NFT Security: Beyond the Basics

While basic NFT security is important, advanced projects require deeper considerations around royalties, marketplaces, and complex interactions.

Royalty Mechanism Security

Enforceable vs Non-Enforceable Royalties

• On-chain royalties: Enforced by the contract

• Off-chain royalties: Rely on marketplace compliance

• Consider EIP-2981 standard implementation

Royalty Implementation

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";

interface IERC2981 is IERC165 {
    function royaltyInfo(uint256 tokenId, uint256 salePrice)
        external view returns (address receiver, uint256 royaltyAmount);
}

Marketplace Integration Security

Preventing Unauthorized Transfers

• Implement proper access controls

• Use allowlists for trusted marketplaces

• Consider operator approvals carefully

Price Manipulation Protection

• Implement minimum price floors

• Use time-weighted pricing

• Monitor for wash trading

Batch Operations

Efficient Minting

function batchMint(address[] calldata recipients, uint256[] calldata tokenIds) external {
    require(recipients.length == tokenIds.length, "Arrays length mismatch");
    
    for (uint i = 0; i < recipients.length; ) {
        _safeMint(recipients[i], tokenIds[i]);
        unchecked { ++i; }
    }
}

Metadata Security

• Host metadata securely (IPFS, Arweave)

• Verify metadata integrity

• Implement metadata update mechanisms carefully

Advanced Features

Dynamic NFTs

• Consider state management complexity

• Validate state transitions

• Plan for metadata updates

Access Control

Implement role-based access for:

• Minting permissions

• Metadata updates

• Royalty configuration

Conclusion

NFT security extends far beyond basic token standards. Consider marketplace interactions, royalty enforcement, and complex feature sets carefully.