1// SPDX-License-Identifier: Apache License2pragma solidity >=0.8.0;3import {CollectionHelpers} from "../api/CollectionHelpers.sol";4import {ContractHelpers} from "../api/ContractHelpers.sol";5import {UniqueRefungibleToken} from "../api/UniqueRefungibleToken.sol";6import {UniqueRefungible} from "../api/UniqueRefungible.sol";7import {UniqueNFT} from "../api/UniqueNFT.sol";89contract Fractionalizer {10 struct Token {11 address _collection;12 uint256 _tokenId;13 }14 address rftCollection;15 mapping(address => bool) nftCollectionAllowList;16 mapping(address => mapping(uint256 => uint256)) nft2rftMapping;17 mapping(address => Token) rft2nftMapping;18 address owner;19 bytes32 refungibleCollectionType = keccak256(bytes("ReFungible"));2021 constructor() {22 owner = msg.sender;23 }2425 modifier onlyOwner() {26 require(msg.sender == owner, "Only owner can");27 _;28 }2930 event RFTCollectionSet(address _collection);31 event AllowListSet(address _collection, bool _status);32 event Fractionalized(address _collection, uint256 _tokenId, address _rftToken, uint128 _amount);33 event Defractionalized(address _rftToken, address _nftCollection, uint256 _nftTokenId);3435 function setRFTCollection(address _collection) public onlyOwner {36 require(37 rftCollection == address(0),38 "RFT collection is already set"39 );40 UniqueRefungible refungibleContract = UniqueRefungible(_collection);41 string memory collectionType = refungibleContract.uniqueCollectionType();42 43 require(44 keccak256(bytes(collectionType)) == refungibleCollectionType,45 "Wrong collection type. Collection is not refungible."46 );47 require(48 refungibleContract.verifyOwnerOrAdmin(),49 "Fractionalizer contract should be an admin of the collection"50 );51 rftCollection = _collection;52 emit RFTCollectionSet(rftCollection);53 }5455 function createAndSetRFTCollection(string calldata _name, string calldata _description, string calldata _tokenPrefix) public onlyOwner {56 require(57 rftCollection == address(0),58 "RFT collection is already set"59 );60 address collectionHelpers = 0x6C4E9fE1AE37a41E93CEE429e8E1881aBdcbb54F;61 rftCollection = CollectionHelpers(collectionHelpers).createRefungibleCollection(_name, _description, _tokenPrefix);62 emit RFTCollectionSet(rftCollection);63 }6465 function setNftCollectionIsAllowed(address collection, bool status) public onlyOwner {66 nftCollectionAllowList[collection] = status;67 emit AllowListSet(collection, status);68 }6970 function nft2rft(address _collection, uint256 _token, uint128 _pieces) public {71 require(72 rftCollection != address(0),73 "RFT collection is not set"74 );75 UniqueRefungible rftCollectionContract = UniqueRefungible(rftCollection);76 require(77 nftCollectionAllowList[_collection] == true,78 "Fractionalization of this collection is not allowed by admin"79 );80 require(81 UniqueNFT(_collection).ownerOf(_token) == msg.sender,82 "Only token owner could fractionalize it"83 );84 UniqueNFT(_collection).transferFrom(85 msg.sender,86 address(this),87 _token88 );89 uint256 rftTokenId;90 address rftTokenAddress;91 UniqueRefungibleToken rftTokenContract;92 if (nft2rftMapping[_collection][_token] == 0) {93 rftTokenId = rftCollectionContract.nextTokenId();94 rftCollectionContract.mint(address(this), rftTokenId);95 rftTokenAddress = rftCollectionContract.tokenContractAddress(rftTokenId);96 nft2rftMapping[_collection][_token] = rftTokenId;97 rft2nftMapping[rftTokenAddress] = Token(_collection, _token);9899 rftTokenContract = UniqueRefungibleToken(rftTokenAddress);100 rftTokenContract.setParentNFT(_collection, _token);101 } else {102 rftTokenId = nft2rftMapping[_collection][_token];103 rftTokenAddress = rftCollectionContract.tokenContractAddress(rftTokenId);104 rftTokenContract = UniqueRefungibleToken(rftTokenAddress);105 }106 rftTokenContract.repartition(_pieces);107 rftTokenContract.transfer(msg.sender, _pieces);108 emit Fractionalized(_collection, _token, rftTokenAddress, _pieces);109 }110111 function rft2nft(address _collection, uint256 _token) public {112 require(113 rftCollection != address(0),114 "RFT collection is not set"115 );116 require(117 rftCollection == _collection,118 "Wrong RFT collection"119 );120 UniqueRefungible rftCollectionContract = UniqueRefungible(rftCollection);121 address rftTokenAddress = rftCollectionContract.tokenContractAddress(_token);122 Token memory nftToken = rft2nftMapping[rftTokenAddress];123 require(124 nftToken._collection != address(0),125 "No corresponding NFT token found"126 );127 UniqueRefungibleToken rftTokenContract = UniqueRefungibleToken(rftTokenAddress);128 require(129 rftTokenContract.balanceOf(msg.sender) == rftTokenContract.totalSupply(),130 "Not all pieces are owned by the caller"131 );132 rftCollectionContract.transferFrom(msg.sender, address(this), _token);133 UniqueNFT(nftToken._collection).transferFrom(134 address(this),135 msg.sender,136 nftToken._tokenId137 );138 emit Defractionalized(rftTokenAddress, nftToken._collection, nftToken._tokenId);139 }140}