import { type SwapLifecycleEvent } from '@layerswap/widget-types';
import type { SwapLifecycleContext } from '../lib/swapLifecycle';
/** Identity fields of an effect-driven observation; context (swapId, addresses, …) is passed separately and never re-triggers emission. */
export type ObservedLifecycleEvent = Omit<SwapLifecycleEvent, keyof SwapLifecycleContext>;
/**
 * Emits an effect-driven lifecycle observation once per transition of its
 * observation fingerprint (the same fingerprint every consumer dedupes on, see
 * `lifecycleObservationFingerprint` in @layerswap/widget-types).
 * Context/enrichment arriving later (swap id, source address, confirmations)
 * never re-emits; the latest context is spread in at emission time.
 *
 * Emission is synchronous inside a passive effect so a child's deferred
 * `transfer_blocked` (useTransferBlocked) still follows the parent's phase.
 */
export declare function useLifecycleObservation(observation: ObservedLifecycleEvent | undefined, context: SwapLifecycleContext | undefined): void;
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