kraken.py 文件源码

def sign(self, url, endpoint, endpoint_path, method_verb, *args, **kwargs):
        try:
            req = kwargs['params']
        except KeyError:
            req = {}

        req['nonce'] = self.nonce()
        postdata = urllib.parse.urlencode(req)

        # Unicode-objects must be encoded before hashing
        encoded = (str(req['nonce']) + postdata).encode('utf-8')
        message = (endpoint_path.encode('utf-8') +
                   hashlib.sha256(encoded).digest())

        signature = hmac.new(base64.b64decode(self.secret),
                             message, hashlib.sha512)
        sigdigest = base64.b64encode(signature.digest())

        headers = {
            'API-Key': self.key,
            'API-Sign': sigdigest.decode('utf-8')
        }

        return url, {'data': req, 'headers': headers}