rootSaga.js

import { all } from 'redux-saga/effects';
import saga1 from './saga1';
import saga2 from './saga2';
import { networkSaga } from 'react-native-offline';

export default function* rootSaga(): Generator<*, *, *> {
  yield all([
    fork(saga1),
    fork(saga2),
    fork(networkSaga, { pingInterval: 20000 }),
  ]);
}