For what I am currently working on, I want a door that opens when you pay the cost of a gold keycard, a green keycard, a purple keycard, etc. I know I could do this by using a chain of vending machines, but that would make you lose a bunch and not open the door if you don’t have them all. How do I do this so that that doesn’t happen?
Use the checker and a button or use a crafting table. However, the crafting table can’t be layered.
oh i built this simple insteda of a button to open the door replace it with a vending machien
Crafting Tables! You can trigger channels using a crafting recipe too.
Bruh just use crafting tables 
also use crafting recipes aswell
you can use a crafting table and crafting recipe device. Here is a guide on how to do that.
I don’t want to open a UI like with a crafting table/farmland or questioner. I want it to be like pressing a button and it opens the door.
You could just use crafting table groups, or use a checker that tracks an item that can activate or deactivate the vending machines.
If you set up the vending machines, you can use a checker or item tracker to activate or deactivate the vending machines.
What about this:
Button pressed → run checks
For each check passed → Increased counter
Counter settings:
Player scoped
Target number (however many checks you have)
Counter target reached → Unlock door
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I have no idea if this works