/**
 * 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 { DocumentFieldIssue } from '../../validation/document-fields.js';
import type { DocumentLifecycleContext } from '../document-lifecycle/context.js';
import type { SingletonSaveResult } from './internals.js';
export interface RestoreSingletonVersionResult extends SingletonSaveResult {
    /**
     * Ways the restored content fails today's field validation. Restore is
     * exempt from that gate, so these never block it — they are reported so the
     * editor can say what must be fixed before the next ordinary save. Mirrors
     * `RestoreVersionResult.validationIssues` on the collection path.
     */
    validationIssues?: DocumentFieldIssue[];
}
/** Restore one historical singleton version as the new current version. */
export declare function restoreSingletonVersion(ctx: DocumentLifecycleContext, params: {
    sourceVersionId: string;
    expectedRevision: number;
}): Promise<RestoreSingletonVersionResult>;