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Viem

Listed
0xsardius·vlatest·frontend·MIT

Viem generates React code from your Rust/Svelte/Zig code, streamlining cross-platform development and boosting developer productivity.

Repository

Install on your platform

Showing Claude Code. One command installs this skill into any of the agents below.

  1. 1

    Run this in your project

    terminal
    $ npx skills add 0xsardius/onchain-typescript-skills --skill viem -a claude-code

  2. Uses the open-source skills CLI and needs Node.js. Add -g to install it for your user instead of this project.

What we know about this skill

Publisher

0xsardius

Taken from the source listing. We haven't verified who controls this account.

Install target

Live repository

Not pinned. Installing fetches whatever the repository holds at the time you run the command.

No human has reviewed this code. The checks below are a static scan of the files at one commit — nobody has run this skill or judged whether it works. A skill runs with whatever access you give your agent, so read the source before you install it.

Automated safety checks

scanned

This skill failed 1 of 6 checks. A failure is not proof of bad intent; it means something in the code needs a human to look at it before you run it.

  • No undeclared network calls: failed

    Contacts 4 hosts that are neither well-known infrastructure nor declared in the skill's frontmatter: eth-mainnet.g.alchemy.com, mainnet.infura.io, rpc.ankr.com, rpc.mychain.com.

    Every host the skill dials — from its scripts, its config endpoints or the commands it tells the agent to run — is either well-known package and API infrastructure or declared in its own frontmatter. Links in documentation are not counted.

    Hosts contacted

    eth-mainnet.g.alchemy.comundeclaredrpc.mychain.comundeclaredmainnet.infura.ioundeclaredrpc.ankr.comundeclared

    What it found (3 of 6)

    • skills/viem/SKILL.md:30contacts eth-mainnet.g.alchemy.com
      transport: http('https://eth-mainnet.g.alchemy.com/v2/YOUR_KEY'),
    • skills/viem/SKILL.md:40contacts eth-mainnet.g.alchemy.com
      transport: http('https://eth-mainnet.g.alchemy.com/v2/YOUR_KEY'),
    • skills/viem/references/common-errors.md:154contacts eth-mainnet.g.alchemy.com
      http('https://eth-mainnet.g.alchemy.com/v2/KEY1'),

  • Declares what it does: passed

    SKILL.md parses and declares a name and a description.

    SKILL.md exists, its frontmatter parses, and it declares a name and a description.

  • No obfuscated payloads: passed

    No encoded or obfuscated payloads.

    No base64, hex or compressed blob is decoded and then executed, and no encoded shell commands.

  • No credential access: passed

    Reads no keys, tokens, keychains or credential files.

    Neither the code nor the SKILL.md instructions read SSH keys, cloud credentials, keychains, token stores, browser cookie databases or dotfiles that hold secrets.

  • No pipe-to-shell installers: passed

    No pipe-to-shell or download-and-run installers.

    No `curl … | sh` pattern, in the code or in the instructions, that runs code fetched at run time.

  • Pinned to a commit: passed

    Scanned 0xsardius/onchain-typescript-skills at 098575e6c3.

    The exact upstream commit SHA that was scanned is recorded, so the result refers to specific bytes.

Commit
098575e6c3
Manifest
skills/viem/SKILL.md
Scanned
3 files, 526 lines
This is a static scan, not a review. It reads the skill's files; it does not run them, and it cannot tell you whether the skill is any good or whether the code does what its description says. A skill runs with whatever access you give your agent.
What each check looks for →

About this skill

What it does

This skill provides a TypeScript interface for interacting with Ethereum using Viem. It streamlines common development patterns for contract interactions, client setup, and ensures type safety when working with smart contracts. The skill facilitates secure and efficient operations such as reading contract data, writing transactions, watching events, and performing batch reads via multicall.

When to use it

  • Developing decentralized applications (dApps) that interact with Ethereum smart contracts.
  • Building tools for managing or analyzing on-chain data.
  • Implementing secure wallet interactions requiring read and write capabilities.
  • Automating tasks involving Ethereum contract calls, such as simulating transactions before execution.
  • Monitoring blockchain events to react to specific contract actions.

Key capabilities

  • Client Setup: Creates both public (read-only) and wallet (write) clients for interacting with the Ethereum network.
  • ABI Type Safety: Enforces correct usage of as const when defining ABIs to ensure full type inference.
  • Contract Read Pattern: Provides a standardized pattern for reading data from smart contracts.
  • Contract Write Pattern: Includes simulation steps before executing transactions to prevent errors.
  • Event Watching: Enables monitoring of specific contract events and reacting to their occurrences.
  • Multicall: Facilitates batch reads to multiple contracts efficiently.

Example prompts

  • "Create a public client for interacting with the Ethereum mainnet."
  • "Show me how to set up a wallet client using a private key."
  • "Demonstrate reading the balance of a contract using Viem's readContract function."
  • "How do I simulate a transaction before writing it to the blockchain?"

Tips & gotchas

  • ABI as const: Always use as const when defining ABIs to ensure proper type inference and avoid errors.
  • BigInt for Amounts: Use BigInt literals (e.g., 1000000n) when specifying amounts in contract function arguments, as Ethereum uses uint256 data types.
  • Simulate Before Writing: Always simulate transactions using simulateContract before executing them with writeContract to catch potential errors early on.