feat(core): Added integrity framework for Authorize and Sync flow with connector as Stripe

Type of Change

[x] New feature

Description

With this PR, we are implementing connector integrity checks for the authorize and sync flow. After receiving a response from the connector, we will validate on our end whether the data sent to the connector matches the data received from their end.

If the validation fails we will mark the transaction as processing so that if the connector fixes the response in sync, the status will move to respective terminal state.

At api level the response will be 5xx with connector_transaction_id in response for merchant to reference in case if integrity failures for both sync and authorize.

How did you test it?

Since its a blackbox scenario, we cannot test until and unless there is a error data from connectors end!

Local testing scenario

Scenario[1] Where Connector send wrong currency in both authorize and sync flow

Payments Create

curl --location 'http://localhost:8080/payments' \
--header 'Content-Type: application/json' \
--header 'Accept: application/json' \
--header 'api-key: dev_ng5enE9FcquL9C0eYO1Jr0E6U8V8vbriDijpN4EgVpr1o31zWAMrVzkIt3q5ZvRh' \
--data-raw '
{
    "amount": 250,
    "currency": "USD",
    "confirm": true,
    "amount_to_capture": 250,
    "capture_method": "automatic",
    "capture_on": "2022-09-10T10:11:12Z",
    "customer_id": "StripeCustomer123",
    "email": "abcdef123@gmail.com",
    "name": "John Doe",
    "phone": "999999999",
    "phone_country_code": "+65",
    "description": "Please Pay for your XYZ",
    "authentication_type": "no_three_ds",
    "return_url": "https://google.com",
    "setup_future_usage": "off_session",
    "browser_info": {
        "user_agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.110 Safari/537.36",
        "accept_header": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8",
        "language": "nl-NL",
        "color_depth": 24,
        "screen_height": 723,
        "screen_width": 1536,
        "time_zone": 0,
        "java_enabled": true,
        "java_script_enabled": true,
        "ip_address": "127.0.0.1"
    },
    "routing": {
        "type": "single",
        "data": "nmi"
    },
    "statement_descriptor_name": "joseph",
    "statement_descriptor_suffix": "JS",
    "metadata": {
        "udf1": "value1",
        "new_customer": "true",
        "login_date": "2019-09-10T10:11:12Z"
    },
    "payment_method": "card",
    "payment_method_type": "credit",
    "payment_method_data": {
        "card": {
            "card_number": "4242424242424242",
            "card_exp_month": "08",
            "card_exp_year": "25",
            "card_holder_name": "joseph Doe",
            "card_cvc": "999"
        }
    }
}
'

Payments Sync

with force_sync as False

curl --location 'http://localhost:8080/payments/pay_x99f0Q4DO2drPrt3QZX0' \
--header 'Accept: application/json' \
--header 'api-key: dev_ng5enE9FcquL9C0eYO1Jr0E6U8V8vbriDijpN4EgVpr1o31zWAMrVzkIt3q5ZvRh'

response

{
    "payment_id": "pay_x99f0Q4DO2drPrt3QZX0",
    "merchant_id": "merchant_1718267057",
    "status": "processing",
    "amount": 250,
    "net_amount": 250,
    "amount_capturable": 250,
    "amount_received": 250,
    "connector": "stripe",
    "client_secret": "pay_x99f0Q4DO2drPrt3QZX0_secret_0A6rPzdRv1pvBLdZ61GA",
    "created": "2024-06-24T11:03:39.655Z",
    "currency": "USD",
    "customer_id": "StripeCustomer123",
    "customer": {
        "id": "StripeCustomer123",
        "name": "John Doe",
        "email": "abcdef123@gmail.com",
        "phone": "999999999",
        "phone_country_code": "+65"
    },
    "description": "Please Pay for your XYZ",
    "refunds": null,
    "disputes": null,
    "mandate_id": null,
    "mandate_data": null,
    "setup_future_usage": "off_session",
    "off_session": null,
    "capture_on": null,
    "capture_method": "automatic",
    "payment_method": "card",
    "payment_method_data": {
        "card": {
            "last4": "4242",
            "card_type": null,
            "card_network": null,
            "card_issuer": null,
            "card_issuing_country": null,
            "card_isin": "424242",
            "card_extended_bin": null,
            "card_exp_month": "08",
            "card_exp_year": "25",
            "card_holder_name": "joseph Doe",
            "payment_checks": null,
            "authentication_data": null
        },
        "billing": null
    },
    "payment_token": null,
    "shipping": null,
    "billing": null,
    "order_details": null,
    "email": "abcdef123@gmail.com",
    "name": "John Doe",
    "phone": "999999999",
    "return_url": "https://google.com/",
    "authentication_type": "no_three_ds",
    "statement_descriptor_name": "joseph",
    "statement_descriptor_suffix": "JS",
    "next_action": null,
    "cancellation_reason": null,
    "error_code": null,
    "error_message": "Integrity Check Failed! Value mismatched for fields currency",
    "unified_code": null,
    "unified_message": null,
    "payment_experience": null,
    "payment_method_type": "credit",
    "connector_label": null,
    "business_country": null,
    "business_label": "default",
    "business_sub_label": null,
    "allowed_payment_method_types": null,
    "ephemeral_key": null,
    "manual_retry_allowed": false,
    "connector_transaction_id": "pi_3PVAgTCuXDMKrYZe0L9s7DNy",
    "frm_message": null,
    "metadata": {
        "udf1": "value1",
        "login_date": "2019-09-10T10:11:12Z",
        "new_customer": "true"
    },
    "connector_metadata": null,
    "feature_metadata": null,
    "reference_id": null,
    "payment_link": null,
    "profile_id": "pro_rhbVuxclv1iy3M2pZkkI",
    "surcharge_details": null,
    "attempt_count": 1,
    "merchant_decision": null,
    "merchant_connector_id": "mca_sKlZxW37AYQNFv4Z4LGy",
    "incremental_authorization_allowed": null,
    "authorization_count": null,
    "incremental_authorizations": null,
    "external_authentication_details": null,
    "external_3ds_authentication_attempted": false,
    "expires_on": "2024-06-24T11:18:39.655Z",
    "fingerprint": null,
    "browser_info": {
        "language": "nl-NL",
        "time_zone": 0,
        "ip_address": "127.0.0.1",
        "user_agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.110 Safari/537.36",
        "color_depth": 24,
        "java_enabled": true,
        "screen_width": 1536,
        "accept_header": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8",
        "screen_height": 723,
        "java_script_enabled": true
    },
    "payment_method_id": null,
    "payment_method_status": null,
    "updated": "2024-06-24T11:03:42.546Z",
    "charges": null,
    "frm_metadata": null
}

we should get error message as integrity check failed with status as processing.

with force_sync as true

curl --location 'http://localhost:8080/payments/pay_x99f0Q4DO2drPrt3QZX0?force_sync=true' \
--header 'Accept: application/json' \
--header 'api-key: dev_ng5enE9FcquL9C0eYO1Jr0E6U8V8vbriDijpN4EgVpr1o31zWAMrVzkIt3q5ZvRh'

Scenario[2] Where Connector send wrong currency in both authorize but fixes the same sync flow

Payments Create

curl --location 'http://localhost:8080/payments' \
--header 'Content-Type: application/json' \
--header 'Accept: application/json' \
--header 'api-key: dev_ng5enE9FcquL9C0eYO1Jr0E6U8V8vbriDijpN4EgVpr1o31zWAMrVzkIt3q5ZvRh' \
--data-raw '
{
    "amount": 250,
    "currency": "USD",
    "confirm": true,
    "amount_to_capture": 250,
    "capture_method": "automatic",
    "capture_on": "2022-09-10T10:11:12Z",
    "customer_id": "StripeCustomer123",
    "email": "abcdef123@gmail.com",
    "name": "John Doe",
    "phone": "999999999",
    "phone_country_code": "+65",
    "description": "Please Pay for your XYZ",
    "authentication_type": "no_three_ds",
    "return_url": "https://google.com",
    "setup_future_usage": "off_session",
    "browser_info": {
        "user_agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.110 Safari/537.36",
        "accept_header": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8",
        "language": "nl-NL",
        "color_depth": 24,
        "screen_height": 723,
        "screen_width": 1536,
        "time_zone": 0,
        "java_enabled": true,
        "java_script_enabled": true,
        "ip_address": "127.0.0.1"
    },
    "routing": {
        "type": "single",
        "data": "nmi"
    },
    "statement_descriptor_name": "joseph",
    "statement_descriptor_suffix": "JS",
    "metadata": {
        "udf1": "value1",
        "new_customer": "true",
        "login_date": "2019-09-10T10:11:12Z"
    },
    "payment_method": "card",
    "payment_method_type": "credit",
    "payment_method_data": {
        "card": {
            "card_number": "4242424242424242",
            "card_exp_month": "08",
            "card_exp_year": "25",
            "card_holder_name": "joseph Doe",
            "card_cvc": "999"
        }
    }  
}
'

Payments Sync

with force_sync true

curl --location 'http://localhost:8080/payments/pay_ExsGuWmhYUqDrkkAJnVg?force_sync=true' \
--header 'Accept: application/json' \
--header 'api-key: dev_ng5enE9FcquL9C0eYO1Jr0E6U8V8vbriDijpN4EgVpr1o31zWAMrVzkIt3q5ZvRh'

Response

{
    "payment_id": "pay_ExsGuWmhYUqDrkkAJnVg",
    "merchant_id": "merchant_1718267057",
    "status": "succeeded",
    "amount": 250,
    "net_amount": 250,
    "amount_capturable": 0,
    "amount_received": 250,
    "connector": "stripe",
    "client_secret": "pay_ExsGuWmhYUqDrkkAJnVg_secret_upTfAFa5sOSTcGTMKKIO",
    "created": "2024-06-24T11:11:45.150Z",
    "currency": "USD",
    "customer_id": "StripeCustomer123",
    "customer": {
        "id": "StripeCustomer123",
        "name": "John Doe",
        "email": "abcdef123@gmail.com",
        "phone": "999999999",
        "phone_country_code": "+65"
    },
    "description": "Please Pay for your XYZ",
    "refunds": null,
    "disputes": null,
    "mandate_id": null,
    "mandate_data": null,
    "setup_future_usage": "off_session",
    "off_session": null,
    "capture_on": null,
    "capture_method": "automatic",
    "payment_method": "card",
    "payment_method_data": {
        "card": {
            "last4": "4242",
            "card_type": null,
            "card_network": null,
            "card_issuer": null,
            "card_issuing_country": null,
            "card_isin": "424242",
            "card_extended_bin": null,
            "card_exp_month": "08",
            "card_exp_year": "25",
            "card_holder_name": "joseph Doe",
            "payment_checks": {
                "address_line1_check": null,
                "address_postal_code_check": null,
                "cvc_check": "pass"
            },
            "authentication_data": null
        },
        "billing": null
    },
    "payment_token": null,
    "shipping": null,
    "billing": null,
    "order_details": null,
    "email": "abcdef123@gmail.com",
    "name": "John Doe",
    "phone": "999999999",
    "return_url": "https://google.com/",
    "authentication_type": "no_three_ds",
    "statement_descriptor_name": "joseph",
    "statement_descriptor_suffix": "JS",
    "next_action": null,
    "cancellation_reason": null,
    "error_code": null,
    "error_message": null,
    "unified_code": null,
    "unified_message": null,
    "payment_experience": null,
    "payment_method_type": "credit",
    "connector_label": null,
    "business_country": null,
    "business_label": "default",
    "business_sub_label": null,
    "allowed_payment_method_types": null,
    "ephemeral_key": null,
    "manual_retry_allowed": false,
    "connector_transaction_id": "pi_3PVAoICuXDMKrYZe1GvfbMYa",
    "frm_message": null,
    "metadata": {
        "udf1": "value1",
        "login_date": "2019-09-10T10:11:12Z",
        "new_customer": "true"
    },
    "connector_metadata": null,
    "feature_metadata": null,
    "reference_id": "pi_3PVAoICuXDMKrYZe1GvfbMYa",
    "payment_link": null,
    "profile_id": "pro_rhbVuxclv1iy3M2pZkkI",
    "surcharge_details": null,
    "attempt_count": 1,
    "merchant_decision": null,
    "merchant_connector_id": "mca_sKlZxW37AYQNFv4Z4LGy",
    "incremental_authorization_allowed": null,
    "authorization_count": null,
    "incremental_authorizations": null,
    "external_authentication_details": null,
    "external_3ds_authentication_attempted": false,
    "expires_on": "2024-06-24T11:26:45.150Z",
    "fingerprint": null,
    "browser_info": {
        "language": "nl-NL",
        "time_zone": 0,
        "ip_address": "127.0.0.1",
        "user_agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.110 Safari/537.36",
        "color_depth": 24,
        "java_enabled": true,
        "screen_width": 1536,
        "accept_header": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8",
        "screen_height": 723,
        "java_script_enabled": true
    },
    "payment_method_id": null,
    "payment_method_status": null,
    "updated": "2024-06-24T11:12:40.350Z",
    "charges": null,
    "frm_metadata": null
}

Status should move to succeeded!

Scenario[3] Where connector sends correct data in both authorize and sync flow

Payments Create

curl --location 'http://localhost:8080/payments' \
--header 'Content-Type: application/json' \
--header 'Accept: application/json' \
--header 'api-key: dev_ng5enE9FcquL9C0eYO1Jr0E6U8V8vbriDijpN4EgVpr1o31zWAMrVzkIt3q5ZvRh' \
--data-raw '
{
    "amount": 250,
    "currency": "USD",
    "confirm": true,
    "amount_to_capture": 250,
    "capture_method": "automatic",
    "capture_on": "2022-09-10T10:11:12Z",
    "customer_id": "StripeCustomer123",
    "email": "abcdef123@gmail.com",
    "name": "John Doe",
    "phone": "999999999",
    "phone_country_code": "+65",
    "description": "Please Pay for your XYZ",
    "authentication_type": "no_three_ds",
    "return_url": "https://google.com",
    "setup_future_usage": "off_session",
    "browser_info": {
        "user_agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.110 Safari/537.36",
        "accept_header": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8",
        "language": "nl-NL",
        "color_depth": 24,
        "screen_height": 723,
        "screen_width": 1536,
        "time_zone": 0,
        "java_enabled": true,
        "java_script_enabled": true,
        "ip_address": "127.0.0.1"
    },
    "routing": {
        "type": "single",
        "data": "nmi"
    },
    "statement_descriptor_name": "joseph",
    "statement_descriptor_suffix": "JS",
    "metadata": {
        "udf1": "value1",
        "new_customer": "true",
        "login_date": "2019-09-10T10:11:12Z"
    },
    "payment_method": "card",
    "payment_method_type": "credit",
    "payment_method_data": {
        "card": {
            "card_number": "4242424242424242",
            "card_exp_month": "08",
            "card_exp_year": "25",
            "card_holder_name": "joseph Doe",
            "card_cvc": "999"
        }
    }
}
'

Response

{
    "payment_id": "pay_HD0mGNbh3sY4SDzEJsPv",
    "merchant_id": "merchant_1718267057",
    "status": "succeeded",
    "amount": 250,
    "net_amount": 250,
    "amount_capturable": 0,
    "amount_received": 250,
    "connector": "stripe",
    "client_secret": "pay_HD0mGNbh3sY4SDzEJsPv_secret_EpmbV93ry8SiEMGIjCDF",
    "created": "2024-06-24T11:16:26.868Z",
    "currency": "USD",
    "customer_id": "StripeCustomer123",
    "customer": {
        "id": "StripeCustomer123",
        "name": "John Doe",
        "email": "abcdef123@gmail.com",
        "phone": "999999999",
        "phone_country_code": "+65"
    },
    "description": "Please Pay for your XYZ",
    "refunds": null,
    "disputes": null,
    "mandate_id": null,
    "mandate_data": null,
    "setup_future_usage": "off_session",
    "off_session": null,
    "capture_on": null,
    "capture_method": "automatic",
    "payment_method": "card",
    "payment_method_data": {
        "card": {
            "last4": "4242",
            "card_type": null,
            "card_network": null,
            "card_issuer": null,
            "card_issuing_country": null,
            "card_isin": "424242",
            "card_extended_bin": null,
            "card_exp_month": "08",
            "card_exp_year": "25",
            "card_holder_name": "joseph Doe",
            "payment_checks": {
                "address_line1_check": null,
                "address_postal_code_check": null,
                "cvc_check": "pass"
            },
            "authentication_data": null
        },
        "billing": null
    },
    "payment_token": null,
    "shipping": null,
    "billing": null,
    "order_details": null,
    "email": "abcdef123@gmail.com",
    "name": "John Doe",
    "phone": "999999999",
    "return_url": "https://google.com/",
    "authentication_type": "no_three_ds",
    "statement_descriptor_name": "joseph",
    "statement_descriptor_suffix": "JS",
    "next_action": null,
    "cancellation_reason": null,
    "error_code": null,
    "error_message": null,
    "unified_code": null,
    "unified_message": null,
    "payment_experience": null,
    "payment_method_type": "credit",
    "connector_label": null,
    "business_country": null,
    "business_label": "default",
    "business_sub_label": null,
    "allowed_payment_method_types": null,
    "ephemeral_key": {
        "customer_id": "StripeCustomer123",
        "created_at": 1719227786,
        "expires": 1719231386,
        "secret": "epk_3f099e2eb5f74a1db265f81af40082b3"
    },
    "manual_retry_allowed": false,
    "connector_transaction_id": "pi_3PVAsqCuXDMKrYZe1FwwRbez",
    "frm_message": null,
    "metadata": {
        "udf1": "value1",
        "login_date": "2019-09-10T10:11:12Z",
        "new_customer": "true"
    },
    "connector_metadata": null,
    "feature_metadata": null,
    "reference_id": "pi_3PVAsqCuXDMKrYZe1FwwRbez",
    "payment_link": null,
    "profile_id": "pro_rhbVuxclv1iy3M2pZkkI",
    "surcharge_details": null,
    "attempt_count": 1,
    "merchant_decision": null,
    "merchant_connector_id": "mca_sKlZxW37AYQNFv4Z4LGy",
    "incremental_authorization_allowed": null,
    "authorization_count": null,
    "incremental_authorizations": null,
    "external_authentication_details": null,
    "external_3ds_authentication_attempted": false,
    "expires_on": "2024-06-24T11:31:26.868Z",
    "fingerprint": null,
    "browser_info": {
        "language": "nl-NL",
        "time_zone": 0,
        "ip_address": "127.0.0.1",
        "user_agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.110 Safari/537.36",
        "color_depth": 24,
        "java_enabled": true,
        "screen_width": 1536,
        "accept_header": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8",
        "screen_height": 723,
        "java_script_enabled": true
    },
    "payment_method_id": null,
    "payment_method_status": null,
    "updated": "2024-06-24T11:16:29.856Z",
    "charges": null,
    "frm_metadata": null
}

Payments Sync

curl --location 'http://localhost:8080/payments/pay_HD0mGNbh3sY4SDzEJsPv?force_sync=true' \
--header 'Accept: application/json' \
--header 'api-key: dev_ng5enE9FcquL9C0eYO1Jr0E6U8V8vbriDijpN4EgVpr1o31zWAMrVzkIt3q5ZvRh'

Response

{
    "payment_id": "pay_HD0mGNbh3sY4SDzEJsPv",
    "merchant_id": "merchant_1718267057",
    "status": "succeeded",
    "amount": 250,
    "net_amount": 250,
    "amount_capturable": 0,
    "amount_received": 250,
    "connector": "stripe",
    "client_secret": "pay_HD0mGNbh3sY4SDzEJsPv_secret_EpmbV93ry8SiEMGIjCDF",
    "created": "2024-06-24T11:16:26.868Z",
    "currency": "USD",
    "customer_id": "StripeCustomer123",
    "customer": {
        "id": "StripeCustomer123",
        "name": "John Doe",
        "email": "abcdef123@gmail.com",
        "phone": "999999999",
        "phone_country_code": "+65"
    },
    "description": "Please Pay for your XYZ",
    "refunds": null,
    "disputes": null,
    "mandate_id": null,
    "mandate_data": null,
    "setup_future_usage": "off_session",
    "off_session": null,
    "capture_on": null,
    "capture_method": "automatic",
    "payment_method": "card",
    "payment_method_data": {
        "card": {
            "last4": "4242",
            "card_type": null,
            "card_network": null,
            "card_issuer": null,
            "card_issuing_country": null,
            "card_isin": "424242",
            "card_extended_bin": null,
            "card_exp_month": "08",
            "card_exp_year": "25",
            "card_holder_name": "joseph Doe",
            "payment_checks": {
                "cvc_check": "pass",
                "address_line1_check": null,
                "address_postal_code_check": null
            },
            "authentication_data": null
        },
        "billing": null
    },
    "payment_token": null,
    "shipping": null,
    "billing": null,
    "order_details": null,
    "email": "abcdef123@gmail.com",
    "name": "John Doe",
    "phone": "999999999",
    "return_url": "https://google.com/",
    "authentication_type": "no_three_ds",
    "statement_descriptor_name": "joseph",
    "statement_descriptor_suffix": "JS",
    "next_action": null,
    "cancellation_reason": null,
    "error_code": null,
    "error_message": null,
    "unified_code": null,
    "unified_message": null,
    "payment_experience": null,
    "payment_method_type": "credit",
    "connector_label": null,
    "business_country": null,
    "business_label": "default",
    "business_sub_label": null,
    "allowed_payment_method_types": null,
    "ephemeral_key": null,
    "manual_retry_allowed": false,
    "connector_transaction_id": "pi_3PVAsqCuXDMKrYZe1FwwRbez",
    "frm_message": null,
    "metadata": {
        "udf1": "value1",
        "login_date": "2019-09-10T10:11:12Z",
        "new_customer": "true"
    },
    "connector_metadata": null,
    "feature_metadata": null,
    "reference_id": "pi_3PVAsqCuXDMKrYZe1FwwRbez",
    "payment_link": null,
    "profile_id": "pro_rhbVuxclv1iy3M2pZkkI",
    "surcharge_details": null,
    "attempt_count": 1,
    "merchant_decision": null,
    "merchant_connector_id": "mca_sKlZxW37AYQNFv4Z4LGy",
    "incremental_authorization_allowed": null,
    "authorization_count": null,
    "incremental_authorizations": null,
    "external_authentication_details": null,
    "external_3ds_authentication_attempted": false,
    "expires_on": "2024-06-24T11:31:26.868Z",
    "fingerprint": null,
    "browser_info": {
        "language": "nl-NL",
        "time_zone": 0,
        "ip_address": "127.0.0.1",
        "user_agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.110 Safari/537.36",
        "color_depth": 24,
        "java_enabled": true,
        "screen_width": 1536,
        "accept_header": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8",
        "screen_height": 723,
        "java_script_enabled": true
    },
    "payment_method_id": null,
    "payment_method_status": null,
    "updated": "2024-06-24T11:16:29.856Z",
    "charges": null,
    "frm_metadata": null
}

Checklist

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

juspay / hyperswitch