feat(connector/BILLWERK): add integrity check support for Authorize, PSync, Refund and RSync flows

[akileshas]

Type of Change

• [ ] Bugfix
• [x] New feature
• [ ] Enhancement
• [ ] Refactoring
• [ ] Dependency updates
• [ ] Documentation
• [ ] CI/CD

Description

For the BILLWERK connector, i have implemented the integrity checks for Authorize, PSync, RSync, Capture, and Refund flows by using the respective integrity object 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 ) from the utils.

TL;DR Changelog:

• Added amount and currency fields to both the BillwerkPaymentsResponse and RefundResponse structs.
• Made the amount and currency field public in BillwerkPaymentsRequest, BillwerkPaymentsResponse and RefundResponse structs.

Additional Changes

• [ ] This PR modifies the API contract
• [ ] This PR modifies the database schema
• [ ] This PR modifies application configuration/environment variables

Motivation and Context

Verifies the integrity between different flows. Resolves: #9150 Mentor: @bsayak03

How did you test it?

Checklist

• [x] I formatted the code cargo +nightly fmt --all
• [x] I addressed lints thrown by cargo clippy
• [x] I reviewed the submitted code
• [x] I added unit tests for my changes where possible

[semanticdiff-com[bot]]

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Changed Files

File	Status
crates/hyperswitch_connectors/src/connectors/billwerk.rs	28% smaller
crates/hyperswitch_connectors/src/connectors/billwerk/transformers.rs	5% smaller