CertiChain
CertiChain is a beginner-friendly Web3 dApp for minting NFT certificates on Base Sepolia with gas paid through UGF instead of ETH. This project was built as a hackathon submission to demonstrate how onchain actions can feel simpler for everyday users. A user connects a wallet, fills in certificate details, and mints a certificate NFT without needing native gas tokens in the usual way.
Submitted Jun 6, 2026
Team size 6
Problem
This project aligns with the hackathon challenge: Build a beginner-friendly dApp on Base Sepolia Use UGF so users can pay gas with Mock USD instead of ETH Make a real and useful onchain action work smoothly CertiChain fits the minting track by turning certificate issuance into a gasless NFT minting experience.
How UGF was used
The user connects a wallet. The app switches the wallet to Base Sepolia. The user enters certificate details. Metadata is generated for the NFT certificate. The app creates the mint(address,string) calldata. UGF quotes and settles the gas flow using Mock USD. The NFT certificate is minted on Base Sepolia.