Retrieve partner subscription renewal price

Parameters

Request

<?php
declare(strict_types=1);
class Configuration
{
    public const MERCHANT_CODE = 'MALWARQO';
    public const MERCHANT_KEY = 'SECRET_KEY';
    public const URL = 'http://api.avangate.local/soap/6.0';
    public const ACTION = 'getPartnerSubscriptionsRenewalPrice';
    
    public const PAYLOAD =  <<<JSON
{
    "Items": [
        {
            "SubscriptionReference": "GW3OPY94Q6",
            "Quantity": 5,
            "PricingOptions": [
                {
                    "Code": "option30p"
                },
                {
                    "Code": "option20p"
                }
            ]
        }
    ],
    "ExtraDiscount": {
        "Value": 10,
        "Type": "FIXED"
    },
    "ExtraMargin": {
        "Value": 10,
        "Type": "PERCENT"
    }
}
JSON;
 
}
class Client
{
    public function call(
        string $url = Configuration::URL,
        $payload = Configuration::PAYLOAD,
        string $action = Configuration::ACTION
    ): ?object {
        if (is_array($payload)) {
            $payload = json_encode($payload);
        }
        if (!empty($payload)) {
            // SoapClient works with objects(StdClass)
            $payload = json_decode($payload);
        }
        $soapClient = $this->getClient($url);
        $sessionId = $this->getSession($soapClient);
        $args = array_filter([$sessionId, $payload]);
        return $soapClient->$action(...$args);
    }
 
    public function getClient(string $url): SoapClient
    {
        return new SoapClient(
            $url.'?wsdl',
            [
                'location' => $url,
                'cache_wsdl' => WSDL_CACHE_NONE,
            ]
        );
    }
 
    public function getSession(SoapClient $client)
    {
        $date = gmdate('Y-m-d H:i:s');
        $merchantCode = Configuration::MERCHANT_CODE;
        $key = Configuration::MERCHANT_KEY;
        $string = strlen($merchantCode).$merchantCode.strlen($date).$date;
        $algo = 'sha256';
        $hash = hash_hmac($algo, $string, $key);
        $client->__setCookie('XDEBUG_SESSION', 'PHPSTORM');
        return $client->login($merchantCode, $date, $hash, $algo);
    }
}
try {
    $client = new Client();
    var_dump($client->call());
} catch (Exception $ex) {
    var_dump($ex);
}