Made a toy to predict NFT

self.ethereum7d ago
It seems that devs not taking enough care about the randomness. Many NFT are predictable and simply protected by the lacking of good decompiler, such ones can be analyzed with this toy. It traces SHA3 and shows the input parameter, once you know their algo, you can predict it. If you know how to send Tx, you can do that with this toy: Besides the oracles, what is the best way to make it more random? Is that two-step logic? That the first step saves ‘block.hash‘ and the second step use that hash to calculate SHA3?