Last active
August 29, 2022 10:25
-
-
Save ac12644/98b2e9b2fba5cedf0b388a6e106b07b0 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
// SPDX-License-Identifier: MIT | |
pragma solidity ^0.8.0; | |
import '@openzeppelin/contracts/access/Ownable.sol'; | |
import '@openzeppelin/contracts/utils/math/SafeMath.sol'; | |
contract Fundraiser is Ownable { | |
using SafeMath for uint256; | |
struct Donation { | |
uint256 value; | |
uint256 date; | |
} | |
mapping(address => Donation[]) private _donations; | |
event DonationReceived(address indexed donor, uint256 value); | |
event Withdraw(uint256 amount); | |
string public name; | |
string public linkToCompany; | |
string public images; | |
string public description; | |
string public about; | |
address payable public beneficiary; | |
uint256 public totalDonations; | |
uint256 public donationsCount; | |
constructor( | |
string memory _name, | |
string memory _linkToCompany, | |
string memory _images, | |
string memory _description, | |
string memory _about, | |
address payable _beneficiary, | |
address _custodian | |
) public { | |
name = _name; | |
linkToCompany = _linkToCompany; | |
images = _images; | |
description = _description; | |
about = _about; | |
beneficiary = _beneficiary; | |
_transferOwnership(_custodian); | |
} | |
function setBeneficiary(address payable _beneficiary) public onlyOwner { | |
beneficiary = _beneficiary; | |
} | |
function myDonationsCount() public view returns (uint256) { | |
return _donations[msg.sender].length; | |
} | |
function donate() public payable { | |
Donation memory donation = Donation({ | |
value: msg.value, | |
date: block.timestamp | |
}); | |
_donations[msg.sender].push(donation); | |
totalDonations = totalDonations.add(msg.value); | |
donationsCount++; | |
emit DonationReceived(msg.sender, msg.value); | |
} | |
function myDonations() public view returns ( | |
uint256[] memory values, | |
uint256[] memory dates | |
) | |
{ | |
uint256 count = myDonationsCount(); | |
values = new uint256[](count); | |
dates = new uint256[](count); | |
for (uint256 i = 0; i < count; i++) { | |
Donation storage donation = _donations[msg.sender][i]; | |
values[i] = donation.value; | |
dates[i] = donation.date; | |
} | |
return (values, dates); | |
} | |
function withdraw() public onlyOwner { | |
uint256 balance = address(this).balance; | |
beneficiary.transfer(balance); | |
emit Withdraw(balance); | |
} | |
fallback() external payable { | |
totalDonations = totalDonations.add(msg.value); | |
donationsCount++; | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment