🦼ZK-Rollups

Another form of rollups, ZK (zero knowledge)-rollups work differently than their optimistic counterparts. Validators on networks using this rollup verify all transactions are valid before relaying transaction bundles to the layers above. Essentially, ZK-rollups utilize ZK-proofs to attest to transaction validity.

This process involves validating transactions using privacy-enhancing technologies – validators on ZK-rollup protocols can verify transactions without knowing the details of said transactions, including amounts transferred or wallet addresses. Using ZK-related technology on these networks makes them attractive to users looking for privacy features.

Moreover, no challenge period exists since these solutions verify transactions before relaying them to other layers. Users can move their funds to layer 1s and withdraw them immediately. Still, ZK-rollups have their problems, mainly the increased computational power needed to generate ZK-proofs.