code: def verify_signature(message, signature, public_key):
      
  
      try:
          ed25519_blake2.checkvalid(signature, message, public_key)
      except ed25519_blake2.SignatureMismatch:
          return False
      return True
docs: Verifies `signature` is correct for a `message` signed with `public_key`
  
      :param message: message to check
      :type message: bytes
  
      :param signature: signature to check
      :type signature: bytes
  
      :param public_key: public_key to check
      :type public_key: bytes
  
      :return: True if valid, False otherwise
      :rtype: bool