{ "language": "Solidity", "sources": { "contracts/ERC20Airdrops.sol": { "content": "// SPDX-License-Identifier: UNLICENSED\n\npragma solidity =0.8.3;\n\nimport \"@openzeppelin/contracts/token/ERC20/IERC20.sol\";\nimport \"@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol\";\nimport \"./MerkleProof.sol\";\n\ncontract ERC20Airdrops is MerkleProof {\n using SafeERC20 for IERC20;\n\n mapping(address => mapping(bytes32 => uint256)) public deadlineOf;\n mapping(address => mapping(bytes32 => address)) public walletOf;\n mapping(address => mapping(bytes32 => mapping(bytes32 => bool))) internal _hasClaimed;\n\n event AddMerkleRoot(address indexed token, bytes32 indexed merkleRoot, address wallet, uint256 deadline);\n event Claim(\n address indexed token,\n bytes32 indexed merkleRoot,\n address wallet,\n address indexed account,\n uint256 amount\n );\n\n function addMerkleRoot(\n address token,\n bytes32 merkleRoot,\n uint256 deadline\n ) external {\n address wallet = walletOf[token][merkleRoot];\n require(wallet == address(0), \"LEVX: DUPLICATE_ROOT\");\n walletOf[token][merkleRoot] = msg.sender;\n deadlineOf[token][merkleRoot] = deadline;\n\n emit AddMerkleRoot(token, merkleRoot, msg.sender, deadline);\n }\n\n function claim(\n address token,\n bytes32 merkleRoot,\n bytes32[] calldata merkleProof,\n uint256 amount\n ) external {\n address wallet = walletOf[token][merkleRoot];\n require(wallet != address(0), \"LEVX: INVALID_ROOT\");\n require(block.timestamp < deadlineOf[token][merkleRoot], \"LEVX: EXPIRED\");\n\n bytes32 leaf = keccak256(abi.encodePacked(msg.sender, amount));\n require(!_hasClaimed[token][merkleRoot][leaf], \"LEVX: FORBIDDEN\");\n require(verify(merkleRoot, leaf, merkleProof), \"LEVX: INVALID_PROOF\");\n\n _hasClaimed[token][merkleRoot][leaf] = true;\n IERC20(token).safeTransferFrom(wallet, msg.sender, amount);\n\n emit Claim(token, merkleRoot, wallet, msg.sender, amount);\n }\n}\n" }, "@openzeppelin/contracts/token/ERC20/IERC20.sol": { "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/IERC20.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC20 standard as defined in the EIP.\n */\ninterface IERC20 {\n /**\n * @dev Returns the amount of tokens in existence.\n */\n function totalSupply() external view returns (uint256);\n\n /**\n * @dev Returns the amount of tokens owned by `account`.\n */\n function balanceOf(address account) external view returns (uint256);\n\n /**\n * @dev Moves `amount` tokens from the caller's account to `to`.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * Emits a {Transfer} event.\n */\n function transfer(address to, uint256 amount) external returns (bool);\n\n /**\n * @dev Returns the remaining number of tokens that `spender` will be\n * allowed to spend on behalf of `owner` through {transferFrom}. This is\n * zero by default.\n *\n * This value changes when {approve} or {transferFrom} are called.\n */\n function allowance(address owner, address spender) external view returns (uint256);\n\n /**\n * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * IMPORTANT: Beware that changing an allowance with this method brings the risk\n * that someone may use both the old and the new allowance by unfortunate\n * transaction ordering. One possible solution to mitigate this race\n * condition is to first reduce the spender's allowance to 0 and set the\n * desired value afterwards:\n * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\n *\n * Emits an {Approval} event.\n */\n function approve(address spender, uint256 amount) external returns (bool);\n\n /**\n * @dev Moves `amount` tokens from `from` to `to` using the\n * allowance mechanism. `amount` is then deducted from the caller's\n * allowance.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * Emits a {Transfer} event.\n */\n function transferFrom(\n address from,\n address to,\n uint256 amount\n ) external returns (bool);\n\n /**\n * @dev Emitted when `value` tokens are moved from one account (`from`) to\n * another (`to`).\n *\n * Note that `value` may be zero.\n */\n event Transfer(address indexed from, address indexed to, uint256 value);\n\n /**\n * @dev Emitted when the allowance of a `spender` for an `owner` is set by\n * a call to {approve}. `value` is the new allowance.\n */\n event Approval(address indexed owner, address indexed spender, uint256 value);\n}\n" }, "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol": { "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../IERC20.sol\";\nimport \"../../../utils/Address.sol\";\n\n/**\n * @title SafeERC20\n * @dev Wrappers around ERC20 operations that throw on failure (when the token\n * contract returns false). Tokens that return no value (and instead revert or\n * throw on failure) are also supported, non-reverting calls are assumed to be\n * successful.\n * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,\n * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.\n */\nlibrary SafeERC20 {\n using Address for address;\n\n function safeTransfer(\n IERC20 token,\n address to,\n uint256 value\n ) internal {\n _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));\n }\n\n function safeTransferFrom(\n IERC20 token,\n address from,\n address to,\n uint256 value\n ) internal {\n _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));\n }\n\n /**\n * @dev Deprecated. This function has issues similar to the ones found in\n * {IERC20-approve}, and its usage is discouraged.\n *\n * Whenever possible, use {safeIncreaseAllowance} and\n * {safeDecreaseAllowance} instead.\n */\n function safeApprove(\n IERC20 token,\n address spender,\n uint256 value\n ) internal {\n // safeApprove should only be called when setting an initial allowance,\n // or when resetting it to zero. To increase and decrease it, use\n // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'\n require(\n (value == 0) || (token.allowance(address(this), spender) == 0),\n \"SafeERC20: approve from non-zero to non-zero allowance\"\n );\n _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));\n }\n\n function safeIncreaseAllowance(\n IERC20 token,\n address spender,\n uint256 value\n ) internal {\n uint256 newAllowance = token.allowance(address(this), spender) + value;\n _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));\n }\n\n function safeDecreaseAllowance(\n IERC20 token,\n address spender,\n uint256 value\n ) internal {\n unchecked {\n uint256 oldAllowance = token.allowance(address(this), spender);\n require(oldAllowance >= value, \"SafeERC20: decreased allowance below zero\");\n uint256 newAllowance = oldAllowance - value;\n _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));\n }\n }\n\n /**\n * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement\n * on the return value: the return value is optional (but if data is returned, it must not be false).\n * @param token The token targeted by the call.\n * @param data The call data (encoded using abi.encode or one of its variants).\n */\n function _callOptionalReturn(IERC20 token, bytes memory data) private {\n // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since\n // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that\n // the target address contains contract code and also asserts for success in the low-level call.\n\n bytes memory returndata = address(token).functionCall(data, \"SafeERC20: low-level call failed\");\n if (returndata.length > 0) {\n // Return data is optional\n require(abi.decode(returndata, (bool)), \"SafeERC20: ERC20 operation did not succeed\");\n }\n }\n}\n" }, "contracts/MerkleProof.sol": { "content": "// SPDX-License-Identifier: UNLICENSED\n\npragma solidity =0.8.3;\n\ncontract MerkleProof {\n function verify(\n bytes32 root,\n bytes32 leaf,\n bytes32[] memory proof\n ) public pure returns (bool) {\n bytes32 computedHash = leaf;\n\n for (uint256 i = 0; i < proof.length; i++) {\n bytes32 proofElement = proof[i];\n\n if (computedHash < proofElement) {\n // Hash(current computed hash + current element of the proof)\n computedHash = keccak256(abi.encodePacked(computedHash, proofElement));\n } else {\n // Hash(current element of the proof + current computed hash)\n computedHash = keccak256(abi.encodePacked(proofElement, computedHash));\n }\n }\n\n // Check if the computed hash (root) is equal to the provided root\n return computedHash == root;\n }\n}\n" }, "@openzeppelin/contracts/utils/Address.sol": { "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.5.0) (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 functionCall(target, data, \"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 require(isContract(target), \"Address: call to non-contract\");\n\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResult(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 require(isContract(target), \"Address: static call to non-contract\");\n\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResult(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 require(isContract(target), \"Address: delegate call to non-contract\");\n\n (bool success, bytes memory returndata) = target.delegatecall(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\n /**\n * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the\n * revert reason 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 // 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\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}\n" }, "contracts/LevxAirdrop.sol": { "content": "// SPDX-License-Identifier: UNLICENSED\n\npragma solidity =0.8.3;\n\nimport \"@openzeppelin/contracts/access/Ownable.sol\";\nimport \"@openzeppelin/contracts/token/ERC20/IERC20.sol\";\nimport \"@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol\";\nimport \"./MerkleProof.sol\";\n\ncontract LevxAirdrop is Ownable, MerkleProof {\n using SafeERC20 for IERC20;\n\n address public immutable levx;\n mapping(bytes32 => bool) public isValidMerkleRoot;\n mapping(bytes32 => mapping(bytes32 => bool)) internal _hasClaimed;\n\n event AddMerkleRoot(bytes32 indexed merkleRoot);\n event Claim(bytes32 indexed merkleRoot, address indexed account, uint256 amount);\n\n constructor(address _owner, address _levx) {\n levx = _levx;\n _transferOwnership(_owner);\n }\n\n function addMerkleRoot(bytes32 merkleRoot) external onlyOwner {\n require(!isValidMerkleRoot[merkleRoot], \"SHOYU: DUPLICATE_ROOT\");\n isValidMerkleRoot[merkleRoot] = true;\n\n emit AddMerkleRoot(merkleRoot);\n }\n\n function claim(\n bytes32 merkleRoot,\n bytes32[] calldata merkleProof,\n uint256 amount\n ) external {\n require(isValidMerkleRoot[merkleRoot], \"SHOYU: INVALID_ROOT\");\n\n bytes32 leaf = keccak256(abi.encodePacked(msg.sender, amount));\n require(!_hasClaimed[merkleRoot][leaf], \"SHOYU: FORBIDDEN\");\n require(verify(merkleRoot, leaf, merkleProof), \"SHOYU: INVALID_PROOF\");\n\n _hasClaimed[merkleRoot][leaf] = true;\n IERC20(levx).safeTransferFrom(owner(), msg.sender, amount);\n\n emit Claim(merkleRoot, msg.sender, amount);\n }\n}\n" }, "@openzeppelin/contracts/access/Ownable.sol": { "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (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 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 called by any account other than the owner.\n */\n modifier onlyOwner() {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n _;\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/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" }, "contracts/NFTAirdropsAndSales.sol": { "content": "// SPDX-License-Identifier: UNLICENSED\n\npragma solidity =0.8.3;\n\nimport \"@openzeppelin/contracts/access/Ownable.sol\";\nimport \"@openzeppelin/contracts/utils/cryptography/ECDSA.sol\";\nimport \"@shoyunft/contracts/contracts/interfaces/INFT721.sol\";\nimport \"@openzeppelin/contracts/token/ERC20/IERC20.sol\";\nimport \"@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol\";\n\ncontract NFTAirdropsAndSales is Ownable {\n using SafeERC20 for IERC20;\n\n address public immutable nftContract;\n address public immutable levx;\n address public immutable wallet;\n mapping(bytes32 => Airdrop) public airdrops;\n mapping(address => bool) public isMinter;\n mapping(bytes32 => mapping(bytes32 => bool)) internal _minted;\n\n struct Airdrop {\n address signer;\n uint64 deadline;\n uint256 nextTokenId;\n uint256 maxTokenId;\n }\n\n event SetMinter(address account, bool indexed isMinter);\n event Add(bytes32 indexed slug, address signer, uint64 deadline, uint256 fromTokenId, uint256 maxTokenId);\n event Claim(bytes32 indexed slug, bytes32 indexed id, address indexed to, uint256 tokenId, uint256 price);\n\n constructor(\n address _nftContract,\n address _levx,\n address _wallet\n ) {\n nftContract = _nftContract;\n levx = _levx;\n wallet = _wallet;\n }\n\n function setMinter(address account, bool _isMinter) external onlyOwner {\n isMinter[account] = _isMinter;\n\n emit SetMinter(account, _isMinter);\n }\n\n function transferOwnershipOfNFTContract(address newOwner) external onlyOwner {\n INFT721(nftContract).transferOwnership(newOwner);\n }\n\n function setRoyaltyFeeRecipient(address _royaltyFeeRecipient) external onlyOwner {\n INFT721(nftContract).setRoyaltyFeeRecipient(_royaltyFeeRecipient);\n }\n\n function setRoyaltyFee(uint8 _royaltyFee) external onlyOwner {\n INFT721(nftContract).setRoyaltyFee(_royaltyFee);\n }\n\n function setTokenURI(uint256 tokenId, string memory uri) external onlyOwner {\n INFT721(nftContract).setTokenURI(tokenId, uri);\n }\n\n function setBaseURI(string memory baseURI) external onlyOwner {\n INFT721(nftContract).setBaseURI(baseURI);\n }\n\n function parkTokenIds(uint256 toTokenId) external onlyOwner {\n INFT721(nftContract).parkTokenIds(toTokenId);\n }\n\n function mint(\n address to,\n uint256 tokenId,\n bytes calldata data\n ) external {\n require(msg.sender == owner() || isMinter[msg.sender], \"LEVX: FORBIDDEN\");\n\n INFT721(nftContract).mint(to, tokenId, data);\n }\n\n function mintBatch(\n address to,\n uint256[] calldata tokenIds,\n bytes calldata data\n ) external {\n require(msg.sender == owner() || isMinter[msg.sender], \"LEVX: FORBIDDEN\");\n\n INFT721(nftContract).mintBatch(to, tokenIds, data);\n }\n\n function add(\n bytes32 slug,\n address signer,\n uint64 deadline,\n uint256 fromTokenId,\n uint256 maxTokenId\n ) external onlyOwner {\n Airdrop storage airdrop = airdrops[slug];\n require(airdrop.signer == address(0), \"LEVX: ADDED\");\n\n airdrop.signer = signer;\n airdrop.deadline = deadline;\n airdrop.nextTokenId = fromTokenId;\n airdrop.maxTokenId = maxTokenId;\n\n emit Add(slug, signer, deadline, fromTokenId, maxTokenId);\n }\n\n function claim(\n bytes32 slug,\n bytes32 id,\n uint256 tokenId,\n uint256 price,\n uint8 v,\n bytes32 r,\n bytes32 s,\n address to,\n bytes calldata data\n ) external {\n Airdrop storage airdrop = airdrops[slug];\n {\n (address signer, uint64 deadline) = (airdrop.signer, airdrop.deadline);\n\n require(signer != address(0), \"LEVX: INVALID_SLUG\");\n require(deadline == 0 || uint64(block.timestamp) < deadline, \"LEVX: EXPIRED\");\n require(!_minted[slug][id], \"LEVX: MINTED\");\n\n bytes32 message = keccak256(abi.encodePacked(slug, id, tokenId, price));\n require(ECDSA.recover(ECDSA.toEthSignedMessageHash(message), v, r, s) == signer, \"LEVX: UNAUTHORIZED\");\n }\n\n {\n (uint256 nextTokenId, uint256 maxTokenId) = (airdrop.nextTokenId, airdrop.maxTokenId);\n\n if (tokenId == 0) {\n tokenId = nextTokenId;\n while (tokenId < maxTokenId) {\n if (INFT721(nftContract).ownerOf(tokenId) == address(0)) {\n break;\n }\n tokenId++;\n }\n require(tokenId < maxTokenId, \"LEVX: INVALID_TOKEN_ID\");\n airdrop.nextTokenId = tokenId + 1;\n } else {\n require(tokenId >= nextTokenId && tokenId < maxTokenId, \"LEVX: INVALID_TOKEN_ID\");\n }\n }\n\n _minted[slug][id] = true;\n\n emit Claim(slug, id, to, tokenId, price);\n if (price > 0) IERC20(levx).safeTransferFrom(msg.sender, wallet, price);\n INFT721(nftContract).mint(to, tokenId, data);\n }\n}\n" }, "@openzeppelin/contracts/utils/cryptography/ECDSA.sol": { "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.5.0) (utils/cryptography/ECDSA.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../Strings.sol\";\n\n/**\n * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.\n *\n * These functions can be used to verify that a message was signed by the holder\n * of the private keys of a given address.\n */\nlibrary ECDSA {\n enum RecoverError {\n NoError,\n InvalidSignature,\n InvalidSignatureLength,\n InvalidSignatureS,\n InvalidSignatureV\n }\n\n function _throwError(RecoverError error) private pure {\n if (error == RecoverError.NoError) {\n return; // no error: do nothing\n } else if (error == RecoverError.InvalidSignature) {\n revert(\"ECDSA: invalid signature\");\n } else if (error == RecoverError.InvalidSignatureLength) {\n revert(\"ECDSA: invalid signature length\");\n } else if (error == RecoverError.InvalidSignatureS) {\n revert(\"ECDSA: invalid signature 's' value\");\n } else if (error == RecoverError.InvalidSignatureV) {\n revert(\"ECDSA: invalid signature 'v' value\");\n }\n }\n\n /**\n * @dev Returns the address that signed a hashed message (`hash`) with\n * `signature` or error string. This address can then be used for verification purposes.\n *\n * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:\n * this function rejects them by requiring the `s` value to be in the lower\n * half order, and the `v` value to be either 27 or 28.\n *\n * IMPORTANT: `hash` _must_ be the result of a hash operation for the\n * verification to be secure: it is possible to craft signatures that\n * recover to arbitrary addresses for non-hashed data. A safe way to ensure\n * this is by receiving a hash of the original message (which may otherwise\n * be too long), and then calling {toEthSignedMessageHash} on it.\n *\n * Documentation for signature generation:\n * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]\n * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]\n *\n * _Available since v4.3._\n */\n function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {\n // Check the signature length\n // - case 65: r,s,v signature (standard)\n // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._\n if (signature.length == 65) {\n bytes32 r;\n bytes32 s;\n uint8 v;\n // ecrecover takes the signature parameters, and the only way to get them\n // currently is to use assembly.\n assembly {\n r := mload(add(signature, 0x20))\n s := mload(add(signature, 0x40))\n v := byte(0, mload(add(signature, 0x60)))\n }\n return tryRecover(hash, v, r, s);\n } else if (signature.length == 64) {\n bytes32 r;\n bytes32 vs;\n // ecrecover takes the signature parameters, and the only way to get them\n // currently is to use assembly.\n assembly {\n r := mload(add(signature, 0x20))\n vs := mload(add(signature, 0x40))\n }\n return tryRecover(hash, r, vs);\n } else {\n return (address(0), RecoverError.InvalidSignatureLength);\n }\n }\n\n /**\n * @dev Returns the address that signed a hashed message (`hash`) with\n * `signature`. This address can then be used for verification purposes.\n *\n * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:\n * this function rejects them by requiring the `s` value to be in the lower\n * half order, and the `v` value to be either 27 or 28.\n *\n * IMPORTANT: `hash` _must_ be the result of a hash operation for the\n * verification to be secure: it is possible to craft signatures that\n * recover to arbitrary addresses for non-hashed data. A safe way to ensure\n * this is by receiving a hash of the original message (which may otherwise\n * be too long), and then calling {toEthSignedMessageHash} on it.\n */\n function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {\n (address recovered, RecoverError error) = tryRecover(hash, signature);\n _throwError(error);\n return recovered;\n }\n\n /**\n * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.\n *\n * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]\n *\n * _Available since v4.3._\n */\n function tryRecover(\n bytes32 hash,\n bytes32 r,\n bytes32 vs\n ) internal pure returns (address, RecoverError) {\n bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);\n uint8 v = uint8((uint256(vs) >> 255) + 27);\n return tryRecover(hash, v, r, s);\n }\n\n /**\n * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.\n *\n * _Available since v4.2._\n */\n function recover(\n bytes32 hash,\n bytes32 r,\n bytes32 vs\n ) internal pure returns (address) {\n (address recovered, RecoverError error) = tryRecover(hash, r, vs);\n _throwError(error);\n return recovered;\n }\n\n /**\n * @dev Overload of {ECDSA-tryRecover} that receives the `v`,\n * `r` and `s` signature fields separately.\n *\n * _Available since v4.3._\n */\n function tryRecover(\n bytes32 hash,\n uint8 v,\n bytes32 r,\n bytes32 s\n ) internal pure returns (address, RecoverError) {\n // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature\n // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines\n // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most\n // signatures from current libraries generate a unique signature with an s-value in the lower half order.\n //\n // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value\n // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or\n // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept\n // these malleable signatures as well.\n if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {\n return (address(0), RecoverError.InvalidSignatureS);\n }\n if (v != 27 && v != 28) {\n return (address(0), RecoverError.InvalidSignatureV);\n }\n\n // If the signature is valid (and not malleable), return the signer address\n address signer = ecrecover(hash, v, r, s);\n if (signer == address(0)) {\n return (address(0), RecoverError.InvalidSignature);\n }\n\n return (signer, RecoverError.NoError);\n }\n\n /**\n * @dev Overload of {ECDSA-recover} that receives the `v`,\n * `r` and `s` signature fields separately.\n */\n function recover(\n bytes32 hash,\n uint8 v,\n bytes32 r,\n bytes32 s\n ) internal pure returns (address) {\n (address recovered, RecoverError error) = tryRecover(hash, v, r, s);\n _throwError(error);\n return recovered;\n }\n\n /**\n * @dev Returns an Ethereum Signed Message, created from a `hash`. This\n * produces hash corresponding to the one signed with the\n * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]\n * JSON-RPC method as part of EIP-191.\n *\n * See {recover}.\n */\n function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {\n // 32 is the length in bytes of hash,\n // enforced by the type signature above\n return keccak256(abi.encodePacked(\"\\x19Ethereum Signed Message:\\n32\", hash));\n }\n\n /**\n * @dev Returns an Ethereum Signed Message, created from `s`. This\n * produces hash corresponding to the one signed with the\n * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]\n * JSON-RPC method as part of EIP-191.\n *\n * See {recover}.\n */\n function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {\n return keccak256(abi.encodePacked(\"\\x19Ethereum Signed Message:\\n\", Strings.toString(s.length), s));\n }\n\n /**\n * @dev Returns an Ethereum Signed Typed Data, created from a\n * `domainSeparator` and a `structHash`. This produces hash corresponding\n * to the one signed with the\n * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]\n * JSON-RPC method as part of EIP-712.\n *\n * See {recover}.\n */\n function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {\n return keccak256(abi.encodePacked(\"\\x19\\x01\", domainSeparator, structHash));\n }\n}\n" }, "@shoyunft/contracts/contracts/interfaces/INFT721.sol": { "content": "// SPDX-License-Identifier: MIT\n\npragma solidity >=0.5.0;\n\nimport \"./IBaseNFT721.sol\";\nimport \"./IBaseExchange.sol\";\n\ninterface INFT721 is IBaseNFT721, IBaseExchange {\n event SetRoyaltyFeeRecipient(address recipient);\n event SetRoyaltyFee(uint8 fee);\n\n function initialize(\n address _owner,\n string calldata _name,\n string calldata _symbol,\n uint256[] calldata tokenIds,\n address royaltyFeeRecipient,\n uint8 royaltyFee\n ) external;\n\n function initialize(\n address _owner,\n string calldata _name,\n string calldata _symbol,\n uint256 toTokenId,\n address royaltyFeeRecipient,\n uint8 royaltyFee\n ) external;\n\n function DOMAIN_SEPARATOR() external view override(IBaseNFT721, IBaseExchange) returns (bytes32);\n\n function factory() external view override(IBaseNFT721, IBaseExchange) returns (address);\n\n function setRoyaltyFeeRecipient(address _royaltyFeeRecipient) external;\n\n function setRoyaltyFee(uint8 _royaltyFee) external;\n}\n" }, "@openzeppelin/contracts/utils/Strings.sol": { "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev String operations.\n */\nlibrary Strings {\n bytes16 private constant _HEX_SYMBOLS = \"0123456789abcdef\";\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 // Inspired by OraclizeAPI's implementation - MIT licence\n // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol\n\n if (value == 0) {\n return \"0\";\n }\n uint256 temp = value;\n uint256 digits;\n while (temp != 0) {\n digits++;\n temp /= 10;\n }\n bytes memory buffer = new bytes(digits);\n while (value != 0) {\n digits -= 1;\n buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));\n value /= 10;\n }\n return string(buffer);\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 if (value == 0) {\n return \"0x00\";\n }\n uint256 temp = value;\n uint256 length = 0;\n while (temp != 0) {\n length++;\n temp >>= 8;\n }\n return toHexString(value, length);\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] = _HEX_SYMBOLS[value & 0xf];\n value >>= 4;\n }\n require(value == 0, \"Strings: hex length insufficient\");\n return string(buffer);\n }\n}\n" }, "@shoyunft/contracts/contracts/interfaces/IBaseNFT721.sol": { "content": "// SPDX-License-Identifier: MIT\n\npragma solidity >=0.5.0;\n\nimport \"@openzeppelin/contracts/token/ERC721/IERC721.sol\";\nimport \"@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol\";\n\nimport \"./IOwnable.sol\";\n\ninterface IBaseNFT721 is IERC721, IERC721Metadata, IOwnable {\n event SetTokenURI(uint256 indexed tokenId, string uri);\n event SetBaseURI(string uri);\n event ParkTokenIds(uint256 toTokenId);\n event Burn(uint256 indexed tokenId, uint256 indexed label, bytes32 data);\n\n function PERMIT_TYPEHASH() external view returns (bytes32);\n\n function PERMIT_ALL_TYPEHASH() external view returns (bytes32);\n\n function DOMAIN_SEPARATOR() external view returns (bytes32);\n\n function factory() external view returns (address);\n\n function nonces(uint256 tokenId) external view returns (uint256);\n\n function noncesForAll(address account) external view returns (uint256);\n\n function parked(uint256 tokenId) external view returns (bool);\n\n function initialize(\n string calldata name,\n string calldata symbol,\n address _owner\n ) external;\n\n function setTokenURI(uint256 id, string memory uri) external;\n\n function setBaseURI(string memory uri) external;\n\n function parkTokenIds(uint256 toTokenId) external;\n\n function mint(\n address to,\n uint256 tokenId,\n bytes calldata data\n ) external;\n\n function mintBatch(\n address to,\n uint256[] calldata tokenIds,\n bytes calldata data\n ) external;\n\n function burn(\n uint256 tokenId,\n uint256 label,\n bytes32 data\n ) external;\n\n function burnBatch(uint256[] calldata tokenIds) external;\n\n function permit(\n address spender,\n uint256 tokenId,\n uint256 deadline,\n uint8 v,\n bytes32 r,\n bytes32 s\n ) external;\n\n function permitAll(\n address owner,\n address spender,\n uint256 deadline,\n uint8 v,\n bytes32 r,\n bytes32 s\n ) external;\n}\n" }, "@shoyunft/contracts/contracts/interfaces/IBaseExchange.sol": { "content": "// SPDX-License-Identifier: MIT\n\npragma solidity >=0.5.0;\n\nimport \"../libraries/Orders.sol\";\n\ninterface IBaseExchange {\n event Cancel(bytes32 indexed hash);\n event Claim(\n bytes32 indexed hash,\n address bidder,\n uint256 amount,\n uint256 price,\n address recipient,\n address referrer\n );\n event Bid(bytes32 indexed hash, address bidder, uint256 amount, uint256 price, address recipient, address referrer);\n event UpdateApprovedBidHash(\n address indexed proxy,\n bytes32 indexed askHash,\n address indexed bidder,\n bytes32 bidHash\n );\n\n function DOMAIN_SEPARATOR() external view returns (bytes32);\n\n function factory() external view returns (address);\n\n function canTrade(address token) external view returns (bool);\n\n function bestBid(bytes32 hash)\n external\n view\n returns (\n address bidder,\n uint256 amount,\n uint256 price,\n address recipient,\n address referrer,\n uint256 blockNumber\n );\n\n function isCancelledOrClaimed(bytes32 hash) external view returns (bool);\n\n function amountFilled(bytes32 hash) external view returns (uint256);\n\n function approvedBidHash(\n address proxy,\n bytes32 askHash,\n address bidder\n ) external view returns (bytes32 bidHash);\n\n function cancel(Orders.Ask memory order) external;\n\n function updateApprovedBidHash(\n bytes32 askHash,\n address bidder,\n bytes32 bidHash\n ) external;\n\n function bid(Orders.Ask memory askOrder, Orders.Bid memory bidOrder) external returns (bool executed);\n\n function bid(\n Orders.Ask memory askOrder,\n uint256 bidAmount,\n uint256 bidPrice,\n address bidRecipient,\n address bidReferrer\n ) external returns (bool executed);\n\n function claim(Orders.Ask memory order) external;\n}\n" }, "@openzeppelin/contracts/token/ERC721/IERC721.sol": { "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (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`, 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 be 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: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.\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 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 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 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 /**\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" }, "@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" }, "@shoyunft/contracts/contracts/interfaces/IOwnable.sol": { "content": "// SPDX-License-Identifier: MIT\n\npragma solidity >=0.5.0;\n\ninterface IOwnable {\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n function owner() external view returns (address);\n\n function renounceOwnership() external;\n\n function transferOwnership(address newOwner) external;\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" }, "@shoyunft/contracts/contracts/libraries/Orders.sol": { "content": "// SPDX-License-Identifier: MIT\n\npragma solidity =0.8.3;\n\nlibrary Orders {\n // keccak256(\"Ask(address signer,address proxy,address token,uint256 tokenId,uint256 amount,address strategy,address currency,address recipient,uint256 deadline,bytes params)\")\n bytes32 internal constant ASK_TYPEHASH = 0x5fbc9a24e1532fa5245d1ec2dc5592849ae97ac5475f361b1a1f7a6e2ac9b2fd;\n // keccak256(\"Bid(bytes32 askHash,address signer,uint256 amount,uint256 price,address recipient,address referrer)\")\n bytes32 internal constant BID_TYPEHASH = 0xb98e1dc48988064e6dfb813618609d7da80a8841e5f277039788ac4b50d497b2;\n\n struct Ask {\n address signer;\n address proxy;\n address token;\n uint256 tokenId;\n uint256 amount;\n address strategy;\n address currency;\n address recipient;\n uint256 deadline;\n bytes params;\n uint8 v;\n bytes32 r;\n bytes32 s;\n }\n\n struct Bid {\n bytes32 askHash;\n address signer;\n uint256 amount;\n uint256 price;\n address recipient;\n address referrer;\n uint8 v;\n bytes32 r;\n bytes32 s;\n }\n\n function hash(Ask memory ask) internal pure returns (bytes32) {\n return\n keccak256(\n abi.encode(\n ASK_TYPEHASH,\n ask.signer,\n ask.proxy,\n ask.token,\n ask.tokenId,\n ask.amount,\n ask.strategy,\n ask.currency,\n ask.recipient,\n ask.deadline,\n keccak256(ask.params)\n )\n );\n }\n\n function hash(Bid memory bid) internal pure returns (bytes32) {\n return\n keccak256(\n abi.encode(BID_TYPEHASH, bid.askHash, bid.signer, bid.amount, bid.price, bid.recipient, bid.referrer)\n );\n }\n}\n" }, "contracts/LevxStreaming.sol": { "content": "// SPDX-License-Identifier: UNLICENSED\n\npragma solidity =0.8.3;\n\nimport \"@openzeppelin/contracts/access/Ownable.sol\";\nimport \"@openzeppelin/contracts/token/ERC20/IERC20.sol\";\nimport \"@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol\";\nimport \"@openzeppelin/contracts/utils/cryptography/ECDSA.sol\";\nimport \"@openzeppelin/contracts/utils/Address.sol\";\n\ncontract LevxStreaming is Ownable {\n using SafeERC20 for IERC20;\n using Address for address;\n\n uint256 constant STREAMING_PERIOD = 180 days;\n\n struct Stream {\n address recipient;\n uint64 startedAt;\n uint256 amount;\n uint256 claimed;\n }\n\n address public immutable levx;\n address public immutable signer;\n address public immutable wallet;\n uint64 public immutable deadline;\n mapping(bytes32 => Stream[]) public streams;\n\n event Start(bytes32 indexed id, uint256 nonce, uint256 amount, address indexed recipient);\n event Claim(bytes32 indexed id, uint256 nonce, uint256 amount, address indexed recipient);\n\n constructor(\n address _levx,\n address _signer,\n address _wallet,\n uint64 _deadline\n ) {\n levx = _levx;\n signer = _signer;\n wallet = _wallet;\n deadline = _deadline;\n }\n\n function start(\n bytes32 id,\n uint256 amount,\n uint8 v,\n bytes32 r,\n bytes32 s\n ) external {\n require(amount > 0, \"LEVX: INVALID_AMOUNT\");\n\n uint64 _now = uint64(block.timestamp);\n require(_now < deadline, \"LEVX: EXPIRED\");\n\n uint256 nonce = streams[id].length;\n bytes32 message = keccak256(abi.encodePacked(id, nonce, amount));\n require(ECDSA.recover(ECDSA.toEthSignedMessageHash(message), v, r, s) == signer, \"LEVX: UNAUTHORIZED\");\n\n Stream storage stream = streams[id].push();\n stream.recipient = msg.sender;\n stream.startedAt = _now;\n stream.amount = amount;\n\n emit Start(id, nonce, amount, msg.sender);\n\n IERC20(levx).safeTransferFrom(wallet, address(this), amount);\n }\n\n function claim(\n bytes32 id,\n uint256 nonce,\n address to,\n bytes calldata callData\n ) external {\n Stream storage stream = streams[id][nonce];\n require(stream.recipient == msg.sender, \"LEVX: FORBIDDEN\");\n\n uint256 amount = _amountReleased(stream);\n uint256 pending = amount - stream.claimed;\n stream.claimed = amount;\n\n if (to == address(0)) {\n emit Claim(id, nonce, pending, msg.sender);\n\n IERC20(levx).safeTransfer(msg.sender, pending);\n } else {\n emit Claim(id, nonce, pending, to);\n\n IERC20(levx).safeTransfer(to, pending);\n to.functionCall(callData);\n }\n }\n\n function pendingAmount(bytes32 id, uint256 index) external view returns (uint256) {\n Stream storage stream = streams[id][index];\n return _amountReleased(stream) - stream.claimed;\n }\n\n function _amountReleased(Stream storage stream) internal view returns (uint256) {\n uint256 duration = block.timestamp - stream.startedAt;\n if (duration > STREAMING_PERIOD) duration = STREAMING_PERIOD;\n return (stream.amount * duration) / STREAMING_PERIOD;\n }\n}\n" }, "contracts/SecondLevxStreaming.sol": { "content": "// SPDX-License-Identifier: UNLICENSED\n\npragma solidity =0.8.3;\n\nimport \"./LevxStreaming.sol\";\n\ncontract SecondLevxStreaming is LevxStreaming {\n constructor(\n address _levx,\n address _signer,\n address _wallet,\n uint64 _deadline\n ) LevxStreaming(_levx, _signer, _wallet, _deadline) {}\n}\n" }, "contracts/LevxPayout.sol": { "content": "// SPDX-License-Identifier: UNLICENSED\n\npragma solidity =0.8.3;\n\nimport \"@openzeppelin/contracts/access/Ownable.sol\";\nimport \"@openzeppelin/contracts/token/ERC20/IERC20.sol\";\nimport \"@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol\";\nimport \"@openzeppelin/contracts/utils/Address.sol\";\n\ncontract LevxPayout is Ownable {\n using SafeERC20 for IERC20;\n using Address for address;\n\n address public immutable levx;\n\n Payout[] public payouts;\n\n struct Payout {\n address wallet;\n address recipient;\n uint32 startedAt;\n uint32 duration;\n uint32 stoppedAt;\n uint256 amount;\n uint256 claimed;\n }\n\n event Start(uint256 indexed id, address wallet, address indexed recipient, uint32 duration, uint256 amount);\n event Stop(uint256 indexed id, uint256 pendingAmount);\n event Claim(uint256 indexed id, uint256 amount, address indexed recipient);\n\n constructor(address _levx) {\n levx = _levx;\n }\n\n function start(\n address wallet,\n address recipient,\n uint32 duration,\n uint256 amount\n ) external onlyOwner {\n require(amount > 0, \"LEVX: INVALID_AMOUNT\");\n\n uint256 id = payouts.length;\n Payout storage payout = payouts.push();\n payout.wallet = wallet;\n payout.recipient = recipient;\n payout.startedAt = uint32(block.timestamp);\n payout.duration = duration;\n payout.amount = amount;\n\n emit Start(id, wallet, recipient, duration, amount);\n\n IERC20(levx).safeTransferFrom(wallet, address(this), amount);\n }\n\n function stop(uint256 id) external onlyOwner {\n Payout storage payout = payouts[id];\n require(payout.stoppedAt == 0, \"LEVX: STOPPED\");\n\n uint256 released = _amountReleased(payout);\n uint256 remaining = payout.amount - released;\n require(remaining > 0, \"LEVX: FINISHED\");\n\n payout.claimed = released;\n payout.stoppedAt = uint32(block.timestamp);\n\n uint256 pending = released - payout.claimed;\n emit Stop(id, pending);\n IERC20(levx).safeTransfer(payout.wallet, remaining);\n if (pending > 0) {\n IERC20(levx).safeTransfer(payout.recipient, pending);\n }\n }\n\n function claim(\n uint256 id,\n address to,\n bytes calldata callData\n ) external {\n Payout storage payout = payouts[id];\n require(payout.recipient == msg.sender, \"LEVX: FORBIDDEN\");\n\n uint256 released = _amountReleased(payout);\n uint256 pending = released - payout.claimed;\n payout.claimed = released;\n\n if (to == address(0)) {\n emit Claim(id, pending, msg.sender);\n\n IERC20(levx).safeTransfer(msg.sender, pending);\n } else {\n emit Claim(id, pending, to);\n\n IERC20(levx).safeTransfer(to, pending);\n to.functionCall(callData);\n }\n }\n\n function pendingAmount(uint256 id) external view returns (uint256) {\n Payout storage payout = payouts[id];\n return _amountReleased(payout) - payout.claimed;\n }\n\n function _amountReleased(Payout storage stream) internal view returns (uint256) {\n uint256 duration = block.timestamp - stream.startedAt;\n uint256 _total = uint256(stream.duration);\n if (duration >= _total) return stream.amount;\n return (stream.amount * duration) / _total;\n }\n}\n" }, "contracts/NFTAirdrops.sol": { "content": "// SPDX-License-Identifier: UNLICENSED\n\npragma solidity =0.8.3;\n\nimport \"@openzeppelin/contracts/access/Ownable.sol\";\nimport \"@openzeppelin/contracts/utils/cryptography/ECDSA.sol\";\nimport \"@shoyunft/contracts/contracts/interfaces/INFT721.sol\";\n\ncontract NFTAirdrops is Ownable {\n address public immutable nftContract;\n mapping(bytes32 => Airdrop) public airdrops;\n mapping(address => bool) public isMinter;\n mapping(bytes32 => mapping(bytes32 => bool)) internal _minted;\n uint256 internal _tokenId;\n\n struct Airdrop {\n address signer;\n uint32 deadline;\n uint32 max;\n uint32 minted;\n }\n\n event SetMinter(address account, bool indexed isMinter);\n event Add(bytes32 indexed slug, address signer, uint32 deadline, uint32 max);\n event Claim(bytes32 indexed slug, bytes32 indexed id, address indexed to, uint256 tokenId);\n\n constructor(address _nftContract, uint256 fromTokenId) {\n nftContract = _nftContract;\n _tokenId = fromTokenId;\n }\n\n function setMinter(address account, bool _isMinter) external onlyOwner {\n isMinter[account] = _isMinter;\n\n emit SetMinter(account, _isMinter);\n }\n\n function transferOwnershipOfNFTContract(address newOwner) external onlyOwner {\n INFT721(nftContract).transferOwnership(newOwner);\n }\n\n function setRoyaltyFeeRecipient(address _royaltyFeeRecipient) external onlyOwner {\n INFT721(nftContract).setRoyaltyFeeRecipient(_royaltyFeeRecipient);\n }\n\n function setRoyaltyFee(uint8 _royaltyFee) external onlyOwner {\n INFT721(nftContract).setRoyaltyFee(_royaltyFee);\n }\n\n function setTokenURI(uint256 tokenId, string memory uri) external onlyOwner {\n INFT721(nftContract).setTokenURI(tokenId, uri);\n }\n\n function setBaseURI(string memory baseURI) external onlyOwner {\n INFT721(nftContract).setBaseURI(baseURI);\n }\n\n function parkTokenIds(uint256 toTokenId) external onlyOwner {\n INFT721(nftContract).parkTokenIds(toTokenId);\n }\n\n function mint(\n address to,\n uint256 tokenId,\n bytes calldata data\n ) external {\n require(msg.sender == owner() || isMinter[msg.sender], \"LEVX: FORBIDDEN\");\n\n INFT721(nftContract).mint(to, tokenId, data);\n }\n\n function mintBatch(\n address to,\n uint256[] calldata tokenIds,\n bytes calldata data\n ) external {\n require(msg.sender == owner() || isMinter[msg.sender], \"LEVX: FORBIDDEN\");\n\n INFT721(nftContract).mintBatch(to, tokenIds, data);\n }\n\n function add(\n bytes32 slug,\n address signer,\n uint32 deadline,\n uint32 max\n ) external onlyOwner {\n Airdrop storage airdrop = airdrops[slug];\n require(airdrop.signer == address(0), \"LEVX: ADDED\");\n\n airdrop.signer = signer;\n airdrop.deadline = deadline;\n airdrop.max = max;\n\n emit Add(slug, signer, deadline, max);\n }\n\n function claim(\n bytes32 slug,\n bytes32 id,\n uint8 v,\n bytes32 r,\n bytes32 s,\n address to,\n bytes calldata data\n ) external {\n Airdrop storage airdrop = airdrops[slug];\n (address signer, uint32 deadline, uint32 max, uint32 minted) = (\n airdrop.signer,\n airdrop.deadline,\n airdrop.max,\n airdrop.minted\n );\n\n require(signer != address(0), \"LEVX: INVALID_SLUG\");\n require(deadline == 0 || uint32(block.timestamp) < deadline, \"LEVX: EXPIRED\");\n require(max == 0 || minted < max, \"LEVX: FINISHED\");\n require(!_minted[slug][id], \"LEVX: MINTED\");\n\n {\n bytes32 message = keccak256(abi.encodePacked(slug, id));\n require(ECDSA.recover(ECDSA.toEthSignedMessageHash(message), v, r, s) == signer, \"LEVX: UNAUTHORIZED\");\n }\n\n airdrop.minted = minted + 1;\n _minted[slug][id] = true;\n\n uint256 tokenId = _tokenId++;\n emit Claim(slug, id, to, tokenId);\n INFT721(nftContract).mint(to, tokenId, data);\n }\n}\n" }, "contracts/ETHAirdrop.sol": { "content": "// SPDX-License-Identifier: UNLICENSED\n\npragma solidity =0.8.3;\n\nimport \"@openzeppelin/contracts/access/Ownable.sol\";\nimport \"@openzeppelin/contracts/token/ERC20/IERC20.sol\";\nimport \"@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol\";\nimport \"./uniswapv2/interfaces/IUniswapV2Router01.sol\";\nimport \"./uniswapv2/interfaces/IUniswapV2Pair.sol\";\nimport \"./uniswapv2/interfaces/IWETH.sol\";\nimport \"./uniswapv2/libraries/UniswapV2Library.sol\";\nimport \"./MerkleProof.sol\";\n\ncontract ETHAirdrop is Ownable, MerkleProof {\n using SafeERC20 for IERC20;\n\n address public immutable levx;\n address public immutable weth;\n address public immutable router;\n mapping(bytes32 => bool) public isValidMerkleRoot;\n mapping(bytes32 => mapping(bytes32 => bool)) internal _hasClaimed;\n\n event Deposit(uint256 amount, address from);\n event Withdraw(uint256 amount, address to);\n event AddMerkleRoot(bytes32 indexed merkleRoot);\n event Claim(bytes32 indexed merkleRoot, address indexed account, uint256 amount, address to);\n\n modifier ensure(uint256 deadline) {\n require(deadline >= block.timestamp, \"LEVX: EXPIRED\");\n _;\n }\n\n constructor(\n address _owner,\n address _levx,\n address _weth,\n address _router\n ) {\n levx = _levx;\n weth = _weth;\n router = _router;\n _transferOwnership(_owner);\n }\n\n receive() external payable {\n emit Deposit(msg.value, msg.sender);\n }\n\n function withdraw(uint256 amount) external onlyOwner {\n payable(msg.sender).transfer(amount);\n\n emit Withdraw(amount, msg.sender);\n }\n\n function addMerkleRoot(bytes32 merkleRoot) external onlyOwner {\n require(!isValidMerkleRoot[merkleRoot], \"SHOYU: DUPLICATE_ROOT\");\n isValidMerkleRoot[merkleRoot] = true;\n\n emit AddMerkleRoot(merkleRoot);\n }\n\n function claim(\n bytes32 merkleRoot,\n bytes32[] calldata merkleProof,\n uint256 amount,\n address to\n ) public {\n require(isValidMerkleRoot[merkleRoot], \"SHOYU: INVALID_ROOT\");\n\n bytes32 leaf = keccak256(abi.encodePacked(msg.sender, amount));\n require(!_hasClaimed[merkleRoot][leaf], \"SHOYU: FORBIDDEN\");\n require(verify(merkleRoot, leaf, merkleProof), \"SHOYU: INVALID_PROOF\");\n\n _hasClaimed[merkleRoot][leaf] = true;\n if (to != address(this)) {\n payable(to).transfer(amount);\n }\n\n emit Claim(merkleRoot, msg.sender, amount, to);\n }\n\n function batchClaim(\n bytes32[] calldata merkleRoots,\n bytes32[][] calldata merkleProofs,\n uint256[] calldata amounts,\n address to\n ) external {\n for (uint256 i; i < merkleRoots.length; i++) {\n claim(merkleRoots[i], merkleProofs[i], amounts[i], to);\n }\n }\n\n function claimAndSwapToLevx(\n bytes32 merkleRoot,\n bytes32[] calldata merkleProof,\n uint256 amount,\n uint256 amountOutMin,\n address to,\n uint256 deadline\n ) public ensure(deadline) returns (uint256 amountOut) {\n claim(merkleRoot, merkleProof, amount, address(this));\n\n address[] memory path = new address[](2);\n path[0] = weth;\n path[1] = levx;\n uint256[] memory amounts = IUniswapV2Router01(router).swapExactETHForTokens{value: amount}(\n amountOutMin,\n path,\n to,\n deadline\n );\n amountOut = amounts[1];\n }\n\n function batchClaimAndSwapToLevx(\n bytes32[] calldata merkleRoots,\n bytes32[][] calldata merkleProofs,\n uint256[] calldata amounts,\n uint256 amountOutMin,\n address to,\n uint256 deadline\n ) public ensure(deadline) returns (uint256 amountOut) {\n uint256 amountIn;\n for (uint256 i; i < merkleRoots.length; i++) {\n uint256 amount = amounts[i];\n claim(merkleRoots[i], merkleProofs[i], amount, address(this));\n amountIn += amount;\n }\n\n address[] memory path = new address[](2);\n path[0] = weth;\n path[1] = levx;\n uint256[] memory _amounts = IUniswapV2Router01(router).swapExactETHForTokens{value: amountIn}(\n amountOutMin,\n path,\n to,\n deadline\n );\n amountOut = _amounts[1];\n }\n}\n" }, "contracts/uniswapv2/interfaces/IUniswapV2Router01.sol": { "content": "// SPDX-License-Identifier: GPL-3.0\n\npragma solidity >=0.6.2;\n\ninterface IUniswapV2Router01 {\n function factory() external pure returns (address);\n function WETH() external pure returns (address);\n\n function addLiquidity(\n address tokenA,\n address tokenB,\n uint amountADesired,\n uint amountBDesired,\n uint amountAMin,\n uint amountBMin,\n address to,\n uint deadline\n ) external returns (uint amountA, uint amountB, uint liquidity);\n function addLiquidityETH(\n address token,\n uint amountTokenDesired,\n uint amountTokenMin,\n uint amountETHMin,\n address to,\n uint deadline\n ) external payable returns (uint amountToken, uint amountETH, uint liquidity);\n function removeLiquidity(\n address tokenA,\n address tokenB,\n uint liquidity,\n uint amountAMin,\n uint amountBMin,\n address to,\n uint deadline\n ) external returns (uint amountA, uint amountB);\n function removeLiquidityETH(\n address token,\n uint liquidity,\n uint amountTokenMin,\n uint amountETHMin,\n address to,\n uint deadline\n ) external returns (uint amountToken, uint amountETH);\n function removeLiquidityWithPermit(\n address tokenA,\n address tokenB,\n uint liquidity,\n uint amountAMin,\n uint amountBMin,\n address to,\n uint deadline,\n bool approveMax, uint8 v, bytes32 r, bytes32 s\n ) external returns (uint amountA, uint amountB);\n function removeLiquidityETHWithPermit(\n address token,\n uint liquidity,\n uint amountTokenMin,\n uint amountETHMin,\n address to,\n uint deadline,\n bool approveMax, uint8 v, bytes32 r, bytes32 s\n ) external returns (uint amountToken, uint amountETH);\n function swapExactTokensForTokens(\n uint amountIn,\n uint amountOutMin,\n address[] calldata path,\n address to,\n uint deadline\n ) external returns (uint[] memory amounts);\n function swapTokensForExactTokens(\n uint amountOut,\n uint amountInMax,\n address[] calldata path,\n address to,\n uint deadline\n ) external returns (uint[] memory amounts);\n function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)\n external\n payable\n returns (uint[] memory amounts);\n function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)\n external\n returns (uint[] memory amounts);\n function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)\n external\n returns (uint[] memory amounts);\n function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)\n external\n payable\n returns (uint[] memory amounts);\n\n function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);\n function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);\n function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);\n function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);\n function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);\n}" }, "contracts/uniswapv2/interfaces/IUniswapV2Pair.sol": { "content": "// SPDX-License-Identifier: GPL-3.0\n\npragma solidity >=0.5.0;\n\ninterface IUniswapV2Pair {\n event Approval(address indexed owner, address indexed spender, uint value);\n event Transfer(address indexed from, address indexed to, uint value);\n\n function name() external pure returns (string memory);\n function symbol() external pure returns (string memory);\n function decimals() external pure returns (uint8);\n function totalSupply() external view returns (uint);\n function balanceOf(address owner) external view returns (uint);\n function allowance(address owner, address spender) external view returns (uint);\n\n function approve(address spender, uint value) external returns (bool);\n function transfer(address to, uint value) external returns (bool);\n function transferFrom(address from, address to, uint value) external returns (bool);\n\n function DOMAIN_SEPARATOR() external view returns (bytes32);\n function PERMIT_TYPEHASH() external pure returns (bytes32);\n function nonces(address owner) external view returns (uint);\n\n function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;\n\n event Mint(address indexed sender, uint amount0, uint amount1);\n event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);\n event Swap(\n address indexed sender,\n uint amount0In,\n uint amount1In,\n uint amount0Out,\n uint amount1Out,\n address indexed to\n );\n event Sync(uint112 reserve0, uint112 reserve1);\n\n function MINIMUM_LIQUIDITY() external pure returns (uint);\n function factory() external view returns (address);\n function token0() external view returns (address);\n function token1() external view returns (address);\n function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);\n function price0CumulativeLast() external view returns (uint);\n function price1CumulativeLast() external view returns (uint);\n function kLast() external view returns (uint);\n\n function mint(address to) external returns (uint liquidity);\n function burn(address to) external returns (uint amount0, uint amount1);\n function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;\n function skim(address to) external;\n function sync() external;\n\n function initialize(address, address) external;\n}" }, "contracts/uniswapv2/interfaces/IWETH.sol": { "content": "// SPDX-License-Identifier: GPL-3.0\n\npragma solidity >=0.5.0;\n\ninterface IWETH {\n function deposit() external payable;\n function transfer(address to, uint value) external returns (bool);\n function withdraw(uint) external;\n}" }, "contracts/uniswapv2/libraries/UniswapV2Library.sol": { "content": "// SPDX-License-Identifier: GPL-3.0\n\npragma solidity =0.8.3;\n\nimport \"@openzeppelin/contracts/utils/math/SafeMath.sol\";\nimport \"../interfaces/IUniswapV2Pair.sol\";\n\nlibrary UniswapV2Library {\n using SafeMath for uint256;\n\n // returns sorted token addresses, used to handle return values from pairs sorted in this order\n function sortTokens(address tokenA, address tokenB) internal pure returns (address token0, address token1) {\n require(tokenA != tokenB, \"UniswapV2Library: IDENTICAL_ADDRESSES\");\n (token0, token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);\n require(token0 != address(0), \"UniswapV2Library: ZERO_ADDRESS\");\n }\n\n // calculates the CREATE2 address for a pair without making any external calls\n function pairFor(\n address factory,\n address tokenA,\n address tokenB\n ) internal pure returns (address pair) {\n (address token0, address token1) = sortTokens(tokenA, tokenB);\n pair = address(\n uint160(\n uint256(\n keccak256(\n abi.encodePacked(\n hex\"ff\",\n factory,\n keccak256(abi.encodePacked(token0, token1)),\n hex\"e18a34eb0e04b04f7a0ac29a6e80748dca96319b42c54d679cb821dca90c6303\" // init code hash\n )\n )\n )\n )\n );\n }\n\n // fetches and sorts the reserves for a pair\n function getReserves(\n address factory,\n address tokenA,\n address tokenB\n ) internal view returns (uint256 reserveA, uint256 reserveB) {\n (address token0, ) = sortTokens(tokenA, tokenB);\n (uint256 reserve0, uint256 reserve1, ) = IUniswapV2Pair(pairFor(factory, tokenA, tokenB)).getReserves();\n (reserveA, reserveB) = tokenA == token0 ? (reserve0, reserve1) : (reserve1, reserve0);\n }\n\n // given some amount of an asset and pair reserves, returns an equivalent amount of the other asset\n function quote(\n uint256 amountA,\n uint256 reserveA,\n uint256 reserveB\n ) internal pure returns (uint256 amountB) {\n require(amountA > 0, \"UniswapV2Library: INSUFFICIENT_AMOUNT\");\n require(reserveA > 0 && reserveB > 0, \"UniswapV2Library: INSUFFICIENT_LIQUIDITY\");\n amountB = amountA.mul(reserveB) / reserveA;\n }\n\n // given an input amount of an asset and pair reserves, returns the maximum output amount of the other asset\n function getAmountOut(\n uint256 amountIn,\n uint256 reserveIn,\n uint256 reserveOut\n ) internal pure returns (uint256 amountOut) {\n require(amountIn > 0, \"UniswapV2Library: INSUFFICIENT_INPUT_AMOUNT\");\n require(reserveIn > 0 && reserveOut > 0, \"UniswapV2Library: INSUFFICIENT_LIQUIDITY\");\n uint256 amountInWithFee = amountIn.mul(997);\n uint256 numerator = amountInWithFee.mul(reserveOut);\n uint256 denominator = reserveIn.mul(1000).add(amountInWithFee);\n amountOut = numerator / denominator;\n }\n\n // given an output amount of an asset and pair reserves, returns a required input amount of the other asset\n function getAmountIn(\n uint256 amountOut,\n uint256 reserveIn,\n uint256 reserveOut\n ) internal pure returns (uint256 amountIn) {\n require(amountOut > 0, \"UniswapV2Library: INSUFFICIENT_OUTPUT_AMOUNT\");\n require(reserveIn > 0 && reserveOut > 0, \"UniswapV2Library: INSUFFICIENT_LIQUIDITY\");\n uint256 numerator = reserveIn.mul(amountOut).mul(1000);\n uint256 denominator = reserveOut.sub(amountOut).mul(997);\n amountIn = (numerator / denominator).add(1);\n }\n\n // performs chained getAmountOut calculations on any number of pairs\n function getAmountsOut(\n address factory,\n uint256 amountIn,\n address[] memory path\n ) internal view returns (uint256[] memory amounts) {\n require(path.length >= 2, \"UniswapV2Library: INVALID_PATH\");\n amounts = new uint256[](path.length);\n amounts[0] = amountIn;\n for (uint256 i; i < path.length - 1; i++) {\n (uint256 reserveIn, uint256 reserveOut) = getReserves(factory, path[i], path[i + 1]);\n amounts[i + 1] = getAmountOut(amounts[i], reserveIn, reserveOut);\n }\n }\n\n // performs chained getAmountIn calculations on any number of pairs\n function getAmountsIn(\n address factory,\n uint256 amountOut,\n address[] memory path\n ) internal view returns (uint256[] memory amounts) {\n require(path.length >= 2, \"UniswapV2Library: INVALID_PATH\");\n amounts = new uint256[](path.length);\n amounts[amounts.length - 1] = amountOut;\n for (uint256 i = path.length - 1; i > 0; i--) {\n (uint256 reserveIn, uint256 reserveOut) = getReserves(factory, path[i - 1], path[i]);\n amounts[i - 1] = getAmountIn(amounts[i], reserveIn, reserveOut);\n }\n }\n}\n" }, "@openzeppelin/contracts/utils/math/SafeMath.sol": { "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/math/SafeMath.sol)\n\npragma solidity ^0.8.0;\n\n// CAUTION\n// This version of SafeMath should only be used with Solidity 0.8 or later,\n// because it relies on the compiler's built in overflow checks.\n\n/**\n * @dev Wrappers over Solidity's arithmetic operations.\n *\n * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler\n * now has built in overflow checking.\n */\nlibrary SafeMath {\n /**\n * @dev Returns the addition of two unsigned integers, with an overflow flag.\n *\n * _Available since v3.4._\n */\n function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n unchecked {\n uint256 c = a + b;\n if (c < a) return (false, 0);\n return (true, c);\n }\n }\n\n /**\n * @dev Returns the substraction of two unsigned integers, with an overflow flag.\n *\n * _Available since v3.4._\n */\n function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n unchecked {\n if (b > a) return (false, 0);\n return (true, a - b);\n }\n }\n\n /**\n * @dev Returns the multiplication of two unsigned integers, with an overflow flag.\n *\n * _Available since v3.4._\n */\n function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n unchecked {\n // Gas optimization: this is cheaper than requiring 'a' not being zero, but the\n // benefit is lost if 'b' is also tested.\n // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522\n if (a == 0) return (true, 0);\n uint256 c = a * b;\n if (c / a != b) return (false, 0);\n return (true, c);\n }\n }\n\n /**\n * @dev Returns the division of two unsigned integers, with a division by zero flag.\n *\n * _Available since v3.4._\n */\n function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n unchecked {\n if (b == 0) return (false, 0);\n return (true, a / b);\n }\n }\n\n /**\n * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.\n *\n * _Available since v3.4._\n */\n function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n unchecked {\n if (b == 0) return (false, 0);\n return (true, a % b);\n }\n }\n\n /**\n * @dev Returns the addition of two unsigned integers, reverting on\n * overflow.\n *\n * Counterpart to Solidity's `+` operator.\n *\n * Requirements:\n *\n * - Addition cannot overflow.\n */\n function add(uint256 a, uint256 b) internal pure returns (uint256) {\n return a + b;\n }\n\n /**\n * @dev Returns the subtraction of two unsigned integers, reverting on\n * overflow (when the result is negative).\n *\n * Counterpart to Solidity's `-` operator.\n *\n * Requirements:\n *\n * - Subtraction cannot overflow.\n */\n function sub(uint256 a, uint256 b) internal pure returns (uint256) {\n return a - b;\n }\n\n /**\n * @dev Returns the multiplication of two unsigned integers, reverting on\n * overflow.\n *\n * Counterpart to Solidity's `*` operator.\n *\n * Requirements:\n *\n * - Multiplication cannot overflow.\n */\n function mul(uint256 a, uint256 b) internal pure returns (uint256) {\n return a * b;\n }\n\n /**\n * @dev Returns the integer division of two unsigned integers, reverting on\n * division by zero. The result is rounded towards zero.\n *\n * Counterpart to Solidity's `/` operator.\n *\n * Requirements:\n *\n * - The divisor cannot be zero.\n */\n function div(uint256 a, uint256 b) internal pure returns (uint256) {\n return a / b;\n }\n\n /**\n * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),\n * reverting when dividing by zero.\n *\n * Counterpart to Solidity's `%` operator. This function uses a `revert`\n * opcode (which leaves remaining gas untouched) while Solidity uses an\n * invalid opcode to revert (consuming all remaining gas).\n *\n * Requirements:\n *\n * - The divisor cannot be zero.\n */\n function mod(uint256 a, uint256 b) internal pure returns (uint256) {\n return a % b;\n }\n\n /**\n * @dev Returns the subtraction of two unsigned integers, reverting with custom message on\n * overflow (when the result is negative).\n *\n * CAUTION: This function is deprecated because it requires allocating memory for the error\n * message unnecessarily. For custom revert reasons use {trySub}.\n *\n * Counterpart to Solidity's `-` operator.\n *\n * Requirements:\n *\n * - Subtraction cannot overflow.\n */\n function sub(\n uint256 a,\n uint256 b,\n string memory errorMessage\n ) internal pure returns (uint256) {\n unchecked {\n require(b <= a, errorMessage);\n return a - b;\n }\n }\n\n /**\n * @dev Returns the integer division of two unsigned integers, reverting with custom message on\n * division by zero. The result is rounded towards zero.\n *\n * Counterpart to Solidity's `/` operator. Note: this function uses a\n * `revert` opcode (which leaves remaining gas untouched) while Solidity\n * uses an invalid opcode to revert (consuming all remaining gas).\n *\n * Requirements:\n *\n * - The divisor cannot be zero.\n */\n function div(\n uint256 a,\n uint256 b,\n string memory errorMessage\n ) internal pure returns (uint256) {\n unchecked {\n require(b > 0, errorMessage);\n return a / b;\n }\n }\n\n /**\n * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),\n * reverting with custom message when dividing by zero.\n *\n * CAUTION: This function is deprecated because it requires allocating memory for the error\n * message unnecessarily. For custom revert reasons use {tryMod}.\n *\n * Counterpart to Solidity's `%` operator. This function uses a `revert`\n * opcode (which leaves remaining gas untouched) while Solidity uses an\n * invalid opcode to revert (consuming all remaining gas).\n *\n * Requirements:\n *\n * - The divisor cannot be zero.\n */\n function mod(\n uint256 a,\n uint256 b,\n string memory errorMessage\n ) internal pure returns (uint256) {\n unchecked {\n require(b > 0, errorMessage);\n return a % b;\n }\n }\n}\n" }, "contracts/uniswapv2/interfaces/IUniswapV2Router02.sol": { "content": "// SPDX-License-Identifier: GPL-3.0\n\npragma solidity >=0.6.2;\n\nimport './IUniswapV2Router01.sol';\n\ninterface IUniswapV2Router02 is IUniswapV2Router01 {\n function removeLiquidityETHSupportingFeeOnTransferTokens(\n address token,\n uint liquidity,\n uint amountTokenMin,\n uint amountETHMin,\n address to,\n uint deadline\n ) external returns (uint amountETH);\n function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(\n address token,\n uint liquidity,\n uint amountTokenMin,\n uint amountETHMin,\n address to,\n uint deadline,\n bool approveMax, uint8 v, bytes32 r, bytes32 s\n ) external returns (uint amountETH);\n\n function swapExactTokensForTokensSupportingFeeOnTransferTokens(\n uint amountIn,\n uint amountOutMin,\n address[] calldata path,\n address to,\n uint deadline\n ) external;\n function swapExactETHForTokensSupportingFeeOnTransferTokens(\n uint amountOutMin,\n address[] calldata path,\n address to,\n uint deadline\n ) external payable;\n function swapExactTokensForETHSupportingFeeOnTransferTokens(\n uint amountIn,\n uint amountOutMin,\n address[] calldata path,\n address to,\n uint deadline\n ) external;\n}" } }, "settings": { "optimizer": { "enabled": true, "runs": 200 }, "outputSelection": { "*": { "*": [ "abi", "evm.bytecode", "evm.deployedBytecode", "evm.methodIdentifiers", "metadata", "devdoc", "userdoc", "storageLayout", "evm.gasEstimates" ], "": [ "ast" ] } }, "metadata": { "useLiteralContent": true }, "libraries": { "": { "__CACHE_BREAKER__": "0x00000000d41867734bbee4c6863d9255b2b06ac1" } } } }