apiSaga.js

import { select, put } from 'redux-sagas/effects';
import { requestType, success } from './actions';
import apiGenerator from './apiGenerator';

function* fetchGlobalData({
payload: { startDate } }) {
  const api = yield select(apiGenerator);
  
  const response = yield api.fetchHistoricalData(startDate);
  
  yield put success(response);
}

return yield all([
  takeLatest(requestType, fetchGlobalData);
])