Describe the bug
Function definition of verifychecksum(params, key) has changed, so when the endpoint redirects to paytm, it throws the error about checksumhash. See screenshot below.

To Reproduce
Steps to reproduce the behavior:

1. Clone the project
2. run npm install
3. create and fill the .env file
4. run npm start
5. open http://localhost:4000/paywithpaytm?amount=10
6. See error for checksum

Expected behavior
It has to go to payment successfully.

Screenshots

Desktop (please complete the following information):

• OS: OS X Catalina
• Browser Chrome 78

http://localhost:4000/paywithpaytm?amount=10
gives error of {Cannot POST /paywithpaytm} and
when I replaced app.get() to app.all() or app.post() , http://localhost:4000/paywithpaytm?amount=10 does not give error but it seems like moving on a loop ,every 2 second it gets refreshed automatically causing no opening of paytm page..i checked every modules is installed ..and no error in my MID AND KEYS at all.

hello, i am facing a problem that after successful sending request to paytm gateway. It did not generate receipt can you please help me in this

I'm trying to use this repository in one of my production projects and I'm unable to use a different IV. All I'm doing is using a 16 character long IV but somehow, it keeps failing the checksum verification with a different IV.

I know I could be doing something stupid on my end which is making things go wrong, but can you try using a different iv and see if everything is working still as expected ? If not, is there a way to improve ?

Thanks

Open below url in browser! http://localhost:4000/paywithpaytm?amount=10

1. I cloned the git repo.
2. Did npm install. Put my merchant ID and secret key from Paytm.
3. Run npm run start.
4. While opening the browser, it showing can't GET /

Can you explain me what I am doing wrong?

This is the one of the cleanest node/express code I have seen. Great stuff. Thanks.