Update README.md

README.md

@@ -1,2 +1,57 @@
 # SprayPay
-SprayPay API client for PHP
+SprayPay API client for PHP.
+
+## Getting started
+For usage and allowed parameters please view the official SprayPay API documentation. 
+
+**Initialize client**
+```
+$client = new SprayPayApiClient();
+$client->setApiKey('YOUR_API_KEY);
+$client->setWebshopId('YOUR_WEBSHOP_ID');
+$client->setTestMode();
+```
+
+**Run preflight request**
+```
+$response = $client->loanrequestpreflight->preflight([
+    'emailAddress'       => 'some_email',
+    'webshopOrderAmount' => '10.00',
+    'webshopOrderId'     => 1,
+    'webshopCustomerId'  => 1,
+    'returnUrl'          => ''
+]);
+```
+
+**Payment/Loan request**  
+
+```
+$loanrequest->create($data, true, true);
+```
+
+**Get order status**
+```
+$this->client->orderstatus->get(1);
+```
+
+**Create a chargeback request**
+```
+$client->chargebackrequest->create([
+    'date'                      => '2020-02-02',
+    'amount'                    => '10.00',
+    'chargebackNotificationUrl' => '',
+    'orderId'                   => 1,
+    'reason'                    => 'Some reason'
+]);
+```
+
+**Get chargeback request status**
+```
+$response = $client->chargebackrequest->getStatus(['reference' => 'SOME_REFERENCE']);
+```
+
+**Payment resource example**
+```
+$payment = new Payment(client->loanrequest->create($data, true, true));
+$payment->isPaid();
+```