Specifying a custom timeout causes an error

[0xdeafcafe]

I'm specifying a custom timeout like so:

const customTimeout = 60;

window.u2f.sign(appId, challenge, registeredKeys, res => {
	const signRes = res as SignResponse;

	if (signRes.clientData) {
		resolve(signRes);

		return;
	}

	const err = log.info('u2f_signing_failed', null, res);

	reject(err);
}, customTimeout);

However, when the timeout is hit it throws this error to the console:
Error in event handler for (unknown): TypeError: Cannot read property 'write' of undefined

[cpiper]

I'm not familiar with the 'as SignResponse' syntax, but simplifying your example to:

window.u2f.sign('https://u2fdemo.appspot.com', 'asdf', [], res => {console.log(res)}, 2);

seems to work and logs the timeout error after 2 seconds.

[0xdeafcafe]

The SignResponse is just from typescript definitions (from https://github.com/lgarron/u2f-api-polyfill.d.ts) however as these are just definitions they should have no impact on the logic.

I'll try setting it to 2 tomorrow, but when I tried setting it to anything it was just failing.

[cpiper]

Ok, not really knowing Typescript, it seems like SignResponse only covers success cases, and this is a failure case so none of the fields match what you are assigning it to.