Contract 0xEE6BD04C6164D7F0Fa1cb03277C855639D99A7F6 1

 
 
Txn Hash
Method
Block
From
To
Value
0x2bb4cd3d6bb1efff8f298bcb8e5647d3212be84890ff643d32fb6f56f4714304Request Daily Ac...75286702019-04-08 16:51:011330 days 5 hrs ago0x550191dd58ad1d7bc97905aa5456bf764dae2ad9 IN  MCH: Daily Action0 Ether0.000071822
0x68b0d3161c146f4a8874f3464374543abdfb3ef0326e2da407e9ed11170079d6Request Daily Ac...75174252019-04-06 23:08:481331 days 23 hrs ago0x0718450731af2c4544b6e5d3f6d4615dfca58eea IN  MCH: Daily Action0 Ether00.00002664
0x19dd8d2ca34ee3b740133b6ebdf3557b30129bcfcd0c9d3ccf840959e06e4ad4Request Daily Ac...75170462019-04-06 21:45:391332 days 39 mins ago0xfba6b678d1697d6baaef564d7403cc889da48ac8 IN  MCH: Daily Action0 Ether00.00002771
0xa0905db1955053f075cddb01b1ad3b15055a25cf0be6fee4fd586abdc6c7054bRequest Daily Ac...75170242019-04-06 21:41:531332 days 43 mins ago0x4876c2aca3a9bbb78e4acb6d23f1287dfa87dd1b IN  MCH: Daily Action0 Ether00.0000525
0x68437cc6c6f23fafcbc73c13cf31a26902a2b625d54d9b7e52814452442c8e4cRequest Daily Ac...75168072019-04-06 20:49:531332 days 1 hr ago0xc3a7e5c87f3100eb48fd731c90f9fc93bbab0de1 IN  MCH: Daily Action0 Ether00.00005327
0xfd27aacb1cec9ddc7913fc27718b780763077dda72b69f39a807fb891e6c7199Request Daily Ac...75165432019-04-06 19:51:521332 days 2 hrs ago0x6a6d45d74c2287b031fae6d0a078b951ebc5e838 IN  MCH: Daily Action0 Ether00.00016629
0x169b62ec15a00d6063b191d256565b5601dd0ccb39ebed5a4efc6528e4b6c0b3Request Daily Ac...75165432019-04-06 19:51:521332 days 2 hrs ago0x7d32c5d7b11d97123c783ed1c9f3d8696bb0b0b9 IN  MCH: Daily Action0 Ether00.00016629
0x10a64f54bd56772ee496e7adc7007283634c8b5228e6f3cfda769ba94c878478Request Daily Ac...75164582019-04-06 19:34:291332 days 2 hrs ago0x75495bd8a8d63d1b355213602b29bb7718bb943b IN  MCH: Daily Action0 Ether0.000000040.00059127
0xf90ef9a7596efce0f6ce5bed55b9b15c674b65df1d5128c585260180dd2ad6feRequest Daily Ac...75159562019-04-06 17:40:151332 days 4 hrs ago0x4c350d7b95f15b61f3cca31c5305abc34d499cbe IN  MCH: Daily Action0 Ether0.000000180.00241435
0x498f15bbda20a0093454aff4bdba6b41576457448f5f6b78e7b2adc8932f3ac8Request Daily Ac...75158142019-04-06 17:10:441332 days 5 hrs ago0x58980fc3695e347b56a988ed08b883c3a3b352c7 IN  MCH: Daily Action0 Ether0.000000140.00296457
0x9082e4b7d68079b6c6b3636b4c30ec8fdc6232f3e1777bf8f85b99b7016c157bRequest Daily Ac...75155692019-04-06 16:15:391332 days 6 hrs ago0x34870a1532183df2466f83effdbc3a60aa48bb38 IN  MCH: Daily Action0 Ether0.000000470.01
0x002de0798493d3dc6b4429e6dd76163707447037748f561494ac5bcd178d53bcRequest Daily Ac...75155252019-04-06 16:06:111332 days 6 hrs ago0xcb5324f5a84098c1dbc74d4fbfb0068bb51bd2a8 IN  MCH: Daily Action0 Ether0.000000760.01000545
0x5a333bd4752a7240b880bf1717dee1b5b0116a507231c9b8003cecd422319d98Request Daily Ac...75155212019-04-06 16:05:091332 days 6 hrs ago0xd7a259224049fa650e7354f2e6121ae35bc1ae87 IN  MCH: Daily Action0 Ether0.000000780.01022963
0x72c1e70f99f2b018e27024b16b9e8186162ede17b93dbd028613960f3065fc0aRequest Daily Ac...75143622019-04-06 11:42:581332 days 10 hrs ago0xbf5f6ad59490665bb4e34aea28dcc20490ef7a1b IN  MCH: Daily Action0 Ether0.000000970.0126138
0x1b7e5d8a12c6e7c7b509ad9eecbd42eb55175e9e7eb7b5018ea18eff1100a6fbRequest Daily Ac...75142952019-04-06 11:28:051332 days 10 hrs ago0x7ac59b45109b6ae44e2a818146625e9016f08b95 IN  MCH: Daily Action0 Ether0.000001070.014
0xde3cdd70e768d30f753516b59b4c0b76c3eb79ba37ab09a4f196db645df34c27Request Daily Ac...75111422019-04-05 23:48:061332 days 22 hrs ago0xc267dcfaa0460814a446a3ca2f99e167cce1ff46 IN  MCH: Daily Action0 Ether0.000001540.02
0x941e7ee8eb07078f7e40c426e9bbbd0516c952ce7a6dc84be71e44b3c215d14bRequest Daily Ac...75111422019-04-05 23:48:061332 days 22 hrs ago0x76b345de44feb915b9e3fc7a4fdd7c88acbbacba IN  MCH: Daily Action0 Ether0.000001010.021
0x3747757796c034a7eb43138bb1e13a29aaefa6535c24cdda72ad20971fe57655Request Daily Ac...74917032019-04-02 22:42:111335 days 23 hrs ago0x16285479babd4586c001e19bbba8fa4e1e6bef7f IN  MCH: Daily Action0 Ether0.000004760.062
0x724d20ea3584e70c22f588494c706ee50e9037bd1eec54244d26a0786dd45566Request Daily Ac...74890002019-04-02 12:48:001336 days 9 hrs ago0x45f817f153c07f13efff6ef8676c7389e4399d41 IN  MCH: Daily Action0 Ether00.00003996
0xeebda91eb5079676b90e7d7591f92a85c6e7d01286966ca39066274ef9717fc3Request Daily Ac...74577212019-03-28 15:06:221341 days 7 hrs ago0x83ede976b381b0c544dcbab66462cf94feb0ccf7 IN  MCH: Daily Action0 Ether0.00000420.087
0x26fbb6a2a9b09f9f03c3097e5b662ec5a3e8ddfedfd9ddebddfcc28b79027495Request Daily Ac...74322542019-03-24 15:40:061345 days 6 hrs ago0xeb31d8765996cf0d76b88da7bea517013e847c8e IN  MCH: Daily Action0 Ether0.000002940.061
0x07e81a7edb789404a306b1dccf319ce8145cf6534382f4464462eb471f342371Request Daily Ac...73836702019-03-17 1:54:501352 days 20 hrs ago0xedd96fc082cfad93422187709dced84decf6f116 IN  MCH: Daily Action0 Ether0.000001280.02658317
0x87ddc304aa404a6710cd17b346e737e2442e3833589dc156396036461e16d68aRequest Daily Ac...73664322019-03-14 9:49:241355 days 12 hrs ago0x7b629ef4c9ebabc72a7a1c64667d38ae5e571750 IN  MCH: Daily Action0 Ether0.000008310.108
0x2b3612e6a349fed6fca733d7412972dde016ac3ae994241e482dadb5ade71c4eRequest Daily Ac...73659832019-03-14 8:08:541355 days 14 hrs ago0xede31b73e29c92da24b0e9119a97c95fe858b990 IN  MCH: Daily Action0 Ether0.000013650.17738193
0xac5c83a4e4f04773993c6d94a39ea87d7719f9635636331ce4cbb267800a2f4fRequest Daily Ac...73651522019-03-14 4:57:221355 days 17 hrs ago0x21b3d133e0f0050a6c4614bf1d46f4b25c482c87 IN  MCH: Daily Action0 Ether0.000014010.18210452
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Contract Source Code Verified (Exact Match)

Contract Name:
DailyAction

Compiler Version
v0.5.2+commit.1df8f40c

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion

Contract Source Code (Solidity)

/**
 *Submitted for verification at Etherscan.io on 2019-01-11
*/

pragma solidity 0.5.2;

// File: ../mch-dailyaction/contracts/lib/github.com/OpenZeppelin/openzeppelin-solidity-2.1.1/contracts/cryptography/ECDSA.sol

/**
 * @title Elliptic curve signature operations
 * @dev Based on https://gist.github.com/axic/5b33912c6f61ae6fd96d6c4a47afde6d
 * TODO Remove this library once solidity supports passing a signature to ecrecover.
 * See https://github.com/ethereum/solidity/issues/864
 */

library ECDSA {
    /**
     * @dev Recover signer address from a message by using their signature
     * @param hash bytes32 message, the hash is the signed message. What is recovered is the signer address.
     * @param signature bytes signature, the signature is generated using web3.eth.sign()
     */
    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
        bytes32 r;
        bytes32 s;
        uint8 v;

        // Check the signature length
        if (signature.length != 65) {
            return (address(0));
        }

        // Divide the signature in r, s and v variables
        // ecrecover takes the signature parameters, and the only way to get them
        // currently is to use assembly.
        // solhint-disable-next-line no-inline-assembly
        assembly {
            r := mload(add(signature, 0x20))
            s := mload(add(signature, 0x40))
            v := byte(0, mload(add(signature, 0x60)))
        }

        // Version of signature should be 27 or 28, but 0 and 1 are also possible versions
        if (v < 27) {
            v += 27;
        }

        // If the version is correct return the signer address
        if (v != 27 && v != 28) {
            return (address(0));
        } else {
            return ecrecover(hash, v, r, s);
        }
    }

    /**
     * toEthSignedMessageHash
     * @dev prefix a bytes32 value with "\x19Ethereum Signed Message:"
     * and hash the result
     */
    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
        // 32 is the length in bytes of hash,
        // enforced by the type signature above
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
    }
}

// File: ../mch-dailyaction/contracts/lib/github.com/OpenZeppelin/openzeppelin-solidity-2.1.1/contracts/ownership/Ownable.sol

/**
 * @title Ownable
 * @dev The Ownable contract has an owner address, and provides basic authorization control
 * functions, this simplifies the implementation of "user permissions".
 */
contract Ownable {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev The Ownable constructor sets the original `owner` of the contract to the sender
     * account.
     */
    constructor () internal {
        _owner = msg.sender;
        emit OwnershipTransferred(address(0), _owner);
    }

    /**
     * @return the address of the owner.
     */
    function owner() public view returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(isOwner());
        _;
    }

    /**
     * @return true if `msg.sender` is the owner of the contract.
     */
    function isOwner() public view returns (bool) {
        return msg.sender == _owner;
    }

    /**
     * @dev Allows the current owner to relinquish control of the contract.
     * @notice Renouncing to ownership will leave the contract without an owner.
     * It will not be possible to call the functions with the `onlyOwner`
     * modifier anymore.
     */
    function renounceOwnership() public onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    /**
     * @dev Allows the current owner to transfer control of the contract to a newOwner.
     * @param newOwner The address to transfer ownership to.
     */
    function transferOwnership(address newOwner) public onlyOwner {
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers control of the contract to a newOwner.
     * @param newOwner The address to transfer ownership to.
     */
    function _transferOwnership(address newOwner) internal {
        require(newOwner != address(0));
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

// File: ../mch-dailyaction/contracts/lib/github.com/OpenZeppelin/openzeppelin-solidity-2.1.1/contracts/access/Roles.sol

/**
 * @title Roles
 * @dev Library for managing addresses assigned to a Role.
 */
library Roles {
    struct Role {
        mapping (address => bool) bearer;
    }

    /**
     * @dev give an account access to this role
     */
    function add(Role storage role, address account) internal {
        require(account != address(0));
        require(!has(role, account));

        role.bearer[account] = true;
    }

    /**
     * @dev remove an account's access to this role
     */
    function remove(Role storage role, address account) internal {
        require(account != address(0));
        require(has(role, account));

        role.bearer[account] = false;
    }

    /**
     * @dev check if an account has this role
     * @return bool
     */
    function has(Role storage role, address account) internal view returns (bool) {
        require(account != address(0));
        return role.bearer[account];
    }
}

// File: ../mch-dailyaction/contracts/lib/github.com/OpenZeppelin/openzeppelin-solidity-2.1.1/contracts/access/roles/PauserRole.sol

contract PauserRole {
    using Roles for Roles.Role;

    event PauserAdded(address indexed account);
    event PauserRemoved(address indexed account);

    Roles.Role private _pausers;

    constructor () internal {
        _addPauser(msg.sender);
    }

    modifier onlyPauser() {
        require(isPauser(msg.sender));
        _;
    }

    function isPauser(address account) public view returns (bool) {
        return _pausers.has(account);
    }

    function addPauser(address account) public onlyPauser {
        _addPauser(account);
    }

    function renouncePauser() public {
        _removePauser(msg.sender);
    }

    function _addPauser(address account) internal {
        _pausers.add(account);
        emit PauserAdded(account);
    }

    function _removePauser(address account) internal {
        _pausers.remove(account);
        emit PauserRemoved(account);
    }
}

// File: ../mch-dailyaction/contracts/lib/github.com/OpenZeppelin/openzeppelin-solidity-2.1.1/contracts/lifecycle/Pausable.sol

/**
 * @title Pausable
 * @dev Base contract which allows children to implement an emergency stop mechanism.
 */
contract Pausable is PauserRole {
    event Paused(address account);
    event Unpaused(address account);

    bool private _paused;

    constructor () internal {
        _paused = false;
    }

    /**
     * @return true if the contract is paused, false otherwise.
     */
    function paused() public view returns (bool) {
        return _paused;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     */
    modifier whenNotPaused() {
        require(!_paused);
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     */
    modifier whenPaused() {
        require(_paused);
        _;
    }

    /**
     * @dev called by the owner to pause, triggers stopped state
     */
    function pause() public onlyPauser whenNotPaused {
        _paused = true;
        emit Paused(msg.sender);
    }

    /**
     * @dev called by the owner to unpause, returns to normal state
     */
    function unpause() public onlyPauser whenPaused {
        _paused = false;
        emit Unpaused(msg.sender);
    }
}

// File: ../mch-dailyaction/contracts/lib/github.com/OpenZeppelin/openzeppelin-solidity-2.1.1/contracts/math/SafeMath.sol

/**
 * @title SafeMath
 * @dev Unsigned math operations with safety checks that revert on error
 */
library SafeMath {
    /**
    * @dev Multiplies two unsigned integers, reverts on overflow.
    */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b);

        return c;
    }

    /**
    * @dev Integer division of two unsigned integers truncating the quotient, reverts on division by zero.
    */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        require(b > 0);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
    * @dev Subtracts two unsigned integers, reverts on overflow (i.e. if subtrahend is greater than minuend).
    */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b <= a);
        uint256 c = a - b;

        return c;
    }

    /**
    * @dev Adds two unsigned integers, reverts on overflow.
    */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a);

        return c;
    }

    /**
    * @dev Divides two unsigned integers and returns the remainder (unsigned integer modulo),
    * reverts when dividing by zero.
    */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b != 0);
        return a % b;
    }
}

// File: ../mch-dailyaction/contracts/DailyAction.sol

contract DailyAction is Ownable, Pausable {
    using SafeMath for uint256;

    uint256 public term;
    address public validater;
    mapping(address => mapping(address => uint256)) public counter;
    mapping(address => uint256) public latestActionTime;

    event Action(
        address indexed user,
        address indexed referrer,
        uint256 at
    );
    
    constructor() public {
        term = 86400 - 600;
    }
    
    function withdrawEther() external onlyOwner() {
        msg.sender.transfer(address(this).balance);
    }

    function setValidater(address _varidater) external onlyOwner() {
        validater = _varidater;
    }

    function updateTerm(uint256 _term) external onlyOwner() {
        term = _term;
    }

    function requestDailyActionReward(bytes calldata _signature, address _referrer) external whenNotPaused() {
        require(!isInTerm(msg.sender), "this sender got daily reward within term");
        uint256 count = getCount(msg.sender);
        require(validateSig(_signature, count), "invalid signature");
        emit Action(
            msg.sender,
            _referrer,
            block.timestamp
        );
        setCount(msg.sender, count + 1);
        latestActionTime[msg.sender] = block.timestamp;
    }

    function isInTerm(address _sender) public view returns (bool) {
        if (latestActionTime[_sender] == 0) {
            return false;
        } else if (block.timestamp >= latestActionTime[_sender].add(term)) {
            return false;
        }
        return true;
    }

    function getCount(address _sender) public view returns (uint256) {
        if (counter[validater][_sender] == 0) {
            return 1;
        }
        return counter[validater][_sender];
    }

    function setCount(address _sender, uint256 _count) private {
        counter[validater][_sender] = _count;
    }

    function validateSig(bytes memory _signature, uint256 _count) private view returns (bool) {
        require(validater != address(0));
        uint256 hash = uint256(msg.sender) * _count;
        address signer = ECDSA.recover(ECDSA.toEthSignedMessageHash(bytes32(hash)), _signature);
        return (signer == validater);
    }

    /* function getAddress(bytes32 hash, bytes memory signature) public pure returns (address) { */
    /*     return ECDSA.recover(ECDSA.toEthSignedMessageHash(hash), signature); */
    /* } */

}

Contract Security Audit

Contract ABI

[{"constant":false,"inputs":[{"name":"_term","type":"uint256"}],"name":"updateTerm","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"unpause","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"account","type":"address"}],"name":"isPauser","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"_sender","type":"address"}],"name":"getCount","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"paused","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"renouncePauser","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"renounceOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"withdrawEther","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"account","type":"address"}],"name":"addPauser","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"pause","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_signature","type":"bytes"},{"name":"_referrer","type":"address"}],"name":"requestDailyActionReward","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"isOwner","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"_sender","type":"address"}],"name":"isInTerm","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"term","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_varidater","type":"address"}],"name":"setValidater","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"},{"name":"","type":"address"}],"name":"counter","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"validater","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"latestActionTime","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"name":"user","type":"address"},{"indexed":true,"name":"referrer","type":"address"},{"indexed":false,"name":"at","type":"uint256"}],"name":"Action","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"account","type":"address"}],"name":"Paused","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"account","type":"address"}],"name":"Unpaused","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"account","type":"address"}],"name":"PauserAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"account","type":"address"}],"name":"PauserRemoved","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"previousOwner","type":"address"},{"indexed":true,"name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"}]

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Swarm Source

bzzr://a8a326e32b5a004f5a813857dd589137d2541c053ba2f55367293c51962228e4
Block Transaction Difficulty Gas Used Reward
Block Uncle Number Difficulty Gas Used Reward
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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.