EZezekg·May 5, 2017
Seeing as the index.js file is 15,482 lines of code[0] all attributed to a single author, I seriously doubt it.
[0]: https://github.com/totaljs/framework/blob/master/index.js
Edit: apparently that's not the right repo… looks like the comments are right that the source code for the messenger app is not on GitHub.
In Total.js Messenger – A small alternative to Slack