Intermediate
Building a Simple DApp Frontend — Key concepts
Connect frontend to smart contracts.
Developer Intermediate
3/6 — Building a Simple DApp Frontend — Key concepts
Why it matters Users abandon DApps when UX is unclear. A crisp connect flow, live data that feels fresh, and honest pending/error states build trust. Avoid “sign this random hash” moments.
Design lens Treat chain guards, fee estimates, and retries as core features. Assume users will click twice, switch networks, and reject prompts—design for those realities.
Performance Cache reads, debounce refreshes, and reflect on-block changes so the UI feels alive without spamming RPCs. Make error messages actionable, not cryptic.
Security clarity Always show the contract address, method intent, and estimated cost. Never ask for signatures you cannot explain in plain language.
Key points
- Wallet connection:EIP-1193 providers, connect/disconnect UX, chain guards, session persistence.
- Reads:CallStatic/view, caching (React Query/SWR), stale-while-revalidate, block-based polling.
- Writes:Gas estimation, safety prompts, pending indicators, toasts, and showing hashes/links.
- Network guards:Force chain, handle rejections, auto-switch UI hints, disable buttons when mismatched.
- Security/UX:Show human-readable intent, never request blind signatures, detect missing funds, and provide retry/cancel paths.