QunQunCommunities

0x264dc2dedcdcbb897561a57cba5085ca416fb7b4 Copy

ERC20

This contract is an ERC20 token.

Name QunQunCommunities

Symbol QUN

Decimals 18

Total Supply 1,557,000,000 QUN

About

QunQun (QUN) is a cryptocurrency and operates on the Ethereum platform. QunQun has a current supply of 1,557,000,000 with 729,777,775.1057 in circulation. The last known price of QunQun is 0.00557158 USD and is up 4.96 over the last 24 hours. It is currently trading on 7 active market(s) with $481,484.77 traded over the last 24 hours. More information can be found at https://qunqun.io/.

Identical Contracts

The following contracts have identical source code.

QunQunTokenIssue - 0x079aa54221e88e7cfaea5de72f3326fe0f08aef4

Stats

Public Functions 9

Event Types 4

Code Size 9,671 bytes

Events (4)

Approval Event

Parameters

_owner	address
_spender	address
_value	uint256

Burn Event

Parameters

from	address
value	uint256

Issue Event

Parameters

amount

uint256

Transfer Event

Parameters

from	address
to	address
value	uint256

State Variables (8)

name Variable

string

symbol Variable

string

decimals Variable

uint8

totalSupply Variable

uint256

issueContractAddress Variable

address

owner Variable

address

balanceOf Variable

mapping(address => uint256)

allowance Variable

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

Internal Variable

Functions Expand All Collapse All

issue

Parameters

Name	Type
amount	uint256

Properties

Visibility public

Mutability transaction

Requirements

issueContractAddress must be equal to the sender's address

Source Code

function issue(uint256 amount) public {
  require(msg.sender == issueContractAddress);
  balanceOf[owner] = SafeMath.add(balanceOf[owner], amount);
  totalSupply = SafeMath.add(totalSupply, amount);
  Issue(amount);
}

balanceOf

Parameters

Name	Type
_owner	address

Properties

Visibility public

Mutability view

Source Code

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

transfer

Parameters

Name	Type
_to	address
_value	uint256

Properties

Visibility public

Mutability transaction

Requirements

_to must not be equal to 0x0

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

balanceOf for _to + _value must be greater than balanceOf for _to

previousBalances must be equal to balanceOf for the sender's address + balanceOf for _to

Source Code

function transfer(address _to, uint256 _value) public returns (bool success) {
  _transfer(msg.sender, _to, _value);
  return true;
}

transferFrom

Parameters

Name	Type
_from	address
_to	address
_value	uint256

Properties

Visibility public

Mutability transaction

Requirements

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

_to must not be equal to 0x0

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

balanceOf for _to + _value must be greater than balanceOf for _to

previousBalances must be equal to balanceOf for the sender's address + balanceOf for _to

Source Code

function transferFrom(
  address _from,
  address _to,
  uint256 _value
) public returns (bool success) {
  require(_value <= allowance[_from][msg.sender]);
  // Check allowance
  allowance[_from][msg.sender] -= _value;
  _transfer(_from, _to, _value);
  return true;
}

approve

Parameters

Name	Type
_spender	address
_value	uint256

Properties

Visibility public

Mutability transaction

Requirements

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

Source Code

function approve(address _spender, uint256 _value)
  public
  returns (bool success)
{
  require(_value <= balanceOf[msg.sender]);
  allowance[msg.sender][_spender] = _value;
  Approval(msg.sender, _spender, _value);
  return true;
}

approveAndCall

Parameters

Name	Type
_spender	address
_value	uint256
_extraData	bytes

Properties

Visibility public

Mutability transaction

Source Code

function approveAndCall(
  address _spender,
  uint256 _value,
  bytes _extraData
) public returns (bool success) {
  tokenRecipient spender = tokenRecipient(_spender);
  if (approve(_spender, _value)) {
    spender.receiveApproval(msg.sender, _value, this, _extraData);
    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 remaining)
{
  return allowance[_owner][_spender];
}

burn

Parameters

Name	Type
_value	uint256

Properties

Visibility public

Mutability transaction

Requirements

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

Source Code

function burn(uint256 _value) public returns (bool success) {
  require(balanceOf[msg.sender] >= _value);
  // Check if the sender has enough
  balanceOf[msg.sender] -= _value;
  // Subtract from the sender
  totalSupply -= _value;
  // Updates totalSupply
  Burn(msg.sender, _value);
  return true;
}

burnFrom

Parameters

Name	Type
_from	address
_value	uint256

Properties

Visibility public

Mutability transaction

Requirements

_value must be less than or equal to balanceOf for _from

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

Source Code

function burnFrom(address _from, uint256 _value) public returns (bool success) {
  require(balanceOf[_from] >= _value);
  // Check if the targeted balance is enough
  require(_value <= allowance[_from][msg.sender]);
  // Check allowance
  balanceOf[_from] -= _value;
  // Subtract from the targeted balance
  allowance[_from][msg.sender] -= _value;
  // Subtract from the sender's allowance
  totalSupply -= _value;
  // Update totalSupply
  Burn(_from, _value);
  return true;
}

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.

internal QunQunToken._transfer

Parameters

Name	Type
_from	address
_to	address
_value	uint

Properties

Visibility internal

Mutability transaction

Requirements

_to must not be equal to 0x0

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

balanceOf for _to + _value must be greater than balanceOf for _to

previousBalances must be equal to balanceOf for the sender's address + balanceOf for _to

Source Code

function _transfer(
  address _from,
  address _to,
  uint256 _value
) internal {
  // Prevent transfer to 0x0 address. Use burn() instead
  require(_to != 0x0);
  // Check if the sender has enough
  require(balanceOf[_from] >= _value);
  // Check for overflows
  require(balanceOf[_to] + _value > balanceOf[_to]);
  // Save this for an assertion in the future
  uint256 previousBalances = balanceOf[_from] + balanceOf[_to];
  // Subtract from the sender
  balanceOf[_from] -= _value;
  // Add the same to the recipient
  balanceOf[_to] += _value;
  Transfer(_from, _to, _value);
  // Asserts are used to use static analysis to find bugs in your code. They should never fail
  assert(balanceOf[_from] + balanceOf[_to] == previousBalances);
}

QunQunCommunities

ERC20

About link description

Identical Contracts

Stats

Events (4) keyboard_arrow_up

Approval Event

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

Burn Event

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

Issue 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 (8) keyboard_arrow_up

name Variable

symbol Variable

decimals Variable

totalSupply Variable

issueContractAddress Variable

owner Variable

balanceOf Variable

allowance Variable

Functions Expand All Collapse All

issue keyboard_arrow_up

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

Properties

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

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

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

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

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

approveAndCall 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

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

burn keyboard_arrow_up

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

Properties

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

burnFrom keyboard_arrow_up

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

Properties

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

Internal Functions Expand All Collapse All

internal QunQunToken._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

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

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About

Events (4)

Parameters

Parameters

Parameters

Parameters

State Variables (8)

issue

Parameters

Requirements

balanceOf

Parameters

transfer

Parameters

Requirements

transferFrom

Parameters

Requirements

approve

Parameters

Requirements

approveAndCall

Parameters

allowance

Parameters

burn

Parameters

Requirements

burnFrom

Parameters

Requirements

internal QunQunToken._transfer

Parameters

Requirements