Boxx

0x780116d91e5592e58a3b3c76a351571b39abcec6 Copy

ERC20

This contract is an ERC20 token.

Name Boxx

Symbol BOXX

Decimals 15

Total Supply 90,000,000 BOXX

About

Stats

Public Functions 5

Event Types 2

Code Size 6,086 bytes

Events (2)

Approval Event

Parameters

owner	address
spender	address
value	uint

Transfer Event

Parameters

from	address
to	address
value	uint

State Variables (7)

name Variable

string

symbol Variable

string

decimals Variable

uint

INITIAL_SUPPLY Variable

uint

totalSupply Variable

uint

allowed Variable

mapping(address => mapping(address => uint))

Internal Variable

balances Variable

mapping(address => uint)

Internal Variable

Functions Expand All Collapse All

balanceOf

Parameters

Name	Type
_owner	address

Properties

Visibility public

Mutability constant

Source Code

function balanceOf(address _owner) constant returns (uint256 balance) {
  return balances[_owner];
}

transfer

Parameters

Name	Type
_to	address
_value	uint

Properties

Visibility public

Mutability transaction

Modifiers

onlyPayloadSize checks for the following:

the number of values in undefined must be greater than or equal to 2 * 32 + 4

Requirements

_to must not be equal to UNKNOWN VALUE

Source Code

function transfer(address _to, uint256 _value) onlyPayloadSize(2 * 32) {
  require(_to != address(0)); //prevents 0x0 address
  balances[msg.sender] = balances[msg.sender].sub(_value);
  balances[_to] = balances[_to].add(_value);
  Transfer(msg.sender, _to, _value);
}

allowance

Parameters

Name	Type
_owner	address
_spender	address

Properties

Visibility public

Mutability constant

Source Code

function allowance(address _owner, address _spender)
  constant
  returns (uint256 remaining)
{
  return allowed[_owner][_spender];
}

transferFrom

Parameters

Name	Type
_from	address
_to	address
_value	uint

Properties

Visibility public

Mutability transaction

Modifiers

onlyPayloadSize checks for the following:

the number of values in undefined must be greater than or equal to 2 * 32 + 4

Requirements

_to must not be equal to UNKNOWN VALUE

_value must be less than or equal to balances for _from

Source Code

function transferFrom(
  address _from,
  address _to,
  uint256 _value
) onlyPayloadSize(3 * 32) {
  require(_to != address(0)); //prevents 0x0 address
  require(_value <= balances[_from]);

  var _allowance = allowed[_from][msg.sender];

  // Check is not needed because sub(_allowance, _value) will already throw if this condition is not met
  // if (_value > _allowance) throw;

  balances[_to] = balances[_to].add(_value);
  balances[_from] = balances[_from].sub(_value);
  allowed[_from][msg.sender] = _allowance.sub(_value);
  Transfer(_from, _to, _value);
}

approve

Parameters

Name	Type
_spender	address
_value	uint

Properties

Visibility public

Mutability transaction

Requirements

One or more of the following:

Source Code

function approve(address _spender, uint256 _value) {
  // To change the approve amount you first have to reduce the addresses`
  //  allowance to zero by calling `approve(_spender, 0)` if it is not
  //  already 0 to mitigate the race condition described here:
  //  https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
  if ((_value != 0) && (allowed[msg.sender][_spender] != 0)) throw;

  allowed[msg.sender][_spender] = _value;
  Approval(msg.sender, _spender, _value);
}

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.

Boxx

ERC20

About

Stats

Events (2) keyboard_arrow_up

Approval 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 (7) keyboard_arrow_up

name Variable

symbol Variable

decimals Variable

INITIAL_SUPPLY Variable

totalSupply Variable

allowed Variable

balances Variable

Functions Expand All Collapse All

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

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

onlyPayloadSize 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

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

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

onlyPayloadSize 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

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

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Events (2)

Parameters

Parameters

State Variables (7)

balanceOf

Parameters

transfer

Parameters

Modifiers

Requirements

allowance

Parameters

transferFrom

Parameters

Modifiers

Requirements

approve

Parameters

Requirements