first commit

2025-01-06 20:47:25 +01:00
commit 3bdbd78c2f
25591 changed files with 3586440 additions and 0 deletions
--- a/modules/paynow/vendor/php-http/curl-client/LICENSE
+++ b/modules/paynow/vendor/php-http/curl-client/LICENSE
@@ -0,0 +1,19 @@
+Copyright (c) 2015 PHP HTTP Team <team@php-http.org>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is furnished
+to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
--- a/modules/paynow/vendor/php-http/curl-client/composer.json
+++ b/modules/paynow/vendor/php-http/curl-client/composer.json
@@ -0,0 +1,57 @@
+{
+    "name": "php-http/curl-client",
+    "description": "PSR-18 and HTTPlug Async client with cURL",
+    "license": "MIT",
+    "keywords": [
+        "curl",
+        "http",
+        "psr-18"
+    ],
+    "homepage": "http://php-http.org",
+    "authors": [{
+        "name": "Михаил Красильников",
+        "email": "m.krasilnikov@yandex.ru"
+    }],
+    "prefer-stable": true,
+    "minimum-stability": "dev",
+    "require": {
+        "php": "^7.1 || ^8.0",
+        "ext-curl": "*",
+        "php-http/discovery": "^1.6",
+        "php-http/httplug": "^2.0",
+        "php-http/message": "^1.2",
+        "psr/http-client": "^1.0",
+        "psr/http-factory": "^1.0",
+        "symfony/options-resolver": "^3.4 || ^4.0 || ^5.0 || ^6.0"
+    },
+    "require-dev": {
+        "guzzlehttp/psr7": "^1.0",
+        "php-http/client-integration-tests": "^3.0",
+        "phpunit/phpunit": "^7.5 || ^9.4",
+        "laminas/laminas-diactoros": "^2.0"
+    },
+    "autoload": {
+        "psr-4": {
+            "Http\\Client\\Curl\\": "src/"
+        }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "Http\\Client\\Curl\\Tests\\": "tests/"
+        }
+    },
+    "provide": {
+        "php-http/client-implementation": "1.0",
+        "php-http/async-client-implementation": "1.0",
+        "psr/http-client-implementation": "1.0"
+    },
+    "scripts": {
+        "test": "vendor/bin/phpunit",
+        "test-ci": "vendor/bin/phpunit --coverage-clover build/coverage.xml"
+    },
+    "extra": {
+        "branch-alias": {
+            "dev-master": "2.x-dev"
+        }
+    }
+}
--- a/modules/paynow/vendor/php-http/curl-client/index.php
+++ b/modules/paynow/vendor/php-http/curl-client/index.php
@@ -0,0 +1,11 @@
+<?php
+
+header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
+header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
+
+header('Cache-Control: no-store, no-cache, must-revalidate');
+header('Cache-Control: post-check=0, pre-check=0', false);
+header('Pragma: no-cache');
+
+header('Location: ../');
+exit;
--- a/modules/paynow/vendor/php-http/curl-client/puli.json
+++ b/modules/paynow/vendor/php-http/curl-client/puli.json
@@ -0,0 +1,242 @@
+{
+    "version": "1.0",
+    "name": "php-http/curl-client",
+    "bindings": {
+        "98239b8b-103b-4f47-94c7-4cba49a05a1f": {
+            "_class": "Puli\\Discovery\\Binding\\ClassBinding",
+            "class": "Http\\Client\\Curl\\Client",
+            "type": "Http\\Client\\HttpAsyncClient"
+        },
+        "a6a79968-2aa5-427c-bbe1-a581d9a48321": {
+            "_class": "Puli\\Discovery\\Binding\\ClassBinding",
+            "class": "Http\\Client\\Curl\\Client",
+            "type": "Http\\Client\\HttpClient"
+        }
+    },
+    "config": {
+        "bootstrap-file": "vendor/autoload.php"
+    },
+    "packages": {
+        "clue/stream-filter": {
+            "install-path": "vendor/clue/stream-filter",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "doctrine/instantiator": {
+            "install-path": "vendor/doctrine/instantiator",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "guzzlehttp/psr7": {
+            "install-path": "vendor/guzzlehttp/psr7",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "justinrainbow/json-schema": {
+            "install-path": "vendor/justinrainbow/json-schema",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "paragonie/random_compat": {
+            "install-path": "vendor/paragonie/random_compat",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "php-http/adapter-integration-tests": {
+            "install-path": "vendor/php-http/adapter-integration-tests",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "php-http/discovery": {
+            "install-path": "vendor/php-http/discovery",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "php-http/httplug": {
+            "install-path": "vendor/php-http/httplug",
+            "installer": "composer"
+        },
+        "php-http/message": {
+            "install-path": "vendor/php-http/message",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "php-http/message-factory": {
+            "install-path": "vendor/php-http/message-factory",
+            "installer": "composer"
+        },
+        "php-http/promise": {
+            "install-path": "vendor/php-http/promise",
+            "installer": "composer"
+        },
+        "phpdocumentor/reflection-docblock": {
+            "install-path": "vendor/phpdocumentor/reflection-docblock",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "phpspec/prophecy": {
+            "install-path": "vendor/phpspec/prophecy",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "phpunit/php-code-coverage": {
+            "install-path": "vendor/phpunit/php-code-coverage",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "phpunit/php-file-iterator": {
+            "install-path": "vendor/phpunit/php-file-iterator",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "phpunit/php-text-template": {
+            "install-path": "vendor/phpunit/php-text-template",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "phpunit/php-timer": {
+            "install-path": "vendor/phpunit/php-timer",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "phpunit/php-token-stream": {
+            "install-path": "vendor/phpunit/php-token-stream",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "phpunit/phpunit": {
+            "install-path": "vendor/phpunit/phpunit",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "phpunit/phpunit-mock-objects": {
+            "install-path": "vendor/phpunit/phpunit-mock-objects",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "psr/http-message": {
+            "install-path": "vendor/psr/http-message",
+            "installer": "composer"
+        },
+        "psr/log": {
+            "install-path": "vendor/psr/log",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "puli/composer-plugin": {
+            "install-path": "vendor/puli/composer-plugin",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "puli/discovery": {
+            "install-path": "vendor/puli/discovery",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "puli/repository": {
+            "install-path": "vendor/puli/repository",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "puli/url-generator": {
+            "install-path": "vendor/puli/url-generator",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "ramsey/uuid": {
+            "install-path": "vendor/ramsey/uuid",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "sebastian/comparator": {
+            "install-path": "vendor/sebastian/comparator",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "sebastian/diff": {
+            "install-path": "vendor/sebastian/diff",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "sebastian/environment": {
+            "install-path": "vendor/sebastian/environment",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "sebastian/exporter": {
+            "install-path": "vendor/sebastian/exporter",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "sebastian/global-state": {
+            "install-path": "vendor/sebastian/global-state",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "sebastian/recursion-context": {
+            "install-path": "vendor/sebastian/recursion-context",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "sebastian/version": {
+            "install-path": "vendor/sebastian/version",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "seld/jsonlint": {
+            "install-path": "vendor/seld/jsonlint",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "symfony/filesystem": {
+            "install-path": "vendor/symfony/filesystem",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "symfony/process": {
+            "install-path": "vendor/symfony/process",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "symfony/yaml": {
+            "install-path": "vendor/symfony/yaml",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "th3n3rd/cartesian-product": {
+            "install-path": "vendor/th3n3rd/cartesian-product",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "webmozart/assert": {
+            "install-path": "vendor/webmozart/assert",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "webmozart/expression": {
+            "install-path": "vendor/webmozart/expression",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "webmozart/glob": {
+            "install-path": "vendor/webmozart/glob",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "webmozart/json": {
+            "install-path": "vendor/webmozart/json",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "webmozart/path-util": {
+            "install-path": "vendor/webmozart/path-util",
+            "installer": "composer",
+            "env": "dev"
+        },
+        "zendframework/zend-diactoros": {
+            "install-path": "vendor/zendframework/zend-diactoros",
+            "installer": "composer",
+            "env": "dev"
+        }
+    }
+}
--- a/modules/paynow/vendor/php-http/curl-client/src/Client.php
+++ b/modules/paynow/vendor/php-http/curl-client/src/Client.php
@@ -0,0 +1,398 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Http\Client\Curl;
+
+use Http\Client\Exception;
+use Http\Client\HttpAsyncClient;
+use Http\Client\HttpClient;
+use Http\Discovery\Exception\NotFoundException;
+use Http\Discovery\Psr17FactoryDiscovery;
+use Http\Promise\Promise;
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseFactoryInterface;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\StreamFactoryInterface;
+use Symfony\Component\OptionsResolver\OptionsResolver;
+
+/**
+ * PSR-18 and HTTPlug Async client based on lib-curl.
+ *
+ * @license http://opensource.org/licenses/MIT MIT
+ * @author  Михаил Красильников <m.krasilnikov@yandex.ru>
+ * @author  Blake Williams <github@shabbyrobe.org>
+ *
+ * @api
+ *
+ * @since   1.0
+ */
+class Client implements HttpClient, HttpAsyncClient
+{
+    /**
+     * cURL options.
+     *
+     * @var array
+     */
+    private $curlOptions;
+
+    /**
+     * PSR-17 response factory.
+     *
+     * @var ResponseFactoryInterface
+     */
+    private $responseFactory;
+
+    /**
+     * PSR-17 stream factory.
+     *
+     * @var StreamFactoryInterface
+     */
+    private $streamFactory;
+
+    /**
+     * cURL synchronous requests handle.
+     *
+     * @var resource|\CurlHandle|null
+     */
+    private $handle;
+
+    /**
+     * Simultaneous requests runner.
+     *
+     * @var MultiRunner|null
+     */
+    private $multiRunner;
+
+    /**
+     * Create HTTP client.
+     *
+     * @param ResponseFactoryInterface|null $responseFactory PSR-17 HTTP response factory.
+     * @param StreamFactoryInterface|null   $streamFactory   PSR-17 HTTP stream factory.
+     * @param array                         $options         cURL options
+     *                                                       {@link http://php.net/curl_setopt}.
+     *
+     * @throws NotFoundException If factory discovery failed.
+     *
+     * @since 2.0 Accepts PSR-17 factories instead of HTTPlug ones.
+     */
+    public function __construct(
+        ResponseFactoryInterface $responseFactory = null,
+        StreamFactoryInterface $streamFactory = null,
+        array $options = []
+    ) {
+        $this->responseFactory = $responseFactory ?: Psr17FactoryDiscovery::findResponseFactory();
+        $this->streamFactory = $streamFactory ?: Psr17FactoryDiscovery::findStreamFactory();
+        $resolver = new OptionsResolver();
+        $resolver->setDefaults(
+            [
+                CURLOPT_HEADER => false,
+                CURLOPT_RETURNTRANSFER => false,
+                CURLOPT_FOLLOWLOCATION => false
+            ]
+        );
+
+        // Our parsing will fail if this is set to true.
+        $resolver->setAllowedValues(
+            (string)CURLOPT_HEADER,
+            [false]
+        );
+
+        // Our parsing will fail if this is set to true.
+        $resolver->setAllowedValues(
+            (string)CURLOPT_RETURNTRANSFER,
+            [false]
+        );
+
+        // We do not know what everything curl supports and might support in the future.
+        // Make sure that we accept everything that is in the options.
+        $resolver->setDefined(array_keys($options));
+
+        $this->curlOptions = $resolver->resolve($options);
+    }
+
+    /**
+     * Release resources if still active.
+     */
+    public function __destruct()
+    {
+        if (is_resource($this->handle)) {
+            curl_close($this->handle);
+        }
+    }
+
+    /**
+     * Sends a PSR-7 request and returns a PSR-7 response.
+     *
+     * @param RequestInterface $request
+     *
+     * @return ResponseInterface
+     *
+     * @throws \InvalidArgumentException  For invalid header names or values.
+     * @throws \RuntimeException          If creating the body stream fails.
+     * @throws Exception\NetworkException In case of network problems.
+     * @throws Exception\RequestException On invalid request.
+     *
+     * @since 1.6 \UnexpectedValueException replaced with RequestException
+     * @since 1.6 Throw NetworkException on network errors
+     * @since 1.0
+     */
+    public function sendRequest(RequestInterface $request): ResponseInterface
+    {
+        $responseBuilder = $this->createResponseBuilder();
+        $requestOptions = $this->prepareRequestOptions($request, $responseBuilder);
+
+        if (is_resource($this->handle)) {
+            curl_reset($this->handle);
+        } else {
+            $this->handle = curl_init();
+        }
+
+        curl_setopt_array($this->handle, $requestOptions);
+        curl_exec($this->handle);
+
+        $errno = curl_errno($this->handle);
+        switch ($errno) {
+            case CURLE_OK:
+                // All OK, no actions needed.
+                break;
+            case CURLE_COULDNT_RESOLVE_PROXY:
+            case CURLE_COULDNT_RESOLVE_HOST:
+            case CURLE_COULDNT_CONNECT:
+            case CURLE_OPERATION_TIMEOUTED:
+            case CURLE_SSL_CONNECT_ERROR:
+                throw new Exception\NetworkException(curl_error($this->handle), $request);
+            default:
+                throw new Exception\RequestException(curl_error($this->handle), $request);
+        }
+
+        $response = $responseBuilder->getResponse();
+        $response->getBody()->seek(0);
+
+        return $response;
+    }
+
+    /**
+     * Create builder to use for building response object.
+     *
+     * @return ResponseBuilder
+     */
+    private function createResponseBuilder(): ResponseBuilder
+    {
+        $body = $this->streamFactory->createStreamFromFile('php://temp', 'w+b');
+
+        $response = $this->responseFactory
+            ->createResponse(200)
+            ->withBody($body);
+
+        return new ResponseBuilder($response);
+    }
+
+    /**
+     * Update cURL options for given request and hook in the response builder.
+     *
+     * @param RequestInterface $request         Request on which to create options.
+     * @param ResponseBuilder  $responseBuilder Builder to use for building response.
+     *
+     * @return array cURL options based on request.
+     *
+     * @throws \InvalidArgumentException  For invalid header names or values.
+     * @throws \RuntimeException          If can not read body.
+     * @throws Exception\RequestException On invalid request.
+     */
+    private function prepareRequestOptions(
+        RequestInterface $request,
+        ResponseBuilder $responseBuilder
+    ): array {
+        $curlOptions = $this->curlOptions;
+
+        try {
+            $curlOptions[CURLOPT_HTTP_VERSION]
+                = $this->getProtocolVersion($request->getProtocolVersion());
+        } catch (\UnexpectedValueException $e) {
+            throw new Exception\RequestException($e->getMessage(), $request);
+        }
+        $curlOptions[CURLOPT_URL] = (string)$request->getUri();
+
+        $curlOptions = $this->addRequestBodyOptions($request, $curlOptions);
+
+        $curlOptions[CURLOPT_HTTPHEADER] = $this->createHeaders($request, $curlOptions);
+
+        if ($request->getUri()->getUserInfo()) {
+            $curlOptions[CURLOPT_USERPWD] = $request->getUri()->getUserInfo();
+        }
+
+        $curlOptions[CURLOPT_HEADERFUNCTION] = function ($ch, $data) use ($responseBuilder) {
+            $str = trim($data);
+            if ('' !== $str) {
+                if (stripos($str, 'http/') === 0) {
+                    $responseBuilder->setStatus($str)->getResponse();
+                } else {
+                    $responseBuilder->addHeader($str);
+                }
+            }
+
+            return strlen($data);
+        };
+
+        $curlOptions[CURLOPT_WRITEFUNCTION] = function ($ch, $data) use ($responseBuilder) {
+            return $responseBuilder->getResponse()->getBody()->write($data);
+        };
+
+        return $curlOptions;
+    }
+
+    /**
+     * Return cURL constant for specified HTTP version.
+     *
+     * @param string $requestVersion HTTP version ("1.0", "1.1" or "2.0").
+     *
+     * @return int Respective CURL_HTTP_VERSION_x_x constant.
+     *
+     * @throws \UnexpectedValueException If unsupported version requested.
+     */
+    private function getProtocolVersion(string $requestVersion): int
+    {
+        switch ($requestVersion) {
+            case '1.0':
+                return CURL_HTTP_VERSION_1_0;
+            case '1.1':
+                return CURL_HTTP_VERSION_1_1;
+            case '2.0':
+                if (defined('CURL_HTTP_VERSION_2_0')) {
+                    return CURL_HTTP_VERSION_2_0;
+                }
+                throw new \UnexpectedValueException('libcurl 7.33 needed for HTTP 2.0 support');
+        }
+
+        return CURL_HTTP_VERSION_NONE;
+    }
+
+    /**
+     * Add request body related cURL options.
+     *
+     * @param RequestInterface $request     Request on which to create options.
+     * @param array            $curlOptions Options created by prepareRequestOptions().
+     *
+     * @return array cURL options based on request.
+     */
+    private function addRequestBodyOptions(RequestInterface $request, array $curlOptions): array
+    {
+        /*
+         * Some HTTP methods cannot have payload:
+         *
+         * - GET — cURL will automatically change method to PUT or POST if we set CURLOPT_UPLOAD or
+         *   CURLOPT_POSTFIELDS.
+         * - HEAD — cURL treats HEAD as GET request with a same restrictions.
+         * - TRACE — According to RFC7231: a client MUST NOT send a message body in a TRACE request.
+         */
+        if (!in_array($request->getMethod(), ['GET', 'HEAD', 'TRACE'], true)) {
+            $body = $request->getBody();
+            $bodySize = $body->getSize();
+            if ($bodySize !== 0) {
+                if ($body->isSeekable()) {
+                    $body->rewind();
+                }
+
+                // Message has non empty body.
+                if (null === $bodySize || $bodySize > 1024 * 1024) {
+                    // Avoid full loading large or unknown size body into memory
+                    $curlOptions[CURLOPT_UPLOAD] = true;
+                    if (null !== $bodySize) {
+                        $curlOptions[CURLOPT_INFILESIZE] = $bodySize;
+                    }
+                    $curlOptions[CURLOPT_READFUNCTION] = function ($ch, $fd, $length) use ($body) {
+                        return $body->read($length);
+                    };
+                } else {
+                    // Small body can be loaded into memory
+                    $curlOptions[CURLOPT_POSTFIELDS] = (string)$body;
+                }
+            }
+        }
+
+        if ($request->getMethod() === 'HEAD') {
+            // This will set HTTP method to "HEAD".
+            $curlOptions[CURLOPT_NOBODY] = true;
+        } elseif ($request->getMethod() !== 'GET') {
+            // GET is a default method. Other methods should be specified explicitly.
+            $curlOptions[CURLOPT_CUSTOMREQUEST] = $request->getMethod();
+        }
+
+        return $curlOptions;
+    }
+
+    /**
+     * Create headers array for CURLOPT_HTTPHEADER.
+     *
+     * @param RequestInterface $request     Request on which to create headers.
+     * @param array            $curlOptions Options created by prepareRequestOptions().
+     *
+     * @return string[]
+     */
+    private function createHeaders(RequestInterface $request, array $curlOptions): array
+    {
+        $curlHeaders = [];
+        $headers = $request->getHeaders();
+        foreach ($headers as $name => $values) {
+            $header = strtolower($name);
+            if ('expect' === $header) {
+                // curl-client does not support "Expect-Continue", so dropping "expect" headers
+                continue;
+            }
+            if ('content-length' === $header) {
+                if (array_key_exists(CURLOPT_POSTFIELDS, $curlOptions)) {
+                    // Small body content length can be calculated here.
+                    $values = [strlen($curlOptions[CURLOPT_POSTFIELDS])];
+                } elseif (!array_key_exists(CURLOPT_READFUNCTION, $curlOptions)) {
+                    // Else if there is no body, forcing "Content-length" to 0
+                    $values = [0];
+                }
+            }
+            foreach ($values as $value) {
+                $curlHeaders[] = $name . ': ' . $value;
+            }
+        }
+        /*
+         * curl-client does not support "Expect-Continue", but cURL adds "Expect" header by default.
+         * We can not suppress it, but we can set it to empty.
+         */
+        $curlHeaders[] = 'Expect:';
+
+        return $curlHeaders;
+    }
+
+    /**
+     * Sends a PSR-7 request in an asynchronous way.
+     *
+     * Exceptions related to processing the request are available from the returned Promise.
+     *
+     * @param RequestInterface $request
+     *
+     * @return Promise Resolves a PSR-7 Response or fails with an Http\Client\Exception.
+     *
+     * @throws \InvalidArgumentException  For invalid header names or values.
+     * @throws \RuntimeException          If creating the body stream fails.
+     * @throws Exception\RequestException On invalid request.
+     *
+     * @since 1.6 \UnexpectedValueException replaced with RequestException
+     * @since 1.0
+     */
+    public function sendAsyncRequest(RequestInterface $request)
+    {
+        if (!$this->multiRunner instanceof MultiRunner) {
+            $this->multiRunner = new MultiRunner();
+        }
+
+        $handle = curl_init();
+        $responseBuilder = $this->createResponseBuilder();
+        $requestOptions = $this->prepareRequestOptions($request, $responseBuilder);
+        curl_setopt_array($handle, $requestOptions);
+
+        $core = new PromiseCore($request, $handle, $responseBuilder);
+        $promise = new CurlPromise($core, $this->multiRunner);
+        $this->multiRunner->add($core);
+
+        return $promise;
+    }
+}
--- a/modules/paynow/vendor/php-http/curl-client/src/CurlPromise.php
+++ b/modules/paynow/vendor/php-http/curl-client/src/CurlPromise.php
@@ -0,0 +1,111 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Http\Client\Curl;
+
+use Http\Promise\Promise;
+
+/**
+ * Promise represents a response that may not be available yet, but will be resolved at some point
+ * in future. It acts like a proxy to the actual response.
+ *
+ * This interface is an extension of the promises/a+ specification https://promisesaplus.com/
+ * Value is replaced by an object where its class implement a Psr\Http\Message\RequestInterface.
+ * Reason is replaced by an object where its class implement a Http\Client\Exception.
+ *
+ * @license http://opensource.org/licenses/MIT MIT
+ * @author  Михаил Красильников <m.krasilnikov@yandex.ru>
+ */
+class CurlPromise implements Promise
+{
+    /**
+     * Shared promise core.
+     *
+     * @var PromiseCore
+     */
+    private $core;
+
+    /**
+     * Requests runner.
+     *
+     * @var MultiRunner
+     */
+    private $runner;
+
+    /**
+     * Create new promise.
+     *
+     * @param PromiseCore $core   Shared promise core
+     * @param MultiRunner $runner Simultaneous requests runner
+     */
+    public function __construct(PromiseCore $core, MultiRunner $runner)
+    {
+        $this->core = $core;
+        $this->runner = $runner;
+    }
+
+    /**
+     * Add behavior for when the promise is resolved or rejected.
+     *
+     * If you do not care about one of the cases, you can set the corresponding callable to null
+     * The callback will be called when the response or exception arrived and never more than once.
+     *
+     * @param callable $onFulfilled Called when a response will be available
+     * @param callable $onRejected  Called when an error happens.
+     *
+     * You must always return the Response in the interface or throw an Exception
+     *
+     * @return Promise Always returns a new promise which is resolved with value of the executed
+     *                 callback (onFulfilled / onRejected)
+     */
+    public function then(callable $onFulfilled = null, callable $onRejected = null)
+    {
+        if ($onFulfilled) {
+            $this->core->addOnFulfilled($onFulfilled);
+        }
+        if ($onRejected) {
+            $this->core->addOnRejected($onRejected);
+        }
+
+        return new self($this->core, $this->runner);
+    }
+
+    /**
+     * Get the state of the promise, one of PENDING, FULFILLED or REJECTED.
+     *
+     * @return string
+     */
+    public function getState()
+    {
+        return $this->core->getState();
+    }
+
+    /**
+     * Wait for the promise to be fulfilled or rejected.
+     *
+     * When this method returns, the request has been resolved and the appropriate callable has terminated.
+     *
+     * When called with the unwrap option
+     *
+     * @param bool $unwrap Whether to return resolved value / throw reason or not
+     *
+     * @return \Psr\Http\Message\ResponseInterface|null Resolved value, null if $unwrap is set to false
+     *
+     * @throws \Http\Client\Exception The rejection reason
+     */
+    public function wait($unwrap = true)
+    {
+        $this->runner->wait($this->core);
+
+        if ($unwrap) {
+            if ($this->core->getState() === self::REJECTED) {
+                throw $this->core->getException();
+            }
+
+            return $this->core->getResponse();
+        }
+
+        return null;
+    }
+}
--- a/modules/paynow/vendor/php-http/curl-client/src/MultiRunner.php
+++ b/modules/paynow/vendor/php-http/curl-client/src/MultiRunner.php
@@ -0,0 +1,131 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Http\Client\Curl;
+
+use Http\Client\Exception\RequestException;
+
+/**
+ * Simultaneous requests runner.
+ *
+ * @license http://opensource.org/licenses/MIT MIT
+ * @author  Михаил Красильников <m.krasilnikov@yandex.ru>
+ */
+class MultiRunner
+{
+    /**
+     * cURL multi handle.
+     *
+     * @var resource|null
+     */
+    private $multiHandle;
+
+    /**
+     * Awaiting cores.
+     *
+     * @var PromiseCore[]
+     */
+    private $cores = [];
+
+    /**
+     * Release resources if still active.
+     */
+    public function __destruct()
+    {
+        if (is_resource($this->multiHandle)) {
+            curl_multi_close($this->multiHandle);
+        }
+    }
+
+    /**
+     * Add promise to runner.
+     *
+     * @param PromiseCore $core
+     */
+    public function add(PromiseCore $core): void
+    {
+        foreach ($this->cores as $existed) {
+            if ($existed === $core) {
+                return;
+            }
+        }
+
+        $this->cores[] = $core;
+
+        if (null === $this->multiHandle) {
+            $this->multiHandle = curl_multi_init();
+        }
+        curl_multi_add_handle($this->multiHandle, $core->getHandle());
+    }
+
+    /**
+     * Remove promise from runner.
+     *
+     * @param PromiseCore $core
+     */
+    public function remove(PromiseCore $core): void
+    {
+        foreach ($this->cores as $index => $existed) {
+            if ($existed === $core) {
+                curl_multi_remove_handle($this->multiHandle, $core->getHandle());
+                unset($this->cores[$index]);
+
+                return;
+            }
+        }
+    }
+
+    /**
+     * Wait for request(s) to be completed.
+     *
+     * @param PromiseCore|null $targetCore
+     */
+    public function wait(PromiseCore $targetCore = null): void
+    {
+        do {
+            $status = curl_multi_exec($this->multiHandle, $active);
+            $info = curl_multi_info_read($this->multiHandle);
+            if (false !== $info) {
+                $core = $this->findCoreByHandle($info['handle']);
+
+                if (null === $core) {
+                    // We have no promise for this handle. Drop it.
+                    curl_multi_remove_handle($this->multiHandle, $info['handle']);
+                    continue;
+                }
+
+                if (CURLE_OK === $info['result']) {
+                    $core->fulfill();
+                } else {
+                    $error = curl_error($core->getHandle());
+                    $core->reject(new RequestException($error, $core->getRequest()));
+                }
+                $this->remove($core);
+
+                // This is a promise we are waited for. So exiting wait().
+                if ($core === $targetCore) {
+                    return;
+                }
+            }
+        } while ($status === CURLM_CALL_MULTI_PERFORM || $active);
+    }
+
+    /**
+     * Find core by handle.
+     *
+     * @param resource $handle
+     *
+     * @return PromiseCore|null
+     */
+    private function findCoreByHandle($handle): ?PromiseCore
+    {
+        foreach ($this->cores as $core) {
+            if ($core->getHandle() === $handle) {
+                return $core;
+            }
+        }
+
+        return null;
+    }
+}
--- a/modules/paynow/vendor/php-http/curl-client/src/PromiseCore.php
+++ b/modules/paynow/vendor/php-http/curl-client/src/PromiseCore.php
@@ -0,0 +1,252 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Http\Client\Curl;
+
+use Http\Client\Exception;
+use Http\Promise\Promise;
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
+
+/**
+ * Shared promises core.
+ *
+ * @license http://opensource.org/licenses/MIT MIT
+ * @author  Михаил Красильников <m.krasilnikov@yandex.ru>
+ */
+class PromiseCore
+{
+    /**
+     * HTTP request.
+     *
+     * @var RequestInterface
+     */
+    private $request;
+
+    /**
+     * cURL handle.
+     *
+     * @var resource
+     */
+    private $handle;
+
+    /**
+     * Response builder.
+     *
+     * @var ResponseBuilder
+     */
+    private $responseBuilder;
+
+    /**
+     * Promise state.
+     *
+     * @var string
+     */
+    private $state;
+
+    /**
+     * Exception.
+     *
+     * @var Exception|null
+     */
+    private $exception = null;
+
+    /**
+     * Functions to call when a response will be available.
+     *
+     * @var callable[]
+     */
+    private $onFulfilled = [];
+
+    /**
+     * Functions to call when an error happens.
+     *
+     * @var callable[]
+     */
+    private $onRejected = [];
+
+    /**
+     * Create shared core.
+     *
+     * @param RequestInterface     $request HTTP request.
+     * @param resource|\CurlHandle $handle cURL handle.
+     * @param ResponseBuilder      $responseBuilder Response builder.
+     *
+     * @throws \InvalidArgumentException If $handle is not a cURL resource.
+     */
+    public function __construct(
+        RequestInterface $request,
+        $handle,
+        ResponseBuilder $responseBuilder
+    ) {
+        if (PHP_MAJOR_VERSION === 7) {
+            if (!is_resource($handle)) {
+                throw new \InvalidArgumentException(
+                    sprintf(
+                        'Parameter $handle expected to be a cURL resource, %s given',
+                        gettype($handle)
+                    )
+                );
+            } elseif (get_resource_type($handle) !== 'curl') {
+                throw new \InvalidArgumentException(
+                    sprintf(
+                        'Parameter $handle expected to be a cURL resource, %s resource given',
+                        get_resource_type($handle)
+                    )
+                );
+            }
+        }
+
+        if (PHP_MAJOR_VERSION > 7 && !$handle instanceof \CurlHandle) {
+            throw new \InvalidArgumentException(
+                sprintf(
+                    'Parameter $handle expected to be a cURL resource, %s given',
+                    get_debug_type($handle)
+                )
+            );
+        }
+
+        $this->request = $request;
+        $this->handle = $handle;
+        $this->responseBuilder = $responseBuilder;
+        $this->state = Promise::PENDING;
+    }
+
+    /**
+     * Add on fulfilled callback.
+     *
+     * @param callable $callback
+     */
+    public function addOnFulfilled(callable $callback): void
+    {
+        if ($this->getState() === Promise::PENDING) {
+            $this->onFulfilled[] = $callback;
+        } elseif ($this->getState() === Promise::FULFILLED) {
+            $response = call_user_func($callback, $this->responseBuilder->getResponse());
+            if ($response instanceof ResponseInterface) {
+                $this->responseBuilder->setResponse($response);
+            }
+        }
+    }
+
+    /**
+     * Add on rejected callback.
+     *
+     * @param callable $callback
+     */
+    public function addOnRejected(callable $callback): void
+    {
+        if ($this->getState() === Promise::PENDING) {
+            $this->onRejected[] = $callback;
+        } elseif ($this->getState() === Promise::REJECTED) {
+            $this->exception = call_user_func($callback, $this->exception);
+        }
+    }
+
+    /**
+     * Return cURL handle.
+     *
+     * @return resource|\CurlHandle
+     */
+    public function getHandle()
+    {
+        return $this->handle;
+    }
+
+    /**
+     * Get the state of the promise, one of PENDING, FULFILLED or REJECTED.
+     *
+     * @return string
+     */
+    public function getState(): string
+    {
+        return $this->state;
+    }
+
+    /**
+     * Return request.
+     *
+     * @return RequestInterface
+     */
+    public function getRequest(): RequestInterface
+    {
+        return $this->request;
+    }
+
+    /**
+     * Return the value of the promise (fulfilled).
+     *
+     * @return ResponseInterface Response object only when the Promise is fulfilled
+     */
+    public function getResponse(): ResponseInterface
+    {
+        return $this->responseBuilder->getResponse();
+    }
+
+    /**
+     * Get the reason why the promise was rejected.
+     *
+     * If the exception is an instance of Http\Client\Exception\HttpException it will contain
+     * the response object with the status code and the http reason.
+     *
+     * @return \Throwable Exception Object only when the Promise is rejected
+     *
+     * @throws \LogicException When the promise is not rejected
+     */
+    public function getException(): \Throwable
+    {
+        if (null === $this->exception) {
+            throw new \LogicException('Promise is not rejected');
+        }
+
+        return $this->exception;
+    }
+
+    /**
+     * Fulfill promise.
+     */
+    public function fulfill(): void
+    {
+        $this->state = Promise::FULFILLED;
+        $response = $this->responseBuilder->getResponse();
+        try {
+            $response->getBody()->seek(0);
+        } catch (\RuntimeException $e) {
+            $exception = new Exception\TransferException($e->getMessage(), $e->getCode(), $e);
+            $this->reject($exception);
+
+            return;
+        }
+
+        while (count($this->onFulfilled) > 0) {
+            $callback = array_shift($this->onFulfilled);
+            $response = call_user_func($callback, $response);
+        }
+
+        if ($response instanceof ResponseInterface) {
+            $this->responseBuilder->setResponse($response);
+        }
+    }
+
+    /**
+     * Reject promise.
+     *
+     * @param Exception $exception Reject reason
+     */
+    public function reject(Exception $exception): void
+    {
+        $this->exception = $exception;
+        $this->state = Promise::REJECTED;
+
+        while (count($this->onRejected) > 0) {
+            $callback = array_shift($this->onRejected);
+            try {
+                $exception = call_user_func($callback, $this->exception);
+                $this->exception = $exception;
+            } catch (Exception $exception) {
+                $this->exception = $exception;
+            }
+        }
+    }
+}
--- a/modules/paynow/vendor/php-http/curl-client/src/ResponseBuilder.php
+++ b/modules/paynow/vendor/php-http/curl-client/src/ResponseBuilder.php
@@ -0,0 +1,24 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Http\Client\Curl;
+
+use Http\Message\Builder\ResponseBuilder as OriginalResponseBuilder;
+use Psr\Http\Message\ResponseInterface;
+
+/**
+ * Extended response builder.
+ */
+class ResponseBuilder extends OriginalResponseBuilder
+{
+    /**
+     * Replace response with a new instance.
+     *
+     * @param ResponseInterface $response
+     */
+    public function setResponse(ResponseInterface $response): void
+    {
+        $this->response = $response;
+    }
+}
--- a/modules/paynow/vendor/php-http/curl-client/src/index.php
+++ b/modules/paynow/vendor/php-http/curl-client/src/index.php
@@ -0,0 +1,11 @@
+<?php
+
+header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
+header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
+
+header('Cache-Control: no-store, no-cache, must-revalidate');
+header('Cache-Control: post-check=0, pre-check=0', false);
+header('Pragma: no-cache');
+
+header('Location: ../');
+exit;
--- a/modules/paynow/vendor/php-http/discovery/LICENSE
+++ b/modules/paynow/vendor/php-http/discovery/LICENSE
@@ -0,0 +1,19 @@
+Copyright (c) 2015-2016 PHP HTTP Team <team@php-http.org>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is furnished
+to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
--- a/modules/paynow/vendor/php-http/discovery/composer.json
+++ b/modules/paynow/vendor/php-http/discovery/composer.json
@@ -0,0 +1,49 @@
+{
+    "name": "php-http/discovery",
+    "description": "Finds installed HTTPlug implementations and PSR-7 message factories",
+    "license": "MIT",
+    "keywords": ["http", "discovery", "client", "adapter", "message", "factory", "psr7"],
+    "homepage": "http://php-http.org",
+    "authors": [
+        {
+            "name": "Márk Sági-Kazár",
+            "email": "mark.sagikazar@gmail.com"
+        }
+    ],
+    "require": {
+        "php": "^7.1 || ^8.0"
+    },
+    "require-dev": {
+        "graham-campbell/phpspec-skip-example-extension": "^5.0",
+        "php-http/httplug": "^1.0 || ^2.0",
+        "php-http/message-factory": "^1.0",
+        "phpspec/phpspec": "^5.1 || ^6.1"
+    },
+    "suggest": {
+        "php-http/message": "Allow to use Guzzle, Diactoros or Slim Framework factories"
+    },
+    "autoload": {
+        "psr-4": {
+            "Http\\Discovery\\": "src/"
+        }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "spec\\Http\\Discovery\\": "spec/"
+        }
+    },
+    "scripts": {
+        "test": "vendor/bin/phpspec run",
+        "test-ci": "vendor/bin/phpspec run -c phpspec.ci.yml"
+    },
+    "extra": {
+        "branch-alias": {
+            "dev-master": "1.9-dev"
+        }
+    },
+    "conflict": {
+        "nyholm/psr7": "<1.0"
+    },
+    "prefer-stable": true,
+    "minimum-stability": "beta"
+}
--- a/modules/paynow/vendor/php-http/discovery/index.php
+++ b/modules/paynow/vendor/php-http/discovery/index.php
@@ -0,0 +1,11 @@
+<?php
+
+header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
+header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
+
+header('Cache-Control: no-store, no-cache, must-revalidate');
+header('Cache-Control: post-check=0, pre-check=0', false);
+header('Pragma: no-cache');
+
+header('Location: ../');
+exit;
--- a/modules/paynow/vendor/php-http/discovery/src/ClassDiscovery.php
+++ b/modules/paynow/vendor/php-http/discovery/src/ClassDiscovery.php
@@ -0,0 +1,252 @@
+<?php
+
+namespace Http\Discovery;
+
+use Http\Discovery\Exception\ClassInstantiationFailedException;
+use Http\Discovery\Exception\DiscoveryFailedException;
+use Http\Discovery\Exception\NoCandidateFoundException;
+use Http\Discovery\Exception\StrategyUnavailableException;
+
+/**
+ * Registry that based find results on class existence.
+ *
+ * @author David de Boer <david@ddeboer.nl>
+ * @author Márk Sági-Kazár <mark.sagikazar@gmail.com>
+ * @author Tobias Nyholm <tobias.nyholm@gmail.com>
+ */
+abstract class ClassDiscovery
+{
+    /**
+     * A list of strategies to find classes.
+     *
+     * @var array
+     */
+    private static $strategies = [
+        Strategy\CommonClassesStrategy::class,
+        Strategy\CommonPsr17ClassesStrategy::class,
+        Strategy\PuliBetaStrategy::class,
+    ];
+
+    private static $deprecatedStrategies = [
+        Strategy\PuliBetaStrategy::class => true,
+    ];
+
+    /**
+     * Discovery cache to make the second time we use discovery faster.
+     *
+     * @var array
+     */
+    private static $cache = [];
+
+    /**
+     * Finds a class.
+     *
+     * @param string $type
+     *
+     * @return string|\Closure
+     *
+     * @throws DiscoveryFailedException
+     */
+    protected static function findOneByType($type)
+    {
+        // Look in the cache
+        if (null !== ($class = self::getFromCache($type))) {
+            return $class;
+        }
+
+        $exceptions = [];
+        foreach (self::$strategies as $strategy) {
+            try {
+                $candidates = call_user_func($strategy.'::getCandidates', $type);
+            } catch (StrategyUnavailableException $e) {
+                if (!isset(self::$deprecatedStrategies[$strategy])) {
+                    $exceptions[] = $e;
+                }
+
+                continue;
+            }
+
+            foreach ($candidates as $candidate) {
+                if (isset($candidate['condition'])) {
+                    if (!self::evaluateCondition($candidate['condition'])) {
+                        continue;
+                    }
+                }
+
+                // save the result for later use
+                self::storeInCache($type, $candidate);
+
+                return $candidate['class'];
+            }
+
+            $exceptions[] = new NoCandidateFoundException($strategy, $candidates);
+        }
+
+        throw DiscoveryFailedException::create($exceptions);
+    }
+
+    /**
+     * Get a value from cache.
+     *
+     * @param string $type
+     *
+     * @return string|null
+     */
+    private static function getFromCache($type)
+    {
+        if (!isset(self::$cache[$type])) {
+            return;
+        }
+
+        $candidate = self::$cache[$type];
+        if (isset($candidate['condition'])) {
+            if (!self::evaluateCondition($candidate['condition'])) {
+                return;
+            }
+        }
+
+        return $candidate['class'];
+    }
+
+    /**
+     * Store a value in cache.
+     *
+     * @param string $type
+     * @param string $class
+     */
+    private static function storeInCache($type, $class)
+    {
+        self::$cache[$type] = $class;
+    }
+
+    /**
+     * Set new strategies and clear the cache.
+     *
+     * @param array $strategies string array of fully qualified class name to a DiscoveryStrategy
+     */
+    public static function setStrategies(array $strategies)
+    {
+        self::$strategies = $strategies;
+        self::clearCache();
+    }
+
+    /**
+     * Returns the currently configured discovery strategies as fully qualified class names.
+     *
+     * @return string[]
+     */
+    public static function getStrategies(): iterable
+    {
+        return self::$strategies;
+    }
+
+    /**
+     * Append a strategy at the end of the strategy queue.
+     *
+     * @param string $strategy Fully qualified class name to a DiscoveryStrategy
+     */
+    public static function appendStrategy($strategy)
+    {
+        self::$strategies[] = $strategy;
+        self::clearCache();
+    }
+
+    /**
+     * Prepend a strategy at the beginning of the strategy queue.
+     *
+     * @param string $strategy Fully qualified class name to a DiscoveryStrategy
+     */
+    public static function prependStrategy($strategy)
+    {
+        array_unshift(self::$strategies, $strategy);
+        self::clearCache();
+    }
+
+    /**
+     * Clear the cache.
+     */
+    public static function clearCache()
+    {
+        self::$cache = [];
+    }
+
+    /**
+     * Evaluates conditions to boolean.
+     *
+     * @param mixed $condition
+     *
+     * @return bool
+     */
+    protected static function evaluateCondition($condition)
+    {
+        if (is_string($condition)) {
+            // Should be extended for functions, extensions???
+            return self::safeClassExists($condition);
+        }
+        if (is_callable($condition)) {
+            return (bool) $condition();
+        }
+        if (is_bool($condition)) {
+            return $condition;
+        }
+        if (is_array($condition)) {
+            foreach ($condition as $c) {
+                if (false === static::evaluateCondition($c)) {
+                    // Immediately stop execution if the condition is false
+                    return false;
+                }
+            }
+
+            return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * Get an instance of the $class.
+     *
+     * @param string|\Closure $class a FQCN of a class or a closure that instantiate the class
+     *
+     * @return object
+     *
+     * @throws ClassInstantiationFailedException
+     */
+    protected static function instantiateClass($class)
+    {
+        try {
+            if (is_string($class)) {
+                return new $class();
+            }
+
+            if (is_callable($class)) {
+                return $class();
+            }
+        } catch (\Exception $e) {
+            throw new ClassInstantiationFailedException('Unexpected exception when instantiating class.', 0, $e);
+        }
+
+        throw new ClassInstantiationFailedException('Could not instantiate class because parameter is neither a callable nor a string');
+    }
+
+    /**
+     * We want to do a "safe" version of PHP's "class_exists" because Magento has a bug
+     * (or they call it a "feature"). Magento is throwing an exception if you do class_exists()
+     * on a class that ends with "Factory" and if that file does not exits.
+     *
+     * This function will catch all potential exceptions and make sure it returns a boolean.
+     *
+     * @param string $class
+     * @param bool   $autoload
+     *
+     * @return bool
+     */
+    public static function safeClassExists($class)
+    {
+        try {
+            return class_exists($class) || interface_exists($class);
+        } catch (\Exception $e) {
+            return false;
+        }
+    }
+}
--- a/modules/paynow/vendor/php-http/discovery/src/Exception.php
+++ b/modules/paynow/vendor/php-http/discovery/src/Exception.php
@@ -0,0 +1,12 @@
+<?php
+
+namespace Http\Discovery;
+
+/**
+ * An interface implemented by all discovery related exceptions.
+ *
+ * @author Tobias Nyholm <tobias.nyholm@gmail.com>
+ */
+interface Exception
+{
+}
--- a/modules/paynow/vendor/php-http/discovery/src/Exception/ClassInstantiationFailedException.php
+++ b/modules/paynow/vendor/php-http/discovery/src/Exception/ClassInstantiationFailedException.php
@@ -0,0 +1,14 @@
+<?php
+
+namespace Http\Discovery\Exception;
+
+use Http\Discovery\Exception;
+
+/**
+ * Thrown when a class fails to instantiate.
+ *
+ * @author Tobias Nyholm <tobias.nyholm@gmail.com>
+ */
+final class ClassInstantiationFailedException extends \RuntimeException implements Exception
+{
+}
--- a/modules/paynow/vendor/php-http/discovery/src/Exception/DiscoveryFailedException.php
+++ b/modules/paynow/vendor/php-http/discovery/src/Exception/DiscoveryFailedException.php
@@ -0,0 +1,51 @@
+<?php
+
+namespace Http\Discovery\Exception;
+
+use Http\Discovery\Exception;
+
+/**
+ * Thrown when all discovery strategies fails to find a resource.
+ *
+ * @author Tobias Nyholm <tobias.nyholm@gmail.com>
+ */
+final class DiscoveryFailedException extends \Exception implements Exception
+{
+    /**
+     * @var \Exception[]
+     */
+    private $exceptions;
+
+    /**
+     * @param string       $message
+     * @param \Exception[] $exceptions
+     */
+    public function __construct($message, array $exceptions = [])
+    {
+        $this->exceptions = $exceptions;
+
+        parent::__construct($message);
+    }
+
+    /**
+     * @param \Exception[] $exceptions
+     */
+    public static function create($exceptions)
+    {
+        $message = 'Could not find resource using any discovery strategy. Find more information at http://docs.php-http.org/en/latest/discovery.html#common-errors';
+        foreach ($exceptions as $e) {
+            $message .= "\n - ".$e->getMessage();
+        }
+        $message .= "\n\n";
+
+        return new self($message, $exceptions);
+    }
+
+    /**
+     * @return \Exception[]
+     */
+    public function getExceptions()
+    {
+        return $this->exceptions;
+    }
+}
--- a/modules/paynow/vendor/php-http/discovery/src/Exception/NoCandidateFoundException.php
+++ b/modules/paynow/vendor/php-http/discovery/src/Exception/NoCandidateFoundException.php
@@ -0,0 +1,47 @@
+<?php
+
+namespace Http\Discovery\Exception;
+
+use Http\Discovery\Exception;
+
+/**
+ * When we have used a strategy but no candidates provided by that strategy could be used.
+ *
+ * @author Tobias Nyholm <tobias.nyholm@gmail.com>
+ */
+final class NoCandidateFoundException extends \Exception implements Exception
+{
+    /**
+     * @param string $strategy
+     */
+    public function __construct($strategy, array $candidates)
+    {
+        $classes = array_map(
+            function ($a) {
+                return $a['class'];
+            },
+            $candidates
+        );
+
+        $message = sprintf(
+            'No valid candidate found using strategy "%s". We tested the following candidates: %s.',
+            $strategy,
+            implode(', ', array_map([$this, 'stringify'], $classes))
+        );
+
+        parent::__construct($message);
+    }
+
+    private function stringify($mixed)
+    {
+        if (is_string($mixed)) {
+            return $mixed;
+        }
+
+        if (is_array($mixed) && 2 === count($mixed)) {
+            return sprintf('%s::%s', $this->stringify($mixed[0]), $mixed[1]);
+        }
+
+        return is_object($mixed) ? get_class($mixed) : gettype($mixed);
+    }
+}
--- a/modules/paynow/vendor/php-http/discovery/src/Exception/NotFoundException.php
+++ b/modules/paynow/vendor/php-http/discovery/src/Exception/NotFoundException.php
@@ -0,0 +1,16 @@
+<?php
+
+namespace Http\Discovery\Exception;
+
+use Http\Discovery\Exception;
+
+/**
+ * Thrown when a discovery does not find any matches.
+ *
+ * @final do NOT extend this class, not final for BC reasons
+ *
+ * @author Márk Sági-Kazár <mark.sagikazar@gmail.com>
+ */
+/* final */ class NotFoundException extends \RuntimeException implements Exception
+{
+}
--- a/modules/paynow/vendor/php-http/discovery/src/Exception/PuliUnavailableException.php
+++ b/modules/paynow/vendor/php-http/discovery/src/Exception/PuliUnavailableException.php
@@ -0,0 +1,12 @@
+<?php
+
+namespace Http\Discovery\Exception;
+
+/**
+ * Thrown when we can't use Puli for discovery.
+ *
+ * @author Tobias Nyholm <tobias.nyholm@gmail.com>
+ */
+final class PuliUnavailableException extends StrategyUnavailableException
+{
+}
--- a/modules/paynow/vendor/php-http/discovery/src/Exception/StrategyUnavailableException.php
+++ b/modules/paynow/vendor/php-http/discovery/src/Exception/StrategyUnavailableException.php
@@ -0,0 +1,15 @@
+<?php
+
+namespace Http\Discovery\Exception;
+
+use Http\Discovery\Exception;
+
+/**
+ * This exception is thrown when we cannot use a discovery strategy. This is *not* thrown when
+ * the discovery fails to find a class.
+ *
+ * @author Tobias Nyholm <tobias.nyholm@gmail.com>
+ */
+class StrategyUnavailableException extends \RuntimeException implements Exception
+{
+}
--- a/modules/paynow/vendor/php-http/discovery/src/Exception/index.php
+++ b/modules/paynow/vendor/php-http/discovery/src/Exception/index.php
@@ -0,0 +1,11 @@
+<?php
+
+header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
+header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
+
+header('Cache-Control: no-store, no-cache, must-revalidate');
+header('Cache-Control: post-check=0, pre-check=0', false);
+header('Pragma: no-cache');
+
+header('Location: ../');
+exit;
--- a/modules/paynow/vendor/php-http/discovery/src/HttpAsyncClientDiscovery.php
+++ b/modules/paynow/vendor/php-http/discovery/src/HttpAsyncClientDiscovery.php
@@ -0,0 +1,32 @@
+<?php
+
+namespace Http\Discovery;
+
+use Http\Client\HttpAsyncClient;
+use Http\Discovery\Exception\DiscoveryFailedException;
+
+/**
+ * Finds an HTTP Asynchronous Client.
+ *
+ * @author Joel Wurtz <joel.wurtz@gmail.com>
+ */
+final class HttpAsyncClientDiscovery extends ClassDiscovery
+{
+    /**
+     * Finds an HTTP Async Client.
+     *
+     * @return HttpAsyncClient
+     *
+     * @throws Exception\NotFoundException
+     */
+    public static function find()
+    {
+        try {
+            $asyncClient = static::findOneByType(HttpAsyncClient::class);
+        } catch (DiscoveryFailedException $e) {
+            throw new NotFoundException('No HTTPlug async clients found. Make sure to install a package providing "php-http/async-client-implementation". Example: "php-http/guzzle6-adapter".', 0, $e);
+        }
+
+        return static::instantiateClass($asyncClient);
+    }
+}
--- a/modules/paynow/vendor/php-http/discovery/src/HttpClientDiscovery.php
+++ b/modules/paynow/vendor/php-http/discovery/src/HttpClientDiscovery.php
@@ -0,0 +1,32 @@
+<?php
+
+namespace Http\Discovery;
+
+use Http\Client\HttpClient;
+use Http\Discovery\Exception\DiscoveryFailedException;
+
+/**
+ * Finds an HTTP Client.
+ *
+ * @author Márk Sági-Kazár <mark.sagikazar@gmail.com>
+ */
+final class HttpClientDiscovery extends ClassDiscovery
+{
+    /**
+     * Finds an HTTP Client.
+     *
+     * @return HttpClient
+     *
+     * @throws Exception\NotFoundException
+     */
+    public static function find()
+    {
+        try {
+            $client = static::findOneByType(HttpClient::class);
+        } catch (DiscoveryFailedException $e) {
+            throw new NotFoundException('No HTTPlug clients found. Make sure to install a package providing "php-http/client-implementation". Example: "php-http/guzzle6-adapter".', 0, $e);
+        }
+
+        return static::instantiateClass($client);
+    }
+}
--- a/modules/paynow/vendor/php-http/discovery/src/MessageFactoryDiscovery.php
+++ b/modules/paynow/vendor/php-http/discovery/src/MessageFactoryDiscovery.php
@@ -0,0 +1,34 @@
+<?php
+
+namespace Http\Discovery;
+
+use Http\Discovery\Exception\DiscoveryFailedException;
+use Http\Message\MessageFactory;
+
+/**
+ * Finds a Message Factory.
+ *
+ * @author Márk Sági-Kazár <mark.sagikazar@gmail.com>
+ *
+ * @deprecated This will be removed in 2.0. Consider using Psr17FactoryDiscovery.
+ */
+final class MessageFactoryDiscovery extends ClassDiscovery
+{
+    /**
+     * Finds a Message Factory.
+     *
+     * @return MessageFactory
+     *
+     * @throws Exception\NotFoundException
+     */
+    public static function find()
+    {
+        try {
+            $messageFactory = static::findOneByType(MessageFactory::class);
+        } catch (DiscoveryFailedException $e) {
+            throw new NotFoundException('No message factories found. To use Guzzle, Diactoros or Slim Framework factories install php-http/message and the chosen message implementation.', 0, $e);
+        }
+
+        return static::instantiateClass($messageFactory);
+    }
+}
--- a/modules/paynow/vendor/php-http/discovery/src/NotFoundException.php
+++ b/modules/paynow/vendor/php-http/discovery/src/NotFoundException.php
@@ -0,0 +1,14 @@
+<?php
+
+namespace Http\Discovery;
+
+/**
+ * Thrown when a discovery does not find any matches.
+ *
+ * @author Márk Sági-Kazár <mark.sagikazar@gmail.com>
+ *
+ * @deprecated since since version 1.0, and will be removed in 2.0. Use {@link \Http\Discovery\Exception\NotFoundException} instead.
+ */
+final class NotFoundException extends \Http\Discovery\Exception\NotFoundException
+{
+}
--- a/modules/paynow/vendor/php-http/discovery/src/Psr17FactoryDiscovery.php
+++ b/modules/paynow/vendor/php-http/discovery/src/Psr17FactoryDiscovery.php
@@ -0,0 +1,136 @@
+<?php
+
+namespace Http\Discovery;
+
+use Http\Discovery\Exception\DiscoveryFailedException;
+use Psr\Http\Message\RequestFactoryInterface;
+use Psr\Http\Message\ResponseFactoryInterface;
+use Psr\Http\Message\ServerRequestFactoryInterface;
+use Psr\Http\Message\StreamFactoryInterface;
+use Psr\Http\Message\UploadedFileFactoryInterface;
+use Psr\Http\Message\UriFactoryInterface;
+
+/**
+ * Finds PSR-17 factories.
+ *
+ * @author Tobias Nyholm <tobias.nyholm@gmail.com>
+ */
+final class Psr17FactoryDiscovery extends ClassDiscovery
+{
+    private static function createException($type, Exception $e)
+    {
+        return new \Http\Discovery\Exception\NotFoundException(
+            'No PSR-17 '.$type.' found. Install a package from this list: https://packagist.org/providers/psr/http-factory-implementation',
+            0,
+            $e
+        );
+    }
+
+    /**
+     * @return RequestFactoryInterface
+     *
+     * @throws Exception\NotFoundException
+     */
+    public static function findRequestFactory()
+    {
+        try {
+            $messageFactory = static::findOneByType(RequestFactoryInterface::class);
+        } catch (DiscoveryFailedException $e) {
+            throw self::createException('request factory', $e);
+        }
+
+        return static::instantiateClass($messageFactory);
+    }
+
+    /**
+     * @return ResponseFactoryInterface
+     *
+     * @throws Exception\NotFoundException
+     */
+    public static function findResponseFactory()
+    {
+        try {
+            $messageFactory = static::findOneByType(ResponseFactoryInterface::class);
+        } catch (DiscoveryFailedException $e) {
+            throw self::createException('response factory', $e);
+        }
+
+        return static::instantiateClass($messageFactory);
+    }
+
+    /**
+     * @return ServerRequestFactoryInterface
+     *
+     * @throws Exception\NotFoundException
+     */
+    public static function findServerRequestFactory()
+    {
+        try {
+            $messageFactory = static::findOneByType(ServerRequestFactoryInterface::class);
+        } catch (DiscoveryFailedException $e) {
+            throw self::createException('server request factory', $e);
+        }
+
+        return static::instantiateClass($messageFactory);
+    }
+
+    /**
+     * @return StreamFactoryInterface
+     *
+     * @throws Exception\NotFoundException
+     */
+    public static function findStreamFactory()
+    {
+        try {
+            $messageFactory = static::findOneByType(StreamFactoryInterface::class);
+        } catch (DiscoveryFailedException $e) {
+            throw self::createException('stream factory', $e);
+        }
+
+        return static::instantiateClass($messageFactory);
+    }
+
+    /**
+     * @return UploadedFileFactoryInterface
+     *
+     * @throws Exception\NotFoundException
+     */
+    public static function findUploadedFileFactory()
+    {
+        try {
+            $messageFactory = static::findOneByType(UploadedFileFactoryInterface::class);
+        } catch (DiscoveryFailedException $e) {
+            throw self::createException('uploaded file factory', $e);
+        }
+
+        return static::instantiateClass($messageFactory);
+    }
+
+    /**
+     * @return UriFactoryInterface
+     *
+     * @throws Exception\NotFoundException
+     */
+    public static function findUriFactory()
+    {
+        try {
+            $messageFactory = static::findOneByType(UriFactoryInterface::class);
+        } catch (DiscoveryFailedException $e) {
+            throw self::createException('url factory', $e);
+        }
+
+        return static::instantiateClass($messageFactory);
+    }
+
+    /**
+     * @return UriFactoryInterface
+     *
+     * @throws Exception\NotFoundException
+     *
+     * @deprecated This will be removed in 2.0. Consider using the findUriFactory() method.
+     */
+    public static function findUrlFactory()
+    {
+        return static::findUriFactory();
+    }
+}
--- a/modules/paynow/vendor/php-http/discovery/src/Psr18ClientDiscovery.php
+++ b/modules/paynow/vendor/php-http/discovery/src/Psr18ClientDiscovery.php
@@ -0,0 +1,32 @@
+<?php
+
+namespace Http\Discovery;
+
+use Http\Discovery\Exception\DiscoveryFailedException;
+use Psr\Http\Client\ClientInterface;
+
+/**
+ * Finds a PSR-18 HTTP Client.
+ *
+ * @author Tobias Nyholm <tobias.nyholm@gmail.com>
+ */
+final class Psr18ClientDiscovery extends ClassDiscovery
+{
+    /**
+     * Finds a PSR-18 HTTP Client.
+     *
+     * @return ClientInterface
+     *
+     * @throws Exception\NotFoundException
+     */
+    public static function find()
+    {
+        try {
+            $client = static::findOneByType(ClientInterface::class);
+        } catch (DiscoveryFailedException $e) {
+            throw new \Http\Discovery\Exception\NotFoundException('No PSR-18 clients found. Make sure to install a package providing "psr/http-client-implementation". Example: "php-http/guzzle7-adapter".', 0, $e);
+        }
+
+        return static::instantiateClass($client);
+    }
+}
--- a/modules/paynow/vendor/php-http/discovery/src/Strategy/CommonClassesStrategy.php
+++ b/modules/paynow/vendor/php-http/discovery/src/Strategy/CommonClassesStrategy.php
@@ -0,0 +1,189 @@
+<?php
+
+namespace Http\Discovery\Strategy;
+
+use GuzzleHttp\Client as GuzzleHttp;
+use GuzzleHttp\Promise\Promise;
+use GuzzleHttp\Psr7\Request as GuzzleRequest;
+use Http\Adapter\Artax\Client as Artax;
+use Http\Adapter\Buzz\Client as Buzz;
+use Http\Adapter\Cake\Client as Cake;
+use Http\Adapter\Guzzle5\Client as Guzzle5;
+use Http\Adapter\Guzzle6\Client as Guzzle6;
+use Http\Adapter\Guzzle7\Client as Guzzle7;
+use Http\Adapter\React\Client as React;
+use Http\Adapter\Zend\Client as Zend;
+use Http\Client\Curl\Client as Curl;
+use Http\Client\HttpAsyncClient;
+use Http\Client\HttpClient;
+use Http\Client\Socket\Client as Socket;
+use Http\Discovery\ClassDiscovery;
+use Http\Discovery\Exception\NotFoundException;
+use Http\Discovery\MessageFactoryDiscovery;
+use Http\Discovery\Psr17FactoryDiscovery;
+use Http\Message\MessageFactory;
+use Http\Message\MessageFactory\DiactorosMessageFactory;
+use Http\Message\MessageFactory\GuzzleMessageFactory;
+use Http\Message\MessageFactory\SlimMessageFactory;
+use Http\Message\RequestFactory;
+use Http\Message\StreamFactory;
+use Http\Message\StreamFactory\DiactorosStreamFactory;
+use Http\Message\StreamFactory\GuzzleStreamFactory;
+use Http\Message\StreamFactory\SlimStreamFactory;
+use Http\Message\UriFactory;
+use Http\Message\UriFactory\DiactorosUriFactory;
+use Http\Message\UriFactory\GuzzleUriFactory;
+use Http\Message\UriFactory\SlimUriFactory;
+use Laminas\Diactoros\Request as DiactorosRequest;
+use Nyholm\Psr7\Factory\HttplugFactory as NyholmHttplugFactory;
+use Psr\Http\Client\ClientInterface as Psr18Client;
+use Psr\Http\Message\RequestFactoryInterface as Psr17RequestFactory;
+use Slim\Http\Request as SlimRequest;
+use Symfony\Component\HttpClient\HttplugClient as SymfonyHttplug;
+use Symfony\Component\HttpClient\Psr18Client as SymfonyPsr18;
+use Zend\Diactoros\Request as ZendDiactorosRequest;
+
+/**
+ * @internal
+ *
+ * @author Tobias Nyholm <tobias.nyholm@gmail.com>
+ */
+final class CommonClassesStrategy implements DiscoveryStrategy
+{
+    /**
+     * @var array
+     */
+    private static $classes = [
+        MessageFactory::class => [
+            ['class' => NyholmHttplugFactory::class, 'condition' => [NyholmHttplugFactory::class]],
+            ['class' => GuzzleMessageFactory::class, 'condition' => [GuzzleRequest::class, GuzzleMessageFactory::class]],
+            ['class' => DiactorosMessageFactory::class, 'condition' => [ZendDiactorosRequest::class, DiactorosMessageFactory::class]],
+            ['class' => DiactorosMessageFactory::class, 'condition' => [DiactorosRequest::class, DiactorosMessageFactory::class]],
+            ['class' => SlimMessageFactory::class, 'condition' => [SlimRequest::class, SlimMessageFactory::class]],
+        ],
+        StreamFactory::class => [
+            ['class' => NyholmHttplugFactory::class, 'condition' => [NyholmHttplugFactory::class]],
+            ['class' => GuzzleStreamFactory::class, 'condition' => [GuzzleRequest::class, GuzzleStreamFactory::class]],
+            ['class' => DiactorosStreamFactory::class, 'condition' => [ZendDiactorosRequest::class, DiactorosStreamFactory::class]],
+            ['class' => DiactorosStreamFactory::class, 'condition' => [DiactorosRequest::class, DiactorosStreamFactory::class]],
+            ['class' => SlimStreamFactory::class, 'condition' => [SlimRequest::class, SlimStreamFactory::class]],
+        ],
+        UriFactory::class => [
+            ['class' => NyholmHttplugFactory::class, 'condition' => [NyholmHttplugFactory::class]],
+            ['class' => GuzzleUriFactory::class, 'condition' => [GuzzleRequest::class, GuzzleUriFactory::class]],
+            ['class' => DiactorosUriFactory::class, 'condition' => [ZendDiactorosRequest::class, DiactorosUriFactory::class]],
+            ['class' => DiactorosUriFactory::class, 'condition' => [DiactorosRequest::class, DiactorosUriFactory::class]],
+            ['class' => SlimUriFactory::class, 'condition' => [SlimRequest::class, SlimUriFactory::class]],
+        ],
+        HttpAsyncClient::class => [
+            ['class' => SymfonyHttplug::class, 'condition' => [SymfonyHttplug::class, Promise::class, RequestFactory::class, [self::class, 'isPsr17FactoryInstalled']]],
+            ['class' => Guzzle7::class, 'condition' => Guzzle7::class],
+            ['class' => Guzzle6::class, 'condition' => Guzzle6::class],
+            ['class' => Curl::class, 'condition' => Curl::class],
+            ['class' => React::class, 'condition' => React::class],
+        ],
+        HttpClient::class => [
+            ['class' => SymfonyHttplug::class, 'condition' => [SymfonyHttplug::class, RequestFactory::class, [self::class, 'isPsr17FactoryInstalled']]],
+            ['class' => Guzzle7::class, 'condition' => Guzzle7::class],
+            ['class' => Guzzle6::class, 'condition' => Guzzle6::class],
+            ['class' => Guzzle5::class, 'condition' => Guzzle5::class],
+            ['class' => Curl::class, 'condition' => Curl::class],
+            ['class' => Socket::class, 'condition' => Socket::class],
+            ['class' => Buzz::class, 'condition' => Buzz::class],
+            ['class' => React::class, 'condition' => React::class],
+            ['class' => Cake::class, 'condition' => Cake::class],
+            ['class' => Zend::class, 'condition' => Zend::class],
+            ['class' => Artax::class, 'condition' => Artax::class],
+            [
+                'class' => [self::class, 'buzzInstantiate'],
+                'condition' => [\Buzz\Client\FileGetContents::class, \Buzz\Message\ResponseBuilder::class],
+            ],
+        ],
+        Psr18Client::class => [
+            [
+                'class' => [self::class, 'symfonyPsr18Instantiate'],
+                'condition' => [SymfonyPsr18::class, Psr17RequestFactory::class],
+            ],
+            [
+                'class' => GuzzleHttp::class,
+                'condition' => [self::class, 'isGuzzleImplementingPsr18'],
+            ],
+            [
+                'class' => [self::class, 'buzzInstantiate'],
+                'condition' => [\Buzz\Client\FileGetContents::class, \Buzz\Message\ResponseBuilder::class],
+            ],
+        ],
+    ];
+
+    /**
+     * {@inheritdoc}
+     */
+    public static function getCandidates($type)
+    {
+        if (Psr18Client::class === $type) {
+            return self::getPsr18Candidates();
+        }
+
+        return self::$classes[$type] ?? [];
+    }
+
+    /**
+     * @return array The return value is always an array with zero or more elements. Each
+     *               element is an array with two keys ['class' => string, 'condition' => mixed].
+     */
+    private static function getPsr18Candidates()
+    {
+        $candidates = self::$classes[Psr18Client::class];
+
+        // HTTPlug 2.0 clients implements PSR18Client too.
+        foreach (self::$classes[HttpClient::class] as $c) {
+            if (!is_string($c['class'])) {
+                continue;
+            }
+            try {
+                if (ClassDiscovery::safeClassExists($c['class']) && is_subclass_of($c['class'], Psr18Client::class)) {
+                    $candidates[] = $c;
+                }
+            } catch (\Throwable $e) {
+                trigger_error(sprintf('Got exception "%s (%s)" while checking if a PSR-18 Client is available', get_class($e), $e->getMessage()), E_USER_WARNING);
+            }
+        }
+
+        return $candidates;
+    }
+
+    public static function buzzInstantiate()
+    {
+        return new \Buzz\Client\FileGetContents(MessageFactoryDiscovery::find());
+    }
+
+    public static function symfonyPsr18Instantiate()
+    {
+        return new SymfonyPsr18(null, Psr17FactoryDiscovery::findResponseFactory(), Psr17FactoryDiscovery::findStreamFactory());
+    }
+
+    public static function isGuzzleImplementingPsr18()
+    {
+        return defined('GuzzleHttp\ClientInterface::MAJOR_VERSION');
+    }
+
+    /**
+     * Can be used as a condition.
+     *
+     * @return bool
+     */
+    public static function isPsr17FactoryInstalled()
+    {
+        try {
+            Psr17FactoryDiscovery::findResponseFactory();
+        } catch (NotFoundException $e) {
+            return false;
+        } catch (\Throwable $e) {
+            trigger_error(sprintf('Got exception "%s (%s)" while checking if a PSR-17 ResponseFactory is available', get_class($e), $e->getMessage()), E_USER_WARNING);
+
+            return false;
+        }
+
+        return true;
+    }
+}
--- a/modules/paynow/vendor/php-http/discovery/src/Strategy/CommonPsr17ClassesStrategy.php
+++ b/modules/paynow/vendor/php-http/discovery/src/Strategy/CommonPsr17ClassesStrategy.php
@@ -0,0 +1,105 @@
+<?php
+
+namespace Http\Discovery\Strategy;
+
+use Psr\Http\Message\RequestFactoryInterface;
+use Psr\Http\Message\ResponseFactoryInterface;
+use Psr\Http\Message\ServerRequestFactoryInterface;
+use Psr\Http\Message\StreamFactoryInterface;
+use Psr\Http\Message\UploadedFileFactoryInterface;
+use Psr\Http\Message\UriFactoryInterface;
+
+/**
+ * @internal
+ *
+ * @author Tobias Nyholm <tobias.nyholm@gmail.com>
+ */
+final class CommonPsr17ClassesStrategy implements DiscoveryStrategy
+{
+    /**
+     * @var array
+     */
+    private static $classes = [
+        RequestFactoryInterface::class => [
+            'Phalcon\Http\Message\RequestFactory',
+            'Nyholm\Psr7\Factory\Psr17Factory',
+            'Zend\Diactoros\RequestFactory',
+            'GuzzleHttp\Psr7\HttpFactory',
+            'Http\Factory\Diactoros\RequestFactory',
+            'Http\Factory\Guzzle\RequestFactory',
+            'Http\Factory\Slim\RequestFactory',
+            'Laminas\Diactoros\RequestFactory',
+            'Slim\Psr7\Factory\RequestFactory',
+        ],
+        ResponseFactoryInterface::class => [
+            'Phalcon\Http\Message\ResponseFactory',
+            'Nyholm\Psr7\Factory\Psr17Factory',
+            'Zend\Diactoros\ResponseFactory',
+            'GuzzleHttp\Psr7\HttpFactory',
+            'Http\Factory\Diactoros\ResponseFactory',
+            'Http\Factory\Guzzle\ResponseFactory',
+            'Http\Factory\Slim\ResponseFactory',
+            'Laminas\Diactoros\ResponseFactory',
+            'Slim\Psr7\Factory\ResponseFactory',
+        ],
+        ServerRequestFactoryInterface::class => [
+            'Phalcon\Http\Message\ServerRequestFactory',
+            'Nyholm\Psr7\Factory\Psr17Factory',
+            'Zend\Diactoros\ServerRequestFactory',
+            'GuzzleHttp\Psr7\HttpFactory',
+            'Http\Factory\Diactoros\ServerRequestFactory',
+            'Http\Factory\Guzzle\ServerRequestFactory',
+            'Http\Factory\Slim\ServerRequestFactory',
+            'Laminas\Diactoros\ServerRequestFactory',
+            'Slim\Psr7\Factory\ServerRequestFactory',
+        ],
+        StreamFactoryInterface::class => [
+            'Phalcon\Http\Message\StreamFactory',
+            'Nyholm\Psr7\Factory\Psr17Factory',
+            'Zend\Diactoros\StreamFactory',
+            'GuzzleHttp\Psr7\HttpFactory',
+            'Http\Factory\Diactoros\StreamFactory',
+            'Http\Factory\Guzzle\StreamFactory',
+            'Http\Factory\Slim\StreamFactory',
+            'Laminas\Diactoros\StreamFactory',
+            'Slim\Psr7\Factory\StreamFactory',
+        ],
+        UploadedFileFactoryInterface::class => [
+            'Phalcon\Http\Message\UploadedFileFactory',
+            'Nyholm\Psr7\Factory\Psr17Factory',
+            'Zend\Diactoros\UploadedFileFactory',
+            'GuzzleHttp\Psr7\HttpFactory',
+            'Http\Factory\Diactoros\UploadedFileFactory',
+            'Http\Factory\Guzzle\UploadedFileFactory',
+            'Http\Factory\Slim\UploadedFileFactory',
+            'Laminas\Diactoros\UploadedFileFactory',
+            'Slim\Psr7\Factory\UploadedFileFactory',
+        ],
+        UriFactoryInterface::class => [
+            'Phalcon\Http\Message\UriFactory',
+            'Nyholm\Psr7\Factory\Psr17Factory',
+            'Zend\Diactoros\UriFactory',
+            'GuzzleHttp\Psr7\HttpFactory',
+            'Http\Factory\Diactoros\UriFactory',
+            'Http\Factory\Guzzle\UriFactory',
+            'Http\Factory\Slim\UriFactory',
+            'Laminas\Diactoros\UriFactory',
+            'Slim\Psr7\Factory\UriFactory',
+        ],
+    ];
+
+    /**
+     * {@inheritdoc}
+     */
+    public static function getCandidates($type)
+    {
+        $candidates = [];
+        if (isset(self::$classes[$type])) {
+            foreach (self::$classes[$type] as $class) {
+                $candidates[] = ['class' => $class, 'condition' => [$class]];
+            }
+        }
+
+        return $candidates;
+    }
+}
--- a/modules/paynow/vendor/php-http/discovery/src/Strategy/DiscoveryStrategy.php
+++ b/modules/paynow/vendor/php-http/discovery/src/Strategy/DiscoveryStrategy.php
@@ -0,0 +1,23 @@
+<?php
+
+namespace Http\Discovery\Strategy;
+
+use Http\Discovery\Exception\StrategyUnavailableException;
+
+/**
+ * @author Tobias Nyholm <tobias.nyholm@gmail.com>
+ */
+interface DiscoveryStrategy
+{
+    /**
+     * Find a resource of a specific type.
+     *
+     * @param string $type
+     *
+     * @return array The return value is always an array with zero or more elements. Each
+     *               element is an array with two keys ['class' => string, 'condition' => mixed].
+     *
+     * @throws StrategyUnavailableException if we cannot use this strategy
+     */
+    public static function getCandidates($type);
+}
--- a/modules/paynow/vendor/php-http/discovery/src/Strategy/MockClientStrategy.php
+++ b/modules/paynow/vendor/php-http/discovery/src/Strategy/MockClientStrategy.php
@@ -0,0 +1,27 @@
+<?php
+
+namespace Http\Discovery\Strategy;
+
+use Http\Client\HttpAsyncClient;
+use Http\Client\HttpClient;
+use Http\Mock\Client as Mock;
+
+/**
+ * Find the Mock client.
+ *
+ * @author Sam Rapaport <me@samrapdev.com>
+ */
+final class MockClientStrategy implements DiscoveryStrategy
+{
+    /**
+     * {@inheritdoc}
+     */
+    public static function getCandidates($type)
+    {
+        if (is_a(HttpClient::class, $type, true) || is_a(HttpAsyncClient::class, $type, true)) {
+            return [['class' => Mock::class, 'condition' => Mock::class]];
+        }
+
+        return [];
+    }
+}
--- a/modules/paynow/vendor/php-http/discovery/src/Strategy/PuliBetaStrategy.php
+++ b/modules/paynow/vendor/php-http/discovery/src/Strategy/PuliBetaStrategy.php
@@ -0,0 +1,92 @@
+<?php
+
+namespace Http\Discovery\Strategy;
+
+use Http\Discovery\ClassDiscovery;
+use Http\Discovery\Exception\PuliUnavailableException;
+use Puli\Discovery\Api\Discovery;
+use Puli\GeneratedPuliFactory;
+
+/**
+ * Find candidates using Puli.
+ *
+ * @internal
+ * @final
+ *
+ * @author David de Boer <david@ddeboer.nl>
+ * @author Márk Sági-Kazár <mark.sagikazar@gmail.com>
+ */
+class PuliBetaStrategy implements DiscoveryStrategy
+{
+    /**
+     * @var GeneratedPuliFactory
+     */
+    protected static $puliFactory;
+
+    /**
+     * @var Discovery
+     */
+    protected static $puliDiscovery;
+
+    /**
+     * @return GeneratedPuliFactory
+     *
+     * @throws PuliUnavailableException
+     */
+    private static function getPuliFactory()
+    {
+        if (null === self::$puliFactory) {
+            if (!defined('PULI_FACTORY_CLASS')) {
+                throw new PuliUnavailableException('Puli Factory is not available');
+            }
+
+            $puliFactoryClass = PULI_FACTORY_CLASS;
+
+            if (!ClassDiscovery::safeClassExists($puliFactoryClass)) {
+                throw new PuliUnavailableException('Puli Factory class does not exist');
+            }
+
+            self::$puliFactory = new $puliFactoryClass();
+        }
+
+        return self::$puliFactory;
+    }
+
+    /**
+     * Returns the Puli discovery layer.
+     *
+     * @return Discovery
+     *
+     * @throws PuliUnavailableException
+     */
+    private static function getPuliDiscovery()
+    {
+        if (!isset(self::$puliDiscovery)) {
+            $factory = self::getPuliFactory();
+            $repository = $factory->createRepository();
+
+            self::$puliDiscovery = $factory->createDiscovery($repository);
+        }
+
+        return self::$puliDiscovery;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public static function getCandidates($type)
+    {
+        $returnData = [];
+        $bindings = self::getPuliDiscovery()->findBindings($type);
+
+        foreach ($bindings as $binding) {
+            $condition = true;
+            if ($binding->hasParameterValue('depends')) {
+                $condition = $binding->getParameterValue('depends');
+            }
+            $returnData[] = ['class' => $binding->getClassName(), 'condition' => $condition];
+        }
+
+        return $returnData;
+    }
+}
--- a/modules/paynow/vendor/php-http/discovery/src/Strategy/index.php
+++ b/modules/paynow/vendor/php-http/discovery/src/Strategy/index.php
@@ -0,0 +1,11 @@
+<?php
+
+header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
+header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
+
+header('Cache-Control: no-store, no-cache, must-revalidate');
+header('Cache-Control: post-check=0, pre-check=0', false);
+header('Pragma: no-cache');
+
+header('Location: ../');
+exit;
--- a/modules/paynow/vendor/php-http/discovery/src/StreamFactoryDiscovery.php
+++ b/modules/paynow/vendor/php-http/discovery/src/StreamFactoryDiscovery.php
@@ -0,0 +1,34 @@
+<?php
+
+namespace Http\Discovery;
+
+use Http\Discovery\Exception\DiscoveryFailedException;
+use Http\Message\StreamFactory;
+
+/**
+ * Finds a Stream Factory.
+ *
+ * @author Михаил Красильников <m.krasilnikov@yandex.ru>
+ *
+ * @deprecated This will be removed in 2.0. Consider using Psr17FactoryDiscovery.
+ */
+final class StreamFactoryDiscovery extends ClassDiscovery
+{
+    /**
+     * Finds a Stream Factory.
+     *
+     * @return StreamFactory
+     *
+     * @throws Exception\NotFoundException
+     */
+    public static function find()
+    {
+        try {
+            $streamFactory = static::findOneByType(StreamFactory::class);
+        } catch (DiscoveryFailedException $e) {
+            throw new NotFoundException('No stream factories found. To use Guzzle, Diactoros or Slim Framework factories install php-http/message and the chosen message implementation.', 0, $e);
+        }
+
+        return static::instantiateClass($streamFactory);
+    }
+}
--- a/modules/paynow/vendor/php-http/discovery/src/UriFactoryDiscovery.php
+++ b/modules/paynow/vendor/php-http/discovery/src/UriFactoryDiscovery.php
@@ -0,0 +1,34 @@
+<?php
+
+namespace Http\Discovery;
+
+use Http\Discovery\Exception\DiscoveryFailedException;
+use Http\Message\UriFactory;
+
+/**
+ * Finds a URI Factory.
+ *
+ * @author David de Boer <david@ddeboer.nl>
+ *
+ * @deprecated This will be removed in 2.0. Consider using Psr17FactoryDiscovery.
+ */
+final class UriFactoryDiscovery extends ClassDiscovery
+{
+    /**
+     * Finds a URI Factory.
+     *
+     * @return UriFactory
+     *
+     * @throws Exception\NotFoundException
+     */
+    public static function find()
+    {
+        try {
+            $uriFactory = static::findOneByType(UriFactory::class);
+        } catch (DiscoveryFailedException $e) {
+            throw new NotFoundException('No uri factories found. To use Guzzle, Diactoros or Slim Framework factories install php-http/message and the chosen message implementation.', 0, $e);
+        }
+
+        return static::instantiateClass($uriFactory);
+    }
+}
--- a/modules/paynow/vendor/php-http/discovery/src/index.php
+++ b/modules/paynow/vendor/php-http/discovery/src/index.php
@@ -0,0 +1,11 @@
+<?php
+
+header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
+header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
+
+header('Cache-Control: no-store, no-cache, must-revalidate');
+header('Cache-Control: post-check=0, pre-check=0', false);
+header('Pragma: no-cache');
+
+header('Location: ../');
+exit;
--- a/modules/paynow/vendor/php-http/httplug/LICENSE
+++ b/modules/paynow/vendor/php-http/httplug/LICENSE
@@ -0,0 +1,20 @@
+Copyright (c) 2014 Eric GELOEN <geloen.eric@gmail.com>
+Copyright (c) 2015 PHP HTTP Team <team@php-http.org>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is furnished
+to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
--- a/modules/paynow/vendor/php-http/httplug/composer.json
+++ b/modules/paynow/vendor/php-http/httplug/composer.json
@@ -0,0 +1,45 @@
+{
+    "name": "php-http/httplug",
+    "description": "HTTPlug, the HTTP client abstraction for PHP",
+    "keywords": [
+        "http",
+        "client"
+    ],
+    "homepage": "http://httplug.io",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Eric GELOEN",
+            "email": "geloen.eric@gmail.com"
+        },
+        {
+            "name": "Márk Sági-Kazár",
+            "email": "mark.sagikazar@gmail.com",
+            "homepage": "https://sagikazarmark.hu"
+        }
+    ],
+    "require": {
+        "php": "^7.1 || ^8.0",
+        "php-http/promise": "^1.1",
+        "psr/http-client": "^1.0",
+        "psr/http-message": "^1.0"
+    },
+    "require-dev": {
+        "friends-of-phpspec/phpspec-code-coverage": "^4.1",
+        "phpspec/phpspec": "^5.1 || ^6.0"
+    },
+    "extra": {
+        "branch-alias": {
+            "dev-master": "2.x-dev"
+        }
+    },
+    "autoload": {
+        "psr-4": {
+            "Http\\Client\\": "src/"
+        }
+    },
+    "scripts": {
+        "test": "vendor/bin/phpspec run",
+        "test-ci": "vendor/bin/phpspec run -c phpspec.ci.yml"
+    }
+}
--- a/modules/paynow/vendor/php-http/httplug/index.php
+++ b/modules/paynow/vendor/php-http/httplug/index.php
@@ -0,0 +1,11 @@
+<?php
+
+header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
+header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
+
+header('Cache-Control: no-store, no-cache, must-revalidate');
+header('Cache-Control: post-check=0, pre-check=0', false);
+header('Pragma: no-cache');
+
+header('Location: ../');
+exit;
--- a/modules/paynow/vendor/php-http/httplug/puli.json
+++ b/modules/paynow/vendor/php-http/httplug/puli.json
@@ -0,0 +1,12 @@
+{
+    "version": "1.0",
+    "name": "php-http/httplug",
+    "binding-types": {
+        "Http\\Client\\HttpAsyncClient": {
+            "description": "Async HTTP Client"
+        },
+        "Http\\Client\\HttpClient": {
+            "description": "HTTP Client"
+        }
+    }
+}
--- a/modules/paynow/vendor/php-http/httplug/src/Exception.php
+++ b/modules/paynow/vendor/php-http/httplug/src/Exception.php
@@ -0,0 +1,14 @@
+<?php
+
+namespace Http\Client;
+
+use Psr\Http\Client\ClientExceptionInterface as PsrClientException;
+
+/**
+ * Every HTTP Client related Exception must implement this interface.
+ *
+ * @author Márk Sági-Kazár <mark.sagikazar@gmail.com>
+ */
+interface Exception extends PsrClientException
+{
+}
--- a/modules/paynow/vendor/php-http/httplug/src/Exception/HttpException.php
+++ b/modules/paynow/vendor/php-http/httplug/src/Exception/HttpException.php
@@ -0,0 +1,65 @@
+<?php
+
+namespace Http\Client\Exception;
+
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
+
+/**
+ * Thrown when a response was received but the request itself failed.
+ *
+ * In addition to the request, this exception always provides access to the response object.
+ *
+ * @author Márk Sági-Kazár <mark.sagikazar@gmail.com>
+ */
+class HttpException extends RequestException
+{
+    /**
+     * @var ResponseInterface
+     */
+    protected $response;
+
+    /**
+     * @param string $message
+     */
+    public function __construct(
+        $message,
+        RequestInterface $request,
+        ResponseInterface $response,
+        \Exception $previous = null
+    ) {
+        parent::__construct($message, $request, $previous);
+
+        $this->response = $response;
+        $this->code = $response->getStatusCode();
+    }
+
+    /**
+     * Returns the response.
+     *
+     * @return ResponseInterface
+     */
+    public function getResponse()
+    {
+        return $this->response;
+    }
+
+    /**
+     * Factory method to create a new exception with a normalized error message.
+     */
+    public static function create(
+        RequestInterface $request,
+        ResponseInterface $response,
+        \Exception $previous = null
+    ) {
+        $message = sprintf(
+            '[url] %s [http method] %s [status code] %s [reason phrase] %s',
+            $request->getRequestTarget(),
+            $request->getMethod(),
+            $response->getStatusCode(),
+            $response->getReasonPhrase()
+        );
+
+        return new static($message, $request, $response, $previous);
+    }
+}
--- a/modules/paynow/vendor/php-http/httplug/src/Exception/NetworkException.php
+++ b/modules/paynow/vendor/php-http/httplug/src/Exception/NetworkException.php
@@ -0,0 +1,28 @@
+<?php
+
+namespace Http\Client\Exception;
+
+use Psr\Http\Client\NetworkExceptionInterface as PsrNetworkException;
+use Psr\Http\Message\RequestInterface;
+
+/**
+ * Thrown when the request cannot be completed because of network issues.
+ *
+ * There is no response object as this exception is thrown when no response has been received.
+ *
+ * @author Márk Sági-Kazár <mark.sagikazar@gmail.com>
+ */
+class NetworkException extends TransferException implements PsrNetworkException
+{
+    use RequestAwareTrait;
+
+    /**
+     * @param string $message
+     */
+    public function __construct($message, RequestInterface $request, \Exception $previous = null)
+    {
+        $this->setRequest($request);
+
+        parent::__construct($message, 0, $previous);
+    }
+}
--- a/modules/paynow/vendor/php-http/httplug/src/Exception/RequestAwareTrait.php
+++ b/modules/paynow/vendor/php-http/httplug/src/Exception/RequestAwareTrait.php
@@ -0,0 +1,26 @@
+<?php
+
+namespace Http\Client\Exception;
+
+use Psr\Http\Message\RequestInterface;
+
+trait RequestAwareTrait
+{
+    /**
+     * @var RequestInterface
+     */
+    private $request;
+
+    private function setRequest(RequestInterface $request)
+    {
+        $this->request = $request;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getRequest(): RequestInterface
+    {
+        return $this->request;
+    }
+}
--- a/modules/paynow/vendor/php-http/httplug/src/Exception/RequestException.php
+++ b/modules/paynow/vendor/php-http/httplug/src/Exception/RequestException.php
@@ -0,0 +1,29 @@
+<?php
+
+namespace Http\Client\Exception;
+
+use Psr\Http\Client\RequestExceptionInterface as PsrRequestException;
+use Psr\Http\Message\RequestInterface;
+
+/**
+ * Exception for when a request failed, providing access to the failed request.
+ *
+ * This could be due to an invalid request, or one of the extending exceptions
+ * for network errors or HTTP error responses.
+ *
+ * @author Márk Sági-Kazár <mark.sagikazar@gmail.com>
+ */
+class RequestException extends TransferException implements PsrRequestException
+{
+    use RequestAwareTrait;
+
+    /**
+     * @param string $message
+     */
+    public function __construct($message, RequestInterface $request, \Exception $previous = null)
+    {
+        $this->setRequest($request);
+
+        parent::__construct($message, 0, $previous);
+    }
+}
--- a/modules/paynow/vendor/php-http/httplug/src/Exception/TransferException.php
+++ b/modules/paynow/vendor/php-http/httplug/src/Exception/TransferException.php
@@ -0,0 +1,14 @@
+<?php
+
+namespace Http\Client\Exception;
+
+use Http\Client\Exception;
+
+/**
+ * Base exception for transfer related exceptions.
+ *
+ * @author Márk Sági-Kazár <mark.sagikazar@gmail.com>
+ */
+class TransferException extends \RuntimeException implements Exception
+{
+}
--- a/modules/paynow/vendor/php-http/httplug/src/Exception/index.php
+++ b/modules/paynow/vendor/php-http/httplug/src/Exception/index.php
@@ -0,0 +1,11 @@
+<?php
+
+header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
+header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
+
+header('Cache-Control: no-store, no-cache, must-revalidate');
+header('Cache-Control: post-check=0, pre-check=0', false);
+header('Pragma: no-cache');
+
+header('Location: ../');
+exit;
--- a/modules/paynow/vendor/php-http/httplug/src/HttpAsyncClient.php
+++ b/modules/paynow/vendor/php-http/httplug/src/HttpAsyncClient.php
@@ -0,0 +1,25 @@
+<?php
+
+namespace Http\Client;
+
+use Http\Promise\Promise;
+use Psr\Http\Message\RequestInterface;
+
+/**
+ * Sends a PSR-7 Request in an asynchronous way by returning a Promise.
+ *
+ * @author Joel Wurtz <joel.wurtz@gmail.com>
+ */
+interface HttpAsyncClient
+{
+    /**
+     * Sends a PSR-7 request in an asynchronous way.
+     *
+     * Exceptions related to processing the request are available from the returned Promise.
+     *
+     * @return Promise resolves a PSR-7 Response or fails with an Http\Client\Exception
+     *
+     * @throws \Exception If processing the request is impossible (eg. bad configuration).
+     */
+    public function sendAsyncRequest(RequestInterface $request);
+}
--- a/modules/paynow/vendor/php-http/httplug/src/HttpClient.php
+++ b/modules/paynow/vendor/php-http/httplug/src/HttpClient.php
@@ -0,0 +1,15 @@
+<?php
+
+namespace Http\Client;
+
+use Psr\Http\Client\ClientInterface;
+
+/**
+ * {@inheritdoc}
+ *
+ * Provide the Httplug HttpClient interface for BC.
+ * You should typehint Psr\Http\Client\ClientInterface in new code
+ */
+interface HttpClient extends ClientInterface
+{
+}
--- a/modules/paynow/vendor/php-http/httplug/src/Promise/HttpFulfilledPromise.php
+++ b/modules/paynow/vendor/php-http/httplug/src/Promise/HttpFulfilledPromise.php
@@ -0,0 +1,54 @@
+<?php
+
+namespace Http\Client\Promise;
+
+use Http\Client\Exception;
+use Http\Promise\Promise;
+use Psr\Http\Message\ResponseInterface;
+
+final class HttpFulfilledPromise implements Promise
+{
+    /**
+     * @var ResponseInterface
+     */
+    private $response;
+
+    public function __construct(ResponseInterface $response)
+    {
+        $this->response = $response;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function then(callable $onFulfilled = null, callable $onRejected = null)
+    {
+        if (null === $onFulfilled) {
+            return $this;
+        }
+
+        try {
+            return new self($onFulfilled($this->response));
+        } catch (Exception $e) {
+            return new HttpRejectedPromise($e);
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getState()
+    {
+        return Promise::FULFILLED;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function wait($unwrap = true)
+    {
+        if ($unwrap) {
+            return $this->response;
+        }
+    }
+}
--- a/modules/paynow/vendor/php-http/httplug/src/Promise/HttpRejectedPromise.php
+++ b/modules/paynow/vendor/php-http/httplug/src/Promise/HttpRejectedPromise.php
@@ -0,0 +1,58 @@
+<?php
+
+namespace Http\Client\Promise;
+
+use Http\Client\Exception;
+use Http\Promise\Promise;
+
+final class HttpRejectedPromise implements Promise
+{
+    /**
+     * @var Exception
+     */
+    private $exception;
+
+    public function __construct(Exception $exception)
+    {
+        $this->exception = $exception;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function then(callable $onFulfilled = null, callable $onRejected = null)
+    {
+        if (null === $onRejected) {
+            return $this;
+        }
+
+        try {
+            $result = $onRejected($this->exception);
+            if ($result instanceof Promise) {
+                return $result;
+            }
+
+            return new HttpFulfilledPromise($result);
+        } catch (Exception $e) {
+            return new self($e);
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getState()
+    {
+        return Promise::REJECTED;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function wait($unwrap = true)
+    {
+        if ($unwrap) {
+            throw $this->exception;
+        }
+    }
+}
--- a/modules/paynow/vendor/php-http/httplug/src/Promise/index.php
+++ b/modules/paynow/vendor/php-http/httplug/src/Promise/index.php
@@ -0,0 +1,11 @@
+<?php
+
+header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
+header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
+
+header('Cache-Control: no-store, no-cache, must-revalidate');
+header('Cache-Control: post-check=0, pre-check=0', false);
+header('Pragma: no-cache');
+
+header('Location: ../');
+exit;
--- a/modules/paynow/vendor/php-http/httplug/src/index.php
+++ b/modules/paynow/vendor/php-http/httplug/src/index.php
@@ -0,0 +1,11 @@
+<?php
+
+header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
+header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
+
+header('Cache-Control: no-store, no-cache, must-revalidate');
+header('Cache-Control: post-check=0, pre-check=0', false);
+header('Pragma: no-cache');
+
+header('Location: ../');
+exit;
--- a/modules/paynow/vendor/php-http/index.php
+++ b/modules/paynow/vendor/php-http/index.php
@@ -0,0 +1,11 @@
+<?php
+
+header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
+header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
+
+header('Cache-Control: no-store, no-cache, must-revalidate');
+header('Cache-Control: post-check=0, pre-check=0', false);
+header('Pragma: no-cache');
+
+header('Location: ../');
+exit;
--- a/modules/paynow/vendor/php-http/message-factory/LICENSE
+++ b/modules/paynow/vendor/php-http/message-factory/LICENSE
@@ -0,0 +1,19 @@
+Copyright (c) 2015 PHP HTTP Team <team@php-http.org>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is furnished
+to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
--- a/modules/paynow/vendor/php-http/message-factory/composer.json
+++ b/modules/paynow/vendor/php-http/message-factory/composer.json
@@ -0,0 +1,27 @@
+{
+    "name": "php-http/message-factory",
+    "description": "Factory interfaces for PSR-7 HTTP Message",
+    "license": "MIT",
+    "keywords": ["http", "factory", "message", "stream", "uri"],
+    "homepage": "http://php-http.org",
+    "authors": [
+        {
+            "name": "Márk Sági-Kazár",
+            "email": "mark.sagikazar@gmail.com"
+        }
+    ],
+    "require": {
+        "php": ">=5.4",
+        "psr/http-message": "^1.0"
+    },
+    "autoload": {
+        "psr-4": {
+            "Http\\Message\\": "src/"
+        }
+    },
+    "extra": {
+        "branch-alias": {
+            "dev-master": "1.0-dev"
+        }
+    }
+}
--- a/modules/paynow/vendor/php-http/message-factory/index.php
+++ b/modules/paynow/vendor/php-http/message-factory/index.php
@@ -0,0 +1,11 @@
+<?php
+
+header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
+header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
+
+header('Cache-Control: no-store, no-cache, must-revalidate');
+header('Cache-Control: post-check=0, pre-check=0', false);
+header('Pragma: no-cache');
+
+header('Location: ../');
+exit;
--- a/modules/paynow/vendor/php-http/message-factory/puli.json
+++ b/modules/paynow/vendor/php-http/message-factory/puli.json
@@ -0,0 +1,43 @@
+{
+    "version": "1.0",
+    "binding-types": {
+        "Http\\Message\\MessageFactory": {
+            "description": "PSR-7 Message Factory",
+            "parameters": {
+                "depends": {
+                    "description": "Optional class dependency which can be checked by consumers"
+                }
+            }
+        },
+        "Http\\Message\\RequestFactory": {
+            "parameters": {
+                "depends": {
+                    "description": "Optional class dependency which can be checked by consumers"
+                }
+            }
+        },
+        "Http\\Message\\ResponseFactory": {
+            "parameters": {
+                "depends": {
+                    "description": "Optional class dependency which can be checked by consumers"
+                }
+            }
+        },
+        "Http\\Message\\StreamFactory": {
+            "description": "PSR-7 Stream Factory",
+            "parameters": {
+                "depends": {
+                    "description": "Optional class dependency which can be checked by consumers"
+                }
+            }
+        },
+        "Http\\Message\\UriFactory": {
+            "description": "PSR-7 URI Factory",
+            "parameters": {
+                "depends": {
+                    "description": "Optional class dependency which can be checked by consumers"
+                }
+            }
+        }
+    }
+}
--- a/modules/paynow/vendor/php-http/message-factory/src/MessageFactory.php
+++ b/modules/paynow/vendor/php-http/message-factory/src/MessageFactory.php
@@ -0,0 +1,12 @@
+<?php
+
+namespace Http\Message;
+
+/**
+ * Factory for PSR-7 Request and Response.
+ *
+ * @author Márk Sági-Kazár <mark.sagikazar@gmail.com>
+ */
+interface MessageFactory extends RequestFactory, ResponseFactory
+{
+}
--- a/modules/paynow/vendor/php-http/message-factory/src/RequestFactory.php
+++ b/modules/paynow/vendor/php-http/message-factory/src/RequestFactory.php
@@ -0,0 +1,34 @@
+<?php
+
+namespace Http\Message;
+
+use Psr\Http\Message\UriInterface;
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\StreamInterface;
+
+/**
+ * Factory for PSR-7 Request.
+ *
+ * @author Márk Sági-Kazár <mark.sagikazar@gmail.com>
+ */
+interface RequestFactory
+{
+    /**
+     * Creates a new PSR-7 request.
+     *
+     * @param string                               $method
+     * @param string|UriInterface                  $uri
+     * @param array                                $headers
+     * @param resource|string|StreamInterface|null $body
+     * @param string                               $protocolVersion
+     *
+     * @return RequestInterface
+     */
+    public function createRequest(
+        $method,
+        $uri,
+        array $headers = [],
+        $body = null,
+        $protocolVersion = '1.1'
+    );
+}
--- a/modules/paynow/vendor/php-http/message-factory/src/ResponseFactory.php
+++ b/modules/paynow/vendor/php-http/message-factory/src/ResponseFactory.php
@@ -0,0 +1,35 @@
+<?php
+
+namespace Http\Message;
+
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\StreamInterface;
+
+/**
+ * Factory for PSR-7 Response.
+ *
+ * This factory contract can be reused in Message and Server Message factories.
+ *
+ * @author Márk Sági-Kazár <mark.sagikazar@gmail.com>
+ */
+interface ResponseFactory
+{
+    /**
+     * Creates a new PSR-7 response.
+     *
+     * @param int                                  $statusCode
+     * @param string|null                          $reasonPhrase
+     * @param array                                $headers
+     * @param resource|string|StreamInterface|null $body
+     * @param string                               $protocolVersion
+     *
+     * @return ResponseInterface
+     */
+    public function createResponse(
+        $statusCode = 200,
+        $reasonPhrase = null,
+        array $headers = [],
+        $body = null,
+        $protocolVersion = '1.1'
+    );
+}
--- a/modules/paynow/vendor/php-http/message-factory/src/StreamFactory.php
+++ b/modules/paynow/vendor/php-http/message-factory/src/StreamFactory.php
@@ -0,0 +1,25 @@
+<?php
+
+namespace Http\Message;
+
+use Psr\Http\Message\StreamInterface;
+
+/**
+ * Factory for PSR-7 Stream.
+ *
+ * @author Márk Sági-Kazár <mark.sagikazar@gmail.com>
+ */
+interface StreamFactory
+{
+    /**
+     * Creates a new PSR-7 stream.
+     *
+     * @param string|resource|StreamInterface|null $body
+     *
+     * @return StreamInterface
+     *
+     * @throws \InvalidArgumentException If the stream body is invalid.
+     * @throws \RuntimeException         If creating the stream from $body fails. 
+     */
+    public function createStream($body = null);
+}
--- a/modules/paynow/vendor/php-http/message-factory/src/UriFactory.php
+++ b/modules/paynow/vendor/php-http/message-factory/src/UriFactory.php
@@ -0,0 +1,24 @@
+<?php
+
+namespace Http\Message;
+
+use Psr\Http\Message\UriInterface;
+
+/**
+ * Factory for PSR-7 URI.
+ *
+ * @author Márk Sági-Kazár <mark.sagikazar@gmail.com>
+ */
+interface UriFactory
+{
+    /**
+     * Creates an PSR-7 URI.
+     *
+     * @param string|UriInterface $uri
+     *
+     * @return UriInterface
+     *
+     * @throws \InvalidArgumentException If the $uri argument can not be converted into a valid URI.
+     */
+    public function createUri($uri);
+}
--- a/modules/paynow/vendor/php-http/message-factory/src/index.php
+++ b/modules/paynow/vendor/php-http/message-factory/src/index.php
@@ -0,0 +1,11 @@
+<?php
+
+header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
+header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
+
+header('Cache-Control: no-store, no-cache, must-revalidate');
+header('Cache-Control: post-check=0, pre-check=0', false);
+header('Pragma: no-cache');
+
+header('Location: ../');
+exit;
--- a/modules/paynow/vendor/php-http/message/LICENSE
+++ b/modules/paynow/vendor/php-http/message/LICENSE
@@ -0,0 +1,19 @@
+Copyright (c) 2015-2016 PHP HTTP Team <team@php-http.org>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is furnished
+to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
--- a/modules/paynow/vendor/php-http/message/apigen.neon
+++ b/modules/paynow/vendor/php-http/message/apigen.neon
@@ -0,0 +1,6 @@
+source:
+    - src/
+
+destination: build/api/
+
+templateTheme: bootstrap
--- a/modules/paynow/vendor/php-http/message/composer.json
+++ b/modules/paynow/vendor/php-http/message/composer.json
@@ -0,0 +1,68 @@
+{
+    "name": "php-http/message",
+    "description": "HTTP Message related tools",
+    "keywords": [
+        "message",
+        "http",
+        "psr-7"
+    ],
+    "homepage": "http://php-http.org",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Márk Sági-Kazár",
+            "email": "mark.sagikazar@gmail.com"
+        }
+    ],
+    "require": {
+        "php": "^7.1 || ^8.0",
+        "clue/stream-filter": "^1.5",
+        "php-http/message-factory": "^1.0.2",
+        "psr/http-message": "^1.0"
+    },
+    "provide": {
+        "php-http/message-factory-implementation": "1.0"
+    },
+    "require-dev": {
+        "ext-zlib": "*",
+        "ergebnis/composer-normalize": "^2.6",
+        "guzzlehttp/psr7": "^1.0",
+        "phpspec/phpspec": "^5.1 || ^6.3 || ^7.1",
+        "slim/slim": "^3.0",
+        "laminas/laminas-diactoros": "^2.0"
+    },
+    "suggest": {
+        "ext-zlib": "Used with compressor/decompressor streams",
+        "guzzlehttp/psr7": "Used with Guzzle PSR-7 Factories",
+        "laminas/laminas-diactoros": "Used with Diactoros Factories",
+        "slim/slim": "Used with Slim Framework PSR-7 implementation"
+    },
+    "config": {
+        "sort-packages": true,
+        "allow-plugins": {
+            "ergebnis/composer-normalize": true
+        }
+    },
+    "extra": {
+        "branch-alias": {
+            "dev-master": "1.10-dev"
+        }
+    },
+    "autoload": {
+        "psr-4": {
+            "Http\\Message\\": "src/"
+        },
+        "files": [
+            "src/filters.php"
+        ]
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "spec\\Http\\Message\\": "spec/"
+        }
+    },
+    "scripts": {
+        "test": "vendor/bin/phpspec run",
+        "test-ci": "vendor/bin/phpspec run -c phpspec.ci.yml"
+    }
+}
--- a/modules/paynow/vendor/php-http/message/index.php
+++ b/modules/paynow/vendor/php-http/message/index.php
@@ -0,0 +1,11 @@
+<?php
+
+header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
+header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
+
+header('Cache-Control: no-store, no-cache, must-revalidate');
+header('Cache-Control: post-check=0, pre-check=0', false);
+header('Pragma: no-cache');
+
+header('Location: ../');
+exit;
--- a/modules/paynow/vendor/php-http/message/puli.json
+++ b/modules/paynow/vendor/php-http/message/puli.json
@@ -0,0 +1,111 @@
+{
+    "version": "1.0",
+    "name": "php-http/message",
+    "bindings": {
+        "064d003d-78a1-48c4-8f3b-1f92ff25da69": {
+            "_class": "Puli\\Discovery\\Binding\\ClassBinding",
+            "class": "Http\\Message\\MessageFactory\\DiactorosMessageFactory",
+            "type": "Http\\Message\\MessageFactory",
+            "parameters": {
+                "depends": "Zend\\Diactoros\\Request"
+            }
+        },
+        "0836751e-6558-4d1b-8993-4a52012947c3": {
+            "_class": "Puli\\Discovery\\Binding\\ClassBinding",
+            "class": "Http\\Message\\MessageFactory\\SlimMessageFactory",
+            "type": "Http\\Message\\ResponseFactory"
+        },
+        "1d127622-dc61-4bfa-b9da-d221548d72c3": {
+            "_class": "Puli\\Discovery\\Binding\\ClassBinding",
+            "class": "Http\\Message\\MessageFactory\\SlimMessageFactory",
+            "type": "Http\\Message\\RequestFactory"
+        },
+        "2438c2d0-0658-441f-8855-ddaf0f87d54d": {
+            "_class": "Puli\\Discovery\\Binding\\ClassBinding",
+            "class": "Http\\Message\\MessageFactory\\GuzzleMessageFactory",
+            "type": "Http\\Message\\MessageFactory",
+            "parameters": {
+                "depends": "GuzzleHttp\\Psr7\\Request"
+            }
+        },
+        "253aa08c-d705-46e7-b1d2-e28c97eef792": {
+            "_class": "Puli\\Discovery\\Binding\\ClassBinding",
+            "class": "Http\\Message\\MessageFactory\\GuzzleMessageFactory",
+            "type": "Http\\Message\\RequestFactory",
+            "parameters": {
+                "depends": "GuzzleHttp\\Psr7\\Request"
+            }
+        },
+        "273a34f9-62f4-4ba1-9801-b1284d49ff89": {
+            "_class": "Puli\\Discovery\\Binding\\ClassBinding",
+            "class": "Http\\Message\\StreamFactory\\GuzzleStreamFactory",
+            "type": "Http\\Message\\StreamFactory",
+            "parameters": {
+                "depends": "GuzzleHttp\\Psr7\\Stream"
+            }
+        },
+        "304b83db-b594-4d83-ae75-1f633adf92f7": {
+            "_class": "Puli\\Discovery\\Binding\\ClassBinding",
+            "class": "Http\\Message\\UriFactory\\GuzzleUriFactory",
+            "type": "Http\\Message\\UriFactory",
+            "parameters": {
+                "depends": "GuzzleHttp\\Psr7\\Uri"
+            }
+        },
+        "3f4bc1cd-aa95-4702-9fa7-65408e471691": {
+            "_class": "Puli\\Discovery\\Binding\\ClassBinding",
+            "class": "Http\\Message\\UriFactory\\DiactorosUriFactory",
+            "type": "Http\\Message\\UriFactory",
+            "parameters": {
+                "depends": "Zend\\Diactoros\\Uri"
+            }
+        },
+        "4672a6ee-ad9e-4109-a5d1-b7d46f26c7a1": {
+            "_class": "Puli\\Discovery\\Binding\\ClassBinding",
+            "class": "Http\\Message\\MessageFactory\\SlimMessageFactory",
+            "type": "Http\\Message\\MessageFactory"
+        },
+        "6234e947-d3bd-43eb-97d5-7f9e22e6bb1b": {
+            "_class": "Puli\\Discovery\\Binding\\ClassBinding",
+            "class": "Http\\Message\\MessageFactory\\DiactorosMessageFactory",
+            "type": "Http\\Message\\ResponseFactory",
+            "parameters": {
+                "depends": "Zend\\Diactoros\\Response"
+            }
+        },
+        "6a9ad6ce-d82c-470f-8e30-60f21d9d95bf": {
+            "_class": "Puli\\Discovery\\Binding\\ClassBinding",
+            "class": "Http\\Message\\UriFactory\\SlimUriFactory",
+            "type": "Http\\Message\\UriFactory"
+        },
+        "72c2afa0-ea56-4d03-adb6-a9f241a8a734": {
+            "_class": "Puli\\Discovery\\Binding\\ClassBinding",
+            "class": "Http\\Message\\StreamFactory\\SlimStreamFactory",
+            "type": "Http\\Message\\StreamFactory"
+        },
+        "95c1be8f-39fe-4abd-8351-92cb14379a75": {
+            "_class": "Puli\\Discovery\\Binding\\ClassBinding",
+            "class": "Http\\Message\\StreamFactory\\DiactorosStreamFactory",
+            "type": "Http\\Message\\StreamFactory",
+            "parameters": {
+                "depends": "Zend\\Diactoros\\Stream"
+            }
+        },
+        "a018af27-7590-4dcf-83a1-497f95604cd6": {
+            "_class": "Puli\\Discovery\\Binding\\ClassBinding",
+            "class": "Http\\Message\\MessageFactory\\GuzzleMessageFactory",
+            "type": "Http\\Message\\ResponseFactory",
+            "parameters": {
+                "depends": "GuzzleHttp\\Psr7\\Response"
+            }
+        },
+        "c07955b1-de46-43db-923b-d07fae9382cb": {
+            "_class": "Puli\\Discovery\\Binding\\ClassBinding",
+            "class": "Http\\Message\\MessageFactory\\DiactorosMessageFactory",
+            "type": "Http\\Message\\RequestFactory",
+            "parameters": {
+                "depends": "Zend\\Diactoros\\Request"
+            }
+        }
+    }
+}
--- a/modules/paynow/vendor/php-http/message/src/Authentication.php
+++ b/modules/paynow/vendor/php-http/message/src/Authentication.php
@@ -0,0 +1,25 @@
+<?php
+
+namespace Http\Message;
+
+use Psr\Http\Message\RequestInterface;
+
+/**
+ * Add authentication information to a PSR-7 Request.
+ *
+ * @author Márk Sági-Kazár <mark.sagikazar@gmail.com>
+ */
+interface Authentication
+{
+    /**
+     * Alter the request to add the authentication credentials.
+     *
+     * To do that, the implementation might use pre-stored credentials or do
+     * separate HTTP requests to obtain a valid token.
+     *
+     * @param RequestInterface $request The request without authentication information
+     *
+     * @return RequestInterface The request with added authentication information
+     */
+    public function authenticate(RequestInterface $request);
+}
--- a/modules/paynow/vendor/php-http/message/src/Authentication/AutoBasicAuth.php
+++ b/modules/paynow/vendor/php-http/message/src/Authentication/AutoBasicAuth.php
@@ -0,0 +1,48 @@
+<?php
+
+namespace Http\Message\Authentication;
+
+use Http\Message\Authentication;
+use Psr\Http\Message\RequestInterface;
+
+/**
+ * Authenticate a PSR-7 Request using Basic Auth based on credentials in the URI.
+ *
+ * @author Márk Sági-Kazár <mark.sagikazar@gmail.com>
+ */
+final class AutoBasicAuth implements Authentication
+{
+    /**
+     * Whether user info should be removed from the URI.
+     *
+     * @var bool
+     */
+    private $shouldRemoveUserInfo;
+
+    /**
+     * @param bool|true $shouldRremoveUserInfo
+     */
+    public function __construct($shouldRremoveUserInfo = true)
+    {
+        $this->shouldRemoveUserInfo = (bool) $shouldRremoveUserInfo;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function authenticate(RequestInterface $request)
+    {
+        $uri = $request->getUri();
+        $userInfo = $uri->getUserInfo();
+
+        if (!empty($userInfo)) {
+            if ($this->shouldRemoveUserInfo) {
+                $request = $request->withUri($uri->withUserInfo(''));
+            }
+
+            $request = $request->withHeader('Authorization', sprintf('Basic %s', base64_encode($userInfo)));
+        }
+
+        return $request;
+    }
+}
--- a/modules/paynow/vendor/php-http/message/src/Authentication/BasicAuth.php
+++ b/modules/paynow/vendor/php-http/message/src/Authentication/BasicAuth.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace Http\Message\Authentication;
+
+use Http\Message\Authentication;
+use Psr\Http\Message\RequestInterface;
+
+/**
+ * Authenticate a PSR-7 Request using Basic Auth.
+ *
+ * @author Márk Sági-Kazár <mark.sagikazar@gmail.com>
+ */
+final class BasicAuth implements Authentication
+{
+    /**
+     * @var string
+     */
+    private $username;
+
+    /**
+     * @var string
+     */
+    private $password;
+
+    /**
+     * @param string $username
+     * @param string $password
+     */
+    public function __construct($username, $password)
+    {
+        $this->username = $username;
+        $this->password = $password;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function authenticate(RequestInterface $request)
+    {
+        $header = sprintf('Basic %s', base64_encode(sprintf('%s:%s', $this->username, $this->password)));
+
+        return $request->withHeader('Authorization', $header);
+    }
+}
--- a/modules/paynow/vendor/php-http/message/src/Authentication/Bearer.php
+++ b/modules/paynow/vendor/php-http/message/src/Authentication/Bearer.php
@@ -0,0 +1,37 @@
+<?php
+
+namespace Http\Message\Authentication;
+
+use Http\Message\Authentication;
+use Psr\Http\Message\RequestInterface;
+
+/**
+ * Authenticate a PSR-7 Request using a token.
+ *
+ * @author Márk Sági-Kazár <mark.sagikazar@gmail.com>
+ */
+final class Bearer implements Authentication
+{
+    /**
+     * @var string
+     */
+    private $token;
+
+    /**
+     * @param string $token
+     */
+    public function __construct($token)
+    {
+        $this->token = $token;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function authenticate(RequestInterface $request)
+    {
+        $header = sprintf('Bearer %s', $this->token);
+
+        return $request->withHeader('Authorization', $header);
+    }
+}
--- a/modules/paynow/vendor/php-http/message/src/Authentication/Chain.php
+++ b/modules/paynow/vendor/php-http/message/src/Authentication/Chain.php
@@ -0,0 +1,47 @@
+<?php
+
+namespace Http\Message\Authentication;
+
+use Http\Message\Authentication;
+use Psr\Http\Message\RequestInterface;
+
+/**
+ * Authenticate a PSR-7 Request with a multiple authentication methods.
+ *
+ * @author Márk Sági-Kazár <mark.sagikazar@gmail.com>
+ */
+final class Chain implements Authentication
+{
+    /**
+     * @var Authentication[]
+     */
+    private $authenticationChain = [];
+
+    /**
+     * @param Authentication[] $authenticationChain
+     */
+    public function __construct(array $authenticationChain = [])
+    {
+        foreach ($authenticationChain as $authentication) {
+            if (!$authentication instanceof Authentication) {
+                throw new \InvalidArgumentException(
+                    'Members of the authentication chain must be of type Http\Message\Authentication'
+                );
+            }
+        }
+
+        $this->authenticationChain = $authenticationChain;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function authenticate(RequestInterface $request)
+    {
+        foreach ($this->authenticationChain as $authentication) {
+            $request = $authentication->authenticate($request);
+        }
+
+        return $request;
+    }
+}
--- a/modules/paynow/vendor/php-http/message/src/Authentication/Header.php
+++ b/modules/paynow/vendor/php-http/message/src/Authentication/Header.php
@@ -0,0 +1,36 @@
+<?php
+
+namespace Http\Message\Authentication;
+
+use Http\Message\Authentication;
+use Psr\Http\Message\RequestInterface;
+
+class Header implements Authentication
+{
+    /**
+     * @var string
+     */
+    private $name;
+
+    /**
+     * @var string|string[]
+     */
+    private $value;
+
+    /**
+     * @param string|string[] $value
+     */
+    public function __construct(string $name, $value)
+    {
+        $this->name = $name;
+        $this->value = $value;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function authenticate(RequestInterface $request)
+    {
+        return $request->withHeader($this->name, $this->value);
+    }
+}
--- a/modules/paynow/vendor/php-http/message/src/Authentication/Matching.php
+++ b/modules/paynow/vendor/php-http/message/src/Authentication/Matching.php
@@ -0,0 +1,69 @@
+<?php
+
+namespace Http\Message\Authentication;
+
+use Http\Message\Authentication;
+use Http\Message\RequestMatcher\CallbackRequestMatcher;
+use Psr\Http\Message\RequestInterface;
+
+@trigger_error('The '.__NAMESPACE__.'\Matching class is deprecated since version 1.2 and will be removed in 2.0. Use Http\Message\Authentication\RequestConditional instead.', E_USER_DEPRECATED);
+
+/**
+ * Authenticate a PSR-7 Request if the request is matching.
+ *
+ * @author Márk Sági-Kazár <mark.sagikazar@gmail.com>
+ *
+ * @deprecated since since version 1.2, and will be removed in 2.0. Use {@link RequestConditional} instead.
+ */
+final class Matching implements Authentication
+{
+    /**
+     * @var Authentication
+     */
+    private $authentication;
+
+    /**
+     * @var CallbackRequestMatcher
+     */
+    private $matcher;
+
+    public function __construct(Authentication $authentication, callable $matcher = null)
+    {
+        if (is_null($matcher)) {
+            $matcher = function () {
+                return true;
+            };
+        }
+
+        $this->authentication = $authentication;
+        $this->matcher = new CallbackRequestMatcher($matcher);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function authenticate(RequestInterface $request)
+    {
+        if ($this->matcher->matches($request)) {
+            return $this->authentication->authenticate($request);
+        }
+
+        return $request;
+    }
+
+    /**
+     * Creates a matching authentication for an URL.
+     *
+     * @param string $url
+     *
+     * @return self
+     */
+    public static function createUrlMatcher(Authentication $authentication, $url)
+    {
+        $matcher = function (RequestInterface $request) use ($url) {
+            return preg_match($url, $request->getRequestTarget());
+        };
+
+        return new static($authentication, $matcher);
+    }
+}
--- a/modules/paynow/vendor/php-http/message/src/Authentication/QueryParam.php
+++ b/modules/paynow/vendor/php-http/message/src/Authentication/QueryParam.php
@@ -0,0 +1,47 @@
+<?php
+
+namespace Http\Message\Authentication;
+
+use Http\Message\Authentication;
+use Psr\Http\Message\RequestInterface;
+
+/**
+ * Authenticate a PSR-7 Request by adding parameters to its query.
+ *
+ * Note: Although in some cases it can be useful, we do not recommend using query parameters for authentication.
+ * Credentials in the URL is generally unsafe as they are not encrypted, anyone can see them.
+ *
+ * @author Márk Sági-Kazár <mark.sagikazar@gmail.com>
+ */
+final class QueryParam implements Authentication
+{
+    /**
+     * @var array
+     */
+    private $params = [];
+
+    public function __construct(array $params)
+    {
+        $this->params = $params;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function authenticate(RequestInterface $request)
+    {
+        $uri = $request->getUri();
+        $query = $uri->getQuery();
+        $params = [];
+
+        parse_str($query, $params);
+
+        $params = array_merge($params, $this->params);
+
+        $query = http_build_query($params, '', '&');
+
+        $uri = $uri->withQuery($query);
+
+        return $request->withUri($uri);
+    }
+}
--- a/modules/paynow/vendor/php-http/message/src/Authentication/RequestConditional.php
+++ b/modules/paynow/vendor/php-http/message/src/Authentication/RequestConditional.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace Http\Message\Authentication;
+
+use Http\Message\Authentication;
+use Http\Message\RequestMatcher;
+use Psr\Http\Message\RequestInterface;
+
+/**
+ * Authenticate a PSR-7 Request if the request is matching the given request matcher.
+ *
+ * @author Márk Sági-Kazár <mark.sagikazar@gmail.com>
+ */
+final class RequestConditional implements Authentication
+{
+    /**
+     * @var RequestMatcher
+     */
+    private $requestMatcher;
+
+    /**
+     * @var Authentication
+     */
+    private $authentication;
+
+    public function __construct(RequestMatcher $requestMatcher, Authentication $authentication)
+    {
+        $this->requestMatcher = $requestMatcher;
+        $this->authentication = $authentication;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function authenticate(RequestInterface $request)
+    {
+        if ($this->requestMatcher->matches($request)) {
+            return $this->authentication->authenticate($request);
+        }
+
+        return $request;
+    }
+}
--- a/modules/paynow/vendor/php-http/message/src/Authentication/Wsse.php
+++ b/modules/paynow/vendor/php-http/message/src/Authentication/Wsse.php
@@ -0,0 +1,68 @@
+<?php
+
+namespace Http\Message\Authentication;
+
+use Http\Message\Authentication;
+use InvalidArgumentException;
+use Psr\Http\Message\RequestInterface;
+
+/**
+ * Authenticate a PSR-7 Request using WSSE.
+ *
+ * @author Márk Sági-Kazár <mark.sagikazar@gmail.com>
+ */
+final class Wsse implements Authentication
+{
+    /**
+     * @var string
+     */
+    private $username;
+
+    /**
+     * @var string
+     */
+    private $password;
+
+    /**
+     * @var string
+     */
+    private $hashAlgorithm;
+
+    /**
+     * @param string $username
+     * @param string $password
+     * @param string $hashAlgorithm To use a better hashing algorithm than the weak sha1, pass the algorithm to use, e.g. "sha512"
+     */
+    public function __construct($username, $password, $hashAlgorithm = 'sha1')
+    {
+        $this->username = $username;
+        $this->password = $password;
+        if (false === in_array($hashAlgorithm, hash_algos())) {
+            throw new InvalidArgumentException(sprintf('Unaccepted hashing algorithm: %s', $hashAlgorithm));
+        }
+        $this->hashAlgorithm = $hashAlgorithm;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function authenticate(RequestInterface $request)
+    {
+        $nonce = substr(md5(uniqid(uniqid().'_', true)), 0, 16);
+        $created = date('c');
+        $digest = base64_encode(hash($this->hashAlgorithm, base64_decode($nonce).$created.$this->password, true));
+
+        $wsse = sprintf(
+            'UsernameToken Username="%s", PasswordDigest="%s", Nonce="%s", Created="%s"',
+            $this->username,
+            $digest,
+            $nonce,
+            $created
+        );
+
+        return $request
+            ->withHeader('Authorization', 'WSSE profile="UsernameToken"')
+            ->withHeader('X-WSSE', $wsse)
+        ;
+    }
+}
--- a/modules/paynow/vendor/php-http/message/src/Authentication/index.php
+++ b/modules/paynow/vendor/php-http/message/src/Authentication/index.php
@@ -0,0 +1,11 @@
+<?php
+
+header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
+header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
+
+header('Cache-Control: no-store, no-cache, must-revalidate');
+header('Cache-Control: post-check=0, pre-check=0', false);
+header('Pragma: no-cache');
+
+header('Location: ../');
+exit;
--- a/modules/paynow/vendor/php-http/message/src/Builder/ResponseBuilder.php
+++ b/modules/paynow/vendor/php-http/message/src/Builder/ResponseBuilder.php
@@ -0,0 +1,146 @@
+<?php
+
+namespace Http\Message\Builder;
+
+use Psr\Http\Message\ResponseInterface;
+
+/**
+ * Fills response object with values.
+ */
+class ResponseBuilder
+{
+    /**
+     * The response to be built.
+     *
+     * @var ResponseInterface
+     */
+    protected $response;
+
+    /**
+     * Create builder for the given response.
+     */
+    public function __construct(ResponseInterface $response)
+    {
+        $this->response = $response;
+    }
+
+    /**
+     * Return response.
+     *
+     * @return ResponseInterface
+     */
+    public function getResponse()
+    {
+        return $this->response;
+    }
+
+    /**
+     * Add headers represented by an array of header lines.
+     *
+     * @param string[] $headers response headers as array of header lines
+     *
+     * @return $this
+     *
+     * @throws \UnexpectedValueException for invalid header values
+     * @throws \InvalidArgumentException for invalid status code arguments
+     */
+    public function setHeadersFromArray(array $headers)
+    {
+        $status = array_shift($headers);
+        $this->setStatus($status);
+
+        foreach ($headers as $headerLine) {
+            $headerLine = trim($headerLine);
+            if ('' === $headerLine) {
+                continue;
+            }
+
+            $this->addHeader($headerLine);
+        }
+
+        return $this;
+    }
+
+    /**
+     * Add headers represented by a single string.
+     *
+     * @param string $headers response headers as single string
+     *
+     * @return $this
+     *
+     * @throws \InvalidArgumentException if $headers is not a string on object with __toString()
+     * @throws \UnexpectedValueException for invalid header values
+     */
+    public function setHeadersFromString($headers)
+    {
+        if (!(is_string($headers)
+            || (is_object($headers) && method_exists($headers, '__toString')))
+        ) {
+            throw new \InvalidArgumentException(
+                sprintf(
+                    '%s expects parameter 1 to be a string, %s given',
+                    __METHOD__,
+                    is_object($headers) ? get_class($headers) : gettype($headers)
+                )
+            );
+        }
+
+        $this->setHeadersFromArray(explode("\r\n", $headers));
+
+        return $this;
+    }
+
+    /**
+     * Set response status from a status string.
+     *
+     * @param string $statusLine response status as a string
+     *
+     * @return $this
+     *
+     * @throws \InvalidArgumentException for invalid status line
+     */
+    public function setStatus($statusLine)
+    {
+        $parts = explode(' ', $statusLine, 3);
+        if (count($parts) < 2 || 0 !== strpos(strtolower($parts[0]), 'http/')) {
+            throw new \InvalidArgumentException(
+                sprintf('"%s" is not a valid HTTP status line', $statusLine)
+            );
+        }
+
+        $reasonPhrase = count($parts) > 2 ? $parts[2] : '';
+        $this->response = $this->response
+            ->withStatus((int) $parts[1], $reasonPhrase)
+            ->withProtocolVersion(substr($parts[0], 5));
+
+        return $this;
+    }
+
+    /**
+     * Add header represented by a string.
+     *
+     * @param string $headerLine response header as a string
+     *
+     * @return $this
+     *
+     * @throws \InvalidArgumentException for invalid header names or values
+     */
+    public function addHeader($headerLine)
+    {
+        $parts = explode(':', $headerLine, 2);
+        if (2 !== count($parts)) {
+            throw new \InvalidArgumentException(
+                sprintf('"%s" is not a valid HTTP header line', $headerLine)
+            );
+        }
+        $name = trim($parts[0]);
+        $value = trim($parts[1]);
+        if ($this->response->hasHeader($name)) {
+            $this->response = $this->response->withAddedHeader($name, $value);
+        } else {
+            $this->response = $this->response->withHeader($name, $value);
+        }
+
+        return $this;
+    }
+}
--- a/modules/paynow/vendor/php-http/message/src/Builder/index.php
+++ b/modules/paynow/vendor/php-http/message/src/Builder/index.php
@@ -0,0 +1,11 @@
+<?php
+
+header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
+header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
+
+header('Cache-Control: no-store, no-cache, must-revalidate');
+header('Cache-Control: post-check=0, pre-check=0', false);
+header('Pragma: no-cache');
+
+header('Location: ../');
+exit;
--- a/modules/paynow/vendor/php-http/message/src/Cookie.php
+++ b/modules/paynow/vendor/php-http/message/src/Cookie.php
@@ -0,0 +1,524 @@
+<?php
+
+namespace Http\Message;
+
+/**
+ * Cookie Value Object.
+ *
+ * @author Márk Sági-Kazár <mark.sagikazar@gmail.com>
+ *
+ * @see http://tools.ietf.org/search/rfc6265
+ */
+final class Cookie
+{
+    /**
+     * @var string
+     */
+    private $name;
+
+    /**
+     * @var string|null
+     */
+    private $value;
+
+    /**
+     * @var int|null
+     */
+    private $maxAge;
+
+    /**
+     * @var string|null
+     */
+    private $domain;
+
+    /**
+     * @var string
+     */
+    private $path;
+
+    /**
+     * @var bool
+     */
+    private $secure;
+
+    /**
+     * @var bool
+     */
+    private $httpOnly;
+
+    /**
+     * Expires attribute is HTTP 1.0 only and should be avoided.
+     *
+     * @var \DateTime|null
+     */
+    private $expires;
+
+    /**
+     * @param string         $name
+     * @param string|null    $value
+     * @param int|null       $maxAge
+     * @param string|null    $domain
+     * @param string|null    $path
+     * @param bool           $secure
+     * @param bool           $httpOnly
+     * @param \DateTime|null $expires  Expires attribute is HTTP 1.0 only and should be avoided.
+     *
+     * @throws \InvalidArgumentException if name, value or max age is not valid
+     */
+    public function __construct(
+        $name,
+        $value = null,
+        $maxAge = null,
+        $domain = null,
+        $path = null,
+        $secure = false,
+        $httpOnly = false,
+        \DateTime $expires = null
+    ) {
+        $this->validateName($name);
+        $this->validateValue($value);
+        $this->validateMaxAge($maxAge);
+
+        $this->name = $name;
+        $this->value = $value;
+        $this->maxAge = $maxAge;
+        $this->expires = $expires;
+        $this->domain = $this->normalizeDomain($domain);
+        $this->path = $this->normalizePath($path);
+        $this->secure = (bool) $secure;
+        $this->httpOnly = (bool) $httpOnly;
+    }
+
+    /**
+     * Creates a new cookie without any attribute validation.
+     *
+     * @param string         $name
+     * @param string|null    $value
+     * @param int            $maxAge
+     * @param string|null    $domain
+     * @param string|null    $path
+     * @param bool           $secure
+     * @param bool           $httpOnly
+     * @param \DateTime|null $expires  Expires attribute is HTTP 1.0 only and should be avoided.
+     */
+    public static function createWithoutValidation(
+        $name,
+        $value = null,
+        $maxAge = null,
+        $domain = null,
+        $path = null,
+        $secure = false,
+        $httpOnly = false,
+        \DateTime $expires = null
+    ) {
+        $cookie = new self('name', null, null, $domain, $path, $secure, $httpOnly, $expires);
+        $cookie->name = $name;
+        $cookie->value = $value;
+        $cookie->maxAge = $maxAge;
+
+        return $cookie;
+    }
+
+    /**
+     * Returns the name.
+     *
+     * @return string
+     */
+    public function getName()
+    {
+        return $this->name;
+    }
+
+    /**
+     * Returns the value.
+     *
+     * @return string|null
+     */
+    public function getValue()
+    {
+        return $this->value;
+    }
+
+    /**
+     * Checks if there is a value.
+     *
+     * @return bool
+     */
+    public function hasValue()
+    {
+        return isset($this->value);
+    }
+
+    /**
+     * Sets the value.
+     *
+     * @param string|null $value
+     *
+     * @return Cookie
+     */
+    public function withValue($value)
+    {
+        $this->validateValue($value);
+
+        $new = clone $this;
+        $new->value = $value;
+
+        return $new;
+    }
+
+    /**
+     * Returns the max age.
+     *
+     * @return int|null
+     */
+    public function getMaxAge()
+    {
+        return $this->maxAge;
+    }
+
+    /**
+     * Checks if there is a max age.
+     *
+     * @return bool
+     */
+    public function hasMaxAge()
+    {
+        return isset($this->maxAge);
+    }
+
+    /**
+     * Sets the max age.
+     *
+     * @param int|null $maxAge
+     *
+     * @return Cookie
+     */
+    public function withMaxAge($maxAge)
+    {
+        $this->validateMaxAge($maxAge);
+
+        $new = clone $this;
+        $new->maxAge = $maxAge;
+
+        return $new;
+    }
+
+    /**
+     * Returns the expiration time.
+     *
+     * @return \DateTime|null
+     */
+    public function getExpires()
+    {
+        return $this->expires;
+    }
+
+    /**
+     * Checks if there is an expiration time.
+     *
+     * @return bool
+     */
+    public function hasExpires()
+    {
+        return isset($this->expires);
+    }
+
+    /**
+     * Sets the expires.
+     *
+     * @return Cookie
+     */
+    public function withExpires(\DateTime $expires = null)
+    {
+        $new = clone $this;
+        $new->expires = $expires;
+
+        return $new;
+    }
+
+    /**
+     * Checks if the cookie is expired.
+     *
+     * @return bool
+     */
+    public function isExpired()
+    {
+        return isset($this->expires) and $this->expires < new \DateTime();
+    }
+
+    /**
+     * Returns the domain.
+     *
+     * @return string|null
+     */
+    public function getDomain()
+    {
+        return $this->domain;
+    }
+
+    /**
+     * Checks if there is a domain.
+     *
+     * @return bool
+     */
+    public function hasDomain()
+    {
+        return isset($this->domain);
+    }
+
+    /**
+     * Sets the domain.
+     *
+     * @param string|null $domain
+     *
+     * @return Cookie
+     */
+    public function withDomain($domain)
+    {
+        $new = clone $this;
+        $new->domain = $this->normalizeDomain($domain);
+
+        return $new;
+    }
+
+    /**
+     * Checks whether this cookie is meant for this domain.
+     *
+     * @see http://tools.ietf.org/html/rfc6265#section-5.1.3
+     *
+     * @param string $domain
+     *
+     * @return bool
+     */
+    public function matchDomain($domain)
+    {
+        // Domain is not set or exact match
+        if (!$this->hasDomain() || 0 === strcasecmp($domain, $this->domain)) {
+            return true;
+        }
+
+        // Domain is not an IP address
+        if (filter_var($domain, FILTER_VALIDATE_IP)) {
+            return false;
+        }
+
+        return (bool) preg_match(sprintf('/\b%s$/i', preg_quote($this->domain)), $domain);
+    }
+
+    /**
+     * Returns the path.
+     *
+     * @return string
+     */
+    public function getPath()
+    {
+        return $this->path;
+    }
+
+    /**
+     * Sets the path.
+     *
+     * @param string|null $path
+     *
+     * @return Cookie
+     */
+    public function withPath($path)
+    {
+        $new = clone $this;
+        $new->path = $this->normalizePath($path);
+
+        return $new;
+    }
+
+    /**
+     * Checks whether this cookie is meant for this path.
+     *
+     * @see http://tools.ietf.org/html/rfc6265#section-5.1.4
+     *
+     * @param string $path
+     *
+     * @return bool
+     */
+    public function matchPath($path)
+    {
+        return $this->path === $path || (0 === strpos($path, rtrim($this->path, '/').'/'));
+    }
+
+    /**
+     * Checks whether this cookie may only be sent over HTTPS.
+     *
+     * @return bool
+     */
+    public function isSecure()
+    {
+        return $this->secure;
+    }
+
+    /**
+     * Sets whether this cookie should only be sent over HTTPS.
+     *
+     * @param bool $secure
+     *
+     * @return Cookie
+     */
+    public function withSecure($secure)
+    {
+        $new = clone $this;
+        $new->secure = (bool) $secure;
+
+        return $new;
+    }
+
+    /**
+     * Check whether this cookie may not be accessed through Javascript.
+     *
+     * @return bool
+     */
+    public function isHttpOnly()
+    {
+        return $this->httpOnly;
+    }
+
+    /**
+     * Sets whether this cookie may not be accessed through Javascript.
+     *
+     * @param bool $httpOnly
+     *
+     * @return Cookie
+     */
+    public function withHttpOnly($httpOnly)
+    {
+        $new = clone $this;
+        $new->httpOnly = (bool) $httpOnly;
+
+        return $new;
+    }
+
+    /**
+     * Checks if this cookie represents the same cookie as $cookie.
+     *
+     * This does not compare the values, only name, domain and path.
+     *
+     * @param Cookie $cookie
+     *
+     * @return bool
+     */
+    public function match(self $cookie)
+    {
+        return $this->name === $cookie->name && $this->domain === $cookie->domain and $this->path === $cookie->path;
+    }
+
+    /**
+     * Validates cookie attributes.
+     *
+     * @return bool
+     */
+    public function isValid()
+    {
+        try {
+            $this->validateName($this->name);
+            $this->validateValue($this->value);
+            $this->validateMaxAge($this->maxAge);
+        } catch (\InvalidArgumentException $e) {
+            return false;
+        }
+
+        return true;
+    }
+
+    /**
+     * Validates the name attribute.
+     *
+     * @see http://tools.ietf.org/search/rfc2616#section-2.2
+     *
+     * @param string $name
+     *
+     * @throws \InvalidArgumentException if the name is empty or contains invalid characters
+     */
+    private function validateName($name)
+    {
+        if (strlen($name) < 1) {
+            throw new \InvalidArgumentException('The name cannot be empty');
+        }
+
+        // Name attribute is a token as per spec in RFC 2616
+        if (preg_match('/[\x00-\x20\x22\x28-\x29\x2C\x2F\x3A-\x40\x5B-\x5D\x7B\x7D\x7F]/', $name)) {
+            throw new \InvalidArgumentException(sprintf('The cookie name "%s" contains invalid characters.', $name));
+        }
+    }
+
+    /**
+     * Validates a value.
+     *
+     * @see http://tools.ietf.org/html/rfc6265#section-4.1.1
+     *
+     * @param string|null $value
+     *
+     * @throws \InvalidArgumentException if the value contains invalid characters
+     */
+    private function validateValue($value)
+    {
+        if (isset($value)) {
+            if (preg_match('/[^\x21\x23-\x2B\x2D-\x3A\x3C-\x5B\x5D-\x7E]/', $value)) {
+                throw new \InvalidArgumentException(sprintf('The cookie value "%s" contains invalid characters.', $value));
+            }
+        }
+    }
+
+    /**
+     * Validates a Max-Age attribute.
+     *
+     * @param int|null $maxAge
+     *
+     * @throws \InvalidArgumentException if the Max-Age is not an empty or integer value
+     */
+    private function validateMaxAge($maxAge)
+    {
+        if (isset($maxAge)) {
+            if (!is_int($maxAge)) {
+                throw new \InvalidArgumentException('Max-Age must be integer');
+            }
+        }
+    }
+
+    /**
+     * Remove the leading '.' and lowercase the domain as per spec in RFC 6265.
+     *
+     * @see http://tools.ietf.org/html/rfc6265#section-4.1.2.3
+     * @see http://tools.ietf.org/html/rfc6265#section-5.1.3
+     * @see http://tools.ietf.org/html/rfc6265#section-5.2.3
+     *
+     * @param string|null $domain
+     *
+     * @return string
+     */
+    private function normalizeDomain($domain)
+    {
+        if (isset($domain)) {
+            $domain = ltrim(strtolower($domain), '.');
+        }
+
+        return $domain;
+    }
+
+    /**
+     * Processes path as per spec in RFC 6265.
+     *
+     * @see http://tools.ietf.org/html/rfc6265#section-5.1.4
+     * @see http://tools.ietf.org/html/rfc6265#section-5.2.4
+     *
+     * @param string|null $path
+     *
+     * @return string
+     */
+    private function normalizePath($path)
+    {
+        $path = rtrim($path, '/');
+
+        if (empty($path) or '/' !== substr($path, 0, 1)) {
+            $path = '/';
+        }
+
+        return $path;
+    }
+}
--- a/modules/paynow/vendor/php-http/message/src/CookieJar.php
+++ b/modules/paynow/vendor/php-http/message/src/CookieJar.php
@@ -0,0 +1,212 @@
+<?php
+
+namespace Http\Message;
+
+/**
+ * Cookie Jar holds a set of Cookies.
+ *
+ * @author Márk Sági-Kazár <mark.sagikazar@gmail.com>
+ */
+final class CookieJar implements \Countable, \IteratorAggregate
+{
+    /**
+     * @var \SplObjectStorage<object, mixed>
+     */
+    private $cookies;
+
+    public function __construct()
+    {
+        $this->cookies = new \SplObjectStorage();
+    }
+
+    /**
+     * Checks if there is a cookie.
+     *
+     * @return bool
+     */
+    public function hasCookie(Cookie $cookie)
+    {
+        return $this->cookies->contains($cookie);
+    }
+
+    /**
+     * Adds a cookie.
+     */
+    public function addCookie(Cookie $cookie)
+    {
+        if (!$this->hasCookie($cookie)) {
+            $cookies = $this->getMatchingCookies($cookie);
+
+            foreach ($cookies as $matchingCookie) {
+                if ($cookie->getValue() !== $matchingCookie->getValue() || $cookie->getMaxAge() > $matchingCookie->getMaxAge()) {
+                    $this->removeCookie($matchingCookie);
+
+                    continue;
+                }
+            }
+
+            if ($cookie->hasValue()) {
+                $this->cookies->attach($cookie);
+            }
+        }
+    }
+
+    /**
+     * Removes a cookie.
+     */
+    public function removeCookie(Cookie $cookie)
+    {
+        $this->cookies->detach($cookie);
+    }
+
+    /**
+     * Returns the cookies.
+     *
+     * @return Cookie[]
+     */
+    public function getCookies()
+    {
+        $match = function ($matchCookie) {
+            return true;
+        };
+
+        return $this->findMatchingCookies($match);
+    }
+
+    /**
+     * Returns all matching cookies.
+     *
+     * @return Cookie[]
+     */
+    public function getMatchingCookies(Cookie $cookie)
+    {
+        $match = function ($matchCookie) use ($cookie) {
+            return $matchCookie->match($cookie);
+        };
+
+        return $this->findMatchingCookies($match);
+    }
+
+    /**
+     * Finds matching cookies based on a callable.
+     *
+     * @return Cookie[]
+     */
+    private function findMatchingCookies(callable $match)
+    {
+        $cookies = [];
+
+        foreach ($this->cookies as $cookie) {
+            if ($match($cookie)) {
+                $cookies[] = $cookie;
+            }
+        }
+
+        return $cookies;
+    }
+
+    /**
+     * Checks if there are cookies.
+     *
+     * @return bool
+     */
+    public function hasCookies()
+    {
+        return $this->cookies->count() > 0;
+    }
+
+    /**
+     * Sets the cookies and removes any previous one.
+     *
+     * @param Cookie[] $cookies
+     */
+    public function setCookies(array $cookies)
+    {
+        $this->clear();
+        $this->addCookies($cookies);
+    }
+
+    /**
+     * Adds some cookies.
+     *
+     * @param Cookie[] $cookies
+     */
+    public function addCookies(array $cookies)
+    {
+        foreach ($cookies as $cookie) {
+            $this->addCookie($cookie);
+        }
+    }
+
+    /**
+     * Removes some cookies.
+     *
+     * @param Cookie[] $cookies
+     */
+    public function removeCookies(array $cookies)
+    {
+        foreach ($cookies as $cookie) {
+            $this->removeCookie($cookie);
+        }
+    }
+
+    /**
+     * Removes cookies which match the given parameters.
+     *
+     * Null means that parameter should not be matched
+     *
+     * @param string|null $name
+     * @param string|null $domain
+     * @param string|null $path
+     */
+    public function removeMatchingCookies($name = null, $domain = null, $path = null)
+    {
+        $match = function ($cookie) use ($name, $domain, $path) {
+            $match = true;
+
+            if (isset($name)) {
+                $match = $match && ($cookie->getName() === $name);
+            }
+
+            if (isset($domain)) {
+                $match = $match && $cookie->matchDomain($domain);
+            }
+
+            if (isset($path)) {
+                $match = $match && $cookie->matchPath($path);
+            }
+
+            return $match;
+        };
+
+        $cookies = $this->findMatchingCookies($match);
+
+        $this->removeCookies($cookies);
+    }
+
+    /**
+     * Removes all cookies.
+     */
+    public function clear()
+    {
+        $this->cookies = new \SplObjectStorage();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    #[\ReturnTypeWillChange]
+    public function count()
+    {
+        return $this->cookies->count();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    #[\ReturnTypeWillChange]
+    public function getIterator()
+    {
+        return clone $this->cookies;
+    }
+}
--- a/modules/paynow/vendor/php-http/message/src/CookieUtil.php
+++ b/modules/paynow/vendor/php-http/message/src/CookieUtil.php
@@ -0,0 +1,53 @@
+<?php
+
+namespace Http\Message;
+
+use Http\Message\Exception\UnexpectedValueException;
+
+final class CookieUtil
+{
+    /**
+     * Handles dates as defined by RFC 2616 section 3.3.1, and also some other
+     * non-standard, but common formats.
+     *
+     * @var array
+     */
+    private static $dateFormats = [
+        'D, d M y H:i:s T',
+        'D, d M Y H:i:s T',
+        'D, d-M-y H:i:s T',
+        'D, d-M-Y H:i:s T',
+        'D, d-m-y H:i:s T',
+        'D, d-m-Y H:i:s T',
+        'D M j G:i:s Y',
+        'D M d H:i:s Y T',
+    ];
+
+    /**
+     * @see https://github.com/symfony/symfony/blob/master/src/Symfony/Component/BrowserKit/Cookie.php
+     *
+     * @param string $dateValue
+     *
+     * @return \DateTime
+     *
+     * @throws UnexpectedValueException if we cannot parse the cookie date string
+     */
+    public static function parseDate($dateValue)
+    {
+        foreach (self::$dateFormats as $dateFormat) {
+            if (false !== $date = \DateTime::createFromFormat($dateFormat, $dateValue, new \DateTimeZone('GMT'))) {
+                return $date;
+            }
+        }
+
+        // attempt a fallback for unusual formatting
+        if (false !== $date = date_create($dateValue, new \DateTimeZone('GMT'))) {
+            return $date;
+        }
+
+        throw new UnexpectedValueException(sprintf(
+            'Unparseable cookie date string "%s"',
+            $dateValue
+        ));
+    }
+}
--- a/modules/paynow/vendor/php-http/message/src/Decorator/MessageDecorator.php
+++ b/modules/paynow/vendor/php-http/message/src/Decorator/MessageDecorator.php
@@ -0,0 +1,133 @@
+<?php
+
+namespace Http\Message\Decorator;
+
+use Psr\Http\Message\MessageInterface;
+use Psr\Http\Message\StreamInterface;
+
+/**
+ * @author Márk Sági-Kazár <mark.sagikazar@gmail.com>
+ */
+trait MessageDecorator
+{
+    /**
+     * @var MessageInterface
+     */
+    private $message;
+
+    /**
+     * Returns the decorated message.
+     *
+     * Since the underlying Message is immutable as well
+     * exposing it is not an issue, because it's state cannot be altered
+     *
+     * @return MessageInterface
+     */
+    public function getMessage()
+    {
+        return $this->message;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getProtocolVersion()
+    {
+        return $this->message->getProtocolVersion();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function withProtocolVersion($version)
+    {
+        $new = clone $this;
+        $new->message = $this->message->withProtocolVersion($version);
+
+        return $new;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getHeaders()
+    {
+        return $this->message->getHeaders();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function hasHeader($header)
+    {
+        return $this->message->hasHeader($header);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getHeader($header)
+    {
+        return $this->message->getHeader($header);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getHeaderLine($header)
+    {
+        return $this->message->getHeaderLine($header);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function withHeader($header, $value)
+    {
+        $new = clone $this;
+        $new->message = $this->message->withHeader($header, $value);
+
+        return $new;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function withAddedHeader($header, $value)
+    {
+        $new = clone $this;
+        $new->message = $this->message->withAddedHeader($header, $value);
+
+        return $new;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function withoutHeader($header)
+    {
+        $new = clone $this;
+        $new->message = $this->message->withoutHeader($header);
+
+        return $new;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getBody()
+    {
+        return $this->message->getBody();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function withBody(StreamInterface $body)
+    {
+        $new = clone $this;
+        $new->message = $this->message->withBody($body);
+
+        return $new;
+    }
+}
--- a/modules/paynow/vendor/php-http/message/src/Decorator/RequestDecorator.php
+++ b/modules/paynow/vendor/php-http/message/src/Decorator/RequestDecorator.php
@@ -0,0 +1,86 @@
+<?php
+
+namespace Http\Message\Decorator;
+
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\UriInterface;
+
+/**
+ * @author Márk Sági-Kazár <mark.sagikazar@gmail.com>
+ */
+trait RequestDecorator
+{
+    use MessageDecorator {
+        getMessage as getRequest;
+    }
+
+    /**
+     * Exchanges the underlying request with another.
+     *
+     * @return self
+     */
+    public function withRequest(RequestInterface $request)
+    {
+        $new = clone $this;
+        $new->message = $request;
+
+        return $new;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getRequestTarget()
+    {
+        return $this->message->getRequestTarget();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function withRequestTarget($requestTarget)
+    {
+        $new = clone $this;
+        $new->message = $this->message->withRequestTarget($requestTarget);
+
+        return $new;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getMethod()
+    {
+        return $this->message->getMethod();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function withMethod($method)
+    {
+        $new = clone $this;
+        $new->message = $this->message->withMethod($method);
+
+        return $new;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getUri()
+    {
+        return $this->message->getUri();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function withUri(UriInterface $uri, $preserveHost = false)
+    {
+        $new = clone $this;
+        $new->message = $this->message->withUri($uri, $preserveHost);
+
+        return $new;
+    }
+}
--- a/modules/paynow/vendor/php-http/message/src/Decorator/ResponseDecorator.php
+++ b/modules/paynow/vendor/php-http/message/src/Decorator/ResponseDecorator.php
@@ -0,0 +1,55 @@
+<?php
+
+namespace Http\Message\Decorator;
+
+use Psr\Http\Message\ResponseInterface;
+
+/**
+ * @author Márk Sági-Kazár <mark.sagikazar@gmail.com>
+ */
+trait ResponseDecorator
+{
+    use MessageDecorator {
+        getMessage as getResponse;
+    }
+
+    /**
+     * Exchanges the underlying response with another.
+     *
+     * @return self
+     */
+    public function withResponse(ResponseInterface $response)
+    {
+        $new = clone $this;
+        $new->message = $response;
+
+        return $new;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getStatusCode()
+    {
+        return $this->message->getStatusCode();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function withStatus($code, $reasonPhrase = '')
+    {
+        $new = clone $this;
+        $new->message = $this->message->withStatus($code, $reasonPhrase);
+
+        return $new;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getReasonPhrase()
+    {
+        return $this->message->getReasonPhrase();
+    }
+}
--- a/modules/paynow/vendor/php-http/message/src/Decorator/StreamDecorator.php
+++ b/modules/paynow/vendor/php-http/message/src/Decorator/StreamDecorator.php
@@ -0,0 +1,138 @@
+<?php
+
+namespace Http\Message\Decorator;
+
+use Psr\Http\Message\StreamInterface;
+
+/**
+ * Decorates a stream.
+ *
+ * @author Márk Sági-Kazár <mark.sagikazar@gmail.com>
+ */
+trait StreamDecorator
+{
+    /**
+     * @var StreamInterface
+     */
+    protected $stream;
+
+    /**
+     * {@inheritdoc}
+     */
+    public function __toString()
+    {
+        return $this->stream->__toString();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function close()
+    {
+        $this->stream->close();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function detach()
+    {
+        return $this->stream->detach();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getSize()
+    {
+        return $this->stream->getSize();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function tell()
+    {
+        return $this->stream->tell();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function eof()
+    {
+        return $this->stream->eof();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function isSeekable()
+    {
+        return $this->stream->isSeekable();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function seek($offset, $whence = SEEK_SET)
+    {
+        $this->stream->seek($offset, $whence);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function rewind()
+    {
+        $this->stream->rewind();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function isWritable()
+    {
+        return $this->stream->isWritable();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function write($string)
+    {
+        return $this->stream->write($string);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function isReadable()
+    {
+        return $this->stream->isReadable();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function read($length)
+    {
+        return $this->stream->read($length);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getContents()
+    {
+        return $this->stream->getContents();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getMetadata($key = null)
+    {
+        return $this->stream->getMetadata($key);
+    }
+}
--- a/modules/paynow/vendor/php-http/message/src/Decorator/index.php
+++ b/modules/paynow/vendor/php-http/message/src/Decorator/index.php
@@ -0,0 +1,11 @@
+<?php
+
+header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
+header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
+
+header('Cache-Control: no-store, no-cache, must-revalidate');
+header('Cache-Control: post-check=0, pre-check=0', false);
+header('Pragma: no-cache');
+
+header('Location: ../');
+exit;
--- a/modules/paynow/vendor/php-http/message/src/Encoding/ChunkStream.php
+++ b/modules/paynow/vendor/php-http/message/src/Encoding/ChunkStream.php
@@ -0,0 +1,39 @@
+<?php
+
+namespace Http\Message\Encoding;
+
+/**
+ * Transform a regular stream into a chunked one.
+ *
+ * @author Joel Wurtz <joel.wurtz@gmail.com>
+ */
+class ChunkStream extends FilteredStream
+{
+    /**
+     * {@inheritdoc}
+     */
+    protected function readFilter()
+    {
+        return 'chunk';
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function writeFilter()
+    {
+        return 'dechunk';
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function fill()
+    {
+        parent::fill();
+
+        if ($this->stream->eof()) {
+            $this->buffer .= "0\r\n\r\n";
+        }
+    }
+}
--- a/modules/paynow/vendor/php-http/message/src/Encoding/CompressStream.php
+++ b/modules/paynow/vendor/php-http/message/src/Encoding/CompressStream.php
@@ -0,0 +1,45 @@
+<?php
+
+namespace Http\Message\Encoding;
+
+use Clue\StreamFilter as Filter;
+use Psr\Http\Message\StreamInterface;
+
+/**
+ * Stream compress (RFC 1950).
+ *
+ * @author Joel Wurtz <joel.wurtz@gmail.com>
+ */
+class CompressStream extends FilteredStream
+{
+    /**
+     * @param int $level
+     */
+    public function __construct(StreamInterface $stream, $level = -1)
+    {
+        if (!extension_loaded('zlib')) {
+            throw new \RuntimeException('The zlib extension must be enabled to use this stream');
+        }
+
+        parent::__construct($stream, ['window' => 15, 'level' => $level]);
+
+        // @deprecated will be removed in 2.0
+        $this->writeFilterCallback = Filter\fun($this->writeFilter(), ['window' => 15]);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function readFilter()
+    {
+        return 'zlib.deflate';
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function writeFilter()
+    {
+        return 'zlib.inflate';
+    }
+}
--- a/modules/paynow/vendor/php-http/message/src/Encoding/DechunkStream.php
+++ b/modules/paynow/vendor/php-http/message/src/Encoding/DechunkStream.php
@@ -0,0 +1,29 @@
+<?php
+
+namespace Http\Message\Encoding;
+
+/**
+ * Decorate a stream which is chunked.
+ *
+ * Allow to decode a chunked stream
+ *
+ * @author Joel Wurtz <joel.wurtz@gmail.com>
+ */
+class DechunkStream extends FilteredStream
+{
+    /**
+     * {@inheritdoc}
+     */
+    protected function readFilter()
+    {
+        return 'dechunk';
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function writeFilter()
+    {
+        return 'chunk';
+    }
+}
--- a/modules/paynow/vendor/php-http/message/src/Encoding/DecompressStream.php
+++ b/modules/paynow/vendor/php-http/message/src/Encoding/DecompressStream.php
@@ -0,0 +1,45 @@
+<?php
+
+namespace Http\Message\Encoding;
+
+use Clue\StreamFilter as Filter;
+use Psr\Http\Message\StreamInterface;
+
+/**
+ * Stream decompress (RFC 1950).
+ *
+ * @author Joel Wurtz <joel.wurtz@gmail.com>
+ */
+class DecompressStream extends FilteredStream
+{
+    /**
+     * @param int $level
+     */
+    public function __construct(StreamInterface $stream, $level = -1)
+    {
+        if (!extension_loaded('zlib')) {
+            throw new \RuntimeException('The zlib extension must be enabled to use this stream');
+        }
+
+        parent::__construct($stream, ['window' => 15]);
+
+        // @deprecated will be removed in 2.0
+        $this->writeFilterCallback = Filter\fun($this->writeFilter(), ['window' => 15, 'level' => $level]);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function readFilter()
+    {
+        return 'zlib.inflate';
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function writeFilter()
+    {
+        return 'zlib.deflate';
+    }
+}
--- a/modules/paynow/vendor/php-http/message/src/Encoding/DeflateStream.php
+++ b/modules/paynow/vendor/php-http/message/src/Encoding/DeflateStream.php
@@ -0,0 +1,41 @@
+<?php
+
+namespace Http\Message\Encoding;
+
+use Clue\StreamFilter as Filter;
+use Psr\Http\Message\StreamInterface;
+
+/**
+ * Stream deflate (RFC 1951).
+ *
+ * @author Joel Wurtz <joel.wurtz@gmail.com>
+ */
+class DeflateStream extends FilteredStream
+{
+    /**
+     * @param int $level
+     */
+    public function __construct(StreamInterface $stream, $level = -1)
+    {
+        parent::__construct($stream, ['window' => -15, 'level' => $level]);
+
+        // @deprecated will be removed in 2.0
+        $this->writeFilterCallback = Filter\fun($this->writeFilter(), ['window' => -15]);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function readFilter()
+    {
+        return 'zlib.deflate';
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function writeFilter()
+    {
+        return 'zlib.inflate';
+    }
+}
--- a/modules/paynow/vendor/php-http/message/src/Encoding/Filter/Chunk.php
+++ b/modules/paynow/vendor/php-http/message/src/Encoding/Filter/Chunk.php
@@ -0,0 +1,31 @@
+<?php
+
+namespace Http\Message\Encoding\Filter;
+
+/**
+ * Userland implementation of the chunk stream filter.
+ *
+ * @author Joel Wurtz <joel.wurtz@gmail.com>
+ */
+class Chunk extends \php_user_filter
+{
+    /**
+     * {@inheritdoc}
+     */
+    #[\ReturnTypeWillChange]
+    public function filter($in, $out, &$consumed, $closing)
+    {
+        while ($bucket = stream_bucket_make_writeable($in)) {
+            $lenbucket = stream_bucket_new($this->stream, dechex($bucket->datalen)."\r\n");
+            stream_bucket_append($out, $lenbucket);
+
+            $consumed += $bucket->datalen;
+            stream_bucket_append($out, $bucket);
+
+            $lenbucket = stream_bucket_new($this->stream, "\r\n");
+            stream_bucket_append($out, $lenbucket);
+        }
+
+        return PSFS_PASS_ON;
+    }
+}
--- a/modules/paynow/vendor/php-http/message/src/Encoding/Filter/index.php
+++ b/modules/paynow/vendor/php-http/message/src/Encoding/Filter/index.php
@@ -0,0 +1,11 @@
+<?php
+
+header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
+header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
+
+header('Cache-Control: no-store, no-cache, must-revalidate');
+header('Cache-Control: post-check=0, pre-check=0', false);
+header('Pragma: no-cache');
+
+header('Location: ../');
+exit;
--- a/modules/paynow/vendor/php-http/message/src/Encoding/FilteredStream.php
+++ b/modules/paynow/vendor/php-http/message/src/Encoding/FilteredStream.php
@@ -0,0 +1,234 @@
+<?php
+
+namespace Http\Message\Encoding;
+
+use Clue\StreamFilter as Filter;
+use Http\Message\Decorator\StreamDecorator;
+use Psr\Http\Message\StreamInterface;
+
+/**
+ * A filtered stream has a filter for filtering output and a filter for filtering input made to a underlying stream.
+ *
+ * @author Joel Wurtz <joel.wurtz@gmail.com>
+ */
+abstract class FilteredStream implements StreamInterface
+{
+    use StreamDecorator {
+        rewind as private doRewind;
+        seek as private doSeek;
+    }
+    const BUFFER_SIZE = 8192;
+
+    /**
+     * @var callable
+     */
+    protected $readFilterCallback;
+
+    /**
+     * @var resource
+     *
+     * @deprecated since version 1.5, will be removed in 2.0
+     */
+    protected $readFilter;
+
+    /**
+     * @var callable
+     *
+     * @deprecated since version 1.5, will be removed in 2.0
+     */
+    protected $writeFilterCallback;
+
+    /**
+     * @var resource
+     *
+     * @deprecated since version 1.5, will be removed in 2.0
+     */
+    protected $writeFilter;
+
+    /**
+     * Internal buffer.
+     *
+     * @var string
+     */
+    protected $buffer = '';
+
+    /**
+     * @param mixed|null $readFilterOptions
+     * @param mixed|null $writeFilterOptions deprecated since 1.5, will be removed in 2.0
+     */
+    public function __construct(StreamInterface $stream, $readFilterOptions = null, $writeFilterOptions = null)
+    {
+        if (null !== $readFilterOptions) {
+            $this->readFilterCallback = Filter\fun($this->readFilter(), $readFilterOptions);
+        } else {
+            $this->readFilterCallback = Filter\fun($this->readFilter());
+        }
+
+        if (null !== $writeFilterOptions) {
+            $this->writeFilterCallback = Filter\fun($this->writeFilter(), $writeFilterOptions);
+
+            @trigger_error('The $writeFilterOptions argument is deprecated since version 1.5 and will be removed in 2.0.', E_USER_DEPRECATED);
+        } else {
+            $this->writeFilterCallback = Filter\fun($this->writeFilter());
+        }
+
+        $this->stream = $stream;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function read($length)
+    {
+        if (strlen($this->buffer) >= $length) {
+            $read = substr($this->buffer, 0, $length);
+            $this->buffer = substr($this->buffer, $length);
+
+            return $read;
+        }
+
+        if ($this->stream->eof()) {
+            $buffer = $this->buffer;
+            $this->buffer = '';
+
+            return $buffer;
+        }
+
+        $read = $this->buffer;
+        $this->buffer = '';
+        $this->fill();
+
+        return $read.$this->read($length - strlen($read));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function eof()
+    {
+        return $this->stream->eof() && '' === $this->buffer;
+    }
+
+    /**
+     * Buffer is filled by reading underlying stream.
+     *
+     * Callback is reading once more even if the stream is ended.
+     * This allow to get last data in the PHP buffer otherwise this
+     * bug is present : https://bugs.php.net/bug.php?id=48725
+     */
+    protected function fill()
+    {
+        $readFilterCallback = $this->readFilterCallback;
+        $this->buffer .= $readFilterCallback($this->stream->read(self::BUFFER_SIZE));
+
+        if ($this->stream->eof()) {
+            $this->buffer .= $readFilterCallback();
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getContents()
+    {
+        $buffer = '';
+
+        while (!$this->eof()) {
+            $buf = $this->read(self::BUFFER_SIZE);
+            // Using a loose equality here to match on '' and false.
+            if (null == $buf) {
+                break;
+            }
+
+            $buffer .= $buf;
+        }
+
+        return $buffer;
+    }
+
+    /**
+     * Always returns null because we can't tell the size of a stream when we filter.
+     */
+    public function getSize()
+    {
+        return null;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function __toString()
+    {
+        return $this->getContents();
+    }
+
+    /**
+     * Filtered streams are not seekable.
+     *
+     * We would need to buffer and process everything to allow seeking.
+     */
+    public function isSeekable()
+    {
+        return false;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function rewind()
+    {
+        @trigger_error('Filtered streams are not seekable. This method will start raising an exception in the next major version', E_USER_DEPRECATED);
+        $this->doRewind();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function seek($offset, $whence = SEEK_SET)
+    {
+        @trigger_error('Filtered streams are not seekable. This method will start raising an exception in the next major version', E_USER_DEPRECATED);
+        $this->doSeek($offset, $whence);
+    }
+
+    /**
+     * Returns the read filter name.
+     *
+     * @return string
+     *
+     * @deprecated since version 1.5, will be removed in 2.0
+     */
+    public function getReadFilter()
+    {
+        @trigger_error('The '.__CLASS__.'::'.__METHOD__.' method is deprecated since version 1.5 and will be removed in 2.0.', E_USER_DEPRECATED);
+
+        return $this->readFilter();
+    }
+
+    /**
+     * Returns the write filter name.
+     *
+     * @return string
+     */
+    abstract protected function readFilter();
+
+    /**
+     * Returns the write filter name.
+     *
+     * @return string
+     *
+     * @deprecated since version 1.5, will be removed in 2.0
+     */
+    public function getWriteFilter()
+    {
+        @trigger_error('The '.__CLASS__.'::'.__METHOD__.' method is deprecated since version 1.5 and will be removed in 2.0.', E_USER_DEPRECATED);
+
+        return $this->writeFilter();
+    }
+
+    /**
+     * Returns the write filter name.
+     *
+     * @return string
+     */
+    abstract protected function writeFilter();
+}
--- a/modules/paynow/vendor/php-http/message/src/Encoding/GzipDecodeStream.php
+++ b/modules/paynow/vendor/php-http/message/src/Encoding/GzipDecodeStream.php
@@ -0,0 +1,45 @@
+<?php
+
+namespace Http\Message\Encoding;
+
+use Clue\StreamFilter as Filter;
+use Psr\Http\Message\StreamInterface;
+
+/**
+ * Stream for decoding from gzip format (RFC 1952).
+ *
+ * @author Joel Wurtz <joel.wurtz@gmail.com>
+ */
+class GzipDecodeStream extends FilteredStream
+{
+    /**
+     * @param int $level
+     */
+    public function __construct(StreamInterface $stream, $level = -1)
+    {
+        if (!extension_loaded('zlib')) {
+            throw new \RuntimeException('The zlib extension must be enabled to use this stream');
+        }
+
+        parent::__construct($stream, ['window' => 31]);
+
+        // @deprecated will be removed in 2.0
+        $this->writeFilterCallback = Filter\fun($this->writeFilter(), ['window' => 31, 'level' => $level]);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function readFilter()
+    {
+        return 'zlib.inflate';
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function writeFilter()
+    {
+        return 'zlib.deflate';
+    }
+}
--- a/Show More
+++ b/Show More