Building a DeFi Dashboard with Next.js and Wagmi

The hardest part isn't the charts

Most developers assume the hard part of a DeFi dashboard is the data visualization. It's not. Libraries like Recharts handle that well. The real challenge is managing state between what's on-chain, what's cached, and what the user's wallet is telling you — all at once.

Start with your Wagmi config, not your components

Before writing a single component, set up your Wagmi config completely. Define your supported chains, your transport (Alchemy or Infura), and your connectors. This one file drives everything else in your app.

Handle all wallet states upfront

Your UI will have three wallet states: disconnected, connecting, and connected. Build each state as a separate component — handle it at the layout level. This prevents the flicker and partial renders that make Web3 apps feel broken.

Fetch on-chain data with React Query, not useEffect

Wagmi integrates natively with React Query, giving you caching, refetch intervals, loading states, and error handling for free. Your dashboard should never show stale data or make the same RPC call five times.

Polling vs websockets

For most DeFi dashboards, polling every 15–30 seconds is fine and far easier to maintain than websocket connections. Save websockets for live trading interfaces where sub-second updates actually matter.

Performance matters more in Web3

DeFi users are sophisticated and impatient. If your dashboard takes 3 seconds to load positions, they'll lose trust in the data itself. Paginate your data, skeleton-load your components, and never block the initial render on wallet connection state.