Optimism is expanding its role as the operator of Ethereum-based chains for other brands. Unichain, Uniswap Labs' Ethereum layer-2 chain, plans to transfer its production sequencing, public node access, monitoring and incident response to Optimism under its October 9 migration announcement.

The planned testnet move on Oct. 13 and mainnet move on Oct. 29 extend the operating strategy set out by Jing Wang in Optimism's Ink announcement: product teams build their applications and ecosystems while Optimism runs the infrastructure beneath them. Soneium's September agreement follows the same division of labor as Ink's earlier June plan; both chains use the OP Stack.

For users, the consequence reaches beyond who answers an outage call. A common provider can bring protocol expertise and coordinated maintenance, but it also becomes a common organizational dependency. Each chain's deployed contracts determine whether users can get a transaction included and recover funds during a provider failure.

Unichain already had an OP Enterprise relationship. Optimism's enterprise introduction, in its version updated July 31, says Uniswap Labs operates Unichain with the Mission Critical add-on. Read alongside the October announcement, the change is an expansion from support into responsibility for production operations.

Uniswap Labs says the migration preserves the chain ID, contracts, balances, applications and Uniswap v2, v3 and v4 deployments. It also says Unichain remains a Stage 1 rollup with permissionless fault proofs and its existing contract-upgrade governance. The production operator changes while the chain and its upgrade authorities remain in place.

Soneium's Sept. 30 announcement assigns the Optimism Foundation and OP Labs support for deployment, sequencer operations, node infrastructure, upgrades, monitoring and incident response.

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