Celo has officially transitioned from a standalone EVM-compatible Layer-1 (L1) blockchain to an Ethereum Layer-2 (L2), marking a significant milestone for the blockchain ecosystem. The network first proposed the migration two years ago, intending to enhance security, real-world Ethereum use cases, and developer experience. Celo’s Migration to Ethereum Layer 2 Celo finalized its migration to an Ethereum Layer-2 network on Wednesday, utilizing Optimism’s OP Stack and EigenDA for data availability. The upgrade, which was completed at block height 31,056,500, strengthens Celo’s security
source: https://beincrypto.com/celo-ethereum-layer-2-transition/