Type of the reaction to set; pass null to remove the reaction. Custom emoji reactions can be used only by Telegram Premium users. Paid reactions can't be set.
The identifier of the story.
The identifier of the poster of the story.
Optional update_Pass true if the reaction needs to be added to recent reactions.
Changes chosen reaction on a story that has already been sent; not supported for live stories. Request type for Tdjson#setStoryReaction.