Slow Fog's Yu Xian: The BitmapPunks contract, which is currently raising Ethereum Gas fees, has not been open-sourced for verification, and the risks are currently unknown.

Foresight News reported that Yu Xian, the founder of Slow Fog, tweeted that "BitmapPunks, which is currently raising Ethereum Gas fees, is indeed a fully-onchain, ultra-large, hybrid collection. However, the contract hasn't been open-sourced for verification, and I haven't looked closely at whether there are any risks."