Method sign

python/ccxt/xt.py:4862–4926

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

        return None

    def sign(self, path, api: Any = [], method='GET', params={}, headers: dict = None, body: Str = None):
        signed = api[0] == 'private'
        endpoint = api[1]
        request = '/' + self.implode_params(path, params)
        payload = None
        if (endpoint == 'spot') or (endpoint == 'user'):
            if signed:
                payload = '/' + self.version + request
            else:
                payload = '/' + self.version + '/public' + request
        else:
            payload = request
        url = self.urls['api'][endpoint] + payload
        query = self.omit(params, self.extract_params(path))
        urlencoded = self.urlencode(self.keysort(query))
        headers = {
            'Content-Type': 'application/json',
        }
        if signed:
            self.check_required_credentials()
            defaultRecvWindow = self.safe_string(self.options, 'recvWindow')
            recvWindow = self.safe_string(query, 'recvWindow', defaultRecvWindow)
            timestamp = self.number_to_string(self.nonce())
            body = query
            if (payload == '/v4/order') or (payload == '/future/trade/v1/order/create') or (payload == '/future/trade/v1/entrust/create-plan') or (payload == '/future/trade/v1/entrust/create-profit') or (payload == '/future/trade/v1/order/create-batch'):
                id = 'CCXT'
                if payload.find('future') > -1:
                    body['clientMedia'] = id
                else:
                    body['media'] = id
            isUndefinedBody = ((method == 'GET') or (path == 'order/{orderId}') or (path == 'ws-token'))
            if (method == 'PUT') and (endpoint == 'spot'):
                isUndefinedBody = False
            body = None if isUndefinedBody else self.json(body)
            payloadString = None
            if (endpoint == 'spot') or (endpoint == 'user'):
                payloadString = 'xt-validate-algorithms=HmacSHA256&xt-validate-appkey=' + self.apiKey + '&xt-validate-recvwindow=' + recvWindow + '&xt-validate-t' + 'imestamp=' + timestamp
                if isUndefinedBody:
                    if urlencoded:
                        url += '?' + urlencoded
                        payloadString += '#' + method + '#' + payload + '#' + self.rawencode(self.keysort(query))
                    else:
                        payloadString += '#' + method + '#' + payload
                else:
                    payloadString += '#' + method + '#' + payload + '#' + body
                headers['xt-validate-algorithms'] = 'HmacSHA256'
                headers['xt-validate-recvwindow'] = recvWindow
            else:
                payloadString = 'xt-validate-appkey=' + self.apiKey + '&xt-validate-t' + 'imestamp=' + timestamp  # we can't glue timestamp, breaks in php
                if method == 'GET':
                    if urlencoded:
                        url += '?' + urlencoded
                        payloadString += '#' + payload + '#' + urlencoded
                    else:
                        payloadString += '#' + payload
                else:
                    payloadString += '#' + payload + '#' + body
            signature = self.hmac(self.encode(payloadString), self.encode(self.secret), hashlib.sha256)