Blockwell

digitalbits

ERC20

This contract is an ERC20 token.

Name digitalbits
Symbol XDB
Decimals 7
Total Supply 1,500,000,000 XDB

About link description

DigitalBits (XDB) is a cryptocurrency and operates on the Ethereum platform. DigitalBits has a current supply of 1,500,000,000 with 773,316,017.8820308 in circulation. The last known price of DigitalBits is 0.06617452 USD and is down -15.38 over the last 24 hours. It is currently trading on 10 active market(s) with $610,918.35 traded over the last 24 hours. More information can be found at http://www.digitalbits.io/.

Stats

Public Functions 13
Event Types 2
Code Size 12,074 bytes

Events (2) keyboard_arrow_up

Approval Event

Parameters help
owner
address help
spender
address help
value
uint256 help

Transfer Event

Parameters help
from
address help
to
address help
value
uint256 help

INITIAL_SUPPLY Constant

uint256 help
100000000000 * UNKNOWN VALUE

_balances Variable

mapping(address => uint256) help
Internal Variable

_allowed Variable

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

_totalSupply Variable

uint256 help
Internal Variable

_name Variable

string help
Internal Variable

_symbol Variable

string help
Internal Variable

_decimals Variable

uint8 help
Internal Variable

Functions Expand All Collapse All

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) {
  return _balances[owner];
}

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
to
address help
value
uint256 help

Properties

Visibility help public
Mutability help transaction
Source Code
function transfer(address to, uint256 value) public returns (bool) {
  _transfer(msg.sender, 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(spender != address(0));

  _allowed[msg.sender][spender] = value;
  emit Approval(msg.sender, spender, value);
  return true;
}

Parameters help

Name Type
from
address help
to
address help
value
uint256 help

Properties

Visibility help public
Mutability help transaction
Source Code
function transferFrom(
  address from,
  address to,
  uint256 value
) public returns (bool) {
  require(value <= _allowed[from][msg.sender]);

  _allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value);
  _transfer(from, to, value);
  return true;
}

Parameters help

Name Type
spender
address help
addedValue
uint256 help

Properties

Visibility help public
Mutability help transaction

Requirements help

Source Code
function increaseAllowance(address spender, uint256 addedValue)
  public
  returns (bool)
{
  require(spender != address(0));

  _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
uint256 help

Properties

Visibility help public
Mutability help transaction

Requirements help

Source Code
function decreaseAllowance(address spender, uint256 subtractedValue)
  public
  returns (bool)
{
  require(spender != address(0));

  _allowed[msg.sender][spender] = (
    _allowed[msg.sender][spender].sub(subtractedValue)
  );
  emit Approval(msg.sender, spender, _allowed[msg.sender][spender]);
  return true;
}

burn keyboard_arrow_up

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);
}

burnFrom keyboard_arrow_up

Parameters help

Name Type
from
address help
value
uint256 help

Properties

Visibility help public
Mutability help transaction
Source Code
function burnFrom(address from, uint256 value) public {
  _burnFrom(from, value);
}

Parameters help

This function has no parameters.

Properties

Visibility help public
Mutability help view
Source Code
function name() public view returns (string) {
  return _name;
}

Parameters help

This function has no parameters.

Properties

Visibility help public
Mutability help view
Source Code
function symbol() public view returns (string) {
  return _symbol;
}

Parameters help

This function has no parameters.

Properties

Visibility help public
Mutability help view
Source Code
function decimals() public view returns (uint8) {
  return _decimals;
}

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 keyboard_arrow_up

Parameters help

Name Type
from
address help
to
address help
value
uint256 help

Properties

Visibility help internal
Mutability help transaction
Source Code
function _transfer(
  address from,
  address to,
  uint256 value
) internal {
  require(value <= _balances[from]);
  require(to != address(0));

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

internal ERC20._mint keyboard_arrow_up

Parameters help

Name Type
account
address help
value
uint256 help

Properties

Visibility help internal
Mutability help transaction

Requirements help

Source Code
function _mint(address account, uint256 value) internal {
  require(account != 0);
  _totalSupply = _totalSupply.add(value);
  _balances[account] = _balances[account].add(value);
  emit Transfer(address(0), account, value);
}

internal ERC20._burn keyboard_arrow_up

Parameters help

Name Type
account
address help
value
uint256 help

Properties

Visibility help internal
Mutability help transaction
Source Code
function _burn(address account, uint256 value) internal {
  require(account != 0);
  require(value <= _balances[account]);

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

internal ERC20._burnFrom keyboard_arrow_up

Parameters help

Name Type
account
address help
value
uint256 help

Properties

Visibility help internal
Mutability help transaction
Source Code
function _burnFrom(address account, uint256 value) internal {
  require(value <= _allowed[account][msg.sender]);

  // Should https://github.com/OpenZeppelin/zeppelin-solidity/issues/707 be accepted,
  // this function needs to emit an event with the updated approval.
  _allowed[account][msg.sender] = _allowed[account][msg.sender].sub(value);
  _burn(account, value);
}

internal ERC20._transfer keyboard_arrow_up

Parameters help

Name Type
from
address help
to
address help
value
uint256 help

Properties

Visibility help internal
Mutability help transaction
Source Code
function _transfer(
  address from,
  address to,
  uint256 value
) internal {
  require(value <= _balances[from]);
  require(to != address(0));

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

internal ERC20._mint keyboard_arrow_up

Parameters help

Name Type
account
address help
value
uint256 help

Properties

Visibility help internal
Mutability help transaction

Requirements help

Source Code
function _mint(address account, uint256 value) internal {
  require(account != 0);
  _totalSupply = _totalSupply.add(value);
  _balances[account] = _balances[account].add(value);
  emit Transfer(address(0), account, value);
}

internal ERC20._burn keyboard_arrow_up

Parameters help

Name Type
account
address help
value
uint256 help

Properties

Visibility help internal
Mutability help transaction
Source Code
function _burn(address account, uint256 value) internal {
  require(account != 0);
  require(value <= _balances[account]);

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

internal ERC20._burnFrom keyboard_arrow_up

Parameters help

Name Type
account
address help
value
uint256 help

Properties

Visibility help internal
Mutability help transaction
Source Code
function _burnFrom(address account, uint256 value) internal {
  require(value <= _allowed[account][msg.sender]);

  // Should https://github.com/OpenZeppelin/zeppelin-solidity/issues/707 be accepted,
  // this function needs to emit an event with the updated approval.
  _allowed[account][msg.sender] = _allowed[account][msg.sender].sub(value);
  _burn(account, value);
}