EOS smart contract bottom asset class has serious flaws, there is overflow risk in numerical calculation, the current 360Vulcan team Has been feedback to the EOS official vulnerability platform. This has something to do with the root cause of the overflow attack of the EOS Werewolf game that the slow fog security team warned on July 25th. After the werewolf team contacted the slow fog, the 360Vulcan team both audited the contract source and found that the asset calculation had the overflow. problem