import type { Obstruction } from "../entities/widgets/sprites/units/Obstruction";
import type { UpgradeEvent } from "../Network";
import type { Action } from "./types";
export declare const upgradeSyncHandler: ({ time, connection, obstructions: obstructionIds, upgrade, }: UpgradeEvent) => void;
export declare const makeUpgradeAction: ({ fromObstruction, toObsturction, }: {
    fromObstruction: typeof Obstruction;
    toObsturction: typeof Obstruction;
}) => Action;