#smart-contract-security

Solving Damn Vulnerable DeFi V4: Level 9- puppetV2

Challenge overview

What Really Happens When You Call a Smart Contract?

You’ve probably written something like this before.

The First Thing I Check When I See Division in Solidity

If you’ve spent time auditing smart contracts, you’ve probably noticed something. Division isn’t scary. But it deserves attention.

The Difference Between a Vulnerability and an Exploit

Why Every Security Researcher Must Understand This Fundamental Security Concept

How Smart Contracts Are Helping Businesses Automate Agreements

Business agreements have always been paper-heavy, slow, and dependent on multiple layers of human involvement. From legal reviews to manual…

Will Format Sample UK: Legal Requirements and Best Practices Explained

Planning for the future is one of the most responsible decisions a person can make. A properly prepared will helps ensure that your assets…

Why I Chose Smart Contract Security Over Traditional Cybersecurity

A personal journey to smart contract security, exploring why blockchain security may become one of the most important careers of the next…

Building VaultGuard: A Static Analyzer for ERC-4626 Exploits

From exploit research to working detection tools—how to architect a static analyzer that catches an entire class of DeFi vulnerabilities.

Incorrect Auction Termination Condition Causes Premature Auction End

Introduction

How Hackers Think in DeFi: A Deep Dive into Attacker Mindsets

How hackers think in DeFi: learn attacker mental models, exploit strategies, and how to design secure smart contracts against real world…

DeFi Vulnerabilities and Audits

Yes, You DO Need a Reentrancy Guard on ERC20 Transfers. No, It’s Not Insane.

The myth that “ERC20 transfers are safe from reentrancy” has drained more protocols in 2024–2025 than most people realize.

Balancer v2’s Overlooked Guard

Before we dig in, public forensics is still evolving. Early threads highlighted a check in the Vault’s manageUserBalance path; some…

Extropy Security Bytes: w35 2025

Welcome to week 35 of our security roundup.

Part 8: Defending Ethereum Smart Contracts Against Reentrancy Attacks

Introduction: The DeFi Trap That Shook Ethereum

Part 6: Outsmarting the Block Producers — Safeguarding Ethereum Smart Contracts Against Miner…

Introduction: The Hidden Influence of Block Producers

Smart Contract Development Cost and Time Estimates

Introduction

How to prevent randomness vulnerabilities in Solidity.

What is Randomness?

Smart contract security checklist 1️⃣-(Attacker’s Mindset): How Dust Transactions Can Deny Service…

Question: Is there a minimum transaction amount enforced?

Smart Contract Audit Services: What to Expect From Experts

Learn what to expect from expert smart contract audit services. Secure your project with a trusted smart contract development company…

My First Competitive Audit Experience: Insights from First Flight

Participating in my first, First Flight audit was a significant milestone in my journey as a smart contract auditor.

The Rewarder Challenge Solution — Damn Vulnerable DeFi v4

Hey everyone! JohnnyTime here with another Damn Vulnerable DeFi challenge walkthrough. The Rewarder challenge is quite unique as it deals…

vETH Token Hack Analysis

Overview:

MorphoBlue Hack Analysis

Overview:

DeltaPrime Hack Analysis

On November 11th, 2024, DeltaPrime (@DeltaPrimeDefi) was targeted in a sophisticated exploit on both the Arbitrum and Avalanche networks…

Vista Finance Hack Analysis

Overview:

Challenge 10: Free rider, Damn vulnerable defi V4 lazy solutions series

Damn Vulnerable DeFi V4 Challenge 10 Solution: Free rider, Walkthrough

The Impact of Smart Scan Services on Logistics and Supply Chain Management

In today’s global marketplace, efficient logistics and supply chain management are essential for businesses to remain competitive and meet…

Аудит смарт-контрактов от Pontem.

В наибольшей безопасности тот, кто начеку, даже когда опасности нет.

Decentralized insurance — deep dive into Nexus Mutual

After having covered a series of articles on the mechanics of various decentralized exchange protocols, I am now focusing on decentralized…