def METHOD_NAME(self, obj: models.Model, timestamp: int) -> str:
    # timestamp is number of days since 2020-1-1.  Converted to
    # base 36, this gives us a 3 digit string until about 2141
    ts_b36 = int_to_base36(timestamp)
    hash_string = salted_hmac(
        self.key_salt,
        self._make_hash_value(obj, timestamp),
        secret=self.secret,
    ).hexdigest()[
        ::2
    ]  # Limit to 20 characters to shorten the URL.
    return "%s-%s" % (ts_b36, hash_string)