OP Mainnet
Optimism’s optimistic rollup network for Ethereum, delivering low-cost, high-speed transactions.
What is OP Mainnet?
OP Mainnet, launched in 2021 by OP Labs, is an EVM-equivalent optimistic rollup that batches transactions off-chain and posts data to Ethereum. It uses fraud proofs with a 7-day challenge window, securing over $10 billion in TVL and processing 50 million monthly transactions as of 2025.
As the core of the Optimism ecosystem, OP Mainnet powers dApps like Uniswap, with single-round fault proofs reducing confirmation times to 1 hour post-2024 upgrades. Its open-source nature has spawned 20+ chains in the Superchain.
Related Terms
Celestia DA
A modular data availability network that offloads DA from Ethereum's execution layers, enabling scalable rollups with low costs.
BTC Multiple
The ratio of Strategy's BTC NAV to its BTC $ Equity, indicating leverage in its Bitcoin treasury.
APY (Lending)
The annualized percentage yield in DeFi lending, accounting for interest compounding.
Liquidation
The process in DeFi where assets from an under-collateralized loan are sold to repay the borrowed amount, typically triggered automatically by smart contracts when collateral value falls below a required threshold.
Active Management Burden
The ongoing requirement for liquidity providers to monitor and adjust positions in DeFi to optimize returns and mitigate risks.
Block and Block Height
A block is a collection of transactions recorded on a blockchain, and block height is the sequential number of a block in the chain, starting from the genesis block.