fix(connector): [CASHTOCODE] Fix Error Response Handling

[deepanshu-iiitu]

Type of Change

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

Description

This PR will fix the error response handling in connector cashtocode.
The error response can now handle 2 datatypes(string,int) for the value error in the Cashtocode Error Response.

Additional Changes

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

Motivation and Context

https://github.com/juspay/hyperswitch-cloud/issues/3265

How did you test it?

Testing can be done by creating a payment for connector Cashtocode

curl --location 'http://localhost:8080/payments' \
--header 'Content-Type: application/json' \
--header 'Accept: application/json' \
--header 'api-key:API_KEY' \
--data-raw '{
    "amount": 1000,
    "currency": "EUR",
    "confirm": true,
    "customer_id": "e064f3fe-a027-458a-a373-09eb38122b67",
    "capture_method": "manual",
    "capture_on": "2022-09-10T10:11:12Z",
    "amount_to_capture": 1000,
    "email": "[email protected]",
    "name": "John Doe",
    "phone": "999999999",
    "phone_country_code": "+65",
    "description": "Its my first payment request",
    "authentication_type": "no_three_ds",
    "return_url": "https://google.com",
    "payment_method": "reward",
    "payment_method_type": "classic",
    "payment_method_data": "reward",
    "billing": {
        "address": {
            "city": "北九州市",
            "country": "JP",
            "line1": "福岡県",
            "line2": null,
            "line3": null,
            "zip": "８０００２０１",
            "state": null,
            "first_name": "SHIHO",
            "last_name": "YAMAGUCHI"
        },
        "phone": {
            "number": "8056594427",
            "country_code": "+91"
        }
    },
    "shipping": {
        "address": {
            "city": "北九州市",
            "country": "JP",
            "line1": "福岡県",
            "line2": null,
            "line3": null,
            "zip": "８０００２０１",
            "state": null,
            "first_name": "SHIHO",
            "last_name": "YAMAGUCHI"
        },
        "phone": {
            "number": "8056594427",
            "country_code": "+91"
        }
    },
    "statement_descriptor_name": "joseph",
    "statement_descriptor_suffix": "JS",
    "metadata": {
        "udf1": "value1",
        "new_customer": "true",
        "login_date": "2019-09-10T10:11:12Z"
    }
}'

Use the above curl to create error response

Checklist

• I formatted the code cargo +nightly fmt --all
• I addressed lints thrown by cargo clippy
• I reviewed the submitted code
• I added unit tests for my changes where possible
• I added a CHANGELOG entry if applicable