Address Contract Partially Verified
Address
0x5Cf04716BA20127F1E2297AdDCf4B5035000c9eb
Balance
0 ETH
Nonce
1
Code Size
4571 bytes
Creator
0x71eB2C89...fd10 at tx 0x1304e981...1063bd
Indexed Transactions
3 (24,429,222 → 24,429,279)
Gas Used (indexed)
118,671
Contract Bytecode
4571 bytes
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Verified Source Code Partial Match
Compiler: v0.4.25+commit.59dbf8f1
EVM: byzantium
Optimization: No
NKNToken.sol 175 lines
pragma solidity ^0.4.24;
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b > 0);
uint256 c = a / b;
return c;
}
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) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 {
uint256 public totalSupply;
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
function allowance(address owner, address spender) public view returns (uint256);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
contract Owned {
address public owner;
event OwnershipTransferred(address indexed _from, address indexed _to);
constructor() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _owner) onlyOwner public {
require(_owner != address(0));
owner = _owner;
emit OwnershipTransferred(owner, _owner);
}
}
contract ERC20Token is ERC20, Owned {
using SafeMath for uint256;
mapping(address => uint256) balances;
mapping(address => mapping (address => uint256)) allowed;
// True if transfers are allowed
bool public transferable = false;
modifier canTransfer() {
require(transferable == true);
_;
}
function setTransferable(bool _transferable) onlyOwner public {
transferable = _transferable;
}
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) canTransfer public returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
}
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _value uint256 the amount of tokens to be transferred
*/
function transferFrom(address _from, address _to, uint256 _value) canTransfer public returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
}
// Allow `_spender` to withdraw from your account, multiple times.
function approve(address _spender, uint _value) public returns (bool success) {
// To change the approve amount you first have to reduce the addresses`
// allowance to zero by calling `approve(_spender, 0)` if it is not
// already 0 to mitigate the race condition described here:
// https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
if ((_value != 0) && (allowed[msg.sender][_spender] != 0)) {
revert();
}
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) public view returns (uint256) {
return allowed[_owner][_spender];
}
function () public payable {
revert();
}
}
contract NKNToken is ERC20Token{
string public name = "NKN";
string public symbol = "NKN";
uint8 public decimals = 18;
uint256 public totalSupplyCap = 7 * 10**8 * 10**uint256(decimals);
constructor(address _issuer) public {
totalSupply = totalSupplyCap;
balances[_issuer] = totalSupplyCap;
emit Transfer(address(0), _issuer, totalSupplyCap);
}
}
Read Contract
allowance 0xdd62ed3e → uint256
balanceOf 0x70a08231 → uint256
decimals 0x313ce567 → uint8
name 0x06fdde03 → string
owner 0x8da5cb5b → address
symbol 0x95d89b41 → string
totalSupply 0x18160ddd → uint256
totalSupplyCap 0xbb102aea → uint256
transferable 0x92ff0d31 → bool
Write Contract 5 functions
These functions modify contract state and require a wallet transaction to execute.
approve 0x095ea7b3
address _spender
uint256 _value
returns: bool
setTransferable 0x9cd23707
bool _transferable
transfer 0xa9059cbb
address _to
uint256 _value
returns: bool
transferFrom 0x23b872dd
address _from
address _to
uint256 _value
returns: bool
transferOwnership 0xf2fde38b
address _owner
Top Interactions
| Address | Txns | Sent | Received |
|---|---|---|---|
| 0x21a31Ee1...5549 | 1 | 1 | |
| 0xb4Ed0ba7...9177 | 1 | 1 | |
| 0xDDCd71B4...43D9 | 1 | 1 |
Token Balances (2)
View Transfers →Recent Transactions
|
| Hash | Block | Age | From/To | Value | |
|---|---|---|---|---|---|
| 0x937a7082...394ee4 | 24,429,279 | IN | 0x21a31Ee1...5549 | 0 ETH | |
| 0x819f5197...59dd02 | 24,429,245 | IN | 0xb4Ed0ba7...9177 | 0 ETH | |
| 0x3eae1fd9...43bd65 | 24,429,222 | IN | 0xDDCd71B4...43D9 | 0 ETH |