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Ethereum Smart Contract Security Best Practices

This document provides a baseline knowledge of security considerations for intermediate Solidity programmers. It is maintained by ConsenSys Diligence, with contributions from our friends in the broader Ethereum community.

Our amazing community has also provided translations in Chinese and Vietnamese.

Where to start?


This guideline is updated often, however, if you want to stay on top of the Smart Contract security news and developments sign up for the bi-weekly Smart Contract Security Newsletter.

Contributions are welcome!

Feel free to submit a pull request, with anything from small fixes, to full new sections. If you are writing new content, please reference the contributing page for guidance on style.

See the issues for topics that need to be covered or updated.

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