1. What is zkSync? zkSync is a Layer 2 scaling solution for Ethereum, developed by Matter Labs, a blockchain technology company based in Switzerland. Layer 2 solutions are protocols built on top of existing blockchains, designed to improve scalability and reduce transaction fees. zkSync uses zero-knowledge proofs (ZKPs) to enable fast and secure transactions on Ethereum. Zero-knowledge proofs are a cryptographic technique that allows one party to prove to another party that a statement is tru...