Levolution.io Token

0x09970aec766b6f3223aca9111555e99dc50ff13a Copy

ERC20

This contract is an ERC20 token.

Name Levolution.io Token

Symbol LEVL

Decimals 18

Total Supply 311,000,000 LEVL

About

Levolution (LEVL) is a cryptocurrency and operates on the Ethereum platform. Levolution has a current supply of 311,000,000 with 97,672,740.8369212 in circulation. The last known price of Levolution is 0.09907973 USD and is down -0.89 over the last 24 hours. It is currently trading on 4 active market(s) with $164,378.46 traded over the last 24 hours. More information can be found at https://levolution.io/.

Stats

Public Functions 29

Event Types 8

Code Size 24,633 bytes

Library Use

Uses ECDSA for bytes32.

Uses SafeMath for uint256.

Events (8)

Approval Event

Parameters

owner	address
spender	address
value	uint256

HashRedeemed Event

Parameters

txHash	bytes32
from	address

OwnershipTransferred Event

Parameters

previousOwner	address
newOwner	address

Paused Event

Parameters

account

address

PauserAdded Event

Parameters

account

address

PauserRemoved Event

Parameters

account

address

Transfer Event

Parameters

from	address
to	address
value	uint256

Unpaused Event

Parameters

account

address

State Variables (10)

invalidHashes Variable

mapping(bytes32 => bool)

Internal Variable

_balances Variable

mapping(address => uint256)

Internal Variable

_allowed Variable

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

Internal Variable

_totalSupply Variable

uint256

Internal Variable

_name Variable

string

Internal Variable

_symbol Variable

string

Internal Variable

_decimals Variable

uint8

Internal Variable

_paused Variable

bool

Internal Variable

_pausers Variable

Roles.Role

Internal Variable

_owner Variable

address

Internal Variable

Functions Expand All Collapse All

owner

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

function owner() public view returns (address) {
  return _owner;
}

isOwner

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

function isOwner() public view returns (bool) {
  return msg.sender == _owner;
}

renounceOwnership

Parameters

This function has no parameters.

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

null

Source Code

function renounceOwnership() public onlyOwner {
  emit OwnershipTransferred(_owner, address(0));
  _owner = address(0);
}

transferOwnership

Parameters

Name	Type
newOwner	address

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

null

Requirements

newOwner must not be equal to UNKNOWN VALUE

Source Code

function transferOwnership(address newOwner) public onlyOwner {
  _transferOwnership(newOwner);
}

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];
}

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];
}

transfer

Parameters

Name	Type
to	address
value	uint256

Properties

Visibility public

Mutability transaction

Modifiers

whenNotPaused checks for the following:

_paused must not be true

Requirements

to must not be equal to UNKNOWN VALUE

Source Code

function transfer(address to, uint256 value)
  public
  whenNotPaused
  returns (bool)
{
  return super.transfer(to, value);
}

approve

Parameters

Name	Type
spender	address
value	uint256

Properties

Visibility public

Mutability transaction

Modifiers

whenNotPaused checks for the following:

_paused must not be true

Requirements

spender must not be equal to UNKNOWN VALUE

the sender's address must not be equal to UNKNOWN VALUE

Source Code

function approve(address spender, uint256 value)
  public
  whenNotPaused
  returns (bool)
{
  return super.approve(spender, value);
}

transferFrom

Parameters

Name	Type
from	address
to	address
value	uint256

Properties

Visibility public

Mutability transaction

Modifiers

whenNotPaused checks for the following:

_paused must not be true

Requirements

to must not be equal to UNKNOWN VALUE

the sender's address must not be equal to UNKNOWN VALUE

Source Code

function transferFrom(
  address from,
  address to,
  uint256 value
) public whenNotPaused returns (bool) {
  return super.transferFrom(from, to, value);
}

increaseAllowance

Parameters

Name	Type
spender	address
addedValue	uint256

Properties

Visibility public

Mutability transaction

Requirements

the sender's address must not be equal to UNKNOWN VALUE

Source Code

function increaseAllowance(address spender, uint256 addedValue)
  public
  returns (bool)
{
  _approve(msg.sender, spender, _allowed[msg.sender][spender].add(addedValue));
  return true;
}

decreaseAllowance

Parameters

Name	Type
spender	address
subtractedValue	uint256

Properties

Visibility public

Mutability transaction

Requirements

the sender's address must not be equal to UNKNOWN VALUE

Source Code

function decreaseAllowance(address spender, uint256 subtractedValue)
  public
  returns (bool)
{
  _approve(
    msg.sender,
    spender,
    _allowed[msg.sender][spender].sub(subtractedValue)
  );
  return true;
}

burn

Parameters

Name	Type
value	uint256

Properties

Visibility public

Mutability transaction

Requirements

the sender's address must not be equal to UNKNOWN VALUE

Source Code

function burn(uint256 value) public {
  _burn(msg.sender, value);
}

burnFrom

Parameters

Name	Type
from	address
value	uint256

Properties

Visibility public

Mutability transaction

Requirements

the sender's address must not be equal to UNKNOWN VALUE

Source Code

function burnFrom(address from, uint256 value) public {
  _burnFrom(from, value);
}

isPauser

Parameters

Name	Type
account	address

Properties

Visibility public

Mutability view

Source Code

function isPauser(address account) public view returns (bool) {
  return _pausers.has(account);
}

addPauser

Parameters

Name	Type
account	address

Properties

Visibility public

Mutability transaction

Modifiers

onlyPauser checks for the following:

null

Source Code

function addPauser(address account) public onlyPauser {
  _addPauser(account);
}

renouncePauser

Parameters

This function has no parameters.

Properties

Visibility public

Mutability transaction

Source Code

function renouncePauser() public {
  _removePauser(msg.sender);
}

paused

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

function paused() public view returns (bool) {
  return _paused;
}

pause

Parameters

This function has no parameters.

Properties

Visibility public

Mutability transaction

Modifiers

onlyPauser checks for the following:

null

whenNotPaused checks for the following:

_paused must not be true

Source Code

function pause() public onlyPauser whenNotPaused {
  _paused = true;
  emit Paused(msg.sender);
}

unpause

Parameters

This function has no parameters.

Properties

Visibility public

Mutability transaction

Modifiers

onlyPauser checks for the following:

null

whenPaused checks for the following:

_paused must be true

Source Code

function unpause() public onlyPauser whenPaused {
  _paused = false;
  emit Unpaused(msg.sender);
}

increaseAllowance

Parameters

Name	Type
spender	address
addedValue	uint

Properties

Visibility public

Mutability transaction

Modifiers

whenNotPaused checks for the following:

_paused must not be true

Requirements

the sender's address must not be equal to UNKNOWN VALUE

Source Code

function increaseAllowance(address spender, uint256 addedValue)
  public
  whenNotPaused
  returns (bool success)
{
  return super.increaseAllowance(spender, addedValue);
}

decreaseAllowance

Parameters

Name	Type
spender	address
subtractedValue	uint

Properties

Visibility public

Mutability transaction

Modifiers

whenNotPaused checks for the following:

_paused must not be true

Requirements

the sender's address must not be equal to UNKNOWN VALUE

Source Code

function decreaseAllowance(address spender, uint256 subtractedValue)
  public
  whenNotPaused
  returns (bool success)
{
  return super.decreaseAllowance(spender, subtractedValue);
}

name

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

function name() public view returns (string memory) {
  return _name;
}

symbol

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

function symbol() public view returns (string memory) {
  return _symbol;
}

decimals

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

function decimals() public view returns (uint8) {
  return _decimals;
}

circulatingSupply

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

function circulatingSupply() public view returns (uint256) {
  return totalSupply().sub(balanceOf(owner()));
}

transferAnyERC20Token

Parameters

Name	Type
tokenAddress	address
tokens	uint256

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

null

Source Code

function transferAnyERC20Token(address tokenAddress, uint256 tokens)
  public
  onlyOwner
  returns (bool success)
{
  return ERC20(tokenAddress).transfer(owner(), tokens);
}

transferPreSigned

Parameters

Name	Type
to	address
value	uint256
gasPrice	uint256
nonce	uint256
signature	bytes

Properties

Visibility public

Mutability transaction

Modifiers

whenNotPaused checks for the following:

_paused must not be true

Requirements

to must not be equal to UNKNOWN VALUE

from must not be equal to UNKNOWN VALUE

invalidHashes for txHash must not be true

to must not be equal to UNKNOWN VALUE

Source Code

function transferPreSigned(
  address to,
  uint256 value,
  uint256 gasPrice,
  uint256 nonce,
  bytes memory signature
) public whenNotPaused returns (bool) {
  uint256 gas = gasleft();

  require(to != address(0));

  bytes32 payloadHash = transferPreSignedPayloadHash(
    address(this),
    to,
    value,
    gasPrice,
    nonce
  );

  // Recover signer address from signature
  address from = payloadHash.toEthSignedMessageHash().recover(signature);
  require(from != address(0), "Invalid signature provided.");

  // Generate transaction hash
  bytes32 txHash = keccak256(abi.encodePacked(from, payloadHash));

  // Make sure this transfer didn't happen yet
  require(!invalidHashes[txHash], "Transaction has already been executed.");

  // Mark hash as used
  invalidHashes[txHash] = true;

  // Initiate token transfer
  _transfer(from, to, value);

  // If a gas price is set, pay the sender of this transaction in tokens
  uint256 fee = 0;
  if (gasPrice > 0) {
    // 21000 base + ~14000 transfer + ~10000 event
    gas = 21000 + 14000 + 10000 + gas.sub(gasleft());
    fee = gasPrice.mul(gas);
    _transfer(from, tx.origin, fee);
  }

  emit HashRedeemed(txHash, from);

  return true;
}

transferPreSignedPayloadHash

Parameters

Name	Type
token	address
to	address
value	uint256
gasPrice	uint256
nonce	uint256

Properties

Visibility public

Mutability pure

Source Code

function transferPreSignedPayloadHash(
  address token,
  address to,
  uint256 value,
  uint256 gasPrice,
  uint256 nonce
) public pure returns (bytes32) {
  /* "452d3c59": transferPreSignedPayloadHash(address,address,uint256,uint256,uint256) */
  return
    keccak256(
      abi.encodePacked(bytes4(0x452d3c59), token, to, value, gasPrice, nonce)
    );
}

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 ERC20._transfer

Parameters

Name	Type
from	address
to	address
value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

to must not be equal to UNKNOWN VALUE

Source Code

function _transfer(
  address from,
  address to,
  uint256 value
) internal {
  require(to != address(0));

  _balances[from] = _balances[from].sub(value);
  _balances[to] = _balances[to].add(value);
  emit Transfer(from, to, value);
}

internal ERC20._mint

Parameters

Name	Type
account	address
value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

account must not be equal to UNKNOWN VALUE

Source Code

function _mint(address account, uint256 value) internal {
  require(account != address(0));

  _totalSupply = _totalSupply.add(value);
  _balances[account] = _balances[account].add(value);
  emit Transfer(address(0), account, value);
}

internal ERC20._burn

Parameters

Name	Type
account	address
value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

the sender's address must not be equal to UNKNOWN VALUE

Source Code

function _burn(address account, uint256 value) internal {
  require(account != address(0));

  _totalSupply = _totalSupply.sub(value);
  _balances[account] = _balances[account].sub(value);
  emit Transfer(account, address(0), value);
}

internal ERC20._approve

Parameters

Name	Type
owner	address
spender	address
value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

the sender's address must not be equal to UNKNOWN VALUE

Source Code

function _approve(
  address owner,
  address spender,
  uint256 value
) internal {
  require(spender != address(0));
  require(owner != address(0));

  _allowed[owner][spender] = value;
  emit Approval(owner, spender, value);
}

internal ERC20._burnFrom

Parameters

Name	Type
account	address
value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

the sender's address must not be equal to UNKNOWN VALUE

Source Code

function _burnFrom(address account, uint256 value) internal {
  _burn(account, value);
  _approve(account, msg.sender, _allowed[account][msg.sender].sub(value));
}

internal ERC20._transfer

Parameters

Name	Type
from	address
to	address
value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

to must not be equal to UNKNOWN VALUE

Source Code

function _transfer(
  address from,
  address to,
  uint256 value
) internal {
  require(to != address(0));

  _balances[from] = _balances[from].sub(value);
  _balances[to] = _balances[to].add(value);
  emit Transfer(from, to, value);
}

internal ERC20._mint

Parameters

Name	Type
account	address
value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

account must not be equal to UNKNOWN VALUE

Source Code

function _mint(address account, uint256 value) internal {
  require(account != address(0));

  _totalSupply = _totalSupply.add(value);
  _balances[account] = _balances[account].add(value);
  emit Transfer(address(0), account, value);
}

internal ERC20._burn

Parameters

Name	Type
account	address
value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

the sender's address must not be equal to UNKNOWN VALUE

Source Code

function _burn(address account, uint256 value) internal {
  require(account != address(0));

  _totalSupply = _totalSupply.sub(value);
  _balances[account] = _balances[account].sub(value);
  emit Transfer(account, address(0), value);
}

internal ERC20._approve

Parameters

Name	Type
owner	address
spender	address
value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

the sender's address must not be equal to UNKNOWN VALUE

Source Code

function _approve(
  address owner,
  address spender,
  uint256 value
) internal {
  require(spender != address(0));
  require(owner != address(0));

  _allowed[owner][spender] = value;
  emit Approval(owner, spender, value);
}

internal ERC20._burnFrom

Parameters

Name	Type
account	address
value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

the sender's address must not be equal to UNKNOWN VALUE

Source Code

function _burnFrom(address account, uint256 value) internal {
  _burn(account, value);
  _approve(account, msg.sender, _allowed[account][msg.sender].sub(value));
}

internal Pausable.constructor

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability transaction

Source Code

constructor() internal {
  _paused = false;
}

internal PauserRole.constructor

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability transaction

Source Code

constructor() internal {
  _addPauser(msg.sender);
}

internal PauserRole._addPauser

Parameters

Name	Type
account	address

Properties

Visibility internal

Mutability transaction

Source Code

function _addPauser(address account) internal {
  _pausers.add(account);
  emit PauserAdded(account);
}

internal PauserRole._removePauser

Parameters

Name	Type
account	address

Properties

Visibility internal

Mutability transaction

Source Code

function _removePauser(address account) internal {
  _pausers.remove(account);
  emit PauserRemoved(account);
}

internal ERC20._transfer

Parameters

Name	Type
from	address
to	address
value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

to must not be equal to UNKNOWN VALUE

Source Code

function _transfer(
  address from,
  address to,
  uint256 value
) internal {
  require(to != address(0));

  _balances[from] = _balances[from].sub(value);
  _balances[to] = _balances[to].add(value);
  emit Transfer(from, to, value);
}

internal ERC20._mint

Parameters

Name	Type
account	address
value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

account must not be equal to UNKNOWN VALUE

Source Code

function _mint(address account, uint256 value) internal {
  require(account != address(0));

  _totalSupply = _totalSupply.add(value);
  _balances[account] = _balances[account].add(value);
  emit Transfer(address(0), account, value);
}

internal ERC20._burn

Parameters

Name	Type
account	address
value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

the sender's address must not be equal to UNKNOWN VALUE

Source Code

function _burn(address account, uint256 value) internal {
  require(account != address(0));

  _totalSupply = _totalSupply.sub(value);
  _balances[account] = _balances[account].sub(value);
  emit Transfer(account, address(0), value);
}

internal ERC20._approve

Parameters

Name	Type
owner	address
spender	address
value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

the sender's address must not be equal to UNKNOWN VALUE

Source Code

function _approve(
  address owner,
  address spender,
  uint256 value
) internal {
  require(spender != address(0));
  require(owner != address(0));

  _allowed[owner][spender] = value;
  emit Approval(owner, spender, value);
}

internal ERC20._burnFrom

Parameters

Name	Type
account	address
value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

the sender's address must not be equal to UNKNOWN VALUE

Source Code

function _burnFrom(address account, uint256 value) internal {
  _burn(account, value);
  _approve(account, msg.sender, _allowed[account][msg.sender].sub(value));
}

internal Ownable.constructor

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability transaction

Source Code

constructor() internal {
  _owner = msg.sender;
  emit OwnershipTransferred(address(0), _owner);
}

internal Ownable._transferOwnership

Parameters

Name	Type
newOwner	address

Properties

Visibility internal

Mutability transaction

Requirements

newOwner must not be equal to UNKNOWN VALUE

Source Code

function _transferOwnership(address newOwner) internal {
  require(newOwner != address(0));
  emit OwnershipTransferred(_owner, newOwner);
  _owner = newOwner;
}

Levolution.io Token

ERC20

About link description

Stats

Library Use

Events (8) keyboard_arrow_up

Approval Event

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

HashRedeemed 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.

Paused Event

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

PauserAdded Event

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

PauserRemoved 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.

Unpaused Event

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

State Variables (10) keyboard_arrow_up

invalidHashes Variable

_balances Variable

_allowed Variable

_totalSupply Variable

_name Variable

_symbol Variable

_decimals Variable

_paused Variable

_pausers Variable

_owner Variable

Functions Expand All Collapse All

owner 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

isOwner 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

renounceOwnership 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

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

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

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

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.

whenNotPaused 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

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

whenNotPaused 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.

About

Events (8)

Parameters

Parameters

Parameters

Parameters

Parameters

Parameters

Parameters

Parameters

State Variables (10)

owner

Parameters

isOwner

Parameters

renounceOwnership

Parameters

Modifiers

transferOwnership

Parameters

Modifiers

Requirements

totalSupply

Parameters

balanceOf

Parameters

allowance

Parameters

transfer

Parameters

Modifiers

Requirements

approve

Parameters

Modifiers

Requirements

transferFrom

Parameters

Modifiers

Requirements

increaseAllowance

Parameters

Requirements

decreaseAllowance

Parameters

Requirements

burn

Parameters

Requirements

burnFrom

Parameters

Requirements

isPauser

Parameters

addPauser

Parameters

Modifiers

renouncePauser

Parameters

paused

Parameters

pause

Parameters

Modifiers

unpause

Parameters

Modifiers

increaseAllowance

Parameters

Modifiers

Requirements

decreaseAllowance

Parameters