NFT Marketplace
2023
* Images are for illustration purposes only
Secure multi-chain NFT trading platform with advanced swap mechanics.
Tech Stack
Key Features
- Multi-chain Architecture (ETH, Polygon, Solana)
- Gas-Optimized Smart Contracts (ERC-721/1155)
- Atomic Swaps & Bulk Transaction Engine
- Decentralized IPFS Storage Integration
- Real-time Market Indexer & Analytics
The Challenge
Fragmented liquidity across chains and high gas fees created a barrier for retail users entering the NFT space.
Constraints & Scale
The system needed to support Ethereum, Polygon, and Solana while maintaining sub-second latency for floor price updates and ensuring 100% smart contract security.
System Architecture
Hybrid architecture utilizing Next.js for the frontend, Solidity for smart contracts, and a custom Node.js indexer. IPFS handles decentralized storage, while PostgreSQL partitions store indexed market data.
Key Tradeoffs
We chose an off-chain order book with on-chain settlement to prioritize user experience and speed over pure decentralization. We also prioritized Polygon integration to lower gas fees, accepting the tradeoff of a slightly less decentralized network compared to Ethereum Mainnet.
Measurable Results
Processed over 50,000 transactions with zero security incidents. The custom indexer reduced data retrieval latency to under 2 seconds.
Project Details
Architected and deployed a secure, multi-chain NFT Marketplace supporting Ethereum, Polygon, and Solana ecosystems. The platform facilitates high-volume trading, atomic swaps, and bulk transactions, catering to both retail collectors and institutional traders. I engineered the smart contract infrastructure using Solidity (ERC-721/ERC-1155), ensuring gas optimization and security compliance. The system features a decentralized minting engine integrated with IPFS for immutable metadata storage and supports seamless wallet connectivity via RainbowKit and SIWE (Sign-In with Ethereum). To deliver real-time market intelligence, I built a high-performance indexer that aggregates on-chain data, floor prices, and trading history. The backend leverages PostgreSQL partitioning for scalability and WebSockets for instant order book updates, ensuring a responsive trading experience.
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