The PlayerInteract Event is fired whenever a player interacts with a block.

You will need to cast the event in the function header as this class:
crafttweaker.event.PlayerInteractEvent
You can, of course, also import the class before and use that name then.

PlayerInteract Events implement the following interfaces and are able to call all of their methods/getters/setters as well:

• IEventCancelable
• IPlayerEvent
• IEventPositionable

The following information can be retrieved from the event:

ZenGetter	Return Type
ZenGetter canceled	Return Type boolean
ZenGetter usingItem	Return Type boolean
ZenGetter usingBlock	Return Type boolean
ZenGetter x	Return Type int
ZenGetter y	Return Type int
ZenGetter z	Return Type int
ZenGetter face	Return Type IFacing
ZenGetter player	Return Type IPlayer
ZenGetter world	Return Type IWorld
ZenGetter block	Return Type IBlock
ZenGetter item	Return Type IItemStack
ZenGetter dimension	Return Type int

• event.cancel() sets the event as cancelled
• event.useBlock() sets usingBlock to true
• event.useItem() sets usingItem to true
• event.damageItem(int amount) damages the item by the specified amount