Rather than having a command players have to use to stack/unstack their coins, could you just make a shapeless recipe to exchange coins back and forth? I managed to make a minetweaker script to combine coins to a higher denomination, but I can't seem to do it in reverse, and it would be much easier to have a recipe the player could use without a crafting table. Any combination of the same type of 100 coins (e.g., going from copper to silver, and put 48 and 52, 39 and 61 copper coins in a grid, etc) can craft the higher denom, and when you put a single coin in (say going silver back to bronze), you get a stack of 64 and one of 36 to equal 100..
Long winded explanation, but basically doing the same thing your commands already do but just doing it in the crafting grid instead.
Rather than having a command players have to use to stack/unstack their coins, could you just make a shapeless recipe to exchange coins back and forth? I managed to make a minetweaker script to combine coins to a higher denomination, but I can't seem to do it in reverse, and it would be much easier to have a recipe the player could use without a crafting table. Any combination of the same type of 100 coins (e.g., going from copper to silver, and put 48 and 52, 39 and 61 copper coins in a grid, etc) can craft the higher denom, and when you put a single coin in (say going silver back to bronze), you get a stack of 64 and one of 36 to equal 100..
Long winded explanation, but basically doing the same thing your commands already do but just doing it in the crafting grid instead.