gistfile1.txt

// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.15;

contract Kickstarter{

    uint public minimumContribution;
    address public mananger;

    struct Request{
            string title;
            uint fundsRequired;
            address receiver;
            uint approvalCount;
            bool complete;
        }
        mapping ( address => bool ) public contributers;
        uint public countOfContributers;

    Request[] public requestsArray;

    function createRequest ( string memory _title , uint _funds , address _receiver ) public{
        requestsArray.push( Request( _title, _funds, _receiver, 0 , false ) );
    }


    modifier onlyOwner(){
        require(msg.sender == mananger);
        _;
    }

    constructor(){
        mananger = msg.sender;
    }

    mapping ( address => mapping( uint => bool )) approvalsOfAllRequests;


    function setMinimumContriibution ( uint _minContri ) public onlyOwner{
        minimumContribution = _minContri;
    }

    function contribute() public payable{
        require( msg.value > minimumContribution );

        if(contributers[msg.sender] == false){
            contributers[msg.sender] = true;
            countOfContributers++;
        }
        
    }

    function approveRequest( uint idOfRequestToApprove ) public {

        Request storage requestToApprove = requestsArray[idOfRequestToApprove];

        // if the sender is a contributer
        require( contributers[msg.sender] == true );

        // if the sender is an approver of request of this index 
        require( approvalsOfAllRequests[msg.sender][idOfRequestToApprove] == false );

        approvalsOfAllRequests[msg.sender][idOfRequestToApprove] = true;
        requestToApprove.approvalCount++;

    }
        

    function finaliseRequest( uint idOfRequestToApprove)  public onlyOwner {

        Request storage requestToApprove = requestsArray[idOfRequestToApprove];

        require ( requestToApprove.approvalCount > ( countOfContributers / 2 ) );
        require( requestToApprove.complete == false );
        require ( address(this).balance > requestToApprove.fundsRequired );

        requestToApprove.complete == true;  

        payable( requestToApprove.receiver ).transfer(requestToApprove.fundsRequired);
    }
}