Posted by Solidity Team on December 4, 2025

Solidity is a programming language for writing smart contracts on the Ethereum blockchain, offering tools and resources for building decentralized applications (DApps) and blockchain solutions. Developers can learn about smart contract development, Ethereum development tools, and decentralized finance (DeFi) to create secure and reliable blockchain applications using Solidity.

Solidity

The 2025 Solidity Summit in Buenos Aires brought together 350 participants to discuss the language's evolution. Key announcements included the ongoing compiler backend overhaul delivering immediate performance improvements like faster compilation and stack-too-deep error resolution. The team clarified that Classic and Core Solidity represent a unified roadmap rather than separate languages, with Core introducing features like generics, algebraic data types, and first-class functions while maintaining interoperability with Classic through cross-language imports. Sessions covered compiler modernization, the new Yul → SSA-CFG → EVM architecture, tooling advances, security workflows, and ecosystem developments including Hardhat 3 and alternative implementations like Solar and solx.

Solidity Summit 2025 Recap

Classic & Core Solidity: One Interconnected Roadmap

Advanced Solidity Concepts & Compiler Research