Contract Source Code:
// SPDX-License-Identifier: MIT
import {DefaultOperatorFilterer} from "./DefaultOperatorFilterer.sol";
pragma solidity ^0.8.0;
/**
* @dev These functions deal with verification of Merkle Trees proofs.
*
* The proofs can be generated using the JavaScript library
* https://github.com/miguelmota/merkletreejs[merkletreejs].
* Note: the hashing algorithm should be keccak256 and pair sorting should be enabled.
*
* See `test/utils/cryptography/MerkleProof.test.js` for some examples.
*
* WARNING: You should avoid using leaf values that are 64 bytes long prior to
* hashing, or use a hash function other than keccak256 for hashing leaves.
* This is because the concatenation of a sorted pair of internal nodes in
* the merkle tree could be reinterpreted as a leaf value.
*/
library MerkleProof {
/**
* @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
* defined by `root`. For this, a `proof` must be provided, containing
* sibling hashes on the branch from the leaf to the root of the tree. Each
* pair of leaves and each pair of pre-images are assumed to be sorted.
*/
function verify(
bytes32[] memory proof,
bytes32 root,
bytes32 leaf
) internal pure returns (bool) {
return processProof(proof, leaf) == root;
}
/**
* @dev Returns the rebuilt hash obtained by traversing a Merkle tree up
* from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
* hash matches the root of the tree. When processing the proof, the pairs
* of leafs & pre-images are assumed to be sorted.
*
* _Available since v4.4._
*/
function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) {
bytes32 computedHash = leaf;
for (uint256 i = 0; i < proof.length; i++) {
bytes32 proofElement = proof[i];
if (computedHash <= proofElement) {
// Hash(current computed hash + current element of the proof)
computedHash = _efficientHash(computedHash, proofElement);
} else {
// Hash(current element of the proof + current computed hash)
computedHash = _efficientHash(proofElement, computedHash);
}
}
return computedHash;
}
function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) {
assembly {
mstore(0x00, a)
mstore(0x20, b)
value := keccak256(0x00, 0x40)
}
}
}
abstract contract ReentrancyGuard {
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
modifier nonReentrant() {
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
_status = _ENTERED;
_;
_status = _NOT_ENTERED;
}
}
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
function toString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor() {
_transferOwnership(_msgSender());
}
function owner() public view virtual returns (address) {
return _owner;
}
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
library Address {
function isContract(address account) internal view returns (bool) {
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
if (returndata.length > 0) {
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
interface IERC721Receiver {
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
interface IERC165 {
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
abstract contract ERC165 is IERC165 {
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
interface IERC721 is IERC165 {
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
function balanceOf(address owner) external view returns (uint256 balance);
function ownerOf(uint256 tokenId) external view returns (address owner);
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
function approve(address to, uint256 tokenId) external;
function getApproved(uint256 tokenId) external view returns (address operator);
function setApprovalForAll(address operator, bool _approved) external;
function isApprovedForAll(address owner, address operator) external view returns (bool);
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
interface IERC721Enumerable is IERC721 {
function totalSupply() external view returns (uint256);
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);
function tokenByIndex(uint256 index) external view returns (uint256);
}
interface IERC721Metadata is IERC721 {
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function tokenURI(uint256 tokenId) external view returns (string memory);
}
error ApprovalCallerNotOwnerNorApproved();
error ApprovalQueryForNonexistentToken();
error ApproveToCaller();
error ApprovalToCurrentOwner();
error BalanceQueryForZeroAddress();
error MintToZeroAddress();
error MintZeroQuantity();
error OwnerQueryForNonexistentToken();
error TransferCallerNotOwnerNorApproved();
error TransferFromIncorrectOwner();
error TransferToNonERC721ReceiverImplementer();
error TransferToZeroAddress();
error URIQueryForNonexistentToken();
contract ERC721A is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Compiler will pack this into a single 256bit word.
struct TokenOwnership {
// The address of the owner.
address addr;
// Keeps track of the start time of ownership with minimal overhead for tokenomics.
uint64 startTimestamp;
// Whether the token has been burned.
bool burned;
}
// Compiler will pack this into a single 256bit word.
struct AddressData {
// Realistically, 2**64-1 is more than enough.
uint64 balance;
// Keeps track of mint count with minimal overhead for tokenomics.
uint64 numberMinted;
// Keeps track of burn count with minimal overhead for tokenomics.
uint64 numberBurned;
// For miscellaneous variable(s) pertaining to the address
// (e.g. number of whitelist mint slots used).
// If there are multiple variables, please pack them into a uint64.
uint64 aux;
}
// The tokenId of the next token to be minted.
uint256 internal _currentIndex;
// The number of tokens burned.
uint256 internal _burnCounter;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to ownership details
// An empty struct value does not necessarily mean the token is unowned. See _ownershipOf implementation for details.
mapping(uint256 => TokenOwnership) internal _ownerships;
// Mapping owner address to address data
mapping(address => AddressData) private _addressData;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
_currentIndex = _startTokenId();
}
/**
* To change the starting tokenId, please override this function.
*/
function _startTokenId() internal view virtual returns (uint256) {
return 1;
}
/**
* @dev Burned tokens are calculated here, use _totalMinted() if you want to count just minted tokens.
*/
function totalSupply() public view returns (uint256) {
// Counter underflow is impossible as _burnCounter cannot be incremented
// more than _currentIndex - _startTokenId() times
unchecked {
return _currentIndex - _burnCounter - _startTokenId();
}
}
/**
* Returns the total amount of tokens minted in the contract.
*/
function _totalMinted() internal view returns (uint256) {
// Counter underflow is impossible as _currentIndex does not decrement,
// and it is initialized to _startTokenId()
unchecked {
return _currentIndex - _startTokenId();
}
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view override returns (uint256) {
if (owner == address(0)) revert BalanceQueryForZeroAddress();
return uint256(_addressData[owner].balance);
}
/**
* Returns the number of tokens minted by `owner`.
*/
function _numberMinted(address owner) internal view returns (uint256) {
return uint256(_addressData[owner].numberMinted);
}
/**
* Returns the number of tokens burned by or on behalf of `owner`.
*/
function _numberBurned(address owner) internal view returns (uint256) {
return uint256(_addressData[owner].numberBurned);
}
/**
* Returns the auxillary data for `owner`. (e.g. number of whitelist mint slots used).
*/
function _getAux(address owner) internal view returns (uint64) {
return _addressData[owner].aux;
}
/**
* Sets the auxillary data for `owner`. (e.g. number of whitelist mint slots used).
* If there are multiple variables, please pack them into a uint64.
*/
function _setAux(address owner, uint64 aux) internal {
_addressData[owner].aux = aux;
}
/**
* Gas spent here starts off proportional to the maximum mint batch size.
* It gradually moves to O(1) as tokens get transferred around in the collection over time.
*/
function _ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) {
uint256 curr = tokenId;
unchecked {
if (_startTokenId() <= curr && curr < _currentIndex) {
TokenOwnership memory ownership = _ownerships[curr];
if (!ownership.burned) {
if (ownership.addr != address(0)) {
return ownership;
}
// Invariant:
// There will always be an ownership that has an address and is not burned
// before an ownership that does not have an address and is not burned.
// Hence, curr will not underflow.
while (true) {
curr--;
ownership = _ownerships[curr];
if (ownership.addr != address(0)) {
return ownership;
}
}
}
}
}
revert OwnerQueryForNonexistentToken();
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view override returns (address) {
return _ownershipOf(tokenId).addr;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
if (!_exists(tokenId)) revert URIQueryForNonexistentToken();
string memory baseURI = _baseURI();
return bytes(baseURI).length != 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : '';
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return '';
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721A.ownerOf(tokenId);
if (to == owner) revert ApprovalToCurrentOwner();
if (_msgSender() != owner && !isApprovedForAll(owner, _msgSender())) {
revert ApprovalCallerNotOwnerNorApproved();
}
_approve(to, tokenId, owner);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view override returns (address) {
if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken();
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
if (operator == _msgSender()) revert ApproveToCaller();
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, '');
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
_transfer(from, to, tokenId);
if (to.isContract() && !_checkContractOnERC721Received(from, to, tokenId, _data)) {
revert TransferToNonERC721ReceiverImplementer();
}
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
*/
function _exists(uint256 tokenId) internal view returns (bool) {
return _startTokenId() <= tokenId && tokenId < _currentIndex && !_ownerships[tokenId].burned;
}
function _safeMint(address to, uint256 quantity) internal {
_safeMint(to, quantity, '');
}
/**
* @dev Safely mints `quantity` tokens and transfers them to `to`.
*
* Requirements:
*
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called for each safe transfer.
* - `quantity` must be greater than 0.
*
* Emits a {Transfer} event.
*/
function _safeMint(
address to,
uint256 quantity,
bytes memory _data
) internal {
_mint(to, quantity, _data, true);
}
/**
* @dev Mints `quantity` tokens and transfers them to `to`.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `quantity` must be greater than 0.
*
* Emits a {Transfer} event.
*/
function _mint(
address to,
uint256 quantity,
bytes memory _data,
bool safe
) internal {
uint256 startTokenId = _currentIndex;
if (to == address(0)) revert MintToZeroAddress();
if (quantity == 0) revert MintZeroQuantity();
_beforeTokenTransfers(address(0), to, startTokenId, quantity);
// Overflows are incredibly unrealistic.
// balance or numberMinted overflow if current value of either + quantity > 1.8e19 (2**64) - 1
// updatedIndex overflows if _currentIndex + quantity > 1.2e77 (2**256) - 1
unchecked {
_addressData[to].balance += uint64(quantity);
_addressData[to].numberMinted += uint64(quantity);
_ownerships[startTokenId].addr = to;
_ownerships[startTokenId].startTimestamp = uint64(block.timestamp);
uint256 updatedIndex = startTokenId;
uint256 end = updatedIndex + quantity;
if (safe && to.isContract()) {
do {
emit Transfer(address(0), to, updatedIndex);
if (!_checkContractOnERC721Received(address(0), to, updatedIndex++, _data)) {
revert TransferToNonERC721ReceiverImplementer();
}
} while (updatedIndex != end);
// Reentrancy protection
if (_currentIndex != startTokenId) revert();
} else {
do {
emit Transfer(address(0), to, updatedIndex++);
} while (updatedIndex != end);
}
_currentIndex = updatedIndex;
}
_afterTokenTransfers(address(0), to, startTokenId, quantity);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) private {
TokenOwnership memory prevOwnership = _ownershipOf(tokenId);
if (prevOwnership.addr != from) revert TransferFromIncorrectOwner();
bool isApprovedOrOwner = (_msgSender() == from ||
isApprovedForAll(from, _msgSender()) ||
getApproved(tokenId) == _msgSender());
if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();
if (to == address(0)) revert TransferToZeroAddress();
_beforeTokenTransfers(from, to, tokenId, 1);
// Clear approvals from the previous owner
_approve(address(0), tokenId, from);
// Underflow of the sender's balance is impossible because we check for
// ownership above and the recipient's balance can't realistically overflow.
// Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
unchecked {
_addressData[from].balance -= 1;
_addressData[to].balance += 1;
TokenOwnership storage currSlot = _ownerships[tokenId];
currSlot.addr = to;
currSlot.startTimestamp = uint64(block.timestamp);
// If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it.
// Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
uint256 nextTokenId = tokenId + 1;
TokenOwnership storage nextSlot = _ownerships[nextTokenId];
if (nextSlot.addr == address(0)) {
// This will suffice for checking _exists(nextTokenId),
// as a burned slot cannot contain the zero address.
if (nextTokenId != _currentIndex) {
nextSlot.addr = from;
nextSlot.startTimestamp = prevOwnership.startTimestamp;
}
}
}
emit Transfer(from, to, tokenId);
_afterTokenTransfers(from, to, tokenId, 1);
}
/**
* @dev This is equivalent to _burn(tokenId, false)
*/
function _burn(uint256 tokenId) internal virtual {
_burn(tokenId, false);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId, bool approvalCheck) internal virtual {
TokenOwnership memory prevOwnership = _ownershipOf(tokenId);
address from = prevOwnership.addr;
if (approvalCheck) {
bool isApprovedOrOwner = (_msgSender() == from ||
isApprovedForAll(from, _msgSender()) ||
getApproved(tokenId) == _msgSender());
if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();
}
_beforeTokenTransfers(from, address(0), tokenId, 1);
// Clear approvals from the previous owner
_approve(address(0), tokenId, from);
// Underflow of the sender's balance is impossible because we check for
// ownership above and the recipient's balance can't realistically overflow.
// Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
unchecked {
AddressData storage addressData = _addressData[from];
addressData.balance -= 1;
addressData.numberBurned += 1;
// Keep track of who burned the token, and the timestamp of burning.
TokenOwnership storage currSlot = _ownerships[tokenId];
currSlot.addr = from;
currSlot.startTimestamp = uint64(block.timestamp);
currSlot.burned = true;
// If the ownership slot of tokenId+1 is not explicitly set, that means the burn initiator owns it.
// Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
uint256 nextTokenId = tokenId + 1;
TokenOwnership storage nextSlot = _ownerships[nextTokenId];
if (nextSlot.addr == address(0)) {
// This will suffice for checking _exists(nextTokenId),
// as a burned slot cannot contain the zero address.
if (nextTokenId != _currentIndex) {
nextSlot.addr = from;
nextSlot.startTimestamp = prevOwnership.startTimestamp;
}
}
}
emit Transfer(from, address(0), tokenId);
_afterTokenTransfers(from, address(0), tokenId, 1);
// Overflow not possible, as _burnCounter cannot be exceed _currentIndex times.
unchecked {
_burnCounter++;
}
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(
address to,
uint256 tokenId,
address owner
) private {
_tokenApprovals[tokenId] = to;
emit Approval(owner, to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkContractOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert TransferToNonERC721ReceiverImplementer();
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
}
/**
* @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting.
* And also called before burning one token.
*
* startTokenId - the first token id to be transferred
* quantity - the amount to be transferred
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, `from`'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, `tokenId` will be burned by `from`.
* - `from` and `to` are never both zero.
*/
function _beforeTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
/**
* @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes
* minting.
* And also called after one token has been burned.
*
* startTokenId - the first token id to be transferred
* quantity - the amount to be transferred
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, `from`'s `tokenId` has been
* transferred to `to`.
* - When `from` is zero, `tokenId` has been minted for `to`.
* - When `to` is zero, `tokenId` has been burned by `from`.
* - `from` and `to` are never both zero.
*/
function _afterTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
}
contract ArtaxiaNFT is Ownable, ERC721A, ReentrancyGuard, DefaultOperatorFilterer {
using Strings for uint256;
uint256 public MAX_PER_Transaction = 10; // maximam amount that user can mint/Transaction
uint256 public MAX_PER_WALLET = 10; // maximam amount that user can mint/Wallet
uint256 public PRICE = 0.01 ether;
uint256 private constant TotalCollectionSize_ = 1143; // total number of nfts
uint256 private constant MaxMintPerBatch_ = 20; //max mint per transaction
uint256 public PhaseCollectionSize_ = 1143; // total number of nfts in Phase 1
uint public status = 0; //0-pause 1-Whitelist 2-Public
string private _baseTokenURI;
string private _uriBeforeReveal;
bool public revealed = false;
mapping(address => uint256) public publicClaimedBy;
constructor() ERC721A("ArtaxiaNFT","ARTAX") {
}
modifier callerIsUser() {
require(tx.origin == msg.sender, "The caller is another contract");
_;
}
function mint(uint256 quantity) external payable callerIsUser {
require(status == 2 , "Sale is not Active");
require(totalSupply() + quantity <= TotalCollectionSize_, "reached max supply");
require(totalSupply() + quantity <= PhaseCollectionSize_, "reached max phase supply");
require(quantity <= MAX_PER_Transaction,"can not mint this many");
require(msg.value >= PRICE * quantity, "Need to send more ETH.");
publicClaimedBy[msg.sender] += quantity;
require(publicClaimedBy[msg.sender] <= MAX_PER_WALLET, "Purchase exceeds max allowed");
_safeMint(msg.sender, quantity);
}
function setBaseURI(string memory baseURI) external onlyOwner {
_baseTokenURI = baseURI;
}
function _baseURI() internal view virtual override returns (string memory) {
return _baseTokenURI;
}
function setURIbeforeReveal(string memory URI) external onlyOwner {
_uriBeforeReveal = URI;
}
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId),"ERC721Metadata: URI query for nonexistent token");
if(revealed == false){
return _uriBeforeReveal;
}
string memory baseURI = _baseURI();
return
bytes(baseURI).length > 0
? string(abi.encodePacked(baseURI, "/", tokenId.toString(), ".json")) : "";
}
function changeRevealStatus() public onlyOwner {
revealed = true;
}
function numberMinted(address owner) public view returns (uint256) {
return _numberMinted(owner);
}
function getOwnershipData(uint256 tokenId)
external
view
returns (TokenOwnership memory)
{
return _ownershipOf(tokenId);
}
function withdrawMoney() external onlyOwner nonReentrant {
(bool success, ) = msg.sender.call{value: address(this).balance}("");
require(success, "Transfer failed.");
}
function changePhaseCollectionSize(uint256 _collection)
external
onlyOwner
{
PhaseCollectionSize_ = _collection;
}
function changeMintPrice(uint256 _newPrice) external onlyOwner
{
PRICE = _newPrice;
}
function changeMAX_PER_Transaction(uint256 q) external onlyOwner
{
MAX_PER_Transaction = q;
}
function changeMAX_PER_WALLET(uint256 q) external onlyOwner
{
MAX_PER_WALLET = q;
}
function setStatus(uint256 s)external onlyOwner{
status = s;
}
function getStatus()public view returns(uint){
return status;
}
function getPrice(uint256 _quantity) public view returns (uint256) {
return _quantity*PRICE;
}
function airdrop(address sendTo, uint quantity)public onlyOwner{
require(totalSupply() + quantity <= TotalCollectionSize_, "reached max supply");
_safeMint(sendTo, quantity);
}
// Whitelist Sale //
uint256 public whiteListPerWallet = 4;
uint256 public MAX_PER_WL_TRANSACTION = 4; // maximam amount that user can mint/Wallet
bytes32 public whitelistMerkleRoot;
uint256 public itemPriceWhiteList = 0 ether;
uint256 private TotalWLavailable = 1143; // total number of nfts
mapping(address => uint256) public whiteListClaimedBy; // mapping list
function setWhitelistMerkleRoot(bytes32 _whitelistMerkleRoot) external onlyOwner {
whitelistMerkleRoot = _whitelistMerkleRoot;
}
function getWhitelistPrice(uint256 _quantity) public view returns (uint256) {
return _quantity*itemPriceWhiteList;
}
function inWhitelist(bytes32[] memory _proof, address _owner) public view returns (bool) {
return MerkleProof.verify(_proof, whitelistMerkleRoot, keccak256(abi.encodePacked(_owner)));
}
function purchaseWhiteListTokens(uint256 _howMany, bytes32[] calldata _proof) external payable {
require(status == 1 , "Sale is not active ");
require(totalSupply()+_howMany<=TotalWLavailable,"Quantity must be lesser then MaxSupply");
require(inWhitelist(_proof, msg.sender), "You are not in presale");
require(msg.value >= _howMany * itemPriceWhiteList, "Try to send more ETH");
require(_howMany <= MAX_PER_WL_TRANSACTION , "can not mint this many");
whiteListClaimedBy[msg.sender] += _howMany;
require(whiteListClaimedBy[msg.sender] <= whiteListPerWallet, "Purchase exceeds max allowed");
_safeMint(msg.sender, _howMany);
}
function setWhiteListPerWallet(uint256 _whiteListPerWallet) external onlyOwner {
whiteListPerWallet = _whiteListPerWallet;
}
function setWLavailable(uint256 _whiteListCollection) external onlyOwner {
TotalWLavailable = _whiteListCollection;
}
function setPriceWhiteList(uint256 _itemPriceWhiteList) external onlyOwner {
itemPriceWhiteList = _itemPriceWhiteList;
}
function changeMAX_PER_WL_TRANSACTION(uint256 q) external onlyOwner {
MAX_PER_WL_TRANSACTION = q;
}
// ---------- CREATOR FEES CODE -------- //
function setApprovalForAll(address operator, bool approved) public override onlyAllowedOperatorApproval(operator) {
super.setApprovalForAll(operator, approved);
}
function approve(address operator, uint256 tokenId) public override onlyAllowedOperatorApproval(operator) {
super.approve(operator, tokenId);
}
function transferFrom(address from, address to, uint256 tokenId) public override onlyAllowedOperator(from) {
super.transferFrom(from, to, tokenId);
}
function safeTransferFrom(address from, address to, uint256 tokenId) public override onlyAllowedOperator(from) {
super.safeTransferFrom(from, to, tokenId);
}
function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory data)
public
override
onlyAllowedOperator(from)
{
super.safeTransferFrom(from, to, tokenId, data);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;
import {OperatorFilterer} from "./OperatorFilterer.sol";
/**
* @title DefaultOperatorFilterer
* @notice Inherits from OperatorFilterer and automatically subscribes to the default OpenSea subscription.
*/
abstract contract DefaultOperatorFilterer is OperatorFilterer {
address constant DEFAULT_SUBSCRIPTION = address(0x3cc6CddA760b79bAfa08dF41ECFA224f810dCeB6);
constructor() OperatorFilterer(DEFAULT_SUBSCRIPTION, true) {}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Library for managing
* https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
* types.
*
* Sets have the following properties:
*
* - Elements are added, removed, and checked for existence in constant time
* (O(1)).
* - Elements are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableSet for EnumerableSet.AddressSet;
*
* // Declare a set state variable
* EnumerableSet.AddressSet private mySet;
* }
* ```
*
* As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
* and `uint256` (`UintSet`) are supported.
*
* [WARNING]
* ====
* Trying to delete such a structure from storage will likely result in data corruption, rendering the structure
* unusable.
* See https://github.com/ethereum/solidity/pull/11843[ethereum/solidity#11843] for more info.
*
* In order to clean an EnumerableSet, you can either remove all elements one by one or create a fresh instance using an
* array of EnumerableSet.
* ====
*/
library EnumerableSet {
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Set type with
// bytes32 values.
// The Set implementation uses private functions, and user-facing
// implementations (such as AddressSet) are just wrappers around the
// underlying Set.
// This means that we can only create new EnumerableSets for types that fit
// in bytes32.
struct Set {
// Storage of set values
bytes32[] _values;
// Position of the value in the `values` array, plus 1 because index 0
// means a value is not in the set.
mapping(bytes32 => uint256) _indexes;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function _add(Set storage set, bytes32 value) private returns (bool) {
if (!_contains(set, value)) {
set._values.push(value);
// The value is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
set._indexes[value] = set._values.length;
return true;
} else {
return false;
}
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function _remove(Set storage set, bytes32 value) private returns (bool) {
// We read and store the value's index to prevent multiple reads from the same storage slot
uint256 valueIndex = set._indexes[value];
if (valueIndex != 0) {
// Equivalent to contains(set, value)
// To delete an element from the _values array in O(1), we swap the element to delete with the last one in
// the array, and then remove the last element (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = valueIndex - 1;
uint256 lastIndex = set._values.length - 1;
if (lastIndex != toDeleteIndex) {
bytes32 lastValue = set._values[lastIndex];
// Move the last value to the index where the value to delete is
set._values[toDeleteIndex] = lastValue;
// Update the index for the moved value
set._indexes[lastValue] = valueIndex; // Replace lastValue's index to valueIndex
}
// Delete the slot where the moved value was stored
set._values.pop();
// Delete the index for the deleted slot
delete set._indexes[value];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function _contains(Set storage set, bytes32 value)
private
view
returns (bool)
{
return set._indexes[value] != 0;
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function _length(Set storage set) private view returns (uint256) {
return set._values.length;
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Set storage set, uint256 index)
private
view
returns (bytes32)
{
return set._values[index];
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function _values(Set storage set) private view returns (bytes32[] memory) {
return set._values;
}
// Bytes32Set
struct Bytes32Set {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(Bytes32Set storage set, bytes32 value)
internal
returns (bool)
{
return _add(set._inner, value);
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(Bytes32Set storage set, bytes32 value)
internal
returns (bool)
{
return _remove(set._inner, value);
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(Bytes32Set storage set, bytes32 value)
internal
view
returns (bool)
{
return _contains(set._inner, value);
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(Bytes32Set storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(Bytes32Set storage set, uint256 index)
internal
view
returns (bytes32)
{
return _at(set._inner, index);
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function values(Bytes32Set storage set)
internal
view
returns (bytes32[] memory)
{
bytes32[] memory store = _values(set._inner);
bytes32[] memory result;
/// @solidity memory-safe-assembly
assembly {
result := store
}
return result;
}
// AddressSet
struct AddressSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(AddressSet storage set, address value)
internal
returns (bool)
{
return _add(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(AddressSet storage set, address value)
internal
returns (bool)
{
return _remove(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(AddressSet storage set, address value)
internal
view
returns (bool)
{
return _contains(set._inner, bytes32(uint256(uint160(value))));
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(AddressSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(AddressSet storage set, uint256 index)
internal
view
returns (address)
{
return address(uint160(uint256(_at(set._inner, index))));
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function values(AddressSet storage set)
internal
view
returns (address[] memory)
{
bytes32[] memory store = _values(set._inner);
address[] memory result;
/// @solidity memory-safe-assembly
assembly {
result := store
}
return result;
}
// UintSet
struct UintSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(UintSet storage set, uint256 value) internal returns (bool) {
return _add(set._inner, bytes32(value));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(UintSet storage set, uint256 value)
internal
returns (bool)
{
return _remove(set._inner, bytes32(value));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(UintSet storage set, uint256 value)
internal
view
returns (bool)
{
return _contains(set._inner, bytes32(value));
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(UintSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(UintSet storage set, uint256 index)
internal
view
returns (uint256)
{
return uint256(_at(set._inner, index));
}
/**
* @dev Return the entire set in an array
*
* WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
* to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
* this function has an unbounded cost, and using it as part of a state-changing function may render the function
* uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
*/
function values(UintSet storage set)
internal
view
returns (uint256[] memory)
{
bytes32[] memory store = _values(set._inner);
uint256[] memory result;
/// @solidity memory-safe-assembly
assembly {
result := store
}
return result;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;
interface IOperatorFilterRegistry {
function isOperatorAllowed(address registrant, address operator) external view returns (bool);
function register(address registrant) external;
function registerAndSubscribe(address registrant, address subscription) external;
function registerAndCopyEntries(address registrant, address registrantToCopy) external;
function unregister(address addr) external;
function updateOperator(address registrant, address operator, bool filtered) external;
function updateOperators(address registrant, address[] calldata operators, bool filtered) external;
function updateCodeHash(address registrant, bytes32 codehash, bool filtered) external;
function updateCodeHashes(address registrant, bytes32[] calldata codeHashes, bool filtered) external;
function subscribe(address registrant, address registrantToSubscribe) external;
function unsubscribe(address registrant, bool copyExistingEntries) external;
function subscriptionOf(address addr) external returns (address registrant);
function subscribers(address registrant) external returns (address[] memory);
function subscriberAt(address registrant, uint256 index) external returns (address);
function copyEntriesOf(address registrant, address registrantToCopy) external;
function isOperatorFiltered(address registrant, address operator) external returns (bool);
function isCodeHashOfFiltered(address registrant, address operatorWithCode) external returns (bool);
function isCodeHashFiltered(address registrant, bytes32 codeHash) external returns (bool);
function filteredOperators(address addr) external returns (address[] memory);
function filteredCodeHashes(address addr) external returns (bytes32[] memory);
function filteredOperatorAt(address registrant, uint256 index) external returns (address);
function filteredCodeHashAt(address registrant, uint256 index) external returns (bytes32);
function isRegistered(address addr) external returns (bool);
function codeHashOf(address addr) external returns (bytes32);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;
import {IOperatorFilterRegistry} from "./IOperatorFilterRegistry.sol";
/**
* @title OperatorFilterer
* @notice Abstract contract whose constructor automatically registers and optionally subscribes to or copies another
* registrant's entries in the OperatorFilterRegistry.
* @dev This smart contract is meant to be inherited by token contracts so they can use the following:
* - `onlyAllowedOperator` modifier for `transferFrom` and `safeTransferFrom` methods.
* - `onlyAllowedOperatorApproval` modifier for `approve` and `setApprovalForAll` methods.
*/
abstract contract OperatorFilterer {
error OperatorNotAllowed(address operator);
IOperatorFilterRegistry public constant OPERATOR_FILTER_REGISTRY =
IOperatorFilterRegistry(0x000000000000AAeB6D7670E522A718067333cd4E);
constructor(address subscriptionOrRegistrantToCopy, bool subscribe) {
// If an inheriting token contract is deployed to a network without the registry deployed, the modifier
// will not revert, but the contract will need to be registered with the registry once it is deployed in
// order for the modifier to filter addresses.
if (address(OPERATOR_FILTER_REGISTRY).code.length > 0) {
if (subscribe) {
OPERATOR_FILTER_REGISTRY.registerAndSubscribe(address(this), subscriptionOrRegistrantToCopy);
} else {
if (subscriptionOrRegistrantToCopy != address(0)) {
OPERATOR_FILTER_REGISTRY.registerAndCopyEntries(address(this), subscriptionOrRegistrantToCopy);
} else {
OPERATOR_FILTER_REGISTRY.register(address(this));
}
}
}
}
modifier onlyAllowedOperator(address from) virtual {
// Allow spending tokens from addresses with balance
// Note that this still allows listings and marketplaces with escrow to transfer tokens if transferred
// from an EOA.
if (from != msg.sender) {
_checkFilterOperator(msg.sender);
}
_;
}
modifier onlyAllowedOperatorApproval(address operator) virtual {
_checkFilterOperator(operator);
_;
}
function _checkFilterOperator(address operator) internal view virtual {
// Check registry code length to facilitate testing in environments without a deployed registry.
if (address(OPERATOR_FILTER_REGISTRY).code.length > 0) {
if (!OPERATOR_FILTER_REGISTRY.isOperatorAllowed(address(this), operator)) {
revert OperatorNotAllowed(operator);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;
import {IOperatorFilterRegistry} from "./IOperatorFilterRegistry.sol";
import {Ownable} from "./Ownable.sol";
import {EnumerableSet} from "./EnumerableSet.sol";
import {OperatorFilterRegistryErrorsAndEvents} from "./OperatorFilterRegistryErrorsAndEvents.sol";
/**
* @title OperatorFilterRegistry
* @notice Borrows heavily from the QQL BlacklistOperatorFilter contract:
* https://github.com/qql-art/contracts/blob/main/contracts/BlacklistOperatorFilter.sol
* @notice This contracts allows tokens or token owners to register specific addresses or codeHashes that may be
* * restricted according to the isOperatorAllowed function.
*/
contract OperatorFilterRegistry is IOperatorFilterRegistry, OperatorFilterRegistryErrorsAndEvents {
using EnumerableSet for EnumerableSet.AddressSet;
using EnumerableSet for EnumerableSet.Bytes32Set;
/// @dev initialized accounts have a nonzero codehash (see https://eips.ethereum.org/EIPS/eip-1052)
/// Note that this will also be a smart contract's codehash when making calls from its constructor.
bytes32 constant EOA_CODEHASH = keccak256("");
mapping(address => EnumerableSet.AddressSet) private _filteredOperators;
mapping(address => EnumerableSet.Bytes32Set) private _filteredCodeHashes;
mapping(address => address) private _registrations;
mapping(address => EnumerableSet.AddressSet) private _subscribers;
/**
* @notice restricts method caller to the address or EIP-173 "owner()"
*/
modifier onlyAddressOrOwner(address addr) {
if (msg.sender != addr) {
try Ownable(addr).owner() returns (address owner) {
if (msg.sender != owner) {
revert OnlyAddressOrOwner();
}
} catch (bytes memory reason) {
if (reason.length == 0) {
revert NotOwnable();
} else {
/// @solidity memory-safe-assembly
assembly {
revert(add(32, reason), mload(reason))
}
}
}
}
_;
}
/**
* @notice Returns true if operator is not filtered for a given token, either by address or codeHash. Also returns
* true if supplied registrant address is not registered.
*/
function isOperatorAllowed(address registrant, address operator) external view returns (bool) {
address registration = _registrations[registrant];
if (registration != address(0)) {
EnumerableSet.AddressSet storage filteredOperatorsRef;
EnumerableSet.Bytes32Set storage filteredCodeHashesRef;
filteredOperatorsRef = _filteredOperators[registration];
filteredCodeHashesRef = _filteredCodeHashes[registration];
if (filteredOperatorsRef.contains(operator)) {
revert AddressFiltered(operator);
}
if (operator.code.length > 0) {
bytes32 codeHash = operator.codehash;
if (filteredCodeHashesRef.contains(codeHash)) {
revert CodeHashFiltered(operator, codeHash);
}
}
}
return true;
}
//////////////////
// AUTH METHODS //
//////////////////
/**
* @notice Registers an address with the registry. May be called by address itself or by EIP-173 owner.
*/
function register(address registrant) external onlyAddressOrOwner(registrant) {
if (_registrations[registrant] != address(0)) {
revert AlreadyRegistered();
}
_registrations[registrant] = registrant;
emit RegistrationUpdated(registrant, true);
}
/**
* @notice Unregisters an address with the registry and removes its subscription. May be called by address itself or by EIP-173 owner.
* Note that this does not remove any filtered addresses or codeHashes.
* Also note that any subscriptions to this registrant will still be active and follow the existing filtered addresses and codehashes.
*/
function unregister(address registrant) external onlyAddressOrOwner(registrant) {
address registration = _registrations[registrant];
if (registration == address(0)) {
revert NotRegistered(registrant);
}
if (registration != registrant) {
_subscribers[registration].remove(registrant);
emit SubscriptionUpdated(registrant, registration, false);
}
_registrations[registrant] = address(0);
emit RegistrationUpdated(registrant, false);
}
/**
* @notice Registers an address with the registry and "subscribes" to another address's filtered operators and codeHashes.
*/
function registerAndSubscribe(address registrant, address subscription) external onlyAddressOrOwner(registrant) {
address registration = _registrations[registrant];
if (registration != address(0)) {
revert AlreadyRegistered();
}
if (registrant == subscription) {
revert CannotSubscribeToSelf();
}
address subscriptionRegistration = _registrations[subscription];
if (subscriptionRegistration == address(0)) {
revert NotRegistered(subscription);
}
if (subscriptionRegistration != subscription) {
revert CannotSubscribeToRegistrantWithSubscription(subscription);
}
_registrations[registrant] = subscription;
_subscribers[subscription].add(registrant);
emit RegistrationUpdated(registrant, true);
emit SubscriptionUpdated(registrant, subscription, true);
}
/**
* @notice Registers an address with the registry and copies the filtered operators and codeHashes from another
* address without subscribing.
*/
function registerAndCopyEntries(address registrant, address registrantToCopy)
external
onlyAddressOrOwner(registrant)
{
if (registrantToCopy == registrant) {
revert CannotCopyFromSelf();
}
address registration = _registrations[registrant];
if (registration != address(0)) {
revert AlreadyRegistered();
}
address registrantRegistration = _registrations[registrantToCopy];
if (registrantRegistration == address(0)) {
revert NotRegistered(registrantToCopy);
}
_registrations[registrant] = registrant;
emit RegistrationUpdated(registrant, true);
_copyEntries(registrant, registrantToCopy);
}
/**
* @notice Update an operator address for a registered address - when filtered is true, the operator is filtered.
*/
function updateOperator(address registrant, address operator, bool filtered)
external
onlyAddressOrOwner(registrant)
{
address registration = _registrations[registrant];
if (registration == address(0)) {
revert NotRegistered(registrant);
}
if (registration != registrant) {
revert CannotUpdateWhileSubscribed(registration);
}
EnumerableSet.AddressSet storage filteredOperatorsRef = _filteredOperators[registrant];
if (!filtered) {
bool removed = filteredOperatorsRef.remove(operator);
if (!removed) {
revert AddressNotFiltered(operator);
}
} else {
bool added = filteredOperatorsRef.add(operator);
if (!added) {
revert AddressAlreadyFiltered(operator);
}
}
emit OperatorUpdated(registrant, operator, filtered);
}
/**
* @notice Update a codeHash for a registered address - when filtered is true, the codeHash is filtered.
*/
function updateCodeHash(address registrant, bytes32 codeHash, bool filtered)
external
onlyAddressOrOwner(registrant)
{
if (codeHash == EOA_CODEHASH) {
revert CannotFilterEOAs();
}
address registration = _registrations[registrant];
if (registration == address(0)) {
revert NotRegistered(registrant);
}
if (registration != registrant) {
revert CannotUpdateWhileSubscribed(registration);
}
EnumerableSet.Bytes32Set storage filteredCodeHashesRef = _filteredCodeHashes[registrant];
if (!filtered) {
bool removed = filteredCodeHashesRef.remove(codeHash);
if (!removed) {
revert CodeHashNotFiltered(codeHash);
}
} else {
bool added = filteredCodeHashesRef.add(codeHash);
if (!added) {
revert CodeHashAlreadyFiltered(codeHash);
}
}
emit CodeHashUpdated(registrant, codeHash, filtered);
}
/**
* @notice Update multiple operators for a registered address - when filtered is true, the operators will be filtered. Reverts on duplicates.
*/
function updateOperators(address registrant, address[] calldata operators, bool filtered)
external
onlyAddressOrOwner(registrant)
{
address registration = _registrations[registrant];
if (registration == address(0)) {
revert NotRegistered(registrant);
}
if (registration != registrant) {
revert CannotUpdateWhileSubscribed(registration);
}
EnumerableSet.AddressSet storage filteredOperatorsRef = _filteredOperators[registrant];
uint256 operatorsLength = operators.length;
unchecked {
if (!filtered) {
for (uint256 i = 0; i < operatorsLength; ++i) {
address operator = operators[i];
bool removed = filteredOperatorsRef.remove(operator);
if (!removed) {
revert AddressNotFiltered(operator);
}
}
} else {
for (uint256 i = 0; i < operatorsLength; ++i) {
address operator = operators[i];
bool added = filteredOperatorsRef.add(operator);
if (!added) {
revert AddressAlreadyFiltered(operator);
}
}
}
}
emit OperatorsUpdated(registrant, operators, filtered);
}
/**
* @notice Update multiple codeHashes for a registered address - when filtered is true, the codeHashes will be filtered. Reverts on duplicates.
*/
function updateCodeHashes(address registrant, bytes32[] calldata codeHashes, bool filtered)
external
onlyAddressOrOwner(registrant)
{
address registration = _registrations[registrant];
if (registration == address(0)) {
revert NotRegistered(registrant);
}
if (registration != registrant) {
revert CannotUpdateWhileSubscribed(registration);
}
EnumerableSet.Bytes32Set storage filteredCodeHashesRef = _filteredCodeHashes[registrant];
uint256 codeHashesLength = codeHashes.length;
unchecked {
if (!filtered) {
for (uint256 i = 0; i < codeHashesLength; ++i) {
bytes32 codeHash = codeHashes[i];
bool removed = filteredCodeHashesRef.remove(codeHash);
if (!removed) {
revert CodeHashNotFiltered(codeHash);
}
}
} else {
for (uint256 i = 0; i < codeHashesLength; ++i) {
bytes32 codeHash = codeHashes[i];
if (codeHash == EOA_CODEHASH) {
revert CannotFilterEOAs();
}
bool added = filteredCodeHashesRef.add(codeHash);
if (!added) {
revert CodeHashAlreadyFiltered(codeHash);
}
}
}
}
emit CodeHashesUpdated(registrant, codeHashes, filtered);
}
/**
* @notice Subscribe an address to another registrant's filtered operators and codeHashes. Will remove previous
* subscription if present.
* Note that accounts with subscriptions may go on to subscribe to other accounts - in this case,
* subscriptions will not be forwarded. Instead the former subscription's existing entries will still be
* used.
*/
function subscribe(address registrant, address newSubscription) external onlyAddressOrOwner(registrant) {
if (registrant == newSubscription) {
revert CannotSubscribeToSelf();
}
if (newSubscription == address(0)) {
revert CannotSubscribeToZeroAddress();
}
address registration = _registrations[registrant];
if (registration == address(0)) {
revert NotRegistered(registrant);
}
if (registration == newSubscription) {
revert AlreadySubscribed(newSubscription);
}
address newSubscriptionRegistration = _registrations[newSubscription];
if (newSubscriptionRegistration == address(0)) {
revert NotRegistered(newSubscription);
}
if (newSubscriptionRegistration != newSubscription) {
revert CannotSubscribeToRegistrantWithSubscription(newSubscription);
}
if (registration != registrant) {
_subscribers[registration].remove(registrant);
emit SubscriptionUpdated(registrant, registration, false);
}
_registrations[registrant] = newSubscription;
_subscribers[newSubscription].add(registrant);
emit SubscriptionUpdated(registrant, newSubscription, true);
}
/**
* @notice Unsubscribe an address from its current subscribed registrant, and optionally copy its filtered operators and codeHashes.
*/
function unsubscribe(address registrant, bool copyExistingEntries) external onlyAddressOrOwner(registrant) {
address registration = _registrations[registrant];
if (registration == address(0)) {
revert NotRegistered(registrant);
}
if (registration == registrant) {
revert NotSubscribed();
}
_subscribers[registration].remove(registrant);
_registrations[registrant] = registrant;
emit SubscriptionUpdated(registrant, registration, false);
if (copyExistingEntries) {
_copyEntries(registrant, registration);
}
}
/**
* @notice Copy filtered operators and codeHashes from a different registrantToCopy to addr.
*/
function copyEntriesOf(address registrant, address registrantToCopy) external onlyAddressOrOwner(registrant) {
if (registrant == registrantToCopy) {
revert CannotCopyFromSelf();
}
address registration = _registrations[registrant];
if (registration == address(0)) {
revert NotRegistered(registrant);
}
if (registration != registrant) {
revert CannotUpdateWhileSubscribed(registration);
}
address registrantRegistration = _registrations[registrantToCopy];
if (registrantRegistration == address(0)) {
revert NotRegistered(registrantToCopy);
}
_copyEntries(registrant, registrantToCopy);
}
/// @dev helper to copy entries from registrantToCopy to registrant and emit events
function _copyEntries(address registrant, address registrantToCopy) private {
EnumerableSet.AddressSet storage filteredOperatorsRef = _filteredOperators[registrantToCopy];
EnumerableSet.Bytes32Set storage filteredCodeHashesRef = _filteredCodeHashes[registrantToCopy];
uint256 filteredOperatorsLength = filteredOperatorsRef.length();
uint256 filteredCodeHashesLength = filteredCodeHashesRef.length();
unchecked {
for (uint256 i = 0; i < filteredOperatorsLength; ++i) {
address operator = filteredOperatorsRef.at(i);
bool added = _filteredOperators[registrant].add(operator);
if (added) {
emit OperatorUpdated(registrant, operator, true);
}
}
for (uint256 i = 0; i < filteredCodeHashesLength; ++i) {
bytes32 codehash = filteredCodeHashesRef.at(i);
bool added = _filteredCodeHashes[registrant].add(codehash);
if (added) {
emit CodeHashUpdated(registrant, codehash, true);
}
}
}
}
//////////////////
// VIEW METHODS //
//////////////////
/**
* @notice Get the subscription address of a given registrant, if any.
*/
function subscriptionOf(address registrant) external view returns (address subscription) {
subscription = _registrations[registrant];
if (subscription == address(0)) {
revert NotRegistered(registrant);
} else if (subscription == registrant) {
subscription = address(0);
}
}
/**
* @notice Get the set of addresses subscribed to a given registrant.
* Note that order is not guaranteed as updates are made.
*/
function subscribers(address registrant) external view returns (address[] memory) {
return _subscribers[registrant].values();
}
/**
* @notice Get the subscriber at a given index in the set of addresses subscribed to a given registrant.
* Note that order is not guaranteed as updates are made.
*/
function subscriberAt(address registrant, uint256 index) external view returns (address) {
return _subscribers[registrant].at(index);
}
/**
* @notice Returns true if operator is filtered by a given address or its subscription.
*/
function isOperatorFiltered(address registrant, address operator) external view returns (bool) {
address registration = _registrations[registrant];
if (registration != registrant) {
return _filteredOperators[registration].contains(operator);
}
return _filteredOperators[registrant].contains(operator);
}
/**
* @notice Returns true if a codeHash is filtered by a given address or its subscription.
*/
function isCodeHashFiltered(address registrant, bytes32 codeHash) external view returns (bool) {
address registration = _registrations[registrant];
if (registration != registrant) {
return _filteredCodeHashes[registration].contains(codeHash);
}
return _filteredCodeHashes[registrant].contains(codeHash);
}
/**
* @notice Returns true if the hash of an address's code is filtered by a given address or its subscription.
*/
function isCodeHashOfFiltered(address registrant, address operatorWithCode) external view returns (bool) {
bytes32 codeHash = operatorWithCode.codehash;
address registration = _registrations[registrant];
if (registration != registrant) {
return _filteredCodeHashes[registration].contains(codeHash);
}
return _filteredCodeHashes[registrant].contains(codeHash);
}
/**
* @notice Returns true if an address has registered
*/
function isRegistered(address registrant) external view returns (bool) {
return _registrations[registrant] != address(0);
}
/**
* @notice Returns a list of filtered operators for a given address or its subscription.
*/
function filteredOperators(address registrant) external view returns (address[] memory) {
address registration = _registrations[registrant];
if (registration != registrant) {
return _filteredOperators[registration].values();
}
return _filteredOperators[registrant].values();
}
/**
* @notice Returns the set of filtered codeHashes for a given address or its subscription.
* Note that order is not guaranteed as updates are made.
*/
function filteredCodeHashes(address registrant) external view returns (bytes32[] memory) {
address registration = _registrations[registrant];
if (registration != registrant) {
return _filteredCodeHashes[registration].values();
}
return _filteredCodeHashes[registrant].values();
}
/**
* @notice Returns the filtered operator at the given index of the set of filtered operators for a given address or
* its subscription.
* Note that order is not guaranteed as updates are made.
*/
function filteredOperatorAt(address registrant, uint256 index) external view returns (address) {
address registration = _registrations[registrant];
if (registration != registrant) {
return _filteredOperators[registration].at(index);
}
return _filteredOperators[registrant].at(index);
}
/**
* @notice Returns the filtered codeHash at the given index of the list of filtered codeHashes for a given address or
* its subscription.
* Note that order is not guaranteed as updates are made.
*/
function filteredCodeHashAt(address registrant, uint256 index) external view returns (bytes32) {
address registration = _registrations[registrant];
if (registration != registrant) {
return _filteredCodeHashes[registration].at(index);
}
return _filteredCodeHashes[registrant].at(index);
}
/// @dev Convenience method to compute the code hash of an arbitrary contract
function codeHashOf(address a) external view returns (bytes32) {
return a.codehash;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;
contract OperatorFilterRegistryErrorsAndEvents {
error CannotFilterEOAs();
error AddressAlreadyFiltered(address operator);
error AddressNotFiltered(address operator);
error CodeHashAlreadyFiltered(bytes32 codeHash);
error CodeHashNotFiltered(bytes32 codeHash);
error OnlyAddressOrOwner();
error NotRegistered(address registrant);
error AlreadyRegistered();
error AlreadySubscribed(address subscription);
error NotSubscribed();
error CannotUpdateWhileSubscribed(address subscription);
error CannotSubscribeToSelf();
error CannotSubscribeToZeroAddress();
error NotOwnable();
error AddressFiltered(address filtered);
error CodeHashFiltered(address account, bytes32 codeHash);
error CannotSubscribeToRegistrantWithSubscription(address registrant);
error CannotCopyFromSelf();
event RegistrationUpdated(address indexed registrant, bool indexed registered);
event OperatorUpdated(address indexed registrant, address indexed operator, bool indexed filtered);
event OperatorsUpdated(address indexed registrant, address[] operators, bool indexed filtered);
event CodeHashUpdated(address indexed registrant, bytes32 indexed codeHash, bool indexed filtered);
event CodeHashesUpdated(address indexed registrant, bytes32[] codeHashes, bool indexed filtered);
event SubscriptionUpdated(address indexed registrant, address indexed subscription, bool indexed subscribed);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import {Context} from "./Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
_checkOwner();
_;
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if the sender is not the owner.
*/
function _checkOwner() internal view virtual {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(
newOwner != address(0),
"Ownable: new owner is the zero address"
);
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./Ownable.sol";
/**
* @dev Contract module which provides access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership} and {acceptOwnership}.
*
* This module is used through inheritance. It will make available all functions
* from parent (Ownable).
*/
abstract contract Ownable2Step is Ownable {
address private _pendingOwner;
event OwnershipTransferStarted(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev Returns the address of the pending owner.
*/
function pendingOwner() public view virtual returns (address) {
return _pendingOwner;
}
/**
* @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner)
public
virtual
override
onlyOwner
{
_pendingOwner = newOwner;
emit OwnershipTransferStarted(owner(), newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual override {
delete _pendingOwner;
super._transferOwnership(newOwner);
}
/**
* @dev The new owner accepts the ownership transfer.
*/
function acceptOwnership() external {
address sender = _msgSender();
require(
pendingOwner() == sender,
"Ownable2Step: caller is not the new owner"
);
_transferOwnership(sender);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;
import {IOperatorFilterRegistry} from "./IOperatorFilterRegistry.sol";
import {Ownable2Step} from "./Ownable2Step.sol";
/**
* @title OwnedRegistrant
* @notice Ownable contract that registers itself with the OperatorFilterRegistry and administers its own entries,
* to facilitate a subscription whose ownership can be transferred.
*/
contract OwnedRegistrant is Ownable2Step {
address constant registry = 0x000000000000AAeB6D7670E522A718067333cd4E;
constructor(address _owner) {
IOperatorFilterRegistry(registry).register(address(this));
transferOwnership(_owner);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;
import {RevokableOperatorFilterer} from "./RevokableOperatorFilterer.sol";
/**
* @title RevokableDefaultOperatorFilterer
* @notice Inherits from RevokableOperatorFilterer and automatically subscribes to the default OpenSea subscription.
* Note that OpenSea will disable creator fee enforcement if filtered operators begin fulfilling orders
* on-chain, eg, if the registry is revoked or bypassed.
*/
abstract contract RevokableDefaultOperatorFilterer is RevokableOperatorFilterer {
address constant DEFAULT_SUBSCRIPTION = address(0x3cc6CddA760b79bAfa08dF41ECFA224f810dCeB6);
constructor() RevokableOperatorFilterer(0x000000000000AAeB6D7670E522A718067333cd4E, DEFAULT_SUBSCRIPTION, true) {}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;
import {UpdatableOperatorFilterer} from "./UpdatableOperatorFilterer.sol";
import {IOperatorFilterRegistry} from "./IOperatorFilterRegistry.sol";
/**
* @title RevokableOperatorFilterer
* @notice This contract is meant to allow contracts to permanently skip OperatorFilterRegistry checks if desired. The
* Registry itself has an "unregister" function, but if the contract is ownable, the owner can re-register at
* any point. As implemented, this abstract contract allows the contract owner to permanently skip the
* OperatorFilterRegistry checks by calling revokeOperatorFilterRegistry. Once done, the registry
* address cannot be further updated.
* Note that OpenSea will still disable creator fee enforcement if filtered operators begin fulfilling orders
* on-chain, eg, if the registry is revoked or bypassed.
*/
abstract contract RevokableOperatorFilterer is UpdatableOperatorFilterer {
error RegistryHasBeenRevoked();
error InitialRegistryAddressCannotBeZeroAddress();
bool public isOperatorFilterRegistryRevoked;
constructor(address _registry, address subscriptionOrRegistrantToCopy, bool subscribe)
UpdatableOperatorFilterer(_registry, subscriptionOrRegistrantToCopy, subscribe)
{
// don't allow creating a contract with a permanently revoked registry
if (_registry == address(0)) {
revert InitialRegistryAddressCannotBeZeroAddress();
}
}
function _checkFilterOperator(address operator) internal view virtual override {
if (address(operatorFilterRegistry) != address(0)) {
super._checkFilterOperator(operator);
}
}
/**
* @notice Update the address that the contract will make OperatorFilter checks against. When set to the zero
* address, checks will be permanently bypassed, and the address cannot be updated again. OnlyOwner.
*/
function updateOperatorFilterRegistryAddress(address newRegistry) public override {
if (msg.sender != owner()) {
revert OnlyOwner();
}
// if registry has been revoked, do not allow further updates
if (isOperatorFilterRegistryRevoked) {
revert RegistryHasBeenRevoked();
}
operatorFilterRegistry = IOperatorFilterRegistry(newRegistry);
}
/**
* @notice Revoke the OperatorFilterRegistry address, permanently bypassing checks. OnlyOwner.
*/
function revokeOperatorFilterRegistry() public {
if (msg.sender != owner()) {
revert OnlyOwner();
}
// if registry has been revoked, do not allow further updates
if (isOperatorFilterRegistryRevoked) {
revert RegistryHasBeenRevoked();
}
// set to zero address to bypass checks
operatorFilterRegistry = IOperatorFilterRegistry(address(0));
isOperatorFilterRegistryRevoked = true;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;
import {IOperatorFilterRegistry} from "./IOperatorFilterRegistry.sol";
/**
* @title UpdatableOperatorFilterer
* @notice Abstract contract whose constructor automatically registers and optionally subscribes to or copies another
* registrant's entries in the OperatorFilterRegistry. This contract allows the Owner to update the
* OperatorFilterRegistry address via updateOperatorFilterRegistryAddress, including to the zero address,
* which will bypass registry checks.
* Note that OpenSea will still disable creator fee enforcement if filtered operators begin fulfilling orders
* on-chain, eg, if the registry is revoked or bypassed.
* @dev This smart contract is meant to be inherited by token contracts so they can use the following:
* - `onlyAllowedOperator` modifier for `transferFrom` and `safeTransferFrom` methods.
* - `onlyAllowedOperatorApproval` modifier for `approve` and `setApprovalForAll` methods.
*/
abstract contract UpdatableOperatorFilterer {
error OperatorNotAllowed(address operator);
error OnlyOwner();
IOperatorFilterRegistry public operatorFilterRegistry;
constructor(address _registry, address subscriptionOrRegistrantToCopy, bool subscribe) {
IOperatorFilterRegistry registry = IOperatorFilterRegistry(_registry);
operatorFilterRegistry = registry;
// If an inheriting token contract is deployed to a network without the registry deployed, the modifier
// will not revert, but the contract will need to be registered with the registry once it is deployed in
// order for the modifier to filter addresses.
if (address(registry).code.length > 0) {
if (subscribe) {
registry.registerAndSubscribe(address(this), subscriptionOrRegistrantToCopy);
} else {
if (subscriptionOrRegistrantToCopy != address(0)) {
registry.registerAndCopyEntries(address(this), subscriptionOrRegistrantToCopy);
} else {
registry.register(address(this));
}
}
}
}
modifier onlyAllowedOperator(address from) virtual {
// Allow spending tokens from addresses with balance
// Note that this still allows listings and marketplaces with escrow to transfer tokens if transferred
// from an EOA.
if (from != msg.sender) {
_checkFilterOperator(msg.sender);
}
_;
}
modifier onlyAllowedOperatorApproval(address operator) virtual {
_checkFilterOperator(operator);
_;
}
/**
* @notice Update the address that the contract will make OperatorFilter checks against. When set to the zero
* address, checks will be bypassed. OnlyOwner.
*/
function updateOperatorFilterRegistryAddress(address newRegistry) public virtual {
if (msg.sender != owner()) {
revert OnlyOwner();
}
operatorFilterRegistry = IOperatorFilterRegistry(newRegistry);
}
/**
* @dev assume the contract has an owner, but leave specific Ownable implementation up to inheriting contract
*/
function owner() public view virtual returns (address);
function _checkFilterOperator(address operator) internal view virtual {
IOperatorFilterRegistry registry = operatorFilterRegistry;
// Check registry code length to facilitate testing in environments without a deployed registry.
if (address(registry) != address(0) && address(registry).code.length > 0) {
if (!registry.isOperatorAllowed(address(this), operator)) {
revert OperatorNotAllowed(operator);
}
}
}
}
