Hack Line Properties

Hack Line Properties, 2019, Ethereum DApp.

“Hack Line Properties” is a supposedly secure blockchain smart contract designed to allow only its owner to update the line stroke properties that it stores. But a common Ethereum code bug allows anyone who finds it to “hack” the contract and set the line properties themselves.

You can view it in an Ethereum-enabled browser here:


The source code for the series is available here: