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Tag: smart contracts

Top 9 Smart Contract Programming Languages in 2025

TlDR;

Solidity – Ethereum/EVM chains, most popular, beginner-friendly
Vyper – Ethereum/EVM, Python-like, security-focused
Rust – Solana/Polkadot/Near, high-performance, advanced
Cairo – StarkNet L2, zero-knowledge proofs, cutting-edge
Move – Aptos/Sui, resource-oriented, asset safety
Clarity – Stacks/Bitcoin L2, decidable, Bitcoin integration
Motoko – Internet Computer, actor model, persistent storage
Cadence – Flow blockchain, NFT-focused, resource-oriented
Ink! – Polkadot parachains, Rust-based DSL, cross-chain ready

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Metana Editorial August 28, 2025
DeFi-smart contracts
Smart Contracts

Understanding DeFi Smart Contracts: Beginners Guide

A DeFi smart contract is like an autonomous financial agent built on the blockchain (most commonly Ethereum). It’s written in code (think Solidity) and designed to automatically execute actions when certain conditions are met. No banks, no middlemen. Just trustless code doing exactly what it’s programmed to do.

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Metana Editorial June 30, 2025
Smart Contracts

Interoperability in Smart Contracts

Smart contracts have transformed the execution of digital transactions and agreements by offering a secure, automated, and tamper-proof solution for managing complex workflows. However, their

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Metana Editorial January 24, 2025
Blockchain

What is BscScan and How Does it Work?

With the rapid evolution of decentralized finance, non-fungible tokens, and smart contracts, the need for transparency in blockchain networks has become more important than ever.

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Metana Editorial October 12, 2024
Web3.0

What are EVM Compatible Blockchains?

Blockchain technology has evolved rapidly, introducing new platforms and features aimed at expanding decentralization and enhancing scalability, security, and performance. The Ethereum Virtual Machine (EVM)

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Metana Editorial October 4, 2024
Blockchain

What is Bytes32 in Solidity?

TL;DR Bytes32 is a fixed-size (32-byte) data type in Solidity, optimized for the EVM. Used for hashes, Ethereum addresses, and fixed-size strings to save gas.

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Metana Editorial September 25, 2024
Full-Stack

How Similar Are JavaScript and Solidity?

JavaScript and Solidity are both high-level programming languages widely used in their respective domains. While JavaScript dominates the web development world, Solidity is the most

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Metana Editorial September 21, 2024
Solidity

What is the Solidity Compiler?

The Solidity compiler is the essential tool that converts high-level Solidity code into a format that the Ethereum Virtual Machine (EVM) can understand. Whether you’re

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Marko Jauregui September 17, 2024
Solidity

What is Solidity: A Simplified Guide

Solidity is a high-level, object-oriented programming language designed for implementing smart contracts, which have become one of the most transformative innovations of our time. These

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Metana Editorial September 5, 2024
Solidity

Is Solidity Worth Learning In 2024?

In the ever-evolving world of blockchain technology, Solidity has established itself as the go-to programming language for creating smart contracts on the Ethereum platform. As

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Metana Editorial August 26, 2024
Ethernaut Walkthrough

Ethernaut 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,

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Georgi Plamenov July 31, 2024
Smart Contracts

Address 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

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Metana Editorial July 4, 2024
Smart Contracts

Mixed 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

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Metana Editorial June 29, 2024
Smart Contracts

Oracle 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

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Metana Editorial June 28, 2024
Smart Contracts

Flash 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

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Metana Editorial June 27, 2024
Smart Contracts

Governance 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

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Metana Editorial June 26, 2024
Smart Contracts

Reentrancy Attack in Smart Contracts

In a traditional transaction, one party sends funds to another in exchange for goods or services. This exchange typically follows a well-defined sequence of steps.

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Metana Editorial June 21, 2024
Ethernaut Walkthrough

Ethernaut Level 12 Walkthrough: Privacy

Ethernaut Level 12 titled “Privacy” challenges the concept of “private” data on the blockchain. In this level, you’ll encounter a locked contract, and your objective

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Alexis Amoi June 12, 2024
Ethernaut Walkthrough

Ethernaut Level 11 Walkthrough: Elevator

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

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Janos Barna June 10, 2024
Ethernaut Walkthrough

Ethernaut 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,

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Vinh Tran May 20, 2024
Ethernaut-Level-8-Walkthrough-Vault
Ethernaut Walkthrough

Ethernaut 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

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Rupam Roychoudhury May 19, 2024
Web3.0

How Does a DAO Work?

Have you stumbled upon the acronym DAO and scratched your head in confusion? You’re not alone. Decentralized Autonomous Organizations are the new hot topic in

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Metana Editorial March 12, 2024
Smart Contracts

10 Best Practices for Smart Contract Coding

Solidity, the language powering Ethereum smart contracts, offers immense potential for building decentralized applications (dApps). However, the unique blockchain environment demands a different approach to

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Metana Editorial February 1, 2024
How-to-Write-Solidity-Smart-Contracts
Blockchain

How to Write Solidity Smart Contracts

Smart contracts are like digital wizards—self-executing agreements with predefined rules, all meticulously encoded. They’re the enchanting core of blockchain technology, promising a world of transparency

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Ali Kanso October 19, 2023
Blockchain

What are Events in Solidity?

TL;DR: What are Solidity Events? Solidity events are a way for smart contracts to communicate with each other and with external applications. They allow developers

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Metana Editorial July 12, 2023

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