[PHP]Integracja z DotPay Opcje

[trifek]

Witajcie.
Mam pytanie dotyczące parametru signature w integracji z Dotpay.

Mam taki kod:

[PHP] pobierz, plaintext 
private function generateSignature(Request $request, int $orderId, string $dotPayPrice, string $dotPayCurrency, string $dateTime, string $control, string $description, string $email, string $companyName, string $companeEmail): string
    {
        $pin = env('DOTPAY_PIN');
        $sign =
            $pin .
            env('DOTPAY_SHOP_ID') .
            //$_POST['operation_number'].
            //$_POST['operation_type'].
            'new'.
            $dotPayPrice .
            $dotPayCurrency .
            //$_POST['operation_withdrawal_amount'].
            //$_POST['operation_commission_amount'].
            //$_POST['is_completed'].
            $dotPayPrice .
            $dotPayCurrency .
            $dateTime .
            //$_POST['operation_related_number'].
            $control .
            $description .
            $email .
            $companyName .
            $companeEmail;
        //$_POST['credit_card_issuer_identification_number'].
        //$_POST['credit_card_masked_number'].
        //$_POST['credit_card_expiration_year'].
        //$_POST['credit_card_expiration_month'].
        //$_POST['credit_card_brand_codename'].
        //$_POST['credit_card_brand_code'].
        //$_POST['credit_card_unique_identifier'].
        //$_POST['credit_card_id'].
        //$_POST['channel'].
        //$_POST['channel_country'].
        //$_POST['geoip_country'];
        $signature = hash('sha256', $sign);
        return $signature;
    }
[PHP] pobierz, plaintext 

dotPayPrice = kwota transakcji, $dotPayCurrency = waluta transakcji.


Według dotpay moje signature jest źle obliczane (otrzymuję inną wartość signature zwrotną od Dotpaya).

Wie ktoś może co mam nie tak w tej funkcji?