import type { FlowSubject } from '../FlowSubject';
import type { Action, Effect, ActionType, ExtractAction } from '../types';
/**
 * React hook that attaches a side-effect to a {@link FlowSubject}, filtered
 * by a specific action type.
 *
 * @template S - The state type.
 * @template A - The action type.
 * @template TType - The specific action type to listen for.
 * @param subject - The `FlowSubject` to attach the effect to.
 * @param type - The action type string to filter on.
 * @param effect - The effect function invoked for each matching action.
 */
export declare function useObservableEffect<S, A extends Action = Action, TType extends ActionType<A> = ActionType<A>>(subject: FlowSubject<S, A>, type: TType, effect?: Effect<ExtractAction<A, TType>, S>): void;
/**
 * React hook that attaches a side-effect to a {@link FlowSubject} for all actions.
 *
 * @template S - The state type.
 * @template A - The action type.
 * @param subject - The `FlowSubject` to attach the effect to.
 * @param effect - The effect function invoked for each dispatched action.
 */
export declare function useObservableEffect<S, A extends Action = Action>(subject: FlowSubject<S, A>, effect: Effect<A, S>): void;
export default useObservableEffect;