Design Patterns MCP Server

{ "id": "enforceable-royalties", "name": "On-Chain Enforceable Royalties", "category": "NFT Royalty", "description": "Restrict transfers to approved marketplaces that honor royalties. Cannot be bypassed.", "when_to_use": "Creator-focused projects prioritizing royalty enforcement over liquidity", "benefits": "Cannot be bypassed, guaranteed creator revenue", "drawbacks": "Restricts transferability, reduces liquidity, marketplace whitelist required", "use_cases": "Creator-first platforms, art with mandatory royalties", "complexity": "Medium", "tags": [ "nft", "royalty", "enforceable", "creator-economy", "restriction" ], "examples": { "solidity": { "language": "solidity", "code": "contract EnforceableRoyaltyNFT is ERC721 {\n mapping(address => bool) public approvedMarketplaces;\n \n function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal override {\n if (from != address(0) && to != address(0)) { // Not mint/burn\n require(\n approvedMarketplaces[msg.sender] || \n msg.sender == from, \n \"Must use approved marketplace\"\n );\n }\n super._beforeTokenTransfer(from, to, tokenId);\n }\n}" } } }