Bytes are still fine

CHANGELOG.rst

@@ -1,6 +1,12 @@
 Release History
 ===============
 
+1.3.2 (2025-11-XX)
+------------------
+
+- Fix type hints to allow BytesMessage to accept bytes again, as well as
+  bytearray.
+
 1.3.1 (2025-11-12)
 ------------------
 

src/wsproto/connection.py

@@ -191,7 +191,7 @@ def events(self) -> Generator[Event, None, None]:
                 elif frame.opcode is Opcode.BINARY:
                     assert isinstance(frame.payload, (bytes, bytearray))
                     yield BytesMessage(
-                        data=bytearray(frame.payload),
+                        data=frame.payload,
                         frame_finished=frame.frame_finished,
                         message_finished=frame.message_finished,
                     )

src/wsproto/events.py

@@ -4,6 +4,7 @@
 
 Events that result from processing data on a WebSocket connection.
 """
+
 from __future__ import annotations
 
 from abc import ABC
@@ -193,7 +194,7 @@ def response(self) -> CloseConnection:
         return CloseConnection(code=self.code, reason=self.reason)
 
 
-T = TypeVar("T", bytes, bytearray, str)
+T = TypeVar("T", bytes | bytearray, str)
 
 
 @dataclass(frozen=True)
@@ -242,26 +243,24 @@ class TextMessage(Message[str]):  # pylint: disable=unsubscriptable-object
        and reassemble these chunks to get the full message.
     """
 
-    data: str
-
 
 @dataclass(frozen=True)
-class BytesMessage(Message[bytearray]):  # pylint: disable=unsubscriptable-object
+class BytesMessage(
+    Message[bytearray | bytes]  # pylint: disable=unsubscriptable-object
+):
     """
     Fired when a data frame with BINARY payload is received.
 
     Fields:
 
     .. attribute:: data
 
-       The message data as bytearray, can be decoded as UTF-8 for
+       The message data as bytes or a bytearray, can be decoded as UTF-8 for
        TEXT messages.  This only represents a single chunk of data and
        not a full WebSocket message.  You need to buffer and
        reassemble these chunks to get the full message.
     """
 
-    data: bytearray
-
 
 @dataclass(frozen=True)
 class Ping(Event):