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{
"language": "Solidity",
"sources": {
"@openzeppelin/contracts/access/Ownable.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../utils/Context.sol\";\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract Ownable is Context {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Initializes the contract setting the deployer as the initial owner.\n */\n constructor() {\n _transferOwnership(_msgSender());\n }\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n _checkOwner();\n _;\n }\n\n /**\n * @dev Returns the address of the current owner.\n */\n function owner() public view virtual returns (address) {\n return _owner;\n }\n\n /**\n * @dev Throws if the sender is not the owner.\n */\n function _checkOwner() internal view virtual {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n }\n\n /**\n * @dev Leaves the contract without owner. It will not be possible to call\n * `onlyOwner` functions anymore. Can only be called by the current owner.\n *\n * NOTE: Renouncing ownership will leave the contract without an owner,\n * thereby removing any functionality that is only available to the owner.\n */\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual onlyOwner {\n require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n _transferOwnership(newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n}\n"
},
"@openzeppelin/contracts/security/ReentrancyGuard.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.8.0) (security/ReentrancyGuard.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Contract module that helps prevent reentrant calls to a function.\n *\n * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier\n * available, which can be applied to functions to make sure there are no nested\n * (reentrant) calls to them.\n *\n * Note that because there is a single `nonReentrant` guard, functions marked as\n * `nonReentrant` may not call one another. This can be worked around by making\n * those functions `private`, and then adding `external` `nonReentrant` entry\n * points to them.\n *\n * TIP: If you would like to learn more about reentrancy and alternative ways\n * to protect against it, check out our blog post\n * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].\n */\nabstract contract ReentrancyGuard {\n // Booleans are more expensive than uint256 or any type that takes up a full\n // word because each write operation emits an extra SLOAD to first read the\n // slot's contents, replace the bits taken up by the boolean, and then write\n // back. This is the compiler's defense against contract upgrades and\n // pointer aliasing, and it cannot be disabled.\n\n // The values being non-zero value makes deployment a bit more expensive,\n // but in exchange the refund on every call to nonReentrant will be lower in\n // amount. Since refunds are capped to a percentage of the total\n // transaction's gas, it is best to keep them low in cases like this one, to\n // increase the likelihood of the full refund coming into effect.\n uint256 private constant _NOT_ENTERED = 1;\n uint256 private constant _ENTERED = 2;\n\n uint256 private _status;\n\n constructor() {\n _status = _NOT_ENTERED;\n }\n\n /**\n * @dev Prevents a contract from calling itself, directly or indirectly.\n * Calling a `nonReentrant` function from another `nonReentrant`\n * function is not supported. It is possible to prevent this from happening\n * by making the `nonReentrant` function external, and making it call a\n * `private` function that does the actual work.\n */\n modifier nonReentrant() {\n _nonReentrantBefore();\n _;\n _nonReentrantAfter();\n }\n\n function _nonReentrantBefore() private {\n // On the first call to nonReentrant, _status will be _NOT_ENTERED\n require(_status != _ENTERED, \"ReentrancyGuard: reentrant call\");\n\n // Any calls to nonReentrant after this point will fail\n _status = _ENTERED;\n }\n\n function _nonReentrantAfter() private {\n // By storing the original value once again, a refund is triggered (see\n // https://eips.ethereum.org/EIPS/eip-2200)\n _status = _NOT_ENTERED;\n }\n}\n"
},
"@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../IERC721.sol\";\n\n/**\n * @title ERC-721 Non-Fungible Token Standard, optional metadata extension\n * @dev See https://eips.ethereum.org/EIPS/eip-721\n */\ninterface IERC721Metadata is IERC721 {\n /**\n * @dev Returns the token collection name.\n */\n function name() external view returns (string memory);\n\n /**\n * @dev Returns the token collection symbol.\n */\n function symbol() external view returns (string memory);\n\n /**\n * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.\n */\n function tokenURI(uint256 tokenId) external view returns (string memory);\n}\n"
},
"@openzeppelin/contracts/token/ERC721/IERC721.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC721/IERC721.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../../utils/introspection/IERC165.sol\";\n\n/**\n * @dev Required interface of an ERC721 compliant contract.\n */\ninterface IERC721 is IERC165 {\n /**\n * @dev Emitted when `tokenId` token is transferred from `from` to `to`.\n */\n event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);\n\n /**\n * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.\n */\n event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);\n\n /**\n * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.\n */\n event ApprovalForAll(address indexed owner, address indexed operator, bool approved);\n\n /**\n * @dev Returns the number of tokens in ``owner``'s account.\n */\n function balanceOf(address owner) external view returns (uint256 balance);\n\n /**\n * @dev Returns the owner of the `tokenId` token.\n *\n * Requirements:\n *\n * - `tokenId` must exist.\n */\n function ownerOf(uint256 tokenId) external view returns (address owner);\n\n /**\n * @dev Safely transfers `tokenId` token from `from` to `to`.\n *\n * Requirements:\n *\n * - `from` cannot be the zero address.\n * - `to` cannot be the zero address.\n * - `tokenId` token must exist and be owned by `from`.\n * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.\n * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\n *\n * Emits a {Transfer} event.\n */\n function safeTransferFrom(\n address from,\n address to,\n uint256 tokenId,\n bytes calldata data\n ) external;\n\n /**\n * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients\n * are aware of the ERC721 protocol to prevent tokens from being forever locked.\n *\n * Requirements:\n *\n * - `from` cannot be the zero address.\n * - `to` cannot be the zero address.\n * - `tokenId` token must exist and be owned by `from`.\n * - If the caller is not `from`, it must have been allowed to move this token by either {approve} or {setApprovalForAll}.\n * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\n *\n * Emits a {Transfer} event.\n */\n function safeTransferFrom(\n address from,\n address to,\n uint256 tokenId\n ) external;\n\n /**\n * @dev Transfers `tokenId` token from `from` to `to`.\n *\n * WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721\n * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must\n * understand this adds an external call which potentially creates a reentrancy vulnerability.\n *\n * Requirements:\n *\n * - `from` cannot be the zero address.\n * - `to` cannot be the zero address.\n * - `tokenId` token must be owned by `from`.\n * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.\n *\n * Emits a {Transfer} event.\n */\n function transferFrom(\n address from,\n address to,\n uint256 tokenId\n ) external;\n\n /**\n * @dev Gives permission to `to` to transfer `tokenId` token to another account.\n * The approval is cleared when the token is transferred.\n *\n * Only a single account can be approved at a time, so approving the zero address clears previous approvals.\n *\n * Requirements:\n *\n * - The caller must own the token or be an approved operator.\n * - `tokenId` must exist.\n *\n * Emits an {Approval} event.\n */\n function approve(address to, uint256 tokenId) external;\n\n /**\n * @dev Approve or remove `operator` as an operator for the caller.\n * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.\n *\n * Requirements:\n *\n * - The `operator` cannot be the caller.\n *\n * Emits an {ApprovalForAll} event.\n */\n function setApprovalForAll(address operator, bool _approved) external;\n\n /**\n * @dev Returns the account approved for `tokenId` token.\n *\n * Requirements:\n *\n * - `tokenId` must exist.\n */\n function getApproved(uint256 tokenId) external view returns (address operator);\n\n /**\n * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.\n *\n * See {setApprovalForAll}\n */\n function isApprovedForAll(address owner, address operator) external view returns (bool);\n}\n"
},
"@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @title ERC721 token receiver interface\n * @dev Interface for any contract that wants to support safeTransfers\n * from ERC721 asset contracts.\n */\ninterface IERC721Receiver {\n /**\n * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}\n * by `operator` from `from`, this function is called.\n *\n * It must return its Solidity selector to confirm the token transfer.\n * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.\n *\n * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`.\n */\n function onERC721Received(\n address operator,\n address from,\n uint256 tokenId,\n bytes calldata data\n ) external returns (bytes4);\n}\n"
},
"@openzeppelin/contracts/utils/Address.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)\n\npragma solidity ^0.8.1;\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary Address {\n /**\n * @dev Returns true if `account` is a contract.\n *\n * [IMPORTANT]\n * ====\n * It is unsafe to assume that an address for which this function returns\n * false is an externally-owned account (EOA) and not a contract.\n *\n * Among others, `isContract` will return false for the following\n * types of addresses:\n *\n * - an externally-owned account\n * - a contract in construction\n * - an address where a contract will be created\n * - an address where a contract lived, but was destroyed\n * ====\n *\n * [IMPORTANT]\n * ====\n * You shouldn't rely on `isContract` to protect against flash loan attacks!\n *\n * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n * constructor.\n * ====\n */\n function isContract(address account) internal view returns (bool) {\n // This method relies on extcodesize/address.code.length, which returns 0\n // for contracts in construction, since the code is only stored at the end\n // of the constructor execution.\n\n return account.code.length > 0;\n }\n\n /**\n * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n * `recipient`, forwarding all available gas and reverting on errors.\n *\n * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n * of certain opcodes, possibly making contracts go over the 2300 gas limit\n * imposed by `transfer`, making them unable to receive funds via\n * `transfer`. {sendValue} removes this limitation.\n *\n * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n *\n * IMPORTANT: because control is transferred to `recipient`, care must be\n * taken to not create reentrancy vulnerabilities. Consider using\n * {ReentrancyGuard} or the\n * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n */\n function sendValue(address payable recipient, uint256 amount) internal {\n require(address(this).balance >= amount, \"Address: insufficient balance\");\n\n (bool success, ) = recipient.call{value: amount}(\"\");\n require(success, \"Address: unable to send value, recipient may have reverted\");\n }\n\n /**\n * @dev Performs a Solidity function call using a low level `call`. A\n * plain `call` is an unsafe replacement for a function call: use this\n * function instead.\n *\n * If `target` reverts with a revert reason, it is bubbled up by this\n * function (like regular Solidity function calls).\n *\n * Returns the raw returned data. To convert to the expected return value,\n * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n *\n * Requirements:\n *\n * - `target` must be a contract.\n * - calling `target` with `data` must not revert.\n *\n * _Available since v3.1._\n */\n function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, \"Address: low-level call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n * `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but also transferring `value` wei to `target`.\n *\n * Requirements:\n *\n * - the calling contract must have an ETH balance of at least `value`.\n * - the called Solidity function must be `payable`.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n * with `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(address(this).balance >= value, \"Address: insufficient balance for call\");\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n return functionStaticCall(target, data, \"Address: low-level static call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n (bool success, bytes memory returndata) = target.delegatecall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling\n * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.\n *\n * _Available since v4.8._\n */\n function verifyCallResultFromTarget(\n address target,\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n if (success) {\n if (returndata.length == 0) {\n // only check isContract if the call was successful and the return data is empty\n // otherwise we already know that it was a contract\n require(isContract(target), \"Address: call to non-contract\");\n }\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n /**\n * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the\n * revert reason or using the provided one.\n *\n * _Available since v4.3._\n */\n function verifyCallResult(\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal pure returns (bytes memory) {\n if (success) {\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n function _revert(bytes memory returndata, string memory errorMessage) private pure {\n // Look for revert reason and bubble it up if present\n if (returndata.length > 0) {\n // The easiest way to bubble the revert reason is using memory via assembly\n /// @solidity memory-safe-assembly\n assembly {\n let returndata_size := mload(returndata)\n revert(add(32, returndata), returndata_size)\n }\n } else {\n revert(errorMessage);\n }\n }\n}\n"
},
"@openzeppelin/contracts/utils/Context.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract Context {\n function _msgSender() internal view virtual returns (address) {\n return msg.sender;\n }\n\n function _msgData() internal view virtual returns (bytes calldata) {\n return msg.data;\n }\n}\n"
},
"@openzeppelin/contracts/utils/cryptography/MerkleProof.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.8.0) (utils/cryptography/MerkleProof.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev These functions deal with verification of Merkle Tree proofs.\n *\n * The tree and the proofs can be generated using our\n * https://github.com/OpenZeppelin/merkle-tree[JavaScript library].\n * You will find a quickstart guide in the readme.\n *\n * WARNING: You should avoid using leaf values that are 64 bytes long prior to\n * hashing, or use a hash function other than keccak256 for hashing leaves.\n * This is because the concatenation of a sorted pair of internal nodes in\n * the merkle tree could be reinterpreted as a leaf value.\n * OpenZeppelin's JavaScript library generates merkle trees that are safe\n * against this attack out of the box.\n */\nlibrary MerkleProof {\n /**\n * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree\n * defined by `root`. For this, a `proof` must be provided, containing\n * sibling hashes on the branch from the leaf to the root of the tree. Each\n * pair of leaves and each pair of pre-images are assumed to be sorted.\n */\n function verify(\n bytes32[] memory proof,\n bytes32 root,\n bytes32 leaf\n ) internal pure returns (bool) {\n return processProof(proof, leaf) == root;\n }\n\n /**\n * @dev Calldata version of {verify}\n *\n * _Available since v4.7._\n */\n function verifyCalldata(\n bytes32[] calldata proof,\n bytes32 root,\n bytes32 leaf\n ) internal pure returns (bool) {\n return processProofCalldata(proof, leaf) == root;\n }\n\n /**\n * @dev Returns the rebuilt hash obtained by traversing a Merkle tree up\n * from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt\n * hash matches the root of the tree. When processing the proof, the pairs\n * of leafs & pre-images are assumed to be sorted.\n *\n * _Available since v4.4._\n */\n function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) {\n bytes32 computedHash = leaf;\n for (uint256 i = 0; i < proof.length; i++) {\n computedHash = _hashPair(computedHash, proof[i]);\n }\n return computedHash;\n }\n\n /**\n * @dev Calldata version of {processProof}\n *\n * _Available since v4.7._\n */\n function processProofCalldata(bytes32[] calldata proof, bytes32 leaf) internal pure returns (bytes32) {\n bytes32 computedHash = leaf;\n for (uint256 i = 0; i < proof.length; i++) {\n computedHash = _hashPair(computedHash, proof[i]);\n }\n return computedHash;\n }\n\n /**\n * @dev Returns true if the `leaves` can be simultaneously proven to be a part of a merkle tree defined by\n * `root`, according to `proof` and `proofFlags` as described in {processMultiProof}.\n *\n * CAUTION: Not all merkle trees admit multiproofs. See {processMultiProof} for details.\n *\n * _Available since v4.7._\n */\n function multiProofVerify(\n bytes32[] memory proof,\n bool[] memory proofFlags,\n bytes32 root,\n bytes32[] memory leaves\n ) internal pure returns (bool) {\n return processMultiProof(proof, proofFlags, leaves) == root;\n }\n\n /**\n * @dev Calldata version of {multiProofVerify}\n *\n * CAUTION: Not all merkle trees admit multiproofs. See {processMultiProof} for details.\n *\n * _Available since v4.7._\n */\n function multiProofVerifyCalldata(\n bytes32[] calldata proof,\n bool[] calldata proofFlags,\n bytes32 root,\n bytes32[] memory leaves\n ) internal pure returns (bool) {\n return processMultiProofCalldata(proof, proofFlags, leaves) == root;\n }\n\n /**\n * @dev Returns the root of a tree reconstructed from `leaves` and sibling nodes in `proof`. The reconstruction\n * proceeds by incrementally reconstructing all inner nodes by combining a leaf/inner node with either another\n * leaf/inner node or a proof sibling node, depending on whether each `proofFlags` item is true or false\n * respectively.\n *\n * CAUTION: Not all merkle trees admit multiproofs. To use multiproofs, it is sufficient to ensure that: 1) the tree\n * is complete (but not necessarily perfect), 2) the leaves to be proven are in the opposite order they are in the\n * tree (i.e., as seen from right to left starting at the deepest layer and continuing at the next layer).\n *\n * _Available since v4.7._\n */\n function processMultiProof(\n bytes32[] memory proof,\n bool[] memory proofFlags,\n bytes32[] memory leaves\n ) internal pure returns (bytes32 merkleRoot) {\n // This function rebuild the root hash by traversing the tree up from the leaves. The root is rebuilt by\n // consuming and producing values on a queue. The queue starts with the `leaves` array, then goes onto the\n // `hashes` array. At the end of the process, the last hash in the `hashes` array should contain the root of\n // the merkle tree.\n uint256 leavesLen = leaves.length;\n uint256 totalHashes = proofFlags.length;\n\n // Check proof validity.\n require(leavesLen + proof.length - 1 == totalHashes, \"MerkleProof: invalid multiproof\");\n\n // The xxxPos values are \"pointers\" to the next value to consume in each array. All accesses are done using\n // `xxx[xxxPos++]`, which return the current value and increment the pointer, thus mimicking a queue's \"pop\".\n bytes32[] memory hashes = new bytes32[](totalHashes);\n uint256 leafPos = 0;\n uint256 hashPos = 0;\n uint256 proofPos = 0;\n // At each step, we compute the next hash using two values:\n // - a value from the \"main queue\". If not all leaves have been consumed, we get the next leaf, otherwise we\n // get the next hash.\n // - depending on the flag, either another value for the \"main queue\" (merging branches) or an element from the\n // `proof` array.\n for (uint256 i = 0; i < totalHashes; i++) {\n bytes32 a = leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++];\n bytes32 b = proofFlags[i] ? leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++] : proof[proofPos++];\n hashes[i] = _hashPair(a, b);\n }\n\n if (totalHashes > 0) {\n return hashes[totalHashes - 1];\n } else if (leavesLen > 0) {\n return leaves[0];\n } else {\n return proof[0];\n }\n }\n\n /**\n * @dev Calldata version of {processMultiProof}.\n *\n * CAUTION: Not all merkle trees admit multiproofs. See {processMultiProof} for details.\n *\n * _Available since v4.7._\n */\n function processMultiProofCalldata(\n bytes32[] calldata proof,\n bool[] calldata proofFlags,\n bytes32[] memory leaves\n ) internal pure returns (bytes32 merkleRoot) {\n // This function rebuild the root hash by traversing the tree up from the leaves. The root is rebuilt by\n // consuming and producing values on a queue. The queue starts with the `leaves` array, then goes onto the\n // `hashes` array. At the end of the process, the last hash in the `hashes` array should contain the root of\n // the merkle tree.\n uint256 leavesLen = leaves.length;\n uint256 totalHashes = proofFlags.length;\n\n // Check proof validity.\n require(leavesLen + proof.length - 1 == totalHashes, \"MerkleProof: invalid multiproof\");\n\n // The xxxPos values are \"pointers\" to the next value to consume in each array. All accesses are done using\n // `xxx[xxxPos++]`, which return the current value and increment the pointer, thus mimicking a queue's \"pop\".\n bytes32[] memory hashes = new bytes32[](totalHashes);\n uint256 leafPos = 0;\n uint256 hashPos = 0;\n uint256 proofPos = 0;\n // At each step, we compute the next hash using two values:\n // - a value from the \"main queue\". If not all leaves have been consumed, we get the next leaf, otherwise we\n // get the next hash.\n // - depending on the flag, either another value for the \"main queue\" (merging branches) or an element from the\n // `proof` array.\n for (uint256 i = 0; i < totalHashes; i++) {\n bytes32 a = leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++];\n bytes32 b = proofFlags[i] ? leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++] : proof[proofPos++];\n hashes[i] = _hashPair(a, b);\n }\n\n if (totalHashes > 0) {\n return hashes[totalHashes - 1];\n } else if (leavesLen > 0) {\n return leaves[0];\n } else {\n return proof[0];\n }\n }\n\n function _hashPair(bytes32 a, bytes32 b) private pure returns (bytes32) {\n return a < b ? _efficientHash(a, b) : _efficientHash(b, a);\n }\n\n function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) {\n /// @solidity memory-safe-assembly\n assembly {\n mstore(0x00, a)\n mstore(0x20, b)\n value := keccak256(0x00, 0x40)\n }\n }\n}\n"
},
"@openzeppelin/contracts/utils/introspection/ERC165.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)\n\npragma solidity ^0.8.0;\n\nimport \"./IERC165.sol\";\n\n/**\n * @dev Implementation of the {IERC165} interface.\n *\n * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check\n * for the additional interface id that will be supported. For example:\n *\n * ```solidity\n * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {\n * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);\n * }\n * ```\n *\n * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.\n */\nabstract contract ERC165 is IERC165 {\n /**\n * @dev See {IERC165-supportsInterface}.\n */\n function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {\n return interfaceId == type(IERC165).interfaceId;\n }\n}\n"
},
"@openzeppelin/contracts/utils/introspection/IERC165.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC165 standard, as defined in the\n * https://eips.ethereum.org/EIPS/eip-165[EIP].\n *\n * Implementers can declare support of contract interfaces, which can then be\n * queried by others ({ERC165Checker}).\n *\n * For an implementation, see {ERC165}.\n */\ninterface IERC165 {\n /**\n * @dev Returns true if this contract implements the interface defined by\n * `interfaceId`. See the corresponding\n * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]\n * to learn more about how these ids are created.\n *\n * This function call must use less than 30 000 gas.\n */\n function supportsInterface(bytes4 interfaceId) external view returns (bool);\n}\n"
},
"@openzeppelin/contracts/utils/math/Math.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/Math.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Standard math utilities missing in the Solidity language.\n */\nlibrary Math {\n enum Rounding {\n Down, // Toward negative infinity\n Up, // Toward infinity\n Zero // Toward zero\n }\n\n /**\n * @dev Returns the largest of two numbers.\n */\n function max(uint256 a, uint256 b) internal pure returns (uint256) {\n return a > b ? a : b;\n }\n\n /**\n * @dev Returns the smallest of two numbers.\n */\n function min(uint256 a, uint256 b) internal pure returns (uint256) {\n return a < b ? a : b;\n }\n\n /**\n * @dev Returns the average of two numbers. The result is rounded towards\n * zero.\n */\n function average(uint256 a, uint256 b) internal pure returns (uint256) {\n // (a + b) / 2 can overflow.\n return (a & b) + (a ^ b) / 2;\n }\n\n /**\n * @dev Returns the ceiling of the division of two numbers.\n *\n * This differs from standard division with `/` in that it rounds up instead\n * of rounding down.\n */\n function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {\n // (a + b - 1) / b can overflow on addition, so we distribute.\n return a == 0 ? 0 : (a - 1) / b + 1;\n }\n\n /**\n * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0\n * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)\n * with further edits by Uniswap Labs also under MIT license.\n */\n function mulDiv(\n uint256 x,\n uint256 y,\n uint256 denominator\n ) internal pure returns (uint256 result) {\n unchecked {\n // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use\n // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256\n // variables such that product = prod1 * 2^256 + prod0.\n uint256 prod0; // Least significant 256 bits of the product\n uint256 prod1; // Most significant 256 bits of the product\n assembly {\n let mm := mulmod(x, y, not(0))\n prod0 := mul(x, y)\n prod1 := sub(sub(mm, prod0), lt(mm, prod0))\n }\n\n // Handle non-overflow cases, 256 by 256 division.\n if (prod1 == 0) {\n return prod0 / denominator;\n }\n\n // Make sure the result is less than 2^256. Also prevents denominator == 0.\n require(denominator > prod1);\n\n ///////////////////////////////////////////////\n // 512 by 256 division.\n ///////////////////////////////////////////////\n\n // Make division exact by subtracting the remainder from [prod1 prod0].\n uint256 remainder;\n assembly {\n // Compute remainder using mulmod.\n remainder := mulmod(x, y, denominator)\n\n // Subtract 256 bit number from 512 bit number.\n prod1 := sub(prod1, gt(remainder, prod0))\n prod0 := sub(prod0, remainder)\n }\n\n // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.\n // See https://cs.stackexchange.com/q/138556/92363.\n\n // Does not overflow because the denominator cannot be zero at this stage in the function.\n uint256 twos = denominator & (~denominator + 1);\n assembly {\n // Divide denominator by twos.\n denominator := div(denominator, twos)\n\n // Divide [prod1 prod0] by twos.\n prod0 := div(prod0, twos)\n\n // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.\n twos := add(div(sub(0, twos), twos), 1)\n }\n\n // Shift in bits from prod1 into prod0.\n prod0 |= prod1 * twos;\n\n // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such\n // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for\n // four bits. That is, denominator * inv = 1 mod 2^4.\n uint256 inverse = (3 * denominator) ^ 2;\n\n // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works\n // in modular arithmetic, doubling the correct bits in each step.\n inverse *= 2 - denominator * inverse; // inverse mod 2^8\n inverse *= 2 - denominator * inverse; // inverse mod 2^16\n inverse *= 2 - denominator * inverse; // inverse mod 2^32\n inverse *= 2 - denominator * inverse; // inverse mod 2^64\n inverse *= 2 - denominator * inverse; // inverse mod 2^128\n inverse *= 2 - denominator * inverse; // inverse mod 2^256\n\n // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.\n // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is\n // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1\n // is no longer required.\n result = prod0 * inverse;\n return result;\n }\n }\n\n /**\n * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.\n */\n function mulDiv(\n uint256 x,\n uint256 y,\n uint256 denominator,\n Rounding rounding\n ) internal pure returns (uint256) {\n uint256 result = mulDiv(x, y, denominator);\n if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {\n result += 1;\n }\n return result;\n }\n\n /**\n * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.\n *\n * Inspired by Henry S. Warren, Jr.'s \"Hacker's Delight\" (Chapter 11).\n */\n function sqrt(uint256 a) internal pure returns (uint256) {\n if (a == 0) {\n return 0;\n }\n\n // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.\n //\n // We know that the \"msb\" (most significant bit) of our target number `a` is a power of 2 such that we have\n // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.\n //\n // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`\n // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`\n // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`\n //\n // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.\n uint256 result = 1 << (log2(a) >> 1);\n\n // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,\n // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at\n // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision\n // into the expected uint128 result.\n unchecked {\n result = (result + a / result) >> 1;\n result = (result + a / result) >> 1;\n result = (result + a / result) >> 1;\n result = (result + a / result) >> 1;\n result = (result + a / result) >> 1;\n result = (result + a / result) >> 1;\n result = (result + a / result) >> 1;\n return min(result, a / result);\n }\n }\n\n /**\n * @notice Calculates sqrt(a), following the selected rounding direction.\n */\n function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {\n unchecked {\n uint256 result = sqrt(a);\n return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);\n }\n }\n\n /**\n * @dev Return the log in base 2, rounded down, of a positive value.\n * Returns 0 if given 0.\n */\n function log2(uint256 value) internal pure returns (uint256) {\n uint256 result = 0;\n unchecked {\n if (value >> 128 > 0) {\n value >>= 128;\n result += 128;\n }\n if (value >> 64 > 0) {\n value >>= 64;\n result += 64;\n }\n if (value >> 32 > 0) {\n value >>= 32;\n result += 32;\n }\n if (value >> 16 > 0) {\n value >>= 16;\n result += 16;\n }\n if (value >> 8 > 0) {\n value >>= 8;\n result += 8;\n }\n if (value >> 4 > 0) {\n value >>= 4;\n result += 4;\n }\n if (value >> 2 > 0) {\n value >>= 2;\n result += 2;\n }\n if (value >> 1 > 0) {\n result += 1;\n }\n }\n return result;\n }\n\n /**\n * @dev Return the log in base 2, following the selected rounding direction, of a positive value.\n * Returns 0 if given 0.\n */\n function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {\n unchecked {\n uint256 result = log2(value);\n return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);\n }\n }\n\n /**\n * @dev Return the log in base 10, rounded down, of a positive value.\n * Returns 0 if given 0.\n */\n function log10(uint256 value) internal pure returns (uint256) {\n uint256 result = 0;\n unchecked {\n if (value >= 10**64) {\n value /= 10**64;\n result += 64;\n }\n if (value >= 10**32) {\n value /= 10**32;\n result += 32;\n }\n if (value >= 10**16) {\n value /= 10**16;\n result += 16;\n }\n if (value >= 10**8) {\n value /= 10**8;\n result += 8;\n }\n if (value >= 10**4) {\n value /= 10**4;\n result += 4;\n }\n if (value >= 10**2) {\n value /= 10**2;\n result += 2;\n }\n if (value >= 10**1) {\n result += 1;\n }\n }\n return result;\n }\n\n /**\n * @dev Return the log in base 10, following the selected rounding direction, of a positive value.\n * Returns 0 if given 0.\n */\n function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {\n unchecked {\n uint256 result = log10(value);\n return result + (rounding == Rounding.Up && 10**result < value ? 1 : 0);\n }\n }\n\n /**\n * @dev Return the log in base 256, rounded down, of a positive value.\n * Returns 0 if given 0.\n *\n * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.\n */\n function log256(uint256 value) internal pure returns (uint256) {\n uint256 result = 0;\n unchecked {\n if (value >> 128 > 0) {\n value >>= 128;\n result += 16;\n }\n if (value >> 64 > 0) {\n value >>= 64;\n result += 8;\n }\n if (value >> 32 > 0) {\n value >>= 32;\n result += 4;\n }\n if (value >> 16 > 0) {\n value >>= 16;\n result += 2;\n }\n if (value >> 8 > 0) {\n result += 1;\n }\n }\n return result;\n }\n\n /**\n * @dev Return the log in base 10, following the selected rounding direction, of a positive value.\n * Returns 0 if given 0.\n */\n function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {\n unchecked {\n uint256 result = log256(value);\n return result + (rounding == Rounding.Up && 1 << (result * 8) < value ? 1 : 0);\n }\n }\n}\n"
},
"@openzeppelin/contracts/utils/Strings.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.8.0) (utils/Strings.sol)\n\npragma solidity ^0.8.0;\n\nimport \"./math/Math.sol\";\n\n/**\n * @dev String operations.\n */\nlibrary Strings {\n bytes16 private constant _SYMBOLS = \"0123456789abcdef\";\n uint8 private constant _ADDRESS_LENGTH = 20;\n\n /**\n * @dev Converts a `uint256` to its ASCII `string` decimal representation.\n */\n function toString(uint256 value) internal pure returns (string memory) {\n unchecked {\n uint256 length = Math.log10(value) + 1;\n string memory buffer = new string(length);\n uint256 ptr;\n /// @solidity memory-safe-assembly\n assembly {\n ptr := add(buffer, add(32, length))\n }\n while (true) {\n ptr--;\n /// @solidity memory-safe-assembly\n assembly {\n mstore8(ptr, byte(mod(value, 10), _SYMBOLS))\n }\n value /= 10;\n if (value == 0) break;\n }\n return buffer;\n }\n }\n\n /**\n * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.\n */\n function toHexString(uint256 value) internal pure returns (string memory) {\n unchecked {\n return toHexString(value, Math.log256(value) + 1);\n }\n }\n\n /**\n * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.\n */\n function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {\n bytes memory buffer = new bytes(2 * length + 2);\n buffer[0] = \"0\";\n buffer[1] = \"x\";\n for (uint256 i = 2 * length + 1; i > 1; --i) {\n buffer[i] = _SYMBOLS[value & 0xf];\n value >>= 4;\n }\n require(value == 0, \"Strings: hex length insufficient\");\n return string(buffer);\n }\n\n /**\n * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.\n */\n function toHexString(address addr) internal pure returns (string memory) {\n return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);\n }\n}\n"
},
"contracts/DerpleRage.sol": {
"content": "// SPDX-License-Identifier: MIT\n\npragma solidity >=0.8.9 <0.9.0;\n\nimport 'erc721a/contracts/extensions/ERC721AQueryable.sol';\nimport '@openzeppelin/contracts/access/Ownable.sol';\nimport '@openzeppelin/contracts/utils/cryptography/MerkleProof.sol';\nimport '@openzeppelin/contracts/security/ReentrancyGuard.sol';\n\ncontract DerpleRage is ERC721AQueryable, Ownable, ReentrancyGuard {\n\n using Strings for uint256;\n\n bytes32 public merkleRoot;\n mapping(address => bool) public whitelistClaimed;\n\n string public uriPrefix = '';\n string public uriSuffix = '.json';\n string public hiddenMetadataUri;\n \n uint256 public cost;\n uint256 public maxSupply;\n uint256 public maxMintAmountPerTx;\n\n bool public paused = true;\n bool public whitelistMintEnabled = false;\n bool public revealed = false;\n\n constructor(\n string memory _tokenName,\n string memory _tokenSymbol,\n uint256 _cost,\n uint256 _maxSupply,\n uint256 _maxMintAmountPerTx,\n string memory _hiddenMetadataUri\n ) ERC721A(_tokenName, _tokenSymbol) {\n setCost(_cost);\n maxSupply = _maxSupply;\n setMaxMintAmountPerTx(_maxMintAmountPerTx);\n setHiddenMetadataUri(_hiddenMetadataUri);\n }\n\n modifier mintCompliance(uint256 _mintAmount) {\n require(_mintAmount > 0 && _mintAmount <= maxMintAmountPerTx, 'Invalid mint amount!');\n require(totalSupply() + _mintAmount <= maxSupply, 'Max supply exceeded!');\n _;\n }\n\n modifier mintPriceCompliance(uint256 _mintAmount) {\n require(msg.value >= cost * _mintAmount, 'Insufficient funds!');\n _;\n }\n\n function whitelistMint(uint256 _mintAmount, bytes32[] calldata _merkleProof) public payable mintCompliance(_mintAmount) mintPriceCompliance(_mintAmount) {\n // Verify whitelist requirements\n require(whitelistMintEnabled, 'The whitelist sale is not enabled!');\n require(!whitelistClaimed[_msgSender()], 'Address already claimed!');\n bytes32 leaf = keccak256(abi.encodePacked(_msgSender()));\n require(MerkleProof.verify(_merkleProof, merkleRoot, leaf), 'Invalid proof!');\n\n whitelistClaimed[_msgSender()] = true;\n _safeMint(_msgSender(), _mintAmount);\n }\n\n function mint(uint256 _mintAmount) public payable mintCompliance(_mintAmount) mintPriceCompliance(_mintAmount) {\n require(!paused, 'The contract is paused!');\n\n _safeMint(_msgSender(), _mintAmount);\n }\n \n function mintForAddress(uint256 _mintAmount, address _receiver) public mintCompliance(_mintAmount) onlyOwner {\n _safeMint(_receiver, _mintAmount);\n }\n\n function _startTokenId() internal view virtual override returns (uint256) {\n return 1;\n }\n\n function tokenURI(uint256 _tokenId) public view virtual override returns (string memory) {\n require(_exists(_tokenId), 'ERC721Metadata: URI query for nonexistent token');\n\n if (revealed == false) {\n return hiddenMetadataUri;\n }\n\n string memory currentBaseURI = _baseURI();\n return bytes(currentBaseURI).length > 0\n ? string(abi.encodePacked(currentBaseURI, _tokenId.toString(), uriSuffix))\n : '';\n }\n\n function setRevealed(bool _state) public onlyOwner {\n revealed = _state;\n }\n\n function setCost(uint256 _cost) public onlyOwner {\n cost = _cost;\n }\n\n function setMaxMintAmountPerTx(uint256 _maxMintAmountPerTx) public onlyOwner {\n maxMintAmountPerTx = _maxMintAmountPerTx;\n }\n\n function setHiddenMetadataUri(string memory _hiddenMetadataUri) public onlyOwner {\n hiddenMetadataUri = _hiddenMetadataUri;\n }\n\n function setUriPrefix(string memory _uriPrefix) public onlyOwner {\n uriPrefix = _uriPrefix;\n }\n\n function setUriSuffix(string memory _uriSuffix) public onlyOwner {\n uriSuffix = _uriSuffix;\n }\n\n function setPaused(bool _state) public onlyOwner {\n paused = _state;\n }\n\n function setMerkleRoot(bytes32 _merkleRoot) public onlyOwner {\n merkleRoot = _merkleRoot;\n }\n\n function setWhitelistMintEnabled(bool _state) public onlyOwner {\n whitelistMintEnabled = _state;\n }\n\n function withdraw() public onlyOwner nonReentrant {\n // This will transfer the remaining contract balance to the owner.\n // Do not remove this otherwise you will not be able to withdraw the funds.\n // =============================================================================\n (bool os, ) = payable(owner()).call{value: address(this).balance}('');\n require(os);\n // =============================================================================\n }\n\n function _baseURI() internal view virtual override returns (string memory) {\n return uriPrefix;\n }\n}\n"
},
"erc721a/contracts/ERC721A.sol": {
"content": "// SPDX-License-Identifier: MIT\n// ERC721A Contracts v3.3.0\n// Creator: Chiru Labs\n\npragma solidity ^0.8.4;\n\nimport './IERC721A.sol';\nimport '@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol';\nimport '@openzeppelin/contracts/utils/Address.sol';\nimport '@openzeppelin/contracts/utils/Context.sol';\nimport '@openzeppelin/contracts/utils/Strings.sol';\nimport '@openzeppelin/contracts/utils/introspection/ERC165.sol';\n\n/**\n * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including\n * the Metadata extension. Built to optimize for lower gas during batch mints.\n *\n * Assumes serials are sequentially minted starting at _startTokenId() (defaults to 0, e.g. 0, 1, 2, 3..).\n *\n * Assumes that an owner cannot have more than 2**64 - 1 (max value of uint64) of supply.\n *\n * Assumes that the maximum token id cannot exceed 2**256 - 1 (max value of uint256).\n */\ncontract ERC721A is Context, ERC165, IERC721A {\n using Address for address;\n using Strings for uint256;\n\n // The tokenId of the next token to be minted.\n uint256 internal _currentIndex;\n\n // The number of tokens burned.\n uint256 internal _burnCounter;\n\n // Token name\n string private _name;\n\n // Token symbol\n string private _symbol;\n\n // Mapping from token ID to ownership details\n // An empty struct value does not necessarily mean the token is unowned. See _ownershipOf implementation for details.\n mapping(uint256 => TokenOwnership) internal _ownerships;\n\n // Mapping owner address to address data\n mapping(address => AddressData) private _addressData;\n\n // Mapping from token ID to approved address\n mapping(uint256 => address) private _tokenApprovals;\n\n // Mapping from owner to operator approvals\n mapping(address => mapping(address => bool)) private _operatorApprovals;\n\n constructor(string memory name_, string memory symbol_) {\n _name = name_;\n _symbol = symbol_;\n _currentIndex = _startTokenId();\n }\n\n /**\n * To change the starting tokenId, please override this function.\n */\n function _startTokenId() internal view virtual returns (uint256) {\n return 0;\n }\n\n /**\n * @dev Burned tokens are calculated here, use _totalMinted() if you want to count just minted tokens.\n */\n function totalSupply() public view override returns (uint256) {\n // Counter underflow is impossible as _burnCounter cannot be incremented\n // more than _currentIndex - _startTokenId() times\n unchecked {\n return _currentIndex - _burnCounter - _startTokenId();\n }\n }\n\n /**\n * Returns the total amount of tokens minted in the contract.\n */\n function _totalMinted() internal view returns (uint256) {\n // Counter underflow is impossible as _currentIndex does not decrement,\n // and it is initialized to _startTokenId()\n unchecked {\n return _currentIndex - _startTokenId();\n }\n }\n\n /**\n * @dev See {IERC165-supportsInterface}.\n */\n function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {\n return\n interfaceId == type(IERC721).interfaceId ||\n interfaceId == type(IERC721Metadata).interfaceId ||\n super.supportsInterface(interfaceId);\n }\n\n /**\n * @dev See {IERC721-balanceOf}.\n */\n function balanceOf(address owner) public view override returns (uint256) {\n if (owner == address(0)) revert BalanceQueryForZeroAddress();\n return uint256(_addressData[owner].balance);\n }\n\n /**\n * Returns the number of tokens minted by `owner`.\n */\n function _numberMinted(address owner) internal view returns (uint256) {\n return uint256(_addressData[owner].numberMinted);\n }\n\n /**\n * Returns the number of tokens burned by or on behalf of `owner`.\n */\n function _numberBurned(address owner) internal view returns (uint256) {\n return uint256(_addressData[owner].numberBurned);\n }\n\n /**\n * Returns the auxillary data for `owner`. (e.g. number of whitelist mint slots used).\n */\n function _getAux(address owner) internal view returns (uint64) {\n return _addressData[owner].aux;\n }\n\n /**\n * Sets the auxillary data for `owner`. (e.g. number of whitelist mint slots used).\n * If there are multiple variables, please pack them into a uint64.\n */\n function _setAux(address owner, uint64 aux) internal {\n _addressData[owner].aux = aux;\n }\n\n /**\n * Gas spent here starts off proportional to the maximum mint batch size.\n * It gradually moves to O(1) as tokens get transferred around in the collection over time.\n */\n function _ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) {\n uint256 curr = tokenId;\n\n unchecked {\n if (_startTokenId() <= curr) if (curr < _currentIndex) {\n TokenOwnership memory ownership = _ownerships[curr];\n if (!ownership.burned) {\n if (ownership.addr != address(0)) {\n return ownership;\n }\n // Invariant:\n // There will always be an ownership that has an address and is not burned\n // before an ownership that does not have an address and is not burned.\n // Hence, curr will not underflow.\n while (true) {\n curr--;\n ownership = _ownerships[curr];\n if (ownership.addr != address(0)) {\n return ownership;\n }\n }\n }\n }\n }\n revert OwnerQueryForNonexistentToken();\n }\n\n /**\n * @dev See {IERC721-ownerOf}.\n */\n function ownerOf(uint256 tokenId) public view override returns (address) {\n return _ownershipOf(tokenId).addr;\n }\n\n /**\n * @dev See {IERC721Metadata-name}.\n */\n function name() public view virtual override returns (string memory) {\n return _name;\n }\n\n /**\n * @dev See {IERC721Metadata-symbol}.\n */\n function symbol() public view virtual override returns (string memory) {\n return _symbol;\n }\n\n /**\n * @dev See {IERC721Metadata-tokenURI}.\n */\n function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {\n if (!_exists(tokenId)) revert URIQueryForNonexistentToken();\n\n string memory baseURI = _baseURI();\n return bytes(baseURI).length != 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : '';\n }\n\n /**\n * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each\n * token will be the concatenation of the `baseURI` and the `tokenId`. Empty\n * by default, can be overriden in child contracts.\n */\n function _baseURI() internal view virtual returns (string memory) {\n return '';\n }\n\n /**\n * @dev See {IERC721-approve}.\n */\n function approve(address to, uint256 tokenId) public override {\n address owner = ERC721A.ownerOf(tokenId);\n if (to == owner) revert ApprovalToCurrentOwner();\n\n if (_msgSender() != owner) if(!isApprovedForAll(owner, _msgSender())) {\n revert ApprovalCallerNotOwnerNorApproved();\n }\n\n _approve(to, tokenId, owner);\n }\n\n /**\n * @dev See {IERC721-getApproved}.\n */\n function getApproved(uint256 tokenId) public view override returns (address) {\n if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken();\n\n return _tokenApprovals[tokenId];\n }\n\n /**\n * @dev See {IERC721-setApprovalForAll}.\n */\n function setApprovalForAll(address operator, bool approved) public virtual override {\n if (operator == _msgSender()) revert ApproveToCaller();\n\n _operatorApprovals[_msgSender()][operator] = approved;\n emit ApprovalForAll(_msgSender(), operator, approved);\n }\n\n /**\n * @dev See {IERC721-isApprovedForAll}.\n */\n function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {\n return _operatorApprovals[owner][operator];\n }\n\n /**\n * @dev See {IERC721-transferFrom}.\n */\n function transferFrom(\n address from,\n address to,\n uint256 tokenId\n ) public virtual override {\n _transfer(from, to, tokenId);\n }\n\n /**\n * @dev See {IERC721-safeTransferFrom}.\n */\n function safeTransferFrom(\n address from,\n address to,\n uint256 tokenId\n ) public virtual override {\n safeTransferFrom(from, to, tokenId, '');\n }\n\n /**\n * @dev See {IERC721-safeTransferFrom}.\n */\n function safeTransferFrom(\n address from,\n address to,\n uint256 tokenId,\n bytes memory _data\n ) public virtual override {\n _transfer(from, to, tokenId);\n if (to.isContract()) if(!_checkContractOnERC721Received(from, to, tokenId, _data)) {\n revert TransferToNonERC721ReceiverImplementer();\n }\n }\n\n /**\n * @dev Returns whether `tokenId` exists.\n *\n * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.\n *\n * Tokens start existing when they are minted (`_mint`),\n */\n function _exists(uint256 tokenId) internal view returns (bool) {\n return _startTokenId() <= tokenId && tokenId < _currentIndex && !_ownerships[tokenId].burned;\n }\n\n /**\n * @dev Equivalent to `_safeMint(to, quantity, '')`.\n */\n function _safeMint(address to, uint256 quantity) internal {\n _safeMint(to, quantity, '');\n }\n\n /**\n * @dev Safely mints `quantity` tokens and transfers them to `to`.\n *\n * Requirements:\n *\n * - If `to` refers to a smart contract, it must implement\n * {IERC721Receiver-onERC721Received}, which is called for each safe transfer.\n * - `quantity` must be greater than 0.\n *\n * Emits a {Transfer} event.\n */\n function _safeMint(\n address to,\n uint256 quantity,\n bytes memory _data\n ) internal {\n uint256 startTokenId = _currentIndex;\n if (to == address(0)) revert MintToZeroAddress();\n if (quantity == 0) revert MintZeroQuantity();\n\n _beforeTokenTransfers(address(0), to, startTokenId, quantity);\n\n // Overflows are incredibly unrealistic.\n // balance or numberMinted overflow if current value of either + quantity > 1.8e19 (2**64) - 1\n // updatedIndex overflows if _currentIndex + quantity > 1.2e77 (2**256) - 1\n unchecked {\n _addressData[to].balance += uint64(quantity);\n _addressData[to].numberMinted += uint64(quantity);\n\n _ownerships[startTokenId].addr = to;\n _ownerships[startTokenId].startTimestamp = uint64(block.timestamp);\n\n uint256 updatedIndex = startTokenId;\n uint256 end = updatedIndex + quantity;\n\n if (to.isContract()) {\n do {\n emit Transfer(address(0), to, updatedIndex);\n if (!_checkContractOnERC721Received(address(0), to, updatedIndex++, _data)) {\n revert TransferToNonERC721ReceiverImplementer();\n }\n } while (updatedIndex < end);\n // Reentrancy protection\n if (_currentIndex != startTokenId) revert();\n } else {\n do {\n emit Transfer(address(0), to, updatedIndex++);\n } while (updatedIndex < end);\n }\n _currentIndex = updatedIndex;\n }\n _afterTokenTransfers(address(0), to, startTokenId, quantity);\n }\n\n /**\n * @dev Mints `quantity` tokens and transfers them to `to`.\n *\n * Requirements:\n *\n * - `to` cannot be the zero address.\n * - `quantity` must be greater than 0.\n *\n * Emits a {Transfer} event.\n */\n function _mint(address to, uint256 quantity) internal {\n uint256 startTokenId = _currentIndex;\n if (to == address(0)) revert MintToZeroAddress();\n if (quantity == 0) revert MintZeroQuantity();\n\n _beforeTokenTransfers(address(0), to, startTokenId, quantity);\n\n // Overflows are incredibly unrealistic.\n // balance or numberMinted overflow if current value of either + quantity > 1.8e19 (2**64) - 1\n // updatedIndex overflows if _currentIndex + quantity > 1.2e77 (2**256) - 1\n unchecked {\n _addressData[to].balance += uint64(quantity);\n _addressData[to].numberMinted += uint64(quantity);\n\n _ownerships[startTokenId].addr = to;\n _ownerships[startTokenId].startTimestamp = uint64(block.timestamp);\n\n uint256 updatedIndex = startTokenId;\n uint256 end = updatedIndex + quantity;\n\n do {\n emit Transfer(address(0), to, updatedIndex++);\n } while (updatedIndex < end);\n\n _currentIndex = updatedIndex;\n }\n _afterTokenTransfers(address(0), to, startTokenId, quantity);\n }\n\n /**\n * @dev Transfers `tokenId` from `from` to `to`.\n *\n * Requirements:\n *\n * - `to` cannot be the zero address.\n * - `tokenId` token must be owned by `from`.\n *\n * Emits a {Transfer} event.\n */\n function _transfer(\n address from,\n address to,\n uint256 tokenId\n ) private {\n TokenOwnership memory prevOwnership = _ownershipOf(tokenId);\n\n if (prevOwnership.addr != from) revert TransferFromIncorrectOwner();\n\n bool isApprovedOrOwner = (_msgSender() == from ||\n isApprovedForAll(from, _msgSender()) ||\n getApproved(tokenId) == _msgSender());\n\n if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();\n if (to == address(0)) revert TransferToZeroAddress();\n\n _beforeTokenTransfers(from, to, tokenId, 1);\n\n // Clear approvals from the previous owner\n _approve(address(0), tokenId, from);\n\n // Underflow of the sender's balance is impossible because we check for\n // ownership above and the recipient's balance can't realistically overflow.\n // Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.\n unchecked {\n _addressData[from].balance -= 1;\n _addressData[to].balance += 1;\n\n TokenOwnership storage currSlot = _ownerships[tokenId];\n currSlot.addr = to;\n currSlot.startTimestamp = uint64(block.timestamp);\n\n // If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it.\n // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.\n uint256 nextTokenId = tokenId + 1;\n TokenOwnership storage nextSlot = _ownerships[nextTokenId];\n if (nextSlot.addr == address(0)) {\n // This will suffice for checking _exists(nextTokenId),\n // as a burned slot cannot contain the zero address.\n if (nextTokenId != _currentIndex) {\n nextSlot.addr = from;\n nextSlot.startTimestamp = prevOwnership.startTimestamp;\n }\n }\n }\n\n emit Transfer(from, to, tokenId);\n _afterTokenTransfers(from, to, tokenId, 1);\n }\n\n /**\n * @dev Equivalent to `_burn(tokenId, false)`.\n */\n function _burn(uint256 tokenId) internal virtual {\n _burn(tokenId, false);\n }\n\n /**\n * @dev Destroys `tokenId`.\n * The approval is cleared when the token is burned.\n *\n * Requirements:\n *\n * - `tokenId` must exist.\n *\n * Emits a {Transfer} event.\n */\n function _burn(uint256 tokenId, bool approvalCheck) internal virtual {\n TokenOwnership memory prevOwnership = _ownershipOf(tokenId);\n\n address from = prevOwnership.addr;\n\n if (approvalCheck) {\n bool isApprovedOrOwner = (_msgSender() == from ||\n isApprovedForAll(from, _msgSender()) ||\n getApproved(tokenId) == _msgSender());\n\n if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();\n }\n\n _beforeTokenTransfers(from, address(0), tokenId, 1);\n\n // Clear approvals from the previous owner\n _approve(address(0), tokenId, from);\n\n // Underflow of the sender's balance is impossible because we check for\n // ownership above and the recipient's balance can't realistically overflow.\n // Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.\n unchecked {\n AddressData storage addressData = _addressData[from];\n addressData.balance -= 1;\n addressData.numberBurned += 1;\n\n // Keep track of who burned the token, and the timestamp of burning.\n TokenOwnership storage currSlot = _ownerships[tokenId];\n currSlot.addr = from;\n currSlot.startTimestamp = uint64(block.timestamp);\n currSlot.burned = true;\n\n // If the ownership slot of tokenId+1 is not explicitly set, that means the burn initiator owns it.\n // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.\n uint256 nextTokenId = tokenId + 1;\n TokenOwnership storage nextSlot = _ownerships[nextTokenId];\n if (nextSlot.addr == address(0)) {\n // This will suffice for checking _exists(nextTokenId),\n // as a burned slot cannot contain the zero address.\n if (nextTokenId != _currentIndex) {\n nextSlot.addr = from;\n nextSlot.startTimestamp = prevOwnership.startTimestamp;\n }\n }\n }\n\n emit Transfer(from, address(0), tokenId);\n _afterTokenTransfers(from, address(0), tokenId, 1);\n\n // Overflow not possible, as _burnCounter cannot be exceed _currentIndex times.\n unchecked {\n _burnCounter++;\n }\n }\n\n /**\n * @dev Approve `to` to operate on `tokenId`\n *\n * Emits a {Approval} event.\n */\n function _approve(\n address to,\n uint256 tokenId,\n address owner\n ) private {\n _tokenApprovals[tokenId] = to;\n emit Approval(owner, to, tokenId);\n }\n\n /**\n * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target contract.\n *\n * @param from address representing the previous owner of the given token ID\n * @param to target address that will receive the tokens\n * @param tokenId uint256 ID of the token to be transferred\n * @param _data bytes optional data to send along with the call\n * @return bool whether the call correctly returned the expected magic value\n */\n function _checkContractOnERC721Received(\n address from,\n address to,\n uint256 tokenId,\n bytes memory _data\n ) private returns (bool) {\n try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {\n return retval == IERC721Receiver(to).onERC721Received.selector;\n } catch (bytes memory reason) {\n if (reason.length == 0) {\n revert TransferToNonERC721ReceiverImplementer();\n } else {\n assembly {\n revert(add(32, reason), mload(reason))\n }\n }\n }\n }\n\n /**\n * @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting.\n * And also called before burning one token.\n *\n * startTokenId - the first token id to be transferred\n * quantity - the amount to be transferred\n *\n * Calling conditions:\n *\n * - When `from` and `to` are both non-zero, `from`'s `tokenId` will be\n * transferred to `to`.\n * - When `from` is zero, `tokenId` will be minted for `to`.\n * - When `to` is zero, `tokenId` will be burned by `from`.\n * - `from` and `to` are never both zero.\n */\n function _beforeTokenTransfers(\n address from,\n address to,\n uint256 startTokenId,\n uint256 quantity\n ) internal virtual {}\n\n /**\n * @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes\n * minting.\n * And also called after one token has been burned.\n *\n * startTokenId - the first token id to be transferred\n * quantity - the amount to be transferred\n *\n * Calling conditions:\n *\n * - When `from` and `to` are both non-zero, `from`'s `tokenId` has been\n * transferred to `to`.\n * - When `from` is zero, `tokenId` has been minted for `to`.\n * - When `to` is zero, `tokenId` has been burned by `from`.\n * - `from` and `to` are never both zero.\n */\n function _afterTokenTransfers(\n address from,\n address to,\n uint256 startTokenId,\n uint256 quantity\n ) internal virtual {}\n}\n"
},
"erc721a/contracts/extensions/ERC721AQueryable.sol": {
"content": "// SPDX-License-Identifier: MIT\n// ERC721A Contracts v3.3.0\n// Creator: Chiru Labs\n\npragma solidity ^0.8.4;\n\nimport './IERC721AQueryable.sol';\nimport '../ERC721A.sol';\n\n/**\n * @title ERC721A Queryable\n * @dev ERC721A subclass with convenience query functions.\n */\nabstract contract ERC721AQueryable is ERC721A, IERC721AQueryable {\n /**\n * @dev Returns the `TokenOwnership` struct at `tokenId` without reverting.\n *\n * If the `tokenId` is out of bounds:\n * - `addr` = `address(0)`\n * - `startTimestamp` = `0`\n * - `burned` = `false`\n *\n * If the `tokenId` is burned:\n * - `addr` = `<Address of owner before token was burned>`\n * - `startTimestamp` = `<Timestamp when token was burned>`\n * - `burned = `true`\n *\n * Otherwise:\n * - `addr` = `<Address of owner>`\n * - `startTimestamp` = `<Timestamp of start of ownership>`\n * - `burned = `false`\n */\n function explicitOwnershipOf(uint256 tokenId) public view override returns (TokenOwnership memory) {\n TokenOwnership memory ownership;\n if (tokenId < _startTokenId() || tokenId >= _currentIndex) {\n return ownership;\n }\n ownership = _ownerships[tokenId];\n if (ownership.burned) {\n return ownership;\n }\n return _ownershipOf(tokenId);\n }\n\n /**\n * @dev Returns an array of `TokenOwnership` structs at `tokenIds` in order.\n * See {ERC721AQueryable-explicitOwnershipOf}\n */\n function explicitOwnershipsOf(uint256[] memory tokenIds) external view override returns (TokenOwnership[] memory) {\n unchecked {\n uint256 tokenIdsLength = tokenIds.length;\n TokenOwnership[] memory ownerships = new TokenOwnership[](tokenIdsLength);\n for (uint256 i; i != tokenIdsLength; ++i) {\n ownerships[i] = explicitOwnershipOf(tokenIds[i]);\n }\n return ownerships;\n }\n }\n\n /**\n * @dev Returns an array of token IDs owned by `owner`,\n * in the range [`start`, `stop`)\n * (i.e. `start <= tokenId < stop`).\n *\n * This function allows for tokens to be queried if the collection\n * grows too big for a single call of {ERC721AQueryable-tokensOfOwner}.\n *\n * Requirements:\n *\n * - `start` < `stop`\n */\n function tokensOfOwnerIn(\n address owner,\n uint256 start,\n uint256 stop\n ) external view override returns (uint256[] memory) {\n unchecked {\n if (start >= stop) revert InvalidQueryRange();\n uint256 tokenIdsIdx;\n uint256 stopLimit = _currentIndex;\n // Set `start = max(start, _startTokenId())`.\n if (start < _startTokenId()) {\n start = _startTokenId();\n }\n // Set `stop = min(stop, _currentIndex)`.\n if (stop > stopLimit) {\n stop = stopLimit;\n }\n uint256 tokenIdsMaxLength = balanceOf(owner);\n // Set `tokenIdsMaxLength = min(balanceOf(owner), stop - start)`,\n // to cater for cases where `balanceOf(owner)` is too big.\n if (start < stop) {\n uint256 rangeLength = stop - start;\n if (rangeLength < tokenIdsMaxLength) {\n tokenIdsMaxLength = rangeLength;\n }\n } else {\n tokenIdsMaxLength = 0;\n }\n uint256[] memory tokenIds = new uint256[](tokenIdsMaxLength);\n if (tokenIdsMaxLength == 0) {\n return tokenIds;\n }\n // We need to call `explicitOwnershipOf(start)`,\n // because the slot at `start` may not be initialized.\n TokenOwnership memory ownership = explicitOwnershipOf(start);\n address currOwnershipAddr;\n // If the starting slot exists (i.e. not burned), initialize `currOwnershipAddr`.\n // `ownership.address` will not be zero, as `start` is clamped to the valid token ID range.\n if (!ownership.burned) {\n currOwnershipAddr = ownership.addr;\n }\n for (uint256 i = start; i != stop && tokenIdsIdx != tokenIdsMaxLength; ++i) {\n ownership = _ownerships[i];\n if (ownership.burned) {\n continue;\n }\n if (ownership.addr != address(0)) {\n currOwnershipAddr = ownership.addr;\n }\n if (currOwnershipAddr == owner) {\n tokenIds[tokenIdsIdx++] = i;\n }\n }\n // Downsize the array to fit.\n assembly {\n mstore(tokenIds, tokenIdsIdx)\n }\n return tokenIds;\n }\n }\n\n /**\n * @dev Returns an array of token IDs owned by `owner`.\n *\n * This function scans the ownership mapping and is O(totalSupply) in complexity.\n * It is meant to be called off-chain.\n *\n * See {ERC721AQueryable-tokensOfOwnerIn} for splitting the scan into\n * multiple smaller scans if the collection is large enough to cause\n * an out-of-gas error (10K pfp collections should be fine).\n */\n function tokensOfOwner(address owner) external view override returns (uint256[] memory) {\n unchecked {\n uint256 tokenIdsIdx;\n address currOwnershipAddr;\n uint256 tokenIdsLength = balanceOf(owner);\n uint256[] memory tokenIds = new uint256[](tokenIdsLength);\n TokenOwnership memory ownership;\n for (uint256 i = _startTokenId(); tokenIdsIdx != tokenIdsLength; ++i) {\n ownership = _ownerships[i];\n if (ownership.burned) {\n continue;\n }\n if (ownership.addr != address(0)) {\n currOwnershipAddr = ownership.addr;\n }\n if (currOwnershipAddr == owner) {\n tokenIds[tokenIdsIdx++] = i;\n }\n }\n return tokenIds;\n }\n }\n}\n"
},
"erc721a/contracts/extensions/IERC721AQueryable.sol": {
"content": "// SPDX-License-Identifier: MIT\n// ERC721A Contracts v3.3.0\n// Creator: Chiru Labs\n\npragma solidity ^0.8.4;\n\nimport '../IERC721A.sol';\n\n/**\n * @dev Interface of an ERC721AQueryable compliant contract.\n */\ninterface IERC721AQueryable is IERC721A {\n /**\n * Invalid query range (`start` >= `stop`).\n */\n error InvalidQueryRange();\n\n /**\n * @dev Returns the `TokenOwnership` struct at `tokenId` without reverting.\n *\n * If the `tokenId` is out of bounds:\n * - `addr` = `address(0)`\n * - `startTimestamp` = `0`\n * - `burned` = `false`\n *\n * If the `tokenId` is burned:\n * - `addr` = `<Address of owner before token was burned>`\n * - `startTimestamp` = `<Timestamp when token was burned>`\n * - `burned = `true`\n *\n * Otherwise:\n * - `addr` = `<Address of owner>`\n * - `startTimestamp` = `<Timestamp of start of ownership>`\n * - `burned = `false`\n */\n function explicitOwnershipOf(uint256 tokenId) external view returns (TokenOwnership memory);\n\n /**\n * @dev Returns an array of `TokenOwnership` structs at `tokenIds` in order.\n * See {ERC721AQueryable-explicitOwnershipOf}\n */\n function explicitOwnershipsOf(uint256[] memory tokenIds) external view returns (TokenOwnership[] memory);\n\n /**\n * @dev Returns an array of token IDs owned by `owner`,\n * in the range [`start`, `stop`)\n * (i.e. `start <= tokenId < stop`).\n *\n * This function allows for tokens to be queried if the collection\n * grows too big for a single call of {ERC721AQueryable-tokensOfOwner}.\n *\n * Requirements:\n *\n * - `start` < `stop`\n */\n function tokensOfOwnerIn(\n address owner,\n uint256 start,\n uint256 stop\n ) external view returns (uint256[] memory);\n\n /**\n * @dev Returns an array of token IDs owned by `owner`.\n *\n * This function scans the ownership mapping and is O(totalSupply) in complexity.\n * It is meant to be called off-chain.\n *\n * See {ERC721AQueryable-tokensOfOwnerIn} for splitting the scan into\n * multiple smaller scans if the collection is large enough to cause\n * an out-of-gas error (10K pfp collections should be fine).\n */\n function tokensOfOwner(address owner) external view returns (uint256[] memory);\n}\n"
},
"erc721a/contracts/IERC721A.sol": {
"content": "// SPDX-License-Identifier: MIT\n// ERC721A Contracts v3.3.0\n// Creator: Chiru Labs\n\npragma solidity ^0.8.4;\n\nimport '@openzeppelin/contracts/token/ERC721/IERC721.sol';\nimport '@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol';\n\n/**\n * @dev Interface of an ERC721A compliant contract.\n */\ninterface IERC721A is IERC721, IERC721Metadata {\n /**\n * The caller must own the token or be an approved operator.\n */\n error ApprovalCallerNotOwnerNorApproved();\n\n /**\n * The token does not exist.\n */\n error ApprovalQueryForNonexistentToken();\n\n /**\n * The caller cannot approve to their own address.\n */\n error ApproveToCaller();\n\n /**\n * The caller cannot approve to the current owner.\n */\n error ApprovalToCurrentOwner();\n\n /**\n * Cannot query the balance for the zero address.\n */\n error BalanceQueryForZeroAddress();\n\n /**\n * Cannot mint to the zero address.\n */\n error MintToZeroAddress();\n\n /**\n * The quantity of tokens minted must be more than zero.\n */\n error MintZeroQuantity();\n\n /**\n * The token does not exist.\n */\n error OwnerQueryForNonexistentToken();\n\n /**\n * The caller must own the token or be an approved operator.\n */\n error TransferCallerNotOwnerNorApproved();\n\n /**\n * The token must be owned by `from`.\n */\n error TransferFromIncorrectOwner();\n\n /**\n * Cannot safely transfer to a contract that does not implement the ERC721Receiver interface.\n */\n error TransferToNonERC721ReceiverImplementer();\n\n /**\n * Cannot transfer to the zero address.\n */\n error TransferToZeroAddress();\n\n /**\n * The token does not exist.\n */\n error URIQueryForNonexistentToken();\n\n // Compiler will pack this into a single 256bit word.\n struct TokenOwnership {\n // The address of the owner.\n address addr;\n // Keeps track of the start time of ownership with minimal overhead for tokenomics.\n uint64 startTimestamp;\n // Whether the token has been burned.\n bool burned;\n }\n\n // Compiler will pack this into a single 256bit word.\n struct AddressData {\n // Realistically, 2**64-1 is more than enough.\n uint64 balance;\n // Keeps track of mint count with minimal overhead for tokenomics.\n uint64 numberMinted;\n // Keeps track of burn count with minimal overhead for tokenomics.\n uint64 numberBurned;\n // For miscellaneous variable(s) pertaining to the address\n // (e.g. number of whitelist mint slots used).\n // If there are multiple variables, please pack them into a uint64.\n uint64 aux;\n }\n\n /**\n * @dev Returns the total amount of tokens stored by the contract.\n * \n * Burned tokens are calculated here, use `_totalMinted()` if you want to count just minted tokens.\n */\n function totalSupply() external view returns (uint256);\n}\n"
}
},
"settings": {
"optimizer": {
"enabled": true,
"runs": 200
},
"outputSelection": {
"*": {
"*": [
"evm.bytecode",
"evm.deployedBytecode",
"devdoc",
"userdoc",
"metadata",
"abi"
]
}
},
"libraries": {}
}
} |