ios - Integrate Paytm with swift 3.0 -


i want integrate paytm payment gateway swift 3.0.i follow github link . have probelm in ["checksumhash"]= "" . can put in key.

orderdict["mid"] = strmid                             orderdict["order_id"] = strorderid                             orderdict["cust_id"] = strcustomerid                             orderdict["industry_type_id"] = strindustrytype                             orderdict["channel_id"] = strchanalid                             orderdict["txn_amount"] = stramt                             orderdict["website"] = strwebsite                             orderdict["callback_url"] = "http://xxxxx.co.in/verifychecksum.php"                     orderdict["checksumhash"] = ""

this gives me invalid checksum please tell me how can generate checksum.

first of can call server api generate checksum. if using almofire call 

var parameters:[string:string]?         parameters = ["mid":strmid,"order_id":strorderid ,"industry_type_id":strindustrytype,"channel_id":strchanalid,"txn_amount":stramt,"website":strwebsite, "cust_id":strcustomerid,"callback_url":"http://xxxxxxx.co.in/verifychecksum.php"]                     showhud(self.view)         print(parameters)          alamofire.request("http://xxxxxx.co.in/generatechecksum.php", method: .post, parameters: parameters,encoding: urlencoding.default, headers: nil).responsejson {}

please pass all parameter in api . gives below response 

{   "checksumhash": "xxxxxxxxxxxxx",   "order_id": "xxxxxxxx",   "payt_status": "1" }

in dictionary checksumhash pass paytm order.


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