A QA engineer walks into a bar. Orders a beer. Orders 0 beers. Orders 99999999999 beers. Orders a lizard. Orders -1 beers. Orders a ueicbksjdhd.
First real customer walks in and asks where the bathroom is. The bar bursts into flames, killing everyone.
The (Not So) Smart Contract repo by @trailofbits is a great reference to look through. Here's how to avoid one of the Ethereum Solidity contract mistakes they identify there: https://t.co/ubIJwEk83j
"Always code as if the guy [or girl] who ends up maintaining, or testing your code will be a violent psychopath who knows where you live." Excellent article: https://t.co/ZD8azmA7fY