> ## 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.

# Supabase Edge Functions

> Deploy DodoPayments webhooks to Supabase Edge Functions

<Card title="GitHub Repository" icon="github" href="https://github.com/dodopayments/cloud-functions/tree/main/supabase">
  Complete source code and setup guide
</Card>

<Tip>
  <strong>Checkout the complete starter kit for supabase</strong><br />
  A minimal subscription starter kit built with Next.js, Supabase, and Dodo Payments. This boilerplate helps you quickly set up a subscription-based SaaS with authentication, payments, and webhooks.

  <a href="https://github.com/dodopayments/dodo-supabase-subscription-starter" target="_blank" rel="noopener noreferrer">
    Dodo Payments Supabase Subscription Starter
  </a>
</Tip>

## Quick Setup

### 1. Prerequisites

* [Supabase account](https://supabase.com/dashboard)
* A Supabase project created
* DodoPayments API key from [dashboard](https://app.dodopayments.com/)

### 2. Authenticate & Link

```bash theme={null}
npx supabase login
git clone https://github.com/dodopayments/cloud-functions.git
cd cloud-functions/supabase
npx supabase link --project-ref your-project-ref
```

Get your project ref from [Supabase Dashboard](https://supabase.com/dashboard) → Project Settings

### 3. Database Setup

1. Go to your [Supabase Dashboard](https://supabase.com/dashboard)
2. Open the SQL Editor
3. Create a new query
4. Copy and paste the entire contents of [`schema.sql`](#database-schema)
5. Run the query

### 4. Set Initial Secrets

Supabase automatically provides `SUPABASE_URL` and `SUPABASE_SERVICE_ROLE_KEY` at runtime.

```bash theme={null}
npx supabase secrets set DODO_PAYMENTS_API_KEY=your-api-key
```

> **Note:** We'll set `DODO_PAYMENTS_WEBHOOK_KEY` after deployment once you have your webhook URL.

### 5. Deploy

The function is already set up in `functions/webhook/index.ts` - just deploy it:

```bash theme={null}
npm run deploy
```

### 6. Get Your Webhook URL

Your webhook URL is:

```
https://[project-ref].supabase.co/functions/v1/webhook
```

### 7. Register Webhook in DodoPayments Dashboard

1. Go to [DodoPayments Dashboard](https://app.dodopayments.com) → Developer → Webhooks
2. Create a new webhook endpoint
3. Configure your webhook URL as the endpoint
4. Enable these subscription events:
   * `subscription.active`
   * `subscription.cancelled`
   * `subscription.renewed`
5. Copy the **Signing Secret**

### 8. Set Webhook Key & Redeploy

```bash theme={null}
npx supabase secrets set DODO_PAYMENTS_WEBHOOK_KEY=your-webhook-signing-key
npm run deploy
```

## What It Does

Processes subscription events and stores them in Supabase PostgreSQL:

* **subscription.active** - Creates/updates customer and subscription records
* **subscription.cancelled** - Marks subscription as cancelled
* **subscription.renewed** - Updates next billing date

## Key Features

✅ **Signature verification** - Using the dodopayments library\
✅ **Idempotency** - Prevents duplicate processing with webhook IDs\
✅ **Event logging** - Complete audit trail in `webhook_events` table\
✅ **Error handling** - Logged and retryable

> **Note:** This implementation demonstrates handling three core subscription events (`subscription.active`, `subscription.cancelled`, `subscription.renewed`) with minimal fields. You can easily extend it to support additional event types and fields based on your requirements.

## Configuration Files

<CodeGroup>
  ```json package.json theme={null}
  {
    "name": "dodo-webhook-supabase",
    "version": "1.0.0",
    "type": "module",
    "description": "DodoPayments Webhook Handler for Supabase Edge Functions",
    "scripts": {
      "dev": "npx supabase functions serve webhook --no-verify-jwt --workdir ..",
      "deploy": "npx supabase functions deploy webhook --no-verify-jwt --workdir .."
    }
  }
  ```

  ```json tsconfig.json theme={null}
  {
    "compilerOptions": {
      "target": "ES2022",
      "module": "ES2022",
      "lib": ["ES2022", "DOM"],
      "moduleResolution": "bundler",
      "esModuleInterop": true,
      "strict": true,
      "skipLibCheck": true,
      "resolveJsonModule": true,
      "allowSyntheticDefaultImports": true,
      "forceConsistentCasingInFileNames": true,
      "isolatedModules": true
    },
    "include": ["functions/webhook/*.ts"],
    "exclude": ["node_modules"]
  }
  ```
</CodeGroup>

## Database Schema

<CodeGroup>
  ```sql schema.sql expandable theme={null}
  -- DodoPayments Webhook Database Schema
  -- Compatible with PostgreSQL (Supabase, Neon, etc.)

  -- Enable UUID extension (if not already enabled)
  CREATE EXTENSION IF NOT EXISTS "uuid-ossp";

  -- Customers table
  CREATE TABLE IF NOT EXISTS customers (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    email TEXT NOT NULL,
    name TEXT NOT NULL,
    dodo_customer_id TEXT UNIQUE NOT NULL,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
  );

  -- Subscriptions table
  CREATE TABLE IF NOT EXISTS subscriptions (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    customer_id UUID NOT NULL REFERENCES customers(id) ON DELETE CASCADE,
    dodo_subscription_id TEXT UNIQUE NOT NULL,
    product_id TEXT NOT NULL,
    status TEXT NOT NULL CHECK (status IN ('pending', 'active', 'on_hold', 'cancelled', 'failed', 'expired')),
    billing_interval TEXT NOT NULL CHECK (billing_interval IN ('day', 'week', 'month', 'year')),
    amount INTEGER NOT NULL,
    currency TEXT NOT NULL,
    next_billing_date TIMESTAMP WITH TIME ZONE NOT NULL,
    cancelled_at TIMESTAMP WITH TIME ZONE,
    created_at TIMESTAMP WITH TIME ZONE NOT NULL,
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
  );

  -- Webhook events log
  CREATE TABLE IF NOT EXISTS webhook_events (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    webhook_id TEXT UNIQUE,
    event_type TEXT NOT NULL,
    data JSONB NOT NULL,
    processed BOOLEAN DEFAULT FALSE,
    error_message TEXT,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    processed_at TIMESTAMP WITH TIME ZONE,
    attempts INTEGER DEFAULT 0
  );

  -- Indexes for better query performance
  CREATE INDEX IF NOT EXISTS idx_customers_email ON customers(email);
  CREATE INDEX IF NOT EXISTS idx_customers_dodo_id ON customers(dodo_customer_id);
  CREATE INDEX IF NOT EXISTS idx_subscriptions_dodo_id ON subscriptions(dodo_subscription_id);
  CREATE INDEX IF NOT EXISTS idx_subscriptions_customer_id ON subscriptions(customer_id);
  CREATE INDEX IF NOT EXISTS idx_subscriptions_status ON subscriptions(status);
  CREATE INDEX IF NOT EXISTS idx_webhook_events_processed ON webhook_events(processed, created_at);
  CREATE INDEX IF NOT EXISTS idx_webhook_events_type ON webhook_events(event_type);
  CREATE INDEX IF NOT EXISTS idx_webhook_events_created_at ON webhook_events(created_at DESC);
  CREATE INDEX IF NOT EXISTS idx_webhook_events_webhook_id ON webhook_events(webhook_id);

  -- Function to automatically update updated_at timestamp
  CREATE OR REPLACE FUNCTION update_updated_at_column()
  RETURNS TRIGGER AS $$
  BEGIN
    NEW.updated_at = NOW();
    RETURN NEW;
  END;
  $$ LANGUAGE plpgsql;

  -- Triggers to automatically update updated_at
  CREATE TRIGGER update_customers_updated_at
    BEFORE UPDATE ON customers
    FOR EACH ROW
    EXECUTE FUNCTION update_updated_at_column();

  CREATE TRIGGER update_subscriptions_updated_at
    BEFORE UPDATE ON subscriptions
    FOR EACH ROW
    EXECUTE FUNCTION update_updated_at_column();

  -- Comments for documentation
  COMMENT ON TABLE customers IS 'Stores customer information from DodoPayments';
  COMMENT ON TABLE subscriptions IS 'Stores subscription data from DodoPayments';
  COMMENT ON TABLE webhook_events IS 'Logs all incoming webhook events for audit and retry purposes';

  COMMENT ON COLUMN customers.dodo_customer_id IS 'Unique customer ID from DodoPayments';
  COMMENT ON COLUMN subscriptions.dodo_subscription_id IS 'Unique subscription ID from DodoPayments';
  COMMENT ON COLUMN subscriptions.amount IS 'Amount in smallest currency unit (e.g., cents)';
  COMMENT ON COLUMN subscriptions.currency IS 'Currency used for the subscription payments (e.g., USD, EUR, INR)';
  COMMENT ON COLUMN webhook_events.attempts IS 'Number of processing attempts for failed webhooks';
  COMMENT ON COLUMN webhook_events.data IS 'Full webhook payload as JSON';
  ```
</CodeGroup>

**Tables created:**

* **customers** - Email, name, dodo\_customer\_id
* **subscriptions** - Status, amount, next\_billing\_date, linked to customers
* **webhook\_events** - Event log with webhook\_id for idempotency

## Implementation Code

<CodeGroup>
  ```typescript functions/webhook/index.ts expandable theme={null}
  import { serve } from 'https://deno.land/std@0.208.0/http/server.ts';
  import { createClient, SupabaseClient } from 'https://esm.sh/@supabase/supabase-js@2.38.4';
  import { DodoPayments } from 'https://esm.sh/dodopayments@2.4.1';

  export const corsHeaders = {
    'Access-Control-Allow-Origin': '*',
    'Access-Control-Allow-Headers': 'authorization, x-client-info, apikey, content-type, webhook-id, webhook-signature, webhook-timestamp',
    'Access-Control-Allow-Methods': 'POST, OPTIONS',
  };

  interface WebhookPayload {
    business_id: string;
    type: string;
    timestamp: string;
    data: {
      payload_type:
        | "Payment"
        | "Subscription"
        | "Refund"
        | "Dispute"
        | "LicenseKey"
        | "CreditLedgerEntry"
        | "CreditBalanceLow"
        | "AbandonedCheckout"
        | "DunningAttempt"
        | "EntitlementGrant";
      subscription_id: string;
      customer: {
        customer_id: string;
        email: string;
        name: string;
      };
      product_id: string;
      status: string;
      recurring_pre_tax_amount: number;
      payment_frequency_interval: string;
      created_at: string;
      next_billing_date: string;
      cancelled_at?: string | null;
      currency: string;
    };
  }

  // Handle subscription events
  async function handleSubscriptionEvent(supabase: SupabaseClient, payload: WebhookPayload, status: string) {
    if (!payload.data.customer.customer_id || !payload.data.subscription_id) {
      throw new Error('Missing required fields: customer_id or subscription_id');
    }

    try {
      console.log('🔄 Processing subscription event:', JSON.stringify(payload, null, 2));
      
      const customer = payload.data.customer;
      
      // Upsert customer (create if doesn't exist, otherwise update)
      const customerResult = await supabase
        .from('customers')
        .upsert({
          email: customer.email,
          name: customer.name,
          dodo_customer_id: customer.customer_id
        }, {
          onConflict: 'dodo_customer_id',
          ignoreDuplicates: false
        })
        .select('id')
        .single();

      if (customerResult.error) {
        console.error('❌ Failed to upsert customer:', customerResult.error);
        throw new Error(`Failed to upsert customer: ${customerResult.error.message}`);
      }

      const customerId = customerResult.data.id;
      console.log(`✅ Customer upserted with ID: ${customerId}`);

      // Upsert subscription
      const subscriptionResult = await supabase
        .from('subscriptions')
        .upsert({
          customer_id: customerId,
          dodo_subscription_id: payload.data.subscription_id,
          product_id: payload.data.product_id,
          status,
          billing_interval: payload.data.payment_frequency_interval.toLowerCase(),
          amount: payload.data.recurring_pre_tax_amount,
          currency: payload.data.currency,
          created_at: payload.data.created_at,
          next_billing_date: payload.data.next_billing_date,
          cancelled_at: payload.data.cancelled_at ?? null,
          updated_at: new Date().toISOString()
        }, {
          onConflict: 'dodo_subscription_id',
          ignoreDuplicates: false
        })
        .select();

      if (subscriptionResult.error) {
        console.error('❌ Failed to upsert subscription:', subscriptionResult.error);
        throw new Error(`Failed to upsert subscription: ${subscriptionResult.error.message}`);
      }

      console.log(`✅ Subscription upserted with ${status} status`);

    } catch (error) {
      console.error('❌ Error in handleSubscriptionEvent:', error);
      console.error('❌ Raw webhook data:', JSON.stringify(payload, null, 2));
      throw error;
    }
  }

  serve(async (req: Request) => {
    if (req.method === 'OPTIONS') {
      return new Response('ok', { headers: corsHeaders });
    }

    // Validate required environment variables
    try {
      const supabaseUrl = Deno.env.get('SUPABASE_URL');
      const supabaseServiceKey = Deno.env.get('SUPABASE_SERVICE_ROLE_KEY');
      
      if (!supabaseUrl || !supabaseServiceKey) {
        console.error('❌ Missing required environment variables');
        return new Response(
          JSON.stringify({ error: 'Server configuration error' }),
          { status: 500, headers: { ...corsHeaders, 'Content-Type': 'application/json' } }
        );
      }

      const rawBody = await req.text();
      console.log('📨 Webhook received');

      const apiKey = Deno.env.get('DODO_PAYMENTS_API_KEY');
      const webhookKey = Deno.env.get('DODO_PAYMENTS_WEBHOOK_KEY');

      if (!apiKey) {
        console.error('❌ DODO_PAYMENTS_API_KEY is not configured');
        return new Response(
          JSON.stringify({ error: 'API key not configured' }),
          { status: 500, headers: { ...corsHeaders, 'Content-Type': 'application/json' } }
        );
      }

      if (!webhookKey) {
        console.error('❌ DODO_PAYMENTS_WEBHOOK_KEY is not configured');
        return new Response(
          JSON.stringify({ error: 'Webhook verification key not configured' }),
          { status: 500, headers: { ...corsHeaders, 'Content-Type': 'application/json' } }
        );
      }

      // Verify webhook signature (required for security)
      const webhookHeaders = {
        'webhook-id': req.headers.get('webhook-id') || '',
        'webhook-signature': req.headers.get('webhook-signature') || '',
        'webhook-timestamp': req.headers.get('webhook-timestamp') || '',
      };

      try {
        const dodoPaymentsClient = new DodoPayments({
          bearerToken: apiKey,
          webhookKey: webhookKey,
        });
        const unwrappedWebhook = dodoPaymentsClient.webhooks.unwrap(rawBody, { headers: webhookHeaders });
        console.log('Unwrapped webhook:', unwrappedWebhook);
        console.log('✅ Webhook signature verified');
      } catch (error) {
        console.error('❌ Webhook verification failed:', error);
        return new Response(
          JSON.stringify({ 
            error: 'Webhook verification failed',
            details: error instanceof Error ? error.message : 'Invalid signature'
          }),
          { status: 401, headers: { ...corsHeaders, 'Content-Type': 'application/json' } }
        );
      }

      // Initialize Supabase client
      const supabase = createClient(supabaseUrl, supabaseServiceKey);

      let payload: WebhookPayload;
      try {
        payload = JSON.parse(rawBody) as WebhookPayload;
      } catch (parseError) {
        console.error('❌ Failed to parse webhook payload:', parseError);
        return new Response(
          JSON.stringify({ error: 'Invalid JSON payload' }),
          { status: 400, headers: { ...corsHeaders, 'Content-Type': 'application/json' } }
        );
      }

      const eventType = payload.type;
      const eventData = payload.data;
      const webhookId = req.headers.get('webhook-id') || '';

      console.log(`📋 Webhook payload:`, JSON.stringify(payload, null, 2));

      // Check for duplicate webhook-id (idempotency)
      if (webhookId) {
        const { data: existingEvent } = await supabase
          .from('webhook_events')
          .select('id')
          .eq('webhook_id', webhookId)
          .single();

        if (existingEvent) {
          console.log(`⚠️ Webhook ${webhookId} already processed, skipping (idempotency)`);
          return new Response(
            JSON.stringify({ success: true, message: 'Webhook already processed' }),
            { status: 200, headers: { ...corsHeaders, 'Content-Type': 'application/json' } }
          );
        }
      }

      // Log webhook event with webhook_id for idempotency
      const logResult = await supabase.from('webhook_events').insert([{
        webhook_id: webhookId || null,
        event_type: eventType,
        data: eventData,
        processed: false,
        created_at: new Date().toISOString()
      }]).select('id').single();

      if (logResult.error) {
        console.error('❌ Failed to log webhook event:', logResult.error);
        return new Response(
          JSON.stringify({ error: 'Failed to log webhook event' }),
          { status: 500, headers: { ...corsHeaders, 'Content-Type': 'application/json' } }
        );
      }

      const loggedEventId = logResult.data.id;
      console.log('📝 Webhook event logged with ID:', loggedEventId);

      console.log(`🔄 Processing: ${eventType} (${eventData.payload_type || 'unknown payload type'})`);

      try {
        switch (eventType) {
          case 'subscription.active':
            await handleSubscriptionEvent(supabase, payload, 'active');
            break;
          case 'subscription.cancelled':
            await handleSubscriptionEvent(supabase, payload, 'cancelled');
            break;
          case 'subscription.renewed':
            console.log('🔄 Subscription renewed - keeping active status and updating billing date');
            await handleSubscriptionEvent(supabase, payload, 'active');
            break;
          default:
            console.log(`ℹ️ Event ${eventType} logged but not processed (no handler available)`);
        }
        
        const updateResult = await supabase
          .from('webhook_events')
          .update({ 
            processed: true, 
            processed_at: new Date().toISOString() 
          })
          .eq('id', loggedEventId);
        
        if (updateResult.error) {
          console.error('❌ Failed to mark webhook as processed:', updateResult.error);
        } else {
          console.log('✅ Webhook marked as processed');
        }
      } catch (processingError) {
        console.error('❌ Error processing webhook event:', processingError);
        
        await supabase
          .from('webhook_events')
          .update({ 
            processed: false,
            error_message: processingError instanceof Error ? processingError.message : 'Unknown error',
            processed_at: new Date().toISOString()
          })
          .eq('id', loggedEventId);
        
        throw processingError;
      }

      console.log('✅ Webhook processed successfully');

      return new Response(
        JSON.stringify({ 
          success: true, 
          event_type: eventType,
          event_id: loggedEventId
        }),
        { status: 200, headers: { ...corsHeaders, 'Content-Type': 'application/json' } }
      );

    } catch (error) {
      console.error('❌ Webhook processing failed:', error);
      return new Response(
        JSON.stringify({ 
          error: 'Webhook processing failed',
          details: error instanceof Error ? error.message : 'Unknown error'
        }),
        { status: 500, headers: { ...corsHeaders, 'Content-Type': 'application/json' } }
      );
    }
  });
  ```
</CodeGroup>

## How It Works

The Deno-based Edge Function:

1. **Verifies signature** - Uses dodopayments library for HMAC-SHA256 verification
2. **Checks idempotency** - Looks up webhook ID to prevent duplicate processing
3. **Logs the event** - Stores raw webhook data in `webhook_events` table
4. **Processes updates** - Creates or updates customers and subscriptions via Supabase client
5. **Handles errors** - Logs failures and marks event for retry

## Testing

**Local development:**

```bash theme={null}
cd supabase
npm run dev
# Available at http://localhost:54321/functions/v1/webhook
```

<Note>
  The `--no-verify-jwt` flag is required because webhooks don't include JWT tokens. Security is provided by webhook signature verification.
</Note>

**View logs:**

```bash theme={null}
npx supabase functions logs webhook
```

Or in [Supabase Dashboard](https://supabase.com/dashboard) → Edge Functions → webhook → Logs tab

**Configure in DodoPayments Dashboard:**

1. Go to Developers → Webhooks
2. Add endpoint with your Supabase URL
3. Enable: subscription.active, subscription.cancelled, subscription.renewed

## Common Issues

| Issue                     | Solution                                                 |
| ------------------------- | -------------------------------------------------------- |
| Verification failed       | Check webhook key is correct from DodoPayments dashboard |
| Database permission error | Ensure using Service Role Key                            |
| JWT verification error    | Deploy with `--no-verify-jwt` flag                       |
| Function not found        | Verify project ref is correct and function is deployed   |

## Resources

* [Supabase Edge Functions Docs](https://supabase.com/docs/guides/functions)
* [Supabase CLI](https://supabase.com/docs/reference/cli)
* [Deno Runtime](https://deno.land/)
* [Webhook Events Guide](/developer-resources/webhooks/intents/webhook-events-guide)
* [GitHub Repo](https://github.com/dodopayments/cloud-functions/tree/main/supabase)