/*!
 * Copyright (c) 2026 Interop Alliance. All rights reserved.
 */
/**
 * The pure EDV-envelope predicate, kept dependency-free (no crypto graph) so a
 * plaintext consumer can import it without pulling the `@interop/was-client/edv`
 * stack.
 */
import type { Json } from '../types.js';
/**
 * Whether a stored body is an EDV encryption envelope (carries an object `jwe`)
 * rather than a plaintext document. Lets read paths stay tolerant of legacy
 * plaintext rows (written before a collection's encryption descriptor was
 * declared) and lets a one-time migration find the rows it must re-key.
 *
 * @param data {Json | undefined}   the stored resource body
 * @returns {boolean}
 */
export declare function isEncryptedEnvelope(data: Json | undefined): boolean;
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