Method sign

python/ccxt/backpack.py:2170–2207

(self, path, api: Any = 'public', method='GET', params={}, headers: dict = None, body: Str = None)

        return self.milliseconds() - self.options['timeDifference']

    def sign(self, path, api: Any = 'public', method='GET', params={}, headers: dict = None, body: Str = None):
        endpoint = '/' + path
        url = self.urls['api'][api]
        sortedParams = params if isinstance(params, list) else self.keysort(params)
        if api == 'private':
            self.check_required_credentials()
            ts = str(self.nonce())
            recvWindow = self.safe_string_2(self.options, 'recvWindow', 'X-Window', '5000')
            optionInstructions = self.safe_dict(self.options, 'instructions', {})
            optionPathInstructions = self.safe_dict(optionInstructions, path, {})
            instruction = self.safe_string(optionPathInstructions, method, '')
            payload = ''
            if (path == 'api/v1/orders') and (method == 'POST'):  # for createOrders
                payload = self.generate_batch_payload(sortedParams, ts, recvWindow, instruction)
            else:
                queryString = self.urlencode(sortedParams)
                if len(queryString) > 0:
                    queryString += '&'
                payload = 'instruction=' + instruction + '&' + queryString + 'timestamp=' + ts + '&window=' + recvWindow
            secretBytes = self.base64_to_binary(self.secret)
            seed = self.array_slice(secretBytes, 0, 32)
            signature = self.eddsa(self.encode(payload), seed, 'ed25519')
            headers = {
                'X-Timestamp': ts,
                'X-Window': recvWindow,
                'X-API-Key': self.apiKey,
                'X-Signature': signature,
                'X-Broker-Id': '1400',
            }
            if method != 'GET':
                body = self.json(sortedParams)
                headers['Content-Type'] = 'application/json'
        if method == 'GET':
            query = self.urlencode(sortedParams)
            if len(query) != 0:
                endpoint += '?' + query
        url += endpoint
        return {'url': url, 'method': method, 'body': body, 'headers': headers}

    def generate_batch_payload(self, params, ts, recvWindow, instruction):
        payload = ''