Starknet

Starknet is a permissionless, Validity-Rollup, also known as a zero-knowledge rollup (ZK rollup) for Ethereum. It operates as a Layer 2 (L2) blockchain, enabling any dApp to achieve massive scale for its computation without compromising on Ethereum’s composability and security.

Starknet aims to achieves secure low cost transactions and high performance by using the STARK cryptographic proof system. Starknet contracts and the Starknet OS are written in Cairo, a custom-built and specialized programming language.