zkRollup Exchange and Payment Protocol. Loopring allows anyone to build high-throughput, non-custodial, orderbook-based exchanges on Ethereum by leveraging Zero-Knowledge Proofs. Loopring's zkRollup L2 solution offers the same security guarantees as Ethereum mainnet, with a big scalability boost: throughput increased by 1000x, and cost recuced to just 0.1% of L1.