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The Metana Blog
Meet our authors →Guides, tutorials & career tips.
Expert-written guides on Full-Stack Development, Web3, AI, Data, and Cybersecurity — built for aspiring engineers and tech professionals ready to level up.
Ethernaut WalkthroughEthernaut Level 9 Walkthrough: King
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 , you'll be equipped to both exploit and safeguard the…
Vinh TranMay 20, 2024Read
Ethernaut WalkthroughEthernaut Level 8 Walkthrough: Vault
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 presents a unique smart contract puzzle,…
Rupam RoychoudhuryMay 19, 2024Read
BlockchainLow Level Call vs High Level Call in Solidity [Simplified]
TL;DR Solidity contracts interact with other contracts using high-level calls (via interfaces) or low-level calls ( call , delegatecall , staticcall ). High-level calls are safer and easier to use, automatically…
Metana EditorialMay 17, 2024Read
Web3.0Metana Reviews: Grads Share Their Journeys
Metana's Bootcamp is rewriting the rules of blockchain education by focusing on personal growth and providing each and every student with the skills, industry connections, and confidence needed to succeed in the…
Metana EditorialMay 17, 2024Read
Full-StackCommon Git Errors & How to Fix Them
For developers, Git is the ultimate companion. It acts as a version control system, meticulously tracking changes made to your codebase. But even the most seasoned Git users encounter errors from time to time. Fear not,…
Metana EditorialMay 15, 2024Read
Full-StackJavaScript DOM (Document Object Model)
Websites that update and respond to your clicks feel like magic, but there's a logical reason behind it. In this guide, we'll explore the secret weapon of JavaScript – the Document Object Model, or DOM for short. It's…
Metana EditorialMay 13, 2024Read
BlockchainEthereum Gas Station Network (GSN)
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 you that you need a special token to order – a token you need to buy with actual…
Metana EditorialMay 11, 2024Read
Full-StackAsynchronous JavaScript: Callbacks, Promises, and Async/Await
Best way to understand asynchronous JavaScrip t is to imagine you're juggling. You can keep a few balls in the air at once, but eventually, you'll need to catch one before throwing another. That's how traditional…
Metana EditorialMay 9, 2024Read
Ethernaut WalkthroughEthernaut Level 7 Walkthrough: Force
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 OpenZeppelin. For those unfamiliar with these challenges, each…
Jarrod PyneMay 8, 2024Read
Full-StackJavaScript Error Handling and Debugging Techniques
JavaScript, the popular language of the web, breathes life into interactive websites and dynamic applications. But even the most brilliant code can encounter errors, leaving your masterpiece malfunctioning. Fear not,…
Metana EditorialMay 7, 2024Read
Full-StackEvent Handling in JavaScript: Adding Interactivity to Web Pages
TL;DR: Event handling in JavaScript enables developers to create interactive web pages by responding to user actions like clicks, key presses, and mouse movements. Common methods for adding event listeners include…
Metana EditorialMay 6, 2024Read
BlockchainSolidity and zk-SNARKs: The Dynamic Power Duo
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 blockchains are. But right now, blockchains struggle with two things:…
Metana EditorialMay 5, 2024Read
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