Overview

Use the getSubscriptionPaymentInformation method to retrieve information related to the payment made for a subscription.

Parameters

Response

Response sample

{
    "Type": "CC",
    "Currency": "USD",
    "PaymentMethod": {
        "FirstDigits": "4111",
        "LastDigits": "1111",
        "ExpirationMonth": null,
        "ExpirationYear": null,
        "CardUpdated": false,
        "Authorize3DSUrl": null,
        "CardType": "Visa"
    }
}

Request

<?php
require ('PATH_TO_AUTH');

$subscriptionReference = "YOUR_SUBSCRIPTION_REFERENCE";

try {
    $paymentInformation = $client->getSubscriptionPaymentInformation($sessionID, $subscriptionReference);
} catch (SoapFault $e) {
    echo  $e->getMessage();
}
var_dump($paymentInformation);

Overview

Starting with 2Checkout API 5.0, search methods are including the option of pagination. Pagination has been developed for decreasing the request loading time, while allowing you to better handle the returning responses.

How it works?

Pagination works on all the search methods existing on 2Checkout API 5.0. The default pagination behavior is to display page 1 with 10 results. The maximum number of items displayed on a single page is 200.

Parameters

To use pagination, include the Pagination object inside the search method call, using the parameters below:

Response

The response of search methods that are including pagination will contain a new object, with the following parameters:

Sample request

The below PHP sample includes a search method for subscriptions.

<?php

require('PATH_TO_AUTH');

$SubscriptionSearch = new stdClass();
$SubscriptionSearch->CustomerEmail  = 'email@avangate.com';
$SubscriptionSearch->DeliveredCode = null;
$SubscriptionSearch->AvangateCustomerReference = null;
$SubscriptionSearch->ExternalCustomerReference = null;
$SubscriptionSearch->Aggregate = false;
$SubscriptionSearch->SubscriptionEnabled = null; //true false null
$SubscriptionSearch->RecurringEnabled = null; // true - autorenewal, false - manual renewal, null = both(default)
$SubscriptionSearch->ProductCodes = null; //array('Product_Code1', 'Product_Code2');
$SubscriptionSearch->CountryCodes = null;//array ('au')
$SubscriptionSearch->PurchasedAfter = null;
$SubscriptionSearch->PurchasedBefore = null;
$SubscriptionSearch->ExpireAfter = null;
$SubscriptionSearch->ExpireBefore = null;
$SubscriptionSearch->LifetimeSubscription = null;
$SubscriptionSearch->Type = 'regular'; //'trial', 'regular', 'regularfromtrial'
$SubscriptionSearch->TestSubscription = null; // true, false, null = both(default)
$SubscriptionSearch->Pagination = new stdClass();
$SubscriptionSearch->Pagination->Page = 1; // set the number of pages for the response
$SubscriptionSearch->Pagination->Limit = 200; // set the limit for the values from the response

$jsonRpcRequest = array (
'method' => 'searchSubscriptions',
'params' => array($sessionID, $SubscriptionSearch),
'id' => $i++,
'jsonrpc' => '2.0');

var_dump (callRPC((Object)$jsonRpcRequest, $host, true));

Overview

Use this object to create, update and retrieve additional information fields from your subscriptions.

Attributes

Overview

Use the setSubscriptionCustomer method. Avangate moves subscription under the customer for which you provide the Avangate customer reference or the External customer reference during the subscription update process.

Requirements

To move a subscription from a source customer to a target customer:

• Use Avangate customer references or External customer references belonging to the target customer. Avangate re-assigns the subscription to the target customer. 
• Customer references must be valid and associated to the target customer entity under which you move the subscription.
• If you provide both the Avangate customer reference and External customer reference they need to belong to the same target customer entity.

Parameters

Response

Request

<?php
$host   = "https://api.avangate.com";
$client = new SoapClient($host . "/soap/4.0/?wsdl", array(
    'location' => $host . "/soap/4.0/",
    "stream_context" => stream_context_create(array(
        'ssl' => array(
            'verify_peer' => false,
            'verify_peer_name' => false
        )
    ))
));

function hmac($key, $data)
{
    $b = 64; // byte length for md5
    if (strlen($key) > $b) {
        $key = pack("H*", md5($key));
    }
    
    $key    = str_pad($key, $b, chr(0x00));
    $ipad   = str_pad('', $b, chr(0x36));
    $opad   = str_pad('', $b, chr(0x5c));
    $k_ipad = $key ^ $ipad;
    $k_opad = $key ^ $opad;
    return md5($k_opad . pack("H*", md5($k_ipad . $data)));
}
$merchantCode = "YOUR_MERCHANT_CODE";// your account's merchant code available in the 'System settings' area of the cPanel: https://secure.avangate.com/cpanel/account_settings.php
$key = "YOUR_SECRET_KEY";// your account's secret key available in the 'System settings' area of the cPanel: https://secure.avangate.com/cpanel/account_settings.php
$now          = gmdate('Y-m-d H:i:s'); //date_default_timezone_set('UTC')
$string = strlen($merchantCode) . $merchantCode . strlen($now) . $now;
$hash   = hmac($key, $string);
try {
    $sessionID = $client->login($merchantCode, $now, $hash);
}
catch (SoapFault $e) {
    echo "Authentication: " . $e->getMessage();
    exit;
}
$subscriptionReference = '30E47F8699';
$customerReference = 220531648;
try {
    $newCustomerInfo = $client->setSubscriptionCustomer($sessionID, $subscriptionReference, $customerReference);
}
catch (SoapFault $e) {
    echo "newCustomerInfo: " . $e->getMessage();
    exit;
}
var_dump("newCustomerInfo", $newCustomerInfo);

Overview

Avangate supports 1-click manual subscription renewals for returning customers who paid for their previous orders with Credit/Debit cards.

In this scenario, you can facilitate subscription renewals for subscribers who opted out of auto-renewal (recurring billing).

How does this work? 

1. Identify returning customers. 
2. Generate the manual renewal link.
3. Create a tokenized manual subscription renewal link and serve it to the returning customer.
4. Customers using the link land on a hosted shopping cart, then chose a credit card they previously used for purchases from your account/store and place the order.

Availability

Please contact Avangate to start using one-click (1-click) subscription renewals.

Requirements 

• Make sure that the subscription is eligible:
  • Status needs to be Active or Past Due
  • Subscriptions cannot be evergreen​
• The email address must match that of the initial order. If shoppers change the email they need to re-enter the payment details.

Flow comparison

Detailed 1-click subscription renewal flow

Identify returning customers

You particularly need either the Avangate customer reference or the external customer reference you control.

Use customer information

Use subscription information

Create the manual renewal link

Attach the payment token to the manual renewal link

Example

<?php
$host   = "https://api.avangate.com";
$client = new SoapClient($host . "/soap/3.0/?wsdl", array(
    'location' => $host . "/soap/3.0/",
    "stream_context" => stream_context_create(array(
        'ssl' => array(
            'verify_peer' => false,
            'verify_peer_name' => false
        )
    ))
));
function hmac($key, $data)
{
    $b = 64; // byte length for md5
    if (strlen($key) > $b) {
        $key = pack("H*", md5($key));
    }
    
    $key    = str_pad($key, $b, chr(0x00));
    $ipad   = str_pad('', $b, chr(0x36));
    $opad   = str_pad('', $b, chr(0x5c));
    $k_ipad = $key ^ $ipad;
    $k_opad = $key ^ $opad;
    return md5($k_opad . pack("H*", md5($k_ipad . $data)));
}
$merchantCode = "YOUR_MERCHANT_CODE";// your account's merchant code available in the 'System settings' area of the cPanel: https://secure.avangate.com/cpanel/account_settings.php
$key = "YOUR_SECRET_KEY";// your account's secret key available in the 'System settings' area of the cPanel: https://secure.avangate.com/cpanel/account_settings.php
$now          = date('Y-m-d H:i:s'); //date_default_timezone_set('UTC')
$string = strlen($merchantCode) . $merchantCode . strlen($now) . $now;
$hash   = hmac($key, $string);
try {
    $sessionID = $client->login($merchantCode, $now, $hash);
}
catch (SoapFault $e) {
    echo "Authentication: " . $e->getMessage();
    exit;
}
 
var_dump($sessionID);
$SubscriptionSearch = new stdClass();
$SubscriptionSearch->CustomerEmail  = null;
$SubscriptionSearch->DeliveredCode = '___TEST___CODE____123';
$SubscriptionSearch->AvangateCustomerReference = '123456789';
$SubscriptionSearch->ExternalCustomerReference = null;
$SubscriptionSearch->Aggregate = false;
$SubscriptionSearch->SubscriptionEnabled = null; //true false null
$SubscriptionSearch->RecurringEnabled = null; // true - autorenewal, false - manual renewal, null = both(default) 
$SubscriptionSearch->ProductCodes = null; //array('Product_Code1', 'Product_Code2');
$SubscriptionSearch->CountryCodes = null;//array ('au')
$SubscriptionSearch->PurchasedAfter = null;
$SubscriptionSearch->PurchasedBefore = null;
$SubscriptionSearch->ExpireAfter = null;
$SubscriptionSearch->ExpireBefore = null;
$SubscriptionSearch->RenewedAfter = null;
$SubscriptionSearch->RenewedBefore = null;
$SubscriptionSearch->NotificationAfter = null;
$SubscriptionSearch->NotificationBefore = null;
$SubscriptionSearch->LifetimeSubscription = null;
$SubscriptionSearch->Type = 'regular'; //'trial', 'regular', 'regularfromtrial'
$SubscriptionSearch->TestSubscription = null; // true, false, null = both(default) 
$SubscriptionSearch->Page = 1;
$SubscriptionSearch->Limit = 10;
try {
    $allsubscriptions = $client->searchSubscriptions($sessionID, $SubscriptionSearch);
}
catch (SoapFault $e) {
    echo "allsubscriptions: " . $e->getMessage();
    exit;
}
var_dump("allsubscriptions", $allsubscriptions);
$subscriptionReference = $allsubscriptions[0]->SubscriptionReference;
 
try {
    $manualrenewallink = $client->getRenewalDetails($sessionID, $subscriptionReference);
}
catch (SoapFault $e) {
    echo "manualrenewallink: " . $e->getMessage();
    exit;
}
var_dump("manualrenewallink", $manualrenewallink);

$IdCustomer = $allsubscriptions[0]->AvangateCustomerReference;
$CustomerType = 'AvangateCustomerReference';
$Url = $manualrenewallink->ManualRenewalLink;
$ValidityTime = 10;
$ValidationIp = null;
try {
    $ssoLINK = $client->getSingleSignOnInCart($sessionID, $IdCustomer, $CustomerType, $Url, $ValidityTime, $ValidationIp);
}
catch (SoapFault $e) {
    echo "ssoLINK: " . $e->getMessage();
    exit;
}
var_dump("ssoLINK", $ssoLINK);

Overview

Use the getProposalVersion method via JSON-RPC API 6.0 to retrieve a specific proposal version.

Request Parameters

Request Sample

<?php
declare(strict_types=1);

class Configuration
{
    public const MERCHANT_CODE = '';
    public const MERCHANT_KEY = '';
    public const URL = 'http://api.2checkout.com/rpc/6.0';
    public const ACTION = 'getProposalVersion';
    public const ADDITIONAL_OPTIONS = null;
    //array or JSON
    public const PAYLOAD = [
        "7ee02473-b60a-415b-90ae-87c6c443f684",
        3
    ];
}

class Client
{
    private const LOGIN_METHOD = 'login';
    private $calls = 1;
    private $sessionId;


    private function generateAuth(): array
    {
        $merchantCode = Configuration::MERCHANT_CODE;
        $key = Configuration::MERCHANT_KEY;
        $date = gmdate('Y-m-d H:i:s');
        $string = strlen($merchantCode) . $merchantCode . strlen($date) . $date;
        $hash = hash_hmac('md5', $string, $key);

        return compact('merchantCode', 'date', 'hash');
    }


    public function login(string $url)
    {
        $payload = $this->generateAuth();
        $response = $this->call($url, array_values($payload), self::LOGIN_METHOD);
        $this->sessionId = $response['result'];
    }


    public function call(
        string $url = Configuration::URL,
        $payload = Configuration::PAYLOAD,
        string $action = Configuration::ACTION
    ): ?array {
        if (empty($this->sessionId) && $action !== self::LOGIN_METHOD) {
            $this->login($url);
        }
        if(is_string($payload)) {
            $payload = json_decode($payload, true);
        }
        if (!empty($this->sessionId)) {
            $payload = [$this->sessionId, $payload[0], $payload[1]];
        }
        $payload = array_filter($payload);

        $request = json_encode([
            'jsonrpc' => '2.0',
            'method' => $action,
            'params' => $payload,
            'id' => $this->calls++,
        ]);
        $curl = curl_init($url);
        curl_setopt($curl, CURLOPT_POST, 1);
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, 0);
        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 0);
        curl_setopt($curl, CURLOPT_SSLVERSION, 0);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($curl, CURLOPT_HTTPHEADER, array('Content-Type: application/json', 'Accept: application/json', 'Cookie: XDEBUG_SESSION=PHPSTORM'));
        curl_setopt($curl, CURLOPT_POSTFIELDS, $request);
        $response = curl_exec($curl);
        if(empty($response)) {
            die('Server unavailable');
        }
        echo $response . '</br>';
        return json_decode($response, true);;
    }
}
$client = new Client();
$result = $client->call();
var_dump($result);

Response

The getProposalVersion call via JSON-RPC API 6.0 returns the Proposal object.

Overview

Use the createCustomer method to add the details of a customer entity into the 2Checkout system. By default, customer status is Inactive until you assign a specific subscription to the customer. Following that action, customer status reflects the status of the attached subscription(s).

Parameters

Response

Request

<?php
$host   = "https://api.2checkout.com";
$client = new SoapClient($host . "/soap/4.0/?wsdl", array(
    'location' => $host . "/soap/4.0/",
    "stream_context" => stream_context_create(array(
        'ssl' => array(
            'verify_peer' => false,
            'verify_peer_name' => false
        )
    ))
));

function hmac($key, $data)
{
    $b = 64; // byte length for md5
    if (strlen($key) > $b) {
        $key = pack("H*", md5($key));
    }
    
    $key    = str_pad($key, $b, chr(0x00));
    $ipad   = str_pad('', $b, chr(0x36));
    $opad   = str_pad('', $b, chr(0x5c));
    $k_ipad = $key ^ $ipad;
    $k_opad = $key ^ $opad;
    return md5($k_opad . pack("H*", md5($k_ipad . $data)));
}
$merchantCode = "YOUR_MERCHANT_CODE";// your account's merchant code available in the 'System settings' area of the cPanel: https://secure.2checkout.com/cpanel/account_settings.php
$key = "YOUR_SECRET_KEY";// your account's secret key available in the 'System settings' area of the cPanel: https://secure.2checkout.com/cpanel/account_settings.php
$now          = gmdate('Y-m-d H:i:s'); //date_default_timezone_set('UTC')
$string = strlen($merchantCode) . $merchantCode . strlen($now) . $now;
$hash   = hmac($key, $string);
try {
    $sessionID = $client->login($merchantCode, $now, $hash);
}
catch (SoapFault $e) {
    echo "Authentication: " . $e->getMessage();
    exit;
}
$newCustomer = new stdClass();
$newCustomer->2CheckoutCustomerReference = null;
$newCustomer->ExternalCustomerReference = 'ThisIsATestReference123456';
$newCustomer->FirstName = 'NewCustomer';
$newCustomer->LastName = 'NewCustomerLastName';
$newCustomer->Company = null;
$newCustomer->FiscalCode = null;
$newCustomer->Address1 = 'Address';
$newCustomer->Address2 = null;
$newCustomer->City = 'LA';
$newCustomer->Zip = '90210';
$newCustomer->CountryCode = 'us';
$newCustomer->Phone = null;
$newCustomer->Fax = null;
$newCustomer->Email = 'newcustomer@email.com';
$newCustomer->ExistingCards = null;
$newCustomer->Enabled = null;
$newCustomer->Trial = null;
$newCustomer->Language = 'en';
try {
    $newCustomerInfo = $client->createCustomer($sessionID, $newCustomer);
}
catch (SoapFault $e) {
    echo "newCustomerInfo: " . $e->getMessage();
    exit;
}
var_dump("newCustomerInfo", $newCustomerInfo);

Overview

Place an order with dynamic product information, and collect the payment using PayPal.

Parameters

Workflow

1. Create the order object. Use PAYPAL as the type of the PaymentDetails object and send the shopper email and a return URL as part of the PaymentMethod object. Place the order.
2. Once you place the order, Avangate logs it into the system. At this point in time, the status of the order is PENDING. Avangate responds with the Order information object.
3. Redirect shoppers to the RedirectURL from the Order information object you receive as response from Avangate.
4. Once shoppers log into their PayPal account and complete the transaction, they're redirected to the ReturnURL you set in the order object. Avangate also authorizes the order and updates the status to AUTHRECEIVED. 

Response

Request 

<?php

require ('PATH_TO_AUTH');

$Order = new stdClass();
$Order->Currency = "EUR";
$Order->Language = "EN";
$Order->Country = "NL";
$Order->CustomerIP = '91.220.121.21';//"10.10.13.37";
$Order->Source = "sourceAPI.net";
$Order->LocalTime = date('Y-m-d H:i:s');
$Order->CustomerReference = 421820775;
$Order->Items = array();

/**
 * 1st Product
 */
$Order->Items[0] = new stdClass();
$Order->Items[0]->Code = null;
$Order->Items[0]->Quantity = 2;
$Order->Items[0]->PurchaseType = 'PRODUCT';
$Order->Items[0]->Tangible = true; // physical
$Order->Items[0]->IsDynamic = true;

$Order->Items[0]->Price = new stdClass();
$Order->Items[0]->Price->Amount = 100;
$Order->Items[0]->Price->Type = 'CUSTOM';

$Order->Items[0]->Name = 'Dynamic Product 1 '. date("Y-m-d H:i:s");
$Order->Items[0]->Description = 'Description Produs OTF';

$Order->Items[0]->PriceOptions = [];
$priceOption = new stdClass();
$priceOption->Name = 'Name';
$priceOption->Value = 'Value';
$priceOption->Surcharge = 10;
$Order->Items[0]->PriceOptions[] = $priceOption;

$priceOption1 = new stdClass();
$priceOption1->Name = 'Name';
$priceOption1->Value = 'Value123';
$priceOption1->Surcharge = 11;
$Order->Items[0]->PriceOptions[] = $priceOption1;

$priceOption2 = new stdClass();
$priceOption2->Name = 'Name1';
$priceOption2->Value = 'Value1';
$priceOption2->Surcharge = 12;
$Order->Items[0]->PriceOptions[] = $priceOption2;

$Order->Items[0]->RecurringOptions = new stdClass();
$Order->Items[0]->RecurringOptions->CycleLength = 1;
$Order->Items[0]->RecurringOptions->CycleUnit = 'MONTH';
$Order->Items[0]->RecurringOptions->CycleAmount = 1234;
$Order->Items[0]->RecurringOptions->ContractLength = 3;
$Order->Items[0]->RecurringOptions->ContractUnit = 'YEaR';


/**
 * 3rd Product - SHIPPING
 */
$Order->Items[2] = new stdClass();
$Order->Items[2]->Name = 'Shipping Item '. date("Y-m-d H:i:s");
$Order->Items[2]->PurchaseType = 'SHIPPING';
$Order->Items[2]->Quantity = 1;
$Order->Items[2]->Price = new stdClass();
$Order->Items[2]->Price->Amount = 123;
$Order->Items[2]->IsDynamic = true;

/**
 * 4th Product - TAX
 */
$Order->Items[3] = new stdClass();
$Order->Items[3]->Name = 'Tax Item '. date("Y-m-d H:i:s");
$Order->Items[3]->PurchaseType = 'TAX';
$Order->Items[3]->Quantity = 1;
$Order->Items[3]->Price = new stdClass();
$Order->Items[3]->Price->Amount = 456;
$Order->Items[3]->IsDynamic = true;
$Order->Items[3]->RecurringOptions = new stdClass();
$Order->Items[3]->RecurringOptions->CycleLength = 1;
$Order->Items[3]->RecurringOptions->CycleUnit = 'MONTH';
$Order->Items[3]->RecurringOptions->CycleAmount = 10.2;
$Order->Items[3]->RecurringOptions->ContractLength = 3;
$Order->Items[3]->RecurringOptions->ContractUnit = 'YEaR';

/**
 * 5th Product - COUPON
 */
$Order->Items[4] = new stdClass();
$Order->Items[4]->Name = 'Coupon Item '. date("Y-m-d H:i:s");
$Order->Items[4]->PurchaseType = 'COUPON';
$Order->Items[4]->Quantity = 1;
$Order->Items[4]->Price = new stdClass();
$Order->Items[4]->Price->Amount = 234;
$Order->Items[4]->IsDynamic = true;

/**/
$additionalField1 = new stdClass();
$additionalField1->Code = "additional_field_order_1";
$additionalField1->Text = "REST";
$additionalField1->Value = "1";

$additionalField2 = new stdClass();
$additionalField2->Code = "additional_field_order_2";
$additionalField2->Text = "REST";
$additionalField2->Value = "a";

$additionalField3 = new stdClass();
$additionalField3->Code = "additional_field_order_3";
$additionalField3->Text = "REST";
$additionalField3->Value = "a";

$Order->AdditionalFields = array();
$Order->AdditionalFields[0] = $additionalField1;
$Order->AdditionalFields[1] = $additionalField2;
$Order->AdditionalFields[2] = $additionalField3;

$additionalField1 = new stdClass();
$additionalField1->Code = "REST";
$additionalField1->Text = "REST";
$additionalField1->Value = "REST";



$Order->MachineId = 'machineIdTestDan';
$Order->Discount = null;
$Order->ExternalReference = null;

$Order->BillingDetails = new stdClass();
$Order->BillingDetails->Address1 = 'Address 1';
$Order->BillingDetails->Address2 = 'Address 2';
$Order->BillingDetails->City = 'Billing City';
$Order->BillingDetails->State = 'Billing State';
$Order->BillingDetails->CountryCode = 'NL';
$Order->BillingDetails->Phone = US;
$Order->BillingDetails->Email = 'shopper@avangate.com';
$Order->BillingDetails->FirstName = 'John';
$Order->BillingDetails->LastName = 'Doe';
$Order->BillingDetails->Company = 'Billing Company';
$Order->BillingDetails->Zip = '12345';


/**/
$Order->DeliveryDetails = new stdClass();
$Order->DeliveryDetails->Address1 = 'Address 1';
$Order->DeliveryDetails->Address2 = 'Address 2';
$Order->DeliveryDetails->City = 'Billing City';
$Order->DeliveryDetails->State = 'Billing State';
$Order->DeliveryDetails->CountryCode = 'US';
$Order->DeliveryDetails->Phone = '12345';
$Order->DeliveryDetails->Email = 'customer@email.com';
$Order->DeliveryDetails->FirstName = 'John';
$Order->DeliveryDetails->LastName = 'Doe';
$Order->DeliveryDetails->Zip = 12345;
/**/

$Order->PaymentDetails = new stdClass ();
$Order->PaymentDetails->Type = 'PAYPAL';
$Order->PaymentDetails->Currency = 'usd';
$Order->PaymentDetails->PaymentMethod = new stdClass ();
$Order->PaymentDetails->CustomerIP = '91.220.121.21';
$Order->PaymentDetails->PaymentMethod->ReturnURL = 'http://yoururl.com';
$Order->PaymentDetails->PaymentMethod->Email= 'email@avangate.com';

$Order->AdditionalFields = NULL;
$Order->LocalTime = NULL;
$Order->GiftDetails = NULL;

try {
    $newOrder = $client->placeOrder($sessionID, $Order);
}
catch (SoapFault $e) {
    echo "newOrder: " . $e->getMessage();
    exit;
}

var_dump("newOrder", $newOrder);

Overview

Use the addPromotionSources method to define new sources for an existing promotion.

Parameters

Response

Request

<?php

require ('PATH_TO_AUTH');

// Promotion code corresponding to the promotion you want to add sources to
$promotionCode = '';

// Sources array with the source values 
$sources = ['source1', 'source2'];

$jsonRpcRequest = array (
'jsonrpc' => '2.0',
'id' => $i++,
'method' => 'addPromotionSources',
'params' => array($sessionID, $promotionCode, $sources)
);
var_dump (callRPC($jsonRpcRequest, $host));

Overview

Use setPromotionDiscount via SOAP API 4.0 to set a fixed promotion discount.

Parameters

Response

Request

<?php 

class Client
{
    protected static $merchantCode;
    protected static $loginDate;
    protected static $hash;
    protected static $baseUrl;
    protected static $callCount = 0;
    protected static $sessionId = '';

    protected static $client;

    public static function setCredentials($code, $key)
    {
        static::$merchantCode = $code;
        static::$loginDate = gmdate('Y-m-d H:i:s');
        static::$hash = hash_hmac('md5', strlen($code) . $code . strlen(static::$loginDate) . static::$loginDate, $key);
        static::$sessionId = static::login();
    }

    public static function setBaseUrl($url)
    {
        static::$baseUrl = $url;
    }

    public static function login()
    {
        $client = static::getClient();
        return $client->login(static::$merchantCode, static::$loginDate, static::$hash);
    }

    public static function __callStatic($name, $arguments = array())
    {
        $client = static::getClient();

        array_unshift($arguments, static::$sessionId);
        $response = call_user_func_array(array($client, $name), $arguments);

        return $response;
    }

    protected static function getClient()
    {
        $opts = array(
            'http'=> ['user_agent' => 'PHPSoapClient'],
            'ssl' => [
                'verify_peer' => false,
                'verify_peer_name' => false,
            ],
        );

        if (null === static::$client) {
            static::$client = new \SoapClient(static::$baseUrl . '?wsdl', [
                'location' => static::$baseUrl,
                'cache_wsdl' => WSDL_CACHE_NONE,
                'stream_context' => stream_context_create($opts),
            ]);
        }

        return static::$client;
    }
}

Client::setBaseUrl('https://api.avangate.com/soap/3.1/');
Client::setCredentials('YOUR_MERCHANT_CODE', 'YOUR_SECRET_KEY');
Client::login();

// define first discount
$value1 = new stdClass;
$value1->Currency = 'USD';
$value1->Amount = 20.5;

// define second discount
$value2 = new stdClass;
$value2->Currency = 'EUR';
$value2->Amount = 18.8;

// create final discount object, with the values added above
$discountObj = new stdClass;
$discountObj->Type = 'FIXED';
$discountObj->DefaultCurrency = 'USD';
$discountObj->Values = [$value1, $value2];

$promotionCode = 'YOUR_PROMO_CODE'; // code of the promotion that you want to update
$response = Client::setPromotionDiscount($promotionCode,$discountObj); // Set the promotion discount to the existing promotion
var_dump($response);