MCLivingHurtEvent

This event is fired just before an entity is hurt. This allows you to modify the damage received, cancel the attack, or run additional effects.

The event is cancelable.

If the event is canceled, the entity is not hurt

The event does not have a result.

It might be required for you to import the package if you encounter any issues (like casting an Array), so better be safe than sorry and add the import at the very top of the file.

import crafttweaker.api.event.entity.living.MCLivingHurtEvent;

MCLivingHurtEvent extends MCLivingEvent. That means all methods available in MCLivingEvent are also available in MCLivingHurtEvent

Gets the amount of damage.

Return Type: float

MCLivingHurtEvent.getAmount() as float
event.getAmount();

Gets the source of the damage.

Return Type: DamageSource

MCLivingHurtEvent.getSource() as DamageSource
event.getSource();

Sets the amount of damage.

Return Type: void

MCLivingHurtEvent.setAmount(amount as float) as void
event.setAmount(0.5);