This prevents entities which know the invoice hash (like all LN nodes on the payment path) from using the invoice hash on SN.
Only the user which created the invoice knows the HMAC and thus can use the invoice hash.
Support an optional debounce prop on Input component
If provided, the debounce is applied to the validation of the containing form,
imperatively invoking form validation after debounce is finalized
Also required introducing the `validateOnChange` prop on `Form` which gets passed to `Formik`, and defaults to true, just as it does in `Formik`.
Imperatively invoking form validation seemed to be the only way to debounce the validation call through formik.
Most browsers don't support the pushsubscriptionchange event.
We workaround this by saving the current push subscription in IndexedDB so we can check during every page load if the push subscription changed.
If that is the case, we manually sync the push subscription with the server.
However, this solution is not perfect as mentioned in https://medium.com/@madridserginho/how-to-handle-webpush-api-pushsubscriptionchange-event-in-modern-browsers-6e47840d756f which was used for reference:
> This solution is not perfect, the user could lose some push notifications if he doesn’t open the webapp for a long time.
Co-authored-by: ekzyis <ek@stacker.news>
Our invoice IDs can be enumerated.
So there is a - even though very rare - chance that an attacker could find a paid invoice which is not used yet and use it for himself.
Random payment hashes prevent this.
Also, since we delete invoices after use, using database IDs as proof of payments are not suitable.
If a user tells us an invoice ID after we deleted it, we can no longer tell if the invoice was paid or not since the LN node only knows about payment hashes but nothing about the database IDs.
