⚗️ This is a release candidate of the upcoming v1.5.1 release to unblock node operators using EL clients different from op-geth. It uses the correct Engine API call versions depending on the active fork.

We will conduct more internal testing before we promote this to the official latest release.

Please read the release notes of v1.5.0 for more background on Ecotone and required configuration changes for node operators.

What's Changed - op-node

• check prior fork consistently by @zhiqiangxu in https://github.com/ethereum-optimism/optimism/pull/9255
• op-node: genesis deduplicate json write by @tynes in https://github.com/ethereum-optimism/optimism/pull/9323
• fix(bootnode): disable req/response sync on bootnode p2p by @danyalprout in https://github.com/ethereum-optimism/optimism/pull/9298
• Use engine API that matches hardfork version by @ImTei in https://github.com/ethereum-optimism/optimism/pull/9253

Full Changelog (monorepo): https://github.com/ethereum-optimism/optimism/compare/op-node/v1.5.0...op-node/v1.5.1-rc.1