finish websocket protocol.

relay.js

@@ -11,15 +11,36 @@ export function relayConnect(url, onEventCallback) {
   ws.onerror = err => console.log('error connecting', url, err)
 
   ws.onmessage = e => {
-    let event = JSON.parse(e.data)
-    event.context
+    let data = JSON.parse(e.data)
+    if (data.length > 1) {
+      if (data[0] === 'notice') {
+        console.log('message from relay ' + url + ' :' + data[1])
+      } else if (typeof data[0] === 'object') {
+        onEventCallback(data[0], data[1])
+      }
+    }
   }
 
   return {
     url,
-    subscribe() {},
-    request() {},
-    publish() {},
+    subKey(key) {
+      ws.send('sub-key:' + key)
+    },
+    unsubKey(key) {
+      ws.send('unsub-key:' + key)
+    },
+    homeFeed(params = {}) {
+      ws.send('req-feed:' + JSON.stringify(params))
+    },
+    reqEvent(params) {
+      ws.send('req-key:' + JSON.stringify(params))
+    },
+    reqKey(params) {
+      ws.send('req-key:' + JSON.stringify(params))
+    },
+    sendEvent(event) {
+      ws.send(JSON.stringify(event))
+    },
     close() {
       ws.close()
     }