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0xCecA6B8eF05bb98D99E40cd080eddda47850b72c
 

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Block
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Distribute And L...194671012024-03-19 6:46:23716 days ago1710830783IN
0xCecA6B8e...47850b72c
0 ETH0.0034410325.72082383
Distribute And L...192062752024-02-11 17:22:35752 days ago1707672155IN
0xCecA6B8e...47850b72c
0 ETH0.0058793529.22626209
Distribute And L...191800302024-02-08 0:58:35756 days ago1707353915IN
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0 ETH0.004725535.30867525
Distribute And L...190983792024-01-27 14:01:47768 days ago1706364107IN
0xCecA6B8e...47850b72c
0 ETH0.0018292713.67172896
Distribute And L...190177322024-01-16 6:42:59779 days ago1705387379IN
0xCecA6B8e...47850b72c
0 ETH0.0040174619.97077306
Transfer Owner S...190034062024-01-14 6:42:23781 days ago1705214543IN
0xCecA6B8e...47850b72c
0 ETH0.0018605466.38865481
Distribute And L...189382132024-01-05 2:48:47790 days ago1704422927IN
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0 ETH0.0033547925.06682198
Distribute And L...189055152023-12-31 12:39:11795 days ago1704026351IN
0xCecA6B8e...47850b72c
0 ETH0.0019087616.35724925
Distribute And L...189048162023-12-31 10:18:11795 days ago1704017891IN
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0 ETH0.0022560916.85512124
Distribute And L...188805062023-12-28 0:19:59798 days ago1703722799IN
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0 ETH0.0032576224.34479798
Distribute And L...188786612023-12-27 18:04:59798 days ago1703700299IN
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0 ETH0.0054821540.965394
Distribute And L...188669702023-12-26 2:43:47800 days ago1703558627IN
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0 ETH0.0018692216.01380021
Distribute And L...188650882023-12-25 20:22:59800 days ago1703535779IN
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0 ETH0.0021501718.41751502
Distribute And L...188570212023-12-24 17:10:11801 days ago1703437811IN
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0 ETH0.0031443923.50004215
Distribute And L...187011062023-12-02 20:28:11823 days ago1701548891IN
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0 ETH0.0052664639.35722364
Distribute And L...186886142023-12-01 2:34:23825 days ago1701398063IN
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0 ETH0.0042149131.50632197
Distribute And L...186829612023-11-30 7:33:35826 days ago1701329615IN
0xCecA6B8e...47850b72c
0 ETH0.004059630.34126744
Distribute And L...180658342023-09-04 21:34:47912 days ago1693863287IN
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0 ETH0.0032075823.97263967
Distribute And L...179561512023-08-20 13:07:35928 days ago1692536855IN
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0 ETH0.0025405318.98159096
Distribute And L...179235552023-08-15 23:35:59932 days ago1692142559IN
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0 ETH0.003241124.22136416
Distribute And L...176354132023-07-06 14:32:11972 days ago1688653931IN
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0 ETH0.0057558243.02710404
Distribute And L...175693472023-06-27 7:52:11982 days ago1687852331IN
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0 ETH0.0020177415.07402754
Distribute And L...171482112023-04-29 0:32:351041 days ago1682728355IN
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0 ETH0.0075378337.46720283
Distribute And L...170332822023-04-12 17:04:471057 days ago1681319087IN
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0 ETH0.0038314428.63261676
Distribute And L...169882772023-04-06 7:56:471064 days ago1680767807IN
0xCecA6B8e...47850b72c
0 ETH0.005690928.28919655
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Latest 25 internal transactions (View All)

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Parent Transaction Hash Method Block
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Transfer194671012024-03-19 6:46:23716 days ago1710830783
0xCecA6B8e...47850b72c
0 ETH
Lock192062752024-02-11 17:22:35752 days ago1707672155
0xCecA6B8e...47850b72c
0 ETH
Transfer191800302024-02-08 0:58:35756 days ago1707353915
0xCecA6B8e...47850b72c
0 ETH
Transfer190983792024-01-27 14:01:47768 days ago1706364107
0xCecA6B8e...47850b72c
0 ETH
Lock190177322024-01-16 6:42:59779 days ago1705387379
0xCecA6B8e...47850b72c
0 ETH
Transfer189382132024-01-05 2:48:47790 days ago1704422927
0xCecA6B8e...47850b72c
0 ETH
Transfer189055152023-12-31 12:39:11795 days ago1704026351
0xCecA6B8e...47850b72c
0 ETH
Transfer189048162023-12-31 10:18:11795 days ago1704017891
0xCecA6B8e...47850b72c
0 ETH
Transfer188805062023-12-28 0:19:59798 days ago1703722799
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0 ETH
Transfer188786612023-12-27 18:04:59798 days ago1703700299
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0 ETH
Transfer188669702023-12-26 2:43:47800 days ago1703558627
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0 ETH
Transfer188650882023-12-25 20:22:59800 days ago1703535779
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0 ETH
Transfer188570212023-12-24 17:10:11801 days ago1703437811
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Transfer187011062023-12-02 20:28:11823 days ago1701548891
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Transfer186886142023-12-01 2:34:23825 days ago1701398063
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Transfer186829612023-11-30 7:33:35826 days ago1701329615
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0 ETH
Transfer180658342023-09-04 21:34:47912 days ago1693863287
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0 ETH
Transfer179561512023-08-20 13:07:35928 days ago1692536855
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0 ETH
Transfer179235552023-08-15 23:35:59932 days ago1692142559
0xCecA6B8e...47850b72c
0 ETH
Transfer176354132023-07-06 14:32:11972 days ago1688653931
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0 ETH
Transfer175693472023-06-27 7:52:11982 days ago1687852331
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0 ETH
Lock171482112023-04-29 0:32:351041 days ago1682728355
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0 ETH
Transfer170332822023-04-12 17:04:471057 days ago1681319087
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0 ETH
Lock169882772023-04-06 7:56:471064 days ago1680767807
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0 ETH
Lock168782142023-03-21 19:54:591079 days ago1679428499
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0 ETH
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Similar Match Source Code
This contract matches the deployed Bytecode of the Source Code for Contract 0x0ED46439...8F642815D
The constructor portion of the code might be different and could alter the actual behaviour of the contract

Contract Name:
InstanceClaim

Compiler Version
v0.5.17+commit.d19bba13

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, None license

Contract Source Code (Solidity)

/**
 *Submitted for verification at Etherscan.io on 2021-09-17
*/

pragma solidity ^0.5.12;


/**
 * @dev These functions deal with verification of Merkle trees (hash trees),
 */
library MerkleProof {
    /**
     * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
     * defined by `root`. For this, a `proof` must be provided, containing
     * sibling hashes on the branch from the leaf to the root of the tree. Each
     * pair of leaves and each pair of pre-images are assumed to be sorted.
     */
    function verify(bytes32[] memory proof, bytes32 root, bytes32 leaf) internal pure returns (bool) {
        bytes32 computedHash = leaf;

        for (uint256 i = 0; i < proof.length; i++) {
            bytes32 proofElement = proof[i];

            if (computedHash <= proofElement) {
                // Hash(current computed hash + current element of the proof)
                computedHash = keccak256(abi.encodePacked(computedHash, proofElement));
            } else {
                // Hash(current element of the proof + current computed hash)
                computedHash = keccak256(abi.encodePacked(proofElement, computedHash));
            }
        }

        // Check if the computed hash (root) is equal to the provided root
        return computedHash == root;
    }
}

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     *
     * _Available since v2.4.0._
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     * - Multiplication cannot 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-contracts/pull/522
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     *
     * _Available since v2.4.0._
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     *
     * _Available since v2.4.0._
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

//TODO add safemath
interface IDPR {
    function transferFrom(address _spender, address _to, uint256 _amount) external returns(bool);
    function transfer(address _to, uint256 _amount) external returns(bool);
    function balanceOf(address _owner) external view returns(uint256);
    function approve(address _spender, uint256 _amount) external returns(bool);
}

interface ILockingContract {
    function lock(address _addr, uint256 _amount) external;
}

contract InstanceClaim {
    using SafeMath for uint256;

    bytes32 public root;
    IDPR public dpr;
    //system info
    address public owner;
    ILockingContract new_locking_contract;
    mapping(bytes32=>bool) public claimMap;
    mapping(address=>bool) public userMap;
    //=====events=======
    event distribute(address _addr, uint256 _amount);
    event OwnerTransfer(address _newOwner);

    //====modifiers====
    modifier onlyOwner(){
        require(owner == msg.sender);
        _;
    }

    constructor(address _token) public{
        dpr = IDPR(_token);
        owner = msg.sender;
    }

    function transferOwnerShip(address _newOwner) onlyOwner external {
        require(_newOwner != address(0), "MerkleClaim: Wrong owner");
        owner = _newOwner;
        emit OwnerTransfer(_newOwner);
    }

    function setRoot(bytes32 _root) external onlyOwner{
        root = _root;
    }

    function setClaim(bytes32 node) private {
        claimMap[node] = true;
    }


    function setLockContract(ILockingContract lockContract) external onlyOwner{
        require(address(lockContract) != address(0), "DPRBridge: Zero address");
        dpr.approve(address(lockContract), uint256(-1));
        new_locking_contract = lockContract;
    }
    function distributeAndLock(uint256 _amount, bytes32[]  memory proof, bool need_move) public{
        require(!userMap[msg.sender], "MerkleClaim: Account is already claimed");
        bytes32 node = keccak256(abi.encodePacked(msg.sender, _amount));
        require(!claimMap[node], "MerkleClaim: Account is already claimed");
        require(MerkleProof.verify(proof, root, node), "MerkleClaim: Verify failed");
        //update status
        setClaim(node);
        // uint256 half_amount = _amount.div(2);
        // choose the choice
        if(need_move){
            new_locking_contract.lock(msg.sender, _amount);
        }else{
            dpr.transfer(msg.sender, _amount);
        }
        //lockTokens(_addr, _amount.sub(half_amount));
        userMap[msg.sender] = true;
        emit distribute(msg.sender, _amount);
    }

    function withdraw(address _to) external onlyOwner{
        require(dpr.transfer(_to, dpr.balanceOf(address(this))), "MerkleClaim: Transfer Failed");
    }

    function pullTokens(uint256 _amount) external{
        require(dpr.transferFrom(msg.sender, address(this), _amount), "MerkleClaim: TransferFrom failed");
    }
}

Contract Security Audit

Contract ABI

API
[{"inputs":[{"internalType":"address","name":"_token","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"_newOwner","type":"address"}],"name":"OwnerTransfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"_addr","type":"address"},{"indexed":false,"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"distribute","type":"event"},{"constant":true,"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"name":"claimMap","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"},{"internalType":"bytes32[]","name":"proof","type":"bytes32[]"},{"internalType":"bool","name":"need_move","type":"bool"}],"name":"distributeAndLock","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"dpr","outputs":[{"internalType":"contract IDPR","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"pullTokens","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"root","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"contract ILockingContract","name":"lockContract","type":"address"}],"name":"setLockContract","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes32","name":"_root","type":"bytes32"}],"name":"setRoot","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"_newOwner","type":"address"}],"name":"transferOwnerShip","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"userMap","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"_to","type":"address"}],"name":"withdraw","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"}]

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Swarm Source

bzzr://a4da1f3bf2e8177a8d5cdb4ae65c0549a97db12d5d3cff488ce9c10d358b3991

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.