import React, { Reducer, ReducerState, ReducerAction, Dispatch } from 'react';
import { Saga, RunSagaOptions } from 'redux-saga';
declare type SagaIOKeys = keyof Pick<RunSagaOptions<any, any>, 'channel' | 'dispatch' | 'getState'>;
declare type ExposedRunSagaOptions<A, S> = Omit<RunSagaOptions<A, S>, SagaIOKeys>;
interface SagaProdiderProps extends ExposedRunSagaOptions<any, any> {
}
/**
 * Passes values into `runSaga` of each decendent `useSagaReducer` call.
 *
 * Methods are merged with local values, context methods are run first.
 * Context value is merged with local value, local values will override
 * existing properties.
 * @param props Optional saga options
 */
export declare const SagaProvider: React.FC<SagaProdiderProps>;
/**
 * Create an saga, disconnected from redux with its own state and dispatch.
 *
 * @see https://github.com/azmenak/use-saga-reducer
 * @example
 * ```
 * function* dataFetcher() {
 *   try {
 *     const data = yield call(API.fetchData)
 *     yield put({type: 'FETCH_SUCCESS', payload: data})
 *   } catch (error) {
 *     yield put({type: 'FETCH_ERROR'})
 *   }
 * }
 *
 * function* dataFetchingSaga() {
 *   yield takeLatest('FETCH', dataFetcher)
 * }
 *
 * function reducer(state = {}, action) {
 *   if (action.type === 'FETCH_SUCCESS') {
 *     return action.payload
 *   }
 *
 *   return state
 * }
 *
 * //...
 *
 * const [state, dispatch] = useSagaReducer(saga, reducer)
 * ```
 */
export declare function useSagaReducer<S extends Saga<never[]>, R extends Reducer<any, any>, I>(
/**
 * Saga method, called when the component mounts, must be a generator function.
 * Same as would be passed to reduxSaga.runSaga
 */
saga: S, 
/**
 * Reducer method, passed into React's `useReducer` method
 */
reducer: R, 
/**
 * Optional initalized argument, passed into React's `useReducer` method
 */
initializerArg?: I, 
/**
 * Store initialized function, passed into React's `useReducer` method
 */
initializer?: (arg: I) => ReducerState<R>, 
/**
 * Additional options passed into the `runSaga` method
 *
 * Supports:
 * ```
 * sagaMonitor // each monitor will run context methods then local methods
 * onError // runs context method then local method
 * context // merges context values into local values
 * effectMiddlewares // combines with context middleswares, running context first
 * ```
 * @see https://redux-saga.js.org/docs/api/#runsagaoptions-saga-args
 */
runSagaOptions?: ExposedRunSagaOptions<any, S>): [ReducerState<R>, Dispatch<ReducerAction<R>>];
/**
 * Helper function to create custom redux-saga effects
 * @param type unique type string
 * @param payload any object
 */
export declare function makeCustomEffect(type: string, payload: object): {
    '@@redux-saga/custom': boolean;
    combinator: boolean;
    type: string;
    payload: object;
};
export default useSagaReducer;