Redux simple explanation

dispatch.js

store.dispatch({
  type: 'OPEN_NFE_VISUALIZATION',
  accessKey: 123
})

store.dispatch({
  type: 'CLOSE_NFE_VISUALIZATION'
})

reducer.js

function nfeList(state = {}, action) {
  switch (action.type) {
    case 'OPEN_NFE_VISUALIZATION':
      return {
        ...state,
        nfeIsOpen: true,
        nfeTargetAK: action.accessKey
      }
    case 'CLOSE_NFE_VISUALIZATION':
      return {
        ...state,
        nfeIsOpen: true,
        nfeTargetAK: -1,
      }
    default:
      return state
  }
}

state.js

console.log(store.getState())

/* Console Output
{
  data: [{
    accessKey: 123,
    cnpj: "00.000.000/0000-00",
    value: 100.00
  }, {
    accessKey: 124,
    cnpj: "00.000.000/0001-00",
    value: 200.00
  }],
  nfeIsOpen: false,
  nfeTargetAK: -1,
}
*/