def build_signature_base_string(self, oauth_request, consumer, token):
        sig = (
            escape(oauth_request.get_normalized_http_method()),
            escape(oauth_request.get_normalized_http_url()),
            escape(oauth_request.get_normalized_parameters()),
        )

        key = escape(consumer.secret) % '%s&'
        if token:
            key += escape(token.secret)
        raw = '&'.join(sig)
        return key, raw
dataset/ETHPy150Open benadida/helios-server/helios_auth/security/oauth.py/OAuthSignatureMethod_HMAC_SHA1.build_signature_base_string/swapped operands of `%`