Blockwell

Kyber Network Crystal

ERC20

This contract is an ERC20 token.

Name Kyber Network Crystal
Symbol KNC
Decimals 18
Total Supply 210,465,359 KNC

About link description

Kyber Network’s on-chain liquidity protocol allows decentralized token swaps to be integrated into any application, enabling value exchange to be performed seamlessly between all parties in the ecosystem. Tapping on the protocol, developers can build payment flows and financial apps, including instant token swap services, erc20 payments, and innovative financial dapps - helping to build a world where any token is usable anywhere.

Stats

Public Functions 11
Event Types 3
Code Size 7,828 bytes

Approval Event

Parameters help
_owner
address help
_spender
address help
_value
uint help

Burn Event

Parameters help
_burner
address help
_value
uint help

Transfer Event

Parameters help
_from
address help
_to
address help
_value
uint help

Functions Expand All Collapse All

transferOwnership keyboard_arrow_up

Parameters help

Name Type
newOwner
address help

Properties

Visibility help public
Mutability help transaction
Source Code
  function transferOwnership(address newOwner) onlyOwner {
    if (newOwner != address(0)) {
      owner = newOwner;
    }
  }

balanceOf keyboard_arrow_up

Parameters help

Name Type
_owner
address help

Properties

Visibility help public
Mutability help constant
Source Code
  function balanceOf(address _owner) constant returns (uint256 balance) {
    return balances[_owner];
  }

transfer keyboard_arrow_up

Parameters help

Name Type
_to
address help
_value
uint256 help

Properties

Visibility help public
Mutability help transaction
Source Code
  function transfer(address _to, uint256 _value) returns (bool) {
    balances[msg.sender] = balances[msg.sender].sub(_value);
    balances[_to] = balances[_to].add(_value);
    Transfer(msg.sender, _to, _value);
    return true;
  }

allowance keyboard_arrow_up

Parameters help

Name Type
_owner
address help
_spender
address help

Properties

Visibility help public
Mutability help constant
Source Code
  function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
    return allowed[_owner][_spender];
  }

transferFrom keyboard_arrow_up

Parameters help

Name Type
_from
address help
_to
address help
_value
uint256 help

Properties

Visibility help public
Mutability help transaction
Source Code
  function transferFrom(address _from, address _to, uint256 _value) returns (bool) {
    var _allowance = allowed[_from][msg.sender];

    // Check is not needed because sub(_allowance, _value) will already throw if this condition is not met
    // require (_value <= _allowance);

    // KYBER-NOTE! code changed to comply with ERC20 standard
    balances[_from] = balances[_from].sub(_value);
    balances[_to] = balances[_to].add(_value);
    //balances[_from] = balances[_from].sub(_value); // this was removed
    allowed[_from][msg.sender] = _allowance.sub(_value);
    Transfer(_from, _to, _value);
    return true;
  }

approve keyboard_arrow_up

Parameters help

Name Type
_spender
address help
_value
uint256 help

Properties

Visibility help public
Mutability help transaction

Requirements help

One or more of the following:
Source Code
  function approve(address _spender, uint256 _value) returns (bool) {

    // 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
    require((_value == 0) || (allowed[msg.sender][_spender] == 0));

    allowed[msg.sender][_spender] = _value;
    Approval(msg.sender, _spender, _value);
    return true;
  }

transfer keyboard_arrow_up

Parameters help

Name Type
_to
address help
_value
uint help

Properties

Visibility help public
Mutability help transaction
Source Code
    function transfer(address _to, uint _value)
        onlyWhenTransferEnabled
        validDestination(_to)
        returns (bool) {
        return super.transfer(_to, _value);
    }

transferFrom keyboard_arrow_up

Parameters help

Name Type
_from
address help
_to
address help
_value
uint help

Properties

Visibility help public
Mutability help transaction
Source Code
    function transferFrom(address _from, address _to, uint _value)
        onlyWhenTransferEnabled
        validDestination(_to)
        returns (bool) {
        return super.transferFrom(_from, _to, _value);
    }

burn keyboard_arrow_up

Parameters help

Name Type
_value
uint help

Properties

Visibility help public
Mutability help transaction

Modifiers help

onlyWhenTransferEnabled checks for the following:
Source Code
    function burn(uint _value) onlyWhenTransferEnabled
        returns (bool){
        balances[msg.sender] = balances[msg.sender].sub(_value);
        totalSupply = totalSupply.sub(_value);
        Burn(msg.sender, _value);
        Transfer(msg.sender, address(0x0), _value);
        return true;
    }

burnFrom keyboard_arrow_up

Parameters help

Name Type
_from
address help
_value
uint256 help

Properties

Visibility help public
Mutability help transaction

Modifiers help

onlyWhenTransferEnabled checks for the following:

Requirements help

null
Source Code
    function burnFrom(address _from, uint256 _value) onlyWhenTransferEnabled
        returns (bool) {
        assert( transferFrom( _from, msg.sender, _value ) );
        return burn(_value);
    }

emergencyERC20Drain keyboard_arrow_up

Parameters help

Name Type
token
ERC20 help
amount
uint help

Properties

Visibility help public
Mutability help transaction
Source Code
    function emergencyERC20Drain( ERC20 token, uint amount ) onlyOwner {
        token.transfer( owner, amount );
    }