Visa Payment Processing - Authorizations v3 API - Token Validation Failed

[marcusdbb]

I'm having trouble with token validation with the Authorizations v3 API  in python. I have ran the helloworld GET API successfully, so I'm confident that my credentials are not the problem. I believe the problem is with how I pass in the PAYLOAD body. I've never ran a successful post request yet and I can't find any examples. Can anyone tell me how to pass the PAYLOAD body into the x_pay_token generator?

I copy & paste the PAYLOAD body as:

body = {PAYLOAD data, with my ClientID from my test data in place}

and then I pass the body into the x_pay_token generator. I use json.dumps to pass it in as a string otherwise it won't go through the _get_x_pay_token() function.

x_pay_token = _get_x_pay_token(shared_secret, resource_path, query_string, json.dumps(body))

When I run this code, the following error occurs: 

{"responseStatus":{"status":401,"code":"9159","severity":"ERROR","message":"Token Validation Failed","info":""}

here's the headers, url, and request for extra debugging:

headers = {'X-PAY-TOKEN': x_pay_token, 'Accept': 'application/json', 'Content-Type': 'application/json'}
url = 'https://sandbox.api.visa.com/acs/v3/payments/authorizations?apiKey='{{myApi}}'
r = requests.post(url, headers=headers)

[marcusdbb]

This is all my python code:

def _get_x_pay_token(shared_secret, resource_path, query_string, body):  
		timestamp = str(timegm(datetime.utcnow().timetuple()))  
		pre_hash_string = timestamp + resource_path + query_string + body 
		hash_string = hmac.new(shared_secret, 
			                    msg=pre_hash_string.encode('utf-8'),
								digestmod=sha256).hexdigest()
		return 'xv2:' + timestamp + ':' + hash_string

	shared_secret = b'{{mySharedSecret}}'
	resource_path = 'authorizations'
	query_string = 'apiKey={{myaApi}}'
	body = {
	  "msgIdentfctn": {
	    "clientId": "{{myclienId}}",
	    "correlatnId": "Gg6yTAyWkmhyq0jPKHziafe"
	  },
	  "Body": {
	    "Tx": {
	      "TxAttr": [
	        "INST"
	      ],
	      "TxDesc": "transactiondescription",
	      "TxId": {
	        "LclDtTm": "2016-11-25T01:02:03"
	      },
	      "AddtlData": {
	        "Val": "freeformdata",
	        "Tp": "FreeFormDescData"
	      },
	      "TxAmts": {
	        "AmtQlfr": "ESTM",
	        "TxAmt": {
	          "Ccy": "008",
	          "Amt": "123.45"
	        }
	      }
	    },
	    "Envt": {
	      "Accptr": {
	        "PaymentFacltId": "52014057",
	        "CstmrSvc": "1 4155552235",
	        "ShrtNm": "ABC Supplies",
	        "Id": "999999999999999",
	        "FrgnRtlrInd": True,
	        "Adr": {
	          "PstlCd": "78463",
	          "CtrySubDvsnMjr": "03",
	          "Ctry": "US",
	          "CtrySubDvsnMnr": "011"
	        }
	      },
	      "Termnl": {
	        "TermnlId": {
	          "Id": "99999999"
	        }
	      },
	      "Wllt": {
	        "Prvdr": {
	          "Id": "VCIND"
	        }
	      },
	      "Card": {
	        "XpryDt": "2312",
	        "PAN": "4000220177656623"
	      }
	    },
	    "Cntxt": {
	      "Vrfctn": [
	        {
	          "VrfctnInf": {
	            "Val": {
	              "HexBinryVal": "099010618111100000000788400707000000000"
	            },
	            "Tp": "authenticationValue"
	          },
	          "Tp": "THDS"
	        },
	        {
	          "VrfctnInf": {
	            "Val": {
	              "TxtVal": "321"
	            }
	          },
	          "Tp": "CSCV"
	        },
	        {
	          "VrfctnInf": {
	            "Val": {
	              "TxtVal": "PO Box 12345"
	            }
	          },
	          "Tp": "ADDB"
	        },
	        {
	          "VrfctnInf": {
	            "Val": {
	              "TxtVal": "12345"
	            }
	          },
	          "Tp": "PCDV"
	        }
	      ],
	      "TxCntxt": {
	        "MrchntCtgyCd": "3501",
	        "MrchntCtgySpcfcData": "B",
	        "AuthntcnOutgInd": True
	      },
	      "PtOfSvcCntxt": {
	        "CardDataNtryMd": "CDFL"
	      },
	      "SaleCntxt": {
	        "GoodsAndSvcsTp": "ELEC",
	        "GoodsAndSvcsSubTp": "CRCU"
	      }
	    },
	    "SplmtryData": [
	      {
	        "Envlp": {
	          "StrngCstmrAuthntcn": {
	            "Xmptn": [
	              {
	                "Val": "CLAI",
	                "Tp": "TMBE"
	              },
	              {
	                "Val": "NCLA",
	                "Tp": "LOWA"
	              }
	            ],
	            "DlgtdAuthrty": "CLAI"
	          }
	        },
	        "PlcAndNm": "EUPSD2SCADataSD1V01"
	      }
	    ],
	    "AdddmData": {
	      "AddtlData": {
	        "Val": "1234567890",
	        "Tp": "PlanRegSysId"
	      },
	      "Instlmt": {
	        "PmtSeqNb": "12",
	        "Plan": [
	          {
	            "DfrrdInstlmtInd": True,
	            "PrdUnit": "WEEK",
	            "SbsqntAmt": "9999.99",
	            "TtlNbOfPmts": 24,
	            "InstlmtCcy": 840,
	            "NbOfPrds": "2",
	            "PlanOwnr": "ISSR",
	            "GrdTtlAmt": "234.56"
	          }
	        ]
	      }
	    }
	  }
	}
	print(json.dumps(body))

	x_pay_token = _get_x_pay_token(shared_secret, resource_path, query_string, json.dumps(body))

	headers = {'X-PAY-TOKEN': x_pay_token, 'Accept': 'application/json', 'Content-Type': 'application/json'}
	url = 'https://sandbox.api.visa.com/acs/v3/payments/authorizations?apiKey={{myaApi}}'
	r = requests.post(url, headers=headers, json=json.dumps(body))

	print(r.content)

	template = loader.get_template('checkout/sdk.html')

	context = {
		'code': r.content,
	}
	return HttpResponse(template.render(context, request))

[jenn_kh]

Hi, @marcusdbb! Thank you for reaching out. An agent is looking for a solution for you and will get back to you as soon as possible. Until then, if any community members know a solution, please share it here. -Jenn