Transactional email and custom auth delivery for Supabase with low-latency magic link dispatch

import { serve } from 'https://deno.land/std@0.168.0/http/server.ts';

const SADASEND_API_KEY = Deno.env.get('SADASEND_API_KEY');

serve(async (req) => {
  const { to, subject, html } = await req.json();

  const res = await fetch('https://api.sadasend.com/emails', {
    method: 'POST',
    headers: {
      'Authorization': `Bearer ${SADASEND_API_KEY}`,
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({
      from: 'Auth <auth@yourdomain.com>',
      to,
      subject,
      html,
    }),
  });

  const data = await res.json();
  return new Response(JSON.stringify(data), {
    headers: { 'Content-Type': 'application/json' },
    status: res.status,
  });
});