How to Apply Discount/Coupon Code on Checkout in Laravel Cashier for Paddle?

[rexludus]

Hi,

I'm using Laravel Cashier for Paddle to handle one-time payments, and I want to apply a discount code during the checkout process. I noticed that the previewPrices method allows me to see the price with discounts applied, but when I proceed with checkout, the discount is not applied and the full amount is charged.

Here's my current implementation:

Route::get('/buy', function (Request $request) {
    $checkout = $request->user()->checkout('pri_xxx',)
        ->withCoupon('dsc_xxx') // Trying to apply discount code
        ->returnTo(route('orders'));

    return view('buy', ['checkout' => $checkout]);
})->middleware(['auth', 'verified'])->name('buy');

The withCoupon method doesn't seem to work as expected here. The checkout process ignores the discount, and the full price is charged instead.

I have checked the Paddle documentation, and I'm aware that discounts can be passed through their API. However, I am unsure how to achieve this directly within Laravel Cashier’s checkout flow. Could you please provide guidance on how to apply a discount or coupon code during checkout with Laravel Cashier for Paddle?

Thanks in advance for your help!