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// SPDX-License-Identifier: MIT | |
pragma solidity ^0.8.0; | |
/** | |
* @dev Collection of functions related to the address type | |
*/ | |
library Address { | |
/** | |
* @dev Returns true if `account` is a contract. |
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// SPDX-License-Identifier: MIT | |
pragma solidity ^0.8.0; | |
/** | |
* @dev Collection of functions related to the address type | |
*/ | |
library Address { | |
/** | |
* @dev Returns true if `account` is a contract. |
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// SPDX-License-Identifier: MIT | |
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 |
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// SPDX-License-Identifier: MIT | |
// OpenZeppelin Contracts v4.4.0 (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 |
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// SPDX-License-Identifier: MIT | |
// OpenZeppelin Contracts v4.4.0 (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 |
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// SPDX-License-Identifier: MIT | |
// OpenZeppelin Contracts v4.4.0 (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 |
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// SPDX-License-Identifier: MIT | |
pragma solidity ^0.8.0; | |
import "@openzeppelin/contracts/access/Ownable.sol"; | |
import "@openzeppelin/contracts/utils/math/SafeMath.sol"; | |
import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol"; | |
import "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol"; | |
import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol"; | |
import "@openzeppelin/contracts/security/ReentrancyGuard.sol"; | |
import "@openzeppelin/contracts/utils/math/Math.sol"; |
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// SPDX-License-Identifier: MIT | |
pragma solidity ^0.8.0; | |
import "@openzeppelin/contracts/access/Ownable.sol"; | |
import "@openzeppelin/contracts/utils/math/SafeMath.sol"; | |
import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol"; | |
import "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol"; | |
import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol"; | |
import "@openzeppelin/contracts/security/ReentrancyGuard.sol"; | |
import "@openzeppelin/contracts/utils/math/Math.sol"; |
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// SPDX-License-Identifier: MIT | |
pragma solidity ^0.8.0; | |
import "@openzeppelin/contracts/access/Ownable.sol"; | |
import "@openzeppelin/contracts/utils/math/SafeMath.sol"; | |
import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol"; | |
import "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol"; | |
import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol"; |
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// SPDX-License-Identifier: GPL-3.0 | |
// File: @openzeppelin/contracts/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 |
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