Solidity is a statically typed, contract-oriented programming language used to write smart contracts for the Ethereum Virtual Machine (EVM). A Solidity source file is compiled into bytecode that an EVM-compatible network can execute. Ethereum is its best-known home, but EVM-compatible networks also support Solidity contracts.
What Solidity Is Used For
Developers use Solidity to define on-chain state, rules, and functions for applications such as tokens, exchanges, lending protocols, games, and governance systems. A smart contract is code deployed to a blockchain; Solidity is one language for authoring that code. Events can make contract activity easier for applications to observe, while libraries and inheritance help organize larger projects.
How Solidity Works
Solidity is statically typed: variable types are checked during compilation. It includes contract-specific features such as state variables, functions, modifiers, events, errors, structs, and interfaces. The compiler translates source code into EVM bytecode and can also produce an application binary interface (ABI), which software uses to call contract functions and interpret responses.
Compiler versions and settings matter. A version pragma states which compiler versions a source file accepts; it does not install that compiler or prove that the code is safe. The bytecode that is actually deployed, the selected compiler, and the target network all affect how a contract behaves.
Security and Limitations
Solidity does not make a contract secure by itself. Developers need to consider authorization, external calls and reentrancy, arithmetic and rounding, transaction ordering, upgrade controls, and assumptions about other contracts or oracles. Solidity 0.8 and later generally check arithmetic overflow and underflow unless code uses an unchecked block, but that does not prevent every economic or logic error.
Testing, static analysis, formal methods, independent review, and a well-scoped smart contract audit can find different classes of problems; none guarantees that a deployed system is risk-free. Source code may be public, but a verified source listing is not the same as a security certification.
Tools and Other Languages
Remix provides a browser-based environment for compiling and trying small contracts. Foundry and Hardhat are commonly used for local development, automated tests, and deployment workflows. Other languages and toolchains target the EVM too, and languages such as Rust or Move are used in different virtual-machine ecosystems. The best choice depends on the target chain, developer experience, tooling, and security needs.
Social Media Sentiment
Developer discussions often present Solidity as a practical route into EVM development while emphasizing that security and testing take substantial effort. In one r/ethdev discussion about learning Solidity and smart-contract security, replies include both encouragement to build and concerns about the job market and the difficulty of security work. This is a small community conversation, not a measure of developer opinion overall.
Last updated: 2026-10
Related Terms
See Also
- Why Smart Contract Audits Fail: What Post-Mortems Reveal About the Limits of Security Reviews
- Does Ethereum TPS Include Layer 2 Transactions?
- What Is MEV — And Why Every Ethereum Transaction Is a Game
- Exchange crypto with ChangeNOW
Sources
- Solidity Documentation — official language documentation describes Solidity contracts, types, compilation, and the EVM target.
- Solidity Security Considerations — the Solidity project documents common pitfalls, including reentrancy, private data, and compiler or platform risks.
- Ethereum Virtual Machine — Ethereum.org explains the execution environment that runs smart-contract bytecode.