -> Optional[int]:
-        """用户 ID。"""
-        return self.get("user_id")
-
-    @property
-    def operator_id(self) -> Optional[int]:
-        """操作者 ID。"""
-        return self.get("operator_id")
-
-    @property
-    def group_id(self) -> Optional[int]:
-        """群 ID。"""
-        return self.get("group_id")
-
-    @property
-    def discuss_id(self) -> Optional[int]:
-        """讨论组 ID。"""
-        return self.get("discuss_id")
-
-    @property
-    def message_id(self) -> Optional[int]:
-        """消息 ID。"""
-        return self.get("message_id")
-
-    @property
-    def message(self) -> Optional[Any]:
-        """消息。"""
-        return self.get("message")
-
-    @property
-    def raw_message(self) -> Optional[str]:
-        """未经 CQHTTP 处理的原始消息。"""
-        return self.get("raw_message")
-
-    @property
-    def sender(self) -> Optional[Dict[str, Any]]:
-        """消息发送者信息。"""
-        return self.get("sender")
-
-    @property
-    def anonymous(self) -> Optional[Dict[str, Any]]:
-        """匿名信息。"""
-        return self.get("anonymous")
-
-    @property
-    def file(self) -> Optional[Dict[str, Any]]:
-        """文件信息。"""
-        return self.get("file")
-
-    @property
-    def comment(self) -> Optional[str]:
-        """请求验证消息。"""
-        return self.get("comment")
-
-    @property
-    def flag(self) -> Optional[str]:
-        """请求标识。"""
-        return self.get("flag")
-
-    def __repr__(self) -> str:
-        return f"<Event, {super().__repr__()}>"
diff --git a/nonebot/plugin.py b/nonebot/plugin.py
index 5016aef2..a33c3527 100644
--- a/nonebot/plugin.py
+++ b/nonebot/plugin.py
@@ -7,8 +7,8 @@ import importlib
 
 from nonebot.log import logger
 from nonebot.matcher import Matcher
-from nonebot.typing import Set, Dict, Type, Optional, ModuleType
 from nonebot.rule import Rule, metaevent, message, notice, request
+from nonebot.typing import Set, Dict, Type, Union, Optional, ModuleType, RuleChecker
 
 plugins: Dict[str, "Plugin"] = {}
 
@@ -25,7 +25,7 @@ class Plugin(object):
         self.matchers = matchers
 
 
-def on_metaevent(rule: Rule,
+def on_metaevent(rule: Union[Rule, RuleChecker] = Rule(),
                  *,
                  handlers=[],
                  temp=False,
@@ -40,7 +40,7 @@ def on_metaevent(rule: Rule,
     return matcher
 
 
-def on_message(rule: Rule,
+def on_message(rule: Union[Rule, RuleChecker] = Rule(),
                *,
                handlers=[],
                temp=False,
@@ -55,7 +55,7 @@ def on_message(rule: Rule,
     return matcher
 
 
-def on_notice(rule: Rule,
+def on_notice(rule: Union[Rule, RuleChecker] = Rule(),
               *,
               handlers=[],
               temp=False,
@@ -70,7 +70,7 @@ def on_notice(rule: Rule,
     return matcher
 
 
-def on_request(rule: Rule,
+def on_request(rule: Union[Rule, RuleChecker] = Rule(),
                *,
                handlers=[],
                temp=False,
diff --git a/nonebot/rule.py b/nonebot/rule.py
index ab81489f..9caa9d30 100644
--- a/nonebot/rule.py
+++ b/nonebot/rule.py
@@ -2,81 +2,207 @@
 # -*- coding: utf-8 -*-
 
 import re
+import abc
+import asyncio
+from typing import cast
 
-from nonebot.event import Event
-from nonebot.typing import Union, Callable, Optional
+from nonebot.utils import run_sync
+from nonebot.typing import Bot, Event, Union, Optional, Awaitable
+from nonebot.typing import RuleChecker, SyncRuleChecker, AsyncRuleChecker
 
 
-class Rule:
+class BaseRule(abc.ABC):
 
-    def __init__(
-        self,
-        checker: Optional[Callable[["BaseBot", Event],  # type: ignore
-                                   bool]] = None):
-        self.checker = checker or (lambda bot, event: True)
+    def __init__(self, checker: RuleChecker):
+        self.checker: RuleChecker = checker
 
-    def __call__(self, bot, event: Event) -> bool:
+    @abc.abstractmethod
+    def __call__(self, bot: Bot, event: Event) -> Awaitable[bool]:
+        raise NotImplementedError
+
+    @abc.abstractmethod
+    def __and__(self, other: Union["BaseRule", RuleChecker]) -> "BaseRule":
+        raise NotImplementedError
+
+    @abc.abstractmethod
+    def __or__(self, other: Union["BaseRule", RuleChecker]) -> "BaseRule":
+        raise NotImplementedError
+
+    @abc.abstractmethod
+    def __neg__(self) -> "BaseRule":
+        raise NotImplementedError
+
+
+class AsyncRule(BaseRule):
+
+    def __init__(self, checker: Optional[AsyncRuleChecker] = None):
+
+        async def always_true(bot: Bot, event: Event) -> bool:
+            return True
+
+        self.checker: AsyncRuleChecker = checker or always_true
+
+    def __call__(self, bot: Bot, event: Event) -> Awaitable[bool]:
         return self.checker(bot, event)
 
-    def __and__(self, other: "Rule") -> "Rule":
-        return Rule(lambda bot, event: self.checker(bot, event) and other.
-                    checker(bot, event))
+    def __and__(self, other: Union[BaseRule, RuleChecker]) -> "AsyncRule":
+        func = other
+        if isinstance(other, BaseRule):
+            func = other.checker
 
-    def __or__(self, other: "Rule") -> "Rule":
-        return Rule(lambda bot, event: self.checker(bot, event) or other.
-                    checker(bot, event))
+        if not asyncio.iscoroutinefunction(func):
+            func = run_sync(func)
 
-    def __neg__(self) -> "Rule":
-        return Rule(lambda bot, event: not self.checker(bot, event))
+        async def tmp(bot: Bot, event: Event) -> bool:
+            a, b = await asyncio.gather(self.checker(bot, event),
+                                        func(bot, event))
+            return a and b
+
+        return AsyncRule(tmp)
+
+    def __or__(self, other: Union[BaseRule, RuleChecker]) -> "AsyncRule":
+        func = other
+        if isinstance(other, BaseRule):
+            func = other.checker
+
+        if not asyncio.iscoroutinefunction(func):
+            func = run_sync(func)
+
+        async def tmp(bot: Bot, event: Event) -> bool:
+            a, b = await asyncio.gather(self.checker(bot, event),
+                                        func(bot, event))
+            return a or b
+
+        return AsyncRule(tmp)
+
+    def __neg__(self) -> "AsyncRule":
+
+        async def neg(bot: Bot, event: Event) -> bool:
+            result = await self.checker(bot, event)
+            return not result
+
+        return AsyncRule(neg)
 
 
-def message() -> Rule:
+class SyncRule(BaseRule):
+
+    def __init__(self, checker: Optional[SyncRuleChecker] = None):
+
+        def always_true(bot: Bot, event: Event) -> bool:
+            return True
+
+        self.checker: SyncRuleChecker = checker or always_true
+
+    def __call__(self, bot: Bot, event: Event) -> Awaitable[bool]:
+        return run_sync(self.checker)(bot, event)
+
+    def __and__(self, other: Union[BaseRule, RuleChecker]) -> BaseRule:
+        func = other
+        if isinstance(other, BaseRule):
+            func = other.checker
+
+        if not asyncio.iscoroutinefunction(func):
+            # func: SyncRuleChecker
+            syncfunc = cast(SyncRuleChecker, func)
+
+            def tmp(bot: Bot, event: Event) -> bool:
+                return self.checker(bot, event) and syncfunc(bot, event)
+
+            return SyncRule(tmp)
+        else:
+            # func: AsyncRuleChecker
+            asyncfunc = cast(AsyncRuleChecker, func)
+
+            async def tmp(bot: Bot, event: Event) -> bool:
+                a, b = await asyncio.gather(
+                    run_sync(self.checker)(bot, event), asyncfunc(bot, event))
+                return a and b
+
+            return AsyncRule(tmp)
+
+    def __or__(self, other: Union[BaseRule, RuleChecker]) -> BaseRule:
+        func = other
+        if isinstance(other, BaseRule):
+            func = other.checker
+
+        if not asyncio.iscoroutinefunction(func):
+            # func: SyncRuleChecker
+            syncfunc = cast(SyncRuleChecker, func)
+
+            def tmp(bot: Bot, event: Event) -> bool:
+                return self.checker(bot, event) or syncfunc(bot, event)
+
+            return SyncRule(tmp)
+        else:
+            # func: AsyncRuleChecker
+            asyncfunc = cast(AsyncRuleChecker, func)
+
+            async def tmp(bot: Bot, event: Event) -> bool:
+                a, b = await asyncio.gather(
+                    run_sync(self.checker)(bot, event), asyncfunc(bot, event))
+                return a or b
+
+            return AsyncRule(tmp)
+
+    def __neg__(self) -> "SyncRule":
+
+        def neg(bot: Bot, event: Event) -> bool:
+            return not self.checker(bot, event)
+
+        return SyncRule(neg)
+
+
+def Rule(func: Optional[RuleChecker] = None) -> BaseRule:
+    if func and asyncio.iscoroutinefunction(func):
+        asyncfunc = cast(AsyncRuleChecker, func)
+        return AsyncRule(asyncfunc)
+    else:
+        syncfunc = cast(Optional[SyncRuleChecker], func)
+        return SyncRule(syncfunc)
+
+
+def message() -> BaseRule:
     return Rule(lambda bot, event: event.type == "message")
 
 
-def notice() -> Rule:
+def notice() -> BaseRule:
     return Rule(lambda bot, event: event.type == "notice")
 
 
-def request() -> Rule:
+def request() -> BaseRule:
     return Rule(lambda bot, event: event.type == "request")
 
 
-def metaevent() -> Rule:
+def metaevent() -> BaseRule:
     return Rule(lambda bot, event: event.type == "meta_event")
 
 
-def user(*qq: int) -> Rule:
+def user(*qq: int) -> BaseRule:
     return Rule(lambda bot, event: event.user_id in qq)
 
 
-def private() -> Rule:
+def private() -> BaseRule:
     return Rule(lambda bot, event: event.detail_type == "private")
 
 
-def group(*group: int) -> Rule:
+def group(*group: int) -> BaseRule:
     return Rule(lambda bot, event: event.detail_type == "group" and event.
                 group_id in group)
 
 
-def discuss(*discuss: int) -> Rule:
-    return Rule(lambda bot, event: event.detail_type == "discuss" and event.
-                discuss_id in discuss)
-
-
-def startswith(msg, start: int = None, end: int = None) -> Rule:
+def startswith(msg, start: int = None, end: int = None) -> BaseRule:
     return Rule(lambda bot, event: event.message.startswith(msg, start, end))
 
 
-def endswith(msg, start: int = None, end: int = None) -> Rule:
+def endswith(msg, start: int = None, end: int = None) -> BaseRule:
     return Rule(
         lambda bot, event: event.message.endswith(msg, start=None, end=None))
 
 
-def has(msg: str) -> Rule:
+def has(msg: str) -> BaseRule:
     return Rule(lambda bot, event: msg in event.message)
 
 
-def regex(regex, flags: Union[int, re.RegexFlag] = 0) -> Rule:
+def regex(regex, flags: Union[int, re.RegexFlag] = 0) -> BaseRule:
     pattern = re.compile(regex, flags)
     return Rule(lambda bot, event: bool(pattern.search(str(event.message))))
diff --git a/nonebot/typing.py b/nonebot/typing.py
index 816b62e2..21fe0389 100644
--- a/nonebot/typing.py
+++ b/nonebot/typing.py
@@ -8,6 +8,7 @@ from typing import Union, TypeVar, Optional, Iterable, Callable, Awaitable
 
 # import some modules needed when checking types
 if TYPE_CHECKING:
+    from nonebot.rule import BaseRule
     from nonebot.matcher import Matcher as MatcherClass
     from nonebot.drivers import BaseDriver, BaseWebSocket
     from nonebot.adapters import BaseBot, BaseEvent, BaseMessage, BaseMessageSegment
@@ -37,3 +38,8 @@ PreProcessor = Callable[[Bot, Event], Union[Awaitable[None],
 Matcher = TypeVar("Matcher", bound="MatcherClass")
 Handler = Callable[[Bot, Event, Dict[Any, Any]], Union[Awaitable[None],
                                                        Awaitable[NoReturn]]]
+Rule = TypeVar("Rule", bound="BaseRule")
+_RuleChecker_Return = TypeVar("_RuleChecker_Return", bool, Awaitable[bool])
+RuleChecker = Callable[[Bot, Event], _RuleChecker_Return]
+SyncRuleChecker = RuleChecker[Bot, Event, bool]
+AsyncRuleChecker = RuleChecker[Bot, Event, Awaitable[bool]]
diff --git a/nonebot/utils.py b/nonebot/utils.py
index c1c0ddf2..631395f5 100644
--- a/nonebot/utils.py
+++ b/nonebot/utils.py
@@ -2,9 +2,23 @@
 # -*- coding: utf-8 -*-
 
 import json
+import asyncio
 import dataclasses
+from functools import wraps, partial
 
-from nonebot.typing import overrides
+from nonebot.typing import Any, Callable, Awaitable, overrides
+
+
+def run_sync(func: Callable[..., Any]) -> Callable[..., Awaitable[Any]]:
+
+    @wraps(func)
+    async def _wrapper(*args: Any, **kwargs: Any) -> Any:
+        loop = asyncio.get_running_loop()
+        pfunc = partial(func, *args, **kwargs)
+        result = await loop.run_in_executor(None, pfunc)
+        return result
+
+    return _wrapper
 
 
 class DataclassEncoder(json.JSONEncoder):
diff --git a/poetry.lock b/poetry.lock
index 6208e3c7..032b4261 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -197,7 +197,7 @@ description = "Chromium HSTS Preload list as a Python package and updated daily"
 name = "hstspreload"
 optional = false
 python-versions = ">=3.6"
-version = "2020.8.11"
+version = "2020.8.12"
 
 [package.source]
 reference = "aliyun"
@@ -838,7 +838,7 @@ scheduler = ["apscheduler"]
 test = []
 
 [metadata]
-content-hash = "ceb51a95975f80d81b1901bb634cc58a583d31914a99495b12df4679d27fe531"
+content-hash = "b89641a9b24184b999991e1534842905ece528b73824eb79d6d378d686526da2"
 python-versions = "^3.7"
 
 [metadata.files]
@@ -891,8 +891,8 @@ hpack = [
     {file = "hpack-3.0.0.tar.gz", hash = "sha256:8eec9c1f4bfae3408a3f30500261f7e6a65912dc138526ea054f9ad98892e9d2"},
 ]
 hstspreload = [
-    {file = "hstspreload-2020.8.11-py3-none-any.whl", hash = "sha256:e9971e67ed1fe61da1ea4c145f6ebab4591e2cc934def81bbf9c37d20d0abab9"},
-    {file = "hstspreload-2020.8.11.tar.gz", hash = "sha256:88b102ce3cdc1b27bb117d407f886ed16e35522564f1a31d64373ccde33b19af"},
+    {file = "hstspreload-2020.8.12-py3-none-any.whl", hash = "sha256:64f4441066d5544873faccf2e0b5757c6670217d34dc31d362ca2977f44604ff"},
+    {file = "hstspreload-2020.8.12.tar.gz", hash = "sha256:3f5c324b1eb9d924e32ffeb5fe265b879806b6e346b765f57566410344f4b41e"},
 ]
 html2text = [
     {file = "html2text-2020.1.16-py3-none-any.whl", hash = "sha256:c7c629882da0cf377d66f073329ccf34a12ed2adf0169b9285ae4e63ef54c82b"},
diff --git a/tests/test_plugins/test_matcher.py b/tests/test_plugins/test_matcher.py
index fb36f821..2b59d4e9 100644
--- a/tests/test_plugins/test_matcher.py
+++ b/tests/test_plugins/test_matcher.py
@@ -6,9 +6,7 @@ from nonebot.typing import Event
 from nonebot.plugin import on_message
 from nonebot.adapters.cqhttp import Bot, Message
 
-print(repr(Message("asdfasdf[CQ:at,qq=123][CQ:at,qq=all]")))
-
-test_matcher = on_message(Rule(), state={"default": 1})
+test_matcher = on_message(state={"default": 1})
 
 
 @test_matcher.handle()
diff --git a/tests/test_plugins/test_metaevent.py b/tests/test_plugins/test_metaevent.py
index 3fb7360e..88f6a82f 100644
--- a/tests/test_plugins/test_metaevent.py
+++ b/tests/test_plugins/test_metaevent.py
@@ -1,18 +1,17 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 
-from nonebot.rule import Rule
-from nonebot.event import Event
 from nonebot.plugin import on_metaevent
+from nonebot.typing import Bot, Event
 
 
-def heartbeat(bot, event: Event) -> bool:
+def heartbeat(bot: Bot, event: Event) -> bool:
     return event.detail_type == "heartbeat"
 
 
-test_matcher = on_metaevent(Rule(heartbeat))
+test_matcher = on_metaevent(heartbeat)
 
 
 @test_matcher.handle()
-async def handle_heartbeat(bot, event: Event, state: dict):
+async def handle_heartbeat(bot: Bot, event: Event, state: dict):
     print("[i] Heartbeat")