Transit Swap, a cross-chain transaction aggregator of the cryptocurrency wallet Token Pocket, was attacked, and the loss may exceed 21 million U.S. dollars, of which about 16 million U.S. dollars were stolen from BNB Chain and about 4.1 million U.S. dollars were stolen from Ethereum. Transit Swap stated on Twitter 3 hours ago that the technical team has urgently suspended the service, and the contract level has been fully suspended, and no operations can be performed. We and security companies are tracking relevant data on the chain.