Online.io

0xa3efef1a1e3d1ad72b9d0f4253e7c9c084c2c08b Copy

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)

Approval Event

Parameters

owner	address
spender	address
value	uint256

Burn Event

Parameters

burner	address
value	uint256

OwnershipTransferred Event

Parameters

previousOwner	address
newOwner	address

Transfer Event

Parameters

from	address
to	address
value	uint256

State Variables (10)

name Variable

string

symbol Variable

string

decimals Variable

uint8

owner Variable

address

investors Variable

address[]

Internal Variable

isInvestor Variable

mapping(address => bool)

Internal Variable

frozen Variable

bool

Internal Variable

allowed Variable

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

Internal Variable

balances Variable

mapping(address => uint256)

Internal Variable

totalSupply_ Variable

uint256

Internal Variable

Functions Expand All Collapse All

transferOwnership

Parameters

Name	Type
newOwner	address

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

owner must be equal to the sender's address

Requirements

newOwner must not be equal to UNKNOWN VALUE

Source Code

function transferOwnership(address newOwner) public onlyOwner {
  require(newOwner != address(0));
  emit OwnershipTransferred(owner, newOwner);
  owner = 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 balance) {
  return balances[_owner];
}

transfer

Parameters

Name	Type
_to	address
_value	uint256

Properties

Visibility public

Mutability transaction

Requirements

frozen must not be true

_to must not be equal to UNKNOWN VALUE

_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) {
  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;
}

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 {
  _burn(msg.sender, _value);
}

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

frozen must not be true

_to must not be equal to UNKNOWN VALUE

_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) {
  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;
}

approve

Parameters

Name	Type
_spender	address
_value	uint256

Properties

Visibility public

Mutability transaction

Requirements

frozen must not be true

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;
}

increaseApproval

Parameters

Name	Type
_spender	address
_addedValue	uint

Properties

Visibility public

Mutability transaction

Requirements

frozen must not be true

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;
}

decreaseApproval

Parameters

Name	Type
_spender	address
_subtractedValue	uint

Properties

Visibility public

Mutability transaction

Requirements

frozen must not be true

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;
}

freeze

Parameters

This function has no parameters.

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

owner must be equal to the sender's address

Source Code

function freeze() public onlyOwner {
  frozen = true;
}

unFreeze

Parameters

This function has no parameters.

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

owner must be equal to the sender's address

Source Code

function unFreeze() public onlyOwner {
  frozen = false;
}

transferBack

Parameters

Name	Type
_from	address
_tokenAmount	uint256

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

owner must be equal to the sender's address

Requirements

_from must not be equal to UNKNOWN VALUE

_tokenAmount must be less than or equal to balances for _from

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);
}

transferBulk

Parameters

Name	Type
_toAccounts	address[]
_tokenAmount	uint256[]

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

owner must be equal to the sender's address

Requirements

the number of values in _toAccounts must be equal to the number of values in _tokenAmount

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]);
    }
  }
}

getInvestorsAndTheirBalances

Parameters

This function has no parameters.

Properties

Visibility public

Mutability 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

Parameters

Name	Type
_who	address
_value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

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

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);
}

Online.io

ERC20

About

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.

OwnershipTransferred 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 (10) keyboard_arrow_up

name Variable

symbol Variable

decimals Variable

owner Variable

investors Variable

isInvestor Variable

frozen Variable

allowed Variable

balances Variable

totalSupply_ Variable

Functions Expand All Collapse All

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

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

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

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

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

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

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

freeze 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

Events (4)

Parameters

Parameters

Parameters

Parameters

State Variables (10)

transferOwnership

Parameters

Modifiers

Requirements

totalSupply

Parameters

balanceOf

Parameters

transfer

Parameters

Requirements

burn

Parameters

Requirements

allowance

Parameters

transferFrom

Parameters

Requirements

approve

Parameters

Requirements

increaseApproval

Parameters

Requirements

decreaseApproval

Parameters

Requirements

freeze

Parameters

Modifiers

unFreeze

Parameters

Modifiers

transferBack

Parameters

Modifiers

Requirements

transferBulk

Parameters

Modifiers

Requirements

getInvestorsAndTheirBalances

Parameters

internal BurnableToken._burn

Parameters

Requirements