Transfering energy to controller

[Athanasius]

room E4S9 i'm running the code

creep.transferEnergy(creep.room.controller)

and this returns a -7. Are controllers not a valid target for transferEnergy?

[DXsmiley]

You should be using creep.claimController(creep.room.controller) to claim it, and then creep.upgradeController(creep.room.controller) to pump energy into it.

[chris]

Hey Athanasius, welcome to the screeps community!

Can you please first check if something is perhaps wrong with your code, before flooding the Forum?