/**
 * Shared contract tests for {@link AttachmentStore} implementations.
 *
 * Store packages call {@link defineAttachmentStoreContractTests} with a
 * factory that creates their backend. The tests exercise every method on
 * `AttachmentStore` with identical behavioral assertions regardless of the
 * underlying storage engine — content-addressed put/get round-trips,
 * idempotent puts by `(scope, digest)`, digest verification, scope isolation,
 * and deletion semantics (`delete` of a missing attachment throws
 * `NOT_FOUND`).
 *
 * @example
 * ```ts
 * import { defineAttachmentStoreContractTests } from '@fabric-harness/sdk/testing/contracts';
 *
 * defineAttachmentStoreContractTests('My backend', async () => ({
 *   store: await createMyAttachmentStore(),
 *   close: async () => myBackend.close(),
 * }));
 * ```
 */
import type { AttachmentStore } from './attachment-store.js';
export interface AttachmentStoreContractHandle {
    /** The fresh store under test. */
    store: AttachmentStore;
    /** Optional cleanup after the test (close connections, delete temp files). */
    close?: () => Promise<void>;
}
/**
 * Register the standard {@link AttachmentStore} contract tests under the
 * given describe label. Each test gets a fresh store from `factory()`.
 */
export declare function defineAttachmentStoreContractTests(name: string, factory: () => Promise<AttachmentStoreContractHandle>): void;
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