No WebRTC support: Specify `opts.wrtc` option in this environment

[KingZee]

What version of WebTorrent?
0.103.1
What operating system and Node.js version?
Windows 7, v11.6.0

I'm having this issue again : feross/simple-peer#110

I don't understand what I'm doing wrong.
Here is my code for adding a torrent :

var TorClient = new WebTorrent({ tracker: { wrtc: false }});
TorClient.on('error', function(err){
    console.log('Fatal client error. Restart server.');
});

function addTorrent(tor,path){
    return new Promise(function(resolve,reject){
	    try {
		    TorClient.add(tor, {path: path},function ontorrent (torrent) {
			    resolve(torrent);	//called when torrent is ready to be downloaded
		    });
	    } catch (e) {
		    reject(e);
	    }
    });
}

(As I pasted this snippet I just remember I added a try-catch block for this reason around a month ago, I just forgot about this problem.)

Once the torrent is added through the code above, it's downloaded for a few seconds, and then an error is thrown.
The error thrown is similar to the linked issue :

  throw makeError('No WebRTC support: Specify `opts.wrtc` option in this environment', 'ERR_WEBRTC_SUPPORT')
  ^

Error: No WebRTC support: Specify `opts.wrtc` option in this environment
at makeError (...\node_modules\simple-peer\index.js:1017:13)

This is weird because I tried to go through simple-peer to disable wrtc, but it seems ironic, here's the relevant code for the error above :

  self._wrtc = (opts.wrtc && typeof opts.wrtc === 'object')
    ? opts.wrtc
    : getBrowserRTC() //returns null if it doesn't find window

  if (!self._wrtc) {
    if (typeof window === 'undefined') {
      throw makeError('No WebRTC support: Specify `opts.wrtc` option in this environment', 'ERR_WEBRTC_SUPPORT')
    } else {
      throw makeError('No WebRTC support: Not a supported browser', 'ERR_WEBRTC_SUPPORT')
    }
  }

Setting wrtc to either a falsey value, or a truthy one, will always trigger the error. Any help on how to work around this error? Thanks.

[KingZee]

const wrtc = require('wrtc');
var TorClient = new WebTorrent({ tracker: { wrtc: wrtc }});

Even including wrtc still triggers this error, anyone to help out please on how to fix this? Thanks.

[feross]

Are you running this code in a Node.js environment, Electron environment, or the browser? If so, which browser?

In Node.js, you shouldn't need to even set the option to { tracker: { wrtc: { false } }. I'll repeat what I said in the issue you linked:

The only way the error you're getting could possibly happen (as far as I can tell), is if you're setting the wrtc option in WebTorrent like this:

new WebTorrent({ tracker: { wrtc: true }})

Or you're setting global.WRTC to a truthy value, or using a shim for RTCPeerConnection that is confusing the get-browser-rtc module's detection code.

[KingZee]

The behavior of this was so inconsistent I couldn't accurately reproduce it because of the multiple packages involved (wrtc, simple-peer, and webtorrent).

I have tried with the options you mentioned and other different workarounds, but in any case I made my own fork of simple-peer so the error is no longer thrown, so I will close this unless I can accurately reproduce it.