The engineering behind the interface

SELECT o.id, o.status, c.name
  FROM orders o
  JOIN customers c ON c.id = o.customer_id
 WHERE o.created_at >= current_date
 ORDER BY o.created_at DESC
 LIMIT 25 OFFSET 0;

-- money is exact, never float
amount   numeric(19,4) NOT NULL,
currency char(3)       NOT NULL,
fx_rate  numeric(18,8) NOT NULL,

Route::middleware(['auth:jwt', 'role:sales'])
    ->post('/orders', ConfirmOrder::class);

DB::transaction(function () use ($order) {
    $this->stock->reserve($order->lines);
    $order->confirm();
});
event(new OrderConfirmed($order->id));

POST /webhooks/payments
Idempotency-Key: 7f3c9a2e-...
-> 200 (already processed)