Handle Stripe webhooks with a Deno edge function

import Stripe from 'npm:stripe'
import { createClient } from 'npm:@supabase/supabase-js@2'
const stripe = new Stripe(Deno.env.get('STRIPE_SECRET_KEY')!)
const admin = createClient(Deno.env.get('PROJECT_URL')!, Deno.env.get('SERVICE_KEY')!)

Deno.serve(async (req) => {
  const body = await req.text()
  const event = await stripe.webhooks.constructEventAsync(
    body, req.headers.get('stripe-signature')!, Deno.env.get('STRIPE_WEBHOOK_SECRET')!)
  if (event.type === 'checkout.session.completed') {
    await admin.from('orders').update({ paid: true })
      .eq('checkout_id', event.data.object.id)
  }
  return new Response('ok')
})