Cannot read property 'udp' of undefined - google-chrome

Question

I am trying to make a Chrome App to use UDP, but I can not pass simple UDP creation socket process. This is the error I get in the inspector window:
sockets.udp.create: TypeError: Cannot read property 'udp' of undefined
at Object.callback
The error is shown at this line:
chrome.sockets.udp.create({}, function(....
The manifest.json is this:
{
"manifest_version": 2,
"name" : "My App",
"description" : "My App Description",
"version" : "1.0",
"icons" : {
"16" : "icons/wl16.png",
"48" : "icons/wl48.png",
"128" : "icons/wl128.png"
},
"app" : {
"background" : {
"scripts": ["main.js"]
}
},
"sockets" : {
"udp" : {
"send" : ["*"],
"bind" : ["*"]
}
}
The main.js is as follows:
chrome.app.runtime.onLaunched.addListener(function() {
console.log('launched')
sendpack()
})
function sendpack() {
// Create the Socket
chrome.sockets.udp.create({}, function(socketInfo) {
// The socket is created, now we can send some data
var socketId = socketInfo.socketId;
chrome.socket.udp.bind(socketId, '127.0.0.1', 1345, function(result){
console.log('chrome.socket.bind: result = ' + result.toString());
});
var arrayBuffer=new ArrayBuffer(2);
arrayBuffer[0]=65;
arrayBuffer[1]=66;
chrome.sockets.udp.send(socketId, arrayBuffer,'127.0.0.1', 1337,function(sendInfo) {
console.log("sent " + sendInfo.bytesSent);
});
});
}
I copied everything from Chrome examples, but on the examples it works, on my app it doesnt.
If I print on the console the content of the object 'chrome.sockets.udp' it shows a valid object with 'create' method listed in it:
Object {onReceive: Event, onReceiveError: Event}
create: function()
What could be wrong?

Answer 1

I found the error, the bind call had bad object name:
chrome.socket.udp.bind
it should be in plural, "sockets"
chrome.sockets.udp.bind
I also mistakenly read the stack trace, from the bottom, not from the top.