smart contract + remove node_modules

.gitignore

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+node_modules/

contracts/CeloCrowdfund.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity >=0.4.22 <0.9.0;
+
+// Importing OpenZeppelin's SafeMath Implementation
+import "@openzeppelin/contracts/utils/math/SafeMath.sol";
+
+contract CeloCrowdfund {
+  // SafeMath for safe integer operations
+  using SafeMath for uint256; 
+
+  // List of all the projects
+  Project[] private projects; 
+
+  // event for when new project starts
+  event ProjectStarted(
+    address contractAddress,
+    address projectCreator,
+    string title,
+    string description, 
+    string imageLink,  
+    uint256 fundRaisingDeadline,
+    uint256 goalAmount
+  ); 
+
+  function startProject(
+    string calldata title,
+    string calldata description,
+    string calldata imageLink, 
+    uint durationInDays, 
+    uint amountToRaise
+  ) external {
+    uint raiseUntil = block.timestamp.add(durationInDays.mul(1 days)); 
+
+    Project newProject = new Project (payable(msg.sender), title, description, imageLink, raiseUntil, amountToRaise); 
+    projects.push(newProject); 
+
+    emit ProjectStarted(
+      address(newProject),
+      msg.sender, 
+      title,
+      description, 
+      imageLink, 
+      raiseUntil, 
+      amountToRaise
+    );
+  }
+
+  function returnProjects() external view returns(Project[] memory) {
+    return projects; 
+  }
+}
+
+contract Project {
+  using SafeMath for uint256; 
+
+  enum ProjectState {
+    Fundraising, 
+    Expired, 
+    Successful
+  }
+
+  // Initialize public variables
+  address payable public creator; 
+  uint public goalAmount; 
+  uint public completeAt; 
+  uint256 public currentBalance; 
+  uint public raisingDeadline; 
+  string public title;
+  string public description; 
+  string public imageLink;
+
+  // Initialize state at fundraising
+  ProjectState public state = ProjectState.Fundraising; 
+  mapping (address => uint) public contributions;
+
+  // Event when funding is received
+  event ReceivedFunding(address contributor, uint amount, uint currentTotal);
+
+  // Event for when the project creator has received their funds
+  event CreatorPaid(address recipient); 
+
+  modifier theState(ProjectState _state) {
+    require(state == _state);
+    _; 
+  }
+
+  constructor
+  (
+    address payable projectCreator, 
+    string memory projectTitle,
+    string memory projectDescription,
+    string memory projectImageLink, 
+    uint fundRaisingDeadline,
+    uint projectGoalAmount
+  ) {
+    creator = projectCreator; 
+    title = projectTitle; 
+    description = projectDescription;
+    imageLink = projectImageLink;
+    goalAmount = projectGoalAmount;
+    raisingDeadline = fundRaisingDeadline;
+    currentBalance = 0; 
+  }
+
+  // Fund a project
+  function contribute() external theState(ProjectState.Fundraising) payable {
+    require(msg.sender != creator);
+    contributions[msg.sender] = contributions[msg.sender].add(msg.value);
+    currentBalance = currentBalance.add(msg.value);
+    emit ReceivedFunding(msg.sender, msg.value, currentBalance);
+    checkIfFundingCompleteOrExpired();
+  }
+
+  // check project state
+  function checkIfFundingCompleteOrExpired() public {
+    if (currentBalance >= goalAmount) {
+      state = ProjectState.Successful; 
+      payOut(); 
+    } else if (block.timestamp > raisingDeadline) {
+      state = ProjectState.Expired;
+    }
+    completeAt = block.timestamp; 
+  }
+
+  function payOut() internal theState(ProjectState.Successful) returns (bool) {
+    uint256 totalRaised = currentBalance; 
+    currentBalance = 0; 
+
+    if (creator.send(totalRaised)) {
+      emit CreatorPaid(creator);
+      return true; 
+    } else { 
+      currentBalance = totalRaised; 
+      state = ProjectState.Successful;
+    }
+
+    return false; 
+  }
+
+  function getDetails() public view returns 
+  (
+    address payable projectCreator, 
+    string memory projectTitle,
+    string memory projectDescription,
+    string memory projectImageLink, 
+    uint fundRaisingDeadline,
+    ProjectState currentState, 
+    uint256 projectGoalAmount,
+    uint256 currentAmount
+  ) {
+    projectCreator = creator; 
+    projectTitle = title;
+    projectDescription = description;
+    projectImageLink = imageLink; 
+    fundRaisingDeadline = raisingDeadline;
+    currentState = state; 
+    projectGoalAmount = goalAmount; 
+    currentAmount = currentBalance; 
+  }
+}