Spells of Genesis Askian Card

0x9227a3d959654c8004fa77dffc380ec40880fff6 Copy

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Stats

Public Functions 23

Event Types 4

Code Size 55,128 bytes

Events (4)

Approval Event

Parameters

owner	address
approved	address
tokenId	uint256

ApprovalForAll Event

Parameters

owner	address
operator	address
approved	bool

OwnershipTransferred Event

Parameters

previousOwner	address
newOwner	address

Transfer Event

Parameters

from	address
to	address
tokenId	uint256

Constants (5)

_ERC721_RECEIVED Constant

bytes4

0x150b7a02

_INTERFACE_ID_ERC721 Constant

bytes4

0x80ac58cd

_INTERFACE_ID_ERC165 Constant

bytes4

0x01ffc9a7

_INTERFACE_ID_ERC721_ENUMERABLE Constant

bytes4

0x780e9d63

_INTERFACE_ID_ERC721_METADATA Constant

bytes4

0x5b5e139f

State Variables (16)

proxyRegistryAddress Variable

address

Internal Variable

_currentTokenId Variable

uint256

Internal Variable

_tokenOwner Variable

mapping(uint256 => address)

Internal Variable

_tokenApprovals Variable

mapping(uint256 => address)

Internal Variable

_ownedTokensCount Variable

mapping(address => Counters.Counter)

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

_baseURI Variable

string

Internal Variable

_tokenURIs Variable

mapping(uint256 => string)

Internal Variable

_owner Variable

address

Internal Variable

Functions Expand All Collapse All

owner

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

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

isOwner

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

function isOwner() public view returns (bool) {
  return _msgSender() == _owner;
}

renounceOwnership

Parameters

This function has no parameters.

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

null

Source Code

function renounceOwnership() public 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:

null

Requirements

newOwner must not be equal to UNKNOWN VALUE

Source Code

function transferOwnership(address newOwner) public onlyOwner {
  _transferOwnership(newOwner);
}

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), "ERC721: balance query for the zero address");

  return _ownedTokensCount[owner].current();
}

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), "ERC721: owner query for nonexistent token");

  return owner;
}

safeTransferFrom

Parameters

Name	Type
from	address
to	address
tokenId	uint256

Properties

Visibility public

Mutability transaction

Requirements

null

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

to must not be equal to UNKNOWN VALUE

null

Source Code

function safeTransferFrom(
  address from,
  address to,
  uint256 tokenId
) public {
  safeTransferFrom(from, to, tokenId, "");
}

transferFrom

Parameters

Name	Type
from	address
to	address
tokenId	uint256

Properties

Visibility public

Mutability transaction

Requirements

null

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

to must not be equal to UNKNOWN VALUE

Source Code

function transferFrom(
  address from,
  address to,
  uint256 tokenId
) public {
  //solhint-disable-next-line max-line-length
  require(
    _isApprovedOrOwner(_msgSender(), tokenId),
    "ERC721: transfer caller is not owner nor approved"
  );

  _transferFrom(from, to, tokenId);
}

approve

Parameters

Name	Type
to	address
tokenId	uint256

Properties

Visibility public

Mutability transaction

Requirements

to must not be equal to owner

One or more of the following: -null - OR owner must be equal to the result of calling _msgSender

Source Code

function approve(address to, uint256 tokenId) public {
  address owner = ownerOf(tokenId);
  require(to != owner, "ERC721: approval to current owner");

  require(
    _msgSender() == owner || isApprovedForAll(owner, _msgSender()),
    "ERC721: approve caller is not owner nor approved for all"
  );

  _tokenApprovals[tokenId] = to;
  emit Approval(owner, 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), "ERC721: approved query for nonexistent token");

  return _tokenApprovals[tokenId];
}

setApprovalForAll

Parameters

Name	Type
to	address
approved	bool

Properties

Visibility public

Mutability transaction

Requirements

to must not be equal to the result of calling _msgSender

Source Code

function setApprovalForAll(address to, bool approved) public {
  require(to != _msgSender(), "ERC721: approve to caller");

  _operatorApprovals[_msgSender()][to] = approved;
  emit ApprovalForAll(_msgSender(), 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)
{
  // Whitelist OpenSea proxy contract for easy trading.
  ProxyRegistry proxyRegistry = ProxyRegistry(proxyRegistryAddress);
  if (address(proxyRegistry.proxies(owner)) == operator) {
    return true;
  }

  return super.isApprovedForAll(owner, operator);
}

safeTransferFrom

Parameters

Name	Type
from	address
to	address
tokenId	uint256
_data	bytes

Properties

Visibility public

Mutability transaction

Requirements

null

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

to must not be equal to UNKNOWN VALUE

null

Source Code

function safeTransferFrom(
  address from,
  address to,
  uint256 tokenId,
  bytes memory _data
) public {
  require(
    _isApprovedOrOwner(_msgSender(), tokenId),
    "ERC721: transfer caller is not owner nor approved"
  );
  _safeTransferFrom(from, to, tokenId, _data);
}

name

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

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

symbol

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

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

tokenURI

Parameters

Name	Type
_tokenId	uint256

Properties

Visibility public

Mutability view

Source Code

function tokenURI(uint256 _tokenId) external view returns (string memory) {
  return Strings.strConcat(baseTokenURI(), Strings.uint2str(_tokenId));
}

supportsInterface

Parameters

Name	Type
interfaceId	bytes4

Properties

Visibility public

Mutability view

Source Code

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

baseURI

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

function baseURI() external view returns (string memory) {
  return _baseURI;
}

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),
    "ERC721Enumerable: owner index out of bounds"
  );
  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(),
    "ERC721Enumerable: global index out of bounds"
  );
  return _allTokens[index];
}

mintTo

Parameters

Name	Type
_to	address

Properties

Visibility public

Mutability transaction

Modifiers

onlyOwner checks for the following:

null

Requirements

to must not be equal to UNKNOWN VALUE

the result of calling _exists with tokenId must not be true

Source Code

function mintTo(address _to) public onlyOwner {
  uint256 newTokenId = _getNextTokenId();
  _mint(_to, newTokenId);
  _incrementTokenId();
}

baseTokenURI

Parameters

This function has no parameters.

Properties

Visibility public

Mutability view

Source Code

function baseTokenURI() public view returns (string memory) {
  return "https://metadata.spellsofgenesis.com/sog-eth-askian/";
}

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 TradeableERC721Token._getNextTokenId

Parameters

This function has no parameters.

Properties

Visibility private

Mutability view

Source Code

function _getNextTokenId() private view returns (uint256) {
  return _currentTokenId.add(1);
}

internal TradeableERC721Token._incrementTokenId

Parameters

This function has no parameters.

Properties

Visibility private

Mutability transaction

Source Code

function _incrementTokenId() private {
  _currentTokenId++;
}

internal ERC721._safeTransferFrom

Parameters

Name	Type
from	address
to	address
tokenId	uint256
_data	bytes

Properties

Visibility internal

Mutability transaction

Requirements

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

to must not be equal to UNKNOWN VALUE

null

Source Code

function _safeTransferFrom(
  address from,
  address to,
  uint256 tokenId,
  bytes memory _data
) internal {
  _transferFrom(from, to, tokenId);
  require(
    _checkOnERC721Received(from, to, tokenId, _data),
    "ERC721: transfer to non ERC721Receiver implementer"
  );
}

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

Requirements

null

Source Code

function _isApprovedOrOwner(address spender, uint256 tokenId)
  internal
  view
  returns (bool)
{
  require(_exists(tokenId), "ERC721: operator query for nonexistent token");
  address owner = ownerOf(tokenId);
  return (spender == owner ||
    getApproved(tokenId) == spender ||
    isApprovedForAll(owner, spender));
}

internal ERC721._safeMint

Parameters

Name	Type
to	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

to must not be equal to UNKNOWN VALUE

the result of calling _exists with tokenId must not be true

null

Source Code

function _safeMint(address to, uint256 tokenId) internal {
  _safeMint(to, tokenId, "");
}

internal ERC721._safeMint

Parameters

Name	Type
to	address
tokenId	uint256
_data	bytes

Properties

Visibility internal

Mutability transaction

Requirements

to must not be equal to UNKNOWN VALUE

the result of calling _exists with tokenId must not be true

null

Source Code

function _safeMint(
  address to,
  uint256 tokenId,
  bytes memory _data
) internal {
  _mint(to, tokenId);
  require(
    _checkOnERC721Received(address(0), to, tokenId, _data),
    "ERC721: transfer to non ERC721Receiver implementer"
  );
}

internal ERC721._mint

Parameters

Name	Type
to	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

to must not be equal to UNKNOWN VALUE

the result of calling _exists with tokenId must not be true

Source Code

function _mint(address to, uint256 tokenId) internal {
  require(to != address(0), "ERC721: mint to the zero address");
  require(!_exists(tokenId), "ERC721: token already minted");

  _tokenOwner[tokenId] = to;
  _ownedTokensCount[to].increment();

  emit Transfer(address(0), to, tokenId);
}

internal ERC721._burn

Parameters

Name	Type
owner	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

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

Source Code

function _burn(address owner, uint256 tokenId) internal {
  require(ownerOf(tokenId) == owner, "ERC721: burn of token that is not own");

  _clearApproval(tokenId);

  _ownedTokensCount[owner].decrement();
  _tokenOwner[tokenId] = address(0);

  emit Transfer(owner, address(0), tokenId);
}

internal ERC721._burn

Parameters

Name	Type
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

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

Source Code

function _burn(uint256 tokenId) internal {
  _burn(ownerOf(tokenId), tokenId);
}

internal ERC721._transferFrom

Parameters

Name	Type
from	address
to	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

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

to must not be equal to UNKNOWN VALUE

Source Code

function _transferFrom(
  address from,
  address to,
  uint256 tokenId
) internal {
  require(
    ownerOf(tokenId) == from,
    "ERC721: transfer of token that is not own"
  );
  require(to != address(0), "ERC721: transfer to the zero address");

  _clearApproval(tokenId);

  _ownedTokensCount[from].decrement();
  _ownedTokensCount[to].increment();

  _tokenOwner[tokenId] = to;

  emit Transfer(from, to, tokenId);
}

internal ERC721._checkOnERC721Received

Parameters

Name	Type
from	address
to	address
tokenId	uint256
_data	bytes

Properties

Visibility internal

Mutability transaction

Source Code

function _checkOnERC721Received(
  address from,
  address to,
  uint256 tokenId,
  bytes memory _data
) internal returns (bool) {
  if (!to.isContract()) {
    return true;
  }
  // solhint-disable-next-line avoid-low-level-calls
  (bool success, bytes memory returndata) = to.call(
    abi.encodeWithSelector(
      IERC721Receiver(to).onERC721Received.selector,
      _msgSender(),
      from,
      tokenId,
      _data
    )
  );
  if (!success) {
    if (returndata.length > 0) {
      // solhint-disable-next-line no-inline-assembly
      assembly {
        let returndata_size := mload(returndata)
        revert(add(32, returndata), returndata_size)
      }
    } else {
      revert("ERC721: transfer to non ERC721Receiver implementer");
    }
  } else {
    bytes4 retval = abi.decode(returndata, (bytes4));
    return (retval == _ERC721_RECEIVED);
  }
}

internal ERC721._clearApproval

Parameters

Name	Type
tokenId	uint256

Properties

Visibility private

Mutability transaction

Source Code

function _clearApproval(uint256 tokenId) private {
  if (_tokenApprovals[tokenId] != address(0)) {
    _tokenApprovals[tokenId] = address(0);
  }
}

internal Context.constructor

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability transaction

Source Code

constructor() internal {}

internal Context._msgSender

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability view

Source Code

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

internal ERC165.constructor

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability transaction

Requirements

_INTERFACE_ID_ERC165 must not be equal to 0xffffffff

Source Code

constructor() internal {
  // Derived contracts need only register support for their own interfaces,
  // we register support for ERC165 itself here
  _registerInterface(_INTERFACE_ID_ERC165);
}

internal ERC165._registerInterface

Parameters

Name	Type
interfaceId	bytes4

Properties

Visibility internal

Mutability transaction

Requirements

_INTERFACE_ID_ERC165 must not be equal to 0xffffffff

Source Code

function _registerInterface(bytes4 interfaceId) internal {
  require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
  _supportedInterfaces[interfaceId] = true;
}

internal ERC721Enumerable._transferFrom

Parameters

Name	Type
from	address
to	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

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

to must not be equal to UNKNOWN VALUE

Source Code

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

  _removeTokenFromOwnerEnumeration(from, tokenId);

  _addTokenToOwnerEnumeration(to, tokenId);
}

internal ERC721Enumerable._mint

Parameters

Name	Type
to	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

to must not be equal to UNKNOWN VALUE

the result of calling _exists with tokenId must not be true

Source Code

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

  _addTokenToOwnerEnumeration(to, tokenId);

  _addTokenToAllTokensEnumeration(tokenId);
}

internal ERC721Enumerable._burn

Parameters

Name	Type
owner	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

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

Source Code

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

  _removeTokenFromOwnerEnumeration(owner, tokenId);
  // Since tokenId will be deleted, we can clear its slot in _ownedTokensIndex to trigger a gas refund
  _ownedTokensIndex[tokenId] = 0;

  _removeTokenFromAllTokensEnumeration(tokenId);
}

internal ERC721Enumerable._tokensOfOwner

Parameters

Name	Type
owner	address

Properties

Visibility internal

Mutability view

Source Code

function _tokensOfOwner(address owner)
  internal
  view
  returns (uint256[] storage)
{
  return _ownedTokens[owner];
}

internal ERC721Enumerable._addTokenToOwnerEnumeration

Parameters

Name	Type
to	address
tokenId	uint256

Properties

Visibility private

Mutability transaction

Source Code

function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
  _ownedTokensIndex[tokenId] = _ownedTokens[to].length;
  _ownedTokens[to].push(tokenId);
}

internal ERC721Enumerable._addTokenToAllTokensEnumeration

Parameters

Name	Type
tokenId	uint256

Properties

Visibility private

Mutability transaction

Source Code

function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
  _allTokensIndex[tokenId] = _allTokens.length;
  _allTokens.push(tokenId);
}

internal ERC721Enumerable._removeTokenFromOwnerEnumeration

Parameters

Name	Type
from	address
tokenId	uint256

Properties

Visibility private

Mutability transaction

Source Code

function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId)
  private
{
  // To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
  // then delete the last slot (swap and pop).

  uint256 lastTokenIndex = _ownedTokens[from].length.sub(1);
  uint256 tokenIndex = _ownedTokensIndex[tokenId];

  // When the token to delete is the last token, the swap operation is unnecessary
  if (tokenIndex != lastTokenIndex) {
    uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];

    _ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
    _ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
  }

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

  // Note that _ownedTokensIndex[tokenId] hasn't been cleared: it still points to the old slot (now occupied by
  // lastTokenId, or just over the end of the array if the token was the last one).
}

internal ERC721Enumerable._removeTokenFromAllTokensEnumeration

Parameters

Name	Type
tokenId	uint256

Properties

Visibility private

Mutability transaction

Source Code

function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
  // To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
  // then delete the last slot (swap and pop).

  uint256 lastTokenIndex = _allTokens.length.sub(1);
  uint256 tokenIndex = _allTokensIndex[tokenId];

  // When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
  // rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
  // an 'if' statement (like in _removeTokenFromOwnerEnumeration)
  uint256 lastTokenId = _allTokens[lastTokenIndex];

  _allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
  _allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index

  // This also deletes the contents at the last position of the array
  _allTokens.length--;
  _allTokensIndex[tokenId] = 0;
}

internal Context.constructor

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability transaction

Source Code

constructor() internal {}

internal Context._msgSender

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability view

Source Code

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

internal ERC165.constructor

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability transaction

Requirements

_INTERFACE_ID_ERC165 must not be equal to 0xffffffff

Source Code

constructor() internal {
  // Derived contracts need only register support for their own interfaces,
  // we register support for ERC165 itself here
  _registerInterface(_INTERFACE_ID_ERC165);
}

internal ERC165._registerInterface

Parameters

Name	Type
interfaceId	bytes4

Properties

Visibility internal

Mutability transaction

Requirements

_INTERFACE_ID_ERC165 must not be equal to 0xffffffff

Source Code

function _registerInterface(bytes4 interfaceId) internal {
  require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
  _supportedInterfaces[interfaceId] = true;
}

internal ERC721._safeTransferFrom

Parameters

Name	Type
from	address
to	address
tokenId	uint256
_data	bytes

Properties

Visibility internal

Mutability transaction

Requirements

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

to must not be equal to UNKNOWN VALUE

null

Source Code

function _safeTransferFrom(
  address from,
  address to,
  uint256 tokenId,
  bytes memory _data
) internal {
  _transferFrom(from, to, tokenId);
  require(
    _checkOnERC721Received(from, to, tokenId, _data),
    "ERC721: transfer to non ERC721Receiver implementer"
  );
}

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

Requirements

null

Source Code

function _isApprovedOrOwner(address spender, uint256 tokenId)
  internal
  view
  returns (bool)
{
  require(_exists(tokenId), "ERC721: operator query for nonexistent token");
  address owner = ownerOf(tokenId);
  return (spender == owner ||
    getApproved(tokenId) == spender ||
    isApprovedForAll(owner, spender));
}

internal ERC721._safeMint

Parameters

Name	Type
to	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

to must not be equal to UNKNOWN VALUE

the result of calling _exists with tokenId must not be true

null

Source Code

function _safeMint(address to, uint256 tokenId) internal {
  _safeMint(to, tokenId, "");
}

internal ERC721._safeMint

Parameters

Name	Type
to	address
tokenId	uint256
_data	bytes

Properties

Visibility internal

Mutability transaction

Requirements

to must not be equal to UNKNOWN VALUE

the result of calling _exists with tokenId must not be true

null

Source Code

function _safeMint(
  address to,
  uint256 tokenId,
  bytes memory _data
) internal {
  _mint(to, tokenId);
  require(
    _checkOnERC721Received(address(0), to, tokenId, _data),
    "ERC721: transfer to non ERC721Receiver implementer"
  );
}

internal ERC721._mint

Parameters

Name	Type
to	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

to must not be equal to UNKNOWN VALUE

the result of calling _exists with tokenId must not be true

Source Code

function _mint(address to, uint256 tokenId) internal {
  require(to != address(0), "ERC721: mint to the zero address");
  require(!_exists(tokenId), "ERC721: token already minted");

  _tokenOwner[tokenId] = to;
  _ownedTokensCount[to].increment();

  emit Transfer(address(0), to, tokenId);
}

internal ERC721._burn

Parameters

Name	Type
owner	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

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

Source Code

function _burn(address owner, uint256 tokenId) internal {
  require(ownerOf(tokenId) == owner, "ERC721: burn of token that is not own");

  _clearApproval(tokenId);

  _ownedTokensCount[owner].decrement();
  _tokenOwner[tokenId] = address(0);

  emit Transfer(owner, address(0), tokenId);
}

internal ERC721._burn

Parameters

Name	Type
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

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

Source Code

function _burn(uint256 tokenId) internal {
  _burn(ownerOf(tokenId), tokenId);
}

internal ERC721._transferFrom

Parameters

Name	Type
from	address
to	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

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

to must not be equal to UNKNOWN VALUE

Source Code

function _transferFrom(
  address from,
  address to,
  uint256 tokenId
) internal {
  require(
    ownerOf(tokenId) == from,
    "ERC721: transfer of token that is not own"
  );
  require(to != address(0), "ERC721: transfer to the zero address");

  _clearApproval(tokenId);

  _ownedTokensCount[from].decrement();
  _ownedTokensCount[to].increment();

  _tokenOwner[tokenId] = to;

  emit Transfer(from, to, tokenId);
}

internal ERC721._checkOnERC721Received

Parameters

Name	Type
from	address
to	address
tokenId	uint256
_data	bytes

Properties

Visibility internal

Mutability transaction

Source Code

function _checkOnERC721Received(
  address from,
  address to,
  uint256 tokenId,
  bytes memory _data
) internal returns (bool) {
  if (!to.isContract()) {
    return true;
  }
  // solhint-disable-next-line avoid-low-level-calls
  (bool success, bytes memory returndata) = to.call(
    abi.encodeWithSelector(
      IERC721Receiver(to).onERC721Received.selector,
      _msgSender(),
      from,
      tokenId,
      _data
    )
  );
  if (!success) {
    if (returndata.length > 0) {
      // solhint-disable-next-line no-inline-assembly
      assembly {
        let returndata_size := mload(returndata)
        revert(add(32, returndata), returndata_size)
      }
    } else {
      revert("ERC721: transfer to non ERC721Receiver implementer");
    }
  } else {
    bytes4 retval = abi.decode(returndata, (bytes4));
    return (retval == _ERC721_RECEIVED);
  }
}

internal ERC721._clearApproval

Parameters

Name	Type
tokenId	uint256

Properties

Visibility private

Mutability transaction

Source Code

function _clearApproval(uint256 tokenId) private {
  if (_tokenApprovals[tokenId] != address(0)) {
    _tokenApprovals[tokenId] = address(0);
  }
}

internal Context.constructor

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability transaction

Source Code

constructor() internal {}

internal Context._msgSender

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability view

Source Code

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

internal ERC165.constructor

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability transaction

Requirements

_INTERFACE_ID_ERC165 must not be equal to 0xffffffff

Source Code

constructor() internal {
  // Derived contracts need only register support for their own interfaces,
  // we register support for ERC165 itself here
  _registerInterface(_INTERFACE_ID_ERC165);
}

internal ERC165._registerInterface

Parameters

Name	Type
interfaceId	bytes4

Properties

Visibility internal

Mutability transaction

Requirements

_INTERFACE_ID_ERC165 must not be equal to 0xffffffff

Source Code

function _registerInterface(bytes4 interfaceId) internal {
  require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
  _supportedInterfaces[interfaceId] = true;
}

internal ERC721Metadata._setTokenURI

Parameters

Name	Type
tokenId	uint256
_tokenURI	string

Properties

Visibility internal

Mutability transaction

Requirements

null

Source Code

function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal {
  require(_exists(tokenId), "ERC721Metadata: URI set of nonexistent token");
  _tokenURIs[tokenId] = _tokenURI;
}

internal ERC721Metadata._setBaseURI

Parameters

Name	Type
baseURI	string

Properties

Visibility internal

Mutability transaction

Source Code

function _setBaseURI(string memory baseURI) internal {
  _baseURI = baseURI;
}

internal ERC721Metadata._burn

Parameters

Name	Type
owner	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

the result of calling ownerOf with tokenId 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 Context.constructor

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability transaction

Source Code

constructor() internal {}

internal Context._msgSender

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability view

Source Code

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

internal ERC165.constructor

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability transaction

Requirements

_INTERFACE_ID_ERC165 must not be equal to 0xffffffff

Source Code

constructor() internal {
  // Derived contracts need only register support for their own interfaces,
  // we register support for ERC165 itself here
  _registerInterface(_INTERFACE_ID_ERC165);
}

internal ERC165._registerInterface

Parameters

Name	Type
interfaceId	bytes4

Properties

Visibility internal

Mutability transaction

Requirements

_INTERFACE_ID_ERC165 must not be equal to 0xffffffff

Source Code

function _registerInterface(bytes4 interfaceId) internal {
  require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
  _supportedInterfaces[interfaceId] = true;
}

internal ERC721._safeTransferFrom

Parameters

Name	Type
from	address
to	address
tokenId	uint256
_data	bytes

Properties

Visibility internal

Mutability transaction

Requirements

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

to must not be equal to UNKNOWN VALUE

null

Source Code

function _safeTransferFrom(
  address from,
  address to,
  uint256 tokenId,
  bytes memory _data
) internal {
  _transferFrom(from, to, tokenId);
  require(
    _checkOnERC721Received(from, to, tokenId, _data),
    "ERC721: transfer to non ERC721Receiver implementer"
  );
}

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

Requirements

null

Source Code

function _isApprovedOrOwner(address spender, uint256 tokenId)
  internal
  view
  returns (bool)
{
  require(_exists(tokenId), "ERC721: operator query for nonexistent token");
  address owner = ownerOf(tokenId);
  return (spender == owner ||
    getApproved(tokenId) == spender ||
    isApprovedForAll(owner, spender));
}

internal ERC721._safeMint

Parameters

Name	Type
to	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

to must not be equal to UNKNOWN VALUE

the result of calling _exists with tokenId must not be true

null

Source Code

function _safeMint(address to, uint256 tokenId) internal {
  _safeMint(to, tokenId, "");
}

internal ERC721._safeMint

Parameters

Name	Type
to	address
tokenId	uint256
_data	bytes

Properties

Visibility internal

Mutability transaction

Requirements

to must not be equal to UNKNOWN VALUE

the result of calling _exists with tokenId must not be true

null

Source Code

function _safeMint(
  address to,
  uint256 tokenId,
  bytes memory _data
) internal {
  _mint(to, tokenId);
  require(
    _checkOnERC721Received(address(0), to, tokenId, _data),
    "ERC721: transfer to non ERC721Receiver implementer"
  );
}

internal ERC721._mint

Parameters

Name	Type
to	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

to must not be equal to UNKNOWN VALUE

the result of calling _exists with tokenId must not be true

Source Code

function _mint(address to, uint256 tokenId) internal {
  require(to != address(0), "ERC721: mint to the zero address");
  require(!_exists(tokenId), "ERC721: token already minted");

  _tokenOwner[tokenId] = to;
  _ownedTokensCount[to].increment();

  emit Transfer(address(0), to, tokenId);
}

internal ERC721._burn

Parameters

Name	Type
owner	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

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

Source Code

function _burn(address owner, uint256 tokenId) internal {
  require(ownerOf(tokenId) == owner, "ERC721: burn of token that is not own");

  _clearApproval(tokenId);

  _ownedTokensCount[owner].decrement();
  _tokenOwner[tokenId] = address(0);

  emit Transfer(owner, address(0), tokenId);
}

internal ERC721._burn

Parameters

Name	Type
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

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

Source Code

function _burn(uint256 tokenId) internal {
  _burn(ownerOf(tokenId), tokenId);
}

internal ERC721._transferFrom

Parameters

Name	Type
from	address
to	address
tokenId	uint256

Properties

Visibility internal

Mutability transaction

Requirements

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

to must not be equal to UNKNOWN VALUE

Source Code

function _transferFrom(
  address from,
  address to,
  uint256 tokenId
) internal {
  require(
    ownerOf(tokenId) == from,
    "ERC721: transfer of token that is not own"
  );
  require(to != address(0), "ERC721: transfer to the zero address");

  _clearApproval(tokenId);

  _ownedTokensCount[from].decrement();
  _ownedTokensCount[to].increment();

  _tokenOwner[tokenId] = to;

  emit Transfer(from, to, tokenId);
}

internal ERC721._checkOnERC721Received

Parameters

Name	Type
from	address
to	address
tokenId	uint256
_data	bytes

Properties

Visibility internal

Mutability transaction

Source Code

function _checkOnERC721Received(
  address from,
  address to,
  uint256 tokenId,
  bytes memory _data
) internal returns (bool) {
  if (!to.isContract()) {
    return true;
  }
  // solhint-disable-next-line avoid-low-level-calls
  (bool success, bytes memory returndata) = to.call(
    abi.encodeWithSelector(
      IERC721Receiver(to).onERC721Received.selector,
      _msgSender(),
      from,
      tokenId,
      _data
    )
  );
  if (!success) {
    if (returndata.length > 0) {
      // solhint-disable-next-line no-inline-assembly
      assembly {
        let returndata_size := mload(returndata)
        revert(add(32, returndata), returndata_size)
      }
    } else {
      revert("ERC721: transfer to non ERC721Receiver implementer");
    }
  } else {
    bytes4 retval = abi.decode(returndata, (bytes4));
    return (retval == _ERC721_RECEIVED);
  }
}

internal ERC721._clearApproval

Parameters

Name	Type
tokenId	uint256

Properties

Visibility private

Mutability transaction

Source Code

function _clearApproval(uint256 tokenId) private {
  if (_tokenApprovals[tokenId] != address(0)) {
    _tokenApprovals[tokenId] = address(0);
  }
}

internal Context.constructor

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability transaction

Source Code

constructor() internal {}

internal Context._msgSender

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability view

Source Code

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

internal ERC165.constructor

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability transaction

Requirements

_INTERFACE_ID_ERC165 must not be equal to 0xffffffff

Source Code

constructor() internal {
  // Derived contracts need only register support for their own interfaces,
  // we register support for ERC165 itself here
  _registerInterface(_INTERFACE_ID_ERC165);
}

internal ERC165._registerInterface

Parameters

Name	Type
interfaceId	bytes4

Properties

Visibility internal

Mutability transaction

Requirements

_INTERFACE_ID_ERC165 must not be equal to 0xffffffff

Source Code

function _registerInterface(bytes4 interfaceId) internal {
  require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
  _supportedInterfaces[interfaceId] = true;
}

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 Ownable._transferOwnership

Parameters

Name	Type
newOwner	address

Properties

Visibility internal

Mutability transaction

Requirements

newOwner must not be equal to UNKNOWN VALUE

Source Code

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

internal Context.constructor

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability transaction

Source Code

constructor() internal {}

internal Context._msgSender

Parameters

This function has no parameters.

Properties

Visibility internal

Mutability view

Source Code

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

Spells of Genesis Askian Card

About

Stats

Events (4) 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.

OwnershipTransferred 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

_ERC721_RECEIVED Constant

_INTERFACE_ID_ERC721 Constant

_INTERFACE_ID_ERC165 Constant

_INTERFACE_ID_ERC721_ENUMERABLE Constant

_INTERFACE_ID_ERC721_METADATA Constant

State Variables (16) keyboard_arrow_up

proxyRegistryAddress Variable

_currentTokenId Variable

_tokenOwner Variable

_tokenApprovals Variable

_ownedTokensCount Variable

_operatorApprovals Variable

_supportedInterfaces Variable

_ownedTokens Variable

_ownedTokensIndex Variable

_allTokens Variable

_allTokensIndex Variable

_name Variable

_symbol Variable

_baseURI Variable

_tokenURIs Variable

_owner Variable

Functions Expand All Collapse All

owner 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

isOwner 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

renounceOwnership 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.

onlyOwner checks for the following:

Source Code

transferOwnership 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.

onlyOwner checks for the following:

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

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

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

ownerOf 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

safeTransferFrom 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

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

Events (4)

Parameters

Parameters

Parameters

Parameters

Constants (5)

State Variables (16)

owner

Parameters

isOwner

Parameters

renounceOwnership

Parameters

Modifiers

transferOwnership

Parameters

Modifiers

Requirements

balanceOf

Parameters

Requirements

ownerOf

Parameters

Requirements

safeTransferFrom

Parameters

Requirements

transferFrom

Parameters

Requirements

approve

Parameters

Requirements

getApproved

Parameters

Requirements

setApprovalForAll

Parameters

Requirements

isApprovedForAll

Parameters

safeTransferFrom

Parameters

Requirements

name

Parameters

symbol

Parameters

tokenURI

Parameters

supportsInterface

Parameters

baseURI

Parameters

totalSupply

Parameters

tokenOfOwnerByIndex

Parameters

Requirements

tokenByIndex

Parameters

Requirements

mintTo

Parameters

Modifiers

Requirements

baseTokenURI

Parameters

internal TradeableERC721Token._getNextTokenId

Parameters