Contract

Contract Source Code (Solidity)

IDE

• Blockscan IDE
• 🤖 Code ReaderBeta
• Remix IDE

Outline

•  contract SafeMath
•    - function safeMul(uint256 a, uint256 b ...
•    - function safeDiv(uint256 a, uint256 b ...
•    - function safeSub(uint256 a, uint256 b ...
•    - function safeAdd(uint256 a, uint256 b ...
•  contract VNT is SafeMath *
•    - function VNT()
•    - function transfer(address _to, uint25 ...
•    - function approve(address _spender, ui ...
•    - function transferFrom(address _from, ...
•    - function totalSupply()
•    - function balanceOf(address _owner)
•    - function allowance(address _owner, ad ...
•    - function()
•    - function editRestrictedAddress(addres ...
•    - function isRestrictedAddress(address ...

More Options

• Similar
• Sol2Uml
• Submit Audit
• Compare

/**
 *Submitted for verification at Etherscan.io on 2018-03-14
*/

pragma solidity ^0.4.8;

/**
 * @title VNT Token - The Next Generation Value Transfering Network.
 * @author Wang Yunxiao - <[email protected]>
 */

contract SafeMath {
    function safeMul(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a * b;
        assert(a == 0 || c / a == b);
        return c;
    }

    function safeDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        assert(b > 0);
        uint256 c = a / b;
        assert(a == b * c + a % b);
        return c;
    }

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

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

contract VNT is SafeMath {
    string constant tokenName = 'VNTChain';
    string constant tokenSymbol = 'VNT';
    uint8 constant decimalUnits = 8;

    string public name;
    string public symbol;
    uint8 public decimals;

    uint256 public totalSupply = 100 * (10**8) * (10**8); // 100 yi

    address public owner;
    
    mapping(address => bool) restrictedAddresses;
    mapping(address => uint256) public balanceOf;
    mapping(address => mapping(address => uint256)) public allowance;

    /* This generates a public event on the blockchain that will notify clients */
    event Transfer(address indexed from, address indexed to, uint256 value);

    event Approval(address indexed _owner, address indexed _spender, uint256 _value);

    modifier onlyOwner {
        assert(owner == msg.sender);
        _;
    }

    /* Initializes contract with initial supply tokens to the creator of the contract */
    function VNT() public {
        balanceOf[msg.sender] = totalSupply;                // Give the creator all tokens
        name = tokenName;                                   // Set the name for display purposes
        symbol = tokenSymbol;                               // Set the symbol for display purposes
        decimals = decimalUnits;                            // Amount of decimals for display purposes
        owner = msg.sender;
    }

    function transfer(address _to, uint256 _value) public returns (bool success) {
        require(_value > 0);
        require(balanceOf[msg.sender] >= _value);              // Check if the sender has enough
        require(balanceOf[_to] + _value >= balanceOf[_to]);    // Check for overflows
        require(!restrictedAddresses[msg.sender]);
        require(!restrictedAddresses[_to]);
        balanceOf[msg.sender] = SafeMath.safeSub(balanceOf[msg.sender], _value);   // Subtract from the sender
        balanceOf[_to] = SafeMath.safeAdd(balanceOf[_to], _value);                 // Add the same to the recipient
        Transfer(msg.sender, _to, _value);                  // Notify anyone listening that this transfer took place
        return true;
    }

    function approve(address _spender, uint256 _value) public returns (bool success) {
        allowance[msg.sender][_spender] = _value;            // Set allowance
        Approval(msg.sender, _spender, _value);              // Raise Approval event
        return true;
    }

    function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
        require(balanceOf[_from] >= _value);                  // Check if the sender has enough
        require(balanceOf[_to] + _value >= balanceOf[_to]);   // Check for overflows
        require(_value <= allowance[_from][msg.sender]);      // Check allowance
        require(!restrictedAddresses[_from]);
        require(!restrictedAddresses[msg.sender]);
        require(!restrictedAddresses[_to]);
        balanceOf[_from] = SafeMath.safeSub(balanceOf[_from], _value);    // Subtract from the sender
        balanceOf[_to] = SafeMath.safeAdd(balanceOf[_to], _value);        // Add the same to the recipient
        allowance[_from][msg.sender] = SafeMath.safeSub(allowance[_from][msg.sender], _value);
        Transfer(_from, _to, _value);
        return true;
    }

    function totalSupply() constant public returns (uint256 Supply) {
        return totalSupply;
    }

    function balanceOf(address _owner) constant public returns (uint256 balance) {
        return balanceOf[_owner];
    }

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

    function() public payable {
        revert();
    }

    /* Owner can add new restricted address or removes one */
    function editRestrictedAddress(address _newRestrictedAddress) public onlyOwner {
        restrictedAddresses[_newRestrictedAddress] = !restrictedAddresses[_newRestrictedAddress];
    }

    function isRestrictedAddress(address _querryAddress) constant public returns (bool answer) {
        return restrictedAddresses[_querryAddress];
    }
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"constant":true,"inputs":[{"name":"_querryAddress","type":"address"}],"name":"isRestrictedAddress","outputs":[{"name":"answer","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_value","type":"uint256"}],"name":"approve","outputs":[{"name":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"Supply","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transferFrom","outputs":[{"name":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_newRestrictedAddress","type":"address"}],"name":"editRestrictedAddress","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"}],"name":"balanceOf","outputs":[{"name":"balance","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transfer","outputs":[{"name":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"},{"name":"_spender","type":"address"}],"name":"allowance","outputs":[{"name":"remaining","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"payable":true,"stateMutability":"payable","type":"fallback"},{"anonymous":false,"inputs":[{"indexed":true,"name":"from","type":"address"},{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_owner","type":"address"},{"indexed":true,"name":"_spender","type":"address"},{"indexed":false,"name":"_value","type":"uint256"}],"name":"Approval","type":"event"}]

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

bzzr://3a08a95f508ada77fcc0be2ca871e028876eab742376b32d12eab761fa49497b