- checkState(!randomId && (id == null), "neither random ID or custom ID set");
- checkState(randomId && (id != null), "both random ID and custom ID set");
- checkState(sender != null, "sender must not be null");
- checkState(!currentTime && (time == 0), "neither current time or custom time set");
- checkState(currentTime && (time != 0), "both current time and custom time set");
+ checkState((randomId && (id == null)) || (!randomId && (id != null)), "exactly one of random ID or custom ID must be set");
+ checkState(senderId != null, "sender must not be null");
+ checkState((currentTime && (time == 0)) || (!currentTime && (time > 0)), "one of current time or custom time must be set");