The team behind the upcoming zkSync has announced a new security mechanism called "execution delay" as part of their multiple layers of security for their Full Alpha Mainnet launch. The mechanism aims to safeguard users' funds in the initial days of the protocol, where the probability of existing bugs is higher than the probability of malicious actors.
The execution delay means that each L2 block committed to L1 will have a time lock before it is executed and finalized. Initially, the delay will be 24 hours, which will be gradually decreased as the system matures until the Alpha label is removed, at which time the delay will be removed altogether. Changing the delay requires multiple signatures collected from several cold wallets owned by zkSync leadership.
This delay will allow the team to prevent a quick drain of the protocol in the case a critical bug were to be discovered and exploited. The zkSync team will be monitoring each block and be able to investigate any anomalies and red flags such as rapid outflow or unusually large withdrawals.
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