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plugins/stPayNowPlugin/vendor/pay-now/paynow-php-sdk/README.md

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+# Paynow PHP SDK
+
+[![Latest Version](https://img.shields.io/github/release/pay-now/paynow-php-sdk.svg?style=flat-square)](https://github.com/pay-now/paynow-php-sdk/releases)
+[![Build Status](https://travis-ci.org/pay-now/paynow-php-sdk.svg?branch=master)](https://travis-ci.org/pay-now/paynow-php-sdk)
+[![Software License](https://img.shields.io/badge/license-MIT-brightgreen.svg?style=flat-square)](LICENSE)
+<!--[![Total Downloads](https://img.shields.io/packagist/dt/pay-now/paynow-php-sdk.svg?style=flat-square)](https://packagist.org/packages/pay-now/paynow-php-sdk)-->
+
+Paynow PHP Library provides access to Paynow API from Applications written in PHP language. 
+
+## Installation
+
+### Composer
+Install the library using [Composer](https://getcomposer.org)
+```bash
+$ composer require pay-now/paynow-php-sdk
+```
+and include composer autoloader
+```php
+require_once('vendor/autoload.php');
+```
+
+## Usage
+Making a payment
+```php
+$client = new \Paynow\Client('TestApiKey', 'TestSignatureKey', Environment::SANDBOX);
+$orderReference = "success_1234567";
+$idempotencyKey = uniqid($orderReference . '_');
+
+$paymentData = [
+    "amount" => "100",
+    "currency" => "PLN",
+    "externalId" => $orderReference,
+    "description" => "Payment description",
+    "buyer" => [
+        "email" => "customer@domain.com"
+    ]
+];
+
+try {
+    $payment = new \Paynow\Service\Payment($client);
+    $result = $payment->authorize($paymentData, $idempotencyKey);
+} catch (PaynowException $exception) {
+    // catch errors
+}
+```
+
+Handling notification with current payment status
+```php
+$payload = trim(file_get_contents('php://input'));
+$headers = getallheaders();
+$notificationData = json_decode($payload, true);
+
+try {
+    new \Paynow\Notification('TestSignatureKey', $payload, $headers);
+    // process notification with $notificationData
+} catch (\Exception $exception) {
+    header('HTTP/1.1 400 Bad Request', true, 400);
+}
+
+header('HTTP/1.1 202 Accepted', true, 202);
+```
+
+## Documentation
+See the [Paynow API documentation](https://docs.paynow.pl)
+
+## Support
+If you have any questions or issues, please contact our support at support@paynow.pl.
+
+## License
+MIT license. For more information see the [LICENSE file](LICENSE)