Graph Token

0xc944e90c64b2c07662a292be6244bdf05cda44a7 Copy

ERC20

This contract is an ERC20 token.

Name Graph Token

Symbol GRT

Decimals 18

Total Supply 10,146,397,265 GRT

About

The Graph (GRT) is a cryptocurrency and operates on the Ethereum platform. The Graph has a current supply of 10,000,000,000 with 2,897,903,422 in circulation. The last known price of The Graph is 0.59945062 USD and is down -0.71 over the last 24 hours. It is currently trading on 132 active market(s) with $55,185,580.90 traded over the last 24 hours. More information can be found at https://thegraph.com.

Stats

Public Functions 21

Event Types 6

Code Size 33,336 bytes

Library Use

Uses SafeMath for uint256.

Events (6)

Approval Event

Parameters

owner	address
spender	address
value	uint256

MinterAdded Event

Parameters

account

address

MinterRemoved Event

Parameters

account

address

NewOwnership Event

Parameters

from	address
to	address

NewPendingOwnership Event

Parameters

from	address
to	address

Transfer Event

Parameters

from	address
to	address
value	uint256

Constants (5)

DOMAIN_TYPE_HASH Constant

bytes32

the result of calling keccak256 with "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract,bytes32 salt)"

DOMAIN_NAME_HASH Constant

bytes32

the result of calling keccak256 with "Graph Token"

DOMAIN_VERSION_HASH Constant

bytes32

the result of calling keccak256 with "0"

DOMAIN_SALT Constant

bytes32

0x51f3d585afe6dfeb2af01bba0889a36c1db03beec88c6a4d0c53817069026afa

PERMIT_TYPEHASH Constant

bytes32

the result of calling keccak256 with "Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"

State Variables (11)

governor Variable

address

pendingGovernor Variable

address

nonces Variable

mapping(address => uint256)

DOMAIN_SEPARATOR Variable

bytes32

Internal Variable

_minters Variable

mapping(address => bool)

Internal Variable

_balances Variable

mapping(address => uint256)

Internal Variable

_allowances Variable

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

Internal Variable

_totalSupply Variable

uint256

Internal Variable

_name Variable

string

Internal Variable

_symbol Variable

string

Internal Variable

_decimals Variable

uint8

Internal Variable

Functions Expand All Collapse All

name

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

function name() public view returns (string memory) {
  return _name;
}

symbol

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

function symbol() public view returns (string memory) {
  return _symbol;
}

decimals

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

function decimals() public view returns (uint8) {
  return _decimals;
}

totalSupply

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

function totalSupply() public view override returns (uint256) {
  return _totalSupply;
}

balanceOf

Parameters

Name	Type
account	address

Properties

Visibility public

Mutability view

Source Code

function balanceOf(address account) public view override returns (uint256) {
  return _balances[account];
}

transfer

Parameters

Name	Type
recipient	address
amount	uint256

Properties

Visibility public

Mutability transaction

Requirements

the result of calling _msgSender must not be equal to UNKNOWN VALUE

recipient must not be equal to UNKNOWN VALUE

Source Code

function transfer(address recipient, uint256 amount)
  public
  virtual
  override
  returns (bool)
{
  _transfer(_msgSender(), recipient, amount);
  return true;
}

allowance

Parameters

Name	Type
owner	address
spender	address

Properties

Visibility public

Mutability view

Source Code

function allowance(address owner, address spender)
  public
  view
  virtual
  override
  returns (uint256)
{
  return _allowances[owner][spender];
}

approve

Parameters

Name	Type
spender	address
amount	uint256

Properties

Visibility public

Mutability transaction

Requirements

the result of calling _msgSender must not be equal to UNKNOWN VALUE

spender must not be equal to UNKNOWN VALUE

Source Code

function approve(address spender, uint256 amount)
  public
  virtual
  override
  returns (bool)
{
  _approve(_msgSender(), spender, amount);
  return true;
}

transferFrom

Parameters

Name	Type
sender	address
recipient	address
amount	uint256

Properties

Visibility public

Mutability transaction

Requirements

the result of calling _msgSender must not be equal to UNKNOWN VALUE

recipient must not be equal to UNKNOWN VALUE

the result of calling _msgSender must not be equal to UNKNOWN VALUE

Source Code

function transferFrom(
  address sender,
  address recipient,
  uint256 amount
) public virtual override returns (bool) {
  _transfer(sender, recipient, amount);
  _approve(
    sender,
    _msgSender(),
    _allowances[sender][_msgSender()].sub(
      amount,
      "ERC20: transfer amount exceeds allowance"
    )
  );
  return true;
}

increaseAllowance

Parameters

Name	Type
spender	address
addedValue	uint256

Properties

Visibility public

Mutability transaction

Requirements

the result of calling _msgSender must not be equal to UNKNOWN VALUE

Source Code

function increaseAllowance(address spender, uint256 addedValue)
  public
  virtual
  returns (bool)
{
  _approve(
    _msgSender(),
    spender,
    _allowances[_msgSender()][spender].add(addedValue)
  );
  return true;
}

decreaseAllowance

Parameters

Name	Type
spender	address
subtractedValue	uint256

Properties

Visibility public

Mutability transaction

Requirements

the result of calling _msgSender must not be equal to UNKNOWN VALUE

Source Code

function decreaseAllowance(address spender, uint256 subtractedValue)
  public
  virtual
  returns (bool)
{
  _approve(
    _msgSender(),
    spender,
    _allowances[_msgSender()][spender].sub(
      subtractedValue,
      "ERC20: decreased allowance below zero"
    )
  );
  return true;
}

burn

Parameters

Name	Type
amount	uint256

Properties

Visibility public

Mutability transaction

Requirements

the result of calling _msgSender must not be equal to UNKNOWN VALUE

Source Code

function burn(uint256 amount) public virtual {
  _burn(_msgSender(), amount);
}

burnFrom

Parameters

Name	Type
account	address
amount	uint256

Properties

Visibility public

Mutability transaction

Requirements

the result of calling _msgSender must not be equal to UNKNOWN VALUE

Source Code

function burnFrom(address account, uint256 amount) public virtual {
  uint256 decreasedAllowance = allowance(account, _msgSender()).sub(
    amount,
    "ERC20: burn amount exceeds allowance"
  );

  _approve(account, _msgSender(), decreasedAllowance);
  _burn(account, amount);
}

transferOwnership

Parameters

Name	Type
_newGovernor	address

Properties

Visibility public

Mutability transaction

Modifiers

onlyGovernor checks for the following:

governor must be equal to the sender's address

Requirements

_newGovernor must not be equal to UNKNOWN VALUE

Source Code

function transferOwnership(address _newGovernor) external onlyGovernor {
  require(_newGovernor != address(0), "Governor must be set");

  address oldPendingGovernor = pendingGovernor;
  pendingGovernor = _newGovernor;

  emit NewPendingOwnership(oldPendingGovernor, pendingGovernor);
}

acceptOwnership

Parameters

This function has no parameters.

Properties

Visibility public

Mutability transaction

Requirements

pendingGovernor must be equal to the sender's address

pendingGovernor must not be equal to UNKNOWN VALUE

Source Code

function acceptOwnership() external {
  require(
    pendingGovernor != address(0) && msg.sender == pendingGovernor,
    "Caller must be pending governor"
  );

  address oldGovernor = governor;
  address oldPendingGovernor = pendingGovernor;

  governor = pendingGovernor;
  pendingGovernor = address(0);

  emit NewOwnership(oldGovernor, governor);
  emit NewPendingOwnership(oldPendingGovernor, pendingGovernor);
}

permit

Parameters

Name	Type
_owner	address
_spender	address
_value	uint256
_deadline	uint256
_v	uint8
_r	bytes32
_s	bytes32

Properties

Visibility public

Mutability transaction

Requirements

_owner must be equal to recoveredAddress

One or more of the following: - _deadline must be greater than or equal to block.timestamp - OR _deadline must be equal to 0

the result of calling _msgSender must not be equal to UNKNOWN VALUE

Source Code

function permit(
  address _owner,
  address _spender,
  uint256 _value,
  uint256 _deadline,
  uint8 _v,
  bytes32 _r,
  bytes32 _s
) external {
  bytes32 digest = keccak256(
    abi.encodePacked(
      "\x19\x01",
      DOMAIN_SEPARATOR,
      keccak256(
        abi.encode(
          PERMIT_TYPEHASH,
          _owner,
          _spender,
          _value,
          nonces[_owner],
          _deadline
        )
      )
    )
  );
  nonces[_owner] = nonces[_owner].add(1);

  address recoveredAddress = ECDSA.recover(
    digest,
    abi.encodePacked(_r, _s, _v)
  );
  require(_owner == recoveredAddress, "GRT: invalid permit");
  require(
    _deadline == 0 || block.timestamp <= _deadline,
    "GRT: expired permit"
  );

  _approve(_owner, _spender, _value);
}

addMinter

Parameters

Name	Type
_account	address

Properties

Visibility public

Mutability transaction

Modifiers

onlyGovernor checks for the following:

governor must be equal to the sender's address

Source Code

function addMinter(address _account) external onlyGovernor {
  _addMinter(_account);
}

removeMinter

Parameters

Name	Type
_account	address

Properties

Visibility public

Mutability transaction

Modifiers

onlyGovernor checks for the following:

governor must be equal to the sender's address

Source Code

function removeMinter(address _account) external onlyGovernor {
  _removeMinter(_account);
}

renounceMinter

Parameters

This function has no parameters.

Properties

Visibility public

Mutability transaction

Source Code

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

mint

Parameters

Name	Type
_to	address
_amount	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 _amount) external onlyMinter {
  _mint(_to, _amount);
}

isMinter

Parameters

Name	Type
_account	address

Properties

Visibility public

Mutability view

Source Code

function isMinter(address _account) public view returns (bool) {
  return _minters[_account];
}

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 GraphToken._addMinter

Parameters

Name	Type
_account	address

Properties

Visibility private

Mutability transaction

Source Code

function _addMinter(address _account) private {
  _minters[_account] = true;
  emit MinterAdded(_account);
}

internal GraphToken._removeMinter

Parameters

Name	Type
_account	address

Properties

Visibility private

Mutability transaction

Source Code

function _removeMinter(address _account) private {
  _minters[_account] = false;
  emit MinterRemoved(_account);
}

internal GraphToken._getChainID

Parameters

This function has no parameters.

Properties

Visibility private

Mutability pure

Source Code

function _getChainID() private pure returns (uint256) {
  uint256 id;
  assembly {
    id := chainid()
  }
  return id;
}

internal Governed._initialize

Parameters

Name	Type
_initGovernor	address

Properties

Visibility internal

Mutability transaction

Source Code

function _initialize(address _initGovernor) internal {
  governor = _initGovernor;
}

internal ERC20._transfer

Parameters

Name	Type
sender	address
recipient	address
amount	uint256

Properties

Visibility internal

Mutability transaction

Requirements

the result of calling _msgSender must not be equal to UNKNOWN VALUE

recipient must not be equal to UNKNOWN VALUE

Source Code

function _transfer(
  address sender,
  address recipient,
  uint256 amount
) internal virtual {
  require(sender != address(0), "ERC20: transfer from the zero address");
  require(recipient != address(0), "ERC20: transfer to the zero address");

  _beforeTokenTransfer(sender, recipient, amount);

  _balances[sender] = _balances[sender].sub(
    amount,
    "ERC20: transfer amount exceeds balance"
  );
  _balances[recipient] = _balances[recipient].add(amount);
  emit Transfer(sender, recipient, amount);
}

internal ERC20._mint

Parameters

Name	Type
account	address
amount	uint256

Properties

Visibility internal

Mutability transaction

Requirements

_to must not be equal to UNKNOWN VALUE

Source Code

function _mint(address account, uint256 amount) internal virtual {
  require(account != address(0), "ERC20: mint to the zero address");

  _beforeTokenTransfer(address(0), account, amount);

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

internal ERC20._burn

Parameters

Name	Type
account	address
amount	uint256

Properties

Visibility internal

Mutability transaction

Requirements

the result of calling _msgSender must not be equal to UNKNOWN VALUE

Source Code

function _burn(address account, uint256 amount) internal virtual {
  require(account != address(0), "ERC20: burn from the zero address");

  _beforeTokenTransfer(account, address(0), amount);

  _balances[account] = _balances[account].sub(
    amount,
    "ERC20: burn amount exceeds balance"
  );
  _totalSupply = _totalSupply.sub(amount);
  emit Transfer(account, address(0), amount);
}

internal ERC20._approve

Parameters

Name	Type
owner	address
spender	address
amount	uint256

Properties

Visibility internal

Mutability transaction

Requirements

the result of calling _msgSender must not be equal to UNKNOWN VALUE

Source Code

function _approve(
  address owner,
  address spender,
  uint256 amount
) internal virtual {
  require(owner != address(0), "ERC20: approve from the zero address");
  require(spender != address(0), "ERC20: approve to the zero address");

  _allowances[owner][spender] = amount;
  emit Approval(owner, spender, amount);
}

internal ERC20._setupDecimals

Parameters

Name	Type
decimals_	uint8

Properties

Visibility internal

Mutability transaction

Source Code

function _setupDecimals(uint8 decimals_) internal {
  _decimals = decimals_;
}

internal ERC20._beforeTokenTransfer

Parameters

Name	Type
from	address
to	address
amount	uint256

Properties

Visibility internal

Mutability transaction

Source Code

function _beforeTokenTransfer(
  address from,
  address to,
  uint256 amount
) internal virtual {}

internal Context._msgSender

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability view

Source Code

function _msgSender() internal view virtual returns (address payable) {
  return msg.sender;
}

internal Context._msgData

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability view

Source Code

function _msgData() internal view virtual returns (bytes memory) {
  this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
  return msg.data;
}

internal Context._msgSender

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability view

Source Code

function _msgSender() internal view virtual returns (address payable) {
  return msg.sender;
}

internal Context._msgData

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability view

Source Code

function _msgData() internal view virtual returns (bytes memory) {
  this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
  return msg.data;
}

internal ERC20._transfer

Parameters

Name	Type
sender	address
recipient	address
amount	uint256

Properties

Visibility internal

Mutability transaction

Requirements

the result of calling _msgSender must not be equal to UNKNOWN VALUE

recipient must not be equal to UNKNOWN VALUE

Source Code

function _transfer(
  address sender,
  address recipient,
  uint256 amount
) internal virtual {
  require(sender != address(0), "ERC20: transfer from the zero address");
  require(recipient != address(0), "ERC20: transfer to the zero address");

  _beforeTokenTransfer(sender, recipient, amount);

  _balances[sender] = _balances[sender].sub(
    amount,
    "ERC20: transfer amount exceeds balance"
  );
  _balances[recipient] = _balances[recipient].add(amount);
  emit Transfer(sender, recipient, amount);
}

internal ERC20._mint

Parameters

Name	Type
account	address
amount	uint256

Properties

Visibility internal

Mutability transaction

Requirements

_to must not be equal to UNKNOWN VALUE

Source Code

function _mint(address account, uint256 amount) internal virtual {
  require(account != address(0), "ERC20: mint to the zero address");

  _beforeTokenTransfer(address(0), account, amount);

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

internal ERC20._burn

Parameters

Name	Type
account	address
amount	uint256

Properties

Visibility internal

Mutability transaction

Requirements

the result of calling _msgSender must not be equal to UNKNOWN VALUE

Source Code

function _burn(address account, uint256 amount) internal virtual {
  require(account != address(0), "ERC20: burn from the zero address");

  _beforeTokenTransfer(account, address(0), amount);

  _balances[account] = _balances[account].sub(
    amount,
    "ERC20: burn amount exceeds balance"
  );
  _totalSupply = _totalSupply.sub(amount);
  emit Transfer(account, address(0), amount);
}

internal ERC20._approve

Parameters

Name	Type
owner	address
spender	address
amount	uint256

Properties

Visibility internal

Mutability transaction

Requirements

the result of calling _msgSender must not be equal to UNKNOWN VALUE

Source Code

function _approve(
  address owner,
  address spender,
  uint256 amount
) internal virtual {
  require(owner != address(0), "ERC20: approve from the zero address");
  require(spender != address(0), "ERC20: approve to the zero address");

  _allowances[owner][spender] = amount;
  emit Approval(owner, spender, amount);
}

internal ERC20._setupDecimals

Parameters

Name	Type
decimals_	uint8

Properties

Visibility internal

Mutability transaction

Source Code

function _setupDecimals(uint8 decimals_) internal {
  _decimals = decimals_;
}

internal ERC20._beforeTokenTransfer

Parameters

Name	Type
from	address
to	address
amount	uint256

Properties

Visibility internal

Mutability transaction

Source Code

function _beforeTokenTransfer(
  address from,
  address to,
  uint256 amount
) internal virtual {}

internal Context._msgSender

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability view

Source Code

function _msgSender() internal view virtual returns (address payable) {
  return msg.sender;
}

internal Context._msgData

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability view

Source Code

function _msgData() internal view virtual returns (bytes memory) {
  this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
  return msg.data;
}

Graph Token

ERC20

About link description

Stats

Library Use

Events (6) 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.

NewOwnership Event

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

NewPendingOwnership 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.

Constants (5) keyboard_arrow_up

DOMAIN_TYPE_HASH Constant

DOMAIN_NAME_HASH Constant

DOMAIN_VERSION_HASH Constant

DOMAIN_SALT Constant

PERMIT_TYPEHASH Constant

State Variables (11) keyboard_arrow_up

governor Variable

pendingGovernor Variable

nonces Variable

DOMAIN_SEPARATOR Variable

_minters Variable

_balances Variable

_allowances Variable

_totalSupply Variable

_name Variable

_symbol Variable

_decimals Variable

Functions Expand All Collapse All

name 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

symbol 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

decimals 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

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

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.

About

Events (6)

Parameters

Parameters

Parameters

Parameters

Parameters

Parameters

Constants (5)

State Variables (11)

name

Parameters

symbol

Parameters

decimals

Parameters

totalSupply

Parameters

balanceOf

Parameters

transfer

Parameters

Requirements

allowance

Parameters

approve

Parameters

Requirements

transferFrom

Parameters

Requirements

increaseAllowance

Parameters

Requirements

decreaseAllowance

Parameters

Requirements

burn

Parameters

Requirements

burnFrom

Parameters

Requirements

transferOwnership

Parameters

Modifiers

Requirements

acceptOwnership

Parameters

Requirements

permit

Parameters

Requirements

addMinter

Parameters

Modifiers

removeMinter

Parameters

Modifiers

renounceMinter

Parameters

mint

Parameters

Modifiers

Requirements

isMinter

Parameters

internal GraphToken._addMinter

Parameters

internal GraphToken._removeMinter

Parameters