PreFlight

Preflight is a transaction intelligence platform built on and deployed on Monad that helps users understand exactly what they're signing before approving blockchain transactions. Today, wallets often present raw calldata, contract addresses, and gas fees, leaving users to blindly trust transactions they can't interpret. This has led to billions of dollars lost through phishing attacks, malicious approvals, and deceptive smart contracts. Preflight acts as a security layer between the wallet and the blockchain. Before a transaction is signed, it decodes the calldata into plain English, analyzes the transaction, calculates a risk score, checks the contract's on-chain reputation, and provides a clear recommendation to Sign or Reject. Key features include: * Human-readable transaction decoding * Risk scoring (Safe, Caution, High Risk) * Detection of unlimited token approvals and suspicious interactions * On-chain contract reputation registry deployed on Monad * Actionable security recommendations before execution Our backend analyzes transactions using Ethers.js and Fastify, while the frontend provides a clean security-focused interface that makes complex blockchain interactions easy to understand. Monad's high-performance infrastructure enables fast, low-cost reputation lookups and real-time analysis, making transaction reviews seamless. Preflight's mission is simple: every blockchain transaction should be understandable before it becomes irreversible. By combining transaction decoding, decentralized reputation, and intelligent risk analysis, we help users make informed decisions instead of blindly clicking "Confirm." While many security tools focus on detecting threats after they happen, Preflight protects users at the most critical moment—before they sign. It improves trust, reduces user error, and makes Web3 safer and more accessible for everyone.