Paytm - 提供的校验和无效答案

【问题标题】：Paytm - Checksum provided is invalidPaytm - 提供的校验和无效
【发布时间】：2020-11-26 17:32:00
【问题描述】：

在为 paytm 业务创建交易令牌时，我收到以下错误作为 paytm 的响应。

CURL 请求（根据文档，https://developer.paytm.com/docs/initiate-transaction-api/?ref=payments）

curl -X POST 'https://securegw-stage.paytm.in/theia/api/v1/initiateTransaction?mid=hkmbcA45014017456710&orderId=ORDERID_2' \
--header 'Content-Type: application/json' \
--data '{"body":{"requestType":"Payment","mid":"hkmbcA45014017456710","websiteName":"WEBSTAGING","orderId":"ORDERID_2","txnAmount":{"value":"1.00","currency":"INR"},"userInfo":{"custId":"CUST_001"},"callbackUrl":"https://merchant.com/callback"},"head":{"signature":"E3g+4XifD5/XwcD/tJ9ePYJTlJGZL7BneqY4Vf32faqEJ8zkSvgM+pMWfCAfmb0VwQaT3M4p6e+grMXjeqsRScF7en86MjLY1ieA9WRf4w="}}'

回应

{"head":{"requestId":null,"responseTimestamp":"1596714537669","version":"v1"},"body":{"extraParamsMap":null,"resultInfo":{"resultStatus":"F","resultCode":"2005","resultMsg":"Checksum provided is invalid"}}}

我在 ruby 中使用 https://github.com/paytm/Paytm_Ruby_Checksum/blob/master/PaytmChecksum.rb

生成了校验和

也欢迎回答和小建议！！！

【问题讨论】：

嗨@Bharathiraja，你有什么解决方法吗？我也面临同样的问题。你能帮帮我吗？
我在生产 api 密钥方面面临同样的问题，paytm 支持没有回复？

标签： payment-gateway paytm

【解决方案1】：

require './lib/modules/PaytmChecksum.rb'

def paytm_txn_gen
body = '{"requestType":"Payment","mid":"YOUR_MID_HERE","websiteName":"WEBSTAGING","orderId":"ORDERID_98765","txnAmount":{"value":"1.00","货币":"INR"},"userInfo":{"custId":"CUST_001"},"callbackUrl":"https://merchant.com/callback"}'

paytmChecksum = PaytmChecksum.new.generateSignature(body, "YOUR_MERCHANT_KEY")
verifyChecksum = PaytmChecksum.new.verifySignature(body, "YOUR_MERCHANT_KEY", paytmChecksum)

puts "generateSignature Returns: %s\n" %[paytmChecksum]
puts "verifySignature Returns: %s\n" %[verifyChecksum]

data = '{"body":{"requestType":"Payment","mid":"YOUR_MID_HERE","websiteName":"WEBSTAGING","orderId":"ORDERID_98765","txnAmount":{"value":"1.00","currency":"INR"},"userInfo":{"custId":"CUST_001"},"callbackUrl":"https://merchant.com/callback"},"head":{"signature":"'+paytmChecksum+'"}}'

puts data

_url = "https://securegw-stage.paytm.in/theia/api/v1/initiateTransaction?mid=YOUR_MID_HERE&orderId=ORDERID_98765";

response = RestClient::Request.new({
method: :post,
url: "#{_url}",
payload: data,
headers: {content_type: "application/json"}
 }).execute do |response, request, result|
  puts "***********************"
  puts JSON.parse(response).inspect
end

结束

【讨论】：

虽然您的回答可能会解决问题，但 including an explanation 关于如何以及为什么解决问题将真正有助于提高您的帖子质量，并可能导致更多的赞成票。请记住，您正在为将来的读者回答问题，而不仅仅是现在提问的人。您可以编辑您的答案以添加解释并指出适用的限制和假设。 - From Review

【解决方案2】：

您似乎正在使用错误的参数创建校验和，请查找以下步骤以获得更多说明。

正文请求应该是

body='{“requestType”:“Payment”,“mid”:“YOUR_MID_HERE”,“websiteName”:“WEBSTAGING”,“orderId”:“ORDERID_98765111”,“txnAmount”:{“value”:“1.00 ”,“货币”:“INR”},“userInfo”:{“custId”:“CUST_001”},“callbackUrl”:“https://merchant.com/callback”}'

paytmChecksum = PaytmChecksum.new.generateSignature(body, “YOUR_Key_HERE”)
您的最终 curl 请求应该是 curl -X POST ‘https://securegw-stage.paytm.in/theia/api/v1/initiateTransaction?mid=hkmbcA45014017456710&orderId=ORDERID_2’
--header ‘Content-Type: application/json’
--data '{“body”:{“requestType”:“Payment”,“mid”:“INTEGR77698636129383”,“websiteName”:“WEBSTAGING”,“orderId”:“ORDERID_98765111”,“txnAmount”:{“value” :“1.00”,“货币”:“INR”},“userInfo”:{“custId”:“CUST_001”},“callbackUrl”:“https://merchant.com/callback”},“head”:{ “签名”：“'+paytmChecksum+'“}}'

【讨论】：