Prehashed not work

[aiddroid]

import base64
from tongsuopy.crypto import hashes, serialization
from tongsuopy.crypto.asymciphers import ec, utils

# SM2 keys
key = ec.generate_private_key(ec.SM2())

pem = key.public_key().public_bytes(
    encoding=serialization.Encoding.PEM,
    format=serialization.PublicFormat.SubjectPublicKeyInfo,
)
public_key = serialization.load_pem_public_key(pem)


message = "hello"
message_bytes = message.encode('utf-8')

signature_bytes = key.sign(
      message_bytes, 
      utils.Prehashed(hashes.SM3())
)

public_key.verify(
      signature_bytes, 
      message_bytes, 
      utils.Prehashed(hashes.SM3())
)

  File "/root/.pyenv/versions/3.9.16/lib/python3.9/site-packages/tongsuopy/backends/tongsuo/ec.py", line 262, in sign
    _check_signature_algorithm(signature_algorithm)
  File "/root/.pyenv/versions/3.9.16/lib/python3.9/site-packages/tongsuopy/backends/tongsuo/ec.py", line 28, in _check_signature_algorithm
    raise UnsupportedAlgorithm(
tongsuopy.crypto.exceptions.UnsupportedAlgorithm: Unsupported elliptic curve signature algorithm.