$urlGenerator = new Webgriffe\LibQuiPago\PaymentInit\UrlGenerator();
$url = $urlGenerator->generate(
	'https://ecommerce.nexi.it/ecomm/ecomm/DispatcherServlet',
    'merchant_alias',
    'secret_key',
    'sha1',
    50.50,
    '1200123',
    'http-cancel-url', // The URL where the user is redirected on failed payment
    '[email protected]',
    'http-succes-url', // The URL where the user is redirected on successful payment
    'SESSID123',
    'ITA',
    'http-post-url' // The URL for the server-to-server notification
);

// Returned $url is https://ecommerce.nexi.it/ecomm/ecomm/DispatcherServlet?alias=merchant_alias&importo=5050&divisa=EUR&codTrans=1200123&url_back=http-cancel-url&mail=customer%40mail.com&url=http-succes-url&session_id=SESSID123&languageId=ITA&urlpost=http-post-url&mac=0fa0ca05a13c6b5d0bd1466461319658f7f990bf

// These request params array comes from the QuiPago's HTTP notification request
$requestParams = array(
    'codTrans' => '1200123',
    'esito' => 'OK',
    'importo' => '5050',
    'divisa' => 'EUR',
    'data' => '20160221',
    'orario' => '181854',
    'codAut' => '123abc',
    'mac' => 'c83cee2a5422189cab2b54ef685b29dc428741dc',
    'alias' => 'merchant_123',
    'session_id' => '123123',
    '$BRAND' => 'Visa',
    'nome' => 'John',
    'cognome' => 'Doe',
    'mail' => '[email protected]',
);

$handler = new Webgriffe\LibQuiPago\Notification\Handler();
$handler->handle('secret_key', 'sha1', $requestParams)

// You'll get all parameters mapped    
$handler->getTransactionCode(); // '1200123'    
$handler->getAmount(); // 50.50
$handler->getCurrency(); //'EUR'
$handler->getTransactionDate(); // \DateTime('21/02/2016 18:18:54')
$handler->getAuthCode(); // '123abc'
$handler->getMacFromRequest(); // 'c83cee2a5422189cab2b54ef685b29dc428741dc'
$handler->getMerchantAlias(); // 'merchant_123'
$handler->getSessionId(); // '123123'
$handler->getCardBrand(); // 'Visa'
$handler->getFirstName(); // 'John'
$handler->getLastName(); // 'Doe'
$handler->getEmail(); // '[email protected]'

// And you know if the transaction has been authorized or not by calling
$handler->isTransactionResultPositive(); // true

require 'vendor/autoload.php';

$client = new Webgriffe\LibQuiPago\Api\Client(
    new GuzzleHttp\Client(),
    'payment_3444153',
    'TLGHTOWIZXQPTIZRALWKG',
    'Manu'
);

/** @var Webgriffe\LibQuiPago\Api\EcResponse $response */
$response = $client->capture(
    '000000123', // Transaction Code
    Webgriffe\LibQuiPago\Api\EcRequest::REQUEST_TYPE_FIRST_ATTEMPT,
    '000000123', // Operation Id
    105, // Original Amount
    '978', // Currency ISO code
    'TESTOK', // Auth Code
    105, // Operation Amount
    true // Is test request?
);

/** @var Webgriffe\LibQuiPago\Api\EcResponse $response */
$response = $client->void(
    '000000123', // Transaction Code
    Webgriffe\LibQuiPago\Api\EcRequest::REQUEST_TYPE_FIRST_ATTEMPT,
    '000000123', // Operation Id
    105, // Original Amount
    '978', // Currency ISO code
    'TESTOK', // Auth Code
    105, // Operation Amount
    true // Is test request?
);