class_name VesselUpgradeDefinition
extends Resource

@export var upgrade_id: String
@export var display_name: String
@export_multiline var description: String
@export var base_cost: int
@export var max_level: int = 1
@export var icon: int
@export var additive_modifiers: Dictionary = {}
@export var multiplicative_modifiers: Dictionary = {}
# #63: spent from GameState.research_points per level bought, alongside
# base_cost (ore) rather than instead of it. 0 (the default) means this
# level needs no research points at all.
@export var research_point_cost: int = 0