portal/app/Http/Resources/ReceiptDetailResource.php

<?php

namespace App\Http\Resources;

use Illuminate\Http\Resources\Json\JsonResource;

class ReceiptDetailResource extends JsonResource
{
    /**
     * Transform the resource into an array.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return array
     */
    public function toArray($request)
    {
        
        return [
            'id' => $this->id,
            'trans_type1' => $this->trans_type1,
            'trans_type2' => $this->trans_type2,
            'transaction_id' => (int) $this->transaction_id,
            'receipt_id' => (int)$this->receipt_id,
            'price' => (double) $this->price,
            'amount' => (double) $this->amount
            
        ];
    }
}