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Optimism: The Superchain 16a upgrade is scheduled to be deployed to the mainnet on October 2, pending governance approval

2025-09-19 10:59:52
Collection

ChainCatcher message, Optimism stated on platform X that the Superchain 16a upgrade proposal will soon be submitted for execution after governance approval: it will be deployed to Superchain Sepolia on September 22 and to the Superchain mainnet on October 2. This is a maintenance upgrade that will replace U16 in a more secure and flexible manner.

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Optimism Superchain maintenance upgrade
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