Ethereum's second-layer solution Optimism tweeted: "The official date for the OP mainnet upgrade to Bedrock has been confirmed: 16:00 UTC on June 6 (00:00 Eastern Time on June 7), the upgrade will require the OP mainnet to be shut down for 2-4 hours. On the day of the upgrade, transactions, deposits and withdrawals will not be possible during the downtime, and the OP mainnet chain will stop running. Node operators need to start a new node deployment for Bedrock."

It is reported that Bedrock is a new generation of decentralized Rollup infrastructure developed by OP Labs, which aims to provide modularity, simplicity and Ethereum equivalence for Layer2 networks.