First Flash Loan Attack on BSC: Same Old Tricks in New Form, How Should DeFi Lego Respond?

In the DeFi world, with the help of smart contracts, the threshold for individuals to create financial products has been significantly lowered. People can freely design their own financial products according to their needs and achieve convenient trading through combinations. Currently, as DeFi protocol combinations become increasingly rich, a large number of "money lego" protocols have emerged, from Uniswap, the first-generation decentralized exchange in the Ethereum ecosystem, to the second-generation evolution Sushiswap, and then to PancakeSwap in the Binance Smart Chain ecosystem. However, risks in the combination process are gradually becoming apparent.