Case study
Built a secure, high-throughput NFT marketplace on Ethereum that processed over $10M in transactions in its first six months.
Client
ArtChain
Industry
AI for Product Design & Testing
Technology
Ethereum, Solidity, IPFS
Timeline
18 weeks
Key outcomes
$10M+
GMV
first six months post-launch
50K+
Active Wallets
unique connected wallets
99.97%
Uptime
across 3 major drop events
100K+
NFTs Minted
including lazy-minted items
The challenge
ArtChain's founding team had a clear product vision but no smart-contract engineering depth. Their MVP, built by a freelancer, had two unaudited reentrancy vulnerabilities and couldn't support lazy minting — meaning creators paid gas upfront, killing adoption. They needed a rebuild they could stake their reputation on.
Our approach
We rewrote the smart contracts from scratch using ERC-721A for batch efficiency, added lazy minting via off-chain signatures, and pinned metadata to IPFS via Pinata. The React frontend connects to MetaMask, WalletConnect, and Coinbase Wallet. All contracts were audited by an independent firm before deployment.
Results & impact
The marketplace reached $10M GMV within six months without a single security incident. Lazy minting drove a 4× increase in creator onboarding by eliminating upfront gas costs. The platform sustained 99.97% uptime across three major drop events.
What we delivered
Audited ERC-721A Smart Contracts
Gas-optimised batch mint contracts with lazy minting via EIP-712 signatures.
IPFS Metadata Pipeline
Creator upload flow that pins artwork and metadata to IPFS via Pinata before mint.
Multi-Wallet Frontend
React + wagmi integration supporting MetaMask, WalletConnect, and Coinbase Wallet.
Independent Security Audit
Third-party audit report with all findings resolved before mainnet deployment.
“
The team understood that a marketplace lives or dies on creator trust. Lazy minting wasn't a nice-to-have — it was the unlock. They got that without us having to explain it twice.
Marcus Reid
Co-Founder & CEO · ArtChain
