viem

Skill based on viem, generated 2026-02-09. Docs: https://viem.sh

viem is a TypeScript client for Ethereum: Public/Wallet/Test clients, transports (HTTP, WebSocket, custom), type-safe contract reads/writes, local and JSON-RPC accounts, chains, ENS, and encoding/unit helpers.

Core References

Topic	Description	Reference
Clients & Transports	Public/Wallet/Test clients, HTTP/WS/custom transports, multicall batching	core-clients-transports
Contract	getContract, readContract, writeContract, simulateContract	core-contract
Accounts	Local (privateKey, mnemonic) and JSON-RPC accounts, extend with publicActions	core-accounts

Features

Chains & ENS

Topic	Description	Reference
Chains	Built-in chains (viem/chains), defineChain for custom	features-chains
ENS	getEnsAddress, getEnsName, getEnsAvatar, normalize	features-ens

Utilities

Topic	Description	Reference
Utilities	getAddress, parseEther/formatEther, encoding, keccak256, ABI helpers	features-utilities
ABI	parseAbi, encodeAbiParameters, decodeAbiParameters, getAbiItem	features-abi

Auth

Topic	Description	Reference
SIWE	createSiweMessage, verifySiweMessage, parseSiweMessage, validateSiweMessage	features-siwe

Public data

Topic	Description	Reference
Public Actions	getBalance, getLogs, getBlock, estimateGas, waitForTransactionReceipt, watchEvent	features-public-actions

Best Practices

Topic	Description	Reference
Contract & Errors	Simulate before write, typed error handling, RPC/security	best-practices-contract-and-errors

External Links

• viem.sh
• wevm/viem GitHub