Blocks movement of hostile creeps, and defends your creeps and structures on the same tile.
https://docs.screeps.com/api/#StructureRampart
Optional
Temporary effects that are active on this object
Tick at which the structure will next take decay damage
ID of the user who owns this object.
Note: NPCs do not have long-form hex ID strings like normal players:
Blocks movement of hostile creeps, and defends your creeps and structures on the same tile.
https://docs.screeps.com/api/#StructureRampart