Odaily Planet Daily News: Ethereum Layer2 protocol Loopring posted on X platform that due to a recent security vulnerability in Loopring's two-factor authentication (2FA) service, the automatic smart contract upgrade originally scheduled for June 12 on the Ethereum mainnet has been postponed. The upgrade will be carried out later and the upgrade date will be announced in advance. Please note that this security vulnerability does not affect the security of our smart contracts. Both existing and new smart contracts remain secure.