Handling Stripe Webhooks

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// Follow this setup guide to integrate the Deno language server with your editor:
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// https://deno.land/manual/getting_started/setup_your_environment
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// This enables autocomplete, go to definition, etc.
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// Import via bare specifier thanks to the import_map.json file.
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import Stripe from 'https://esm.sh/stripe@14?target=denonext'
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const stripe = new Stripe(Deno.env.get('STRIPE_API_KEY') as string, {
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  // This is needed to use the Fetch API rather than relying on the Node http
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  // package.
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  apiVersion: '2024-11-20'
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})
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// This is needed in order to use the Web Crypto API in Deno.
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const cryptoProvider = Stripe.createSubtleCryptoProvider()
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console.log('Hello from Stripe Webhook!')
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Deno.serve(async (request) => {
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  const signature = request.headers.get('Stripe-Signature')
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  // First step is to verify the event. The .text() method must be used as the
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  // verification relies on the raw request body rather than the parsed JSON.
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  const body = await request.text()
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  let receivedEvent
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  try {
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    receivedEvent = await stripe.webhooks.constructEventAsync(
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      body,
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      signature!,
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      Deno.env.get('STRIPE_WEBHOOK_SIGNING_SECRET')!,
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      undefined,
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      cryptoProvider
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    )
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  } catch (err) {
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    return new Response(err.message, { status: 400 })
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  }
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  console.log(`🔔 Event received: ${receivedEvent.id}`)
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  return new Response(JSON.stringify({ ok: true }), { status: 200 })
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});