zkSync Era, the first zkEVM to launch to the public, will have an execution delay mechanism to mitigate security risks when it opens, according to an announcement.

The delay will lock each L2 block committed to L1 for 24 hours, giving enough time for the zkSync team to verify the effects of the transactions before they become final. The delay will be gradually decreased as the system matures until the Alpha label is removed, at which time the delay will be removed altogether.

"Execution delay means that each L2 block committed to L1 will have a time lock before it is executed and finalized. Initially that delay will be 24 hours, which will be gradually decreased as the system matures until we remove the Alpha label, at which time the delay will be removed altogether. Changing the delay requires multiple signatures collected from several cold wallets owned by zkSync leadership." zkSync Team explained in the announcement.

The mechanism is part of several safeguards that zkSync has put in place to ensure there is not a single point of failure.