SafeLens

Offline transaction verifier for Safe multisig wallets with ERC-7730 clear signing.

Generator · Desktop App · CLI

What it does

SafeLens generates and verifies evidence packages for Gnosis Safe multisig transactions. Paste a Safe transaction URL into the generator, download the evidence.json, then verify signatures and hashes offline using the desktop app or CLI.

• Generate an evidence.json package from any Safe transaction URL
• Verify signatures, hashes, and decoded calldata locally with zero network access
• Clear signing via built-in and ERC-7730 interpreters for human-readable transaction details

Trust model

The desktop verifier ships with connect-src 'none' CSP and no shell-open capability, it cannot make network requests during verification. All crypto runs locally using bundled libraries. See TRUST_ASSUMPTIONS.md for the full model.

Quick start

Generate an evidence package at safelens.lfg.rs, or via CLI:

bun --cwd packages/cli dev analyze "https://app.safe.global/transactions/tx?..." --out evidence.json

Verify offline:

bun --cwd packages/cli dev verify --file evidence.json

Screenshots

Desktop App

Transaction Details

ERC-7730 Clear Signing Interpreters

CLI

Transaction Interpretation

Verification

Generator

Evidence Package

Development

Project structure, setup, and build instructions

Structure

Path	Description
apps/generator	Next.js webapp, creates and exports evidence.json
apps/desktop	Tauri + Vite desktop app, verifies evidence offline
packages/core	Shared validation, hashing, signature verification, warnings
packages/cli	CLI wrapper over core logic

Setup

Requires Bun.

bun install

Run

bun run dev          # generator at localhost:3000
bun run dev:tauri    # desktop app (full Tauri shell)
bun run dev:desktop  # desktop frontend only (no Tauri)

Build

bun run build        # generator + desktop frontend assets
bun run build:tauri  # full desktop distributable

Settings

Settings are JSON (address book and contract registry).

• CLI: ~/.safelens/settings.json
• Desktop: app data folder

bun --cwd packages/cli dev settings init   # initialize settings
bun --cwd packages/cli dev sources         # show verification sources

Cleanup

rm -rf apps/generator/.next apps/desktop/src-tauri/target apps/desktop/src-tauri/.tauri apps/desktop/src-tauri/Cargo.lock .opencode