Major fixes and new features

venv/lib/python3.12/site-packages/asyncpg/pgproto/codecs/bytea.pyx

@@ -0,0 +1,34 @@
+# Copyright (C) 2016-present the asyncpg authors and contributors
+# <see AUTHORS file>
+#
+# This module is part of asyncpg and is released under
+# the Apache 2.0 License: http://www.apache.org/licenses/LICENSE-2.0
+
+
+cdef bytea_encode(CodecContext settings, WriteBuffer wbuf, obj):
+    cdef:
+        Py_buffer pybuf
+        bint pybuf_used = False
+        char *buf
+        ssize_t len
+
+    if cpython.PyBytes_CheckExact(obj):
+        buf = cpython.PyBytes_AS_STRING(obj)
+        len = cpython.Py_SIZE(obj)
+    else:
+        cpython.PyObject_GetBuffer(obj, &pybuf, cpython.PyBUF_SIMPLE)
+        pybuf_used = True
+        buf = <char*>pybuf.buf
+        len = pybuf.len
+
+    try:
+        wbuf.write_int32(<int32_t>len)
+        wbuf.write_cstr(buf, len)
+    finally:
+        if pybuf_used:
+            cpython.PyBuffer_Release(&pybuf)
+
+
+cdef bytea_decode(CodecContext settings, FRBuffer *buf):
+    cdef ssize_t buf_len = buf.len
+    return cpython.PyBytes_FromStringAndSize(frb_read_all(buf), buf_len)