Smart Contract Security in Solidity

This article serves as a mini-course on smart contract security and provides an extensive list of the issues and vulnerabilities that tend to recur in Solidity smart contracts.

A security issue in Solidity boils down to smart contracts not behaving the way they were intended to. This can fall into four broad categories:

• Funds getting stolen
• Funds getting locked up or frozen inside a contract
• People receive less rewards than anticipated (rewards are delayed or reduced)