ethereum-optimism/optimism op-contracts/v8.0.0-rc.3

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Overview

This is a release candidate of the OP Stack smart contracts for Upgrade 20 (U20). Note that U20 does not include a hard fork so L2 predeploy changes will not be deployed.

Changes new since op-contracts/v8.0.0-rc.2 are marked [new in rc.3].

What's Changed

OP Contracts Manager and upgrade path

• OPCM v8.0.0 (#22096): the PermittedProxyDeployment allowance for DelayedWETH is removed from upgrade instructions, the startingAnchorRoot override window moves to pre-9.0.0 releases, and upgrade-sequence enforcement is now active — upgrades revert unless the chain's last upgrade was applied by an OPCM 7.x.
• Upgrades now resolve each proxy's own ProxyAdmin and SystemConfig instead of assuming the calling chain's, fixing upgrades for non-first member chains of an interop set (#22034).
• Upgrades revert if the new implementation is an OZ v5-style Initializable with its storage slot in use (#21070).
• Removed the ProtocolVersions contract and its OPCM integration (#20527).
• [new in rc.3] Chain deployment reverts on game config mismatches instead of silently promoting them to Super Games (#22128).

Standard validator

• [new in rc.3] The validator now checks that the SystemConfig l2ChainId() matches the chain ID under validation (SYSCON-140) (#22366).
• [new in rc.3] The validator now checks that each registered dispute game implementation is the expected release implementation (-150 error codes for the Super Fault, Super Permissioned and ZK games), and that the ZK game verifier is the release-approved SP1 PLONK adapter (#22365, #22218).
• [new in rc.3] The validator now checks that the AnchorStateRegistry a game anchors against is the same registry the OptimismPortal consults when finalizing withdrawals (-70) (#22412).

Dispute games

• The proofs system now uses super roots instead of output roots. Permissioned chains now use the SUPER_PERMISSIONED game type as the respected game. Permissionless chains use SUPER_CANNON_KONA with previous game implementations being removed.
• Simplified the super permissioned dispute game (#20641), renamed its game type (#21513), and removed the super cannon game type (#20363).
• [new in rc.3] SuperPermissionedDisputeGame.initialize now reverts when sent ETH (#22410). The game has no bond accounting, so any value sent would have been trapped in the clone.

L1 contracts

• SystemConfig v4.0.0: removed the unused batchInbox() getter and the legacy setGasConfig function (#21641).
• CrossL2Inbox.validateMessage now reverts when executed by a deposit transaction, as defense in depth (#21693).
• OptimismPortal2.migrateToSharedDisputeGame now validates its inputs (#20928).
• FeeVault gains setWithdrawalRoute to update the recipient and withdrawal network atomically (#20982).
• SuperchainConfig is now marked audited (#21265).

L2 predeploys

Note: These changes will not be deployed to existing chains until the next hard fork, not as part of U20.

• L2 Fee values now have a setWithdrawalRoute(address,Types.WithdrawalNetwork) method - an atomic combination of the existing recipient and network setters.

Other

• [new in rc.3] Fork.INTEROP is renamed to Fork.LAGOON in the L2 genesis scripts (#22157, #22161). This is a naming change only and affects no deployed contract.

Contract version changes

Versions that changed between rc.2 and rc.3 are marked [new in rc.3].

Full Changelog: op-contracts/v7.0.0...op-contracts/v8.0.0-rc.3