Virtual Currency

The Virtual Currency module allows developers to sell in-game currencies in a comprehensive way. The module has various integration options and allows game developers to:

  • Sell packages and arbitrary quantities of in-game currencies,
  • Use multi-currency support,
  • Use custom images and promo labels,
  • Run marketing campaigns,
  • Manage in-game currency user balances,
  • Auto-detect user currency and country.

Integration Guide

To integrate the module:

  1. Register an Xsolla Publisher Account.
  2. Create a new project.
  3. Set up the module.
  4. Get a token.
  5. Set up the opening of the store UI.
  6. Set up webhook handling.
  7. Test the payment process.
  8. Launch the module and sign the agreement.

The following parameters are required for the integration:

  • Merchant ID — shown in the Publisher Account URL: https://publisher.xsolla.com/{merchant_id}/.
  • API Key — generated in Publisher Account > Settings > Company.
  • Project ID — shown in the Publisher Account URL when viewing project settings: https://publisher.xsolla.com/{merchant_id}/projects/{project_id}/.
  • Project secret key — generated in project settings.

Creating a Project

  1. Go to Projects and click Create new project.
  2. In set up mode:
    a. Specify the webhook URL.
    b. Generate a secret key to sign project webhooks.
    c. Turn on the Virtual Currency module.

Setting Up the Module

  1. Go to Virtual Currency module settings and configure the following parameters for the in-game currency:
    • Name.
    • Price per unit.
    • Image.
  2. Go to the Packages tab and click Add a package. Specify the following parameters:
    • Price.
    • Image.
  3. To enable or disable the package in the store, set Active to On or Off, respectively.

Get Token to Open Store

To integrate the store UI into your game, you will need an access token. An access token is a string that identifies the game, user and purchase parameters.

Xsolla API uses HTTP Basic Authentication. Provide your Merchant ID as the basic auth username and the API key as your password.

Set the value to "mode":"sandbox" to test the payment process.

Token endpoint URL:

https://api.xsolla.com/merchant/merchants/{merchant_id}/token

In an HTTP POST request, you can use parameters for store UI. Request and response payloads are formatted as JSON.

Example Request

Below you can find sample code of how to get a token in PHP with the help of Xsolla PHP SDK. If you're using another programming language, please take a look at the CURL example by clicking on the CURL tab.

PHP
CURL
<?php

use Xsolla\SDK\API\XsollaClient;
use Xsolla\SDK\API\PaymentUI\TokenRequest;

$tokenRequest = new TokenRequest($projectId, $userId);
$tokenRequest->setUserEmail('email@example.com')
    ->setExternalPaymentId('12345')
    ->setSandboxMode(true)
    ->setUserName('USER_NAME')
    ->setCustomParameters(array('key1' => 'value1', 'key2' => 'value2'));

$xsollaClient = XsollaClient::factory(array(
    'merchant_id' => MERCHANT_ID,
    'api_key' => API_KEY
));
$token = $xsollaClient->createPaymentUITokenFromRequest($tokenRequest);
    curl -v https://api.xsolla.com/merchant/merchants/{merchant_id}/token \
    -X POST \
    -u your_merchant_id:merchant_api_key \
    -H 'Content-Type:application/json' \
    -H 'Accept: application/json' \
    -d '
    {
        "user": {
            "id": {
                "value": "1234567"
            },
            "email": {
                "value": "email@example.com"
            }
        },
        "settings": {
            "project_id": 14004,
            "mode": "sandbox"
        }
    }'

You can find the full list of parameters in the API Reference.

Opening the Store UI

There are three ways of opening a store:

  • Use the Pay Station Embed script.
  • New window.
  • Iframe.

To open the store in sandbox mode, use the following URL: https://sandbox-secure.xsolla.com/.

Pay Station Embed

The Pay Station Embed script determines the type of device and opens the store UI in a lightbox (on desktop screens) or in a new window (on mobile and tablet screens). We recommend using asynchronous script loading.

Asynchronous script loading example:

 <script>
     var options = {
         access_token: 'ACCESS_TOKEN', //TODO use access token, received on previous step
         sandbox: true //TODO please do not forget to remove this setting when going live
     };
     var s = document.createElement('script');
     s.type = "text/javascript";
     s.async = true;
     s.src = "https://static.xsolla.com/embed/paystation/1.0.7/widget.min.js";
     s.addEventListener('load', function (e) {
         XPayStationWidget.init(options);
     }, false);
     var head = document.getElementsByTagName('head')[0];
     head.appendChild(s);
 </script>

<button data-xpaystation-widget-open>Buy Credits</button>

You can find the full list of parameters in the API Reference.

New Window

To open the store UI in a new window, use the following link: https://secure.xsolla.com/paystation2/?access_token=ACCESS_TOKEN, where ACCESS_TOKEN is the token obtained in the previous step.

Iframe

To open the store UI in an iframe, you must implement the following mechanisms on your side:

  • Specify the device type (desktop vs mobile) and send it within the token’s settings.ui.version parameter;
  • Receiving events from the payment UI via postMessage.

To open the store UI in a new window, use the following link: https://secure.xsolla.com/paystation2/?access_token=ACCESS_TOKEN, where ACCESS_TOKEN is the token obtained in the previous step.

Setting up Webhooks

Xsolla sends the following webhooks to your project:

  • User Validation
  • Payment
  • Refund

To acknowledge that you received webhook notifications without any problem, your server should return a 204 HTTP status code without body. The full description of webhook mechanism with samples is described in detail in the API Reference.

Creating a Signature

To create a signature:

  1. Concatenate the data sent in the Xsolla server’s request and the project’s secret key (generated in project settings).
  2. Hash the string using the SHA1 algorithm.
  3. Send the signature in the Signature header.

When handling a webhook, make sure that the signature received matches the one set in the Signature header.

User Validation

The Xsolla server sends a request to the project’s webhook URL to verify that a user exists in the game.

Request example

PHP
CURL
$request = array(
    'notification_type' => 'user_validation',
    'user' => array(
        'ip' => '127.0.0.1',
        'phone' => '18777976552',
        'email'=> 'email@example.com',
        'id'=> '1234567',
        'country' => 'US'
    )
)
curl -v https://example.com/ \
-X POST \
-H 'Content-Type:application/json' \
-H 'Accept: application/json' \
-H 'Authorization: Signature 13342703ccaca5064ad33ba451d800c5e823db8f' \
-d '
{
    "notification_type": "user_validation",
    "user": {
        "ip": "127.0.0.1",
        "phone": "18777976552",
        "email": "email@example.com",
        "id": "1234567",
        "country": "US"
    }
}'

You can find the full list of parameters in the API Reference.

Payment

The Xsolla server sends a webhook including payment details whenever a user completes a payment.

Request example

PHP
CURL
$request = array(
    'notification_type' => 'payment',
    'purchase' => array(
        'virtual_items' => array(
            'items' => array(
                0 => array(
                    'sku' => 'test_item1',
                    'amount' => 1,
                    ),
                1 => array(
                    'sku' => 'test_item2',
                    'amount' => 1,
                    ),
                2 => array(
                    'sku' => 'test_item3',
                    'amount' => 1,
                    ),
            )
        ),
        'total' => array(
            'currency' => 'USD',
            'amount' => 9.99
        )
    ),
    'user' => array(
        'ip' => '127.0.0.1',
        'phone' => '18777976552',
        'email' => 'email@example.com',
        'id' => '1234567',
        'country' => 'US'
    ),
    'transaction' => array(
        'id' => 87654321,
        'payment_date' => '2014-09-23T19:25:25+04:00',
        'payment_method' => 1380,
        'dry_run' => 1
    ),
    'payment_details' => array(
        'payment' => array(
            'currency' => 'USD',
            'amount' => 9.99
        ),
        'vat' => array(
            'currency' => 'USD',
            'amount' => 0
        ),
        'payout_currency_rate' => 1,
        'payout' => array(
            'currency' => 'USD',
            'amount' => 9.49
        ),
        'xsolla_fee' => array(
            'currency' => 'USD',
            'amount' => 0.19
        ),
        'payment_method_fee' => array(
            'currency' => 'USD',
            'amount' => 0.31
        )
    )
)
curl -v https://example.com/ \
-X POST \
-H 'Content-Type:application/json' \
-H 'Accept: application/json' \
-H 'Authorization: Signature 13342703ccaca5064ad33ba451d800c5e823db8f' \
-d '
{
    "notification_type": "payment",
    "purchase": {
        "virtual_items": {
            "items": [
                {
                    "sku": "test_item1",
                    "amount": 1
                },
                {
                    "sku": "test_item2",
                    "amount": 1
                },
                {
                    "sku": "test_item3",
                    "amount": 2
                },
            ]
        },
        "total": {
            "currency": "USD",
            "amount": 9.99
        }
    },
    "user": {
        "ip": "127.0.0.1",
        "phone": "18777976552",
        "email": "email@example.com",
        "id": "1234567",
        "country": "US"
    },
    "transaction": {
        "id": 87654321,
        "payment_date": "2014-09-23T19:25:25+04:00",
        "payment_method": 1380,
        "dry_run": 1
    },
    "payment_details": {
        "payment": {
            "currency": "USD",
            "amount": 9.99
        },
        "vat": {
            "currency": "USD",
            "amount": 0
        },
        "payout_currency_rate": 1,
        "payout": {
            "currency": "USD",
            "amount": 9.49
        },
        "xsolla_fee": {
            "currency": "USD",
            "amount": 0.19
        },
        "payment_method_fee": {
            "currency": "USD",
            "amount": 0.31
        }
    }
}'

You can find the full list of parameters in the API Reference.

Refund

If the user cancels the payment, the Xsolla server sends a webhook notification with information about the payment.

Request example

PHP
CURL
$request = array(
    'notification_type' => 'refund',
    'purchase' => array(
        'virtual_currency' => array(
            'name' => 'Coins',
            'quantity' => 100,
            'currency' => 'USD',
            'amount' => 9.99
        ),
        'total' => array(
            'currency' => 'USD',
            'amount' => 9.99
        )
    ),
    'user' => array(
        'ip' => '127.0.0.1',
        'phone' => '18777976552',
        'email' => 'email@example.com',
        'id' => '1234567',
        'country' => 'US'
    ),
    'transaction' => array(
        'id' => 87654321,
        'payment_date' => '2014-09-23T19:25:25+04:00',
        'payment_method' => 1380,
        'dry_run' => 1
    ),
    'refund_details' => (
            'code' => 1,
            'reason' => 'Fraud'
    ),
    'payment_details' => array(
        'payment' => array(
            'currency' => 'USD',
            'amount' => 9.99
        ),
        'vat' => array(
            'currency' => 'USD',
            'amount' => 0
        ),
        'payout_currency_rate' => 1,
        'payout' => array(
            'currency' => 'USD',
            'amount' => 9.49
        ),
        'xsolla_fee' => array(
            'currency' => 'USD',
            'amount' => 0.19
        ),
        'payment_method_fee' => array(
            'currency' => 'USD',
            'amount' => 0.31
        )
    )
);
curl -v https://example.com/ \
-X POST \
-H 'Content-Type:application/json' \
-H 'Accept: application/json' \
-H 'Authorization: Signature 13342703ccaca5064ad33ba451d800c5e823db8f' \
-d '
{
    "notification_type":"refund",
    "purchase":{
        "virtual_currency":{
            "name": "Coins",
            "quantity":10,
            "currency":"USD",
            "amount":100
        },
        "subscription":{
            "plan_id": "b5dac9c8",
            "subscription_id": "10",
            "date_create": "2014-09-22T19:25:25+04:00",
            "currency": "USD",
            "amount": 9.99
        },
        "checkout":{
            "currency":"USD",
            "amount":50
        },
        "virtual_items":{
            "items":[
                {
                    "sku": "test_item1",
                    "amount":1
                }
            ],
            "currency":"USD",
            "amount":50
        },
        "total":{
            "currency":"USD",
            "amount":200
        }
    },
    "user": {
        "ip": "127.0.0.1",
        "phone": "18777976552",
        "email": "email@example.com",
        "id": "1234567",
        "name": "Xsolla User",
        "country": "US"
    },
    "transaction":{
        "id":1,
        "external_id":1,
        "dry_run":1,
        "agreement":1
    },
    "refund_details":{
        "code":1,
        "reason":"Fraud"
    },
    "payment_details":{
        "xsolla_fee":{
            "currency":"USD",
            "amount":"10"
        },
        "payout":{
            "currency":"USD",
            "amount":"200"
        },
        "payment_method_fee":{
            "currency":"USD",
            "amount":"20"
        },
        "payment":{
            "currency":"USD",
           "amount":"230"
        }
    }
}'

You can find the full list of parameters in the API Reference.

Testing Webhooks

To test the webhook handler:

  1. In the Publisher Account, open the module settings.
  2. Go to the Testing tab.
  3. Enter the test data and click Test. The Xsolla server will send all possible webhooks.
  4. The test is marked green in case of a valid response and red in case of an error.

Testing Payment Process

Xsolla Sandbox is a standalone environment that supports all features of the live environment, except real payments. You can access the Sandbox by sending "mode" = "sandbox" when getting the token.

To test a bank card payment:

  1. Open the store in sandbox mode.
  2. Choose the item to purchase.
  3. Click Credit/debit cards.
  4. Enter the bank card details and any values in the remaining fields. You can also specify incorrect details (card number, expiration date, or CVV) in order to generate an error.

List of bank cards to be used for testing

Important! Sandbox bank card payments can only be made in USD, EUR, RUB, GBP, SGD, HKD, or THB.

Launching the Module

To launch the module after its successful testing, open its settings in the Publisher Account, go to the Launch tab, and click On.

Important! Before you can accept real payments, you must:

  1. Remove "mode" = "sandbox".
  2. Sign the agreement.

Preventing Fraud Using In-Game Parameters

You can use the custom_parameters object passed in the token to send the user's in-game data and detect suspicious activity. For example, a player who spends little time in the game but has a high level may be a scammer who has created an account in order to sell it after leveling up the character using a stolen bank card.

List of available parameters

Let your account manager know what parameters you plan to pass, and the trigger values for each of them. We will use this information to configure your anti-fraud filters.

Paying Using a Selected Method

When you open the store, you can send the payment method ID in the settings.payment_method parameter. In this case, the user will be immediately redirected to the payment form of the selected payment method.

Request example

CURL
    curl -v https://api.xsolla.com/merchant/merchants/{merchant_id}/token \
    -X POST \
    -u your_merchant_id:merchant_api_key \
    -H 'Content-Type:application/json' \
    -H 'Accept: application/json' \
    -d '
    {
        "user": {
            "id": {
                "value": "1234567"
            },
        },
        "settings": {
            "project_id": 14004,
            "payment_method": 24
        }
    }'

You can get the list of payment method IDs in Publisher Account > Payment systems or using the List all payment systems API method.

Purchasing a Selected Package

When you open the store, you can send the package ID in the purchase.virtual_currency.quantity. In this case, the user is immediately redirected to the payment UI.

Request example

CURL
    curl -v https://api.xsolla.com/merchant/merchants/{merchant_id}/token \
    -X POST \
    -u your_merchant_id:merchant_api_key \
    -H 'Content-Type:application/json' \
    -H 'Accept: application/json' \
    -d '
    {
        "user": {
            "id": {
                "value": "1234567"
            },
        },
        "settings": {
            "project_id": 14004
        },
        "purchase": {
            "virtual_currency": {
                "quantity": 100
            },
        }
    }'

Managing User Balance

You can store the user balance in an in-game currency on the Xsolla side. This will allow you to:

  • Sell virtual items for the in-game currency stored in the balance (requires the Virtual Items module).
  • Refill user balances by selling in-game currency packages.
  • Change user balances via the API.

To enable the feature:

  1. Open project settings in the Publisher Account.
  2. Click Users.
  3. Set the following switches to On:
    • Store user's data in Xsolla
    • Show the user's profile in Pay Station 3.0.

Selling In-Game Currencies via Cash Kiosks

Users can purchase in-game currencies via cash kiosks after identifying themselves using their nickname, email, etc. — as per project settings. To enable the feature:

  • On the project side, enable the possibility to sell arbitrary quantities of an in-game currency and to handle webhooks with as few parameters as possible.
  • In the Publisher Account, go to project settings and set Public User ID to On.

Enabling Arbitrary Amounts of In-Game Currencies

You can allow users to purchase an arbitrary amount of an in-game currency. To enable the feature:

  • In module settings, uncheck Enable change to be given following purchase and indicate the minimum/maximum amount of the in-game currency a user can buy.
  • When opening the store, include the settings.ui.components.virtual_currency.custom_amount parameter.