NKN

0x5cf04716ba20127f1e2297addcf4b5035000c9eb Copy

ERC20

This contract is an ERC20 token.

Name NKN

Symbol NKN

Decimals 18

Total Supply 700,000,000 NKN

About

Stats

Public Functions 9

Event Types 3

Code Size 5,235 bytes

Events (3)

Approval Event

Parameters

owner	address
spender	address
value	uint256

OwnershipTransferred Event

Parameters

_from	address
_to	address

Transfer Event

Parameters

from	address
to	address
value	uint256

State Variables (9)

name Variable

string

symbol Variable

string

decimals Variable

uint8

totalSupplyCap Variable

uint256

transferable Variable

bool

totalSupply Variable

uint256

owner Variable

address

balances Variable

mapping(address => uint256)

Internal Variable

allowed Variable

mapping(address => mapping(address => uint256))

Internal Variable

Functions Expand All Collapse All

transferOwnership

Parameters

Name	Type
_owner	address

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

owner must be equal to the sender's address

Requirements

_owner must not be equal to UNKNOWN VALUE

Source Code

function transferOwnership(address _owner) public onlyOwner {
  require(_owner != address(0));
  owner = _owner;

  emit OwnershipTransferred(owner, _owner);
}

balanceOf

Parameters

Name	Type
_owner	address

Properties

Visibility public

Mutability view

Source Code

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

transfer

Parameters

Name	Type
_to	address
_value	uint256

Properties

Visibility public

Mutability transaction

Modifiers

canTransfer checks for the following:

transferable must be equal to true

Requirements

_to must not be equal to UNKNOWN VALUE

_value must be less than or equal to balances for the sender's address

Source Code

function transfer(address _to, uint256 _value)
  public
  canTransfer
  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;
}

allowance

Parameters

Name	Type
_owner	address
_spender	address

Properties

Visibility public

Mutability view

Source Code

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

transferFrom

Parameters

Name	Type
_from	address
_to	address
_value	uint256

Properties

Visibility public

Mutability transaction

Modifiers

canTransfer checks for the following:

transferable must be equal to true

Requirements

_to must not be equal to UNKNOWN VALUE

_value must be less than or equal to balances for _from

_value must be less than or equal to allowed for _from for the sender's address

Source Code

function transferFrom(
  address _from,
  address _to,
  uint256 _value
) public canTransfer 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;
}

approve

Parameters

Name	Type
spender	address
value	uint256

Properties

Visibility public

Mutability transaction

Source Code

function approve(address spender, uint256 value) public returns (bool);

setTransferable

Parameters

Name	Type
_transferable	bool

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

owner must be equal to the sender's address

Source Code

function setTransferable(bool _transferable) public onlyOwner {
  transferable = _transferable;
}

approve

Parameters

Name	Type
_spender	address
_value	uint

Properties

Visibility public

Mutability transaction

Source Code

function approve(address _spender, uint256 _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;
}

constructor

Parameters

This function has no parameters.

Properties

Visibility public

Mutability payable

Source Code

function() public payable {
  revert();
}

Internal Functions Expand All Collapse All

Internal functions are parts of the contract that can't be used directly, but instead are used by the public functions listed above.

NKN

ERC20

About

Stats

Events (3) keyboard_arrow_up

Approval Event

Parameters help Event parameters list the data that an event contains.

OwnershipTransferred Event

Parameters help Event parameters list the data that an event contains.

Transfer Event

Parameters help Event parameters list the data that an event contains.

State Variables (9) keyboard_arrow_up

name Variable

symbol Variable

decimals Variable

totalSupplyCap Variable

transferable Variable

totalSupply Variable

owner Variable

balances Variable

allowed Variable

Functions Expand All Collapse All

transferOwnership keyboard_arrow_up

Parameters help Function parameters list what input the function expects from the user. Each parameter must be given a value.

Properties

Modifiers help Modifiers are additions to a function that typically make various checks before the function is run.

onlyOwner checks for the following:

Requirements help Requirements are checks that the function makes when it runs, and give you insight on what conditions are required for the function to succeed.

Source Code

balanceOf keyboard_arrow_up

Parameters help Function parameters list what input the function expects from the user. Each parameter must be given a value.

Properties

Source Code

transfer keyboard_arrow_up

Parameters help Function parameters list what input the function expects from the user. Each parameter must be given a value.

Properties

Modifiers help Modifiers are additions to a function that typically make various checks before the function is run.

canTransfer checks for the following:

Requirements help Requirements are checks that the function makes when it runs, and give you insight on what conditions are required for the function to succeed.

Source Code

allowance keyboard_arrow_up

Parameters help Function parameters list what input the function expects from the user. Each parameter must be given a value.

Properties

Source Code

transferFrom keyboard_arrow_up

Parameters help Function parameters list what input the function expects from the user. Each parameter must be given a value.

Properties

Modifiers help Modifiers are additions to a function that typically make various checks before the function is run.

canTransfer checks for the following:

Requirements help Requirements are checks that the function makes when it runs, and give you insight on what conditions are required for the function to succeed.

Source Code

approve keyboard_arrow_up

Parameters help Function parameters list what input the function expects from the user. Each parameter must be given a value.

Properties

Source Code

setTransferable keyboard_arrow_up

Parameters help Function parameters list what input the function expects from the user. Each parameter must be given a value.

Properties

Modifiers help Modifiers are additions to a function that typically make various checks before the function is run.

onlyOwner checks for the following:

Source Code

approve keyboard_arrow_up

Parameters help Function parameters list what input the function expects from the user. Each parameter must be given a value.

Properties

Source Code

constructor keyboard_arrow_up

Parameters help Function parameters list what input the function expects from the user. Each parameter must be given a value.

Properties

Source Code

Internal Functions Expand All Collapse All

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Events (3)

Parameters

Parameters

Parameters

State Variables (9)

transferOwnership

Parameters

Modifiers

Requirements

balanceOf

Parameters

transfer

Parameters

Modifiers

Requirements

allowance

Parameters

transferFrom

Parameters

Modifiers

Requirements

approve

Parameters

setTransferable

Parameters

Modifiers

approve

Parameters

constructor

Parameters