> For the complete documentation index, see [llms.txt](https://docs.easypay.sa/easypay/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.easypay.sa/easypay/quick-start.md).
# Quick Start
## **Before you begin**
Easypay team needs to assigned a demo terminal for you using your phone number to be able to start this integration.\
\
In addition, you need to have an android physical device that supports NFC to be able to test the integration and run the app on it.
## **Start your first transaction:**
### **1- Downland and install the Easypay app form google store** [**Click here to downland**](https://play.google.com/store/apps/details?id=com.easyerps.easypay)**.**
### 2- Login by clicking demo button by entering your phone number and then follow the setup instruction.
### 3- on app home screen click to Connect and then click Start, after service starting save the IP Address for later use and than click Running on background
### 4- Create WebSocket **wherever you need:**
```javascript
// Create WebSocket connection.
const socket = new WebSocket("ws://localhost:5000"); // use "localhost" for connection on same device or use "IP address" for connection from external device.
// Connection opened
socket.onopen = () => {
// connection opened – add action here
});
// Listen for messages
socket.onmessage = (event) => {
// payload received and message can be fetched on event.data
// parse JSON message here or add an action
});
// Listen for possible errors
socket.onerror = (event) => {
// error can be determined on evt.message
});
// Connection opened
socket.onclose = () => {
// connection closed
});
```
### 5- Sending Socket function:
socket.send(JSON.stringify({
"method": "PURCHASE",
"amount": 100, // [Required] ammount you want to set .
"customerReferenceNumber": "1234" // [optional] any number you want to add as a refrence Any string as a reference number.
}));
### 6- Close WebSocket function:
```javascript
socket.close();
```