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Contract Source Code Verified (Exact Match)
Contract Name:
Test721C
Compiler Version
v0.8.24+commit.e11b9ed9
ZkSolc Version
v1.5.7
Optimization Enabled:
Yes with Mode 3
Other Settings:
cancun EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
//SPDX-License-Identifier: MIT pragma solidity 0.8.24; import "@limitbreak/tm-core-lib/src/token/erc721/ERC721C.sol"; import {CreatorTokenTransferValidator} from "../CreatorTokenTransferValidator.sol"; contract Test721C is ERC721C { address public owner; uint256 nextTokenId; constructor() ERC721C("Test", "T") CreatorTokenBase(address(0x3203c3f64312AF9344e42EF8Aa45B97C9DFE4594)) { owner = 0xB59fcB2a48Bce4cB2B83Fd3Aaf62db80f6DF5204; } function _requireCallerIsContractOwner() internal view override { if (msg.sender != owner) revert(); } function mint(uint256 count) external { uint256 tokenId = nextTokenId; uint256 endTokenId = nextTokenId = tokenId + count; for (; tokenId < endTokenId; ++tokenId) { _mint(msg.sender, tokenId); } } function setSecurityLevel(uint8 level) external { if (msg.sender != owner) revert(); CreatorTokenTransferValidator(getTransferValidator()).setTransferSecurityLevelOfCollection(address(this), level, false, false, false); } }
pragma solidity ^0.8.4; import "./ERC721.sol"; import "../../utils/token/AutomaticValidatorTransferApproval.sol"; import "../../utils/token/CreatorTokenBase.sol"; import "../../utils/token/Constants.sol"; abstract contract ERC721CBase is ERC721, CreatorTokenBase, AutomaticValidatorTransferApproval { constructor(string memory name_, string memory symbol_) ERC721(name_, symbol_) { } /** * @notice Overrides behavior of isApprovedFor all such that if an operator is not explicitly approved * for all, the contract owner can optionally auto-approve the 721-C transfer validator for transfers. */ function isApprovedForAll(address owner, address operator) public view virtual override returns (bool isApproved) { isApproved = super.isApprovedForAll(owner, operator); if (!isApproved) { if (storageAutomaticValidatorTransferApproval().autoApproveTransfersFromValidator) { isApproved = operator == address(getTransferValidator()); } } } /** * @notice Indicates whether the contract implements the specified interface. * @dev Overrides supportsInterface in ERC165. * @param interfaceId The interface id * @return true if the contract implements the specified interface, false otherwise */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(ICreatorToken).interfaceId || interfaceId == type(ICreatorTokenLegacy).interfaceId || super.supportsInterface(interfaceId); } /** * @notice Returns the function selector for the transfer validator's validation function to be called * @notice for transaction simulation. */ function getTransferValidationFunction() external pure returns (bytes4 functionSignature, bool isViewFunction) { functionSignature = bytes4(keccak256("validateTransfer(address,address,address,uint256)")); isViewFunction = true; } function _validateTransfer( address caller, address from, address to, uint256 tokenId, uint256 value ) internal virtual override { _preValidateTransfer(caller, from, to, tokenId, value); } function _tokenType() internal pure override returns(uint16) { return uint16(TOKEN_TYPE_ERC721); } } /** * @title ERC721C * @author Limit Break, Inc. * @notice Extends OpenZeppelin's ERC721 implementation with Creator Token functionality, which * allows the contract owner to update the transfer validation logic by managing a security policy in * an external transfer validation security policy registry. See {CreatorTokenTransferValidator}. */ abstract contract ERC721C is ERC721CBase { constructor(string memory name_, string memory symbol_) ERC721CBase(name_, symbol_) { } } abstract contract ERC721CInitializable is ERC721CBase { struct StorageERC721Initializable { bool erc721Initialized; } bytes32 private constant ERC721_INITIALIZABLE_STORAGE_SLOT = keccak256("storage.ERC721Initializable"); function storageERC721Initializable() internal pure returns (StorageERC721Initializable storage ptr) { bytes32 slot = ERC721_INITIALIZABLE_STORAGE_SLOT; assembly { ptr.slot := slot } } error ERC721OpenZeppelinInitializable__AlreadyInitializedERC721(); constructor() ERC721CBase("", "") { } /// @dev Initializes parameters of ERC721 tokens. /// These cannot be set in the constructor because this contract is optionally compatible with EIP-1167. function initializeERC721(string memory name_, string memory symbol_) public virtual { _requireCallerIsContractOwner(); if(storageERC721Initializable().erc721Initialized) { revert ERC721OpenZeppelinInitializable__AlreadyInitializedERC721(); } storageERC721Initializable().erc721Initialized = true; StorageERC721.data().name = name_; StorageERC721.data().symbol = symbol_; _emitDefaultTransferValidator(); _registerTokenType(getTransferValidator()); } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.24; import "./Constants.sol"; import "./DataTypes.sol"; import "./ZkTstorish.sol"; import "@limitbreak/permit-c/PermitC.sol"; import "@limitbreak/tm-core-lib/src/utils/introspection/ERC165.sol"; import "@limitbreak/tm-core-lib/src/utils/structs/EnumerableSet.sol"; import "@limitbreak/tm-core-lib/src/utils/token/IEOARegistry.sol"; import "@limitbreak/tm-core-lib/src/utils/token/ITransferValidator.sol"; /** * @title CreatorTokenTransferValidator * @author Limit Break, Inc. * @notice The CreatorTokenTransferValidator contract is designed to provide a customizable and secure transfer * validation mechanism for NFT collections. This contract allows the owner of an NFT collection to configure * the transfer security level, blacklisted accounts and codehashes, whitelisted accounts and codehashes, and * authorized accounts and codehashes for each collection. * * @dev <h4>Features</h4> * - Transfer security levels: Provides different levels of transfer security, * from open transfers to completely restricted transfers. * - Blacklist: Allows the owner of a collection to blacklist specific operator addresses or codehashes * from executing transfers on behalf of others. * - Whitelist: Allows the owner of a collection to whitelist specific operator addresses or codehashes * permitted to execute transfers on behalf of others or send/receive tokens when otherwise disabled by * security policy. * - Authorizers: Allows the owner of a collection to enable authorizer contracts, that can perform * authorization-based filtering of transfers. * * @dev <h4>Benefits</h4> * - Enhanced security: Allows creators to have more control over their NFT collections, ensuring the safety * and integrity of their assets. * - Flexibility: Provides collection owners the ability to customize transfer rules as per their requirements. * - Compliance: Facilitates compliance with regulations by enabling creators to restrict transfers based on * specific criteria. * * @dev <h4>Intended Usage</h4> * - The CreatorTokenTransferValidatorV3 contract is intended to be used by NFT collection owners to manage and * enforce transfer policies. This contract is integrated with the following varations of creator token * NFT contracts to validate transfers according to the defined security policies. * * - ERC721-C: Creator token implenting OpenZeppelin's ERC-721 standard. * - ERC721-AC: Creator token implenting Azuki's ERC-721A standard. * - ERC721-CW: Creator token implementing OpenZeppelin's ERC-721 standard with opt-in staking to * wrap/upgrade a pre-existing ERC-721 collection. * - ERC721-ACW: Creator token implementing Azuki's ERC721-A standard with opt-in staking to * wrap/upgrade a pre-existing ERC-721 collection. * - ERC1155-C: Creator token implenting OpenZeppelin's ERC-1155 standard. * - ERC1155-CW: Creator token implementing OpenZeppelin's ERC-1155 standard with opt-in staking to * wrap/upgrade a pre-existing ERC-1155 collection. * * <h4>Transfer Security Levels</h4> * - Recommended: Recommended defaults are same as Level 3 (Whitelisting with OTC Enabled). * - Caller Constraints: OperatorWhitelistEnableOTC * - Receiver Constraints: None * - Level 1: No transfer restrictions. * - Caller Constraints: None * - Receiver Constraints: None * - Level 2: Only non-blacklisted operators can initiate transfers, over-the-counter (OTC) trading enabled. * - Caller Constraints: OperatorBlacklistEnableOTC * - Receiver Constraints: None * - Level 3: Only whitelisted accounts can initiate transfers, over-the-counter (OTC) trading enabled. * - Caller Constraints: OperatorWhitelistEnableOTC * - Receiver Constraints: None * - Level 4: Only whitelisted accounts can initiate transfers, over-the-counter (OTC) trading disabled. * - Caller Constraints: OperatorWhitelistDisableOTC * - Receiver Constraints: None * - Level 5: Only whitelisted accounts can initiate transfers, over-the-counter (OTC) trading enabled. * Transfers to contracts with code are not allowed, unless present on the whitelist. * - Caller Constraints: OperatorWhitelistEnableOTC * - Receiver Constraints: NoCode * - Level 6: Only whitelisted accounts can initiate transfers, over-the-counter (OTC) trading enabled. * Transfers are allowed only to Externally Owned Accounts (EOAs), unless present on the whitelist. * - Caller Constraints: OperatorWhitelistEnableOTC * - Receiver Constraints: EOA * - Level 7: Only whitelisted accounts can initiate transfers, over-the-counter (OTC) trading disabled. * Transfers to contracts with code are not allowed, unless present on the whitelist. * - Caller Constraints: OperatorWhitelistDisableOTC * - Receiver Constraints: NoCode * - Level 8: Only whitelisted accounts can initiate transfers, over-the-counter (OTC) trading disabled. * Transfers are allowed only to Externally Owned Accounts (EOAs), unless present on the whitelist. * - Caller Constraints: OperatorWhitelistDisableOTC * - Receiver Constraints: EOA * - Level 9: Soulbound Token, No Transfers Allowed. */ contract CreatorTokenTransferValidator is IEOARegistry, ITransferValidator, ERC165, ZkTstorish, PermitC { using EnumerableSet for EnumerableSet.AddressSet; using EnumerableSet for EnumerableSet.Bytes32Set; /*************************************************************************/ /* CUSTOM ERRORS */ /*************************************************************************/ /// @dev Thrown when attempting to set a list id that does not exist. error CreatorTokenTransferValidator__ListDoesNotExist(); /// @dev Thrown when attempting to transfer the ownership of a list to the zero address. error CreatorTokenTransferValidator__ListOwnershipCannotBeTransferredToZeroAddress(); /// @dev Thrown when attempting to call a function that requires the caller to be the list owner. error CreatorTokenTransferValidator__CallerDoesNotOwnList(); /// @dev Thrown when validating a transfer for a collection using whitelists and the operator is not on the whitelist. error CreatorTokenTransferValidator__CallerMustBeWhitelisted(); /// @dev Thrown when authorizing a transfer for a collection using authorizers and the msg.sender is not in the authorizer list. error CreatorTokenTransferValidator__CallerMustBeAnAuthorizer(); /// @dev Thrown when attempting to call a function that requires owner or default admin role for a collection that the caller does not have. error CreatorTokenTransferValidator__CallerMustHaveElevatedPermissionsForSpecifiedNFT(); /// @dev Thrown when attempting to renounce or transfer ownership of the default list id. error CreatorTokenTransferValidator__CannotReassignOwnershipOfDefaultList(); /// @dev Thrown when constructor args are not valid error CreatorTokenTransferValidator__InvalidConstructorArgs(); /// @dev Thrown when setting the transfer security level to an invalid value. error CreatorTokenTransferValidator__InvalidTransferSecurityLevel(); /// @dev Thrown when validating a transfer for a collection using blacklists and the operator is on the blacklist. error CreatorTokenTransferValidator__OperatorIsBlacklisted(); /// @dev Thrown when validating a transfer for a collection that does not allow receiver to have code and the receiver has code. error CreatorTokenTransferValidator__ReceiverMustNotHaveDeployedCode(); /// @dev Thrown when validating a transfer for a collection that requires receivers be verified EOAs and the receiver is not verified. error CreatorTokenTransferValidator__ReceiverProofOfEOASignatureUnverified(); /// @dev Thrown when a frozen account is the receiver of a transfer error CreatorTokenTransferValidator__ReceiverAccountIsFrozen(); /// @dev Thrown when a frozen account is the sender of a transfer error CreatorTokenTransferValidator__SenderAccountIsFrozen(); /// @dev Thrown when validating a transfer for a collection that is in soulbound token mode. error CreatorTokenTransferValidator__TokenIsSoulbound(); /// @dev Thrown when an authorizer attempts to set a wildcard authorized operator on collections that don't allow wildcards error CreatorTokenTransferValidator__WildcardOperatorsCannotBeAuthorizedForCollection(); /// @dev Thrown when attempting to set a authorized operator when authorization mode is disabled. error CreatorTokenTransferValidator__AuthorizationDisabledForCollection(); /// @dev Thrown when attempting to validate a permitted transfer where the permit type does not match the collection-defined token type. error CreatorTokenTransferValidator__TokenTypesDoNotMatch(); /*************************************************************************/ /* EVENTS */ /*************************************************************************/ /// @dev Emitted when a new list is created. event CreatedList(uint256 indexed id, string name); /// @dev Emitted when a list is applied to a collection. event AppliedListToCollection(address indexed collection, uint120 indexed id); /// @dev Emitted when the ownership of a list is transferred to a new owner. event ReassignedListOwnership(uint256 indexed id, address indexed newOwner); /// @dev Emitted when an account is added to the list of frozen accounts for a collection. event AccountFrozenForCollection(address indexed collection, address indexed account); /// @dev Emitted when an account is removed from the list of frozen accounts for a collection. event AccountUnfrozenForCollection(address indexed collection, address indexed account); /// @dev Emitted when an address is added to a list. event AddedAccountToList(uint8 indexed kind, uint256 indexed id, address indexed account); /// @dev Emitted when a codehash is added to a list. event AddedCodeHashToList(uint8 indexed kind, uint256 indexed id, bytes32 indexed codehash); /// @dev Emitted when an address is removed from a list. event RemovedAccountFromList(uint8 indexed kind, uint256 indexed id, address indexed account); /// @dev Emitted when a codehash is removed from a list. event RemovedCodeHashFromList(uint8 indexed kind, uint256 indexed id, bytes32 indexed codehash); /// @dev Emitted when the security level for a collection is updated. event SetTransferSecurityLevel(address indexed collection, uint8 level); /// @dev Emitted when a collection updates its authorization mode. event SetAuthorizationModeEnabled(address indexed collection, bool disabled, bool authorizersCannotSetWildcardOperators); /// @dev Emitted when a collection turns account freezing on or off. event SetAccountFreezingModeEnabled(address indexed collection, bool enabled); /// @dev Emitted when a collection's token type is updated. event SetTokenType(address indexed collection, uint16 tokenType); /*************************************************************************/ /* STRUCTS */ /*************************************************************************/ /** * @dev This struct is internally for the storage of account and codehash lists. */ struct List { EnumerableSet.AddressSet enumerableAccounts; EnumerableSet.Bytes32Set enumerableCodehashes; mapping (address => bool) nonEnumerableAccounts; mapping (bytes32 => bool) nonEnumerableCodehashes; } /** * @dev This struct is internally for the storage of account lists. */ struct AccountList { EnumerableSet.AddressSet enumerableAccounts; mapping (address => bool) nonEnumerableAccounts; } /*************************************************************************/ /* CONSTANTS */ /*************************************************************************/ /// @dev Immutable lookup table for constant gas determination of caller constraints by security level. /// @dev Created during contract construction using defined constants. uint256 private immutable _callerConstraintsLookup; /// @dev Immutable lookup table for constant gas determination of receiver constraints by security level. /// @dev Created during contract construction using defined constants. uint256 private immutable _receiverConstraintsLookup; /// @dev The address of the EOA Registry to use to validate an account is a verified EOA. address private immutable _eoaRegistry; /// @dev The legacy Creator Token Transfer Validator Interface bytes4 private constant LEGACY_TRANSFER_VALIDATOR_INTERFACE_ID = 0x00000000; /// @dev The default admin role value for contracts that implement access control. bytes32 private constant DEFAULT_ACCESS_CONTROL_ADMIN_ROLE = 0x00; /// @dev Value representing a zero value code hash. bytes32 private constant BYTES32_ZERO = 0x0000000000000000000000000000000000000000000000000000000000000000; address private constant WILDCARD_OPERATOR_ADDRESS = address(0x01); uint16 private constant DEFAULT_TOKEN_TYPE = 0; /*************************************************************************/ /* STORAGE */ /*************************************************************************/ /// @notice Keeps track of the most recently created list id. uint120 public lastListId; /// @dev Used as a collision guard. uint256 private _transientOperatorSlotHolder; /// @notice Mapping of list ids to list owners mapping (uint120 => address) public listOwners; /// @dev Mapping of collection addresses to their security policy settings mapping (address => CollectionSecurityPolicyV3) internal collectionSecurityPolicies; /// @dev Mapping of list ids to blacklist settings mapping (uint120 => List) internal blacklists; /// @dev Mapping of list ids to whitelist settings mapping (uint120 => List) internal whitelists; /// @dev Mapping of list ids to authorizers mapping (uint120 => List) internal authorizers; /// @dev Mapping of collections to accounts that are frozen for those collections mapping (address => AccountList) internal frozenAccounts; constructor( address defaultOwner, address eoaRegistry_, string memory name, string memory version ) ZkTstorish() PermitC( name, version, defaultOwner, block.chainid == 1 ? 0.33 ether : 0.01 ether ) { if (defaultOwner == address(0) || eoaRegistry_ == address(0)) { revert CreatorTokenTransferValidator__InvalidConstructorArgs(); } _createDefaultList(defaultOwner); _eoaRegistry = eoaRegistry_; _callerConstraintsLookup = _constructCallerConstraintsTable(); _receiverConstraintsLookup = _constructReceiverConstraintsTable(); } /** * @dev This function is only called during contract construction to create the default list. */ function _createDefaultList(address defaultOwner) internal { uint120 id = 0; listOwners[id] = defaultOwner; emit CreatedList(id, "DEFAULT LIST"); emit ReassignedListOwnership(id, defaultOwner); } /** * @dev This function is only called during contract construction to create the caller constraints * @dev lookup table. */ function _constructCallerConstraintsTable() internal pure returns (uint256) { return (CALLER_CONSTRAINTS_OPERATOR_WHITELIST_ENABLE_OTC << (TRANSFER_SECURITY_LEVEL_RECOMMENDED << 3)) | (CALLER_CONSTRAINTS_NONE << (TRANSFER_SECURITY_LEVEL_ONE << 3)) | (CALLER_CONSTRAINTS_OPERATOR_BLACKLIST_ENABLE_OTC << (TRANSFER_SECURITY_LEVEL_TWO << 3)) | (CALLER_CONSTRAINTS_OPERATOR_WHITELIST_ENABLE_OTC << (TRANSFER_SECURITY_LEVEL_THREE << 3)) | (CALLER_CONSTRAINTS_OPERATOR_WHITELIST_DISABLE_OTC << (TRANSFER_SECURITY_LEVEL_FOUR << 3)) | (CALLER_CONSTRAINTS_OPERATOR_WHITELIST_ENABLE_OTC << (TRANSFER_SECURITY_LEVEL_FIVE << 3)) | (CALLER_CONSTRAINTS_OPERATOR_WHITELIST_ENABLE_OTC << (TRANSFER_SECURITY_LEVEL_SIX << 3)) | (CALLER_CONSTRAINTS_OPERATOR_WHITELIST_DISABLE_OTC << (TRANSFER_SECURITY_LEVEL_SEVEN << 3)) | (CALLER_CONSTRAINTS_OPERATOR_WHITELIST_DISABLE_OTC << (TRANSFER_SECURITY_LEVEL_EIGHT << 3)) | (CALLER_CONSTRAINTS_SBT << (TRANSFER_SECURITY_LEVEL_NINE << 3)); } /** * @dev This function is only called during contract construction to create the receiver constraints * @dev lookup table. */ function _constructReceiverConstraintsTable() internal pure returns (uint256) { return (RECEIVER_CONSTRAINTS_NONE << (TRANSFER_SECURITY_LEVEL_RECOMMENDED << 3)) | (RECEIVER_CONSTRAINTS_NONE << (TRANSFER_SECURITY_LEVEL_ONE << 3)) | (RECEIVER_CONSTRAINTS_NONE << (TRANSFER_SECURITY_LEVEL_TWO << 3)) | (RECEIVER_CONSTRAINTS_NONE << (TRANSFER_SECURITY_LEVEL_THREE << 3)) | (RECEIVER_CONSTRAINTS_NONE << (TRANSFER_SECURITY_LEVEL_FOUR << 3)) | (RECEIVER_CONSTRAINTS_NO_CODE << (TRANSFER_SECURITY_LEVEL_FIVE << 3)) | (RECEIVER_CONSTRAINTS_EOA << (TRANSFER_SECURITY_LEVEL_SIX << 3)) | (RECEIVER_CONSTRAINTS_NO_CODE << (TRANSFER_SECURITY_LEVEL_SEVEN << 3)) | (RECEIVER_CONSTRAINTS_EOA << (TRANSFER_SECURITY_LEVEL_EIGHT << 3)) | (RECEIVER_CONSTRAINTS_SBT << (TRANSFER_SECURITY_LEVEL_NINE << 3)); } /*************************************************************************/ /* MODIFIERS */ /*************************************************************************/ /** * @dev This modifier restricts a function call to the owner of the list `id`. * @dev Throws when the caller is not the list owner. */ modifier onlyListOwner(uint120 id) { _requireCallerOwnsList(id); _; } /*************************************************************************/ /* APPLY TRANSFER POLICIES */ /*************************************************************************/ /** * @notice Apply the collection transfer policy to a transfer operation of a creator token. * * @dev If the caller is self (Permit-C Processor) it means we have already applied operator validation in the * _beforeTransferFrom callback. In this case, the security policy was already applied and the operator * that used the Permit-C processor passed the security policy check and transfer can be safely allowed. * * @dev The order of checking whitelisted accounts, authorized operator check and whitelisted codehashes * is very deliberate. The order of operations is determined by the most frequently used settings that are * expected in the wild. * * @dev Throws when the collection has enabled account freezing mode and either the `from` or `to` addresses * are on the list of frozen accounts for the collection. * @dev Throws when the collection is set to Level 9 - Soulbound Token. * @dev Throws when the receiver has deployed code and isn't whitelisted, if ReceiverConstraints.NoCode is set * and the transfer is not approved by an authorizer for the collection. * @dev Throws when the receiver has never verified a signature to prove they are an EOA and the receiver * isn't whitelisted, if the ReceiverConstraints.EOA is set and the transfer is not approved by an * authorizer for the collection.. * @dev Throws when `msg.sender` is blacklisted, if CallerConstraints.OperatorBlacklistEnableOTC is set, unless * `msg.sender` is also the `from` address or the transfer is approved by an authorizer for the collection. * @dev Throws when `msg.sender` isn't whitelisted, if CallerConstraints.OperatorWhitelistEnableOTC is set, unless * `msg.sender` is also the `from` address or the transfer is approved by an authorizer for the collection. * @dev Throws when neither `msg.sender` nor `from` are whitelisted, if * CallerConstraints.OperatorWhitelistDisableOTC is set and the transfer * is not approved by an authorizer for the collection. * * @dev <h4>Postconditions:</h4> * 1. Transfer is allowed or denied based on the applied transfer policy. * * @param caller The address initiating the transfer. * @param from The address of the token owner. * @param to The address of the token receiver. */ function validateTransfer(address caller, address from, address to) public view { (bytes4 errorSelector,) = _validateTransfer(_callerAuthorizedCheckCollection, msg.sender, caller, from, to, 0); if (errorSelector != SELECTOR_NO_ERROR) { _revertCustomErrorSelectorAsm(errorSelector); } } /** * @notice Apply the collection transfer policy to a transfer operation of a creator token. * * @dev If the caller is self (Permit-C Processor) it means we have already applied operator validation in the * _beforeTransferFrom callback. In this case, the security policy was already applied and the operator * that used the Permit-C processor passed the security policy check and transfer can be safely allowed. * * @dev The order of checking whitelisted accounts, authorized operator check and whitelisted codehashes * is very deliberate. The order of operations is determined by the most frequently used settings that are * expected in the wild. * * @dev Throws when the collection has enabled account freezing mode and either the `from` or `to` addresses * are on the list of frozen accounts for the collection. * @dev Throws when the collection is set to Level 9 - Soulbound Token. * @dev Throws when the receiver has deployed code and isn't whitelisted, if ReceiverConstraints.NoCode is set * and the transfer is not approved by an authorizer for the collection. * @dev Throws when the receiver has never verified a signature to prove they are an EOA and the receiver * isn't whitelisted, if the ReceiverConstraints.EOA is set and the transfer is not approved by an * authorizer for the collection.. * @dev Throws when `msg.sender` is blacklisted, if CallerConstraints.OperatorBlacklistEnableOTC is set, unless * `msg.sender` is also the `from` address or the transfer is approved by an authorizer for the collection. * @dev Throws when `msg.sender` isn't whitelisted, if CallerConstraints.OperatorWhitelistEnableOTC is set, unless * `msg.sender` is also the `from` address or the transfer is approved by an authorizer for the collection. * @dev Throws when neither `msg.sender` nor `from` are whitelisted, if * CallerConstraints.OperatorWhitelistDisableOTC is set and the transfer * is not approved by an authorizer for the collection. * * @dev <h4>Postconditions:</h4> * 1. Transfer is allowed or denied based on the applied transfer policy. * * @param caller The address initiating the transfer. * @param from The address of the token owner. * @param to The address of the token receiver. * @param tokenId The token id being transferred. */ function validateTransfer(address caller, address from, address to, uint256 tokenId) public view { (bytes4 errorSelector,) = _validateTransfer(_callerAuthorizedCheckToken, msg.sender, caller, from, to, tokenId); if (errorSelector != SELECTOR_NO_ERROR) { _revertCustomErrorSelectorAsm(errorSelector); } } /** * @notice Apply the collection transfer policy to a transfer operation of a creator token. * * @dev If the caller is self (Permit-C Processor) it means we have already applied operator validation in the * _beforeTransferFrom callback. In this case, the security policy was already applied and the operator * that used the Permit-C processor passed the security policy check and transfer can be safely allowed. * * @dev The order of checking whitelisted accounts, authorized operator check and whitelisted codehashes * is very deliberate. The order of operations is determined by the most frequently used settings that are * expected in the wild. * * @dev Throws when the collection has enabled account freezing mode and either the `from` or `to` addresses * are on the list of frozen accounts for the collection. * @dev Throws when the collection is set to Level 9 - Soulbound Token. * @dev Throws when the receiver has deployed code and isn't whitelisted, if ReceiverConstraints.NoCode is set * and the transfer is not approved by an authorizer for the collection. * @dev Throws when the receiver has never verified a signature to prove they are an EOA and the receiver * isn't whitelisted, if the ReceiverConstraints.EOA is set and the transfer is not approved by an * authorizer for the collection.. * @dev Throws when `msg.sender` is blacklisted, if CallerConstraints.OperatorBlacklistEnableOTC is set, unless * `msg.sender` is also the `from` address or the transfer is approved by an authorizer for the collection. * @dev Throws when `msg.sender` isn't whitelisted, if CallerConstraints.OperatorWhitelistEnableOTC is set, unless * `msg.sender` is also the `from` address or the transfer is approved by an authorizer for the collection. * @dev Throws when neither `msg.sender` nor `from` are whitelisted, if * CallerConstraints.OperatorWhitelistDisableOTC is set and the transfer * is not approved by an authorizer for the collection. * * @dev <h4>Postconditions:</h4> * 1. Transfer is allowed or denied based on the applied transfer policy. * * @param caller The address initiating the transfer. * @param from The address of the token owner. * @param to The address of the token receiver. * @param tokenId The token id being transferred. */ function validateTransfer(address caller, address from, address to, uint256 tokenId, uint256 /*amount*/) external { validateTransfer(caller, from, to, tokenId); } /** * @notice Apply the collection transfer policy to a transfer operation of a creator token. * * @dev If the caller is self (Permit-C Processor) it means we have already applied operator validation in the * _beforeTransferFrom callback. In this case, the security policy was already applied and the operator * that used the Permit-C processor passed the security policy check and transfer can be safely allowed. * * @dev The order of checking whitelisted accounts, authorized operator check and whitelisted codehashes * is very deliberate. The order of operations is determined by the most frequently used settings that are * expected in the wild. * * @dev Throws when the collection has enabled account freezing mode and either the `from` or `to` addresses * are on the list of frozen accounts for the collection. * @dev Throws when the collection is set to Level 9 - Soulbound Token. * @dev Throws when the receiver has deployed code and isn't whitelisted, if ReceiverConstraints.NoCode is set * and the transfer is not approved by an authorizer for the collection. * @dev Throws when the receiver has never verified a signature to prove they are an EOA and the receiver * isn't whitelisted, if the ReceiverConstraints.EOA is set and the transfer is not approved by an * authorizer for the collection.. * @dev Throws when `msg.sender` is blacklisted, if CallerConstraints.OperatorBlacklistEnableOTC is set, unless * `msg.sender` is also the `from` address or the transfer is approved by an authorizer for the collection. * @dev Throws when `msg.sender` isn't whitelisted, if CallerConstraints.OperatorWhitelistEnableOTC is set, unless * `msg.sender` is also the `from` address or the transfer is approved by an authorizer for the collection. * @dev Throws when neither `msg.sender` nor `from` are whitelisted, if * CallerConstraints.OperatorWhitelistDisableOTC is set and the transfer * is not approved by an authorizer for the collection. * * @dev <h4>Postconditions:</h4> * 1. Transfer is allowed or denied based on the applied transfer policy. * * @param caller The address initiating the transfer. * @param from The address of the token owner. * @param to The address of the token receiver. */ function applyCollectionTransferPolicy(address caller, address from, address to) external view { validateTransfer(caller, from, to); } /** * @notice Returns the caller and receiver constraints for the specified transfer security level. * * @param level The transfer security level to return the caller and receiver constraints for. * * @return callerConstraints The `CallerConstraints` value for the level. * @return receiverConstraints The `ReceiverConstraints` value for the level. */ function transferSecurityPolicies( uint256 level ) public view returns (uint256 callerConstraints, uint256 receiverConstraints) { callerConstraints = uint8((_callerConstraintsLookup >> (level << 3))); receiverConstraints = uint8((_receiverConstraintsLookup >> (level << 3))); } /** * @notice Sets an operator for an authorized transfer that skips transfer security level * validation for caller and receiver constraints. * * @dev An authorizer *MUST* clear the authorization with a call to `afterAuthorizedTransfer` * to prevent unauthorized transfers of the token. * * @dev Throws when authorization mode is disabled for the collection. * @dev Throws when using the wildcard operator address and the collection does not allow * for wildcard authorized operators. * @dev Throws when the caller is not an allowed authorizer for the collection. * * @dev <h4>Postconditions:</h4> * 1. The `operator` is stored as an authorized operator for transfers. * * @param operator The address of the operator to set as authorized for transfers. * @param token The address of the token to authorize. * @param tokenId The token id to set the authorized operator for. */ function beforeAuthorizedTransfer(address operator, address token, uint256 tokenId) external { _setOperatorInTransientStorage(operator, token, tokenId, false); } /** * @notice Clears the authorized operator for a token to prevent additional transfers that * do not conform to the transfer security level for the token. * * @dev Throws when authorization mode is disabled for the collection. * @dev Throws when using the wildcard operator address and the collection does not allow * for wildcard authorized operators. * @dev Throws when the caller is not an allowed authorizer for the collection. * * @dev <h4>Postconditions:</h4> * 1. The authorized operator for the token is cleared from storage. * * @param token The address of the token to authorize. * @param tokenId The token id to set the authorized operator for. */ function afterAuthorizedTransfer(address token, uint256 tokenId) public { _setOperatorInTransientStorage(address(uint160(uint256(BYTES32_ZERO))), token, tokenId, false); } /** * @notice Sets an operator for an authorized transfer that skips transfer security level * validation for caller and receiver constraints. * @notice This overload of `beforeAuthorizedTransfer` defaults to a tokenId of 0. * * @dev An authorizer *MUST* clear the authorization with a call to `afterAuthorizedTransfer` * to prevent unauthorized transfers of the token. * * @dev Throws when authorization mode is disabled for the collection. * @dev Throws when using the wildcard operator address and the collection does not allow * for wildcard authorized operators. * @dev Throws when the caller is not an allowed authorizer for the collection. * * @dev <h4>Postconditions:</h4> * 1. The `operator` is stored as an authorized operator for transfers. * * @param operator The address of the operator to set as authorized for transfers. * @param token The address of the token to authorize. */ function beforeAuthorizedTransfer(address operator, address token) external { _setOperatorInTransientStorage(operator, token, 0, true); } /** * @notice Clears the authorized operator for a token to prevent additional transfers that * do not conform to the transfer security level for the token. * @notice This overload of `afterAuthorizedTransfer` defaults to a tokenId of 0. * * @dev Throws when authorization mode is disabled for the collection. * @dev Throws when using the wildcard operator address and the collection does not allow * for wildcard authorized operators. * @dev Throws when the caller is not an allowed authorizer for the collection. * * @dev <h4>Postconditions:</h4> * 1. The authorized operator for the token is cleared from storage. * * @param token The address of the token to authorize. */ function afterAuthorizedTransfer(address token) external { afterAuthorizedTransfer(token, 0); } /** * @notice Sets the wildcard operator to authorize any operator to transfer a token while * skipping transfer security level validation for caller and receiver constraints. * * @dev An authorizer *MUST* clear the authorization with a call to `afterAuthorizedTransfer` * to prevent unauthorized transfers of the token. * * @dev Throws when authorization mode is disabled for the collection. * @dev Throws when the collection does not allow for wildcard authorized operators. * @dev Throws when the caller is not an allowed authorizer for the collection. * * @dev <h4>Postconditions:</h4> * 1. The wildcard operator is stored as an authorized operator for transfers. * * @param token The address of the token to authorize. * @param tokenId The token id to set the authorized operator for. */ function beforeAuthorizedTransfer(address token, uint256 tokenId) external { _setOperatorInTransientStorage(WILDCARD_OPERATOR_ADDRESS, token, tokenId, false); } /** * @notice Sets the wildcard operator to authorize any operator to transfer a token while * skipping transfer security level validation for caller and receiver constraints. * * @dev An authorizer *MUST* clear the authorization with a call to `afterAuthorizedTransfer` * to prevent unauthorized transfers of the token. * * @dev Throws when authorization mode is disabled for the collection. * @dev Throws when the collection does not allow for wildcard authorized operators. * @dev Throws when the caller is not an allowed authorizer for the collection. * * @dev <h4>Postconditions:</h4> * 1. The wildcard operator is stored as an authorized operator for transfers. * * @param token The address of the token to authorize. * @param tokenId The token id to set the authorized operator for. */ function beforeAuthorizedTransferWithAmount(address token, uint256 tokenId, uint256 /*amount*/) external { _setOperatorInTransientStorage(WILDCARD_OPERATOR_ADDRESS, token, tokenId, false); } /** * @notice Clears the authorized operator for a token to prevent additional transfers that * do not conform to the transfer security level for the token. * * @dev Throws when authorization mode is disabled for the collection. * @dev Throws when using the wildcard operator address and the collection does not allow * for wildcard authorized operators. * @dev Throws when the caller is not an allowed authorizer for the collection. * * @dev <h4>Postconditions:</h4> * 1. The authorized operator for the token is cleared from storage. * * @param token The address of the token to authorize. * @param tokenId The token id to set the authorized operator for. */ function afterAuthorizedTransferWithAmount(address token, uint256 tokenId) external { afterAuthorizedTransfer(token, tokenId); } /*************************************************************************/ /* LIST MANAGEMENT */ /*************************************************************************/ /** * @notice Creates a new list id. The list id is a handle to allow editing of blacklisted and whitelisted accounts * and codehashes. * * @dev <h4>Postconditions:</h4> * 1. A new list with the specified name is created. * 2. The caller is set as the owner of the new list. * 3. A `CreatedList` event is emitted. * 4. A `ReassignedListOwnership` event is emitted. * * @param name The name of the new list. * @return id The id of the new list. */ function createList(string calldata name) public returns (uint120 id) { unchecked { id = ++lastListId; } listOwners[id] = msg.sender; emit CreatedList(id, name); emit ReassignedListOwnership(id, msg.sender); } /** * @notice Creates a new list id, and copies all blacklisted and whitelisted accounts and codehashes from the * specified source list. * * @dev <h4>Postconditions:</h4> * 1. A new list with the specified name is created. * 2. The caller is set as the owner of the new list. * 3. A `CreatedList` event is emitted. * 4. A `ReassignedListOwnership` event is emitted. * 5. All blacklisted and whitelisted accounts and codehashes from the specified source list are copied * to the new list. * 6. An `AddedAccountToList` event is emitted for each blacklisted and whitelisted account copied. * 7. An `AddedCodeHashToList` event is emitted for each blacklisted and whitelisted codehash copied. * * @param name The name of the new list. * @param sourceListId The id of the source list to copy from. * @return id The id of the new list. */ function createListCopy(string calldata name, uint120 sourceListId) external returns (uint120 id) { unchecked { id = ++lastListId; } unchecked { if (sourceListId > id - 1) { revert CreatorTokenTransferValidator__ListDoesNotExist(); } } listOwners[id] = msg.sender; emit CreatedList(id, name); emit ReassignedListOwnership(id, msg.sender); List storage sourceBlacklist = blacklists[sourceListId]; List storage sourceWhitelist = whitelists[sourceListId]; List storage sourceAuthorizers = authorizers[sourceListId]; List storage targetBlacklist = blacklists[id]; List storage targetWhitelist = whitelists[id]; List storage targetAuthorizers = authorizers[id]; _copyAddressSet(LIST_TYPE_BLACKLIST, id, sourceBlacklist, targetBlacklist); _copyBytes32Set(LIST_TYPE_BLACKLIST, id, sourceBlacklist, targetBlacklist); _copyAddressSet(LIST_TYPE_WHITELIST, id, sourceWhitelist, targetWhitelist); _copyBytes32Set(LIST_TYPE_WHITELIST, id, sourceWhitelist, targetWhitelist); _copyAddressSet(LIST_TYPE_AUTHORIZERS, id, sourceAuthorizers, targetAuthorizers); _copyBytes32Set(LIST_TYPE_AUTHORIZERS, id, sourceAuthorizers, targetAuthorizers); } /** * @notice Transfer ownership of a list to a new owner. * * @dev Throws when the new owner is the zero address. * @dev Throws when the caller does not own the specified list. * @dev Throws when list id is zero (default list). * * @dev <h4>Postconditions:</h4> * 1. The list ownership is transferred to the new owner. * 2. A `ReassignedListOwnership` event is emitted. * * @param id The id of the list. * @param newOwner The address of the new owner. */ function reassignOwnershipOfList(uint120 id, address newOwner) public { if(newOwner == address(0)) { revert CreatorTokenTransferValidator__ListOwnershipCannotBeTransferredToZeroAddress(); } _reassignOwnershipOfList(id, newOwner); } /** * @notice Renounce the ownership of a list, rendering the list immutable. * * @dev Throws when the caller does not own the specified list. * @dev Throws when list id is zero (default list). * * @dev <h4>Postconditions:</h4> * 1. The ownership of the specified list is renounced. * 2. A `ReassignedListOwnership` event is emitted. * * @param id The id of the list. */ function renounceOwnershipOfList(uint120 id) public { _reassignOwnershipOfList(id, address(0)); } /** * @notice Set the transfer security level, authorization mode and account freezing mode settings of a collection. * * @dev Throws when the caller is neither collection contract, nor the owner or admin of the specified collection. * * @dev <h4>Postconditions:</h4> * 1. The transfer security level of the specified collection is set to the new value. * 2. The authorization mode setting of the specified collection is set to the new value. * 3. The authorization wildcard operator mode setting of the specified collection is set to the new value. * 4. The account freezing mode setting of the specified collection is set to the new value. * 5. A `SetTransferSecurityLevel` event is emitted. * 6. A `SetAuthorizationModeEnabled` event is emitted. * 7. A `SetAccountFreezingModeEnabled` event is emitted. * * @param collection The address of the collection. * @param level The new transfer security level to apply. * @param disableAuthorizationMode Flag if the collection allows for authorizer mode. * @param disableWildcardOperators Flag if the authorizer can set wildcard operators. * @param enableAccountFreezingMode Flag if the collection is using account freezing. */ function setTransferSecurityLevelOfCollection( address collection, uint8 level, bool disableAuthorizationMode, bool disableWildcardOperators, bool enableAccountFreezingMode) external { if (level > TRANSFER_SECURITY_LEVEL_NINE) { revert CreatorTokenTransferValidator__InvalidTransferSecurityLevel(); } _requireCallerIsNFTOrContractOwnerOrAdmin(collection); collectionSecurityPolicies[collection].transferSecurityLevel = level; collectionSecurityPolicies[collection].disableAuthorizationMode = disableAuthorizationMode; collectionSecurityPolicies[collection].authorizersCannotSetWildcardOperators = disableWildcardOperators; collectionSecurityPolicies[collection].enableAccountFreezingMode = enableAccountFreezingMode; emit SetTransferSecurityLevel(collection, level); emit SetAuthorizationModeEnabled(collection, disableAuthorizationMode, disableWildcardOperators); emit SetAccountFreezingModeEnabled(collection, enableAccountFreezingMode); } /** * @notice Set the token type setting of a collection. * * @dev Throws when the caller is neither collection contract, nor the owner or admin of the specified collection. * * @dev <h4>Postconditions:</h4> * 1. The token type of the specified collection is set to the new value. * 2. A `SetTokenType` event is emitted. * * @param collection The address of the collection. * @param tokenType The new transfer security level to apply. */ function setTokenTypeOfCollection( address collection, uint16 tokenType ) external { _requireCallerIsNFTOrContractOwnerOrAdmin(collection); collectionSecurityPolicies[collection].tokenType = tokenType; emit SetTokenType(collection, tokenType); } /** * @notice Applies the specified list to a collection. * * @dev Throws when the caller is neither collection contract, nor the owner or admin of the specified collection. * @dev Throws when the specified list id does not exist. * * @dev <h4>Postconditions:</h4> * 1. The list of the specified collection is set to the new value. * 2. An `AppliedListToCollection` event is emitted. * * @param collection The address of the collection. * @param id The id of the operator whitelist. */ function applyListToCollection(address collection, uint120 id) public { _requireCallerIsNFTOrContractOwnerOrAdmin(collection); if (id > lastListId) { revert CreatorTokenTransferValidator__ListDoesNotExist(); } collectionSecurityPolicies[collection].listId = id; emit AppliedListToCollection(collection, id); } /** * @notice Adds accounts to the frozen accounts list of a collection. * * @dev Throws when the caller is neither collection contract, nor the owner or admin of the specified collection. * * @dev <h4>Postconditions:</h4> * 1. The accounts are added to the list of frozen accounts for a collection. * 2. A `AccountFrozenForCollection` event is emitted for each account added to the list. * * @param collection The address of the collection. * @param accountsToFreeze The list of accounts to added to frozen accounts. */ function freezeAccountsForCollection(address collection, address[] calldata accountsToFreeze) external { _requireCallerIsNFTOrContractOwnerOrAdmin(collection); AccountList storage accounts = frozenAccounts[collection]; for (uint256 i = 0; i < accountsToFreeze.length;) { address accountToFreeze = accountsToFreeze[i]; if (accounts.enumerableAccounts.add(accountToFreeze)) { emit AccountFrozenForCollection(collection, accountToFreeze); accounts.nonEnumerableAccounts[accountToFreeze] = true; } unchecked { ++i; } } } /** * @notice Removes accounts to the frozen accounts list of a collection. * * @dev Throws when the caller is neither collection contract, nor the owner or admin of the specified collection. * * @dev <h4>Postconditions:</h4> * 1. The accounts are removed from the list of frozen accounts for a collection. * 2. A `AccountUnfrozenForCollection` event is emitted for each account removed from the list. * * @param collection The address of the collection. * @param accountsToUnfreeze The list of accounts to remove from frozen accounts. */ function unfreezeAccountsForCollection(address collection, address[] calldata accountsToUnfreeze) external { _requireCallerIsNFTOrContractOwnerOrAdmin(collection); AccountList storage accounts = frozenAccounts[collection]; for (uint256 i = 0; i < accountsToUnfreeze.length;) { address accountToUnfreeze = accountsToUnfreeze[i]; if (accounts.enumerableAccounts.remove(accountToUnfreeze)) { emit AccountUnfrozenForCollection(collection, accountToUnfreeze); accounts.nonEnumerableAccounts[accountToUnfreeze] = false; } unchecked { ++i; } } } /** * @notice Get the security policy of the specified collection. * @param collection The address of the collection. * @return The security policy of the specified collection, which includes: * Transfer security level, operator whitelist id, permitted contract receiver allowlist id, * authorizer mode, if authorizer can set a wildcard operator, and if account freezing is * enabled. */ function getCollectionSecurityPolicy( address collection ) external view returns (CollectionSecurityPolicyV3 memory) { return collectionSecurityPolicies[collection]; } /** * @notice Adds one or more accounts to a blacklist. * * @dev Throws when the caller does not own the specified list. * @dev Throws when the accounts array is empty. * * @dev <h4>Postconditions:</h4> * 1. Accounts not previously in the list are added. * 2. An `AddedAccountToList` event is emitted for each account that is newly added to the list. * * @param id The id of the list. * @param accounts The addresses of the accounts to add. */ function addAccountsToBlacklist( uint120 id, address[] calldata accounts ) external { _addAccountsToList(blacklists[id], LIST_TYPE_BLACKLIST, id, accounts); } /** * @notice Adds one or more accounts to a whitelist. * * @dev Throws when the caller does not own the specified list. * @dev Throws when the accounts array is empty. * * @dev <h4>Postconditions:</h4> * 1. Accounts not previously in the list are added. * 2. An `AddedAccountToList` event is emitted for each account that is newly added to the list. * * @param id The id of the list. * @param accounts The addresses of the accounts to add. */ function addAccountsToWhitelist( uint120 id, address[] calldata accounts ) external { _addAccountsToList(whitelists[id], LIST_TYPE_WHITELIST, id, accounts); } /** * @notice Adds one or more accounts to authorizers. * * @dev Throws when the caller does not own the specified list. * @dev Throws when the accounts array is empty. * * @dev <h4>Postconditions:</h4> * 1. Accounts not previously in the list are added. * 2. An `AddedAccountToList` event is emitted for each account that is newly added to the list. * * @param id The id of the list. * @param accounts The addresses of the accounts to add. */ function addAccountsToAuthorizers( uint120 id, address[] calldata accounts ) external { _addAccountsToList(authorizers[id], LIST_TYPE_AUTHORIZERS, id, accounts); } /** * @notice Adds one or more codehashes to a blacklist. * * @dev Throws when the caller does not own the specified list. * @dev Throws when the codehashes array is empty. * @dev Throws when a codehash is zero. * * @dev <h4>Postconditions:</h4> * 1. Codehashes not previously in the list are added. * 2. An `AddedCodeHashToList` event is emitted for each codehash that is newly added to the list. * * @param id The id of the list. * @param codehashes The codehashes to add. */ function addCodeHashesToBlacklist( uint120 id, bytes32[] calldata codehashes ) external { _addCodeHashesToList(blacklists[id], LIST_TYPE_BLACKLIST, id, codehashes); } /** * @notice Adds one or more codehashes to a whitelist. * * @dev Throws when the caller does not own the specified list. * @dev Throws when the codehashes array is empty. * @dev Throws when a codehash is zero. * * @dev <h4>Postconditions:</h4> * 1. Codehashes not previously in the list are added. * 2. An `AddedCodeHashToList` event is emitted for each codehash that is newly added to the list. * * @param id The id of the list. * @param codehashes The codehashes to add. */ function addCodeHashesToWhitelist( uint120 id, bytes32[] calldata codehashes ) external { _addCodeHashesToList(whitelists[id], LIST_TYPE_WHITELIST, id, codehashes); } /** * @notice Removes one or more accounts from a blacklist. * * @dev Throws when the caller does not own the specified list. * @dev Throws when the accounts array is empty. * * @dev <h4>Postconditions:</h4> * 1. Accounts previously in the list are removed. * 2. A `RemovedAccountFromList` event is emitted for each account that is removed from the list. * * @param id The id of the list. * @param accounts The addresses of the accounts to remove. */ function removeAccountsFromBlacklist( uint120 id, address[] calldata accounts ) external { _removeAccountsFromList(blacklists[id], LIST_TYPE_BLACKLIST, id, accounts); } /** * @notice Removes one or more accounts from a whitelist. * * @dev Throws when the caller does not own the specified list. * @dev Throws when the accounts array is empty. * * @dev <h4>Postconditions:</h4> * 1. Accounts previously in the list are removed. * 2. A `RemovedAccountFromList` event is emitted for each account that is removed from the list. * * @param id The id of the list. * @param accounts The addresses of the accounts to remove. */ function removeAccountsFromWhitelist( uint120 id, address[] calldata accounts ) external { _removeAccountsFromList(whitelists[id], LIST_TYPE_WHITELIST, id, accounts); } /** * @notice Removes one or more accounts from authorizers. * * @dev Throws when the caller does not own the specified list. * @dev Throws when the accounts array is empty. * * @dev <h4>Postconditions:</h4> * 1. Accounts previously in the list are removed. * 2. A `RemovedAccountFromList` event is emitted for each account that is removed from the list. * * @param id The id of the list. * @param accounts The addresses of the accounts to remove. */ function removeAccountsFromAuthorizers( uint120 id, address[] calldata accounts ) external { _removeAccountsFromList(authorizers[id], LIST_TYPE_AUTHORIZERS, id, accounts); } /** * @notice Removes one or more codehashes from a blacklist. * * @dev Throws when the caller does not own the specified list. * @dev Throws when the codehashes array is empty. * * @dev <h4>Postconditions:</h4> * 1. Codehashes previously in the list are removed. * 2. A `RemovedCodeHashFromList` event is emitted for each codehash that is removed from the list. * * @param id The id of the list. * @param codehashes The codehashes to remove. */ function removeCodeHashesFromBlacklist( uint120 id, bytes32[] calldata codehashes ) external { _removeCodeHashesFromList(blacklists[id], LIST_TYPE_BLACKLIST, id, codehashes); } /** * @notice Removes one or more codehashes from a whitelist. * * @dev Throws when the caller does not own the specified list. * @dev Throws when the codehashes array is empty. * * @dev <h4>Postconditions:</h4> * 1. Codehashes previously in the list are removed. * 2. A `RemovedCodeHashFromList` event is emitted for each codehash that is removed from the list. * * @param id The id of the list. * @param codehashes The codehashes to remove. */ function removeCodeHashesFromWhitelist( uint120 id, bytes32[] calldata codehashes ) external { _removeCodeHashesFromList(whitelists[id], LIST_TYPE_WHITELIST, id, codehashes); } /** * @notice Get blacklisted accounts by list id. * @param id The id of the list. * @return An array of blacklisted accounts. */ function getBlacklistedAccounts(uint120 id) public view returns (address[] memory) { return blacklists[id].enumerableAccounts.values(); } /** * @notice Get whitelisted accounts by list id. * @param id The id of the list. * @return An array of whitelisted accounts. */ function getWhitelistedAccounts(uint120 id) public view returns (address[] memory) { return whitelists[id].enumerableAccounts.values(); } /** * @notice Get authorizor accounts by list id. * @param id The id of the list. * @return An array of authorizer accounts. */ function getAuthorizerAccounts(uint120 id) public view returns (address[] memory) { return authorizers[id].enumerableAccounts.values(); } /** * @notice Get blacklisted codehashes by list id. * @param id The id of the list. * @return An array of blacklisted codehashes. */ function getBlacklistedCodeHashes(uint120 id) public view returns (bytes32[] memory) { return blacklists[id].enumerableCodehashes.values(); } /** * @notice Get whitelisted codehashes by list id. * @param id The id of the list. * @return An array of whitelisted codehashes. */ function getWhitelistedCodeHashes(uint120 id) public view returns (bytes32[] memory) { return whitelists[id].enumerableCodehashes.values(); } /** * @notice Check if an account is blacklisted in a specified list. * @param id The id of the list. * @param account The address of the account to check. * @return True if the account is blacklisted in the specified list, false otherwise. */ function isAccountBlacklisted(uint120 id, address account) public view returns (bool) { return blacklists[id].nonEnumerableAccounts[account]; } /** * @notice Check if an account is whitelisted in a specified list. * @param id The id of the list. * @param account The address of the account to check. * @return True if the account is whitelisted in the specified list, false otherwise. */ function isAccountWhitelisted(uint120 id, address account) public view returns (bool) { return whitelists[id].nonEnumerableAccounts[account]; } /** * @notice Check if an account is an authorizer in a specified list. * @param id The id of the list. * @param account The address of the account to check. * @return True if the account is an authorizer in the specified list, false otherwise. */ function isAccountAuthorizer(uint120 id, address account) public view returns (bool) { return authorizers[id].nonEnumerableAccounts[account]; } /** * @notice Check if a codehash is blacklisted in a specified list. * @param id The id of the list. * @param codehash The codehash to check. * @return True if the codehash is blacklisted in the specified list, false otherwise. */ function isCodeHashBlacklisted(uint120 id, bytes32 codehash) public view returns (bool) { return blacklists[id].nonEnumerableCodehashes[codehash]; } /** * @notice Check if a codehash is whitelisted in a specified list. * @param id The id of the list. * @param codehash The codehash to check. * @return True if the codehash is whitelisted in the specified list, false otherwise. */ function isCodeHashWhitelisted(uint120 id, bytes32 codehash) public view returns (bool) { return whitelists[id].nonEnumerableCodehashes[codehash]; } /** * @notice Get blacklisted accounts by collection. * @param collection The address of the collection. * @return An array of blacklisted accounts. */ function getBlacklistedAccountsByCollection(address collection) external view returns (address[] memory) { return getBlacklistedAccounts(collectionSecurityPolicies[collection].listId); } /** * @notice Get whitelisted accounts by collection. * @param collection The address of the collection. * @return An array of whitelisted accounts. */ function getWhitelistedAccountsByCollection(address collection) external view returns (address[] memory) { return getWhitelistedAccounts(collectionSecurityPolicies[collection].listId); } /** * @notice Get authorizer accounts by collection. * @param collection The address of the collection. * @return An array of authorizer accounts. */ function getAuthorizerAccountsByCollection(address collection) external view returns (address[] memory) { return getAuthorizerAccounts(collectionSecurityPolicies[collection].listId); } /** * @notice Get frozen accounts by collection. * @param collection The address of the collection. * @return An array of frozen accounts. */ function getFrozenAccountsByCollection(address collection) external view returns (address[] memory) { return frozenAccounts[collection].enumerableAccounts.values(); } /** * @notice Get blacklisted codehashes by collection. * @param collection The address of the collection. * @return An array of blacklisted codehashes. */ function getBlacklistedCodeHashesByCollection(address collection) external view returns (bytes32[] memory) { return getBlacklistedCodeHashes(collectionSecurityPolicies[collection].listId); } /** * @notice Get whitelisted codehashes by collection. * @param collection The address of the collection. * @return An array of whitelisted codehashes. */ function getWhitelistedCodeHashesByCollection(address collection) external view returns (bytes32[] memory) { return getWhitelistedCodeHashes(collectionSecurityPolicies[collection].listId); } /** * @notice Check if an account is blacklisted by a specified collection. * @param collection The address of the collection. * @param account The address of the account to check. * @return True if the account is blacklisted by the specified collection, false otherwise. */ function isAccountBlacklistedByCollection(address collection, address account) external view returns (bool) { return isAccountBlacklisted(collectionSecurityPolicies[collection].listId, account); } /** * @notice Check if an account is whitelisted by a specified collection. * @param collection The address of the collection. * @param account The address of the account to check. * @return True if the account is whitelisted by the specified collection, false otherwise. */ function isAccountWhitelistedByCollection(address collection, address account) external view returns (bool) { return isAccountWhitelisted(collectionSecurityPolicies[collection].listId, account); } /** * @notice Check if an account is an authorizer of a specified collection. * @param collection The address of the collection. * @param account The address of the account to check. * @return True if the account is an authorizer by the specified collection, false otherwise. */ function isAccountAuthorizerOfCollection(address collection, address account) external view returns (bool) { return isAccountAuthorizer(collectionSecurityPolicies[collection].listId, account); } /** * @notice Check if an account is frozen for a specified collection. * @param collection The address of the collection. * @param account The address of the account to check. * @return True if the account is frozen by the specified collection, false otherwise. */ function isAccountFrozenForCollection(address collection, address account) external view returns (bool) { return frozenAccounts[collection].nonEnumerableAccounts[account]; } /** * @notice Check if a codehash is blacklisted by a specified collection. * @param collection The address of the collection. * @param codehash The codehash to check. * @return True if the codehash is blacklisted by the specified collection, false otherwise. */ function isCodeHashBlacklistedByCollection(address collection, bytes32 codehash) external view returns (bool) { return isCodeHashBlacklisted(collectionSecurityPolicies[collection].listId, codehash); } /** * @notice Check if a codehash is whitelisted by a specified collection. * @param collection The address of the collection. * @param codehash The codehash to check. * @return True if the codehash is whitelisted by the specified collection, false otherwise. */ function isCodeHashWhitelistedByCollection(address collection, bytes32 codehash) external view returns (bool) { return isCodeHashWhitelisted(collectionSecurityPolicies[collection].listId, codehash); } /// @notice Returns true if the specified account has verified a signature on the registry, false otherwise. function isVerifiedEOA(address account) public view returns (bool) { return IEOARegistry(_eoaRegistry).isVerifiedEOA(account); } /// @notice ERC-165 Interface Support /// @dev Do not remove LEGACY from this contract or future contracts. /// Doing so will break backwards compatibility with V1 and V2 creator tokens. function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) { return interfaceId == LEGACY_TRANSFER_VALIDATOR_INTERFACE_ID || interfaceId == type(ITransferValidator).interfaceId || interfaceId == type(IPermitC).interfaceId || interfaceId == type(IEOARegistry).interfaceId || super.supportsInterface(interfaceId); } /*************************************************************************/ /* HELPERS */ /*************************************************************************/ /** * @notice Reverts the transaction if the caller is not the owner or assigned the default * @notice admin role of the contract at `tokenAddress`. * * @dev Throws when the caller is neither owner nor assigned the default admin role. * * @param tokenAddress The contract address of the token to check permissions for. */ function _requireCallerIsNFTOrContractOwnerOrAdmin(address tokenAddress) internal view { address caller = msg.sender; if(caller == tokenAddress) { return; } (address contractOwner,) = _safeOwner(tokenAddress); if(caller == contractOwner) { return; } (bool callerIsContractAdmin,) = _safeHasRole(tokenAddress, DEFAULT_ACCESS_CONTROL_ADMIN_ROLE, caller); if(callerIsContractAdmin) { return; } revert CreatorTokenTransferValidator__CallerMustHaveElevatedPermissionsForSpecifiedNFT(); } /** * @notice Copies all addresses in `ptrFromList` to `ptrToList`. * * @dev This function will copy all addresses from one list to another list. * @dev Note: If used to copy adddresses to an existing list the current list contents will not be * @dev deleted before copying. New addresses will be appeneded to the end of the list and the * @dev non-enumerable mapping key value will be set to true. * * @dev <h4>Postconditions:</h4> * 1. Addresses in from list that are not already present in to list are added to the to list. * 2. Emits an `AddedAccountToList` event for each address copied to the list. * * @param listType The type of list addresses are being copied from and to. * @param destinationListId The id of the list being copied to. * @param ptrFromList The storage pointer for the list being copied from. * @param ptrToList The storage pointer for the list being copied to. */ function _copyAddressSet( uint8 listType, uint120 destinationListId, List storage ptrFromList, List storage ptrToList ) private { EnumerableSet.AddressSet storage ptrFromSet = ptrFromList.enumerableAccounts; EnumerableSet.AddressSet storage ptrToSet = ptrToList.enumerableAccounts; mapping (address => bool) storage ptrToNonEnumerableSet = ptrToList.nonEnumerableAccounts; uint256 sourceLength = ptrFromSet.length(); address account; for (uint256 i = 0; i < sourceLength;) { account = ptrFromSet.at(i); if (ptrToSet.add(account)) { emit AddedAccountToList(listType, destinationListId, account); ptrToNonEnumerableSet[account] = true; } unchecked { ++i; } } } /** * @notice Copies all codehashes in `ptrFromList` to `ptrToList`. * * @dev This function will copy all codehashes from one list to another list. * @dev Note: If used to copy codehashes to an existing list the current list contents will not be * @dev deleted before copying. New codehashes will be appeneded to the end of the list and the * @dev non-enumerable mapping key value will be set to true. * * @dev <h4>Postconditions:</h4> * 1. Codehashes in from list that are not already present in to list are added to the to list. * 2. Emits an `AddedCodeHashToList` event for each codehash copied to the list. * * @param listType The type of list codehashes are being copied from and to. * @param destinationListId The id of the list being copied to. * @param ptrFromList The storage pointer for the list being copied from. * @param ptrToList The storage pointer for the list being copied to. */ function _copyBytes32Set( uint8 listType, uint120 destinationListId, List storage ptrFromList, List storage ptrToList ) private { EnumerableSet.Bytes32Set storage ptrFromSet = ptrFromList.enumerableCodehashes; EnumerableSet.Bytes32Set storage ptrToSet = ptrToList.enumerableCodehashes; mapping (bytes32 => bool) storage ptrToNonEnumerableSet = ptrToList.nonEnumerableCodehashes; uint256 sourceLength = ptrFromSet.length(); bytes32 codehash; for (uint256 i = 0; i < sourceLength;) { codehash = ptrFromSet.at(i); if (ptrToSet.add(codehash)) { emit AddedCodeHashToList(listType, destinationListId, codehash); ptrToNonEnumerableSet[codehash] = true; } unchecked { ++i; } } } /** * @notice Adds one or more accounts to a list. * * @dev <h4>Postconditions:</h4> * 1. Accounts that were not previously in the list are added to the list. * 2. An `AddedAccountToList` event is emitted for each account that was not * previously on the list. * * @param list The storage pointer for the list to add accounts to. * @param listType The type of list the accounts are being added to. * @param id The id of the list the accounts are being added to. * @param accounts An array of accounts to add to the list. */ function _addAccountsToList( List storage list, uint8 listType, uint120 id, address[] calldata accounts ) internal onlyListOwner(id) { address account; for (uint256 i = 0; i < accounts.length;) { account = accounts[i]; if (list.enumerableAccounts.add(account)) { emit AddedAccountToList(listType, id, account); list.nonEnumerableAccounts[account] = true; } unchecked { ++i; } } } /** * @notice Adds one or more codehashes to a list. * * @dev <h4>Postconditions:</h4> * 1. Codehashes that were not previously in the list are added to the list. * 2. An `AddedCodeHashToList` event is emitted for each codehash that was not * previously on the list. * * @param list The storage pointer for the list to add codehashes to. * @param listType The type of list the codehashes are being added to. * @param id The id of the list the codehashes are being added to. * @param codehashes An array of codehashes to add to the list. */ function _addCodeHashesToList( List storage list, uint8 listType, uint120 id, bytes32[] calldata codehashes ) internal onlyListOwner(id) { bytes32 codehash; for (uint256 i = 0; i < codehashes.length;) { codehash = codehashes[i]; if (list.enumerableCodehashes.add(codehash)) { emit AddedCodeHashToList(listType, id, codehash); list.nonEnumerableCodehashes[codehash] = true; } unchecked { ++i; } } } /** * @notice Removes one or more accounts from a list. * * @dev <h4>Postconditions:</h4> * 1. Accounts that were previously in the list are removed from the list. * 2. An `RemovedAccountFromList` event is emitted for each account that was * previously on the list. * * @param list The storage pointer for the list to remove accounts from. * @param listType The type of list the accounts are being removed from. * @param id The id of the list the accounts are being removed from. * @param accounts An array of accounts to remove from the list. */ function _removeAccountsFromList( List storage list, uint8 listType, uint120 id, address[] memory accounts ) internal onlyListOwner(id) { address account; for (uint256 i = 0; i < accounts.length;) { account = accounts[i]; if (list.enumerableAccounts.remove(account)) { emit RemovedAccountFromList(listType, id, account); delete list.nonEnumerableAccounts[account]; } unchecked { ++i; } } } /** * @notice Removes one or more codehashes from a list. * * @dev <h4>Postconditions:</h4> * 1. Codehashes that were previously in the list are removed from the list. * 2. An `RemovedCodeHashFromList` event is emitted for each codehash that was * previously on the list. * * @param list The storage pointer for the list to remove codehashes from. * @param listType The type of list the codehashes are being removed from. * @param id The id of the list the codehashes are being removed from. * @param codehashes An array of codehashes to remove from the list. */ function _removeCodeHashesFromList( List storage list, uint8 listType, uint120 id, bytes32[] calldata codehashes ) internal onlyListOwner(id) { bytes32 codehash; for (uint256 i = 0; i < codehashes.length;) { codehash = codehashes[i]; if (list.enumerableCodehashes.remove(codehash)) { emit RemovedCodeHashFromList(listType, id, codehash); delete list.nonEnumerableCodehashes[codehash]; } unchecked { ++i; } } } /** * @notice Sets the owner of list `id` to `newOwner`. * * @dev Throws when the caller is not the owner of the list. * * @dev <h4>Postconditions:</h4> * 1. The owner of list `id` is set to `newOwner`. * 2. Emits a `ReassignedListOwnership` event. * * @param id The id of the list to reassign ownership of. * @param newOwner The account to assign ownership of the list to. */ function _reassignOwnershipOfList(uint120 id, address newOwner) private { if (id == DEFAULT_LIST_ID) { revert CreatorTokenTransferValidator__CannotReassignOwnershipOfDefaultList(); } _requireCallerOwnsList(id); listOwners[id] = newOwner; emit ReassignedListOwnership(id, newOwner); } /** * @notice Requires the caller to be the owner of list `id`. * * @dev Throws when the caller is not the owner of the list. * * @param id The id of the list to check ownership of. */ function _requireCallerOwnsList(uint120 id) private view { if (msg.sender != listOwners[id]) { revert CreatorTokenTransferValidator__CallerDoesNotOwnList(); } } /** * @dev Internal function used to efficiently retrieve the code length of `account`. * * @param account The address to get the deployed code length for. * * @return length The length of deployed code at the address. */ function _getCodeLengthAsm(address account) internal view returns (uint256 length) { assembly { length := extcodesize(account) } } /** * @dev Internal function used to efficiently retrieve the codehash of `account`. * * @param account The address to get the deployed codehash for. * * @return codehash The codehash of the deployed code at the address. */ function _getCodeHashAsm(address account) internal view returns (bytes32 codehash) { assembly { codehash := extcodehash(account) } } /** * @dev Hook that is called before any permitted token transfer that goes through Permit-C. * Applies the collection transfer policy, using the operator that called Permit-C as the caller. * This allows creator token standard protections to extend to permitted transfers. * * @param token The collection address of the token being transferred. * @param from The address of the token owner. * @param to The address of the token receiver. * @param id The token id being transferred. */ function _beforeTransferFrom( uint256 tokenType, address token, address from, address to, uint256 id, uint256 /*amount*/ ) internal override returns (bool isError) { (bytes4 selector, uint16 collectionTokenType) = _validateTransfer(_callerAuthorizedCheckToken, token, msg.sender, from, to, id); if (collectionTokenType == DEFAULT_TOKEN_TYPE || collectionTokenType == tokenType) { isError = SELECTOR_NO_ERROR != selector; } else { revert CreatorTokenTransferValidator__TokenTypesDoNotMatch(); } } /** * @notice Apply the collection transfer policy to a transfer operation of a creator token. * * @dev If the caller is self (Permit-C Processor) it means we have already applied operator validation in the * _beforeTransferFrom callback. In this case, the security policy was already applied and the operator * that used the Permit-C processor passed the security policy check and transfer can be safely allowed. * * @dev The order of checking whitelisted accounts, authorized operator check and whitelisted codehashes * is very deliberate. The order of operations is determined by the most frequently used settings that are * expected in the wild. * * @dev Throws when the collection has enabled account freezing mode and either the `from` or `to` addresses * are on the list of frozen accounts for the collection. * @dev Throws when the collection is set to Level 9 - Soulbound Token. * @dev Throws when the receiver has deployed code and isn't whitelisted, if ReceiverConstraints.NoCode is set * and the transfer is not approved by an authorizer for the collection. * @dev Throws when the receiver has never verified a signature to prove they are an EOA and the receiver * isn't whitelisted, if the ReceiverConstraints.EOA is set and the transfer is not approved by an * authorizer for the collection.. * @dev Throws when `msg.sender` is blacklisted, if CallerConstraints.OperatorBlacklistEnableOTC is set, unless * `msg.sender` is also the `from` address or the transfer is approved by an authorizer for the collection. * @dev Throws when `msg.sender` isn't whitelisted, if CallerConstraints.OperatorWhitelistEnableOTC is set, unless * `msg.sender` is also the `from` address or the transfer is approved by an authorizer for the collection. * @dev Throws when neither `msg.sender` nor `from` are whitelisted, if * CallerConstraints.OperatorWhitelistDisableOTC is set and the transfer * is not approved by an authorizer for the collection. * * @dev <h4>Postconditions:</h4> * 1. Transfer is allowed or denied based on the applied transfer policy. * * @param collection The collection address of the token being transferred. * @param caller The address initiating the transfer. * @param from The address of the token owner. * @param to The address of the token receiver. * @param tokenId The token id being transferred. * * @return The selector value for an error if the transfer is not allowed, `SELECTOR_NO_ERROR` if the transfer is allowed. */ function _validateTransfer( function(address,address,uint256) internal view returns(bool) _callerAuthorizedParam, address collection, address caller, address from, address to, uint256 tokenId ) internal view returns (bytes4,uint16) { if (caller == address(this)) { // If the caller is self (Permit-C Processor) it means we have already applied operator validation in the // _beforeTransferFrom callback. In this case, the security policy was already applied and the operator // that used the Permit-C processor passed the security policy check and transfer can be safely allowed. return (SELECTOR_NO_ERROR, DEFAULT_TOKEN_TYPE); } CollectionSecurityPolicyV3 storage collectionSecurityPolicy = collectionSecurityPolicies[collection]; uint120 listId = collectionSecurityPolicy.listId; (uint256 callerConstraints, uint256 receiverConstraints) = transferSecurityPolicies(collectionSecurityPolicy.transferSecurityLevel); if (collectionSecurityPolicy.enableAccountFreezingMode) { AccountList storage frozenAccountList = frozenAccounts[collection]; if (frozenAccountList.nonEnumerableAccounts[from]) { return (CreatorTokenTransferValidator__SenderAccountIsFrozen.selector, DEFAULT_TOKEN_TYPE); } if (frozenAccountList.nonEnumerableAccounts[to]) { return (CreatorTokenTransferValidator__ReceiverAccountIsFrozen.selector, DEFAULT_TOKEN_TYPE); } } if (callerConstraints == CALLER_CONSTRAINTS_SBT) { return (CreatorTokenTransferValidator__TokenIsSoulbound.selector, DEFAULT_TOKEN_TYPE); } List storage whitelist = whitelists[listId]; if (receiverConstraints == RECEIVER_CONSTRAINTS_NO_CODE) { if (_getCodeLengthAsm(to) > 0) { if (!whitelist.nonEnumerableAccounts[to]) { // Cache _callerAuthorizedParam on stack to avoid stack too deep function(address,address,uint256) internal view returns(bool) _callerAuthorized = _callerAuthorizedParam; if(!_callerAuthorized(collection, caller, tokenId)) { if (!whitelist.nonEnumerableCodehashes[_getCodeHashAsm(to)]) { return (CreatorTokenTransferValidator__ReceiverMustNotHaveDeployedCode.selector, DEFAULT_TOKEN_TYPE); } } } } } else if (receiverConstraints == RECEIVER_CONSTRAINTS_EOA) { if (!isVerifiedEOA(to)) { if (!whitelist.nonEnumerableAccounts[to]) { // Cache _callerAuthorizedParam on stack to avoid stack too deep function(address,address,uint256) internal view returns(bool) _callerAuthorized = _callerAuthorizedParam; if(!_callerAuthorized(collection, caller, tokenId)) { if (!whitelist.nonEnumerableCodehashes[_getCodeHashAsm(to)]) { return (CreatorTokenTransferValidator__ReceiverProofOfEOASignatureUnverified.selector, DEFAULT_TOKEN_TYPE); } } } } } if (caller == from) { if (callerConstraints != CALLER_CONSTRAINTS_OPERATOR_WHITELIST_DISABLE_OTC) { return (SELECTOR_NO_ERROR, collectionSecurityPolicy.tokenType); } } if (callerConstraints == CALLER_CONSTRAINTS_OPERATOR_BLACKLIST_ENABLE_OTC) { // Cache _callerAuthorizedParam on stack to avoid stack too deep function(address,address,uint256) internal view returns(bool) _callerAuthorized = _callerAuthorizedParam; if(_callerAuthorized(collection, caller, tokenId)) { return (SELECTOR_NO_ERROR, collectionSecurityPolicy.tokenType); } List storage blacklist = blacklists[listId]; if (blacklist.nonEnumerableAccounts[caller]) { return (CreatorTokenTransferValidator__OperatorIsBlacklisted.selector, DEFAULT_TOKEN_TYPE); } if (blacklist.nonEnumerableCodehashes[_getCodeHashAsm(caller)]) { return (CreatorTokenTransferValidator__OperatorIsBlacklisted.selector, DEFAULT_TOKEN_TYPE); } } else if (callerConstraints == CALLER_CONSTRAINTS_OPERATOR_WHITELIST_ENABLE_OTC) { if (whitelist.nonEnumerableAccounts[caller]) { return (SELECTOR_NO_ERROR, collectionSecurityPolicy.tokenType); } // Cache _callerAuthorizedParam on stack to avoid stack too deep function(address,address,uint256) internal view returns(bool) _callerAuthorized = _callerAuthorizedParam; if( _callerAuthorized(collection, caller, tokenId)) { return (SELECTOR_NO_ERROR, collectionSecurityPolicy.tokenType); } if (whitelist.nonEnumerableCodehashes[_getCodeHashAsm(caller)]) { return (SELECTOR_NO_ERROR, collectionSecurityPolicy.tokenType); } return (CreatorTokenTransferValidator__CallerMustBeWhitelisted.selector, DEFAULT_TOKEN_TYPE); } else if (callerConstraints == CALLER_CONSTRAINTS_OPERATOR_WHITELIST_DISABLE_OTC) { mapping(address => bool) storage accountWhitelist = whitelist.nonEnumerableAccounts; if (accountWhitelist[caller]) { return (SELECTOR_NO_ERROR, collectionSecurityPolicy.tokenType); } if (accountWhitelist[from]) { return (SELECTOR_NO_ERROR, collectionSecurityPolicy.tokenType); } // Cache _callerAuthorizedParam on stack to avoid stack too deep function(address,address,uint256) internal view returns(bool) _callerAuthorized = _callerAuthorizedParam; if(_callerAuthorized(collection, caller, tokenId)) { return (SELECTOR_NO_ERROR, collectionSecurityPolicy.tokenType); } mapping(bytes32 => bool) storage codehashWhitelist = whitelist.nonEnumerableCodehashes; // Cache caller on stack to avoid stack too deep address tmpAddress = caller; if (codehashWhitelist[_getCodeHashAsm(tmpAddress)]) { return (SELECTOR_NO_ERROR, collectionSecurityPolicy.tokenType); } // Cache from on stack to avoid stack too deep tmpAddress = from; if (codehashWhitelist[_getCodeHashAsm(tmpAddress)]) { return (SELECTOR_NO_ERROR, collectionSecurityPolicy.tokenType); } return (CreatorTokenTransferValidator__CallerMustBeWhitelisted.selector, DEFAULT_TOKEN_TYPE); } return (SELECTOR_NO_ERROR, collectionSecurityPolicy.tokenType); } /** * @dev Internal function used to efficiently revert with a custom error selector. * * @param errorSelector The error selector to revert with. */ function _revertCustomErrorSelectorAsm(bytes4 errorSelector) internal pure { assembly { mstore(0x00, errorSelector) revert(0x00, 0x04) } } /** * @dev Internal function used to check if authorization mode can be activated for a transfer. * * @dev Throws when the collection has not enabled authorization mode. * @dev Throws when the wildcard operator is being set for a collection that does not * allow wildcard operators. * @dev Throws when the authorizer is not in the list of approved authorizers for * the collection. * * @param collection The collection address to activate authorization mode for a transfer. * @param operator The operator specified by the authorizer to allow transfers. * @param authorizer The address of the authorizer making the call. */ function _checkCollectionAllowsAuthorizerAndOperator( address collection, address operator, address authorizer ) internal view { CollectionSecurityPolicyV3 storage collectionSecurityPolicy = collectionSecurityPolicies[collection]; if (collectionSecurityPolicy.disableAuthorizationMode) { revert CreatorTokenTransferValidator__AuthorizationDisabledForCollection(); } if (collectionSecurityPolicy.authorizersCannotSetWildcardOperators) { if (operator == WILDCARD_OPERATOR_ADDRESS) { revert CreatorTokenTransferValidator__WildcardOperatorsCannotBeAuthorizedForCollection(); } } if (!authorizers[collectionSecurityPolicy.listId].nonEnumerableAccounts[authorizer]) { revert CreatorTokenTransferValidator__CallerMustBeAnAuthorizer(); } } /** * @dev Modifier to apply the allowed authorizer and operator for collection checks. * * @dev Throws when the collection has not enabled authorization mode. * @dev Throws when the wildcard operator is being set for a collection that does not * allow wildcard operators. * @dev Throws when the authorizer is not in the list of approved authorizers for * the collection. * * @param collection The collection address to activate authorization mode for a transfer. * @param operator The operator specified by the authorizer to allow transfers. * @param authorizer The address of the authorizer making the call. */ modifier whenAuthorizerAndOperatorEnabledForCollection( address collection, address operator, address authorizer ) { _checkCollectionAllowsAuthorizerAndOperator(collection, operator, authorizer); _; } /** * @dev Internal function for setting the authorized operator in storage for a token and collection. * * @param operator The allowed operator for an authorized transfer. * @param collection The address of the collection that the operator is authorized for. * @param tokenId The id of the token that is authorized. * @param allowAnyTokenId Flag if the authorizer is enabling transfers for any token id */ function _setOperatorInTransientStorage( address operator, address collection, uint256 tokenId, bool allowAnyTokenId ) internal whenAuthorizerAndOperatorEnabledForCollection(collection, operator, msg.sender) { _setTstorish(_getTransientOperatorSlot(collection), (allowAnyTokenId ? 1 << 255 : 0) | uint256(uint160(operator))); _setTstorish(_getTransientOperatorSlot(collection, tokenId), uint256(uint160(operator))); } /** * @dev Internal function to check if a caller is an authorized operator for the token being transferred. * * @param caller The caller of the token transfer. * @param collection The collection address of the token being transferred. * @param tokenId The id of the token being transferred. * * @return isAuthorized True if the caller is authorized to transfer the token, false otherwise. */ function _callerAuthorizedCheckToken( address collection, address caller, uint256 tokenId ) internal view returns (bool isAuthorized) { uint256 slotValue; (isAuthorized, ) = _callerAuthorized(caller, _getTransientOperatorSlot(collection, tokenId)); if (isAuthorized) return true; (isAuthorized, slotValue) = _callerAuthorized(caller, _getTransientOperatorSlot(collection)); isAuthorized = isAuthorized && slotValue >> 255 == 1; } /** * @dev Internal function to check if a caller is an authorized operator for the collection being transferred. * * @param caller The caller of the token transfer. * @param collection The collection address of the token being transferred. * * @return isAuthorized True if the caller is authorized to transfer the collection, false otherwise. */ function _callerAuthorizedCheckCollection( address collection, address caller, uint256 /*tokenId*/ ) internal view returns (bool isAuthorized) { (isAuthorized, ) = _callerAuthorized(caller, _getTransientOperatorSlot(collection)); } /** * @dev Internal function to check if a caller is an authorized operator. * @dev This overload of `_callerAuthorized` checks a specific storage slot for the caller address. * * @param caller The caller of the token transfer. * @param slot The storage slot to check for the caller address. * * @return isAuthorized True if the caller is authorized to transfer the token, false otherwise. * @return slotValue The transient storage value in `slot`, used to check for allow any token id flag if necessary. */ function _callerAuthorized(address caller, uint256 slot) internal view returns (bool isAuthorized, uint256 slotValue) { slotValue = _getTstorish(slot); address authorizedOperator = address(uint160(slotValue)); isAuthorized = authorizedOperator == WILDCARD_OPERATOR_ADDRESS || authorizedOperator == caller; } /** * @dev Internal function used to compute the transient storage slot for the authorized * operator of a token in a collection. * * @param collection The collection address of the token being transferred. * @param tokenId The id of the token being transferred. * * @return operatorSlot The storage slot location for the authorized operator value. */ function _getTransientOperatorSlot( address collection, uint256 tokenId ) internal pure returns (uint256 operatorSlot) { assembly { mstore(0x00, collection) mstore(0x20, tokenId) operatorSlot := shr(4, keccak256(0x00, 0x40)) } } /** * @dev Internal function used to compute the transient storage slot for the authorized operator of a collection. * * @param collection The collection address of the token being transferred. * * @return operatorSlot The storage slot location for the authorized operator value. */ function _getTransientOperatorSlot(address collection) internal pure returns (uint256 operatorSlot) { assembly { mstore(0x00, collection) mstore(0x20, _transientOperatorSlotHolder.slot) operatorSlot := keccak256(0x00, 0x40) } } /** * @dev A gas efficient, and fallback-safe way to call the owner function on a token contract. * This will get the owner if it exists - and when the function is unimplemented, the * presence of a fallback function will not result in halted execution. * * @param tokenAddress The address of the token collection to get the owner of. * * @return owner The owner of the token collection contract. * @return isError True if there was an error in retrieving the owner, false if the call was successful. */ function _safeOwner( address tokenAddress ) internal view returns(address owner, bool isError) { assembly { function _callOwner(_tokenAddress) -> _owner, _isError { mstore(0x00, 0x8da5cb5b) if and(iszero(lt(returndatasize(), 0x20)), staticcall(gas(), _tokenAddress, 0x1C, 0x04, 0x00, 0x20)) { _owner := mload(0x00) leave } _isError := true } owner, isError := _callOwner(tokenAddress) } } /** * @dev A gas efficient, and fallback-safe way to call the hasRole function on a token contract. * This will check if the account `hasRole` if `hasRole` exists - and when the function is unimplemented, the * presence of a fallback function will not result in halted execution. * * @param tokenAddress The address of the token collection to call hasRole on. * @param role The role to check if the account has on the collection. * @param account The address of the account to check if they have a specified role. * * @return hasRole The owner of the token collection contract. * @return isError True if there was an error in retrieving the owner, false if the call was successful. */ function _safeHasRole( address tokenAddress, bytes32 role, address account ) internal view returns(bool hasRole, bool isError) { assembly { function _callHasRole(_tokenAddress, _role, _account) -> _hasRole, _isError { let ptr := mload(0x40) mstore(0x40, add(ptr, 0x60)) mstore(ptr, 0x91d14854) mstore(add(0x20, ptr), _role) mstore(add(0x40, ptr), _account) if and(iszero(lt(returndatasize(), 0x20)), staticcall(gas(), _tokenAddress, add(ptr, 0x1C), 0x44, 0x00, 0x20)) { _hasRole := mload(0x00) leave } _isError := true } hasRole, isError := _callHasRole(tokenAddress, role, account) } } }
pragma solidity ^0.8.4; import "./IERC721.sol"; import "./IERC721Errors.sol"; import "./IERC721Receiver.sol"; import "./IERC721Metadata.sol"; import "./StorageERC721.sol"; import "../../utils/introspection/ERC165.sol"; import "../../utils/misc/Strings.sol"; import "../../utils/token/TransferHooks.sol"; /** * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including * the Metadata extension, but not including the Enumerable extension, which is available separately as * {ERC721Enumerable}. */ abstract contract ERC721 is TransferHooks, ERC165, IERC721, IERC721Metadata, IERC721Errors { using Strings for uint256; /** * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection. */ constructor(string memory name_, string memory symbol_) { StorageERC721.data().name = name_; StorageERC721.data().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 returns (uint256) { if (owner == address(0)) { revert ERC721InvalidOwner(address(0)); } return StorageERC721.data().balances[owner]; } /** * @dev See {IERC721-ownerOf}. */ function ownerOf(uint256 tokenId) public view virtual returns (address owner_) { owner_ = StorageERC721.data().owners[tokenId]; if (owner_ == address(0)) { revert ERC721NonexistentToken(tokenId); } } /** * @dev See {IERC721Metadata-name}. */ function name() public view virtual returns (string memory) { return StorageERC721.data().name; } /** * @dev See {IERC721Metadata-symbol}. */ function symbol() public view virtual returns (string memory) { return StorageERC721.data().symbol; } /** * @dev See {IERC721Metadata-tokenURI}. */ function tokenURI(uint256 tokenId) public view virtual returns (string memory) { address owner_ = StorageERC721.data().owners[tokenId]; if (owner_ == address(0)) { revert ERC721NonexistentToken(tokenId); } string memory baseURI = _baseURI(); return bytes(baseURI).length > 0 ? string.concat(baseURI, tokenId.toString()) : ""; } /** * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each * token will be the concatenation of the `baseURI` and the `tokenId`. Empty * by default, can be overridden in child contracts. */ function _baseURI() internal view virtual returns (string memory) { return ""; } /** * @dev See {IERC721-approve}. */ function approve(address to, uint256 tokenId) public virtual { address owner_ = StorageERC721.data().owners[tokenId]; if (owner_ == address(0)) { revert ERC721NonexistentToken(tokenId); } if (owner_ != msg.sender) { if (!isApprovedForAll(owner_, msg.sender)) { revert ERC721InvalidApprover(msg.sender); } } emit Approval(owner_, to, tokenId); StorageERC721.data().tokenApprovals[tokenId] = to; } /** * @dev See {IERC721-getApproved}. */ function getApproved(uint256 tokenId) public view virtual returns (address) { if (StorageERC721.data().owners[tokenId] == address(0)) { revert ERC721NonexistentToken(tokenId); } return StorageERC721.data().tokenApprovals[tokenId]; } /** * @dev See {IERC721-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public virtual { if (operator == address(0)) { revert ERC721InvalidOperator(operator); } StorageERC721.data().operatorApprovals[_getOperatorApprovalKey(msg.sender, operator)] = approved; emit ApprovalForAll(msg.sender, operator, approved); } /** * @dev See {IERC721-isApprovedForAll}. */ function isApprovedForAll(address owner, address operator) public view virtual returns (bool) { return StorageERC721.data().operatorApprovals[_getOperatorApprovalKey(owner, operator)]; } /** * @dev See {IERC721-transferFrom}. */ function transferFrom(address from, address to, uint256 tokenId) public virtual { if (to == address(0)) { revert ERC721InvalidReceiver(address(0)); } address previousOwner = StorageERC721.data().owners[tokenId]; if (previousOwner == address(0)) { revert ERC721NonexistentToken(tokenId); } if (previousOwner != from) { revert ERC721IncorrectOwner(from, tokenId, previousOwner); } _validateTransfer(msg.sender, from, to, tokenId, 0); if (from == msg.sender || isApprovedForAll(from, msg.sender) || StorageERC721.data().tokenApprovals[tokenId] == msg.sender) { // Clear approval. No need to re-authorize or emit the Approval event StorageERC721.data().tokenApprovals[tokenId] = address(0); unchecked { --StorageERC721.data().balances[from]; ++StorageERC721.data().balances[to]; } StorageERC721.data().owners[tokenId] = to; emit Transfer(from, to, tokenId); } else { revert ERC721InsufficientApproval(msg.sender, tokenId); } } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom(address from, address to, uint256 tokenId) public { safeTransferFrom(from, to, tokenId, ""); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory data) public virtual { transferFrom(from, to, tokenId); _checkOnERC721Received(from, to, tokenId, data); } /** * @dev Mints `tokenId`, transfers it to `to` and checks for `to` acceptance. * * Requirements: * * - `tokenId` must not exist. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeMint(address to, uint256 tokenId) internal { _safeMint(to, tokenId, ""); } /** * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is * forwarded in {IERC721Receiver-onERC721Received} to contract recipients. */ function _safeMint(address to, uint256 tokenId, bytes memory data) internal virtual { _mint(to, tokenId); _checkOnERC721Received(address(0), to, tokenId, data); } /** * @dev Mints `tokenId` and transfers it to `to`. * * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible * * Requirements: * * - `tokenId` must not exist. * - `to` cannot be the zero address. * * Emits a {Transfer} event. */ function _mint(address to, uint256 tokenId) internal { if (to == address(0)) { revert ERC721InvalidReceiver(address(0)); } if (StorageERC721.data().owners[tokenId] != address(0)) { revert ERC721InvalidSender(address(0)); } _validateMint(msg.sender, to, tokenId, msg.value); unchecked { ++StorageERC721.data().balances[to]; } StorageERC721.data().owners[tokenId] = to; emit Transfer(address(0), to, tokenId); } /** * @dev Destroys `tokenId`. * The approval is cleared when the token is burned. * This is an internal function that does not check if the sender is authorized to operate on the token. * * Requirements: * * - `tokenId` must exist. * * Emits a {Transfer} event. */ function _burn(uint256 tokenId) internal { address from = StorageERC721.data().owners[tokenId]; if (from == address(0)) { revert ERC721NonexistentToken(tokenId); } _validateBurn(msg.sender, from, tokenId, msg.value); // Clear approval. No need to re-authorize or emit the Approval event StorageERC721.data().tokenApprovals[tokenId] = address(0); unchecked { --StorageERC721.data().balances[from]; } StorageERC721.data().owners[tokenId] = address(0); emit Transfer(from, address(0), tokenId); } /** * @dev Private function to invoke {IERC721Receiver-onERC721Received} on a target address. This will revert if the * recipient doesn't accept the token transfer. The call is not executed if the target address is not a contract. * * @param from address representing the previous owner of the given token ID * @param to target address that will receive the tokens * @param tokenId uint256 ID of the token to be transferred * @param data bytes optional data to send along with the call */ function _checkOnERC721Received(address from, address to, uint256 tokenId, bytes memory data) private { if (to.code.length > 0) { try IERC721Receiver(to).onERC721Received(msg.sender, from, tokenId, data) returns (bytes4 retval) { if (retval != IERC721Receiver.onERC721Received.selector) { revert ERC721InvalidReceiver(to); } } catch (bytes memory reason) { if (reason.length == 0) { revert ERC721InvalidReceiver(to); } else { /// @solidity memory-safe-assembly assembly { revert(add(32, reason), mload(reason)) } } } } } function _getOperatorApprovalKey(address owner_, address operator_) internal pure returns (bytes32 key) { assembly { mstore(0x00, owner_) mstore(0x20, operator_) key := keccak256(0x00, 0x40) } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; import "../access/OwnablePermissions.sol"; /** * @title AutomaticValidatorTransferApproval * @author Limit Break, Inc. * @notice Base contract mix-in that provides boilerplate code giving the contract owner the * option to automatically approve a 721-C transfer validator implementation for transfers. */ abstract contract AutomaticValidatorTransferApproval is OwnablePermissions { struct StorageAutomaticValidatorTransferApproval { bool autoApproveTransfersFromValidator; } bytes32 private constant AUTOMATIC_VALIDATOR_TRANSFER_APPROVAL_STORAGE_SLOT = keccak256("storage.AutomaticValidatorTransferApproval"); function storageAutomaticValidatorTransferApproval() internal pure returns (StorageAutomaticValidatorTransferApproval storage ptr) { bytes32 slot = AUTOMATIC_VALIDATOR_TRANSFER_APPROVAL_STORAGE_SLOT; assembly { ptr.slot := slot } } /// @dev Emitted when the automatic approval flag is modified by the creator. event AutomaticApprovalOfTransferValidatorSet(bool autoApproved); /** * @notice Sets if the transfer validator is automatically approved as an operator for all token owners. * * @dev Throws when the caller is not the contract owner. * * @param autoApprove If true, the collection's transfer validator will be automatically approved to * transfer holder's tokens. */ function setAutomaticApprovalOfTransfersFromValidator(bool autoApprove) external { _requireCallerIsContractOwner(); storageAutomaticValidatorTransferApproval().autoApproveTransfersFromValidator = autoApprove; emit AutomaticApprovalOfTransferValidatorSet(autoApprove); } function autoApproveTransfersFromValidator() public view returns (bool) { return storageAutomaticValidatorTransferApproval().autoApproveTransfersFromValidator; } }
pragma solidity ^0.8.4; import "./ICreatorToken.sol"; import "./ICreatorTokenLegacy.sol"; import "./ITransferValidator.sol"; import "./ITransferValidatorSetTokenType.sol"; import "./TransferValidation.sol"; import "../access/OwnablePermissions.sol"; /** * @title CreatorTokenBase * @author Limit Break, Inc. * @notice CreatorTokenBaseV3 is an abstract contract that provides basic functionality for managing token * transfer policies through an implementation of ICreatorTokenTransferValidator/ICreatorTokenTransferValidatorV2/ICreatorTokenTransferValidatorV3. * This contract is intended to be used as a base for creator-specific token contracts, enabling customizable transfer * restrictions and security policies. * * <h4>Features:</h4> * <ul>Ownable: This contract can have an owner who can set and update the transfer validator.</ul> * <ul>TransferValidation: Implements the basic token transfer validation interface.</ul> * * <h4>Benefits:</h4> * <ul>Provides a flexible and modular way to implement custom token transfer restrictions and security policies.</ul> * <ul>Allows creators to enforce policies such as account and codehash blacklists, whitelists, and graylists.</ul> * <ul>Can be easily integrated into other token contracts as a base contract.</ul> * * <h4>Intended Usage:</h4> * <ul>Use as a base contract for creator token implementations that require advanced transfer restrictions and * security policies.</ul> * <ul>Set and update the ICreatorTokenTransferValidator implementation contract to enforce desired policies for the * creator token.</ul> * * <h4>Compatibility:</h4> * <ul>Backward and Forward Compatible - V1/V2/V3 Creator Token Base will work with V1/V2/V3 Transfer Validators.</ul> */ abstract contract CreatorTokenBase is OwnablePermissions, TransferValidation, ICreatorToken { struct StorageCreatorToken { bool isValidatorInitialized; address transferValidator; } bytes32 private constant CREATOR_TOKEN_STORAGE_SLOT = keccak256("storage.CreatorToken"); function storageCreatorToken() internal pure returns (StorageCreatorToken storage ptr) { bytes32 slot = CREATOR_TOKEN_STORAGE_SLOT; assembly { ptr.slot := slot } } /// @dev Thrown when setting a transfer validator address that has no deployed code. error CreatorTokenBase__InvalidTransferValidatorContract(); /// @dev The default transfer validator that will be used if no transfer validator has been set by the creator. address private immutable DEFAULT_TRANSFER_VALIDATOR; constructor(address defaultTransferValidator_) { DEFAULT_TRANSFER_VALIDATOR = defaultTransferValidator_; _emitDefaultTransferValidator(); _registerTokenType(DEFAULT_TRANSFER_VALIDATOR); } /** * @notice Sets the transfer validator for the token contract. * * @dev Throws when provided validator contract is not the zero address and does not have code. * @dev Throws when the caller is not the contract owner. * * @dev <h4>Postconditions:</h4> * 1. The transferValidator address is updated. * 2. The `TransferValidatorUpdated` event is emitted. * * @param transferValidator_ The address of the transfer validator contract. */ function setTransferValidator(address transferValidator_) public { _requireCallerIsContractOwner(); bool isValidTransferValidator = transferValidator_.code.length > 0; if(transferValidator_ != address(0) && !isValidTransferValidator) { revert CreatorTokenBase__InvalidTransferValidatorContract(); } emit TransferValidatorUpdated(address(getTransferValidator()), transferValidator_); storageCreatorToken().isValidatorInitialized = true; storageCreatorToken().transferValidator = transferValidator_; _registerTokenType(transferValidator_); } /** * @notice Returns the default transfer validator contract address for this token contract. * This validator will be used if no transfer validator has been set by the creator. */ function getDefaultTransferValidator() public virtual view returns (address) { return DEFAULT_TRANSFER_VALIDATOR; } /** * @notice Returns the transfer validator contract address for this token contract. */ function getTransferValidator() public view override returns (address validator) { validator = storageCreatorToken().transferValidator; if (validator == address(0)) { if (!storageCreatorToken().isValidatorInitialized) { validator = getDefaultTransferValidator(); } } } /** * @dev Pre-validates a token transfer, reverting if the transfer is not allowed by this token's security policy. * Inheriting contracts are responsible for overriding the _beforeTokenTransfer function, or its equivalent * and calling _validateBeforeTransfer so that checks can be properly applied during token transfers. * * @dev Be aware that if the msg.sender is the transfer validator, the transfer is automatically permitted, as the * transfer validator is expected to pre-validate the transfer. * * @dev Throws when the transfer doesn't comply with the collection's transfer policy, if the transferValidator is * set to a non-zero address. * * @param caller The address of the caller. * @param from The address of the sender. * @param to The address of the receiver. * @param tokenId The token id being transferred. */ function _preValidateTransfer( address caller, address from, address to, uint256 tokenId, uint256 /*value*/) internal virtual override { address validator = getTransferValidator(); if (validator != address(0)) { if (msg.sender == validator) { return; } ITransferValidator(validator).validateTransfer(caller, from, to, tokenId); } } /** * @dev Pre-validates a token transfer, reverting if the transfer is not allowed by this token's security policy. * Inheriting contracts are responsible for overriding the _beforeTokenTransfer function, or its equivalent * and calling _validateBeforeTransfer so that checks can be properly applied during token transfers. * * @dev Be aware that if the msg.sender is the transfer validator, the transfer is automatically permitted, as the * transfer validator is expected to pre-validate the transfer. * * @dev Used for ERC20 and ERC1155 token transfers which have an amount value to validate in the transfer validator. * @dev The `tokenId` for ERC20 tokens should be set to `0`. * * @dev Throws when the transfer doesn't comply with the collection's transfer policy, if the transferValidator is * set to a non-zero address. * * @param caller The address of the caller. * @param from The address of the sender. * @param to The address of the receiver. * @param tokenId The token id being transferred. * @param amount The amount of token being transferred. */ function _preValidateTransfer( address caller, address from, address to, uint256 tokenId, uint256 amount, uint256 /*value*/) internal virtual override { address validator = getTransferValidator(); if (validator != address(0)) { if (msg.sender == validator) { return; } ITransferValidator(validator).validateTransfer(caller, from, to, tokenId, amount); } } function _tokenType() internal virtual pure returns(uint16); function _registerTokenType(address validator) internal { if (validator != address(0)) { uint256 validatorCodeSize; assembly { validatorCodeSize := extcodesize(validator) } if(validatorCodeSize > 0) { try ITransferValidatorSetTokenType(validator).setTokenTypeOfCollection(address(this), _tokenType()) { } catch { } } } } /** * @dev Used during contract deployment for constructable and cloneable creator tokens * @dev to emit the `TransferValidatorUpdated` event signaling the validator for the contract * @dev is the default transfer validator. */ function _emitDefaultTransferValidator() internal { emit TransferValidatorUpdated(address(0), getDefaultTransferValidator()); } }
pragma solidity ^0.8.4; /// @dev Constant value representing the ERC721 token type for signatures and transfer hooks uint256 constant TOKEN_TYPE_ERC721 = 721; /// @dev Constant value representing the ERC1155 token type for signatures and transfer hooks uint256 constant TOKEN_TYPE_ERC1155 = 1155; /// @dev Constant value representing the ERC20 token type for signatures and transfer hooks uint256 constant TOKEN_TYPE_ERC20 = 20;
// SPDX-License-Identifier: MIT pragma solidity 0.8.24; /** * @dev Constant definitions for receiver constraints used by the transfer validator. */ /// @dev No constraints on the receiver of a token. uint256 constant RECEIVER_CONSTRAINTS_NONE = 0; /// @dev Token receiver cannot have deployed code. uint256 constant RECEIVER_CONSTRAINTS_NO_CODE = 1; /// @dev Token receiver must be a verified EOA with the EOA Registry. uint256 constant RECEIVER_CONSTRAINTS_EOA = 2; /// @dev Token is a soulbound token and cannot be transferred. uint256 constant RECEIVER_CONSTRAINTS_SBT = 3; /** * @dev Constant definitions for caller constraints used by the transfer validator. */ /// @dev No constraints on the caller of a token transfer. uint256 constant CALLER_CONSTRAINTS_NONE = 0; /// @dev Caller of a token transfer must not be on the blacklist unless it is an OTC transfer. uint256 constant CALLER_CONSTRAINTS_OPERATOR_BLACKLIST_ENABLE_OTC = 1; /// @dev Caller of a token transfer must be on the whitelist unless it is an OTC transfer. uint256 constant CALLER_CONSTRAINTS_OPERATOR_WHITELIST_ENABLE_OTC = 2; /// @dev Caller of a token transfer must be on the whitelist. uint256 constant CALLER_CONSTRAINTS_OPERATOR_WHITELIST_DISABLE_OTC = 3; /// @dev Token is a soulbound token and cannot be transferred. uint256 constant CALLER_CONSTRAINTS_SBT = 4; /** * @dev Constant definitions for transfer security levels used by the transfer validator * to define what receiver and caller constraints are applied to a transfer. */ /// @dev Recommend Security Level - /// Caller Constraints: Operator Whitelist /// Receiver Constraints: None /// OTC: Allowed uint8 constant TRANSFER_SECURITY_LEVEL_RECOMMENDED = 0; /// @dev Security Level One - /// Caller Constraints: None /// Receiver Constraints: None /// OTC: Allowed uint8 constant TRANSFER_SECURITY_LEVEL_ONE = 1; /// @dev Security Level Two - /// Caller Constraints: Operator Blacklist /// Receiver Constraints: None /// OTC: Allowed uint8 constant TRANSFER_SECURITY_LEVEL_TWO = 2; /// @dev Security Level Three - /// Caller Constraints: Operator Whitelist /// Receiver Constraints: None /// OTC: Allowed uint8 constant TRANSFER_SECURITY_LEVEL_THREE = 3; /// @dev Security Level Four - /// Caller Constraints: Operator Whitelist /// Receiver Constraints: None /// OTC: Not Allowed uint8 constant TRANSFER_SECURITY_LEVEL_FOUR = 4; /// @dev Security Level Five - /// Caller Constraints: Operator Whitelist /// Receiver Constraints: No Code /// OTC: Allowed uint8 constant TRANSFER_SECURITY_LEVEL_FIVE = 5; /// @dev Security Level Six - /// Caller Constraints: Operator Whitelist /// Receiver Constraints: Verified EOA /// OTC: Allowed uint8 constant TRANSFER_SECURITY_LEVEL_SIX = 6; /// @dev Security Level Seven - /// Caller Constraints: Operator Whitelist /// Receiver Constraints: No Code /// OTC: Not Allowed uint8 constant TRANSFER_SECURITY_LEVEL_SEVEN = 7; /// @dev Security Level Eight - /// Caller Constraints: Operator Whitelist /// Receiver Constraints: Verified EOA /// OTC: Not Allowed uint8 constant TRANSFER_SECURITY_LEVEL_EIGHT = 8; /// @dev Security Level Nine - /// Soulbound Token, No Transfers Allowed uint8 constant TRANSFER_SECURITY_LEVEL_NINE = 9; /// @dev List type is a blacklist. uint8 constant LIST_TYPE_BLACKLIST = 0; /// @dev List type is a whitelist. uint8 constant LIST_TYPE_WHITELIST = 1; /// @dev List type is authorizers. uint8 constant LIST_TYPE_AUTHORIZERS = 2; /// @dev Constant value for the no error selector. bytes4 constant SELECTOR_NO_ERROR = bytes4(0x00000000); /// @dev Constant value for the default validator list ID. uint120 constant DEFAULT_LIST_ID = 0;
// SPDX-License-Identifier: MIT pragma solidity 0.8.24; struct CollectionSecurityPolicyV3 { bool disableAuthorizationMode; bool authorizersCannotSetWildcardOperators; uint8 transferSecurityLevel; uint120 listId; bool enableAccountFreezingMode; uint16 tokenType; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.24; /** * @title ZkTstorish */ abstract contract ZkTstorish { function _setTstorish(uint256 storageSlot, uint256 value) internal { assembly { tstore(storageSlot, value) } } function _getTstorish( uint256 storageSlot ) internal view returns (uint256 value) { assembly { value := tload(storageSlot) } } function _clearTstorish(uint256 storageSlot) internal { assembly { tstore(storageSlot, 0) } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.24; import "./Errors.sol"; import {IERC20} from "@openzeppelin/contracts/interfaces/IERC20.sol"; import {IERC721} from "@openzeppelin/contracts/interfaces/IERC721.sol"; import {IERC1155} from "@openzeppelin/contracts/interfaces/IERC1155.sol"; import {IERC1271} from "@openzeppelin/contracts/interfaces/IERC1271.sol"; import {Ownable} from "./openzeppelin-optimized/Ownable.sol"; import {EIP712} from "./openzeppelin-optimized/EIP712.sol"; import { ZERO_BYTES32, ZERO, ONE, ORDER_STATE_OPEN, ORDER_STATE_FILLED, ORDER_STATE_CANCELLED, SINGLE_USE_PERMIT_TRANSFER_ADVANCED_TYPEHASH_STUB, PERMIT_ORDER_ADVANCED_TYPEHASH_STUB, UPPER_BIT_MASK, TOKEN_TYPE_ERC1155, TOKEN_TYPE_ERC20, TOKEN_TYPE_ERC721, PAUSABLE_APPROVAL_TRANSFER_FROM_ERC721, PAUSABLE_APPROVAL_TRANSFER_FROM_ERC1155, PAUSABLE_APPROVAL_TRANSFER_FROM_ERC20, PAUSABLE_PERMITTED_TRANSFER_FROM_ERC721, PAUSABLE_PERMITTED_TRANSFER_FROM_ERC1155, PAUSABLE_PERMITTED_TRANSFER_FROM_ERC20, PAUSABLE_ORDER_TRANSFER_FROM_ERC1155, PAUSABLE_ORDER_TRANSFER_FROM_ERC20 } from "./Constants.sol"; import {PackedApproval, OrderFillAmounts} from "./DataTypes.sol"; import {PermitHash} from './libraries/PermitHash.sol'; import {IPermitC} from './interfaces/IPermitC.sol'; import {CollateralizedPausableFlags} from './CollateralizedPausableFlags.sol'; /* @@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@( @@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@ #@@@@@@@@@@@@@@ @@@@@@@@@@@@ @@@@@@@@@@@@@@* @@@@@@@@@@@@ @@@@@@@@@@@@@@@ @ @@@@@@@@@@@@ @@@@@@@@@@@@@@@ @ @@@@@@@@@@@ @@@@@@@@@@@@@@@ @@ @@@@@@@@@@@@ @@@@@@@@@@@@@@@ #@@ @@@@@@@@@@@@/ @@@@@@@@@@@@@@. @@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@ @@@@@&%%%%%%%%&&@@@@@@@@@@@@@@ @@@@@@@@@@@@@@ @@@@@ @@@@@@@@@@@ @@@@@@@@@@@@@@@ @@@@@ @@@@@@@@@@@ @@@@@@@@@@@@@@@ @@@@@@ @@@@@@@@@@@ @@@@@@@@@@@@@@@ @@@@@@@ @@@@@@@@@@@ @@@@@@@@@@@@@@@ @@@@@@@ @@@@@@@@@@@& @@@@@@@@@@@@@@ *@@@@@@@ (@@@@@@@@@@@@ @@@@@@@@@@@@@@@ @@@@@@@@ @@@@@@@@@@@@@@ @@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ .@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@% @@@@@@@@@@@@@@@@@@@@@@@@( @@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@& @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ * @title PermitC * @custom:version 1.0.0 * @author Limit Break, Inc. * @description Advanced approval management for ERC20, ERC721 and ERC1155 tokens * allowing for single use permit transfers, time-bound approvals * and order ID based transfers. */ contract PermitC is Ownable, CollateralizedPausableFlags, EIP712, IPermitC { /** * @notice Map of approval details for the provided bytes32 hash to allow for multiple accessors * * @dev keccak256(abi.encode(owner, tokenType, token, id, orderId, masterNonce)) => * @dev operator => (state, amount, expiration) * @dev Utilized for stored approvals by an owner's direct call to `approve` and * @dev approvals by signature in `updateApprovalBySignature`. Both methods use a * @dev bytes32(0) value for the `orderId`. */ mapping(bytes32 => mapping(address => PackedApproval)) private _transferApprovals; /** * @notice Map of approval details for the provided bytes32 hash to allow for multiple accessors * * @dev keccak256(abi.encode(owner, tokenType, token, id, orderId, masterNonce)) => * @dev operator => (state, amount, expiration) * @dev Utilized for order approvals by `fillPermittedOrderERC20` and `fillPermittedOrderERC1155` * @dev with the `orderId` provided by the sender. */ mapping(bytes32 => mapping(address => PackedApproval)) private _orderApprovals; /** * @notice Map of registered additional data hashes for transfer permits. * * @dev This is used to prevent someone from providing an invalid EIP712 envelope label * @dev and tricking a user into signing a different message than they expect. */ mapping(bytes32 => bool) private _registeredTransferHashes; /** * @notice Map of registered additional data hashes for order permits. * * @dev This is used to prevent someone from providing an invalid EIP712 envelope label * @dev and tricking a user into signing a different message than they expect. */ mapping(bytes32 => bool) private _registeredOrderHashes; /// @dev Map of an address to a bitmap (slot => status) mapping(address => mapping(uint256 => uint256)) private _unorderedNonces; /** * @notice Master nonce used to invalidate all outstanding approvals for an owner * * @dev owner => masterNonce * @dev This is incremented when the owner calls lockdown() */ mapping(address => uint256) private _masterNonces; constructor( string memory name, string memory version, address _defaultContractOwner, uint256 _nativeValueToCheckPauseState ) CollateralizedPausableFlags(_nativeValueToCheckPauseState) EIP712(name, version) { _transferOwnership(_defaultContractOwner); } /** * ================================================= * ================= Modifiers ===================== * ================================================= */ modifier onlyRegisteredTransferAdvancedTypeHash(bytes32 advancedPermitHash) { _requireTransferAdvancedPermitHashIsRegistered(advancedPermitHash); _; } modifier onlyRegisteredOrderAdvancedTypeHash(bytes32 advancedPermitHash) { _requireOrderAdvancedPermitHashIsRegistered(advancedPermitHash); _; } /** * ================================================= * ============== Approval Transfers =============== * ================================================= */ /** * @notice Approve an operator to spend a specific token / ID combination * @notice This function is compatible with ERC20, ERC721 and ERC1155 * @notice To give unlimited approval for ERC20 and ERC1155, set amount to type(uint200).max * @notice When approving an ERC721, you MUST set amount to `1` * @notice When approving an ERC20, you MUST set id to `0` * * @dev <h4>Postconditions:</h4> * @dev 1. Updates the approval for an operator to use an amount of a specific token / ID combination * @dev 2. If the expiration is 0, the approval is valid only in the context of the current block * @dev 3. If the expiration is not 0, the approval is valid until the expiration timestamp * @dev 4. If the provided amount is type(uint200).max, the approval is unlimited * * @param tokenType The type of token being approved - must be 20, 721 or 1155. * @param token The address of the token contract * @param id The token ID * @param operator The address of the operator * @param amount The amount of tokens to approve * @param expiration The expiration timestamp of the approval */ function approve( uint256 tokenType, address token, uint256 id, address operator, uint200 amount, uint48 expiration ) external { _requireValidTokenType(tokenType); _storeApproval(tokenType, token, id, amount, expiration, msg.sender, operator); } /** * @notice Use a signed permit to increase the allowance for a provided operator * @notice This function is compatible with ERC20, ERC721 and ERC1155 * @notice To give unlimited approval for ERC20 and ERC1155, set amount to type(uint200).max * @notice When approving an ERC721, you MUST set amount to `1` * @notice When approving an ERC20, you MUST set id to `0` * @notice An `approvalExpiration` of zero is considered an atomic permit which will use the * @notice current block time as the expiration time when storing the permit data. * * @dev - Throws if the permit has expired * @dev - Throws if the permit's nonce has already been used * @dev - Throws if the permit signature is does not recover to the provided owner * * @dev <h4>Postconditions:</h4> * @dev 1. Updates the approval for an operator to use an amount of a specific token / ID combination * @dev 3. Sets the expiration of the approval to the expiration timestamp of the permit * @dev 4. If the provided amount is type(uint200).max, the approval is unlimited * * @param tokenType The type of token being approved - must be 20, 721 or 1155. * @param token Address of the token to approve * @param id The token ID * @param nonce The nonce of the permit * @param amount The amount of tokens to approve * @param operator The address of the operator * @param approvalExpiration The expiration timestamp of the approval * @param sigDeadline The deadline timestamp for the permit signature * @param owner The owner of the tokens * @param signedPermit The permit signature, signed by the owner */ function updateApprovalBySignature( uint256 tokenType, address token, uint256 id, uint256 nonce, uint200 amount, address operator, uint48 approvalExpiration, uint48 sigDeadline, address owner, bytes calldata signedPermit ) external { if (block.timestamp > sigDeadline) { revert PermitC__ApprovalTransferPermitExpiredOrUnset(); } _requireValidTokenType(tokenType); _checkAndInvalidateNonce(owner, nonce); _verifyPermitSignature( _hashTypedDataV4( PermitHash.hashOnChainApproval( tokenType, token, id, amount, nonce, operator, approvalExpiration, sigDeadline, _masterNonces[owner] ) ), signedPermit, owner ); // Expiration of zero is considered an atomic permit which is only valid in the // current block. approvalExpiration = approvalExpiration == 0 ? uint48(block.timestamp) : approvalExpiration; _storeApproval(tokenType, token, id, amount, approvalExpiration, owner, operator); } /** * @notice Returns the amount of allowance an operator has and it's expiration for a specific token and id * @notice If the expiration on the allowance has expired, returns 0 * @notice To retrieve allowance for ERC20, set id to `0` * * @param owner The owner of the token * @param operator The operator of the token * @param tokenType The type of token the allowance is for * @param token The address of the token contract * @param id The token ID * * @return allowedAmount The amount of allowance the operator has * @return expiration The expiration timestamp of the allowance */ function allowance( address owner, address operator, uint256 tokenType, address token, uint256 id ) external view returns (uint256 allowedAmount, uint256 expiration) { return _allowance(_transferApprovals, owner, operator, tokenType, token, id, ZERO_BYTES32); } /** * ================================================= * ================ Signed Transfers =============== * ================================================= */ /** * @notice Registers the combination of a provided string with the `SINGLE_USE_PERMIT_TRANSFER_ADVANCED_TYPEHASH_STUB` * @notice and `PERMIT_ORDER_ADVANCED_TYPEHASH_STUB` to create valid additional data hashes * * @dev This function prevents malicious actors from changing the label of the EIP712 hash * @dev to a value that would fool an external user into signing a different message. * * @dev <h4>Postconditions:</h4> * @dev 1. The provided string is combined with the `SINGLE_USE_PERMIT_TRANSFER_ADVANCED_TYPEHASH_STUB` string * @dev 2. The combined string is hashed using keccak256 * @dev 3. The resulting hash is added to the `_registeredTransferHashes` mapping * @dev 4. The provided string is combined with the `PERMIT_ORDER_ADVANCED_TYPEHASH_STUB` string * @dev 5. The combined string is hashed using keccak256 * @dev 6. The resulting hash is added to the `_registeredOrderHashes` mapping * * @param additionalDataTypeString The string to register as a valid additional data hash */ function registerAdditionalDataHash(string calldata additionalDataTypeString) external { _registeredTransferHashes[ keccak256( bytes( string.concat( SINGLE_USE_PERMIT_TRANSFER_ADVANCED_TYPEHASH_STUB, additionalDataTypeString ) ) ) ] = true; _registeredOrderHashes[ keccak256( bytes( string.concat( PERMIT_ORDER_ADVANCED_TYPEHASH_STUB, additionalDataTypeString ) ) ) ] = true; } /** * @notice Transfer an ERC721 token from the owner to the recipient using a permit signature. * * @dev Be advised that the permitted amount for ERC721 is always inferred to be 1, so signed permitted amount * @dev MUST always be set to 1. * * @dev - Throws if the permit is expired * @dev - Throws if the nonce has already been used * @dev - Throws if the permit is not signed by the owner * @dev - Throws if the requested amount exceeds the permitted amount * @dev - Throws if the provided token address does not implement ERC721 transferFrom function * @dev - Returns `false` if the transfer fails * * @dev <h4>Postconditions:</h4> * @dev 1. Transfers the token from the owner to the recipient * @dev 2. The nonce of the permit is marked as used * @dev 3. Performs any additional checks in the before and after hooks * * @param token The address of the token * @param id The ID of the token * @param nonce The nonce of the permit * @param expiration The expiration timestamp of the permit * @param owner The owner of the token * @param to The address to transfer the tokens to * @param signedPermit The permit signature, signed by the owner * * @return isError True if the transfer failed, false otherwise */ function permitTransferFromERC721( address token, uint256 id, uint256 nonce, uint256 expiration, address owner, address to, bytes calldata signedPermit ) external returns (bool isError) { _requireNotPaused(PAUSABLE_PERMITTED_TRANSFER_FROM_ERC721); _checkPermitApproval(TOKEN_TYPE_ERC721, token, id, ONE, nonce, expiration, owner, ONE, signedPermit); isError = _transferFromERC721(owner, to, token, id); if (isError) { _restoreNonce(owner, nonce); } } /** * @notice Transfers an ERC721 token from the owner to the recipient using a permit signature * @notice This function includes additional data to verify on the signature, allowing * @notice protocols to extend the validation in one function call. NOTE: before calling this * @notice function you MUST register the stub end of the additional data typestring using * @notice the `registerAdditionalDataHash` function. * * @dev Be advised that the permitted amount for ERC721 is always inferred to be 1, so signed permitted amount * @dev MUST always be set to 1. * * @dev - Throws for any reason permitTransferFromERC721 would. * @dev - Throws if the additional data does not match the signature * @dev - Throws if the provided hash has not been registered as a valid additional data hash * @dev - Throws if the provided hash does not match the provided additional data * * @dev <h4>Postconditions:</h4> * @dev 1. Transfers the token from the owner to the recipient * @dev 2. Performs any additional checks in the before and after hooks * @dev 3. The nonce of the permit is marked as used * * @param token The address of the token * @param id The ID of the token * @param nonce The nonce of the permit * @param expiration The expiration timestamp of the permit * @param owner The owner of the token * @param to The address to transfer the tokens to * @param additionalData The additional data to verify on the signature * @param advancedPermitHash The hash of the additional data * @param signedPermit The permit signature, signed by the owner * * @return isError True if the transfer failed, false otherwise */ function permitTransferFromWithAdditionalDataERC721( address token, uint256 id, uint256 nonce, uint256 expiration, address owner, address to, bytes32 additionalData, bytes32 advancedPermitHash, bytes calldata signedPermit ) external onlyRegisteredTransferAdvancedTypeHash(advancedPermitHash) returns (bool isError) { _requireNotPaused(PAUSABLE_PERMITTED_TRANSFER_FROM_ERC721); _checkPermitApprovalWithAdditionalDataERC721( token, id, ONE, nonce, expiration, owner, ONE, signedPermit, additionalData, advancedPermitHash ); isError = _transferFromERC721(owner, to, token, id); if (isError) { _restoreNonce(owner, nonce); } } /** * @notice Transfer an ERC1155 token from the owner to the recipient using a permit signature * * @dev - Throws if the permit is expired * @dev - Throws if the nonce has already been used * @dev - Throws if the permit is not signed by the owner * @dev - Throws if the requested amount exceeds the permitted amount * @dev - Throws if the provided token address does not implement ERC1155 safeTransferFrom function * @dev - Returns `false` if the transfer fails * * @dev <h4>Postconditions:</h4> * @dev 1. Transfers the token (in the requested amount) from the owner to the recipient * @dev 2. The nonce of the permit is marked as used * @dev 3. Performs any additional checks in the before and after hooks * * @param token The address of the token * @param id The ID of the token * @param nonce The nonce of the permit * @param permitAmount The amount of tokens permitted by the owner * @param expiration The expiration timestamp of the permit * @param owner The owner of the token * @param to The address to transfer the tokens to * @param transferAmount The amount of tokens to transfer * @param signedPermit The permit signature, signed by the owner * * @return isError True if the transfer failed, false otherwise */ function permitTransferFromERC1155( address token, uint256 id, uint256 nonce, uint256 permitAmount, uint256 expiration, address owner, address to, uint256 transferAmount, bytes calldata signedPermit ) external returns (bool isError) { _requireNotPaused(PAUSABLE_PERMITTED_TRANSFER_FROM_ERC1155); _checkPermitApproval(TOKEN_TYPE_ERC1155, token, id, permitAmount, nonce, expiration, owner, transferAmount, signedPermit); isError = _transferFromERC1155(token, owner, to, id, transferAmount); if (isError) { _restoreNonce(owner, nonce); } } /** * @notice Transfers a token from the owner to the recipient using a permit signature * @notice This function includes additional data to verify on the signature, allowing * @notice protocols to extend the validation in one function call. NOTE: before calling this * @notice function you MUST register the stub end of the additional data typestring using * @notice the `registerAdditionalDataHash` function. * * @dev - Throws for any reason permitTransferFrom would. * @dev - Throws if the additional data does not match the signature * @dev - Throws if the provided hash has not been registered as a valid additional data hash * @dev - Throws if the provided hash does not match the provided additional data * @dev - Throws if the provided hash has not been registered as a valid additional data hash * @dev - Returns `false` if the transfer fails * * @dev <h4>Postconditions:</h4> * @dev 1. Transfers the token (in the requested amount) from the owner to the recipient * @dev 2. Performs any additional checks in the before and after hooks * @dev 3. The nonce of the permit is marked as used * * @param token The address of the token * @param id The ID of the token * @param nonce The nonce of the permit * @param permitAmount The amount of tokens permitted by the owner * @param expiration The expiration timestamp of the permit * @param owner The owner of the token * @param to The address to transfer the tokens to * @param transferAmount The amount of tokens to transfer * @param additionalData The additional data to verify on the signature * @param advancedPermitHash The hash of the additional data * @param signedPermit The permit signature, signed by the owner * * @return isError True if the transfer failed, false otherwise */ function permitTransferFromWithAdditionalDataERC1155( address token, uint256 id, uint256 nonce, uint256 permitAmount, uint256 expiration, address owner, address to, uint256 transferAmount, bytes32 additionalData, bytes32 advancedPermitHash, bytes calldata signedPermit ) external onlyRegisteredTransferAdvancedTypeHash(advancedPermitHash) returns (bool isError) { _requireNotPaused(PAUSABLE_PERMITTED_TRANSFER_FROM_ERC1155); _checkPermitApprovalWithAdditionalDataERC1155( token, id, permitAmount, nonce, expiration, owner, transferAmount, signedPermit, additionalData, advancedPermitHash ); // copy id to top of stack to avoid stack too deep uint256 tmpId = id; isError = _transferFromERC1155(token, owner, to, tmpId, transferAmount); if (isError) { _restoreNonce(owner, nonce); } } /** * @notice Transfer an ERC20 token from the owner to the recipient using a permit signature. * * @dev Be advised that the token ID for ERC20 is always inferred to be 0, so signed token ID * @dev MUST always be set to 0. * * @dev - Throws if the permit is expired * @dev - Throws if the nonce has already been used * @dev - Throws if the permit is not signed by the owner * @dev - Throws if the requested amount exceeds the permitted amount * @dev - Throws if the provided token address does not implement ERC20 transferFrom function * @dev - Returns `false` if the transfer fails * * @dev <h4>Postconditions:</h4> * @dev 1. Transfers the token in the requested amount from the owner to the recipient * @dev 2. The nonce of the permit is marked as used * @dev 3. Performs any additional checks in the before and after hooks * * @param token The address of the token * @param nonce The nonce of the permit * @param permitAmount The amount of tokens permitted by the owner * @param expiration The expiration timestamp of the permit * @param owner The owner of the token * @param to The address to transfer the tokens to * @param signedPermit The permit signature, signed by the owner * * @return isError True if the transfer failed, false otherwise */ function permitTransferFromERC20( address token, uint256 nonce, uint256 permitAmount, uint256 expiration, address owner, address to, uint256 transferAmount, bytes calldata signedPermit ) external returns (bool isError) { _requireNotPaused(PAUSABLE_PERMITTED_TRANSFER_FROM_ERC20); _checkPermitApproval(TOKEN_TYPE_ERC20, token, ZERO, permitAmount, nonce, expiration, owner, transferAmount, signedPermit); isError = _transferFromERC20(token, owner, to, ZERO, transferAmount); if (isError) { _restoreNonce(owner, nonce); } } /** * @notice Transfers an ERC20 token from the owner to the recipient using a permit signature * @notice This function includes additional data to verify on the signature, allowing * @notice protocols to extend the validation in one function call. NOTE: before calling this * @notice function you MUST register the stub end of the additional data typestring using * @notice the `registerAdditionalDataHash` function. * * @dev Be advised that the token ID for ERC20 is always inferred to be 0, so signed token ID * @dev MUST always be set to 0. * * @dev - Throws for any reason permitTransferFromERC20 would. * @dev - Throws if the additional data does not match the signature * @dev - Throws if the provided hash has not been registered as a valid additional data hash * @dev - Throws if the provided hash does not match the provided additional data * @dev - Returns `false` if the transfer fails * * @dev <h4>Postconditions:</h4> * @dev 1. Transfers the token (in the requested amount) from the owner to the recipient * @dev 2. Performs any additional checks in the before and after hooks * @dev 3. The nonce of the permit is marked as used * * @param token The address of the token * @param nonce The nonce of the permit * @param permitAmount The amount of tokens permitted by the owner * @param expiration The expiration timestamp of the permit * @param owner The owner of the token * @param to The address to transfer the tokens to * @param transferAmount The amount of tokens to transfer * @param additionalData The additional data to verify on the signature * @param advancedPermitHash The hash of the additional data * @param signedPermit The permit signature, signed by the owner * * @return isError True if the transfer failed, false otherwise */ function permitTransferFromWithAdditionalDataERC20( address token, uint256 nonce, uint256 permitAmount, uint256 expiration, address owner, address to, uint256 transferAmount, bytes32 additionalData, bytes32 advancedPermitHash, bytes calldata signedPermit ) external onlyRegisteredTransferAdvancedTypeHash(advancedPermitHash) returns (bool isError) { _requireNotPaused(PAUSABLE_PERMITTED_TRANSFER_FROM_ERC20); _checkPermitApprovalWithAdditionalDataERC20( token, ZERO, permitAmount, nonce, expiration, owner, transferAmount, signedPermit, additionalData, advancedPermitHash ); isError = _transferFromERC20(token, owner, to, ZERO, transferAmount); if (isError) { _restoreNonce(owner, nonce); } } /** * @notice Returns true if the provided hash has been registered as a valid additional data hash for transfers. * * @param hash The hash to check * * @return isRegistered true if the hash is valid, false otherwise */ function isRegisteredTransferAdditionalDataHash(bytes32 hash) external view returns (bool isRegistered) { isRegistered = _registeredTransferHashes[hash]; } /** * @notice Returns true if the provided hash has been registered as a valid additional data hash for orders. * * @param hash The hash to check * * @return isRegistered true if the hash is valid, false otherwise */ function isRegisteredOrderAdditionalDataHash(bytes32 hash) external view returns (bool isRegistered) { isRegistered = _registeredOrderHashes[hash]; } /** * ================================================= * =============== Order Transfers ================= * ================================================= */ /** * @notice Transfers an ERC1155 token from the owner to the recipient using a permit signature * @notice Order transfers are used to transfer a specific amount of a token from a specific order * @notice and allow for multiple uses of the same permit up to the allocated amount. NOTE: before calling this * @notice function you MUST register the stub end of the additional data typestring using * @notice the `registerAdditionalDataHash` function. * * @dev - Throws if the permit is expired * @dev - Throws if the permit is not signed by the owner * @dev - Throws if the requested amount + amount already filled exceeds the permitted amount * @dev - Throws if the requested amount is less than the minimum fill amount * @dev - Throws if the provided token address does not implement ERC1155 safeTransferFrom function * @dev - Throws if the provided advanced permit hash has not been registered * @dev - Returns `false` if the transfer fails * * @dev <h4>Postconditions:</h4> * @dev 1. Transfers the token (in the requested amount) from the owner to the recipient * @dev 2. Updates the amount filled for the order ID * @dev 3. If completely filled, marks the order as filled * * @param signedPermit The permit signature, signed by the owner * @param orderFillAmounts The amount of tokens to transfer * @param token The address of the token * @param id The ID of the token * @param owner The owner of the token * @param to The address to transfer the tokens to * @param salt The salt of the permit * @param expiration The expiration timestamp of the permit * @param orderId The order ID * @param advancedPermitHash The hash of the additional data * * @return quantityFilled The amount of tokens filled * @return isError True if the transfer failed, false otherwise */ function fillPermittedOrderERC1155( bytes calldata signedPermit, OrderFillAmounts calldata orderFillAmounts, address token, uint256 id, address owner, address to, uint256 salt, uint48 expiration, bytes32 orderId, bytes32 advancedPermitHash ) external onlyRegisteredOrderAdvancedTypeHash(advancedPermitHash) returns (uint256 quantityFilled, bool isError) { _requireNotPaused(PAUSABLE_ORDER_TRANSFER_FROM_ERC1155); PackedApproval storage orderStatus = _checkOrderTransferERC1155( signedPermit, orderFillAmounts, token, id, owner, salt, expiration, orderId, advancedPermitHash ); ( quantityFilled, isError ) = _orderTransfer( orderStatus, orderFillAmounts, token, id, owner, to, orderId, _transferFromERC1155 ); if (isError) { _restoreFillableItems(orderStatus, owner, orderId, quantityFilled, true); } } /** * @notice Transfers an ERC20 token from the owner to the recipient using a permit signature * @notice Order transfers are used to transfer a specific amount of a token from a specific order * @notice and allow for multiple uses of the same permit up to the allocated amount. NOTE: before calling this * @notice function you MUST register the stub end of the additional data typestring using * @notice the `registerAdditionalDataHash` function. * * @dev - Throws if the permit is expired * @dev - Throws if the permit is not signed by the owner * @dev - Throws if the requested amount + amount already filled exceeds the permitted amount * @dev - Throws if the requested amount is less than the minimum fill amount * @dev - Throws if the provided token address does not implement ERC20 transferFrom function * @dev - Throws if the provided advanced permit hash has not been registered * @dev - Returns `false` if the transfer fails * * @dev <h4>Postconditions:</h4> * @dev 1. Transfers the token (in the requested amount) from the owner to the recipient * @dev 2. Updates the amount filled for the order ID * @dev 3. If completely filled, marks the order as filled * * @param signedPermit The permit signature, signed by the owner * @param orderFillAmounts The amount of tokens to transfer * @param token The address of the token * @param owner The owner of the token * @param to The address to transfer the tokens to * @param salt The salt of the permit * @param expiration The expiration timestamp of the permit * @param orderId The order ID * @param advancedPermitHash The hash of the additional data * * @return quantityFilled The amount of tokens filled * @return isError True if the transfer failed, false otherwise */ function fillPermittedOrderERC20( bytes calldata signedPermit, OrderFillAmounts calldata orderFillAmounts, address token, address owner, address to, uint256 salt, uint48 expiration, bytes32 orderId, bytes32 advancedPermitHash ) external onlyRegisteredOrderAdvancedTypeHash(advancedPermitHash) returns (uint256 quantityFilled, bool isError) { _requireNotPaused(PAUSABLE_ORDER_TRANSFER_FROM_ERC20); PackedApproval storage orderStatus = _checkOrderTransferERC20( signedPermit, orderFillAmounts, token, ZERO, owner, salt, expiration, orderId, advancedPermitHash ); ( quantityFilled, isError ) = _orderTransfer( orderStatus, orderFillAmounts, token, ZERO, owner, to, orderId, _transferFromERC20 ); if (isError) { _restoreFillableItems(orderStatus, owner, orderId, quantityFilled, true); } } /** * @notice Closes an outstanding order to prevent further execution of transfers. * * @dev - Throws if the order is not in the open state * * @dev <h4>Postconditions:</h4> * @dev 1. Marks the order as cancelled * @dev 2. Sets the order amount to 0 * @dev 3. Sets the order expiration to 0 * @dev 4. Emits a OrderClosed event * * @param owner The owner of the token * @param operator The operator allowed to transfer the token * @param tokenType The type of token the order is for - must be 20, 721 or 1155. * @param token The address of the token contract * @param id The token ID * @param orderId The order ID */ function closePermittedOrder( address owner, address operator, uint256 tokenType, address token, uint256 id, bytes32 orderId ) external { if(!(msg.sender == owner || msg.sender == operator)) { revert PermitC__CallerMustBeOwnerOrOperator(); } _requireValidTokenType(tokenType); PackedApproval storage orderStatus = _getPackedApprovalPtr(_orderApprovals, owner, tokenType, token, id, orderId, operator); if (orderStatus.state == ORDER_STATE_OPEN) { orderStatus.state = ORDER_STATE_CANCELLED; orderStatus.amount = 0; orderStatus.expiration = 0; emit OrderClosed(orderId, owner, operator, true); } else { revert PermitC__OrderIsEitherCancelledOrFilled(); } } /** * @notice Returns the amount of allowance an operator has for a specific token and id * @notice If the expiration on the allowance has expired, returns 0 * * @dev Overload of the on chain allowance function for approvals with a specified order ID * * @param owner The owner of the token * @param operator The operator of the token * @param token The address of the token contract * @param id The token ID * * @return allowedAmount The amount of allowance the operator has */ function allowance( address owner, address operator, uint256 tokenType, address token, uint256 id, bytes32 orderId ) external view returns (uint256 allowedAmount, uint256 expiration) { return _allowance(_orderApprovals, owner, operator, tokenType, token, id, orderId); } /** * ================================================= * ================ Nonce Management =============== * ================================================= */ /** * @notice Invalidates the provided nonce * * @dev - Throws if the provided nonce has already been used * * @dev <h4>Postconditions:</h4> * @dev 1. Sets the provided nonce as used for the sender * * @param nonce Nonce to invalidate */ function invalidateUnorderedNonce(uint256 nonce) external { _checkAndInvalidateNonce(msg.sender, nonce); } /** * @notice Returns if the provided nonce has been used * * @param owner The owner of the token * @param nonce The nonce to check * * @return isValid true if the nonce is valid, false otherwise */ function isValidUnorderedNonce(address owner, uint256 nonce) external view returns (bool isValid) { isValid = ((_unorderedNonces[owner][uint248(nonce >> 8)] >> uint8(nonce)) & ONE) == ZERO; } /** * @notice Revokes all outstanding approvals for the sender * * @dev <h4>Postconditions:</h4> * @dev 1. Increments the master nonce for the sender * @dev 2. All outstanding approvals for the sender are invalidated */ function lockdown() external { unchecked { _masterNonces[msg.sender]++; } emit Lockdown(msg.sender); } /** * @notice Returns the master nonce for the provided owner address * * @param owner The owner address * * @return The master nonce */ function masterNonce(address owner) external view returns (uint256) { return _masterNonces[owner]; } /** * ================================================= * ============== Transfer Functions =============== * ================================================= */ /** * @notice Transfer an ERC721 token from the owner to the recipient using on chain approvals * * @dev Public transfer function overload for approval transfers * @dev - Throws if the provided token address does not implement ERC721 transferFrom function * @dev - Throws if the requested amount exceeds the approved amount * @dev - Throws if the approval is expired * @dev - Returns `false` if the transfer fails * * @dev <h4>Postconditions:</h4> * @dev 1. Transfers the token (in the requested amount) from the owner to the recipient * @dev 2. Decrements the approval amount by the requested amount * @dev 3. Performs any additional checks in the before and after hooks * * @param owner The owner of the token * @param to The recipient of the token * @param token The address of the token * @param id The id of the token * * @return isError True if the transfer failed, false otherwise */ function transferFromERC721( address owner, address to, address token, uint256 id ) external returns (bool isError) { _requireNotPaused(PAUSABLE_APPROVAL_TRANSFER_FROM_ERC721); PackedApproval storage approval = _checkAndUpdateApproval(owner, TOKEN_TYPE_ERC721, token, id, ONE, true); isError = _transferFromERC721(owner, to, token, id); if (isError) { _restoreFillableItems(approval, owner, ZERO_BYTES32, ONE, false); } } /** * @notice Transfer an ERC1155 token from the owner to the recipient using on chain approvals * * @dev Public transfer function overload for approval transfers * @dev - Throws if the provided token address does not implement ERC1155 safeTransferFrom function * @dev - Throws if the requested amount exceeds the approved amount * @dev - Throws if the approval is expired * @dev - Returns `false` if the transfer fails * * @dev <h4>Postconditions:</h4> * @dev 1. Transfers the token (in the requested amount) from the owner to the recipient * @dev 2. Decrements the approval amount by the requested amount * @dev 3. Performs any additional checks in the before and after hooks * * @param owner The owner of the token * @param to The recipient of the token * @param amount The amount of the token to transfer * @param token The address of the token * @param id The id of the token * * @return isError True if the transfer failed, false otherwise */ function transferFromERC1155( address owner, address to, address token, uint256 id, uint256 amount ) external returns (bool isError) { _requireNotPaused(PAUSABLE_APPROVAL_TRANSFER_FROM_ERC1155); PackedApproval storage approval = _checkAndUpdateApproval(owner, TOKEN_TYPE_ERC1155, token, id, amount, false); isError = _transferFromERC1155(token, owner, to, id, amount); if (isError) { _restoreFillableItems(approval, owner, ZERO_BYTES32, amount, false); } } /** * @notice Transfer an ERC20 token from the owner to the recipient using on chain approvals * * @dev Public transfer function overload for approval transfers * @dev - Throws if the provided token address does not implement ERC20 transferFrom function * @dev - Throws if the requested amount exceeds the approved amount * @dev - Throws if the approval is expired * @dev - Returns `false` if the transfer fails * * @dev <h4>Postconditions:</h4> * @dev 1. Transfers the token (in the requested amount) from the owner to the recipient * @dev 2. Decrements the approval amount by the requested amount * @dev 3. Performs any additional checks in the before and after hooks * * @param owner The owner of the token * @param to The recipient of the token * @param amount The amount of the token to transfer * @param token The address of the token * * @return isError True if the transfer failed, false otherwise */ function transferFromERC20( address owner, address to, address token, uint256 amount ) external returns (bool isError) { _requireNotPaused(PAUSABLE_APPROVAL_TRANSFER_FROM_ERC20); PackedApproval storage approval = _checkAndUpdateApproval(owner, TOKEN_TYPE_ERC20, token, ZERO, amount, false); isError = _transferFromERC20(token, owner, to, ZERO, amount); if (isError) { _restoreFillableItems(approval, owner, ZERO_BYTES32, amount, false); } } /** * @notice Performs a transfer of an ERC721 token. * * @dev Will **NOT** attempt transfer if `_beforeTransferFrom` hook returns false. * @dev Will **NOT** revert if the transfer is unsucessful. * @dev Invokers **MUST** check `isError` return value to determine success. * * @param owner The owner of the token being transferred * @param to The address to transfer the token to * @param token The token address of the token being transferred * @param id The token id being transferred * * @return isError True if the token was not transferred, false if token was transferred */ function _transferFromERC721( address owner, address to, address token, uint256 id ) private returns (bool isError) { isError = _beforeTransferFrom(TOKEN_TYPE_ERC721, token, owner, to, id, ONE); if (!isError) { try IERC721(token).transferFrom(owner, to, id) { } catch { isError = true; } } } /** * @notice Performs a transfer of an ERC1155 token. * * @dev Will **NOT** attempt transfer if `_beforeTransferFrom` hook returns false. * @dev Will **NOT** revert if the transfer is unsucessful. * @dev Invokers **MUST** check `isError` return value to determine success. * * @param token The token address of the token being transferred * @param owner The owner of the token being transferred * @param to The address to transfer the token to * @param id The token id being transferred * @param amount The quantity of token id to transfer * * @return isError True if the token was not transferred, false if token was transferred */ function _transferFromERC1155( address token, address owner, address to, uint256 id, uint256 amount ) private returns (bool isError) { isError = _beforeTransferFrom(TOKEN_TYPE_ERC1155, token, owner, to, id, amount); if (!isError) { try IERC1155(token).safeTransferFrom(owner, to, id, amount, "") { } catch { isError = true; } } } /** * @notice Performs a transfer of an ERC20 token. * * @dev Will **NOT** attempt transfer if `_beforeTransferFrom` hook returns false. * @dev Will **NOT** revert if the transfer is unsucessful. * @dev Invokers **MUST** check `isError` return value to determine success. * * @param token The token address of the token being transferred * @param owner The owner of the token being transferred * @param to The address to transfer the token to * @param amount The quantity of token id to transfer * * @return isError True if the token was not transferred, false if token was transferred */ function _transferFromERC20( address token, address owner, address to, uint256 /*id*/, uint256 amount ) private returns (bool isError) { isError = _beforeTransferFrom(TOKEN_TYPE_ERC20, token, owner, to, ZERO, amount); if (!isError) { (bool success, bytes memory data) = token.call(abi.encodeWithSelector(IERC20.transferFrom.selector, owner, to, amount)); if (!success) { isError = true; } else if (data.length > 0) { isError = !abi.decode(data, (bool)); } } } /** * ================================================= * ============ Signature Verification ============= * ================================================= */ /** * @notice Returns the domain separator used in the permit signature * * @return domainSeparator The domain separator */ function domainSeparatorV4() external view returns (bytes32 domainSeparator) { domainSeparator = _domainSeparatorV4(); } /** * @notice Verifies a permit signature based on the bytes length of the signature provided. * * @dev Throws when - * @dev The bytes signature length is 64 or 65 bytes AND * @dev The ECDSA recovered signer is not the owner AND * @dev The owner's code length is zero OR the owner does not return a valid EIP-1271 response * @dev * @dev OR * @dev * @dev The bytes signature length is not 64 or 65 bytes AND * @dev The owner's code length is zero OR the owner does not return a valid EIP-1271 response */ function _verifyPermitSignature(bytes32 digest, bytes calldata signature, address owner) private view { if (signature.length == 65) { bytes32 r; bytes32 s; uint8 v; // Divide the signature in r, s and v variables /// @solidity memory-safe-assembly assembly { r := calldataload(signature.offset) s := calldataload(add(signature.offset, 32)) v := byte(0, calldataload(add(signature.offset, 64))) } (bool isError, address signer) = _ecdsaRecover(digest, v, r, s); if (owner != signer || isError) { _verifyEIP1271Signature(owner, digest, signature); } } else if (signature.length == 64) { bytes32 r; bytes32 vs; // Divide the signature in r and vs variables /// @solidity memory-safe-assembly assembly { r := calldataload(signature.offset) vs := calldataload(add(signature.offset, 32)) } (bool isError, address signer) = _ecdsaRecover(digest, r, vs); if (owner != signer || isError) { _verifyEIP1271Signature(owner, digest, signature); } } else { _verifyEIP1271Signature(owner, digest, signature); } } /** * @notice Verifies an EIP-1271 signature. * * @dev Throws when `signer` code length is zero OR the EIP-1271 call does not * @dev return the correct magic value. * * @param signer The signer address to verify a signature with * @param hash The hash digest to verify with the signer * @param signature The signature to verify */ function _verifyEIP1271Signature(address signer, bytes32 hash, bytes calldata signature) private view { if(signer.code.length == 0) { revert PermitC__SignatureTransferInvalidSignature(); } if (!_safeIsValidSignature(signer, hash, signature)) { revert PermitC__SignatureTransferInvalidSignature(); } } /** * @notice Overload of the `_ecdsaRecover` function to unpack the `v` and `s` values * * @param digest The hash digest that was signed * @param r The `r` value of the signature * @param vs The packed `v` and `s` values of the signature * * @return isError True if the ECDSA function is provided invalid inputs * @return signer The recovered address from ECDSA */ function _ecdsaRecover(bytes32 digest, bytes32 r, bytes32 vs) private pure returns (bool isError, address signer) { unchecked { bytes32 s = vs & UPPER_BIT_MASK; uint8 v = uint8(uint256(vs >> 255)) + 27; (isError, signer) = _ecdsaRecover(digest, v, r, s); } } /** * @notice Recovers the signer address using ECDSA * * @dev Does **NOT** revert if invalid input values are provided or `signer` is recovered as address(0) * @dev Returns an `isError` value in those conditions that is handled upstream * * @param digest The hash digest that was signed * @param v The `v` value of the signature * @param r The `r` value of the signature * @param s The `s` value of the signature * * @return isError True if the ECDSA function is provided invalid inputs * @return signer The recovered address from ECDSA */ function _ecdsaRecover(bytes32 digest, uint8 v, bytes32 r, bytes32 s) private pure returns (bool isError, address signer) { if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) { // Invalid signature `s` value - return isError = true and signer = address(0) to check EIP-1271 return (true, address(0)); } signer = ecrecover(digest, v, r, s); isError = (signer == address(0)); } /** * @notice A gas efficient, and fallback-safe way to call the isValidSignature function for EIP-1271. * * @param signer The EIP-1271 signer to call to check for a valid signature. * @param hash The hash digest to verify with the EIP-1271 signer. * @param signature The supplied signature to verify. * * @return isValid True if the EIP-1271 signer returns the EIP-1271 magic value. */ function _safeIsValidSignature( address signer, bytes32 hash, bytes calldata signature ) private view returns(bool isValid) { assembly { function _callIsValidSignature(_signer, _hash, _signatureOffset, _signatureLength) -> _isValid { let ptr := mload(0x40) // store isValidSignature(bytes32,bytes) selector mstore(ptr, hex"1626ba7e") // store bytes32 hash value in abi encoded location mstore(add(ptr, 0x04), _hash) // store abi encoded location of the bytes signature data mstore(add(ptr, 0x24), 0x40) // store bytes signature length mstore(add(ptr, 0x44), _signatureLength) // copy calldata bytes signature to memory calldatacopy(add(ptr, 0x64), _signatureOffset, _signatureLength) // calculate data length based on abi encoded data with rounded up signature length let dataLength := add(0x64, and(add(_signatureLength, 0x1F), not(0x1F))) // update free memory pointer mstore(0x40, add(ptr, dataLength)) // static call _signer with abi encoded data // skip return data check if call failed or return data size is not at least 32 bytes if and(iszero(lt(returndatasize(), 0x20)), staticcall(gas(), _signer, ptr, dataLength, 0x00, 0x20)) { // check if return data is equal to isValidSignature magic value _isValid := eq(mload(0x00), hex"1626ba7e") leave } } isValid := _callIsValidSignature(signer, hash, signature.offset, signature.length) } } /** * ================================================= * ===================== Hooks ===================== * ================================================= */ /** * @dev This function is empty by default. Override it to add additional logic after the approval transfer. * @dev The function returns a boolean value instead of reverting to indicate if there is an error for more granular control in inheriting protocols. */ function _beforeTransferFrom(uint256 tokenType, address token, address owner, address to, uint256 id, uint256 amount) internal virtual returns (bool isError) {} /** * ================================================= * ==================== Internal =================== * ================================================= */ /** * @notice Checks if an advanced permit typehash has been registered with PermitC * * @dev Throws when the typehash has not been registered * * @param advancedPermitHash The permit typehash to check */ function _requireTransferAdvancedPermitHashIsRegistered(bytes32 advancedPermitHash) private view { if (!_registeredTransferHashes[advancedPermitHash]) { revert PermitC__SignatureTransferPermitHashNotRegistered(); } } /** * @notice Checks if an advanced permit typehash has been registered with PermitC * * @dev Throws when the typehash has not been registered * * @param advancedPermitHash The permit typehash to check */ function _requireOrderAdvancedPermitHashIsRegistered(bytes32 advancedPermitHash) private view { if (!_registeredOrderHashes[advancedPermitHash]) { revert PermitC__SignatureTransferPermitHashNotRegistered(); } } /** * @notice Invalidates an account nonce if it has not been previously used * * @dev Throws when the nonce was previously used * * @param account The account to invalidate the nonce of * @param nonce The nonce to invalidate */ function _checkAndInvalidateNonce(address account, uint256 nonce) private { unchecked { if (uint256(_unorderedNonces[account][uint248(nonce >> 8)] ^= (ONE << uint8(nonce))) & (ONE << uint8(nonce)) == ZERO) { revert PermitC__NonceAlreadyUsedOrRevoked(); } } } /** * @notice Checks an approval to ensure it is sufficient for the `amount` to send * * @dev Throws when the approval is expired * @dev Throws when the approved amount is insufficient * * @param owner The owner of the token * @param tokenType The type of token * @param token The address of the token * @param id The id of the token * @param amount The amount to deduct from the approval * @param zeroOutApproval True if the approval should be set to zero * * @return approval Storage pointer for the approval data */ function _checkAndUpdateApproval( address owner, uint256 tokenType, address token, uint256 id, uint256 amount, bool zeroOutApproval ) private returns (PackedApproval storage approval) { approval = _getPackedApprovalPtr(_transferApprovals, owner, tokenType, token, id, ZERO_BYTES32, msg.sender); if (approval.expiration < block.timestamp) { revert PermitC__ApprovalTransferPermitExpiredOrUnset(); } if (approval.amount < amount) { revert PermitC__ApprovalTransferExceededPermittedAmount(); } if(zeroOutApproval) { approval.amount = 0; } else if (approval.amount < type(uint200).max) { unchecked { approval.amount -= uint200(amount); } } } /** * @notice Gets the storage pointer for an approval * * @param _approvals The mapping to retrieve the approval from * @param account The account the approval is from * @param tokenType The type of token the approval is for * @param token The address of the token * @param id The id of the token * @param orderId The order id for the approval * @param operator The operator for the approval * * @return approval Storage pointer for the approval data */ function _getPackedApprovalPtr( mapping(bytes32 => mapping(address => PackedApproval)) storage _approvals, address account, uint256 tokenType, address token, uint256 id, bytes32 orderId, address operator ) private view returns (PackedApproval storage approval) { approval = _approvals[_getPackedApprovalKey(account, tokenType, token, id, orderId)][operator]; } /** * @notice Gets the storage key for the mapping for a specific approval * * @param owner The owner of the token * @param tokenType The type of token * @param token The address of the token * @param id The id of the token * @param orderId The order id of the approval * * @return key The key value to use to access the approval in the mapping */ function _getPackedApprovalKey(address owner, uint256 tokenType, address token, uint256 id, bytes32 orderId) private view returns (bytes32 key) { key = keccak256(abi.encode(owner, tokenType, token, id, orderId, _masterNonces[owner])); } /** * @notice Checks the permit approval for a single use permit without additional data * * @dev Throws when the `nonce` has already been consumed * @dev Throws when the permit amount is less than the transfer amount * @dev Throws when the permit is expired * @dev Throws when the signature is invalid * * @param tokenType The type of token * @param token The address of the token * @param id The id of the token * @param permitAmount The amount authorized by the owner signature * @param nonce The nonce of the permit * @param expiration The time the permit expires * @param owner The owner of the token * @param transferAmount The amount of tokens requested to transfer * @param signedPermit The signature for the permit */ function _checkPermitApproval( uint256 tokenType, address token, uint256 id, uint256 permitAmount, uint256 nonce, uint256 expiration, address owner, uint256 transferAmount, bytes calldata signedPermit ) private { bytes32 digest = _hashTypedDataV4( PermitHash.hashSingleUsePermit( tokenType, token, id, permitAmount, nonce, expiration, _masterNonces[owner] ) ); _checkPermitData( nonce, expiration, transferAmount, permitAmount, owner, digest, signedPermit ); } /** * @notice Overload of `_checkPermitApprovalWithAdditionalData` to supply TOKEN_TYPE_ERC1155 * * @dev Prevents stack too deep in `permitTransferFromWithAdditionalDataERC1155` * @dev Throws when the `nonce` has already been consumed * @dev Throws when the permit amount is less than the transfer amount * @dev Throws when the permit is expired * @dev Throws when the signature is invalid * * @param token The address of the token * @param id The id of the token * @param permitAmount The amount authorized by the owner signature * @param nonce The nonce of the permit * @param expiration The time the permit expires * @param owner The owner of the token * @param transferAmount The amount of tokens requested to transfer * @param signedPermit The signature for the permit * @param additionalData The additional data to validate with the permit signature * @param advancedPermitHash The typehash of the permit to use for validating the signature */ function _checkPermitApprovalWithAdditionalDataERC1155( address token, uint256 id, uint256 permitAmount, uint256 nonce, uint256 expiration, address owner, uint256 transferAmount, bytes calldata signedPermit, bytes32 additionalData, bytes32 advancedPermitHash ) private { _checkPermitApprovalWithAdditionalData( TOKEN_TYPE_ERC1155, token, id, permitAmount, nonce, expiration, owner, transferAmount, signedPermit, additionalData, advancedPermitHash ); } /** * @notice Overload of `_checkPermitApprovalWithAdditionalData` to supply TOKEN_TYPE_ERC20 * * @dev Prevents stack too deep in `permitTransferFromWithAdditionalDataERC220` * @dev Throws when the `nonce` has already been consumed * @dev Throws when the permit amount is less than the transfer amount * @dev Throws when the permit is expired * @dev Throws when the signature is invalid * * @param token The address of the token * @param id The id of the token * @param permitAmount The amount authorized by the owner signature * @param nonce The nonce of the permit * @param expiration The time the permit expires * @param owner The owner of the token * @param transferAmount The amount of tokens requested to transfer * @param signedPermit The signature for the permit * @param additionalData The additional data to validate with the permit signature * @param advancedPermitHash The typehash of the permit to use for validating the signature */ function _checkPermitApprovalWithAdditionalDataERC20( address token, uint256 id, uint256 permitAmount, uint256 nonce, uint256 expiration, address owner, uint256 transferAmount, bytes calldata signedPermit, bytes32 additionalData, bytes32 advancedPermitHash ) private { _checkPermitApprovalWithAdditionalData( TOKEN_TYPE_ERC20, token, id, permitAmount, nonce, expiration, owner, transferAmount, signedPermit, additionalData, advancedPermitHash ); } /** * @notice Overload of `_checkPermitApprovalWithAdditionalData` to supply TOKEN_TYPE_ERC721 * * @dev Prevents stack too deep in `permitTransferFromWithAdditionalDataERC721` * @dev Throws when the `nonce` has already been consumed * @dev Throws when the permit amount is less than the transfer amount * @dev Throws when the permit is expired * @dev Throws when the signature is invalid * * @param token The address of the token * @param id The id of the token * @param permitAmount The amount authorized by the owner signature * @param nonce The nonce of the permit * @param expiration The time the permit expires * @param owner The owner of the token * @param transferAmount The amount of tokens requested to transfer * @param signedPermit The signature for the permit * @param additionalData The additional data to validate with the permit signature * @param advancedPermitHash The typehash of the permit to use for validating the signature */ function _checkPermitApprovalWithAdditionalDataERC721( address token, uint256 id, uint256 permitAmount, uint256 nonce, uint256 expiration, address owner, uint256 transferAmount, bytes calldata signedPermit, bytes32 additionalData, bytes32 advancedPermitHash ) private { _checkPermitApprovalWithAdditionalData( TOKEN_TYPE_ERC721, token, id, permitAmount, nonce, expiration, owner, transferAmount, signedPermit, additionalData, advancedPermitHash ); } /** * @notice Checks the permit approval for a single use permit with additional data * * @dev Throws when the `nonce` has already been consumed * @dev Throws when the permit amount is less than the transfer amount * @dev Throws when the permit is expired * @dev Throws when the signature is invalid * * @param tokenType The type of token * @param token The address of the token * @param id The id of the token * @param permitAmount The amount authorized by the owner signature * @param nonce The nonce of the permit * @param expiration The time the permit expires * @param owner The owner of the token * @param transferAmount The amount of tokens requested to transfer * @param signedPermit The signature for the permit * @param additionalData The additional data to validate with the permit signature * @param advancedPermitHash The typehash of the permit to use for validating the signature */ function _checkPermitApprovalWithAdditionalData( uint256 tokenType, address token, uint256 id, uint256 permitAmount, uint256 nonce, uint256 expiration, address owner, uint256 transferAmount, bytes calldata signedPermit, bytes32 additionalData, bytes32 advancedPermitHash ) private { bytes32 digest = _getAdvancedTypedDataV4PermitHash( tokenType, token, id, permitAmount, owner, nonce, expiration, additionalData, advancedPermitHash ); _checkPermitData( nonce, expiration, transferAmount, permitAmount, owner, digest, signedPermit ); } /** * @notice Checks that a single use permit has not expired, was authorized for the amount * @notice being transferred, has a valid nonce and has a valid signature. * * @dev Throws when the `nonce` has already been consumed * @dev Throws when the permit amount is less than the transfer amount * @dev Throws when the permit is expired * @dev Throws when the signature is invalid * * @param nonce The nonce of the permit * @param expiration The time the permit expires * @param transferAmount The amount of tokens requested to transfer * @param permitAmount The amount authorized by the owner signature * @param owner The owner of the token * @param digest The digest that was signed by the owner * @param signedPermit The signature for the permit */ function _checkPermitData( uint256 nonce, uint256 expiration, uint256 transferAmount, uint256 permitAmount, address owner, bytes32 digest, bytes calldata signedPermit ) private { if (block.timestamp > expiration) { revert PermitC__SignatureTransferExceededPermitExpired(); } if (transferAmount > permitAmount) { revert PermitC__SignatureTransferExceededPermittedAmount(); } _checkAndInvalidateNonce(owner, nonce); _verifyPermitSignature(digest, signedPermit, owner); } /** * @notice Stores an approval for future use by `operator` to move tokens on behalf of `owner` * * @param tokenType The type of token * @param token The address of the token * @param id The id of the token * @param amount The amount authorized by the owner * @param expiration The time the permit expires * @param owner The owner of the token * @param operator The account allowed to transfer the tokens */ function _storeApproval( uint256 tokenType, address token, uint256 id, uint200 amount, uint48 expiration, address owner, address operator ) private { PackedApproval storage approval = _getPackedApprovalPtr(_transferApprovals, owner, tokenType, token, id, ZERO_BYTES32, operator); approval.expiration = expiration; approval.amount = amount; emit Approval(owner, token, operator, id, amount, expiration); } /** * @notice Overload of `_checkOrderTransfer` to supply TOKEN_TYPE_ERC1155 * * @dev Prevents stack too deep in `fillPermittedOrderERC1155` * @dev Throws when the order start amount is greater than type(uint200).max * @dev Throws when the order status is not open * @dev Throws when the signature is invalid * @dev Throws when the permit is expired * * @param signedPermit The signature for the permit * @param orderFillAmounts A struct containing the order start, requested fill and minimum fill amounts * @param token The address of the token * @param id The id of the token * @param owner The owner of the token * @param salt The salt value for the permit * @param expiration The time the permit expires * @param orderId The order id for the permit * @param advancedPermitHash The typehash of the permit to use for validating the signature * * @return orderStatus Storage pointer for the approval data */ function _checkOrderTransferERC1155( bytes calldata signedPermit, OrderFillAmounts calldata orderFillAmounts, address token, uint256 id, address owner, uint256 salt, uint48 expiration, bytes32 orderId, bytes32 advancedPermitHash ) private returns (PackedApproval storage orderStatus) { orderStatus = _checkOrderTransfer( signedPermit, orderFillAmounts, TOKEN_TYPE_ERC1155, token, id, owner, salt, expiration, orderId, advancedPermitHash ); } /** * @notice Overload of `_checkOrderTransfer` to supply TOKEN_TYPE_ERC20 * * @dev Prevents stack too deep in `fillPermittedOrderERC20` * @dev Throws when the order start amount is greater than type(uint200).max * @dev Throws when the order status is not open * @dev Throws when the signature is invalid * @dev Throws when the permit is expired * * @param signedPermit The signature for the permit * @param orderFillAmounts A struct containing the order start, requested fill and minimum fill amounts * @param token The address of the token * @param id The id of the token * @param owner The owner of the token * @param salt The salt value for the permit * @param expiration The time the permit expires * @param orderId The order id for the permit * @param advancedPermitHash The typehash of the permit to use for validating the signature * * @return orderStatus Storage pointer for the approval data */ function _checkOrderTransferERC20( bytes calldata signedPermit, OrderFillAmounts calldata orderFillAmounts, address token, uint256 id, address owner, uint256 salt, uint48 expiration, bytes32 orderId, bytes32 advancedPermitHash ) private returns (PackedApproval storage orderStatus) { orderStatus = _checkOrderTransfer( signedPermit, orderFillAmounts, TOKEN_TYPE_ERC20, token, id, owner, salt, expiration, orderId, advancedPermitHash ); } /** * @notice Validates an order transfer to check order start amount, status, signature if not previously * @notice opened, and expiration. * * @dev Throws when the order start amount is greater than type(uint200).max * @dev Throws when the order status is not open * @dev Throws when the signature is invalid * @dev Throws when the permit is expired * * @param signedPermit The signature for the permit * @param orderFillAmounts A struct containing the order start, requested fill and minimum fill amounts * @param tokenType The type of token * @param token The address of the token * @param id The id of the token * @param owner The owner of the token * @param salt The salt value for the permit * @param expiration The time the permit expires * @param orderId The order id for the permit * @param advancedPermitHash The typehash of the permit to use for validating the signature * * @return orderStatus Storage pointer for the approval data */ function _checkOrderTransfer( bytes calldata signedPermit, OrderFillAmounts calldata orderFillAmounts, uint256 tokenType, address token, uint256 id, address owner, uint256 salt, uint48 expiration, bytes32 orderId, bytes32 advancedPermitHash ) private returns (PackedApproval storage orderStatus) { if (orderFillAmounts.orderStartAmount > type(uint200).max) { revert PermitC__AmountExceedsStorageMaximum(); } orderStatus = _getPackedApprovalPtr(_orderApprovals, owner, tokenType, token, id, orderId, msg.sender); if (orderStatus.state == ORDER_STATE_OPEN) { if (orderStatus.amount == 0) { _verifyPermitSignature( _getAdvancedTypedDataV4PermitHash( tokenType, token, id, orderFillAmounts.orderStartAmount, owner, salt, expiration, orderId, advancedPermitHash ), signedPermit, owner ); orderStatus.amount = uint200(orderFillAmounts.orderStartAmount); orderStatus.expiration = expiration; emit OrderOpened(orderId, owner, msg.sender, orderFillAmounts.orderStartAmount); } if (block.timestamp > orderStatus.expiration) { revert PermitC__SignatureTransferExceededPermitExpired(); } } else { revert PermitC__OrderIsEitherCancelledOrFilled(); } } /** * @notice Checks the order fill amounts against approval data and transfers tokens, updates * @notice approval if the fill results in the order being closed. * * @dev Throws when the amount to fill is less than the minimum fill amount * * @param orderStatus Storage pointer for the approval data * @param orderFillAmounts A struct containing the order start, requested fill and minimum fill amounts * @param token The address of the token * @param id The id of the token * @param owner The owner of the token * @param to The address to send the tokens to * @param orderId The order id for the permit * @param _transferFrom Function pointer of the transfer function to send tokens with * * @return quantityFilled The number of tokens filled in the order * @return isError True if there was an error transferring tokens, false otherwise */ function _orderTransfer( PackedApproval storage orderStatus, OrderFillAmounts calldata orderFillAmounts, address token, uint256 id, address owner, address to, bytes32 orderId, function (address, address, address, uint256, uint256) internal returns (bool) _transferFrom ) private returns (uint256 quantityFilled, bool isError) { quantityFilled = orderFillAmounts.requestedFillAmount; if (quantityFilled > orderStatus.amount) { quantityFilled = orderStatus.amount; } if (quantityFilled < orderFillAmounts.minimumFillAmount) { revert PermitC__UnableToFillMinimumRequestedQuantity(); } unchecked { orderStatus.amount -= uint200(quantityFilled); emit OrderFilled(orderId, owner, msg.sender, quantityFilled); } if (orderStatus.amount == 0) { orderStatus.state = ORDER_STATE_FILLED; emit OrderClosed(orderId, owner, msg.sender, false); } isError = _transferFrom(token, owner, to, id, quantityFilled); } /** * @notice Restores an account's nonce when a transfer was not successful * * @dev Throws when the nonce was not already consumed * * @param account The account to restore the nonce of * @param nonce The nonce to restore */ function _restoreNonce(address account, uint256 nonce) private { unchecked { if (uint256(_unorderedNonces[account][uint248(nonce >> 8)] ^= (ONE << uint8(nonce))) & (ONE << uint8(nonce)) != ZERO) { revert PermitC__NonceNotUsedOrRevoked(); } } } /** * @notice Restores an approval amount when a transfer was not successful * * @param approval Storage pointer for the approval data * @param owner The owner of the tokens * @param orderId The order id to restore approval amount on * @param unfilledAmount The amount that was not filled on the order * @param isOrderPermit True if the fill restoration is for an permit order */ function _restoreFillableItems( PackedApproval storage approval, address owner, bytes32 orderId, uint256 unfilledAmount, bool isOrderPermit ) private { if (unfilledAmount > 0) { if (isOrderPermit) { // Order permits always deduct amount and must be restored unchecked { approval.amount += uint200(unfilledAmount); } approval.state = ORDER_STATE_OPEN; emit OrderRestored(orderId, owner, unfilledAmount); } else if (approval.amount < type(uint200).max) { // Stored approvals only deduct amount unchecked { approval.amount += uint200(unfilledAmount); } } } } function _requireValidTokenType(uint256 tokenType) private pure { if(!( tokenType == TOKEN_TYPE_ERC721 || tokenType == TOKEN_TYPE_ERC1155 || tokenType == TOKEN_TYPE_ERC20 ) ) { revert PermitC__InvalidTokenType(); } } /** * @notice Generates an EIP-712 digest for a permit * * @param tokenType The type of token * @param token The address of the token * @param id The id of the token * @param amount The amount authorized by the owner signature * @param owner The owner of the token * @param nonce The nonce for the permit * @param expiration The time the permit expires * @param additionalData The additional data to validate with the permit signature * @param advancedPermitHash The typehash of the permit to use for validating the signature * * @return digest The EIP-712 digest of the permit data */ function _getAdvancedTypedDataV4PermitHash( uint256 tokenType, address token, uint256 id, uint256 amount, address owner, uint256 nonce, uint256 expiration, bytes32 additionalData, bytes32 advancedPermitHash ) private view returns (bytes32 digest) { // cache masterNonce on stack to avoid stack too deep uint256 masterNonce_ = _masterNonces[owner]; digest = _hashTypedDataV4( PermitHash.hashSingleUsePermitWithAdditionalData( tokenType, token, id, amount, nonce, expiration, additionalData, advancedPermitHash, masterNonce_ ) ); } /** * @notice Returns the current allowed amount and expiration for a stored permit * * @dev Returns zero allowed if the permit has expired * * @param _approvals The mapping to retrieve the approval from * @param owner The account the approval is from * @param operator The operator for the approval * @param tokenType The type of token the approval is for * @param token The address of the token * @param id The id of the token * @param orderId The order id for the approval * * @return allowedAmount The amount authorized by the approval, zero if the permit has expired * @return expiration The expiration of the approval */ function _allowance( mapping(bytes32 => mapping(address => PackedApproval)) storage _approvals, address owner, address operator, uint256 tokenType, address token, uint256 id, bytes32 orderId ) private view returns (uint256 allowedAmount, uint256 expiration) { PackedApproval storage allowed = _getPackedApprovalPtr(_approvals, owner, tokenType, token, id, orderId, operator); allowedAmount = allowed.expiration < block.timestamp ? 0 : allowed.amount; expiration = allowed.expiration; } /** * @notice Allows the owner of the PermitC contract to access pausable admin functions * * @dev May be overriden by an inheriting contract to provide alternative permission structure */ function _requireCallerHasPausePermissions() internal view virtual override { _checkOwner(); } }
pragma solidity ^0.8.4; import "./IERC165.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC-165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual returns (bool) { return interfaceId == type(IERC165).interfaceId; } }
pragma solidity ^0.8.4; /** * @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. * * ```solidity * contract Example { * // Add the library methods * using EnumerableSet for EnumerableSet.AddressSet; * * // Declare a set state variable * EnumerableSet.AddressSet private mySet; * } * ``` * * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`) * and `uint256` (`UintSet`) are supported. * * [WARNING] * ==== * Trying to delete such a structure from storage will likely result in data corruption, rendering the structure * unusable. * See https://github.com/ethereum/solidity/pull/11843[ethereum/solidity#11843] for more info. * * In order to clean an EnumerableSet, you can either remove all elements one by one or create a fresh instance using an * array of EnumerableSet. * ==== */ library EnumerableSet { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position is the index of the value in the `values` array plus 1. // Position 0 is used to mean a value is not in the set. mapping(bytes32 value => uint256) _positions; } /** * @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._positions[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 cache the value's position to prevent multiple reads from the same storage slot uint256 position = set._positions[value]; if (position != 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 valueIndex = position - 1; uint256 lastIndex = set._values.length - 1; if (valueIndex != lastIndex) { bytes32 lastValue = set._values[lastIndex]; // Move the lastValue to the index where the value to delete is set._values[valueIndex] = lastValue; // Update the tracked position of the lastValue (that was just moved) set._positions[lastValue] = position; } // Delete the slot where the moved value was stored set._values.pop(); // Delete the tracked position for the deleted slot delete set._positions[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._positions[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { return set._values[index]; } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function _values(Set storage set) private view returns (bytes32[] memory) { return set._values; } // Bytes32Set struct Bytes32Set { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _add(set._inner, value); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _remove(set._inner, value); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) { return _contains(set._inner, value); } /** * @dev Returns the number of values in the set. O(1). */ function length(Bytes32Set storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) { return _at(set._inner, index); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(Bytes32Set storage set) internal view returns (bytes32[] memory) { bytes32[] memory store = _values(set._inner); bytes32[] memory result; /// @solidity memory-safe-assembly assembly { result := store } return result; } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint160(uint256(_at(set._inner, index)))); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(AddressSet storage set) internal view returns (address[] memory) { bytes32[] memory store = _values(set._inner); address[] memory result; /// @solidity memory-safe-assembly assembly { result := store } return result; } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values in the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(UintSet storage set) internal view returns (uint256[] memory) { bytes32[] memory store = _values(set._inner); uint256[] memory result; /// @solidity memory-safe-assembly assembly { result := store } return result; } }
pragma solidity ^0.8.4; import "../introspection/IERC165.sol"; interface IEOARegistry is IERC165 { function isVerifiedEOA(address account) external view returns (bool); }
pragma solidity ^0.8.4; interface ITransferValidator { function applyCollectionTransferPolicy(address caller, address from, address to) external view; function validateTransfer(address caller, address from, address to) external view; function validateTransfer(address caller, address from, address to, uint256 tokenId) external view; function validateTransfer(address caller, address from, address to, uint256 tokenId, uint256 amount) external; function beforeAuthorizedTransfer(address operator, address token, uint256 tokenId) external; function afterAuthorizedTransfer(address token, uint256 tokenId) external; function beforeAuthorizedTransfer(address operator, address token) external; function afterAuthorizedTransfer(address token) external; function beforeAuthorizedTransfer(address token, uint256 tokenId) external; function beforeAuthorizedTransferWithAmount(address token, uint256 tokenId, uint256 amount) external; function afterAuthorizedTransferWithAmount(address token, uint256 tokenId) external; }
pragma solidity ^0.8.4; 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 have been allowed to move this token by either {approve} or * {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon * a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom(address from, address to, uint256 tokenId) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721 * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must * understand this adds an external call which potentially creates a reentrancy vulnerability. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom(address from, address to, uint256 tokenId) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the address zero. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool approved) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); }
pragma solidity ^0.8.4; /** * @dev Standard ERC721 Errors * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC721 tokens. */ interface IERC721Errors { /** * @dev Indicates that an address can't be an owner. For example, `address(0)` is a forbidden owner in EIP-20. * Used in balance queries. * @param owner Address of the current owner of a token. */ error ERC721InvalidOwner(address owner); /** * @dev Indicates a `tokenId` whose `owner` is the zero address. * @param tokenId Identifier number of a token. */ error ERC721NonexistentToken(uint256 tokenId); /** * @dev Indicates an error related to the ownership over a particular token. Used in transfers. * @param sender Address whose tokens are being transferred. * @param tokenId Identifier number of a token. * @param owner Address of the current owner of a token. */ error ERC721IncorrectOwner(address sender, uint256 tokenId, address owner); /** * @dev Indicates a failure with the token `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. */ error ERC721InvalidSender(address sender); /** * @dev Indicates a failure with the token `receiver`. Used in transfers. * @param receiver Address to which tokens are being transferred. */ error ERC721InvalidReceiver(address receiver); /** * @dev Indicates a failure with the `operator`’s approval. Used in transfers. * @param operator Address that may be allowed to operate on tokens without being their owner. * @param tokenId Identifier number of a token. */ error ERC721InsufficientApproval(address operator, uint256 tokenId); /** * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals. * @param approver Address initiating an approval operation. */ error ERC721InvalidApprover(address approver); /** * @dev Indicates a failure with the `operator` to be approved. Used in approvals. * @param operator Address that may be allowed to operate on tokens without being their owner. */ error ERC721InvalidOperator(address operator); }
pragma solidity ^0.8.4; /** * @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); }
pragma solidity ^0.8.4; 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); }
pragma solidity ^0.8.4; library StorageERC721 { bytes32 private constant DATA_STORAGE_SLOT = keccak256("storage.ERC721"); struct Data { string name; string symbol; mapping(uint256 => address) owners; mapping(address => uint256) balances; mapping(uint256 => address) tokenApprovals; mapping(bytes32 => bool) operatorApprovals; } function data() internal pure returns (Data storage ptr) { bytes32 slot = DATA_STORAGE_SLOT; assembly { ptr.slot := slot } } }
pragma solidity ^0.8.4; import "../math/Math.sol"; import "../math/SignedMath.sol"; /** * @dev String operations. */ library Strings { bytes16 private constant HEX_DIGITS = "0123456789abcdef"; uint8 private constant ADDRESS_LENGTH = 20; /** * @dev The `value` string doesn't fit in the specified `length`. */ error StringsInsufficientHexLength(uint256 value, uint256 length); /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { unchecked { uint256 length = Math.log10(value) + 1; string memory buffer = new string(length); uint256 ptr; /// @solidity memory-safe-assembly assembly { ptr := add(buffer, add(32, length)) } while (true) { ptr--; /// @solidity memory-safe-assembly assembly { mstore8(ptr, byte(mod(value, 10), HEX_DIGITS)) } value /= 10; if (value == 0) break; } return buffer; } } /** * @dev Converts a `int256` to its ASCII `string` decimal representation. */ function toStringSigned(int256 value) internal pure returns (string memory) { return string.concat(value < 0 ? "-" : "", toString(SignedMath.abs(value))); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { unchecked { return toHexString(value, Math.log256(value) + 1); } } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { uint256 localValue = value; bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = HEX_DIGITS[localValue & 0xf]; localValue >>= 4; } if (localValue != 0) { revert StringsInsufficientHexLength(value, length); } return string(buffer); } /** * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal * representation. */ function toHexString(address addr) internal pure returns (string memory) { return toHexString(uint256(uint160(addr)), ADDRESS_LENGTH); } /** * @dev Returns true if the two strings are equal. */ function equal(string memory a, string memory b) internal pure returns (bool) { return bytes(a).length == bytes(b).length && keccak256(bytes(a)) == keccak256(bytes(b)); } }
pragma solidity ^0.8.4; abstract contract TransferHooks { /*************************************************************************/ /* Transfers Without Amounts */ /*************************************************************************/ /// @dev Optional validation hook that fires before a mint function _validateMint(address caller, address to, uint256 tokenId, uint256 value) internal virtual {} /// @dev Optional validation hook that fires before a burn function _validateBurn(address caller, address from, uint256 tokenId, uint256 value) internal virtual {} /// @dev Optional validation hook that fires before a transfer function _validateTransfer(address caller, address from, address to, uint256 tokenId, uint256 value) internal virtual {} /*************************************************************************/ /* Transfers With Amounts */ /*************************************************************************/ /// @dev Optional validation hook that fires before a mint function _validateMint(address caller, address to, uint256 tokenId, uint256 amount, uint256 value) internal virtual {} /// @dev Optional validation hook that fires before a burn function _validateBurn(address caller, address from, uint256 tokenId, uint256 amount, uint256 value) internal virtual {} /// @dev Optional validation hook that fires before a transfer function _validateTransfer(address caller, address from, address to, uint256 tokenId, uint256 amount, uint256 value) internal virtual {} }
pragma solidity ^0.8.4; abstract contract OwnablePermissions { function _requireCallerIsContractOwner() internal view virtual; }
pragma solidity ^0.8.4; interface ICreatorToken { event TransferValidatorUpdated(address oldValidator, address newValidator); function getTransferValidator() external view returns (address validator); function setTransferValidator(address validator) external; function getTransferValidationFunction() external view returns (bytes4 functionSignature, bool isViewFunction); }
pragma solidity ^0.8.4; interface ICreatorTokenLegacy { event TransferValidatorUpdated(address oldValidator, address newValidator); function getTransferValidator() external view returns (address validator); function setTransferValidator(address validator) external; }
pragma solidity ^0.8.4; interface ITransferValidatorSetTokenType { function setTokenTypeOfCollection(address collection, uint16 tokenType) external; }
pragma solidity ^0.8.4; /** * @title TransferValidation * @author Limit Break, Inc. * @notice A mix-in that can be combined with ERC-721 contracts to provide more granular hooks. * Openzeppelin's ERC721 contract only provides hooks for before and after transfer. This allows * developers to validate or customize transfers within the context of a mint, a burn, or a transfer. */ abstract contract TransferValidation { /// @dev Thrown when the from and to address are both the zero address. error ShouldNotMintToBurnAddress(); /*************************************************************************/ /* Transfers Without Amounts */ /*************************************************************************/ /// @dev Inheriting contracts should call this function in the _beforeTokenTransfer function to get more granular hooks. function _validateBeforeTransfer(address from, address to, uint256 tokenId) internal virtual { bool fromZeroAddress = from == address(0); bool toZeroAddress = to == address(0); if(fromZeroAddress && toZeroAddress) { revert ShouldNotMintToBurnAddress(); } else if(fromZeroAddress) { _preValidateMint(msg.sender, to, tokenId, msg.value); } else if(toZeroAddress) { _preValidateBurn(msg.sender, from, tokenId, msg.value); } else { _preValidateTransfer(msg.sender, from, to, tokenId, msg.value); } } /// @dev Inheriting contracts should call this function in the _afterTokenTransfer function to get more granular hooks. function _validateAfterTransfer(address from, address to, uint256 tokenId) internal virtual { bool fromZeroAddress = from == address(0); bool toZeroAddress = to == address(0); if(fromZeroAddress && toZeroAddress) { revert ShouldNotMintToBurnAddress(); } else if(fromZeroAddress) { _postValidateMint(msg.sender, to, tokenId, msg.value); } else if(toZeroAddress) { _postValidateBurn(msg.sender, from, tokenId, msg.value); } else { _postValidateTransfer(msg.sender, from, to, tokenId, msg.value); } } /// @dev Optional validation hook that fires before a mint function _preValidateMint(address caller, address to, uint256 tokenId, uint256 value) internal virtual {} /// @dev Optional validation hook that fires after a mint function _postValidateMint(address caller, address to, uint256 tokenId, uint256 value) internal virtual {} /// @dev Optional validation hook that fires before a burn function _preValidateBurn(address caller, address from, uint256 tokenId, uint256 value) internal virtual {} /// @dev Optional validation hook that fires after a burn function _postValidateBurn(address caller, address from, uint256 tokenId, uint256 value) internal virtual {} /// @dev Optional validation hook that fires before a transfer function _preValidateTransfer(address caller, address from, address to, uint256 tokenId, uint256 value) internal virtual {} /// @dev Optional validation hook that fires after a transfer function _postValidateTransfer(address caller, address from, address to, uint256 tokenId, uint256 value) internal virtual {} /*************************************************************************/ /* Transfers With Amounts */ /*************************************************************************/ /// @dev Inheriting contracts should call this function in the _beforeTokenTransfer function to get more granular hooks. function _validateBeforeTransfer(address from, address to, uint256 tokenId, uint256 amount) internal virtual { bool fromZeroAddress = from == address(0); bool toZeroAddress = to == address(0); if(fromZeroAddress && toZeroAddress) { revert ShouldNotMintToBurnAddress(); } else if(fromZeroAddress) { _preValidateMint(msg.sender, to, tokenId, amount, msg.value); } else if(toZeroAddress) { _preValidateBurn(msg.sender, from, tokenId, amount, msg.value); } else { _preValidateTransfer(msg.sender, from, to, tokenId, amount, msg.value); } } /// @dev Inheriting contracts should call this function in the _afterTokenTransfer function to get more granular hooks. function _validateAfterTransfer(address from, address to, uint256 tokenId, uint256 amount) internal virtual { bool fromZeroAddress = from == address(0); bool toZeroAddress = to == address(0); if(fromZeroAddress && toZeroAddress) { revert ShouldNotMintToBurnAddress(); } else if(fromZeroAddress) { _postValidateMint(msg.sender, to, tokenId, amount, msg.value); } else if(toZeroAddress) { _postValidateBurn(msg.sender, from, tokenId, amount, msg.value); } else { _postValidateTransfer(msg.sender, from, to, tokenId, amount, msg.value); } } /// @dev Optional validation hook that fires before a mint function _preValidateMint(address caller, address to, uint256 tokenId, uint256 amount, uint256 value) internal virtual {} /// @dev Optional validation hook that fires after a mint function _postValidateMint(address caller, address to, uint256 tokenId, uint256 amount, uint256 value) internal virtual {} /// @dev Optional validation hook that fires before a burn function _preValidateBurn(address caller, address from, uint256 tokenId, uint256 amount, uint256 value) internal virtual {} /// @dev Optional validation hook that fires after a burn function _postValidateBurn(address caller, address from, uint256 tokenId, uint256 amount, uint256 value) internal virtual {} /// @dev Optional validation hook that fires before a transfer function _preValidateTransfer(address caller, address from, address to, uint256 tokenId, uint256 amount, uint256 value) internal virtual {} /// @dev Optional validation hook that fires after a transfer function _postValidateTransfer(address caller, address from, address to, uint256 tokenId, uint256 amount, uint256 value) internal virtual {} }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; /// @dev Thrown when a stored approval exceeds type(uint200).max error PermitC__AmountExceedsStorageMaximum(); /// @dev Thrown when a transfer amount requested exceeds the permitted amount error PermitC__ApprovalTransferExceededPermittedAmount(); /// @dev Thrown when a transfer is requested after the permit has expired error PermitC__ApprovalTransferPermitExpiredOrUnset(); /// @dev Thrown when attempting to close an order by an account that is not the owner or operator error PermitC__CallerMustBeOwnerOrOperator(); /// @dev Thrown when attempting to approve a token type that is not valid for PermitC error PermitC__InvalidTokenType(); /// @dev Thrown when attempting to invalidate a nonce that has already been used error PermitC__NonceAlreadyUsedOrRevoked(); /// @dev Thrown when attempting to restore a nonce that has not been used error PermitC__NonceNotUsedOrRevoked(); /// @dev Thrown when attempting to fill an order that has already been filled or cancelled error PermitC__OrderIsEitherCancelledOrFilled(); /// @dev Thrown when a transfer amount requested exceeds the permitted amount error PermitC__SignatureTransferExceededPermittedAmount(); /// @dev Thrown when a transfer is requested after the permit has expired error PermitC__SignatureTransferExceededPermitExpired(); /// @dev Thrown when attempting to use an advanced permit typehash that is not registered error PermitC__SignatureTransferPermitHashNotRegistered(); /// @dev Thrown when a permit signature is invalid error PermitC__SignatureTransferInvalidSignature(); /// @dev Thrown when the remaining fill amount is less than the requested minimum fill error PermitC__UnableToFillMinimumRequestedQuantity();
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (interfaces/IERC20.sol) pragma solidity ^0.8.0; import "../token/ERC20/IERC20.sol";
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (interfaces/IERC721.sol) pragma solidity ^0.8.0; import "../token/ERC721/IERC721.sol";
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (interfaces/IERC1155.sol) pragma solidity ^0.8.0; import "../token/ERC1155/IERC1155.sol";
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (interfaces/IERC1271.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC1271 standard signature validation method for * contracts as defined in https://eips.ethereum.org/EIPS/eip-1271[ERC-1271]. * * _Available since v4.1._ */ interface IERC1271 { /** * @dev Should return whether the signature provided is valid for the provided data * @param hash Hash of the data to be signed * @param signature Signature byte array associated with _data */ function isValidSignature(bytes32 hash, bytes memory signature) external view returns (bytes4 magicValue); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol) pragma solidity ^0.8.0; import {Context} from "@openzeppelin/contracts/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 { error Ownable__CallerIsNotOwner(); error Ownable__NewOwnerIsZeroAddress(); address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { if(owner() != _msgSender()) revert Ownable__CallerIsNotOwner(); } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby disabling any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { if(newOwner == address(0)) revert Ownable__NewOwnerIsZeroAddress(); _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 v4.9.0) (utils/cryptography/EIP712.sol) pragma solidity ^0.8.8; import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol"; /** * @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data. * * The encoding specified in the EIP is very generic, and such a generic implementation in Solidity is not feasible, * thus this contract does not implement the encoding itself. Protocols need to implement the type-specific encoding * they need in their contracts using a combination of `abi.encode` and `keccak256`. * * This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding * scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA * ({_hashTypedDataV4}). * * The implementation of the domain separator was designed to be as efficient as possible while still properly updating * the chain id to protect against replay attacks on an eventual fork of the chain. * * NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method * https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask]. * * NOTE: In the upgradeable version of this contract, the cached values will correspond to the address, and the domain * separator of the implementation contract. This will cause the `_domainSeparatorV4` function to always rebuild the * separator from the immutable values, which is cheaper than accessing a cached version in cold storage. * * _Available since v3.4._ * * @custom:oz-upgrades-unsafe-allow state-variable-immutable state-variable-assignment */ abstract contract EIP712 { bytes32 private constant _TYPE_HASH = keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"); // Cache the domain separator as an immutable value, but also store the chain id that it corresponds to, in order to // invalidate the cached domain separator if the chain id changes. bytes32 private immutable _cachedDomainSeparator; uint256 private immutable _cachedChainId; bytes32 private immutable _hashedName; bytes32 private immutable _hashedVersion; /** * @dev Initializes the domain separator and parameter caches. * * The meaning of `name` and `version` is specified in * https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]: * * - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol. * - `version`: the current major version of the signing domain. * * NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart * contract upgrade]. */ constructor(string memory name, string memory version) { _hashedName = keccak256(bytes(name)); _hashedVersion = keccak256(bytes(version)); _cachedChainId = block.chainid; _cachedDomainSeparator = _buildDomainSeparator(); } /** * @dev Returns the domain separator for the current chain. */ function _domainSeparatorV4() internal view returns (bytes32) { if (block.chainid == _cachedChainId) { return _cachedDomainSeparator; } else { return _buildDomainSeparator(); } } function _buildDomainSeparator() private view returns (bytes32) { return keccak256(abi.encode(_TYPE_HASH, _hashedName, _hashedVersion, block.chainid, address(this))); } /** * @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this * function returns the hash of the fully encoded EIP712 message for this domain. * * This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example: * * ```solidity * bytes32 digest = _hashTypedDataV4(keccak256(abi.encode( * keccak256("Mail(address to,string contents)"), * mailTo, * keccak256(bytes(mailContents)) * ))); * address signer = ECDSA.recover(digest, signature); * ``` */ function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) { return ECDSA.toTypedDataHash(_domainSeparatorV4(), structHash); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; /// @dev Constant bytes32 value of 0x000...000 bytes32 constant ZERO_BYTES32 = bytes32(0); /// @dev Constant value of 0 uint256 constant ZERO = 0; /// @dev Constant value of 1 uint256 constant ONE = 1; /// @dev Constant value representing an open order in storage uint8 constant ORDER_STATE_OPEN = 0; /// @dev Constant value representing a filled order in storage uint8 constant ORDER_STATE_FILLED = 1; /// @dev Constant value representing a cancelled order in storage uint8 constant ORDER_STATE_CANCELLED = 2; /// @dev Constant value representing the ERC721 token type for signatures and transfer hooks uint256 constant TOKEN_TYPE_ERC721 = 721; /// @dev Constant value representing the ERC1155 token type for signatures and transfer hooks uint256 constant TOKEN_TYPE_ERC1155 = 1155; /// @dev Constant value representing the ERC20 token type for signatures and transfer hooks uint256 constant TOKEN_TYPE_ERC20 = 20; /// @dev Constant value to mask the upper bits of a signature that uses a packed `vs` value to extract `s` bytes32 constant UPPER_BIT_MASK = 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff; /// @dev EIP-712 typehash used for validating signature based stored approvals bytes32 constant UPDATE_APPROVAL_TYPEHASH = keccak256("UpdateApprovalBySignature(uint256 tokenType,address token,uint256 id,uint256 amount,uint256 nonce,address operator,uint256 approvalExpiration,uint256 sigDeadline,uint256 masterNonce)"); /// @dev EIP-712 typehash used for validating a single use permit without additional data bytes32 constant SINGLE_USE_PERMIT_TYPEHASH = keccak256("PermitTransferFrom(uint256 tokenType,address token,uint256 id,uint256 amount,uint256 nonce,address operator,uint256 expiration,uint256 masterNonce)"); /// @dev EIP-712 typehash used for validating a single use permit with additional data string constant SINGLE_USE_PERMIT_TRANSFER_ADVANCED_TYPEHASH_STUB = "PermitTransferFromWithAdditionalData(uint256 tokenType,address token,uint256 id,uint256 amount,uint256 nonce,address operator,uint256 expiration,uint256 masterNonce,"; /// @dev EIP-712 typehash used for validating an order permit that updates storage as it fills string constant PERMIT_ORDER_ADVANCED_TYPEHASH_STUB = "PermitOrderWithAdditionalData(uint256 tokenType,address token,uint256 id,uint256 amount,uint256 salt,address operator,uint256 expiration,uint256 masterNonce,"; /// @dev Pausable flag for stored approval transfers of ERC721 assets uint256 constant PAUSABLE_APPROVAL_TRANSFER_FROM_ERC721 = 1 << 0; /// @dev Pausable flag for stored approval transfers of ERC1155 assets uint256 constant PAUSABLE_APPROVAL_TRANSFER_FROM_ERC1155 = 1 << 1; /// @dev Pausable flag for stored approval transfers of ERC20 assets uint256 constant PAUSABLE_APPROVAL_TRANSFER_FROM_ERC20 = 1 << 2; /// @dev Pausable flag for single use permit transfers of ERC721 assets uint256 constant PAUSABLE_PERMITTED_TRANSFER_FROM_ERC721 = 1 << 3; /// @dev Pausable flag for single use permit transfers of ERC1155 assets uint256 constant PAUSABLE_PERMITTED_TRANSFER_FROM_ERC1155 = 1 << 4; /// @dev Pausable flag for single use permit transfers of ERC20 assets uint256 constant PAUSABLE_PERMITTED_TRANSFER_FROM_ERC20 = 1 << 5; /// @dev Pausable flag for order fill transfers of ERC1155 assets uint256 constant PAUSABLE_ORDER_TRANSFER_FROM_ERC1155 = 1 << 6; /// @dev Pausable flag for order fill transfers of ERC20 assets uint256 constant PAUSABLE_ORDER_TRANSFER_FROM_ERC20 = 1 << 7;
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; /// @dev Storage data struct for stored approvals and order approvals struct PackedApproval { // Only used for partial fill position 1155 transfers uint8 state; // Amount allowed uint200 amount; // Permission expiry uint48 expiration; } /// @dev Calldata data struct for order fill amounts struct OrderFillAmounts { uint256 orderStartAmount; uint256 requestedFillAmount; uint256 minimumFillAmount; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.24; import {SINGLE_USE_PERMIT_TYPEHASH, UPDATE_APPROVAL_TYPEHASH} from "../Constants.sol"; library PermitHash { /** * @notice Hashes the permit data for a stored approval * * @param tokenType The type of token * @param token The address of the token * @param id The id of the token * @param amount The amount authorized by the owner signature * @param nonce The nonce for the permit * @param operator The account that is allowed to use the permit * @param approvalExpiration The time the permit approval expires * @param sigDeadline The deadline for submitting the permit onchain * @param masterNonce The signers master nonce * * @return hash The hash of the permit data */ function hashOnChainApproval( uint256 tokenType, address token, uint256 id, uint256 amount, uint256 nonce, address operator, uint256 approvalExpiration, uint256 sigDeadline, uint256 masterNonce ) internal pure returns (bytes32 hash) { hash = keccak256( abi.encode( UPDATE_APPROVAL_TYPEHASH, tokenType, token, id, amount, nonce, operator, approvalExpiration, sigDeadline, masterNonce ) ); } /** * @notice Hashes the permit data with the single user permit without additional data typehash * * @param tokenType The type of token * @param token The address of the token * @param id The id of the token * @param amount The amount authorized by the owner signature * @param nonce The nonce for the permit * @param expiration The time the permit expires * @param masterNonce The signers master nonce * * @return hash The hash of the permit data */ function hashSingleUsePermit( uint256 tokenType, address token, uint256 id, uint256 amount, uint256 nonce, uint256 expiration, uint256 masterNonce ) internal view returns (bytes32 hash) { hash = keccak256( abi.encode( SINGLE_USE_PERMIT_TYPEHASH, tokenType, token, id, amount, nonce, msg.sender, expiration, masterNonce ) ); } /** * @notice Hashes the permit data with the supplied typehash * * @param tokenType The type of token * @param token The address of the token * @param id The id of the token * @param amount The amount authorized by the owner signature * @param nonce The nonce for the permit * @param expiration The time the permit expires * @param additionalData The additional data to validate with the permit signature * @param additionalDataTypeHash The typehash of the permit to use for validating the signature * @param masterNonce The signers master nonce * * @return hash The hash of the permit data with the supplied typehash */ function hashSingleUsePermitWithAdditionalData( uint256 tokenType, address token, uint256 id, uint256 amount, uint256 nonce, uint256 expiration, bytes32 additionalData, bytes32 additionalDataTypeHash, uint256 masterNonce ) internal view returns (bytes32 hash) { hash = keccak256( abi.encode( additionalDataTypeHash, tokenType, token, id, amount, nonce, msg.sender, expiration, masterNonce, additionalData ) ); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; import {OrderFillAmounts} from "../DataTypes.sol"; interface IPermitC { /** * ================================================= * ==================== Events ===================== * ================================================= */ /// @dev Emitted when an approval is stored event Approval( address indexed owner, address indexed token, address indexed operator, uint256 id, uint200 amount, uint48 expiration ); /// @dev Emitted when a user increases their master nonce event Lockdown(address indexed owner); /// @dev Emitted when an order is opened event OrderOpened( bytes32 indexed orderId, address indexed owner, address indexed operator, uint256 fillableQuantity ); /// @dev Emitted when an order has a fill event OrderFilled( bytes32 indexed orderId, address indexed owner, address indexed operator, uint256 amount ); /// @dev Emitted when an order has been fully filled or cancelled event OrderClosed( bytes32 indexed orderId, address indexed owner, address indexed operator, bool wasCancellation); /// @dev Emitted when an order has an amount restored due to a failed transfer event OrderRestored( bytes32 indexed orderId, address indexed owner, uint256 amountRestoredToOrder ); /** * ================================================= * ============== Approval Transfers =============== * ================================================= */ function approve(uint256 tokenType, address token, uint256 id, address operator, uint200 amount, uint48 expiration) external; function updateApprovalBySignature( uint256 tokenType, address token, uint256 id, uint256 nonce, uint200 amount, address operator, uint48 approvalExpiration, uint48 sigDeadline, address owner, bytes calldata signedPermit ) external; function allowance( address owner, address operator, uint256 tokenType, address token, uint256 id ) external view returns (uint256 amount, uint256 expiration); /** * ================================================= * ================ Signed Transfers =============== * ================================================= */ function registerAdditionalDataHash(string memory additionalDataTypeString) external; function permitTransferFromERC721( address token, uint256 id, uint256 nonce, uint256 expiration, address owner, address to, bytes calldata signedPermit ) external returns (bool isError); function permitTransferFromWithAdditionalDataERC721( address token, uint256 id, uint256 nonce, uint256 expiration, address owner, address to, bytes32 additionalData, bytes32 advancedPermitHash, bytes calldata signedPermit ) external returns (bool isError); function permitTransferFromERC1155( address token, uint256 id, uint256 nonce, uint256 permitAmount, uint256 expiration, address owner, address to, uint256 transferAmount, bytes calldata signedPermit ) external returns (bool isError); function permitTransferFromWithAdditionalDataERC1155( address token, uint256 id, uint256 nonce, uint256 permitAmount, uint256 expiration, address owner, address to, uint256 transferAmount, bytes32 additionalData, bytes32 advancedPermitHash, bytes calldata signedPermit ) external returns (bool isError); function permitTransferFromERC20( address token, uint256 nonce, uint256 permitAmount, uint256 expiration, address owner, address to, uint256 transferAmount, bytes calldata signedPermit ) external returns (bool isError); function permitTransferFromWithAdditionalDataERC20( address token, uint256 nonce, uint256 permitAmount, uint256 expiration, address owner, address to, uint256 transferAmount, bytes32 additionalData, bytes32 advancedPermitHash, bytes calldata signedPermit ) external returns (bool isError); function isRegisteredTransferAdditionalDataHash(bytes32 hash) external view returns (bool isRegistered); function isRegisteredOrderAdditionalDataHash(bytes32 hash) external view returns (bool isRegistered); /** * ================================================= * =============== Order Transfers ================= * ================================================= */ function fillPermittedOrderERC1155( bytes calldata signedPermit, OrderFillAmounts calldata orderFillAmounts, address token, uint256 id, address owner, address to, uint256 nonce, uint48 expiration, bytes32 orderId, bytes32 advancedPermitHash ) external returns (uint256 quantityFilled, bool isError); function fillPermittedOrderERC20( bytes calldata signedPermit, OrderFillAmounts calldata orderFillAmounts, address token, address owner, address to, uint256 nonce, uint48 expiration, bytes32 orderId, bytes32 advancedPermitHash ) external returns (uint256 quantityFilled, bool isError); function closePermittedOrder( address owner, address operator, uint256 tokenType, address token, uint256 id, bytes32 orderId ) external; function allowance( address owner, address operator, uint256 tokenType, address token, uint256 id, bytes32 orderId ) external view returns (uint256 amount, uint256 expiration); /** * ================================================= * ================ Nonce Management =============== * ================================================= */ function invalidateUnorderedNonce(uint256 nonce) external; function isValidUnorderedNonce(address owner, uint256 nonce) external view returns (bool isValid); function lockdown() external; function masterNonce(address owner) external view returns (uint256); /** * ================================================= * ============== Transfer Functions =============== * ================================================= */ function transferFromERC721( address from, address to, address token, uint256 id ) external returns (bool isError); function transferFromERC1155( address from, address to, address token, uint256 id, uint256 amount ) external returns (bool isError); function transferFromERC20( address from, address to, address token, uint256 amount ) external returns (bool isError); /** * ================================================= * ============ Signature Verification ============= * ================================================= */ function domainSeparatorV4() external view returns (bytes32); }
//SPDX-License-Identifier: MIT pragma solidity ^0.8.24; /* @@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@( @@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@ #@@@@@@@@@@@@@@ @@@@@@@@@@@@ @@@@@@@@@@@@@@* @@@@@@@@@@@@ @@@@@@@@@@@@@@@ @ @@@@@@@@@@@@ @@@@@@@@@@@@@@@ @ @@@@@@@@@@@ @@@@@@@@@@@@@@@ @@ @@@@@@@@@@@@ @@@@@@@@@@@@@@@ #@@ @@@@@@@@@@@@/ @@@@@@@@@@@@@@. @@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@ @@@@@&%%%%%%%%&&@@@@@@@@@@@@@@ @@@@@@@@@@@@@@ @@@@@ @@@@@@@@@@@ @@@@@@@@@@@@@@@ @@@@@ @@@@@@@@@@@ @@@@@@@@@@@@@@@ @@@@@@ @@@@@@@@@@@ @@@@@@@@@@@@@@@ @@@@@@@ @@@@@@@@@@@ @@@@@@@@@@@@@@@ @@@@@@@ @@@@@@@@@@@& @@@@@@@@@@@@@@ *@@@@@@@ (@@@@@@@@@@@@ @@@@@@@@@@@@@@@ @@@@@@@@ @@@@@@@@@@@@@@ @@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ .@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@% @@@@@@@@@@@@@@@@@@@@@@@@( @@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@& @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ * @title CollateralizedPausableFlags * @custom:version 1.0.0 * @author Limit Break, Inc. * @description Collateralized Pausable Flags is an extension for contracts * that require features to be pausable in the event of potential * or actual threats without incurring a storage read overhead cost * during normal operations by using contract starting balance as * a signal for checking the paused state. * * Using contract balance to enable checking paused state creates an * economic penalty for developers that deploy code that can be * exploited as well as an economic incentive (recovery of collateral) * for them to mitigate the threat. * * Developers implementing Collateralized Pausable Flags should consider * their risk mitigation strategy and ensure funds are readily available * for pausing if ever necessary by setting an appropriate threshold * value and considering use of an escrow contract that can initiate the * pause with funds. * * There is no restriction on the depositor as this can be easily * circumvented through a `SELFDESTRUCT` opcode. * * Developers must be aware of potential outflows from the contract that * could reduce collateral below the pausable check threshold and protect * against those methods when pausing is required. */ abstract contract CollateralizedPausableFlags { /// @dev Emitted when the pausable flags are updated event PausableFlagsUpdated(uint256 previousFlags, uint256 newFlags); /// @dev Thrown when an execution path requires a flag to not be paused but it is paused error CollateralizedPausableFlags__Paused(); /// @dev Thrown when an executin path requires a flag to be paused but it is not paused error CollateralizedPausableFlags__NotPaused(); /// @dev Thrown when a call to withdraw funds fails error CollateralizedPausableFlags__WithdrawFailed(); /// @dev Immutable variable that defines the native funds threshold before flags are checked uint256 private immutable nativeValueToCheckPauseState; /// @dev Flags for current pausable state, each bit is considered a separate flag uint256 private pausableFlags; /// @dev Immutable pointer for the _requireNotPaused function to use based on value threshold function(uint256) internal view immutable _requireNotPaused; /// @dev Immutable pointer for the _requirePaused function to use based on value threshold function(uint256) internal view immutable _requirePaused; /// @dev Immutable pointer for the _getPausableFlags function to use based on value threshold function() internal view returns (uint256) immutable _getPausableFlags; constructor(uint256 _nativeValueToCheckPauseState) { // Optimizes value check at runtime by reducing the stored immutable // value by 1 so that greater than can be used instead of greater // than or equal while allowing the deployment parameter to reflect // the value at which the deployer wants to trigger pause checking. // Example: // Constructed with a value of 1000 // Immutable value stored is 999 // State checking enabled at 1000 units deposited because // 1000 > 999 evaluates true if (_nativeValueToCheckPauseState > 0) { unchecked { _nativeValueToCheckPauseState -= 1; } _requireNotPaused = _requireNotPausedWithCollateralCheck; _requirePaused = _requirePausedWithCollateralCheck; _getPausableFlags = _getPausableFlagsWithCollateralCheck; } else { _requireNotPaused = _requireNotPausedWithoutCollateralCheck; _requirePaused = _requirePausedWithoutCollateralCheck; _getPausableFlags = _getPausableFlagsWithoutCollateralCheck; } nativeValueToCheckPauseState = _nativeValueToCheckPauseState; } /** * @dev Modifier to make a function callable only when the specified flags are not paused * @dev Throws when any of the flags specified are paused * * @param _flags The flags to check for pause state */ modifier whenNotPaused(uint256 _flags) { _requireNotPaused(_flags); _; } /** * @dev Modifier to make a function callable only when the specified flags are paused * @dev Throws when any of the flags specified are not paused * * @param _flags The flags to check for pause state */ modifier whenPaused(uint256 _flags) { _requirePaused(_flags); _; } /** * @dev Modifier to make a function callable only by a permissioned account * @dev Throws when the caller does not have permission */ modifier onlyPausePermissionedCaller() { _requireCallerHasPausePermissions(); _; } /** * @notice Updates the pausable flags settings * * @dev Throws when the caller does not have permission * @dev **NOTE:** Pausable flag settings will only take effect if contract balance exceeds * @dev `nativeValueToPause` * * @dev <h4>Postconditions:</h4> * @dev 1. address(this).balance increases by msg.value * @dev 2. `pausableFlags` is set to the new value * @dev 3. Emits a PausableFlagsUpdated event * * @param _pausableFlags The new pausable flags to set */ function pause(uint256 _pausableFlags) external payable onlyPausePermissionedCaller { _setPausableFlags(_pausableFlags); } /** * @notice Allows any account to supply funds for enabling the pausable checks * * @dev **NOTE:** The threshold check for pausable collateral does not pause * @dev any functions unless the associated pausable flag is set. */ function pausableDepositCollateral() external payable { // thank you for your contribution to safety } /** * @notice Resets all pausable flags to unpaused and withdraws funds * * @dev Throws when the caller does not have permission * * @dev <h4>Postconditions:</h4> * @dev 1. `pausableFlags` is set to zero * @dev 2. Emits a PausableFlagsUpdated event * @dev 3. Transfers `withdrawAmount` of native funds to `withdrawTo` if non-zero * * @param withdrawTo The address to withdraw the collateral to * @param withdrawAmount The amount of collateral to withdraw */ function unpause(address withdrawTo, uint256 withdrawAmount) external onlyPausePermissionedCaller { _setPausableFlags(0); if (withdrawAmount > 0) { (bool success, ) = withdrawTo.call{value: withdrawAmount}(""); if(!success) revert CollateralizedPausableFlags__WithdrawFailed(); } } /** * @notice Returns collateralized pausable configuration information * * @return _nativeValueToCheckPauseState The collateral required to enable pause state checking * @return _pausableFlags The current pausable flags set, only checked when collateral met */ function pausableConfigurationSettings() external view returns( uint256 _nativeValueToCheckPauseState, uint256 _pausableFlags ) { unchecked { _nativeValueToCheckPauseState = nativeValueToCheckPauseState + 1; _pausableFlags = pausableFlags; } } /** * @notice Updates the `pausableFlags` variable and emits a PausableFlagsUpdated event * * @param _pausableFlags The new pausable flags to set */ function _setPausableFlags(uint256 _pausableFlags) internal { uint256 previousFlags = pausableFlags; pausableFlags = _pausableFlags; emit PausableFlagsUpdated(previousFlags, _pausableFlags); } /** * @notice Checks the current pause state of the supplied flags and reverts if any are paused * * @dev *Should* be called prior to any transfers of native funds out of the contract for efficiency * @dev Throws when the native funds balance is greater than the value to enable pausing AND * @dev one or more of the supplied `_flags` is paused. * * @param _flags The flags to check for pause state */ function _requireNotPausedWithCollateralCheck(uint256 _flags) private view { if (_nativeBalanceSubMsgValue() > nativeValueToCheckPauseState) { if (pausableFlags & _flags > 0) { revert CollateralizedPausableFlags__Paused(); } } } /** * @notice Checks the current pause state of the supplied flags and reverts if any are paused * * @dev Throws when one or more of the supplied `_flags` is paused. * * @param _flags The flags to check for pause state */ function _requireNotPausedWithoutCollateralCheck(uint256 _flags) private view { if (pausableFlags & _flags > 0) { revert CollateralizedPausableFlags__Paused(); } } /** * @notice Checks the current pause state of the supplied flags and reverts if none are paused * * @dev *Should* be called prior to any transfers of native funds out of the contract for efficiency * @dev Throws when the native funds balance is not greater than the value to enable pausing OR * @dev none of the supplied `_flags` are paused. * * @param _flags The flags to check for pause state */ function _requirePausedWithCollateralCheck(uint256 _flags) private view { if (_nativeBalanceSubMsgValue() <= nativeValueToCheckPauseState) { revert CollateralizedPausableFlags__NotPaused(); } else if (pausableFlags & _flags == 0) { revert CollateralizedPausableFlags__NotPaused(); } } /** * @notice Checks the current pause state of the supplied flags and reverts if none are paused * * @dev Throws when none of the supplied `_flags` are paused. * * @param _flags The flags to check for pause state */ function _requirePausedWithoutCollateralCheck(uint256 _flags) private view { if (pausableFlags & _flags == 0) { revert CollateralizedPausableFlags__NotPaused(); } } /** * @notice Returns the current state of the pausable flags * * @dev Will return zero if the native funds balance is not greater than the value to enable pausing * * @return _pausableFlags The current state of the pausable flags */ function _getPausableFlagsWithCollateralCheck() private view returns(uint256 _pausableFlags) { if (_nativeBalanceSubMsgValue() > nativeValueToCheckPauseState) { _pausableFlags = pausableFlags; } } /** * @notice Returns the current state of the pausable flags * * @return _pausableFlags The current state of the pausable flags */ function _getPausableFlagsWithoutCollateralCheck() private view returns(uint256 _pausableFlags) { _pausableFlags = pausableFlags; } /** * @notice Returns the current contract balance minus the value sent with the call * * @dev This is expected to be the contract balance at the beginning of a function call * @dev to efficiently determine whether a contract has the necessary collateral to enable * @dev the pausable flags checking for contracts that hold native token funds. * @dev This should **NOT** be used in any way to determine current balance for contract logic * @dev other than its intended purpose for pause state checking activation. */ function _nativeBalanceSubMsgValue() private view returns (uint256 _value) { unchecked { _value = address(this).balance - msg.value; } } /** * @dev To be implemented by an inheriting contract for authorization to `pause` and `unpause` * @dev functions as well as any functions in the inheriting contract that utilize the * @dev `onlyPausePermissionedCaller` modifier. * * @dev Implementing contract function **MUST** throw when the caller is not permissioned */ function _requireCallerHasPausePermissions() internal view virtual; }
pragma solidity ^0.8.4; /** * @dev Interface of the ERC-165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[ERC]. * * 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[ERC section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
pragma solidity ^0.8.4; /** * @dev Standard math utilities missing in the Solidity language. */ library Math { /** * @dev Muldiv operation overflow. */ error MathOverflowedMulDiv(); enum Rounding { Floor, // Toward negative infinity Ceil, // Toward positive infinity Trunc, // Toward zero Expand // Away from zero } /** * @dev Returns the addition of two unsigned integers, with an overflow flag. */ function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { uint256 c = a + b; if (c < a) return (false, 0); return (true, c); } } /** * @dev Returns the subtraction of two unsigned integers, with an overflow flag. */ function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b > a) return (false, 0); return (true, a - b); } } /** * @dev Returns the multiplication of two unsigned integers, with an overflow flag. */ function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) return (true, 0); uint256 c = a * b; if (c / a != b) return (false, 0); return (true, c); } } /** * @dev Returns the division of two unsigned integers, with a division by zero flag. */ function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a / b); } } /** * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag. */ function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a % b); } } /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a > b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow. return (a & b) + (a ^ b) / 2; } /** * @dev Returns the ceiling of the division of two numbers. * * This differs from standard division with `/` in that it rounds towards infinity instead * of rounding towards zero. */ function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) { if (b == 0) { // Guarantee the same behavior as in a regular Solidity division. return a / b; } // (a + b - 1) / b can overflow on addition, so we distribute. return a == 0 ? 0 : (a - 1) / b + 1; } /** * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or * denominator == 0. * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) with further edits by * Uniswap Labs also under MIT license. */ function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) { unchecked { // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256 // variables such that product = prod1 * 2^256 + prod0. uint256 prod0 = x * y; // Least significant 256 bits of the product uint256 prod1; // Most significant 256 bits of the product assembly { let mm := mulmod(x, y, not(0)) prod1 := sub(sub(mm, prod0), lt(mm, prod0)) } // Handle non-overflow cases, 256 by 256 division. if (prod1 == 0) { // Solidity will revert if denominator == 0, unlike the div opcode on its own. // The surrounding unchecked block does not change this fact. // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic. return prod0 / denominator; } // Make sure the result is less than 2^256. Also prevents denominator == 0. if (denominator <= prod1) { revert MathOverflowedMulDiv(); } /////////////////////////////////////////////// // 512 by 256 division. /////////////////////////////////////////////// // Make division exact by subtracting the remainder from [prod1 prod0]. uint256 remainder; assembly { // Compute remainder using mulmod. remainder := mulmod(x, y, denominator) // Subtract 256 bit number from 512 bit number. prod1 := sub(prod1, gt(remainder, prod0)) prod0 := sub(prod0, remainder) } // Factor powers of two out of denominator and compute largest power of two divisor of denominator. // Always >= 1. See https://cs.stackexchange.com/q/138556/92363. uint256 twos = denominator & (0 - denominator); assembly { // Divide denominator by twos. denominator := div(denominator, twos) // Divide [prod1 prod0] by twos. prod0 := div(prod0, twos) // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one. twos := add(div(sub(0, twos), twos), 1) } // Shift in bits from prod1 into prod0. prod0 |= prod1 * twos; // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for // four bits. That is, denominator * inv = 1 mod 2^4. uint256 inverse = (3 * denominator) ^ 2; // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also // works in modular arithmetic, doubling the correct bits in each step. inverse *= 2 - denominator * inverse; // inverse mod 2^8 inverse *= 2 - denominator * inverse; // inverse mod 2^16 inverse *= 2 - denominator * inverse; // inverse mod 2^32 inverse *= 2 - denominator * inverse; // inverse mod 2^64 inverse *= 2 - denominator * inverse; // inverse mod 2^128 inverse *= 2 - denominator * inverse; // inverse mod 2^256 // Because the division is now exact we can divide by multiplying with the modular inverse of denominator. // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1 // is no longer required. result = prod0 * inverse; return result; } } /** * @notice Calculates x * y / denominator with full precision, following the selected rounding direction. */ function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) { uint256 result = mulDiv(x, y, denominator); if (unsignedRoundsUp(rounding) && mulmod(x, y, denominator) > 0) { result += 1; } return result; } /** * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded * towards zero. * * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11). */ function sqrt(uint256 a) internal pure returns (uint256) { if (a == 0) { return 0; } // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target. // // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`. // // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)` // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))` // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)` // // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit. uint256 result = 1 << (log2(a) >> 1); // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128, // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision // into the expected uint128 result. unchecked { result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; return min(result, a / result); } } /** * @notice Calculates sqrt(a), following the selected rounding direction. */ function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = sqrt(a); return result + (unsignedRoundsUp(rounding) && result * result < a ? 1 : 0); } } /** * @dev Return the log in base 2 of a positive value rounded towards zero. * Returns 0 if given 0. */ function log2(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 128; } if (value >> 64 > 0) { value >>= 64; result += 64; } if (value >> 32 > 0) { value >>= 32; result += 32; } if (value >> 16 > 0) { value >>= 16; result += 16; } if (value >> 8 > 0) { value >>= 8; result += 8; } if (value >> 4 > 0) { value >>= 4; result += 4; } if (value >> 2 > 0) { value >>= 2; result += 2; } if (value >> 1 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 2, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log2(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log2(value); return result + (unsignedRoundsUp(rounding) && 1 << result < value ? 1 : 0); } } /** * @dev Return the log in base 10 of a positive value rounded towards zero. * Returns 0 if given 0. */ function log10(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >= 10 ** 64) { value /= 10 ** 64; result += 64; } if (value >= 10 ** 32) { value /= 10 ** 32; result += 32; } if (value >= 10 ** 16) { value /= 10 ** 16; result += 16; } if (value >= 10 ** 8) { value /= 10 ** 8; result += 8; } if (value >= 10 ** 4) { value /= 10 ** 4; result += 4; } if (value >= 10 ** 2) { value /= 10 ** 2; result += 2; } if (value >= 10 ** 1) { result += 1; } } return result; } /** * @dev Return the log in base 10, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log10(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log10(value); return result + (unsignedRoundsUp(rounding) && 10 ** result < value ? 1 : 0); } } /** * @dev Return the log in base 256 of a positive value rounded towards zero. * Returns 0 if given 0. * * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string. */ function log256(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 16; } if (value >> 64 > 0) { value >>= 64; result += 8; } if (value >> 32 > 0) { value >>= 32; result += 4; } if (value >> 16 > 0) { value >>= 16; result += 2; } if (value >> 8 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 256, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log256(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log256(value); return result + (unsignedRoundsUp(rounding) && 1 << (result << 3) < value ? 1 : 0); } } /** * @dev Returns whether a provided rounding mode is considered rounding up for unsigned integers. */ function unsignedRoundsUp(Rounding rounding) internal pure returns (bool) { return uint8(rounding) % 2 == 1; } }
pragma solidity ^0.8.4; /** * @dev Standard signed math utilities missing in the Solidity language. */ library SignedMath { /** * @dev Returns the largest of two signed numbers. */ function max(int256 a, int256 b) internal pure returns (int256) { return a > b ? a : b; } /** * @dev Returns the smallest of two signed numbers. */ function min(int256 a, int256 b) internal pure returns (int256) { return a < b ? a : b; } /** * @dev Returns the average of two signed numbers without overflow. * The result is rounded towards zero. */ function average(int256 a, int256 b) internal pure returns (int256) { // Formula from the book "Hacker's Delight" int256 x = (a & b) + ((a ^ b) >> 1); return x + (int256(uint256(x) >> 255) & (a ^ b)); } /** * @dev Returns the absolute unsigned value of a signed value. */ function abs(int256 n) internal pure returns (uint256) { unchecked { // must be unchecked in order to support `n = type(int256).min` return uint256(n >= 0 ? n : -n); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (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 v4.9.0) (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 have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom(address from, address to, uint256 tokenId) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721 * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must * understand this adds an external call which potentially creates a reentrancy vulnerability. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom(address from, address to, uint256 tokenId) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool approved) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC1155/IERC1155.sol) pragma solidity ^0.8.0; import "../../utils/introspection/IERC165.sol"; /** * @dev Required interface of an ERC1155 compliant contract, as defined in the * https://eips.ethereum.org/EIPS/eip-1155[EIP]. * * _Available since v3.1._ */ interface IERC1155 is IERC165 { /** * @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`. */ event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value); /** * @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all * transfers. */ event TransferBatch( address indexed operator, address indexed from, address indexed to, uint256[] ids, uint256[] values ); /** * @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to * `approved`. */ event ApprovalForAll(address indexed account, address indexed operator, bool approved); /** * @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI. * * If an {URI} event was emitted for `id`, the standard * https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value * returned by {IERC1155MetadataURI-uri}. */ event URI(string value, uint256 indexed id); /** * @dev Returns the amount of tokens of token type `id` owned by `account`. * * Requirements: * * - `account` cannot be the zero address. */ function balanceOf(address account, uint256 id) external view returns (uint256); /** * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}. * * Requirements: * * - `accounts` and `ids` must have the same length. */ function balanceOfBatch( address[] calldata accounts, uint256[] calldata ids ) external view returns (uint256[] memory); /** * @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`, * * Emits an {ApprovalForAll} event. * * Requirements: * * - `operator` cannot be the caller. */ function setApprovalForAll(address operator, bool approved) external; /** * @dev Returns true if `operator` is approved to transfer ``account``'s tokens. * * See {setApprovalForAll}. */ function isApprovedForAll(address account, address operator) external view returns (bool); /** * @dev Transfers `amount` tokens of token type `id` from `from` to `to`. * * Emits a {TransferSingle} event. * * Requirements: * * - `to` cannot be the zero address. * - If the caller is not `from`, it must have been approved to spend ``from``'s tokens via {setApprovalForAll}. * - `from` must have a balance of tokens of type `id` of at least `amount`. * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the * acceptance magic value. */ function safeTransferFrom(address from, address to, uint256 id, uint256 amount, bytes calldata data) external; /** * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}. * * Emits a {TransferBatch} event. * * Requirements: * * - `ids` and `amounts` must have the same length. * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the * acceptance magic value. */ function safeBatchTransferFrom( address from, address to, uint256[] calldata ids, uint256[] calldata amounts, bytes calldata data ) external; }
// 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 (last updated v4.9.0) (utils/cryptography/ECDSA.sol) pragma solidity ^0.8.0; import "../Strings.sol"; /** * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations. * * These functions can be used to verify that a message was signed by the holder * of the private keys of a given address. */ library ECDSA { enum RecoverError { NoError, InvalidSignature, InvalidSignatureLength, InvalidSignatureS, InvalidSignatureV // Deprecated in v4.8 } function _throwError(RecoverError error) private pure { if (error == RecoverError.NoError) { return; // no error: do nothing } else if (error == RecoverError.InvalidSignature) { revert("ECDSA: invalid signature"); } else if (error == RecoverError.InvalidSignatureLength) { revert("ECDSA: invalid signature length"); } else if (error == RecoverError.InvalidSignatureS) { revert("ECDSA: invalid signature 's' value"); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature` or error string. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. * * Documentation for signature generation: * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js] * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers] * * _Available since v4.3._ */ function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) { if (signature.length == 65) { bytes32 r; bytes32 s; uint8 v; // ecrecover takes the signature parameters, and the only way to get them // currently is to use assembly. /// @solidity memory-safe-assembly assembly { r := mload(add(signature, 0x20)) s := mload(add(signature, 0x40)) v := byte(0, mload(add(signature, 0x60))) } return tryRecover(hash, v, r, s); } else { return (address(0), RecoverError.InvalidSignatureLength); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature`. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. */ function recover(bytes32 hash, bytes memory signature) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, signature); _throwError(error); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately. * * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures] * * _Available since v4.3._ */ function tryRecover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address, RecoverError) { bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff); uint8 v = uint8((uint256(vs) >> 255) + 27); return tryRecover(hash, v, r, s); } /** * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately. * * _Available since v4.2._ */ function recover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, r, vs); _throwError(error); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `v`, * `r` and `s` signature fields separately. * * _Available since v4.3._ */ function tryRecover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address, RecoverError) { // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most // signatures from current libraries generate a unique signature with an s-value in the lower half order. // // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept // these malleable signatures as well. if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) { return (address(0), RecoverError.InvalidSignatureS); } // If the signature is valid (and not malleable), return the signer address address signer = ecrecover(hash, v, r, s); if (signer == address(0)) { return (address(0), RecoverError.InvalidSignature); } return (signer, RecoverError.NoError); } /** * @dev Overload of {ECDSA-recover} that receives the `v`, * `r` and `s` signature fields separately. */ function recover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, v, r, s); _throwError(error); return recovered; } /** * @dev Returns an Ethereum Signed Message, created from a `hash`. This * produces hash corresponding to the one signed with the * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] * JSON-RPC method as part of EIP-191. * * See {recover}. */ function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32 message) { // 32 is the length in bytes of hash, // enforced by the type signature above /// @solidity memory-safe-assembly assembly { mstore(0x00, "\x19Ethereum Signed Message:\n32") mstore(0x1c, hash) message := keccak256(0x00, 0x3c) } } /** * @dev Returns an Ethereum Signed Message, created from `s`. This * produces hash corresponding to the one signed with the * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] * JSON-RPC method as part of EIP-191. * * See {recover}. */ function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) { return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s)); } /** * @dev Returns an Ethereum Signed Typed Data, created from a * `domainSeparator` and a `structHash`. This produces hash corresponding * to the one signed with the * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`] * JSON-RPC method as part of EIP-712. * * See {recover}. */ function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32 data) { /// @solidity memory-safe-assembly assembly { let ptr := mload(0x40) mstore(ptr, "\x19\x01") mstore(add(ptr, 0x02), domainSeparator) mstore(add(ptr, 0x22), structHash) data := keccak256(ptr, 0x42) } } /** * @dev Returns an Ethereum Signed Data with intended validator, created from a * `validator` and `data` according to the version 0 of EIP-191. * * See {recover}. */ function toDataWithIntendedValidatorHash(address validator, bytes memory data) internal pure returns (bytes32) { return keccak256(abi.encodePacked("\x19\x00", validator, data)); } }
// 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 v4.9.0) (utils/Strings.sol) pragma solidity ^0.8.0; import "./math/Math.sol"; import "./math/SignedMath.sol"; /** * @dev String operations. */ library Strings { bytes16 private constant _SYMBOLS = "0123456789abcdef"; uint8 private constant _ADDRESS_LENGTH = 20; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { unchecked { uint256 length = Math.log10(value) + 1; string memory buffer = new string(length); uint256 ptr; /// @solidity memory-safe-assembly assembly { ptr := add(buffer, add(32, length)) } while (true) { ptr--; /// @solidity memory-safe-assembly assembly { mstore8(ptr, byte(mod(value, 10), _SYMBOLS)) } value /= 10; if (value == 0) break; } return buffer; } } /** * @dev Converts a `int256` to its ASCII `string` decimal representation. */ function toString(int256 value) internal pure returns (string memory) { return string(abi.encodePacked(value < 0 ? "-" : "", toString(SignedMath.abs(value)))); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { unchecked { return toHexString(value, Math.log256(value) + 1); } } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } /** * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation. */ function toHexString(address addr) internal pure returns (string memory) { return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH); } /** * @dev Returns true if the two strings are equal. */ function equal(string memory a, string memory b) internal pure returns (bool) { return keccak256(bytes(a)) == keccak256(bytes(b)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/math/Math.sol) pragma solidity ^0.8.0; /** * @dev Standard math utilities missing in the Solidity language. */ library Math { enum Rounding { Down, // Toward negative infinity Up, // Toward infinity Zero // Toward zero } /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a > b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow. return (a & b) + (a ^ b) / 2; } /** * @dev Returns the ceiling of the division of two numbers. * * This differs from standard division with `/` in that it rounds up instead * of rounding down. */ function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b - 1) / b can overflow on addition, so we distribute. return a == 0 ? 0 : (a - 1) / b + 1; } /** * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0 * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) * with further edits by Uniswap Labs also under MIT license. */ function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) { unchecked { // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256 // variables such that product = prod1 * 2^256 + prod0. uint256 prod0; // Least significant 256 bits of the product uint256 prod1; // Most significant 256 bits of the product assembly { let mm := mulmod(x, y, not(0)) prod0 := mul(x, y) prod1 := sub(sub(mm, prod0), lt(mm, prod0)) } // Handle non-overflow cases, 256 by 256 division. if (prod1 == 0) { // Solidity will revert if denominator == 0, unlike the div opcode on its own. // The surrounding unchecked block does not change this fact. // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic. return prod0 / denominator; } // Make sure the result is less than 2^256. Also prevents denominator == 0. require(denominator > prod1, "Math: mulDiv overflow"); /////////////////////////////////////////////// // 512 by 256 division. /////////////////////////////////////////////// // Make division exact by subtracting the remainder from [prod1 prod0]. uint256 remainder; assembly { // Compute remainder using mulmod. remainder := mulmod(x, y, denominator) // Subtract 256 bit number from 512 bit number. prod1 := sub(prod1, gt(remainder, prod0)) prod0 := sub(prod0, remainder) } // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1. // See https://cs.stackexchange.com/q/138556/92363. // Does not overflow because the denominator cannot be zero at this stage in the function. uint256 twos = denominator & (~denominator + 1); assembly { // Divide denominator by twos. denominator := div(denominator, twos) // Divide [prod1 prod0] by twos. prod0 := div(prod0, twos) // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one. twos := add(div(sub(0, twos), twos), 1) } // Shift in bits from prod1 into prod0. prod0 |= prod1 * twos; // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for // four bits. That is, denominator * inv = 1 mod 2^4. uint256 inverse = (3 * denominator) ^ 2; // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works // in modular arithmetic, doubling the correct bits in each step. inverse *= 2 - denominator * inverse; // inverse mod 2^8 inverse *= 2 - denominator * inverse; // inverse mod 2^16 inverse *= 2 - denominator * inverse; // inverse mod 2^32 inverse *= 2 - denominator * inverse; // inverse mod 2^64 inverse *= 2 - denominator * inverse; // inverse mod 2^128 inverse *= 2 - denominator * inverse; // inverse mod 2^256 // Because the division is now exact we can divide by multiplying with the modular inverse of denominator. // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1 // is no longer required. result = prod0 * inverse; return result; } } /** * @notice Calculates x * y / denominator with full precision, following the selected rounding direction. */ function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) { uint256 result = mulDiv(x, y, denominator); if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) { result += 1; } return result; } /** * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down. * * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11). */ function sqrt(uint256 a) internal pure returns (uint256) { if (a == 0) { return 0; } // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target. // // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`. // // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)` // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))` // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)` // // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit. uint256 result = 1 << (log2(a) >> 1); // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128, // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision // into the expected uint128 result. unchecked { result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; return min(result, a / result); } } /** * @notice Calculates sqrt(a), following the selected rounding direction. */ function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = sqrt(a); return result + (rounding == Rounding.Up && result * result < a ? 1 : 0); } } /** * @dev Return the log in base 2, rounded down, of a positive value. * Returns 0 if given 0. */ function log2(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 128; } if (value >> 64 > 0) { value >>= 64; result += 64; } if (value >> 32 > 0) { value >>= 32; result += 32; } if (value >> 16 > 0) { value >>= 16; result += 16; } if (value >> 8 > 0) { value >>= 8; result += 8; } if (value >> 4 > 0) { value >>= 4; result += 4; } if (value >> 2 > 0) { value >>= 2; result += 2; } if (value >> 1 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 2, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log2(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log2(value); return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0); } } /** * @dev Return the log in base 10, rounded down, of a positive value. * Returns 0 if given 0. */ function log10(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >= 10 ** 64) { value /= 10 ** 64; result += 64; } if (value >= 10 ** 32) { value /= 10 ** 32; result += 32; } if (value >= 10 ** 16) { value /= 10 ** 16; result += 16; } if (value >= 10 ** 8) { value /= 10 ** 8; result += 8; } if (value >= 10 ** 4) { value /= 10 ** 4; result += 4; } if (value >= 10 ** 2) { value /= 10 ** 2; result += 2; } if (value >= 10 ** 1) { result += 1; } } return result; } /** * @dev Return the log in base 10, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log10(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log10(value); return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0); } } /** * @dev Return the log in base 256, rounded down, of a positive value. * Returns 0 if given 0. * * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string. */ function log256(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 16; } if (value >> 64 > 0) { value >>= 64; result += 8; } if (value >> 32 > 0) { value >>= 32; result += 4; } if (value >> 16 > 0) { value >>= 16; result += 2; } if (value >> 8 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 256, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log256(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log256(value); return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SignedMath.sol) pragma solidity ^0.8.0; /** * @dev Standard signed math utilities missing in the Solidity language. */ library SignedMath { /** * @dev Returns the largest of two signed numbers. */ function max(int256 a, int256 b) internal pure returns (int256) { return a > b ? a : b; } /** * @dev Returns the smallest of two signed numbers. */ function min(int256 a, int256 b) internal pure returns (int256) { return a < b ? a : b; } /** * @dev Returns the average of two signed numbers without overflow. * The result is rounded towards zero. */ function average(int256 a, int256 b) internal pure returns (int256) { // Formula from the book "Hacker's Delight" int256 x = (a & b) + ((a ^ b) >> 1); return x + (int256(uint256(x) >> 255) & (a ^ b)); } /** * @dev Returns the absolute unsigned value of a signed value. */ function abs(int256 n) internal pure returns (uint256) { unchecked { // must be unchecked in order to support `n = type(int256).min` return uint256(n >= 0 ? n : -n); } } }
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Contract Creation Code
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.