NFTXFlexHook.sol

The NFTXFlexHook allows for a collection token to be paired against a whitelisted token other than the native pairing. As this is an Ownable and centralised whitelist we have assumed that all pair tokens that are approved are authentic and safe.

The flex hook does not implement depositFees, so no listing fees are ever queued against a flex pool. This means that the just-in-time liquidity issue reported in NFTXHookCore.sol does not affect flex pools. The [INFO] issues raised on that page do still apply.

It should be noted that the flex pools of a collection will continue to trade after the collection has been sunset. This is documented, and understood to be the desired functionality.