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OpenSeaOverview
Max Total Supply
3,333 C4TZ
Holders
365
Market
Volume (24H)
N/A
Min Price (24H)
N/A
Max Price (24H)
N/A
Other Info
Token Contract
Balance
10 C4TZLoading...
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Loading...
Loading
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| # | Exchange | Pair | Price | 24H Volume | % Volume |
|---|
Contract Name:
C4TZC4TZ
Compiler Version
v0.8.17+commit.8df45f5f
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
/*
CCCCCCCCCCCCC 444444444 TTTTTTTTTTTTTTTTTTTTTTTZZZZZZZZZZZZZZZZZZZ CCCCCCCCCCCCC 444444444 TTTTTTTTTTTTTTTTTTTTTTTZZZZZZZZZZZZZZZZZZZ
CCC::::::::::::C 4::::::::4 T:::::::::::::::::::::TZ:::::::::::::::::Z CCC::::::::::::C 4::::::::4 T:::::::::::::::::::::TZ:::::::::::::::::Z
CC:::::::::::::::C 4:::::::::4 T:::::::::::::::::::::TZ:::::::::::::::::Z CC:::::::::::::::C 4:::::::::4 T:::::::::::::::::::::TZ:::::::::::::::::Z
C:::::CCCCCCCC::::C 4::::44::::4 T:::::TT:::::::TT:::::TZ:::ZZZZZZZZ:::::Z C:::::CCCCCCCC::::C 4::::44::::4 T:::::TT:::::::TT:::::TZ:::ZZZZZZZZ:::::Z
C:::::C CCCCCC 4::::4 4::::4 TTTTTT T:::::T TTTTTTZZZZZ Z:::::Z C:::::C CCCCCC 4::::4 4::::4 TTTTTT T:::::T TTTTTTZZZZZ Z:::::Z
C:::::C 4::::4 4::::4 T:::::T Z:::::Z C:::::C 4::::4 4::::4 T:::::T Z:::::Z
C:::::C 4::::4 4::::4 T:::::T Z:::::Z C:::::C 4::::4 4::::4 T:::::T Z:::::Z
C:::::C 4::::444444::::444 T:::::T Z:::::Z C:::::C 4::::444444::::444 T:::::T Z:::::Z
C:::::C 4::::::::::::::::4 T:::::T Z:::::Z C:::::C 4::::::::::::::::4 T:::::T Z:::::Z
C:::::C 4444444444:::::444 T:::::T Z:::::Z C:::::C 4444444444:::::444 T:::::T Z:::::Z
C:::::C 4::::4 T:::::T Z:::::Z C:::::C 4::::4 T:::::T Z:::::Z
C:::::C CCCCCC 4::::4 T:::::T ZZZ:::::Z ZZZZZ C:::::C CCCCCC 4::::4 T:::::T ZZZ:::::Z ZZZZZ
C:::::CCCCCCCC::::C 4::::4 TT:::::::TT Z::::::ZZZZZZZZ:::Z C:::::CCCCCCCC::::C 4::::4 TT:::::::TT Z::::::ZZZZZZZZ:::Z
CC:::::::::::::::C 44::::::44 T:::::::::T Z:::::::::::::::::Z CC:::::::::::::::C 44::::::44 T:::::::::T Z:::::::::::::::::Z
CCC::::::::::::C 4::::::::4 T:::::::::T Z:::::::::::::::::Z CCC::::::::::::C 4::::::::4 T:::::::::T Z:::::::::::::::::Z
CCCCCCCCCCCCC 4444444444 TTTTTTTTTTT ZZZZZZZZZZZZZZZZZZZ CCCCCCCCCCCCC 4444444444 TTTTTTTTTTT ZZZZZZZZZZZZZZZZZZZ
/ C4TZ C4TZ is an exciting new NFT project that combines the worlds of fashion, art, and blockchain technology.
/ By : AnonTeam
/ Claim one free C4TZ Rest 0.002E
*/
// SPDX-License-Identifier: MIT
// File: @openzeppelin/contracts/utils/structs/EnumerableSet.sol
// OpenZeppelin Contracts (last updated v4.8.0) (utils/structs/EnumerableSet.sol)
// This file was procedurally generated from scripts/generate/templates/EnumerableSet.js.
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;
}
}
// File: contracts/IOperatorFilterRegistry.sol
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);
}
// File: contracts/OperatorFilterer.sol
// OpenZeppelin Contracts (last updated v4.8.0) (access/Ownable2Step.sol)
pragma solidity ^0.8.0;
/**
* @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).
*/
pragma solidity ^0.8.13;
/**
* @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.
*/
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);
}
pragma solidity ^0.8.13;
/**
* @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;
}
}
pragma solidity ^0.8.13;
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);
}
}
}
}
// File: contracts/DefaultOperatorFilterer.sol
pragma solidity ^0.8.13;
/**
* @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) {}
}
// File: @openzeppelin/contracts/utils/math/Math.sol
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/Math.sol)
pragma solidity ^0.8.0;
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
enum Rounding {
Down, // Toward negative infinity
Up, // Toward infinity
Zero // Toward zero
}
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a > b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow.
return (a & b) + (a ^ b) / 2;
}
/**
* @dev Returns the ceiling of the division of two numbers.
*
* This differs from standard division with `/` in that it rounds up instead
* of rounding down.
*/
function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b - 1) / b can overflow on addition, so we distribute.
return a == 0 ? 0 : (a - 1) / b + 1;
}
/**
* @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
* @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
* with further edits by Uniswap Labs also under MIT license.
*/
function mulDiv(
uint256 x,
uint256 y,
uint256 denominator
) internal pure returns (uint256 result) {
unchecked {
// 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
// use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
// variables such that product = prod1 * 2^256 + prod0.
uint256 prod0; // Least significant 256 bits of the product
uint256 prod1; // Most significant 256 bits of the product
assembly {
let mm := mulmod(x, y, not(0))
prod0 := mul(x, y)
prod1 := sub(sub(mm, prod0), lt(mm, prod0))
}
// Handle non-overflow cases, 256 by 256 division.
if (prod1 == 0) {
return prod0 / denominator;
}
// Make sure the result is less than 2^256. Also prevents denominator == 0.
require(denominator > prod1);
///////////////////////////////////////////////
// 512 by 256 division.
///////////////////////////////////////////////
// Make division exact by subtracting the remainder from [prod1 prod0].
uint256 remainder;
assembly {
// Compute remainder using mulmod.
remainder := mulmod(x, y, denominator)
// Subtract 256 bit number from 512 bit number.
prod1 := sub(prod1, gt(remainder, prod0))
prod0 := sub(prod0, remainder)
}
// Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
// See https://cs.stackexchange.com/q/138556/92363.
// Does not overflow because the denominator cannot be zero at this stage in the function.
uint256 twos = denominator & (~denominator + 1);
assembly {
// Divide denominator by twos.
denominator := div(denominator, twos)
// Divide [prod1 prod0] by twos.
prod0 := div(prod0, twos)
// Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
twos := add(div(sub(0, twos), twos), 1)
}
// Shift in bits from prod1 into prod0.
prod0 |= prod1 * twos;
// Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
// that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
// four bits. That is, denominator * inv = 1 mod 2^4.
uint256 inverse = (3 * denominator) ^ 2;
// Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
// in modular arithmetic, doubling the correct bits in each step.
inverse *= 2 - denominator * inverse; // inverse mod 2^8
inverse *= 2 - denominator * inverse; // inverse mod 2^16
inverse *= 2 - denominator * inverse; // inverse mod 2^32
inverse *= 2 - denominator * inverse; // inverse mod 2^64
inverse *= 2 - denominator * inverse; // inverse mod 2^128
inverse *= 2 - denominator * inverse; // inverse mod 2^256
// Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
// This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
// less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
// is no longer required.
result = prod0 * inverse;
return result;
}
}
/**
* @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
*/
function mulDiv(
uint256 x,
uint256 y,
uint256 denominator,
Rounding rounding
) internal pure returns (uint256) {
uint256 result = mulDiv(x, y, denominator);
if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
result += 1;
}
return result;
}
/**
* @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
*
* Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
*/
function sqrt(uint256 a) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
// For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
//
// We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
// `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
//
// This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
// → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
// → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
//
// Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
uint256 result = 1 << (log2(a) >> 1);
// At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
// since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
// every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
// into the expected uint128 result.
unchecked {
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
return min(result, a / result);
}
}
/**
* @notice Calculates sqrt(a), following the selected rounding direction.
*/
function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = sqrt(a);
return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
}
}
/**
* @dev Return the log in base 2, rounded down, of a positive value.
* Returns 0 if given 0.
*/
function log2(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >> 128 > 0) {
value >>= 128;
result += 128;
}
if (value >> 64 > 0) {
value >>= 64;
result += 64;
}
if (value >> 32 > 0) {
value >>= 32;
result += 32;
}
if (value >> 16 > 0) {
value >>= 16;
result += 16;
}
if (value >> 8 > 0) {
value >>= 8;
result += 8;
}
if (value >> 4 > 0) {
value >>= 4;
result += 4;
}
if (value >> 2 > 0) {
value >>= 2;
result += 2;
}
if (value >> 1 > 0) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 2, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log2(value);
return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
}
}
/**
* @dev Return the log in base 10, rounded down, of a positive value.
* Returns 0 if given 0.
*/
function log10(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >= 10**64) {
value /= 10**64;
result += 64;
}
if (value >= 10**32) {
value /= 10**32;
result += 32;
}
if (value >= 10**16) {
value /= 10**16;
result += 16;
}
if (value >= 10**8) {
value /= 10**8;
result += 8;
}
if (value >= 10**4) {
value /= 10**4;
result += 4;
}
if (value >= 10**2) {
value /= 10**2;
result += 2;
}
if (value >= 10**1) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 10, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log10(value);
return result + (rounding == Rounding.Up && 10**result < value ? 1 : 0);
}
}
/**
* @dev Return the log in base 256, rounded down, of a positive value.
* Returns 0 if given 0.
*
* Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
*/
function log256(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >> 128 > 0) {
value >>= 128;
result += 16;
}
if (value >> 64 > 0) {
value >>= 64;
result += 8;
}
if (value >> 32 > 0) {
value >>= 32;
result += 4;
}
if (value >> 16 > 0) {
value >>= 16;
result += 2;
}
if (value >> 8 > 0) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 10, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log256(value);
return result + (rounding == Rounding.Up && 1 << (result * 8) < value ? 1 : 0);
}
}
}
// File: @openzeppelin/contracts/utils/Strings.sol
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _SYMBOLS = "0123456789abcdef";
uint8 private constant _ADDRESS_LENGTH = 20;
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
unchecked {
uint256 length = Math.log10(value) + 1;
string memory buffer = new string(length);
uint256 ptr;
/// @solidity memory-safe-assembly
assembly {
ptr := add(buffer, add(32, length))
}
while (true) {
ptr--;
/// @solidity memory-safe-assembly
assembly {
mstore8(ptr, byte(mod(value, 10), _SYMBOLS))
}
value /= 10;
if (value == 0) break;
}
return buffer;
}
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
unchecked {
return toHexString(value, Math.log256(value) + 1);
}
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed 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] = _SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
/**
* @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
*/
function toHexString(address addr) internal pure returns (string memory) {
return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
}
}
// File: @openzeppelin/contracts/utils/Address.sol
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
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");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
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");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
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");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
* the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
*
* _Available since v4.8._
*/
function verifyCallResultFromTarget(
address target,
bool success,
bytes memory returndata,
string memory errorMessage
) internal view returns (bytes memory) {
if (success) {
if (returndata.length == 0) {
// only check isContract if the call was successful and the return data is empty
// otherwise we already know that it was a contract
require(isContract(target), "Address: call to non-contract");
}
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
/**
* @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason or using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
function _revert(bytes memory returndata, string memory errorMessage) private pure {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
/// @solidity memory-safe-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol)
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File: @openzeppelin/contracts/utils/introspection/IERC165.sol
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
// File: @openzeppelin/contracts/utils/introspection/ERC165.sol
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721.sol
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external ;
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721
* or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must
* understand this adds an external call which potentially creates a reentrancy vulnerability.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File: @openzeppelin/contracts/utils/Context.sol
pragma solidity ^0.8.0;
interface IERC721Enumerable is IERC721 {
function totalSupply() external view returns (uint256);
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256);
function tokenByIndex(uint256 index) external view returns (uint256);
}
pragma solidity ^0.8.0;
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;
}
}
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
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;
}
}
// File: @openzeppelin/contracts/token/ERC721/ERC721.sol
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC721/ERC721.sol)
pragma solidity ^0.8.0;
// File: @openzeppelin/contracts/access/Ownable.sol
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)
pragma solidity ^0.8.0;
contract ERC721A is Context, ERC165, IERC721, IERC721Metadata, IERC721Enumerable, DefaultOperatorFilterer {
using Address for address;
using Strings for uint256;
struct TokenOwnership {
address addr;
uint64 startTimestamp;
}
struct AddressData {
uint128 balance;
uint128 numberMinted;
}
uint256 internal currentIndex;
string private _name;
string private _symbol;
mapping(uint256 => TokenOwnership) internal _ownerships;
mapping(address => AddressData) private _addressData;
mapping(uint256 => address) private _tokenApprovals;
mapping(address => mapping(address => bool)) private _operatorApprovals;
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
function totalSupply() public view override returns (uint256) {
return currentIndex;
}
function tokenByIndex(uint256 index) public view override returns (uint256) {
require(index < totalSupply(), "ERC721A: global index out of bounds");
return index;
}
function tokenOfOwnerByIndex(address owner, uint256 index) public view override returns (uint256) {
require(index < balanceOf(owner), "ERC721A: owner index out of bounds");
uint256 numMintedSoFar = totalSupply();
uint256 tokenIdsIdx;
address currOwnershipAddr;
unchecked {
for (uint256 i; i < numMintedSoFar; i++) {
TokenOwnership memory ownership = _ownerships[i];
if (ownership.addr != address(0)) {
currOwnershipAddr = ownership.addr;
}
if (currOwnershipAddr == owner) {
if (tokenIdsIdx == index) {
return i;
}
tokenIdsIdx++;
}
}
}
revert("ERC721A: unable to get token of owner by index");
}
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
interfaceId == type(IERC721Enumerable).interfaceId ||
super.supportsInterface(interfaceId);
}
function balanceOf(address owner) public view override returns (uint256) {
require(owner != address(0), "ERC721A: balance query for the zero address");
return uint256(_addressData[owner].balance);
}
function _numberMinted(address owner) internal view returns (uint256) {
require(owner != address(0), "ERC721A: number minted query for the zero address");
return uint256(_addressData[owner].numberMinted);
}
function ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) {
require(_exists(tokenId), "ERC721A: owner query for nonexistent token");
unchecked {
for (uint256 curr = tokenId; curr >= 0; curr--) {
TokenOwnership memory ownership = _ownerships[curr];
if (ownership.addr != address(0)) {
return ownership;
}
}
}
revert("ERC721A: unable to determine the owner of token");
}
function ownerOf(uint256 tokenId) public view override returns (address) {
return ownershipOf(tokenId).addr;
}
function name() public view virtual override returns (string memory) {
return _name;
}
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length != 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
function _baseURI() internal view virtual returns (string memory) {
return "";
}
function approve(address to, uint256 tokenId) public virtual override onlyAllowedOperator(to) {
address owner = ERC721A.ownerOf(tokenId);
require(to != owner, "ERC721A: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721A: approve caller is not owner nor approved for all"
);
_approve(to, tokenId, owner);
}
function getApproved(uint256 tokenId) public view override returns (address) {
require(_exists(tokenId), "ERC721A: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
function setApprovalForAll(address operator, bool approved) public virtual override onlyAllowedOperator(operator) {
require(operator != _msgSender(), "ERC721A: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override onlyAllowedOperator(from){
_transfer(from, to, tokenId);
}
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override onlyAllowedOperator(from) {
safeTransferFrom(from, to, tokenId, "");
}
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override onlyAllowedOperator(from){
_transfer(from, to, tokenId);
require(
_checkOnERC721Received(from, to, tokenId, _data),
"ERC721A: transfer to non ERC721Receiver implementer"
);
}
function _exists(uint256 tokenId) internal view returns (bool) {
return tokenId < currentIndex;
}
function _safeMint(address to, uint256 quantity) internal {
_safeMint(to, quantity, "");
}
function _safeMint(
address to,
uint256 quantity,
bytes memory _data
) internal {
_mint(to, quantity, _data, true);
}
function _mint(
address to,
uint256 quantity,
bytes memory _data,
bool safe
) internal {
uint256 startTokenId = currentIndex;
require(to != address(0), "ERC721A: mint to the zero address");
require(quantity != 0, "ERC721A: quantity must be greater than 0");
_beforeTokenTransfers(address(0), to, startTokenId, quantity);
unchecked {
_addressData[to].balance += uint128(quantity);
_addressData[to].numberMinted += uint128(quantity);
_ownerships[startTokenId].addr = to;
_ownerships[startTokenId].startTimestamp = uint64(block.timestamp);
uint256 updatedIndex = startTokenId;
for (uint256 i; i < quantity; i++) {
emit Transfer(address(0), to, updatedIndex);
if (safe) {
require(
_checkOnERC721Received(address(0), to, updatedIndex, _data),
"ERC721A: transfer to non ERC721Receiver implementer"
);
}
updatedIndex++;
}
currentIndex = updatedIndex;
}
_afterTokenTransfers(address(0), to, startTokenId, quantity);
}
function _transfer(
address from,
address to,
uint256 tokenId
) private {
TokenOwnership memory prevOwnership = ownershipOf(tokenId);
bool isApprovedOrOwner = (_msgSender() == prevOwnership.addr ||
getApproved(tokenId) == _msgSender() ||
isApprovedForAll(prevOwnership.addr, _msgSender()));
require(isApprovedOrOwner, "ERC721A: transfer caller is not owner nor approved");
require(prevOwnership.addr == from, "ERC721A: transfer from incorrect owner");
require(to != address(0), "ERC721A: transfer to the zero address");
_beforeTokenTransfers(from, to, tokenId, 1);
_approve(address(0), tokenId, prevOwnership.addr);
unchecked {
_addressData[from].balance -= 1;
_addressData[to].balance += 1;
_ownerships[tokenId].addr = to;
_ownerships[tokenId].startTimestamp = uint64(block.timestamp);
uint256 nextTokenId = tokenId + 1;
if (_ownerships[nextTokenId].addr == address(0)) {
if (_exists(nextTokenId)) {
_ownerships[nextTokenId].addr = prevOwnership.addr;
_ownerships[nextTokenId].startTimestamp = prevOwnership.startTimestamp;
}
}
}
emit Transfer(from, to, tokenId);
_afterTokenTransfers(from, to, tokenId, 1);
}
function _approve(
address to,
uint256 tokenId,
address owner
) private {
_tokenApprovals[tokenId] = to;
emit Approval(owner, to, tokenId);
}
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
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("ERC721A: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
function _beforeTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
function _afterTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
}
/**
* @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);
}
}
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);
}
}
contract OwnedRegistrant is Ownable2Step {
address constant registry = 0x000000000000AAeB6D7670E522A718067333cd4E;
constructor(address _owner) {
IOperatorFilterRegistry(registry).register(address(this));
transferOwnership(_owner);
}
}
pragma solidity ^0.8.13;
/**
* @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);
}
}
}
}
pragma solidity ^0.8.13;
/**
* @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;
}
}
pragma solidity ^0.8.13;
/**
* @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) {}
}
/*
CCCCCCCCCCCCC 444444444 TTTTTTTTTTTTTTTTTTTTTTTZZZZZZZZZZZZZZZZZZZ CCCCCCCCCCCCC 444444444 TTTTTTTTTTTTTTTTTTTTTTTZZZZZZZZZZZZZZZZZZZ
CCC::::::::::::C 4::::::::4 T:::::::::::::::::::::TZ:::::::::::::::::Z CCC::::::::::::C 4::::::::4 T:::::::::::::::::::::TZ:::::::::::::::::Z
CC:::::::::::::::C 4:::::::::4 T:::::::::::::::::::::TZ:::::::::::::::::Z CC:::::::::::::::C 4:::::::::4 T:::::::::::::::::::::TZ:::::::::::::::::Z
C:::::CCCCCCCC::::C 4::::44::::4 T:::::TT:::::::TT:::::TZ:::ZZZZZZZZ:::::Z C:::::CCCCCCCC::::C 4::::44::::4 T:::::TT:::::::TT:::::TZ:::ZZZZZZZZ:::::Z
C:::::C CCCCCC 4::::4 4::::4 TTTTTT T:::::T TTTTTTZZZZZ Z:::::Z C:::::C CCCCCC 4::::4 4::::4 TTTTTT T:::::T TTTTTTZZZZZ Z:::::Z
C:::::C 4::::4 4::::4 T:::::T Z:::::Z C:::::C 4::::4 4::::4 T:::::T Z:::::Z
C:::::C 4::::4 4::::4 T:::::T Z:::::Z C:::::C 4::::4 4::::4 T:::::T Z:::::Z
C:::::C 4::::444444::::444 T:::::T Z:::::Z C:::::C 4::::444444::::444 T:::::T Z:::::Z
C:::::C 4::::::::::::::::4 T:::::T Z:::::Z C:::::C 4::::::::::::::::4 T:::::T Z:::::Z
C:::::C 4444444444:::::444 T:::::T Z:::::Z C:::::C 4444444444:::::444 T:::::T Z:::::Z
C:::::C 4::::4 T:::::T Z:::::Z C:::::C 4::::4 T:::::T Z:::::Z
C:::::C CCCCCC 4::::4 T:::::T ZZZ:::::Z ZZZZZ C:::::C CCCCCC 4::::4 T:::::T ZZZ:::::Z ZZZZZ
C:::::CCCCCCCC::::C 4::::4 TT:::::::TT Z::::::ZZZZZZZZ:::Z C:::::CCCCCCCC::::C 4::::4 TT:::::::TT Z::::::ZZZZZZZZ:::Z
CC:::::::::::::::C 44::::::44 T:::::::::T Z:::::::::::::::::Z CC:::::::::::::::C 44::::::44 T:::::::::T Z:::::::::::::::::Z
CCC::::::::::::C 4::::::::4 T:::::::::T Z:::::::::::::::::Z CCC::::::::::::C 4::::::::4 T:::::::::T Z:::::::::::::::::Z
CCCCCCCCCCCCC 4444444444 TTTTTTTTTTT ZZZZZZZZZZZZZZZZZZZ CCCCCCCCCCCCC 4444444444 TTTTTTTTTTT ZZZZZZZZZZZZZZZZZZZ
/ C4TZ C4TZ is an exciting new NFT project that combines the worlds of fashion, art, and blockchain technology.
/ By : AnonTeam
/ Claim one free C4TZ Rest 0.002E
*/
pragma solidity ^0.8.9;
contract C4TZC4TZ is ERC721A, Ownable, ReentrancyGuard {
using Strings for uint256;
uint public price = 0.002 ether;
uint public maxTx = 10;
uint public maxSupply = 3333;
uint256 public reservedSupply = 3333;
string private baseURI = "ipfs://bafybeia7zfj77ntddz7g5bvpe4uhzmmykxg5gdvwj6gltpayss2ai3fg5i/";
bool public mintEnabled = true;
uint public maxPerFree = 1;
uint public totalFreeMinted = 0;
uint public totalFree = 1111;
mapping(address => uint256) public _FreeMinted;
constructor() ERC721A("C4TZ C4TZ", "C4TZ") {}
function tokenURI(uint256 _tokenId) public view virtual override returns (string memory) {
require(_exists(_tokenId),"ERC721Metadata: URI query for nonexistent token");
string memory currentBaseURI = _baseURI();
return bytes(currentBaseURI).length > 0
? string(abi.encodePacked(currentBaseURI,Strings.toString(_tokenId),".json"))
: "";
}
function _baseURI() internal view virtual override returns (string memory) {
return baseURI;
}
function C4TZ(uint256 count) external payable {
bool MintForFree = ((totalFreeMinted < totalFree) &&
(_FreeMinted[msg.sender] < maxPerFree));
if (MintForFree) {
require(mintEnabled, "Mint is not live yet");
require(totalSupply() + count <= maxSupply, "No more");
require(count <= maxTx, "Max per TX reached.");
if(count >= (maxPerFree - _FreeMinted[msg.sender]))
{
require(msg.value >= (count * price) - ((maxPerFree - _FreeMinted[msg.sender]) * price), "Please send the exact ETH amount");
_FreeMinted[msg.sender] = maxPerFree;
totalFreeMinted += maxPerFree;
}
else if(count < (maxPerFree - _FreeMinted[msg.sender]))
{
require(msg.value >= 0, "Please send the exact ETH amount");
_FreeMinted[msg.sender] += count;
totalFreeMinted += count;
}
}
else{
require(mintEnabled, "Mint is not live yet");
require(msg.value >= count * price, "Please send the exact ETH amount");
require(totalSupply() + count <= maxSupply, "No more");
require(count <= maxTx, "Max per TX reached.");
}
_safeMint(msg.sender, count);
}
function C4TZz(uint256 Amount) external onlyOwner
{
uint256 Remaining = reservedSupply;
require(totalSupply() + Amount <= maxSupply, "No more supply to be minted");
require(Remaining >= Amount, "Reserved Supply Minted");
reservedSupply = Remaining - Amount;
_safeMint(msg.sender, Amount);
// totalSupply() += Amount;
}
function EnableC4TZ() external onlyOwner {
mintEnabled = !mintEnabled;
}
function setBaseUri(string memory baseuri_) public onlyOwner {
baseURI = baseuri_;
}
function setCost(uint256 price_) external onlyOwner {
price = price_;
}
function setmaxTx(uint256 _MaxTx) external onlyOwner {
maxTx = _MaxTx;
}
function setMaxTotalFree(uint256 MaxTotalFree_) external onlyOwner {
totalFree = MaxTotalFree_;
}
function setMaxPerFree(uint256 MaxPerFree_) external onlyOwner {
maxPerFree = MaxPerFree_;
}
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);
}
function withdraw() external onlyOwner nonReentrant {
(bool success, ) = msg.sender.call{value: address(this).balance}("");
require(success, "Transfer failed.");
}
}{
"optimizer": {
"enabled": true,
"runs": 200
},
"outputSelection": {
"*": {
"*": [
"evm.bytecode",
"evm.deployedBytecode",
"devdoc",
"userdoc",
"metadata",
"abi"
]
}
}
}Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
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ty":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_tokenId","type":"uint256"}],"name":"tokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalFree","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalFreeMinted","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"transferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]Contract Creation Code
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