Optimism launched permissionless fraud proofs, advancing towards Stage 1 decentralization by allowing all users to contest transactions. However, after community audits revealed several security vulnerabilities, the network reverted to a permissioned state as a precaution, though no user assets were at risk. An upgrade named "Granite," which includes a low-risk, unaudited hard fork, is scheduled for September 10 to address the issues and enhance network stability. Source: The Block
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