사례 연구: Ippy의 파생작 등록하기

contract PiPi is ERC721, Ownable, IERC721Receiver {

  // ... some code here ...

  function whitelistMint() external payable returns (string memory, address) {
    require(whitelistMintEnabled, "Whitelist mint is not active");
    require(whitelist[msg.sender], "Address not whitelisted");
    require(mintedCount[msg.sender] < WHITELIST_MAX_P_WALLET, "Whitelist mint limit reached");
    require(_totalSupply < MAX_SUPPLY, "Max supply reached");

    return _mintNFT(msg.sender);
  }

  function _mintNFT(address recipient) internal returns (string memory, address) {
    uint256 newTokenId = _totalSupply + 1;
    _safeMint(address(this), newTokenId);

    address ipId = _registerAsIPAsset(newTokenId);

    string memory nftUri = tokenURI(newTokenId);
    bytes32 metadataHash = keccak256(abi.encodePacked(nftUri));
    CORE_METADATA_MODULE.setAll(ipId, nftUri, metadataHash, metadataHash);

    registerDerivativeForToken(ipId);

    _safeTransfer(address(this), recipient, newTokenId, "");

    // ... more code here ...

    return (nftUri, ipId);
  }
}

function _registerAsIPAsset(uint256 tokenId) internal returns (address) {
  try IP_ASSET_REGISTRY.register(block.chainid, address(this), tokenId) returns (address ipId) {
    require(ipId != address(0), "IP Asset registration failed");
    return ipId;
  } catch Error(string memory reason) {
    revert(reason);
  } catch {
    revert("IP Asset registration failed");
  }
}

// handles the NFT's `nftMetadataHash`
// handles the IP's `ipMetadataURI` and `ipMetadataHash`
function _mintNFT(address recipient) internal returns (string memory, address) {

  // ... some code here ...

  string memory nftUri = tokenURI(newTokenId);
  bytes32 metadataHash = keccak256(abi.encodePacked(nftUri));
  CORE_METADATA_MODULE.setAll(ipId, nftUri, metadataHash, metadataHash);

  // ... some code here ...

}

// handles the NFT's `nftMetadataURI`
function tokenURI(uint256 tokenId) public view override returns (string memory) {
  return string(abi.encodePacked(_baseUri, StringUtils.uint2str(tokenId), ".json"));
}

function registerDerivativeForToken(address ipId) internal {
  address[] memory parentIpIds = new address[](1);
  parentIpIds[0] = 0xB1D831271A68Db5c18c8F0B69327446f7C8D0A42;

  uint256[] memory licenseTermsIds = new uint256[](1);
  licenseTermsIds[0] = 1;

  address licenseTemplate = 0x2E896b0b2Fdb7457499B56AAaA4AE55BCB4Cd316;
  bytes memory royaltyContext = hex"0000000000000000000000000000000000000000";
  uint256 maxMintingFee = 0;
  uint32 maxRts = 0;
  uint32 maxRevenueShare = 0;

  LICENSING_MODULE.registerDerivative(
    ipId,
    parentIpIds,
    licenseTermsIds,
    licenseTemplate,
    royaltyContext,
    maxMintingFee,
    maxRts,
    maxRevenueShare
  );
}

function _mintNFT(address recipient) internal returns (string memory, address) {
  // ... some code here ...
  _safeTransfer(address(this), recipient, newTokenId, "");
  // ... some code here ...
}