Optimism approves Upgrade 20 to prepare for Superchain interoperability
CryptoSlate says testnet contracts were set to upgrade September 17, 2026, with mainnet targeted for September 24 if the seven-day test run stays healthy.
TLDR
CryptoSlate reports that Optimism approved Upgrade 20, moving its fault-proof system onto the architecture needed for future Superchain interoperability. The outlet says testnet contracts were scheduled to upgrade September 17, 2026. The mainnet rollout was targeted for September 24, conditional on a healthy seven-day test run.
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