BandToken

0xba11d00c5f74255f56a5e366f4f77f5a186d7f55 Copy

ERC20

This contract is an ERC20 token.

Name BandToken

Symbol BAND

Decimals 18

Total Supply 100,000,000 BAND

About

Band Protocol (BAND) is a cryptocurrency and operates on the Ethereum platform. Band Protocol has a current supply of 100,000,000 with 35,191,821 in circulation. The last known price of Band Protocol is 5.29920599 USD and is down -4.04 over the last 24 hours. It is currently trading on 127 active market(s) with $35,097,219.73 traded over the last 24 hours. More information can be found at https://bandprotocol.com/.

Stats

Public Functions 16

Event Types 4

Code Size 18,312 bytes

Events (4)

Approval Event

Parameters

owner	address
spender	address
value	uint256

MinterAdded Event

Parameters

account

address

MinterRemoved Event

Parameters

account

address

Transfer Event

Parameters

from	address
to	address
value	uint256

State Variables (10)

name Variable

string

symbol Variable

string

decimals Variable

uint8

votingPowerChangeNonce Variable

uint256

votingPowerChangeCount Variable

mapping(address => uint256)

_balances Variable

mapping(address => uint256)

Internal Variable

_allowed Variable

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

Internal Variable

_totalSupply Variable

uint256

Internal Variable

_minters Variable

Roles.Role

Internal Variable

_votingPower Variable

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

Internal Variable

Functions Expand All Collapse All

isMinter

Parameters

Name	Type
account	address

Properties

Visibility public

Mutability view

Source Code

function isMinter(address account) public view returns (bool) {
  return _minters.has(account);
}

addMinter

Parameters

Name	Type
account	address

Properties

Visibility public

Mutability transaction

Modifiers

onlyMinter checks for the following:

null

Source Code

function addMinter(address account) public onlyMinter {
  _addMinter(account);
}

renounceMinter

Parameters

This function has no parameters.

Properties

Visibility public

Mutability transaction

Source Code

function renounceMinter() public {
  _removeMinter(msg.sender);
}

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) {
  return _balances[owner];
}

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];
}

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) public returns (bool) {
  _transfer(msg.sender, to, value);
  return true;
}

approve

Parameters

Name	Type
spender	address
value	uint256

Properties

Visibility public

Mutability transaction

Requirements

spender must not be equal to UNKNOWN VALUE

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;
}

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
) public returns (bool) {
  _allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value);
  _transfer(from, to, value);
  emit Approval(from, msg.sender, _allowed[from][msg.sender]);
  return true;
}

increaseAllowance

Parameters

Name	Type
spender	address
addedValue	uint256

Properties

Visibility public

Mutability transaction

Requirements

spender must not be equal to UNKNOWN VALUE

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;
}

decreaseAllowance

Parameters

Name	Type
spender	address
subtractedValue	uint256

Properties

Visibility public

Mutability transaction

Requirements

spender must not be equal to UNKNOWN VALUE

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;
}

transferAndCall

Parameters

Name	Type
to	address
value	uint256
sig	bytes4
data	bytes

Properties

Visibility public

Mutability transaction

Requirements

to must not be equal to UNKNOWN VALUE

success must be true

Source Code

function transferAndCall(
  address to,
  uint256 value,
  bytes4 sig,
  bytes memory data
) public returns (bool) {
  require(to != address(this));
  _transfer(msg.sender, to, value);
  (bool success, ) = to.call(
    abi.encodePacked(sig, uint256(msg.sender), value, data)
  );
  require(success);
  return true;
}

mint

Parameters

Name	Type
to	address
value	uint256

Properties

Visibility public

Mutability transaction

Modifiers

onlyMinter checks for the following:

null

Requirements

to must not be equal to UNKNOWN VALUE

Source Code

function mint(address to, uint256 value) public onlyMinter returns (bool) {
  _mint(to, value);
  return true;
}

burn

Parameters

Name	Type
from	address
value	uint256

Properties

Visibility public

Mutability transaction

Modifiers

onlyMinter checks for the following:

null

Requirements

from must not be equal to UNKNOWN VALUE

Source Code

function burn(address from, uint256 value) public onlyMinter returns (bool) {
  _burn(from, value);
  return true;
}

historicalVotingPowerAtIndex

Parameters

Name	Type
owner	address
index	uint256

Properties

Visibility public

Mutability view

Requirements

index must be less than or equal to votingPowerChangeCount for owner

Source Code

function historicalVotingPowerAtIndex(address owner, uint256 index)
  public
  view
  returns (uint256)
{
  require(index <= votingPowerChangeCount[owner]);
  return _votingPower[owner][index] & ((1 << 192) - 1); // Lower 192 bits
}

historicalVotingPowerAtNonce

Parameters

Name	Type
owner	address
nonce	uint256

Properties

Visibility public

Mutability view

Requirements

nonce must be less than UNKNOWN VALUE

nonce must be less than or equal to votingPowerChangeNonce

start must be less than or equal to votingPowerChangeCount for owner

Source Code

function historicalVotingPowerAtNonce(address owner, uint256 nonce)
  public
  view
  returns (uint256)
{
  require(nonce <= votingPowerChangeNonce && nonce < (1 << 64));
  uint256 start = 0;
  uint256 end = votingPowerChangeCount[owner];
  while (start < end) {
    uint256 mid = start.add(end).add(1).div(2); /// Use (start+end+1)/2 to prevent infinite loop.
    if ((_votingPower[owner][mid] >> 192) > nonce) {
      /// Upper 64-bit nonce
      /// If midTime > nonce, this mid can't possibly be the answer.
      end = mid.sub(1);
    } else {
      /// Otherwise, search on the greater side, but still keep mid as a possible option.
      start = mid;
    }
  }
  return historicalVotingPowerAtIndex(owner, start);
}

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

Parameters

Name	Type
from	address
to	address
value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

to must not be equal to UNKNOWN VALUE

Source Code

function _transfer(
  address from,
  address to,
  uint256 value
) internal {
  require(to != address(0));

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

internal ERC20._mint

Parameters

Name	Type
account	address
value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

to must not be equal to UNKNOWN VALUE

Source Code

function _mint(address account, uint256 value) internal {
  require(account != address(0));

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

internal ERC20._burn

Parameters

Name	Type
account	address
value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

from must not be equal to UNKNOWN VALUE

Source Code

function _burn(address account, uint256 value) internal {
  require(account != address(0));

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

internal ERC20._burnFrom

Parameters

Name	Type
account	address
value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

from must not be equal to UNKNOWN VALUE

Source Code

function _burnFrom(address account, uint256 value) internal {
  _allowed[account][msg.sender] = _allowed[account][msg.sender].sub(value);
  _burn(account, value);
  emit Approval(account, msg.sender, _allowed[account][msg.sender]);
}

internal MinterRole.constructor

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability transaction

Source Code

constructor() internal {
  _addMinter(msg.sender);
}

internal MinterRole._addMinter

Parameters

Name	Type
account	address

Properties

Visibility internal

Mutability transaction

Source Code

function _addMinter(address account) internal {
  _minters.add(account);
  emit MinterAdded(account);
}

internal MinterRole._removeMinter

Parameters

Name	Type
account	address

Properties

Visibility internal

Mutability transaction

Source Code

function _removeMinter(address account) internal {
  _minters.remove(account);
  emit MinterRemoved(account);
}

internal SnapshotToken._transfer

Parameters

Name	Type
from	address
to	address
value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

to must not be equal to UNKNOWN VALUE

newPower must be less than UNKNOWN VALUE

votingPowerChangeNonce must be less than UNKNOWN VALUE

newPower must be less than UNKNOWN VALUE

votingPowerChangeNonce must be less than UNKNOWN VALUE

Source Code

function _transfer(
  address from,
  address to,
  uint256 value
) internal {
  super._transfer(from, to, value);
  votingPowerChangeNonce = votingPowerChangeNonce.add(1);
  _changeVotingPower(from);
  _changeVotingPower(to);
}

internal SnapshotToken._mint

Parameters

Name	Type
account	address
amount	uint256

Properties

Visibility internal

Mutability transaction

Requirements

to must not be equal to UNKNOWN VALUE

newPower must be less than UNKNOWN VALUE

votingPowerChangeNonce must be less than UNKNOWN VALUE

Source Code

function _mint(address account, uint256 amount) internal {
  super._mint(account, amount);
  votingPowerChangeNonce = votingPowerChangeNonce.add(1);
  _changeVotingPower(account);
}

internal SnapshotToken._burn

Parameters

Name	Type
account	address
amount	uint256

Properties

Visibility internal

Mutability transaction

Requirements

from must not be equal to UNKNOWN VALUE

newPower must be less than UNKNOWN VALUE

votingPowerChangeNonce must be less than UNKNOWN VALUE

Source Code

function _burn(address account, uint256 amount) internal {
  super._burn(account, amount);
  votingPowerChangeNonce = votingPowerChangeNonce.add(1);
  _changeVotingPower(account);
}

internal SnapshotToken._changeVotingPower

Parameters

Name	Type
account	address

Properties

Visibility internal

Mutability transaction

Requirements

newPower must be less than UNKNOWN VALUE

votingPowerChangeNonce must be less than UNKNOWN VALUE

Source Code

function _changeVotingPower(address account) internal {
  uint256 currentIndex = votingPowerChangeCount[account];
  uint256 newPower = balanceOf(account);
  require(newPower < (1 << 192));
  require(votingPowerChangeNonce < (1 << 64));
  currentIndex = currentIndex.add(1);
  votingPowerChangeCount[account] = currentIndex;
  _votingPower[account][currentIndex] =
    (votingPowerChangeNonce << 192) |
    newPower;
}

internal ERC20._transfer

Parameters

Name	Type
from	address
to	address
value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

to must not be equal to UNKNOWN VALUE

Source Code

function _transfer(
  address from,
  address to,
  uint256 value
) internal {
  require(to != address(0));

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

internal ERC20._mint

Parameters

Name	Type
account	address
value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

to must not be equal to UNKNOWN VALUE

Source Code

function _mint(address account, uint256 value) internal {
  require(account != address(0));

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

internal ERC20._burn

Parameters

Name	Type
account	address
value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

from must not be equal to UNKNOWN VALUE

Source Code

function _burn(address account, uint256 value) internal {
  require(account != address(0));

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

internal ERC20._burnFrom

Parameters

Name	Type
account	address
value	uint256

Properties

Visibility internal

Mutability transaction

Requirements

from must not be equal to UNKNOWN VALUE

Source Code

function _burnFrom(address account, uint256 value) internal {
  _allowed[account][msg.sender] = _allowed[account][msg.sender].sub(value);
  _burn(account, value);
  emit Approval(account, msg.sender, _allowed[account][msg.sender]);
}

internal MinterRole.constructor

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability transaction

Source Code

constructor() internal {
  _addMinter(msg.sender);
}

internal MinterRole._addMinter

Parameters

Name	Type
account	address

Properties

Visibility internal

Mutability transaction

Source Code

function _addMinter(address account) internal {
  _minters.add(account);
  emit MinterAdded(account);
}

internal MinterRole._removeMinter

Parameters

Name	Type
account	address

Properties

Visibility internal

Mutability transaction

Source Code

function _removeMinter(address account) internal {
  _minters.remove(account);
  emit MinterRemoved(account);
}

BandToken

ERC20

About link description

Stats

Events (4) keyboard_arrow_up

Approval Event

Parameters help Event parameters list the data that an event contains.

MinterAdded Event

Parameters help Event parameters list the data that an event contains.

MinterRemoved 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

votingPowerChangeNonce Variable

votingPowerChangeCount Variable

_balances Variable

_allowed Variable

_totalSupply Variable

_minters Variable

_votingPower Variable

Functions Expand All Collapse All

isMinter 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

addMinter 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.

onlyMinter checks for the following:

Source Code

renounceMinter 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

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

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

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

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

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

increaseAllowance 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

decreaseAllowance 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

transferAndCall 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.

About

Events (4)

Parameters

Parameters

Parameters

Parameters

State Variables (10)

isMinter

Parameters

addMinter

Parameters

Modifiers

renounceMinter

Parameters

totalSupply

Parameters

balanceOf

Parameters

allowance

Parameters

transfer

Parameters

Requirements

approve

Parameters

Requirements

transferFrom

Parameters

Requirements

increaseAllowance

Parameters

Requirements

decreaseAllowance

Parameters

Requirements

transferAndCall

Parameters

Requirements

mint

Parameters

Modifiers

Requirements

burn

Parameters

Modifiers

Requirements

historicalVotingPowerAtIndex

Parameters

Requirements

historicalVotingPowerAtNonce

Parameters

Requirements

internal ERC20._transfer

Parameters

Requirements

internal ERC20._mint

Parameters

Requirements

internal ERC20._burn

Parameters

Requirements

internal ERC20._burnFrom

Parameters

Requirements

internal MinterRole.constructor

Parameters

internal MinterRole._addMinter

Parameters

internal MinterRole._removeMinter

Parameters

internal SnapshotToken._transfer

Parameters

Requirements

internal SnapshotToken._mint

Parameters

Requirements

internal SnapshotToken._burn