import { StateCreator } from '../../types';
import { SyncContext } from '../sync/syncEnhancer';
type WrappedOnRehydrateStorage<S> = (userCallback: ((state: S) => ((finalState?: S, error?: unknown) => void) | void) | undefined, syncContext: SyncContext | undefined) => (state: S) => (finalState?: S, error?: unknown) => void;
/**
 * Creates hydration-gating middleware that queues state updates until rehydration completes.
 *
 * **Before hydration**: Queues all `set()` calls and flushes them sequentially after rehydration.
 *
 * **After hydration**: Passes `set()` calls through synchronously without batching.
 *
 * This ensures persistence sees a fully rehydrated base state before applying queued updates,
 * while keeping in-memory state changes synchronous post-hydration.
 */
export declare function createHydrationGate<S>(stateCreator: StateCreator<S>): {
    hydrationPromise: () => Promise<void>;
    stateCreator: StateCreator<S>;
    wrapOnRehydrateStorage: WrappedOnRehydrateStorage<S>;
};
export {};
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