README

Author: Josema

README.md

@@ -16,9 +16,38 @@
 
 **Distributed Object Protocol** is a thin layer on top of your data network that helps you communicate server and clients (nodes) using [RPCs](https://en.wikipedia.org/wiki/Remote_procedure_call). It is also a pattern that makes easy update, mutate or even sync the state of your App using [Patches](https://github.com/DistributedObjectProtocol/protocol#Patches).
 
-## RPCs with WebSockets
-
-image
+## Quick example using RPCs with WebSockets
+
+```js
+// Server
+const { createNode } = require('dop')
+const WebSocket = require('ws')
+const wss = new WebSocket.Server({ port: 8080 })
+
+const sum = (a, b) => a + b
+const multiply = (a, b) => a * b
+const getCalculator = () => ({ sum, multiply })
+
+wss.on('connection', ws => {
+    const client = createNode()
+    client.open(ws.send.bind(ws), getCalculator)
+    ws.on('message', client.message)
+})
+```
+
+```js
+// Client
+const ws = new WebSocket('ws://localhost:8080')
+const server = createNode()
+ws.on('open', async () => {
+    const getCalculator = server.open(ws.send.bind(ws))
+    const { sum, multiply } = await getCalculator()
+    const result1 = await sum(5, 5)
+    const result2 = await multiply(3, 3)
+    console.log(result1, result2) // 10, 9
+})
+ws.on('message', server.message)
+```
 
 Check the website for more info [https://distributedobjectprotocol.org/](https://distributedobjectprotocol.org/guide/javascript)