shipping-portal/app/Http/Resources/InvoiceResource.php

<?php

namespace App\Http\Resources;

use Illuminate\Http\Resources\Json\JsonResource;

class InvoiceResource extends JsonResource
{
    /**
     * Transform the resource into an array.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return array|\Illuminate\Contracts\Support\Arrayable|\JsonSerializable
     */
    public function toArray($request)
    {
        return [
            'invoice_id' => $this->reference,
            'carrier_tracking_number' => '1zbr06tw403742920',
            'this_package_was_delivered' => '1zbr06tw403742920',
            'due_date' => '11.04.2021',
            'date_paid' => '21.01.2021',
            'outstanding' => 92.01


        ];
    }
}