What are the differences between optimistic rollups and zk-rollups?

What are the differences between optimistic rollups and zk-rollups?

Optimistic rollups assume transactions are valid by default and only check them if challenged, while zk-rollups use zero-knowledge proofs to validate transactions instantly.

Which one is more secure?

Zk-rollups are generally considered more secure because they provide cryptographic proofs for each transaction, making it harder to commit fraud.

What are the advantages of using optimistic rollups?

Optimistic rollups can offer lower costs and faster transaction speeds since they don't require complex proofs for every transaction.

Can you give examples of projects using these technologies?

Sure! Optimistic rollups are used by projects like Optimism and Arbitrum, while zk-rollups are utilized by zkSync and StarkWare.

Which one should I choose for my project?

It depends on your project's needs. If you prioritize security and scalability, zk-rollups might be better. For lower costs and faster deployment, consider optimistic rollups.