MyCryptoHeroes:Hero

0x273f7f8e6489682df756151f5525576e322d51a3 Copy

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Public Functions 33

Event Types 10

Code Size 36,347 bytes

Events (10)

Approval Event

Parameters

owner	address
approved	address
tokenId	uint256

ApprovalForAll Event

Parameters

owner	address
operator	address
approved	bool

MinterAdded Event

Parameters

account

address

MinterRemoved Event

Parameters

account

address

MintingFinished Event

Parameters

Paused Event

Parameters

PauserAdded Event

Parameters

account

address

PauserRemoved Event

Parameters

account

address

Transfer Event

Parameters

from	address
to	address
tokenId	uint256

Unpaused Event

Parameters

Constants (6)

HERO_TYPE_OFFSET Constant

uint16

10000

_ERC721_RECEIVED Constant

bytes4

0x150b7a02

_InterfaceId_ERC721 Constant

bytes4

0x80ac58cd

_InterfaceId_ERC165 Constant

bytes4

0x01ffc9a7

_InterfaceId_ERC721Enumerable Constant

bytes4

0x780e9d63

InterfaceId_ERC721Metadata Constant

bytes4

0x5b5e139f

State Variables (18)

tokenURIPrefix Variable

string

heroTypeToSupplyLimit Variable

mapping(uint16 => uint16)

Internal Variable

_mintingFinished Variable

bool

Internal Variable

_tokenOwner Variable

mapping(uint256 => address)

Internal Variable

_tokenApprovals Variable

mapping(uint256 => address)

Internal Variable

_ownedTokensCount Variable

mapping(address => uint256)

Internal Variable

_operatorApprovals Variable

mapping(address => mapping(address => bool))

Internal Variable

_supportedInterfaces Variable

mapping(bytes4 => bool)

Internal Variable

_ownedTokens Variable

mapping(address => uint256[])

Internal Variable

_ownedTokensIndex Variable

mapping(uint256 => uint256)

Internal Variable

_allTokens Variable

uint256[]

Internal Variable

_allTokensIndex Variable

mapping(uint256 => uint256)

Internal Variable

_name Variable

string

Internal Variable

_symbol Variable

string

Internal Variable

_tokenURIs Variable

mapping(uint256 => string)

Internal Variable

minters Variable

Roles.Role

Internal Variable

_paused Variable

bool

Internal Variable

pausers Variable

Roles.Role

Internal Variable

Functions Expand All Collapse All

isPauser

Parameters

Name	Type
account	address

Properties

Visibility public

Mutability view

Source Code

function isPauser(address account) public view returns (bool) {
  return pausers.has(account);
}

addPauser

Parameters

Name	Type
account	address

Properties

Visibility public

Mutability transaction

Modifiers

onlyPauser checks for the following:

null

Source Code

function addPauser(address account) public onlyPauser {
  pausers.add(account);
  emit PauserAdded(account);
}

renouncePauser

Parameters

This function has no parameters.

Properties

Visibility public

Mutability transaction

Source Code

function renouncePauser() public {
  pausers.remove(msg.sender);
}

paused

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

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

pause

Parameters

This function has no parameters.

Properties

Visibility public

Mutability transaction

Modifiers

onlyPauser checks for the following:

null

whenNotPaused checks for the following:

_paused must not be true

Source Code

function pause() public onlyPauser whenNotPaused {
  _paused = true;
  emit Paused();
}

unpause

Parameters

This function has no parameters.

Properties

Visibility public

Mutability transaction

Modifiers

onlyPauser checks for the following:

null

whenPaused checks for the following:

_paused must be true

Source Code

function unpause() public onlyPauser whenPaused {
  _paused = false;
  emit Unpaused();
}

balanceOf

Parameters

Name	Type
owner	address

Properties

Visibility public

Mutability view

Requirements

owner must not be equal to UNKNOWN VALUE

Source Code

function balanceOf(address owner) public view returns (uint256) {
  require(owner != address(0));
  return _ownedTokensCount[owner];
}

ownerOf

Parameters

Name	Type
tokenId	uint256

Properties

Visibility public

Mutability view

Requirements

owner must not be equal to UNKNOWN VALUE

Source Code

function ownerOf(uint256 tokenId) public view returns (address) {
  address owner = _tokenOwner[tokenId];
  require(owner != address(0));
  return owner;
}

approve

Parameters

Name	Type
to	address
tokenId	uint256

Properties

Visibility public

Mutability transaction

Modifiers

whenNotPaused checks for the following:

_paused must not be true

Requirements

to must not be equal to owner

One or more of the following: -null - OR owner must be equal to the sender's address

Source Code

function approve(address to, uint256 tokenId) public whenNotPaused {
  super.approve(to, tokenId);
}

getApproved

Parameters

Name	Type
tokenId	uint256

Properties

Visibility public

Mutability view

Requirements

null

Source Code

function getApproved(uint256 tokenId) public view returns (address) {
  require(_exists(tokenId));
  return _tokenApprovals[tokenId];
}

setApprovalForAll

Parameters

Name	Type
to	address
approved	bool

Properties

Visibility public

Mutability transaction

Modifiers

whenNotPaused checks for the following:

_paused must not be true

Requirements

to must not be equal to the sender's address

Source Code

function setApprovalForAll(address to, bool approved) public whenNotPaused {
  super.setApprovalForAll(to, approved);
}

isApprovedForAll

Parameters

Name	Type
owner	address
operator	address

Properties

Visibility public

Mutability view

Source Code

function isApprovedForAll(address owner, address operator)
  public
  view
  returns (bool)
{
  return _operatorApprovals[owner][operator];
}

transferFrom

Parameters

Name	Type
from	address
to	address
tokenId	uint256

Properties

Visibility public

Mutability transaction

Modifiers

whenNotPaused checks for the following:

_paused must not be true

Requirements

null

to must not be equal to UNKNOWN VALUE

from must be equal to the result of calling ownerOf with tokenId

_tokenOwner for tokenId must be equal to UNKNOWN VALUE

Source Code

function transferFrom(
  address from,
  address to,
  uint256 tokenId
) public whenNotPaused {
  super.transferFrom(from, to, tokenId);
}

safeTransferFrom

Parameters

Name	Type
from	address
to	address
tokenId	uint256

Properties

Visibility public

Mutability transaction

Requirements

null

to must not be equal to UNKNOWN VALUE

from must be equal to the result of calling ownerOf with tokenId

_tokenOwner for tokenId must be equal to UNKNOWN VALUE

null

Source Code

function safeTransferFrom(
  address from,
  address to,
  uint256 tokenId
) public {
  // solium-disable-next-line arg-overflow
  safeTransferFrom(from, to, tokenId, "");
}

safeTransferFrom

Parameters

Name	Type
from	address
to	address
tokenId	uint256
_data	bytes

Properties

Visibility public

Mutability transaction

Requirements

null

to must not be equal to UNKNOWN VALUE

from must be equal to the result of calling ownerOf with tokenId

_tokenOwner for tokenId must be equal to UNKNOWN VALUE

null

Source Code

function safeTransferFrom(
  address from,
  address to,
  uint256 tokenId,
  bytes _data
) public {
  transferFrom(from, to, tokenId);
  // solium-disable-next-line arg-overflow
  require(_checkAndCallSafeTransfer(from, to, tokenId, _data));
}

supportsInterface

Parameters

Name	Type
interfaceId	bytes4

Properties

Visibility public

Mutability view

Source Code

function supportsInterface(bytes4 interfaceId) external view returns (bool) {
  return _supportedInterfaces[interfaceId];
}

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 {
  minters.add(account);
  emit MinterAdded(account);
}

renounceMinter

Parameters

This function has no parameters.

Properties

Visibility public

Mutability transaction

Source Code

function renounceMinter() public {
  minters.remove(msg.sender);
}

name

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

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

symbol

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

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

tokenURI

Parameters

Name	Type
tokenId	uint256

Properties

Visibility public

Mutability view

Source Code

function tokenURI(uint256 tokenId) public view returns (string) {
  bytes32 tokenIdBytes;
  if (tokenId == 0) {
    tokenIdBytes = "0";
  } else {
    uint256 value = tokenId;
    while (value > 0) {
      tokenIdBytes = bytes32(uint256(tokenIdBytes) / (2**8));
      tokenIdBytes |= bytes32(((value % 10) + 48) * 2**(8 * 31));
      value /= 10;
    }
  }

  bytes memory prefixBytes = bytes(tokenURIPrefix);
  bytes memory tokenURIBytes = new bytes(
    prefixBytes.length + tokenIdBytes.length
  );

  uint8 i;
  uint8 index = 0;

  for (i = 0; i < prefixBytes.length; i++) {
    tokenURIBytes[index] = prefixBytes[i];
    index++;
  }

  for (i = 0; i < tokenIdBytes.length; i++) {
    tokenURIBytes[index] = tokenIdBytes[i];
    index++;
  }

  return string(tokenURIBytes);
}

totalSupply

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

function totalSupply() public view returns (uint256) {
  return _allTokens.length;
}

tokenOfOwnerByIndex

Parameters

Name	Type
owner	address
index	uint256

Properties

Visibility public

Mutability view

Requirements

index must be less than the result of calling balanceOf with owner

Source Code

function tokenOfOwnerByIndex(address owner, uint256 index)
  public
  view
  returns (uint256)
{
  require(index < balanceOf(owner));
  return _ownedTokens[owner][index];
}

tokenByIndex

Parameters

Name	Type
index	uint256

Properties

Visibility public

Mutability view

Requirements

index must be less than the result of calling totalSupply

Source Code

function tokenByIndex(uint256 index) public view returns (uint256) {
  require(index < totalSupply());
  return _allTokens[index];
}

mintingFinished

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

function mintingFinished() public view returns (bool) {
  return _mintingFinished;
}

mint

Parameters

Name	Type
to	address
tokenId	uint256

Properties

Visibility public

Mutability transaction

Modifiers

onlyMinter checks for the following:

null

onlyBeforeMintingFinished checks for the following:

_mintingFinished must not be true

Requirements

to must not be equal to UNKNOWN VALUE

_tokenOwner for tokenId must be equal to UNKNOWN VALUE

Source Code

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

mintWithTokenURI

Parameters

Name	Type
to	address
tokenId	uint256
tokenURI	string

Properties

Visibility public

Mutability transaction

Modifiers

onlyMinter checks for the following:

null

onlyBeforeMintingFinished checks for the following:

_mintingFinished must not be true

Requirements

to must not be equal to UNKNOWN VALUE

_tokenOwner for tokenId must be equal to UNKNOWN VALUE

null

Source Code

function mintWithTokenURI(
  address to,
  uint256 tokenId,
  string tokenURI
) public onlyMinter onlyBeforeMintingFinished returns (bool) {
  mint(to, tokenId);
  _setTokenURI(tokenId, tokenURI);
  return true;
}

finishMinting

Parameters

This function has no parameters.

Properties

Visibility public

Mutability transaction

Modifiers

onlyMinter checks for the following:

null

onlyBeforeMintingFinished checks for the following:

_mintingFinished must not be true

Source Code

function finishMinting()
  public
  onlyMinter
  onlyBeforeMintingFinished
  returns (bool)
{
  _mintingFinished = true;
  emit MintingFinished();
  return true;
}

setSupplyLimit

Parameters

Name	Type
_heroType	uint16
_supplyLimit	uint16

Properties

Visibility public

Mutability transaction

Modifiers

onlyMinter checks for the following:

null

Requirements

One or more of the following: - _supplyLimit must be less than heroTypeToSupplyLimit for _heroType - OR heroTypeToSupplyLimit for _heroType must be equal to 0

Source Code

function setSupplyLimit(uint16 _heroType, uint16 _supplyLimit)
  external
  onlyMinter
{
  require(
    heroTypeToSupplyLimit[_heroType] == 0 ||
      _supplyLimit < heroTypeToSupplyLimit[_heroType],
    "_supplyLimit is bigger"
  );
  heroTypeToSupplyLimit[_heroType] = _supplyLimit;
}

setTokenURIPrefix

Parameters

Name	Type
_tokenURIPrefix	string

Properties

Visibility public

Mutability transaction

Modifiers

onlyMinter checks for the following:

null

Source Code

function setTokenURIPrefix(string _tokenURIPrefix) external onlyMinter {
  tokenURIPrefix = _tokenURIPrefix;
}

getSupplyLimit

Parameters

Name	Type
_heroType	uint16

Properties

Visibility public

Mutability view

Source Code

function getSupplyLimit(uint16 _heroType) public view returns (uint16) {
  return heroTypeToSupplyLimit[_heroType];
}

mintHeroAsset

Parameters

Name	Type
_owner	address
_tokenId	uint256

Properties

Visibility public

Mutability transaction

Modifiers

onlyMinter checks for the following:

null

Requirements

_heroTypeIndex must be less than heroTypeToSupplyLimit for _heroType

to must not be equal to UNKNOWN VALUE

_tokenOwner for tokenId must be equal to UNKNOWN VALUE

Source Code

function mintHeroAsset(address _owner, uint256 _tokenId) public onlyMinter {
  uint16 _heroType = uint16(_tokenId / HERO_TYPE_OFFSET);
  uint16 _heroTypeIndex = uint16(_tokenId % HERO_TYPE_OFFSET) - 1;
  require(_heroTypeIndex < heroTypeToSupplyLimit[_heroType], "supply over");
  _mint(_owner, _tokenId);
}

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 ERC721._exists

Parameters

Name	Type
tokenId	uint256

Properties

Visibility internal

Mutability view

Source Code

function _exists(uint256 tokenId) internal view returns (bool) {
  address owner = _tokenOwner[tokenId];
  return owner != address(0);
}

internal ERC721._isApprovedOrOwner

Parameters

Name	Type
spender	address
tokenId	uint256

Properties

Visibility internal

Mutability view

Source Code

function _isApprovedOrOwner(address spender, uint256 tokenId)
  internal
  view
  returns (bool)
{
  address owner = ownerOf(tokenId);
  // Disable solium check because of
  // https://github.com/duaraghav8/Solium/issues/175
  // solium-disable-next-line operator-whitespace
  return (spender == owner ||
    getApproved(tokenId) == spender ||
    isApprovedForAll(owner, spender));
}

internal ERC721._mint

Parameters

Name	Type
to	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

to must not be equal to UNKNOWN VALUE

_tokenOwner for tokenId must be equal to UNKNOWN VALUE

Source Code

function _mint(address to, uint256 tokenId) internal {
  require(to != address(0));
  _addTokenTo(to, tokenId);
  emit Transfer(address(0), to, tokenId);
}

internal ERC721._burn

Parameters

Name	Type
owner	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

from must be equal to the result of calling ownerOf with tokenId

owner must be equal to the result of calling ownerOf with tokenId

Source Code

function _burn(address owner, uint256 tokenId) internal {
  _clearApproval(owner, tokenId);
  _removeTokenFrom(owner, tokenId);
  emit Transfer(owner, address(0), tokenId);
}

internal ERC721._clearApproval

Parameters

Name	Type
owner	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

from must be equal to the result of calling ownerOf with tokenId

Source Code

function _clearApproval(address owner, uint256 tokenId) internal {
  require(ownerOf(tokenId) == owner);
  if (_tokenApprovals[tokenId] != address(0)) {
    _tokenApprovals[tokenId] = address(0);
  }
}

internal ERC721._addTokenTo

Parameters

Name	Type
to	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

_tokenOwner for tokenId must be equal to UNKNOWN VALUE

Source Code

function _addTokenTo(address to, uint256 tokenId) internal {
  require(_tokenOwner[tokenId] == address(0));
  _tokenOwner[tokenId] = to;
  _ownedTokensCount[to] = _ownedTokensCount[to].add(1);
}

internal ERC721._removeTokenFrom

Parameters

Name	Type
from	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

owner must be equal to the result of calling ownerOf with tokenId

Source Code

function _removeTokenFrom(address from, uint256 tokenId) internal {
  require(ownerOf(tokenId) == from);
  _ownedTokensCount[from] = _ownedTokensCount[from].sub(1);
  _tokenOwner[tokenId] = address(0);
}

internal ERC721._checkAndCallSafeTransfer

Parameters

Name	Type
from	address
to	address
tokenId	uint256
_data	bytes

Properties

Visibility internal

Mutability transaction

Source Code

function _checkAndCallSafeTransfer(
  address from,
  address to,
  uint256 tokenId,
  bytes _data
) internal returns (bool) {
  if (!to.isContract()) {
    return true;
  }
  bytes4 retval = IERC721Receiver(to).onERC721Received(
    msg.sender,
    from,
    tokenId,
    _data
  );
  return (retval == _ERC721_RECEIVED);
}

internal ERC165._registerInterface

Parameters

Name	Type
interfaceId	bytes4

Properties

Visibility internal

Mutability transaction

Requirements

interfaceId must not be equal to 0xffffffff

Source Code

function _registerInterface(bytes4 interfaceId) internal {
  require(interfaceId != 0xffffffff);
  _supportedInterfaces[interfaceId] = true;
}

internal ERC721Enumerable._addTokenTo

Parameters

Name	Type
to	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

_tokenOwner for tokenId must be equal to UNKNOWN VALUE

Source Code

function _addTokenTo(address to, uint256 tokenId) internal {
  super._addTokenTo(to, tokenId);
  uint256 length = _ownedTokens[to].length;
  _ownedTokens[to].push(tokenId);
  _ownedTokensIndex[tokenId] = length;
}

internal ERC721Enumerable._removeTokenFrom

Parameters

Name	Type
from	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

owner must be equal to the result of calling ownerOf with tokenId

Source Code

function _removeTokenFrom(address from, uint256 tokenId) internal {
  super._removeTokenFrom(from, tokenId);

  // To prevent a gap in the array, we store the last token in the index of the token to delete, and
  // then delete the last slot.
  uint256 tokenIndex = _ownedTokensIndex[tokenId];
  uint256 lastTokenIndex = _ownedTokens[from].length.sub(1);
  uint256 lastToken = _ownedTokens[from][lastTokenIndex];

  _ownedTokens[from][tokenIndex] = lastToken;
  // This also deletes the contents at the last position of the array
  _ownedTokens[from].length--;

  // Note that this will handle single-element arrays. In that case, both tokenIndex and lastTokenIndex are going to
  // be zero. Then we can make sure that we will remove tokenId from the ownedTokens list since we are first swapping
  // the lastToken to the first position, and then dropping the element placed in the last position of the list

  _ownedTokensIndex[tokenId] = 0;
  _ownedTokensIndex[lastToken] = tokenIndex;
}

internal ERC721Enumerable._mint

Parameters

Name	Type
to	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

to must not be equal to UNKNOWN VALUE

_tokenOwner for tokenId must be equal to UNKNOWN VALUE

Source Code

function _mint(address to, uint256 tokenId) internal {
  super._mint(to, tokenId);

  _allTokensIndex[tokenId] = _allTokens.length;
  _allTokens.push(tokenId);
}

internal ERC721Enumerable._burn

Parameters

Name	Type
owner	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

from must be equal to the result of calling ownerOf with tokenId

owner must be equal to the result of calling ownerOf with tokenId

Source Code

function _burn(address owner, uint256 tokenId) internal {
  super._burn(owner, tokenId);

  // Reorg all tokens array
  uint256 tokenIndex = _allTokensIndex[tokenId];
  uint256 lastTokenIndex = _allTokens.length.sub(1);
  uint256 lastToken = _allTokens[lastTokenIndex];

  _allTokens[tokenIndex] = lastToken;
  _allTokens[lastTokenIndex] = 0;

  _allTokens.length--;
  _allTokensIndex[tokenId] = 0;
  _allTokensIndex[lastToken] = tokenIndex;
}

internal ERC165._registerInterface

Parameters

Name	Type
interfaceId	bytes4

Properties

Visibility internal

Mutability transaction

Requirements

interfaceId must not be equal to 0xffffffff

Source Code

function _registerInterface(bytes4 interfaceId) internal {
  require(interfaceId != 0xffffffff);
  _supportedInterfaces[interfaceId] = true;
}

internal ERC721._exists

Parameters

Name	Type
tokenId	uint256

Properties

Visibility internal

Mutability view

Source Code

function _exists(uint256 tokenId) internal view returns (bool) {
  address owner = _tokenOwner[tokenId];
  return owner != address(0);
}

internal ERC721._isApprovedOrOwner

Parameters

Name	Type
spender	address
tokenId	uint256

Properties

Visibility internal

Mutability view

Source Code

function _isApprovedOrOwner(address spender, uint256 tokenId)
  internal
  view
  returns (bool)
{
  address owner = ownerOf(tokenId);
  // Disable solium check because of
  // https://github.com/duaraghav8/Solium/issues/175
  // solium-disable-next-line operator-whitespace
  return (spender == owner ||
    getApproved(tokenId) == spender ||
    isApprovedForAll(owner, spender));
}

internal ERC721._mint

Parameters

Name	Type
to	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

to must not be equal to UNKNOWN VALUE

_tokenOwner for tokenId must be equal to UNKNOWN VALUE

Source Code

function _mint(address to, uint256 tokenId) internal {
  require(to != address(0));
  _addTokenTo(to, tokenId);
  emit Transfer(address(0), to, tokenId);
}

internal ERC721._burn

Parameters

Name	Type
owner	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

from must be equal to the result of calling ownerOf with tokenId

owner must be equal to the result of calling ownerOf with tokenId

Source Code

function _burn(address owner, uint256 tokenId) internal {
  _clearApproval(owner, tokenId);
  _removeTokenFrom(owner, tokenId);
  emit Transfer(owner, address(0), tokenId);
}

internal ERC721._clearApproval

Parameters

Name	Type
owner	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

from must be equal to the result of calling ownerOf with tokenId

Source Code

function _clearApproval(address owner, uint256 tokenId) internal {
  require(ownerOf(tokenId) == owner);
  if (_tokenApprovals[tokenId] != address(0)) {
    _tokenApprovals[tokenId] = address(0);
  }
}

internal ERC721._addTokenTo

Parameters

Name	Type
to	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

_tokenOwner for tokenId must be equal to UNKNOWN VALUE

Source Code

function _addTokenTo(address to, uint256 tokenId) internal {
  require(_tokenOwner[tokenId] == address(0));
  _tokenOwner[tokenId] = to;
  _ownedTokensCount[to] = _ownedTokensCount[to].add(1);
}

internal ERC721._removeTokenFrom

Parameters

Name	Type
from	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

owner must be equal to the result of calling ownerOf with tokenId

Source Code

function _removeTokenFrom(address from, uint256 tokenId) internal {
  require(ownerOf(tokenId) == from);
  _ownedTokensCount[from] = _ownedTokensCount[from].sub(1);
  _tokenOwner[tokenId] = address(0);
}

internal ERC721._checkAndCallSafeTransfer

Parameters

Name	Type
from	address
to	address
tokenId	uint256
_data	bytes

Properties

Visibility internal

Mutability transaction

Source Code

function _checkAndCallSafeTransfer(
  address from,
  address to,
  uint256 tokenId,
  bytes _data
) internal returns (bool) {
  if (!to.isContract()) {
    return true;
  }
  bytes4 retval = IERC721Receiver(to).onERC721Received(
    msg.sender,
    from,
    tokenId,
    _data
  );
  return (retval == _ERC721_RECEIVED);
}

internal ERC165._registerInterface

Parameters

Name	Type
interfaceId	bytes4

Properties

Visibility internal

Mutability transaction

Requirements

interfaceId must not be equal to 0xffffffff

Source Code

function _registerInterface(bytes4 interfaceId) internal {
  require(interfaceId != 0xffffffff);
  _supportedInterfaces[interfaceId] = true;
}

internal ERC721Metadata._setTokenURI

Parameters

Name	Type
tokenId	uint256
uri	string

Properties

Visibility internal

Mutability transaction

Requirements

null

Source Code

function _setTokenURI(uint256 tokenId, string uri) internal {
  require(_exists(tokenId));
  _tokenURIs[tokenId] = uri;
}

internal ERC721Metadata._burn

Parameters

Name	Type
owner	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

from must be equal to the result of calling ownerOf with tokenId

owner must be equal to the result of calling ownerOf with tokenId

Source Code

function _burn(address owner, uint256 tokenId) internal {
  super._burn(owner, tokenId);

  // Clear metadata (if any)
  if (bytes(_tokenURIs[tokenId]).length != 0) {
    delete _tokenURIs[tokenId];
  }
}

internal ERC165._registerInterface

Parameters

Name	Type
interfaceId	bytes4

Properties

Visibility internal

Mutability transaction

Requirements

interfaceId must not be equal to 0xffffffff

Source Code

function _registerInterface(bytes4 interfaceId) internal {
  require(interfaceId != 0xffffffff);
  _supportedInterfaces[interfaceId] = true;
}

internal ERC721._exists

Parameters

Name	Type
tokenId	uint256

Properties

Visibility internal

Mutability view

Source Code

function _exists(uint256 tokenId) internal view returns (bool) {
  address owner = _tokenOwner[tokenId];
  return owner != address(0);
}

internal ERC721._isApprovedOrOwner

Parameters

Name	Type
spender	address
tokenId	uint256

Properties

Visibility internal

Mutability view

Source Code

function _isApprovedOrOwner(address spender, uint256 tokenId)
  internal
  view
  returns (bool)
{
  address owner = ownerOf(tokenId);
  // Disable solium check because of
  // https://github.com/duaraghav8/Solium/issues/175
  // solium-disable-next-line operator-whitespace
  return (spender == owner ||
    getApproved(tokenId) == spender ||
    isApprovedForAll(owner, spender));
}

internal ERC721._mint

Parameters

Name	Type
to	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

to must not be equal to UNKNOWN VALUE

_tokenOwner for tokenId must be equal to UNKNOWN VALUE

Source Code

function _mint(address to, uint256 tokenId) internal {
  require(to != address(0));
  _addTokenTo(to, tokenId);
  emit Transfer(address(0), to, tokenId);
}

internal ERC721._burn

Parameters

Name	Type
owner	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

from must be equal to the result of calling ownerOf with tokenId

owner must be equal to the result of calling ownerOf with tokenId

Source Code

function _burn(address owner, uint256 tokenId) internal {
  _clearApproval(owner, tokenId);
  _removeTokenFrom(owner, tokenId);
  emit Transfer(owner, address(0), tokenId);
}

internal ERC721._clearApproval

Parameters

Name	Type
owner	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

from must be equal to the result of calling ownerOf with tokenId

Source Code

function _clearApproval(address owner, uint256 tokenId) internal {
  require(ownerOf(tokenId) == owner);
  if (_tokenApprovals[tokenId] != address(0)) {
    _tokenApprovals[tokenId] = address(0);
  }
}

internal ERC721._addTokenTo

Parameters

Name	Type
to	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

_tokenOwner for tokenId must be equal to UNKNOWN VALUE

Source Code

function _addTokenTo(address to, uint256 tokenId) internal {
  require(_tokenOwner[tokenId] == address(0));
  _tokenOwner[tokenId] = to;
  _ownedTokensCount[to] = _ownedTokensCount[to].add(1);
}

internal ERC721._removeTokenFrom

Parameters

Name	Type
from	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

owner must be equal to the result of calling ownerOf with tokenId

Source Code

function _removeTokenFrom(address from, uint256 tokenId) internal {
  require(ownerOf(tokenId) == from);
  _ownedTokensCount[from] = _ownedTokensCount[from].sub(1);
  _tokenOwner[tokenId] = address(0);
}

internal ERC721._checkAndCallSafeTransfer

Parameters

Name	Type
from	address
to	address
tokenId	uint256
_data	bytes

Properties

Visibility internal

Mutability transaction

Source Code

function _checkAndCallSafeTransfer(
  address from,
  address to,
  uint256 tokenId,
  bytes _data
) internal returns (bool) {
  if (!to.isContract()) {
    return true;
  }
  bytes4 retval = IERC721Receiver(to).onERC721Received(
    msg.sender,
    from,
    tokenId,
    _data
  );
  return (retval == _ERC721_RECEIVED);
}

internal ERC165._registerInterface

Parameters

Name	Type
interfaceId	bytes4

Properties

Visibility internal

Mutability transaction

Requirements

interfaceId must not be equal to 0xffffffff

Source Code

function _registerInterface(bytes4 interfaceId) internal {
  require(interfaceId != 0xffffffff);
  _supportedInterfaces[interfaceId] = true;
}

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 ERC721._exists

Parameters

Name	Type
tokenId	uint256

Properties

Visibility internal

Mutability view

Source Code

function _exists(uint256 tokenId) internal view returns (bool) {
  address owner = _tokenOwner[tokenId];
  return owner != address(0);
}

internal ERC721._isApprovedOrOwner

Parameters

Name	Type
spender	address
tokenId	uint256

Properties

Visibility internal

Mutability view

Source Code

function _isApprovedOrOwner(address spender, uint256 tokenId)
  internal
  view
  returns (bool)
{
  address owner = ownerOf(tokenId);
  // Disable solium check because of
  // https://github.com/duaraghav8/Solium/issues/175
  // solium-disable-next-line operator-whitespace
  return (spender == owner ||
    getApproved(tokenId) == spender ||
    isApprovedForAll(owner, spender));
}

internal ERC721._mint

Parameters

Name	Type
to	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

to must not be equal to UNKNOWN VALUE

_tokenOwner for tokenId must be equal to UNKNOWN VALUE

Source Code

function _mint(address to, uint256 tokenId) internal {
  require(to != address(0));
  _addTokenTo(to, tokenId);
  emit Transfer(address(0), to, tokenId);
}

internal ERC721._burn

Parameters

Name	Type
owner	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

from must be equal to the result of calling ownerOf with tokenId

owner must be equal to the result of calling ownerOf with tokenId

Source Code

function _burn(address owner, uint256 tokenId) internal {
  _clearApproval(owner, tokenId);
  _removeTokenFrom(owner, tokenId);
  emit Transfer(owner, address(0), tokenId);
}

internal ERC721._clearApproval

Parameters

Name	Type
owner	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

from must be equal to the result of calling ownerOf with tokenId

Source Code

function _clearApproval(address owner, uint256 tokenId) internal {
  require(ownerOf(tokenId) == owner);
  if (_tokenApprovals[tokenId] != address(0)) {
    _tokenApprovals[tokenId] = address(0);
  }
}

internal ERC721._addTokenTo

Parameters

Name	Type
to	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

_tokenOwner for tokenId must be equal to UNKNOWN VALUE

Source Code

function _addTokenTo(address to, uint256 tokenId) internal {
  require(_tokenOwner[tokenId] == address(0));
  _tokenOwner[tokenId] = to;
  _ownedTokensCount[to] = _ownedTokensCount[to].add(1);
}

internal ERC721._removeTokenFrom

Parameters

Name	Type
from	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

owner must be equal to the result of calling ownerOf with tokenId

Source Code

function _removeTokenFrom(address from, uint256 tokenId) internal {
  require(ownerOf(tokenId) == from);
  _ownedTokensCount[from] = _ownedTokensCount[from].sub(1);
  _tokenOwner[tokenId] = address(0);
}

internal ERC721._checkAndCallSafeTransfer

Parameters

Name	Type
from	address
to	address
tokenId	uint256
_data	bytes

Properties

Visibility internal

Mutability transaction

Source Code

function _checkAndCallSafeTransfer(
  address from,
  address to,
  uint256 tokenId,
  bytes _data
) internal returns (bool) {
  if (!to.isContract()) {
    return true;
  }
  bytes4 retval = IERC721Receiver(to).onERC721Received(
    msg.sender,
    from,
    tokenId,
    _data
  );
  return (retval == _ERC721_RECEIVED);
}

internal ERC165._registerInterface

Parameters

Name	Type
interfaceId	bytes4

Properties

Visibility internal

Mutability transaction

Requirements

interfaceId must not be equal to 0xffffffff

Source Code

function _registerInterface(bytes4 interfaceId) internal {
  require(interfaceId != 0xffffffff);
  _supportedInterfaces[interfaceId] = true;
}

internal PauserRole._removePauser

Parameters

Name	Type
account	address

Properties

Visibility internal

Mutability transaction

Source Code

function _removePauser(address account) internal {
  pausers.remove(account);
  emit PauserRemoved(account);
}

MyCryptoHeroes:Hero

About

Stats

Events (10) keyboard_arrow_up

Approval Event

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

ApprovalForAll 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.

MintingFinished 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.

PauserAdded Event

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

PauserRemoved 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.

Constants (6) keyboard_arrow_up

HERO_TYPE_OFFSET Constant

_ERC721_RECEIVED Constant

_InterfaceId_ERC721 Constant

_InterfaceId_ERC165 Constant

_InterfaceId_ERC721Enumerable Constant

InterfaceId_ERC721Metadata Constant

State Variables (18) keyboard_arrow_up

tokenURIPrefix Variable

heroTypeToSupplyLimit Variable

_mintingFinished Variable

_tokenOwner Variable

_tokenApprovals Variable

_ownedTokensCount Variable

_operatorApprovals Variable

_supportedInterfaces Variable

_ownedTokens Variable

_ownedTokensIndex Variable

_allTokens Variable

_allTokensIndex Variable

_name Variable

_symbol Variable

_tokenURIs Variable

minters Variable

_paused Variable

pausers Variable

Functions Expand All Collapse All

isPauser 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

addPauser 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.

onlyPauser checks for the following:

Source Code

renouncePauser 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

paused 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

pause 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.

onlyPauser checks for the following:

whenNotPaused checks for the following:

Source Code

unpause 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.

Events (10)

Parameters

Parameters

Parameters

Parameters

Parameters

Parameters

Parameters

Parameters

Parameters

Parameters

Constants (6)

State Variables (18)

isPauser

Parameters

addPauser

Parameters

Modifiers

renouncePauser

Parameters

paused

Parameters

pause

Parameters

Modifiers

unpause

Parameters

Modifiers

balanceOf

Parameters

Requirements

ownerOf

Parameters

Requirements

approve

Parameters

Modifiers

Requirements

getApproved

Parameters

Requirements

setApprovalForAll

Parameters

Modifiers

Requirements

isApprovedForAll

Parameters

transferFrom

Parameters

Modifiers

Requirements

safeTransferFrom

Parameters

Requirements

safeTransferFrom

Parameters

Requirements

supportsInterface

Parameters

isMinter

Parameters

addMinter

Parameters

Modifiers

renounceMinter

Parameters