// SPDX-License-Identifier: MIT// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)pragmasolidity ^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.
*/abstractcontractContext{
function_msgSender() internalviewvirtualreturns (address) {
returnmsg.sender;
}
function_msgData() internalviewvirtualreturns (bytescalldata) {
returnmsg.data;
}
}
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.7.2) (utils/introspection/ERC165Checker.sol)pragmasolidity ^0.8.0;import"./IERC165.sol";
/**
* @dev Library used to query support of an interface declared via {IERC165}.
*
* Note that these functions return the actual result of the query: they do not
* `revert` if an interface is not supported. It is up to the caller to decide
* what to do in these cases.
*/libraryERC165Checker{
// As per the EIP-165 spec, no interface should ever match 0xffffffffbytes4privateconstant _INTERFACE_ID_INVALID =0xffffffff;
/**
* @dev Returns true if `account` supports the {IERC165} interface,
*/functionsupportsERC165(address account) internalviewreturns (bool) {
// Any contract that implements ERC165 must explicitly indicate support of// InterfaceId_ERC165 and explicitly indicate non-support of InterfaceId_Invalidreturn
_supportsERC165Interface(account, type(IERC165).interfaceId) &&!_supportsERC165Interface(account, _INTERFACE_ID_INVALID);
}
/**
* @dev Returns true if `account` supports the interface defined by
* `interfaceId`. Support for {IERC165} itself is queried automatically.
*
* See {IERC165-supportsInterface}.
*/functionsupportsInterface(address account, bytes4 interfaceId) internalviewreturns (bool) {
// query support of both ERC165 as per the spec and support of _interfaceIdreturn supportsERC165(account) && _supportsERC165Interface(account, interfaceId);
}
/**
* @dev Returns a boolean array where each value corresponds to the
* interfaces passed in and whether they're supported or not. This allows
* you to batch check interfaces for a contract where your expectation
* is that some interfaces may not be supported.
*
* See {IERC165-supportsInterface}.
*
* _Available since v3.4._
*/functiongetSupportedInterfaces(address account, bytes4[] memory interfaceIds)
internalviewreturns (bool[] memory)
{
// an array of booleans corresponding to interfaceIds and whether they're supported or notbool[] memory interfaceIdsSupported =newbool[](interfaceIds.length);
// query support of ERC165 itselfif (supportsERC165(account)) {
// query support of each interface in interfaceIdsfor (uint256 i =0; i < interfaceIds.length; i++) {
interfaceIdsSupported[i] = _supportsERC165Interface(account, interfaceIds[i]);
}
}
return interfaceIdsSupported;
}
/**
* @dev Returns true if `account` supports all the interfaces defined in
* `interfaceIds`. Support for {IERC165} itself is queried automatically.
*
* Batch-querying can lead to gas savings by skipping repeated checks for
* {IERC165} support.
*
* See {IERC165-supportsInterface}.
*/functionsupportsAllInterfaces(address account, bytes4[] memory interfaceIds) internalviewreturns (bool) {
// query support of ERC165 itselfif (!supportsERC165(account)) {
returnfalse;
}
// query support of each interface in _interfaceIdsfor (uint256 i =0; i < interfaceIds.length; i++) {
if (!_supportsERC165Interface(account, interfaceIds[i])) {
returnfalse;
}
}
// all interfaces supportedreturntrue;
}
/**
* @notice Query if a contract implements an interface, does not check ERC165 support
* @param account The address of the contract to query for support of an interface
* @param interfaceId The interface identifier, as specified in ERC-165
* @return true if the contract at account indicates support of the interface with
* identifier interfaceId, false otherwise
* @dev Assumes that account contains a contract that supports ERC165, otherwise
* the behavior of this method is undefined. This precondition can be checked
* with {supportsERC165}.
* Interface identification is specified in ERC-165.
*/function_supportsERC165Interface(address account, bytes4 interfaceId) privateviewreturns (bool) {
// prepare callbytesmemory encodedParams =abi.encodeWithSelector(IERC165.supportsInterface.selector, interfaceId);
// perform static callbool success;
uint256 returnSize;
uint256 returnValue;
assembly {
success :=staticcall(30000, account, add(encodedParams, 0x20), mload(encodedParams), 0x00, 0x20)
returnSize :=returndatasize()
returnValue :=mload(0x00)
}
return success && returnSize >=0x20&& returnValue >0;
}
}
Contract Source Code
File 4 of 10: ERC721A.sol
// SPDX-License-Identifier: MIT// ERC721A Contracts v4.2.3// Creator: Chiru Labspragmasolidity ^0.8.4;import'./IERC721A.sol';
/**
* @dev Interface of ERC721 token receiver.
*/interfaceERC721A__IERC721Receiver{
functiononERC721Received(address operator,
addressfrom,
uint256 tokenId,
bytescalldata data
) externalreturns (bytes4);
}
/**
* @title ERC721A
*
* @dev Implementation of the [ERC721](https://eips.ethereum.org/EIPS/eip-721)
* Non-Fungible Token Standard, including the Metadata extension.
* Optimized for lower gas during batch mints.
*
* Token IDs are minted in sequential order (e.g. 0, 1, 2, 3, ...)
* starting from `_startTokenId()`.
*
* Assumptions:
*
* - An owner cannot have more than 2**64 - 1 (max value of uint64) of supply.
* - The maximum token ID cannot exceed 2**256 - 1 (max value of uint256).
*/contractERC721AisIERC721A{
// Bypass for a `--via-ir` bug (https://github.com/chiru-labs/ERC721A/pull/364).structTokenApprovalRef {
address value;
}
// =============================================================// CONSTANTS// =============================================================// Mask of an entry in packed address data.uint256privateconstant _BITMASK_ADDRESS_DATA_ENTRY = (1<<64) -1;
// The bit position of `numberMinted` in packed address data.uint256privateconstant _BITPOS_NUMBER_MINTED =64;
// The bit position of `numberBurned` in packed address data.uint256privateconstant _BITPOS_NUMBER_BURNED =128;
// The bit position of `aux` in packed address data.uint256privateconstant _BITPOS_AUX =192;
// Mask of all 256 bits in packed address data except the 64 bits for `aux`.uint256privateconstant _BITMASK_AUX_COMPLEMENT = (1<<192) -1;
// The bit position of `startTimestamp` in packed ownership.uint256privateconstant _BITPOS_START_TIMESTAMP =160;
// The bit mask of the `burned` bit in packed ownership.uint256privateconstant _BITMASK_BURNED =1<<224;
// The bit position of the `nextInitialized` bit in packed ownership.uint256privateconstant _BITPOS_NEXT_INITIALIZED =225;
// The bit mask of the `nextInitialized` bit in packed ownership.uint256privateconstant _BITMASK_NEXT_INITIALIZED =1<<225;
// The bit position of `extraData` in packed ownership.uint256privateconstant _BITPOS_EXTRA_DATA =232;
// Mask of all 256 bits in a packed ownership except the 24 bits for `extraData`.uint256privateconstant _BITMASK_EXTRA_DATA_COMPLEMENT = (1<<232) -1;
// The mask of the lower 160 bits for addresses.uint256privateconstant _BITMASK_ADDRESS = (1<<160) -1;
// The maximum `quantity` that can be minted with {_mintERC2309}.// This limit is to prevent overflows on the address data entries.// For a limit of 5000, a total of 3.689e15 calls to {_mintERC2309}// is required to cause an overflow, which is unrealistic.uint256privateconstant _MAX_MINT_ERC2309_QUANTITY_LIMIT =5000;
// The `Transfer` event signature is given by:// `keccak256(bytes("Transfer(address,address,uint256)"))`.bytes32privateconstant _TRANSFER_EVENT_SIGNATURE =0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef;
// =============================================================// STORAGE// =============================================================// The next token ID to be minted.uint256private _currentIndex;
// The number of tokens burned.uint256private _burnCounter;
// Token namestringprivate _name;
// Token symbolstringprivate _symbol;
// Mapping from token ID to ownership details// An empty struct value does not necessarily mean the token is unowned.// See {_packedOwnershipOf} implementation for details.//// Bits Layout:// - [0..159] `addr`// - [160..223] `startTimestamp`// - [224] `burned`// - [225] `nextInitialized`// - [232..255] `extraData`mapping(uint256=>uint256) private _packedOwnerships;
// Mapping owner address to address data.//// Bits Layout:// - [0..63] `balance`// - [64..127] `numberMinted`// - [128..191] `numberBurned`// - [192..255] `aux`mapping(address=>uint256) private _packedAddressData;
// Mapping from token ID to approved address.mapping(uint256=> TokenApprovalRef) private _tokenApprovals;
// Mapping from owner to operator approvalsmapping(address=>mapping(address=>bool)) private _operatorApprovals;
// =============================================================// CONSTRUCTOR// =============================================================constructor(stringmemory name_, stringmemory symbol_) {
_name = name_;
_symbol = symbol_;
_currentIndex = _startTokenId();
}
// =============================================================// TOKEN COUNTING OPERATIONS// =============================================================/**
* @dev Returns the starting token ID.
* To change the starting token ID, please override this function.
*/function_startTokenId() internalviewvirtualreturns (uint256) {
return0;
}
/**
* @dev Returns the next token ID to be minted.
*/function_nextTokenId() internalviewvirtualreturns (uint256) {
return _currentIndex;
}
/**
* @dev Returns the total number of tokens in existence.
* Burned tokens will reduce the count.
* To get the total number of tokens minted, please see {_totalMinted}.
*/functiontotalSupply() publicviewvirtualoverridereturns (uint256) {
// Counter underflow is impossible as _burnCounter cannot be incremented// more than `_currentIndex - _startTokenId()` times.unchecked {
return _currentIndex - _burnCounter - _startTokenId();
}
}
/**
* @dev Returns the total amount of tokens minted in the contract.
*/function_totalMinted() internalviewvirtualreturns (uint256) {
// Counter underflow is impossible as `_currentIndex` does not decrement,// and it is initialized to `_startTokenId()`.unchecked {
return _currentIndex - _startTokenId();
}
}
/**
* @dev Returns the total number of tokens burned.
*/function_totalBurned() internalviewvirtualreturns (uint256) {
return _burnCounter;
}
// =============================================================// ADDRESS DATA OPERATIONS// =============================================================/**
* @dev Returns the number of tokens in `owner`'s account.
*/functionbalanceOf(address owner) publicviewvirtualoverridereturns (uint256) {
if (owner ==address(0)) revert BalanceQueryForZeroAddress();
return _packedAddressData[owner] & _BITMASK_ADDRESS_DATA_ENTRY;
}
/**
* Returns the number of tokens minted by `owner`.
*/function_numberMinted(address owner) internalviewreturns (uint256) {
return (_packedAddressData[owner] >> _BITPOS_NUMBER_MINTED) & _BITMASK_ADDRESS_DATA_ENTRY;
}
/**
* Returns the number of tokens burned by or on behalf of `owner`.
*/function_numberBurned(address owner) internalviewreturns (uint256) {
return (_packedAddressData[owner] >> _BITPOS_NUMBER_BURNED) & _BITMASK_ADDRESS_DATA_ENTRY;
}
/**
* Returns the auxiliary data for `owner`. (e.g. number of whitelist mint slots used).
*/function_getAux(address owner) internalviewreturns (uint64) {
returnuint64(_packedAddressData[owner] >> _BITPOS_AUX);
}
/**
* Sets the auxiliary 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) internalvirtual{
uint256 packed = _packedAddressData[owner];
uint256 auxCasted;
// Cast `aux` with assembly to avoid redundant masking.assembly {
auxCasted := aux
}
packed = (packed & _BITMASK_AUX_COMPLEMENT) | (auxCasted << _BITPOS_AUX);
_packedAddressData[owner] = packed;
}
// =============================================================// IERC165// =============================================================/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* [EIP section](https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified)
* to learn more about how these ids are created.
*
* This function call must use less than 30000 gas.
*/functionsupportsInterface(bytes4 interfaceId) publicviewvirtualoverridereturns (bool) {
// The interface IDs are constants representing the first 4 bytes// of the XOR of all function selectors in the interface.// See: [ERC165](https://eips.ethereum.org/EIPS/eip-165)// (e.g. `bytes4(i.functionA.selector ^ i.functionB.selector ^ ...)`)return
interfaceId ==0x01ffc9a7||// ERC165 interface ID for ERC165.
interfaceId ==0x80ac58cd||// ERC165 interface ID for ERC721.
interfaceId ==0x5b5e139f; // ERC165 interface ID for ERC721Metadata.
}
// =============================================================// IERC721Metadata// =============================================================/**
* @dev Returns the token collection name.
*/functionname() publicviewvirtualoverridereturns (stringmemory) {
return _name;
}
/**
* @dev Returns the token collection symbol.
*/functionsymbol() publicviewvirtualoverridereturns (stringmemory) {
return _symbol;
}
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/functiontokenURI(uint256 tokenId) publicviewvirtualoverridereturns (stringmemory) {
if (!_exists(tokenId)) revert URIQueryForNonexistentToken();
stringmemory baseURI = _baseURI();
returnbytes(baseURI).length!=0 ? string(abi.encodePacked(baseURI, _toString(tokenId))) : '';
}
/**
* @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, it can be overridden in child contracts.
*/function_baseURI() internalviewvirtualreturns (stringmemory) {
return'';
}
// =============================================================// OWNERSHIPS OPERATIONS// =============================================================/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/functionownerOf(uint256 tokenId) publicviewvirtualoverridereturns (address) {
returnaddress(uint160(_packedOwnershipOf(tokenId)));
}
/**
* @dev Gas spent here starts off proportional to the maximum mint batch size.
* It gradually moves to O(1) as tokens get transferred around over time.
*/function_ownershipOf(uint256 tokenId) internalviewvirtualreturns (TokenOwnership memory) {
return _unpackedOwnership(_packedOwnershipOf(tokenId));
}
/**
* @dev Returns the unpacked `TokenOwnership` struct at `index`.
*/function_ownershipAt(uint256 index) internalviewvirtualreturns (TokenOwnership memory) {
return _unpackedOwnership(_packedOwnerships[index]);
}
/**
* @dev Initializes the ownership slot minted at `index` for efficiency purposes.
*/function_initializeOwnershipAt(uint256 index) internalvirtual{
if (_packedOwnerships[index] ==0) {
_packedOwnerships[index] = _packedOwnershipOf(index);
}
}
/**
* Returns the packed ownership data of `tokenId`.
*/function_packedOwnershipOf(uint256 tokenId) privateviewreturns (uint256) {
uint256 curr = tokenId;
unchecked {
if (_startTokenId() <= curr)
if (curr < _currentIndex) {
uint256 packed = _packedOwnerships[curr];
// If not burned.if (packed & _BITMASK_BURNED ==0) {
// Invariant:// There will always be an initialized ownership slot// (i.e. `ownership.addr != address(0) && ownership.burned == false`)// before an unintialized ownership slot// (i.e. `ownership.addr == address(0) && ownership.burned == false`)// Hence, `curr` will not underflow.//// We can directly compare the packed value.// If the address is zero, packed will be zero.while (packed ==0) {
packed = _packedOwnerships[--curr];
}
return packed;
}
}
}
revert OwnerQueryForNonexistentToken();
}
/**
* @dev Returns the unpacked `TokenOwnership` struct from `packed`.
*/function_unpackedOwnership(uint256 packed) privatepurereturns (TokenOwnership memory ownership) {
ownership.addr =address(uint160(packed));
ownership.startTimestamp =uint64(packed >> _BITPOS_START_TIMESTAMP);
ownership.burned = packed & _BITMASK_BURNED !=0;
ownership.extraData =uint24(packed >> _BITPOS_EXTRA_DATA);
}
/**
* @dev Packs ownership data into a single uint256.
*/function_packOwnershipData(address owner, uint256 flags) privateviewreturns (uint256 result) {
assembly {
// Mask `owner` to the lower 160 bits, in case the upper bits somehow aren't clean.
owner :=and(owner, _BITMASK_ADDRESS)
// `owner | (block.timestamp << _BITPOS_START_TIMESTAMP) | flags`.
result :=or(owner, or(shl(_BITPOS_START_TIMESTAMP, timestamp()), flags))
}
}
/**
* @dev Returns the `nextInitialized` flag set if `quantity` equals 1.
*/function_nextInitializedFlag(uint256 quantity) privatepurereturns (uint256 result) {
// For branchless setting of the `nextInitialized` flag.assembly {
// `(quantity == 1) << _BITPOS_NEXT_INITIALIZED`.
result :=shl(_BITPOS_NEXT_INITIALIZED, eq(quantity, 1))
}
}
// =============================================================// APPROVAL OPERATIONS// =============================================================/**
* @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.
*/functionapprove(address to, uint256 tokenId) publicpayablevirtualoverride{
address owner = ownerOf(tokenId);
if (_msgSenderERC721A() != owner)
if (!isApprovedForAll(owner, _msgSenderERC721A())) {
revert ApprovalCallerNotOwnerNorApproved();
}
_tokenApprovals[tokenId].value= to;
emit Approval(owner, to, tokenId);
}
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/functiongetApproved(uint256 tokenId) publicviewvirtualoverridereturns (address) {
if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken();
return _tokenApprovals[tokenId].value;
}
/**
* @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.
*/functionsetApprovalForAll(address operator, bool approved) publicvirtualoverride{
_operatorApprovals[_msgSenderERC721A()][operator] = approved;
emit ApprovalForAll(_msgSenderERC721A(), operator, approved);
}
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}.
*/functionisApprovedForAll(address owner, address operator) publicviewvirtualoverridereturns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @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. See {_mint}.
*/function_exists(uint256 tokenId) internalviewvirtualreturns (bool) {
return
_startTokenId() <= tokenId &&
tokenId < _currentIndex &&// If within bounds,
_packedOwnerships[tokenId] & _BITMASK_BURNED ==0; // and not burned.
}
/**
* @dev Returns whether `msgSender` is equal to `approvedAddress` or `owner`.
*/function_isSenderApprovedOrOwner(address approvedAddress,
address owner,
address msgSender
) privatepurereturns (bool result) {
assembly {
// Mask `owner` to the lower 160 bits, in case the upper bits somehow aren't clean.
owner :=and(owner, _BITMASK_ADDRESS)
// Mask `msgSender` to the lower 160 bits, in case the upper bits somehow aren't clean.
msgSender :=and(msgSender, _BITMASK_ADDRESS)
// `msgSender == owner || msgSender == approvedAddress`.
result :=or(eq(msgSender, owner), eq(msgSender, approvedAddress))
}
}
/**
* @dev Returns the storage slot and value for the approved address of `tokenId`.
*/function_getApprovedSlotAndAddress(uint256 tokenId)
privateviewreturns (uint256 approvedAddressSlot, address approvedAddress)
{
TokenApprovalRef storage tokenApproval = _tokenApprovals[tokenId];
// The following is equivalent to `approvedAddress = _tokenApprovals[tokenId].value`.assembly {
approvedAddressSlot := tokenApproval.slot
approvedAddress :=sload(approvedAddressSlot)
}
}
// =============================================================// TRANSFER OPERATIONS// =============================================================/**
* @dev Transfers `tokenId` from `from` to `to`.
*
* 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.
*/functiontransferFrom(addressfrom,
address to,
uint256 tokenId
) publicpayablevirtualoverride{
uint256 prevOwnershipPacked = _packedOwnershipOf(tokenId);
if (address(uint160(prevOwnershipPacked)) !=from) revert TransferFromIncorrectOwner();
(uint256 approvedAddressSlot, address approvedAddress) = _getApprovedSlotAndAddress(tokenId);
// The nested ifs save around 20+ gas over a compound boolean condition.if (!_isSenderApprovedOrOwner(approvedAddress, from, _msgSenderERC721A()))
if (!isApprovedForAll(from, _msgSenderERC721A())) revert TransferCallerNotOwnerNorApproved();
if (to ==address(0)) revert TransferToZeroAddress();
_beforeTokenTransfers(from, to, tokenId, 1);
// Clear approvals from the previous owner.assembly {
if approvedAddress {
// This is equivalent to `delete _tokenApprovals[tokenId]`.sstore(approvedAddressSlot, 0)
}
}
// 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 {
// We can directly increment and decrement the balances.--_packedAddressData[from]; // Updates: `balance -= 1`.++_packedAddressData[to]; // Updates: `balance += 1`.// Updates:// - `address` to the next owner.// - `startTimestamp` to the timestamp of transfering.// - `burned` to `false`.// - `nextInitialized` to `true`.
_packedOwnerships[tokenId] = _packOwnershipData(
to,
_BITMASK_NEXT_INITIALIZED | _nextExtraData(from, to, prevOwnershipPacked)
);
// If the next slot may not have been initialized (i.e. `nextInitialized == false`) .if (prevOwnershipPacked & _BITMASK_NEXT_INITIALIZED ==0) {
uint256 nextTokenId = tokenId +1;
// If the next slot's address is zero and not burned (i.e. packed value is zero).if (_packedOwnerships[nextTokenId] ==0) {
// If the next slot is within bounds.if (nextTokenId != _currentIndex) {
// Initialize the next slot to maintain correctness for `ownerOf(tokenId + 1)`.
_packedOwnerships[nextTokenId] = prevOwnershipPacked;
}
}
}
}
emit Transfer(from, to, tokenId);
_afterTokenTransfers(from, to, tokenId, 1);
}
/**
* @dev Equivalent to `safeTransferFrom(from, to, tokenId, '')`.
*/functionsafeTransferFrom(addressfrom,
address to,
uint256 tokenId
) publicpayablevirtualoverride{
safeTransferFrom(from, to, tokenId, '');
}
/**
* @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.
*/functionsafeTransferFrom(addressfrom,
address to,
uint256 tokenId,
bytesmemory _data
) publicpayablevirtualoverride{
transferFrom(from, to, tokenId);
if (to.code.length!=0)
if (!_checkContractOnERC721Received(from, to, tokenId, _data)) {
revert TransferToNonERC721ReceiverImplementer();
}
}
/**
* @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(addressfrom,
address to,
uint256 startTokenId,
uint256 quantity
) internalvirtual{}
/**
* @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(addressfrom,
address to,
uint256 startTokenId,
uint256 quantity
) internalvirtual{}
/**
* @dev Private function to invoke {IERC721Receiver-onERC721Received} on a target contract.
*
* `from` - Previous owner of the given token ID.
* `to` - Target address that will receive the token.
* `tokenId` - Token ID to be transferred.
* `_data` - Optional data to send along with the call.
*
* Returns whether the call correctly returned the expected magic value.
*/function_checkContractOnERC721Received(addressfrom,
address to,
uint256 tokenId,
bytesmemory _data
) privatereturns (bool) {
try ERC721A__IERC721Receiver(to).onERC721Received(_msgSenderERC721A(), from, tokenId, _data) returns (
bytes4 retval
) {
return retval == ERC721A__IERC721Receiver(to).onERC721Received.selector;
} catch (bytesmemory reason) {
if (reason.length==0) {
revert TransferToNonERC721ReceiverImplementer();
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
}
// =============================================================// MINT OPERATIONS// =============================================================/**
* @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 for each mint.
*/function_mint(address to, uint256 quantity) internalvirtual{
uint256 startTokenId = _currentIndex;
if (quantity ==0) revert MintZeroQuantity();
_beforeTokenTransfers(address(0), to, startTokenId, quantity);
// Overflows are incredibly unrealistic.// `balance` and `numberMinted` have a maximum limit of 2**64.// `tokenId` has a maximum limit of 2**256.unchecked {
// Updates:// - `balance += quantity`.// - `numberMinted += quantity`.//// We can directly add to the `balance` and `numberMinted`.
_packedAddressData[to] += quantity * ((1<< _BITPOS_NUMBER_MINTED) |1);
// Updates:// - `address` to the owner.// - `startTimestamp` to the timestamp of minting.// - `burned` to `false`.// - `nextInitialized` to `quantity == 1`.
_packedOwnerships[startTokenId] = _packOwnershipData(
to,
_nextInitializedFlag(quantity) | _nextExtraData(address(0), to, 0)
);
uint256 toMasked;
uint256 end = startTokenId + quantity;
// Use assembly to loop and emit the `Transfer` event for gas savings.// The duplicated `log4` removes an extra check and reduces stack juggling.// The assembly, together with the surrounding Solidity code, have been// delicately arranged to nudge the compiler into producing optimized opcodes.assembly {
// Mask `to` to the lower 160 bits, in case the upper bits somehow aren't clean.
toMasked :=and(to, _BITMASK_ADDRESS)
// Emit the `Transfer` event.log4(
0, // Start of data (0, since no data).0, // End of data (0, since no data).
_TRANSFER_EVENT_SIGNATURE, // Signature.0, // `address(0)`.
toMasked, // `to`.
startTokenId // `tokenId`.
)
// The `iszero(eq(,))` check ensures that large values of `quantity`// that overflows uint256 will make the loop run out of gas.// The compiler will optimize the `iszero` away for performance.for {
let tokenId :=add(startTokenId, 1)
} iszero(eq(tokenId, end)) {
tokenId :=add(tokenId, 1)
} {
// Emit the `Transfer` event. Similar to above.log4(0, 0, _TRANSFER_EVENT_SIGNATURE, 0, toMasked, tokenId)
}
}
if (toMasked ==0) revert MintToZeroAddress();
_currentIndex = end;
}
_afterTokenTransfers(address(0), to, startTokenId, quantity);
}
/**
* @dev Mints `quantity` tokens and transfers them to `to`.
*
* This function is intended for efficient minting only during contract creation.
*
* It emits only one {ConsecutiveTransfer} as defined in
* [ERC2309](https://eips.ethereum.org/EIPS/eip-2309),
* instead of a sequence of {Transfer} event(s).
*
* Calling this function outside of contract creation WILL make your contract
* non-compliant with the ERC721 standard.
* For full ERC721 compliance, substituting ERC721 {Transfer} event(s) with the ERC2309
* {ConsecutiveTransfer} event is only permissible during contract creation.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `quantity` must be greater than 0.
*
* Emits a {ConsecutiveTransfer} event.
*/function_mintERC2309(address to, uint256 quantity) internalvirtual{
uint256 startTokenId = _currentIndex;
if (to ==address(0)) revert MintToZeroAddress();
if (quantity ==0) revert MintZeroQuantity();
if (quantity > _MAX_MINT_ERC2309_QUANTITY_LIMIT) revert MintERC2309QuantityExceedsLimit();
_beforeTokenTransfers(address(0), to, startTokenId, quantity);
// Overflows are unrealistic due to the above check for `quantity` to be below the limit.unchecked {
// Updates:// - `balance += quantity`.// - `numberMinted += quantity`.//// We can directly add to the `balance` and `numberMinted`.
_packedAddressData[to] += quantity * ((1<< _BITPOS_NUMBER_MINTED) |1);
// Updates:// - `address` to the owner.// - `startTimestamp` to the timestamp of minting.// - `burned` to `false`.// - `nextInitialized` to `quantity == 1`.
_packedOwnerships[startTokenId] = _packOwnershipData(
to,
_nextInitializedFlag(quantity) | _nextExtraData(address(0), to, 0)
);
emit ConsecutiveTransfer(startTokenId, startTokenId + quantity -1, address(0), to);
_currentIndex = startTokenId + quantity;
}
_afterTokenTransfers(address(0), to, startTokenId, 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.
*
* See {_mint}.
*
* Emits a {Transfer} event for each mint.
*/function_safeMint(address to,
uint256 quantity,
bytesmemory _data
) internalvirtual{
_mint(to, quantity);
unchecked {
if (to.code.length!=0) {
uint256 end = _currentIndex;
uint256 index = end - quantity;
do {
if (!_checkContractOnERC721Received(address(0), to, index++, _data)) {
revert TransferToNonERC721ReceiverImplementer();
}
} while (index < end);
// Reentrancy protection.if (_currentIndex != end) revert();
}
}
}
/**
* @dev Equivalent to `_safeMint(to, quantity, '')`.
*/function_safeMint(address to, uint256 quantity) internalvirtual{
_safeMint(to, quantity, '');
}
// =============================================================// BURN OPERATIONS// =============================================================/**
* @dev Equivalent to `_burn(tokenId, false)`.
*/function_burn(uint256 tokenId) internalvirtual{
_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) internalvirtual{
uint256 prevOwnershipPacked = _packedOwnershipOf(tokenId);
addressfrom=address(uint160(prevOwnershipPacked));
(uint256 approvedAddressSlot, address approvedAddress) = _getApprovedSlotAndAddress(tokenId);
if (approvalCheck) {
// The nested ifs save around 20+ gas over a compound boolean condition.if (!_isSenderApprovedOrOwner(approvedAddress, from, _msgSenderERC721A()))
if (!isApprovedForAll(from, _msgSenderERC721A())) revert TransferCallerNotOwnerNorApproved();
}
_beforeTokenTransfers(from, address(0), tokenId, 1);
// Clear approvals from the previous owner.assembly {
if approvedAddress {
// This is equivalent to `delete _tokenApprovals[tokenId]`.sstore(approvedAddressSlot, 0)
}
}
// 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 {
// Updates:// - `balance -= 1`.// - `numberBurned += 1`.//// We can directly decrement the balance, and increment the number burned.// This is equivalent to `packed -= 1; packed += 1 << _BITPOS_NUMBER_BURNED;`.
_packedAddressData[from] += (1<< _BITPOS_NUMBER_BURNED) -1;
// Updates:// - `address` to the last owner.// - `startTimestamp` to the timestamp of burning.// - `burned` to `true`.// - `nextInitialized` to `true`.
_packedOwnerships[tokenId] = _packOwnershipData(
from,
(_BITMASK_BURNED | _BITMASK_NEXT_INITIALIZED) | _nextExtraData(from, address(0), prevOwnershipPacked)
);
// If the next slot may not have been initialized (i.e. `nextInitialized == false`) .if (prevOwnershipPacked & _BITMASK_NEXT_INITIALIZED ==0) {
uint256 nextTokenId = tokenId +1;
// If the next slot's address is zero and not burned (i.e. packed value is zero).if (_packedOwnerships[nextTokenId] ==0) {
// If the next slot is within bounds.if (nextTokenId != _currentIndex) {
// Initialize the next slot to maintain correctness for `ownerOf(tokenId + 1)`.
_packedOwnerships[nextTokenId] = prevOwnershipPacked;
}
}
}
}
emit Transfer(from, address(0), tokenId);
_afterTokenTransfers(from, address(0), tokenId, 1);
// Overflow not possible, as _burnCounter cannot be exceed _currentIndex times.unchecked {
_burnCounter++;
}
}
// =============================================================// EXTRA DATA OPERATIONS// =============================================================/**
* @dev Directly sets the extra data for the ownership data `index`.
*/function_setExtraDataAt(uint256 index, uint24 extraData) internalvirtual{
uint256 packed = _packedOwnerships[index];
if (packed ==0) revert OwnershipNotInitializedForExtraData();
uint256 extraDataCasted;
// Cast `extraData` with assembly to avoid redundant masking.assembly {
extraDataCasted := extraData
}
packed = (packed & _BITMASK_EXTRA_DATA_COMPLEMENT) | (extraDataCasted << _BITPOS_EXTRA_DATA);
_packedOwnerships[index] = packed;
}
/**
* @dev Called during each token transfer to set the 24bit `extraData` field.
* Intended to be overridden by the cosumer contract.
*
* `previousExtraData` - the value of `extraData` before transfer.
*
* 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_extraData(addressfrom,
address to,
uint24 previousExtraData
) internalviewvirtualreturns (uint24) {}
/**
* @dev Returns the next extra data for the packed ownership data.
* The returned result is shifted into position.
*/function_nextExtraData(addressfrom,
address to,
uint256 prevOwnershipPacked
) privateviewreturns (uint256) {
uint24 extraData =uint24(prevOwnershipPacked >> _BITPOS_EXTRA_DATA);
returnuint256(_extraData(from, to, extraData)) << _BITPOS_EXTRA_DATA;
}
// =============================================================// OTHER OPERATIONS// =============================================================/**
* @dev Returns the message sender (defaults to `msg.sender`).
*
* If you are writing GSN compatible contracts, you need to override this function.
*/function_msgSenderERC721A() internalviewvirtualreturns (address) {
returnmsg.sender;
}
/**
* @dev Converts a uint256 to its ASCII string decimal representation.
*/function_toString(uint256 value) internalpurevirtualreturns (stringmemory str) {
assembly {
// The maximum value of a uint256 contains 78 digits (1 byte per digit), but// we allocate 0xa0 bytes to keep the free memory pointer 32-byte word aligned.// We will need 1 word for the trailing zeros padding, 1 word for the length,// and 3 words for a maximum of 78 digits. Total: 5 * 0x20 = 0xa0.let m :=add(mload(0x40), 0xa0)
// Update the free memory pointer to allocate.mstore(0x40, m)
// Assign the `str` to the end.
str :=sub(m, 0x20)
// Zeroize the slot after the string.mstore(str, 0)
// Cache the end of the memory to calculate the length later.let end := str
// We write the string from rightmost digit to leftmost digit.// The following is essentially a do-while loop that also handles the zero case.// prettier-ignorefor { let temp := value } 1 {} {
str :=sub(str, 1)
// Write the character to the pointer.// The ASCII index of the '0' character is 48.mstore8(str, add(48, mod(temp, 10)))
// Keep dividing `temp` until zero.
temp :=div(temp, 10)
// prettier-ignoreifiszero(temp) { break }
}
let length :=sub(end, str)
// Move the pointer 32 bytes leftwards to make room for the length.
str :=sub(str, 0x20)
// Store the length.mstore(str, length)
}
}
}
Contract Source Code
File 5 of 10: IDelegationRegistry.sol
// SPDX-License-Identifier: CC0-1.0pragmasolidity ^0.8.17;/**
* @title An immutable registry contract to be deployed as a standalone primitive
* @dev See EIP-5639, new project launches can read previous cold wallet -> hot wallet delegations
* from here and integrate those permissions into their flow
*/interfaceIDelegationRegistry{
/// @notice Delegation typeenumDelegationType {
NONE,
ALL,
CONTRACT,
TOKEN
}
/// @notice Info about a single delegation, used for onchain enumerationstructDelegationInfo {
DelegationType type_;
address vault;
address delegate;
address contract_;
uint256 tokenId;
}
/// @notice Info about a single contract-level delegationstructContractDelegation {
address contract_;
address delegate;
}
/// @notice Info about a single token-level delegationstructTokenDelegation {
address contract_;
uint256 tokenId;
address delegate;
}
/// @notice Emitted when a user delegates their entire walleteventDelegateForAll(address vault, address delegate, bool value);
/// @notice Emitted when a user delegates a specific contracteventDelegateForContract(address vault, address delegate, address contract_, bool value);
/// @notice Emitted when a user delegates a specific tokeneventDelegateForToken(address vault, address delegate, address contract_, uint256 tokenId, bool value);
/// @notice Emitted when a user revokes all delegationseventRevokeAllDelegates(address vault);
/// @notice Emitted when a user revoes all delegations for a given delegateeventRevokeDelegate(address vault, address delegate);
/**
* ----------- WRITE -----------
*//**
* @notice Allow the delegate to act on your behalf for all contracts
* @param delegate The hotwallet to act on your behalf
* @param value Whether to enable or disable delegation for this address, true for setting and false for revoking
*/functiondelegateForAll(address delegate, bool value) external;
/**
* @notice Allow the delegate to act on your behalf for a specific contract
* @param delegate The hotwallet to act on your behalf
* @param contract_ The address for the contract you're delegating
* @param value Whether to enable or disable delegation for this address, true for setting and false for revoking
*/functiondelegateForContract(address delegate, address contract_, bool value) external;
/**
* @notice Allow the delegate to act on your behalf for a specific token
* @param delegate The hotwallet to act on your behalf
* @param contract_ The address for the contract you're delegating
* @param tokenId The token id for the token you're delegating
* @param value Whether to enable or disable delegation for this address, true for setting and false for revoking
*/functiondelegateForToken(address delegate, address contract_, uint256 tokenId, bool value) external;
/**
* @notice Revoke all delegates
*/functionrevokeAllDelegates() external;
/**
* @notice Revoke a specific delegate for all their permissions
* @param delegate The hotwallet to revoke
*/functionrevokeDelegate(address delegate) external;
/**
* @notice Remove yourself as a delegate for a specific vault
* @param vault The vault which delegated to the msg.sender, and should be removed
*/functionrevokeSelf(address vault) external;
/**
* ----------- READ -----------
*//**
* @notice Returns all active delegations a given delegate is able to claim on behalf of
* @param delegate The delegate that you would like to retrieve delegations for
* @return info Array of DelegationInfo structs
*/functiongetDelegationsByDelegate(address delegate) externalviewreturns (DelegationInfo[] memory);
/**
* @notice Returns an array of wallet-level delegates for a given vault
* @param vault The cold wallet who issued the delegation
* @return addresses Array of wallet-level delegates for a given vault
*/functiongetDelegatesForAll(address vault) externalviewreturns (address[] memory);
/**
* @notice Returns an array of contract-level delegates for a given vault and contract
* @param vault The cold wallet who issued the delegation
* @param contract_ The address for the contract you're delegating
* @return addresses Array of contract-level delegates for a given vault and contract
*/functiongetDelegatesForContract(address vault, address contract_) externalviewreturns (address[] memory);
/**
* @notice Returns an array of contract-level delegates for a given vault's token
* @param vault The cold wallet who issued the delegation
* @param contract_ The address for the contract holding the token
* @param tokenId The token id for the token you're delegating
* @return addresses Array of contract-level delegates for a given vault's token
*/functiongetDelegatesForToken(address vault, address contract_, uint256 tokenId)
externalviewreturns (address[] memory);
/**
* @notice Returns all contract-level delegations for a given vault
* @param vault The cold wallet who issued the delegations
* @return delegations Array of ContractDelegation structs
*/functiongetContractLevelDelegations(address vault)
externalviewreturns (ContractDelegation[] memory delegations);
/**
* @notice Returns all token-level delegations for a given vault
* @param vault The cold wallet who issued the delegations
* @return delegations Array of TokenDelegation structs
*/functiongetTokenLevelDelegations(address vault) externalviewreturns (TokenDelegation[] memory delegations);
/**
* @notice Returns true if the address is delegated to act on the entire vault
* @param delegate The hotwallet to act on your behalf
* @param vault The cold wallet who issued the delegation
*/functioncheckDelegateForAll(address delegate, address vault) externalviewreturns (bool);
/**
* @notice Returns true if the address is delegated to act on your behalf for a token contract or an entire vault
* @param delegate The hotwallet to act on your behalf
* @param contract_ The address for the contract you're delegating
* @param vault The cold wallet who issued the delegation
*/functioncheckDelegateForContract(address delegate, address vault, address contract_)
externalviewreturns (bool);
/**
* @notice Returns true if the address is delegated to act on your behalf for a specific token, the token's contract or an entire vault
* @param delegate The hotwallet to act on your behalf
* @param contract_ The address for the contract you're delegating
* @param tokenId The token id for the token you're delegating
* @param vault The cold wallet who issued the delegation
*/functioncheckDelegateForToken(address delegate, address vault, address contract_, uint256 tokenId)
externalviewreturns (bool);
}
Contract Source Code
File 6 of 10: IERC165.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)pragmasolidity ^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}.
*/interfaceIERC165{
/**
* @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.
*/functionsupportsInterface(bytes4 interfaceId) externalviewreturns (bool);
}
Contract Source Code
File 7 of 10: IERC721.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC721/IERC721.sol)pragmasolidity ^0.8.0;import"../../utils/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/interfaceIERC721isIERC165{
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/eventTransfer(addressindexedfrom, addressindexed to, uint256indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/eventApproval(addressindexed owner, addressindexed approved, uint256indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/eventApprovalForAll(addressindexed owner, addressindexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/functionbalanceOf(address owner) externalviewreturns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/functionownerOf(uint256 tokenId) externalviewreturns (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.
*/functionsafeTransferFrom(addressfrom,
address to,
uint256 tokenId,
bytescalldata 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.
*/functionsafeTransferFrom(addressfrom,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* 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.
*/functiontransferFrom(addressfrom,
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.
*/functionapprove(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.
*/functionsetApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/functiongetApproved(uint256 tokenId) externalviewreturns (address operator);
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/functionisApprovedForAll(address owner, address operator) externalviewreturns (bool);
}
Contract Source Code
File 8 of 10: IERC721A.sol
// SPDX-License-Identifier: MIT// ERC721A Contracts v4.2.3// Creator: Chiru Labspragmasolidity ^0.8.4;/**
* @dev Interface of ERC721A.
*/interfaceIERC721A{
/**
* The caller must own the token or be an approved operator.
*/errorApprovalCallerNotOwnerNorApproved();
/**
* The token does not exist.
*/errorApprovalQueryForNonexistentToken();
/**
* Cannot query the balance for the zero address.
*/errorBalanceQueryForZeroAddress();
/**
* Cannot mint to the zero address.
*/errorMintToZeroAddress();
/**
* The quantity of tokens minted must be more than zero.
*/errorMintZeroQuantity();
/**
* The token does not exist.
*/errorOwnerQueryForNonexistentToken();
/**
* The caller must own the token or be an approved operator.
*/errorTransferCallerNotOwnerNorApproved();
/**
* The token must be owned by `from`.
*/errorTransferFromIncorrectOwner();
/**
* Cannot safely transfer to a contract that does not implement the
* ERC721Receiver interface.
*/errorTransferToNonERC721ReceiverImplementer();
/**
* Cannot transfer to the zero address.
*/errorTransferToZeroAddress();
/**
* The token does not exist.
*/errorURIQueryForNonexistentToken();
/**
* The `quantity` minted with ERC2309 exceeds the safety limit.
*/errorMintERC2309QuantityExceedsLimit();
/**
* The `extraData` cannot be set on an unintialized ownership slot.
*/errorOwnershipNotInitializedForExtraData();
// =============================================================// STRUCTS// =============================================================structTokenOwnership {
// The address of the owner.address addr;
// Stores the start time of ownership with minimal overhead for tokenomics.uint64 startTimestamp;
// Whether the token has been burned.bool burned;
// Arbitrary data similar to `startTimestamp` that can be set via {_extraData}.uint24 extraData;
}
// =============================================================// TOKEN COUNTERS// =============================================================/**
* @dev Returns the total number of tokens in existence.
* Burned tokens will reduce the count.
* To get the total number of tokens minted, please see {_totalMinted}.
*/functiontotalSupply() externalviewreturns (uint256);
// =============================================================// IERC165// =============================================================/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* [EIP section](https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified)
* to learn more about how these ids are created.
*
* This function call must use less than 30000 gas.
*/functionsupportsInterface(bytes4 interfaceId) externalviewreturns (bool);
// =============================================================// IERC721// =============================================================/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/eventTransfer(addressindexedfrom, addressindexed to, uint256indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/eventApproval(addressindexed owner, addressindexed approved, uint256indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables
* (`approved`) `operator` to manage all of its assets.
*/eventApprovalForAll(addressindexed owner, addressindexed operator, bool approved);
/**
* @dev Returns the number of tokens in `owner`'s account.
*/functionbalanceOf(address owner) externalviewreturns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/functionownerOf(uint256 tokenId) externalviewreturns (address owner);
/**
* @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 be 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.
*/functionsafeTransferFrom(addressfrom,
address to,
uint256 tokenId,
bytescalldata data
) externalpayable;
/**
* @dev Equivalent to `safeTransferFrom(from, to, tokenId, '')`.
*/functionsafeTransferFrom(addressfrom,
address to,
uint256 tokenId
) externalpayable;
/**
* @dev Transfers `tokenId` from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom}
* whenever possible.
*
* 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.
*/functiontransferFrom(addressfrom,
address to,
uint256 tokenId
) externalpayable;
/**
* @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.
*/functionapprove(address to, uint256 tokenId) externalpayable;
/**
* @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.
*/functionsetApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/functiongetApproved(uint256 tokenId) externalviewreturns (address operator);
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}.
*/functionisApprovedForAll(address owner, address operator) externalviewreturns (bool);
// =============================================================// IERC721Metadata// =============================================================/**
* @dev Returns the token collection name.
*/functionname() externalviewreturns (stringmemory);
/**
* @dev Returns the token collection symbol.
*/functionsymbol() externalviewreturns (stringmemory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/functiontokenURI(uint256 tokenId) externalviewreturns (stringmemory);
// =============================================================// IERC2309// =============================================================/**
* @dev Emitted when tokens in `fromTokenId` to `toTokenId`
* (inclusive) is transferred from `from` to `to`, as defined in the
* [ERC2309](https://eips.ethereum.org/EIPS/eip-2309) standard.
*
* See {_mintERC2309} for more details.
*/eventConsecutiveTransfer(uint256indexed fromTokenId, uint256 toTokenId, addressindexedfrom, addressindexed to);
}
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)pragmasolidity ^0.8.0;import"../utils/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.
*/abstractcontractOwnableisContext{
addressprivate _owner;
eventOwnershipTransferred(addressindexed previousOwner, addressindexed 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.
*/modifieronlyOwner() {
_checkOwner();
_;
}
/**
* @dev Returns the address of the current owner.
*/functionowner() publicviewvirtualreturns (address) {
return _owner;
}
/**
* @dev Throws if the sender is not the owner.
*/function_checkOwner() internalviewvirtual{
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.
*/functionrenounceOwnership() publicvirtualonlyOwner{
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/functiontransferOwnership(address newOwner) publicvirtualonlyOwner{
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) internalvirtual{
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}