daddy/client/src/store/reducers/root.ts

import { combineReducers } from 'redux';
import { flagsReducer, FlagsState } from './flags';
import { authReducer, AuthState } from './auth';

export interface RootState {
  auth: AuthState,
  flags: FlagsState,
}

export const rootReducer = combineReducers({
  flags: flagsReducer,
  auth: authReducer,
});