cool new use for emeralds

I have 2 versions for this game drop idea

the first idea i have is that we can craft these devices that we can attach onto chests and barrels which make it that they need a certain amount of emeralds to open up and we can set how much emeralds people need to open it up, but this doesn't apply for the person who both made and placed it on the chest/barrel, and also the chest and barrels are indestructible like bedrock

My second idea for this is that instead of emeralds, we need a password of 4-8 digits to unlock the chest, and obviously it doesn't apply for the people who both created and placed it on it, and also it makes it indestructible as well