[FEATURE] : [DEUTSCHEBANK] 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/deutschebank.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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[Jatan196]

Hello @bsayak03 sir, I had like to work on above issue, pl assign me!

[bsayak03]

Hello @bsayak03 sir, I had like to work on above issue, pl assign me!

Have already assigned this Issue to you. Can you please raise the PR for that and then start working on this?

[Jatan196]

Sure @bsayak03 sir, will be finalising previous then pick up this one asap!

[PhantomInTheWire]

hello @bsayak03 can you please assign this issue to me? thanks.

[bsayak03]

hello @bsayak03 can you please assign this issue to me? thanks.

Assigned it to you @PhantomInTheWire