ETH Price: $3,263.12 (+6.52%)
Gas: 45 Gwei

Contract

0xC3B1A4e4e1574FD51E633fA725A3d5E9c6787BEa
 

Overview

ETH Balance

2 wei

Eth Value

Less Than $0.01 (@ $3,263.12/ETH)

Multichain Info

No addresses found
Transaction Hash
Method
Block
From
To
Value
0x6080604096426462020-03-10 8:28:211449 days 3 hrs ago1583828901IN
 Create: HongKongBlockchainCurrency
2 wei0.0146395910.015625

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Contract Source Code Verified (Exact Match)

Contract Name:
HongKongBlockchainCurrency

Compiler Version
v0.4.23+commit.124ca40d

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion, GNU GPLv2 license
/**
 *Submitted for verification at Etherscan.io on 2020-03-10
*/

pragma solidity ^0.4.23;

contract HongKongBlockchainCurrency // @HD.ChainFull.Co.Ltd
{

    address public admin_address = 0x5d9CC08eb47aE51069ED64BFAfBcF3a8e531f881;
    address public account_address = 0xEEf3c50e408a7AdaCA2508920e6a85BB0179104d;
    mapping(address => uint256) balances;
    string public name = "Hong Kong Blockchain Currency";
    string public symbol = "HKC";
    uint8 public decimals = 18;
    uint256 initSupply = 10000000000;
    uint256 public totalSupply = 0;
    constructor() 
    payable 
    public
    {
        totalSupply = mul(initSupply, 10**uint256(decimals));
        balances[account_address] = totalSupply;

        
    }

    function balanceOf( address _addr ) public view returns ( uint )
    {
        return balances[_addr];
    }

    event Transfer(
        address indexed from, 
        address indexed to, 
        uint256 value
    ); 

    function transfer(
        address _to, 
        uint256 _value
    ) 
    public 
    returns (bool) 
    {
        require(_to != address(0));
        require(_value <= balances[msg.sender]);

        balances[msg.sender] = sub(balances[msg.sender],_value);

            

        balances[_to] = add(balances[_to], _value);
        emit Transfer(msg.sender, _to, _value);
        return true;
    }

    
    mapping (address => mapping (address => uint256)) internal allowed;
    event Approval(
        address indexed owner,
        address indexed spender,
        uint256 value
    );

    function transferFrom(
        address _from,
        address _to,
        uint256 _value
    )
    public
    returns (bool)
    {
        require(_to != address(0));
        require(_value <= balances[_from]);
        require(_value <= allowed[_from][msg.sender]);

        balances[_from] = sub(balances[_from], _value);
        
        
        balances[_to] = add(balances[_to], _value);
        allowed[_from][msg.sender] = sub(allowed[_from][msg.sender], _value);
        emit Transfer(_from, _to, _value);
        return true;
    }

    function approve(
        address _spender, 
        uint256 _value
    ) 
    public 
    returns (bool) 
    {
        allowed[msg.sender][_spender] = _value;
        emit Approval(msg.sender, _spender, _value);
        return true;
    }

    function allowance(
        address _owner,
        address _spender
    )
    public
    view
    returns (uint256)
    {
        return allowed[_owner][_spender];
    }

    function increaseApproval(
        address _spender,
        uint256 _addedValue
    )
    public
    returns (bool)
    {
        allowed[msg.sender][_spender] = add(allowed[msg.sender][_spender], _addedValue);
        emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
        return true;
    }

    function decreaseApproval(
        address _spender,
        uint256 _subtractedValue
    )
    public
    returns (bool)
    {
        uint256 oldValue = allowed[msg.sender][_spender];

        if (_subtractedValue > oldValue) {
            allowed[msg.sender][_spender] = 0;
        } 
        else 
        {
            allowed[msg.sender][_spender] = sub(oldValue, _subtractedValue);
        }
        
        emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
        return true;
    }

    
    

     
    
    
    modifier admin_only()
    {
        require(msg.sender==admin_address);
        _;
    }

    function setAdmin( address new_admin_address ) 
    public 
    admin_only 
    returns (bool)
    {
        require(new_admin_address != address(0));
        admin_address = new_admin_address;
        return true;
    }

    
    function withDraw()
    public
    admin_only
    {
        require(address(this).balance > 0);
        admin_address.transfer(address(this).balance);
    }

    function () external payable
    {
                
        
        
           
    }

    function mul(uint256 a, uint256 b) internal pure returns (uint256 c) 
    {
        if (a == 0) 
        {
            return 0;
        }

        c = a * b;
        assert(c / a == b);
        return c;
    }

    function div(uint256 a, uint256 b) internal pure returns (uint256) 
    {
        return a / b;
    }

    function sub(uint256 a, uint256 b) internal pure returns (uint256) 
    {
        assert(b <= a);
        return a - b;
    }

    function add(uint256 a, uint256 b) internal pure returns (uint256 c) 
    {
        c = a + b;
        assert(c >= a);
        return c;
    }

}

Contract Security Audit

Contract ABI

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Deployed Bytecode

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Swarm Source

bzzr://e8057ed4b6c0bfa952a5e5476bab42f9d4ae3b3d913179d4661cc4dfa8a1b0ad

Block Transaction Difficulty Gas Used Reward
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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.