portal-api/app/Models/ServiceSslCertificate.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class ServiceSslCertificate extends Model
{
    public const MAX_ENTRIES = 30;

    public const MAX_FILE_BYTES = 524288;

    protected $guarded = [];

    protected $casts = ['data' => 'encrypted:array'];

    public function service()
    {
        return $this->belongsTo(Service::class);
    }

    public static function emptyData(): array
    {
        return ['fields' => [], 'files' => []];
    }
}