Blockchain & Cryptocurrency Glossary

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Solidity

Pronunciation
[sə-lĭ-dĭ-tē]
Analogy
Think of Solidity as the JavaScript of Ethereum smart contracts—it provides high‑level syntax to define and manage on‑chain logic.
Definition
A statically‑typed, contract‑oriented programming language designed for writing smart contracts on Ethereum and EVM‑compatible blockchains.
Key Points Intro
Solidity offers developers key features for on‑chain programming:
Key Points

Contract classes: Define state and behavior in reusable templates.

Static typing: Types are known at compile time, enabling safety checks.

Inheritance & interfaces: Supports modular, object‑oriented design.

ABI generation: Automatically produces the Application Binary Interface.

Example
A developer writes a Solidity contract for an ERC‑20 token with balance tracking, minting, and transfer functions, then deploys it to Ethereum mainnet.
Technical Deep Dive
Solidity compiles to EVM bytecode via the solc compiler. It supports value types (uint, address), reference types (arrays, structs), and function modifiers. The compiler performs control‑flow analysis, type checking, and emits an ABI JSON. Memory and storage are distinct: storage persists on‑chain, memory is ephemeral during execution.
Security Warning
Unchecked arithmetic and reentrancy vulnerabilities can lead to fund loss; follow best practices and use SafeMath libraries.
Caveat
Language features evolve rapidly; older code may not compile under newer compiler versions.
Related Terms
EVM
ABI
Smart Contract Audit
Gas Optimization
Vyper
Bytecode

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