ETH Price: $3,564.17 (+1.67%)
Gas: 38 Gwei

Contract

0x7D0CA0957077510FFb91e443DE43A317E9cd3171
 

Overview

ETH Balance

0.2011 ETH

Eth Value

$716.75 (@ $3,564.17/ETH)

Multichain Info

No addresses found
Transaction Hash
Method
Block
From
To
Value
Claim136134762021-11-14 10:35:06865 days ago1636886106IN
0x7D0CA095...7E9cd3171
0 ETH0.0044827889.3840291
Claim94587932020-02-11 1:51:341507 days ago1581385894IN
0x7D0CA095...7E9cd3171
0 ETH0.000162725
Claim90869652019-12-11 4:48:591569 days ago1576039739IN
0x7D0CA095...7E9cd3171
0 ETH0.000162725
Claim87883002019-10-22 5:03:021619 days ago1571720582IN
0x7D0CA095...7E9cd3171
0 ETH0.000267988
Claim86739122019-10-04 5:56:071637 days ago1570168567IN
0x7D0CA095...7E9cd3171
0 ETH0.0006699620
Claim85884222019-09-20 20:50:061651 days ago1569012606IN
0x7D0CA095...7E9cd3171
0 ETH0.0004574513.65625
Finalize85877372019-09-20 18:08:381651 days ago1569002918IN
0x7D0CA095...7E9cd3171
0 ETH0.0020600319
Finalize85876472019-09-20 17:48:101651 days ago1569001690IN
0x7D0CA095...7E9cd3171
0 ETH0.00086419
Finalize85841642019-09-20 5:02:021651 days ago1568955722IN
0x7D0CA095...7E9cd3171
0 ETH0.0011004724.2
Finalize85778812019-09-19 5:14:281652 days ago1568870068IN
0x7D0CA095...7E9cd3171
0 ETH0.0009458520.8
Finalize85746632019-09-18 17:07:231653 days ago1568826443IN
0x7D0CA095...7E9cd3171
0 ETH0.0009094820
Finalize85746632019-09-18 17:07:231653 days ago1568826443IN
0x7D0CA095...7E9cd3171
0 ETH0.0004547410
Finalize85614382019-09-16 16:00:561655 days ago1568649656IN
0x7D0CA095...7E9cd3171
0 ETH0.0004592810.1
Finalize85523382019-09-15 5:45:271656 days ago1568526327IN
0x7D0CA095...7E9cd3171
0 ETH0.0004592810.1
Finalize85488902019-09-14 16:51:511657 days ago1568479911IN
0x7D0CA095...7E9cd3171
0 ETH0.0005002111
Finalize85411742019-09-13 11:56:021658 days ago1568375762IN
0x7D0CA095...7E9cd3171
0 ETH0.0004547410
Finalize85329042019-09-12 5:03:331659 days ago1568264613IN
0x7D0CA095...7E9cd3171
0 ETH0.0006821115
Finalize85265152019-09-11 5:04:231660 days ago1568178263IN
0x7D0CA095...7E9cd3171
0 ETH0.0004547410
Finalize85248102019-09-10 22:37:561660 days ago1568155076IN
0x7D0CA095...7E9cd3171
0 ETH0.0004547410
Finalize85175932019-09-09 19:33:171662 days ago1568057597IN
0x7D0CA095...7E9cd3171
0 ETH0.000409269
Finalize85074792019-09-08 5:49:251663 days ago1567921765IN
0x7D0CA095...7E9cd3171
0 ETH0.000318317
Finalize85011282019-09-07 5:52:191664 days ago1567835539IN
0x7D0CA095...7E9cd3171
0 ETH0.000181894
Finalize84988272019-09-06 21:32:071665 days ago1567805527IN
0x7D0CA095...7E9cd3171
0 ETH0.000318317
Finalize84988252019-09-06 21:31:351665 days ago1567805495IN
0x7D0CA095...7E9cd3171
0 ETH0.000170483.74899999
Finalize84816592019-09-04 5:11:191667 days ago1567573879IN
0x7D0CA095...7E9cd3171
0 ETH0.000200084.4
View all transactions

Latest 6 internal transactions

Advanced mode:
Parent Txn Hash Block From To Value
136134762021-11-14 10:35:06865 days ago1636886106
0x7D0CA095...7E9cd3171
0.05 ETH
94587932020-02-11 1:51:341507 days ago1581385894
0x7D0CA095...7E9cd3171
0.001 ETH
90869652019-12-11 4:48:591569 days ago1576039739
0x7D0CA095...7E9cd3171
0.0011 ETH
87883002019-10-22 5:03:021619 days ago1571720582
0x7D0CA095...7E9cd3171
0.062 ETH
86739122019-10-04 5:56:071637 days ago1570168567
0x7D0CA095...7E9cd3171
0.1 ETH
85884222019-09-20 20:50:061651 days ago1569012606
0x7D0CA095...7E9cd3171
0.8 ETH
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Contract Source Code Verified (Exact Match)

Contract Name:
CharityChallenge

Compiler Version
v0.5.0+commit.1d4f565a

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion
/**
 *Submitted for verification at Etherscan.io on 2019-03-19
*/

pragma solidity ^0.5.0;

// Market API used to interract with augur, we only need to describe the
// functions we'll be using.
// cf https://github.com/AugurProject/augur-core/blob/master/source/contracts/reporting/IMarket.sol
interface IMarket {
    function isFinalized() external view returns (bool);
    function isInvalid() external view returns (bool);
    function getWinningPayoutNumerator(uint256 _outcome) external view returns (uint256);
    function getEndTime() external view returns (uint256);
}

contract CharityChallenge {

    event Received(address indexed sender, uint256 value);

    event Donated(address indexed npo, uint256 value);

    event Claimed(address indexed claimer, uint256 value);

    event SafetyHatchClaimed(address indexed claimer, uint256 value);

    string public constant VERSION = "0.2.0";

    address payable public contractOwner;

    // key is npo address, value is ratio
    mapping(address => uint8) public npoRatios;

    uint8 sumRatio;

    address payable[] public npoAddresses;

    address public marketAddress;

    IMarket market;

    uint256 public challengeEndTime;

    uint256 public challengeSafetyHatchTime1;

    uint256 public challengeSafetyHatchTime2;

    // Valid outcomes are 'YES', 'NO' and 'INVALID'
    bool public isEventFinalized;

    bool public hasChallengeAccomplished;

    bool private safetyHatchClaimSucceeded;

    mapping(address => uint256) public donorBalances;

    uint256 public donorCount;

    bool private mReentrancyLock = false;
    modifier nonReentrant() {
        require(!mReentrancyLock);
        mReentrancyLock = true;
        _;
        mReentrancyLock = false;
    }

    constructor(
        address payable _contractOwner,
        address payable[] memory _npoAddresses,
        uint8[] memory _ratios,
        address _marketAddress
    ) public
    {
        require(_npoAddresses.length == _ratios.length);
        uint length = _npoAddresses.length;
        for (uint i = 0; i < length; i++) {
            address payable npo = _npoAddresses[i];
            npoAddresses.push(npo);
            require(_ratios[i] > 0, "Ratio must be a positive number");
            npoRatios[npo] = _ratios[i];
            sumRatio += _ratios[i];
        }
        contractOwner = _contractOwner;
        marketAddress = _marketAddress;
        market = IMarket(_marketAddress);
        challengeEndTime = market.getEndTime();
        challengeSafetyHatchTime1 = challengeEndTime + 26 weeks;
        challengeSafetyHatchTime2 = challengeSafetyHatchTime1 + 52 weeks;
        isEventFinalized = false;
        hasChallengeAccomplished = false;
    }

    function() external payable {
        require(now <= challengeEndTime);
        require(msg.value > 0);
        if (donorBalances[msg.sender] == 0 && msg.value > 0) {
            donorCount++;
        }
        donorBalances[msg.sender] += msg.value;
        emit Received(msg.sender, msg.value);
    }

    function balanceOf(address _donorAddress) public view returns (uint256) {
        if (safetyHatchClaimSucceeded) {
            return 0;
        }
        return donorBalances[_donorAddress];
    }

    function finalize() nonReentrant external {
        require(now > challengeEndTime);
        require(now <= challengeSafetyHatchTime1);
        require(!isEventFinalized);
        doFinalize();
    }

    function doFinalize() private {
        bool hasError;
        (hasChallengeAccomplished, hasError) = checkAugur();
        if (!hasError) {
            isEventFinalized = true;
            if (hasChallengeAccomplished) {
                uint256 totalContractBalance = address(this).balance;
                uint length = npoAddresses.length;
                uint256 donatedAmount = 0;
                for (uint i = 0; i < length - 1; i++) {
                    address payable npo = npoAddresses[i];
                    uint8 ratio = npoRatios[npo];
                    uint256 amount = totalContractBalance * ratio / sumRatio;
                    donatedAmount += amount;
                    npo.transfer(amount);
                    emit Donated(npo, amount);
                }
                // Don't want to keep any amount in the contract
                uint256 remainingAmount = totalContractBalance - donatedAmount;
                address payable npo = npoAddresses[length - 1];
                npo.transfer(remainingAmount);
                emit Donated(npo, remainingAmount);
            }
        }
    }

    function getExpectedDonationAmount(address payable _npo) view external returns (uint256) {
        require(npoRatios[_npo] > 0);
        uint256 totalContractBalance = address(this).balance;
        uint8 ratio = npoRatios[_npo];
        uint256 amount = totalContractBalance * ratio / sumRatio;
        return amount;
    }

    function claim() nonReentrant external {
        require(now > challengeEndTime);
        require(isEventFinalized || now > challengeSafetyHatchTime1);
        require(!hasChallengeAccomplished || now > challengeSafetyHatchTime1);
        require(balanceOf(msg.sender) > 0);

        uint256 claimedAmount = balanceOf(msg.sender);
        donorBalances[msg.sender] = 0;
        msg.sender.transfer(claimedAmount);
        emit Claimed(msg.sender, claimedAmount);
    }

    function safetyHatchClaim() external {
        require(now > challengeSafetyHatchTime2);
        require(msg.sender == contractOwner);

        uint totalContractBalance = address(this).balance;
        safetyHatchClaimSucceeded = true;
        contractOwner.transfer(address(this).balance);
        emit SafetyHatchClaimed(contractOwner, totalContractBalance);
    }

    function checkAugur() private view returns (bool happened, bool errored) {
        if (market.isFinalized()) {
            if (market.isInvalid()) {
                // Treat 'invalid' outcome as 'no'
                // because 'invalid' is one of the valid outcomes
                return (false, false);
            } else {
                uint256 no = market.getWinningPayoutNumerator(0);
                uint256 yes = market.getWinningPayoutNumerator(1);
                return (yes > no, false);
            }
        } else {
            return (false, true);
        }
    }
}

Contract Security Audit

Contract ABI

[{"constant":false,"inputs":[],"name":"safetyHatchClaim","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"","type":"uint256"}],"name":"npoAddresses","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"hasChallengeAccomplished","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"finalize","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"claim","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"npoRatios","outputs":[{"name":"","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"_npo","type":"address"}],"name":"getExpectedDonationAmount","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"_donorAddress","type":"address"}],"name":"balanceOf","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"donorBalances","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"challengeSafetyHatchTime1","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"marketAddress","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"isEventFinalized","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"challengeEndTime","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"donorCount","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"contractOwner","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"challengeSafetyHatchTime2","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"VERSION","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"inputs":[{"name":"_contractOwner","type":"address"},{"name":"_npoAddresses","type":"address[]"},{"name":"_ratios","type":"uint8[]"},{"name":"_marketAddress","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"payable":true,"stateMutability":"payable","type":"fallback"},{"anonymous":false,"inputs":[{"indexed":true,"name":"sender","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Received","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"npo","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Donated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"claimer","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Claimed","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"claimer","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"SafetyHatchClaimed","type":"event"}]

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Deployed Bytecode

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1c77c228be4d8ca10fee35d730810029

Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

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

-----Decoded View---------------
Arg [0] : _contractOwner (address): 0x0Ed8C3d25849fe3fe918A8863A04E71036cbc501
Arg [1] : _npoAddresses (address[]): 0x3990a27b2dA3612727dD3A9cf877C94465C32776
Arg [2] : _ratios (uint8[]): 1
Arg [3] : _marketAddress (address): 0xC247A41E8508B48C1e34609EedD077D60E75CbB1

-----Encoded View---------------
8 Constructor Arguments found :
Arg [0] : 0000000000000000000000000ed8c3d25849fe3fe918a8863a04e71036cbc501
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000080
Arg [2] : 00000000000000000000000000000000000000000000000000000000000000c0
Arg [3] : 000000000000000000000000c247a41e8508b48c1e34609eedd077d60e75cbb1
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000001
Arg [5] : 0000000000000000000000003990a27b2da3612727dd3a9cf877c94465c32776
Arg [6] : 0000000000000000000000000000000000000000000000000000000000000001
Arg [7] : 0000000000000000000000000000000000000000000000000000000000000001


Swarm Source

bzzr://050e5b8bd5a4916b7c52251da2941121d8ce1c77c228be4d8ca10fee35d73081

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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.