> ## Documentation Index
> Fetch the complete documentation index at: https://docs.dodopayments.com/llms.txt
> Use this file to discover all available pages before exploring further.

# SvelteKit Adaptor

> Lär dig hur du integrerar Dodo Payments med ditt SvelteKit App Router-projekt med vår SvelteKit Adaptor. Täcker kassa, kundportal, webhooks och säker miljöinställning.

<CardGroup cols={2}>
  <Card title="Checkout Handler" icon="cart-shopping" href="#checkout-route-handler">
    Integrera Dodo Payments-kassan i din SvelteKit-app.
  </Card>

  <Card title="Customer Portal" icon="user" href="#customer-portal-route-handler">
    Låt kunder hantera prenumerationer och uppgifter.
  </Card>

  <Card title="Webhooks" icon="bell" href="#webhook-route-handler">
    Ta emot och behandla Dodo Payments webhook-händelser.
  </Card>
</CardGroup>

## Installation

<Steps>
  <Step title="Install the package">
    Kör följande kommando i projektets rotmapp:

    ```bash theme={null}
    npm install @dodopayments/sveltekit
    ```
  </Step>

  <Step title="Set up environment variables">
    Skapa en <code>.env</code>-fil i projektets rotmapp:

    ```env expandable theme={null}
    DODO_PAYMENTS_API_KEY=your-api-key
    DODO_PAYMENTS_WEBHOOK_KEY=your-webhook-secret
    DODO_PAYMENTS_ENVIRONMENT="test_mode" or "live_mode"
    DODO_PAYMENTS_RETURN_URL=https://yourdomain.com/checkout/success
    ```

    <Warning>
      Lägg aldrig upp din <code>.env</code>-fil eller hemligheter i versionshanteringen.
    </Warning>
  </Step>
</Steps>

## Exempel på Routhanterare

<Info>
  Alla exempel förutsätter att du använder SvelteKit App Router.
</Info>

<Tabs>
  <Tab title="Checkout Handler">
    <Info>
      Använd den här hanteraren för att integrera Dodo Payments-kassan i din SvelteKit-app. Stöder statiska (GET), dynamiska (POST) och session (POST) betalflöden.
    </Info>

    <CodeGroup>
      ```typescript SvelteKit Route Handler expandable theme={null}
      // src/routes/api/checkout/+server.ts
      import { Checkout } from "@dodopayments/sveltekit";
      import { DODO_PAYMENTS_API_KEY, DODO_PAYMENTS_RETURN_URL, DODO_PAYMENTS_ENVIRONMENT } from '$env/static/private';

      const checkoutGetHandler = Checkout({
          bearerToken: DODO_PAYMENTS_API_KEY,
          returnUrl: DODO_PAYMENTS_RETURN_URL,
          environment: DODO_PAYMENTS_ENVIRONMENT,
          type: "static",
      });

      const checkoutPostHandler = Checkout({
          bearerToken: DODO_PAYMENTS_API_KEY,
          returnUrl: DODO_PAYMENTS_RETURN_URL,
          environment: DODO_PAYMENTS_ENVIRONMENT,
          type: "session", // or "dynamic" for dynamic link
      });

      export const GET = checkoutGetHandler.GET;
      export const POST = checkoutPostHandler.POST;
      ```
    </CodeGroup>

    <CodeGroup>
      ```curl Static Checkout Curl example expandable theme={null}
      curl --request GET \
      --url 'https://example.com/api/checkout?productId=pdt_fqJhl7pxKWiLhwQR042rh' \
      --header 'User-Agent: insomnia/11.2.0' \
      --cookie mode=test
      ```
    </CodeGroup>

    <CodeGroup>
      ```curl Dynamic Checkout Curl example expandable theme={null}
      curl --request POST \
      --url https://example.com/api/checkout \
      --header 'Content-Type: application/json' \
      --header 'User-Agent: insomnia/11.2.0' \
      --cookie mode=test \
      --data '{ 
      "billing": {
        "city": "Texas",
        "country": "US",
        "state": "Texas",
        "street": "56, hhh",
        "zipcode": "560000"
      },
      "customer": {
        "email": "test@example.com",
        	"name": "test"
      },
      "metadata": {},
      "payment_link": true,
        "product_id": "pdt_QMDuvLkbVzCRWRQjLNcs",
        "quantity": 1,
        "billing_currency": "USD",
        "discount_codes": ["IKHZ23M9GQ"],
        "return_url": "https://example.com",
        "trial_period_days": 10
      }'
      ```
    </CodeGroup>

    <CodeGroup>
      ```curl Checkout Session Curl example expandable theme={null}
      curl --request POST \
      --url https://example.com/api/checkout \
      --header 'Content-Type: application/json' \
      --header 'User-Agent: insomnia/11.2.0' \
      --cookie mode=test \
      --data '{ 
      "product_cart": [
        {
          "product_id": "pdt_QMDuvLkbVzCRWRQjLNcs",
          "quantity": 1
        }
      ],
      "customer": {
        "email": "test@example.com",
        "name": "test"
      },
      "return_url": "https://example.com/success"
      }'
      ```
    </CodeGroup>
  </Tab>

  <Tab title="Customer Portal Handler">
    <Info>
      Använd den här hanteraren för att låta kunder hantera sina prenumerationer och uppgifter via Dodo Payments kundportal.
    </Info>

    <CodeGroup>
      ```typescript SvelteKit Route Handler expandable theme={null}
      // src/routes/api/checkout/+server.ts
      import { CustomerPortal } from "@dodopayments/sveltekit";
      import { DODO_PAYMENTS_API_KEY, DODO_PAYMENTS_RETURN_URL, DODO_PAYMENTS_ENVIRONMENT } from '$env/static/private';

      const customerPortalHandler = CustomerPortal({
          bearerToken: DODO_PAYMENTS_API_KEY,
          environment: DODO_PAYMENTS_ENVIRONMENT,
      });

      export const GET = customerPortalHandler.GET;
      ```
    </CodeGroup>
  </Tab>

  <Tab title="Webhook Handler">
    <Info>
      Använd den här hanteraren för att ta emot och behandla Dodo Payments webhook-händelser säkert i din SvelteKit-app.
    </Info>

    <CodeGroup>
      ```typescript SvelteKit Route Handler expandable theme={null}
      // src/routes/api/webhook/+server.ts
      import { Webhooks } from "@dodopayments/sveltekit";
      import { DODO_PAYMENTS_WEBHOOK_KEY } from '$env/static/private';

      export const POST = Webhooks({
          webhookKey: DODO_PAYMENTS_WEBHOOK_KEY,
          onPayload: async (payload) => {
              console.log(payload);
          }
      });
      ```
    </CodeGroup>
  </Tab>
</Tabs>

## Kassa Routhanterare

<Info>
  Dodo Payments stöder tre typer av betalflöden för att integrera betalningar på din webbplats, denna adapter stöder samtliga typer av betalflöden.
</Info>

* **Statiska Betalningslänkar:** Omedelbart delbara URL:er för snabb, kodfri betalningsinsamling.
* **Dynamiska Betalningslänkar:** Programmera generera betalningslänkar med anpassade detaljer med hjälp av API:er eller SDK:er.
* **Kassa Sessioner:** Skapa säkra, anpassningsbara kassaupplevelser med förkonfigurerade produktvagnar och kunddetaljer.

<AccordionGroup>
  <Accordion title="Static Checkout (GET)">
    ### Frågeparametrar

    <ParamField query="productId" type="string" required>
      Produktidentifierare (t.ex. <code>?productId=pdt\_nZuwz45WAs64n3l07zpQR</code>).
    </ParamField>

    <ParamField query="quantity" type="integer">
      Produktens antal.
    </ParamField>

    <ParamField query="fullName" type="string">
      Kundens fullständiga namn.
    </ParamField>

    <ParamField query="firstName" type="string">
      Kundens förnamn.
    </ParamField>

    <ParamField query="lastName" type="string">
      Kundens efternamn.
    </ParamField>

    <ParamField query="email" type="string">
      Kundens e-postadress.
    </ParamField>

    <ParamField query="country" type="string">
      Kundens land.
    </ParamField>

    <ParamField query="addressLine" type="string">
      Kundens adressrad.
    </ParamField>

    <ParamField query="city" type="string">
      Kundens stad.
    </ParamField>

    <ParamField query="state" type="string">
      Kundens delstat/provins.
    </ParamField>

    <ParamField query="zipCode" type="string">
      Kundens postnummer.
    </ParamField>

    <ParamField query="disableFullName" type="boolean">
      Inaktivera fältet för fullständigt namn.
    </ParamField>

    <ParamField query="disableFirstName" type="boolean">
      Inaktivera fältet för förnamn.
    </ParamField>

    <ParamField query="disableLastName" type="boolean">
      Inaktivera fältet för efternamn.
    </ParamField>

    <ParamField query="disableEmail" type="boolean">
      Inaktivera e-postfältet.
    </ParamField>

    <ParamField query="disableCountry" type="boolean">
      Inaktivera fältet för land.
    </ParamField>

    <ParamField query="disableAddressLine" type="boolean">
      Inaktivera adressradfältet.
    </ParamField>

    <ParamField query="disableCity" type="boolean">
      Inaktivera fältet för stad.
    </ParamField>

    <ParamField query="disableState" type="boolean">
      Inaktivera fältet för delstat.
    </ParamField>

    <ParamField query="disableZipCode" type="boolean">
      Inaktivera fältet för postnummer.
    </ParamField>

    <ParamField query="paymentCurrency" type="string">
      Ange valuta för betalningen (t.ex. <code>USD</code>).
    </ParamField>

    <ParamField query="showCurrencySelector" type="boolean">
      Visa valutaväljare.
    </ParamField>

    <ParamField query="paymentAmount" type="integer">
      Ange beloppet för betalningen (t.ex. <code>1000</code> för \$10.00).
    </ParamField>

    <ParamField query="showDiscounts" type="boolean">
      Visa rabattfält.
    </ParamField>

    <ParamField query="metadata_*" type="string">
      Alla frågeparametrar som börjar med <code>metadata\_</code> vidarebefordras som metadata.
    </ParamField>

    <Warning>
      Om <code>productId</code> saknas returnerar hanteraren ett 400-svar. Ogiltiga frågeparametrar resulterar också i ett 400-svar.
    </Warning>

    ### Svarformat

    Statisk kassa returnerar ett JSON-svar med kassa-URL:en:

    ```json theme={null}
    {
      "checkout_url": "https://checkout.dodopayments.com/"
    }
    ```
  </Accordion>

  <Accordion title="Dynamic Checkout (POST)">
    * Skicka parametrarna som JSON-body i en POST-begäran.
    * Stöder både engångs- och återkommande betalningar.
    * För en komplett lista över stödda POST-body-fält, hänvisa till:
      * [Request body for a One Time Payment Product](https://docs.dodopayments.com/api-reference/payments/post-payments)
      * [Request body for a Subscription Product](https://docs.dodopayments.com/api-reference/subscriptions/post-subscriptions)

    ### Svarformat

    Dynamisk kassa returnerar ett JSON-svar med kassa-URL:en:

    ```json theme={null}
    {
      "checkout_url": "https://checkout.dodopayments.com/"
    }
    ```
  </Accordion>

  <Accordion title="Checkout Sessions (POST)">
    Checkout-sessioner erbjuder en säkrare, värdhostad kassaupplevelse som hanterar hela betalflödet för både engångsköp och prenumerationer med full anpassningskontroll.

    Se [Kassa Sessioner Integrationsguide](https://docs.dodopayments.com/developer-resources/checkout-session) för mer information och en komplett lista över stödda fält.

    ### Svarformat

    Kassa sessioner returnerar ett JSON-svar med kassa-URL:en:

    ```json theme={null}
    {
      "checkout_url": "https://checkout.dodopayments.com/session/..."
    }
    ```
  </Accordion>
</AccordionGroup>

## Kundportal Routhanterare

Kundportalens rutt-hanterare gör det möjligt för dig att sömlöst integrera Dodo Payments kundportal i din SvelteKit-applikation.

### Frågeparametrar

<ParamField query="customer_id" type="string" required>
  Kundens ID för portalsessionen (t.ex. <code>?customer\_id=cus\_123</code>).
</ParamField>

<ParamField query="send_email" type="boolean">
  Om det sätts till <code>true</code> skickas ett e-postmeddelande till kunden med portallänken.
</ParamField>

<Warning>
  Returnerar 400 om <code>customer\_id</code> saknas.
</Warning>

## Webhook Routhanterare

* **Metod:** Endast POST-förfrågningar stöds. Andra metoder returnerar 405.
* **Signaturverifiering:** Verifierar webhook-signaturen med <code>webhookKey</code>. Returnerar 401 om verifieringen misslyckas.
* **Payloadvalidering:** Valideras med Zod. Returnerar 400 för ogiltiga payloads.
* **Felhantering:**
  * 401: Ogiltig signatur
  * 400: Ogiltig payload
  * 500: Internt fel under verifiering
* **Händelse-routing:** Anropar den lämpliga händelsehanteraren baserat på payload-typen.

### Stödda webhook-händelsehanterare

<CodeGroup>
  ```typescript Typescript expandable theme={null}
  onPayload?: (payload: WebhookPayload) => Promise<void>;
  onPaymentSucceeded?: (payload: WebhookPayload) => Promise<void>;
  onPaymentFailed?: (payload: WebhookPayload) => Promise<void>;
  onPaymentProcessing?: (payload: WebhookPayload) => Promise<void>;
  onPaymentCancelled?: (payload: WebhookPayload) => Promise<void>;
  onRefundSucceeded?: (payload: WebhookPayload) => Promise<void>;
  onRefundFailed?: (payload: WebhookPayload) => Promise<void>;
  onDisputeOpened?: (payload: WebhookPayload) => Promise<void>;
  onDisputeExpired?: (payload: WebhookPayload) => Promise<void>;
  onDisputeAccepted?: (payload: WebhookPayload) => Promise<void>;
  onDisputeCancelled?: (payload: WebhookPayload) => Promise<void>;
  onDisputeChallenged?: (payload: WebhookPayload) => Promise<void>;
  onDisputeWon?: (payload: WebhookPayload) => Promise<void>;
  onDisputeLost?: (payload: WebhookPayload) => Promise<void>;
  onSubscriptionActive?: (payload: WebhookPayload) => Promise<void>;
  onSubscriptionOnHold?: (payload: WebhookPayload) => Promise<void>;
  onSubscriptionRenewed?: (payload: WebhookPayload) => Promise<void>;
  onSubscriptionPlanChanged?: (payload: WebhookPayload) => Promise<void>;
  onSubscriptionCancelled?: (payload: WebhookPayload) => Promise<void>;
  onSubscriptionFailed?: (payload: WebhookPayload) => Promise<void>;
  onSubscriptionExpired?: (payload: WebhookPayload) => Promise<void>;
  onSubscriptionUpdated?: (payload: WebhookPayload) => Promise<void>;
  onLicenseKeyCreated?: (payload: WebhookPayload) => Promise<void>;
  onAbandonedCheckoutDetected?: (payload: WebhookPayload) => Promise<void>;
  onAbandonedCheckoutRecovered?: (payload: WebhookPayload) => Promise<void>;
  onDunningStarted?: (payload: WebhookPayload) => Promise<void>;
  onDunningRecovered?: (payload: WebhookPayload) => Promise<void>;
  onCreditAdded?: (payload: WebhookPayload) => Promise<void>;
  onCreditDeducted?: (payload: WebhookPayload) => Promise<void>;
  onCreditExpired?: (payload: WebhookPayload) => Promise<void>;
  onCreditRolledOver?: (payload: WebhookPayload) => Promise<void>;
  onCreditRolloverForfeited?: (payload: WebhookPayload) => Promise<void>;
  onCreditOverageCharged?: (payload: WebhookPayload) => Promise<void>;
  onCreditManualAdjustment?: (payload: WebhookPayload) => Promise<void>;
  onCreditBalanceLow?: (payload: WebhookPayload) => Promise<void>;
  ```
</CodeGroup>

***

## Prompt för LLM

```

You are an expert SvelteKit developer assistant. Your task is to guide a user through integrating the @dodopayments/sveltekit adapter into their existing SvelteKit project.

The @dodopayments/sveltekit adapter provides route handlers for Dodo Payments' Checkout, Customer Portal, and Webhook functionalities, designed for the SvelteKit App Router.

First, install the necessary packages. Use the package manager appropriate for your project (npm, yarn, or bun) based on the presence of lock files (e.g., package-lock.json for npm, yarn.lock for yarn, bun.lockb for bun):

npm install @dodopayments/sveltekit

Here's how you should structure your response:

    Ask the user which functionalities they want to integrate.

"Which parts of the @dodopayments/sveltekit adapter would you like to integrate into your project? You can choose one or more of the following:

    Checkout Route Handler (for handling product checkouts)

    Customer Portal Route Handler (for managing customer subscriptions/details)

    Webhook Route Handler (for receiving Dodo Payments webhook events)

    All (integrate all three)"

    Based on the user's selection, provide detailed integration steps for each chosen functionality.

If Checkout Route Handler is selected:

Purpose: This handler manages different types of checkout flows. All checkout types (static, dynamic, and sessions) return JSON responses with checkout URLs for programmatic handling.
File Creation: Create a new file at app/checkout/route.ts in your SvelteKit project.

Code Snippet:

// src/routes/api/checkout/+server.ts
import { Checkout } from "@dodopayments/sveltekit";
import { DODO_PAYMENTS_API_KEY, DODO_PAYMENTS_RETURN_URL, DODO_PAYMENTS_ENVIRONMENT } from '$env/static/private';

const checkoutGetHandler = Checkout({
    bearerToken: DODO_PAYMENTS_API_KEY,
    returnUrl: DODO_PAYMENTS_RETURN_URL,
    environment: DODO_PAYMENTS_ENVIRONMENT,
    type: "static",
});

const checkoutPostHandler = Checkout({
    bearerToken: DODO_PAYMENTS_API_KEY,
    returnUrl: DODO_PAYMENTS_RETURN_URL,
    environment: DODO_PAYMENTS_ENVIRONMENT,
    type: "session", // or "dynamic" for dynamic link
});

export const GET = checkoutGetHandler.GET;
export const POST = checkoutPostHandler.POST;

Configuration & Usage:

    bearerToken: Your Dodo Payments API key. It's recommended to set this via the DODO_PAYMENTS_API_KEY environment variable.

    returnUrl: (Optional) The URL to redirect the user to after a successful checkout.

    environment: (Optional) Set to "test_mode" for testing, or omit/set to "live_mode" for production.

    type: (Optional) Set to "static" for GET/static checkout, "dynamic" for POST/dynamic checkout, or "session" for POST/checkout sessions. Defaults to "static".

Static Checkout (GET) Query Parameters:

    productId (required): Product identifier (e.g., ?productId=pdt_nZuwz45WAs64n3l07zpQR)

    quantity (optional): Quantity of the product

    Customer Fields (optional): fullName, firstName, lastName, email, country, addressLine, city, state, zipCode

    Disable Flags (optional, set to true to disable): disableFullName, disableFirstName, disableLastName, disableEmail, disableCountry, disableAddressLine, disableCity, disableState, disableZipCode

    Advanced Controls (optional): paymentCurrency, showCurrencySelector, paymentAmount, showDiscounts

    Metadata (optional): Any query parameter starting with metadata_ (e.g., ?metadata_userId=abc123)
    
    Returns: {"checkout_url": "https://checkout.dodopayments.com/..."}

Dynamic Checkout (POST) - Returns JSON with checkout_url: Parameters are sent as a JSON body. Supports both one-time and recurring payments. Returns: {"checkout_url": "https://checkout.dodopayments.com/..."}. For a complete list of supported POST body fields, refer to:

    Docs - One Time Payment Product: https://docs.dodopayments.com/api-reference/payments/post-payments

    Docs - Subscription Product: https://docs.dodopayments.com/api-reference/subscriptions/post-subscriptions

Checkout Sessions (POST) - (Recommended) A more customizable checkout experience. Returns JSON with checkout_url: Parameters are sent as a JSON body. Supports both one-time and recurring payments. Returns: {"checkout_url": "https://checkout.dodopayments.com/session/..."}. For a complete list of supported fields, refer to:

  Checkout Sessions Integration Guide: https://docs.dodopayments.com/developer-resources/checkout-session

Error Handling: If productId is missing or other parameters are invalid, the handler will return a 400 response.

If Customer Portal Route Handler is selected:

Purpose: This handler redirects authenticated users to their Dodo Payments customer portal.
File Creation: Create a new file at app/customer-portal/route.ts in your SvelteKit project.

Code Snippet:

// src/routes/api/checkout/+server.ts
import { CustomerPortal } from "@dodopayments/sveltekit";
import { DODO_PAYMENTS_API_KEY, DODO_PAYMENTS_RETURN_URL, DODO_PAYMENTS_ENVIRONMENT } from '$env/static/private';

const customerPortalHandler = CustomerPortal({
    bearerToken: DODO_PAYMENTS_API_KEY,
    environment: DODO_PAYMENTS_ENVIRONMENT,
});

export const GET = customerPortalHandler.GET;

Query Parameters:

    customer_id (required): The customer ID for the portal session (e.g., ?customer_id=cus_123)

    send_email (optional, boolean): If set to true, sends an email to the customer with the portal link.

    Returns 400 if customer_id is missing.

If Webhook Route Handler is selected:

Purpose: This handler processes incoming webhook events from Dodo Payments, allowing your application to react to events like successful payments, refunds, or subscription changes.
File Creation: Create a new file at app/api/webhook/dodo-payments/route.ts in your SvelteKit project.

Code Snippet:

// src/routes/api/webhook/+server.ts
import { Webhooks } from "@dodopayments/sveltekit";
import { DODO_PAYMENTS_WEBHOOK_KEY } from '$env/static/private';

export const POST = Webhooks({
    webhookKey: DODO_PAYMENTS_WEBHOOK_KEY,
    onPayload: async (payload) => {
        console.log(payload);
    }
});

Handler Details:

    Method: Only POST requests are supported. Other methods return 405.

    Signature Verification: The handler verifies the webhook signature using the webhookKey and returns 401 if verification fails.

    Payload Validation: The payload is validated with Zod. Returns 400 for invalid payloads.

Error Handling:

    401: Invalid signature

    400: Invalid payload

    500: Internal error during verification

Event Routing: Calls the appropriate event handler based on the payload type.

Supported Webhook Event Handlers:

    onPayload?: (payload: WebhookPayload) => Promise<void>

    onPaymentSucceeded?: (payload: WebhookPayload) => Promise<void>

    onPaymentFailed?: (payload: WebhookPayload) => Promise<void>

    onPaymentProcessing?: (payload: WebhookPayload) => Promise<void>

    onPaymentCancelled?: (payload: WebhookPayload) => Promise<void>

    onRefundSucceeded?: (payload: WebhookPayload) => Promise<void>

    onRefundFailed?: (payload: WebhookPayload) => Promise<void>

    onDisputeOpened?: (payload: WebhookPayload) => Promise<void>

    onDisputeExpired?: (payload: WebhookPayload) => Promise<void>

    onDisputeAccepted?: (payload: WebhookPayload) => Promise<void>

    onDisputeCancelled?: (payload: WebhookPayload) => Promise<void>

    onDisputeChallenged?: (payload: WebhookPayload) => Promise<void>

    onDisputeWon?: (payload: WebhookPayload) => Promise<void>

    onDisputeLost?: (payload: WebhookPayload) => Promise<void>

    onSubscriptionActive?: (payload: WebhookPayload) => Promise<void>

    onSubscriptionOnHold?: (payload: WebhookPayload) => Promise<void>

    onSubscriptionRenewed?: (payload: WebhookPayload) => Promise<void>

    onSubscriptionPlanChanged?: (payload: WebhookPayload) => Promise<void>

    onSubscriptionCancelled?: (payload: WebhookPayload) => Promise<void>

    onSubscriptionFailed?: (payload: WebhookPayload) => Promise<void>

    onSubscriptionExpired?: (payload: WebhookPayload) => Promise<void>

    onSubscriptionUpdated?: (payload: WebhookPayload) => Promise<void>

    onLicenseKeyCreated?: (payload: WebhookPayload) => Promise<void>

    onAbandonedCheckoutDetected?: (payload: WebhookPayload) => Promise<void>

    onAbandonedCheckoutRecovered?: (payload: WebhookPayload) => Promise<void>

    onDunningStarted?: (payload: WebhookPayload) => Promise<void>

    onDunningRecovered?: (payload: WebhookPayload) => Promise<void>

    onCreditAdded?: (payload: WebhookPayload) => Promise<void>

    onCreditDeducted?: (payload: WebhookPayload) => Promise<void>

    onCreditExpired?: (payload: WebhookPayload) => Promise<void>

    onCreditRolledOver?: (payload: WebhookPayload) => Promise<void>

    onCreditRolloverForfeited?: (payload: WebhookPayload) => Promise<void>

    onCreditOverageCharged?: (payload: WebhookPayload) => Promise<void>

    onCreditManualAdjustment?: (payload: WebhookPayload) => Promise<void>

    onCreditBalanceLow?: (payload: WebhookPayload) => Promise<void>

    Environment Variable Setup:

To ensure the adapter functions correctly, you will need to manually set up the following environment variables in your SvelteKit project's deployment environment (e.g., Vercel, Netlify, AWS, etc.):

    DODO_PAYMENTS_API_KEY: Your Dodo Payments API Key (required for Checkout and Customer Portal).

    RETURN_URL: (Optional) The URL to redirect to after a successful checkout (for Checkout handler).

    DODO_PAYMENTS_WEBHOOK_SECRET: Your Dodo Payments Webhook Secret (required for Webhook handler).

Example .env file:

DODO_PAYMENTS_API_KEY=your-api-key
DODO_PAYMENTS_WEBHOOK_KEY=your-webhook-secret
DODO_PAYMENTS_RETURN_URL=your-return-url
DODO_PAYMENTS_ENVIRONMENT="test_mode" or "live_mode"

Usage in your code:

bearerToken: process.env.DODO_PAYMENTS_API_KEY
webhookKey: process.env.DODO_PAYMENTS_WEBHOOK_KEY

Important: Never commit sensitive environment variables directly into your version control. Use environment variables for all sensitive information.

If the user needs assistance setting up environment variables for their specific deployment environment, ask them what platform they are using (e.g., Vercel, Netlify, AWS, etc.), and provide guidance. You can also add comments to their PR or chat depending on the context

```