/**
 * This Source Code is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * Copyright (c) Infonomic Company Limited
 */
import type { DocumentRevisionReceipt, SingletonSavePrecondition } from '../../@types/index.js';
import type { DocumentLifecycleContext } from '../document-lifecycle/context.js';
import type { SingletonSaveResult } from './internals.js';
export type UpdateSingletonParams = SingletonSavePrecondition & {
    data: Record<string, any>;
    locale?: string;
};
export type UpdateSingletonResult = SingletonSaveResult & DocumentRevisionReceipt;
/** Prepare outside locks; recheck the observed slot/document under S → D before committing. */
export declare function updateSingleton(ctx: DocumentLifecycleContext, params: UpdateSingletonParams): Promise<UpdateSingletonResult>;