Mitigation Confirmed for GAS

[code423n4]

Issue #21

KBC-01G - cBond changed from memory to calldata. No new issue created.

KBC-02G - redeem now only loads the parentId into memory instead of the entire cBond. No new issue created.

KIB-01G - _allowances is private and never used so it has been removed. No new issue created.

KIB-02G - this.balanceOf(to) changed to balanceOf(to) in 4 locations. No new issue created.

KFC-02G - i is incremented inside an unchecked block. Since i is only used to track the number of loops, the change is safe and no new issues have been created.

KFC-03G - It appears that this was meant to reference KFC-04G instead of KFC-03G because no changes have been made to address this.

KFC-04G - Storage variables are only written once at the end of instead of each loop. No new issue created.

KBT-01G - _beforeTokenTransfer is overriden instead of transferFrom and safeTransferFrom. This applies the appropriate modifiers to ALL transfers. No new issues created

KBT-02G - _msgSender() change to msg.sender at all instances. No new issues created

MAR-01G - startedAt now returns _updatedAt. startedAt is unused elsewhere so no new issues created.

KSP-01G - variable names of unused variables in onERC721Received have been removed. Since they are never used no new issues created.

[c4-judge]

GalloDaSballo marked the issue as satisfactory