Lets new users act on-chain with just an email-style login and no gas
Advanced48h2–4
SolidityAccount abstractionviem
15/20Wallet Activity Explainer
Explains a wallet’s transactions in plain English.
Beginner12h1–2 people15/20 fit
Build Wallet Activity Explainer for new crypto users in ~12h with 1–2 people. Stack: Next.js + viem + LLM.
Why it wins: Makes Web3 approachable in one screen.
Build flow
01 · Problem
Block explorers are unreadable for beginners.
02 · Solution
Paste an address. Recent transactions are decoded and explained as simple sentences.
03 · Build
- 1Fetch transactions via RPC
- 2Decode with ABIs
- 3LLM explanations
- 4Timeline UI
04 · Demo
Paste a public testnet address → “You swapped token A for token B” style timeline.
MVP checklist
- Address input
- Decoded transactions
- Plain-English timeline
- Risk hints
Tech stack
| Tech | Role | |
|---|---|---|
| Next.js | Frontend + API routes | Web |
| viem | Ethereum client | Chain |
| LLM | Language model | AI |
Reference repos
Open-source projects you can build on. Links checked 2026-10-31.
Related ideas
More Web3Summarizes long governance proposals before a vote
Beginner12h1–2Next.jsLLM15/20Show signers what a pending multisig transaction will really do
Intermediate16h1–2ViemNext.jsLLM17/20