  constructor(
    RNGInterface rng_,
    address owner_,
    uint64 sequencePeriod_,
    uint64 sequenceOffset_,
    uint64 auctionDurationSeconds_,
    uint64 auctionTargetTime_
  ) Ownable(owner_) {
    if (sequencePeriod_ == 0) revert SequencePeriodZero();
    if (auctionTargetTime_ > auctionDurationSeconds_) revert AuctionTargetTimeExceedsDuration(uint64(auctionTargetTime_), uint64(auctionDurationSeconds_));
+    if (auctionDurationSeconds_ > sequencePeriod_) revert AuctionDurationGteSequencePeriod(uint64(auctionDurationSeconds_), uint64(sequencePeriod_));
    sequencePeriod = sequencePeriod_;
    sequenceOffset = sequenceOffset_;
    auctionDuration = auctionDurationSeconds_;
    auctionTargetTime = auctionTargetTime_;
    _auctionTargetTimeFraction = intoUD2x18(convert(uint(auctionTargetTime_)).div(convert(uint(auctionDurationSeconds_))));
    _setNextRngService(rng_);
  }
