Fix WaitForNetwork in javascript

examples/sendE2E/xxdk.js

@@ -120,7 +120,7 @@ async function SendE2e(htmlConsole, stopNetworkFollowerBtn, ndf,
 
     // Wait for network to become healthy
     htmlConsole.log("Waiting for network to be healthy")
-    net.WaitForNetwork(25000).then(
+    await net.WaitForNetwork(25000).then(
         () => {
             htmlConsole.log("Network is healthy")
         },
@@ -138,6 +138,8 @@ async function SendE2e(htmlConsole, stopNetworkFollowerBtn, ndf,
     let listener = {
         Hear: function (item) {
             htmlConsole.log("Listener heard: " + dec.decode(item))
+            const message = JSON.parse(dec.decode(item))
+            htmlConsole.log("Listener message: " + atob(message))
         },
         Name: function () {
             return "Listener";