[FEATURE] : [THUNES] Add Integrity Check Support for Authorize, PSync, Refund and RSync Flows

[bsayak03]

Feature Description/Summary

Integrity check is a scenario where there is a discrepancy between the amount sent in the request and the amount received from the connector, which is checked during response handling.

Context

Integrity checks in a payments flow are critical for ensuring data consistency, correctness, and security when dealing with amounts between Hyperswitch and connectors like Adyen, Stripe, Razorpay, etc.

Starter Tasks

• In the handle_response function of Authorize/PSync/Refund/RSync, you will have to call the respective functions - get_authorise_integrity_object for Authorize, get_sync_integrity_object for Payments Sync, get_refund_integrity_object for Refund and RSync and get_capture_integrity_object for Capture.
• You would have to call these functions from crates/hyperswitch_connectors/src/utils.rs.
• These functions expect amount_convertor, amount and currency.
• You can take a look at this PR for reference.

Implementation Hints

• You can go to crates/hyperswitch_connectors/src/connectors/thunes.rs and call the respective integrity check function as stated above in the handle_response function

Acceptance Criteria

• [ ] Request and Response body added for each of the flows where integrity check is applied.
• [ ] All the required GitHub checks passing
• [ ] Formatted the code using cargo +nightly fmt --all

How to Test it

• Hardcode the amount or currency field that is being passed to the connector different from the one you are passing in the request body
• This way you would be able to reproduce the integrity checks error message while testing.

Mentor Contact

• Tag @bsayak03 [Sayak Bhattacharya] in the comments if you have any doubts/queries

Resources

Here are a few sample PRs :

• https://github.com/juspay/hyperswitch/pull/8075
• https://github.com/juspay/hyperswitch/pull/8049

Pre-Flight

Have you spent some time checking if this feature request has been raised before?

• [x] I checked and didn't find a similar issue

Have you read the Contributing Guidelines?

• [x] I have read the Contributing Guidelines

Submission Process:

• Ask the maintainers for assignment of the issue, you can request for assignment by commenting on the issue itself.
• Once assigned, submit a pull request (PR).
• Maintainers will review and provide feedback, if any.
• Maintainers can unassign issues due to inactivity, read more here.

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[musharafmaqbool]

hey i would like to take this on, could i be assigned to it?

[bsayak03]

hey i would like to take this on, could i be assigned to it?

Assigned it to @musharafmaqbool . Make sure to raise the PR on or after 1st Oct'25.

[harikrishna-au]

@bsayak03 assign this to me

[bsayak03]

@musharafmaqbool are you working on this?

[musharafmaqbool]

@bsayak03 yes i am

[musharafmaqbool]

@bsayak03 hey i have reaised the pr, now can you review it and let me know if it needs any other changes.