index.js.flow

// @flow
/*
 * You need redux type definition.
 *
 * npm install -g flow-typed
 * flow-typed install -f 0.30 redux@3.5.2
 *
 */

declare type State = Object;
declare type Action = { type: $Subtype<string> }
declare type Reducer<State, Action> = (state: State, action: Action) => State;
declare type Reducers = {[key: $Keys<State>]: Reducer<any, Action>}

declare export default function better(original: Function): (reducers: Reducers, initialState: State) => Reducer<any, any>;