Fix some bugs with message delivery

src/Plex.ts

@@ -0,0 +1,23 @@
+import {EventBus} from "./util/EventBus"
+
+export class Plex {
+  constructor(urls, socket) {
+    this.urls = urls
+    this.socket = socket
+    this.bus = new EventBus()
+    this.listeners = sockets.map(socket => {
+      return socket.bus.addListener('message', (url, [verb, ...payload]) => {
+        this.bus.emit(verb, url, ...payload)
+      })
+    })
+  }
+  async send(...payload) {
+    await this.socket.connect()
+
+    this.socket.send([{relays: this.urls}, payload])
+  }
+  cleanup() {
+    this.bus.clear()
+    this.listeners.map(unsubscribe => unsubscribe())
+  }
+}