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‎.env.schema

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HARDHAT_KLAYTN_BAOBAB_TESTNET_URL=
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HARDHAT_KLAYTN_ACCOUNT_PRIVATE_KEY=

‎.eslintrc.json

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{
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"extends": "next/core-web-vitals"
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}

‎.gitignore

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# Hardhat files
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/cache
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/artifacts
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# TypeChain files
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/typechain
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/typechain-types
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# solidity-coverage files
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/coverage
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/coverage.json
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# dependencies
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/node_modules
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/.pnp
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.pnp.js
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# testing
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/coverage
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# next.js
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/.next/
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/out/
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# production
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/build
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# misc
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.DS_Store
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*.pem
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# debug
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npm-debug.log*
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yarn-debug.log*
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yarn-error.log*
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# local env files
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.env
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.env.*
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!.env.example
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!.env.schema
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# vercel
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.vercel
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# typescript
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*.tsbuildinfo
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next-env.d.ts

‎.prettierrc

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{
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"tabWidth": 2,
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"singleQuote": true,
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"useTabs": true,
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"trailingComma": "all",
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"printWidth": 120
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}

‎README.md

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# houseform

‎contracts/HouseformManager.sol

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// SPDX-License-Identifier: MIT
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pragma solidity ^0.8.20;
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import '@openzeppelin/contracts/token/ERC721/IERC721.sol';
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import '@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol';
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import '@openzeppelin/contracts/access/Ownable.sol';
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contract HouseformManager is Ownable {
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struct ConstructionProject {
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address payable developer;
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uint256 goalAmount;
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uint256 currentAmount;
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uint256 totalInvestors;
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bool projectCompleted;
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uint256 fundraisingDeadline; // Deadline timestamp for reaching the fundraising goal
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uint256 completionDeadline; // Deadline timestamp for completing the project goal
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uint256 saleAmount; // Amount at which the project is sold
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uint256 developerShare; // Percentage of the sale amount that goes to the developer
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}
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mapping(uint256 => ConstructionProject) public constructionProjects;
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mapping(address => uint256[]) public developerProjects;
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mapping(uint256 => uint256) public nftIdToProjectId;
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address public houseformShareNFTAddress;
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event InvestmentMade(address investor, uint256 projectId, uint256 amount, uint256 sharesBought);
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event ProjectCompleted(uint256 projectId, uint256 totalReturns);
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event ShareNFTMinted(address indexed investor, uint256 indexed projectId, uint256 tokenId, uint256 sharesBought);
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event ShareRedeemed(address indexed investor, uint256 indexed projectId, uint256 amount);
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event ShareBurned(address indexed investor, uint256 indexed projectId, uint256 tokenId);
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event ProjectCancelled(uint256 projectId);
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event FundraisingFailed(uint256 projectId);
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modifier onlyProjectOwner(uint256 _projectId) {
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require(constructionProjects[_projectId].developer == msg.sender, 'Caller is not the project owner');
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_;
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}
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modifier onlyDeveloper(uint256 _projectId) {
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require(constructionProjects[_projectId].developer == msg.sender, 'Caller is not the project developer');
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_;
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}
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modifier onlyCustomer(uint256 _projectId) {
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require(_isCustomer(_projectId, msg.sender), 'Caller is not a customer for this project');
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_;
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}
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modifier projectNotCompleted(uint256 _projectId) {
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require(!constructionProjects[_projectId].projectCompleted, 'Project is already completed');
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_;
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}
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modifier projectNotCancelled(uint256 _projectId) {
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require(constructionProjects[_projectId].completionDeadline > 0, 'Project is cancelled');
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_;
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}
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modifier projectNotExpired(uint256 _projectId) {
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require(
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constructionProjects[_projectId].completionDeadline == 0 ||
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block.timestamp <= constructionProjects[_projectId].completionDeadline,
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'Project deadline expired'
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);
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_;
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}
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modifier fundraisingDeadlineNotExpired(uint256 _projectId) {
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require(
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constructionProjects[_projectId].fundraisingDeadline == 0 ||
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block.timestamp <= constructionProjects[_projectId].fundraisingDeadline,
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'Fundraising deadline expired'
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);
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_;
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}
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constructor() {}
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receive() external payable {
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// Handle received Ether, if necessary
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}
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function sethouseformShareNFT(address _houseformShareNFTAddress) external onlyOwner {
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houseformShareNFTAddress = _houseformShareNFTAddress;
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}
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function createConstructionProject(
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uint256 _projectId,
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uint256 _goalAmount,
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uint256 _fundraisingDeadline,
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uint256 _completionDeadline,
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uint256 _saleAmount,
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uint256 _developerShare
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) external {
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require(constructionProjects[_projectId].developer == address(0), 'Project already exists');
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require(_fundraisingDeadline >= block.timestamp, 'Fundraising deadline must be in the future');
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constructionProjects[_projectId] = ConstructionProject({
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developer: payable(msg.sender),
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goalAmount: _goalAmount,
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currentAmount: 0,
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totalInvestors: 0,
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projectCompleted: false,
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fundraisingDeadline: _fundraisingDeadline,
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completionDeadline: _completionDeadline,
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saleAmount: _saleAmount,
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developerShare: _developerShare
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});
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developerProjects[msg.sender].push(_projectId);
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}
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function invest(
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uint256 _projectId,
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uint256 _investmentAmount,
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uint256 _sharesToBuy
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)
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external
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payable
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onlyCustomer(_projectId)
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projectNotCompleted(_projectId)
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projectNotExpired(_projectId)
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fundraisingDeadlineNotExpired(_projectId)
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{
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ConstructionProject storage project = constructionProjects[_projectId];
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require(project.developer != address(0), 'Project does not exist');
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require(msg.value == _investmentAmount, 'Incorrect investment amount');
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require(
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_sharesToBuy > 0 && _sharesToBuy <= project.goalAmount.sub(project.currentAmount),
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'Invalid number of shares'
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);
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project.currentAmount = project.currentAmount.add(_investmentAmount);
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project.totalInvestors = project.totalInvestors.add(1);
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_mintShareNFT(msg.sender, _projectId, _sharesToBuy);
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emit InvestmentMade(msg.sender, _projectId, _investmentAmount, _sharesToBuy);
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if (project.currentAmount >= project.goalAmount) {
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_completeFundraising(_projectId);
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}
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}
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function _completeFundraising(uint256 _projectId) internal onlyDeveloper(_projectId) {
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ConstructionProject storage project = constructionProjects[_projectId];
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// If the goal is reached, cancel the fundraisingDeadline and allow completion of the project
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project.fundraisingDeadline = 0;
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// Emit event indicating successful fundraising
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emit FundraisingFailed(_projectId);
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}
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function redeemShare(
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uint256 _projectId
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)
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external
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onlyCustomer(_projectId)
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projectNotCompleted(_projectId)
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projectNotExpired(_projectId)
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projectNotCancelled(_projectId)
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{
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ConstructionProject storage project = constructionProjects[_projectId];
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// Check if the project completion deadline has passed
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require(block.timestamp > project.completionDeadline, 'Project completion deadline not reached');
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uint256 tokenId = _getInvestorTokenId(msg.sender, _projectId);
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_burnShareNFT(msg.sender, tokenId);
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uint256 amountToRedeem = (project.currentAmount * project.developerShare) / 100;
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payable(msg.sender).transfer(amountToRedeem);
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emit ShareRedeemed(msg.sender, _projectId, amountToRedeem);
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}
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function getProjectByNFTId(uint256 _nftId) external view returns (ConstructionProject memory) {
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uint256 projectId = nftIdToProjectId[_nftId];
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return constructionProjects[projectId];
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}
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function getAllProjects() external view returns (uint256[] memory) {
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uint256[] memory projectIds = developerProjects[msg.sender];
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return projectIds;
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}
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function getProjectById(uint256 _projectId) external view returns (ConstructionProject memory) {
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return constructionProjects[_projectId];
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}
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function getProjectsByDeveloper(address _developer) external view returns (uint256[] memory) {
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return developerProjects[_developer];
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}
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function _isCustomer(uint256 _projectId, address _customer) internal view returns (bool) {
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uint256[] storage customerProjects = developerProjects[_customer];
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for (uint256 i = 0; i < customerProjects.length; i++) {
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if (customerProjects[i] == _projectId) {
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return true;
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}
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}
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return false;
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}
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}

‎contracts/HouseformShareNFT.sol

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// SPDX-License-Identifier: MIT
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pragma solidity ^0.8.20;
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import '@openzeppelin/contracts/token/ERC721/ERC721.sol';
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import '@openzeppelin/contracts/access/Ownable.sol';
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contract HouseformShareNFT is ERC721, Ownable {
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constructor() ERC721('HouseformShareNFT', 'HS') {}
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function mintShares(address _to, uint256 _projectId, uint256 _amount) external onlyOwner {
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uint256 tokenId = totalSupply() + 1;
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_mint(_to, tokenId);
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_setTokenURI(tokenId, string(abi.encodePacked(_projectId, '-', _amount)));
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}
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function burnShares(uint256 _tokenId) external onlyOwner {
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_burn(_tokenId);
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}
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function getTokenProjectId(uint256 _tokenId) external view returns (uint256) {
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require(_exists(_tokenId), 'Token does not exist');
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string memory tokenURI = tokenURI(_tokenId);
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bytes memory tokenIdBytes = bytes(tokenURI);
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uint256 projectId = 0;
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for (uint256 i = 0; i < tokenIdBytes.length; i++) {
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if (tokenIdBytes[i] == '-') {
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projectId = parseInt(tokenURI, i + 1);
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break;
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}
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}
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return projectId;
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}
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function getTokenAmount(uint256 _tokenId) external view returns (uint256) {
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require(_exists(_tokenId), 'Token does not exist');
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string memory tokenURI = tokenURI(_tokenId);
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bytes memory tokenIdBytes = bytes(tokenURI);
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uint256 amount = 0;
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for (uint256 i = 0; i < tokenIdBytes.length; i++) {
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if (tokenIdBytes[i] == '-') {
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amount = parseInt(tokenURI, i + 1);
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break;
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}
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}
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return amount;
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}
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function parseInt(string memory _value, uint256 _startIndex) internal pure returns (uint256) {
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uint256 result = 0;
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for (uint256 i = _startIndex; i < bytes(_value).length; i++) {
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if ((uint8(bytes(_value)[i]) >= 48) && (uint8(bytes(_value)[i]) <= 57)) {
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result = result * 10 + (uint8(bytes(_value)[i]) - 48);
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}
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}
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return result;
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}
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}

‎hardhat.config.js

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require('@nomicfoundation/hardhat-toolbox');
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require('dotenv').config();
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module.exports = {
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solidity: '0.8.20',
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networks: {
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baobab: {
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url: process.env.HARDHAT_KLAYTN_BAOBAB_TESTNET_URL || '',
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gasPrice: 250000000000,
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accounts:
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process.env.HARDHAT_KLAYTN_ACCOUNT_PRIVATE_KEY !== undefined
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? [process.env.HARDHAT_KLAYTN_ACCOUNT_PRIVATE_KEY]
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: [],
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},
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},
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};

‎next.config.js

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module.exports = {
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webpack: (config, options) => {
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config.module.rules.push({
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test: /\.svg$/,
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use: ['@svgr/webpack'],
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});
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return config;
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},
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};

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