NFT Marketplace
Smart Contract SystemA comprehensive NFT marketplace system supporting fixed-price listings, English auctions, and peer-to-peer offers with institutional-grade security.
Core Features
Fixed-Price Listings
Direct NFT sales with instant purchase capability at fixed prices set by sellers.
English Auctions
Time-based auction system with competitive bidding and automatic winner settlement.
Royalty System
Creator royalties on secondary sales with automatic distribution to designated addresses.
Auction Mechanisms
English Auction Details
- Ascending bid mechanism
- Configurable duration
- Minimum bid increments
- Automatic winner settlement
Buyout Options
- Immediate buyout price
- Auction termination on buyout
- Seller flexibility
- Buyer convenience
Security Features
Protection Mechanisms
- ReentrancyGuard on all transfers
- CEI Pattern enforcement
- Approval Validation checks
- Auction State Verification
Risk Mitigation
- Double-spend prevention
- Invalid auction state handling
- Unauthorized access prevention
- Royalty manipulation resistance
Comprehensive Testing
Full test coverage for all marketplace operations including listings, auctions, offers, and royalty distributions.
| Feature | Tests | Scope |
|---|---|---|
| Fixed Listings | 25+ | Create, cancel, purchase listings |
| English Auctions | 35+ | Bidding, settlement, buyout logic |
| Royalties | 20+ | Distribution, calculations, edge cases |
| Security | 15+ | Reentrancy, state validation |