[galaxyLogic]

You are supposed to call fs.write() etc. But you do it only under certain logical conditions. Those logical conditions do not arise like you would expect because of logic errors elsewhere in your code.

So your async function never calls fs.write() even though it was your intention that it should. Is that an error? Definitely, the file was never written to, it now has wrong content. But the problem is, as you run your program you do not get any error thrown at you, therefore you don't even know there is a problem. Later on you may, or may not, realize that the content of the file is wrong. And then it's hard to say what caused that error.

What "caused something not to happen" is a difficult question to answer because you can't pinpoint the exact location in time and code where it did not happen. Why? Because it did not happen anywhere, ever :-)