#!/usr/bin/env python3

# We'll likely need to update the request timestamp

import hashlib
import hmac
import base64


def make_digest(message, key):
    key = bytes(key, 'UTF-8')
    message = bytes(message, 'UTF-8')
    digester = hmac.new(message, key, hashlib.sha1)
    signature1 = digester.digest()
    signature2 = base64.urlsafe_b64encode(signature1)

    return str(signature2, 'UTF-8')

if __name__ == "__main__":
    string_to_sign = 'GET,application/json; charset=utf-8,Mon, 06 Aug 2019 10:47:00 GMT,/v1/rate/samonthlyimpact/7944196037'
    print('Authorization: Gridx P8Ay16lfm0MGN7NcXMU6mupex6M28wAM:' + base64.urlsafe_b64encode(hmac.new(bytes('P8Ay16lfm0MGN7NcXMU6mupex6M28wAM', 'UTF-8'), bytes(string_to_sign, 'UTF-8'), hashlib.sha1).digest()).decode('UTF-8'))