feat(connector_onboarding): Add Connector onboarding APIs

[ThisIsMani]

Type of Change

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

Description

This PR adds 2 new APIs which will allow merchants to onboarding to paypal directly from the Hyperswitch.

Additional Changes

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

1. config
2. loadtest/config

Motivation and Context

To support PayPal onboarding.

How did you test it?

Postman.

1. Create a new user and login

curl --location 'https://integ-api.hyperswitch.io/user/v2/signin' \
--header 'Content-Type: application/json' \
--data-raw '{
    "email": "[email protected]",
    "password": "somepassword"
}'

You will get the following response

{
    "token": "JWTToken",
    "merchant_id": "merchant_id",
    "name": "name",
    "email": "[email protected]",
    "verification_days_left": null,
    "is_metadata_filled": true,
    "user_role": "merchant_admin"
}

3. Use the merchant_id you received to create a paypal connector with the following body in the curl mentioned

curl --location 'https://integ-api.hyperswitch.io/account/merchant_id/connectors' \
--header 'Content-Type: application/json' \
--header 'Accept: application/json' \
--header 'api-key: ADMIN API KEY' \
--data '{
  "connector_type": "fiz_operations",
  "connector_name": "paypal",
  "connector_account_details": {
    "auth_type": "TemporaryAuth"
  },
}'

4. Using the mca_id call the following api

curl --location 'https://integ-api.hyperswitch.io/connector_onboarding/action_url' \
--header 'Content-Type: application/json' \
--header 'Authorization: Bearer JWTToken' \
--data '{
    "connector": "paypal",
    "connector_id": "mca_id",
    "return_url": "https://www.google.com"
}'

You will get the following response

{
    "paypal": {
        "action_url": "https://www.sandbox.paypal.com/bizsignup/partner/entry?referralToken=sometoken"
    }
}

5. Login/Create a account from the above link and call the following api with mca_id and profile_id

curl --location 'https://integ-api.hyperswitch.io/connector_onboarding/sync' \
--header 'Content-Type: application/json' \
--header 'Authorization: Bearer JWTToken' \
--data '{
    "connector": "paypal",
    "connector_id": "mca_id",
    "profile_id": "profile_id"
}'

You will get a mca response if signup has happened properly.

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

[SanchithHegde]

This being hard-coded is intentional?

[ThisIsMani]

Yes, for now I have changed the url to hyperswitch.io