Layer 2 (L2)
Protocol
Scaling networks built atop Layer 1.
L2 networks scale by running most work off chain and anchoring results to L1. Families include optimistic and ZK rollups, plus related designs like validiums and channels.
Frequently asked questions
How are L2s different from sidechains?
L2s inherit security from L1 by posting data/proofs there. Sidechains use their own validators and trust models.Can I use the same wallet on L2?
Yes. Most L2s share the same address format. Switch networks in your wallet and bridge funds.What are withdrawal times?
Optimistic rollups have challenge periods. ZK rollups are typically faster after proofs verify.