TL;DR: Understanding Consensus Mechanisms Blockchain technology, the foundation of cryptocurrencies like Bitcoin and Ethereum, relies heavily on consensus mechanisms to validate transactions and secure the
TL;DR Decentralized Finance (DeFi) relies on smart contracts to enable secure, trustless financial transactions. However, vulnerabilities in smart contracts can lead to devastating hacks, financial
Security, trust, and decentralization are at the heart of the blockchain technology that powers many of the digital currencies. At the core of this system
Blockchain technology is transforming industries across various sectors, including finance, supply chain management, healthcare, and a lot more. At the heart of blockchain development are
As you may already know, The Ethernaut, from OpenZeppelin, is a series of challenges designed to teach and test your understanding of smart contract security.
Web3 security relies heavily on digital signatures to verify the authenticity and authorization of transactions. However, a vulnerability known as signature malleability can pose a
Web3 development thrives on smart contracts – self-executing programs on the blockchain. These contracts are written in high-level languages like Solidity and then compiled into
Web3 promises a democratized financial landscape, but a shadow lurks within its decentralized exchanges (DEXes) – Frontrunning. This exploitative practice leverages knowledge of upcoming transactions
Decentralization is the cornerstone of Web3, aiming to empower users and reduce reliance on centralized control. However, a common pitfall in Web3 development contradicts this
Exception handling is a crucial aspect of any programming language, and Web3 development with Solidity is no exception. The try-catch block offers a mechanism to
Web3 thrives on the power of smart contracts – self-executing programs that automate tasks on the blockchain. However, a seemingly minor oversight – unchecked return
Decentralized Finance (DeFi) has revolutionized financial services, offering lending and staking opportunities without the need for intermediaries. However, these protocols are not without their weaknesses.
Web3 thrives on user empowerment and the ease of sending and receiving cryptocurrency. However, a growing threat lurks in the shadows: Address Poisoning. This malicious
Web3 applications represent the cutting edge of decentralization, but they do not operate in isolation. These applications require real-world data to function effectively, and this
In the realm of Web3, the concept of decentralization is not just a buzzword—it’s a fundamental principle. Decentralized Autonomous Organizations (DAOs) epitomize this ethos, where
In the world of blockchain and smart contracts, security is paramount. However, there’s a fine line between ensuring security and creating rigid, inflexible systems. One
In the dynamic and evolving landscape of Web3, randomness plays a crucial role in ensuring the fairness and unpredictability of various applications. From provably fair
TL;DR In the world of smart contracts, where code governs the execution of transactions and other functions, the importance of proper input validation cannot be
In a traditional transaction, one party sends funds to another in exchange for goods or services. This exchange typically follows a well-defined sequence of steps.
Access control is a crucial aspect of smart contract security, governing who is authorized to perform specific actions within the contract. Just as a bouncer
TL;DR: Challenge 13: Gatekeeper One, also known as Ethernaut Level 13, stands out because it necessitates a thorough understanding of Ethereum transactions and gas mechanics.
Ethernaut Level 12 titled “Privacy” challenges the concept of “private” data on the blockchain. In this level, you’ll encounter a locked contract, and your objective
Ethernaut challenges, comparable to a Web3-themed hacking Capture The Flag (CTF) competition, offer a dynamic environment for diving into Ethereum and Solidity programming. Each level
Understanding re-entrancy is crucial for anyone developing or auditing Ethereum smart contracts. Failure to properly handle re-entrant calls can result in the loss of funds
Blockchain tech is a hive of activity, buzzing with ideas to make it safer and more private for everyone. Two prominent players in this arena
Imagine a super secure way to store information and run programs on the internet, like a giant digital record keeper everyone can trust. That’s what
In this level, we will familiarize ourselves with delegatecall and fallback. This serves as a preliminary step towards understanding more advanced concepts, like the proxy
TL;DR Imagine the early days of the Wild West. Untamed potential, a rush of opportunity, but also the risk of chaos without the proper tools.
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