How do you properly implement optimistic updates using Riverpod, immediately updating your interface before an actual backend confirmation genuinely arrives, then properly rolling back that particular change if the request genuinely happens to fail?

An optimistic update immediately and proactively updates your locally held provider state to reflect what the genuinely expected successful outcome should actually look like, before the actual corresponding backend request has genuinely even actually finished, providing a genuinely much more responsive, considerably snappier feeling user experience, and if that particular underlying request genuinely later happens to fail, your code properly catches that specific error and correctly reverts your local state back to its own previous value, along with appropriately notifying the user that particular action genuinely did not actually succeed after all.

void toggleLike() async {
  final previousState = state;
  state = state.copyWith(isLiked: !state.isLiked);
  try {
    await api.toggleLike(postId);
  } catch (e) {
    state = previousState;
  }
}