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The Metana Blog
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 21 Walkthrough: Shop
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 changes in Solidity and how these interactions can be exploit
Ana RojoAugust 25, 2024Read
Smart Contracts[Fixed] DeclarationError: Identifier not found or not unique Solidity
In the ever-evolving world of blockchain development, Solidity stands out as the most popular programming language for Ethereum. However, like any other programming language, Solidity comes with its own challenges. When
Metana EditorialAugust 24, 2024Read
BlockchainEthereum Sidechains vs Layer 2 Solutions: Find the Differences
Ethereum has revolutionized the blockchain industry by creating dApps, DeFi, and NFTs. Despite these advancements, scalability issues have led to congestion, high gas fees, and slower transaction times. The community is
Metana EditorialAugust 23, 2024Read
Smart ContractsHow to Write a Foundry Test: Solidity Unit Testing
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 deploying them on the blockchain
Metana EditorialAugust 20, 2024Read
BlockchainScaling Solutions for Ethereum: Overcoming the Bottleneck
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 second (TPS). This limitation affects decen
Metana EditorialAugust 16, 2024Read
SolidityChallenges in Solidity Unit Testing: Limitations and Workarounds
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 use of smart contracts grow, it is crucial to
Metana EditorialAugust 14, 2024Read
JobsHow to Write a Cover Letter: Strategies and Tips
In today’s competitive job market, standing out as a candidate is more critical than ever. The influx of applicants for a single position often results in employers having to sift through hundreds of resumes and cover le
Metana EditorialAugust 13, 2024Read
Full-StackClosure in JavaScript: What is it?
Modern JavaScript offers a wide range of functionalities that enhance the performance and efficiency of code. Among these features, the concept of a closure in JavaScript stands out as a powerful tool that enables better
Metana EditorialAugust 9, 2024Read
Full-Stack12 Top Full Stack Project Ideas in 2025
TL;DR Full stack development involves working on both frontend and backend to build complete web applications. Mastering it allows for efficient problem-solving and collaboration. Here are 12 project ideas to improve you
Metana EditorialAugust 5, 2024Read
JobsWhy Should You Become a Web3 Engineer?
So, you wanna be a Web3 engineer, huh? That’s a bold move, kiddo. You’re basically signing up to be a digital alchemist, crafting the foundation for the next internet. Web3 is all about shaking things up. We’re talking a
Metana EditorialAugust 2, 2024Read
Full-StackMaster ACME Challenges: Secure Your Site with SSL/TLS Certs
In today’s digital world, providing secure communication online is very important. The risk of exposing sensitive information is a significant concern for both individuals and businesses. SSL/TLS certificates, the backbo
Metana EditorialAugust 1, 2024Read
Ethernaut WalkthroughEthernaut Level 20 Walkthrough: Denial
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, and explain how the Hack contract eff
Georgi PlamenovJuly 31, 2024Read
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