still mastering the concept of early returns

code/game/machinery/nuclearbomb.dm

@@ -632,22 +632,18 @@ GLOBAL_VAR_INIT(bomb_set, FALSE)
 
 /obj/structure/machinery/nuclearbomb/tech/attackby(obj/item/nuke_disk as obj, mob/user as mob)
 	var/reduction_multiplier = 0.7 //30% reduction
-	if(istype(nuke_disk, /obj/item/disk/nuclear))
+	if(!istype(nuke_disk, /obj/item/disk/nuclear))
 		attack_hand(user)
-		if(decrypting)
-			if (decryption_time > 0)
-				decryption_end_time = LERP(world.time, decryption_end_time, reduction_multiplier)
-				decryption_time = decryption_end_time - world.time
-				to_chat(user, SPAN_WARNING("The decryption process begins using the disk's data..."))
-				announce_to_players() //Let everyone know the new time
-				qdel(nuke_disk)
-				return
-			else
-				to_chat(user, SPAN_WARNING("Decryption is already complete..."))
-				return
-		else
-			to_chat(user, SPAN_WARNING("It needs to be decrypting first!"))
-			return
-	else
 		to_chat(user, SPAN_WARNING("You probably shouldn't hit it with \the [src]..."))
 		return
+	if(!decrypting)
+		to_chat(user, SPAN_WARNING("It needs to be decrypting first!"))
+		return
+	if(decryption_time <= 0)
+		to_chat(user, SPAN_WARNING("Decryption is already complete..."))
+		return
+	decryption_end_time = LERP(world.time, decryption_end_time, reduction_multiplier)
+	decryption_time = decryption_end_time - world.time
+	to_chat(user, SPAN_WARNING("The decryption process begins using the disk's data..."))
+	announce_to_players() //Let everyone know the new time
+	qdel(nuke_disk)