Blockchain protocols

Discover key facts and figures about major blockchain protocols that are empowering transformations across industries.

A swift L2 optimistic rollup blockchain from core Ethereum developers.

Consensus	Proof-of-stake
Public / Private / Permissioned	Public
Smart contracts	Yes
Smart contract languages supported	Solidity, Vyper, Yul, Huff
Transaction privacy	No
Transaction visibility	All participants have access to all entries ever recorded.
Transaction ordering	The right to reorder transactions within an N-block window is auctioned off to the highest bidder. The winner of the auction has the right to reorder submitted transactions and insert their own, as long as they do not delay any specific transaction by more than N blocks.

Fault tolerance

A L2 validator follows the L1 chain, monitoring it for transaction batches and output commitments, then commits them to the chain state after a specific block. Both of these are submitted by the sequencer.