Courier Guy Shopify Integration for South African Stores.

# Save your key as a Wrangler secret
wrangler secret put COURIER_GUY_API_KEY
wrangler secret put COURIER_GUY_ACCOUNT_NO

const res = await fetch('https://api.thecourierguy.co.za/v1/waybills', {
  method: 'POST',
  headers: {
    'Authorization': `Bearer ${env.COURIER_GUY_API_KEY}`,
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    account_number: env.COURIER_GUY_ACCOUNT_NO,
    service_type: 'OVN',
    collection: { suburb: 'Cape Farms', postcode: '7441' },
    delivery: {
      name: order.shipping_address.name,
      street: order.shipping_address.address1,
      suburb: order.shipping_address.city,
      province: order.shipping_address.province,
      postcode: order.shipping_address.zip,
      phone: order.shipping_address.phone,
    },
    parcels: [{ length: 30, width: 20, height: 10, weight: 1.5 }],
    reference: order.name,
  }),
});
const { waybill_number, label_url } = await res.json();

// Shopify CarrierService callback payload
export async function rateCallback(req) {
  const { rate } = await req.json();
  const totalWeight = rate.items.reduce((w, i) => w + i.grams * i.quantity, 0);
  try {
    const rates = await getCourierGuyRates({
      to_postcode: rate.destination.postal_code,
      to_suburb: rate.destination.city,
      weight_kg: totalWeight / 1000,
    });
    return Response.json({ rates });
  } catch {
    // Fallback so checkout does not stall
    return Response.json({
      rates: [{ service_name: 'Courier Guy Overnight', total_price: '12900', currency: 'ZAR' }],
    });
  }
}