Uniswap Labs announces Unichain, a DeFi-focused Ethereum rollup

Uniswap Labs/Unichain

Uniswap Labs announced Unichain, an Ethereum layer-2 network on the OP Stack, with testnet live immediately. It launched with 1-second blocks, planned 250 ms sub-blocks, and a block builder in secure hardware (with Flashbots) for transparent ordering. Fees were ~95% below Ethereum.

• 1-second blocks initially; planned 250 ms sub-blocks for near-instant user experience.
• Block builder runs in TEE (with Flashbots) for transparent transaction ordering; reduces MEV.
• Built on OP Stack; planned Superchain interoperability and permissionless fault proofs from launch.
• Testnet fees ~95% below Ethereum L1; aims to be a home for DeFi and on-chain liquidity.