Another 1 Solution Layer 2 is zkSync, the project of Matter Labs, launched in June 2022 and ready to push zkSync 2.0 within these couple months.
zkSync is different from Arbitrum and Optimism at the Rollups system as zkSync uses Zero KnowLedge Proofs called ZK Rollups. This system was born with the proof-right or-wrong system without revealing the real data. Meanwhile the steps it works are the same: processing the transactions and store the data will be conducted off-chain before those data will be calculated and verified again on-chain.
zkSync doesn’t have a token at this moment but Matter Labs has planned to launch its own token also, you guys can get the lucky airdrop as Arbitrum.
Overall, ZK Rollups differentiates from Optimistic Rollups in the ankle of transactions and Zero KnowLedge Proofs that spends much resources. In returns zkSync delivers many times transactions multiplied by Optimistic Rollups including much decentralized.