$req = [
        "REQUEST_HEADER" => [
            "SESSION_ID" => $sid,
            "COMPRESSED" => "N"
        ],
        'RECEIVER'=>[
                'vkn'=>$this->dbFatura->alvkn,
                'alias'=>$this->eFaturaPk,
        ],
        'INVOICE'=>[
            'CONTENT'=>base64_encode($this->faturaData),
        ],
];
 
$send = $c->SendInvoice($req)