/**
 * @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 { Ctx, Operation, Outcome } from '../contract.js';
import type { Unit } from '../ports.js';
/**
 * Cancels an active subscription. A status change only, moving no money (cancel forfeits the rest
 * of the paid period with no refund), so it posts a placeholder {@link lifecycleMarker}, marks the
 * record `CANCELED`, and returns `committed`.
 *
 * A missing or already-canceled subscription returns a `rejected` `UNKNOWN_SUBSCRIPTION` rather
 * than throwing. The ownership check runs only after the record is confirmed cancelable, so a
 * missing or canceled id gets that same answer for every caller and never leaks whether it exists.
 *
 * @see {@link https://economy-lab-docs.pages.dev/economy/reference/operations/cancel-subscription/
 *   Cancel subscription} for the cancel flow and ownership rules.
 */
export declare function cancelSubscription(operation: Operation, unit: Unit, ctx: Ctx): Promise<Outcome>;