Victoria VR

0x7d5121505149065b562c789a0145ed750e6e8cdd Copy

ERC20

This contract is an ERC20 token.

Name Victoria VR

Symbol VR

Decimals 18

Total Supply 16,800,000,000 VR

About

Stats

Public Functions 22

Event Types 6

Code Size 43,786 bytes

Events (6)

Approval Event

Parameters

owner	address
spender	address
value	uint256

OwnershipTransferred Event

Parameters

previousOwner	address
newOwner	address

Paused Event

Parameters

account

address

Snapshot Event

Parameters

uint256

Transfer Event

Parameters

from	address
to	address
value	uint256

Unpaused Event

Parameters

account

address

State Variables (11)

_owner Variable

address

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

_paused Variable

bool

Internal Variable

_accountBalanceSnapshots Variable

mapping(address => Snapshots)

Internal Variable

_totalSupplySnapshots Variable

Snapshots

Internal Variable

_currentSnapshotId Variable

Counters.Counter

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;
}

balanceOfAt

Parameters

Name	Type
account	address
snapshotId	uint256

Properties

Visibility public

Mutability view

Source Code

function balanceOfAt(address account, uint256 snapshotId)
  public
  view
  returns (uint256)
{
  (bool snapshotted, uint256 value) = _valueAt(
    snapshotId,
    _accountBalanceSnapshots[account]
  );

  return snapshotted ? value : balanceOf(account);
}

totalSupplyAt

Parameters

Name	Type
snapshotId	uint256

Properties

Visibility public

Mutability view

Source Code

function totalSupplyAt(uint256 snapshotId) public view returns (uint256) {
  (bool snapshotted, uint256 value) = _valueAt(
    snapshotId,
    _totalSupplySnapshots
  );

  return snapshotted ? value : totalSupply();
}

paused

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

function paused() public view returns (bool) {
  return _paused;
}

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);
}

owner

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

function owner() public view returns (address) {
  return _owner;
}

renounceOwnership

Parameters

This function has no parameters.

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

_owner must be equal to the result of calling _msgSender

Source Code

function renounceOwnership() public virtual onlyOwner {
  emit OwnershipTransferred(_owner, address(0));
  _owner = address(0);
}

transferOwnership

Parameters

Name	Type
newOwner	address

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

_owner must be equal to the result of calling _msgSender

Requirements

newOwner must not be equal to UNKNOWN VALUE

Source Code

function transferOwnership(address newOwner) public virtual onlyOwner {
  require(newOwner != address(0), "Ownable: new owner is the zero address");
  emit OwnershipTransferred(_owner, newOwner);
  _owner = newOwner;
}

pause

Parameters

This function has no parameters.

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

_owner must be equal to the result of calling _msgSender

whenNotPaused checks for the following:

_paused must not be true

Source Code

function pause() public onlyOwner whenNotPaused {
  super._pause();
}

unpause

Parameters

This function has no parameters.

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

_owner must be equal to the result of calling _msgSender

whenPaused checks for the following:

_paused must be true

Source Code

function unpause() public onlyOwner whenPaused {
  super._unpause();
}

snapshot

Parameters

This function has no parameters.

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

_owner must be equal to the result of calling _msgSender

Source Code

function snapshot() public onlyOwner returns (uint256) {
  return super._snapshot();
}

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 VictoriaVR._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 override(ERC20, ERC20Pausable, ERC20Snapshot) {
  super._beforeTokenTransfer(from, to, amount);
}

internal Ownable.constructor

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability transaction

Source Code

constructor() internal {
  address msgSender = _msgSender();
  _owner = msgSender;
  emit OwnershipTransferred(address(0), msgSender);
}

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

account 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 ERC20Pausable._beforeTokenTransfer

Parameters

Name	Type
from	address
to	address
amount	uint256

Properties

Visibility internal

Mutability transaction

Requirements

the result of calling paused must not be true

Source Code

function _beforeTokenTransfer(
  address from,
  address to,
  uint256 amount
) internal virtual override {
  super._beforeTokenTransfer(from, to, amount);

  require(!paused(), "ERC20Pausable: token transfer while paused");
}

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

account 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 Pausable.constructor

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability transaction

Source Code

constructor() internal {
  _paused = false;
}

internal Pausable._pause

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability transaction

Modifiers

whenNotPaused checks for the following:

_paused must not be true

Source Code

function _pause() internal virtual whenNotPaused {
  _paused = true;
  emit Paused(_msgSender());
}

internal Pausable._unpause

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability transaction

Modifiers

whenPaused checks for the following:

_paused must be true

Source Code

function _unpause() internal virtual whenPaused {
  _paused = false;
  emit Unpaused(_msgSender());
}

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 ERC20Snapshot._snapshot

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability transaction

Source Code

function _snapshot() internal virtual returns (uint256) {
  _currentSnapshotId.increment();

  uint256 currentId = _currentSnapshotId.current();
  emit Snapshot(currentId);
  return currentId;
}

internal ERC20Snapshot._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 override {
  super._beforeTokenTransfer(from, to, amount);

  if (from == address(0)) {
    // mint
    _updateAccountSnapshot(to);
    _updateTotalSupplySnapshot();
  } else if (to == address(0)) {
    // burn
    _updateAccountSnapshot(from);
    _updateTotalSupplySnapshot();
  } else {
    // transfer
    _updateAccountSnapshot(from);
    _updateAccountSnapshot(to);
  }
}

internal ERC20Snapshot._valueAt

Parameters

Name	Type
snapshotId	uint256
snapshots	Snapshots

Properties

Visibility private

Mutability view

Requirements

snapshotId must be greater than 0

snapshotId must be less than or equal to UNKNOWN VALUE

Source Code

function _valueAt(uint256 snapshotId, Snapshots storage snapshots)
  private
  view
  returns (bool, uint256)
{
  require(snapshotId > 0, "ERC20Snapshot: id is 0");
  // solhint-disable-next-line max-line-length
  require(
    snapshotId <= _currentSnapshotId.current(),
    "ERC20Snapshot: nonexistent id"
  );

  // When a valid snapshot is queried, there are three possibilities:
  //  a) The queried value was not modified after the snapshot was taken. Therefore, a snapshot entry was never
  //  created for this id, and all stored snapshot ids are smaller than the requested one. The value that corresponds
  //  to this id is the current one.
  //  b) The queried value was modified after the snapshot was taken. Therefore, there will be an entry with the
  //  requested id, and its value is the one to return.
  //  c) More snapshots were created after the requested one, and the queried value was later modified. There will be
  //  no entry for the requested id: the value that corresponds to it is that of the smallest snapshot id that is
  //  larger than the requested one.
  //
  // In summary, we need to find an element in an array, returning the index of the smallest value that is larger if
  // it is not found, unless said value doesn't exist (e.g. when all values are smaller). Arrays.findUpperBound does
  // exactly this.

  uint256 index = snapshots.ids.findUpperBound(snapshotId);

  if (index == snapshots.ids.length) {
    return (false, 0);
  } else {
    return (true, snapshots.values[index]);
  }
}

internal ERC20Snapshot._updateAccountSnapshot

Parameters

Name	Type
account	address

Properties

Visibility private

Mutability transaction

Source Code

function _updateAccountSnapshot(address account) private {
  _updateSnapshot(_accountBalanceSnapshots[account], balanceOf(account));
}

internal ERC20Snapshot._updateTotalSupplySnapshot

Parameters

This function has no parameters.

Properties

Visibility private

Mutability transaction

Source Code

function _updateTotalSupplySnapshot() private {
  _updateSnapshot(_totalSupplySnapshots, totalSupply());
}

internal ERC20Snapshot._updateSnapshot

Parameters

Name	Type
snapshots	Snapshots
currentValue	uint256

Properties

Visibility private

Mutability transaction

Source Code

function _updateSnapshot(Snapshots storage snapshots, uint256 currentValue)
  private
{
  uint256 currentId = _currentSnapshotId.current();
  if (_lastSnapshotId(snapshots.ids) < currentId) {
    snapshots.ids.push(currentId);
    snapshots.values.push(currentValue);
  }
}

internal ERC20Snapshot._lastSnapshotId

Parameters

Name	Type
ids	uint256[]

Properties

Visibility private

Mutability view

Source Code

function _lastSnapshotId(uint256[] storage ids) private view returns (uint256) {
  if (ids.length == 0) {
    return 0;
  } else {
    return ids[ids.length - 1];
  }
}

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

account 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;
}

Victoria VR

ERC20

About

Stats

Events (6) keyboard_arrow_up

Approval Event

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

OwnershipTransferred Event

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

Paused Event

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

Snapshot 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.

Unpaused Event

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

State Variables (11) keyboard_arrow_up

_owner Variable

_balances Variable

_allowances Variable

_totalSupply Variable

_name Variable

_symbol Variable

_decimals Variable

_paused Variable

_accountBalanceSnapshots Variable

_totalSupplySnapshots Variable

_currentSnapshotId 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.

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

balanceOfAt keyboard_arrow_up

Events (6)

Parameters

Parameters

Parameters

Parameters

Parameters

Parameters

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

balanceOfAt

Parameters

totalSupplyAt

Parameters

paused

Parameters

burn

Parameters

Requirements

burnFrom

Parameters

Requirements

owner

Parameters

renounceOwnership

Parameters

Modifiers

transferOwnership

Parameters

Modifiers

Requirements

pause

Parameters

Modifiers

unpause

Parameters

Modifiers

snapshot

Parameters

Modifiers

internal VictoriaVR._beforeTokenTransfer

Parameters

internal Ownable.constructor

Parameters

internal Context._msgSender

Parameters