import type { NormalizedEntityState } from "./normalized-entity-state.js";
import type { HassStateLike, StateChangedEventData } from "../ws/typed-events.js";
export type HassStateNormalizable = HassStateLike;
export declare function normalizeHassState(state: HassStateNormalizable): NormalizedEntityState;
export declare function normalizeHassStateOrNull(state: HassStateNormalizable | null | undefined): NormalizedEntityState | null;
export declare function normalizeStateChangedEvent(data: StateChangedEventData, which?: "new" | "old"): NormalizedEntityState | null;
export declare class EntityStateNormalizer {
    normalize(state: HassStateNormalizable): NormalizedEntityState;
    normalizeOrNull(state: HassStateNormalizable | null | undefined): NormalizedEntityState | null;
    fromStateChanged(data: StateChangedEventData, which?: "new" | "old"): NormalizedEntityState | null;
}
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