sarga/packages/Webkul/Checkout/src/Database/Factories/CartFactory.php

<?php

namespace Webkul\Checkout\Database\Factories;

use Illuminate\Support\Facades\DB;
use Webkul\Customer\Models\Customer;
use Webkul\Checkout\Models\Cart;
use Webkul\Checkout\Models\CartAddress;
use Illuminate\Database\Eloquent\Factories\Factory;

class CartFactory extends Factory
{
    /**
     * The name of the factory's corresponding model.
     *
     * @var string
     */
    protected $model = Cart::class;

    /**
     * Define the model's default state.
     *
     * @return array
     */
    public function definition(): array
    {
        $now = date("Y-m-d H:i:s");

        $lastOrder = DB::table('orders')
                       ->orderBy('id', 'desc')
                       ->select('id')
                       ->first();

        $customer = Customer::factory()
                            ->create();

        return [
            'is_guest'              => 0,
            'is_active'             => 1,
            'customer_id'           => $customer->id,
            'customer_email'        => $customer->email,
            'customer_first_name'   => $customer->first_name,
            'customer_last_name'    => $customer->last_name,
            'is_gift'               => 0,
            'base_currency_code'    => 'EUR',
            'channel_currency_code' => 'EUR',
            'grand_total'           => 0.0000,
            'base_grand_total'      => 0.0000,
            'sub_total'             => 0.0000,
            'base_sub_total'        => 0.0000,
            'channel_id'            => 1,
            'created_at'            => $now,
            'updated_at'            => $now,
        ];
    }
}