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Intent Wallet

Intent-based Web3 wallet for X402

AIBuild Onchain FBI

About this project

The problem it solves

Most Web3 applications today still rely on low-level transaction signing, confusing wallet popups, and complex flows that overwhelm users. Developers who want to build intent-based or abstracted experiences struggle with:

  1. Setting up a clean backend structure

  2. Handling signatures, verification, or webhook-style flows

  3. Managing API routes, logging, raw request capture

  4. Quickly iterating on a frontend + backend together

  5. Deploying a production-ready server without friction

IntentWallet solves this by providing a minimal, modular, and scalable boilerplate for intent-driven applications. It offers an Express + TypeScript backend with automatic logging, raw body capture, JSON introspection, Vite-powered frontend development, and seamless Railway deployment.

This allows developers to focus on building intent logic instead of fighting framework setup. With IntentWallet, building modern intent-based dApps or payment flows becomes much faster, cleaner, and more reliable.

Challenges we ran into

Raw Body Parsing for Verification Handling raw request bodies (for signature verification or webhook flows) conflicted with Express’ JSON middleware. I solved this by creating a custom middleware that captures raw data before parsing.

Shared Server Instance for WebSocket Upgrades I needed both Express routes and potential WebSocket upgrades from a single server instance. The fix was exporting the server reference and restructuring the initialization logic.

Vite + Express Integration Running a full-stack dev environment with hot reload on both backend and frontend was tricky. I solved it by conditionally enabling Vite in development and static serving in production.

Railway Deployment Port Issues Railway assigns dynamic ports, which initially caused binding failures. This was fixed by using process.env.PORT and binding to 0.0.0.0.

Maintaining Clean Route Structure Express projects often get messy as they grow. I designed a registerRoutes loader that automatically registers modular routes.

These challenges helped me build a cleaner, scalable foundation for future intent-based applications.

About the founder

Building on Base from India

Technologies and tags

Node.jsExpress.jsTypeScriptVite (development frontend)Railway (Deployment)Middleware patternRaw body capture