Certainly! I'll modify the smart contract to include a matching donor and create a more comprehensive frontend for the application. Here's the updated implementation: First, let's update the Solidity smart contracts: ```solidity // SPDX-License-Identifier: MIT pragma solidity ^0.8.0; contract CrowdfundingProject { address public creator; address public matchingDonor; string public description; uint256 public goal; uint256 public totalFunds; uint256 public matchedFunds; bool public isClosed; event FundReceived(address donor, uint256 amount); event MatchedFundReceived(uint256 amount); event ProjectClosed(uint256 totalRaised); constructor(address _creator, string memory _description, uint256 _goal) { creator = _creator; description = _description; goal = _goal; totalFunds = 0; matchedFunds = 0; isClosed = false; } function setMatchingDonor(address _matchingDonor) public { require(msg.sender == creator, "Only creator can set matching donor"); require(matchingDonor == address(0), "Matching donor already set"); matchingDonor = _matchingDonor; } function donate() public payable { require(!isClosed, "Project is closed"); totalFunds += msg.value; emit FundReceived(msg.sender, msg.value); if (matchingDonor != address(0)) { matchedFunds += msg.value; emit MatchedFundReceived(msg.value); } if (totalFunds + matchedFunds >= goal) { isClosed = true; emit ProjectClosed(totalFunds + matchedFunds); } } function matchFunds() public payable { require(msg.sender == matchingDonor, "Only matching donor can match funds"); require(!isClosed, "Project is closed"); require(msg.value == matchedFunds, "Must match exact amount"); totalFunds += msg.value; matchedFunds = 0; if (totalFunds >= goal) { isClosed = true; emit ProjectClosed(totalFunds); } } function withdraw() public { require(msg.sender == creator, "Only creator can withdraw"); require(isClosed, "Project is not closed yet"); payable(creator).transfer(address(this).balance); } } contract CrowdfundingFactory { CrowdfundingProject[] public projects; event ProjectCreated(address projectAddress, address creator, string description, uint256 goal); function createProject(string memory _description, uint256 _goal) public { CrowdfundingProject newProject = new CrowdfundingProject(msg.sender, _description, _goal); projects.push(newProject); emit ProjectCreated(address(newProject), msg.sender, _description, _goal); } function getProjects() public view returns (CrowdfundingProject[] memory) { return projects; } } ``` Now, let's create a more comprehensive frontend using HTML, CSS, and JavaScript with Web3.js: ```html Web3 Crowdfunding

Web3 Crowdfunding

Create Project

Projects

``` This updated implementation includes the following new features: 1. A matching donor can be set for each project. 2. The matching donor can match the funds raised by other donors. 3. The frontend now displays more information about each project, including matched funds and a progress bar. 4. The UI has been improved with some basic CSS styling. To use this code: 1. Deploy the updated `CrowdfundingFactory` contract to your preferred Ethereum network. 2. Replace `YOUR_FACTORY_CONTRACT_ADDRESS` with the deployed factory contract address. 3. Add the correct ABIs for both the factory and project contracts. 4. Serve the HTML file using a local web server or host it on a web server. This implementation allows users to: - Create new projects by providing a description and funding goal - View all created projects with detailed information - Donate to open projects - Set a matching donor for a project - Match funds as the matching donor - Automatically close projects when they reach their funding goal Remember that this is still a basic implementation and would need additional features, error handling, and security measures for a production-ready application. You should also consider implementing proper testing, gas optimization, and using more advanced patterns like upgradeable contracts for a real-world application.

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