ایا این کد استاندارد هست

سلام یک سئوالی دارم من این کد نوشتم ایا استاندارت هستش یانه مشکلی نداره لطفا راهنمایی کنید
@hesammousavi
@endworld
@samanzdev

<?php

namespace App\Http\Controllers\Cart;

use App\Http\Controllers\Controller;
use App\Models\Address;
use App\Models\Discount;
use App\Models\Order;
use App\Models\Product;
use App\Models\ShoppingCart;
use Illuminate\Http\Request;
use Shetabit\Multipay\Exceptions\InvalidPaymentException;
use Shetabit\Multipay\Invoice;
use Shetabit\Payment\Facade\Payment;

class PaymentController extends Controller
{
    function getPrice(Product $product)
    {
        $price = null;
        if (($discount = $product->price->discount) !== null) {
            $price = $discount;
        } else {
            $price = $product->price->value;
        }
        return $price;
    }

    public function payment(Request $request)
    {
        $shoppingCart = ShoppingCart::where('user_id', auth()->user()->id)->with('product')->get();

        if (isset($shoppingCart)) {
            if ($request->address_id != null) {
                $address = Address::where('id', $request->address_id)->first();
            }

            $order = $this->firstOrCreateOrder($shoppingCart, $request, $address, $request->resnumber);
        }

        $invoice = (new Invoice)->amount($this->sum($shoppingCart, $request->couponText));
        $Uuid = $invoice->getUuid();
        $payment = Payment::callbackUrl('http://127.0.0.1:8000/products/checkout/callback?resnumber=' . $Uuid)
            ->purchase($invoice,
                function ($driver, $transactionId) use ($order, $invoice, $shoppingCart, $Uuid) {
                    $order->where('id', $order->id)->update([
                        'resnumber' => $Uuid
                    ]);
                    foreach ($shoppingCart as $cart) {
                        $cart->delete();
                    }
                })->pay()->toJson();
        $payment = json_decode($payment);
        return response([
            'isSuccess' => true,
            'message' => 'لطفا شکیبا باشید درحال انتقال به بانک هستید',
            'payment' => "{$payment->action}"
        ]);
    }

    private function sum($shoppingCart, $couponText)
    {
        $sum = null;
        foreach ($shoppingCart as $cart) {
            $sum = $sum + ($this->getPrice($cart->product) * $cart['quantity']);
        }

        if ($couponText != null) {
            $discount = Discount::where('code', $couponText)->first();
            if ($discount != null) {
                $sum = (($sum * (100 - $discount->percent)) / 100);
            }
        }
        return $sum;
    }

    public function paymentCallback(Request $request)
    {
        $order = Order::where('resnumber', $request->resnumber)->firstOrFail();
        try {
            $payment = Payment::amount($order->total_price)->transactionId($request->Authority)->verify();
            $order->update([
                'status' => 'paid'
            ]);
            return response([
                'isSuccess' => true,
                'message' => 'خرید شما با موفقیت پرداخت شده ',
            ]);
        } catch (InvalidPaymentException  $e) {
            return response([
                'isSuccess' => false,
                'message' => $e->getMessage(),
            ]);
        }

    }

    /**
     * @param $shoppingCart
     * @param Request $request
     * @param $address
     * @return Order|\Illuminate\Database\Eloquent\Model
     */
    private function firstOrCreateOrder($shoppingCart, Request $request, $address, $resnumber = null)
    {
        $orderItems = $shoppingCart->mapWithKeys(function ($cart) {
            return [$cart['product']->id => ['quantity' => $cart['quantity']]];
        });

        if ($resnumber != null) {
            $order = Order::where('resnumber', $resnumber)->first();
        } else {
            $order = Order::create([
                'user_id' => auth()->user()->id,
                'delivery' => $request->delivery_method,
                'payment_method' => $request->selected_payment_method,
                'address_id' => $address ? $address->id : null,
                'discount_code' => $request->couponText,
                'total_price' => $this->sum($shoppingCart, $request->couponText),
                'status' => 'unpaid',
            ]);
        }

        $order->products()->attach($orderItems);
        return $order;
    }
}