I hate my code, but buy/sell is done

scripts/Base/Menu/buy_sell_button.gd

@@ -0,0 +1,41 @@
+extends MessageSenderAction
+
+## How many items will be bought/sold
+var amount: int
+## How much money will be received/spent
+var total_cost: float
+## Item name which will be added to cargo
+var item_name: String
+
+var buy: bool
+
+@onready var player_ship: PlayerShip = get_tree().current_scene.player_ship
+
+func _ready():
+	amount = format["amount"]
+	total_cost = format["total_cost"]
+	item_name = format["item_name"]
+	buy = format["buy"]
+	if amount < 1:
+		disabled = true
+	elif !buy and player_ship.money < total_cost:
+		disabled = true
+	elif buy and item_name in player_ship.cargo:
+		if player_ship.cargo[item_name] < amount:
+			disabled = true
+	elif buy and !(item_name in player_ship.cargo):
+		disabled = true
+	super._ready()
+
+func action():
+	get_parent().buy_sell_amount = amount
+	if !buy and player_ship.money >= total_cost:
+		player_ship.money -= total_cost
+		if item_name in player_ship.cargo:
+			player_ship.cargo[item_name] += amount
+		else:
+			player_ship.cargo[item_name] = amount
+	elif buy and player_ship.cargo[item_name] >= amount:
+			player_ship.cargo[item_name] -= amount
+			player_ship.money += total_cost
+	super.action()