// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)pragmasolidity ^0.8.1;/**
* @dev Collection of functions related to the address type
*/libraryAddress{
/**
* @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.
* ====
*/functionisContract(address account) internalviewreturns (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].
*/functionsendValue(addresspayable 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._
*/functionfunctionCall(address target, bytesmemory data) internalreturns (bytesmemory) {
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._
*/functionfunctionCall(address target,
bytesmemory data,
stringmemory errorMessage
) internalreturns (bytesmemory) {
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._
*/functionfunctionCallWithValue(address target,
bytesmemory data,
uint256 value
) internalreturns (bytesmemory) {
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._
*/functionfunctionCallWithValue(address target,
bytesmemory data,
uint256 value,
stringmemory errorMessage
) internalreturns (bytesmemory) {
require(address(this).balance>= value, "Address: insufficient balance for call");
(bool success, bytesmemory 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._
*/functionfunctionStaticCall(address target, bytesmemory data) internalviewreturns (bytesmemory) {
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._
*/functionfunctionStaticCall(address target,
bytesmemory data,
stringmemory errorMessage
) internalviewreturns (bytesmemory) {
(bool success, bytesmemory 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._
*/functionfunctionDelegateCall(address target, bytesmemory data) internalreturns (bytesmemory) {
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._
*/functionfunctionDelegateCall(address target,
bytesmemory data,
stringmemory errorMessage
) internalreturns (bytesmemory) {
(bool success, bytesmemory 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._
*/functionverifyCallResultFromTarget(address target,
bool success,
bytesmemory returndata,
stringmemory errorMessage
) internalviewreturns (bytesmemory) {
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 contractrequire(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._
*/functionverifyCallResult(bool success,
bytesmemory returndata,
stringmemory errorMessage
) internalpurereturns (bytesmemory) {
if (success) {
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
function_revert(bytesmemory returndata, stringmemory errorMessage) privatepure{
// Look for revert reason and bubble it up if presentif (returndata.length>0) {
// The easiest way to bubble the revert reason is using memory via assembly/// @solidity memory-safe-assemblyassembly {
let returndata_size :=mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.7.0) (utils/Base64.sol)pragmasolidity ^0.8.0;/**
* @dev Provides a set of functions to operate with Base64 strings.
*
* _Available since v4.5._
*/libraryBase64{
/**
* @dev Base64 Encoding/Decoding Table
*/stringinternalconstant _TABLE ="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
/**
* @dev Converts a `bytes` to its Bytes64 `string` representation.
*/functionencode(bytesmemory data) internalpurereturns (stringmemory) {
/**
* Inspired by Brecht Devos (Brechtpd) implementation - MIT licence
* https://github.com/Brechtpd/base64/blob/e78d9fd951e7b0977ddca77d92dc85183770daf4/base64.sol
*/if (data.length==0) return"";
// Loads the table into memorystringmemory table = _TABLE;
// Encoding takes 3 bytes chunks of binary data from `bytes` data parameter// and split into 4 numbers of 6 bits.// The final Base64 length should be `bytes` data length multiplied by 4/3 rounded up// - `data.length + 2` -> Round up// - `/ 3` -> Number of 3-bytes chunks// - `4 *` -> 4 characters for each chunkstringmemory result =newstring(4* ((data.length+2) /3));
/// @solidity memory-safe-assemblyassembly {
// Prepare the lookup table (skip the first "length" byte)let tablePtr :=add(table, 1)
// Prepare result pointer, jump over lengthlet resultPtr :=add(result, 32)
// Run over the input, 3 bytes at a timefor {
let dataPtr := data
let endPtr :=add(data, mload(data))
} lt(dataPtr, endPtr) {
} {
// Advance 3 bytes
dataPtr :=add(dataPtr, 3)
let input :=mload(dataPtr)
// To write each character, shift the 3 bytes (18 bits) chunk// 4 times in blocks of 6 bits for each character (18, 12, 6, 0)// and apply logical AND with 0x3F which is the number of// the previous character in the ASCII table prior to the Base64 Table// The result is then added to the table to get the character to write,// and finally write it in the result pointer but with a left shift// of 256 (1 byte) - 8 (1 ASCII char) = 248 bitsmstore8(resultPtr, mload(add(tablePtr, and(shr(18, input), 0x3F))))
resultPtr :=add(resultPtr, 1) // Advancemstore8(resultPtr, mload(add(tablePtr, and(shr(12, input), 0x3F))))
resultPtr :=add(resultPtr, 1) // Advancemstore8(resultPtr, mload(add(tablePtr, and(shr(6, input), 0x3F))))
resultPtr :=add(resultPtr, 1) // Advancemstore8(resultPtr, mload(add(tablePtr, and(input, 0x3F))))
resultPtr :=add(resultPtr, 1) // Advance
}
// When data `bytes` is not exactly 3 bytes long// it is padded with `=` characters at the endswitchmod(mload(data), 3)
case1 {
mstore8(sub(resultPtr, 1), 0x3d)
mstore8(sub(resultPtr, 2), 0x3d)
}
case2 {
mstore8(sub(resultPtr, 1), 0x3d)
}
}
return result;
}
}
// 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;
}
}
Contract Source Code
File 8 of 41: DefaultOperatorFilterer.sol
// SPDX-License-Identifier: MITpragmasolidity ^0.8.13;import {OperatorFilterer} from"./OperatorFilterer.sol";
import {CANONICAL_CORI_SUBSCRIPTION} from"./lib/Constants.sol";
/**
* @title DefaultOperatorFilterer
* @notice Inherits from OperatorFilterer and automatically subscribes to the default OpenSea subscription.
* @dev Please note that if your token contract does not provide an owner with EIP-173, it must provide
* administration methods on the contract itself to interact with the registry otherwise the subscription
* will be locked to the options set during construction.
*/abstractcontractDefaultOperatorFiltererisOperatorFilterer{
/// @dev The constructor that is called when the contract is being deployed.constructor() OperatorFilterer(CANONICAL_CORI_SUBSCRIPTION, true) {}
}
Contract Source Code
File 9 of 41: ECDSA.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.8.0) (utils/cryptography/ECDSA.sol)pragmasolidity ^0.8.0;import"../Strings.sol";
/**
* @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
*
* These functions can be used to verify that a message was signed by the holder
* of the private keys of a given address.
*/libraryECDSA{
enumRecoverError {
NoError,
InvalidSignature,
InvalidSignatureLength,
InvalidSignatureS,
InvalidSignatureV // Deprecated in v4.8
}
function_throwError(RecoverError error) privatepure{
if (error == RecoverError.NoError) {
return; // no error: do nothing
} elseif (error == RecoverError.InvalidSignature) {
revert("ECDSA: invalid signature");
} elseif (error == RecoverError.InvalidSignatureLength) {
revert("ECDSA: invalid signature length");
} elseif (error == RecoverError.InvalidSignatureS) {
revert("ECDSA: invalid signature 's' value");
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature` or error string. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*
* Documentation for signature generation:
* - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
* - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
*
* _Available since v4.3._
*/functiontryRecover(bytes32 hash, bytesmemory signature) internalpurereturns (address, RecoverError) {
if (signature.length==65) {
bytes32 r;
bytes32 s;
uint8 v;
// ecrecover takes the signature parameters, and the only way to get them// currently is to use assembly./// @solidity memory-safe-assemblyassembly {
r :=mload(add(signature, 0x20))
s :=mload(add(signature, 0x40))
v :=byte(0, mload(add(signature, 0x60)))
}
return tryRecover(hash, v, r, s);
} else {
return (address(0), RecoverError.InvalidSignatureLength);
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature`. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*/functionrecover(bytes32 hash, bytesmemory signature) internalpurereturns (address) {
(address recovered, RecoverError error) = tryRecover(hash, signature);
_throwError(error);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
*
* See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
*
* _Available since v4.3._
*/functiontryRecover(bytes32 hash,
bytes32 r,
bytes32 vs
) internalpurereturns (address, RecoverError) {
bytes32 s = vs &bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
uint8 v =uint8((uint256(vs) >>255) +27);
return tryRecover(hash, v, r, s);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
*
* _Available since v4.2._
*/functionrecover(bytes32 hash,
bytes32 r,
bytes32 vs
) internalpurereturns (address) {
(address recovered, RecoverError error) = tryRecover(hash, r, vs);
_throwError(error);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `v`,
* `r` and `s` signature fields separately.
*
* _Available since v4.3._
*/functiontryRecover(bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internalpurereturns (address, RecoverError) {
// EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature// unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines// the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most// signatures from current libraries generate a unique signature with an s-value in the lower half order.//// If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value// with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or// vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept// these malleable signatures as well.if (uint256(s) >0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
return (address(0), RecoverError.InvalidSignatureS);
}
// If the signature is valid (and not malleable), return the signer addressaddress signer =ecrecover(hash, v, r, s);
if (signer ==address(0)) {
return (address(0), RecoverError.InvalidSignature);
}
return (signer, RecoverError.NoError);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `v`,
* `r` and `s` signature fields separately.
*/functionrecover(bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internalpurereturns (address) {
(address recovered, RecoverError error) = tryRecover(hash, v, r, s);
_throwError(error);
return recovered;
}
/**
* @dev Returns an Ethereum Signed Message, created from a `hash`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/functiontoEthSignedMessageHash(bytes32 hash) internalpurereturns (bytes32) {
// 32 is the length in bytes of hash,// enforced by the type signature abovereturnkeccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
}
/**
* @dev Returns an Ethereum Signed Message, created from `s`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/functiontoEthSignedMessageHash(bytesmemory s) internalpurereturns (bytes32) {
returnkeccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s));
}
/**
* @dev Returns an Ethereum Signed Typed Data, created from a
* `domainSeparator` and a `structHash`. This produces hash corresponding
* to the one signed with the
* https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
* JSON-RPC method as part of EIP-712.
*
* See {recover}.
*/functiontoTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internalpurereturns (bytes32) {
returnkeccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
}
}
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)pragmasolidity ^0.8.0;import"./IERC165.sol";
/**
* @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.
*/abstractcontractERC165isIERC165{
/**
* @dev See {IERC165-supportsInterface}.
*/functionsupportsInterface(bytes4 interfaceId) publicviewvirtualoverridereturns (bool) {
return interfaceId ==type(IERC165).interfaceId;
}
}
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC1155/IERC1155.sol)pragmasolidity ^0.8.0;import"../../utils/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC1155 compliant contract, as defined in the
* https://eips.ethereum.org/EIPS/eip-1155[EIP].
*
* _Available since v3.1._
*/interfaceIERC1155isIERC165{
/**
* @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
*/eventTransferSingle(addressindexed operator, addressindexedfrom, addressindexed to, uint256 id, uint256 value);
/**
* @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
* transfers.
*/eventTransferBatch(addressindexed operator,
addressindexedfrom,
addressindexed to,
uint256[] ids,
uint256[] values
);
/**
* @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
* `approved`.
*/eventApprovalForAll(addressindexed account, addressindexed operator, bool approved);
/**
* @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
*
* If an {URI} event was emitted for `id`, the standard
* https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
* returned by {IERC1155MetadataURI-uri}.
*/eventURI(string value, uint256indexed id);
/**
* @dev Returns the amount of tokens of token type `id` owned by `account`.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/functionbalanceOf(address account, uint256 id) externalviewreturns (uint256);
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
*
* Requirements:
*
* - `accounts` and `ids` must have the same length.
*/functionbalanceOfBatch(address[] calldata accounts, uint256[] calldata ids)
externalviewreturns (uint256[] memory);
/**
* @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
*
* Emits an {ApprovalForAll} event.
*
* Requirements:
*
* - `operator` cannot be the caller.
*/functionsetApprovalForAll(address operator, bool approved) external;
/**
* @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
*
* See {setApprovalForAll}.
*/functionisApprovedForAll(address account, address operator) externalviewreturns (bool);
/**
* @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - If the caller is not `from`, it must have been approved to spend ``from``'s tokens via {setApprovalForAll}.
* - `from` must have a balance of tokens of type `id` of at least `amount`.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/functionsafeTransferFrom(addressfrom,
address to,
uint256 id,
uint256 amount,
bytescalldata data
) external;
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
*
* Emits a {TransferBatch} event.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/functionsafeBatchTransferFrom(addressfrom,
address to,
uint256[] calldata ids,
uint256[] calldata amounts,
bytescalldata data
) external;
}
Contract Source Code
File 15 of 41: 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 16 of 41: IERC721.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.8.0) (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: 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.
*/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);
}
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol)pragmasolidity ^0.8.0;/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/interfaceIERC721Receiver{
/**
* @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`.
*/functiononERC721Received(address operator,
addressfrom,
uint256 tokenId,
bytescalldata data
) externalreturns (bytes4);
}
Contract Source Code
File 19 of 41: IOperatorFilterRegistry.sol
// SPDX-License-Identifier: MITpragmasolidity ^0.8.13;interfaceIOperatorFilterRegistry{
/**
* @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.
*/functionisOperatorAllowed(address registrant, address operator) externalviewreturns (bool);
/**
* @notice Registers an address with the registry. May be called by address itself or by EIP-173 owner.
*/functionregister(address registrant) external;
/**
* @notice Registers an address with the registry and "subscribes" to another address's filtered operators and codeHashes.
*/functionregisterAndSubscribe(address registrant, address subscription) external;
/**
* @notice Registers an address with the registry and copies the filtered operators and codeHashes from another
* address without subscribing.
*/functionregisterAndCopyEntries(address registrant, address registrantToCopy) external;
/**
* @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.
*/functionunregister(address addr) external;
/**
* @notice Update an operator address for a registered address - when filtered is true, the operator is filtered.
*/functionupdateOperator(address registrant, address operator, bool filtered) external;
/**
* @notice Update multiple operators for a registered address - when filtered is true, the operators will be filtered. Reverts on duplicates.
*/functionupdateOperators(address registrant, address[] calldata operators, bool filtered) external;
/**
* @notice Update a codeHash for a registered address - when filtered is true, the codeHash is filtered.
*/functionupdateCodeHash(address registrant, bytes32 codehash, bool filtered) external;
/**
* @notice Update multiple codeHashes for a registered address - when filtered is true, the codeHashes will be filtered. Reverts on duplicates.
*/functionupdateCodeHashes(address registrant, bytes32[] calldata codeHashes, bool filtered) external;
/**
* @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.
*/functionsubscribe(address registrant, address registrantToSubscribe) external;
/**
* @notice Unsubscribe an address from its current subscribed registrant, and optionally copy its filtered operators and codeHashes.
*/functionunsubscribe(address registrant, bool copyExistingEntries) external;
/**
* @notice Get the subscription address of a given registrant, if any.
*/functionsubscriptionOf(address addr) externalreturns (address registrant);
/**
* @notice Get the set of addresses subscribed to a given registrant.
* Note that order is not guaranteed as updates are made.
*/functionsubscribers(address registrant) externalreturns (address[] memory);
/**
* @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.
*/functionsubscriberAt(address registrant, uint256 index) externalreturns (address);
/**
* @notice Copy filtered operators and codeHashes from a different registrantToCopy to addr.
*/functioncopyEntriesOf(address registrant, address registrantToCopy) external;
/**
* @notice Returns true if operator is filtered by a given address or its subscription.
*/functionisOperatorFiltered(address registrant, address operator) externalreturns (bool);
/**
* @notice Returns true if the hash of an address's code is filtered by a given address or its subscription.
*/functionisCodeHashOfFiltered(address registrant, address operatorWithCode) externalreturns (bool);
/**
* @notice Returns true if a codeHash is filtered by a given address or its subscription.
*/functionisCodeHashFiltered(address registrant, bytes32 codeHash) externalreturns (bool);
/**
* @notice Returns a list of filtered operators for a given address or its subscription.
*/functionfilteredOperators(address addr) externalreturns (address[] memory);
/**
* @notice Returns the set of filtered codeHashes for a given address or its subscription.
* Note that order is not guaranteed as updates are made.
*/functionfilteredCodeHashes(address addr) externalreturns (bytes32[] memory);
/**
* @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.
*/functionfilteredOperatorAt(address registrant, uint256 index) externalreturns (address);
/**
* @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.
*/functionfilteredCodeHashAt(address registrant, uint256 index) externalreturns (bytes32);
/**
* @notice Returns true if an address has registered
*/functionisRegistered(address addr) externalreturns (bool);
/**
* @dev Convenience method to compute the code hash of an arbitrary contract
*/functioncodeHashOf(address addr) externalreturns (bytes32);
}
// SPDX-License-Identifier: MITpragmasolidity ^0.8.17;import"@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol";
import"@openzeppelin/contracts/utils/Address.sol";
import"./Lockable.sol";
import { LockableStatus,InvalidTransferRecipient,TokenIsSoulBound,ContractIsNot721Receiver } from"./SetLockable.sol";
abstractcontractLockableTransferrableisLockable{
usingAddressforaddress;
functionapprove(address to, uint256 tokenId) publicvirtualoverride{
validateLock(tokenId);
super.approve(to,tokenId);
}
functionsetApprovalForAll(address operator, bool approved) publicvirtualoverride{
if (tokensOwnedBy(msg.sender).length>0) {
validateLock(tokensOwnedBy(msg.sender)[0]);
} elseif (soulBound) {
revert TokenIsSoulBound();
}
super.setApprovalForAll(operator,approved);
}
functiontransferFrom(addressfrom,
address to,
uint256 tokenId
) publicvirtualoverride{
validateApprovedOrOwner(msg.sender, tokenId);
// if (soulBound) revert TokenIsSoulBound();
validateLock(tokenId);
_transfer(from,to,tokenId);
}
function_transfer(addressfrom,
address to,
uint256 tokenId
) internal{
if(to ==address(0)) {
revert InvalidTransferRecipient();
}
revokeTokenApproval(tokenId);
if (enumerationExists(tokenId)) {
swapOwner(from,to,tokenId);
}
packedTransferFrom(from, to, tokenId);
completeTransfer(from,to,tokenId);
}
functioncompleteTransfer(addressfrom,
address to,
uint256 tokenId) internal{
emit Transfer(from, to, tokenId);
}
functionsafeTransferFrom(addressfrom,
address to,
uint256 tokenId
) publicvirtualoverride{
safeTransferFrom(from, to, tokenId, "");
}
functionsafeTransferFrom(addressfrom,
address to,
uint256 tokenId,
bytesmemory data
) publicvirtualoverride{
validateApprovedOrOwner(msg.sender, tokenId);
validateLock(tokenId);
_safeTransfer(from, to, tokenId, data);
}
function_safeTransfer(addressfrom,
address to,
uint256 tokenId,
bytesmemory data
) internalvirtual{
if (!_checkOnERC721Received(from, to, tokenId, data)) {
revert ContractIsNot721Receiver();
}
_transfer(from, to, tokenId);
}
function_checkOnERC721Received(addressfrom,
address to,
uint256 tokenId,
bytesmemory data
) privatereturns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(msg.sender, from, tokenId, data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytesmemory reason) {
if (reason.length==0) {
revert InvalidTransferRecipient();
} else {
/// @solidity memory-safe-assemblyassembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
returntrue;
}
}
}
Contract Source Code
File 22 of 41: Math.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/Math.sol)pragmasolidity ^0.8.0;/**
* @dev Standard math utilities missing in the Solidity language.
*/libraryMath{
enumRounding {
Down, // Toward negative infinity
Up, // Toward infinity
Zero // Toward zero
}
/**
* @dev Returns the largest of two numbers.
*/functionmax(uint256 a, uint256 b) internalpurereturns (uint256) {
return a > b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/functionmin(uint256 a, uint256 b) internalpurereturns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/functionaverage(uint256 a, uint256 b) internalpurereturns (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.
*/functionceilDiv(uint256 a, uint256 b) internalpurereturns (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.
*/functionmulDiv(uint256 x,
uint256 y,
uint256 denominator
) internalpurereturns (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 productuint256 prod1; // Most significant 256 bits of the productassembly {
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.
*/functionmulDiv(uint256 x,
uint256 y,
uint256 denominator,
Rounding rounding
) internalpurereturns (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).
*/functionsqrt(uint256 a) internalpurereturns (uint256) {
if (a ==0) {
return0;
}
// 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.
*/functionsqrt(uint256 a, Rounding rounding) internalpurereturns (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.
*/functionlog2(uint256 value) internalpurereturns (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.
*/functionlog2(uint256 value, Rounding rounding) internalpurereturns (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.
*/functionlog10(uint256 value) internalpurereturns (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.
*/functionlog10(uint256 value, Rounding rounding) internalpurereturns (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.
*/functionlog256(uint256 value) internalpurereturns (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.
*/functionlog256(uint256 value, Rounding rounding) internalpurereturns (uint256) {
unchecked {
uint256 result = log256(value);
return result + (rounding == Rounding.Up &&1<< (result *8) < value ? 1 : 0);
}
}
}
// SPDX-License-Identifier: MITpragmasolidity ^0.8.13;import {IOperatorFilterRegistry} from"./IOperatorFilterRegistry.sol";
import {CANONICAL_OPERATOR_FILTER_REGISTRY_ADDRESS} from"./lib/Constants.sol";
/**
* @title OperatorFilterer
* @notice Abstract contract whose constructor automatically registers and optionally subscribes to or copies another
* registrant's entries in the OperatorFilterRegistry.
* @dev This smart contract is meant to be inherited by token contracts so they can use the following:
* - `onlyAllowedOperator` modifier for `transferFrom` and `safeTransferFrom` methods.
* - `onlyAllowedOperatorApproval` modifier for `approve` and `setApprovalForAll` methods.
* Please note that if your token contract does not provide an owner with EIP-173, it must provide
* administration methods on the contract itself to interact with the registry otherwise the subscription
* will be locked to the options set during construction.
*/abstractcontractOperatorFilterer{
/// @dev Emitted when an operator is not allowed.errorOperatorNotAllowed(address operator);
IOperatorFilterRegistry publicconstant OPERATOR_FILTER_REGISTRY =
IOperatorFilterRegistry(CANONICAL_OPERATOR_FILTER_REGISTRY_ADDRESS);
/// @dev The constructor that is called when the contract is being deployed.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));
}
}
}
}
/**
* @dev A helper function to check if an operator is allowed.
*/modifieronlyAllowedOperator(addressfrom) 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);
}
_;
}
/**
* @dev A helper function to check if an operator approval is allowed.
*/modifieronlyAllowedOperatorApproval(address operator) virtual{
_checkFilterOperator(operator);
_;
}
/**
* @dev A helper function to check if an operator is allowed.
*/function_checkFilterOperator(address operator) internalviewvirtual{
// Check registry code length to facilitate testing in environments without a deployed registry.if (address(OPERATOR_FILTER_REGISTRY).code.length>0) {
// under normal circumstances, this function will revert rather than return false, but inheriting contracts// may specify their own OperatorFilterRegistry implementations, which may behave differentlyif (!OPERATOR_FILTER_REGISTRY.isOperatorAllowed(address(this), operator)) {
revert OperatorNotAllowed(operator);
}
}
}
}
Contract Source Code
File 26 of 41: Ownable.sol
// SPDX-License-Identifier: MITpragmasolidity ^0.8.17;/**
* @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.
*/abstractcontractOwnable{
addressprivate _owner;
errorCallerIsNotOwner(address caller);
errorOwnerCannotBeZeroAddress();
eventOwnershipTransferred(addressindexed previousOwner, addressindexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/constructor() {
_transferOwnership(msg.sender);
}
/**
* @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{
if (owner() !=msg.sender) {
revert CallerIsNotOwner(msg.sender);
}
}
/**
* @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{
if(newOwner ==address(0)) {
revert OwnerCannotBeZeroAddress();
}
_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);
}
}
// SPDX-License-Identifier: MITpragmasolidity ^0.8.17;import"@openzeppelin/contracts/utils/Strings.sol";
import"@openzeppelin/contracts/utils/Base64.sol";
bytesconstant description =abi.encodePacked(unicode"Female Apiens, born from the heart of the Apiens community, carry a powerful mission: to uplift and empower women. By giving them wings to build businesses centered around their unique strengths, these cherished collections not only unlock exciting possibilities but also offer incredible opportunities for female Apiens to soar.");
structRenderableData {
uint256 num;
}
librarySetContractMetadataRenderable{
usingStringsforuint256;
functionencodedContractURI(RenderableData storage, bytesmemory imageUri, uint256 royalty_basis, address recipient) publicpurereturns (stringmemory) {
bytesmemory dataURI =abi.encodePacked(
'{',
'"name": "Queen Apiens"',
',"description": "',string(description),'"',
',"image":"',string(imageUri),'"',
',"external_link":"https://theapiens.com/"',
',"seller_fee_basis_points":', royalty_basis.toString(),
',"fee_recipient":"', Strings.toHexString(uint160(recipient), 20),'"''}'
);
returnstring(
abi.encodePacked(
"data:application/json;base64,",
Base64.encode(dataURI)
)
);
}
}
Contract Source Code
File 34 of 41: SetFlexibleMetadata.sol
// SPDX-License-Identifier: MITpragmasolidity ^0.8.17;structFlexibleMetadataData {
string defaultTokenMetadata;
string prerevealTokenMetadata;
string flaggedTokenMetadata;
mapping(string=>string) supplementalTokenMetadata;
string contractMetadata;
mapping(uint256=>bool) tokenFlag;
mapping(uint256=> Supplement) supplemental;
bool tokenReveal;
}
structSupplement {
string key;
bool exists;
}
bytes16constant _SYMBOLS ="0123456789abcdef";
uint256constant DEFAULT =1;
uint256constant FLAG =2;
uint256constant PRE =3;
librarySetFlexibleMetadata{
functionsetDefaultTokenMetadataURI(FlexibleMetadataData storageself, stringmemory uri) public{
self.defaultTokenMetadata = uri;
}
functionsetPrerevealTokenMetadataURI(FlexibleMetadataData storageself, stringmemory uri) public{
self.prerevealTokenMetadata = uri;
}
functionsetFlaggedTokenMetadataURI(FlexibleMetadataData storageself, stringmemory uri) public{
self.flaggedTokenMetadata = uri;
}
functionsetSupplementalTokenMetadataURI(FlexibleMetadataData storageself, stringmemory key, stringmemory uri) public{
self.supplementalTokenMetadata[key] = uri;
}
functionsetContractMetadataURI(FlexibleMetadataData storageself, stringmemory uri) public{
self.contractMetadata = uri;
}
functionreveal(FlexibleMetadataData storageself, bool revealed) public{
self.tokenReveal = revealed;
}
functionflagToken(FlexibleMetadataData storageself, uint256 tokenId, bool flagged) public{
self.tokenFlag[tokenId] = flagged;
}
functiongetTokenMetadata(FlexibleMetadataData storageself, uint256 tokenId) publicviewreturns (stringmemory) {
if (self.tokenFlag[tokenId]) {
return encodeURI(self.flaggedTokenMetadata,tokenId);
}
if (!self.tokenReveal) {
return encodeURI(self.prerevealTokenMetadata,tokenId);
}
if (self.supplemental[tokenId].exists) {
return encodeURI(self.supplementalTokenMetadata[self.supplemental[tokenId].key],tokenId);
}
return encodeURI(self.defaultTokenMetadata,tokenId);
}
functiongetContractMetadata(FlexibleMetadataData storageself) publicviewreturns (stringmemory) {
returnself.contractMetadata;
}
functionencodeURI(stringstorage uri, uint256 tokenId) publicpurereturns (stringmemory) {
returnstring(abi.encodePacked(uri, "/", toString(tokenId)));
}
functiontoString(uint256 value) publicpurereturns (stringmemory) {
unchecked {
uint256 length = log10(value) +1;
stringmemory buffer =newstring(length);
uint256 ptr;
/// @solidity memory-safe-assemblyassembly {
ptr :=add(buffer, add(32, length))
}
while (true) {
ptr--;
/// @solidity memory-safe-assemblyassembly {
mstore8(ptr, byte(mod(value, 10), _SYMBOLS))
}
value /=10;
if (value ==0) break;
}
return buffer;
}
}
functionlog10(uint256 value) publicpurereturns (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;
}
}
// SPDX-License-Identifier: MITpragmasolidity ^0.8.17;/**
* 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;
}
structDualAuxData {
uint32 data1;
uint32 data2;
}
structQuadAuxData {
uint16 data1;
uint16 data2;
uint16 data3;
uint16 data4;
}
structOctAuxData {
uint8 data1;
uint8 data2;
uint8 data3;
uint8 data4;
uint8 data5;
uint8 data6;
uint8 data7;
uint8 data8;
}
// 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 owner address to address data.//// Bits Layout:// - [0..63] `balance`// - [64..127] `numberMinted`// - [128..191] `numberBurned`// - [192..255] `aux`structPackableData {
mapping(uint256=>uint256) _packedOwnerships;
mapping(address=>uint256) _packedAddressData;
uint256 _currentIndex;
uint256 _burnCounter;
}
librarySetPackable{
// =============================================================// 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;
// =============================================================// ADDRESS DATA OPERATIONS// =============================================================/**
* @dev Returns the number of tokens in `owner`'s account.
*/functionbalanceOf(PackableData storageself, address owner) publicviewreturns (uint256) {
if (owner ==address(0)) revert BalanceQueryForZeroAddress();
returnself._packedAddressData[owner] & _BITMASK_ADDRESS_DATA_ENTRY;
}
/**
* Returns the number of tokens minted by `owner`.
*/function_numberMinted(PackableData storageself,address owner) publicviewreturns (uint256) {
return (self._packedAddressData[owner] >> _BITPOS_NUMBER_MINTED) & _BITMASK_ADDRESS_DATA_ENTRY;
}
/**
* Returns the number of tokens burned by or on behalf of `owner`.
*/function_numberBurned(PackableData storageself,address owner) publicviewreturns (uint256) {
return (self._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(PackableData storageself,address owner) publicviewreturns (uint64 aux) {
returnuint64(self._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(PackableData storageself, address owner, uint64 aux) public{
uint256 packed =self._packedAddressData[owner];
uint256 auxCasted;
// Cast `aux` with assembly to avoid redundant masking.assembly {
auxCasted := aux
}
packed = (packed & _BITMASK_AUX_COMPLEMENT) | (auxCasted << _BITPOS_AUX);
self._packedAddressData[owner] = packed;
}
functiongetAux16(PackableData storageself, address owner) publicviewreturns (uint16[4] memory) {
uint32[2] memory packed32 = unpack64(self,_getAux(self,owner));
uint16[2] memory pack16a = unpack32(self,packed32[0]);
uint16[2] memory pack16b = unpack32(self,packed32[1]);
return [pack16a[0],pack16a[1],pack16b[0],pack16b[1]];
}
functionpack16(PackableData storage, uint8 pack1, uint8 pack2) publicpurereturns (uint16) {
return (uint16(pack2) <<8) | pack1;
}
functionpack32(PackableData storage, uint16 pack1, uint16 pack2) publicpurereturns (uint32) {
return (uint32(pack2) <<16) | pack1;
}
functionpack64(PackableData storage, uint32 pack1, uint32 pack2) publicpurereturns (uint64) {
return (uint64(pack2) <<32) | pack1;
}
functionunpack64(PackableData storage, uint64 packed) publicpurereturns (uint32[2] memory unpacked){
uint32 pack2 =uint32(packed >>32);
uint32 pack1 =uint32(packed);
return [pack1, pack2];
}
functionunpack32(PackableData storage, uint32 packed) publicpurereturns (uint16[2] memory unpacked){
uint16 pack2 =uint16(packed >>16);
uint16 pack1 =uint16(packed);
return [pack1, pack2];
}
functionunpack16(PackableData storage, uint16 packed) publicpurereturns (uint8[2] memory unpacked){
uint8 pack2 =uint8(packed >>8);
uint8 pack1 =uint8(packed);
return [pack1, pack2];
}
// =============================================================// OWNERSHIPS OPERATIONS// =============================================================/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/functionownerOf(PackableData storageself, uint256 tokenId) publicviewreturns (address) {
returnaddress(uint160(_packedOwnershipOf(self,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(PackableData storageself, uint256 tokenId) internalviewreturns (TokenOwnership memory) {
return _unpackedOwnership(_packedOwnershipOf(self,tokenId));
}
/**
* @dev Returns the unpacked `TokenOwnership` struct at `index`.
*/function_ownershipAt(PackableData storageself, uint256 index) internalviewreturns (TokenOwnership memory) {
return _unpackedOwnership(self._packedOwnerships[index]);
}
/**
* @dev Initializes the ownership slot minted at `index` for efficiency purposes.
*/function_initializeOwnershipAt(PackableData storageself, uint256 index) internal{
if (self._packedOwnerships[index] ==0) {
self._packedOwnerships[index] = _packedOwnershipOf(self,index);
}
}
/**
* Returns the packed ownership data of `tokenId`.
*/function_packedOwnershipOf(PackableData storageself, uint256 tokenId) privateviewreturns (uint256) {
uint256 curr = tokenId;
unchecked {
if (_startTokenId(self) <= curr)
if (curr <self._currentIndex) {
uint256 packed =self._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 =self._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))
}
}
/**
* @dev Returns the starting token ID.
* To change the starting token ID, please override this function.
*/function_startTokenId(PackableData storage) internalpurereturns (uint256) {
return0;
}
/**
* @dev Returns the next token ID to be minted.
*/function_nextTokenId(PackableData storageself) publicviewreturns (uint256) {
returnself._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(PackableData storageself) publicviewreturns (uint256) {
// Counter underflow is impossible as _burnCounter cannot be incremented// more than `_currentIndex - _startTokenId()` times.unchecked {
returnself._currentIndex -self._burnCounter;
}
}
/**
* @dev Returns the total amount of tokens minted in the contract.
*/function_totalMinted(PackableData storageself) publicviewreturns (uint256) {
// Counter underflow is impossible as `_currentIndex` does not decrement,// and it is initialized to `_startTokenId()`.unchecked {
returnself._currentIndex;
}
}
/**
* @dev Returns the total number of tokens burned.
*/function_totalBurned(PackableData storageself) publicviewreturns (uint256) {
returnself._burnCounter;
}
/**
* @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(PackableData storageself, uint256 tokenId) publicviewreturns (bool) {
return
_startTokenId(self) <= tokenId &&
tokenId <self._currentIndex &&// If within bounds,self._packedOwnerships[tokenId] & _BITMASK_BURNED ==0; // and not burned.
}
// =============================================================// TRANSFER OPERATIONS// =============================================================functiontransferFrom(
PackableData storageself,
addressfrom,
address to,
uint256 tokenId
) public{
uint256 prevOwnershipPacked = _packedOwnershipOf(self,tokenId);
if (address(uint160(prevOwnershipPacked)) !=from) revert TransferFromIncorrectOwner();
if (to ==address(0)) revert TransferToZeroAddress();
// 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.--self._packedAddressData[from]; // Updates: `balance -= 1`.++self._packedAddressData[to]; // Updates: `balance += 1`.// Updates:// - `address` to the next owner.// - `startTimestamp` to the timestamp of transfering.// - `burned` to `false`.// - `nextInitialized` to `true`.self._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 (self._packedOwnerships[nextTokenId] ==0) {
// If the next slot is within bounds.if (nextTokenId !=self._currentIndex) {
// Initialize the next slot to maintain correctness for `ownerOf(tokenId + 1)`.self._packedOwnerships[nextTokenId] = prevOwnershipPacked;
}
}
}
}
}
// =============================================================// 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(PackableData storageself, address to, uint256 quantity) publicreturns (uint256) {
uint256 startTokenId =self._currentIndex;
if (quantity ==0) revert MintZeroQuantity();
// 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`.self._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`.self._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();
self._currentIndex = end;
}
returnself._currentIndex;
}
// =============================================================// BURN OPERATIONS// =============================================================function_burn(PackableData storageself, uint256 tokenId) public{
uint256 prevOwnershipPacked = _packedOwnershipOf(self,tokenId);
addressfrom=address(uint160(prevOwnershipPacked));
// 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;`.self._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`.self._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 (self._packedOwnerships[nextTokenId] ==0) {
// If the next slot is within bounds.if (nextTokenId !=self._currentIndex) {
// Initialize the next slot to maintain correctness for `ownerOf(tokenId + 1)`.self._packedOwnerships[nextTokenId] = prevOwnershipPacked;
}
}
}
}
// Overflow not possible, as _burnCounter cannot be exceed _currentIndex times.unchecked {
self._burnCounter++;
}
}
// =============================================================// EXTRA DATA OPERATIONS// =============================================================/**
* @dev Directly sets the extra data for the ownership data `index`.
*/function_setExtraDataAt(PackableData storageself, uint256 index, uint24 extraData) public{
uint256 packed =self._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);
self._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
) publicviewreturns (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 Converts a uint256 to its ASCII string decimal representation.
*/function_toString(uint256 value) publicpurereturns (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)
}
}
}