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File 1 of 43 : AccessControlUpgradeable.sol

// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v5.0.0) (access/AccessControl.sol)pragma solidity ^0.8.20;import {IAccessControl} from "@openzeppelin/contracts/access/IAccessControl.sol";import {ContextUpgradeable} from "../utils/ContextUpgradeable.sol";import {ERC165Upgradeable} from "../utils/introspection/ERC165Upgradeable.sol";import {Initializable} from "../proxy/utils/Initializable.sol";/** * @dev Contract module that allows children to implement role-based access * control mechanisms. This is a lightweight version that doesn't allow enumerating role * members except through off-chain means by accessing the contract event logs. Some * applications may benefit from on-chain enumerability, for those cases see * {AccessControlEnumerable}. * * Roles are referred to by their `bytes32` identifier. These should be exposed * in the external API and be unique. The best way to achieve this is by * using `public constant` hash digests: * * ```solidity * bytes32 public constant MY_ROLE = keccak256("MY_ROLE"); * ``` * * Roles can be used to represent a set of permissions. To restrict access to a * function call, use {hasRole}: * * ```solidity * function foo() public { * require(hasRole(MY_ROLE, msg.sender)); * ... * } * ``` * * Roles can be granted and revoked dynamically via the {grantRole} and * {revokeRole} functions. Each role has an associated admin role, and only * accounts that have a role's admin role can call {grantRole} and {revokeRole}. * * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means * that only accounts with this role will be able to grant or revoke other * roles. More complex role relationships can be created by using * {_setRoleAdmin}. * * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to * grant and revoke this role. Extra precautions should be taken to secure * accounts that have been granted it. We recommend using {AccessControlDefaultAdminRules} * to enforce additional security measures for this role. */abstract contract AccessControlUpgradeable is Initializable, ContextUpgradeable, IAccessControl, ERC165Upgradeable { struct RoleData { mapping(address account => bool) hasRole; bytes32 adminRole; } bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00; /// @custom:storage-location erc7201:openzeppelin.storage.AccessControl struct AccessControlStorage { mapping(bytes32 role => RoleData) _roles; } // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.AccessControl")) - 1)) & ~bytes32(uint256(0xff)) bytes32 private constant AccessControlStorageLocation = 0x02dd7bc7dec4dceedda775e58dd541e08a116c6c53815c0bd028192f7b626800; function _getAccessControlStorage() private pure returns (AccessControlStorage storage $) { assembly { $.slot := AccessControlStorageLocation } } /** * @dev Modifier that checks that an account has a specific role. Reverts * with an {AccessControlUnauthorizedAccount} error including the required role. */ modifier onlyRole(bytes32 role) { _checkRole(role); _; } function __AccessControl_init() internal onlyInitializing { } function __AccessControl_init_unchained() internal onlyInitializing { } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId); } /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) public view virtual returns (bool) { AccessControlStorage storage $ = _getAccessControlStorage(); return $._roles[role].hasRole[account]; } /** * @dev Reverts with an {AccessControlUnauthorizedAccount} error if `_msgSender()` * is missing `role`. Overriding this function changes the behavior of the {onlyRole} modifier. */ function _checkRole(bytes32 role) internal view virtual { _checkRole(role, _msgSender()); } /** * @dev Reverts with an {AccessControlUnauthorizedAccount} error if `account` * is missing `role`. */ function _checkRole(bytes32 role, address account) internal view virtual { if (!hasRole(role, account)) { revert AccessControlUnauthorizedAccount(account, role); } } /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) public view virtual returns (bytes32) { AccessControlStorage storage $ = _getAccessControlStorage(); return $._roles[role].adminRole; } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. * * May emit a {RoleGranted} event. */ function grantRole(bytes32 role, address account) public virtual onlyRole(getRoleAdmin(role)) { _grantRole(role, account); } /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. * * May emit a {RoleRevoked} event. */ function revokeRole(bytes32 role, address account) public virtual onlyRole(getRoleAdmin(role)) { _revokeRole(role, account); } /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been revoked `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `callerConfirmation`. * * May emit a {RoleRevoked} event. */ function renounceRole(bytes32 role, address callerConfirmation) public virtual { if (callerConfirmation != _msgSender()) { revert AccessControlBadConfirmation(); } _revokeRole(role, callerConfirmation); } /** * @dev Sets `adminRole` as ``role``'s admin role. * * Emits a {RoleAdminChanged} event. */ function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual { AccessControlStorage storage $ = _getAccessControlStorage(); bytes32 previousAdminRole = getRoleAdmin(role); $._roles[role].adminRole = adminRole; emit RoleAdminChanged(role, previousAdminRole, adminRole); } /** * @dev Attempts to grant `role` to `account` and returns a boolean indicating if `role` was granted. * * Internal function without access restriction. * * May emit a {RoleGranted} event. */ function _grantRole(bytes32 role, address account) internal virtual returns (bool) { AccessControlStorage storage $ = _getAccessControlStorage(); if (!hasRole(role, account)) { $._roles[role].hasRole[account] = true; emit RoleGranted(role, account, _msgSender()); return true; } else { return false; } } /** * @dev Attempts to revoke `role` to `account` and returns a boolean indicating if `role` was revoked. * * Internal function without access restriction. * * May emit a {RoleRevoked} event. */ function _revokeRole(bytes32 role, address account) internal virtual returns (bool) { AccessControlStorage storage $ = _getAccessControlStorage(); if (hasRole(role, account)) { $._roles[role].hasRole[account] = false; emit RoleRevoked(role, account, _msgSender()); return true; } else { return false; } }}

File 2 of 43 : Ownable2StepUpgradeable.sol

// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable2Step.sol)pragma solidity ^0.8.20;import {OwnableUpgradeable} from "./OwnableUpgradeable.sol";import {Initializable} from "../proxy/utils/Initializable.sol";/** * @dev Contract module which provides access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * The initial owner is specified at deployment time in the constructor for `Ownable`. This * can later be changed with {transferOwnership} and {acceptOwnership}. * * This module is used through inheritance. It will make available all functions * from parent (Ownable). */abstract contract Ownable2StepUpgradeable is Initializable, OwnableUpgradeable { /// @custom:storage-location erc7201:openzeppelin.storage.Ownable2Step struct Ownable2StepStorage { address _pendingOwner; } // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Ownable2Step")) - 1)) & ~bytes32(uint256(0xff)) bytes32 private constant Ownable2StepStorageLocation = 0x237e158222e3e6968b72b9db0d8043aacf074ad9f650f0d1606b4d82ee432c00; function _getOwnable2StepStorage() private pure returns (Ownable2StepStorage storage $) { assembly { $.slot := Ownable2StepStorageLocation } } event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner); function __Ownable2Step_init() internal onlyInitializing { } function __Ownable2Step_init_unchained() internal onlyInitializing { } /** * @dev Returns the address of the pending owner. */ function pendingOwner() public view virtual returns (address) { Ownable2StepStorage storage $ = _getOwnable2StepStorage(); return $._pendingOwner; } /** * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one. * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual override onlyOwner { Ownable2StepStorage storage $ = _getOwnable2StepStorage(); $._pendingOwner = newOwner; emit OwnershipTransferStarted(owner(), newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner. * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual override { Ownable2StepStorage storage $ = _getOwnable2StepStorage(); delete $._pendingOwner; super._transferOwnership(newOwner); } /** * @dev The new owner accepts the ownership transfer. */ function acceptOwnership() public virtual { address sender = _msgSender(); if (pendingOwner() != sender) { revert OwnableUnauthorizedAccount(sender); } _transferOwnership(sender); }}

File 3 of 43 : OwnableUpgradeable.sol

// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)pragma solidity ^0.8.20;import {ContextUpgradeable} from "../utils/ContextUpgradeable.sol";import {Initializable} from "../proxy/utils/Initializable.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. * * The initial owner is set to the address provided by the deployer. This can * later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable { /// @custom:storage-location erc7201:openzeppelin.storage.Ownable struct OwnableStorage { address _owner; } // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Ownable")) - 1)) & ~bytes32(uint256(0xff)) bytes32 private constant OwnableStorageLocation = 0x9016d09d72d40fdae2fd8ceac6b6234c7706214fd39c1cd1e609a0528c199300; function _getOwnableStorage() private pure returns (OwnableStorage storage $) { assembly { $.slot := OwnableStorageLocation } } /** * @dev The caller account is not authorized to perform an operation. */ error OwnableUnauthorizedAccount(address account); /** * @dev The owner is not a valid owner account. (eg. `address(0)`) */ error OwnableInvalidOwner(address owner); event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the address provided by the deployer as the initial owner. */ function __Ownable_init(address initialOwner) internal onlyInitializing { __Ownable_init_unchained(initialOwner); } function __Ownable_init_unchained(address initialOwner) internal onlyInitializing { if (initialOwner == address(0)) { revert OwnableInvalidOwner(address(0)); } _transferOwnership(initialOwner); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { OwnableStorage storage $ = _getOwnableStorage(); return $._owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { if (owner() != _msgSender()) { revert OwnableUnauthorizedAccount(_msgSender()); } } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby disabling any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { if (newOwner == address(0)) { revert OwnableInvalidOwner(address(0)); } _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { OwnableStorage storage $ = _getOwnableStorage(); address oldOwner = $._owner; $._owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); }}

File 4 of 43 : Initializable.sol

// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v5.0.0) (proxy/utils/Initializable.sol)pragma solidity ^0.8.20;/** * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect. * * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in * case an upgrade adds a module that needs to be initialized. * * For example: * * [.hljs-theme-light.nopadding] * ```solidity * contract MyToken is ERC20Upgradeable { * function initialize() initializer public { * __ERC20_init("MyToken", "MTK"); * } * } * * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable { * function initializeV2() reinitializer(2) public { * __ERC20Permit_init("MyToken"); * } * } * ``` * * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}. * * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity. * * [CAUTION] * ==== * Avoid leaving a contract uninitialized. * * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed: * * [.hljs-theme-light.nopadding] * ``` * /// @custom:oz-upgrades-unsafe-allow constructor * constructor() { * _disableInitializers(); * } * ``` * ==== */abstract contract Initializable { /** * @dev Storage of the initializable contract. * * It's implemented on a custom ERC-7201 namespace to reduce the risk of storage collisions * when using with upgradeable contracts. * * @custom:storage-location erc7201:openzeppelin.storage.Initializable */ struct InitializableStorage { /** * @dev Indicates that the contract has been initialized. */ uint64 _initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool _initializing; } // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Initializable")) - 1)) & ~bytes32(uint256(0xff)) bytes32 private constant INITIALIZABLE_STORAGE = 0xf0c57e16840df040f15088dc2f81fe391c3923bec73e23a9662efc9c229c6a00; /** * @dev The contract is already initialized. */ error InvalidInitialization(); /** * @dev The contract is not initializing. */ error NotInitializing(); /** * @dev Triggered when the contract has been initialized or reinitialized. */ event Initialized(uint64 version); /** * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope, * `onlyInitializing` functions can be used to initialize parent contracts. * * Similar to `reinitializer(1)`, except that in the context of a constructor an `initializer` may be invoked any * number of times. This behavior in the constructor can be useful during testing and is not expected to be used in * production. * * Emits an {Initialized} event. */ modifier initializer() { // solhint-disable-next-line var-name-mixedcase InitializableStorage storage $ = _getInitializableStorage(); // Cache values to avoid duplicated sloads bool isTopLevelCall = !$._initializing; uint64 initialized = $._initialized; // Allowed calls: // - initialSetup: the contract is not in the initializing state and no previous version was // initialized // - construction: the contract is initialized at version 1 (no reininitialization) and the // current contract is just being deployed bool initialSetup = initialized == 0 && isTopLevelCall; bool construction = initialized == 1 && address(this).code.length == 0; if (!initialSetup && !construction) { revert InvalidInitialization(); } $._initialized = 1; if (isTopLevelCall) { $._initializing = true; } _; if (isTopLevelCall) { $._initializing = false; emit Initialized(1); } } /** * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be * used to initialize parent contracts. * * A reinitializer may be used after the original initialization step. This is essential to configure modules that * are added through upgrades and that require initialization. * * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer` * cannot be nested. If one is invoked in the context of another, execution will revert. * * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in * a contract, executing them in the right order is up to the developer or operator. * * WARNING: Setting the version to 2**64 - 1 will prevent any future reinitialization. * * Emits an {Initialized} event. */ modifier reinitializer(uint64 version) { // solhint-disable-next-line var-name-mixedcase InitializableStorage storage $ = _getInitializableStorage(); if ($._initializing || $._initialized >= version) { revert InvalidInitialization(); } $._initialized = version; $._initializing = true; _; $._initializing = false; emit Initialized(version); } /** * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the * {initializer} and {reinitializer} modifiers, directly or indirectly. */ modifier onlyInitializing() { _checkInitializing(); _; } /** * @dev Reverts if the contract is not in an initializing state. See {onlyInitializing}. */ function _checkInitializing() internal view virtual { if (!_isInitializing()) { revert NotInitializing(); } } /** * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call. * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized * to any version. It is recommended to use this to lock implementation contracts that are designed to be called * through proxies. * * Emits an {Initialized} event the first time it is successfully executed. */ function _disableInitializers() internal virtual { // solhint-disable-next-line var-name-mixedcase InitializableStorage storage $ = _getInitializableStorage(); if ($._initializing) { revert InvalidInitialization(); } if ($._initialized != type(uint64).max) { $._initialized = type(uint64).max; emit Initialized(type(uint64).max); } } /** * @dev Returns the highest version that has been initialized. See {reinitializer}. */ function _getInitializedVersion() internal view returns (uint64) { return _getInitializableStorage()._initialized; } /** * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}. */ function _isInitializing() internal view returns (bool) { return _getInitializableStorage()._initializing; } /** * @dev Returns a pointer to the storage namespace. */ // solhint-disable-next-line var-name-mixedcase function _getInitializableStorage() private pure returns (InitializableStorage storage $) { assembly { $.slot := INITIALIZABLE_STORAGE } }}

File 5 of 43 : ERC721Upgradeable.sol

// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC721/ERC721.sol)pragma solidity ^0.8.20;import {IERC721} from "@openzeppelin/contracts/token/ERC721/IERC721.sol";import {IERC721Receiver} from "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol";import {IERC721Metadata} from "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol";import {ContextUpgradeable} from "../../utils/ContextUpgradeable.sol";import {Strings} from "@openzeppelin/contracts/utils/Strings.sol";import {IERC165} from "@openzeppelin/contracts/utils/introspection/IERC165.sol";import {ERC165Upgradeable} from "../../utils/introspection/ERC165Upgradeable.sol";import {IERC721Errors} from "@openzeppelin/contracts/interfaces/draft-IERC6093.sol";import {Initializable} from "../../proxy/utils/Initializable.sol";/** * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including * the Metadata extension, but not including the Enumerable extension, which is available separately as * {ERC721Enumerable}. */abstract contract ERC721Upgradeable is Initializable, ContextUpgradeable, ERC165Upgradeable, IERC721, IERC721Metadata, IERC721Errors { using Strings for uint256; /// @custom:storage-location erc7201:openzeppelin.storage.ERC721 struct ERC721Storage { // Token name string _name; // Token symbol string _symbol; mapping(uint256 tokenId => address) _owners; mapping(address owner => uint256) _balances; mapping(uint256 tokenId => address) _tokenApprovals; mapping(address owner => mapping(address operator => bool)) _operatorApprovals; } // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.ERC721")) - 1)) & ~bytes32(uint256(0xff)) bytes32 private constant ERC721StorageLocation = 0x80bb2b638cc20bc4d0a60d66940f3ab4a00c1d7b313497ca82fb0b4ab0079300; function _getERC721Storage() private pure returns (ERC721Storage storage $) { assembly { $.slot := ERC721StorageLocation } } /** * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection. */ function __ERC721_init(string memory name_, string memory symbol_) internal onlyInitializing { __ERC721_init_unchained(name_, symbol_); } function __ERC721_init_unchained(string memory name_, string memory symbol_) internal onlyInitializing { ERC721Storage storage $ = _getERC721Storage(); $._name = name_; $._symbol = symbol_; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165Upgradeable, IERC165) returns (bool) { return interfaceId == type(IERC721).interfaceId || interfaceId == type(IERC721Metadata).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC721-balanceOf}. */ function balanceOf(address owner) public view virtual returns (uint256) { ERC721Storage storage $ = _getERC721Storage(); if (owner == address(0)) { revert ERC721InvalidOwner(address(0)); } return $._balances[owner]; } /** * @dev See {IERC721-ownerOf}. */ function ownerOf(uint256 tokenId) public view virtual returns (address) { return _requireOwned(tokenId); } /** * @dev See {IERC721Metadata-name}. */ function name() public view virtual returns (string memory) { ERC721Storage storage $ = _getERC721Storage(); return $._name; } /** * @dev See {IERC721Metadata-symbol}. */ function symbol() public view virtual returns (string memory) { ERC721Storage storage $ = _getERC721Storage(); return $._symbol; } /** * @dev See {IERC721Metadata-tokenURI}. */ function tokenURI(uint256 tokenId) public view virtual returns (string memory) { _requireOwned(tokenId); string memory baseURI = _baseURI(); return bytes(baseURI).length > 0 ? string.concat(baseURI, tokenId.toString()) : ""; } /** * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each * token will be the concatenation of the `baseURI` and the `tokenId`. Empty * by default, can be overridden in child contracts. */ function _baseURI() internal view virtual returns (string memory) { return ""; } /** * @dev See {IERC721-approve}. */ function approve(address to, uint256 tokenId) public virtual { _approve(to, tokenId, _msgSender()); } /** * @dev See {IERC721-getApproved}. */ function getApproved(uint256 tokenId) public view virtual returns (address) { _requireOwned(tokenId); return _getApproved(tokenId); } /** * @dev See {IERC721-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public virtual { _setApprovalForAll(_msgSender(), operator, approved); } /** * @dev See {IERC721-isApprovedForAll}. */ function isApprovedForAll(address owner, address operator) public view virtual returns (bool) { ERC721Storage storage $ = _getERC721Storage(); return $._operatorApprovals[owner][operator]; } /** * @dev See {IERC721-transferFrom}. */ function transferFrom(address from, address to, uint256 tokenId) public virtual { if (to == address(0)) { revert ERC721InvalidReceiver(address(0)); } // Setting an "auth" arguments enables the `_isAuthorized` check which verifies that the token exists // (from != 0). Therefore, it is not needed to verify that the return value is not 0 here. address previousOwner = _update(to, tokenId, _msgSender()); if (previousOwner != from) { revert ERC721IncorrectOwner(from, tokenId, previousOwner); } } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom(address from, address to, uint256 tokenId) public { safeTransferFrom(from, to, tokenId, ""); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory data) public virtual { transferFrom(from, to, tokenId); _checkOnERC721Received(from, to, tokenId, data); } /** * @dev Returns the owner of the `tokenId`. Does NOT revert if token doesn't exist * * IMPORTANT: Any overrides to this function that add ownership of tokens not tracked by the * core ERC721 logic MUST be matched with the use of {_increaseBalance} to keep balances * consistent with ownership. The invariant to preserve is that for any address `a` the value returned by * `balanceOf(a)` must be equal to the number of tokens such that `_ownerOf(tokenId)` is `a`. */ function _ownerOf(uint256 tokenId) internal view virtual returns (address) { ERC721Storage storage $ = _getERC721Storage(); return $._owners[tokenId]; } /** * @dev Returns the approved address for `tokenId`. Returns 0 if `tokenId` is not minted. */ function _getApproved(uint256 tokenId) internal view virtual returns (address) { ERC721Storage storage $ = _getERC721Storage(); return $._tokenApprovals[tokenId]; } /** * @dev Returns whether `spender` is allowed to manage `owner`'s tokens, or `tokenId` in * particular (ignoring whether it is owned by `owner`). * * WARNING: This function assumes that `owner` is the actual owner of `tokenId` and does not verify this * assumption. */ function _isAuthorized(address owner, address spender, uint256 tokenId) internal view virtual returns (bool) { return spender != address(0) && (owner == spender || isApprovedForAll(owner, spender) || _getApproved(tokenId) == spender); } /** * @dev Checks if `spender` can operate on `tokenId`, assuming the provided `owner` is the actual owner. * Reverts if `spender` does not have approval from the provided `owner` for the given token or for all its assets * the `spender` for the specific `tokenId`. * * WARNING: This function assumes that `owner` is the actual owner of `tokenId` and does not verify this * assumption. */ function _checkAuthorized(address owner, address spender, uint256 tokenId) internal view virtual { if (!_isAuthorized(owner, spender, tokenId)) { if (owner == address(0)) { revert ERC721NonexistentToken(tokenId); } else { revert ERC721InsufficientApproval(spender, tokenId); } } } /** * @dev Unsafe write access to the balances, used by extensions that "mint" tokens using an {ownerOf} override. * * NOTE: the value is limited to type(uint128).max. This protect against _balance overflow. It is unrealistic that * a uint256 would ever overflow from increments when these increments are bounded to uint128 values. * * WARNING: Increasing an account's balance using this function tends to be paired with an override of the * {_ownerOf} function to resolve the ownership of the corresponding tokens so that balances and ownership * remain consistent with one another. */ function _increaseBalance(address account, uint128 value) internal virtual { ERC721Storage storage $ = _getERC721Storage(); unchecked { $._balances[account] += value; } } /** * @dev Transfers `tokenId` from its current owner to `to`, or alternatively mints (or burns) if the current owner * (or `to`) is the zero address. Returns the owner of the `tokenId` before the update. * * The `auth` argument is optional. If the value passed is non 0, then this function will check that * `auth` is either the owner of the token, or approved to operate on the token (by the owner). * * Emits a {Transfer} event. * * NOTE: If overriding this function in a way that tracks balances, see also {_increaseBalance}. */ function _update(address to, uint256 tokenId, address auth) internal virtual returns (address) { ERC721Storage storage $ = _getERC721Storage(); address from = _ownerOf(tokenId); // Perform (optional) operator check if (auth != address(0)) { _checkAuthorized(from, auth, tokenId); } // Execute the update if (from != address(0)) { // Clear approval. No need to re-authorize or emit the Approval event _approve(address(0), tokenId, address(0), false); unchecked { $._balances[from] -= 1; } } if (to != address(0)) { unchecked { $._balances[to] += 1; } } $._owners[tokenId] = to; emit Transfer(from, to, tokenId); return from; } /** * @dev Mints `tokenId` and transfers it to `to`. * * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible * * Requirements: * * - `tokenId` must not exist. * - `to` cannot be the zero address. * * Emits a {Transfer} event. */ function _mint(address to, uint256 tokenId) internal { if (to == address(0)) { revert ERC721InvalidReceiver(address(0)); } address previousOwner = _update(to, tokenId, address(0)); if (previousOwner != address(0)) { revert ERC721InvalidSender(address(0)); } } /** * @dev Mints `tokenId`, transfers it to `to` and checks for `to` acceptance. * * Requirements: * * - `tokenId` must not exist. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeMint(address to, uint256 tokenId) internal { _safeMint(to, tokenId, ""); } /** * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is * forwarded in {IERC721Receiver-onERC721Received} to contract recipients. */ function _safeMint(address to, uint256 tokenId, bytes memory data) internal virtual { _mint(to, tokenId); _checkOnERC721Received(address(0), to, tokenId, data); } /** * @dev Destroys `tokenId`. * The approval is cleared when the token is burned. * This is an internal function that does not check if the sender is authorized to operate on the token. * * Requirements: * * - `tokenId` must exist. * * Emits a {Transfer} event. */ function _burn(uint256 tokenId) internal { address previousOwner = _update(address(0), tokenId, address(0)); if (previousOwner == address(0)) { revert ERC721NonexistentToken(tokenId); } } /** * @dev Transfers `tokenId` from `from` to `to`. * As opposed to {transferFrom}, this imposes no restrictions on msg.sender. * * Requirements: * * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * * Emits a {Transfer} event. */ function _transfer(address from, address to, uint256 tokenId) internal { if (to == address(0)) { revert ERC721InvalidReceiver(address(0)); } address previousOwner = _update(to, tokenId, address(0)); if (previousOwner == address(0)) { revert ERC721NonexistentToken(tokenId); } else if (previousOwner != from) { revert ERC721IncorrectOwner(from, tokenId, previousOwner); } } /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking that contract recipients * are aware of the ERC721 standard to prevent tokens from being forever locked. * * `data` is additional data, it has no specified format and it is sent in call to `to`. * * This internal function is like {safeTransferFrom} in the sense that it invokes * {IERC721Receiver-onERC721Received} on the receiver, and can be used to e.g. * implement alternative mechanisms to perform token transfer, such as signature-based. * * Requirements: * * - `tokenId` token must exist and be owned by `from`. * - `to` cannot be the zero address. * - `from` cannot be the zero address. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeTransfer(address from, address to, uint256 tokenId) internal { _safeTransfer(from, to, tokenId, ""); } /** * @dev Same as {xref-ERC721-_safeTransfer-address-address-uint256-}[`_safeTransfer`], with an additional `data` parameter which is * forwarded in {IERC721Receiver-onERC721Received} to contract recipients. */ function _safeTransfer(address from, address to, uint256 tokenId, bytes memory data) internal virtual { _transfer(from, to, tokenId); _checkOnERC721Received(from, to, tokenId, data); } /** * @dev Approve `to` to operate on `tokenId` * * The `auth` argument is optional. If the value passed is non 0, then this function will check that `auth` is * either the owner of the token, or approved to operate on all tokens held by this owner. * * Emits an {Approval} event. * * Overrides to this logic should be done to the variant with an additional `bool emitEvent` argument. */ function _approve(address to, uint256 tokenId, address auth) internal { _approve(to, tokenId, auth, true); } /** * @dev Variant of `_approve` with an optional flag to enable or disable the {Approval} event. The event is not * emitted in the context of transfers. */ function _approve(address to, uint256 tokenId, address auth, bool emitEvent) internal virtual { ERC721Storage storage $ = _getERC721Storage(); // Avoid reading the owner unless necessary if (emitEvent || auth != address(0)) { address owner = _requireOwned(tokenId); // We do not use _isAuthorized because single-token approvals should not be able to call approve if (auth != address(0) && owner != auth && !isApprovedForAll(owner, auth)) { revert ERC721InvalidApprover(auth); } if (emitEvent) { emit Approval(owner, to, tokenId); } } $._tokenApprovals[tokenId] = to; } /** * @dev Approve `operator` to operate on all of `owner` tokens * * Requirements: * - operator can't be the address zero. * * Emits an {ApprovalForAll} event. */ function _setApprovalForAll(address owner, address operator, bool approved) internal virtual { ERC721Storage storage $ = _getERC721Storage(); if (operator == address(0)) { revert ERC721InvalidOperator(operator); } $._operatorApprovals[owner][operator] = approved; emit ApprovalForAll(owner, operator, approved); } /** * @dev Reverts if the `tokenId` doesn't have a current owner (it hasn't been minted, or it has been burned). * Returns the owner. * * Overrides to ownership logic should be done to {_ownerOf}. */ function _requireOwned(uint256 tokenId) internal view returns (address) { address owner = _ownerOf(tokenId); if (owner == address(0)) { revert ERC721NonexistentToken(tokenId); } return owner; } /** * @dev Private function to invoke {IERC721Receiver-onERC721Received} on a target address. This will revert if the * recipient doesn't accept the token transfer. The call is not executed if the target address is not a contract. * * @param from address representing the previous owner of the given token ID * @param to target address that will receive the tokens * @param tokenId uint256 ID of the token to be transferred * @param data bytes optional data to send along with the call */ function _checkOnERC721Received(address from, address to, uint256 tokenId, bytes memory data) private { if (to.code.length > 0) { try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, data) returns (bytes4 retval) { if (retval != IERC721Receiver.onERC721Received.selector) { revert ERC721InvalidReceiver(to); } } catch (bytes memory reason) { if (reason.length == 0) { revert ERC721InvalidReceiver(to); } else { /// @solidity memory-safe-assembly assembly { revert(add(32, reason), mload(reason)) } } } } }}

File 6 of 43 : ERC721BurnableUpgradeable.sol

// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC721/extensions/ERC721Burnable.sol)pragma solidity ^0.8.20;import {ERC721Upgradeable} from "../ERC721Upgradeable.sol";import {ContextUpgradeable} from "../../../utils/ContextUpgradeable.sol";import {Initializable} from "../../../proxy/utils/Initializable.sol";/** * @title ERC721 Burnable Token * @dev ERC721 Token that can be burned (destroyed). */abstract contract ERC721BurnableUpgradeable is Initializable, ContextUpgradeable, ERC721Upgradeable { function __ERC721Burnable_init() internal onlyInitializing { } function __ERC721Burnable_init_unchained() internal onlyInitializing { } /** * @dev Burns `tokenId`. See {ERC721-_burn}. * * Requirements: * * - The caller must own `tokenId` or be an approved operator. */ function burn(uint256 tokenId) public virtual { // Setting an "auth" arguments enables the `_isAuthorized` check which verifies that the token exists // (from != 0). Therefore, it is not needed to verify that the return value is not 0 here. _update(address(0), tokenId, _msgSender()); }}

File 7 of 43 : ContextUpgradeable.sol

// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)pragma solidity ^0.8.20;import {Initializable} from "../proxy/utils/Initializable.sol";/** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */abstract contract ContextUpgradeable is Initializable { function __Context_init() internal onlyInitializing { } function __Context_init_unchained() internal onlyInitializing { } function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } function _contextSuffixLength() internal view virtual returns (uint256) { return 0; }}

File 8 of 43 : ERC165Upgradeable.sol

// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v5.0.0) (utils/introspection/ERC165.sol)pragma solidity ^0.8.20;import {IERC165} from "@openzeppelin/contracts/utils/introspection/IERC165.sol";import {Initializable} from "../../proxy/utils/Initializable.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); * } * ``` */abstract contract ERC165Upgradeable is Initializable, IERC165 { function __ERC165_init() internal onlyInitializing { } function __ERC165_init_unchained() internal onlyInitializing { } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual returns (bool) { return interfaceId == type(IERC165).interfaceId; }}

File 9 of 43 : IAccessControl.sol

// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v5.0.0) (access/IAccessControl.sol)pragma solidity ^0.8.20;/** * @dev External interface of AccessControl declared to support ERC165 detection. */interface IAccessControl { /** * @dev The `account` is missing a role. */ error AccessControlUnauthorizedAccount(address account, bytes32 neededRole); /** * @dev The caller of a function is not the expected one. * * NOTE: Don't confuse with {AccessControlUnauthorizedAccount}. */ error AccessControlBadConfirmation(); /** * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole` * * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite * {RoleAdminChanged} not being emitted signaling this. */ event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole); /** * @dev Emitted when `account` is granted `role`. * * `sender` is the account that originated the contract call, an admin role * bearer except when using {AccessControl-_setupRole}. */ event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Emitted when `account` is revoked `role`. * * `sender` is the account that originated the contract call: * - if using `revokeRole`, it is the admin role bearer * - if using `renounceRole`, it is the role bearer (i.e. `account`) */ event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) external view returns (bool); /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {AccessControl-_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) external view returns (bytes32); /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) external; /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) external; /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been granted `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `callerConfirmation`. */ function renounceRole(bytes32 role, address callerConfirmation) external;}

File 10 of 43 : draft-IERC6093.sol

// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/draft-IERC6093.sol)pragma solidity ^0.8.20;/** * @dev Standard ERC20 Errors * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC20 tokens. */interface IERC20Errors { /** * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. * @param balance Current balance for the interacting account. * @param needed Minimum amount required to perform a transfer. */ error ERC20InsufficientBalance(address sender, uint256 balance, uint256 needed); /** * @dev Indicates a failure with the token `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. */ error ERC20InvalidSender(address sender); /** * @dev Indicates a failure with the token `receiver`. Used in transfers. * @param receiver Address to which tokens are being transferred. */ error ERC20InvalidReceiver(address receiver); /** * @dev Indicates a failure with the `spender`’s `allowance`. Used in transfers. * @param spender Address that may be allowed to operate on tokens without being their owner. * @param allowance Amount of tokens a `spender` is allowed to operate with. * @param needed Minimum amount required to perform a transfer. */ error ERC20InsufficientAllowance(address spender, uint256 allowance, uint256 needed); /** * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals. * @param approver Address initiating an approval operation. */ error ERC20InvalidApprover(address approver); /** * @dev Indicates a failure with the `spender` to be approved. Used in approvals. * @param spender Address that may be allowed to operate on tokens without being their owner. */ error ERC20InvalidSpender(address spender);}/** * @dev Standard ERC721 Errors * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC721 tokens. */interface IERC721Errors { /** * @dev Indicates that an address can't be an owner. For example, `address(0)` is a forbidden owner in EIP-20. * Used in balance queries. * @param owner Address of the current owner of a token. */ error ERC721InvalidOwner(address owner); /** * @dev Indicates a `tokenId` whose `owner` is the zero address. * @param tokenId Identifier number of a token. */ error ERC721NonexistentToken(uint256 tokenId); /** * @dev Indicates an error related to the ownership over a particular token. Used in transfers. * @param sender Address whose tokens are being transferred. * @param tokenId Identifier number of a token. * @param owner Address of the current owner of a token. */ error ERC721IncorrectOwner(address sender, uint256 tokenId, address owner); /** * @dev Indicates a failure with the token `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. */ error ERC721InvalidSender(address sender); /** * @dev Indicates a failure with the token `receiver`. Used in transfers. * @param receiver Address to which tokens are being transferred. */ error ERC721InvalidReceiver(address receiver); /** * @dev Indicates a failure with the `operator`’s approval. Used in transfers. * @param operator Address that may be allowed to operate on tokens without being their owner. * @param tokenId Identifier number of a token. */ error ERC721InsufficientApproval(address operator, uint256 tokenId); /** * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals. * @param approver Address initiating an approval operation. */ error ERC721InvalidApprover(address approver); /** * @dev Indicates a failure with the `operator` to be approved. Used in approvals. * @param operator Address that may be allowed to operate on tokens without being their owner. */ error ERC721InvalidOperator(address operator);}/** * @dev Standard ERC1155 Errors * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC1155 tokens. */interface IERC1155Errors { /** * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. * @param balance Current balance for the interacting account. * @param needed Minimum amount required to perform a transfer. * @param tokenId Identifier number of a token. */ error ERC1155InsufficientBalance(address sender, uint256 balance, uint256 needed, uint256 tokenId); /** * @dev Indicates a failure with the token `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. */ error ERC1155InvalidSender(address sender); /** * @dev Indicates a failure with the token `receiver`. Used in transfers. * @param receiver Address to which tokens are being transferred. */ error ERC1155InvalidReceiver(address receiver); /** * @dev Indicates a failure with the `operator`’s approval. Used in transfers. * @param operator Address that may be allowed to operate on tokens without being their owner. * @param owner Address of the current owner of a token. */ error ERC1155MissingApprovalForAll(address operator, address owner); /** * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals. * @param approver Address initiating an approval operation. */ error ERC1155InvalidApprover(address approver); /** * @dev Indicates a failure with the `operator` to be approved. Used in approvals. * @param operator Address that may be allowed to operate on tokens without being their owner. */ error ERC1155InvalidOperator(address operator); /** * @dev Indicates an array length mismatch between ids and values in a safeBatchTransferFrom operation. * Used in batch transfers. * @param idsLength Length of the array of token identifiers * @param valuesLength Length of the array of token amounts */ error ERC1155InvalidArrayLength(uint256 idsLength, uint256 valuesLength);}

File 11 of 43 : IERC721Metadata.sol

// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC721/extensions/IERC721Metadata.sol)pragma solidity ^0.8.20;import {IERC721} from "../IERC721.sol";/** * @title ERC-721 Non-Fungible Token Standard, optional metadata extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */interface IERC721Metadata is IERC721 { /** * @dev Returns the token collection name. */ function name() external view returns (string memory); /** * @dev Returns the token collection symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token. */ function tokenURI(uint256 tokenId) external view returns (string memory);}

File 12 of 43 : IERC721.sol

// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC721/IERC721.sol)pragma solidity ^0.8.20;import {IERC165} from "../../utils/introspection/IERC165.sol";/** * @dev Required interface of an ERC721 compliant contract. */interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon * a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external; /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must have been allowed to move this token by either {approve} or * {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon * a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom(address from, address to, uint256 tokenId) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721 * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must * understand this adds an external call which potentially creates a reentrancy vulnerability. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom(address from, address to, uint256 tokenId) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the address zero. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool approved) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool);}

File 13 of 43 : IERC721Receiver.sol

// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC721/IERC721Receiver.sol)pragma solidity ^0.8.20;/** * @title ERC721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC721 asset contracts. */interface IERC721Receiver { /** * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} * by `operator` from `from`, this function is called. * * It must return its Solidity selector to confirm the token transfer. * If any other value is returned or the interface is not implemented by the recipient, the transfer will be * reverted. * * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`. */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4);}

File 14 of 43 : IERC165.sol

// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v5.0.0) (utils/introspection/IERC165.sol)pragma solidity ^0.8.20;/** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool);}

File 15 of 43 : Math.sol

// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v5.0.0) (utils/math/Math.sol)pragma solidity ^0.8.20;/** * @dev Standard math utilities missing in the Solidity language. */library Math { /** * @dev Muldiv operation overflow. */ error MathOverflowedMulDiv(); enum Rounding { Floor, // Toward negative infinity Ceil, // Toward positive infinity Trunc, // Toward zero Expand // Away from zero } /** * @dev Returns the addition of two unsigned integers, with an overflow flag. */ function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { uint256 c = a + b; if (c < a) return (false, 0); return (true, c); } } /** * @dev Returns the subtraction of two unsigned integers, with an overflow flag. */ function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b > a) return (false, 0); return (true, a - b); } } /** * @dev Returns the multiplication of two unsigned integers, with an overflow flag. */ function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) return (true, 0); uint256 c = a * b; if (c / a != b) return (false, 0); return (true, c); } } /** * @dev Returns the division of two unsigned integers, with a division by zero flag. */ function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a / b); } } /** * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag. */ function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a % b); } } /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a > b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow. return (a & b) + (a ^ b) / 2; } /** * @dev Returns the ceiling of the division of two numbers. * * This differs from standard division with `/` in that it rounds towards infinity instead * of rounding towards zero. */ function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) { if (b == 0) { // Guarantee the same behavior as in a regular Solidity division. return a / b; } // (a + b - 1) / b can overflow on addition, so we distribute. return a == 0 ? 0 : (a - 1) / b + 1; } /** * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or * denominator == 0. * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) with further edits by * Uniswap Labs also under MIT license. */ function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) { unchecked { // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256 // variables such that product = prod1 * 2^256 + prod0. uint256 prod0 = x * y; // Least significant 256 bits of the product uint256 prod1; // Most significant 256 bits of the product assembly { let mm := mulmod(x, y, not(0)) prod1 := sub(sub(mm, prod0), lt(mm, prod0)) } // Handle non-overflow cases, 256 by 256 division. if (prod1 == 0) { // Solidity will revert if denominator == 0, unlike the div opcode on its own. // The surrounding unchecked block does not change this fact. // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic. return prod0 / denominator; } // Make sure the result is less than 2^256. Also prevents denominator == 0. if (denominator <= prod1) { revert MathOverflowedMulDiv(); } /////////////////////////////////////////////// // 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. uint256 twos = denominator & (0 - denominator); assembly { // Divide denominator by twos. denominator := div(denominator, twos) // Divide [prod1 prod0] by twos. prod0 := div(prod0, twos) // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one. twos := add(div(sub(0, twos), twos), 1) } // Shift in bits from prod1 into prod0. prod0 |= prod1 * twos; // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for // four bits. That is, denominator * inv = 1 mod 2^4. uint256 inverse = (3 * denominator) ^ 2; // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also // works in modular arithmetic, doubling the correct bits in each step. inverse *= 2 - denominator * inverse; // inverse mod 2^8 inverse *= 2 - denominator * inverse; // inverse mod 2^16 inverse *= 2 - denominator * inverse; // inverse mod 2^32 inverse *= 2 - denominator * inverse; // inverse mod 2^64 inverse *= 2 - denominator * inverse; // inverse mod 2^128 inverse *= 2 - denominator * inverse; // inverse mod 2^256 // Because the division is now exact we can divide by multiplying with the modular inverse of denominator. // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1 // is no longer required. result = prod0 * inverse; return result; } } /** * @notice Calculates x * y / denominator with full precision, following the selected rounding direction. */ function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) { uint256 result = mulDiv(x, y, denominator); if (unsignedRoundsUp(rounding) && 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 * towards zero. * * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11). */ function sqrt(uint256 a) internal pure returns (uint256) { if (a == 0) { return 0; } // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target. // // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`. // // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)` // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))` // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)` // // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit. uint256 result = 1 << (log2(a) >> 1); // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128, // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision // into the expected uint128 result. unchecked { result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; return min(result, a / result); } } /** * @notice Calculates sqrt(a), following the selected rounding direction. */ function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = sqrt(a); return result + (unsignedRoundsUp(rounding) && result * result < a ? 1 : 0); } } /** * @dev Return the log in base 2 of a positive value rounded towards zero. * Returns 0 if given 0. */ function log2(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 128; } if (value >> 64 > 0) { value >>= 64; result += 64; } if (value >> 32 > 0) { value >>= 32; result += 32; } if (value >> 16 > 0) { value >>= 16; result += 16; } if (value >> 8 > 0) { value >>= 8; result += 8; } if (value >> 4 > 0) { value >>= 4; result += 4; } if (value >> 2 > 0) { value >>= 2; result += 2; } if (value >> 1 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 2, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log2(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log2(value); return result + (unsignedRoundsUp(rounding) && 1 << result < value ? 1 : 0); } } /** * @dev Return the log in base 10 of a positive value rounded towards zero. * Returns 0 if given 0. */ function log10(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >= 10 ** 64) { value /= 10 ** 64; result += 64; } if (value >= 10 ** 32) { value /= 10 ** 32; result += 32; } if (value >= 10 ** 16) { value /= 10 ** 16; result += 16; } if (value >= 10 ** 8) { value /= 10 ** 8; result += 8; } if (value >= 10 ** 4) { value /= 10 ** 4; result += 4; } if (value >= 10 ** 2) { value /= 10 ** 2; result += 2; } if (value >= 10 ** 1) { result += 1; } } return result; } /** * @dev Return the log in base 10, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log10(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log10(value); return result + (unsignedRoundsUp(rounding) && 10 ** result < value ? 1 : 0); } } /** * @dev Return the log in base 256 of a positive value rounded towards zero. * Returns 0 if given 0. * * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string. */ function log256(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 16; } if (value >> 64 > 0) { value >>= 64; result += 8; } if (value >> 32 > 0) { value >>= 32; result += 4; } if (value >> 16 > 0) { value >>= 16; result += 2; } if (value >> 8 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 256, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log256(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log256(value); return result + (unsignedRoundsUp(rounding) && 1 << (result << 3) < value ? 1 : 0); } } /** * @dev Returns whether a provided rounding mode is considered rounding up for unsigned integers. */ function unsignedRoundsUp(Rounding rounding) internal pure returns (bool) { return uint8(rounding) % 2 == 1; }}

File 16 of 43 : SignedMath.sol

// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v5.0.0) (utils/math/SignedMath.sol)pragma solidity ^0.8.20;/** * @dev Standard signed math utilities missing in the Solidity language. */library SignedMath { /** * @dev Returns the largest of two signed numbers. */ function max(int256 a, int256 b) internal pure returns (int256) { return a > b ? a : b; } /** * @dev Returns the smallest of two signed numbers. */ function min(int256 a, int256 b) internal pure returns (int256) { return a < b ? a : b; } /** * @dev Returns the average of two signed numbers without overflow. * The result is rounded towards zero. */ function average(int256 a, int256 b) internal pure returns (int256) { // Formula from the book "Hacker's Delight" int256 x = (a & b) + ((a ^ b) >> 1); return x + (int256(uint256(x) >> 255) & (a ^ b)); } /** * @dev Returns the absolute unsigned value of a signed value. */ function abs(int256 n) internal pure returns (uint256) { unchecked { // must be unchecked in order to support `n = type(int256).min` return uint256(n >= 0 ? n : -n); } }}

File 17 of 43 : ShortStrings.sol

// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v5.0.0) (utils/ShortStrings.sol)pragma solidity ^0.8.20;import {StorageSlot} from "./StorageSlot.sol";// | string | 0xAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA |// | length | 0x BB |type ShortString is bytes32;/** * @dev This library provides functions to convert short memory strings * into a `ShortString` type that can be used as an immutable variable. * * Strings of arbitrary length can be optimized using this library if * they are short enough (up to 31 bytes) by packing them with their * length (1 byte) in a single EVM word (32 bytes). Additionally, a * fallback mechanism can be used for every other case. * * Usage example: * * ```solidity * contract Named { * using ShortStrings for *; * * ShortString private immutable _name; * string private _nameFallback; * * constructor(string memory contractName) { * _name = contractName.toShortStringWithFallback(_nameFallback); * } * * function name() external view returns (string memory) { * return _name.toStringWithFallback(_nameFallback); * } * } * ``` */library ShortStrings { // Used as an identifier for strings longer than 31 bytes. bytes32 private constant FALLBACK_SENTINEL = 0x00000000000000000000000000000000000000000000000000000000000000FF; error StringTooLong(string str); error InvalidShortString(); /** * @dev Encode a string of at most 31 chars into a `ShortString`. * * This will trigger a `StringTooLong` error is the input string is too long. */ function toShortString(string memory str) internal pure returns (ShortString) { bytes memory bstr = bytes(str); if (bstr.length > 31) { revert StringTooLong(str); } return ShortString.wrap(bytes32(uint256(bytes32(bstr)) | bstr.length)); } /** * @dev Decode a `ShortString` back to a "normal" string. */ function toString(ShortString sstr) internal pure returns (string memory) { uint256 len = byteLength(sstr); // using `new string(len)` would work locally but is not memory safe. string memory str = new string(32); /// @solidity memory-safe-assembly assembly { mstore(str, len) mstore(add(str, 0x20), sstr) } return str; } /** * @dev Return the length of a `ShortString`. */ function byteLength(ShortString sstr) internal pure returns (uint256) { uint256 result = uint256(ShortString.unwrap(sstr)) & 0xFF; if (result > 31) { revert InvalidShortString(); } return result; } /** * @dev Encode a string into a `ShortString`, or write it to storage if it is too long. */ function toShortStringWithFallback(string memory value, string storage store) internal returns (ShortString) { if (bytes(value).length < 32) { return toShortString(value); } else { StorageSlot.getStringSlot(store).value = value; return ShortString.wrap(FALLBACK_SENTINEL); } } /** * @dev Decode a string that was encoded to `ShortString` or written to storage using {setWithFallback}. */ function toStringWithFallback(ShortString value, string storage store) internal pure returns (string memory) { if (ShortString.unwrap(value) != FALLBACK_SENTINEL) { return toString(value); } else { return store; } } /** * @dev Return the length of a string that was encoded to `ShortString` or written to storage using * {setWithFallback}. * * WARNING: This will return the "byte length" of the string. This may not reflect the actual length in terms of * actual characters as the UTF-8 encoding of a single character can span over multiple bytes. */ function byteLengthWithFallback(ShortString value, string storage store) internal view returns (uint256) { if (ShortString.unwrap(value) != FALLBACK_SENTINEL) { return byteLength(value); } else { return bytes(store).length; } }}

File 18 of 43 : StorageSlot.sol

// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v5.0.0) (utils/StorageSlot.sol)// This file was procedurally generated from scripts/generate/templates/StorageSlot.js.pragma solidity ^0.8.20;/** * @dev Library for reading and writing primitive types to specific storage slots. * * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts. * This library helps with reading and writing to such slots without the need for inline assembly. * * The functions in this library return Slot structs that contain a `value` member that can be used to read or write. * * Example usage to set ERC1967 implementation slot: * ```solidity * contract ERC1967 { * bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc; * * function _getImplementation() internal view returns (address) { * return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value; * } * * function _setImplementation(address newImplementation) internal { * require(newImplementation.code.length > 0); * StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation; * } * } * ``` */library StorageSlot { struct AddressSlot { address value; } struct BooleanSlot { bool value; } struct Bytes32Slot { bytes32 value; } struct Uint256Slot { uint256 value; } struct StringSlot { string value; } struct BytesSlot { bytes value; } /** * @dev Returns an `AddressSlot` with member `value` located at `slot`. */ function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `BooleanSlot` with member `value` located at `slot`. */ function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `Bytes32Slot` with member `value` located at `slot`. */ function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `Uint256Slot` with member `value` located at `slot`. */ function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `StringSlot` with member `value` located at `slot`. */ function getStringSlot(bytes32 slot) internal pure returns (StringSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `StringSlot` representation of the string storage pointer `store`. */ function getStringSlot(string storage store) internal pure returns (StringSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := store.slot } } /** * @dev Returns an `BytesSlot` with member `value` located at `slot`. */ function getBytesSlot(bytes32 slot) internal pure returns (BytesSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `BytesSlot` representation of the bytes storage pointer `store`. */ function getBytesSlot(bytes storage store) internal pure returns (BytesSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := store.slot } }}

File 19 of 43 : Strings.sol

// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v5.0.0) (utils/Strings.sol)pragma solidity ^0.8.20;import {Math} from "./math/Math.sol";import {SignedMath} from "./math/SignedMath.sol";/** * @dev String operations. */library Strings { bytes16 private constant HEX_DIGITS = "0123456789abcdef"; uint8 private constant ADDRESS_LENGTH = 20; /** * @dev The `value` string doesn't fit in the specified `length`. */ error StringsInsufficientHexLength(uint256 value, uint256 length); /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { unchecked { uint256 length = Math.log10(value) + 1; string memory buffer = new string(length); uint256 ptr; /// @solidity memory-safe-assembly assembly { ptr := add(buffer, add(32, length)) } while (true) { ptr--; /// @solidity memory-safe-assembly assembly { mstore8(ptr, byte(mod(value, 10), HEX_DIGITS)) } value /= 10; if (value == 0) break; } return buffer; } } /** * @dev Converts a `int256` to its ASCII `string` decimal representation. */ function toStringSigned(int256 value) internal pure returns (string memory) { return string.concat(value < 0 ? "-" : "", toString(SignedMath.abs(value))); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { unchecked { return toHexString(value, Math.log256(value) + 1); } } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { uint256 localValue = value; bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = HEX_DIGITS[localValue & 0xf]; localValue >>= 4; } if (localValue != 0) { revert StringsInsufficientHexLength(value, length); } return string(buffer); } /** * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal * representation. */ function toHexString(address addr) internal pure returns (string memory) { return toHexString(uint256(uint160(addr)), ADDRESS_LENGTH); } /** * @dev Returns true if the two strings are equal. */ function equal(string memory a, string memory b) internal pure returns (bool) { return bytes(a).length == bytes(b).length && keccak256(bytes(a)) == keccak256(bytes(b)); }}

File 20 of 43 : NFTLimitedEditionCollection.sol

// SPDX-License-Identifier: MIT OR Apache-2.0pragma solidity ^0.8.18;// solhint-disable max-line-lengthimport { IERC165 } from "@openzeppelin/contracts/utils/introspection/IERC165.sol";import { IERC721Metadata } from "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol";import { INFTLimitedEditionCollectionInitializer } from "../interfaces/internal/collections/INFTLimitedEditionCollectionInitializer.sol";import { AccessControlUpgradeable } from "@openzeppelin/contracts-upgradeable-v5/access/AccessControlUpgradeable.sol";import { ERC721BurnableUpgradeable } from "@openzeppelin/contracts-upgradeable-v5/token/ERC721/extensions/ERC721BurnableUpgradeable.sol";import { ERC721Upgradeable } from "@openzeppelin/contracts-upgradeable-v5/token/ERC721/ERC721Upgradeable.sol";import { Initializable } from "@openzeppelin/contracts-upgradeable-v5/proxy/utils/Initializable.sol";import { Ownable2StepUpgradeable } from "@openzeppelin/contracts-upgradeable-v5/access/Ownable2StepUpgradeable.sol";import { Strings } from "@openzeppelin/contracts/utils/Strings.sol";import "../mixins/shared/Constants.sol";import { AdminRole } from "../mixins/roles/AdminRole.sol";import { CollectionRoyalties } from "../mixins/collections/CollectionRoyalties.sol";import { LazyMintedCollection } from "../mixins/collections/LazyMintedCollection.sol";import { MinterRole } from "../mixins/roles/MinterRole.sol";import { NFTCollectionType } from "../mixins/collections/NFTCollectionType.sol";import { NFTMetadataUpdate } from "../mixins/collections/NFTMetadataUpdate.sol";import { SequentialMintCollection } from "../mixins/collections/SequentialMintCollection.sol";import { SharedPaymentCollection } from "../mixins/collections/SharedPaymentCollection.sol";import { SharedURICollection } from "../mixins/collections/SharedURICollection.sol";import { SupplyLock } from "../mixins/collections/SupplyLock.sol";import { TokenLimitedCollection } from "../mixins/collections/TokenLimitedCollection.sol";// solhint-enable max-line-lengtherror NFTLimitedEditionCollection_Exceeds_Max_Token_Id(uint256 maxTokenId);/** * @title A contract to batch mint a collection of edition NFTs. * @notice A 10% royalty to the creator is included which may be split with collaborators. * @author gosseti */contract NFTLimitedEditionCollection is INFTLimitedEditionCollectionInitializer, Initializable, Ownable2StepUpgradeable, AdminRole, MinterRole, ERC721Upgradeable, ERC721BurnableUpgradeable, NFTCollectionType, NFTMetadataUpdate, SequentialMintCollection, TokenLimitedCollection, CollectionRoyalties, LazyMintedCollection, SharedURICollection, SharedPaymentCollection, SupplyLock{ using Strings for uint256; /// @notice Initialize the template's immutable variables. constructor() NFTCollectionType(NFT_LIMITED_EDITION_COLLECTION_TYPE) reinitializer(type(uint64).max) { __ERC721_init_unchained("NFT Limited Edition Collection Implementation", "NFTLimitedEdition"); // Using reinitializer instead of _disableInitializers allows initializing of OZ mixins, describing the template. } /** * @notice Called by the contract factory on creation. * @param _creator The creator of this collection. * This account is the default admin for this collection. * @param _name The collection's `name`. * @param _symbol The collection's `symbol`. * @param tokenURI_ The token URI for the collection. * @param _maxTokenId The max token id for this collection. * @param _approvedMinter An optional address to grant the MINTER_ROLE. * Set to address(0) if only admins should be granted permission to mint. * @param _paymentAddress The address that will receive royalties and mint payments. */ function initialize( address payable _creator, string calldata _name, string calldata _symbol, string calldata tokenURI_, uint32 _maxTokenId, address _approvedMinter, address payable _paymentAddress ) external initializer { // Initialize the mixins __ERC721_init_unchained(_name, _symbol); __Ownable_init_unchained(_creator); _initializeTokenLimitedCollection(_maxTokenId); /** * Given this is not exposed to the caller we are okay re-using *baseURI here */ _setBaseURI(tokenURI_); _initializeLazyMintedCollection(_creator, _approvedMinter); _initializeSharedPaymentCollection(_paymentAddress); } /** * @inheritdoc LazyMintedCollection */ function mintCountTo(uint16 count, address to) public override returns (uint256 firstTokenId) { // If the mint will exceed uint32, the addition here will overflow. But it's not realistic to mint that many tokens. if (latestTokenId + count > maxTokenId) { revert NFTLimitedEditionCollection_Exceeds_Max_Token_Id(maxTokenId); } firstTokenId = super.mintCountTo(count, to); } /** * @notice Allows the owner to set a max tokenID. * This provides a guarantee to collectors about the limit of this collection contract. * @param _maxTokenId The max tokenId to set, all NFTs must have a tokenId less than or equal to this value. * @dev Once this value has been set, it may be decreased but can never be increased. * This max may be more than the final `totalSupply` if 1 or more tokens were burned. * It may not be called if a supply lock has been requested, until that time period has expired. */ function updateMaxTokenId(uint32 _maxTokenId) external onlyAdmin notDuringSupplyLock { _updateMaxTokenId(_maxTokenId); } /** * @inheritdoc ERC721Upgradeable */ function _update( address to, uint256 tokenId, address auth ) internal override(ERC721Upgradeable, SequentialMintCollection, LazyMintedCollection) returns (address from) { from = super._update(to, tokenId, auth); } /** * @notice Get the number of tokens which can still be minted. * @return count The max number of additional NFTs that can be minted by this collection. */ function numberOfTokensAvailableToMint() external view returns (uint256 count) { // Mint ensures that latestTokenId is always <= maxTokenId unchecked { count = maxTokenId - latestTokenId; } } /// @inheritdoc IERC165 function supportsInterface( bytes4 interfaceId ) public view override(NFTMetadataUpdate, ERC721Upgradeable, AccessControlUpgradeable, LazyMintedCollection, CollectionRoyalties) returns (bool isSupported) { isSupported = super.supportsInterface(interfaceId); } /// @inheritdoc IERC721Metadata function tokenURI(uint256 /*tokenId*/) public view override returns (string memory uri) { uri = _baseURI(); } /** * @inheritdoc ERC721Upgradeable */ function _baseURI() internal view override(ERC721Upgradeable, SharedURICollection) returns (string memory uri) { uri = super._baseURI(); } /** * @inheritdoc MinterRole */ function _requirePermissionToMint() internal view override(MinterRole, SupplyLock) { super._requirePermissionToMint(); } function totalSupply() public view override(LazyMintedCollection, SequentialMintCollection) returns (uint256 supply) { supply = super.totalSupply(); } function getTokenCreatorPaymentAddress( uint256 tokenId ) public view override(CollectionRoyalties, SharedPaymentCollection) returns (address payable creatorPaymentAddress) { creatorPaymentAddress = super.getTokenCreatorPaymentAddress(tokenId); }}

File 21 of 43 : INFTLimitedEditionCollectionInitializer.sol

// SPDX-License-Identifier: MIT OR Apache-2.0pragma solidity ^0.8.18;/** * @title Declares the interface for initializing an NFTLimitedEditionCollection contract. * @author gosseti */interface INFTLimitedEditionCollectionInitializer { function initialize( address payable _creator, string calldata _name, string calldata _symbol, string calldata _tokenURI, uint32 _maxTokenId, address _approvedMinter, address payable _paymentAddress ) external;}

File 22 of 43 : INFTCollectionType.sol

// SPDX-License-Identifier: MIT OR Apache-2.0pragma solidity ^0.8.18;/** * @title Declares the type of the collection contract. * @dev This interface is declared as an ERC-165 interface. * @author reggieag */interface INFTCollectionType { function getNFTCollectionType() external view returns (string memory collectionType);}

File 23 of 43 : INFTLazyMintedCollectionMintCountTo.sol

// SPDX-License-Identifier: MIT OR Apache-2.0pragma solidity ^0.8.18;/** * @title The required interface for collections to support minting from the NFTDropMarket. * @dev This interface must be registered as a ERC165 supported interface. * @author batu-inal & HardlyDifficult */interface INFTLazyMintedCollectionMintCountTo { function mintCountTo(uint16 count, address to) external returns (uint256 firstTokenId); /** * @notice Get the number of tokens which can still be minted. * @return count The max number of additional NFTs that can be minted by this collection. */ function numberOfTokensAvailableToMint() external view returns (uint256 count);}

File 24 of 43 : INFTSupplyLock.sol

// SPDX-License-Identifier: MIT OR Apache-2.0pragma solidity ^0.8.18;/** * @title Allows an approved minter to lock down supply changes for a limited period of time. * @dev This is used to help ensure minting access and token supply are not manipulated during an active minting period. * @author HardlyDifficult */interface INFTSupplyLock { /** * @notice Request a supply lock for a limited period of time. * @param expiration The date/time when the lock expires, in seconds since the Unix epoch. * @dev The caller must already be an approved minter. * If a lock has already been requested, it may be cleared by the lock holder by passing 0 for the expiration. */ function minterAcquireSupplyLock(uint256 expiration) external; /** * @notice Get the current supply lock holder and expiration, if applicable. * @return supplyLockHolder The address of with lock access, or the zero address if supply is not locked. * @return supplyLockExpiration The date/time when the lock expires, in seconds since the Unix epoch. Returns 0 if a * lock has not been requested or if it has already expired. */ function getSupplyLock() external view returns (address supplyLockHolder, uint256 supplyLockExpiration);}

File 25 of 43 : IGetFees.sol

// SPDX-License-Identifier: MIT OR Apache-2.0pragma solidity ^0.8.18;/** * @notice An interface for communicating fees to 3rd party marketplaces. * @dev Originally implemented in mainnet contract 0x44d6e8933f8271abcf253c72f9ed7e0e4c0323b3 */interface IGetFees { /** * @notice Get the recipient addresses to which creator royalties should be sent. * @dev The expected royalty amounts are communicated with `getFeeBps`. * @param tokenId The ID of the NFT to get royalties for. * @return recipients An array of addresses to which royalties should be sent. */ function getFeeRecipients(uint256 tokenId) external view returns (address payable[] memory recipients); /** * @notice Get the creator royalty amounts to be sent to each recipient, in basis points. * @dev The expected recipients are communicated with `getFeeRecipients`. * @param tokenId The ID of the NFT to get royalties for. * @return royaltiesInBasisPoints The array of fees to be sent to each recipient, in basis points. */ function getFeeBps(uint256 tokenId) external view returns (uint256[] memory royaltiesInBasisPoints);}

File 26 of 43 : IGetRoyalties.sol

// SPDX-License-Identifier: MIT OR Apache-2.0pragma solidity ^0.8.18;interface IGetRoyalties { /** * @notice Get the creator royalties to be sent. * @dev The data is the same as when calling `getFeeRecipients` and `getFeeBps` separately. * @param tokenId The ID of the NFT to get royalties for. * @return recipients An array of addresses to which royalties should be sent. * @return royaltiesInBasisPoints The array of fees to be sent to each recipient, in basis points. */ function getRoyalties( uint256 tokenId ) external view returns (address payable[] memory recipients, uint256[] memory royaltiesInBasisPoints);}

File 27 of 43 : IRoyaltyInfo.sol

// SPDX-License-Identifier: MIT OR Apache-2.0pragma solidity ^0.8.18;/** * @notice Interface for EIP-2981: NFT Royalty Standard. * For more see: https://eips.ethereum.org/EIPS/eip-2981. */interface IRoyaltyInfo { /** * @notice Get the creator royalties to be sent. * @param tokenId The ID of the NFT to get royalties for. * @param salePrice The total price of the sale. * @return receiver The address to which royalties should be sent. * @return royaltyAmount The total amount that should be sent to the `receiver`. */ function royaltyInfo( uint256 tokenId, uint256 salePrice ) external view returns (address receiver, uint256 royaltyAmount);}

File 28 of 43 : ITokenCreator.sol

// SPDX-License-Identifier: MIT OR Apache-2.0pragma solidity ^0.8.18;interface ITokenCreator { /** * @notice Returns the creator of this NFT collection. * @param tokenId The ID of the NFT to get the creator payment address for. * @return creator The creator of this collection. */ function tokenCreator(uint256 tokenId) external view returns (address payable creator);}

File 29 of 43 : StringsLibrary.sol

// SPDX-License-Identifier: MIT OR Apache-2.0pragma solidity ^0.8.18;import { Strings } from "@openzeppelin/contracts/utils/Strings.sol";library StringsLibrary { using Strings for uint256; error StringsLibrary_Required_String_Is_Empty(); /** * @notice Converts a number into a string and adds leading "0"s so the total string length matches `digitCount`. */ function padLeadingZeros(uint256 value, uint256 digitCount) internal pure returns (string memory paddedString) { paddedString = value.toString(); for (uint256 i = bytes(paddedString).length; i < digitCount; ) { paddedString = string.concat("0", paddedString); unchecked { ++i; } } } function validateStringNotEmpty(string memory str) internal pure { if (bytes(str).length == 0) { revert StringsLibrary_Required_String_Is_Empty(); } }}

File 30 of 43 : TimeLibrary.sol

// SPDX-License-Identifier: MIT OR Apache-2.0pragma solidity ^0.8.18;/** * @title Helpers for working with time. * @author batu-inal & HardlyDifficult */library TimeLibrary { /** * @notice Checks if the given timestamp is in the past. * @dev This helper ensures a consistent interpretation of expiry across the codebase. * This is different than `hasBeenReached` in that it will return false if the expiry is now. */ function hasExpired(uint256 expiry) internal view returns (bool) { return expiry < block.timestamp; } /** * @notice Checks if the given timestamp is now or in the past. * @dev This helper ensures a consistent interpretation of expiry across the codebase. * This is different from `hasExpired` in that it will return true if the timestamp is now. */ function hasBeenReached(uint256 timestamp) internal view returns (bool) { return timestamp <= block.timestamp; }}

File 31 of 43 : CollectionRoyalties.sol

// SPDX-License-Identifier: MIT OR Apache-2.0pragma solidity ^0.8.18;import "@openzeppelin/contracts-upgradeable-v5/utils/introspection/ERC165Upgradeable.sol";import "../../interfaces/standards/royalties/IGetFees.sol";import "../../interfaces/standards/royalties/IGetRoyalties.sol";import "../../interfaces/standards/royalties/IRoyaltyInfo.sol";import "../../interfaces/standards/royalties/ITokenCreator.sol";import "../shared/Constants.sol";/** * @title Defines various royalty APIs for broad marketplace support. * @author batu-inal & HardlyDifficult */abstract contract CollectionRoyalties is IGetRoyalties, IGetFees, IRoyaltyInfo, ITokenCreator, ERC165Upgradeable { /** * @inheritdoc IGetFees */ function getFeeRecipients(uint256 tokenId) external view returns (address payable[] memory recipients) { recipients = new address payable[](1); recipients[0] = getTokenCreatorPaymentAddress(tokenId); } /** * @inheritdoc IGetFees * @dev The tokenId param is ignored since all NFTs return the same value. */ function getFeeBps(uint256 /* tokenId */) external pure returns (uint256[] memory royaltiesInBasisPoints) { royaltiesInBasisPoints = new uint256[](1); royaltiesInBasisPoints[0] = ROYALTY_IN_BASIS_POINTS; } /** * @inheritdoc IGetRoyalties */ function getRoyalties( uint256 tokenId ) external view returns (address payable[] memory recipients, uint256[] memory royaltiesInBasisPoints) { recipients = new address payable[](1); recipients[0] = getTokenCreatorPaymentAddress(tokenId); royaltiesInBasisPoints = new uint256[](1); royaltiesInBasisPoints[0] = ROYALTY_IN_BASIS_POINTS; } /** * @notice The address to pay the creator proceeds/royalties for the collection. * @param tokenId The ID of the NFT to get the creator payment address for. * @return creatorPaymentAddress The address to which royalties should be paid. */ function getTokenCreatorPaymentAddress( uint256 tokenId ) public view virtual returns (address payable creatorPaymentAddress); /** * @inheritdoc IRoyaltyInfo */ function royaltyInfo( uint256 tokenId, uint256 salePrice ) external view returns (address receiver, uint256 royaltyAmount) { receiver = getTokenCreatorPaymentAddress(tokenId); unchecked { royaltyAmount = salePrice / ROYALTY_RATIO; } } /** * @inheritdoc IERC165 * @dev Checks the supported royalty interfaces. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool interfaceSupported) { interfaceSupported = (interfaceId == type(IRoyaltyInfo).interfaceId || interfaceId == type(ITokenCreator).interfaceId || interfaceId == type(IGetRoyalties).interfaceId || interfaceId == type(IGetFees).interfaceId || super.supportsInterface(interfaceId)); }}

File 32 of 43 : LazyMintedCollection.sol

// SPDX-License-Identifier: MIT OR Apache-2.0pragma solidity ^0.8.18;import { IERC165 } from "@openzeppelin/contracts/utils/introspection/IERC165.sol";import { INFTLazyMintedCollectionMintCountTo } from "../../interfaces/internal/INFTLazyMintedCollectionMintCountTo.sol";import { AccessControlUpgradeable } from "@openzeppelin/contracts-upgradeable-v5/access/AccessControlUpgradeable.sol";import { ERC721Upgradeable } from "@openzeppelin/contracts-upgradeable-v5/token/ERC721/ERC721Upgradeable.sol";import { AdminRole } from "../roles/AdminRole.sol";import { MinterRole } from "../roles/MinterRole.sol";import { SelfDestructibleCollection } from "./SelfDestructibleCollection.sol";import { SequentialMintCollection } from "./SequentialMintCollection.sol";error LazyMintedCollection_Mint_Count_Must_Be_Greater_Than_Zero();/** * @title Common functions for collections in which all tokens are defined at the time of collection creation. * @dev This implements the INFTLazyMintedCollectionMintCountTo ERC-165 interface. * @author HardlyDifficult */abstract contract LazyMintedCollection is INFTLazyMintedCollectionMintCountTo, MinterRole, SequentialMintCollection, SelfDestructibleCollection{ function _initializeLazyMintedCollection(address payable _creator, address _approvedMinter) internal { // Initialize access control AdminRole._initializeAdminRole(_creator); if (_approvedMinter != address(0)) { MinterRole._initializeMinterRole(_approvedMinter); } } /** * @notice Mint `count` number of NFTs for the `to` address. * @dev This is only callable by an address with either the MINTER_ROLE or the DEFAULT_ADMIN_ROLE. * @param count The number of NFTs to mint. * @param to The address to mint the NFTs for. * @return firstTokenId The tokenId for the first NFT minted. * The other minted tokens are assigned sequentially, so `firstTokenId` - `firstTokenId + count - 1` were minted. */ function mintCountTo(uint16 count, address to) public virtual hasPermissionToMint returns (uint256 firstTokenId) { if (count == 0) { revert LazyMintedCollection_Mint_Count_Must_Be_Greater_Than_Zero(); } unchecked { // If +1 overflows then +count would also overflow, since count > 0. firstTokenId = latestTokenId + 1; } // If the mint will exceed uint32, the addition here will overflow. But it's not realistic to mint that many tokens. latestTokenId = latestTokenId + count; uint256 lastTokenId = latestTokenId; for (uint256 i = firstTokenId; i <= lastTokenId; ) { _safeMint(to, i); unchecked { ++i; } } } /** * @notice Allows a collection admin to destroy this contract only if * no NFTs have been minted yet or the minted NFTs have been burned. * @dev Once destructed, a new collection could be deployed to this address (although that's discouraged). */ function selfDestruct() external onlyAdmin { _selfDestruct(); } /** * @inheritdoc ERC721Upgradeable * @dev The function here asserts `onlyAdmin` while the super confirms ownership. */ function _update(address to, uint256 tokenId, address auth) internal virtual override returns (address from) { if (to == address(0)) { // Only admins have permission to burn. _requireAdmin(); } from = super._update(to, tokenId, auth); } /// @inheritdoc IERC165 function supportsInterface( bytes4 interfaceId ) public view virtual override(AccessControlUpgradeable, ERC721Upgradeable) returns (bool isSupported) { isSupported = interfaceId == type(INFTLazyMintedCollectionMintCountTo).interfaceId || super.supportsInterface(interfaceId); } function totalSupply() public view virtual override(SelfDestructibleCollection, SequentialMintCollection) returns (uint256 supply) { supply = super.totalSupply(); }}

File 33 of 43 : NFTCollectionType.sol

// SPDX-License-Identifier: MIT OR Apache-2.0pragma solidity ^0.8.18;import "@openzeppelin/contracts-upgradeable-v5/utils/introspection/ERC165Upgradeable.sol";import "@openzeppelin/contracts/utils/ShortStrings.sol";import "../../interfaces/internal/INFTCollectionType.sol";/** * @title A mixin to add the NFTCollectionType interface to a contract. * @author HardlyDifficult & reggieag */abstract contract NFTCollectionType is INFTCollectionType { using ShortStrings for string; using ShortStrings for ShortString; ShortString private immutable _collectionTypeName; constructor(string memory collectionTypeName) { _collectionTypeName = collectionTypeName.toShortString(); } /** * @notice Returns a name of the type of collection this contract represents. * @return collectionType The collection type. */ function getNFTCollectionType() external view returns (string memory collectionType) { collectionType = _collectionTypeName.toString(); }}

File 34 of 43 : NFTMetadataUpdate.sol

// SPDX-License-Identifier: CC0-1.0pragma solidity ^0.8.18;import { ERC165Upgradeable } from "@openzeppelin/contracts-upgradeable-v5/utils/introspection/ERC165Upgradeable.sol";/** * @title ERC-4906: Metadata Update Events. * @dev See https://eips.ethereum.org/EIPS/eip-4906 */contract NFTMetadataUpdate is ERC165Upgradeable { /** * @notice This event emits when the metadata of a token is changed. So that the third-party platforms such as an NFT * market could timely update the images and related attributes of the NFT. * @param tokenId The ID of the NFT whose metadata is changed. */ event MetadataUpdate(uint256 tokenId); /** * @notice This event emits when the metadata of a range of tokens is changed. So that the third-party platforms such * as an NFT market could timely update the images and related attributes of the NFTs. * @param fromTokenId The ID of the first NFT whose metadata is changed. * @param toTokenId The ID of the last NFT whose metadata is changed. */ event BatchMetadataUpdate(uint256 fromTokenId, uint256 toTokenId); function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool isSupported) { // 0x49064906 is a magic number based on the EIP number. isSupported = interfaceId == bytes4(0x49064906) || super.supportsInterface(interfaceId); }}

File 35 of 43 : SelfDestructibleCollection.sol

// SPDX-License-Identifier: MIT OR Apache-2.0pragma solidity ^0.8.18;import { ContextUpgradeable } from "@openzeppelin/contracts-upgradeable-v5/utils/ContextUpgradeable.sol";/** * @title Allows the contract owner to signal that this contract should no longer be used. * @author HardlyDifficult * @dev It's understood that self destruct is no longer functional on-chain. This feature is still used to signal to the * app that a collection should be hidden. * This feature may be renamed in the future and may disable the contract instead, e.g. "brick contract". */abstract contract SelfDestructibleCollection is ContextUpgradeable { /** * @notice Emitted when this collection is self destructed by the creator/owner/admin. * @param operator The account which requested this contract be self destructed. */ event SelfDestruct(address indexed operator); error SelfDestructibleCollection_Minted_NFTs_Must_Be_Burned_First(uint256 totalSupply); function totalSupply() public view virtual returns (uint256 supply); /** * @notice Allows the collection owner to signal that this contract should no longer be used only if no NFTs have been * minted yet or the minted NFTs have been burned. * @dev The caller is responsible for checking the caller's permissions. */ function _selfDestruct() internal { if (totalSupply() != 0) { revert SelfDestructibleCollection_Minted_NFTs_Must_Be_Burned_First(totalSupply()); } address sender = _msgSender(); // The event appears to only emit when called before `selfdestruct`. emit SelfDestruct(sender); // It is understood that this is no longer effective. It does still communicate intent and the event allows our // app to hide these collections. The feature will be reevaluated in the future. selfdestruct(payable(sender)); }}

File 36 of 43 : SequentialMintCollection.sol

// SPDX-License-Identifier: MIT OR Apache-2.0pragma solidity ^0.8.18;// solhint-disable max-line-lengthimport { ITokenCreator } from "../../interfaces/standards/royalties/ITokenCreator.sol";import { ERC721BurnableUpgradeable } from "@openzeppelin/contracts-upgradeable-v5/token/ERC721/extensions/ERC721BurnableUpgradeable.sol";import { Ownable2StepUpgradeable } from "@openzeppelin/contracts-upgradeable-v5/access/Ownable2StepUpgradeable.sol";// solhint-enable max-line-length/** * @title Extends the OZ ERC721 implementation for collections which mint sequential token IDs. * @author batu-inal & HardlyDifficult */abstract contract SequentialMintCollection is ITokenCreator, Ownable2StepUpgradeable, ERC721BurnableUpgradeable { /** * @notice The tokenId of the most recently created NFT. * @dev Minting starts at tokenId 1. Each mint will use this value + 1. * @return The most recently minted tokenId, or 0 if no NFTs have been minted yet. */ uint32 public latestTokenId; /** * @notice Tracks how many tokens have been burned. * @dev This number is used to calculate the total supply efficiently. */ uint32 private burnCounter; function _update(address to, uint256 tokenId, address auth) internal virtual override returns (address from) { if (to == address(0)) { _checkOwner(); unchecked { // Number of burned tokens cannot exceed latestTokenId which is the same size. ++burnCounter; } } from = super._update(to, tokenId, auth); } /** * @inheritdoc ITokenCreator * @dev The tokenId param is ignored since all NFTs return the same value. */ function tokenCreator(uint256 /* tokenId */) external view returns (address payable creator) { creator = payable(owner()); } /** * @notice Returns the total amount of tokens stored by the contract. * @dev From the ERC-721 enumerable standard. * @return supply The total number of NFTs tracked by this contract. */ function totalSupply() public view virtual returns (uint256 supply) { unchecked { // Number of tokens minted is always >= burned tokens. supply = latestTokenId - burnCounter; } }}

File 37 of 43 : SharedPaymentCollection.sol

// SPDX-License-Identifier: MIT OR Apache-2.0pragma solidity ^0.8.18;import { Ownable2StepUpgradeable } from "@openzeppelin/contracts-upgradeable-v5/access/Ownable2StepUpgradeable.sol";/** * @title Offers single payment address definition for all items in a given collection. * @author HardlyDifficult */abstract contract SharedPaymentCollection is Ownable2StepUpgradeable { /** * @notice The address to pay the proceeds/royalties for the collection. * @dev If this is set to address(0) then the proceeds go to the creator. */ address payable private $paymentAddress; function _initializeSharedPaymentCollection(address payable paymentAddress) internal { // If no payment address was defined, `.owner` will be returned in getTokenCreatorPaymentAddress() below. $paymentAddress = paymentAddress; } function getTokenCreatorPaymentAddress( uint256 /* tokenId */ ) public view virtual returns (address payable creatorPaymentAddress) { creatorPaymentAddress = $paymentAddress; if (creatorPaymentAddress == address(0)) { creatorPaymentAddress = payable(owner()); } }}

File 38 of 43 : SharedURICollection.sol

// SPDX-License-Identifier: MIT OR Apache-2.0pragma solidity ^0.8.18;import { ERC721Upgradeable } from "@openzeppelin/contracts-upgradeable-v5/token/ERC721/ERC721Upgradeable.sol";import { StringsLibrary } from "../../libraries/StringsLibrary.sol";/** * @title Implements a URI for a collection which is shared by all tokens. * @author HardlyDifficult */abstract contract SharedURICollection is ERC721Upgradeable { string private $baseURI; /** * @notice Set the base URI to be used for all tokens. * @param uri The base URI to use. */ function _setBaseURI(string calldata uri) internal { StringsLibrary.validateStringNotEmpty(uri); $baseURI = uri; } /** * @inheritdoc ERC721Upgradeable */ function _baseURI() internal view virtual override returns (string memory uri) { uri = $baseURI; }}

File 39 of 43 : SupplyLock.sol

// SPDX-License-Identifier: MIT OR Apache-2.0pragma solidity ^0.8.18;import "../../interfaces/internal/INFTSupplyLock.sol";import "../../libraries/TimeLibrary.sol";import "../roles/MinterRole.sol";import "../shared/Constants.sol";/// @param supplyLockExpiration The time at which supply is no longer locked.error SupplyLock_Action_Disallowed_While_Supply_Is_Locked(uint256 supplyLockExpiration);/// @param supplyLockHolder The address of the account holding the supply lock./// @param supplyLockExpiration The time at which supply is no longer restricted.error SupplyLock_Caller_Is_Not_Supply_Lock_Holder(address supplyLockHolder, uint256 supplyLockExpiration);error SupplyLock_Existing_Lock_Has_Already_Expired();error SupplyLock_Expiration_Time_In_The_Past();error SupplyLock_Expiration_Time_Too_Far_In_The_Future(uint256 maxExpiration);/** * @title Allow collections to support restricting supply modifications to a single minter for a period of time. * @notice This is used to prevent supply changes during a sale - impacting mints by other users as well as preventing * changes to the max supply. * @dev The supply lock holder may have their minter role revoked, however they still maintain access until the * previously specified expiration. * @author HardlyDifficult */abstract contract SupplyLock is INFTSupplyLock, MinterRole { using TimeLibrary for uint256; using TimeLibrary for uint40; /// @notice The time at which the supply is no longer restricted. /// @dev Expiration is specified first in order to pack with free storage in the previous mixin. uint40 private $supplyLockExpiration; /// @notice If set, only this address may mint tokens until the `supplyLockExpiration` has been reached. address private $supplyLock; /** * @notice Emitted when a supply lock has been granted to an approved minter. * @param supplyLock The address of the minter with the supply lock for a period of time. * @param supplyLockExpiration The time at which supply is no longer restricted. */ event MinterAcquireSupplyLock(address indexed supplyLock, uint256 supplyLockExpiration); /** * @notice Reverts if a supply lock has been requested (and has not expired). */ modifier notDuringSupplyLock() { if (!$supplyLockExpiration.hasExpired()) { revert SupplyLock_Action_Disallowed_While_Supply_Is_Locked($supplyLockExpiration); } _; } /** * @inheritdoc INFTSupplyLock */ function minterAcquireSupplyLock(uint256 expiration) external hasPermissionToMint { if (expiration == 0) { /* CHECKS */ // When expiration is 0, clear the supply lock configuration. if ($supplyLockExpiration.hasExpired()) { revert SupplyLock_Existing_Lock_Has_Already_Expired(); } /* EFFECTS */ delete $supplyLock; delete $supplyLockExpiration; emit MinterAcquireSupplyLock(address(0), 0); } else { /* CHECKS */ if (expiration.hasExpired()) { revert SupplyLock_Expiration_Time_In_The_Past(); } unchecked { // timestamp + 2 years can never realistically overflow 256 bits. if (expiration > block.timestamp + MAX_SCHEDULED_TIME_IN_THE_FUTURE) { revert SupplyLock_Expiration_Time_Too_Far_In_The_Future(block.timestamp + MAX_SCHEDULED_TIME_IN_THE_FUTURE); } } if (!$supplyLockExpiration.hasExpired() && expiration > $supplyLockExpiration) { // If the user is overwriting an existing configuration to increase the time left, confirm they have not had // their role revoked. super._requirePermissionToMint(); } /* EFFECTS */ $supplyLock = msg.sender; // timestamp + 2 years will never realistically overflow 40 bits (sometime after year 36,000). $supplyLockExpiration = uint40(expiration); emit MinterAcquireSupplyLock(msg.sender, expiration); } } /** * @inheritdoc INFTSupplyLock */ function getSupplyLock() external view returns (address supplyLockHolder, uint256 supplyLockExpiration) { supplyLockExpiration = $supplyLockExpiration; if (!supplyLockExpiration.hasExpired()) { supplyLockHolder = $supplyLock; } else { // Once expired, return (0x0, 0) instead of the stale data. supplyLockExpiration = 0; } } /** * @inheritdoc MinterRole * @dev This supplements the MinterRole implementation to enforce the supply lock if it has been requested. */ function _requirePermissionToMint() internal view virtual override { if (!$supplyLockExpiration.hasExpired()) { // When in the supply lock time period, require the caller is the supply lock holder. if ($supplyLock != msg.sender) { revert SupplyLock_Caller_Is_Not_Supply_Lock_Holder($supplyLock, $supplyLockExpiration); } // Skip the role check so that the supply lock holder's access cannot be revoked until the expiration. } else { // Otherwise, check the MinterRole permissions. super._requirePermissionToMint(); } }}

File 40 of 43 : TokenLimitedCollection.sol

// SPDX-License-Identifier: MIT OR Apache-2.0pragma solidity ^0.8.18;import "./SequentialMintCollection.sol";error TokenLimitedCollection_Max_Token_Id_May_Not_Be_Cleared(uint256 currentMaxTokenId);error TokenLimitedCollection_Max_Token_Id_May_Not_Increase(uint256 currentMaxTokenId);error TokenLimitedCollection_Max_Token_Id_Must_Be_Greater_Than_Current_Minted_Count(uint256 currentMintedCount);error TokenLimitedCollection_Max_Token_Id_Must_Not_Be_Zero();/** * @title Defines an upper limit on the number of tokens which may be minted by this collection. * @author HardlyDifficult */abstract contract TokenLimitedCollection is SequentialMintCollection { /** * @notice The max tokenId which can be minted. * @dev This max may be less than the final `totalSupply` if 1 or more tokens were burned. * @return The max tokenId which can be minted. */ uint32 public maxTokenId; /** * @notice Emitted when the max tokenId supported by this collection is updated. * @param maxTokenId The new max tokenId. All NFTs in this collection will have a tokenId less than * or equal to this value. */ event MaxTokenIdUpdated(uint256 indexed maxTokenId); function _initializeTokenLimitedCollection(uint32 _maxTokenId) internal { if (_maxTokenId == 0) { // When 0 is desired, the collection may choose to simply not call this initializer. revert TokenLimitedCollection_Max_Token_Id_Must_Not_Be_Zero(); } maxTokenId = _maxTokenId; } /** * @notice Allows the owner to set a max tokenID. * This provides a guarantee to collectors about the limit of this collection contract, if applicable. * @dev Once this value has been set, it may be decreased but can never be increased. * @param _maxTokenId The max tokenId to set, all NFTs must have a tokenId less than or equal to this value. */ function _updateMaxTokenId(uint32 _maxTokenId) internal { if (_maxTokenId == 0) { revert TokenLimitedCollection_Max_Token_Id_May_Not_Be_Cleared(maxTokenId); } if (maxTokenId != 0 && _maxTokenId >= maxTokenId) { revert TokenLimitedCollection_Max_Token_Id_May_Not_Increase(maxTokenId); } if (latestTokenId > _maxTokenId) { revert TokenLimitedCollection_Max_Token_Id_Must_Be_Greater_Than_Current_Minted_Count(latestTokenId); } maxTokenId = _maxTokenId; emit MaxTokenIdUpdated(_maxTokenId); }}

File 41 of 43 : AdminRole.sol

// SPDX-License-Identifier: MIT OR Apache-2.0pragma solidity ^0.8.18;import { AccessControlUpgradeable } from "@openzeppelin/contracts-upgradeable-v5/access/AccessControlUpgradeable.sol";import { Ownable2StepUpgradeable } from "@openzeppelin/contracts-upgradeable-v5/access/Ownable2StepUpgradeable.sol";/** * @title Defines a role for admin accounts. * @dev Wraps the default admin role from OpenZeppelin's AccessControl for easy integration. * @author batu-inal & HardlyDifficult */abstract contract AdminRole is Ownable2StepUpgradeable, AccessControlUpgradeable { error AdminRole_Caller_Does_Not_Have_Admin_Role(); modifier onlyAdmin() { _requireAdmin(); _; } function _initializeAdminRole(address admin) internal { // Grant the role to a specified account _grantRole(DEFAULT_ADMIN_ROLE, admin); } /** * @notice Adds an account as an approved admin. * @dev Only callable by existing admins, as enforced by `grantRole`. * @param account The address to be approved. */ function grantAdmin(address account) external { grantRole(DEFAULT_ADMIN_ROLE, account); } /** * @notice Removes an account from the set of approved admins. * @dev Only callable by existing admins, as enforced by `revokeRole`. * @param account The address to be removed. */ function revokeAdmin(address account) external { revokeRole(DEFAULT_ADMIN_ROLE, account); } /** * @notice Checks if the account provided is an admin. * @param account The address to check. * @return approved True if the account is an admin. * @dev This call is used by the royalty registry contract. */ function isAdmin(address account) public view returns (bool approved) { approved = hasRole(DEFAULT_ADMIN_ROLE, account); } function _requireAdmin() internal view { if (!hasRole(DEFAULT_ADMIN_ROLE, _msgSender())) { revert AdminRole_Caller_Does_Not_Have_Admin_Role(); } } function hasRole(bytes32 role, address account) public view virtual override returns (bool accountHasRole) { if (role == DEFAULT_ADMIN_ROLE && account == owner()) { accountHasRole = true; } else { accountHasRole = super.hasRole(role, account); } } /** * @notice This empty reserved space is put in place to allow future versions to add new variables without shifting * down storage in the inheritance chain. See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[1_000] private __gap;}

File 42 of 43 : MinterRole.sol

// SPDX-License-Identifier: MIT OR Apache-2.0pragma solidity ^0.8.18;import { AdminRole } from "./AdminRole.sol";error MinterRole_Caller_Does_Not_Have_Minter_Or_Admin_Role();/** * @title Defines a role for minter accounts. * @dev Wraps a role from OpenZeppelin's AccessControl for easy integration. * @author batu-inal & HardlyDifficult */abstract contract MinterRole is AdminRole { /** * @notice The `role` type used for approve minters. * @return `keccak256("MINTER_ROLE")` */ bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE"); /** * @notice Ensures that the sender has permissions to mint. * @dev Restrictions may be extended in derived contracts via overriding `_requirePermissionToMint`. */ modifier hasPermissionToMint() { _requirePermissionToMint(); _; } function _initializeMinterRole(address minter) internal { // Grant the role to a specified account _grantRole(MINTER_ROLE, minter); } /** * @notice Adds an account as an approved minter. * @dev Only callable by admins, as enforced by `grantRole`. * @param account The address to be approved. */ function grantMinter(address account) external { grantRole(MINTER_ROLE, account); } /** * @notice Removes an account from the set of approved minters. * @dev Only callable by admins, as enforced by `revokeRole`. * @param account The address to be removed. */ function revokeMinter(address account) external { revokeRole(MINTER_ROLE, account); } /** * @notice Checks if the account provided is an minter. * @param account The address to check. * @return approved True if the account is an minter. */ function isMinter(address account) public view returns (bool approved) { approved = hasRole(MINTER_ROLE, account); } /** * @notice Reverts if the current sender is not approved to mint from this contract. * @dev This virtual function allows other mixins to add additional restrictions on minting. */ function _requirePermissionToMint() internal view virtual { address sender = _msgSender(); if (!isMinter(sender) && !isAdmin(sender)) { revert MinterRole_Caller_Does_Not_Have_Minter_Or_Admin_Role(); } }}

File 43 of 43 : Constants.sol

// SPDX-License-Identifier: MIT OR Apache-2.0pragma solidity ^0.8.18;/// Constant values shared across mixins./// @dev 100% in basis points.uint256 constant BASIS_POINTS = 10_000;/// @dev The default admin role defined by OZ ACL modules.bytes32 constant DEFAULT_ADMIN_ROLE = 0x00;/// @dev The `role` type used to validate drop collections have granted this market access to mint.bytes32 constant MINTER_ROLE = keccak256("MINTER_ROLE");////////////////////////////////////////////////////////////////// Royalties & Take Rates/////////////////////////////////////////////////////////////////// @dev The max take rate a World can have.uint256 constant MAX_WORLD_TAKE_RATE = 5_000;/// @dev Cap the number of royalty recipients./// A cap is required to ensure gas costs are not too high when a sale is settled.uint256 constant MAX_ROYALTY_RECIPIENTS = 5;/// @dev Default royalty cut paid out on secondary sales./// Set to 10% of the secondary sale.uint96 constant ROYALTY_IN_BASIS_POINTS = 1_000;/// @dev Reward paid to referrers when a sale is made./// Set to 20% of the protocol fee.uint96 constant BUY_REFERRER_IN_BASIS_POINTS = 2000;/// @dev 10%, expressed as a denominator for more efficient calculations.uint256 constant ROYALTY_RATIO = BASIS_POINTS / ROYALTY_IN_BASIS_POINTS;/// @dev 20%, expressed as a denominator for more efficient calculations.uint256 constant BUY_REFERRER_RATIO = BASIS_POINTS / BUY_REFERRER_IN_BASIS_POINTS;////////////////////////////////////////////////////////////////// Gas Limits/////////////////////////////////////////////////////////////////// @dev The gas limit used when making external read-only calls./// This helps to ensure that external calls does not prevent the market from executing.uint256 constant READ_ONLY_GAS_LIMIT = 40_000;/// @dev The gas limit to send ETH to multiple recipients, enough for a 5-way split.uint256 constant SEND_VALUE_GAS_LIMIT_MULTIPLE_RECIPIENTS = 210_000;/// @dev The gas limit to send ETH to a single recipient, enough for a contract with a simple receiver.uint256 constant SEND_VALUE_GAS_LIMIT_SINGLE_RECIPIENT = 20_000;////////////////////////////////////////////////////////////////// Collection Type Names/////////////////////////////////////////////////////////////////// @dev The NFT collection type.string constant NFT_COLLECTION_TYPE = "NFT Collection";/// @dev The NFT drop collection type.string constant NFT_DROP_COLLECTION_TYPE = "NFT Drop Collection";/// @dev The NFT timed edition collection type.string constant NFT_TIMED_EDITION_COLLECTION_TYPE = "NFT Timed Edition Collection";/// @dev The NFT limited edition collection type.string constant NFT_LIMITED_EDITION_COLLECTION_TYPE = "NFT Limited Edition Collection";/// @dev The Multi-Token (ERC-1155) collection type.string constant MULTI_TOKEN_COLLECTION_TYPE = "Multi-Token Collection";////////////////////////////////////////////////////////////////// Business Logic/////////////////////////////////////////////////////////////////// @dev Limits scheduled start/end times to be less than 2 years in the future.uint256 constant MAX_SCHEDULED_TIME_IN_THE_FUTURE = 365 days * 2;/// @dev The minimum increase of 10% required when making an offer or placing a bid.uint256 constant MIN_PERCENT_INCREMENT_DENOMINATOR = BASIS_POINTS / 1_000;/// @dev The fixed fee charged for each NFT minted.uint256 constant MINT_FEE_IN_WEI = 0.0008 ether;/// @dev Default for how long an auction lasts for once the first bid has been received.uint256 constant DEFAULT_DURATION = 1 days;/// @dev The window for auction extensions, any bid placed in the final 5 minutes/// of an auction will reset the time remaining to 5 minutes.uint256 constant EXTENSION_DURATION = 5 minutes;/// @dev Caps the max duration that may be configured for an auction.uint256 constant MAX_DURATION = 7 days;

Settings

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