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solidity// SPDX-License-Identifier: MITpragma solidity 0.8.27;contract K - Pastebin.com
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- solidity
- // SPDX-License-Identifier: MIT
- pragma solidity 0.8.27;
- contract KonohaFund {
- address public owner;
- uint public goal;
- uint public deadline;
- uint public totalRaised;
- bool public goalReached;
- bool public campaignEnded;
- mapping(address => uint) public contributions;
- event FundContributed(address contributor, uint amount);
- event FundRefunded(address contributor, uint amount);
- event CampaignEnded(address owner, bool goalReached);
- constructor(uint _time, uint _goal) {
- owner = msg.sender;
- goal = _goal;
- deadline = block.timestamp + _time;
- }
- modifier onlyOwner() {
- require(msg.sender == owner, "only owner can call this function");
- _;
- }
- function contribute() public payable {
- require(!campaignEnded, "Campaign has ended");
- require(msg.value > 0, "Send more than 0 eth");
- uint checkRaise = totalRaised + msg.value;
- require(checkRaise <= goal, "amount more than remaining goal");
- totalRaised += msg.value;
- contributions[msg.sender] += msg.value;
- if (totalRaised == goal) {
- goalReached = true;
- campaignEnded = true;
- emit CampaignEnded(owner, true);
- }
- emit FundContributed(msg.sender, msg.value);
- }
- function withdraw() public onlyOwner {
- require(campaignEnded, "Campaign has not ended");
- require(goalReached, "Goal not yet reached");
- uint amount = address(this).balance;
- payable(owner).transfer(amount);
- }
- function refund() public {
- require(campaignEnded && !goalReached, "Campaign has not ended or goal met");
- require(contributions[msg.sender] > 0, "No contributions to refund");
- uint refundAmount = contributions[msg.sender];
- contributions[msg.sender] = 0;
- payable(msg.sender).transfer(refundAmount);
- emit FundRefunded(msg.sender, refundAmount);
- }
- function timeLeft() public view returns (uint) {
- if (block.timestamp >= deadline) {
- return 0;
- } else {
- return deadline - block.timestamp;
- }
- }
- function checkRemainingGoal() public view returns (uint) {
- if (totalRaised == goal) {
- return 0;
- } else {
- return goal - totalRaised;
- }
- }
- }
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