Building NFT Marketplaces: Complete Guide

Creating Your NFT Marketplace

NFT marketplaces combine smart contracts, IPFS storage, and modern web technologies. This guide walks you through building one from scratch.

Architecture Overview

• Smart contracts for minting, listing, and trading
• IPFS for decentralized metadata storage
• Frontend with Web3 integration
• Indexing layer (TheGraph) for queries

Smart Contract Structure

contract NFTMarketplace {
    struct Listing {
        uint256 tokenId;
        address seller;
        uint256 price;
        bool active;
    }

    mapping(uint256 => Listing) public listings;

    function createListing(uint256 tokenId, uint256 price) external {
        // Implementation
    }

    function buyNFT(uint256 tokenId) external payable {
        // Implementation
    }
}