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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.
Smart ContractsSmart contract security: what every Solidity developer needs to know in 2026
Over $3.8B has been stolen from smart contract exploits between 2020 and 2025. Yet most developers treat security as someone else’s problem. This guide breaks down the 5 vulnerabilities that cause the most damage, the fr
Metana EditorialApril 10, 2026Read
Smart ContractsERC Token Standards: Your Simplified Guide
Discover the complete guide to ERC token standards for 2026. Learn how ERC-20, ERC-721, ERC-1155, and newer standards like ERC-4337 power the Ethereum ecosystem. From fungible tokens to NFTs and account abstraction, this
Metana EditorialFebruary 13, 2026Read
Smart ContractsTop 9 Smart Contract Programming Languages in 2026
mart contracts are at the heart of blockchain development, and choosing the right programming language can make all the difference. This article breaks down nine popular smart contract languages, their strengths, and rea
Metana EditorialJanuary 6, 2026Read
Smart Contracts10 Best Practices for Smart Contract Coding
Solidity powers Ethereum smart contracts, but writing effective code requires more than knowing the syntax. From managing gas costs and avoiding security vulnerabilities to applying proven design patterns and testing rig
Metana EditorialJanuary 2, 2026Read
BlockchainWhat are Events in Solidity?
Choosing the right programming language depends on what you want to build and the career path you want to follow. This guide explains the strengths of popular options like Python, JavaScript, Java, Go, Rust and Swift, an
Metana EditorialNovember 20, 2025Read
Smart ContractsUnderstanding Solidity Control Structures: A Comprehensive Exploration
Explore the core control structures in Solidity from if else statements to loops and logical flows that shape how smart contracts behave. Learn how these tools help your code make decisions, repeat tasks, and react to re
Metana EditorialNovember 19, 2025Read
BlockchainWeb3 Solidity Projects for Beginners : Building a Strong Foundation
Solidity is the main programming language for creating smart contracts on the Ethereum blockchain. This article covers Solidity projects for beginners like the “Hello, World!” contract, token sale contracts, voting syste
Metana EditorialNovember 7, 2025Read
BlockchainHow to Make NFT Art for Free: Step-by-Step
Create a free NFT on OpenSea or Rarible using lazy minting with no gas fees upfront. Set up MetaMask, connect your wallet, upload PNG, GIF, or WEBP art, and list instantly. The buyer pays minting costs upon purchase. Per
Metana EditorialOctober 30, 2025Read
BlockchainHow To Add Polygon Network to Metamask Wallet (MATIC)
Adding Polygon network to your MetaMask wallet is quick and easy. Simply click “Add Network,” enter the official RPC URL, Chain ID 137, and symbol MATIC. Once configured, you’ll unlock access to low cost transactions, De
Metana EditorialOctober 13, 2025Read
BlockchainStep by Step: How To Start Learning Web3
TL;DR Step Description 1 Follow top Web3 builders on Twitter to stay updated 2 Learn via video tutorials on YouTube 3 Build simple projects like ERC‑20 tokens or smart contracts 4 Join a bootcamp if you want structured g
Metana EditorialAugust 1, 2025Read
Smart ContractsHow Do Signatures and Malleability Impact Web3 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 significant threat. This allows attacke
Metana EditorialJuly 21, 2025Read
Crypto FaucetsHow to Deploy a Smart Contract to the Sepolia Testnet (4-minutes read)
Testing a smart contract without risking real ETH is a game-changer. The Sepolia testnet lets you do just that. This guide, shows you how to deploy a smart contract using MetaMask and a browser-based Solidity IDE, with f
Metana EditorialJuly 18, 2025Read
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