fix(router): Payment link api contract change

[sahkal]

Type of Change

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

Description

Changed payment link api-contract to more optimised api-contract for merchants to use.

From

"payment_link_object": {
        "link_expiry": "2025-10-09T16:23:10Z", 
        "merchant_custom_domain_name": null, 
        "custom_merchant_name": null,
        "payment_link_config": {
            "merchant_logo": "https://i.pinimg.com/736x/4d/83/5c/4d835ca8aafbbb15f84d07d926fda473.jpg",
            "color_scheme": {
                "background_primary_color": "#FED5BF",
                "sdk_theme": "#FED5BF"
            }
        }
    }

To

 "session_expiry": 1,
 "payment_link":true,
"payment_link_config": {
        "theme": null,
        "logo" : "https://i.pinimg.com/736x/4d/83/5c/4d835ca8aafbbb15f84d07d926fda473.jpg",
        "seller_name": "sahkal"
    } -- payment Create
  
  
"session_expiry": 1,
"payment_link_config": {
        "theme": null,
        "logo" : "https://i.pinimg.com/736x/4d/83/5c/4d835ca8aafbbb15f84d07d926fda473.jpg",
        "seller_name": "sahkal"
        "domain_name": "pay.amazon"
    }  -- business create
 

Additional Changes

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

Motivation and Context

How did you test it?

Test Case

curl --location 'http://localhost:8080/payments' \
--header 'Content-Type: application/json' \
--header 'Accept: application/json' \
--header 'api-key: dev_jpG5VqK8K8wsVuXJLsfG4CBrzCxRXI4rpO3lPMyk7EJXKsUDurIaZ3UrVSlH0hbI' \
--data '{
    "amount": 200,
    "currency": "USD",
    "confirm": false,
    "customer_id": "sahkal",
    "return_url": "https://google.com",
    "description": "For selling Tea",
    "order_details": [
        {
            "product_name": "Tea",
            "quantity": 1,
            "amount": 100,
            "product_img_link": null
        },
        {
            "product_name": "Tea",
            "quantity": 1,
            "amount": 100,
            "product_img_link": "https://thumbs.dreamstime.com/b/indian-tea-spices-masala-chai-33827904.jpg"
        }
    ],
    "payment_link": true,
    "session_expiry": 4325,
    "payment_link_config": {
        "theme": null,
        "logo" : "https://i.pinimg.com/736x/4d/83/5c/4d835ca8aafbbb15f84d07d926fda473.jpg",
        "seller_name": "sahkal"
    }
}'

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

[Narayanbhat166]

isn't this what zip does?
You can do something like

Suggested change

	combine_options!(payment_attempt_ref, payment_intent, business_profile)
	payment_attempt_ref.zip(payment_intent).zip(business_profile).map(|(a,b),c| (a,b,c))

[hrithikesh026]

when it comes to zipping 3 or more options, we would need to make use of nested tuples. With this macro, only single tuple is needed. looks cleaner.
With zip: if let Some(((value1, value2), value3)) = opt1.zip(opt2).zip(opt3) .
With combine_options: if let Some((value1, value2, value3)) = combine_options!(opt1, opt2, opt3)

[Narayanbhat166]

what if this is none, use unwrap_or and then pass the default value. I see that session_expiry is being already calculated below, use the same value instead of checking this.

[Narayanbhat166]

use as_ref here and then clone the inner value. You can do the same for a lot of clones below. Fight the compiler

[Narayanbhat166]

pass Some(profile_id)