How can I receive combinations of two/one finger and single/double taps in hammer.js - hammer.js

Question

I'm attempting to receive three types of tap events using hammer.js
single tap with one finger
double tap with one finger
double tap with two fingers
How can I set this up correctly in hammer.js
Here is what I currently have:
if (mc == null) {
mc = new Hammer.Manager(el);
}
mc.set({ touchAction: "none" });
//mc.get("swipe").set({direction: Hammer.DIRECTION_ALL, pointers: 2});'
//mc.get('tap').set({enable: false});
var singletap = new Hammer.Tap({
event: "singletap",
taps: 1,
pointers: 1
});
var doubletap = new Hammer.Tap({
event: "doubletap",
taps: 2,
pointers: 1
});
var twodoubletap = new Hammer.Tap({
event: "twodoubletap",
taps: 2,
pointers: 2
});
mc.add([twodoubletap, doubletap,singletap]);//, twotap, threetap]);
twodoubletap.recognizeWith([doubletap,singletap])
doubletap.recognizeWith([singletap,twodoubletap])
//doubletap.requireFailure(twodoubletap);
singletap.requireFailure([doubletap,twodoubletap]);
mc.on("twodoubletap doubletap singletap", binding.value);
I can get a single tap to fire consistently and a one finger double tap sometimes.
The two-finger double tap either does not fire, or fires along with a one other taps following it immediately.
Ideally, I would like each type of tap to fire consistently.

Answer 1

I was able to get this to work by doing three things.
1. I added dropRequireFailure to the two-fingerdouble tap for the other taps
2. I made the thresholds larger in the events.
3. I added a time-based filter in the event handler that rejects taps too close to each other. I know this isn't ideal but it works for now.
if (mc == null) {
mc = new Hammer.Manager(el);
}
mc.set({ touchAction: "none" });
//mc.get("swipe").set({direction: Hammer.DIRECTION_ALL, pointers: 2});'
//mc.get('tap').set({enable: false});
var singletap = new Hammer.Tap({
event: "singletap",
taps: 1,
pointers: 1,
interval: 500,
threshold: 200,
posThreshold: 200
});
var doubletap = new Hammer.Tap({
event: "doubletap",
taps: 2,
pointers: 1,
interval: 300,
threshold: 200,
posThreshold: 200
});
var twodoubletap = new Hammer.Tap({
event: "twodoubletap",
taps: 2,
pointers: 2,
interval: 400,
threshold: 500,
posThreshold: 200
});
mc.add([twodoubletap, doubletap,singletap]);//, twotap, threetap]);
twodoubletap.recognizeWith([doubletap,singletap])
doubletap.recognizeWith([twodoubletap])
doubletap.requireFailure(twodoubletap);
singletap.requireFailure([doubletap,twodoubletap]);
twodoubletap.dropRequireFailure(doubletap);
twodoubletap.dropRequireFailure(singletap);
mc.on("twodoubletap doubletap singletap", handler);
Then at the top of the event handler:
let now = Date.now();
if((now - lastTap)<500){
return;
}
lastTap = now;