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Multisig Transaction Previewer

Show signers what a pending multisig transaction will really do.

Intermediate16h1–2 people17/20 fit
TL;DR

Build Multisig Transaction Previewer for dao and treasury signers in ~16h with 1–2 people. Stack: Viem + Next.js + LLM.

Why it wins: Security tooling with a clear need.

Build flow

01 · Problem
Signers approve hex data they do not understand.
02 · Solution
Decode calldata with ABIs, simulate balance changes and explain the transaction in plain language before signing.
03 · Build
  1. 1Fetch pending txs
  2. 2Decode with ABIs
  3. 3Simulate
  4. 4Explain
04 · Demo
Decode a pending treasury transfer into a readable summary.

MVP checklist

  • Calldata decode
  • Balance diff
  • Plain summary
  • Risk flags

Tech stack

TechRole
ViemEthereum client
Next.jsFrontend + API routes
LLMLanguage model

Reference repos

Open-source projects you can build on. Links checked 2026-10-31.

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