Hi, I know randoms in EVM are not secure, and its better to use a oracle for that, i'm trying to reduce costs for a project when pure randomness is not required. Since on bsc there are just a few validators and setting up a validator node is not an easy and cheap task, would be sha3 random with block data be "secure enough", if I dont get it wrong the POS make the attack much more expensive in that case right? I was thinking on using a metatransaction with the seed signed by a wallet that I control and then verify the signature on the contract and extract the seed