Optimistic cross-chain bridge protocol
Across is an optimistic cross-chain bridge protocol that enables users to execute transactions between chains almost instantly. This is achieved through the use of an optimistic oracle, bonded relayers, and single-sided liquidity pools.
According to on-chain analyst PeckShield (@PeckShieldAlert), the KelpDAO attacker has transferred ETH from Ethereum to Arbitrum via the Across Protocol, swapped it for USDT, and then routed the funds to TRON DAO via LayerZero.