A personal project I built to deeply understand the full development lifecycle of a decentralized application (dApp). This project covers writing a smart contract with Solidity, local development using Hardhat, and building an interactive front-end interface.

Process & Key Features:

• Smart Contract Development: Wrote an ERC-721 smart contract from scratch using Solidity and performed local testing within a Hardhat environment.
• Testnet Deployment: Deployed the final contract to the public Sepolia Testnet for real-world simulation and interaction.
• On-Chain Interaction: Built the front-end using Next.js and the Ethers.js library to handle wallet connections (MetaMask) and all smart contract interactions (such as minting and fetching NFT data).

Technology Stack:

• Blockchain: Solidity, Hardhat, Ethers.js, Sepolia Testnet
• Frontend: React, Tailwind CSS
• Backend & Storage: Appwrite (for temporary metadata storage)

Learnings & Next Steps:

• Escrow Implementation: Evolving the smart contract to include an escrow system for guaranteed asset availability.
• Interoperability: Adding functionality to allow the marketplace to interact with external NFT contracts (full ERC-721 standard adoption).
• Migration to IPFS: Migrating metadata and image storage to IPFS for complete decentralization.

Source Code

• Contract Source Code: https://github.com/na....
• Frontend Source Code: https://github.com/na....
• Contract on Sepolia Etherscan: https://sepolia.etherscan.io/address/0....