OP Stack
The modular L2 framework maintained by OP Labs — underlies Optimism, Base, Mode, Worldchain, Mantle Sepolia, and 30+ others.
OP Stack standardises the rollup contracts, derivation pipeline, and sequencer. Chains built on OP Stack inherit upgrades centrally, lowering per-chain maintenance burden. The "Superchain" thesis: shared sequencing, native interop, shared security.
Related terms
- OptimismAn Ethereum optimistic rollup operated by OP Labs — stewards of the OP Stack underlying Base, Mode, and many other L2s.
- 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.