Notify users when there is new version available

[slaweet]

Expected behaviour

When a user launches Lisk Nano and it's not the latest version, some kind of unobtrusive notification should inform the user about the newer version. Possibly with a download link.

Actual behaviour

When a new version of Lisk Nano is released, users have to follow Lisk communication channels (chat, blog, etc.) to find out about it or check Lisk website themeselves.

[slaweet]

Part 3 of this post contains most of what's necessary:
https://nulab-inc.com/blog/typetalk/3-necessary-things-to-correctly-release-a-product-based-on-the-electron-app/

# set api url
var feedUrl = 'https://YOUR_API_ENDPOINT?version=' + app.getVersion();
autoUpdater.setFeedURL(feedUrl);

# event handling after download new release
autoUpdater.on('update-downloaded', function (event, releaseNotes, releaseName, releaseDate, updateUrl, quitAndUpdate) {

  # confirm install or not to user
  var index = dialog.showMessageBox(mainWindow, {
    type: 'info',
    buttons: [i18n.__('Restart'), i18n.__('Later')],
    title: "Lisk Nano",
    message: i18n.__('The new version has been downloaded. Please restart the application to apply the updates.'),
    detail: releaseName + "\n\n" + releaseNotes
  });

  if (index === 1) {
    return;
  }

  # restart app, then update will be applied
  quitAndUpdate();

The post also describes the server side:

exports.handler = function (event, context) {
  var latestRelease = {
    version: "1.2.0",
    url: "http://example.com/LiskNano.app.zip",
    name: "Lisk Nano " + version,
    notes: "- Proxy authentication\n- Show window menu\n- improve performance"
  };
 
  if (event.version < latestRelease.version) {
    context.done(null, latestRelease);
  } else {
    context.done("Not Modified");
  }
};

So we need a ticket in a server-side project to create this kind of API end point. I suggest to put it to lisk-website.