A simple precommit hook that checks for the presence of an Ethereum private key in your codebase.

1. Install the package

yarn add -D priv-key-precommit

2. Create a script in your package.json

"scripts": { "priv-key-check": "priv-key-precommit" }

3. Install husky (or a similar pre-commit hook manager)

npx husky-init && yarn

4. Edit the contents of .husky/pre-commit

#!/bin/sh . "$(dirname "$0")/_/husky.sh" npm run priv-key-check

5. Try commiting your code. It won't let you commit your code if it finds a private key in your codebase.

❯ git commit -m 'test' > priv:check > priv-key-precommit 🚨 Found 1 instance(s) of private keys. Aborting commit. => .env.example husky - pre-commit hook exited with code 1 (error)