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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.
Smart ContractsAddress Poisoning in Smart Contracts
Web3 thrives on user empowerment and the ease of sending and receiving cryptocurrency. However, a growing threat lurks in the shadows: Address Poisoning . This malicious tactic exploits human error and vulnerabilities…
Metana EditorialJuly 4, 2024Read
Smart ContractsStorage and Deletion in Web3: Revolutionizing Data Management
Web3 thrives on the immutability of the blockchain – a guarantee that once data is written, it cannot be altered or erased. This permanence is a core strength, fostering trust and transparency. However, for developers,…
Metana EditorialJuly 2, 2024Read
Smart ContractsSolidity Language Quirks: Avoiding Pitfalls in Smart Contract Development
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 and hidden complexities. These can lead to subtle errors and…
Metana EditorialJuly 2, 2024Read
Smart ContractsMixed Accounting in Smart Contracts
Web3 is ushering in a new era of financial applications, blending traditional finance (TradFi) with decentralized finance (DeFi). Many projects straddle this line, requiring a unique accounting approach known as Mixed…
Metana EditorialJune 29, 2024Read
Smart ContractsOracle Dependence in Smart Contracts
Web3 applications represent the cutting edge of decentralization, but they do not operate in isolation. These applications require real-world data to function effectively, and this is where oracles come into play.…
Metana EditorialJune 28, 2024Read
Smart ContractsFlash Loan Attacks in Smart Contracts
Flash loans, a cornerstone of DeFi (Decentralized Finance), offer exciting liquidity possibilities. But in the wrong hands, they can become a developer's nightmare – fueling flash loan attacks. These attacks exploit…
Metana EditorialJune 27, 2024Read
Smart ContractsGovernance Attacks in Smart Contracts
In the realm of Web3, the concept of decentralization is not just a buzzword—it's a fundamental principle. Decentralized Autonomous Organizations (DAOs) epitomize this ethos, where token holders collectively make…
Metana EditorialJune 26, 2024Read
Smart ContractsExcessive Function Restriction in Smart Contracts
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 common pitfall in smart contract design is…
Metana EditorialJune 25, 2024Read
Smart ContractsInsecure Randomness in Smart Contracts
In the dynamic and evolving landscape of Web3, randomness plays a crucial role in ensuring the fairness and unpredictability of various applications. From provably fair gaming to the generation of unique tokens, the…
Metana EditorialJune 25, 2024Read
Ethernaut WalkthroughEthernaut Level 15 Walkthrough: Naught Coin
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 with a 10-year transfer lock on your own…
Alexis AmoiJune 24, 2024Read
Smart ContractsImproper Input Validation in Smart Contracts
T L;DR Improper input validation in smart contracts can lead to severe security vulnerabilities and exploits. Common risks include unauthorized access, infinite loops, and drained contract balances. Best practices:…
Metana EditorialJune 23, 2024Read
Ethernaut WalkthroughEthernaut Level 14 Walkthrough: Gatekeeper Two
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, including Ethernaut Level 14 ,…
Janos BarnaJune 22, 2024Read
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