Viem

Viem is a TypeScript interface designed to provide developers with a reliable, efficient, and modular way to interact with the Ethereum blockchain. It offers lightweight, composable modules that enable building Ethereum applications and libraries with a focus on type safety and developer experience. Viem addresses common issues found in existing Ethereum libraries such as ethers.js and web3.js by emphasizing stability, minimal bundle size, and performance. Its APIs are designed to be explicit and flexible, allowing developers to understand Ethereum concepts deeply while maintaining strong typing and autocomplete support.

The tool supports abstractions over the JSON-RPC API, first-class smart contract interaction APIs, and utilities for ABI encoding and decoding. It integrates seamlessly with popular Ethereum development environments like Anvil, Hardhat, and Ganache, and supports importing wallets via browser extensions, WalletConnect, or private keys. Viem’s modular architecture enables tree-shaking to keep final bundle sizes small, which is critical for web applications targeting users on slow networks.

Viem stands out by combining a test-driven development approach with comprehensive documentation and stable, deterministic APIs. It is built by the same team behind wagmi, a popular React hooks library for Ethereum, ensuring tight integration and a smooth developer experience. Developers can get started quickly by installing the package via npm and creating clients configured for specific Ethereum chains and transports. Extensive guides and examples are available to ease onboarding and migration from other libraries.