Contract

0x2f979C933AEF4fCDdD27C0Fa5C54d8a780555b0a

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NEST Protocol: Mining Pool

Source Code

NEST Protocol

Mining

Overview

ETH Balance

0 ETH

Eth Value

$0.00

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ContractCreator

Fake_Phishing462873 at txn 0x1c960106b16edf8d757221e7d7f6ce502534cf66b86e30cc762316e3871bd585

Multichain Info

$0 (Multichain Portfolio)

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Latest 1 from a total of 1 transactions

	Transaction Hash	Method	Block		From		To
	0x56c8ab13112c22e6690ff3f3a0305d4e8247f1bca98473c05ee12830a6132a39	Change Mapping	10469605	2020-07-16 8:54:45	1656 days ago	1594889685	Fake_Phishing462873	IN	NEST Protocol: Mining Pool	0 ETH$0.00	0.00231522	55

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Contract Source Code Verified (Exact Match)

Contract Name:

Nest_3_MiningContract

Compiler Version

v0.6.0+commit.26b70077

Optimization Enabled:

Yes with 200 runs

Other Settings:

default evmVersion, GNU GPLv3 license

Contract Source Code (Solidity)

IDE

/**
 *Submitted for verification at Etherscan.io on 2020-07-28
*/

pragma solidity 0.6.0;

/**
 * @title Mining contract
 * @dev Mining pool + mining logic
 */
contract Nest_3_MiningContract {
    
    using address_make_payable for address;
    using SafeMath for uint256;
    
    uint256 _blockAttenuation = 2400000;                 //  Block decay time interval
    uint256[10] _attenuationAmount;                      //  Mining decay amount
    uint256 _afterMiningAmount = 40 ether;               //  Stable period mining amount
    uint256 _firstBlockNum;                              //  Starting mining block
    uint256 _latestMining;                               //  Latest offering block
    Nest_3_VoteFactory _voteFactory;                     //  Voting contract
    ERC20 _nestContract;                                 //  NEST contract address
    address _offerFactoryAddress;                        //  Offering contract address
    
    // Current block, current block mining amount
    event OreDrawingLog(uint256 nowBlock, uint256 blockAmount);
    
    /**
    * @dev Initialization method
    * @param voteFactory  voting contract address
    */
    constructor(address voteFactory) public {
        _voteFactory = Nest_3_VoteFactory(address(voteFactory));                  
        _offerFactoryAddress = address(_voteFactory.checkAddress("nest.v3.offerMain"));
        _nestContract = ERC20(address(_voteFactory.checkAddress("nest")));
        // Initiate mining parameters
        _firstBlockNum = 6236588;
        _latestMining = block.number;
        uint256 blockAmount = 400 ether;
        for (uint256 i = 0; i < 10; i ++) {
            _attenuationAmount[i] = blockAmount;
            blockAmount = blockAmount.mul(8).div(10);
        }
    }
    
    /**
    * @dev Reset voting contract
    * @param voteFactory Voting contract address
    */
    function changeMapping(address voteFactory) public onlyOwner {
        _voteFactory = Nest_3_VoteFactory(address(voteFactory));                  
        _offerFactoryAddress = address(_voteFactory.checkAddress("nest.v3.offerMain"));
        _nestContract = ERC20(address(_voteFactory.checkAddress("nest")));
    }
    
    /**
    * @dev Offering mining
    * @return Current block mining amount
    */
    function oreDrawing() public returns (uint256) {
        require(address(msg.sender) == _offerFactoryAddress, "No authority");
        //  Update mining amount list
        uint256 miningAmount = changeBlockAmountList();
        //  Transfer NEST
        if (_nestContract.balanceOf(address(this)) < miningAmount){
            miningAmount = _nestContract.balanceOf(address(this));
        }
        if (miningAmount > 0) {
            _nestContract.transfer(address(msg.sender), miningAmount);
            emit OreDrawingLog(block.number,miningAmount);
        }
        return miningAmount;
    }
    
    /**
    * @dev Update mining amount list
    */
    function changeBlockAmountList() private returns (uint256) {
        uint256 createBlock = _firstBlockNum;
        uint256 recentlyUsedBlock = _latestMining;
        uint256 attenuationPointNow = block.number.sub(createBlock).div(_blockAttenuation);
        uint256 miningAmount = 0;
        uint256 attenuation;
        if (attenuationPointNow > 9) {
            attenuation = _afterMiningAmount;
        } else {
            attenuation = _attenuationAmount[attenuationPointNow];
        }
        miningAmount = attenuation.mul(block.number.sub(recentlyUsedBlock));
        _latestMining = block.number;
        return miningAmount;
    }
    
    /**
    * @dev Transfer all NEST
    * @param target Transfer target address
    */
    function takeOutNest(address target) public onlyOwner {
        _nestContract.transfer(address(target),_nestContract.balanceOf(address(this)));
    }

    // Check block decay time interval
    function checkBlockAttenuation() public view returns(uint256) {
        return _blockAttenuation;
    }
    
    // Check latest offering block
    function checkLatestMining() public view returns(uint256) {
        return _latestMining;
    }
    
    // Check mining amount decay
    function checkAttenuationAmount(uint256 num) public view returns(uint256) {
        return _attenuationAmount[num];
    }
    
    // Check NEST balance
    function checkNestBalance() public view returns(uint256) {
        return _nestContract.balanceOf(address(this));
    }
    
    // Modify block decay time interval
    function changeBlockAttenuation(uint256 blockNum) public onlyOwner {
        require(blockNum > 0);
        _blockAttenuation = blockNum;
    }
    
    // Modify mining amount decay
    function changeAttenuationAmount(uint256 firstAmount, uint256 top, uint256 bottom) public onlyOwner {
        uint256 blockAmount = firstAmount;
        for (uint256 i = 0; i < 10; i ++) {
            _attenuationAmount[i] = blockAmount;
            blockAmount = blockAmount.mul(top).div(bottom);
        }
    }
    
    // Administrator only
    modifier onlyOwner(){
        require(_voteFactory.checkOwners(msg.sender), "No authority");
        _;
    }
}

// Voting contract
interface Nest_3_VoteFactory {
    // Check address
	function checkAddress(string calldata name) external view returns (address contractAddress);
	// Check whether administrator
	function checkOwners(address man) external view returns (bool);
}

// EC20
interface ERC20 {
    function totalSupply() external view returns (uint256);
    function balanceOf(address account) external view returns (uint256);
    function transfer(address recipient, uint256 amount) external returns (bool);
    function allowance(address owner, address spender) external view returns (uint256);
    function approve(address spender, uint256 amount) external returns (bool);
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

library SafeMath {
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }
        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        uint256 c = a / b;
        return c;
    }
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

library address_make_payable {
   function make_payable(address x) internal pure returns (address payable) {
      return address(uint160(x));
   }
}

Contract Security Audit

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Contract ABI

[{"inputs":[{"internalType":"address","name":"voteFactory","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"nowBlock","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"blockAmount","type":"uint256"}],"name":"OreDrawingLog","type":"event"},{"inputs":[{"internalType":"uint256","name":"firstAmount","type":"uint256"},{"internalType":"uint256","name":"top","type":"uint256"},{"internalType":"uint256","name":"bottom","type":"uint256"}],"name":"changeAttenuationAmount","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"blockNum","type":"uint256"}],"name":"changeBlockAttenuation","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"voteFactory","type":"address"}],"name":"changeMapping","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"num","type":"uint256"}],"name":"checkAttenuationAmount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"checkBlockAttenuation","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"checkLatestMining","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"checkNestBalance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"oreDrawing","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"target","type":"address"}],"name":"takeOutNest","outputs":[],"stateMutability":"nonpayable","type":"function"}]

Contract Creation Code

Decompile Bytecode Switch to Opcodes View

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Deployed Bytecode

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

000000000000000000000000a628845c523975493da88ac3641a803e92fa5d54

-----Decoded View---------------
Arg [0] : voteFactory (address): 0xa628845c523975493DA88Ac3641a803E92fa5d54

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000a628845c523975493da88ac3641a803e92fa5d54

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Swarm Source

ipfs://28edb0240734441bf8d3bdef66077bf3438b43888baca7fd03161274ede913cf

Block		Transaction	Difficulty	Gas Used	Reward

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Block		Uncle Number	Difficulty	Gas Used	Reward

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OVERVIEW

NEST Token mining pool V3.

Validator Index	Block		Amount

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Transaction Hash	Block		Value	Eth2 PubKey	Valid

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Multichain Portfolio | 30 Chains

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Last updated: less than 1 sec ago

Chain	Token	Portfolio %	Price	Amount	Value

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.

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