import { type JourneyRuntime } from './runtime';
import { type JourneyDef, type JourneyState, type SerializedJourneyState } from './types';
/**
 * @internal Project an open {@link JourneyState} into a plain, JSON-safe
 * {@link SerializedJourneyState} that can ride a cookie across page navigations.
 * The step projection mirrors `finish()`; `startedAt` (a `performance.now()`
 * monotonic stamp) is bridged to a wall-clock epoch so it survives the page
 * load where `performance.now()` resets.
 */
export declare function projectJourneyState(journey: JourneyState): SerializedJourneyState;
/**
 * @internal Rehydrate a {@link SerializedJourneyState} into a live
 * {@link JourneyState} bound to the supplied runtime. `startedAt` is rebased
 * from the wall-clock epoch back to a `performance.now()` monotonic stamp,
 * `StepRecord[]` is rebuilt with re-linked circular references, and the
 * `JOURNEY_ENGINE` hook is re-bound so HTTP attribution works on the new page.
 */
export declare function deserializeJourneyState(serialized: SerializedJourneyState, config: JourneyDef, api: JourneyRuntime, defaultJourneyIdleMs: number): JourneyState;
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