  function _validateCommitment(
    RouterStorage storage s,
    IAstariaRouter.Commitment calldata commitment,
    uint256 timeToSecondEpochEnd
  ) internal view returns (ILienToken.Lien memory lien) {
    if (block.timestamp > commitment.lienRequest.strategy.deadline) {
      revert InvalidCommitmentState(CommitmentState.EXPIRED);
    }
// ...
  function _validateCommitment(
    IAstariaRouter.Commitment calldata params,
    address receiver
  ) internal view {
    uint256 collateralId = params.tokenContract.computeId(params.tokenId);
    ERC721 CT = ERC721(address(COLLATERAL_TOKEN()));
    address holder = CT.ownerOf(collateralId);
    address operator = CT.getApproved(collateralId);
    if (
      msg.sender != holder &&
      receiver != holder &&
      receiver != operator &&
      !CT.isApprovedForAll(holder, msg.sender)
    ) {
      revert InvalidRequest(InvalidRequestReason.NO_AUTHORITY);
    }
    VIData storage s = _loadVISlot();
    address recovered = ecrecover(
      keccak256(
        _encodeStrategyData(
          s,
          params.lienRequest.strategy,
          params.lienRequest.merkle.root
        )
      ),
      params.lienRequest.v,
      params.lienRequest.r,
      params.lienRequest.s
    );
    if (
      (recovered != owner() && recovered != s.delegate) ||
      recovered == address(0)
    ) {
      revert IVaultImplementation.InvalidRequest(
        InvalidRequestReason.INVALID_SIGNATURE
      );
    }
  }
