NGRX EFFECTS Type 'Observable<unknown>' is not assignable to type 'EffectResult<Action>' - ngrx

Question

what do i do wrong?
fetchEmail$ = createEffect(() => this.actions$.pipe(
ofType(RDX_EMAIL_CONFIRM_FETCH),
switchMap(ac => axios.post(axiosInstance.post('/api/email-confirm/check-email', {
email: ac.payload.email
}).then(res => {
return {
type: RDX_EMAIL_CONFIRM_FETCH_SUCCESS,
};
}).catch(err => {
return {
type: RDX_EMAIL_CONFIRM_FETCH_ERROR
};
})))
))
would noah like to call some api and return an action based on that?
unfortunatley has the following error
Type 'Observable<unknown>' is not assignable to type 'EffectResult<Action>'.
Type 'Observable<unknown>' is not assignable to type 'Observable<Action>'.
Type 'unknown' is not assignable to type 'Action'
here's my reducer maby the problem occurs here
Is it the actions payload definition?
import { createAction, createReducer, on, props } from '#ngrx/store';
import { tassign } from 'tassign';
export const RDX_EMAIL_CONFIRM_FETCH = 'RDX_EMAIL_CONFIRM_FETCH';
export const RDX_EMAIL_CONFIRM_FETCH_SUCCESS = 'RDX_EMAIL_CONFIRM_FETCH_SUCCESS';
export const RDX_EMAIL_CONFIRM_FETCH_ERROR = 'RDX_EMAIL_CONFIRM_FETCH_ERROR';
export const rdxEmailConfirmFetch = createAction(
RDX_EMAIL_CONFIRM_FETCH,
props<{email: string}>()
);
export const rdxEmailConfirmFetchSuccess = createAction(RDX_EMAIL_CONFIRM_FETCH_SUCCESS);
export const rdxEmailConfirmFetchError = createAction(RDX_EMAIL_CONFIRM_FETCH_ERROR);
const initialState = {
isFetch: false
}
export const emailConfirmReducer = createReducer(
initialState,
on(rdxEmailConfirmFetch, (state) => tassign(state, {
isFetch: true
})),
on(rdxEmailConfirmFetchSuccess, (state) => tassign(state, {
isFetch: false
})),
on(rdxEmailConfirmFetchError, (state) => tassign(state, {
isFetch: false
}))
)

Answer 1

You have to use RxJS of operator to convert it to observable, just like below.
fetchEmail$ = createEffect(() => this.actions$.pipe(
ofType(RDX_EMAIL_CONFIRM_FETCH),
switchMap(ac => axios.post(axiosInstance.post('/api/email-confirm/check-email', {
email: ac.payload.email
}).then(res => {
return of({
type: RDX_EMAIL_CONFIRM_FETCH_SUCCESS,
});
}).catch(err => {
return of({
type: RDX_EMAIL_CONFIRM_FETCH_ERROR
});
})))
))