Blockchain
zkSync
An Ethereum Layer 2 using Zero-Knowledge proofs for fast settlement and mathematically proven correctness.
Last Updated
2026-03-29
Related Concepts
What is zkSync?
zkSync is a ZK-Rollup that proves every transaction mathematically correct using zero-knowledge proofs before settling on Ethereum. Unlike optimistic rollups that assume validity, zkSync proves it.
How does zkSync work?
- Transactions are collected and batched off-chain.
- Zero-knowledge proofs are generated proving all transactions are valid.
- Proofs are posted to Ethereum, which verifies them cryptographically.
- Once verified, state is final withdrawals take minutes instead of 7 days.
Why does zkSync matter?
ZK proofs provide immediate mathematical finality, eliminating the 7-day fraud proof window of optimistic rollups. Users can withdraw funds to Layer 1 in minutes rather than waiting a week.
Key features of zkSync
- Cryptographic proof of correctness no fraud window needed
- Withdrawals in minutes versus 7 days for optimistic rollups
- Full EVM compatibility in zkSync Era
- Higher proving costs offset by faster finality and security
Examples of zkSync
Transferring funds on zkSync settles in minutes with mathematical certainty. Major DeFi protocols like Uniswap and Aave have deployed on zkSync Era to offer users faster, cheaper transactions with ZK security.