Multiple Fixes:

- Config Explainer
 - Rewards
 - Destination Reach Condition
 - Additional Step Callback

marl_factory_grid/modules/batteries/actions.py

@@ -19,7 +19,7 @@ class Charge(Action):
 
     def do(self, entity, state) -> Union[None, ActionResult]:
         if charge_pod := h.get_first(state[b.CHARGE_PODS].by_pos(entity.pos)):
-            valid = h.get_first(charge_pod.charge_battery(entity, state))
+            valid = charge_pod.charge_battery(entity, state)
             if valid:
                 state.print(f'{entity.name} just charged batteries at {charge_pod.name}.')
             else:

marl_factory_grid/modules/batteries/rules.py

@@ -53,7 +53,7 @@ class BatteryDecharge(Rule):
 
         for agent in state[c.AGENT]:
             if isinstance(self.per_action_costs, dict):
-                energy_consumption = self.per_action_costs[agent.step_result()['action']]
+                energy_consumption = self.per_action_costs[agent.state.identifier]
             else:
                 energy_consumption = self.per_action_costs