Lumenda: Fast, Low-Cost Remittances on Stacks Blockchain - Built with GitHub Copilot CLI

kushi Numdin E. — Sat, 14 Feb 2026 18:05:40 +0000

This is a submission for the GitHub Copilot CLI Challenge

What I Built

Lumenda is a decentralized remittance platform built on Stacks (Bitcoin L2) that enables fast, low-cost international money transfers. This project represents my vision of making cross-border payments more accessible, transparent, and affordable by leveraging blockchain technology.

Key Features

🚀 Fast Transfers: Near-instant settlement using Stacks blockchain with escrow-based security

💰 Low Fees: 1-2% transaction fees compared to 5-10% in traditional remittance services

🔒 Secure: All transactions are secured by Bitcoin's blockchain with smart contract escrow

🌍 Global Access: Send money anywhere, anytime without intermediaries

📊 Transparent History: Complete transaction history with real-time status tracking

💳 Wallet Integration: Seamless integration with Leather and Hiro wallets

Technical Stack

Smart Contracts: Clarity contracts on Stacks blockchain (escrow, remittance, fee management)
Frontend: Next.js 16 with React 19, TypeScript, and Tailwind CSS
State Management: Convex for real-time data synchronization
Blockchain Integration: Stacks.js for wallet connections and contract interactions
Architecture: Modular, SOLID principles with separation of concerns

What Makes It Special

Lumenda solves real-world problems:

Escrow System: Funds are held in escrow until the recipient confirms receipt, protecting both parties
Real-time Tracking: Users can see transfer status, transaction history, and pending transfers
Optimized Performance: Implemented parallel API calls and Convex-first architecture for fast loading
Production-Ready: Full error handling, loading states, and user-friendly notifications

This project means a lot to me because it demonstrates how blockchain technology can create practical solutions for everyday financial challenges, making remittances more accessible to people worldwide.

Demo

🎥 Video Walkthrough: Watch the full demo on YouTube

The video demonstrates:

00:15 - Wallet Connection
00:31 - Dashboard Overview with balance and recent transfers
00:50 - Sending Money with real-time fee calculation
01:38 - Viewing transactions on Stacks Explorer
01:50 - Complete transaction history
02:02 - Receiving funds through the escrow system
03:10 - The importance of GitHub Copilot CLI in building this project

🌐 Live Application: lumenda.vercel.app

💻 GitHub Repository: github.com/numdinkushi/Lumenda

Key Features Shown in Video

Dashboard: Real-time wallet balance, recent transfers, and pending transfer notifications
Send Money: Intuitive interface with escrow explanation and fee calculations
Transaction History: Complete transfer history with blockchain explorer links
Escrow System: Secure fund holding until recipient completes the transfer
Wallet Integration: Seamless connection with Leather wallet

Key Workflows

Initiate Transfer: Connect wallet → Enter recipient address and amount → Review fees → Confirm transaction
Complete Transfer: Receive notification → Review transfer details → Complete via wallet → Funds released
View History: Access complete transaction history with filtering and search capabilities

My Experience with GitHub Copilot CLI

Building Lumenda with AI-assisted development was transformative. Here's how it impacted my development experience:

Rapid Prototyping & Architecture

GitHub Copilot CLI helped me quickly scaffold the entire project structure, from smart contract architecture to frontend components. When designing the escrow system, I could describe the requirements and get a solid foundation that I could then refine.

Complex Problem Solving

One of the most challenging aspects was implementing the transfer lifecycle with proper state management. Copilot CLI helped me:

Design the Convex database schema for tracking transactions and transfers
Implement the dual-source data loading (blockchain + database) for optimal performance
Handle edge cases like wallet timeouts, transaction failures, and network errors

React Hooks & Best Practices

When I encountered React Hooks rule violations and infinite re-render issues, Copilot CLI provided solutions that followed React best practices:

Restructuring effects to avoid synchronous setState calls
Implementing proper dependency arrays
Using refs and memoization to prevent unnecessary re-renders

Deployment & Configuration

Configuring Vercel for a monorepo structure was tricky. Copilot CLI helped me:

Create the correct vercel.json configuration
Understand the relationship between root directory settings and build commands
Debug deployment issues and optimize the build process

Code Quality & Consistency

Throughout development, Copilot CLI ensured:

Consistent TypeScript types across the codebase
Proper error handling patterns
Clean, maintainable code structure
Following Next.js and React best practices

Learning & Growth

Perhaps most importantly, working with Copilot CLI accelerated my learning:

I learned new patterns and approaches I might not have considered
It helped me understand complex concepts like Convex real-time synchronization
I discovered better ways to structure React components and hooks

Time Saved

What would have taken weeks of development was accomplished in days. The AI assistant handled:

Boilerplate code generation
Debugging complex issues
Writing comprehensive error handling
Optimizing performance bottlenecks

The Human-AI Collaboration

The best part was the collaborative nature. Copilot CLI didn't replace my thinking—it amplified it. I could focus on:

High-level architecture decisions
User experience design
Business logic and feature requirements
Testing and refinement

While Copilot CLI handled:

Implementation details
Repetitive code patterns
Configuration files
Debugging assistance

This partnership allowed me to build a production-ready application that I'm proud to showcase.

Built with ❤️ on Stacks (Bitcoin L2)

Lumenda - Making remittances accessible, one transaction at a time.

Forem: kushi Numdin E.