Viem

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.