/**
 * @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 { Anchor } from '../ports.js';
export interface HttpAnchorConfig {
    /**
     * The external log or store each sealed checkpoint is POSTed to. It must live outside the
     * ledger's database, or the anchor proves nothing.
     */
    url: string;
    /**
     * Supplies the `fetch` implementation. Defaults to the global `fetch`, which avoids any
     * node-specific dependency. Tests pass a stand-in.
     */
    fetch?: typeof fetch;
}
/**
 * Builds the {@link Anchor} that POSTs one sealed checkpoint to an external endpoint over HTTP,
 * the row as plain JSON. A network error or a non-2xx response throws a retryable
 * `PROVIDER.FAILURE`; the seal logs it and moves on, and the checkpoint id rides an
 * `Idempotency-Key` header so a later re-anchor of the same row dedupes at the receiver.
 */
export declare function httpAnchor(config: HttpAnchorConfig): Anchor;