Remove dead code

core/level_game_state.gd

@@ -46,7 +46,6 @@ var _goal_completed: Dictionary = {}
 
 var research_xp: Dictionary = {}
 var research_levels: Dictionary = {}
-var research_tracker: Node = null
 
 var last_save_time: int = 0
 
@@ -80,6 +79,8 @@ var prestige_manager: PrestigeManager
 
 func _ready() -> void:
 	prestige_manager = find_child("PrestigeManager")
+	assert(prestige_manager != null)
+	
 	_initialize_currency_maps()
 	_initialize_catalogues()
 	_load_catalogue_goals()
@@ -482,9 +483,11 @@ func get_research_multiplier(research_id: StringName) -> float:
 	return research.get_multiplier_for_level(level)
 
 func add_research_xp(research_id: StringName, xp: BigNumber) -> void:
+	var actual_xp: BigNumber = ResearchBuffCalculator.apply_buffs(self, research_id, xp)
+	
 	var old_level: int = get_research_level(research_id)
 	var current_xp: BigNumber = get_research_xp(research_id)
-	research_xp[research_id] = current_xp.add(xp)
+	research_xp[research_id] = current_xp.add(actual_xp)
 	
 	var research: ResearchData = _get_research_data(research_id)
 	if research != null:
@@ -496,20 +499,6 @@ func add_research_xp(research_id: StringName, xp: BigNumber) -> void:
 	
 	research_xp_changed.emit(research_id, research_xp[research_id])
 
-func get_research_xp_multiplier(research_id: StringName) -> float:
-	var multiplier: float = 1.0
-	var research: ResearchData = _get_research_data(research_id)
-	if research == null:
-		return 1.0
-	
-	if not research.associated_buff_id.is_empty():
-		var buff: GeneratorBuffData = get_buff(research.associated_buff_id)
-		if buff != null and is_buff_active(buff.id):
-			var level: int = get_buff_level(buff.id)
-			multiplier *= buff.get_effect_multiplier(level)
-	
-	return multiplier
-
 func _get_research_data(research_id: StringName) -> ResearchData:
 	if research_catalogue == null:
 		return null