const requestFx = createEffect<
  LognexRequest<QrDataBody>,
  QrDataResponse,
  TypeError
>({
  async handler({ path, method, body }) {
[...]

export const requestQr = attach<QrDataBody, typeof requestFx>({
  effect: requestFx,
  mapParams: (body) => ({
    method: 'POST',
    path: 'payment/qr',
    body,
  }),
});

$qrData.on(requestQr.doneData, (data) => {
  return data;
});

$qrData.on(requestQr.doneData, (state, data) => {
  return data;
});

$qrData.on(requestQr.doneData, (state, data) => {
  return data;
});