/**
 * @license
 * Copyright 2022-2026 Matter.js Authors
 * SPDX-License-Identifier: Apache-2.0
 */
import type { Val } from "@matter/protocol";
import type { ValReference } from "./ValReference.js";
/**
 * The slot a member occupies in a container keyed by {@link ValReference.primaryKey}.
 *
 * The persisted key set ({@link RootSupervisor.persistentKeys}) and a datasource container's own keys must both
 * derive from this function — if they diverge, attributes silently stop persisting.
 */
export declare function memberKeyFor(primaryKey: ValReference.PrimaryKey, name: string | number, id: number | undefined): string | number;
/**
 * The key under the other keying convention, if distinct from {@link memberKeyFor}'s — whether a reader may fall
 * back to it is the reader's policy.
 */
export declare function memberFallbackKeyFor(primaryKey: ValReference.PrimaryKey, name: string | number, id: number | undefined): string | number | undefined;
/**
 * Read a member from container at key, falling back to fallbackKey; a caller passes `undefined` for fallbackKey
 * when it must not tolerate the fallback slot.
 */
export declare function memberValueOf(container: Val.Struct, key: string | number, fallbackKey: string | number | undefined): Val | undefined;
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