Question 1

How to prevent reentrancy attacks in EOS smart contracts?

Accepted Answer

The guide advises maintaining internal balance tables and avoiding cross-contract table queries. For instance, in the wram example, use deferred actions or ensure data consistency to prevent multiple mint calls from exploiting asynchronous operations.

Question 2

What are the most common EOS smart contract vulnerabilities?

Accepted Answer

Based on the guide, frequent issues include integer overflow, permission validation flaws, fake transfer notifications, rollback attacks, and insecure random number generation, each documented with real cases like EOSBet and EOSDice hacks.

Question 3

EOS security best practices vs Ethereum: what's the difference?

Accepted Answer

EOS has unique aspects like apply校验 for action validation and deferred transactions, requiring specific defenses not covered in Ethereum guides. This resource focuses on EOS-specific pitfalls, whereas Ethereum security often deals with gas limits and Solidity quirks.

Question 4

How can I audit my EOS contract using this guide?

Accepted Answer

Review each vulnerability section, compare your code with the flawed examples provided, and implement the defensive methods. Also, check the real-world cases to understand attack execution and apply similar checks in your audit process.

Question 5

What tools work with this guide for EOS security testing?

Accepted Answer

While the guide is manual, it complements tools like EOSIO.CDT for compilation and community scanners, but emphasizes code review and best practices over automation, so pair it with thorough testing and peer reviews.

Question 6

How to handle random numbers securely in EOS contracts?

Accepted Answer

Avoid predictable seeds like account balances; use official examples or deferred actions. The guide warns against flaws in examples like EOSDice, where inline actions could manipulate results, and recommends relying on trusted patterns.

EOS Smart Contract Development Security Best Practices

What is EOS Smart Contract Development Security Best Practices?

Overview

Use Cases

Best For

Found a gem we're missing?

Not Ideal For

Pros & Cons

Pros

Cons

Frequently Asked Questions