TL;DR JavaScript is evolving to support Web3 applications through: Overall, understanding JavaScript is essential as it continues to be a fundamental tool in building innovative
TL;DR A Solidity IDE is an essential tool for writing, testing, and deploying smart contracts efficiently. Since smart contracts are immutable after deployment, using a
NFTs (Non-Fungible Tokens) have taken the digital world by storm, changing how we perceive ownership of art, music, gaming assets, and even real estate. But
As blockchain technology continues to mature, the need for scalability, efficiency, and affordability has grown exponentially. Enter Layer 2 smart contracts, a powerful solution designed
The wait is over—ETHGlobal Pragma is back for 2025! This transformative one-day, single-track, in-person summit is where Ethereum’s brightest minds, developers, and industry leaders come
Blockchain has changed many industries with decentralized, transparent and secure data storage and transaction systems. It’s spread from finance and supply chains to healthcare and
In the ever-evolving world of blockchain technology, smart contract upgrades have become an essential feature to ensure adaptability, fix bugs, and enhance functionality. However, upgrading
Remote working has become one of the biggest trends in the modern workplace, changing how, where and when we work. Enabled by technology and accelerated
TL;DR: In the rapidly evolving world of blockchain technology, Ethereum has emerged as one of the most widely adopted platforms, enabling decentralized applications (dApps), smart
Ethereum has become the backbone of the Decentralized Finance (DeFi) revolution, and with the introduction of Uniswap V4, it’s taking decentralized exchanges (DEXs) to the
The Ethereum Virtual Machine (EVM) is a critical component of the Ethereum blockchain, powering smart contracts and decentralized applications (dApps). Understanding how to interact with
In blockchain development, particularly on Ethereum, testing smart contracts is crucial to ensuring that they function as expected and are secure from exploits. Once a
Solidity is the primary programming language for Ethereum smart contracts. While it offers a high-level, developer-friendly syntax, it also provides access to low-level assembly, which
Blockchain technology has evolved rapidly, introducing new platforms and features aimed at expanding decentralization and enhancing scalability, security, and performance. The Ethereum Virtual Machine (EVM)
ETHDenver is an important Ethereum and blockchain community event that takes place every year in Denver, Colorado. This is known as the world’s largest and
TL;DR Bytes32 is a fixed-size (32-byte) data type in Solidity, optimized for the EVM. Used for hashes, Ethereum addresses, and fixed-size strings to save gas.
JavaScript and Solidity are both high-level programming languages widely used in their respective domains. While JavaScript dominates the web development world, Solidity is the most
Blockchain technology is continuously growing to become one of the most transformative forces in the digital world. In the Ethereum blockchain, transactions and computations involve
The Solidity compiler is the essential tool that converts high-level Solidity code into a format that the Ethereum Virtual Machine (EVM) can understand. Whether you’re
As blockchain technology continues to advance, Solidity has become the backbone of smart contract development on the Ethereum network. It has gained popularity as a
Solidity is a popular, high-level programming language that is used to develop smart contracts on the ethereum blockchain. These self-executing contracts hold the potential to
Solidity is a high-level, object-oriented programming language designed for implementing smart contracts, which have become one of the most transformative innovations of our time. These
If you’re looking to dive into blockchain development, one of the first steps is to learn Solidity. Solidity is the most widely used programming language
In the world of blockchain and cryptocurrency, the term Wei holds a significant importance, particularly within the Ethereum ecosystem. While many are familiar with Ether
Understanding Solidity is crucial if you’re eager to dive into blockchain development. However, mastering the language is just the beginning. You must identify the best
As blockchain continues to grow, the development of smart contracts has become an important aspect of creating decentralized applications. With smart contracts becoming more popular
In the ever-evolving world of blockchain technology, Solidity has established itself as the go-to programming language for creating smart contracts on the Ethereum platform. As
In this article, we will walkthrough Ethernaut Level 21: Shop. This challenge is designed to test your understanding of how view functions interact with state
Smart contracts have revolutionized trust, transparency, and automation in decentralized systems. To maintain this trust as blockchain evolves, it’s crucial to test smart contracts before
TL;DR: Ethereum, one of the most popular blockchain platforms, has faced a significant scalability challenge. The network’s current throughput is limited to 15 transactions per
As the backbone of Ethereum smart contracts, Solidity has gained significant traction as the languages for building decentralized applications (dApps). As the demand for the
Ethernaut Level 20: Denial focuses on a vulnerability related to denial-of-service (DoS) attacks. In this article, we’ll break down the Denial contract, identify its vulnerabilities,
In this walkthrough, we will guide you through the Ethernaut Level 19: Alien Codex challenge. This challenge is designed to test your skills in array
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.
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 innovation, but unlike traditional software, upgrades to deployed smart contracts can be a tricky affair. The very nature of blockchain immutability presents
Web3 thrives on the power of smart contracts – self-executing programs that automate tasks on the blockchain. However, a seemingly minor oversight – unchecked return
This article will break down the Ethernaut Level 16: Preservation contract, point out its flaws, and show how the Hack contract takes advantage of these
The lifeblood of Web3 applications often lies in tokens, and ERC token standards provide a common language for creating and interacting with these digital assets
Solidity, the preeminent language for writing smart contracts on the Ethereum blockchain, is a powerful tool. But like any powerful tool, it has its quirks
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
Ethernaut Level 15, “Naught Coin,” throws you headfirst into the world of ERC20 tokens and their potential vulnerabilities. This challenge presents a seemingly locked contract
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,
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.
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.
Have you ever sent a cryptocurrency payment and felt like it’s taking forever to confirm? You’re not alone. Unlike swiping your debit card, crypto transactions
Imagine a world where anything digital can be securely owned and traded. Artwork, in-game items, concert tickets, even your loyalty points – all represented by
Welcome to the fascinating world of smart contracts, where lines of code dictate financial agreements and automate complex processes. But what about time? How do
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
Decentralized Applications, commonly known as dApps, have revolutionized the way we interact with digital services, providing enhanced security, transparency, and user control. As the backbone
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
Delegatecall is a powerful but intricate feature in Solidity that allows contracts to delegate execution to other contracts. Understanding delegatecalls is crucial for building advanced
In this challenge, we’ll dive into smart contracts’ payment vulnerability and essential security practices to prevent such issues. By the end of ethernaut level 9,
Ethernaut challenges, akin to a hacking Capture The Flag (CTF) for Web3 enthusiasts, provide an immersive platform to explore Ethereum and Solidity programming. Each challenge
TL;DR Solidity contracts interact with other contracts using high-level calls (via interfaces) or low-level calls (call, delegatecall, staticcall). Key Differences: Best Practices: In Solidity, contracts
Imagine you walk into a fancy restaurant, eager to try their new menu. But before you can even glance at the dishes, the waiter informs
Being relatively new to the Web3 space and having a keen interest in Security has naturally led to me participating the Ethernaut Challenge hosted by
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
Hello Everyone! My name is Shiran Sukumar, I am a student at Metana. I wanted to share with you all a walkthrough on how to
This Web3/Solidity-based wargame is akin to a hacking Capture The Flag (CTF) challenge, where each level presents a smart contract puzzle waiting to be ‘hacked’.
Blockchains, the revolutionary technology underpinning cryptocurrencies and decentralized applications (dApps), have a fundamental challenge: SCALABILITY. As these networks gain traction and user adoption increases, their
TL;DR A Decentralized Exchange (DEX) allows peer-to-peer trading without intermediaries. To build a basic DEX using Solidity, key components include: Steps to build: Enhancements include
TL;DR: The world of blockchain technology has seen a increase in the development and use of tokens. These digital assets represent ownership, utility, or access
Solidity, the programming language for Ethereum smart contracts, excels at automating tasks and enforcing complex logic within the secure confines of the blockchain. However, smart
TL;DR: Solidity, the programming language specifically designed for Ethereum Virtual Machine (EVM), plays a pivotal role in building robust NFT marketplaces. This article explains, NFT
The Ethernaut Level 3, called “Coin Flip,” is a lesson on the weak spots in how smart contracts handle chance and prediction. This article walks
The world of blockchain technology develops on real-time communication and transparency. Smart contracts, the self-executing programs on blockchains, play a significant role in this dynamic
TL;DR: Web3.js is a powerful library that unlocks the potential of interacting with the Ethereum blockchain and other Web3-compliant platforms. One of its core functionalities
Web3.js, a popular JavaScript library, empowers developers to build decentralized applications (dApps) that interact with blockchains. But how do these dApps actually connect to the
Web3.js open up the huge power of Ethereum blockchain for developers. This JavaScript library let’s you talk with Ethereum, allowing you to interact with Ethereum’s
Solidity, the programming language powering Ethereum smart contracts, offers robust tools for code reusability. Two key approaches dominate this landscape: inheritance and libraries. While both
Smart contracts, the self-executing code on blockchains, have revolutionized various industries. They offer trust, transparency, and automation in transactions, forming the backbone of Decentralized Applications
The Ethernaut Level 2 offers a fascinating glimpse into the vulnerabilities that can arise from seemingly minor oversights in smart contract development. This article takes
TL;DR Etherscan is the leading Ethereum block explorer, but alternatives offer unique features and specialized functionalities. Top options include BscScan (for Binance Smart Chain), Polygonscan
This Web3/Solidity-based wargame is akin to a hacking Capture The Flag (CTF) challenge, where each level presents a smart contract puzzle waiting to be ‘hacked’.
EVM (Ethereum Virtual Machine) storage refers to the permanent storage space within the Ethereum blockchain where smart contract data is stored. Each smart contract deployed
Imagine a world where you have complete control over your finances, without relying on traditional banks or middlemen. This is the promise of Decentralized Finance
Solidity, the language powering Ethereum smart contracts, offers immense potential for building decentralized applications (dApps). However, the unique blockchain environment demands a different approach to
TL;DR Debugging Solidity smart contracts is crucial due to their immutable nature. Hardhat offers a console.log function, similar to JavaScript’s, allowing developers to print variables
TL;DR Have you ever faced a sudden stop sign while navigating the Ethereum universe? Meet the execution reverted errors, the EVM’s way of keeping things
TL;DR Blockchain technology has revolutionized the digital world, and at the forefront of this revolution are two key programming languages: Solidity and Rust. The ongoing
Struggling to grasp why your Ethereum transactions sometimes cost more than the transaction itself? You’re not alone in this crypto puzzle. Let’s simplify it. Ethereum
TL;DR Web3 is revolutionizing the internet by enabling decentralized, peer-to-peer interactions without intermediaries, powered by blockchain and cryptography. Open-source projects are at the heart of
You probably already know about Solidity, right? It’s a programming language that helps us create smart contracts on the Ethereum network. It’s quite similar to
TL;DR Solidity is a high-level programming language specifically designed for developing smart contracts on the Ethereum blockchain. In Solidity, functions are a fundamental building block,
Blockchain development is the process of creating and maintaining blockchain-based applications and systems. Blockchain is a distributed ledger technology (DLT) that allows for secure, transparent,
Smart contracts are like digital wizards—self-executing agreements with predefined rules, all meticulously encoded. They’re the enchanting core of blockchain technology, promising a world of transparency
TL;DR: Flash loans are a super cool new idea in the world of decentralized finance (DeFi). They let users borrow as much money as they
TL;DR Solidity is the main programming language for creating smart contracts on the Ethereum blockchain. This article covers beginner-friendly Solidity projects like the “Hello, World!”
Blockchain technology is revolutionizing the way we think about data and trust. But what exactly is Layer 1 in blockchain, and why is it so
TL;DR Testnet Ethereum is a blockchain used for testing smart contracts and dApps without risking real money.Popular testnets include: Test ETH can be obtained from
What is Smart Contract ABI? A smart contract ABI, or Application Binary Interface, is a standard way to interact with smart contracts in the Ethereum
TL;DR: Ethereum development is a high-demand skill in blockchain and programming. To become a proficient Ethereum developer, follow a sequential learning path: By following this
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