Blockchains and smart contracts cannot guarantee randomness, but Chainlink Verifiable Random Function can, and its version 2 can reduce transaction fees by 60%.
https://buff.ly/3gN4DLP
区块链和智能合约不能保证随机性，但Chainlink可验证随机功能可以，其版本2可以将交易费用降低60%。
https://buff.ly/3gN4DLP