LoopringCoin V2

0xbbbbca6a901c926f240b89eacb641d8aec7aeafd Copy

ERC20

This contract is an ERC20 token.

Name LoopringCoin V2

Symbol LRC

Decimals 18

Total Supply 1,374,513,897 LRC

About

Loopring (LRC) is a cryptocurrency and operates on the Ethereum platform. Loopring has a current supply of 1,373,873,440.4424574 with 1,225,574,299.5158994 in circulation. The last known price of Loopring is 0.21676507 USD and is down -3.54 over the last 24 hours. It is currently trading on 107 active market(s) with $22,840,676.80 traded over the last 24 hours. More information can be found at https://loopring.org.

Stats

Public Functions 13

Event Types 3

Code Size 10,276 bytes

Library Use

Uses SafeMath for uint256.

Events (3)

Approval Event

Parameters

owner	address
spender	address
value	uint256

Burn Event

Parameters

burner	address
value	uint256

Transfer Event

Parameters

from	address
to	address
value	uint256

Constants (1)

MAX_UINT Constant

uint

UNKNOWN VALUE - 1

State Variables (7)

name Variable

string

symbol Variable

string

decimals Variable

uint8

allowed Variable

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

Internal Variable

balances Variable

mapping(address => uint256)

Internal Variable

totalSupply_ Variable

uint256

Internal Variable

burnedTotalNum_ Variable

uint256

Internal Variable

Functions Expand All Collapse All

totalSupply

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

function totalSupply() public view returns (uint256) {
  return totalSupply_;
}

balanceOf

Parameters

Name	Type
_owner	address

Properties

Visibility public

Mutability view

Source Code

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

transfer

Parameters

Name	Type
_to	address
_value	uint256

Properties

Visibility public

Mutability transaction

Requirements

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

Source Code

function transfer(address _to, uint256 _value) public returns (bool) {
  // if _to is address(0), invoke burn function.
  if (_to == address(0)) {
    return burn(_value);
  }

  require(_value <= balances[msg.sender]);
  // SafeMath.sub will throw if there is not enough balance.
  balances[msg.sender] = balances[msg.sender].sub(_value);
  balances[_to] = balances[_to].add(_value);
  emit Transfer(msg.sender, _to, _value);
  return true;
}

totalBurned

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

function totalBurned() public view returns (uint256) {
  return burnedTotalNum_;
}

burn

Parameters

Name	Type
_value	uint256

Properties

Visibility public

Mutability transaction

Requirements

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

Source Code

function burn(uint256 _value) public returns (bool) {
  require(_value <= balances[msg.sender]);

  address burner = msg.sender;
  balances[burner] = balances[burner].sub(_value);
  totalSupply_ = totalSupply_.sub(_value);
  burnedTotalNum_ = burnedTotalNum_.add(_value);

  emit Burn(burner, _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

Requirements

_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 returns (bool) {
  if (_to == address(0)) {
    return burnFrom(_from, _value);
  }

  require(_value <= balances[_from]);
  require(_value <= allowed[_from][msg.sender]);
  balances[_from] = balances[_from].sub(_value);
  balances[_to] = balances[_to].add(_value);

  /// an allowance of MAX_UINT represents an unlimited allowance.
  /// @dev see https://github.com/ethereum/EIPs/issues/717
  if (allowed[_from][msg.sender] < MAX_UINT) {
    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) {
  allowed[msg.sender][_spender] = _value;
  emit Approval(msg.sender, _spender, _value);
  return true;
}

burnFrom

Parameters

Name	Type
_owner	address
_value	uint256

Properties

Visibility public

Mutability transaction

Requirements

_owner must not be equal to UNKNOWN VALUE

_value must be less than or equal to balances for _owner

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

Source Code

function burnFrom(address _owner, uint256 _value) public returns (bool) {
  require(_owner != address(0));
  require(_value <= balances[_owner]);
  require(_value <= allowed[_owner][msg.sender]);

  balances[_owner] = balances[_owner].sub(_value);
  if (allowed[_owner][msg.sender] < MAX_UINT) {
    allowed[_owner][msg.sender] = allowed[_owner][msg.sender].sub(_value);
  }
  totalSupply_ = totalSupply_.sub(_value);
  burnedTotalNum_ = burnedTotalNum_.add(_value);

  emit Burn(_owner, _value);
  return true;
}

increaseApproval

Parameters

Name	Type
_spender	address
_addedValue	uint

Properties

Visibility public

Mutability transaction

Source Code

function increaseApproval(address _spender, uint256 _addedValue)
  public
  returns (bool)
{
  allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(
    _addedValue
  );
  emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
  return true;
}

decreaseApproval

Parameters

Name	Type
_spender	address
_subtractedValue	uint

Properties

Visibility public

Mutability transaction

Source Code

function decreaseApproval(address _spender, uint256 _subtractedValue)
  public
  returns (bool)
{
  uint256 oldValue = allowed[msg.sender][_spender];
  if (_subtractedValue > oldValue) {
    allowed[msg.sender][_spender] = 0;
  } else {
    allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
  }
  emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
  return true;
}

batchTransfer

Parameters

Name	Type
accounts	address[]
amounts	uint256[]

Properties

Visibility public

Mutability transaction

Requirements

the number of values in accounts must be equal to the number of values in amounts

Source Code

function batchTransfer(address[] calldata accounts, uint256[] calldata amounts)
  external
  returns (bool)
{
  require(accounts.length == amounts.length);
  for (uint256 i = 0; i < accounts.length; i++) {
    require(transfer(accounts[i], amounts[i]), "transfer failed");
  }
  return true;
}

constructor

Parameters

This function has no parameters.

Properties

Visibility public

Mutability payable

Source Code

function() external 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.

LoopringCoin V2

ERC20

About link description

Stats

Library Use

Events (3) 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.

Transfer Event

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

Constants (1) keyboard_arrow_up

MAX_UINT Constant

State Variables (7) keyboard_arrow_up

name Variable

symbol Variable

decimals Variable

allowed Variable

balances Variable

totalSupply_ Variable

burnedTotalNum_ Variable

Functions Expand All Collapse All

totalSupply 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

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

totalBurned 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

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

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

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

increaseApproval 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

decreaseApproval 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

batchTransfer 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

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

About

Events (3)

Parameters

Parameters

Parameters

Constants (1)

State Variables (7)

totalSupply

Parameters

balanceOf

Parameters

transfer

Parameters

Requirements

totalBurned

Parameters

burn

Parameters

Requirements

allowance

Parameters

transferFrom

Parameters

Requirements

approve

Parameters

burnFrom

Parameters

Requirements

increaseApproval

Parameters

decreaseApproval

Parameters

batchTransfer

Parameters

Requirements

constructor

Parameters