Optimism
OP MainnetOptimism Mainnet
An Ethereum optimistic rollup operated by OP Labs — stewards of the OP Stack underlying Base, Mode, and many other L2s.
Optimism settles to Ethereum with a 7-day fraud-proof window. The OP Stack codebase has become the de-facto modular L2 framework. Hosts Aave v3, Velodrome, Synthetix; smaller stablecoin float than Arbitrum or Base today.
See on StableLens
/chain/optimism — live data, risk grade, and methodology citation.
Related terms
- Optimistic rollupAn L2 that posts state roots to L1 and assumes them valid unless a fraud proof is submitted within a challenge window.
- L2 (Layer-2)A scaling network that inherits security from an L1 by posting state roots back — rollups, validiums, plasma.
- BaseCoinbase's optimistic rollup built on the OP Stack — fastest-growing L2 by stablecoin yield surface.
- OP StackThe modular L2 framework maintained by OP Labs — underlies Optimism, Base, Mode, Worldchain, Mantle Sepolia, and 30+ others.