What are the differences between various rollups in blockchain?

What are the differences between various rollups in blockchain?

There are mainly two types of rollups: optimistic and zk-rollups. Optimistic rollups assume transactions are valid by default, while zk-rollups use zero-knowledge proofs to ensure validity.

Can you explain how optimistic rollups work?

Sure! Optimistic rollups bundle multiple transactions off-chain and submit them to the main chain. They assume transactions are valid, but anyone can challenge them within a certain period.

What about zk-rollups? How do they differ in terms of security?

zk-rollups provide higher security as they use cryptographic proofs to validate transactions. This means that the main chain only needs to verify the proof, making it more efficient.

Which rollup is better for scalability?

Both rollups improve scalability, but zk-rollups tend to offer better performance due to their proof system, reducing the data that needs to be posted on-chain.