Decentralized NFT Marketplace

Abstract

<i>We present a decentralized NFT (Non-Fungible Token) marketplace built on the Ethereum blockchain. The platform allows users to mint, buy, and sell unique digital assets (e.g., art, collectibles) using Solidity smart contracts and a Web3-enabled frontend. All ownership records are stored on-chain for transparency and immutability, while large media data (images, metadata) are stored off-chain using IPFS. Users connect their wallets (e.g., MetaMask) via a React interface using Ethers.js, enabling peer-to-peer transactions without intermediaries. Key features include real-time transaction updates via blockchain event listeners and gas-optimized contract design. Security is enforced through standard libraries and audit practices to prevent common exploits (e.g., reentrancy, overflow). Performance evaluations show reasonable gas costs per transaction, demonstrating feasibility on Ethereum’s current throughput. Future work includes expanding cross-chain support and enhanced scalability.</i>