Enhance Webhooks Documentation

- Improved clarity and structure of the Webhooks documentation.
- Expanded explanations on webhook handling and integration with Django
  Payments.
- Added detailed steps for configuring webhooks in Stripe.
- Included instructions for testing webhooks using Stripe CLI.
- Ensured compliance with .rst formatting for seamless integration into
  the existing documentation system.

Author: ssganesh035

docs/webhooks.rst

@@ -3,121 +3,147 @@
 Webhooks
 *********
 
-Webhooks are a crucial component in connecting your Django Payments application
-with external payment gateways like Stripe, PayPal, or Braintree. They enable
-real-time notifications or events from the payment gateway to be sent to your
-application, eliminating the need for continuous polling or manual API
-requests. With webhooks, your application can stay in sync with payment gateway
-updates, such as successful payments, subscription changes, or refunds.
-
-In the context of Django Payments, webhooks provide a means for payment
-gateways to send event notifications directly to your Django application. By
-configuring the payment gateway to send these notifications to a specific URL
-endpoint within your application, you can create a webhook handler that
-receives and processes these events. This allows you to update your
-application's internal state, trigger actions, or send user notifications based
-on payment-related events.
-
+Webhooks are an essential mechanism for integrating your Django Payments
+application with external payment gateways like Stripe, PayPal, or Braintree.
+They allow real-time event notifications to be sent to your application without
+requiring continuous polling or manual API requests. With webhooks, your
+application stays synchronized with payment gateway updates, such as successful
+payments, subscription status changes, or refunds.
+
+In the context of Django Payments, webhooks enable payment gateways to send
+event notifications directly to your Django application. By configuring the
+payment gateway to send these notifications to a specific URL endpoint in your
+application, you can create a webhook handler to process these events. This
+lets you update your internal state, trigger relevant actions, or send user
+notifications based on payment-related events.
 
 URL Structure
 =============
-The webhook URL structure in django-payments follows this pattern:
 
-``{protocol}://{host}/payments/process/{variant}/``
+The webhook URL structure in django-payments follows this pattern::
 
-Where:
+   {protocol}://{host}/payments/process/{variant}/
 
-- ``{protocol}``: Configured in ``PAYMENT_PROTOCOL`` (typically "http" or "https")
-- ``{host}``: Configured in ``PAYMENT_HOST``
-- ``{variant}``: The name you've configured in PAYMENT_VARIANTS
+Where:
 
+- ``{protocol}``: Defined in ``PAYMENT_PROTOCOL`` (typically "http" or "https").
+- ``{host}``: Defined in ``PAYMENT_HOST``.
+- ``{variant}``: The payment provider name as configured in ``PAYMENT_VARIANTS``.
 
 For example, with this configuration:
 
 .. code-block:: python
 
-  PAYMENT_VARIANTS = {
-      'stripe': (  # <-- This is your variant name
-          'payments.stripe.StripeProviderV3',
-          {
-              'api_key': 'sk_test_123456',
-              'use_token': true,
-              'endpoint_secret': 'whsec_123456',
-              'secure_endpoint': true
-          }
-      )
-  }
+   PAYMENT_VARIANTS = {
+       'stripe': (  # <-- This is your variant name
+           'payments.stripe.StripeProviderV3',
+           {
+               'api_key': 'sk_test_123456',
+               'use_token': True,
+               'endpoint_secret': 'whsec_123456',
+               'secure_endpoint': True
+           }
+       )
+   }
 
-  PAYMENT_HOST = 'your-app.com'
-  PAYMENT_PROTOCOL = 'https'
+   PAYMENT_HOST = 'your-app.com'
+   PAYMENT_PROTOCOL = 'https'
 
-Your webhook URL would be:
-``https://your-app.com/payments/process/stripe/``
+Your webhook URL would be::
 
-.. note::
+   https://your-app.com/payments/process/stripe/
 
-  Make sure the URL matches exactly, including the trailing slash. A common source
-  of 404 errors is using the wrong URL pattern or forgetting the trailing slash.
+.. note::
 
+   Ensure the URL matches exactly, including the trailing slash. A common cause
+   of 404 errors is an incorrect URL pattern or a missing trailing slash.
 
-Stripe
-======
+Stripe Webhooks
+===============
 
 Setting up Webhooks in Stripe
-To receive payment notifications and updates from Stripe, you need to set up
-webhooks. Follow these steps to configure webhooks in your Stripe Dashboard:
+-----------------------------
+
+To receive real-time payment notifications from Stripe, follow these steps:
+
+#. Log in to your `Stripe Dashboard <https://dashboard.stripe.com/>`_.
+#. In the left sidebar, navigate to **Developers** → **Webhooks**.
+#. Click **+ Add endpoint** to create a new webhook listener.
+#. Enter the webhook URL in the "Endpoint URL" field. The URL should follow the
+   format::
+
+      https://your-app.com/payments/process/{variant}/
+
+   where ``{variant}`` is the name configured in ``PAYMENT_VARIANTS``.
+   Example: ``https://your-app.com/payments/process/stripe/``
+
+#. Select the events you want to receive notifications for. At a minimum,
+   include these:
+
+   - ``checkout.session.async_payment_failed``
+   - ``checkout.session.async_payment_succeeded``
+   - ``checkout.session.completed``
+   - ``checkout.session.expired``
+
+#. Click **Add endpoint** to save the webhook configuration.
+#. Copy the **Signing secret** provided by Stripe. You will need this to verify
+   webhook authenticity in your Django application.
+#. Test the webhook by sending a test event using Stripe's **Send test
+   webhook** feature.
+
+Testing Webhooks Locally
+------------------------
+
+During development, you can use the `Stripe CLI
+<https://stripe.com/docs/stripe-cli#install>`_ to test webhooks by forwarding
+Stripe events to your local server.
+
+#. Install the Stripe CLI and log in:
+
+   .. code-block:: bash
+
+      stripe login
+
+#. Start listening for events and forward them to your local server:
 
-1. Log in to your `Stripe Dashboard <https://dashboard.stripe.com/>`_.
-#. In the left sidebar, click on **Developers** and then select **Webhooks**.
-#. Click on the "+ Add endpoint" button to create a new webhook listener.
-#. In the "Endpoint URL" field, enter the URL for the Stripe variant in your
-   Django Payments application. This URL should follow the pattern:
-   ``https://your-app.com/payments/process/{variant}/``, where ``{variant}`` is
-   the name you've configured in your PAYMENT_VARIANTS setting.
-   For example: ``https://your-app.com/payments/process/stripe/``
-#. From the "Events to send" dropdown, choose the specific events you want to
-   receive notifications for. You need (at least) these events:
+   .. code-block:: bash
 
-   - checkout.session.async_payment_failed
-   - checkout.session.async_payment_succeeded
-   - checkout.session.completed
-   - checkout.session.expired
+      stripe listen --forward-to localhost:8000/payments/process/stripe/ \
+         -e checkout.session.async_payment_failed,checkout.session.async_payment_succeeded,checkout.session.completed,checkout.session.expired
 
-#. Click on the "Add endpoint" button to save your webhook listener.
-#. Once the webhook is created, you will see its details in the "Webhooks"
-   section. Take note of the "Signing secret" provided by Stripe as you will
-   need it later when configuring the webhook handler in your Django application.
-#. Test the webhook by sending a test event to your endpoint. Stripe provides a
-   "Send test webhook" button on the webhook details page. Use this feature to
-   ensure your endpoint is correctly configured and can receive and process
-   events from Stripe.
+#. In another terminal, trigger test events:
 
+   .. code-block:: bash
 
-Testing with Stripe CLI
-----------------------
+      stripe trigger checkout.session.completed
 
-The `Stripe CLI <https://stripe.com/docs/stripe-cli#install>`_ provides a simple
-way to test webhooks during local development by forwarding Stripe events to
-your local server. After installing and running ``stripe login``, you can start
-forwarding events to your local Django server with:
+Alternative Webhook Testing Tools
+---------------------------------
 
-.. code-block:: bash
+Apart from Stripe's built-in tools, you can test your webhooks using external
+services:
 
-   # Start webhook forwarding
-   stripe listen --forward-to localhost:8000/payments/process/stripe/ \
-      -e checkout.session.async_payment_failed,checkout.session.async_payment_succeeded,checkout.session.completed,checkout.session.expired
+- `Beeceptor <https://beeceptor.com/>`_: A free webhook testing tool that
+  allows you to inspect and debug webhook requests before integrating them into
+  your application.
+- `RequestBin by Pipedream <https://pipedream.com/requestbin>`_: Provides a
+  public or private endpoint where you can inspect incoming webhook requests in
+  real-time.
 
-   # In another terminal, trigger test events
-   stripe trigger checkout.session.completed
+These tools can be useful for verifying request payloads and debugging webhook
+events outside of your local development environment.
 
+Security Best Practices
+-----------------------
 
 .. note::
 
-  It's essential to secure your webhook endpoint and verify the authenticity of
-  the events sent by Stripe. It's not recommended to use `secure_endpoint`
-  set to false in production.
+   Always validate incoming webhook requests to ensure they originate from
+   Stripe. Use the signing secret to verify authenticity before processing any
+   event.
 
 .. warning::
 
-  Remember to setup ``PAYMENT_HOST`` and ``PAYMENT_PROTOCOL`` in your settings file,
-  otherwise the webhooks won't work, as defined in :ref:`settings`.
+   Ensure ``PAYMENT_HOST`` and ``PAYMENT_PROTOCOL`` are correctly set in your
+   Django settings. If they are misconfigured, webhooks will not work as
+   expected.