Blockwell

Online.io

ERC20

This contract is an ERC20 token.

Name Online.io
Symbol OIO
Decimals 18
Total Supply 2,500,000,000 OIO

About

Stats

Public Functions 15
Event Types 4
Code Size 10,004 bytes

Events (4) keyboard_arrow_up

Approval Event

Parameters help
owner
address help
spender
address help
value
uint256 help

Burn Event

Parameters help
burner
address help
value
uint256 help

OwnershipTransferred Event

Parameters help
previousOwner
address help
newOwner
address help

Transfer Event

Parameters help
from
address help
to
address help
value
uint256 help

name Variable

string help

symbol Variable

string help

decimals Variable

uint8 help

owner Variable

address help

investors Variable

address[] help
Internal Variable

isInvestor Variable

mapping(address => bool) help
Internal Variable

frozen Variable

bool help
Internal Variable

allowed Variable

mapping(address => mapping(address => uint256)) help
Internal Variable

balances Variable

mapping(address => uint256) help
Internal Variable

totalSupply_ Variable

uint256 help
Internal Variable

Functions Expand All Collapse All

Parameters help

Name Type
newOwner
address help

Properties

Visibility help public
Mutability help transaction

Requirements help

Source Code
function transferOwnership(address newOwner) public onlyOwner {
  require(newOwner != address(0));
  emit OwnershipTransferred(owner, newOwner);
  owner = newOwner;
}

Parameters help

This function has no parameters.

Properties

Visibility help public
Mutability help view
Source Code
function totalSupply() public view returns (uint256) {
  return totalSupply_;
}

Parameters help

Name Type
_owner
address help

Properties

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

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) public returns (bool) {
  require(!frozen);
  require(_to != address(0));
  require(_value <= balances[msg.sender]);

  balances[msg.sender] = balances[msg.sender].sub(_value);
  balances[_to] = balances[_to].add(_value);
  if (!isInvestor[_to]) {
    isInvestor[_to] = true;
    investors.push(_to);
  }
  emit Transfer(msg.sender, _to, _value);
  return true;
}

Parameters help

Name Type
_value
uint256 help

Properties

Visibility help public
Mutability help transaction
Source Code
function burn(uint256 _value) public {
  _burn(msg.sender, _value);
}

Parameters help

Name Type
_owner
address help
_spender
address help

Properties

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

Parameters help

Name Type
_from
address help
_to
address help
_value
uint256 help

Properties

Visibility help public
Mutability help transaction

Requirements help

Source Code
function transferFrom(
  address _from,
  address _to,
  uint256 _value
) public returns (bool) {
  require(!frozen);
  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);
  if (!isInvestor[_to]) {
    isInvestor[_to] = true;
    investors.push(_to);
  }
  emit Transfer(_from, _to, _value);
  return true;
}

Parameters help

Name Type
_spender
address help
_value
uint256 help

Properties

Visibility help public
Mutability help transaction

Requirements help

Source Code
function approve(address _spender, uint256 _value) public returns (bool) {
  require(!frozen);
  allowed[msg.sender][_spender] = _value;
  emit Approval(msg.sender, _spender, _value);
  return true;
}

Parameters help

Name Type
_spender
address help
_addedValue
uint help

Properties

Visibility help public
Mutability help transaction

Requirements help

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

Parameters help

Name Type
_spender
address help
_subtractedValue
uint help

Properties

Visibility help public
Mutability help transaction

Requirements help

Source Code
function decreaseApproval(address _spender, uint256 _subtractedValue)
  public
  returns (bool)
{
  require(!frozen);
  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;
}

Parameters help

This function has no parameters.

Properties

Visibility help public
Mutability help transaction
Source Code
function freeze() public onlyOwner {
  frozen = true;
}

Parameters help

This function has no parameters.

Properties

Visibility help public
Mutability help transaction
Source Code
function unFreeze() public onlyOwner {
  frozen = false;
}

Parameters help

Name Type
_from
address help
_tokenAmount
uint256 help

Properties

Visibility help public
Mutability help transaction
Source Code
function transferBack(address _from, uint256 _tokenAmount) public onlyOwner {
  require(_from != address(0));
  require(_tokenAmount <= balances[_from]);

  balances[_from] = balances[_from].sub(_tokenAmount);
  balances[msg.sender] = balances[msg.sender].add(_tokenAmount);
  emit Transfer(_from, msg.sender, _tokenAmount);
}

Parameters help

Name Type
_toAccounts
address[] help
_tokenAmount
uint256[] help

Properties

Visibility help public
Mutability help transaction
Source Code
function transferBulk(address[] _toAccounts, uint256[] _tokenAmount)
  public
  onlyOwner
{
  require(_toAccounts.length == _tokenAmount.length);
  for (uint256 i = 0; i < _toAccounts.length; i++) {
    balances[msg.sender] = balances[msg.sender].sub(_tokenAmount[i]);
    balances[_toAccounts[i]] = balances[_toAccounts[i]].add(_tokenAmount[i]);
    if (!isInvestor[_toAccounts[i]]) {
      isInvestor[_toAccounts[i]] = true;
      investors.push(_toAccounts[i]);
    }
  }
}

Parameters help

This function has no parameters.

Properties

Visibility help public
Mutability help view
Source Code
function getInvestorsAndTheirBalances()
  public
  view
  returns (address[], uint256[])
{
  uint256[] memory tempBalances = new uint256[](investors.length);
  for (uint256 i = 0; i < investors.length; i++) {
    tempBalances[i] = balances[investors[i]];
  }
  return (investors, tempBalances);
}

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 BurnableToken._burn keyboard_arrow_up

Parameters help

Name Type
_who
address help
_value
uint256 help

Properties

Visibility help internal
Mutability help transaction
Source Code
function _burn(address _who, uint256 _value) internal {
  require(_value <= balances[_who]);

  balances[_who] = balances[_who].sub(_value);
  totalSupply_ = totalSupply_.sub(_value);
  emit Burn(_who, _value);
  emit Transfer(_who, address(0), _value);
}