Flash loans are like lending on steroids, and they’ve taken the cryptocurrency world by storm. Here's how they work.In briefFlash loans are a type of uncollateralized lending that have become very popular in decentralized finance (DeFi).While they've proved popular, flash loan exploits have been used to attack vulnerable DeFi protocols and steal millions of dollars.To take out a normal loan, you need to provide proof of reserves, income, and more besides. Well, forget all that: flas...