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 and only check them if challenged, while zk-rollups use zero-knowledge proofs to validate transactions off-chain.

Which one is more secure?

Zk-rollups are generally considered more secure due to their cryptographic proofs, which ensure transaction validity without needing to trust the data.

What are the scalability benefits of each?

Both improve scalability, but optimistic rollups can achieve higher throughput since they don't require immediate proof generation, while zk-rollups can reduce on-chain data significantly.

Are there any downsides to using zk-rollups?

Yes, zk-rollups can be more complex to implement and may have higher computational costs due to the cryptographic proofs.

Which one should I choose for my project?

It depends on your project's needs. If you prioritize security and can handle complexity, zk-rollups are great. For simpler, faster solutions, consider optimistic rollups.