Updated: Mysten Labs officials urgently submitted a pull request (PR) for a whitelist feature, but later closed it, indicating they are exploring new recovery approaches. According to @0x_Todd, this whitelist function would allow the team to pre-construct a specific "recovery transaction" in the future to retrieve funds or facilitate their return by hackers. The whitelist feature does not directly seize hackers' funds unless a separate recovery module (with system-level privileges) is deployed and the upgrade transaction is added to the whitelist.