import { SetStateFunction, Store } from '../types';
export interface OptimisticOptions<T> {
    commit: (nextState: T, prevState: T) => Promise<void> | void;
    onRollback?: (prevState: T, nextState: T, error: unknown) => void;
    onCommit?: (committedState: T) => void;
    rollbackStrategy?: 'snapshot' | 'replay';
}
export interface OptimisticStore<T> extends Store<T> {
    optimistic: SetStateFunction<T>;
    isPending: () => boolean;
    pendingCount: () => number;
}
export declare function optimisticMiddleware<T>(options: OptimisticOptions<T>): (store: Store<T>) => OptimisticStore<T>;