Paytm - Checksum provided is invalid

Question

While creating the transaction token for paytm business, I am receiving the below error as response from paytm.

CURL request ( as per docs, 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="}}'

Response

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

I have generated the checksum in ruby using https://github.com/paytm/Paytm_Ruby_Checksum/blob/master/PaytmChecksum.rb

Answers and small suggestions also are most welcome !!!

Hi @Bharathiraja, Did you get any workaround on this? I'm also facing the same issue. can you please help me? — Thiruvettai Athithiyan S, Sep 17 '20 at 05:57
I am facing same issue with production api keys and paytm support isn't replying? — Vishvendra Singh, Sep 19 '20 at 11:27

score 1 · Answer 1 · edited Jun 30 '22 at 02:09

It seems you are creating checksum with wrong parameters, please find the below steps for more clarification.

body request should be

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

paytmChecksum = PaytmChecksum.new.generateSignature(body, “YOUR_Key_HERE”)

Your final curl request should be

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”,“currency”:“INR”},“userInfo”:{“custId”:“CUST_001"},“callbackUrl”:“https://merchant.com/callback”},“head”:{“signature”:“‘+paytmChecksum+‘“}}’

score 0 · Answer 2 · answered Feb 09 '22 at 12:16

0

When I removed website name and callback URL its working fine.

Just replace the MID with your and its working fine

answered Feb 09 '22 at 12:16

shubomb

672
7
20

score 0 · Answer 3 · answered Nov 10 '22 at 09:29

Include all the mandatory fields, as described in: https://business.paytm.com/docs/api/initiate-transaction-api/?ref=payments

An example in java would be:

    // Below section generates body of the POST request

    JSONObject body = new JSONObject();
    body.put("requestType", "Payment");
    body.put("mid", MERCHANT_ID);
    //"DEFAULT" for production and "WEBSTAGING" for staging
    body.put("websiteName", "DEFAULT");
    body.put("orderId", orderId);
    body.put("callbackUrl", "");
    
    JSONObject txnAmount = new JSONObject();
    txnAmount.put("value", amount);
    txnAmount.put("currency", "INR");

    JSONObject userInfo = new JSONObject();
    userInfo.put("custId", CUSTOMER_ID);
    userInfo.put("mobile", customerMobile);

    body.put("txnAmount", txnAmount);
    body.put("userInfo", userInfo);

    String checksum = PaytmChecksum.generateSignature(body.toString(), MERCHANT_KEY);
    JSONObject head = new JSONObject();
    head.put("signature", checksum);

    JSONObject paytmParams = new JSONObject();
    paytmParams.put("body", body);
    paytmParams.put("head", head);

    URL url = new URL(PAYTM_URL + "mid="+MERCHANT_ID+"&orderId="+orderId);

Also, set the header "Content-Type" to "application/json" when sending the POST request.

score -1 · Answer 4 · answered Feb 16 '21 at 15:32

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","currency":"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

end

While your answer may solve the question, [including an explanation](https://meta.stackexchange.com/q/114762) of how and why this solves the problem would really help to improve the quality of your post, and probably result in more up-votes. Remember that you are answering the question for readers in the future, not just the person asking now. You can edit your answer to add explanations and give an indication of what limitations and assumptions apply. - [From Review](https://stackoverflow.com/review/late-answers/28337419) — Adam Marshall, Feb 16 '21 at 16:37

Paytm - Checksum provided is invalid

4 Answers4