Solidity Coding Standards

The purpose of this article is not to rehash the official Solidity Style Guide, which you should read. Rather, it is to document the common deviations from the style guide that come up in code reviews or audits. Some of the items here are not in the style guide, but are common stylistic Solidity developer mistakes.

First two lines

1. Include SPDX-License-Identifier

Of course your code will compile without it, but you’ll get a warning, so just make the warning go away.