Optimism is Ethereum, scaled.ethereum-optimism/optimism on GitHub
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Overview. [!IMPORTANT] This is the op-contracts release for Upgrade 21 (U21). It contains the Glamsterdam gas-constant changes to OptimismPortal2, SafeCall and the cross-domain messengers, ETHLockbox on every chain with lockbox-based pause resolution, interop…OP Stack release notes
Overview. [!IMPORTANT] This is an optional release for operators running v1.16.7, and a strongly recommended one for operators on v1.16.6 or earlier, because it also contains the eMudhra certificate authority fixes from v1.16.7.OP Stack release notes
Overview. [!IMPORTANT] This is a recommended release for all op-reth operators. It contains the update to reth v2.6.0, which removes the block access list flags and changes several defaults, the removal of v1 historical-proofs storage, a fix that makes op-reth…OP Stack release notes
Overview. [!IMPORTANT] This is a strongly recommended release for all op-node operators. It contains security fixes for the compromised eMudhra certificate authority (CVE-2026-111943) and other Go standard-library security fixes, a fix for the sequencer's L1 o…OP Stack release notes
Overview. [!IMPORTANT] This is a recommended release for all chains. It contains a derivation fix for malformed batches that only a faulty batcher could produce, stricter handling of execution errors, an EVM update, a TLS security fix, and preimage server fixe…OP Stack release notes
Overview. [!IMPORTANT] This is a recommended release for all op-challenger operators. It rebuilds the image on a patched base that resolves a zlib CVE, and includes groundwork for ZK proofs, which are not yet running in production. Other changes. ZK proofs.OP Stack release notes
Overview. [!IMPORTANT] This is a recommended release for all op-challenger operators. It fixes list-games against factories containing super permissioned games, tightens transaction decoding in the bundled kona-host, and updates the container base image to cle…OP Stack release notes
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