So, I want to make an enchantment that gives jump boost when a piece of armor with said enchantment is worn, how so I do this?

Either give yourself a potion effect when the armor is worn or look at how the potion affects the player and replicate that with your enchantment.

1 hour ago, diesieben07 said:

Unfortunately the jump boost effect is hardcoded all over the game's code. You probably have to just apply a potion effect to achieve this.

@Mod.EventBusSubscriber(modid = MysteriousArtifacts.MOD_ID, bus = Mod.EventBusSubscriber.Bus.FORGE)
    public static class HighStepEquipped{
        @SubscribeEvent
        public static void action(TickEvent.PlayerTickEvent event) {

            PlayerEntity playerIn = event.player;
            playerIn.addPotionEffect(new EffectInstance(Effects.JUMP_BOOST, 20, 2));

        }

    }

I am using this code in my enchantment class, but if i join into the game it gives me this effect even when I'm not wearing the boots