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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.
BlockchainImplementing Oracles in Solidity: Enhance Contract Reliability
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 contracts by themselves operate in a cl
Metana EditorialApril 4, 2024Read
BlockchainNFT Marketplace Development with Solidity: Essential Guide
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 marketplace development using Solid
Metana EditorialApril 3, 2024Read
Ethernaut WalkthroughEthernaut Level 3 Walkthrough: Coin Flip
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 you through the Coin Flip game, showing where the contract has a weak spot
Sven DaneelApril 2, 2024Read
BlockchainWhat is Event Handling in Web3.js? [Explained]
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 environment. They can emit eve
Metana EditorialApril 1, 2024Read
BlockchainHow to Send Ethereum Transactions Using Web3.js
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 is sending transactions, enabling users to t
Metana EditorialMarch 29, 2024Read
BlockchainWhat are Web3.js Providers [Explained]
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 underlying network and perform actions
Metana EditorialMarch 28, 2024Read
BlockchainHow to Connect to Ethereum with Web3.js: Understanding Web3.js Library
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 decentralized network from your web applications. With
Metana EditorialMarch 27, 2024Read
Smart ContractsSolidity Libraries and Inheritance: A Beginner’s Guide
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 serve the purpose of reduc
Metana EditorialMarch 26, 2024Read
Smart ContractsUpgrading Smart Contracts? Here’s All You Need To Know.
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 (dApps).
Metana EditorialMarch 25, 2024Read
Smart ContractsCommon Solidity Security Vulnerabilities & How to Avoid Them
TL;DR: Solidity, the preeminent language for building smart contracts on the Ethereum blockchain and other platforms, empowers developers to create decentralized applications (DApps) that automate complex processes witho
Metana EditorialMarch 25, 2024Read
Smart ContractsBest Practices for Smart Contract Testing & how to
Smart contracts, the self-executing code on blockchains, have revolutionized various industries. From decentralized finance (DeFi) to supply chain management, their potential is undeniable. However, with great power come
Metana EditorialMarch 22, 2024Read
Ethernaut WalkthroughEthernaut Level 2 Walkthrough: Fallout
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 you through the challenge, revealing the misste
Marko JaureguiMarch 21, 2024Read
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