ERC-721
Overview
Max Total Supply
4,269 DEAD
Holders
1,024
Market
Volume (24H)
N/A
Min Price (24H)
N/A
Max Price (24H)
N/A
Other Info
Token Contract
Balance
5 DEADLoading...
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Minimal Proxy Contract for 0xc0389d3242dedd6eb8dd3b8202823828e6031a6b
Contract Name:
BleverErc721C
Compiler Version
v0.8.28+commit.7893614a
Optimization Enabled:
Yes with 20000 runs
Other Settings:
paris EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
1234567891011121314151617181920212223242526// SPDX-License-Identifier: MITpragma solidity 0.8.28;import "@limitbreak/creator-token-contracts/contracts/erc721c/ERC721C.sol";import "@limitbreak/creator-token-contracts/contracts/programmable-royalties/BasicRoyalties.sol";import "@limitbreak/creator-token-contracts/contracts/access/OwnableInitializable.sol";import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";import "@openzeppelin/contracts/security/ReentrancyGuard.sol";import "./utils/Withdrawable.sol";import "./utils/Versioning.sol";/// @title BleverErc721C Contract with Minting Phases and Signature Verification/// @notice This contract allows for minting ERC721 tokens in phases with signature-based access control./// @dev Utilizes OpenZeppelin's upgradeable contract libraries, cryptography, and reentrancy protection.contract BleverErc721C isERC721CInitializable,BasicRoyaltiesInitializable,OwnableInitializable,ReentrancyGuard,Withdrawable,Versioning{using ECDSA for bytes32;/// @notice Stores the statistics of each phase, including total minted and per-user mints.
1234567891011121314151617181920212223242526// SPDX-License-Identifier: MITpragma solidity ^0.8.4;import "./OwnablePermissions.sol";import "@openzeppelin/contracts/access/Ownable.sol";abstract contract OwnableInitializable is OwnablePermissions, Ownable {error InitializableOwnable__OwnerAlreadyInitialized();bool private _ownerInitialized;/*** @dev When EIP-1167 is used to clone a contract that inherits Ownable permissions,* this is required to assign the initial contract owner, as the constructor is* not called during the cloning process.*/function initializeOwner(address owner_) public {if (owner() != address(0) || _ownerInitialized) {revert InitializableOwnable__OwnerAlreadyInitialized();}_transferOwnership(owner_);}
12345678// SPDX-License-Identifier: MITpragma solidity ^0.8.4;import "@openzeppelin/contracts/utils/Context.sol";abstract contract OwnablePermissions is Context {function _requireCallerIsContractOwner() internal view virtual;}
1234567891011121314151617181920212223242526// SPDX-License-Identifier: MITpragma solidity ^0.8.4;import "../utils/CreatorTokenBase.sol";import "../token/erc721/ERC721OpenZeppelin.sol";/*** @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 ERC721OpenZeppelin, CreatorTokenBase {function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {return interfaceId == type(ICreatorToken).interfaceId || super.supportsInterface(interfaceId);}/// @dev Ties the open-zeppelin _beforeTokenTransfer hook to more granular transfer validation logicfunction _beforeTokenTransfer(address from,address to,uint256 firstTokenId,uint256 batchSize) internal virtual override {for (uint256 i = 0; i < batchSize;) {
12345678910111213141516// SPDX-License-Identifier: MITpragma solidity ^0.8.4;import "../interfaces/ICreatorTokenTransferValidator.sol";interface ICreatorToken {event TransferValidatorUpdated(address oldValidator, address newValidator);function getTransferValidator() external view returns (ICreatorTokenTransferValidator);function getSecurityPolicy() external view returns (CollectionSecurityPolicy memory);function getWhitelistedOperators() external view returns (address[] memory);function getPermittedContractReceivers() external view returns (address[] memory);function isOperatorWhitelisted(address operator) external view returns (bool);function isContractReceiverPermitted(address receiver) external view returns (bool);function isTransferAllowed(address caller, address from, address to) external view returns (bool);}
12345678// SPDX-License-Identifier: MITpragma solidity ^0.8.4;import "./IEOARegistry.sol";import "./ITransferSecurityRegistry.sol";import "./ITransferValidator.sol";interface ICreatorTokenTransferValidator is ITransferSecurityRegistry, ITransferValidator, IEOARegistry {}
12345678// SPDX-License-Identifier: MITpragma solidity ^0.8.4;import "@openzeppelin/contracts/utils/introspection/IERC165.sol";interface IEOARegistry is IERC165 {function isVerifiedEOA(address account) external view returns (bool);}
1234567891011121314151617181920212223242526// SPDX-License-Identifier: MITpragma solidity ^0.8.4;import "../utils/TransferPolicy.sol";interface ITransferSecurityRegistry {event AddedToAllowlist(AllowlistTypes indexed kind, uint256 indexed id, address indexed account);event CreatedAllowlist(AllowlistTypes indexed kind, uint256 indexed id, string indexed name);event ReassignedAllowlistOwnership(AllowlistTypes indexed kind, uint256 indexed id, address indexed newOwner);event RemovedFromAllowlist(AllowlistTypes indexed kind, uint256 indexed id, address indexed account);event SetAllowlist(AllowlistTypes indexed kind, address indexed collection, uint120 indexed id);event SetTransferSecurityLevel(address indexed collection, TransferSecurityLevels level);function createOperatorWhitelist(string calldata name) external returns (uint120);function createPermittedContractReceiverAllowlist(string calldata name) external returns (uint120);function reassignOwnershipOfOperatorWhitelist(uint120 id, address newOwner) external;function reassignOwnershipOfPermittedContractReceiverAllowlist(uint120 id, address newOwner) external;function renounceOwnershipOfOperatorWhitelist(uint120 id) external;function renounceOwnershipOfPermittedContractReceiverAllowlist(uint120 id) external;function setTransferSecurityLevelOfCollection(address collection, TransferSecurityLevels level) external;function setOperatorWhitelistOfCollection(address collection, uint120 id) external;function setPermittedContractReceiverAllowlistOfCollection(address collection, uint120 id) external;function addOperatorToWhitelist(uint120 id, address operator) external;function addPermittedContractReceiverToAllowlist(uint120 id, address receiver) external;function removeOperatorFromWhitelist(uint120 id, address operator) external;function removePermittedContractReceiverFromAllowlist(uint120 id, address receiver) external;
12345678// SPDX-License-Identifier: MITpragma solidity ^0.8.4;import "../utils/TransferPolicy.sol";interface ITransferValidator {function applyCollectionTransferPolicy(address caller, address from, address to) external view;}
1234567891011121314151617181920212223242526// SPDX-License-Identifier: MITpragma solidity ^0.8.4;import "@openzeppelin/contracts/token/common/ERC2981.sol";/*** @title BasicRoyaltiesBase* @author Limit Break, Inc.* @dev Base functionality of an NFT mix-in contract implementing the most basic form of programmable royalties.*/abstract contract BasicRoyaltiesBase is ERC2981 {event DefaultRoyaltySet(address indexed receiver, uint96 feeNumerator);event TokenRoyaltySet(uint256 indexed tokenId, address indexed receiver, uint96 feeNumerator);function _setDefaultRoyalty(address receiver, uint96 feeNumerator) internal virtual override {super._setDefaultRoyalty(receiver, feeNumerator);emit DefaultRoyaltySet(receiver, feeNumerator);}function _setTokenRoyalty(uint256 tokenId, address receiver, uint96 feeNumerator) internal virtual override {super._setTokenRoyalty(tokenId, receiver, feeNumerator);emit TokenRoyaltySet(tokenId, receiver, feeNumerator);}}
1234567891011121314151617181920212223242526// SPDX-License-Identifier: MITpragma solidity ^0.8.4;import "../../access/OwnablePermissions.sol";import "@openzeppelin/contracts/token/ERC721/ERC721.sol";abstract contract ERC721OpenZeppelinBase is ERC721 {// Token namestring internal _contractName;// Token symbolstring internal _contractSymbol;function name() public view virtual override returns (string memory) {return _contractName;}function symbol() public view virtual override returns (string memory) {return _contractSymbol;}function _setNameAndSymbol(string memory name_, string memory symbol_) internal {_contractName = name_;_contractSymbol = symbol_;
1234567891011121314151617181920212223242526// SPDX-License-Identifier: MITpragma solidity ^0.8.4;import "../access/OwnablePermissions.sol";import "../interfaces/ICreatorToken.sol";import "../interfaces/ICreatorTokenTransferValidator.sol";import "../utils/TransferValidation.sol";import "@openzeppelin/contracts/interfaces/IERC165.sol";/*** @title CreatorTokenBase* @author Limit Break, Inc.* @notice CreatorTokenBase is an abstract contract that provides basic functionality for managing token* transfer policies through an implementation of ICreatorTokenTransferValidator. 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>* <ul>ICreatorToken: Implements the interface for creator tokens, providing view functions for token security policies.</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 whitelisted operators and permitted contract receivers.</ul>* <ul>Can be easily integrated into other token contracts as a base contract.</ul>*
1234567891011121314151617181920212223242526// SPDX-License-Identifier: MITpragma solidity ^0.8.4;enum AllowlistTypes {Operators,PermittedContractReceivers}enum ReceiverConstraints {None,NoCode,EOA}enum CallerConstraints {None,OperatorWhitelistEnableOTC,OperatorWhitelistDisableOTC}enum StakerConstraints {None,CallerIsTxOrigin,EOA}
1234567891011121314151617181920212223242526// SPDX-License-Identifier: MITpragma solidity ^0.8.4;import "@openzeppelin/contracts/utils/Context.sol";/*** @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 is Context {error ShouldNotMintToBurnAddress();/// @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(_msgSender(), to, tokenId, msg.value);} else if(toZeroAddress) {
1234567891011121314151617181920212223242526// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)pragma solidity ^0.8.0;import "../utils/Context.sol";/*** @dev Contract module which provides a basic access control mechanism, where* there is an account (an owner) that can be granted exclusive access to* specific functions.** By default, the owner account will be the one that deploys the contract. This* can later be changed with {transferOwnership}.** This module is used through inheritance. It will make available the modifier* `onlyOwner`, which can be applied to your functions to restrict their use to* the owner.*/abstract contract Ownable is Context {address private _owner;event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);/*** @dev Initializes the contract setting the deployer as the initial owner.
123456// SPDX-License-Identifier: MIT// OpenZeppelin Contracts v4.4.1 (interfaces/IERC165.sol)pragma solidity ^0.8.0;import "../utils/introspection/IERC165.sol";
12345678910111213141516171819202122232425// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.9.0) (interfaces/IERC2981.sol)pragma solidity ^0.8.0;import "../utils/introspection/IERC165.sol";/*** @dev Interface for the NFT Royalty Standard.** A standardized way to retrieve royalty payment information for non-fungible tokens (NFTs) to enable universal* support for royalty payments across all NFT marketplaces and ecosystem participants.** _Available since v4.5._*/interface IERC2981 is IERC165 {/*** @dev Returns how much royalty is owed and to whom, based on a sale price that may be denominated in any unit of* exchange. The royalty amount is denominated and should be paid in that same unit of exchange.*/function royaltyInfo(uint256 tokenId,uint256 salePrice) external view returns (address receiver, uint256 royaltyAmount);}
1234567891011121314151617181920212223242526// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.9.0) (security/ReentrancyGuard.sol)pragma solidity ^0.8.0;/*** @dev Contract module that helps prevent reentrant calls to a function.** Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier* available, which can be applied to functions to make sure there are no nested* (reentrant) calls to them.** Note that because there is a single `nonReentrant` guard, functions marked as* `nonReentrant` may not call one another. This can be worked around by making* those functions `private`, and then adding `external` `nonReentrant` entry* points to them.** TIP: If you would like to learn more about reentrancy and alternative ways* to protect against it, check out our blog post* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].*/abstract contract ReentrancyGuard {// Booleans are more expensive than uint256 or any type that takes up a full// word because each write operation emits an extra SLOAD to first read the// slot's contents, replace the bits taken up by the boolean, and then write// back. This is the compiler's defense against contract upgrades and
1234567891011121314151617181920212223242526// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.9.0) (token/common/ERC2981.sol)pragma solidity ^0.8.0;import "../../interfaces/IERC2981.sol";import "../../utils/introspection/ERC165.sol";/*** @dev Implementation of the NFT Royalty Standard, a standardized way to retrieve royalty payment information.** Royalty information can be specified globally for all token ids via {_setDefaultRoyalty}, and/or individually for* specific token ids via {_setTokenRoyalty}. The latter takes precedence over the first.** Royalty is specified as a fraction of sale price. {_feeDenominator} is overridable but defaults to 10000, meaning the* fee is specified in basis points by default.** IMPORTANT: ERC-2981 only specifies a way to signal royalty information and does not enforce its payment. See* https://eips.ethereum.org/EIPS/eip-2981#optional-royalty-payments[Rationale] in the EIP. Marketplaces are expected to* voluntarily pay royalties together with sales, but note that this standard is not yet widely supported.** _Available since v4.5._*/abstract contract ERC2981 is IERC2981, ERC165 {struct RoyaltyInfo {address receiver;
1234567891011121314151617181920212223242526// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.9.4) (token/ERC20/extensions/IERC20Permit.sol)pragma solidity ^0.8.0;/*** @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in* https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].** Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by* presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't* need to send a transaction, and thus is not required to hold Ether at all.** ==== Security Considerations** There are two important considerations concerning the use of `permit`. The first is that a valid permit signature* expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be* considered as an intention to spend the allowance in any specific way. The second is that because permits have* built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should* take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be* generally recommended is:** ```solidity* function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {* try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}* doThing(..., value);
1234567891011121314151617181920212223242526// 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.*/
1234567891011121314151617181920212223242526// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol)pragma solidity ^0.8.0;import "../IERC20.sol";import "../extensions/IERC20Permit.sol";import "../../../utils/Address.sol";/*** @title SafeERC20* @dev Wrappers around ERC20 operations that throw on failure (when the token* contract returns false). Tokens that return no value (and instead revert or* throw on failure) are also supported, non-reverting calls are assumed to be* successful.* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.*/library SafeERC20 {using Address for address;/*** @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,* non-reverting calls are assumed to be successful.*/function safeTransfer(IERC20 token, address to, uint256 value) internal {
1234567891011121314151617181920212223242526// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC721/ERC721.sol)pragma solidity ^0.8.0;import "./IERC721.sol";import "./IERC721Receiver.sol";import "./extensions/IERC721Metadata.sol";import "../../utils/Address.sol";import "../../utils/Context.sol";import "../../utils/Strings.sol";import "../../utils/introspection/ERC165.sol";/*** @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including* the Metadata extension, but not including the Enumerable extension, which is available separately as* {ERC721Enumerable}.*/contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {using Address for address;using Strings for uint256;// Token namestring private _name;// Token symbol
1234567891011121314151617181920212223242526// SPDX-License-Identifier: MIT// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)pragma solidity ^0.8.0;import "../IERC721.sol";/*** @title ERC-721 Non-Fungible Token Standard, optional metadata extension* @dev See https://eips.ethereum.org/EIPS/eip-721*/interface IERC721Metadata is IERC721 {/*** @dev Returns the token collection name.*/function name() external view returns (string memory);/*** @dev Returns the token collection symbol.*/function symbol() external view returns (string memory);/*** @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.*/function tokenURI(uint256 tokenId) external view returns (string memory);
1234567891011121314151617181920212223242526// 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);
1234567891011121314151617181920212223242526// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol)pragma solidity ^0.8.0;/*** @title ERC721 token receiver interface* @dev Interface for any contract that wants to support safeTransfers* from ERC721 asset contracts.*/interface IERC721Receiver {/*** @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}* by `operator` from `from`, this function is called.** It must return its Solidity selector to confirm the token transfer.* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.** The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`.*/function onERC721Received(address operator,address from,uint256 tokenId,bytes calldata data) external returns (bytes4);
1234567891011121314151617181920212223242526// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)pragma solidity ^0.8.1;/*** @dev Collection of functions related to the address type*/library Address {/*** @dev Returns true if `account` is a contract.** [IMPORTANT]* ====* It is unsafe to assume that an address for which this function returns* false is an externally-owned account (EOA) and not a contract.** Among others, `isContract` will return false for the following* types of addresses:** - an externally-owned account* - a contract in construction* - an address where a contract will be created* - an address where a contract lived, but was destroyed** Furthermore, `isContract` will also return true if the target contract within
1234567891011121314151617181920212223242526// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.9.4) (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;}function _contextSuffixLength() internal view virtual returns (uint256) {return 0;
1234567891011121314151617181920212223242526// 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) {
1234567891011121314151617181920212223242526// SPDX-License-Identifier: MIT// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)pragma solidity ^0.8.0;import "./IERC165.sol";/*** @dev Implementation of the {IERC165} interface.** Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check* for the additional interface id that will be supported. For example:** ```solidity* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);* }* ```** Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.*/abstract contract ERC165 is IERC165 {/*** @dev See {IERC165-supportsInterface}.*/function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
12345678910111213141516171819202122232425// 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);}
1234567891011121314151617181920212223242526// 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 infinityUp, // Toward infinityZero // 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) {
1234567891011121314151617181920212223242526// 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.
1234567891011121314151617181920212223242526// 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-assemblyassembly {ptr := add(buffer, add(32, length))
123456789101112131415// SPDX-License-Identifier: MITpragma solidity 0.8.28;abstract contract Versioning {// The version of the contractstring public version;constructor() {}// Set the version of the contractfunction _setVersion(string memory _version) internal {version = _version;}}
1234567891011121314151617181920212223242526// SPDX-License-Identifier: MITpragma solidity 0.8.28;import "@openzeppelin/contracts/security/ReentrancyGuard.sol";import "@openzeppelin/contracts/token/ERC20/IERC20.sol";import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";abstract contract Withdrawable is ReentrancyGuard {using SafeERC20 for IERC20;event EtherWithdrawn(address indexed to, uint256 amount);event ERC20Withdrawn(address indexed token,address indexed to,uint256 amount);/// @notice Allows the withdrawal of Ether from the contract./// @dev This function should be called by an access-controlled function in the inheriting contract./// @param to The address to send the Ether to./// @param amount The amount of Ether to withdraw./// @return success Whether the withdrawal was successful.function _withdraw(address to,uint256 amount) internal nonReentrant returns (bool success) {
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A token is a representation of an on-chain or off-chain asset. The token page shows information such as price, total supply, holders, transfers and social links. Learn more about this page in our Knowledge Base.