Zigzag Exchange — the L2 DEX built on zkSync and Starknet

Zigzag Exchange is an Ethereum Layer 2 (L2) decentralized exchange (DEX) built on blockchains utilising Zero Knowledge (ZK) rollups.

ZK rollups quick primer

ZK rollups are a superior form of Ethereum scaling technology which will bundle transactions on Ethereum L2 leading to quicker transaction speeds and negligible fees.

As a recap, rollups are scaling solutions that perform transaction computation outside the main Ethereum chain (i.e. L2) but post transaction data on L1. As the data lives on L1, it is considered secured by L1, inheriting its security properties.

There are two forms of rollups with different security models, optimistic rollups and ZK rollups.

Compared to Optimistic rollups, ZK rollups are less vulnerable to economic attacks that Optimistic rollups are vulnerable towards since the state is instantly verified and sent to Layer 1.

They also do not require a challenge period and hence allow for fast withdrawals to Layer 1, meaning they are great for exchanges and other apps that require simple payments.