### Install Stripe Webhook Plug

Source: https://hexdocs.pm/stripity_stripe/3.3.1/Stripe.WebhookPlug.html

Configure the Stripe.WebhookPlug in your application's endpoint before Plug.Parsers. Ensure the 'at' path matches your Stripe webhook configuration.

```elixir
plug Stripe.WebhookPlug,
  at: "/webhook/stripe",
  handler: MyAppWeb.StripeHandler,
  secret: "whsec_******"
```

--------------------------------

### Runtime Configuration with Function Secret

Source: https://hexdocs.pm/stripity_stripe/3.3.1/Stripe.WebhookPlug.html

Provide a function reference for the webhook secret to enable dynamic loading at runtime. The function should be in the format &Mod.fun/arity.

```elixir
plug Stripe.WebhookPlug,
  at: "/webhook/stripe",
  handler: MyAppWeb.StripeHandler,
  secret: &MyAppWeb.Secrets.stripe_webhook_secret/0 # a remote function in the format &Mod.fun/arity
```

--------------------------------

### Runtime Configuration with Tuple Secret

Source: https://hexdocs.pm/stripity_stripe/3.3.1/Stripe.WebhookPlug.html

Use a tuple to dynamically fetch the webhook secret at runtime, suitable for configurations loaded from files like runtime.exs or OTP apps.

```elixir
plug Stripe.WebhookPlug,
  at: "/webhook/stripe",
  handler: MyAppWeb.StripeHandler,
  secret: {Application, :get_env, [:myapp, :stripe_webhook_secret]}
```

--------------------------------

### Create Custom Stripe Event Handler

Source: https://hexdocs.pm/stripity_stripe/3.3.1/Stripe.WebhookPlug.html

Implement the Stripe.WebhookHandler behavior to process incoming Stripe events. Define a handle_event/1 function to manage specific event types or a default case for unhandled events.

```elixir
defmodule MyAppWeb.StripeHandler do
  @behaviour Stripe.WebhookHandler

  @impl true
  def handle_event(%Stripe.Event{type: "charge.succeeded"} = event) do
    # TODO: handle the charge.succeeded event
  end

  @impl true
  def handle_event(%Stripe.Event{type: "invoice.payment_failed"} = event) do
    # TODO: handle the invoice.payment_failed event
  end

  # Return HTTP 200 for unhandled events
  @impl true
  def handle_event(_event), do: :ok
end
```

--------------------------------

### Include Configured Secret in Endpoint

Source: https://hexdocs.pm/stripity_stripe/3.3.1/Stripe.WebhookPlug.html

Reference the application's configured webhook secret when setting up the Stripe.WebhookPlug in your endpoint.

```elixir
plug Stripe.WebhookPlug,
  at: "/webhook/stripe",
  handler: MyAppWeb.StripeHandler,
  secret: Application.get_env(:myapp, :stripe_webhook_secret)
```

--------------------------------

### Configure Webhook Secret in App Config

Source: https://hexdocs.pm/stripity_stripe/3.3.1/Stripe.WebhookPlug.html

Store the Stripe webhook secret in your application's configuration file. This secret can then be referenced when configuring the Stripe.WebhookPlug.

```elixir
config :myapp,
  # [...]
  stripe_webhook_secret: "whsec_******"
```

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