Root + Impact

Description

The contract defines two settlement functions:

Both functions finalize the auction by calling _executeSale(tokenId).

settleAuction can be called by anyone once the auction ends.

takeHighestBid can be called by the seller before auction end, but the only additional check is bid.amount >= minPrice, which settleAuction also enforces.

This makes takeHighestBid redundant, since the same outcome can be achieved via settleAuction with less surface area.

Impact:

Increased contract size and gas costs.

Unnecessary complexity in auction settlement logic.

Proof of Concept

Ensure

Call _executeSale(tokenId) to transfer the asset and settle payment.
Thus, their outcome is effectively identical.

Recommended Mitigation

Remove takeHighestBid() entirely and rely on settleAuction() for auction finalization.
If early settlement by the seller is required as a feature, explicitly separate its logic and document how it differs from the standard settlement.