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ERC-721
NFT
Overview
Max Total Supply
3,222 NIPPY
Holders
539
Market
Volume (24H)
0.7295 ETH
Min Price (24H)
$624.46 @ 0.179749 ETH
Max Price (24H)
$660.07 @ 0.190000 ETH
Other Info
Token Contract
Balance
2 NIPPYLoading...
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Minimal Proxy Contract for 0xa878c0aeaaa76ec7a370b76ac5bcac4364ed60e1
Contract Name:
ERC721ATieredSalesCollection
Compiler Version
v0.8.9+commit.e5eed63a
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: AGPL-3.0 pragma solidity 0.8.9; import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/token/ERC721/ERC721.sol"; import "../../../common/WithdrawExtension.sol"; import "../../../common/meta-transactions/ERC2771ContextOwnable.sol"; import "../../ERC721/extensions/ERC721RoyaltyExtension.sol"; import "../extensions/ERC721ACollectionMetadataExtension.sol"; import "../extensions/ERC721APrefixedMetadataExtension.sol"; import "../extensions/ERC721AMinterExtension.sol"; import "../extensions/ERC721AOwnerMintExtension.sol"; import "../extensions/ERC721ATieringExtension.sol"; import "../extensions/ERC721ARoleBasedMintExtension.sol"; import "../extensions/ERC721ARoleBasedLockableExtension.sol"; contract ERC721ATieredSalesCollection is Ownable, ERC165Storage, WithdrawExtension, ERC721ACollectionMetadataExtension, ERC721APrefixedMetadataExtension, ERC721AOwnerMintExtension, ERC721ATieringExtension, ERC721ARoleBasedMintExtension, ERC721ARoleBasedLockableExtension, ERC721RoyaltyExtension, ERC2771ContextOwnable { struct Config { string name; string symbol; string contractURI; string placeholderURI; string tokenURIPrefix; uint256 maxSupply; Tier[] tiers; address defaultRoyaltyAddress; uint16 defaultRoyaltyBps; address proceedsRecipient; address trustedForwarder; } constructor(Config memory config) ERC721A(config.name, config.symbol) { initialize(config, msg.sender); } function initialize(Config memory config, address deployer) public initializer { _setupRole(DEFAULT_ADMIN_ROLE, deployer); _transferOwnership(deployer); __WithdrawExtension_init(config.proceedsRecipient, WithdrawMode.ANYONE); __ERC721ACollectionMetadataExtension_init( config.name, config.symbol, config.contractURI ); __ERC721APrefixedMetadataExtension_init( config.placeholderURI, config.tokenURIPrefix ); __ERC721AMinterExtension_init(config.maxSupply); __ERC721AOwnerMintExtension_init(); __ERC721ARoleBasedMintExtension_init(deployer); __ERC721ARoleBasedLockableExtension_init(); __ERC721ATieringExtension_init(config.tiers); __ERC721RoyaltyExtension_init( config.defaultRoyaltyAddress, config.defaultRoyaltyBps ); __ERC2771ContextOwnable_init(config.trustedForwarder); } function _msgSender() internal view virtual override(ERC2771ContextOwnable, Context) returns (address sender) { return ERC2771ContextOwnable._msgSender(); } function _msgData() internal view virtual override(ERC2771ContextOwnable, Context) returns (bytes calldata) { return ERC2771ContextOwnable._msgData(); } function _beforeTokenTransfers( address from, address to, uint256 startTokenId, uint256 quantity ) internal virtual override(ERC721A, ERC721ALockableExtension) { ERC721ALockableExtension._beforeTokenTransfers( from, to, startTokenId, quantity ); } /* PUBLIC */ function supportsInterface(bytes4 interfaceId) public view virtual override( ERC165Storage, ERC721ACollectionMetadataExtension, ERC721APrefixedMetadataExtension, ERC721AOwnerMintExtension, ERC721ARoleBasedMintExtension, ERC721RoyaltyExtension, ERC721ARoleBasedLockableExtension ) returns (bool) { return ERC165Storage.supportsInterface(interfaceId); } function name() public view override(ERC721A, ERC721ACollectionMetadataExtension) returns (string memory) { return ERC721ACollectionMetadataExtension.name(); } function symbol() public view override(ERC721A, ERC721ACollectionMetadataExtension) returns (string memory) { return ERC721ACollectionMetadataExtension.symbol(); } function tokenURI(uint256 _tokenId) public view virtual override(ERC721A, ERC721APrefixedMetadataExtension) returns (string memory) { return ERC721APrefixedMetadataExtension.tokenURI(_tokenId); } function setMaxSupply(uint256 newValue) public virtual override(ERC721AMinterExtension, ERC721ATieringExtension) onlyOwner { ERC721ATieringExtension.setMaxSupply(newValue); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /// @author: manifold.xyz import "@openzeppelin/contracts/utils/introspection/IERC165.sol"; /** * Simple EIP2981 reference override implementation */ interface IEIP2981RoyaltyOverride is IERC165 { event TokenRoyaltyRemoved(uint256 tokenId); event TokenRoyaltySet(uint256 tokenId, address recipient, uint16 bps); event DefaultRoyaltySet(address recipient, uint16 bps); struct TokenRoyalty { address recipient; uint16 bps; } struct TokenRoyaltyConfig { uint256 tokenId; address recipient; uint16 bps; } /** * @dev Set per token royalties. Passing a recipient of address(0) will delete any existing configuration */ function setTokenRoyalties(TokenRoyaltyConfig[] calldata royalties) external; /** * @dev Get the number of token specific overrides. Used to enumerate over all configurations */ function getTokenRoyaltiesCount() external view returns(uint256); /** * @dev Get a token royalty configuration by index. Use in conjunction with getTokenRoyaltiesCount to get all per token configurations */ function getTokenRoyaltyByIndex(uint256 index) external view returns(TokenRoyaltyConfig memory); /** * @dev Set a default royalty configuration. Will be used if no token specific configuration is set */ function setDefaultRoyalty(TokenRoyalty calldata royalty) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /// @author: manifold.xyz import "@openzeppelin/contracts/utils/introspection/ERC165.sol"; import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol"; import "./IRoyaltyOverride.sol"; import "../specs/IEIP2981.sol"; /** * Simple EIP2981 reference override implementation */ abstract contract EIP2981RoyaltyOverrideCore is IEIP2981, IEIP2981RoyaltyOverride, ERC165 { using EnumerableSet for EnumerableSet.UintSet; TokenRoyalty public defaultRoyalty; mapping(uint256 => TokenRoyalty) private _tokenRoyalties; EnumerableSet.UintSet private _tokensWithRoyalties; function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) { return interfaceId == type(IEIP2981).interfaceId || interfaceId == type(IEIP2981RoyaltyOverride).interfaceId || super.supportsInterface(interfaceId); } /** * @dev Sets token royalties. When you override this in the implementation contract * ensure that you access restrict it to the contract owner or admin */ function _setTokenRoyalties(TokenRoyaltyConfig[] memory royaltyConfigs) internal { for (uint i = 0; i < royaltyConfigs.length; i++) { TokenRoyaltyConfig memory royaltyConfig = royaltyConfigs[i]; require(royaltyConfig.bps < 10000, "Invalid bps"); if (royaltyConfig.recipient == address(0)) { delete _tokenRoyalties[royaltyConfig.tokenId]; _tokensWithRoyalties.remove(royaltyConfig.tokenId); emit TokenRoyaltyRemoved(royaltyConfig.tokenId); } else { _tokenRoyalties[royaltyConfig.tokenId] = TokenRoyalty(royaltyConfig.recipient, royaltyConfig.bps); _tokensWithRoyalties.add(royaltyConfig.tokenId); emit TokenRoyaltySet(royaltyConfig.tokenId, royaltyConfig.recipient, royaltyConfig.bps); } } } /** * @dev Sets default royalty. When you override this in the implementation contract * ensure that you access restrict it to the contract owner or admin */ function _setDefaultRoyalty(TokenRoyalty memory royalty) internal { require(royalty.bps < 10000, "Invalid bps"); defaultRoyalty = TokenRoyalty(royalty.recipient, royalty.bps); emit DefaultRoyaltySet(royalty.recipient, royalty.bps); } /** * @dev See {IEIP2981RoyaltyOverride-getTokenRoyaltiesCount}. */ function getTokenRoyaltiesCount() external override view returns(uint256) { return _tokensWithRoyalties.length(); } /** * @dev See {IEIP2981RoyaltyOverride-getTokenRoyaltyByIndex}. */ function getTokenRoyaltyByIndex(uint256 index) external override view returns(TokenRoyaltyConfig memory) { uint256 tokenId = _tokensWithRoyalties.at(index); TokenRoyalty memory royalty = _tokenRoyalties[tokenId]; return TokenRoyaltyConfig(tokenId, royalty.recipient, royalty.bps); } /** * @dev See {IEIP2981RoyaltyOverride-royaltyInfo}. */ function royaltyInfo(uint256 tokenId, uint256 value) public override view returns (address, uint256) { if (_tokenRoyalties[tokenId].recipient != address(0)) { return (_tokenRoyalties[tokenId].recipient, value*_tokenRoyalties[tokenId].bps/10000); } if (defaultRoyalty.recipient != address(0) && defaultRoyalty.bps != 0) { return (defaultRoyalty.recipient, value*defaultRoyalty.bps/10000); } return (address(0), 0); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * EIP-2981 */ interface IEIP2981 { /** * bytes4(keccak256("royaltyInfo(uint256,uint256)")) == 0x2a55205a * * => 0x2a55205a = 0x2a55205a */ function royaltyInfo(uint256 tokenId, uint256 value) external view returns (address, uint256); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (access/AccessControl.sol) pragma solidity ^0.8.0; import "./IAccessControl.sol"; import "../utils/Context.sol"; import "../utils/Strings.sol"; import "../utils/introspection/ERC165.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: * * ``` * 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}: * * ``` * 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. */ abstract contract AccessControl is Context, IAccessControl, ERC165 { struct RoleData { mapping(address => bool) members; bytes32 adminRole; } mapping(bytes32 => RoleData) private _roles; bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00; /** * @dev Modifier that checks that an account has a specific role. Reverts * with a standardized message including the required role. * * The format of the revert reason is given by the following regular expression: * * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/ * * _Available since v4.1._ */ modifier onlyRole(bytes32 role) { _checkRole(role); _; } /** * @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 override returns (bool) { return _roles[role].members[account]; } /** * @dev Revert with a standard message if `_msgSender()` is missing `role`. * Overriding this function changes the behavior of the {onlyRole} modifier. * * Format of the revert message is described in {_checkRole}. * * _Available since v4.6._ */ function _checkRole(bytes32 role) internal view virtual { _checkRole(role, _msgSender()); } /** * @dev Revert with a standard message if `account` is missing `role`. * * The format of the revert reason is given by the following regular expression: * * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/ */ function _checkRole(bytes32 role, address account) internal view virtual { if (!hasRole(role, account)) { revert( string( abi.encodePacked( "AccessControl: account ", Strings.toHexString(uint160(account), 20), " is missing role ", Strings.toHexString(uint256(role), 32) ) ) ); } } /** * @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 override returns (bytes32) { 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. */ function grantRole(bytes32 role, address account) public virtual override 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. */ function revokeRole(bytes32 role, address account) public virtual override 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 `account`. */ function renounceRole(bytes32 role, address account) public virtual override { require(account == _msgSender(), "AccessControl: can only renounce roles for self"); _revokeRole(role, account); } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. Note that unlike {grantRole}, this function doesn't perform any * checks on the calling account. * * [WARNING] * ==== * This function should only be called from the constructor when setting * up the initial roles for the system. * * Using this function in any other way is effectively circumventing the admin * system imposed by {AccessControl}. * ==== * * NOTE: This function is deprecated in favor of {_grantRole}. */ function _setupRole(bytes32 role, address account) internal virtual { _grantRole(role, account); } /** * @dev Sets `adminRole` as ``role``'s admin role. * * Emits a {RoleAdminChanged} event. */ function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual { bytes32 previousAdminRole = getRoleAdmin(role); _roles[role].adminRole = adminRole; emit RoleAdminChanged(role, previousAdminRole, adminRole); } /** * @dev Grants `role` to `account`. * * Internal function without access restriction. */ function _grantRole(bytes32 role, address account) internal virtual { if (!hasRole(role, account)) { _roles[role].members[account] = true; emit RoleGranted(role, account, _msgSender()); } } /** * @dev Revokes `role` from `account`. * * Internal function without access restriction. */ function _revokeRole(bytes32 role, address account) internal virtual { if (hasRole(role, account)) { _roles[role].members[account] = false; emit RoleRevoked(role, account, _msgSender()); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol) pragma solidity ^0.8.0; /** * @dev External interface of AccessControl declared to support ERC165 detection. */ interface IAccessControl { /** * @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. * * _Available since v3.1._ */ 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 `account`. */ function renounceRole(bytes32 role, address account) external; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(owner() == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (proxy/utils/Initializable.sol) pragma solidity ^0.8.2; import "../../utils/Address.sol"; /** * @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] * ``` * 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 Indicates that the contract has been initialized. * @custom:oz-retyped-from bool */ uint8 private _initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private _initializing; /** * @dev Triggered when the contract has been initialized or reinitialized. */ event Initialized(uint8 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. Equivalent to `reinitializer(1)`. */ modifier initializer() { bool isTopLevelCall = _setInitializedVersion(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. * * `initializer` is equivalent to `reinitializer(1)`, so 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. * * 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. */ modifier reinitializer(uint8 version) { bool isTopLevelCall = _setInitializedVersion(version); if (isTopLevelCall) { _initializing = true; } _; if (isTopLevelCall) { _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() { require(_initializing, "Initializable: contract is not initializing"); _; } /** * @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. */ function _disableInitializers() internal virtual { _setInitializedVersion(type(uint8).max); } function _setInitializedVersion(uint8 version) private returns (bool) { // If the contract is initializing we ignore whether _initialized is set in order to support multiple // inheritance patterns, but we only do this in the context of a constructor, and for the lowest level // of initializers, because in other contexts the contract may have been reentered. if (_initializing) { require( version == 1 && !Address.isContract(address(this)), "Initializable: contract is already initialized" ); return false; } else { require(_initialized < version, "Initializable: contract is already initialized"); _initialized = version; return true; } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol) pragma solidity ^0.8.0; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; constructor() { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and making it call a * `private` function that does the actual work. */ modifier nonReentrant() { // On the first call to nonReentrant, _notEntered will be true require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; _; // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 amount ) external returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/ERC721.sol) pragma solidity ^0.8.0; import "./IERC721.sol"; import "./IERC721Receiver.sol"; import "./extensions/IERC721Metadata.sol"; import "../../utils/Address.sol"; import "../../utils/Context.sol"; import "../../utils/Strings.sol"; import "../../utils/introspection/ERC165.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}. */ contract ERC721 is Context, ERC165, IERC721, IERC721Metadata { using Address for address; using Strings for uint256; // Token name string private _name; // Token symbol string private _symbol; // Mapping from token ID to owner address mapping(uint256 => address) private _owners; // Mapping owner address to token count mapping(address => uint256) private _balances; // Mapping from token ID to approved address mapping(uint256 => address) private _tokenApprovals; // Mapping from owner to operator approvals mapping(address => mapping(address => bool)) private _operatorApprovals; /** * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) { return interfaceId == type(IERC721).interfaceId || interfaceId == type(IERC721Metadata).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC721-balanceOf}. */ function balanceOf(address owner) public view virtual override returns (uint256) { require(owner != address(0), "ERC721: balance query for the zero address"); return _balances[owner]; } /** * @dev See {IERC721-ownerOf}. */ function ownerOf(uint256 tokenId) public view virtual override returns (address) { address owner = _owners[tokenId]; require(owner != address(0), "ERC721: owner query for nonexistent token"); return owner; } /** * @dev See {IERC721Metadata-name}. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev See {IERC721Metadata-symbol}. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev See {IERC721Metadata-tokenURI}. */ function tokenURI(uint256 tokenId) public view virtual override returns (string memory) { require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token"); string memory baseURI = _baseURI(); return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : ""; } /** * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each * token will be the concatenation of the `baseURI` and the `tokenId`. Empty * by default, can be 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 override { address owner = ERC721.ownerOf(tokenId); require(to != owner, "ERC721: approval to current owner"); require( _msgSender() == owner || isApprovedForAll(owner, _msgSender()), "ERC721: approve caller is not owner nor approved for all" ); _approve(to, tokenId); } /** * @dev See {IERC721-getApproved}. */ function getApproved(uint256 tokenId) public view virtual override returns (address) { require(_exists(tokenId), "ERC721: approved query for nonexistent token"); return _tokenApprovals[tokenId]; } /** * @dev See {IERC721-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public virtual override { _setApprovalForAll(_msgSender(), operator, approved); } /** * @dev See {IERC721-isApprovedForAll}. */ function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) { return _operatorApprovals[owner][operator]; } /** * @dev See {IERC721-transferFrom}. */ function transferFrom( address from, address to, uint256 tokenId ) public virtual override { //solhint-disable-next-line max-line-length require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _transfer(from, to, tokenId); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId ) public virtual override { safeTransferFrom(from, to, tokenId, ""); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes memory _data ) public virtual override { require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _safeTransfer(from, to, tokenId, _data); } /** * @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. * * `_data` is additional data, it has no specified format and it is sent in call to `to`. * * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g. * implement alternative mechanisms to perform token transfer, such as signature-based. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - 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, bytes memory _data ) internal virtual { _transfer(from, to, tokenId); require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer"); } /** * @dev Returns whether `tokenId` exists. * * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}. * * Tokens start existing when they are minted (`_mint`), * and stop existing when they are burned (`_burn`). */ function _exists(uint256 tokenId) internal view virtual returns (bool) { return _owners[tokenId] != address(0); } /** * @dev Returns whether `spender` is allowed to manage `tokenId`. * * Requirements: * * - `tokenId` must exist. */ function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) { require(_exists(tokenId), "ERC721: operator query for nonexistent token"); address owner = ERC721.ownerOf(tokenId); return (spender == owner || isApprovedForAll(owner, spender) || getApproved(tokenId) == spender); } /** * @dev Safely mints `tokenId` and transfers it to `to`. * * 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 virtual { _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); require( _checkOnERC721Received(address(0), to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer" ); } /** * @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 virtual { require(to != address(0), "ERC721: mint to the zero address"); require(!_exists(tokenId), "ERC721: token already minted"); _beforeTokenTransfer(address(0), to, tokenId); _balances[to] += 1; _owners[tokenId] = to; emit Transfer(address(0), to, tokenId); _afterTokenTransfer(address(0), to, tokenId); } /** * @dev Destroys `tokenId`. * The approval is cleared when the token is burned. * * Requirements: * * - `tokenId` must exist. * * Emits a {Transfer} event. */ function _burn(uint256 tokenId) internal virtual { address owner = ERC721.ownerOf(tokenId); _beforeTokenTransfer(owner, address(0), tokenId); // Clear approvals _approve(address(0), tokenId); _balances[owner] -= 1; delete _owners[tokenId]; emit Transfer(owner, address(0), tokenId); _afterTokenTransfer(owner, address(0), 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 virtual { require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner"); require(to != address(0), "ERC721: transfer to the zero address"); _beforeTokenTransfer(from, to, tokenId); // Clear approvals from the previous owner _approve(address(0), tokenId); _balances[from] -= 1; _balances[to] += 1; _owners[tokenId] = to; emit Transfer(from, to, tokenId); _afterTokenTransfer(from, to, tokenId); } /** * @dev Approve `to` to operate on `tokenId` * * Emits a {Approval} event. */ function _approve(address to, uint256 tokenId) internal virtual { _tokenApprovals[tokenId] = to; emit Approval(ERC721.ownerOf(tokenId), to, tokenId); } /** * @dev Approve `operator` to operate on all of `owner` tokens * * Emits a {ApprovalForAll} event. */ function _setApprovalForAll( address owner, address operator, bool approved ) internal virtual { require(owner != operator, "ERC721: approve to caller"); _operatorApprovals[owner][operator] = approved; emit ApprovalForAll(owner, operator, approved); } /** * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address. * 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 * @return bool whether the call correctly returned the expected magic value */ function _checkOnERC721Received( address from, address to, uint256 tokenId, bytes memory _data ) private returns (bool) { if (to.isContract()) { try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) { return retval == IERC721Receiver.onERC721Received.selector; } catch (bytes memory reason) { if (reason.length == 0) { revert("ERC721: transfer to non ERC721Receiver implementer"); } else { assembly { revert(add(32, reason), mload(reason)) } } } } else { return true; } } /** * @dev Hook that is called before any token transfer. This includes minting * and burning. * * Calling conditions: * * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. * - When `to` is zero, ``from``'s `tokenId` will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 tokenId ) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 tokenId ) internal virtual {} }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721.sol) pragma solidity ^0.8.0; import "../../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 be have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol) pragma solidity ^0.8.0; /** * @title ERC721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC721 asset contracts. */ interface IERC721Receiver { /** * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} * by `operator` from `from`, this function is called. * * It must return its Solidity selector to confirm the token transfer. * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted. * * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`. */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol) pragma solidity ^0.8.0; import "../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); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Counters.sol) pragma solidity ^0.8.0; /** * @title Counters * @author Matt Condon (@shrugs) * @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number * of elements in a mapping, issuing ERC721 ids, or counting request ids. * * Include with `using Counters for Counters.Counter;` */ library Counters { struct Counter { // This variable should never be directly accessed by users of the library: interactions must be restricted to // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add // this feature: see https://github.com/ethereum/solidity/issues/4637 uint256 _value; // default: 0 } function current(Counter storage counter) internal view returns (uint256) { return counter._value; } function increment(Counter storage counter) internal { unchecked { counter._value += 1; } } function decrement(Counter storage counter) internal { uint256 value = counter._value; require(value > 0, "Counter: decrement overflow"); unchecked { counter._value = value - 1; } } function reset(Counter storage counter) internal { counter._value = 0; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Strings.sol) pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); while (value != 0) { digits -= 1; buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); value /= 10; } return string(buffer); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0x00"; } uint256 temp = value; uint256 length = 0; while (temp != 0) { length++; temp >>= 8; } return toHexString(value, length); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _HEX_SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (utils/cryptography/MerkleProof.sol) pragma solidity ^0.8.0; /** * @dev These functions deal with verification of Merkle Trees proofs. * * The proofs can be generated using the JavaScript library * https://github.com/miguelmota/merkletreejs[merkletreejs]. * Note: the hashing algorithm should be keccak256 and pair sorting should be enabled. * * See `test/utils/cryptography/MerkleProof.test.js` for some examples. * * WARNING: You should avoid using leaf values that are 64 bytes long prior to * hashing, or use a hash function other than keccak256 for hashing leaves. * This is because the concatenation of a sorted pair of internal nodes in * the merkle tree could be reinterpreted as a leaf value. */ library MerkleProof { /** * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree * defined by `root`. For this, a `proof` must be provided, containing * sibling hashes on the branch from the leaf to the root of the tree. Each * pair of leaves and each pair of pre-images are assumed to be sorted. */ function verify( bytes32[] memory proof, bytes32 root, bytes32 leaf ) internal pure returns (bool) { return processProof(proof, leaf) == root; } /** * @dev Returns the rebuilt hash obtained by traversing a Merkle tree up * from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt * hash matches the root of the tree. When processing the proof, the pairs * of leafs & pre-images are assumed to be sorted. * * _Available since v4.4._ */ function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) { bytes32 computedHash = leaf; for (uint256 i = 0; i < proof.length; i++) { bytes32 proofElement = proof[i]; if (computedHash <= proofElement) { // Hash(current computed hash + current element of the proof) computedHash = _efficientHash(computedHash, proofElement); } else { // Hash(current element of the proof + current computed hash) computedHash = _efficientHash(proofElement, computedHash); } } return computedHash; } function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) { assembly { mstore(0x00, a) mstore(0x20, b) value := keccak256(0x00, 0x40) } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; import "./IERC165.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165Storage.sol) pragma solidity ^0.8.0; import "./ERC165.sol"; /** * @dev Storage based implementation of the {IERC165} interface. * * Contracts may inherit from this and call {_registerInterface} to declare * their support of an interface. */ abstract contract ERC165Storage is ERC165 { /** * @dev Mapping of interface ids to whether or not it's supported. */ mapping(bytes4 => bool) private _supportedInterfaces; /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return super.supportsInterface(interfaceId) || _supportedInterfaces[interfaceId]; } /** * @dev Registers the contract as an implementer of the interface defined by * `interfaceId`. Support of the actual ERC165 interface is automatic and * registering its interface id is not required. * * See {IERC165-supportsInterface}. * * Requirements: * * - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`). */ function _registerInterface(bytes4 interfaceId) internal virtual { require(interfaceId != 0xffffffff, "ERC165: invalid interface id"); _supportedInterfaces[interfaceId] = true; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (utils/math/SafeMath.sol) pragma solidity ^0.8.0; // CAUTION // This version of SafeMath should only be used with Solidity 0.8 or later, // because it relies on the compiler's built in overflow checks. /** * @dev Wrappers over Solidity's arithmetic operations. * * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler * now has built in overflow checking. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ 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. * * _Available since v3.4._ */ 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. * * _Available since v3.4._ */ 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. * * _Available since v3.4._ */ 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. * * _Available since v3.4._ */ 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 addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { return a + b; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return a - b; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { return a * b; } /** * @dev Returns the integer division of two unsigned integers, reverting on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return a / b; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return a % b; } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {trySub}. * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b <= a, errorMessage); return a - b; } } /** * @dev Returns the integer division of two unsigned integers, reverting with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b > 0, errorMessage); return a / b; } } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting with custom message when dividing by zero. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryMod}. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b > 0, errorMessage); return a % b; } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/structs/BitMaps.sol) pragma solidity ^0.8.0; /** * @dev Library for managing uint256 to bool mapping in a compact and efficient way, providing the keys are sequential. * Largelly inspired by Uniswap's https://github.com/Uniswap/merkle-distributor/blob/master/contracts/MerkleDistributor.sol[merkle-distributor]. */ library BitMaps { struct BitMap { mapping(uint256 => uint256) _data; } /** * @dev Returns whether the bit at `index` is set. */ function get(BitMap storage bitmap, uint256 index) internal view returns (bool) { uint256 bucket = index >> 8; uint256 mask = 1 << (index & 0xff); return bitmap._data[bucket] & mask != 0; } /** * @dev Sets the bit at `index` to the boolean `value`. */ function setTo( BitMap storage bitmap, uint256 index, bool value ) internal { if (value) { set(bitmap, index); } else { unset(bitmap, index); } } /** * @dev Sets the bit at `index`. */ function set(BitMap storage bitmap, uint256 index) internal { uint256 bucket = index >> 8; uint256 mask = 1 << (index & 0xff); bitmap._data[bucket] |= mask; } /** * @dev Unsets the bit at `index`. */ function unset(BitMap storage bitmap, uint256 index) internal { uint256 bucket = index >> 8; uint256 mask = 1 << (index & 0xff); bitmap._data[bucket] &= ~mask; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (utils/structs/EnumerableSet.sol) pragma solidity ^0.8.0; /** * @dev Library for managing * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive * types. * * Sets have the following properties: * * - Elements are added, removed, and checked for existence in constant time * (O(1)). * - Elements are enumerated in O(n). No guarantees are made on the ordering. * * ``` * contract Example { * // Add the library methods * using EnumerableSet for EnumerableSet.AddressSet; * * // Declare a set state variable * EnumerableSet.AddressSet private mySet; * } * ``` * * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`) * and `uint256` (`UintSet`) are supported. */ library EnumerableSet { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping(bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; if (lastIndex != toDeleteIndex) { bytes32 lastValue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastValue; // Update the index for the moved value set._indexes[lastValue] = valueIndex; // Replace lastValue's index to valueIndex } // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { return set._values[index]; } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function _values(Set storage set) private view returns (bytes32[] memory) { return set._values; } // Bytes32Set struct Bytes32Set { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _add(set._inner, value); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _remove(set._inner, value); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) { return _contains(set._inner, value); } /** * @dev Returns the number of values in the set. O(1). */ function length(Bytes32Set storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) { return _at(set._inner, index); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(Bytes32Set storage set) internal view returns (bytes32[] memory) { return _values(set._inner); } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint160(uint256(_at(set._inner, index)))); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(AddressSet storage set) internal view returns (address[] memory) { bytes32[] memory store = _values(set._inner); address[] memory result; assembly { result := store } return result; } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values on the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(UintSet storage set) internal view returns (uint256[] memory) { bytes32[] memory store = _values(set._inner); uint256[] memory result; assembly { result := store } return result; } }
// SPDX-License-Identifier: AGPL-3.0 pragma solidity 0.8.9; import "@openzeppelin/contracts/proxy/utils/Initializable.sol"; import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/utils/math/SafeMath.sol"; import "@openzeppelin/contracts/token/ERC721/ERC721.sol"; import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol"; import "./ERC721CollectionMetadataExtension.sol"; interface IERC721AutoIdMinterExtension { function setMaxSupply(uint256 newValue) external; function freezeMaxSupply() external; function totalSupply() external view returns (uint256); } /** * @dev Extension to add minting capability with an auto incremented ID for each token and a maximum supply setting. */ abstract contract ERC721AutoIdMinterExtension is IERC721AutoIdMinterExtension, ERC721CollectionMetadataExtension { using SafeMath for uint256; uint256 public maxSupply; bool public maxSupplyFrozen; uint256 internal _currentTokenId = 0; function __ERC721AutoIdMinterExtension_init(uint256 _maxSupply) internal onlyInitializing { __ERC721AutoIdMinterExtension_init_unchained(_maxSupply); } function __ERC721AutoIdMinterExtension_init_unchained(uint256 _maxSupply) internal onlyInitializing { maxSupply = _maxSupply; _registerInterface(type(IERC721AutoIdMinterExtension).interfaceId); _registerInterface(type(IERC721).interfaceId); } /* ADMIN */ function setMaxSupply(uint256 newValue) public virtual override onlyOwner { require(!maxSupplyFrozen, "FROZEN"); require(newValue >= totalSupply(), "LOWER_THAN_SUPPLY"); maxSupply = newValue; } function freezeMaxSupply() external onlyOwner { maxSupplyFrozen = true; } /* PUBLIC */ function totalSupply() public view returns (uint256) { return _currentTokenId; } /* INTERNAL */ function _mintTo(address to, uint256 count) internal { require(totalSupply() + count <= maxSupply, "EXCEEDS_SUPPLY"); for (uint256 i = 0; i < count; i++) { uint256 newTokenId = _currentTokenId; _safeMint(to, newTokenId); _incrementTokenId(); } } /** * Increments the value of _currentTokenId */ function _incrementTokenId() internal { _currentTokenId++; } }
// SPDX-License-Identifier: AGPL-3.0 pragma solidity 0.8.9; import "@openzeppelin/contracts/proxy/utils/Initializable.sol"; import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/proxy/utils/Initializable.sol"; import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol"; import "@openzeppelin/contracts/token/ERC721/ERC721.sol"; import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol"; interface IERC721CollectionMetadataExtension { function setContractURI(string memory newValue) external; function contractURI() external view returns (string memory); } /** * @dev Extension to allow configuring contract-level collection metadata URI. */ abstract contract ERC721CollectionMetadataExtension is Initializable, Ownable, ERC165Storage, ERC721 { string private _name; string private _symbol; string private _contractURI; function __ERC721CollectionMetadataExtension_init( string memory name_, string memory symbol_, string memory contractURI_ ) internal onlyInitializing { __ERC721CollectionMetadataExtension_init_unchained( name_, symbol_, contractURI_ ); } function __ERC721CollectionMetadataExtension_init_unchained( string memory name_, string memory symbol_, string memory contractURI_ ) internal onlyInitializing { _name = name_; _symbol = symbol_; _contractURI = contractURI_; _registerInterface( type(IERC721CollectionMetadataExtension).interfaceId ); _registerInterface(type(IERC721).interfaceId); _registerInterface(type(IERC721Metadata).interfaceId); } /* ADMIN */ function setContractURI(string memory newValue) external onlyOwner { _contractURI = newValue; } /* PUBLIC */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165Storage, ERC721) returns (bool) { return ERC165Storage.supportsInterface(interfaceId); } function name() public view virtual override returns (string memory) { return _name; } function symbol() public view virtual override returns (string memory) { return _symbol; } function contractURI() public view returns (string memory) { return _contractURI; } }
// SPDX-License-Identifier: AGPL-3.0 pragma solidity 0.8.9; import "@openzeppelin/contracts/proxy/utils/Initializable.sol"; import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol"; import "./ERC721AutoIdMinterExtension.sol"; interface IERC721OwnerMintExtension { function mintByOwner(address to, uint256 count) external; } /** * @dev Extension to allow owner to mint directly without paying. */ abstract contract ERC721OwnerMintExtension is IERC721OwnerMintExtension, Initializable, Ownable, ERC165Storage, ERC721AutoIdMinterExtension { function __ERC721OwnerMintExtension_init() internal onlyInitializing { __ERC721OwnerMintExtension_init_unchained(); } function __ERC721OwnerMintExtension_init_unchained() internal onlyInitializing { _registerInterface(type(IERC721OwnerMintExtension).interfaceId); } /* ADMIN */ function mintByOwner(address to, uint256 count) external onlyOwner { _mintTo(to, count); } /* PUBLIC */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165Storage, ERC721CollectionMetadataExtension) returns (bool) { return ERC165Storage.supportsInterface(interfaceId); } }
// SPDX-License-Identifier: AGPL-3.0 pragma solidity 0.8.9; import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/proxy/utils/Initializable.sol"; import "@openzeppelin/contracts/utils/Strings.sol"; import "@openzeppelin/contracts/token/ERC721/ERC721.sol"; import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol"; import "./ERC721CollectionMetadataExtension.sol"; interface IERC721PrefixedMetadataExtension { function setPlaceholderURI(string memory newValue) external; function setTokenURIPrefix(string memory newValue) external; function setTokenURISuffix(string memory newValue) external; function placeholderURI() external view returns (string memory); function tokenURIPrefix() external view returns (string memory); function tokenURISuffix() external view returns (string memory); function tokenURI(uint256 _tokenId) external view returns (string memory); function freezeTokenURI() external; } /** * @dev Extension to allow configuring tokens metadata URI. * In this extension tokens will have a shared token URI prefix, * therefore on tokenURI() token's ID will be appended to the base URI. * It also allows configuring a fallback "placeholder" URI when prefix is not set yet. */ abstract contract ERC721PrefixedMetadataExtension is IERC721PrefixedMetadataExtension, Initializable, Ownable, ERC165Storage, ERC721 { string internal _placeholderURI; string internal _tokenURIPrefix; string internal _tokenURISuffix; bool public tokenURIFrozen; function __ERC721PrefixedMetadataExtension_init( string memory placeholderURI_, string memory tokenURIPrefix_ ) internal onlyInitializing { __ERC721PrefixedMetadataExtension_init_unchained( placeholderURI_, tokenURIPrefix_ ); } function __ERC721PrefixedMetadataExtension_init_unchained( string memory placeholderURI_, string memory tokenURIPrefix_ ) internal onlyInitializing { _placeholderURI = placeholderURI_; _tokenURIPrefix = tokenURIPrefix_; _tokenURISuffix = ".json"; _registerInterface(type(IERC721PrefixedMetadataExtension).interfaceId); _registerInterface(type(IERC721Metadata).interfaceId); } /* ADMIN */ function setPlaceholderURI(string memory newValue) external onlyOwner { _placeholderURI = newValue; } function setTokenURIPrefix(string memory newValue) external onlyOwner { require(!tokenURIFrozen, "FROZEN"); _tokenURIPrefix = newValue; } function setTokenURISuffix(string memory newValue) external onlyOwner { require(!tokenURIFrozen, "FROZEN"); _tokenURISuffix = newValue; } function freezeTokenURI() external onlyOwner { tokenURIFrozen = true; } /* PUBLIC */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165Storage, ERC721) returns (bool) { return ERC165Storage.supportsInterface(interfaceId); } function placeholderURI() public view returns (string memory) { return _placeholderURI; } function tokenURIPrefix() public view returns (string memory) { return _tokenURIPrefix; } function tokenURISuffix() public view returns (string memory) { return _tokenURISuffix; } function tokenURI(uint256 _tokenId) public view virtual override(ERC721, IERC721PrefixedMetadataExtension) returns (string memory) { return bytes(_tokenURIPrefix).length > 0 ? string( abi.encodePacked( _tokenURIPrefix, Strings.toString(_tokenId), _tokenURISuffix ) ) : _placeholderURI; } }
// SPDX-License-Identifier: AGPL-3.0 pragma solidity 0.8.9; import "@openzeppelin/contracts/access/AccessControl.sol"; import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol"; import "./ERC721AutoIdMinterExtension.sol"; interface IERC721RoleBasedMintExtension { function mintByRole(address to, uint256 count) external; } /** * @dev Extension to allow holders of a OpenZepplin-based role to mint directly. */ abstract contract ERC721RoleBasedMintExtension is IERC721RoleBasedMintExtension, Initializable, ERC165Storage, ERC721AutoIdMinterExtension, AccessControl { bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE"); function __ERC721RoleBasedMintExtension_init(address minter) internal onlyInitializing { __ERC721RoleBasedMintExtension_init_unchained(minter); } function __ERC721RoleBasedMintExtension_init_unchained(address minter) internal onlyInitializing { _registerInterface(type(IERC721RoleBasedMintExtension).interfaceId); _setupRole(MINTER_ROLE, minter); } /* ADMIN */ function mintByRole(address to, uint256 count) external { require(hasRole(MINTER_ROLE, _msgSender()), "NOT_MINTER_ROLE"); _mintTo(to, count); } /* PUBLIC */ function supportsInterface(bytes4 interfaceId) public view virtual override( ERC165Storage, AccessControl, ERC721CollectionMetadataExtension ) returns (bool) { return ERC165Storage.supportsInterface(interfaceId); } }
// SPDX-License-Identifier: AGPL-3.0 pragma solidity 0.8.9; import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/proxy/utils/Initializable.sol"; import "@manifoldxyz/royalty-registry-solidity/contracts/overrides/IRoyaltyOverride.sol"; import "@manifoldxyz/royalty-registry-solidity/contracts/overrides/RoyaltyOverrideCore.sol"; import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol"; import "../../../misc/rarible/IRoyalties.sol"; import "../../../misc/rarible/LibPart.sol"; import "../../../misc/rarible/LibRoyaltiesV2.sol"; interface IERC721RoyaltyExtension { function setTokenRoyalties( IEIP2981RoyaltyOverride.TokenRoyaltyConfig[] calldata royaltyConfigs ) external; function setDefaultRoyalty( IEIP2981RoyaltyOverride.TokenRoyalty calldata royalty ) external; function getRaribleV2Royalties(uint256 id) external view returns (LibPart.Part[] memory result); } /** * @dev Extension to signal configured royalty to famous marketplaces as well as ERC2981. * * This extension currently supports Standard ERC2981, Rarible. * Note that OpenSea is supported via Flair metadata feature. */ abstract contract ERC721RoyaltyExtension is IERC721RoyaltyExtension, IRoyalties, Initializable, Ownable, ERC165Storage, EIP2981RoyaltyOverrideCore { function __ERC721RoyaltyExtension_init( address defaultRoyaltyReceiver, uint16 defaultRoyaltyBps ) internal onlyInitializing { __ERC721RoyaltyExtension_init_unchained( defaultRoyaltyReceiver, defaultRoyaltyBps ); } function __ERC721RoyaltyExtension_init_unchained( address defaultRoyaltyReceiver, uint16 defaultRoyaltyBps ) internal onlyInitializing { _registerInterface(type(IERC721RoyaltyExtension).interfaceId); _registerInterface(type(IEIP2981).interfaceId); _registerInterface(type(IEIP2981RoyaltyOverride).interfaceId); _registerInterface(LibRoyaltiesV2._INTERFACE_ID_ROYALTIES); TokenRoyalty memory royalty = TokenRoyalty( defaultRoyaltyReceiver, defaultRoyaltyBps ); _setDefaultRoyalty(royalty); } function setTokenRoyalties(TokenRoyaltyConfig[] calldata royaltyConfigs) external override(IEIP2981RoyaltyOverride, IERC721RoyaltyExtension) onlyOwner { _setTokenRoyalties(royaltyConfigs); } function setDefaultRoyalty(TokenRoyalty calldata royalty) external override(IEIP2981RoyaltyOverride, IERC721RoyaltyExtension) onlyOwner { _setDefaultRoyalty(royalty); } function getRaribleV2Royalties(uint256 id) external view override(IRoyalties, IERC721RoyaltyExtension) returns (LibPart.Part[] memory result) { result = new LibPart.Part[](1); result[0].account = payable(defaultRoyalty.recipient); result[0].value = defaultRoyalty.bps; id; // avoid unused param warning } /* PUBLIC */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165Storage, EIP2981RoyaltyOverrideCore) returns (bool) { return ERC165Storage.supportsInterface(interfaceId); } }
// SPDX-License-Identifier: AGPL-3.0 pragma solidity 0.8.9; import "@openzeppelin/contracts/proxy/utils/Initializable.sol"; import "@openzeppelin/contracts/security/ReentrancyGuard.sol"; import "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol"; import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol"; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import "./ERC721AutoIdMinterExtension.sol"; interface IERC721TieringExtension { struct Tier { uint256 start; uint256 end; address currency; uint256 price; uint256 maxPerWallet; bytes32 merkleRoot; uint256 reserved; uint256 maxAllocation; } function onTierAllowlist( uint256 tierId, address minter, uint256 maxAllowance, bytes32[] calldata proof ) external view returns (bool); function eligibleForTier( uint256 tierId, address minter, uint256 maxAllowance, bytes32[] calldata proof ) external view returns (uint256); function mintByTier( uint256 tierId, uint256 count, uint256 maxAllowance, bytes32[] calldata proof ) external payable; } /** * @dev Extension to allow multiple tiers for minting, * you can configure, different minting window, price, currency, max per wallet, and allowlist per tier. */ abstract contract ERC721TieringExtension is IERC721TieringExtension, Initializable, Ownable, ERC721AutoIdMinterExtension, ReentrancyGuard { mapping(uint256 => Tier) public tiers; uint256 public totalReserved; mapping(uint256 => uint256) public tierMints; mapping(uint256 => mapping(address => uint256)) public walletMinted; uint256 public reservedMints; function __ERC721TieringExtension_init(Tier[] memory _tiers) internal onlyInitializing { __ERC721TieringExtension_init_unchained(_tiers); } function __ERC721TieringExtension_init_unchained(Tier[] memory _tiers) internal onlyInitializing { _registerInterface(type(IERC721TieringExtension).interfaceId); for (uint256 i = 0; i < _tiers.length; i++) { tiers[i] = _tiers[i]; totalReserved += _tiers[i].reserved; } } /* ADMIN */ function configureTiering(uint256 tierId, Tier calldata tier) public onlyOwner { require(tier.maxAllocation >= tierMints[tierId], "LOWER_THAN_MINTED"); if (tiers[tierId].reserved > 0) { require(tier.reserved >= tierMints[tierId], "LOW_RESERVE_AMOUNT"); } if (tierMints[tierId] > 0) { require( tier.maxPerWallet >= tiers[tierId].maxPerWallet, "LOW_MAX_PER_WALLET" ); } totalReserved -= tiers[tierId].reserved; tiers[tierId] = tier; totalReserved += tier.reserved; require(totalReserved <= maxSupply, "MAX_SUPPLY_EXCEEDED"); } function configureTiering( uint256[] calldata _tierIds, Tier[] calldata _tiers ) public onlyOwner { for (uint256 i = 0; i < _tierIds.length; i++) { configureTiering(_tierIds[i], _tiers[i]); } } /* PUBLIC */ function setMaxSupply(uint256 newValue) public virtual override(ERC721AutoIdMinterExtension) onlyOwner { ERC721AutoIdMinterExtension.setMaxSupply(newValue); require( newValue - totalSupply() >= totalReserved - reservedMints, "LOWER_THAN_RESERVED" ); } function onTierAllowlist( uint256 tierId, address minter, uint256 maxAllowance, bytes32[] calldata proof ) public view returns (bool) { return MerkleProof.verify( proof, tiers[tierId].merkleRoot, _generateMerkleLeaf(minter, maxAllowance) ); } function eligibleForTier( uint256 tierId, address minter, uint256 maxAllowance, bytes32[] calldata proof ) public view returns (uint256 maxMintable) { require(tiers[tierId].maxPerWallet > 0, "NOT_EXISTS"); require(block.timestamp >= tiers[tierId].start, "NOT_STARTED"); require(block.timestamp <= tiers[tierId].end, "ALREADY_ENDED"); maxMintable = tiers[tierId].maxPerWallet - walletMinted[tierId][minter]; if (tiers[tierId].merkleRoot != bytes32(0)) { require( walletMinted[tierId][minter] < maxAllowance, "MAXED_ALLOWANCE" ); require( onTierAllowlist(tierId, minter, maxAllowance, proof), "NOT_ALLOWLISTED" ); uint256 remainingAllowance = maxAllowance - walletMinted[tierId][minter]; if (maxMintable > remainingAllowance) { maxMintable = remainingAllowance; } } } function mintByTier( uint256 tierId, uint256 count, uint256 maxAllowance, bytes32[] calldata proof ) external payable nonReentrant { address minter = _msgSender(); uint256 maxMintable = eligibleForTier( tierId, minter, maxAllowance, proof ); require(count <= maxMintable, "EXCEEDS_MAX"); require(count <= remainingForTier(tierId), "EXCEEDS_ALLOCATION"); require( count + tierMints[tierId] <= tiers[tierId].maxAllocation, "EXCEEDS_ALLOCATION" ); if (tiers[tierId].currency == address(0)) { require( tiers[tierId].price * count <= msg.value, "INSUFFICIENT_AMOUNT" ); } else { IERC20(tiers[tierId].currency).transferFrom( minter, address(this), tiers[tierId].price * count ); } walletMinted[tierId][minter] += count; tierMints[tierId] += count; if (tiers[tierId].reserved > 0) { reservedMints += count; } _mintTo(minter, count); } function remainingForTier(uint256 tierId) public view returns (uint256 tierRemaining) { // Substract all the remaining reserved spots from the total remaining supply... tierRemaining = (maxSupply - totalSupply()) - (totalReserved - reservedMints); // If this tier has reserved spots, add remaining spots back to result... if (tiers[tierId].reserved > 0) { tierRemaining += (tiers[tierId].reserved - tierMints[tierId]); } } function walletMintedByTier(uint256 tierId, address wallet) public view returns (uint256) { return walletMinted[tierId][wallet]; } /* PRIVATE */ function _generateMerkleLeaf(address account, uint256 maxAllowance) private pure returns (bytes32) { return keccak256(abi.encodePacked(account, maxAllowance)); } }
// SPDX-License-Identifier: AGPL-3.0 pragma solidity 0.8.9; import "@openzeppelin/contracts/proxy/utils/Initializable.sol"; import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/proxy/utils/Initializable.sol"; import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol"; import "@openzeppelin/contracts/token/ERC721/IERC721.sol"; import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol"; import "erc721a/contracts/ERC721A.sol"; import {IERC721CollectionMetadataExtension} from "../../ERC721/extensions/ERC721CollectionMetadataExtension.sol"; /** * @dev Extension to allow configuring contract-level collection metadata URI. */ abstract contract ERC721ACollectionMetadataExtension is IERC721CollectionMetadataExtension, Initializable, Ownable, ERC165Storage, ERC721A { string private _name; string private _symbol; string private _contractURI; function __ERC721ACollectionMetadataExtension_init( string memory name_, string memory symbol_, string memory contractURI_ ) internal onlyInitializing { __ERC721ACollectionMetadataExtension_init_unchained( name_, symbol_, contractURI_ ); } function __ERC721ACollectionMetadataExtension_init_unchained( string memory name_, string memory symbol_, string memory contractURI_ ) internal onlyInitializing { _name = name_; _symbol = symbol_; _contractURI = contractURI_; _registerInterface( type(IERC721CollectionMetadataExtension).interfaceId ); _registerInterface(type(IERC721).interfaceId); _registerInterface(type(IERC721A).interfaceId); _registerInterface(type(IERC721Metadata).interfaceId); } /* ADMIN */ function setContractURI(string memory newValue) external onlyOwner { _contractURI = newValue; } /* PUBLIC */ function name() public view virtual override returns (string memory) { return _name; } function symbol() public view virtual override returns (string memory) { return _symbol; } function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165Storage, ERC721A) returns (bool) { return ERC165Storage.supportsInterface(interfaceId); } function contractURI() public view returns (string memory) { return _contractURI; } }
// SPDX-License-Identifier: AGPL-3.0 pragma solidity ^0.8.9; import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol"; import "@openzeppelin/contracts/utils/structs/BitMaps.sol"; import "@openzeppelin/contracts/security/ReentrancyGuard.sol"; import "./ERC721AMinterExtension.sol"; interface IERC721ALockableExtension { function locked(uint256 tokenId) external view returns (bool); function lock(uint256 tokenId) external; function lock(uint256[] calldata tokenIds) external; function unlock(uint256 tokenId) external; function unlock(uint256[] calldata tokenIds) external; } /** * @dev Extension to allow locking NFTs, for use-cases like staking, without leaving holders wallet. */ abstract contract ERC721ALockableExtension is IERC721ALockableExtension, Initializable, ERC165Storage, ERC721AMinterExtension, ReentrancyGuard { using BitMaps for BitMaps.BitMap; BitMaps.BitMap internal lockedTokens; function __ERC721ALockableExtension_init() internal onlyInitializing { __ERC721ALockableExtension_init_unchained(); } function __ERC721ALockableExtension_init_unchained() internal onlyInitializing { _registerInterface(type(IERC721ALockableExtension).interfaceId); } // PUBLIC function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165Storage, ERC721ACollectionMetadataExtension) returns (bool) { return ERC165Storage.supportsInterface(interfaceId); } /** * At this moment staking is only possible from a certain address (usually a smart contract). * * This is because in almost all cases you want another contract to perform custom logic on lock and unlock operations, * without allowing users to directly unlock their tokens and sell them, for example. */ function _lock(uint256 tokenId) internal virtual { require(!lockedTokens.get(tokenId), "LOCKED"); lockedTokens.set(tokenId); } function _unlock(uint256 tokenId) internal virtual { require(lockedTokens.get(tokenId), "NOT_LOCKED"); lockedTokens.unset(tokenId); } /** * Returns if a token is locked or not. */ function locked(uint256 tokenId) public view virtual returns (bool) { return lockedTokens.get(tokenId); } function filterUnlocked(uint256[] calldata ticketTokenIds) public view returns (uint256[] memory) { uint256[] memory unlocked = new uint256[](ticketTokenIds.length); for (uint256 i = 0; i < ticketTokenIds.length; i++) { if (!locked(ticketTokenIds[i])) { unlocked[i] = ticketTokenIds[i]; } } return unlocked; } function _beforeTokenTransfers( address from, address to, uint256 startTokenId, uint256 quantity ) internal virtual override(ERC721A) { require( // We are not checking the quantity because it is only used during mint where users cannot stake/unstake. !lockedTokens.get(startTokenId), "LOCKED" ); super._beforeTokenTransfers(from, to, startTokenId, quantity); } }
// SPDX-License-Identifier: AGPL-3.0 pragma solidity 0.8.9; import "@openzeppelin/contracts/proxy/utils/Initializable.sol"; import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/token/ERC721/IERC721.sol"; import "@openzeppelin/contracts/utils/math/SafeMath.sol"; import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol"; import "erc721a/contracts/ERC721A.sol"; import {IERC721AutoIdMinterExtension} from "../../ERC721/extensions/ERC721AutoIdMinterExtension.sol"; import "./ERC721ACollectionMetadataExtension.sol"; /** * @dev Extension to add minting capability with an auto incremented ID for each token and a maximum supply setting. */ abstract contract ERC721AMinterExtension is ERC721ACollectionMetadataExtension { using SafeMath for uint256; uint256 public maxSupply; bool public maxSupplyFrozen; function __ERC721AMinterExtension_init(uint256 _maxSupply) internal onlyInitializing { __ERC721AMinterExtension_init_unchained(_maxSupply); } function __ERC721AMinterExtension_init_unchained(uint256 _maxSupply) internal onlyInitializing { maxSupply = _maxSupply; _registerInterface(type(IERC721AutoIdMinterExtension).interfaceId); _registerInterface(type(IERC721).interfaceId); _registerInterface(type(IERC721A).interfaceId); } /* ADMIN */ function setMaxSupply(uint256 newValue) public virtual onlyOwner { require(!maxSupplyFrozen, "BASE_URI_FROZEN"); require(newValue >= totalSupply(), "LOWER_THAN_SUPPLY"); maxSupply = newValue; } function freezeMaxSupply() external onlyOwner { maxSupplyFrozen = true; } /* INTERNAL */ function _mintTo(address to, uint256 count) internal { require(totalSupply() + count <= maxSupply, "EXCEEDS_SUPPLY"); _safeMint(to, count); } }
// SPDX-License-Identifier: AGPL-3.0 pragma solidity 0.8.9; import "@openzeppelin/contracts/proxy/utils/Initializable.sol"; import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol"; import "./ERC721AMinterExtension.sol"; import {IERC721OwnerMintExtension} from "../../ERC721/extensions/ERC721OwnerMintExtension.sol"; /** * @dev Extension to allow owner to mint directly without paying. */ abstract contract ERC721AOwnerMintExtension is IERC721OwnerMintExtension, Initializable, Ownable, ERC165Storage, ERC721AMinterExtension { function __ERC721AOwnerMintExtension_init() internal onlyInitializing { __ERC721AOwnerMintExtension_init_unchained(); } function __ERC721AOwnerMintExtension_init_unchained() internal onlyInitializing { _registerInterface(type(IERC721OwnerMintExtension).interfaceId); } /* ADMIN */ function mintByOwner(address to, uint256 count) external onlyOwner { _mintTo(to, count); } /* PUBLIC */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165Storage, ERC721ACollectionMetadataExtension) returns (bool) { return ERC165Storage.supportsInterface(interfaceId); } }
// SPDX-License-Identifier: AGPL-3.0 pragma solidity 0.8.9; import "@openzeppelin/contracts/proxy/utils/Initializable.sol"; import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/utils/Strings.sol"; import "@openzeppelin/contracts/token/ERC721/ERC721.sol"; import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol"; import "erc721a/contracts/ERC721A.sol"; import {IERC721PrefixedMetadataExtension} from "../../ERC721/extensions/ERC721PrefixedMetadataExtension.sol"; /** * @dev Extension to allow configuring tokens metadata URI. * In this extension tokens will have a shared token URI prefix, * therefore on tokenURI() token's ID will be appended to the base URI. * It also allows configuring a fallback "placeholder" URI when prefix is not set yet. */ abstract contract ERC721APrefixedMetadataExtension is IERC721PrefixedMetadataExtension, Initializable, Ownable, ERC165Storage, ERC721A { string internal _placeholderURI; string internal _tokenURIPrefix; string internal _tokenURISuffix; bool public tokenURIFrozen; function __ERC721APrefixedMetadataExtension_init( string memory placeholderURI_, string memory tokenURIPrefix_ ) internal onlyInitializing { __ERC721APrefixedMetadataExtension_init_unchained( placeholderURI_, tokenURIPrefix_ ); } function __ERC721APrefixedMetadataExtension_init_unchained( string memory placeholderURI_, string memory tokenURIPrefix_ ) internal onlyInitializing { _placeholderURI = placeholderURI_; _tokenURIPrefix = tokenURIPrefix_; _tokenURISuffix = ".json"; _registerInterface(type(IERC721PrefixedMetadataExtension).interfaceId); _registerInterface(type(IERC721Metadata).interfaceId); } /* ADMIN */ function setPlaceholderURI(string memory newValue) external onlyOwner { _placeholderURI = newValue; } function setTokenURIPrefix(string memory newValue) external onlyOwner { require(!tokenURIFrozen, "FROZEN"); _tokenURIPrefix = newValue; } function setTokenURISuffix(string memory newValue) external onlyOwner { require(!tokenURIFrozen, "FROZEN"); _tokenURISuffix = newValue; } function freezeTokenURI() external onlyOwner { tokenURIFrozen = true; } /* PUBLIC */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165Storage, ERC721A) returns (bool) { return ERC165Storage.supportsInterface(interfaceId); } function placeholderURI() public view returns (string memory) { return _placeholderURI; } function tokenURIPrefix() public view returns (string memory) { return _tokenURIPrefix; } function tokenURISuffix() public view returns (string memory) { return _tokenURISuffix; } function tokenURI(uint256 _tokenId) public view virtual override(ERC721A, IERC721PrefixedMetadataExtension) returns (string memory) { return bytes(_tokenURIPrefix).length > 0 ? string( abi.encodePacked( _tokenURIPrefix, Strings.toString(_tokenId), _tokenURISuffix ) ) : _placeholderURI; } }
// SPDX-License-Identifier: AGPL-3.0 pragma solidity ^0.8.9; import "@openzeppelin/contracts/access/AccessControl.sol"; import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol"; import "@openzeppelin/contracts/utils/structs/BitMaps.sol"; import "@openzeppelin/contracts/security/ReentrancyGuard.sol"; import "./ERC721ALockableExtension.sol"; interface IERC721ARoleBasedLockableExtension { function hasRoleBasedLockableExtension() external view returns (bool); } /** * @dev Extension to allow locking NFTs, for use-cases like staking, without leaving holders wallet, using roles. */ abstract contract ERC721ARoleBasedLockableExtension is IERC721ARoleBasedLockableExtension, ERC721ALockableExtension, AccessControl { using BitMaps for BitMaps.BitMap; bytes32 public constant LOCKER_ROLE = keccak256("LOCKER_ROLE"); function __ERC721ARoleBasedLockableExtension_init() internal onlyInitializing { __ERC721ARoleBasedLockableExtension_init_unchained(); } function __ERC721ARoleBasedLockableExtension_init_unchained() internal onlyInitializing { _registerInterface( type(IERC721ARoleBasedLockableExtension).interfaceId ); } // ADMIN /** * Locks token(s) to effectively lock them, while keeping in the same wallet. * This mechanism prevents them from being transferred, yet still will show correct owner. */ function lock(uint256 tokenId) public virtual nonReentrant { require(hasRole(LOCKER_ROLE, msg.sender), "NOT_LOCKER_ROLE"); _lock(tokenId); } function lock(uint256[] calldata tokenIds) public virtual nonReentrant { require(hasRole(LOCKER_ROLE, msg.sender), "STAKABLE_NOT_LOCKER_ROLE"); for (uint256 i = 0; i < tokenIds.length; i++) { _lock(tokenIds[i]); } } /** * Unlocks locked token(s) to be able to transfer. */ function unlock(uint256 tokenId) public virtual nonReentrant { require(hasRole(LOCKER_ROLE, msg.sender), "NOT_LOCKER_ROLE"); _unlock(tokenId); } function unlock(uint256[] calldata tokenIds) public virtual nonReentrant { require(hasRole(LOCKER_ROLE, msg.sender), "STAKABLE_NOT_LOCKER_ROLE"); for (uint256 i = 0; i < tokenIds.length; i++) { _unlock(tokenIds[i]); } } // PUBLIC function hasRoleBasedLockableExtension() public view virtual returns (bool) { return true; } function supportsInterface(bytes4 interfaceId) public view virtual override(AccessControl, ERC721ALockableExtension) returns (bool) { return ERC165Storage.supportsInterface(interfaceId); } }
// SPDX-License-Identifier: AGPL-3.0 pragma solidity 0.8.9; import "@openzeppelin/contracts/access/AccessControl.sol"; import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol"; import "./ERC721AMinterExtension.sol"; import {IERC721RoleBasedMintExtension} from "../../ERC721/extensions/ERC721RoleBasedMintExtension.sol"; /** * @dev Extension to allow holders of a OpenZepplin-based role to mint directly. */ abstract contract ERC721ARoleBasedMintExtension is IERC721RoleBasedMintExtension, ERC165Storage, ERC721AMinterExtension, AccessControl { bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE"); function __ERC721ARoleBasedMintExtension_init(address minter) internal onlyInitializing { __ERC721ARoleBasedMintExtension_init_unchained(minter); } function __ERC721ARoleBasedMintExtension_init_unchained(address minter) internal onlyInitializing { _registerInterface(type(IERC721RoleBasedMintExtension).interfaceId); _setupRole(MINTER_ROLE, minter); } /* ADMIN */ function mintByRole(address to, uint256 count) external { require(hasRole(MINTER_ROLE, _msgSender()), "NOT_MINTER_ROLE"); _mintTo(to, count); } /* PUBLIC */ function supportsInterface(bytes4 interfaceId) public view virtual override( ERC165Storage, AccessControl, ERC721ACollectionMetadataExtension ) returns (bool) { return ERC165Storage.supportsInterface(interfaceId); } }
// SPDX-License-Identifier: AGPL-3.0 pragma solidity 0.8.9; import "@openzeppelin/contracts/proxy/utils/Initializable.sol"; import "@openzeppelin/contracts/security/ReentrancyGuard.sol"; import "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol"; import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol"; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import "./ERC721AMinterExtension.sol"; import {IERC721TieringExtension} from "../../ERC721/extensions/ERC721TieringExtension.sol"; /** * @dev Extension to allow multiple tiers for minting, * you can configure, different minting window, price, currency, max per wallet, and allowlist per tier. */ abstract contract ERC721ATieringExtension is IERC721TieringExtension, Initializable, Ownable, ERC721AMinterExtension, ReentrancyGuard { mapping(uint256 => Tier) public tiers; uint256 public totalReserved; mapping(uint256 => uint256) public tierMints; mapping(uint256 => mapping(address => uint256)) internal walletMinted; uint256 public reservedMints; function __ERC721ATieringExtension_init(Tier[] memory _tiers) internal onlyInitializing { __ERC721ATieringExtension_init_unchained(_tiers); } function __ERC721ATieringExtension_init_unchained(Tier[] memory _tiers) internal onlyInitializing { _registerInterface(type(IERC721TieringExtension).interfaceId); for (uint256 i = 0; i < _tiers.length; i++) { tiers[i] = _tiers[i]; totalReserved += _tiers[i].reserved; } } /* ADMIN */ function configureTiering(uint256 tierId, Tier calldata tier) public onlyOwner { require(tier.maxAllocation >= tierMints[tierId], "LOWER_THAN_MINTED"); if (tiers[tierId].reserved > 0) { require(tier.reserved >= tierMints[tierId], "LOW_RESERVE_AMOUNT"); } if (tierMints[tierId] > 0) { require( tier.maxPerWallet >= tiers[tierId].maxPerWallet, "LOW_MAX_PER_WALLET" ); } totalReserved -= tiers[tierId].reserved; tiers[tierId] = tier; totalReserved += tier.reserved; require(totalReserved <= maxSupply, "MAX_SUPPLY_EXCEEDED"); } function configureTiering( uint256[] calldata _tierIds, Tier[] calldata _tiers ) public onlyOwner { for (uint256 i = 0; i < _tierIds.length; i++) { configureTiering(_tierIds[i], _tiers[i]); } } /* PUBLIC */ function setMaxSupply(uint256 newValue) public virtual override(ERC721AMinterExtension) onlyOwner { ERC721AMinterExtension.setMaxSupply(newValue); require( newValue - totalSupply() >= totalReserved - reservedMints, "LOWER_THAN_RESERVED" ); } function onTierAllowlist( uint256 tierId, address minter, uint256 maxAllowance, bytes32[] calldata proof ) public view returns (bool) { return MerkleProof.verify( proof, tiers[tierId].merkleRoot, _generateMerkleLeaf(minter, maxAllowance) ); } function eligibleForTier( uint256 tierId, address minter, uint256 maxAllowance, bytes32[] calldata proof ) public view returns (uint256 maxMintable) { require(tiers[tierId].maxPerWallet > 0, "NOT_EXISTS"); require(block.timestamp >= tiers[tierId].start, "NOT_STARTED"); require(block.timestamp <= tiers[tierId].end, "ALREADY_ENDED"); maxMintable = tiers[tierId].maxPerWallet - walletMinted[tierId][minter]; if (tiers[tierId].merkleRoot != bytes32(0)) { require( walletMinted[tierId][minter] < maxAllowance, "MAXED_ALLOWANCE" ); require( onTierAllowlist(tierId, minter, maxAllowance, proof), "NOT_ALLOWLISTED" ); uint256 remainingAllowance = maxAllowance - walletMinted[tierId][minter]; if (maxMintable > remainingAllowance) { maxMintable = remainingAllowance; } } } function mintByTier( uint256 tierId, uint256 count, uint256 maxAllowance, bytes32[] calldata proof ) external payable nonReentrant { address minter = _msgSender(); uint256 maxMintable = eligibleForTier( tierId, minter, maxAllowance, proof ); require(count <= maxMintable, "EXCEEDS_MAX"); require(count <= remainingForTier(tierId), "EXCEEDS_ALLOCATION"); require( count + tierMints[tierId] <= tiers[tierId].maxAllocation, "EXCEEDS_ALLOCATION" ); if (tiers[tierId].currency == address(0)) { require( tiers[tierId].price * count <= msg.value, "INSUFFICIENT_AMOUNT" ); } else { IERC20(tiers[tierId].currency).transferFrom( minter, address(this), tiers[tierId].price * count ); } walletMinted[tierId][minter] += count; tierMints[tierId] += count; if (tiers[tierId].reserved > 0) { reservedMints += count; } _mintTo(minter, count); } function remainingForTier(uint256 tierId) public view returns (uint256 tierRemaining) { // Substract all the remaining reserved spots from the total remaining supply... tierRemaining = (maxSupply - totalSupply()) - (totalReserved - reservedMints); // If this tier has reserved spots, add remaining spots back to result... if (tiers[tierId].reserved > 0) { tierRemaining += (tiers[tierId].reserved - tierMints[tierId]); } } function walletMintedByTier(uint256 tierId, address wallet) public view returns (uint256) { return walletMinted[tierId][wallet]; } /* PRIVATE */ function _generateMerkleLeaf(address account, uint256 maxAllowance) private pure returns (bytes32) { return keccak256(abi.encodePacked(account, maxAllowance)); } }
// SPDX-License-Identifier: AGPL-3.0 pragma solidity 0.8.9; import "@openzeppelin/contracts/proxy/utils/Initializable.sol"; import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol"; import "@openzeppelin/contracts/utils/Address.sol"; import "@openzeppelin/contracts/utils/Counters.sol"; import "@openzeppelin/contracts/security/ReentrancyGuard.sol"; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts/token/ERC721/IERC721.sol"; enum WithdrawMode { OWNER, RECIPIENT, ANYONE, NOBODY } interface IWithdrawExtension { function setWithdrawRecipient(address _withdrawRecipient) external; function lockWithdrawRecipient() external; function revokeWithdrawPower() external; function setWithdrawMode(WithdrawMode _withdrawMode) external; function lockWithdrawMode() external; function withdraw( address[] calldata claimTokens, uint256[] calldata amounts ) external; } abstract contract WithdrawExtension is IWithdrawExtension, Initializable, Ownable, ERC165Storage { using Address for address; using Address for address payable; event WithdrawPowerRevoked(); event Withdrawn(address[] claimTokens, uint256[] amounts); address public withdrawRecipient; bool public withdrawRecipientLocked; bool public withdrawPowerRevoked; WithdrawMode public withdrawMode; bool public withdrawModeLocked; /* INTERNAL */ function __WithdrawExtension_init( address _withdrawRecipient, WithdrawMode _withdrawMode ) internal onlyInitializing { __WithdrawExtension_init_unchained(_withdrawRecipient, _withdrawMode); } function __WithdrawExtension_init_unchained( address _withdrawRecipient, WithdrawMode _withdrawMode ) internal onlyInitializing { _registerInterface(type(IWithdrawExtension).interfaceId); withdrawRecipient = _withdrawRecipient; withdrawMode = _withdrawMode; } /* ADMIN */ function setWithdrawRecipient(address _withdrawRecipient) external onlyOwner { require(!withdrawRecipientLocked, "LOCKED"); withdrawRecipient = _withdrawRecipient; } function lockWithdrawRecipient() external onlyOwner { require(!withdrawRecipientLocked, "LOCKED"); withdrawRecipientLocked = true; } function setWithdrawMode(WithdrawMode _withdrawMode) external onlyOwner { require(!withdrawModeLocked, "LOCKED"); withdrawMode = _withdrawMode; } function lockWithdrawMode() external onlyOwner { require(!withdrawModeLocked, "OCKED"); withdrawModeLocked = true; } /* PUBLIC */ function withdraw( address[] calldata claimTokens, uint256[] calldata amounts ) external { /** * We are using msg.sender for smaller attack surface when evaluating * the sender of the function call. If in future we want to handle "withdraw" * functionality via meta transactions, we should consider using `_msgSender` */ _assertWithdrawAccess(msg.sender); require(withdrawRecipient != address(0), "WITHDRAW/NO_RECIPIENT"); require(!withdrawPowerRevoked, "WITHDRAW/EMERGENCY_POWER_REVOKED"); for (uint256 i = 0; i < claimTokens.length; i++) { if (claimTokens[i] == address(0)) { payable(withdrawRecipient).sendValue(amounts[i]); } else { IERC20(claimTokens[i]).transfer(withdrawRecipient, amounts[i]); } } emit Withdrawn(claimTokens, amounts); } function revokeWithdrawPower() external onlyOwner { withdrawPowerRevoked = true; emit WithdrawPowerRevoked(); } /* INTERNAL */ function _assertWithdrawAccess(address account) internal view { if (withdrawMode == WithdrawMode.NOBODY) { revert("WITHDRAW/LOCKED"); } else if (withdrawMode == WithdrawMode.ANYONE) { return; } else if (withdrawMode == WithdrawMode.RECIPIENT) { require(withdrawRecipient == account, "WITHDRAW/ONLY_RECIPIENT"); } else if (withdrawMode == WithdrawMode.OWNER) { require(owner() == account, "WITHDRAW/ONLY_OWNER"); } } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.9; import "@openzeppelin/contracts/utils/Context.sol"; import "@openzeppelin/contracts/proxy/utils/Initializable.sol"; import "@openzeppelin/contracts/access/Ownable.sol"; /** * @dev Context variant with ERC2771 support. */ abstract contract ERC2771ContextOwnable is Initializable, Context, Ownable { address public _trustedForwarder; function __ERC2771ContextOwnable_init(address trustedForwarder) internal onlyInitializing { __ERC2771ContextOwnable_init_unchained(trustedForwarder); } function __ERC2771ContextOwnable_init_unchained(address trustedForwarder) internal onlyInitializing { _trustedForwarder = trustedForwarder; } function setTrustedForwarder(address trustedForwarder) public onlyOwner { _trustedForwarder = trustedForwarder; } function isTrustedForwarder(address forwarder) public view virtual returns (bool) { return forwarder == _trustedForwarder; } function _msgSender() internal view virtual override returns (address sender) { if (isTrustedForwarder(msg.sender)) { // The assembly code is more direct than the Solidity version using `abi.decode`. assembly { sender := shr(96, calldataload(sub(calldatasize(), 20))) } } else { return super._msgSender(); } } function _msgData() internal view virtual override returns (bytes calldata) { if (isTrustedForwarder(msg.sender)) { return msg.data[:msg.data.length - 20]; } else { return super._msgData(); } } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.9; pragma abicoder v2; import "./LibPart.sol"; interface IRoyalties { function getRaribleV2Royalties(uint256 id) external view returns (LibPart.Part[] memory); }
// SPDX-License-Identifier: MIT pragma solidity 0.8.9; library LibPart { bytes32 public constant TYPE_HASH = keccak256("Part(address account,uint96 value)"); struct Part { address payable account; uint96 value; } function hash(Part memory part) internal pure returns (bytes32) { return keccak256(abi.encode(TYPE_HASH, part.account, part.value)); } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.9; library LibRoyaltiesV2 { /* * bytes4(keccak256('getRaribleV2Royalties(uint256)')) == 0xcad96cca */ bytes4 constant _INTERFACE_ID_ROYALTIES = 0xcad96cca; }
// SPDX-License-Identifier: MIT // ERC721A Contracts v4.1.0 // Creator: Chiru Labs pragma solidity ^0.8.4; import './IERC721A.sol'; /** * @dev ERC721 token receiver interface. */ interface ERC721A__IERC721Receiver { function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); } /** * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, * including the Metadata extension. Built to optimize for lower gas during batch mints. * * Assumes serials are sequentially minted starting at `_startTokenId()` * (defaults to 0, e.g. 0, 1, 2, 3..). * * Assumes that an owner cannot have more than 2**64 - 1 (max value of uint64) of supply. * * Assumes that the maximum token id cannot exceed 2**256 - 1 (max value of uint256). */ contract ERC721A is IERC721A { // Mask of an entry in packed address data. uint256 private constant BITMASK_ADDRESS_DATA_ENTRY = (1 << 64) - 1; // The bit position of `numberMinted` in packed address data. uint256 private constant BITPOS_NUMBER_MINTED = 64; // The bit position of `numberBurned` in packed address data. uint256 private constant BITPOS_NUMBER_BURNED = 128; // The bit position of `aux` in packed address data. uint256 private constant BITPOS_AUX = 192; // Mask of all 256 bits in packed address data except the 64 bits for `aux`. uint256 private constant BITMASK_AUX_COMPLEMENT = (1 << 192) - 1; // The bit position of `startTimestamp` in packed ownership. uint256 private constant BITPOS_START_TIMESTAMP = 160; // The bit mask of the `burned` bit in packed ownership. uint256 private constant BITMASK_BURNED = 1 << 224; // The bit position of the `nextInitialized` bit in packed ownership. uint256 private constant BITPOS_NEXT_INITIALIZED = 225; // The bit mask of the `nextInitialized` bit in packed ownership. uint256 private constant BITMASK_NEXT_INITIALIZED = 1 << 225; // The bit position of `extraData` in packed ownership. uint256 private constant BITPOS_EXTRA_DATA = 232; // Mask of all 256 bits in a packed ownership except the 24 bits for `extraData`. uint256 private constant BITMASK_EXTRA_DATA_COMPLEMENT = (1 << 232) - 1; // The mask of the lower 160 bits for addresses. uint256 private constant BITMASK_ADDRESS = (1 << 160) - 1; // The maximum `quantity` that can be minted with `_mintERC2309`. // This limit is to prevent overflows on the address data entries. // For a limit of 5000, a total of 3.689e15 calls to `_mintERC2309` // is required to cause an overflow, which is unrealistic. uint256 private constant MAX_MINT_ERC2309_QUANTITY_LIMIT = 5000; // The tokenId of the next token to be minted. uint256 private _currentIndex; // The number of tokens burned. uint256 private _burnCounter; // Token name string private _name; // Token symbol string private _symbol; // Mapping from token ID to ownership details // An empty struct value does not necessarily mean the token is unowned. // See `_packedOwnershipOf` implementation for details. // // Bits Layout: // - [0..159] `addr` // - [160..223] `startTimestamp` // - [224] `burned` // - [225] `nextInitialized` // - [232..255] `extraData` mapping(uint256 => uint256) private _packedOwnerships; // Mapping owner address to address data. // // Bits Layout: // - [0..63] `balance` // - [64..127] `numberMinted` // - [128..191] `numberBurned` // - [192..255] `aux` mapping(address => uint256) private _packedAddressData; // Mapping from token ID to approved address. mapping(uint256 => address) private _tokenApprovals; // Mapping from owner to operator approvals mapping(address => mapping(address => bool)) private _operatorApprovals; constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; _currentIndex = _startTokenId(); } /** * @dev Returns the starting token ID. * To change the starting token ID, please override this function. */ function _startTokenId() internal view virtual returns (uint256) { return 0; } /** * @dev Returns the next token ID to be minted. */ function _nextTokenId() internal view returns (uint256) { return _currentIndex; } /** * @dev Returns the total number of tokens in existence. * Burned tokens will reduce the count. * To get the total number of tokens minted, please see `_totalMinted`. */ function totalSupply() public view override returns (uint256) { // Counter underflow is impossible as _burnCounter cannot be incremented // more than `_currentIndex - _startTokenId()` times. unchecked { return _currentIndex - _burnCounter - _startTokenId(); } } /** * @dev Returns the total amount of tokens minted in the contract. */ function _totalMinted() internal view returns (uint256) { // Counter underflow is impossible as _currentIndex does not decrement, // and it is initialized to `_startTokenId()` unchecked { return _currentIndex - _startTokenId(); } } /** * @dev Returns the total number of tokens burned. */ function _totalBurned() internal view returns (uint256) { return _burnCounter; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { // The interface IDs are constants representing the first 4 bytes of the XOR of // all function selectors in the interface. See: https://eips.ethereum.org/EIPS/eip-165 // e.g. `bytes4(i.functionA.selector ^ i.functionB.selector ^ ...)` return interfaceId == 0x01ffc9a7 || // ERC165 interface ID for ERC165. interfaceId == 0x80ac58cd || // ERC165 interface ID for ERC721. interfaceId == 0x5b5e139f; // ERC165 interface ID for ERC721Metadata. } /** * @dev See {IERC721-balanceOf}. */ function balanceOf(address owner) public view override returns (uint256) { if (owner == address(0)) revert BalanceQueryForZeroAddress(); return _packedAddressData[owner] & BITMASK_ADDRESS_DATA_ENTRY; } /** * Returns the number of tokens minted by `owner`. */ function _numberMinted(address owner) internal view returns (uint256) { return (_packedAddressData[owner] >> BITPOS_NUMBER_MINTED) & BITMASK_ADDRESS_DATA_ENTRY; } /** * Returns the number of tokens burned by or on behalf of `owner`. */ function _numberBurned(address owner) internal view returns (uint256) { return (_packedAddressData[owner] >> BITPOS_NUMBER_BURNED) & BITMASK_ADDRESS_DATA_ENTRY; } /** * Returns the auxiliary data for `owner`. (e.g. number of whitelist mint slots used). */ function _getAux(address owner) internal view returns (uint64) { return uint64(_packedAddressData[owner] >> BITPOS_AUX); } /** * Sets the auxiliary data for `owner`. (e.g. number of whitelist mint slots used). * If there are multiple variables, please pack them into a uint64. */ function _setAux(address owner, uint64 aux) internal { uint256 packed = _packedAddressData[owner]; uint256 auxCasted; // Cast `aux` with assembly to avoid redundant masking. assembly { auxCasted := aux } packed = (packed & BITMASK_AUX_COMPLEMENT) | (auxCasted << BITPOS_AUX); _packedAddressData[owner] = packed; } /** * Returns the packed ownership data of `tokenId`. */ function _packedOwnershipOf(uint256 tokenId) private view returns (uint256) { uint256 curr = tokenId; unchecked { if (_startTokenId() <= curr) if (curr < _currentIndex) { uint256 packed = _packedOwnerships[curr]; // If not burned. if (packed & BITMASK_BURNED == 0) { // Invariant: // There will always be an ownership that has an address and is not burned // before an ownership that does not have an address and is not burned. // Hence, curr will not underflow. // // We can directly compare the packed value. // If the address is zero, packed is zero. while (packed == 0) { packed = _packedOwnerships[--curr]; } return packed; } } } revert OwnerQueryForNonexistentToken(); } /** * Returns the unpacked `TokenOwnership` struct from `packed`. */ function _unpackedOwnership(uint256 packed) private pure returns (TokenOwnership memory ownership) { ownership.addr = address(uint160(packed)); ownership.startTimestamp = uint64(packed >> BITPOS_START_TIMESTAMP); ownership.burned = packed & BITMASK_BURNED != 0; ownership.extraData = uint24(packed >> BITPOS_EXTRA_DATA); } /** * Returns the unpacked `TokenOwnership` struct at `index`. */ function _ownershipAt(uint256 index) internal view returns (TokenOwnership memory) { return _unpackedOwnership(_packedOwnerships[index]); } /** * @dev Initializes the ownership slot minted at `index` for efficiency purposes. */ function _initializeOwnershipAt(uint256 index) internal { if (_packedOwnerships[index] == 0) { _packedOwnerships[index] = _packedOwnershipOf(index); } } /** * Gas spent here starts off proportional to the maximum mint batch size. * It gradually moves to O(1) as tokens get transferred around in the collection over time. */ function _ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) { return _unpackedOwnership(_packedOwnershipOf(tokenId)); } /** * @dev Packs ownership data into a single uint256. */ function _packOwnershipData(address owner, uint256 flags) private view returns (uint256 result) { assembly { // Mask `owner` to the lower 160 bits, in case the upper bits somehow aren't clean. owner := and(owner, BITMASK_ADDRESS) // `owner | (block.timestamp << BITPOS_START_TIMESTAMP) | flags`. result := or(owner, or(shl(BITPOS_START_TIMESTAMP, timestamp()), flags)) } } /** * @dev See {IERC721-ownerOf}. */ function ownerOf(uint256 tokenId) public view override returns (address) { return address(uint160(_packedOwnershipOf(tokenId))); } /** * @dev See {IERC721Metadata-name}. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev See {IERC721Metadata-symbol}. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev See {IERC721Metadata-tokenURI}. */ function tokenURI(uint256 tokenId) public view virtual override returns (string memory) { if (!_exists(tokenId)) revert URIQueryForNonexistentToken(); string memory baseURI = _baseURI(); return bytes(baseURI).length != 0 ? string(abi.encodePacked(baseURI, _toString(tokenId))) : ''; } /** * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each * token will be the concatenation of the `baseURI` and the `tokenId`. Empty * by default, it can be overridden in child contracts. */ function _baseURI() internal view virtual returns (string memory) { return ''; } /** * @dev Returns the `nextInitialized` flag set if `quantity` equals 1. */ function _nextInitializedFlag(uint256 quantity) private pure returns (uint256 result) { // For branchless setting of the `nextInitialized` flag. assembly { // `(quantity == 1) << BITPOS_NEXT_INITIALIZED`. result := shl(BITPOS_NEXT_INITIALIZED, eq(quantity, 1)) } } /** * @dev See {IERC721-approve}. */ function approve(address to, uint256 tokenId) public override { address owner = ownerOf(tokenId); if (_msgSenderERC721A() != owner) if (!isApprovedForAll(owner, _msgSenderERC721A())) { revert ApprovalCallerNotOwnerNorApproved(); } _tokenApprovals[tokenId] = to; emit Approval(owner, to, tokenId); } /** * @dev See {IERC721-getApproved}. */ function getApproved(uint256 tokenId) public view override returns (address) { if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken(); return _tokenApprovals[tokenId]; } /** * @dev See {IERC721-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public virtual override { if (operator == _msgSenderERC721A()) revert ApproveToCaller(); _operatorApprovals[_msgSenderERC721A()][operator] = approved; emit ApprovalForAll(_msgSenderERC721A(), operator, approved); } /** * @dev See {IERC721-isApprovedForAll}. */ function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) { return _operatorApprovals[owner][operator]; } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId ) public virtual override { safeTransferFrom(from, to, tokenId, ''); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes memory _data ) public virtual override { transferFrom(from, to, tokenId); if (to.code.length != 0) if (!_checkContractOnERC721Received(from, to, tokenId, _data)) { revert TransferToNonERC721ReceiverImplementer(); } } /** * @dev Returns whether `tokenId` exists. * * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}. * * Tokens start existing when they are minted (`_mint`), */ function _exists(uint256 tokenId) internal view returns (bool) { return _startTokenId() <= tokenId && tokenId < _currentIndex && // If within bounds, _packedOwnerships[tokenId] & BITMASK_BURNED == 0; // and not burned. } /** * @dev Equivalent to `_safeMint(to, quantity, '')`. */ function _safeMint(address to, uint256 quantity) internal { _safeMint(to, quantity, ''); } /** * @dev Safely mints `quantity` tokens and transfers them to `to`. * * Requirements: * * - If `to` refers to a smart contract, it must implement * {IERC721Receiver-onERC721Received}, which is called for each safe transfer. * - `quantity` must be greater than 0. * * See {_mint}. * * Emits a {Transfer} event for each mint. */ function _safeMint( address to, uint256 quantity, bytes memory _data ) internal { _mint(to, quantity); unchecked { if (to.code.length != 0) { uint256 end = _currentIndex; uint256 index = end - quantity; do { if (!_checkContractOnERC721Received(address(0), to, index++, _data)) { revert TransferToNonERC721ReceiverImplementer(); } } while (index < end); // Reentrancy protection. if (_currentIndex != end) revert(); } } } /** * @dev Mints `quantity` tokens and transfers them to `to`. * * Requirements: * * - `to` cannot be the zero address. * - `quantity` must be greater than 0. * * Emits a {Transfer} event for each mint. */ function _mint(address to, uint256 quantity) internal { uint256 startTokenId = _currentIndex; if (to == address(0)) revert MintToZeroAddress(); if (quantity == 0) revert MintZeroQuantity(); _beforeTokenTransfers(address(0), to, startTokenId, quantity); // Overflows are incredibly unrealistic. // `balance` and `numberMinted` have a maximum limit of 2**64. // `tokenId` has a maximum limit of 2**256. unchecked { // Updates: // - `balance += quantity`. // - `numberMinted += quantity`. // // We can directly add to the `balance` and `numberMinted`. _packedAddressData[to] += quantity * ((1 << BITPOS_NUMBER_MINTED) | 1); // Updates: // - `address` to the owner. // - `startTimestamp` to the timestamp of minting. // - `burned` to `false`. // - `nextInitialized` to `quantity == 1`. _packedOwnerships[startTokenId] = _packOwnershipData( to, _nextInitializedFlag(quantity) | _nextExtraData(address(0), to, 0) ); uint256 tokenId = startTokenId; uint256 end = startTokenId + quantity; do { emit Transfer(address(0), to, tokenId++); } while (tokenId < end); _currentIndex = end; } _afterTokenTransfers(address(0), to, startTokenId, quantity); } /** * @dev Mints `quantity` tokens and transfers them to `to`. * * This function is intended for efficient minting only during contract creation. * * It emits only one {ConsecutiveTransfer} as defined in * [ERC2309](https://eips.ethereum.org/EIPS/eip-2309), * instead of a sequence of {Transfer} event(s). * * Calling this function outside of contract creation WILL make your contract * non-compliant with the ERC721 standard. * For full ERC721 compliance, substituting ERC721 {Transfer} event(s) with the ERC2309 * {ConsecutiveTransfer} event is only permissible during contract creation. * * Requirements: * * - `to` cannot be the zero address. * - `quantity` must be greater than 0. * * Emits a {ConsecutiveTransfer} event. */ function _mintERC2309(address to, uint256 quantity) internal { uint256 startTokenId = _currentIndex; if (to == address(0)) revert MintToZeroAddress(); if (quantity == 0) revert MintZeroQuantity(); if (quantity > MAX_MINT_ERC2309_QUANTITY_LIMIT) revert MintERC2309QuantityExceedsLimit(); _beforeTokenTransfers(address(0), to, startTokenId, quantity); // Overflows are unrealistic due to the above check for `quantity` to be below the limit. unchecked { // Updates: // - `balance += quantity`. // - `numberMinted += quantity`. // // We can directly add to the `balance` and `numberMinted`. _packedAddressData[to] += quantity * ((1 << BITPOS_NUMBER_MINTED) | 1); // Updates: // - `address` to the owner. // - `startTimestamp` to the timestamp of minting. // - `burned` to `false`. // - `nextInitialized` to `quantity == 1`. _packedOwnerships[startTokenId] = _packOwnershipData( to, _nextInitializedFlag(quantity) | _nextExtraData(address(0), to, 0) ); emit ConsecutiveTransfer(startTokenId, startTokenId + quantity - 1, address(0), to); _currentIndex = startTokenId + quantity; } _afterTokenTransfers(address(0), to, startTokenId, quantity); } /** * @dev Returns the storage slot and value for the approved address of `tokenId`. */ function _getApprovedAddress(uint256 tokenId) private view returns (uint256 approvedAddressSlot, address approvedAddress) { mapping(uint256 => address) storage tokenApprovalsPtr = _tokenApprovals; // The following is equivalent to `approvedAddress = _tokenApprovals[tokenId]`. assembly { // Compute the slot. mstore(0x00, tokenId) mstore(0x20, tokenApprovalsPtr.slot) approvedAddressSlot := keccak256(0x00, 0x40) // Load the slot's value from storage. approvedAddress := sload(approvedAddressSlot) } } /** * @dev Returns whether the `approvedAddress` is equals to `from` or `msgSender`. */ function _isOwnerOrApproved( address approvedAddress, address from, address msgSender ) private pure returns (bool result) { assembly { // Mask `from` to the lower 160 bits, in case the upper bits somehow aren't clean. from := and(from, BITMASK_ADDRESS) // Mask `msgSender` to the lower 160 bits, in case the upper bits somehow aren't clean. msgSender := and(msgSender, BITMASK_ADDRESS) // `msgSender == from || msgSender == approvedAddress`. result := or(eq(msgSender, from), eq(msgSender, approvedAddress)) } } /** * @dev Transfers `tokenId` from `from` to `to`. * * Requirements: * * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) public virtual override { uint256 prevOwnershipPacked = _packedOwnershipOf(tokenId); if (address(uint160(prevOwnershipPacked)) != from) revert TransferFromIncorrectOwner(); (uint256 approvedAddressSlot, address approvedAddress) = _getApprovedAddress(tokenId); // The nested ifs save around 20+ gas over a compound boolean condition. if (!_isOwnerOrApproved(approvedAddress, from, _msgSenderERC721A())) if (!isApprovedForAll(from, _msgSenderERC721A())) revert TransferCallerNotOwnerNorApproved(); if (to == address(0)) revert TransferToZeroAddress(); _beforeTokenTransfers(from, to, tokenId, 1); // Clear approvals from the previous owner. assembly { if approvedAddress { // This is equivalent to `delete _tokenApprovals[tokenId]`. sstore(approvedAddressSlot, 0) } } // Underflow of the sender's balance is impossible because we check for // ownership above and the recipient's balance can't realistically overflow. // Counter overflow is incredibly unrealistic as tokenId would have to be 2**256. unchecked { // We can directly increment and decrement the balances. --_packedAddressData[from]; // Updates: `balance -= 1`. ++_packedAddressData[to]; // Updates: `balance += 1`. // Updates: // - `address` to the next owner. // - `startTimestamp` to the timestamp of transfering. // - `burned` to `false`. // - `nextInitialized` to `true`. _packedOwnerships[tokenId] = _packOwnershipData( to, BITMASK_NEXT_INITIALIZED | _nextExtraData(from, to, prevOwnershipPacked) ); // If the next slot may not have been initialized (i.e. `nextInitialized == false`) . if (prevOwnershipPacked & BITMASK_NEXT_INITIALIZED == 0) { uint256 nextTokenId = tokenId + 1; // If the next slot's address is zero and not burned (i.e. packed value is zero). if (_packedOwnerships[nextTokenId] == 0) { // If the next slot is within bounds. if (nextTokenId != _currentIndex) { // Initialize the next slot to maintain correctness for `ownerOf(tokenId + 1)`. _packedOwnerships[nextTokenId] = prevOwnershipPacked; } } } } emit Transfer(from, to, tokenId); _afterTokenTransfers(from, to, tokenId, 1); } /** * @dev Equivalent to `_burn(tokenId, false)`. */ function _burn(uint256 tokenId) internal virtual { _burn(tokenId, false); } /** * @dev Destroys `tokenId`. * The approval is cleared when the token is burned. * * Requirements: * * - `tokenId` must exist. * * Emits a {Transfer} event. */ function _burn(uint256 tokenId, bool approvalCheck) internal virtual { uint256 prevOwnershipPacked = _packedOwnershipOf(tokenId); address from = address(uint160(prevOwnershipPacked)); (uint256 approvedAddressSlot, address approvedAddress) = _getApprovedAddress(tokenId); if (approvalCheck) { // The nested ifs save around 20+ gas over a compound boolean condition. if (!_isOwnerOrApproved(approvedAddress, from, _msgSenderERC721A())) if (!isApprovedForAll(from, _msgSenderERC721A())) revert TransferCallerNotOwnerNorApproved(); } _beforeTokenTransfers(from, address(0), tokenId, 1); // Clear approvals from the previous owner. assembly { if approvedAddress { // This is equivalent to `delete _tokenApprovals[tokenId]`. sstore(approvedAddressSlot, 0) } } // Underflow of the sender's balance is impossible because we check for // ownership above and the recipient's balance can't realistically overflow. // Counter overflow is incredibly unrealistic as `tokenId` would have to be 2**256. unchecked { // Updates: // - `balance -= 1`. // - `numberBurned += 1`. // // We can directly decrement the balance, and increment the number burned. // This is equivalent to `packed -= 1; packed += 1 << BITPOS_NUMBER_BURNED;`. _packedAddressData[from] += (1 << BITPOS_NUMBER_BURNED) - 1; // Updates: // - `address` to the last owner. // - `startTimestamp` to the timestamp of burning. // - `burned` to `true`. // - `nextInitialized` to `true`. _packedOwnerships[tokenId] = _packOwnershipData( from, (BITMASK_BURNED | BITMASK_NEXT_INITIALIZED) | _nextExtraData(from, address(0), prevOwnershipPacked) ); // If the next slot may not have been initialized (i.e. `nextInitialized == false`) . if (prevOwnershipPacked & BITMASK_NEXT_INITIALIZED == 0) { uint256 nextTokenId = tokenId + 1; // If the next slot's address is zero and not burned (i.e. packed value is zero). if (_packedOwnerships[nextTokenId] == 0) { // If the next slot is within bounds. if (nextTokenId != _currentIndex) { // Initialize the next slot to maintain correctness for `ownerOf(tokenId + 1)`. _packedOwnerships[nextTokenId] = prevOwnershipPacked; } } } } emit Transfer(from, address(0), tokenId); _afterTokenTransfers(from, address(0), tokenId, 1); // Overflow not possible, as _burnCounter cannot be exceed _currentIndex times. unchecked { _burnCounter++; } } /** * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target contract. * * @param from address representing the previous owner of the given token ID * @param to target address that will receive the tokens * @param tokenId uint256 ID of the token to be transferred * @param _data bytes optional data to send along with the call * @return bool whether the call correctly returned the expected magic value */ function _checkContractOnERC721Received( address from, address to, uint256 tokenId, bytes memory _data ) private returns (bool) { try ERC721A__IERC721Receiver(to).onERC721Received(_msgSenderERC721A(), from, tokenId, _data) returns ( bytes4 retval ) { return retval == ERC721A__IERC721Receiver(to).onERC721Received.selector; } catch (bytes memory reason) { if (reason.length == 0) { revert TransferToNonERC721ReceiverImplementer(); } else { assembly { revert(add(32, reason), mload(reason)) } } } } /** * @dev Directly sets the extra data for the ownership data `index`. */ function _setExtraDataAt(uint256 index, uint24 extraData) internal { uint256 packed = _packedOwnerships[index]; if (packed == 0) revert OwnershipNotInitializedForExtraData(); uint256 extraDataCasted; // Cast `extraData` with assembly to avoid redundant masking. assembly { extraDataCasted := extraData } packed = (packed & BITMASK_EXTRA_DATA_COMPLEMENT) | (extraDataCasted << BITPOS_EXTRA_DATA); _packedOwnerships[index] = packed; } /** * @dev Returns the next extra data for the packed ownership data. * The returned result is shifted into position. */ function _nextExtraData( address from, address to, uint256 prevOwnershipPacked ) private view returns (uint256) { uint24 extraData = uint24(prevOwnershipPacked >> BITPOS_EXTRA_DATA); return uint256(_extraData(from, to, extraData)) << BITPOS_EXTRA_DATA; } /** * @dev Called during each token transfer to set the 24bit `extraData` field. * Intended to be overridden by the cosumer contract. * * `previousExtraData` - the value of `extraData` before transfer. * * Calling conditions: * * - When `from` and `to` are both non-zero, `from`'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. * - When `to` is zero, `tokenId` will be burned by `from`. * - `from` and `to` are never both zero. */ function _extraData( address from, address to, uint24 previousExtraData ) internal view virtual returns (uint24) {} /** * @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. * This includes minting. * And also called before burning one token. * * startTokenId - the first token id to be transferred * quantity - the amount to be transferred * * Calling conditions: * * - When `from` and `to` are both non-zero, `from`'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. * - When `to` is zero, `tokenId` will be burned by `from`. * - `from` and `to` are never both zero. */ function _beforeTokenTransfers( address from, address to, uint256 startTokenId, uint256 quantity ) internal virtual {} /** * @dev Hook that is called after a set of serially-ordered token ids have been transferred. * This includes minting. * And also called after one token has been burned. * * startTokenId - the first token id to be transferred * quantity - the amount to be transferred * * Calling conditions: * * - When `from` and `to` are both non-zero, `from`'s `tokenId` has been * transferred to `to`. * - When `from` is zero, `tokenId` has been minted for `to`. * - When `to` is zero, `tokenId` has been burned by `from`. * - `from` and `to` are never both zero. */ function _afterTokenTransfers( address from, address to, uint256 startTokenId, uint256 quantity ) internal virtual {} /** * @dev Returns the message sender (defaults to `msg.sender`). * * If you are writing GSN compatible contracts, you need to override this function. */ function _msgSenderERC721A() internal view virtual returns (address) { return msg.sender; } /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function _toString(uint256 value) internal pure returns (string memory ptr) { assembly { // The maximum value of a uint256 contains 78 digits (1 byte per digit), // but we allocate 128 bytes to keep the free memory pointer 32-byte word aliged. // We will need 1 32-byte word to store the length, // and 3 32-byte words to store a maximum of 78 digits. Total: 32 + 3 * 32 = 128. ptr := add(mload(0x40), 128) // Update the free memory pointer to allocate. mstore(0x40, ptr) // Cache the end of the memory to calculate the length later. let end := ptr // We write the string from the rightmost digit to the leftmost digit. // The following is essentially a do-while loop that also handles the zero case. // Costs a bit more than early returning for the zero case, // but cheaper in terms of deployment and overall runtime costs. for { // Initialize and perform the first pass without check. let temp := value // Move the pointer 1 byte leftwards to point to an empty character slot. ptr := sub(ptr, 1) // Write the character to the pointer. 48 is the ASCII index of '0'. mstore8(ptr, add(48, mod(temp, 10))) temp := div(temp, 10) } temp { // Keep dividing `temp` until zero. temp := div(temp, 10) } { // Body of the for loop. ptr := sub(ptr, 1) mstore8(ptr, add(48, mod(temp, 10))) } let length := sub(end, ptr) // Move the pointer 32 bytes leftwards to make room for the length. ptr := sub(ptr, 32) // Store the length. mstore(ptr, length) } } }
// SPDX-License-Identifier: MIT // ERC721A Contracts v4.1.0 // Creator: Chiru Labs pragma solidity ^0.8.4; /** * @dev Interface of an ERC721A compliant contract. */ interface IERC721A { /** * The caller must own the token or be an approved operator. */ error ApprovalCallerNotOwnerNorApproved(); /** * The token does not exist. */ error ApprovalQueryForNonexistentToken(); /** * The caller cannot approve to their own address. */ error ApproveToCaller(); /** * Cannot query the balance for the zero address. */ error BalanceQueryForZeroAddress(); /** * Cannot mint to the zero address. */ error MintToZeroAddress(); /** * The quantity of tokens minted must be more than zero. */ error MintZeroQuantity(); /** * The token does not exist. */ error OwnerQueryForNonexistentToken(); /** * The caller must own the token or be an approved operator. */ error TransferCallerNotOwnerNorApproved(); /** * The token must be owned by `from`. */ error TransferFromIncorrectOwner(); /** * Cannot safely transfer to a contract that does not implement the ERC721Receiver interface. */ error TransferToNonERC721ReceiverImplementer(); /** * Cannot transfer to the zero address. */ error TransferToZeroAddress(); /** * The token does not exist. */ error URIQueryForNonexistentToken(); /** * The `quantity` minted with ERC2309 exceeds the safety limit. */ error MintERC2309QuantityExceedsLimit(); /** * The `extraData` cannot be set on an unintialized ownership slot. */ error OwnershipNotInitializedForExtraData(); struct TokenOwnership { // The address of the owner. address addr; // Keeps track of the start time of ownership with minimal overhead for tokenomics. uint64 startTimestamp; // Whether the token has been burned. bool burned; // Arbitrary data similar to `startTimestamp` that can be set through `_extraData`. uint24 extraData; } /** * @dev Returns the total amount of tokens stored by the contract. * * Burned tokens are calculated here, use `_totalMinted()` if you want to count just minted tokens. */ function totalSupply() external view returns (uint256); // ============================== // 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); // ============================== // IERC721 // ============================== /** * @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 be have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); // ============================== // IERC721Metadata // ============================== /** * @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); // ============================== // IERC2309 // ============================== /** * @dev Emitted when tokens in `fromTokenId` to `toTokenId` (inclusive) is transferred from `from` to `to`, * as defined in the ERC2309 standard. See `_mintERC2309` for more details. */ event ConsecutiveTransfer(uint256 indexed fromTokenId, uint256 toTokenId, address indexed from, address indexed to); }
{ "evmVersion": "london", "libraries": {}, "metadata": { "bytecodeHash": "ipfs", "useLiteralContent": true }, "optimizer": { "enabled": true, "runs": 6 }, "remappings": [], "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } } }
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A token is a representation of an on-chain or off-chain asset. The token page shows information such as price, total supply, holders, transfers and social links. Learn more about this page in our Knowledge Base.