ChannelType.php

См. документацию.

<?php
 
namespace Bitrix\MessageService\Providers\Edna\Constants;
 
class ChannelType
{
    public const WHATSAPP = 'WHATSAPP';
    public const SMS = 'SMS';
    public const VIBER = 'VIBER';
 
    public static function getAllTypeList(): array
    {
        return [
            self::WHATSAPP,
            self::SMS,
            self::VIBER,
        ];
    }
}