CommerceBlock Token

0x076c97e1c869072ee22f8c91978c99b4bcb02591 Copy

ERC20

This contract is an ERC20 token.

Name CommerceBlock Token

Symbol CBT

Decimals 18

Total Supply 1,000,000,000 CBT

About

Stats

Public Functions 7

Event Types 2

Code Size 5,293 bytes

Events (2)

Approval Event

Parameters

owner	address
spender	address
value	uint256

Transfer Event

Parameters

from	address
to	address
value	uint256

State Variables (8)

name Variable

string

symbol Variable

string

decimals Variable

uint256

supplyExponent Variable

uint256

totalSupply Variable

uint256

totalSupply Variable

uint256

allowed Variable

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

Internal Variable

balances Variable

mapping(address => uint256)

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	uint256

Properties

Visibility public

Mutability transaction

Requirements

_to must not be equal to UNKNOWN VALUE

Source Code

function transfer(address _to, uint256 _value) returns (bool) {
  require(_to != address(0));

  // In case of insufficient funds, SafeMath#sub throws exception.
  balances[msg.sender] = balances[msg.sender].sub(_value);
  balances[_to] = balances[_to].add(_value);
  Transfer(msg.sender, _to, _value);
  return true;
}

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	uint256

Properties

Visibility public

Mutability transaction

Requirements

_to must not be equal to UNKNOWN VALUE

Source Code

function transferFrom(
  address _from,
  address _to,
  uint256 _value
) returns (bool) {
  require(_to != address(0));

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

  // In case of insufficient funds, SafeMath#sub throws exception.

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

approve

Parameters

Name	Type
_spender	address
_value	uint256

Properties

Visibility public

Mutability transaction

Requirements

One or more of the following:

Source Code

function approve(address _spender, uint256 _value) returns (bool) {
  // 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
  require((_value == 0) || (allowed[msg.sender][_spender] == 0));

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

increaseApproval

Parameters

Name	Type
_spender	address
_addedValue	uint

Properties

Visibility public

Mutability transaction

Source Code

function increaseApproval(address _spender, uint256 _addedValue)
  returns (bool success)
{
  allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(
    _addedValue
  );
  Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
  return true;
}

decreaseApproval

Parameters

Name	Type
_spender	address
_subtractedValue	uint

Properties

Visibility public

Mutability transaction

Source Code

function decreaseApproval(address _spender, uint256 _subtractedValue)
  returns (bool success)
{
  uint256 oldValue = allowed[msg.sender][_spender];
  if (_subtractedValue > oldValue) {
    allowed[msg.sender][_spender] = 0;
  } else {
    allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
  }
  Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
  return true;
}

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.

CommerceBlock Token

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 (8) keyboard_arrow_up

name Variable

symbol Variable

decimals Variable

supplyExponent Variable

totalSupply 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

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

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

Source Code

Internal Functions Expand All Collapse All

CONNECT WITH US

SUBSCRIBE TO THE BLOCKWELL NEWSLETTER TO RECEIVE UPDATES AND VALUABLE RESOURCES

Events (2)

Parameters

Parameters

State Variables (8)

balanceOf

Parameters

transfer

Parameters

Requirements

allowance

Parameters

transferFrom

Parameters

Requirements

approve

Parameters

Requirements

increaseApproval

Parameters

decreaseApproval

Parameters