GhostPass: Anonymous Wallet Verification

GhostPass is a privacy-focused Web3 application built during the Monad Hackathon that enables anonymous wallet verification without revealing any personal identity. This post covers the project goals, architecture, features, and implementation details.

📝 Prefer a personal behind-the-scenes read? Check out my 3-min blog post covering our hackathon experience in detail.

🧠 About the Monad Hackathon

The Monad Web3 Hackathon brought together blockchain developers, builders, and privacy advocates to experiment on top of Monad, a high-performance, EVM-compatible Layer 1 blockchain. Monad is designed for 10,000+ TPS, and its innovative consensus and execution engine enables scalable dApps without compromising decentralization.

During the hackathon, our team built GhostPass — a privacy-first wallet verification platform — within 6 hours.

Project: GhostPass

GhostPass is a privacy-focused platform for anonymous wallet verification on the blockchain. It allows users to prove wallet ownership and display verification status—without revealing personal identity.

🔐 Key Features

• Wallet Verification: Users sign a challenge to prove ownership of their wallet.
• Anonymous Identity: No personal data is collected; only public blockchain information is stored.
• Verification Lookup: Anyone can check verification status of any Ethereum wallet.
• Batch & Revoke Support: Admin tools for bulk verification and revoking.
• Modern Web Interface: Built with Next.js and TypeScript for a smooth user experience.

⚙️ How It Works

1. Connect & Verify

• Users connect via MetaMask or any EIP-1193 wallet.
• A message challenge is signed to prove ownership.
• Signature is verified server-side.
• On success, a verification transaction is submitted to the smart contract.
• The wallet address, verification timestamp, and transaction hash are logged.

2. Display Verified Users

• The backend maintains a list of verified wallets with:

  • address
  • verifiedAt timestamp
  • transactionHash

• This data is accessible via:

  • Public API (/verified-users)
  • UI-based lookup interface

3. Check Verification Status

• Anyone can check if a wallet is verified by querying:
  • /verify/:address

🛠️ Technology Stack

• Frontend: Next.js (React), TypeScript
• Backend: Node.js, Express, ethers.js
• Smart Contracts: Ethereum via Hardhat
• Wallet Integration: MetaMask or any EIP-1193-compatible wallet

📡 API Overview

🧪 Local Development Setup

Backend

bash
cd backend
npm install
# Set environment variables in .env
npm start