/**
 * @pwngh/economy-lab
 *
 * Copyright (c) Preston Neal
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE.md file in the root directory of this source tree.
 *
 * @license MIT
 */
import type { Digest } from './ports.js';
/**
 * The system SHA-256 {@link Digest}: prefers node:crypto's synchronous hash (faster for the small
 * per-posting preimages) and falls back to Web Crypto. Both compute the same bytes, so a hash
 * written on one runtime still re-derives on another.
 */
export declare function sha256Digest(): Digest;