diff --git a/src/App.tsx b/src/App.tsx
index 8a52dbf..a89acdd 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,6 +1,9 @@
 import * as React from 'react';
 import { render } from 'react-dom';
+import { initContext } from './context';
 
-import Counter from './Counter';
+import Home from './Home';
 
-render(<Counter />, document.getElementById('main'));
\ No newline at end of file
+initContext();
+
+render(<Home />, document.getElementById('main'));
\ No newline at end of file
diff --git a/src/Counter.tsx b/src/Counter.tsx
deleted file mode 100644
index b20d0c9..0000000
--- a/src/Counter.tsx
+++ /dev/null
@@ -1,33 +0,0 @@
-import * as React from 'react';
-
-export default class Counter extends React.Component {
-  state = {
-    count: 0
-  };
-
-  increment = () => {
-    this.setState({
-      count: (this.state.count + 1)
-    });
-  };
-
-  startConnection = () => {
-      const ws = new WebSocket("ws://localhost:5000");
-      ws.onopen = (event : Event)=>{
-          console.log("onopen");
-          ws.send("Messgage from client");
-      }
-      ws.onmessage = (event : MessageEvent) =>{
-          console.log(event.data);
-      }
-  };
-
-  render () {
-    return (
-      <div>
-        <h1>{this.state.count}</h1>
-        <button onClick={this.startConnection}>Start Connection</button>
-      </div>
-    );
-  }
-}
\ No newline at end of file
diff --git a/src/Home.tsx b/src/Home.tsx
new file mode 100644
index 0000000..f10ae33
--- /dev/null
+++ b/src/Home.tsx
@@ -0,0 +1,35 @@
+import * as React from 'react';
+import  { FunctionComponent, useState } from 'react';
+import {context} from './context'
+import { RTMTWS } from './rtmt/rtmt_websocket';
+
+const Home:FunctionComponent<{ initial?: number }> = ({ initial = 0 }) => {
+  const [clicks, setClicks] = useState(initial);
+
+  React.useEffect(()=>{
+
+    
+
+    const rtmtws = context.rtmt as RTMTWS
+    if(rtmtws){
+      rtmtws.initWebSocket(onConnectionDone)
+    }else{
+      console.log("context.rtmt is not RTMTWS");
+    }
+  })
+
+  const onConnectionDone = ()=>{
+    context.rtmt.sendMessage("new_game", "")
+    context.rtmt.listenMessage("new_game", (message)=>{
+      console.log("new message");
+    })
+  }
+
+  return <>
+    <p>Clicks: {clicks}</p>
+    <button onClick={() => setClicks(clicks+1)}>+</button>
+    <button onClick={() => setClicks(clicks-1)}>-</button>
+  </>
+}
+
+export default Home
\ No newline at end of file
diff --git a/src/context.tsx b/src/context.tsx
new file mode 100644
index 0000000..481fc26
--- /dev/null
+++ b/src/context.tsx
@@ -0,0 +1,19 @@
+import { RTMT } from "./rtmt/rtmt"
+import { RTMTWS } from "./rtmt/rtmt_websocket"
+import { UserKeyStore, UserKeyStoreImpl } from "./store/key_store"
+
+type Context = {
+    rtmt : RTMT
+    userKeyStore : UserKeyStore
+}
+
+export const initContext = ()=> {
+    const rtmt =  new RTMTWS()
+    const userKeyStore = new UserKeyStoreImpl()
+    return {
+        rtmt : rtmt,       
+        userKeyStore : userKeyStore,
+    }
+}
+
+export const context : Context = initContext()
diff --git a/src/rtmt/byte_util.ts b/src/rtmt/byte_util.ts
new file mode 100644
index 0000000..a4e550a
--- /dev/null
+++ b/src/rtmt/byte_util.ts
@@ -0,0 +1,12 @@
+import { Bytes } from "./rtmt"
+const textEncoder = new TextEncoder()
+const textDecoder = new TextDecoder("utf-8")
+
+export function encodeText(text : string) {
+    const bytes = textEncoder.encode(text)
+    return bytes
+}
+
+export function decodeText(bytes : Bytes) {
+    return textDecoder.decode(bytes)
+}
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diff --git a/src/rtmt/encode_decode_message.ts b/src/rtmt/encode_decode_message.ts
new file mode 100644
index 0000000..686c544
--- /dev/null
+++ b/src/rtmt/encode_decode_message.ts
@@ -0,0 +1,52 @@
+import { decodeText, encodeText } from "./byte_util";
+import { Bytes } from "./rtmt";
+
+const headerLenght = 4
+//
+// channel is string, message is byte array
+//
+export function encode(channel : string, message : Bytes) {
+    const channelLenght = channel.length
+    const messageLenght = message.length
+    const totalLenght = headerLenght + channelLenght + messageLenght
+
+    const buffer = new ArrayBuffer(totalLenght);
+    const view = new DataView(buffer);
+
+    view.setUint32(0, channelLenght);
+
+    const channelBytes = encodeText(channel)
+
+    let count = headerLenght
+    channelBytes.forEach((byte)=>{
+         view.setUint8(count, byte)
+        count++
+    })
+
+    for (const byte of message) {
+        view.setUint8(count, byte)
+        count++
+    }
+
+    return buffer
+}
+
+// 
+// return { channel :  string, message :  byte array} 
+//
+export function decode(bytes : Bytes) {
+    const view = new DataView(bytes);
+
+    const channelLenght = view.getUint32(0)
+
+
+    const channel = decodeText(
+        bytes.slice(headerLenght, headerLenght + channelLenght))
+
+    const message =  bytes.slice(headerLenght + channelLenght)
+
+    return {
+        "channel": channel,
+        "message": message,
+    }
+}
diff --git a/src/rtmt/rtmt.ts b/src/rtmt/rtmt.ts
new file mode 100644
index 0000000..2effa53
--- /dev/null
+++ b/src/rtmt/rtmt.ts
@@ -0,0 +1,7 @@
+export type Bytes = UInt8Array
+export type OnMessage = (message : Bytes) => any
+
+export interface RTMT{
+    sendMessage : (channel : string, message : Bytes) => any
+    listenMessage : (channel : string, callback : OnMessage) => any
+}
\ No newline at end of file
diff --git a/src/rtmt/rtmt_websocket.ts b/src/rtmt/rtmt_websocket.ts
new file mode 100644
index 0000000..6a464f6
--- /dev/null
+++ b/src/rtmt/rtmt_websocket.ts
@@ -0,0 +1,70 @@
+import { decode, encode } from "./encode_decode_message"
+import { OnMessage, RTMT } from "./rtmt"
+import { context } from '../context';
+import { wsServerAdress } from "../service/http_service";
+
+export class RTMTWS implements RTMT{
+
+    private messageChannels : Map<String,OnMessage> 
+    private ws : WebSocket
+
+    constructor() {
+        this.messageChannels = new Map<String, OnMessage>()
+    }
+
+    initWebSocket(onopen : ()=>any) {
+        context.userKeyStore.getUserKey((userKey : string)=>{
+            const url = wsServerAdress + '?userKey=' + userKey
+            const ws = new WebSocket(url)
+            ws.binaryType = "arraybuffer"; //for firefox
+            ws.onopen = () => {
+                console.log('ws has opened')
+                this.ws = ws
+                onopen()
+            }
+            ws.onclose = () => {
+                console.log('ws has closed')
+                //this.ws = undefined
+            }
+    
+            ws.onmessage = (event : MessageEvent)=>{
+                this.onWebSocketMessage(this, event)
+            }
+    
+            ws.addEventListener("error", ev => {
+                console.log({ ws_error: ev });
+            })
+        })
+    }
+
+    sendMessage(channel : string, message : Int8Array) {
+        if(this.ws === undefined){
+            console.log('ws is undefined')
+            return
+        }
+        const data = encode(channel, message)
+        console.log("(RTMT) Sending message to channel " + channel);
+        this.ws.send(data)
+    }
+
+    listenMessage(channel : string, callback : OnMessage) {
+        this.messageChannels.set(channel, callback)
+    }
+
+    onWebSocketMessage(rtmt : RTMTWS, event : MessageEvent) {
+        console.log(event);
+        
+        const { channel, message } = decode(event.data)
+        rtmt.onMessage(channel, message)
+    }
+
+    onMessage(channel : string, message : Int8Array){
+        const callback = this.messageChannels.get(channel)
+
+        if(callback){
+            callback(message)
+        }else{
+            console.log("Channel callback not found!" + channel);
+        }
+    }
+}
\ No newline at end of file