g4rrzx

Avalanche Full-stack dApp

A 5-day full-stack dApp built on Avalanche Fuji — smart contracts, Next.js frontend, NestJS backend

Avalanche Full-stack dApp is a complete Web3 application built on the Avalanche C-Chain as part of a 5-day short course at Universitas Pamulang. The goal was to go from an empty repo to a working, deployed dApp — smart contracts, frontend, and backend — in one week.

Stack

Blockchain

• Avalanche C-Chain (Fuji Testnet)
• Solidity
• Hardhat
• Viem + Wagmi

Frontend

• Next.js (App Router)
• TypeScript
• Tailwind CSS

Backend

• NestJS
• PostgreSQL (transaction data)
• MongoDB (event / log storage)

Deployment

• Vercel (frontend)
• VPS / Cloud (backend)

Links

• Live: avalanche-fullstack-dapp-sigma.vercel.app
• Source: github.com/g4rrzx/avalanche-fullstack-dapp

Notes

The project is deliberately structured as a real full-stack dApp rather than a toy contract demo — state that must live on-chain goes on-chain, high-volume event/log data lives in MongoDB, and normalised transaction records live in PostgreSQL so the app stays cheap and fast to query.

Working on this solidified three things for me: (1) how to split responsibilities between contract, backend, and frontend; (2) how to use Viem/Wagmi idiomatically for wallet UX; and (3) how to ship a Web3 app that looks and feels like a normal web app to the user.