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/** *Submitted for verification at Etherscan.io on 2022-05-01 */ // File: @openzeppelin/contracts/utils/Strings.sol // OpenZeppelin Contracts v4.4.1 (utils/Strings.sol) pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); while (value != 0) { digits -= 1; buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); value /= 10; } return string(buffer); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0x00"; } uint256 temp = value; uint256 length = 0; while (temp != 0) { length++; temp >>= 8; } return toHexString(value, length); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _HEX_SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } } // File: @openzeppelin/contracts/utils/Address.sol // OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } // File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol) pragma solidity ^0.8.0; /** * @title ERC721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC721 asset contracts. */ interface IERC721Receiver { /** * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} * by `operator` from `from`, this function is called. * * It must return its Solidity selector to confirm the token transfer. * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted. * * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`. */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); } // File: @openzeppelin/contracts/utils/introspection/IERC165.sol // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); } // File: @openzeppelin/contracts/utils/introspection/ERC165.sol // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } } // File: @openzeppelin/contracts/token/ERC721/IERC721.sol // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721.sol) pragma solidity ^0.8.0; /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes calldata data ) external; /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); } // File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol // OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol) pragma solidity ^0.8.0; /** * @title ERC-721 Non-Fungible Token Standard, optional metadata extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Metadata is IERC721 { /** * @dev Returns the token collection name. */ function name() external view returns (string memory); /** * @dev Returns the token collection symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token. */ function tokenURI(uint256 tokenId) external view returns (string memory); } // File: @openzeppelin/contracts/utils/Context.sol // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } } // File: erc721a/contracts/ERC721A.sol // Creator: Chiru Labs pragma solidity ^0.8.4; error ApprovalCallerNotOwnerNorApproved(); error ApprovalQueryForNonexistentToken(); error ApproveToCaller(); error ApprovalToCurrentOwner(); error BalanceQueryForZeroAddress(); error MintToZeroAddress(); error MintZeroQuantity(); error OwnerQueryForNonexistentToken(); error TransferCallerNotOwnerNorApproved(); error TransferFromIncorrectOwner(); error TransferToNonERC721ReceiverImplementer(); error TransferToZeroAddress(); error URIQueryForNonexistentToken(); /** * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including * the Metadata extension. Built to optimize for lower gas during batch mints. * * Assumes serials are sequentially minted starting at _startTokenId() (defaults to 0, e.g. 0, 1, 2, 3..). * * Assumes that an owner cannot have more than 2**64 - 1 (max value of uint64) of supply. * * Assumes that the maximum token id cannot exceed 2**256 - 1 (max value of uint256). */ contract ERC721A is Context, ERC165, IERC721, IERC721Metadata { using Address for address; using Strings for uint256; // Compiler will pack this into a single 256bit word. struct TokenOwnership { // The address of the owner. address addr; // Keeps track of the start time of ownership with minimal overhead for tokenomics. uint64 startTimestamp; // Whether the token has been burned. bool burned; } // Compiler will pack this into a single 256bit word. struct AddressData { // Realistically, 2**64-1 is more than enough. uint64 balance; // Keeps track of mint count with minimal overhead for tokenomics. uint64 numberMinted; // Keeps track of burn count with minimal overhead for tokenomics. uint64 numberBurned; // For miscellaneous variable(s) pertaining to the address // (e.g. number of whitelist mint slots used). // If there are multiple variables, please pack them into a uint64. uint64 aux; } // The tokenId of the next token to be minted. uint256 internal _currentIndex; // The number of tokens burned. uint256 internal _burnCounter; // Token name string private _name; // Token symbol string private _symbol; // Mapping from token ID to ownership details // An empty struct value does not necessarily mean the token is unowned. See _ownershipOf implementation for details. mapping(uint256 => TokenOwnership) internal _ownerships; // Mapping owner address to address data mapping(address => AddressData) private _addressData; // Mapping from token ID to approved address mapping(uint256 => address) private _tokenApprovals; // Mapping from owner to operator approvals mapping(address => mapping(address => bool)) private _operatorApprovals; constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; _currentIndex = _startTokenId(); } /** * To change the starting tokenId, please override this function. */ function _startTokenId() internal view virtual returns (uint256) { return 0; } /** * @dev Burned tokens are calculated here, use _totalMinted() if you want to count just minted tokens. */ function totalSupply() public view returns (uint256) { // Counter underflow is impossible as _burnCounter cannot be incremented // more than _currentIndex - _startTokenId() times unchecked { return _currentIndex - _burnCounter - _startTokenId(); } } /** * Returns the total amount of tokens minted in the contract. */ function _totalMinted() internal view returns (uint256) { // Counter underflow is impossible as _currentIndex does not decrement, // and it is initialized to _startTokenId() unchecked { return _currentIndex - _startTokenId(); } } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) { return interfaceId == type(IERC721).interfaceId || interfaceId == type(IERC721Metadata).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC721-balanceOf}. */ function balanceOf(address owner) public view override returns (uint256) { if (owner == address(0)) revert BalanceQueryForZeroAddress(); return uint256(_addressData[owner].balance); } /** * Returns the number of tokens minted by `owner`. */ function _numberMinted(address owner) internal view returns (uint256) { return uint256(_addressData[owner].numberMinted); } /** * Returns the number of tokens burned by or on behalf of `owner`. */ function _numberBurned(address owner) internal view returns (uint256) { return uint256(_addressData[owner].numberBurned); } /** * Returns the auxillary data for `owner`. (e.g. number of whitelist mint slots used). */ function _getAux(address owner) internal view returns (uint64) { return _addressData[owner].aux; } /** * Sets the auxillary data for `owner`. (e.g. number of whitelist mint slots used). * If there are multiple variables, please pack them into a uint64. */ function _setAux(address owner, uint64 aux) internal { _addressData[owner].aux = aux; } /** * Gas spent here starts off proportional to the maximum mint batch size. * It gradually moves to O(1) as tokens get transferred around in the collection over time. */ function _ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) { uint256 curr = tokenId; unchecked { if (_startTokenId() <= curr && curr < _currentIndex) { TokenOwnership memory ownership = _ownerships[curr]; if (!ownership.burned) { if (ownership.addr != address(0)) { return ownership; } // Invariant: // There will always be an ownership that has an address and is not burned // before an ownership that does not have an address and is not burned. // Hence, curr will not underflow. while (true) { curr--; ownership = _ownerships[curr]; if (ownership.addr != address(0)) { return ownership; } } } } } revert OwnerQueryForNonexistentToken(); } /** * @dev See {IERC721-ownerOf}. */ function ownerOf(uint256 tokenId) public view override returns (address) { return _ownershipOf(tokenId).addr; } /** * @dev See {IERC721Metadata-name}. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev See {IERC721Metadata-symbol}. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev See {IERC721Metadata-tokenURI}. */ function tokenURI(uint256 tokenId) public view virtual override returns (string memory) { if (!_exists(tokenId)) revert URIQueryForNonexistentToken(); string memory baseURI = _baseURI(); return bytes(baseURI).length != 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : ''; } /** * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each * token will be the concatenation of the `baseURI` and the `tokenId`. Empty * by default, can be overriden in child contracts. */ function _baseURI() internal view virtual returns (string memory) { return ''; } /** * @dev See {IERC721-approve}. */ function approve(address to, uint256 tokenId) public override { address owner = ERC721A.ownerOf(tokenId); if (to == owner) revert ApprovalToCurrentOwner(); if (_msgSender() != owner && !isApprovedForAll(owner, _msgSender())) { revert ApprovalCallerNotOwnerNorApproved(); } _approve(to, tokenId, owner); } /** * @dev See {IERC721-getApproved}. */ function getApproved(uint256 tokenId) public view override returns (address) { if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken(); return _tokenApprovals[tokenId]; } /** * @dev See {IERC721-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public virtual override { if (operator == _msgSender()) revert ApproveToCaller(); _operatorApprovals[_msgSender()][operator] = approved; emit ApprovalForAll(_msgSender(), operator, approved); } /** * @dev See {IERC721-isApprovedForAll}. */ function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) { return _operatorApprovals[owner][operator]; } /** * @dev See {IERC721-transferFrom}. */ function transferFrom( address from, address to, uint256 tokenId ) public virtual override { _transfer(from, to, tokenId); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId ) public virtual override { safeTransferFrom(from, to, tokenId, ''); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes memory _data ) public virtual override { _transfer(from, to, tokenId); if (to.isContract() && !_checkContractOnERC721Received(from, to, tokenId, _data)) { revert TransferToNonERC721ReceiverImplementer(); } } /** * @dev Returns whether `tokenId` exists. * * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}. * * Tokens start existing when they are minted (`_mint`), */ function _exists(uint256 tokenId) internal view returns (bool) { return _startTokenId() <= tokenId && tokenId < _currentIndex && !_ownerships[tokenId].burned; } function _safeMint(address to, uint256 quantity) internal { _safeMint(to, quantity, ''); } /** * @dev Safely mints `quantity` tokens and transfers them to `to`. * * Requirements: * * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called for each safe transfer. * - `quantity` must be greater than 0. * * Emits a {Transfer} event. */ function _safeMint( address to, uint256 quantity, bytes memory _data ) internal { _mint(to, quantity, _data, true); } /** * @dev Mints `quantity` tokens and transfers them to `to`. * * Requirements: * * - `to` cannot be the zero address. * - `quantity` must be greater than 0. * * Emits a {Transfer} event. */ function _mint( address to, uint256 quantity, bytes memory _data, bool safe ) internal { uint256 startTokenId = _currentIndex; if (to == address(0)) revert MintToZeroAddress(); if (quantity == 0) revert MintZeroQuantity(); _beforeTokenTransfers(address(0), to, startTokenId, quantity); // Overflows are incredibly unrealistic. // balance or numberMinted overflow if current value of either + quantity > 1.8e19 (2**64) - 1 // updatedIndex overflows if _currentIndex + quantity > 1.2e77 (2**256) - 1 unchecked { _addressData[to].balance += uint64(quantity); _addressData[to].numberMinted += uint64(quantity); _ownerships[startTokenId].addr = to; _ownerships[startTokenId].startTimestamp = uint64(block.timestamp); uint256 updatedIndex = startTokenId; uint256 end = updatedIndex + quantity; if (safe && to.isContract()) { do { emit Transfer(address(0), to, updatedIndex); if (!_checkContractOnERC721Received(address(0), to, updatedIndex++, _data)) { revert TransferToNonERC721ReceiverImplementer(); } } while (updatedIndex != end); // Reentrancy protection if (_currentIndex != startTokenId) revert(); } else { do { emit Transfer(address(0), to, updatedIndex++); } while (updatedIndex != end); } _currentIndex = updatedIndex; } _afterTokenTransfers(address(0), to, startTokenId, quantity); } /** * @dev Transfers `tokenId` from `from` to `to`. * * Requirements: * * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * * Emits a {Transfer} event. */ function _transfer( address from, address to, uint256 tokenId ) private { TokenOwnership memory prevOwnership = _ownershipOf(tokenId); if (prevOwnership.addr != from) revert TransferFromIncorrectOwner(); bool isApprovedOrOwner = (_msgSender() == from || isApprovedForAll(from, _msgSender()) || getApproved(tokenId) == _msgSender()); if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved(); if (to == address(0)) revert TransferToZeroAddress(); _beforeTokenTransfers(from, to, tokenId, 1); // Clear approvals from the previous owner _approve(address(0), tokenId, from); // Underflow of the sender's balance is impossible because we check for // ownership above and the recipient's balance can't realistically overflow. // Counter overflow is incredibly unrealistic as tokenId would have to be 2**256. unchecked { _addressData[from].balance -= 1; _addressData[to].balance += 1; TokenOwnership storage currSlot = _ownerships[tokenId]; currSlot.addr = to; currSlot.startTimestamp = uint64(block.timestamp); // If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it. // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls. uint256 nextTokenId = tokenId + 1; TokenOwnership storage nextSlot = _ownerships[nextTokenId]; if (nextSlot.addr == address(0)) { // This will suffice for checking _exists(nextTokenId), // as a burned slot cannot contain the zero address. if (nextTokenId != _currentIndex) { nextSlot.addr = from; nextSlot.startTimestamp = prevOwnership.startTimestamp; } } } emit Transfer(from, to, tokenId); _afterTokenTransfers(from, to, tokenId, 1); } /** * @dev This is equivalent to _burn(tokenId, false) */ function _burn(uint256 tokenId) internal virtual { _burn(tokenId, false); } /** * @dev Destroys `tokenId`. * The approval is cleared when the token is burned. * * Requirements: * * - `tokenId` must exist. * * Emits a {Transfer} event. */ function _burn(uint256 tokenId, bool approvalCheck) internal virtual { TokenOwnership memory prevOwnership = _ownershipOf(tokenId); address from = prevOwnership.addr; if (approvalCheck) { bool isApprovedOrOwner = (_msgSender() == from || isApprovedForAll(from, _msgSender()) || getApproved(tokenId) == _msgSender()); if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved(); } _beforeTokenTransfers(from, address(0), tokenId, 1); // Clear approvals from the previous owner _approve(address(0), tokenId, from); // Underflow of the sender's balance is impossible because we check for // ownership above and the recipient's balance can't realistically overflow. // Counter overflow is incredibly unrealistic as tokenId would have to be 2**256. unchecked { AddressData storage addressData = _addressData[from]; addressData.balance -= 1; addressData.numberBurned += 1; // Keep track of who burned the token, and the timestamp of burning. TokenOwnership storage currSlot = _ownerships[tokenId]; currSlot.addr = from; currSlot.startTimestamp = uint64(block.timestamp); currSlot.burned = true; // If the ownership slot of tokenId+1 is not explicitly set, that means the burn initiator owns it. // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls. uint256 nextTokenId = tokenId + 1; TokenOwnership storage nextSlot = _ownerships[nextTokenId]; if (nextSlot.addr == address(0)) { // This will suffice for checking _exists(nextTokenId), // as a burned slot cannot contain the zero address. if (nextTokenId != _currentIndex) { nextSlot.addr = from; nextSlot.startTimestamp = prevOwnership.startTimestamp; } } } emit Transfer(from, address(0), tokenId); _afterTokenTransfers(from, address(0), tokenId, 1); // Overflow not possible, as _burnCounter cannot be exceed _currentIndex times. unchecked { _burnCounter++; } } /** * @dev Approve `to` to operate on `tokenId` * * Emits a {Approval} event. */ function _approve( address to, uint256 tokenId, address owner ) private { _tokenApprovals[tokenId] = to; emit Approval(owner, to, tokenId); } /** * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target contract. * * @param from address representing the previous owner of the given token ID * @param to target address that will receive the tokens * @param tokenId uint256 ID of the token to be transferred * @param _data bytes optional data to send along with the call * @return bool whether the call correctly returned the expected magic value */ function _checkContractOnERC721Received( address from, address to, uint256 tokenId, bytes memory _data ) private returns (bool) { try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) { return retval == IERC721Receiver(to).onERC721Received.selector; } catch (bytes memory reason) { if (reason.length == 0) { revert TransferToNonERC721ReceiverImplementer(); } else { assembly { revert(add(32, reason), mload(reason)) } } } } /** * @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting. * And also called before burning one token. * * startTokenId - the first token id to be transferred * quantity - the amount to be transferred * * Calling conditions: * * - When `from` and `to` are both non-zero, `from`'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. * - When `to` is zero, `tokenId` will be burned by `from`. * - `from` and `to` are never both zero. */ function _beforeTokenTransfers( address from, address to, uint256 startTokenId, uint256 quantity ) internal virtual {} /** * @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes * minting. * And also called after one token has been burned. * * startTokenId - the first token id to be transferred * quantity - the amount to be transferred * * Calling conditions: * * - When `from` and `to` are both non-zero, `from`'s `tokenId` has been * transferred to `to`. * - When `from` is zero, `tokenId` has been minted for `to`. * - When `to` is zero, `tokenId` has been burned by `from`. * - `from` and `to` are never both zero. */ function _afterTokenTransfers( address from, address to, uint256 startTokenId, uint256 quantity ) internal virtual {} } // File: @openzeppelin/contracts/access/Ownable.sol // OpenZeppelin Contracts v4.4.1 (access/Ownable.sol) pragma solidity ^0.8.0; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(owner() == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } } // File: The Fucking Banana.sol pragma solidity ^0.8.4; /** ███╗ ██╗███████╗████████╗██╗ ██╗██╗███╗ ██╗ ██████╗ ███╗ ███╗ █████╗ ██╗ ██╗███████╗██████╗ ██████╗ ██████╗ ███╗ ███╗ ████╗ ██║██╔════╝╚══██╔══╝██║ ██╔╝██║█S███╗ ██║██╔════╝ ████╗ ████║██╔══██╗██║ ██╔╝██╔════╝██╔══██╗ ██╔════╝██╔═══██╗████╗ ████║ ██╔██╗ ██║█████╗ ██║ █████╔╝ ██║██╔██╗ ██║██║ ███╗██╔████╔██║███████║█████╔╝ █████╗ ██████╔╝ ██║ ██║ ██║██╔████╔██║ ██║╚██╗██║██╔══╝ ██║ ██╔═██╗ ██║██║╚██╗██║██║ ██║██║╚██╔╝██║██╔══██║██╔═██╗ ██╔══╝ ██╔══██╗ ██║ ██║ ██║██║╚██╔╝██║ ██║ ╚████║██║ ██║ ██║ ██╗██║██║ ╚████║╚██████╔╝██║ ╚═╝ ██║██║ ██║██║ ██╗███████╗██║ ██║██╗╚██████╗╚██████╔╝██║ ╚═╝ ██║ ╚═╝ ╚═══╝╚═╝ ╚═╝ ╚═╝ ╚═╝╚═╝╚═╝ ╚═══╝ ╚═════╝ ╚═╝ ╚═╝╚═╝ ╚═╝╚═╝ ╚═╝╚══════╝╚═╝ ╚═╝╚═╝ ╚═════╝ ╚═════╝ ╚═╝ ╚═╝ */ contract thefuckingbanana is ERC721A, Ownable{ using Strings for uint256; // Set variables uint256 public TFB_SUPPLY = 6969; uint256 public TFB_PRICE = 0.05 ether; uint256 public Presale_PRICE = 0.03 ether; bool private _saleActive = false; bool private _presaleActive = false; uint256 public constant presale_supply = 1000; address ownerr= 0xa9595b5909d5ce5ca5df771F2BE56677F7e8C1F2; address dev= 0xfB935E62FB26b58dE4C9f7FE94a22874d23585eE; string public _metaBaseUri = "https://thefuckingbanana.com/tokens/"; // Public Functions constructor() ERC721A("The Fucking Banana", "TFB") { } function PUBLICSALEMINT(uint16 numberOfTokens) public payable { require(_saleActive==true, "TFB sale not active"); require(totalSupply() + numberOfTokens <= TFB_SUPPLY, "Sold Out"); require((TFB_PRICE *numberOfTokens) <= msg.value, "Ether amount sent is incorrect"); _safeMint(msg.sender,numberOfTokens); } function PRESALEMINT(uint16 numberOfTokens) public payable { require(_presaleActive==true, "Presale Of TFB is not active"); require(totalSupply()+numberOfTokens <= presale_supply, "Insufficient supply, Try in public sale"); require((Presale_PRICE *numberOfTokens) <= msg.value, "Ether amount sent is incorrect"); _safeMint(msg.sender, numberOfTokens); } function mintgiveaway(address notforyou , uint16 numberOfTokens) public onlyOwner { _safeMint(notforyou, numberOfTokens); } function isSaleActive() public view returns (bool) { return _saleActive; } function ispreSaleActive() public view returns (bool) { return _presaleActive; } function tokenURI(uint256 tokenId) override public view returns (string memory) { return string(abi.encodePacked(_baseURI(), "", uint256(tokenId).toString())); } // Owner Functions function Changesalestatus() public onlyOwner { _saleActive = !_saleActive; } function changedevaddr(address addr) public onlyOwner { dev = addr; } function changeowneraddr(address addr) public onlyOwner { ownerr = addr; } function Changepresalestatus() public onlyOwner { _presaleActive = !_presaleActive; } function setMetaBaseURI(string memory baseURI) external onlyOwner { _metaBaseUri = baseURI; } function setsupply(uint256 _TFBupply ) external onlyOwner { TFB_SUPPLY = _TFBupply; } function withdrawAll() external onlyOwner { uint256 _85percent = address(this).balance*85/100; uint256 _15percent = address(this).balance*15/100; require(payable(dev).send(_15percent)); require(payable(ownerr).send(_85percent)); } // Internal Functions function _baseURI() override internal view returns (string memory) { return _metaBaseUri; } // The following functions are overrides required by Solidity. }
True
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/** *Submitted for verification at Etherscan.io on 2021-05-05 */ // File: openzeppelin-solidity/contracts/token/ERC20/ERC20Basic.sol pragma solidity ^0.4.24; /** * @title ERC20Basic * @dev Simpler version of ERC20 interface * See https://github.com/ethereum/EIPs/issues/179 */ contract ERC20Basic { function totalSupply() public view returns (uint256); function balanceOf(address _who) public view returns (uint256); function transfer(address _to, uint256 _value) public returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); } // File: openzeppelin-solidity/contracts/math/SafeMath.sol pragma solidity ^0.4.24; /** * @title SafeMath * @dev Math operations with safety checks that throw on error */ library SafeMath { /** * @dev Multiplies two numbers, throws on overflow. */ function mul(uint256 _a, uint256 _b) internal pure returns (uint256 c) { // Gas optimization: this is cheaper than asserting 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522 if (_a == 0) { return 0; } c = _a * _b; assert(c / _a == _b); return c; } /** * @dev Integer division of two numbers, truncating the quotient. */ function div(uint256 _a, uint256 _b) internal pure returns (uint256) { // assert(_b > 0); // Solidity automatically throws when dividing by 0 // uint256 c = _a / _b; // assert(_a == _b * c + _a % _b); // There is no case in which this doesn't hold return _a / _b; } /** * @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend). */ function sub(uint256 _a, uint256 _b) internal pure returns (uint256) { assert(_b <= _a); return _a - _b; } /** * @dev Adds two numbers, throws on overflow. */ function add(uint256 _a, uint256 _b) internal pure returns (uint256 c) { c = _a + _b; assert(c >= _a); return c; } } // File: openzeppelin-solidity/contracts/token/ERC20/BasicToken.sol pragma solidity ^0.4.24; /** * @title Basic token * @dev Basic version of StandardToken, with no allowances. */ contract BasicToken is ERC20Basic { using SafeMath for uint256; mapping(address => uint256) internal balances; uint256 internal totalSupply_; /** * @dev Total number of tokens in existence */ function totalSupply() public view returns (uint256) { return totalSupply_; } /** * @dev Transfer token for a specified address * @param _to The address to transfer to. * @param _value The amount to be transferred. */ function transfer(address _to, uint256 _value) public returns (bool) { require(_value <= balances[msg.sender]); require(_to != address(0)); balances[msg.sender] = balances[msg.sender].sub(_value); balances[_to] = balances[_to].add(_value); emit Transfer(msg.sender, _to, _value); return true; } /** * @dev Gets the balance of the specified address. * @param _owner The address to query the the balance of. * @return An uint256 representing the amount owned by the passed address. */ function balanceOf(address _owner) public view returns (uint256) { return balances[_owner]; } } // File: openzeppelin-solidity/contracts/token/ERC20/BurnableToken.sol pragma solidity ^0.4.24; /** * @title Burnable Token * @dev Token that can be irreversibly burned (destroyed). */ contract BurnableToken is BasicToken { event Burn(address indexed burner, uint256 value); /** * @dev Burns a specific amount of tokens. * @param _value The amount of token to be burned. */ function burn(uint256 _value) public { _burn(msg.sender, _value); } function _burn(address _who, uint256 _value) internal { require(_value <= balances[_who]); // no need to require value <= totalSupply, since that would imply the // sender's balance is greater than the totalSupply, which *should* be an assertion failure balances[_who] = balances[_who].sub(_value); totalSupply_ = totalSupply_.sub(_value); emit Burn(_who, _value); emit Transfer(_who, address(0), _value); } } // File: openzeppelin-solidity/contracts/token/ERC20/ERC20.sol pragma solidity ^0.4.24; /** * @title ERC20 interface * @dev see https://github.com/ethereum/EIPs/issues/20 */ contract ERC20 is ERC20Basic { function allowance(address _owner, address _spender) public view returns (uint256); function transferFrom(address _from, address _to, uint256 _value) public returns (bool); function approve(address _spender, uint256 _value) public returns (bool); event Approval( address indexed owner, address indexed spender, uint256 value ); } // File: openzeppelin-solidity/contracts/token/ERC20/StandardToken.sol pragma solidity ^0.4.24; /** * @title Standard ERC20 token * * @dev Implementation of the basic standard token. * https://github.com/ethereum/EIPs/issues/20 * Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol */ contract StandardToken is ERC20, BasicToken { mapping (address => mapping (address => uint256)) internal allowed; /** * @dev Transfer tokens from one address to another * @param _from address The address which you want to send tokens from * @param _to address The address which you want to transfer to * @param _value uint256 the amount of tokens to be transferred */ function transferFrom( address _from, address _to, uint256 _value ) public returns (bool) { require(_value <= balances[_from]); require(_value <= allowed[_from][msg.sender]); require(_to != address(0)); balances[_from] = balances[_from].sub(_value); balances[_to] = balances[_to].add(_value); allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value); emit Transfer(_from, _to, _value); return true; } /** * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender. * Beware that changing an allowance with this method brings the risk that someone may use both the old * and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this * race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * @param _spender The address which will spend the funds. * @param _value The amount of tokens to be spent. */ function approve(address _spender, uint256 _value) public returns (bool) { allowed[msg.sender][_spender] = _value; emit Approval(msg.sender, _spender, _value); return true; } /** * @dev Function to check the amount of tokens that an owner allowed to a spender. * @param _owner address The address which owns the funds. * @param _spender address The address which will spend the funds. * @return A uint256 specifying the amount of tokens still available for the spender. */ function allowance( address _owner, address _spender ) public view returns (uint256) { return allowed[_owner][_spender]; } /** * @dev Increase the amount of tokens that an owner allowed to a spender. * approve should be called when allowed[_spender] == 0. To increment * allowed value is better to use this function to avoid 2 calls (and wait until * the first transaction is mined) * From MonolithDAO Token.sol * @param _spender The address which will spend the funds. * @param _addedValue The amount of tokens to increase the allowance by. */ function increaseApproval( address _spender, uint256 _addedValue ) public returns (bool) { allowed[msg.sender][_spender] = ( allowed[msg.sender][_spender].add(_addedValue)); emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]); return true; } /** * @dev Decrease the amount of tokens that an owner allowed to a spender. * approve should be called when allowed[_spender] == 0. To decrement * allowed value is better to use this function to avoid 2 calls (and wait until * the first transaction is mined) * From MonolithDAO Token.sol * @param _spender The address which will spend the funds. * @param _subtractedValue The amount of tokens to decrease the allowance by. */ function decreaseApproval( address _spender, uint256 _subtractedValue ) public returns (bool) { uint256 oldValue = allowed[msg.sender][_spender]; if (_subtractedValue >= oldValue) { allowed[msg.sender][_spender] = 0; } else { allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue); } emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]); return true; } } // File: openzeppelin-solidity/contracts/ownership/Ownable.sol pragma solidity ^0.4.24; /** * @title Ownable * @dev The Ownable contract has an owner address, and provides basic authorization control * functions, this simplifies the implementation of "user permissions". */ contract Ownable { address public owner; event OwnershipRenounced(address indexed previousOwner); event OwnershipTransferred( address indexed previousOwner, address indexed newOwner ); /** * @dev The Ownable constructor sets the original `owner` of the contract to the sender * account. */ constructor() public { owner = msg.sender; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(msg.sender == owner); _; } /** * @dev Allows the current owner to relinquish control of the contract. * @notice Renouncing to ownership will leave the contract without an owner. * It will not be possible to call the functions with the `onlyOwner` * modifier anymore. */ function renounceOwnership() public onlyOwner { emit OwnershipRenounced(owner); owner = address(0); } /** * @dev Allows the current owner to transfer control of the contract to a newOwner. * @param _newOwner The address to transfer ownership to. */ function transferOwnership(address _newOwner) public onlyOwner { _transferOwnership(_newOwner); } /** * @dev Transfers control of the contract to a newOwner. * @param _newOwner The address to transfer ownership to. */ function _transferOwnership(address _newOwner) internal { require(_newOwner != address(0)); emit OwnershipTransferred(owner, _newOwner); owner = _newOwner; } } // File: openzeppelin-solidity/contracts/token/ERC20/MintableToken.sol pragma solidity ^0.4.24; /** * @title Mintable token * @dev Simple ERC20 Token example, with mintable token creation * Based on code by TokenMarketNet: https://github.com/TokenMarketNet/ico/blob/master/contracts/MintableToken.sol */ contract MintableToken is StandardToken, Ownable { event Mint(address indexed to, uint256 amount); event MintFinished(); bool public mintingFinished = false; modifier canMint() { require(!mintingFinished); _; } modifier hasMintPermission() { require(msg.sender == owner); _; } /** * @dev Function to mint tokens * @param _to The address that will receive the minted tokens. * @param _amount The amount of tokens to mint. * @return A boolean that indicates if the operation was successful. */ function mint( address _to, uint256 _amount ) public hasMintPermission canMint returns (bool) { totalSupply_ = totalSupply_.add(_amount); balances[_to] = balances[_to].add(_amount); emit Mint(_to, _amount); emit Transfer(address(0), _to, _amount); return true; } /** * @dev Function to stop minting new tokens. * @return True if the operation was successful. */ function finishMinting() public onlyOwner canMint returns (bool) { mintingFinished = true; emit MintFinished(); return true; } } // File: openzeppelin-solidity/contracts/token/ERC20/DetailedERC20.sol pragma solidity ^0.4.24; /** * @title DetailedERC20 token * @dev The decimals are only for visualization purposes. * All the operations are done using the smallest and indivisible token unit, * just as on Ethereum all the operations are done in wei. */ contract DetailedERC20 is ERC20 { string public name; string public symbol; uint8 public decimals; constructor(string _name, string _symbol, uint8 _decimals) public { name = _name; symbol = _symbol; decimals = _decimals; } } // File: openzeppelin-solidity/contracts/AddressUtils.sol pragma solidity ^0.4.24; /** * Utility library of inline functions on addresses */ library AddressUtils { /** * Returns whether the target address is a contract * @dev This function will return false if invoked during the constructor of a contract, * as the code is not actually created until after the constructor finishes. * @param _addr address to check * @return whether the target address is a contract */ function isContract(address _addr) internal view returns (bool) { uint256 size; // XXX Currently there is no better way to check if there is a contract in an address // than to check the size of the code at that address. // See https://ethereum.stackexchange.com/a/14016/36603 // for more details about how this works. // TODO Check this again before the Serenity release, because all addresses will be // contracts then. // solium-disable-next-line security/no-inline-assembly assembly { size := extcodesize(_addr) } return size > 0; } } // File: contracts/interfaces/ERC677.sol pragma solidity 0.4.24; contract ERC677 is ERC20 { event Transfer(address indexed from, address indexed to, uint256 value, bytes data); function transferAndCall(address, uint256, bytes) external returns (bool); function increaseAllowance(address spender, uint256 addedValue) public returns (bool); function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool); } contract LegacyERC20 { function transfer(address _spender, uint256 _value) public; // returns (bool); function transferFrom(address _owner, address _spender, uint256 _value) public; // returns (bool); } // File: contracts/interfaces/IBurnableMintableERC677Token.sol pragma solidity 0.4.24; contract IBurnableMintableERC677Token is ERC677 { function mint(address _to, uint256 _amount) public returns (bool); function burn(uint256 _value) public; function claimTokens(address _token, address _to) external; } // File: contracts/upgradeable_contracts/Sacrifice.sol pragma solidity 0.4.24; contract Sacrifice { constructor(address _recipient) public payable { selfdestruct(_recipient); } } // File: contracts/libraries/Address.sol pragma solidity 0.4.24; /** * @title Address * @dev Helper methods for Address type. */ library Address { /** * @dev Try to send native tokens to the address. If it fails, it will force the transfer by creating a selfdestruct contract * @param _receiver address that will receive the native tokens * @param _value the amount of native tokens to send */ function safeSendValue(address _receiver, uint256 _value) internal { if (!_receiver.send(_value)) { (new Sacrifice).value(_value)(_receiver); } } } // File: contracts/libraries/SafeERC20.sol pragma solidity 0.4.24; /** * @title SafeERC20 * @dev Helper methods for safe token transfers. * Functions perform additional checks to be sure that token transfer really happened. */ library SafeERC20 { using SafeMath for uint256; /** * @dev Same as ERC20.transfer(address,uint256) but with extra consistency checks. * @param _token address of the token contract * @param _to address of the receiver * @param _value amount of tokens to send */ function safeTransfer(address _token, address _to, uint256 _value) internal { LegacyERC20(_token).transfer(_to, _value); assembly { if returndatasize { returndatacopy(0, 0, 32) if iszero(mload(0)) { revert(0, 0) } } } } /** * @dev Same as ERC20.transferFrom(address,address,uint256) but with extra consistency checks. * @param _token address of the token contract * @param _from address of the sender * @param _value amount of tokens to send */ function safeTransferFrom(address _token, address _from, uint256 _value) internal { LegacyERC20(_token).transferFrom(_from, address(this), _value); assembly { if returndatasize { returndatacopy(0, 0, 32) if iszero(mload(0)) { revert(0, 0) } } } } } // File: contracts/upgradeable_contracts/Claimable.sol pragma solidity 0.4.24; /** * @title Claimable * @dev Implementation of the claiming utils that can be useful for withdrawing accidentally sent tokens that are not used in bridge operations. */ contract Claimable { using SafeERC20 for address; /** * Throws if a given address is equal to address(0) */ modifier validAddress(address _to) { require(_to != address(0)); /* solcov ignore next */ _; } /** * @dev Withdraws the erc20 tokens or native coins from this contract. * Caller should additionally check that the claimed token is not a part of bridge operations (i.e. that token != erc20token()). * @param _token address of the claimed token or address(0) for native coins. * @param _to address of the tokens/coins receiver. */ function claimValues(address _token, address _to) internal validAddress(_to) { if (_token == address(0)) { claimNativeCoins(_to); } else { claimErc20Tokens(_token, _to); } } /** * @dev Internal function for withdrawing all native coins from the contract. * @param _to address of the coins receiver. */ function claimNativeCoins(address _to) internal { uint256 value = address(this).balance; Address.safeSendValue(_to, value); } /** * @dev Internal function for withdrawing all tokens of ssome particular ERC20 contract from this contract. * @param _token address of the claimed ERC20 token. * @param _to address of the tokens receiver. */ function claimErc20Tokens(address _token, address _to) internal { ERC20Basic token = ERC20Basic(_token); uint256 balance = token.balanceOf(this); _token.safeTransfer(_to, balance); } } // File: contracts/ERC677BridgeToken.sol pragma solidity 0.4.24; /** * @title ERC677BridgeToken * @dev The basic implementation of a bridgeable ERC677-compatible token */ contract ERC677BridgeToken is IBurnableMintableERC677Token, DetailedERC20, BurnableToken, MintableToken, Claimable { bytes4 internal constant ON_TOKEN_TRANSFER = 0xa4c0ed36; // onTokenTransfer(address,uint256,bytes) address internal bridgeContractAddr; constructor(string _name, string _symbol, uint8 _decimals) public DetailedERC20(_name, _symbol, _decimals) { // solhint-disable-previous-line no-empty-blocks } function bridgeContract() external view returns (address) { return bridgeContractAddr; } function setBridgeContract(address _bridgeContract) external onlyOwner { require(AddressUtils.isContract(_bridgeContract)); bridgeContractAddr = _bridgeContract; } modifier validRecipient(address _recipient) { require(_recipient != address(0) && _recipient != address(this)); /* solcov ignore next */ _; } function transferAndCall(address _to, uint256 _value, bytes _data) external validRecipient(_to) returns (bool) { require(superTransfer(_to, _value)); emit Transfer(msg.sender, _to, _value, _data); if (AddressUtils.isContract(_to)) { require(contractFallback(msg.sender, _to, _value, _data)); } return true; } function getTokenInterfacesVersion() external pure returns (uint64 major, uint64 minor, uint64 patch) { return (2, 4, 0); } function superTransfer(address _to, uint256 _value) internal returns (bool) { return super.transfer(_to, _value); } function transfer(address _to, uint256 _value) public returns (bool) { require(superTransfer(_to, _value)); callAfterTransfer(msg.sender, _to, _value); return true; } function transferFrom(address _from, address _to, uint256 _value) public returns (bool) { require(super.transferFrom(_from, _to, _value)); callAfterTransfer(_from, _to, _value); return true; } /** * @dev Internal function that calls onTokenTransfer callback on the receiver after the successful transfer. * Since it is not present in the original ERC677 standard, the callback is only called on the bridge contract, * in order to simplify UX. In other cases, this token complies with the ERC677/ERC20 standard. * @param _from tokens sender address. * @param _to tokens receiver address. * @param _value amount of sent tokens. */ function callAfterTransfer(address _from, address _to, uint256 _value) internal { if (isBridge(_to)) { require(contractFallback(_from, _to, _value, new bytes(0))); } } function isBridge(address _address) public view returns (bool) { return _address == bridgeContractAddr; } /** * @dev call onTokenTransfer fallback on the token recipient contract * @param _from tokens sender * @param _to tokens recipient * @param _value amount of tokens that was sent * @param _data set of extra bytes that can be passed to the recipient */ function contractFallback(address _from, address _to, uint256 _value, bytes _data) private returns (bool) { return _to.call(abi.encodeWithSelector(ON_TOKEN_TRANSFER, _from, _value, _data)); } function finishMinting() public returns (bool) { revert(); } function renounceOwnership() public onlyOwner { revert(); } /** * @dev Withdraws the erc20 tokens or native coins from this contract. * @param _token address of the claimed token or address(0) for native coins. * @param _to address of the tokens/coins receiver. */ function claimTokens(address _token, address _to) external onlyOwner { claimValues(_token, _to); } function increaseAllowance(address spender, uint256 addedValue) public returns (bool) { return super.increaseApproval(spender, addedValue); } function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) { return super.decreaseApproval(spender, subtractedValue); } } // File: contracts/PermittableToken.sol pragma solidity 0.4.24; contract PermittableToken is ERC677BridgeToken { string public constant version = "1"; // EIP712 niceties bytes32 public DOMAIN_SEPARATOR; // bytes32 public constant PERMIT_TYPEHASH = keccak256("Permit(address holder,address spender,uint256 nonce,uint256 expiry,bool allowed)"); bytes32 public constant PERMIT_TYPEHASH = 0xea2aa0a1be11a07ed86d755c93467f4f82362b452371d1ba94d1715123511acb; mapping(address => uint256) public nonces; mapping(address => mapping(address => uint256)) public expirations; constructor(string memory _name, string memory _symbol, uint8 _decimals, uint256 _chainId) public ERC677BridgeToken(_name, _symbol, _decimals) { require(_chainId != 0); DOMAIN_SEPARATOR = keccak256( abi.encode( keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"), keccak256(bytes(_name)), keccak256(bytes(version)), _chainId, address(this) ) ); } /// @dev transferFrom in this contract works in a slightly different form than the generic /// transferFrom function. This contract allows for "unlimited approval". /// Should the user approve an address for the maximum uint256 value, /// then that address will have unlimited approval until told otherwise. /// @param _sender The address of the sender. /// @param _recipient The address of the recipient. /// @param _amount The value to transfer. /// @return Success status. function transferFrom(address _sender, address _recipient, uint256 _amount) public returns (bool) { require(_sender != address(0)); require(_recipient != address(0)); balances[_sender] = balances[_sender].sub(_amount); balances[_recipient] = balances[_recipient].add(_amount); emit Transfer(_sender, _recipient, _amount); if (_sender != msg.sender) { uint256 allowedAmount = allowance(_sender, msg.sender); if (allowedAmount != uint256(-1)) { // If allowance is limited, adjust it. // In this case `transferFrom` works like the generic allowed[_sender][msg.sender] = allowedAmount.sub(_amount); emit Approval(_sender, msg.sender, allowed[_sender][msg.sender]); } else { // If allowance is unlimited by `permit`, `approve`, or `increaseAllowance` // function, don't adjust it. But the expiration date must be empty or in the future require(expirations[_sender][msg.sender] == 0 || expirations[_sender][msg.sender] >= _now()); } } else { // If `_sender` is `msg.sender`, // the function works just like `transfer()` } callAfterTransfer(_sender, _recipient, _amount); return true; } /// @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender. /// @param _to The address which will spend the funds. /// @param _value The amount of tokens to be spent. function approve(address _to, uint256 _value) public returns (bool result) { result = super.approve(_to, _value); if (_value == uint256(-1)) { delete expirations[msg.sender][_to]; } } /// @dev Atomically increases the allowance granted to spender by the caller. /// @param _to The address which will spend the funds. /// @param _addedValue The amount of tokens to increase the allowance by. function increaseAllowance(address _to, uint256 _addedValue) public returns (bool result) { result = super.increaseAllowance(_to, _addedValue); if (allowed[msg.sender][_to] == uint256(-1)) { delete expirations[msg.sender][_to]; } } /// @dev An alias for `transfer` function. /// @param _to The address of the recipient. /// @param _amount The value to transfer. function push(address _to, uint256 _amount) public { transferFrom(msg.sender, _to, _amount); } /// @dev Makes a request to transfer the specified amount /// from the specified address to the caller's address. /// @param _from The address of the holder. /// @param _amount The value to transfer. function pull(address _from, uint256 _amount) public { transferFrom(_from, msg.sender, _amount); } /// @dev An alias for `transferFrom` function. /// @param _from The address of the sender. /// @param _to The address of the recipient. /// @param _amount The value to transfer. function move(address _from, address _to, uint256 _amount) public { transferFrom(_from, _to, _amount); } /// @dev Allows to spend holder's unlimited amount by the specified spender. /// The function can be called by anyone, but requires having allowance parameters /// signed by the holder according to EIP712. /// @param _holder The holder's address. /// @param _spender The spender's address. /// @param _nonce The nonce taken from `nonces(_holder)` public getter. /// @param _expiry The allowance expiration date (unix timestamp in UTC). /// Can be zero for no expiration. Forced to zero if `_allowed` is `false`. /// Note that timestamps are not precise, malicious miner/validator can manipulate them to some extend. /// Assume that there can be a 900 seconds time delta between the desired timestamp and the actual expiration. /// @param _allowed True to enable unlimited allowance for the spender by the holder. False to disable. /// @param _v A final byte of signature (ECDSA component). /// @param _r The first 32 bytes of signature (ECDSA component). /// @param _s The second 32 bytes of signature (ECDSA component). function permit( address _holder, address _spender, uint256 _nonce, uint256 _expiry, bool _allowed, uint8 _v, bytes32 _r, bytes32 _s ) external { require(_holder != address(0)); require(_spender != address(0)); require(_expiry == 0 || _now() <= _expiry); require(_v == 27 || _v == 28); require(uint256(_s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0); bytes32 digest = keccak256( abi.encodePacked( "\x19\x01", DOMAIN_SEPARATOR, keccak256(abi.encode(PERMIT_TYPEHASH, _holder, _spender, _nonce, _expiry, _allowed)) ) ); require(_holder == ecrecover(digest, _v, _r, _s)); require(_nonce == nonces[_holder]++); uint256 amount = _allowed ? uint256(-1) : 0; allowed[_holder][_spender] = amount; expirations[_holder][_spender] = _allowed ? _expiry : 0; emit Approval(_holder, _spender, amount); } function _now() internal view returns (uint256) { return now; } }
True
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/** *Submitted for verification at Etherscan.io on 2021-12-11 */ // Sources flattened with hardhat v2.1.1 https://hardhat.org // File contracts/Interfaces/IPriceFeed.sol // SPDX-License-Identifier: MIT pragma solidity 0.6.11; interface IPriceFeed { // --- Events --- event LastGoodPriceUpdated(uint _lastGoodPrice); // --- Function --- function fetchPrice() external returns (uint); } // File contracts/Interfaces/ILiquityBase.sol interface ILiquityBase { function priceFeed() external view returns (IPriceFeed); } // File contracts/Interfaces/IStabilityPool.sol /* * The Stability Pool holds LUSD tokens deposited by Stability Pool depositors. * * When a trove is liquidated, then depending on system conditions, some of its LUSD debt gets offset with * LUSD in the Stability Pool: that is, the offset debt evaporates, and an equal amount of LUSD tokens in the Stability Pool is burned. * * Thus, a liquidation causes each depositor to receive a LUSD loss, in proportion to their deposit as a share of total deposits. * They also receive an ETH gain, as the ETH collateral of the liquidated trove is distributed among Stability depositors, * in the same proportion. * * When a liquidation occurs, it depletes every deposit by the same fraction: for example, a liquidation that depletes 40% * of the total LUSD in the Stability Pool, depletes 40% of each deposit. * * A deposit that has experienced a series of liquidations is termed a "compounded deposit": each liquidation depletes the deposit, * multiplying it by some factor in range ]0,1[ * * Please see the implementation spec in the proof document, which closely follows on from the compounded deposit / ETH gain derivations: * https://github.com/liquity/liquity/blob/master/papers/Scalable_Reward_Distribution_with_Compounding_Stakes.pdf * * --- LQTY ISSUANCE TO STABILITY POOL DEPOSITORS --- * * An LQTY issuance event occurs at every deposit operation, and every liquidation. * * Each deposit is tagged with the address of the front end through which it was made. * * All deposits earn a share of the issued LQTY in proportion to the deposit as a share of total deposits. The LQTY earned * by a given deposit, is split between the depositor and the front end through which the deposit was made, based on the front end's kickbackRate. * * Please see the system Readme for an overview: * https://github.com/liquity/dev/blob/main/README.md#lqty-issuance-to-stability-providers */ interface IStabilityPool { // --- Events --- event StabilityPoolETHBalanceUpdated(uint _newBalance); event StabilityPoolLUSDBalanceUpdated(uint _newBalance); event BorrowerOperationsAddressChanged(address _newBorrowerOperationsAddress); event TroveManagerAddressChanged(address _newTroveManagerAddress); event ActivePoolAddressChanged(address _newActivePoolAddress); event DefaultPoolAddressChanged(address _newDefaultPoolAddress); event LUSDTokenAddressChanged(address _newLUSDTokenAddress); event CollAddressChanged(address _collTokenAddress); event SortedTrovesAddressChanged(address _newSortedTrovesAddress); event PriceFeedAddressChanged(address _newPriceFeedAddress); event CommunityIssuanceAddressChanged(address _newCommunityIssuanceAddress); event P_Updated(uint _P); event S_Updated(uint _S, uint128 _epoch, uint128 _scale); event G_Updated(uint _G, uint128 _epoch, uint128 _scale); event EpochUpdated(uint128 _currentEpoch); event ScaleUpdated(uint128 _currentScale); event FrontEndRegistered(address indexed _frontEnd, uint _kickbackRate); event FrontEndTagSet(address indexed _depositor, address indexed _frontEnd); event DepositSnapshotUpdated(address indexed _depositor, uint _P, uint _S, uint _G); event FrontEndSnapshotUpdated(address indexed _frontEnd, uint _P, uint _G); event UserDepositChanged(address indexed _depositor, uint _newDeposit); event FrontEndStakeChanged(address indexed _frontEnd, uint _newFrontEndStake, address _depositor); event ETHGainWithdrawn(address indexed _depositor, uint _ETH, uint _LUSDLoss); event LQTYPaidToDepositor(address indexed _depositor, uint _LQTY); event LQTYPaidToFrontEnd(address indexed _frontEnd, uint _LQTY); event EtherSent(address _to, uint _amount); // --- Functions --- /* * Called only once on init, to set addresses of other Liquity contracts * Callable only by owner, renounces ownership at the end */ function setAddresses( address _borrowerOperationsAddress, address _troveManagerAddress, address _activePoolAddress, address _LUSDTokenAddress, address _sortedTrovesAddress, address _priceFeedAddress, address _communityIssuanceAddress, address _collTokenAddress, uint _collDecimalAdjustment ) external; /* * Initial checks: * - Frontend is registered or zero address * - Sender is not a registered frontend * - _amount is not zero * --- * - Triggers a LQTY issuance, based on time passed since the last issuance. The LQTY issuance is shared between *all* depositors and front ends * - Tags the deposit with the provided front end tag param, if it's a new deposit * - Sends depositor's accumulated gains (LQTY, ETH) to depositor * - Sends the tagged front end's accumulated LQTY gains to the tagged front end * - Increases deposit and tagged front end's stake, and takes new snapshots for each. */ function provideToSP(uint _amount, address _frontEndTag) external; /* * Initial checks: * - _amount is zero or there are no under collateralized troves left in the system * - User has a non zero deposit * --- * - Triggers a LQTY issuance, based on time passed since the last issuance. The LQTY issuance is shared between *all* depositors and front ends * - Removes the deposit's front end tag if it is a full withdrawal * - Sends all depositor's accumulated gains (LQTY, ETH) to depositor * - Sends the tagged front end's accumulated LQTY gains to the tagged front end * - Decreases deposit and tagged front end's stake, and takes new snapshots for each. * * If _amount > userDeposit, the user withdraws all of their compounded deposit. */ function withdrawFromSP(uint _amount) external; /* * Initial checks: * - User has a non zero deposit * - User has an open trove * - User has some ETH gain * --- * - Triggers a LQTY issuance, based on time passed since the last issuance. The LQTY issuance is shared between *all* depositors and front ends * - Sends all depositor's LQTY gain to depositor * - Sends all tagged front end's LQTY gain to the tagged front end * - Transfers the depositor's entire ETH gain from the Stability Pool to the caller's trove * - Leaves their compounded deposit in the Stability Pool * - Updates snapshots for deposit and tagged front end stake */ function withdrawETHGainToTrove(address _upperHint, address _lowerHint) external; /* * Initial checks: * - Frontend (sender) not already registered * - User (sender) has no deposit * - _kickbackRate is in the range [0, 100%] * --- * Front end makes a one-time selection of kickback rate upon registering */ function registerFrontEnd(uint _kickbackRate) external; /* * Initial checks: * - Caller is TroveManager * --- * Cancels out the specified debt against the LUSD contained in the Stability Pool (as far as possible) * and transfers the Trove's ETH collateral from ActivePool to StabilityPool. * Only called by liquidation functions in the TroveManager. */ function offset(uint _debt, uint _coll) external; /* * Returns the total amount of ETH held by the pool, accounted in an internal variable instead of `balance`, * to exclude edge cases like ETH received from a self-destruct. */ function getETH() external view returns (uint); /* * Returns LUSD held in the pool. Changes when users deposit/withdraw, and when Trove debt is offset. */ function getTotalLUSDDeposits() external view returns (uint); /* * Calculates the ETH gain earned by the deposit since its last snapshots were taken. */ function getDepositorETHGain(address _depositor) external view returns (uint); /* * Calculate the LQTY gain earned by a deposit since its last snapshots were taken. * If not tagged with a front end, the depositor gets a 100% cut of what their deposit earned. * Otherwise, their cut of the deposit's earnings is equal to the kickbackRate, set by the front end through * which they made their deposit. */ function getDepositorLQTYGain(address _depositor) external view returns (uint); /* * Return the LQTY gain earned by the front end. */ function getFrontEndLQTYGain(address _frontEnd) external view returns (uint); /* * Return the user's compounded deposit. */ function getCompoundedLUSDDeposit(address _depositor) external view returns (uint); /* * Return the front end's compounded stake. * * The front end's compounded stake is equal to the sum of its depositors' compounded deposits. */ function getCompoundedFrontEndStake(address _frontEnd) external view returns (uint); function depositColl(uint _amount) external; /* * Fallback function * Only callable by Active Pool, it just accounts for ETH received * receive() external payable; */ } // File contracts/Dependencies/IERC20.sol /** * Based on the OpenZeppelin IER20 interface: * https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/IERC20.sol * * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); function increaseAllowance(address spender, uint256 addedValue) external returns (bool); function decreaseAllowance(address spender, uint256 subtractedValue) external returns (bool); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); function name() external view returns (string memory); function symbol() external view returns (string memory); function decimals() external view returns (uint8); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } // File contracts/Dependencies/IERC2612.sol /** * @dev Interface of the ERC2612 standard as defined in the EIP. * * Adds the {permit} method, which can be used to change one's * {IERC20-allowance} without having to send a transaction, by signing a * message. This allows users to spend tokens without having to hold Ether. * * See https://eips.ethereum.org/EIPS/eip-2612. * * Code adapted from https://github.com/OpenZeppelin/openzeppelin-contracts/pull/2237/ */ interface IERC2612 { /** * @dev Sets `amount` as the allowance of `spender` over `owner`'s tokens, * given `owner`'s signed approval. * * IMPORTANT: The same issues {IERC20-approve} has related to transaction * ordering also apply here. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. * - `deadline` must be a timestamp in the future. * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner` * over the EIP712-formatted function arguments. * - the signature must use ``owner``'s current nonce (see {nonces}). * * For more information on the signature format, see the * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP * section]. */ function permit(address owner, address spender, uint256 amount, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external; /** * @dev Returns the current ERC2612 nonce for `owner`. This value must be * included whenever a signature is generated for {permit}. * * Every successful call to {permit} increases `owner`'s nonce by one. This * prevents a signature from being used multiple times. * * `owner` can limit the time a Permit is valid for by setting `deadline` to * a value in the near future. The deadline argument can be set to uint(-1) to * create Permits that effectively never expire. */ function nonces(address owner) external view returns (uint256); function version() external view returns (string memory); function permitTypeHash() external view returns (bytes32); function domainSeparator() external view returns (bytes32); } // File contracts/Interfaces/ILUSDToken.sol interface ILUSDToken is IERC20, IERC2612 { // --- Events --- event LUSDTokenBalanceUpdated(address _user, uint256 _amount); event CollateralAdded( address _troveManagerAddress, address _stabilityPoolAddress, address _borrowerOperationsAddress ); event ColllateralRemoved( address _troveManagerAddress, address _stabilityPoolAddress, address _borrowerOperationsAddress ); // --- Functions --- function addAddressesForColl( address _troveManagerAddress, address _stabilityPoolAddress, address _borrowerOperationsAddress ) external; function removeAddressesForColl( address _troveManagerAddress, address _stabilityPoolAddress, address _borrowerOperationsAddress ) external; function mint(address _account, uint256 _amount) external; function burn(address _account, uint256 _amount) external; function sendToPool( address _sender, address poolAddress, uint256 _amount ) external; function returnFromPool( address poolAddress, address user, uint256 _amount ) external; } // File contracts/Interfaces/ILQTYToken.sol interface ILQTYToken is IERC20, IERC2612 { // --- Events --- event CommunityIssuanceAddressSet(address _communityIssuanceAddress); event LockupContractFactoryAddressSet(address _lockupContractFactoryAddress); // --- Functions --- function getDeploymentStartTime() external view returns (uint256); function getLpRewardsEntitlement() external view returns (uint256); } // File contracts/Interfaces/IStableCollTroveManager.sol // Common interface for the Trove Manager. interface IStableCollTroveManager is ILiquityBase { // --- Events --- event StableCollBorrowerOperationsAddressChanged(address _newStableCollBorrowerOperationsAddress); event LUSDTokenAddressChanged(address _newLUSDTokenAddress); event StableCollActivePoolAddressChanged(address _stableCollActivePoolAddress); event LQTYTokenAddressChanged(address _lqtyTokenAddress); event BorrowingRatePlusChanged(uint _borrowingRatePlus); event TroveUpdated(address indexed _borrower, uint _debt, uint _coll, uint stake, uint8 operation); event TroveLiquidated(address indexed _borrower, uint _debt, uint _coll, uint8 operation); event BaseRateUpdated(uint _baseRate); event LastFeeOpTimeUpdated(uint _lastFeeOpTime); event TotalStakesUpdated(uint _newTotalStakes); event SystemSnapshotsUpdated(uint _totalStakesSnapshot, uint _totalCollateralSnapshot); event LTermsUpdated(uint _L_ETH, uint _L_LUSDDebt); event TroveSnapshotsUpdated(uint _L_ETH, uint _L_LUSDDebt); event TroveIndexUpdated(address _borrower, uint _newIndex); // --- Functions --- function setAddresses( address _stableCollBorrowerOperationsAddress, address _stableCollActivePoolAddress, address _lusdTokenAddress, address _lqtyTokenAddress, address _collTokenAddress, uint _collDecimalAdjustment ) external; function lusdToken() external view returns (ILUSDToken); function lqtyToken() external view returns (ILQTYToken); function getTroveOwnersCount() external view returns (uint); function getTroveFromTroveOwnersArray(uint _index) external view returns (address); function addTroveOwnerToArray(address _borrower) external returns (uint index); function getEntireDebtAndColl(address _borrower) external view returns ( uint debt, uint coll ); function closeTrove(address _borrower) external; function getBorrowingRate() external view returns (uint); function getBorrowingFee(uint LUSDDebt) external view returns (uint); function getDebtCeiling() external view returns (uint); function getStableCollAmount(uint _LUSDDebt) external view returns (uint); function getTroveStatus(address _borrower) external view returns (uint); function getTroveDebt(address _borrower) external view returns (uint); function getTroveColl(address _borrower) external view returns (uint); function setTroveStatus(address _borrower, uint num) external; function increaseTroveColl(address _borrower, uint _collIncrease) external returns (uint); function decreaseTroveColl(address _borrower, uint _collDecrease) external returns (uint); function increaseTroveDebt(address _borrower, uint _debtIncrease) external returns (uint); function decreaseTroveDebt(address _borrower, uint _collDecrease) external returns (uint); function getTCR(uint _price) external view returns (uint); } // File contracts/Dependencies/BaseMath.sol contract BaseMath { uint constant public DECIMAL_PRECISION = 1e18; } // File contracts/Dependencies/SafeMath.sol /** * Based on OpenZeppelin's SafeMath: * https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/math/SafeMath.sol * * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when an * operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. * * _Available since v2.4.0._ */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. * * _Available since v2.4.0._ */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. * * _Available since v2.4.0._ */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } // File contracts/Dependencies/console.sol // Buidler's helper contract for console logging library console { address constant CONSOLE_ADDRESS = address(0x000000000000000000636F6e736F6c652e6c6f67); function log() internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log()")); ignored; } function logInt(int p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(int)", p0)); ignored; } function logUint(uint p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint)", p0)); ignored; } function logString(string memory p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string)", p0)); ignored; } function logBool(bool p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool)", p0)); ignored; } function logAddress(address p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address)", p0)); ignored; } function logBytes(bytes memory p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bytes)", p0)); ignored; } function logByte(byte p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(byte)", p0)); ignored; } function logBytes1(bytes1 p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bytes1)", p0)); ignored; } function logBytes2(bytes2 p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bytes2)", p0)); ignored; } function logBytes3(bytes3 p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bytes3)", p0)); ignored; } function logBytes4(bytes4 p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bytes4)", p0)); ignored; } function logBytes5(bytes5 p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bytes5)", p0)); ignored; } function logBytes6(bytes6 p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bytes6)", p0)); ignored; } function logBytes7(bytes7 p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bytes7)", p0)); ignored; } function logBytes8(bytes8 p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bytes8)", p0)); ignored; } function logBytes9(bytes9 p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bytes9)", p0)); ignored; } function logBytes10(bytes10 p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bytes10)", p0)); ignored; } function logBytes11(bytes11 p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bytes11)", p0)); ignored; } function logBytes12(bytes12 p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bytes12)", p0)); ignored; } function logBytes13(bytes13 p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bytes13)", p0)); ignored; } function logBytes14(bytes14 p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bytes14)", p0)); ignored; } function logBytes15(bytes15 p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bytes15)", p0)); ignored; } function logBytes16(bytes16 p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bytes16)", p0)); ignored; } function logBytes17(bytes17 p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bytes17)", p0)); ignored; } function logBytes18(bytes18 p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bytes18)", p0)); ignored; } function logBytes19(bytes19 p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bytes19)", p0)); ignored; } function logBytes20(bytes20 p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bytes20)", p0)); ignored; } function logBytes21(bytes21 p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bytes21)", p0)); ignored; } function logBytes22(bytes22 p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bytes22)", p0)); ignored; } function logBytes23(bytes23 p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bytes23)", p0)); ignored; } function logBytes24(bytes24 p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bytes24)", p0)); ignored; } function logBytes25(bytes25 p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bytes25)", p0)); ignored; } function logBytes26(bytes26 p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bytes26)", p0)); ignored; } function logBytes27(bytes27 p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bytes27)", p0)); ignored; } function logBytes28(bytes28 p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bytes28)", p0)); ignored; } function logBytes29(bytes29 p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bytes29)", p0)); ignored; } function logBytes30(bytes30 p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bytes30)", p0)); ignored; } function logBytes31(bytes31 p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bytes31)", p0)); ignored; } function logBytes32(bytes32 p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bytes32)", p0)); ignored; } function log(uint p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint)", p0)); ignored; } function log(string memory p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string)", p0)); ignored; } function log(bool p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool)", p0)); ignored; } function log(address p0) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address)", p0)); ignored; } function log(uint p0, uint p1) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,uint)", p0, p1)); ignored; } function log(uint p0, string memory p1) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,string)", p0, p1)); ignored; } function log(uint p0, bool p1) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,bool)", p0, p1)); ignored; } function log(uint p0, address p1) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,address)", p0, p1)); ignored; } function log(string memory p0, uint p1) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,uint)", p0, p1)); ignored; } function log(string memory p0, string memory p1) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,string)", p0, p1)); ignored; } function log(string memory p0, bool p1) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,bool)", p0, p1)); ignored; } function log(string memory p0, address p1) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,address)", p0, p1)); ignored; } function log(bool p0, uint p1) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,uint)", p0, p1)); ignored; } function log(bool p0, string memory p1) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,string)", p0, p1)); ignored; } function log(bool p0, bool p1) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,bool)", p0, p1)); ignored; } function log(bool p0, address p1) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,address)", p0, p1)); ignored; } function log(address p0, uint p1) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,uint)", p0, p1)); ignored; } function log(address p0, string memory p1) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,string)", p0, p1)); ignored; } function log(address p0, bool p1) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,bool)", p0, p1)); ignored; } function log(address p0, address p1) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,address)", p0, p1)); ignored; } function log(uint p0, uint p1, uint p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,uint,uint)", p0, p1, p2)); ignored; } function log(uint p0, uint p1, string memory p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,uint,string)", p0, p1, p2)); ignored; } function log(uint p0, uint p1, bool p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,uint,bool)", p0, p1, p2)); ignored; } function log(uint p0, uint p1, address p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,uint,address)", p0, p1, p2)); ignored; } function log(uint p0, string memory p1, uint p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,string,uint)", p0, p1, p2)); ignored; } function log(uint p0, string memory p1, string memory p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,string,string)", p0, p1, p2)); ignored; } function log(uint p0, string memory p1, bool p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,string,bool)", p0, p1, p2)); ignored; } function log(uint p0, string memory p1, address p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,string,address)", p0, p1, p2)); ignored; } function log(uint p0, bool p1, uint p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,bool,uint)", p0, p1, p2)); ignored; } function log(uint p0, bool p1, string memory p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,bool,string)", p0, p1, p2)); ignored; } function log(uint p0, bool p1, bool p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,bool,bool)", p0, p1, p2)); ignored; } function log(uint p0, bool p1, address p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,bool,address)", p0, p1, p2)); ignored; } function log(uint p0, address p1, uint p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,address,uint)", p0, p1, p2)); ignored; } function log(uint p0, address p1, string memory p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,address,string)", p0, p1, p2)); ignored; } function log(uint p0, address p1, bool p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,address,bool)", p0, p1, p2)); ignored; } function log(uint p0, address p1, address p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,address,address)", p0, p1, p2)); ignored; } function log(string memory p0, uint p1, uint p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,uint,uint)", p0, p1, p2)); ignored; } function log(string memory p0, uint p1, string memory p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,uint,string)", p0, p1, p2)); ignored; } function log(string memory p0, uint p1, bool p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,uint,bool)", p0, p1, p2)); ignored; } function log(string memory p0, uint p1, address p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,uint,address)", p0, p1, p2)); ignored; } function log(string memory p0, string memory p1, uint p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,string,uint)", p0, p1, p2)); ignored; } function log(string memory p0, string memory p1, string memory p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,string,string)", p0, p1, p2)); ignored; } function log(string memory p0, string memory p1, bool p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,string,bool)", p0, p1, p2)); ignored; } function log(string memory p0, string memory p1, address p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,string,address)", p0, p1, p2)); ignored; } function log(string memory p0, bool p1, uint p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,bool,uint)", p0, p1, p2)); ignored; } function log(string memory p0, bool p1, string memory p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,bool,string)", p0, p1, p2)); ignored; } function log(string memory p0, bool p1, bool p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,bool,bool)", p0, p1, p2)); ignored; } function log(string memory p0, bool p1, address p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,bool,address)", p0, p1, p2)); ignored; } function log(string memory p0, address p1, uint p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,address,uint)", p0, p1, p2)); ignored; } function log(string memory p0, address p1, string memory p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,address,string)", p0, p1, p2)); ignored; } function log(string memory p0, address p1, bool p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,address,bool)", p0, p1, p2)); ignored; } function log(string memory p0, address p1, address p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,address,address)", p0, p1, p2)); ignored; } function log(bool p0, uint p1, uint p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,uint,uint)", p0, p1, p2)); ignored; } function log(bool p0, uint p1, string memory p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,uint,string)", p0, p1, p2)); ignored; } function log(bool p0, uint p1, bool p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,uint,bool)", p0, p1, p2)); ignored; } function log(bool p0, uint p1, address p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,uint,address)", p0, p1, p2)); ignored; } function log(bool p0, string memory p1, uint p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,string,uint)", p0, p1, p2)); ignored; } function log(bool p0, string memory p1, string memory p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,string,string)", p0, p1, p2)); ignored; } function log(bool p0, string memory p1, bool p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,string,bool)", p0, p1, p2)); ignored; } function log(bool p0, string memory p1, address p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,string,address)", p0, p1, p2)); ignored; } function log(bool p0, bool p1, uint p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,bool,uint)", p0, p1, p2)); ignored; } function log(bool p0, bool p1, string memory p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,bool,string)", p0, p1, p2)); ignored; } function log(bool p0, bool p1, bool p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,bool,bool)", p0, p1, p2)); ignored; } function log(bool p0, bool p1, address p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,bool,address)", p0, p1, p2)); ignored; } function log(bool p0, address p1, uint p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,address,uint)", p0, p1, p2)); ignored; } function log(bool p0, address p1, string memory p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,address,string)", p0, p1, p2)); ignored; } function log(bool p0, address p1, bool p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,address,bool)", p0, p1, p2)); ignored; } function log(bool p0, address p1, address p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,address,address)", p0, p1, p2)); ignored; } function log(address p0, uint p1, uint p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,uint,uint)", p0, p1, p2)); ignored; } function log(address p0, uint p1, string memory p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,uint,string)", p0, p1, p2)); ignored; } function log(address p0, uint p1, bool p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,uint,bool)", p0, p1, p2)); ignored; } function log(address p0, uint p1, address p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,uint,address)", p0, p1, p2)); ignored; } function log(address p0, string memory p1, uint p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,string,uint)", p0, p1, p2)); ignored; } function log(address p0, string memory p1, string memory p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,string,string)", p0, p1, p2)); ignored; } function log(address p0, string memory p1, bool p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,string,bool)", p0, p1, p2)); ignored; } function log(address p0, string memory p1, address p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,string,address)", p0, p1, p2)); ignored; } function log(address p0, bool p1, uint p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,bool,uint)", p0, p1, p2)); ignored; } function log(address p0, bool p1, string memory p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,bool,string)", p0, p1, p2)); ignored; } function log(address p0, bool p1, bool p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,bool,bool)", p0, p1, p2)); ignored; } function log(address p0, bool p1, address p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,bool,address)", p0, p1, p2)); ignored; } function log(address p0, address p1, uint p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,address,uint)", p0, p1, p2)); ignored; } function log(address p0, address p1, string memory p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,address,string)", p0, p1, p2)); ignored; } function log(address p0, address p1, bool p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,address,bool)", p0, p1, p2)); ignored; } function log(address p0, address p1, address p2) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,address,address)", p0, p1, p2)); ignored; } function log(uint p0, uint p1, uint p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,uint,uint,uint)", p0, p1, p2, p3)); ignored; } function log(uint p0, uint p1, uint p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,uint,uint,string)", p0, p1, p2, p3)); ignored; } function log(uint p0, uint p1, uint p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,uint,uint,bool)", p0, p1, p2, p3)); ignored; } function log(uint p0, uint p1, uint p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,uint,uint,address)", p0, p1, p2, p3)); ignored; } function log(uint p0, uint p1, string memory p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,uint,string,uint)", p0, p1, p2, p3)); ignored; } function log(uint p0, uint p1, string memory p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,uint,string,string)", p0, p1, p2, p3)); ignored; } function log(uint p0, uint p1, string memory p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,uint,string,bool)", p0, p1, p2, p3)); ignored; } function log(uint p0, uint p1, string memory p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,uint,string,address)", p0, p1, p2, p3)); ignored; } function log(uint p0, uint p1, bool p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,uint,bool,uint)", p0, p1, p2, p3)); ignored; } function log(uint p0, uint p1, bool p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,uint,bool,string)", p0, p1, p2, p3)); ignored; } function log(uint p0, uint p1, bool p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,uint,bool,bool)", p0, p1, p2, p3)); ignored; } function log(uint p0, uint p1, bool p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,uint,bool,address)", p0, p1, p2, p3)); ignored; } function log(uint p0, uint p1, address p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,uint,address,uint)", p0, p1, p2, p3)); ignored; } function log(uint p0, uint p1, address p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,uint,address,string)", p0, p1, p2, p3)); ignored; } function log(uint p0, uint p1, address p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,uint,address,bool)", p0, p1, p2, p3)); ignored; } function log(uint p0, uint p1, address p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,uint,address,address)", p0, p1, p2, p3)); ignored; } function log(uint p0, string memory p1, uint p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,string,uint,uint)", p0, p1, p2, p3)); ignored; } function log(uint p0, string memory p1, uint p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,string,uint,string)", p0, p1, p2, p3)); ignored; } function log(uint p0, string memory p1, uint p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,string,uint,bool)", p0, p1, p2, p3)); ignored; } function log(uint p0, string memory p1, uint p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,string,uint,address)", p0, p1, p2, p3)); ignored; } function log(uint p0, string memory p1, string memory p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,string,string,uint)", p0, p1, p2, p3)); ignored; } function log(uint p0, string memory p1, string memory p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,string,string,string)", p0, p1, p2, p3)); ignored; } function log(uint p0, string memory p1, string memory p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,string,string,bool)", p0, p1, p2, p3)); ignored; } function log(uint p0, string memory p1, string memory p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,string,string,address)", p0, p1, p2, p3)); ignored; } function log(uint p0, string memory p1, bool p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,string,bool,uint)", p0, p1, p2, p3)); ignored; } function log(uint p0, string memory p1, bool p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,string,bool,string)", p0, p1, p2, p3)); ignored; } function log(uint p0, string memory p1, bool p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,string,bool,bool)", p0, p1, p2, p3)); ignored; } function log(uint p0, string memory p1, bool p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,string,bool,address)", p0, p1, p2, p3)); ignored; } function log(uint p0, string memory p1, address p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,string,address,uint)", p0, p1, p2, p3)); ignored; } function log(uint p0, string memory p1, address p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,string,address,string)", p0, p1, p2, p3)); ignored; } function log(uint p0, string memory p1, address p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,string,address,bool)", p0, p1, p2, p3)); ignored; } function log(uint p0, string memory p1, address p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,string,address,address)", p0, p1, p2, p3)); ignored; } function log(uint p0, bool p1, uint p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,bool,uint,uint)", p0, p1, p2, p3)); ignored; } function log(uint p0, bool p1, uint p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,bool,uint,string)", p0, p1, p2, p3)); ignored; } function log(uint p0, bool p1, uint p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,bool,uint,bool)", p0, p1, p2, p3)); ignored; } function log(uint p0, bool p1, uint p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,bool,uint,address)", p0, p1, p2, p3)); ignored; } function log(uint p0, bool p1, string memory p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,bool,string,uint)", p0, p1, p2, p3)); ignored; } function log(uint p0, bool p1, string memory p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,bool,string,string)", p0, p1, p2, p3)); ignored; } function log(uint p0, bool p1, string memory p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,bool,string,bool)", p0, p1, p2, p3)); ignored; } function log(uint p0, bool p1, string memory p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,bool,string,address)", p0, p1, p2, p3)); ignored; } function log(uint p0, bool p1, bool p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,bool,bool,uint)", p0, p1, p2, p3)); ignored; } function log(uint p0, bool p1, bool p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,bool,bool,string)", p0, p1, p2, p3)); ignored; } function log(uint p0, bool p1, bool p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,bool,bool,bool)", p0, p1, p2, p3)); ignored; } function log(uint p0, bool p1, bool p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,bool,bool,address)", p0, p1, p2, p3)); ignored; } function log(uint p0, bool p1, address p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,bool,address,uint)", p0, p1, p2, p3)); ignored; } function log(uint p0, bool p1, address p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,bool,address,string)", p0, p1, p2, p3)); ignored; } function log(uint p0, bool p1, address p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,bool,address,bool)", p0, p1, p2, p3)); ignored; } function log(uint p0, bool p1, address p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,bool,address,address)", p0, p1, p2, p3)); ignored; } function log(uint p0, address p1, uint p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,address,uint,uint)", p0, p1, p2, p3)); ignored; } function log(uint p0, address p1, uint p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,address,uint,string)", p0, p1, p2, p3)); ignored; } function log(uint p0, address p1, uint p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,address,uint,bool)", p0, p1, p2, p3)); ignored; } function log(uint p0, address p1, uint p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,address,uint,address)", p0, p1, p2, p3)); ignored; } function log(uint p0, address p1, string memory p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,address,string,uint)", p0, p1, p2, p3)); ignored; } function log(uint p0, address p1, string memory p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,address,string,string)", p0, p1, p2, p3)); ignored; } function log(uint p0, address p1, string memory p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,address,string,bool)", p0, p1, p2, p3)); ignored; } function log(uint p0, address p1, string memory p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,address,string,address)", p0, p1, p2, p3)); ignored; } function log(uint p0, address p1, bool p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,address,bool,uint)", p0, p1, p2, p3)); ignored; } function log(uint p0, address p1, bool p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,address,bool,string)", p0, p1, p2, p3)); ignored; } function log(uint p0, address p1, bool p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,address,bool,bool)", p0, p1, p2, p3)); ignored; } function log(uint p0, address p1, bool p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,address,bool,address)", p0, p1, p2, p3)); ignored; } function log(uint p0, address p1, address p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,address,address,uint)", p0, p1, p2, p3)); ignored; } function log(uint p0, address p1, address p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,address,address,string)", p0, p1, p2, p3)); ignored; } function log(uint p0, address p1, address p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,address,address,bool)", p0, p1, p2, p3)); ignored; } function log(uint p0, address p1, address p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(uint,address,address,address)", p0, p1, p2, p3)); ignored; } function log(string memory p0, uint p1, uint p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,uint,uint,uint)", p0, p1, p2, p3)); ignored; } function log(string memory p0, uint p1, uint p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,uint,uint,string)", p0, p1, p2, p3)); ignored; } function log(string memory p0, uint p1, uint p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,uint,uint,bool)", p0, p1, p2, p3)); ignored; } function log(string memory p0, uint p1, uint p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,uint,uint,address)", p0, p1, p2, p3)); ignored; } function log(string memory p0, uint p1, string memory p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,uint,string,uint)", p0, p1, p2, p3)); ignored; } function log(string memory p0, uint p1, string memory p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,uint,string,string)", p0, p1, p2, p3)); ignored; } function log(string memory p0, uint p1, string memory p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,uint,string,bool)", p0, p1, p2, p3)); ignored; } function log(string memory p0, uint p1, string memory p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,uint,string,address)", p0, p1, p2, p3)); ignored; } function log(string memory p0, uint p1, bool p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,uint,bool,uint)", p0, p1, p2, p3)); ignored; } function log(string memory p0, uint p1, bool p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,uint,bool,string)", p0, p1, p2, p3)); ignored; } function log(string memory p0, uint p1, bool p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,uint,bool,bool)", p0, p1, p2, p3)); ignored; } function log(string memory p0, uint p1, bool p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,uint,bool,address)", p0, p1, p2, p3)); ignored; } function log(string memory p0, uint p1, address p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,uint,address,uint)", p0, p1, p2, p3)); ignored; } function log(string memory p0, uint p1, address p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,uint,address,string)", p0, p1, p2, p3)); ignored; } function log(string memory p0, uint p1, address p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,uint,address,bool)", p0, p1, p2, p3)); ignored; } function log(string memory p0, uint p1, address p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,uint,address,address)", p0, p1, p2, p3)); ignored; } function log(string memory p0, string memory p1, uint p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,string,uint,uint)", p0, p1, p2, p3)); ignored; } function log(string memory p0, string memory p1, uint p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,string,uint,string)", p0, p1, p2, p3)); ignored; } function log(string memory p0, string memory p1, uint p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,string,uint,bool)", p0, p1, p2, p3)); ignored; } function log(string memory p0, string memory p1, uint p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,string,uint,address)", p0, p1, p2, p3)); ignored; } function log(string memory p0, string memory p1, string memory p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,string,string,uint)", p0, p1, p2, p3)); ignored; } function log(string memory p0, string memory p1, string memory p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,string,string,string)", p0, p1, p2, p3)); ignored; } function log(string memory p0, string memory p1, string memory p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,string,string,bool)", p0, p1, p2, p3)); ignored; } function log(string memory p0, string memory p1, string memory p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,string,string,address)", p0, p1, p2, p3)); ignored; } function log(string memory p0, string memory p1, bool p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,string,bool,uint)", p0, p1, p2, p3)); ignored; } function log(string memory p0, string memory p1, bool p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,string,bool,string)", p0, p1, p2, p3)); ignored; } function log(string memory p0, string memory p1, bool p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,string,bool,bool)", p0, p1, p2, p3)); ignored; } function log(string memory p0, string memory p1, bool p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,string,bool,address)", p0, p1, p2, p3)); ignored; } function log(string memory p0, string memory p1, address p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,string,address,uint)", p0, p1, p2, p3)); ignored; } function log(string memory p0, string memory p1, address p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,string,address,string)", p0, p1, p2, p3)); ignored; } function log(string memory p0, string memory p1, address p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,string,address,bool)", p0, p1, p2, p3)); ignored; } function log(string memory p0, string memory p1, address p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,string,address,address)", p0, p1, p2, p3)); ignored; } function log(string memory p0, bool p1, uint p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,bool,uint,uint)", p0, p1, p2, p3)); ignored; } function log(string memory p0, bool p1, uint p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,bool,uint,string)", p0, p1, p2, p3)); ignored; } function log(string memory p0, bool p1, uint p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,bool,uint,bool)", p0, p1, p2, p3)); ignored; } function log(string memory p0, bool p1, uint p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,bool,uint,address)", p0, p1, p2, p3)); ignored; } function log(string memory p0, bool p1, string memory p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,bool,string,uint)", p0, p1, p2, p3)); ignored; } function log(string memory p0, bool p1, string memory p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,bool,string,string)", p0, p1, p2, p3)); ignored; } function log(string memory p0, bool p1, string memory p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,bool,string,bool)", p0, p1, p2, p3)); ignored; } function log(string memory p0, bool p1, string memory p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,bool,string,address)", p0, p1, p2, p3)); ignored; } function log(string memory p0, bool p1, bool p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,bool,bool,uint)", p0, p1, p2, p3)); ignored; } function log(string memory p0, bool p1, bool p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,bool,bool,string)", p0, p1, p2, p3)); ignored; } function log(string memory p0, bool p1, bool p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,bool,bool,bool)", p0, p1, p2, p3)); ignored; } function log(string memory p0, bool p1, bool p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,bool,bool,address)", p0, p1, p2, p3)); ignored; } function log(string memory p0, bool p1, address p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,bool,address,uint)", p0, p1, p2, p3)); ignored; } function log(string memory p0, bool p1, address p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,bool,address,string)", p0, p1, p2, p3)); ignored; } function log(string memory p0, bool p1, address p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,bool,address,bool)", p0, p1, p2, p3)); ignored; } function log(string memory p0, bool p1, address p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,bool,address,address)", p0, p1, p2, p3)); ignored; } function log(string memory p0, address p1, uint p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,address,uint,uint)", p0, p1, p2, p3)); ignored; } function log(string memory p0, address p1, uint p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,address,uint,string)", p0, p1, p2, p3)); ignored; } function log(string memory p0, address p1, uint p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,address,uint,bool)", p0, p1, p2, p3)); ignored; } function log(string memory p0, address p1, uint p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,address,uint,address)", p0, p1, p2, p3)); ignored; } function log(string memory p0, address p1, string memory p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,address,string,uint)", p0, p1, p2, p3)); ignored; } function log(string memory p0, address p1, string memory p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,address,string,string)", p0, p1, p2, p3)); ignored; } function log(string memory p0, address p1, string memory p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,address,string,bool)", p0, p1, p2, p3)); ignored; } function log(string memory p0, address p1, string memory p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,address,string,address)", p0, p1, p2, p3)); ignored; } function log(string memory p0, address p1, bool p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,address,bool,uint)", p0, p1, p2, p3)); ignored; } function log(string memory p0, address p1, bool p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,address,bool,string)", p0, p1, p2, p3)); ignored; } function log(string memory p0, address p1, bool p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,address,bool,bool)", p0, p1, p2, p3)); ignored; } function log(string memory p0, address p1, bool p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,address,bool,address)", p0, p1, p2, p3)); ignored; } function log(string memory p0, address p1, address p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,address,address,uint)", p0, p1, p2, p3)); ignored; } function log(string memory p0, address p1, address p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,address,address,string)", p0, p1, p2, p3)); ignored; } function log(string memory p0, address p1, address p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,address,address,bool)", p0, p1, p2, p3)); ignored; } function log(string memory p0, address p1, address p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(string,address,address,address)", p0, p1, p2, p3)); ignored; } function log(bool p0, uint p1, uint p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,uint,uint,uint)", p0, p1, p2, p3)); ignored; } function log(bool p0, uint p1, uint p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,uint,uint,string)", p0, p1, p2, p3)); ignored; } function log(bool p0, uint p1, uint p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,uint,uint,bool)", p0, p1, p2, p3)); ignored; } function log(bool p0, uint p1, uint p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,uint,uint,address)", p0, p1, p2, p3)); ignored; } function log(bool p0, uint p1, string memory p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,uint,string,uint)", p0, p1, p2, p3)); ignored; } function log(bool p0, uint p1, string memory p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,uint,string,string)", p0, p1, p2, p3)); ignored; } function log(bool p0, uint p1, string memory p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,uint,string,bool)", p0, p1, p2, p3)); ignored; } function log(bool p0, uint p1, string memory p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,uint,string,address)", p0, p1, p2, p3)); ignored; } function log(bool p0, uint p1, bool p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,uint,bool,uint)", p0, p1, p2, p3)); ignored; } function log(bool p0, uint p1, bool p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,uint,bool,string)", p0, p1, p2, p3)); ignored; } function log(bool p0, uint p1, bool p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,uint,bool,bool)", p0, p1, p2, p3)); ignored; } function log(bool p0, uint p1, bool p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,uint,bool,address)", p0, p1, p2, p3)); ignored; } function log(bool p0, uint p1, address p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,uint,address,uint)", p0, p1, p2, p3)); ignored; } function log(bool p0, uint p1, address p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,uint,address,string)", p0, p1, p2, p3)); ignored; } function log(bool p0, uint p1, address p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,uint,address,bool)", p0, p1, p2, p3)); ignored; } function log(bool p0, uint p1, address p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,uint,address,address)", p0, p1, p2, p3)); ignored; } function log(bool p0, string memory p1, uint p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,string,uint,uint)", p0, p1, p2, p3)); ignored; } function log(bool p0, string memory p1, uint p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,string,uint,string)", p0, p1, p2, p3)); ignored; } function log(bool p0, string memory p1, uint p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,string,uint,bool)", p0, p1, p2, p3)); ignored; } function log(bool p0, string memory p1, uint p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,string,uint,address)", p0, p1, p2, p3)); ignored; } function log(bool p0, string memory p1, string memory p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,string,string,uint)", p0, p1, p2, p3)); ignored; } function log(bool p0, string memory p1, string memory p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,string,string,string)", p0, p1, p2, p3)); ignored; } function log(bool p0, string memory p1, string memory p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,string,string,bool)", p0, p1, p2, p3)); ignored; } function log(bool p0, string memory p1, string memory p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,string,string,address)", p0, p1, p2, p3)); ignored; } function log(bool p0, string memory p1, bool p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,string,bool,uint)", p0, p1, p2, p3)); ignored; } function log(bool p0, string memory p1, bool p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,string,bool,string)", p0, p1, p2, p3)); ignored; } function log(bool p0, string memory p1, bool p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,string,bool,bool)", p0, p1, p2, p3)); ignored; } function log(bool p0, string memory p1, bool p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,string,bool,address)", p0, p1, p2, p3)); ignored; } function log(bool p0, string memory p1, address p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,string,address,uint)", p0, p1, p2, p3)); ignored; } function log(bool p0, string memory p1, address p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,string,address,string)", p0, p1, p2, p3)); ignored; } function log(bool p0, string memory p1, address p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,string,address,bool)", p0, p1, p2, p3)); ignored; } function log(bool p0, string memory p1, address p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,string,address,address)", p0, p1, p2, p3)); ignored; } function log(bool p0, bool p1, uint p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,bool,uint,uint)", p0, p1, p2, p3)); ignored; } function log(bool p0, bool p1, uint p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,bool,uint,string)", p0, p1, p2, p3)); ignored; } function log(bool p0, bool p1, uint p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,bool,uint,bool)", p0, p1, p2, p3)); ignored; } function log(bool p0, bool p1, uint p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,bool,uint,address)", p0, p1, p2, p3)); ignored; } function log(bool p0, bool p1, string memory p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,bool,string,uint)", p0, p1, p2, p3)); ignored; } function log(bool p0, bool p1, string memory p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,bool,string,string)", p0, p1, p2, p3)); ignored; } function log(bool p0, bool p1, string memory p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,bool,string,bool)", p0, p1, p2, p3)); ignored; } function log(bool p0, bool p1, string memory p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,bool,string,address)", p0, p1, p2, p3)); ignored; } function log(bool p0, bool p1, bool p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,bool,bool,uint)", p0, p1, p2, p3)); ignored; } function log(bool p0, bool p1, bool p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,bool,bool,string)", p0, p1, p2, p3)); ignored; } function log(bool p0, bool p1, bool p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,bool,bool,bool)", p0, p1, p2, p3)); ignored; } function log(bool p0, bool p1, bool p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,bool,bool,address)", p0, p1, p2, p3)); ignored; } function log(bool p0, bool p1, address p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,bool,address,uint)", p0, p1, p2, p3)); ignored; } function log(bool p0, bool p1, address p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,bool,address,string)", p0, p1, p2, p3)); ignored; } function log(bool p0, bool p1, address p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,bool,address,bool)", p0, p1, p2, p3)); ignored; } function log(bool p0, bool p1, address p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,bool,address,address)", p0, p1, p2, p3)); ignored; } function log(bool p0, address p1, uint p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,address,uint,uint)", p0, p1, p2, p3)); ignored; } function log(bool p0, address p1, uint p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,address,uint,string)", p0, p1, p2, p3)); ignored; } function log(bool p0, address p1, uint p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,address,uint,bool)", p0, p1, p2, p3)); ignored; } function log(bool p0, address p1, uint p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,address,uint,address)", p0, p1, p2, p3)); ignored; } function log(bool p0, address p1, string memory p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,address,string,uint)", p0, p1, p2, p3)); ignored; } function log(bool p0, address p1, string memory p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,address,string,string)", p0, p1, p2, p3)); ignored; } function log(bool p0, address p1, string memory p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,address,string,bool)", p0, p1, p2, p3)); ignored; } function log(bool p0, address p1, string memory p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,address,string,address)", p0, p1, p2, p3)); ignored; } function log(bool p0, address p1, bool p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,address,bool,uint)", p0, p1, p2, p3)); ignored; } function log(bool p0, address p1, bool p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,address,bool,string)", p0, p1, p2, p3)); ignored; } function log(bool p0, address p1, bool p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,address,bool,bool)", p0, p1, p2, p3)); ignored; } function log(bool p0, address p1, bool p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,address,bool,address)", p0, p1, p2, p3)); ignored; } function log(bool p0, address p1, address p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,address,address,uint)", p0, p1, p2, p3)); ignored; } function log(bool p0, address p1, address p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,address,address,string)", p0, p1, p2, p3)); ignored; } function log(bool p0, address p1, address p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,address,address,bool)", p0, p1, p2, p3)); ignored; } function log(bool p0, address p1, address p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(bool,address,address,address)", p0, p1, p2, p3)); ignored; } function log(address p0, uint p1, uint p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,uint,uint,uint)", p0, p1, p2, p3)); ignored; } function log(address p0, uint p1, uint p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,uint,uint,string)", p0, p1, p2, p3)); ignored; } function log(address p0, uint p1, uint p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,uint,uint,bool)", p0, p1, p2, p3)); ignored; } function log(address p0, uint p1, uint p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,uint,uint,address)", p0, p1, p2, p3)); ignored; } function log(address p0, uint p1, string memory p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,uint,string,uint)", p0, p1, p2, p3)); ignored; } function log(address p0, uint p1, string memory p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,uint,string,string)", p0, p1, p2, p3)); ignored; } function log(address p0, uint p1, string memory p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,uint,string,bool)", p0, p1, p2, p3)); ignored; } function log(address p0, uint p1, string memory p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,uint,string,address)", p0, p1, p2, p3)); ignored; } function log(address p0, uint p1, bool p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,uint,bool,uint)", p0, p1, p2, p3)); ignored; } function log(address p0, uint p1, bool p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,uint,bool,string)", p0, p1, p2, p3)); ignored; } function log(address p0, uint p1, bool p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,uint,bool,bool)", p0, p1, p2, p3)); ignored; } function log(address p0, uint p1, bool p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,uint,bool,address)", p0, p1, p2, p3)); ignored; } function log(address p0, uint p1, address p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,uint,address,uint)", p0, p1, p2, p3)); ignored; } function log(address p0, uint p1, address p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,uint,address,string)", p0, p1, p2, p3)); ignored; } function log(address p0, uint p1, address p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,uint,address,bool)", p0, p1, p2, p3)); ignored; } function log(address p0, uint p1, address p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,uint,address,address)", p0, p1, p2, p3)); ignored; } function log(address p0, string memory p1, uint p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,string,uint,uint)", p0, p1, p2, p3)); ignored; } function log(address p0, string memory p1, uint p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,string,uint,string)", p0, p1, p2, p3)); ignored; } function log(address p0, string memory p1, uint p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,string,uint,bool)", p0, p1, p2, p3)); ignored; } function log(address p0, string memory p1, uint p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,string,uint,address)", p0, p1, p2, p3)); ignored; } function log(address p0, string memory p1, string memory p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,string,string,uint)", p0, p1, p2, p3)); ignored; } function log(address p0, string memory p1, string memory p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,string,string,string)", p0, p1, p2, p3)); ignored; } function log(address p0, string memory p1, string memory p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,string,string,bool)", p0, p1, p2, p3)); ignored; } function log(address p0, string memory p1, string memory p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,string,string,address)", p0, p1, p2, p3)); ignored; } function log(address p0, string memory p1, bool p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,string,bool,uint)", p0, p1, p2, p3)); ignored; } function log(address p0, string memory p1, bool p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,string,bool,string)", p0, p1, p2, p3)); ignored; } function log(address p0, string memory p1, bool p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,string,bool,bool)", p0, p1, p2, p3)); ignored; } function log(address p0, string memory p1, bool p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,string,bool,address)", p0, p1, p2, p3)); ignored; } function log(address p0, string memory p1, address p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,string,address,uint)", p0, p1, p2, p3)); ignored; } function log(address p0, string memory p1, address p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,string,address,string)", p0, p1, p2, p3)); ignored; } function log(address p0, string memory p1, address p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,string,address,bool)", p0, p1, p2, p3)); ignored; } function log(address p0, string memory p1, address p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,string,address,address)", p0, p1, p2, p3)); ignored; } function log(address p0, bool p1, uint p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,bool,uint,uint)", p0, p1, p2, p3)); ignored; } function log(address p0, bool p1, uint p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,bool,uint,string)", p0, p1, p2, p3)); ignored; } function log(address p0, bool p1, uint p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,bool,uint,bool)", p0, p1, p2, p3)); ignored; } function log(address p0, bool p1, uint p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,bool,uint,address)", p0, p1, p2, p3)); ignored; } function log(address p0, bool p1, string memory p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,bool,string,uint)", p0, p1, p2, p3)); ignored; } function log(address p0, bool p1, string memory p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,bool,string,string)", p0, p1, p2, p3)); ignored; } function log(address p0, bool p1, string memory p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,bool,string,bool)", p0, p1, p2, p3)); ignored; } function log(address p0, bool p1, string memory p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,bool,string,address)", p0, p1, p2, p3)); ignored; } function log(address p0, bool p1, bool p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,bool,bool,uint)", p0, p1, p2, p3)); ignored; } function log(address p0, bool p1, bool p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,bool,bool,string)", p0, p1, p2, p3)); ignored; } function log(address p0, bool p1, bool p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,bool,bool,bool)", p0, p1, p2, p3)); ignored; } function log(address p0, bool p1, bool p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,bool,bool,address)", p0, p1, p2, p3)); ignored; } function log(address p0, bool p1, address p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,bool,address,uint)", p0, p1, p2, p3)); ignored; } function log(address p0, bool p1, address p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,bool,address,string)", p0, p1, p2, p3)); ignored; } function log(address p0, bool p1, address p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,bool,address,bool)", p0, p1, p2, p3)); ignored; } function log(address p0, bool p1, address p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,bool,address,address)", p0, p1, p2, p3)); ignored; } function log(address p0, address p1, uint p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,address,uint,uint)", p0, p1, p2, p3)); ignored; } function log(address p0, address p1, uint p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,address,uint,string)", p0, p1, p2, p3)); ignored; } function log(address p0, address p1, uint p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,address,uint,bool)", p0, p1, p2, p3)); ignored; } function log(address p0, address p1, uint p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,address,uint,address)", p0, p1, p2, p3)); ignored; } function log(address p0, address p1, string memory p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,address,string,uint)", p0, p1, p2, p3)); ignored; } function log(address p0, address p1, string memory p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,address,string,string)", p0, p1, p2, p3)); ignored; } function log(address p0, address p1, string memory p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,address,string,bool)", p0, p1, p2, p3)); ignored; } function log(address p0, address p1, string memory p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,address,string,address)", p0, p1, p2, p3)); ignored; } function log(address p0, address p1, bool p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,address,bool,uint)", p0, p1, p2, p3)); ignored; } function log(address p0, address p1, bool p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,address,bool,string)", p0, p1, p2, p3)); ignored; } function log(address p0, address p1, bool p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,address,bool,bool)", p0, p1, p2, p3)); ignored; } function log(address p0, address p1, bool p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,address,bool,address)", p0, p1, p2, p3)); ignored; } function log(address p0, address p1, address p2, uint p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,address,address,uint)", p0, p1, p2, p3)); ignored; } function log(address p0, address p1, address p2, string memory p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,address,address,string)", p0, p1, p2, p3)); ignored; } function log(address p0, address p1, address p2, bool p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,address,address,bool)", p0, p1, p2, p3)); ignored; } function log(address p0, address p1, address p2, address p3) internal view { (bool ignored, ) = CONSOLE_ADDRESS.staticcall(abi.encodeWithSignature("log(address,address,address,address)", p0, p1, p2, p3)); ignored; } } // File contracts/Dependencies/LiquityMath.sol library LiquityMath { using SafeMath for uint; uint internal constant DECIMAL_PRECISION = 1e18; /* Precision for Nominal ICR (independent of price). Rationale for the value: * * - Making it “too high” could lead to overflows. * - Making it “too low” could lead to an ICR equal to zero, due to truncation from Solidity floor division. * * This value of 1e20 is chosen for safety: the NICR will only overflow for numerator > ~1e39 ETH, * and will only truncate to 0 if the denominator is at least 1e20 times greater than the numerator. * */ uint internal constant NICR_PRECISION = 1e20; function _min(uint _a, uint _b) internal pure returns (uint) { return (_a < _b) ? _a : _b; } function _max(uint _a, uint _b) internal pure returns (uint) { return (_a >= _b) ? _a : _b; } /* * Multiply two decimal numbers and use normal rounding rules: * -round product up if 19'th mantissa digit >= 5 * -round product down if 19'th mantissa digit < 5 * * Used only inside the exponentiation, _decPow(). */ function decMul(uint x, uint y) internal pure returns (uint decProd) { uint prod_xy = x.mul(y); decProd = prod_xy.add(DECIMAL_PRECISION / 2).div(DECIMAL_PRECISION); } /* * _decPow: Exponentiation function for 18-digit decimal base, and integer exponent n. * * Uses the efficient "exponentiation by squaring" algorithm. O(log(n)) complexity. * * Called by two functions that represent time in units of minutes: * 1) TroveManager._calcDecayedBaseRate * 2) CommunityIssuance._getCumulativeIssuanceFraction * * The exponent is capped to avoid reverting due to overflow. The cap 525600000 equals * "minutes in 1000 years": 60 * 24 * 365 * 1000 * * If a period of > 1000 years is ever used as an exponent in either of the above functions, the result will be * negligibly different from just passing the cap, since: * * In function 1), the decayed base rate will be 0 for 1000 years or > 1000 years * In function 2), the difference in tokens issued at 1000 years and any time > 1000 years, will be negligible */ function _decPow(uint _base, uint _minutes) internal pure returns (uint) { if (_minutes > 525600000) {_minutes = 525600000;} // cap to avoid overflow if (_minutes == 0) {return DECIMAL_PRECISION;} uint y = DECIMAL_PRECISION; uint x = _base; uint n = _minutes; // Exponentiation-by-squaring while (n > 1) { if (n % 2 == 0) { x = decMul(x, x); n = n.div(2); } else { // if (n % 2 != 0) y = decMul(x, y); x = decMul(x, x); n = (n.sub(1)).div(2); } } return decMul(x, y); } function _getAbsoluteDifference(uint _a, uint _b) internal pure returns (uint) { return (_a >= _b) ? _a.sub(_b) : _b.sub(_a); } function _computeNominalCR(uint _coll, uint _debt, uint _collDecimalAdjustment) internal pure returns (uint) { if (_debt > 0) { return _coll.mul(_collDecimalAdjustment).mul(NICR_PRECISION).div(_debt); } // Return the maximal value for uint256 if the Trove has a debt of 0. Represents "infinite" CR. else { // if (_debt == 0) return 2**256 - 1; } } function _computeCR(uint _coll, uint _debt, uint _price, uint _collDecimalAdjustment) internal pure returns (uint) { if (_debt > 0) { uint newCollRatio = _coll.mul(_collDecimalAdjustment).mul(_price).div(_debt); return newCollRatio; } // Return the maximal value for uint256 if the Trove has a debt of 0. Represents "infinite" CR. else { // if (_debt == 0) return 2**256 - 1; } } } // File contracts/Interfaces/IPool.sol // Common interface for the Pools. interface IPool { // --- Events --- event ETHBalanceUpdated(uint _newBalance); event LUSDBalanceUpdated(uint _newBalance); event ActivePoolAddressChanged(address _newActivePoolAddress); event DefaultPoolAddressChanged(address _newDefaultPoolAddress); event StabilityPoolAddressChanged(address _newStabilityPoolAddress); event EtherSent(address _to, uint _amount); // --- Functions --- function getETH() external view returns (uint); function getLUSDDebt() external view returns (uint); function increaseLUSDDebt(uint _amount) external; function depositColl(uint _amount) external; function decreaseLUSDDebt(uint _amount) external; } // File contracts/Interfaces/IActivePool.sol interface IActivePool is IPool { // --- Events --- event BorrowerOperationsAddressChanged(address _newBorrowerOperationsAddress); event TroveManagerAddressChanged(address _newTroveManagerAddress); event ActivePoolLUSDDebtUpdated(uint _LUSDDebt); event ActivePoolETHBalanceUpdated(uint _ETH); event CollAddressChanged(address _wethTokenAddress); // --- Functions --- function sendETH(address _account, uint _amount) external; function notifyFee(address _feeForwarderAddress, uint _amount) external; } // File contracts/Interfaces/IStableCollActivePool.sol interface IStableCollActivePool is IPool { // --- Events --- event StableCollBorrowerOperationsAddressChanged(address _newStableCollBorrowerOperationsAddress); event StableCollTroveManagerAddressChanged(address _newStableCollTroveManagerAddress); event StableCollActivePoolLUSDDebtUpdated(uint _LUSDDebt); event StableCollActivePoolETHBalanceUpdated(uint _ETH); event CollAddressChanged(address _collTokenAddress); // --- Functions --- function sendETH(address _account, uint _amount) external; } // File contracts/Interfaces/IDefaultPool.sol interface IDefaultPool is IPool { // --- Events --- event TroveManagerAddressChanged(address _newTroveManagerAddress); event DefaultPoolLUSDDebtUpdated(uint _LUSDDebt); event DefaultPoolETHBalanceUpdated(uint _ETH); event CollTokenAddressUpdated(address _collTokenAddress); // --- Functions --- function sendETHToActivePool(uint _amount) external; } // File contracts/Dependencies/LiquityBase.sol /* * Base contract for TroveManager, BorrowerOperations and StabilityPool. Contains global system constants and * common functions. */ contract LiquityBase is BaseMath, ILiquityBase { using SafeMath for uint; uint constant public _100pct = 1000000000000000000; // 1e18 == 100% // Minimum collateral ratio for individual troves uint constant public MCR = 1100000000000000000; // 110% // Minimum stablecoin collateral ratio for individual troves uint constant public MSCR = 1000000000000000000; // 100% // Critical system collateral ratio. If the system's total collateral ratio (TCR) falls below the CCR, Recovery Mode is triggered. uint constant public CCR = 1500000000000000000; // 150% // Amount of LUSD to be locked in gas pool on opening troves uint constant public LUSD_GAS_COMPENSATION = 400e18; // Minimum amount of net LUSD debt a trove must have uint constant public MIN_NET_DEBT = 2000e18; uint constant public PERCENT_DIVISOR = 200; // dividing by 200 yields 0.5% uint constant public STABLE_COLL_BORROWING_RATE = DECIMAL_PRECISION / 100; // 1% uint constant public STABLE_COLL_COLLATERAL_RARIO = 1010000000000000000; // 101% uint constant public STABLE_COLL_COLLATERAL_RARIO_DIVIDEND = 101; uint constant public STABLE_COLL_COLLATERAL_RARIO_DIVISOR = 100; uint constant public STABLE_COLL_DEBT_CEILING = DECIMAL_PRECISION * 1e4; // 10,000 uint constant public COLL_DEBT_CEILING = DECIMAL_PRECISION * 1e4; // 10,000 uint constant public BORROWING_FEE_FLOOR = DECIMAL_PRECISION / 1000 * 4; // 0.4% IActivePool public activePool; IStableCollActivePool public stableCollActivePool; IDefaultPool public defaultPool; IPriceFeed public override priceFeed; // --- Gas compensation functions --- // Returns the composite debt (drawn debt + gas compensation) of a trove, for the purpose of ICR calculation function _getCompositeDebt(uint _debt) internal pure returns (uint) { return _debt.add(LUSD_GAS_COMPENSATION); } function _getNetDebt(uint _debt) internal pure returns (uint) { return _debt.sub(LUSD_GAS_COMPENSATION); } // Return the amount of ETH to be drawn from a trove's collateral and sent as gas compensation. function _getCollGasCompensation(uint _entireColl) internal pure returns (uint) { return _entireColl / PERCENT_DIVISOR; } function getEntireSystemColl() public view returns (uint) { uint activeColl = activePool.getETH(); uint liquidatedColl = defaultPool.getETH(); return activeColl.add(liquidatedColl); } function getEntireSystemStableColl() public view returns (uint) { return stableCollActivePool.getETH(); } function getEntireSystemDebt() public view returns (uint) { uint activeDebt = activePool.getLUSDDebt(); uint closedDebt = defaultPool.getLUSDDebt(); return activeDebt.add(closedDebt); } function getEntireSystemStableDebt() public view returns (uint) { return stableCollActivePool.getLUSDDebt(); } function _getTCR(uint _price, uint _collDecimalAdjustment) internal view returns (uint) { uint entireSystemColl = getEntireSystemColl(); uint entireSystemDebt = getEntireSystemDebt(); uint TCR = LiquityMath._computeCR(entireSystemColl, entireSystemDebt, _price, _collDecimalAdjustment); return TCR; } function _checkRecoveryMode(uint _price, uint _collDecimalAdjustment) internal view returns (bool) { uint TCR = _getTCR(_price, _collDecimalAdjustment); return TCR < CCR; } function _requireUserAcceptsFee(uint _fee, uint _amount, uint _maxFeePercentage) internal pure { uint feePercentage = _fee.mul(DECIMAL_PRECISION).div(_amount); require(feePercentage <= _maxFeePercentage, "Fee exceeded provided maximum"); } } // File contracts/Dependencies/Ownable.sol /** * Based on OpenZeppelin's Ownable contract: * https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/access/Ownable.sol * * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ contract Ownable { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor () internal { _owner = msg.sender; emit OwnershipTransferred(address(0), msg.sender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(isOwner(), "Ownable: caller is not the owner"); _; } /** * @dev Returns true if the caller is the current owner. */ function isOwner() public view returns (bool) { return msg.sender == _owner; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. * * NOTE: This function is not safe, as it doesn’t check owner is calling it. * Make sure you check it before calling it. */ function _renounceOwnership() internal { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } } // File contracts/Dependencies/CheckContract.sol contract CheckContract { /** * Check that the account is an already deployed non-destroyed contract. * See: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/Address.sol#L12 */ function checkContract(address _account) internal view { require(_account != address(0), "Account cannot be zero address"); uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(_account) } require(size > 0, "Account code size cannot be zero"); } } // File contracts/StableColl/StableCollTroveManager.sol contract StableCollTroveManager is LiquityBase, Ownable, CheckContract, IStableCollTroveManager { string constant public NAME = "StableCollTroveManager"; // --- Connected contract declarations --- address public stableCollBorrowerOperationsAddress; ILUSDToken public override lusdToken; ILQTYToken public override lqtyToken; address public collTokenAddress; // During bootsrap period redemptions are not allowed uint constant public BOOTSTRAP_PERIOD = 21 days; bool isAddressesSet = false; uint public debtCeilingPlus; uint private collDecimalAdjustment; enum Functions { SET_DEBT_CEILING } uint256 private constant _TIMELOCK = 1 days; mapping(Functions => uint256) public timelock; // --- Time lock modifier notLocked(Functions _fn) { require( timelock[_fn] != 1 && timelock[_fn] <= block.timestamp, "Function is timelocked" ); _; } //unlock timelock function unlockFunction(Functions _fn) public onlyOwner { timelock[_fn] = block.timestamp + _TIMELOCK; } //lock timelock function lockFunction(Functions _fn) public onlyOwner { timelock[_fn] = 1; } // --- Data structures --- enum Status { nonExistent, active, closedByOwner } // Store the necessary data for a trove struct Trove { uint debt; uint coll; uint stake; /* To be removed */ Status status; uint128 arrayIndex; } mapping (address => Trove) public Troves; // Array of all active trove addresses - used to to compute an approximate hint off-chain, for the sorted list insertion address[] public TroveOwners; struct ContractsCache { IStableCollActivePool stableCollActivePool; ILUSDToken lusdToken; } // --- Events --- event StableCollBorrowerOperationsAddressChanged(address _newStableCollBorrowerOperationsAddress); event LUSDTokenAddressChanged(address _newLUSDTokenAddress); event StableCollActivePoolAddressChanged(address _stableCollActivePoolAddress); event LQTYTokenAddressChanged(address _lqtyTokenAddress); event DebtCeilingPlusChanged(uint _debtCeilingPlus); // --- Dependency setter --- function setAddresses( address _stableCollBorrowerOperationsAddress, address _stableCollActivePoolAddress, address _lusdTokenAddress, address _lqtyTokenAddress, address _collTokenAddress, uint _collDecimalAdjustment ) external override onlyOwner { require(!isAddressesSet, "StableCollTroveManager: Addresses are already set!"); isAddressesSet = true; checkContract(_stableCollBorrowerOperationsAddress); checkContract(_stableCollActivePoolAddress); checkContract(_lusdTokenAddress); checkContract(_lqtyTokenAddress); stableCollBorrowerOperationsAddress = _stableCollBorrowerOperationsAddress; stableCollActivePool = IStableCollActivePool(_stableCollActivePoolAddress); lusdToken = ILUSDToken(_lusdTokenAddress); lqtyToken = ILQTYToken(_lqtyTokenAddress); collTokenAddress = _collTokenAddress; collDecimalAdjustment = _collDecimalAdjustment; emit StableCollBorrowerOperationsAddressChanged(_stableCollBorrowerOperationsAddress); emit StableCollActivePoolAddressChanged(_stableCollActivePoolAddress); emit LUSDTokenAddressChanged(_lusdTokenAddress); emit LQTYTokenAddressChanged(_lqtyTokenAddress); } function setDebtCeilingPlus(uint _debtCeilingPlus) external onlyOwner notLocked(Functions.SET_DEBT_CEILING) { debtCeilingPlus = _debtCeilingPlus; emit DebtCeilingPlusChanged(_debtCeilingPlus); timelock[Functions.SET_DEBT_CEILING] = 1; } // --- Getters --- function getTroveOwnersCount() external view override returns (uint) { return TroveOwners.length; } function getTroveFromTroveOwnersArray(uint _index) external view override returns (address) { return TroveOwners[_index]; } // Return the Troves entire debt and coll. function getEntireDebtAndColl( address _borrower ) public view override returns (uint debt, uint coll) { debt = Troves[_borrower].debt; coll = Troves[_borrower].coll; } function closeTrove(address _borrower) external override { _requireCallerIsBorrowerOperations(); return _closeTrove(_borrower, Status.closedByOwner); } function _closeTrove(address _borrower, Status closedStatus) internal { assert(closedStatus != Status.nonExistent && closedStatus != Status.active); uint TroveOwnersArrayLength = TroveOwners.length; _requireMoreThanOneTroveInSystem(TroveOwnersArrayLength); Troves[_borrower].status = closedStatus; Troves[_borrower].coll = 0; Troves[_borrower].debt = 0; _removeTroveOwner(_borrower, TroveOwnersArrayLength); } // Push the owner's address to the Trove owners list, and record the corresponding array index on the Trove struct function addTroveOwnerToArray(address _borrower) external override returns (uint index) { _requireCallerIsBorrowerOperations(); return _addTroveOwnerToArray(_borrower); } function _addTroveOwnerToArray(address _borrower) internal returns (uint128 index) { /* Max array size is 2**128 - 1, i.e. ~3e30 troves. No risk of overflow, since troves have minimum LUSD debt of liquidation reserve plus MIN_NET_DEBT. 3e30 LUSD dwarfs the value of all wealth in the world ( which is < 1e15 USD). */ // Push the Troveowner to the array TroveOwners.push(_borrower); // Record the index of the new Troveowner on their Trove struct index = uint128(TroveOwners.length.sub(1)); Troves[_borrower].arrayIndex = index; return index; } /* * Remove a Trove owner from the TroveOwners array, not preserving array order. Removing owner 'B' does the following: * [A B C D E] => [A E C D], and updates E's Trove struct to point to its new array index. */ function _removeTroveOwner(address _borrower, uint TroveOwnersArrayLength) internal { Status troveStatus = Troves[_borrower].status; // It’s set in caller function `_closeTrove` assert(troveStatus != Status.nonExistent && troveStatus != Status.active); uint128 index = Troves[_borrower].arrayIndex; uint length = TroveOwnersArrayLength; uint idxLast = length.sub(1); assert(index <= idxLast); address addressToMove = TroveOwners[idxLast]; TroveOwners[index] = addressToMove; Troves[addressToMove].arrayIndex = index; emit TroveIndexUpdated(addressToMove, index); TroveOwners.pop(); } // --- Recovery Mode and TCR functions --- function getTCR(uint _price) external view override returns (uint) { return _getTCR(_price, collDecimalAdjustment); } // --- Borrowing fee functions --- function getBorrowingRate() public view override returns (uint) { /* mark */ return STABLE_COLL_BORROWING_RATE; } function getBorrowingFee(uint _LUSDDebt) external view override returns (uint) { /* mark */ return _calcBorrowingFee(getBorrowingRate(), _LUSDDebt); } function _calcBorrowingFee(uint _borrowingRate, uint _LUSDDebt) internal pure returns (uint) { /* mark */ return _borrowingRate.mul(_LUSDDebt).div(DECIMAL_PRECISION); } function getDebtCeiling() public view override returns (uint) { /* mark */ return STABLE_COLL_DEBT_CEILING.add(debtCeilingPlus); } function getStableCollAmount(uint _LUSDDebt) public view override returns (uint) { /* mark */ return _LUSDDebt.mul(STABLE_COLL_COLLATERAL_RARIO).div(DECIMAL_PRECISION).div(collDecimalAdjustment); } // --- 'require' wrapper functions --- function _requireCallerIsBorrowerOperations() internal view { require(msg.sender == stableCollBorrowerOperationsAddress, "StableCollTroveManager: Caller is not the BorrowerOperations contract"); } function _requireTroveIsActive(address _borrower) internal view { require(Troves[_borrower].status == Status.active, "StableCollTroveManager: Trove does not exist or is closed"); } function _requireLUSDBalanceCoversRedemption(ILUSDToken _lusdToken, address _redeemer, uint _amount) internal view { require(_lusdToken.balanceOf(_redeemer) >= _amount, "StableCollTroveManager: Requested redemption amount must be <= user's LUSD token balance"); } function _requireMoreThanOneTroveInSystem(uint TroveOwnersArrayLength) internal view { require (TroveOwnersArrayLength > 1, "StableCollTroveManager: Only one trove in the system"); } function _requireAmountGreaterThanZero(uint _amount) internal pure { require(_amount > 0, "StableCollTroveManager: Amount must be greater than zero"); } function _requireTCRoverMCR(uint _price) internal view { require(_getTCR(_price, collDecimalAdjustment) >= MCR, "StableCollTroveManager: Cannot redeem when TCR < MCR"); } function _requireAfterBootstrapPeriod() internal view { uint systemDeploymentTime = lqtyToken.getDeploymentStartTime(); require(block.timestamp >= systemDeploymentTime.add(BOOTSTRAP_PERIOD), "StableCollTroveManager: Redemptions are not allowed during bootstrap phase"); } // --- Trove property getters --- function getTroveStatus(address _borrower) external view override returns (uint) { /* mark */ return uint(Troves[_borrower].status); } function getTroveDebt(address _borrower) external view override returns (uint) { return Troves[_borrower].debt; } function getTroveColl(address _borrower) external view override returns (uint) { return Troves[_borrower].coll; } // --- Trove property setters, called by BorrowerOperations --- function setTroveStatus(address _borrower, uint _num) external override { /* mark */ _requireCallerIsBorrowerOperations(); Troves[_borrower].status = Status(_num); } function increaseTroveColl(address _borrower, uint _collIncrease) external override returns (uint) { _requireCallerIsBorrowerOperations(); uint newColl = Troves[_borrower].coll.add(_collIncrease); Troves[_borrower].coll = newColl; return newColl; } function decreaseTroveColl(address _borrower, uint _collDecrease) external override returns (uint) { _requireCallerIsBorrowerOperations(); uint newColl = Troves[_borrower].coll.sub(_collDecrease); Troves[_borrower].coll = newColl; return newColl; } function increaseTroveDebt(address _borrower, uint _debtIncrease) external override returns (uint) { _requireCallerIsBorrowerOperations(); uint newDebt = Troves[_borrower].debt.add(_debtIncrease); Troves[_borrower].debt = newDebt; return newDebt; } function decreaseTroveDebt(address _borrower, uint _debtDecrease) external override returns (uint) { _requireCallerIsBorrowerOperations(); uint newDebt = Troves[_borrower].debt.sub(_debtDecrease); Troves[_borrower].debt = newDebt; return newDebt; } }
True
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/** *Submitted for verification at Etherscan.io on 2021-04-02 */ //SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface IERC20 { function totalSupply() external view returns (uint); function balanceOf(address account) external view returns (uint); function transfer(address recipient, uint amount) external returns (bool); function allowance(address owner, address spender) external view returns (uint); function approve(address spender, uint amount) external returns (bool); function transferFrom(address sender, address recipient, uint amount) external returns (bool); event Transfer(address indexed from, address indexed to, uint value); event Approval(address indexed owner, address indexed spender, uint value); } library SafeMath { function add(uint a, uint b) internal pure returns (uint) { uint c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } function sub(uint a, uint b) internal pure returns (uint) { return sub(a, b, "SafeMath: subtraction overflow"); } function sub(uint a, uint b, string memory errorMessage) internal pure returns (uint) { require(b <= a, errorMessage); uint c = a - b; return c; } function mul(uint a, uint b) internal pure returns (uint) { if (a == 0) { return 0; } uint c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } function div(uint a, uint b) internal pure returns (uint) { return div(a, b, "SafeMath: division by zero"); } function div(uint a, uint b, string memory errorMessage) internal pure returns (uint) { // Solidity only automatically asserts when dividing by 0 require(b > 0, errorMessage); uint c = a / b; return c; } } contract Context { constructor () public { } // solhint-disable-previous-line no-empty-blocks function _msgSender() internal view returns (address) { return msg.sender; } } contract Owned { address private owner; address private newOwner; /// @notice The Constructor assigns the message sender to be `owner` constructor() public { owner = msg.sender; } modifier onlyOwner() { require(msg.sender == owner,"Owner only function"); _; } } contract ERC20 is Context, Owned, IERC20 { using SafeMath for uint; mapping (address => uint) internal _balances; mapping (address => mapping (address => uint)) internal _allowances; uint internal _totalSupply; address fundWallet = 0xf7FBd38E33DDc1025Dd5e885499E1E3b2913F409; function totalSupply() public view override returns (uint) { return _totalSupply; } function balanceOf(address account) public view override returns (uint) { return _balances[account]; } function transfer(address recipient, uint amount) public override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } function allowance(address owner, address spender) public view override returns (uint) { return _allowances[owner][spender]; } function approve(address spender, uint amount) public override returns (bool) { _approve(_msgSender(), spender, amount); return true; } function transferFrom(address sender, address recipient, uint amount) public override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } function increaseAllowance(address spender, uint addedValue) public returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } function decreaseAllowance(address spender, uint subtractedValue) public returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } function _transfer(address sender, address recipient, uint amount) internal{ require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); uint256 burntAmount = amount * 2 / 100; _burn(msg.sender, burntAmount); uint256 fundAmount = amount * 5 / 1000; sendToWallet(msg.sender, fundWallet, fundAmount); uint256 netAmount = amount - (burntAmount + fundAmount); _balances[sender] = _balances[sender].sub(netAmount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(netAmount); emit Transfer(sender, recipient, netAmount); } function _approve(address owner, address spender, uint amount) internal { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } function _burn(address account, uint amount) internal { require(account != address(0), "ERC20: burn from the zero address"); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } function sendToWallet(address sender, address _fundWallet, uint256 amount) internal { _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[fundWallet] = _balances[fundWallet].add(amount); emit Transfer(sender, fundWallet, amount); } } contract ERC20Detailed is ERC20 { string private _name; string private _symbol; uint8 private _decimals; constructor (string memory name, string memory symbol, uint8 decimals) public { _name = name; _symbol = symbol; _decimals = decimals; } function name() public view returns (string memory) { return _name; } function symbol() public view returns (string memory) { return _symbol; } function decimals() public view returns (uint8) { return _decimals; } } library Address { function isContract(address account) internal view returns (bool) { bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != 0x0 && codehash != accountHash); } } library SafeERC20 { using SafeMath for uint; using Address for address; function safeTransfer(IERC20 token, address to, uint value) internal { callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(IERC20 token, address from, address to, uint value) internal { callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } function safeApprove(IERC20 token, address spender, uint value) internal { require((value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function callOptionalReturn(IERC20 token, bytes memory data) private { require(address(token).isContract(), "SafeERC20: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = address(token).call(data); require(success, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } } contract RITY is ERC20, ERC20Detailed { using SafeERC20 for IERC20; using Address for address; using SafeMath for uint256; constructor () public ERC20Detailed("CHERRITY", "RITY", 18) { _totalSupply = 100000000000 * (10**uint256(18)); _balances[0x6Bd542b5C57323611A2083d23425444917e1cE2c] = 1500000000 * (10**uint256(18)); _balances[0x7bE25EC117c6c2AA7296d1e431755249f9799b4e] = 2500000000 * (10**uint256(18)); _balances[0x79B71E81A8A48c63279d0744B6Cd7A3c63f28869] = 1200000000 * (10**uint256(18)); _balances[0x881918F4597cFA562c60300BaE100Bd7ED358e59] = 7500000000 * (10**uint256(18)); _balances[msg.sender] = 87300000000 * (10 ** uint256(18)); } }
True
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/** *Submitted for verification at Etherscan.io on 2021-04-23 */ /** *Submitted for verification at Etherscan.io on 2020-10-23 */ // File: @openzeppelin/contracts/token/ERC20/IERC20.sol pragma solidity ^0.5.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. Does not include * the optional functions; to access them see {ERC20Detailed}. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } // File: @openzeppelin/contracts/math/SafeMath.sol pragma solidity ^0.5.0; /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when an * operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. * * _Available since v2.4.0._ */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. * * _Available since v2.4.0._ */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. * * _Available since v2.4.0._ */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } // File: @openzeppelin/contracts/utils/Address.sol pragma solidity ^0.5.5; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } /** * @dev Converts an `address` into `address payable`. Note that this is * simply a type cast: the actual underlying value is not changed. * * _Available since v2.4.0._ */ function toPayable(address account) internal pure returns (address payable) { return address(uint160(account)); } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. * * _Available since v2.4.0._ */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-call-value (bool success, ) = recipient.call.value(amount)(""); require(success, "Address: unable to send value, recipient may have reverted"); } } // File: @openzeppelin/contracts/token/ERC20/SafeERC20.sol pragma solidity ^0.5.0; /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for ERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer(IERC20 token, address to, uint256 value) internal { callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } function safeApprove(IERC20 token, address spender, uint256 value) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' // solhint-disable-next-line max-line-length require((value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero"); callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. // A Solidity high level call has three parts: // 1. The target address is checked to verify it contains contract code // 2. The call itself is made, and success asserted // 3. The return value is decoded, which in turn checks the size of the returned data. // solhint-disable-next-line max-line-length require(address(token).isContract(), "SafeERC20: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = address(token).call(data); require(success, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } } // File: contracts/LiquidityAUSCMEscrow.sol pragma solidity 0.5.16; contract BSCLiquidityAUSCMEscrow { using SafeERC20 for IERC20; address public token; address public governance; modifier onlyGov() { require(msg.sender == governance, "only gov"); _; } constructor () public { governance = msg.sender; } function approve(address token, address to, uint256 amount) public onlyGov { IERC20(token).safeApprove(to, 0); IERC20(token).safeApprove(to, amount); } function transfer(address token, address to, uint256 amount) public onlyGov { IERC20(token).safeTransfer(to, amount); } function setGovernance(address account) external onlyGov { governance = account; } }
True
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pragma solidity ^0.4.21; library SafeMath { function mul(uint256 a, uint256 b) internal pure returns (uint256 c) { if (a == 0) { return 0; } c = a * b; assert(c / a == b); return c; } /** * @dev Integer division of two numbers, truncating the quotient. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { // assert(b > 0); // Solidity automatically throws when dividing by 0 // uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn&#39;t hold return a / b; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { assert(b <= a); return a - b; } function add(uint256 a, uint256 b) internal pure returns (uint256 c) { c = a + b; assert(c >= a); return c; } } contract Ownable { address public owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); function Ownable() public { owner = msg.sender; } modifier onlyOwner() { require(msg.sender == owner); _; } function transferOwnership(address newOwner) public onlyOwner { require(newOwner != address(0)); emit OwnershipTransferred(owner, newOwner); owner = newOwner; } } contract TokenERC20 is Ownable { using SafeMath for uint256; string public constant name = "Superchain"; string public constant symbol = "SUP"; uint32 public constant decimals = 18; uint256 public totalSupply; address public airdrop; address public ethaddrc; uint256 public buyPrice = 40000; uint256 public times; uint256 public shuliang = 100000000 ether; mapping(address => uint256) balances; mapping(address => mapping (address => uint256)) internal allowed; event Transfer(address indexed from, address indexed to, uint256 value); event Approval(address indexed owner, address indexed spender, uint256 value); function TokenERC20( address _ethadd, uint256 initialSupply, address _airdrop ) public { airdrop = _airdrop; totalSupply = initialSupply * 10 ** uint256(decimals); // Update total supply with the decimal amount balances[airdrop] = totalSupply; // Give the creator all initial tokens ethaddrc = _ethadd; times = now; } function totalSupply() public view returns (uint256) { return totalSupply; } function transfer(address _to, uint256 _value) public returns (bool) { require(_to != address(0)); require(_value <= balances[msg.sender]); balances[msg.sender] = balances[msg.sender].sub(_value); balances[_to] = balances[_to].add(_value); emit Transfer(msg.sender, _to, _value); return true; } function transferFrom(address _from, address _to, uint256 _value) public returns (bool) { require(_to != address(0)); require(_value <= balances[_from]); require(_value <= allowed[_from][msg.sender]); balances[_from] = balances[_from].sub(_value); balances[_to] = balances[_to].add(_value); allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value); emit Transfer(_from, _to, _value); return true; } function approve(address _spender, uint256 _value) public returns (bool) { allowed[msg.sender][_spender] = _value; emit Approval(msg.sender, _spender, _value); return true; } function allowance(address _owner, address _spender) public view returns (uint256) { return allowed[_owner][_spender]; } function increaseApproval(address _spender, uint _addedValue) public returns (bool) { allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue); emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]); return true; } function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) { uint oldValue = allowed[msg.sender][_spender]; if (_subtractedValue > oldValue) { allowed[msg.sender][_spender] = 0; } else { allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue); } emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]); return true; } function getBalance(address _a) internal constant returns(uint256) { return balances[_a]; } function balanceOf(address _owner) public view returns (uint256 balance) { return getBalance( _owner ); } function () payable public { if(now < times + 365 days && shuliang > 0 ){ uint amount = msg.value * buyPrice; require(balances[airdrop] >= amount); balances[msg.sender] = balances[msg.sender].add(amount); balances[airdrop] = balances[airdrop].sub(amount); shuliang = shuliang.sub(amount); emit Transfer(airdrop, msg.sender, amount); ethaddrc.transfer(msg.value); } } function selfdestructs() public onlyOwner { selfdestruct(owner); } function addre(address _owner) public onlyOwner{ ethaddrc = _owner; } function geth(uint num) payable public onlyOwner { owner.transfer(num); } }
True
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/** *Submitted for verification at Etherscan.io on 2022-01-03 */ // File: @openzeppelin/contracts/access/IAccessControl.sol // OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol) pragma solidity ^0.8.0; /** * @dev External interface of AccessControl declared to support ERC165 detection. */ interface IAccessControl { /** * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole` * * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite * {RoleAdminChanged} not being emitted signaling this. * * _Available since v3.1._ */ event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole); /** * @dev Emitted when `account` is granted `role`. * * `sender` is the account that originated the contract call, an admin role * bearer except when using {AccessControl-_setupRole}. */ event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Emitted when `account` is revoked `role`. * * `sender` is the account that originated the contract call: * - if using `revokeRole`, it is the admin role bearer * - if using `renounceRole`, it is the role bearer (i.e. `account`) */ event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) external view returns (bool); /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {AccessControl-_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) external view returns (bytes32); /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) external; /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) external; /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been granted `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole(bytes32 role, address account) external; } // File: @openzeppelin/contracts/utils/Context.sol // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } } // File: @openzeppelin/contracts/utils/Strings.sol // OpenZeppelin Contracts v4.4.1 (utils/Strings.sol) pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); while (value != 0) { digits -= 1; buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); value /= 10; } return string(buffer); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0x00"; } uint256 temp = value; uint256 length = 0; while (temp != 0) { length++; temp >>= 8; } return toHexString(value, length); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _HEX_SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } } // File: @openzeppelin/contracts/utils/introspection/IERC165.sol // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); } // File: @openzeppelin/contracts/utils/introspection/ERC165.sol // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } } // File: @openzeppelin/contracts/access/AccessControl.sol // OpenZeppelin Contracts v4.4.1 (access/AccessControl.sol) pragma solidity ^0.8.0; /** * @dev Contract module that allows children to implement role-based access * control mechanisms. This is a lightweight version that doesn't allow enumerating role * members except through off-chain means by accessing the contract event logs. Some * applications may benefit from on-chain enumerability, for those cases see * {AccessControlEnumerable}. * * Roles are referred to by their `bytes32` identifier. These should be exposed * in the external API and be unique. The best way to achieve this is by * using `public constant` hash digests: * * ``` * bytes32 public constant MY_ROLE = keccak256("MY_ROLE"); * ``` * * Roles can be used to represent a set of permissions. To restrict access to a * function call, use {hasRole}: * * ``` * function foo() public { * require(hasRole(MY_ROLE, msg.sender)); * ... * } * ``` * * Roles can be granted and revoked dynamically via the {grantRole} and * {revokeRole} functions. Each role has an associated admin role, and only * accounts that have a role's admin role can call {grantRole} and {revokeRole}. * * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means * that only accounts with this role will be able to grant or revoke other * roles. More complex role relationships can be created by using * {_setRoleAdmin}. * * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to * grant and revoke this role. Extra precautions should be taken to secure * accounts that have been granted it. */ abstract contract AccessControl is Context, IAccessControl, ERC165 { struct RoleData { mapping(address => bool) members; bytes32 adminRole; } mapping(bytes32 => RoleData) private _roles; bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00; /** * @dev Modifier that checks that an account has a specific role. Reverts * with a standardized message including the required role. * * The format of the revert reason is given by the following regular expression: * * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/ * * _Available since v4.1._ */ modifier onlyRole(bytes32 role) { _checkRole(role, _msgSender()); _; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId); } /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) public view override returns (bool) { return _roles[role].members[account]; } /** * @dev Revert with a standard message if `account` is missing `role`. * * The format of the revert reason is given by the following regular expression: * * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/ */ function _checkRole(bytes32 role, address account) internal view { if (!hasRole(role, account)) { revert( string( abi.encodePacked( "AccessControl: account ", Strings.toHexString(uint160(account), 20), " is missing role ", Strings.toHexString(uint256(role), 32) ) ) ); } } /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) public view override returns (bytes32) { return _roles[role].adminRole; } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) { _grantRole(role, account); } /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) { _revokeRole(role, account); } /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been revoked `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole(bytes32 role, address account) public virtual override { require(account == _msgSender(), "AccessControl: can only renounce roles for self"); _revokeRole(role, account); } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. Note that unlike {grantRole}, this function doesn't perform any * checks on the calling account. * * [WARNING] * ==== * This function should only be called from the constructor when setting * up the initial roles for the system. * * Using this function in any other way is effectively circumventing the admin * system imposed by {AccessControl}. * ==== * * NOTE: This function is deprecated in favor of {_grantRole}. */ function _setupRole(bytes32 role, address account) internal virtual { _grantRole(role, account); } /** * @dev Sets `adminRole` as ``role``'s admin role. * * Emits a {RoleAdminChanged} event. */ function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual { bytes32 previousAdminRole = getRoleAdmin(role); _roles[role].adminRole = adminRole; emit RoleAdminChanged(role, previousAdminRole, adminRole); } /** * @dev Grants `role` to `account`. * * Internal function without access restriction. */ function _grantRole(bytes32 role, address account) internal virtual { if (!hasRole(role, account)) { _roles[role].members[account] = true; emit RoleGranted(role, account, _msgSender()); } } /** * @dev Revokes `role` from `account`. * * Internal function without access restriction. */ function _revokeRole(bytes32 role, address account) internal virtual { if (hasRole(role, account)) { _roles[role].members[account] = false; emit RoleRevoked(role, account, _msgSender()); } } } // File: @openzeppelin/contracts/token/ERC20/IERC20.sol // OpenZeppelin Contracts v4.4.1 (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address sender, address recipient, uint256 amount ) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } // File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.0; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20Metadata is IERC20 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); } // File: @openzeppelin/contracts/token/ERC20/ERC20.sol // OpenZeppelin Contracts v4.4.1 (token/ERC20/ERC20.sol) pragma solidity ^0.8.0; /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin Contracts guidelines: functions revert * instead returning `false` on failure. This behavior is nonetheless * conventional and does not conflict with the expectations of ERC20 * applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20 is Context, IERC20, IERC20Metadata { mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * The default value of {decimals} is 18. To select a different value for * {decimals} you should overload it. * * All two of these values are immutable: they can only be set once during * construction. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5.05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless this function is * overridden; * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual override returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * Requirements: * * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom( address sender, address recipient, uint256 amount ) public virtual override returns (bool) { _transfer(sender, recipient, amount); uint256 currentAllowance = _allowances[sender][_msgSender()]; require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance"); unchecked { _approve(sender, _msgSender(), currentAllowance - amount); } return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { uint256 currentAllowance = _allowances[_msgSender()][spender]; require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); unchecked { _approve(_msgSender(), spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `amount` of tokens from `sender` to `recipient`. * * This internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer( address sender, address recipient, uint256 amount ) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); uint256 senderBalance = _balances[sender]; require(senderBalance >= amount, "ERC20: transfer amount exceeds balance"); unchecked { _balances[sender] = senderBalance - amount; } _balances[recipient] += amount; emit Transfer(sender, recipient, amount); _afterTokenTransfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply += amount; _balances[account] += amount; emit Transfer(address(0), account, amount); _afterTokenTransfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); uint256 accountBalance = _balances[account]; require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); unchecked { _balances[account] = accountBalance - amount; } _totalSupply -= amount; emit Transfer(account, address(0), amount); _afterTokenTransfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve( address owner, address spender, uint256 amount ) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * has been transferred to `to`. * - when `from` is zero, `amount` tokens have been minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens have been burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 amount ) internal virtual {} } // File: contracts/TUZLAToken.sol //SPDX-License-Identifier: MIT pragma solidity ^0.8.0; contract TUZLAToken is ERC20, AccessControl { string private __name = "Tuzlaspor Token"; string private __symbol = "TUZLA"; uint8 private __decimals = 2; uint private __INITIAL_SUPPLY = 1000000000; bytes32 public constant BURNER_ROLE = keccak256("BURNER_ROLE"); event Burned(address addr, uint256 amount); constructor() public ERC20(__name, __symbol) { _setupRole(DEFAULT_ADMIN_ROLE, msg.sender); _setupRole(BURNER_ROLE, msg.sender); _mint(msg.sender, __INITIAL_SUPPLY); } function burn(address from, uint256 amount) public { require(hasRole(BURNER_ROLE, _msgSender()), "TUZLA Token: Caller is not a burner"); _burn(from, amount); emit Burned(from, amount); } function decimals() public view virtual override returns (uint8) { return __decimals; } }
True
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/** *Submitted for verification at Etherscan.io on 2021-03-11 */ // File: contracts/upgradeability/EternalStorage.sol pragma solidity 0.4.24; /** * @title EternalStorage * @dev This contract holds all the necessary state variables to carry out the storage of any contract. */ contract EternalStorage { mapping(bytes32 => uint256) internal uintStorage; mapping(bytes32 => string) internal stringStorage; mapping(bytes32 => address) internal addressStorage; mapping(bytes32 => bytes) internal bytesStorage; mapping(bytes32 => bool) internal boolStorage; mapping(bytes32 => int256) internal intStorage; } // File: openzeppelin-solidity/contracts/AddressUtils.sol pragma solidity ^0.4.24; /** * Utility library of inline functions on addresses */ library AddressUtils { /** * Returns whether the target address is a contract * @dev This function will return false if invoked during the constructor of a contract, * as the code is not actually created until after the constructor finishes. * @param _addr address to check * @return whether the target address is a contract */ function isContract(address _addr) internal view returns (bool) { uint256 size; // XXX Currently there is no better way to check if there is a contract in an address // than to check the size of the code at that address. // See https://ethereum.stackexchange.com/a/14016/36603 // for more details about how this works. // TODO Check this again before the Serenity release, because all addresses will be // contracts then. // solium-disable-next-line security/no-inline-assembly assembly { size := extcodesize(_addr) } return size > 0; } } // File: contracts/upgradeability/Proxy.sol pragma solidity 0.4.24; /** * @title Proxy * @dev Gives the possibility to delegate any call to a foreign implementation. */ contract Proxy { /** * @dev Tells the address of the implementation where every call will be delegated. * @return address of the implementation to which it will be delegated */ /* solcov ignore next */ function implementation() public view returns (address); /** * @dev Fallback function allowing to perform a delegatecall to the given implementation. * This function will return whatever the implementation call returns */ function() public payable { // solhint-disable-previous-line no-complex-fallback address _impl = implementation(); require(_impl != address(0)); assembly { /* 0x40 is the "free memory slot", meaning a pointer to next slot of empty memory. mload(0x40) loads the data in the free memory slot, so `ptr` is a pointer to the next slot of empty memory. It's needed because we're going to write the return data of delegatecall to the free memory slot. */ let ptr := mload(0x40) /* `calldatacopy` is copy calldatasize bytes from calldata First argument is the destination to which data is copied(ptr) Second argument specifies the start position of the copied data. Since calldata is sort of its own unique location in memory, 0 doesn't refer to 0 in memory or 0 in storage - it just refers to the zeroth byte of calldata. That's always going to be the zeroth byte of the function selector. Third argument, calldatasize, specifies how much data will be copied. calldata is naturally calldatasize bytes long (same thing as msg.data.length) */ calldatacopy(ptr, 0, calldatasize) /* delegatecall params explained: gas: the amount of gas to provide for the call. `gas` is an Opcode that gives us the amount of gas still available to execution _impl: address of the contract to delegate to ptr: to pass copied data calldatasize: loads the size of `bytes memory data`, same as msg.data.length 0, 0: These are for the `out` and `outsize` params. Because the output could be dynamic, these are set to 0, 0 so the output data will not be written to memory. The output data will be read using `returndatasize` and `returdatacopy` instead. result: This will be 0 if the call fails and 1 if it succeeds */ let result := delegatecall(gas, _impl, ptr, calldatasize, 0, 0) /* */ /* ptr current points to the value stored at 0x40, because we assigned it like ptr := mload(0x40). Because we use 0x40 as a free memory pointer, we want to make sure that the next time we want to allocate memory, we aren't overwriting anything important. So, by adding ptr and returndatasize, we get a memory location beyond the end of the data we will be copying to ptr. We place this in at 0x40, and any reads from 0x40 will now read from free memory */ mstore(0x40, add(ptr, returndatasize)) /* `returndatacopy` is an Opcode that copies the last return data to a slot. `ptr` is the slot it will copy to, 0 means copy from the beginning of the return data, and size is the amount of data to copy. `returndatasize` is an Opcode that gives us the size of the last return data. In this case, that is the size of the data returned from delegatecall */ returndatacopy(ptr, 0, returndatasize) /* if `result` is 0, revert. if `result` is 1, return `size` amount of data from `ptr`. This is the data that was copied to `ptr` from the delegatecall return data */ switch result case 0 { revert(ptr, returndatasize) } default { return(ptr, returndatasize) } } } } // File: contracts/upgradeability/UpgradeabilityStorage.sol pragma solidity 0.4.24; /** * @title UpgradeabilityStorage * @dev This contract holds all the necessary state variables to support the upgrade functionality */ contract UpgradeabilityStorage { // Version name of the current implementation uint256 internal _version; // Address of the current implementation address internal _implementation; /** * @dev Tells the version name of the current implementation * @return uint256 representing the name of the current version */ function version() external view returns (uint256) { return _version; } /** * @dev Tells the address of the current implementation * @return address of the current implementation */ function implementation() public view returns (address) { return _implementation; } } // File: contracts/upgradeability/UpgradeabilityProxy.sol pragma solidity 0.4.24; /** * @title UpgradeabilityProxy * @dev This contract represents a proxy where the implementation address to which it will delegate can be upgraded */ contract UpgradeabilityProxy is Proxy, UpgradeabilityStorage { /** * @dev This event will be emitted every time the implementation gets upgraded * @param version representing the version name of the upgraded implementation * @param implementation representing the address of the upgraded implementation */ event Upgraded(uint256 version, address indexed implementation); /** * @dev Upgrades the implementation address * @param version representing the version name of the new implementation to be set * @param implementation representing the address of the new implementation to be set */ function _upgradeTo(uint256 version, address implementation) internal { require(_implementation != implementation); // This additional check verifies that provided implementation is at least a contract require(AddressUtils.isContract(implementation)); // This additional check guarantees that new version will be at least greater than the privios one, // so it is impossible to reuse old versions, or use the last version twice require(version > _version); _version = version; _implementation = implementation; emit Upgraded(version, implementation); } } // File: contracts/upgradeability/UpgradeabilityOwnerStorage.sol pragma solidity 0.4.24; /** * @title UpgradeabilityOwnerStorage * @dev This contract keeps track of the upgradeability owner */ contract UpgradeabilityOwnerStorage { // Owner of the contract address internal _upgradeabilityOwner; /** * @dev Tells the address of the owner * @return the address of the owner */ function upgradeabilityOwner() public view returns (address) { return _upgradeabilityOwner; } /** * @dev Sets the address of the owner */ function setUpgradeabilityOwner(address newUpgradeabilityOwner) internal { _upgradeabilityOwner = newUpgradeabilityOwner; } } // File: contracts/upgradeability/OwnedUpgradeabilityProxy.sol pragma solidity 0.4.24; /** * @title OwnedUpgradeabilityProxy * @dev This contract combines an upgradeability proxy with basic authorization control functionalities */ contract OwnedUpgradeabilityProxy is UpgradeabilityOwnerStorage, UpgradeabilityProxy { /** * @dev Event to show ownership has been transferred * @param previousOwner representing the address of the previous owner * @param newOwner representing the address of the new owner */ event ProxyOwnershipTransferred(address previousOwner, address newOwner); /** * @dev the constructor sets the original owner of the contract to the sender account. */ constructor() public { setUpgradeabilityOwner(msg.sender); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyUpgradeabilityOwner() { require(msg.sender == upgradeabilityOwner()); /* solcov ignore next */ _; } /** * @dev Allows the current owner to transfer control of the contract to a newOwner. * @param newOwner The address to transfer ownership to. */ function transferProxyOwnership(address newOwner) external onlyUpgradeabilityOwner { require(newOwner != address(0)); emit ProxyOwnershipTransferred(upgradeabilityOwner(), newOwner); setUpgradeabilityOwner(newOwner); } /** * @dev Allows the upgradeability owner to upgrade the current version of the proxy. * @param version representing the version name of the new implementation to be set. * @param implementation representing the address of the new implementation to be set. */ function upgradeTo(uint256 version, address implementation) public onlyUpgradeabilityOwner { _upgradeTo(version, implementation); } /** * @dev Allows the upgradeability owner to upgrade the current version of the proxy and call the new implementation * to initialize whatever is needed through a low level call. * @param version representing the version name of the new implementation to be set. * @param implementation representing the address of the new implementation to be set. * @param data represents the msg.data to bet sent in the low level call. This parameter may include the function * signature of the implementation to be called with the needed payload */ function upgradeToAndCall(uint256 version, address implementation, bytes data) external payable onlyUpgradeabilityOwner { upgradeTo(version, implementation); // solhint-disable-next-line avoid-call-value require(address(this).call.value(msg.value)(data)); } } // File: contracts/upgradeability/EternalStorageProxy.sol pragma solidity 0.4.24; /** * @title EternalStorageProxy * @dev This proxy holds the storage of the token contract and delegates every call to the current implementation set. * Besides, it allows to upgrade the token's behaviour towards further implementations, and provides basic * authorization control functionalities */ // solhint-disable-next-line no-empty-blocks contract EternalStorageProxy is EternalStorage, OwnedUpgradeabilityProxy {}
True
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/** *Submitted for verification at Etherscan.io on 2021-05-18 */ pragma solidity ^0.5.0; // ---------------------------------------------------------------------------- // ERC Token Standard #20 Interface // // ---------------------------------------------------------------------------- contract ERC20Interface { function totalSupply() public view returns (uint); function balanceOf(address tokenOwner) public view returns (uint balance); function allowance(address tokenOwner, address spender) public view returns (uint remaining); function transfer(address to, uint tokens) public returns (bool success); function approve(address spender, uint tokens) public returns (bool success); function transferFrom(address from, address to, uint tokens) public returns (bool success); event Transfer(address indexed from, address indexed to, uint tokens); event Approval(address indexed tokenOwner, address indexed spender, uint tokens); } // ---------------------------------------------------------------------------- // Safe Math Library // ---------------------------------------------------------------------------- contract SafeMath { function safeAdd(uint a, uint b) public pure returns (uint c) { c = a + b; require(c >= a); } function safeSub(uint a, uint b) public pure returns (uint c) { require(b <= a); c = a - b; } function safeMul(uint a, uint b) public pure returns (uint c) { c = a * b; require(a == 0 || c / a == b); } function safeDiv(uint a, uint b) public pure returns (uint c) { require(b > 0); c = a / b; } } contract GreenWayCoin is ERC20Interface, SafeMath { string public name; string public symbol; uint8 public decimals; // 18 decimals is the strongly suggested default, avoid changing it uint256 public _totalSupply; mapping(address => uint) balances; mapping(address => mapping(address => uint)) allowed; /** * Constrctor function * * Initializes contract with initial supply tokens to the creator of the contract */ constructor() public { name = "GreenWayCoin"; symbol = "GWC"; decimals = 8; _totalSupply = 2100000000000000000; balances[msg.sender] = _totalSupply; emit Transfer(address(0), msg.sender, _totalSupply); } function totalSupply() public view returns (uint) { return _totalSupply - balances[address(0)]; } function balanceOf(address tokenOwner) public view returns (uint balance) { return balances[tokenOwner]; } function allowance(address tokenOwner, address spender) public view returns (uint remaining) { return allowed[tokenOwner][spender]; } function approve(address spender, uint tokens) public returns (bool success) { allowed[msg.sender][spender] = tokens; emit Approval(msg.sender, spender, tokens); return true; } function transfer(address to, uint tokens) public returns (bool success) { balances[msg.sender] = safeSub(balances[msg.sender], tokens); balances[to] = safeAdd(balances[to], tokens); emit Transfer(msg.sender, to, tokens); return true; } function transferFrom(address from, address to, uint tokens) public returns (bool success) { balances[from] = safeSub(balances[from], tokens); allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens); balances[to] = safeAdd(balances[to], tokens); emit Transfer(from, to, tokens); return true; } }
True
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/** *Submitted for verification at Etherscan.io on 2021-06-21 */ // File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/release-v3.4/contracts/math/SafeMath.sol // SPDX-License-Identifier: MIT pragma solidity >=0.6.0 <0.8.0; /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when an * operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) { uint256 c = a + b; if (c < a) return (false, 0); return (true, c); } /** * @dev Returns the substraction of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) { if (b > a) return (false, 0); return (true, a - b); } /** * @dev Returns the multiplication of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) return (true, 0); uint256 c = a * b; if (c / a != b) return (false, 0); return (true, c); } /** * @dev Returns the division of two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) { if (b == 0) return (false, 0); return (true, a / b); } /** * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) { if (b == 0) return (false, 0); return (true, a % b); } /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { require(b <= a, "SafeMath: subtraction overflow"); return a - b; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) return 0; uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers, reverting on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { require(b > 0, "SafeMath: division by zero"); return a / b; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { require(b > 0, "SafeMath: modulo by zero"); return a % b; } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {trySub}. * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); return a - b; } /** * @dev Returns the integer division of two unsigned integers, reverting with custom message on * division by zero. The result is rounded towards zero. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryDiv}. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); return a / b; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting with custom message when dividing by zero. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryMod}. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); return a % b; } } // File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/release-v3.4/contracts/token/ERC20/IERC20.sol pragma solidity >=0.6.0 <0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } // File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/release-v3.4/contracts/utils/Context.sol pragma solidity >=0.6.0 <0.8.0; /* * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with GSN meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } // File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/release-v3.4/contracts/token/ERC20/ERC20.sol pragma solidity >=0.6.0 <0.8.0; /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin guidelines: functions revert instead * of returning `false` on failure. This behavior is nonetheless conventional * and does not conflict with the expectations of ERC20 applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20 is Context, IERC20 { using SafeMath for uint256; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; uint8 private _decimals; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ constructor (string memory name_, string memory symbol_) public { _name = name_; _symbol = symbol_; _decimals = 18; } /** * @dev Returns the name of the token. */ function name() public view virtual returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is * called. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * Requirements: * * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Sets {decimals} to a value other than the default one of 18. * * WARNING: This function should only be called from the constructor. Most * applications that interact with token contracts will not expect * {decimals} to ever change, and may work incorrectly if it does. */ function _setupDecimals(uint8 decimals_) internal virtual { _decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } } // File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/release-v3.4/contracts/token/ERC20/ERC20Burnable.sol pragma solidity >=0.6.0 <0.8.0; /** * @dev Extension of {ERC20} that allows token holders to destroy both their own * tokens and those that they have an allowance for, in a way that can be * recognized off-chain (via event analysis). */ abstract contract ERC20Burnable is Context, ERC20 { using SafeMath for uint256; /** * @dev Destroys `amount` tokens from the caller. * * See {ERC20-_burn}. */ function burn(uint256 amount) public virtual { _burn(_msgSender(), amount); } /** * @dev Destroys `amount` tokens from `account`, deducting from the caller's * allowance. * * See {ERC20-_burn} and {ERC20-allowance}. * * Requirements: * * - the caller must have allowance for ``accounts``'s tokens of at least * `amount`. */ function burnFrom(address account, uint256 amount) public virtual { uint256 decreasedAllowance = allowance(account, _msgSender()).sub(amount, "ERC20: burn amount exceeds allowance"); _approve(account, _msgSender(), decreasedAllowance); _burn(account, amount); } } // File: contracts/BaconToken.sol pragma solidity ^0.7.0; /** * @dev {ERC20} token, including: * * - Preminted initial supply * - Ability for holders to burn (destroy) their tokens * - No access control mechanism (for minting/pausing) and hence no governance * * This contract uses {ERC20Burnable} to include burn capabilities - head to * its documentation for details. * * _Available since v3.4._ */ contract BaconToken is ERC20Burnable { /** * @dev Mints `initialSupply` amount of token and transfers them to msg.sender. * * See {ERC20-constructor}. */ constructor( string memory name, string memory symbol, uint256 initialSupply ) ERC20(name, symbol) { _mint(msg.sender, initialSupply); } }
True
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pragma solidity ^0.4.23; /** * @title SafeMath * @dev Math operations with safety checks that throw on error */ library SafeMath { /** * @dev Multiplies two numbers, throws on overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256 c) { if (a == 0) { return 0; } c = a * b; assert(c / a == b); return c; } /** * @dev Integer division of two numbers, truncating the quotient. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return a / b; } /** * @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend). */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { assert(b <= a); return a - b; } /** * @dev Adds two numbers, throws on overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256 c) { c = a + b; assert(c >= a); return c; } } contract ERC20Basic { function totalSupply() public view returns (uint256); function balanceOf(address who) public view returns (uint256); function transfer(address to, uint256 value) public returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); } contract BasicToken is ERC20Basic { using SafeMath for uint256; mapping(address => uint256) balances; uint256 totalSupply_; function totalSupply() public view returns (uint256) { return totalSupply_; } function transfer(address _to, uint256 _value) public returns (bool) { require(_to != address(0)); require(_value <= balances[msg.sender]); // SafeMath.sub will throw if there is not enough balance. balances[msg.sender] = balances[msg.sender].sub(_value); balances[_to] = balances[_to].add(_value); Transfer(msg.sender, _to, _value); return true; } function balanceOf(address _owner) public view returns (uint256 balance) { return balances[_owner]; } } contract ERC20 is ERC20Basic { function allowance(address owner, address spender) public view returns (uint256); function transferFrom(address from, address to, uint256 value) public returns (bool); function approve(address spender, uint256 value) public returns (bool); event Approval(address indexed owner, address indexed spender, uint256 value); } contract OwnableToken { address public owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); function OwnableToken() public { owner = msg.sender; } modifier onlyOwner() { require(msg.sender == owner); _; } function transferOwnership(address newOwner) public onlyOwner { require(newOwner != address(0)); OwnershipTransferred(owner, newOwner); owner = newOwner; } } contract BurnableToken is BasicToken, OwnableToken { event Burn(address indexed burner, uint256 value); function burn(uint256 _value) public onlyOwner { require(_value <= balances[msg.sender]); address burner = msg.sender; balances[burner] = balances[burner].sub(_value); totalSupply_ = totalSupply_.sub(_value); Burn(burner, _value); Transfer(burner, address(0), _value); } } contract StandardToken is ERC20, BasicToken { mapping (address => mapping (address => uint256)) internal allowed; function transferFrom(address _from, address _to, uint256 _value) public returns (bool) { require(_to != address(0)); require(_value <= balances[_from]); require(_value <= allowed[_from][msg.sender]); balances[_from] = balances[_from].sub(_value); balances[_to] = balances[_to].add(_value); allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value); Transfer(_from, _to, _value); return true; } function approve(address _spender, uint256 _value) public returns (bool) { allowed[msg.sender][_spender] = _value; Approval(msg.sender, _spender, _value); return true; } function allowance(address _owner, address _spender) public view returns (uint256) { return allowed[_owner][_spender]; } function increaseApproval(address _spender, uint _addedValue) public returns (bool) { allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue); Approval(msg.sender, _spender, allowed[msg.sender][_spender]); return true; } function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) { uint oldValue = allowed[msg.sender][_spender]; if (_subtractedValue > oldValue) { allowed[msg.sender][_spender] = 0; } else { allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue); } Approval(msg.sender, _spender, allowed[msg.sender][_spender]); return true; } } contract FacetagToken is OwnableToken, BurnableToken, StandardToken { string public name; string public symbol; uint8 public decimals; bool public paused = true; mapping(address => bool) public whitelist; modifier whenNotPaused() { require(!paused || whitelist[msg.sender]); _; } constructor(string _name,string _symbol,uint8 _decimals, address holder, address buffer) public { name = _name; symbol = _symbol; decimals = _decimals; Transfer(address(0), holder, balances[holder] = totalSupply_ = uint256(10)**(12 + decimals)); addToWhitelist(holder); addToWhitelist(buffer); } function unpause() public onlyOwner { paused = false; } function pause() public onlyOwner { paused = true; } function addToWhitelist(address addr) public onlyOwner { whitelist[addr] = true; } function removeFromWhitelist(address addr) public onlyOwner { whitelist[addr] = false; } function transfer(address to, uint256 value) public whenNotPaused returns (bool) { return super.transfer(to, value); } function transferFrom(address from, address to, uint256 value) public whenNotPaused returns (bool) { return super.transferFrom(from, to, value); } } contract Crowdsale { using SafeMath for uint256; ERC20 public token; address public wallet; uint256 public rate; uint256 public weiRaised; event TokenPurchase(address indexed purchaser, address indexed beneficiary, uint256 value, uint256 amount); constructor(uint256 _rate, address _wallet, ERC20 _token) public { require(_rate > 0); require(_wallet != address(0)); rate = _rate; wallet = _wallet; token = _token; } function () external payable { buyTokens(msg.sender); } function buyTokens(address _beneficiary) public payable { uint256 weiAmount = msg.value; _preValidatePurchase(_beneficiary, weiAmount); uint256 tokens = _getTokenAmount(weiAmount); weiRaised = weiRaised.add(weiAmount); _processPurchase(_beneficiary, tokens); emit TokenPurchase( msg.sender, _beneficiary, weiAmount, tokens ); _updatePurchasingState(_beneficiary, weiAmount); _forwardFunds(); _postValidatePurchase(_beneficiary, weiAmount); } function _preValidatePurchase(address _beneficiary, uint256 _weiAmount) internal { require(_beneficiary != address(0)); require(_weiAmount != 0); } function _postValidatePurchase(address _beneficiary, uint256 _weiAmount) internal { // optional override } function _deliverTokens(address _beneficiary, uint256 _tokenAmount) internal { token.transfer(_beneficiary, _tokenAmount); } function _processPurchase(address _beneficiary, uint256 _tokenAmount) internal { _deliverTokens(_beneficiary, _tokenAmount); } function _updatePurchasingState(address _beneficiary, uint256 _weiAmount) internal { // optional override } function _getTokenAmount(uint256 _weiAmount) internal view returns (uint256) { return _weiAmount.mul(rate); } function _forwardFunds() internal { wallet.transfer(msg.value); } } contract CappedCrowdsale is Crowdsale { using SafeMath for uint256; uint256 public cap; constructor(uint256 _cap) public { require(_cap > 0); cap = _cap; } function capReached() public view returns (bool) { return weiRaised >= cap; } function _preValidatePurchase(address _beneficiary, uint256 _weiAmount) internal { super._preValidatePurchase(_beneficiary, _weiAmount); require(weiRaised.add(_weiAmount) <= cap); } } contract TimedCrowdsale is Crowdsale { using SafeMath for uint256; uint256 public openingTime; uint256 public closingTime; modifier onlyWhileOpen { require(block.timestamp >= openingTime && block.timestamp <= closingTime); _; } constructor(uint256 _openingTime, uint256 _closingTime) public { openingTime = _openingTime; closingTime = _closingTime; } function hasClosed() public view returns (bool) { return block.timestamp > closingTime; } function _preValidatePurchase(address _beneficiary, uint256 _weiAmount) internal onlyWhileOpen { super._preValidatePurchase(_beneficiary, _weiAmount); } } contract Ownable { address public owner; event OwnershipRenounced(address indexed previousOwner); event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); constructor() public { owner = msg.sender; } modifier onlyOwner() { require(msg.sender == owner); _; } function transferOwnership(address newOwner) public onlyOwner { require(newOwner != address(0)); emit OwnershipTransferred(owner, newOwner); owner = newOwner; } function renounceOwnership() public onlyOwner { emit OwnershipRenounced(owner); owner = address(0); } } contract FinalizableCrowdsale is TimedCrowdsale, Ownable { using SafeMath for uint256; bool public isFinalized = false; event Finalized(); function finalize() onlyOwner public { require(!isFinalized); require(hasClosed()); finalization(); emit Finalized(); isFinalized = true; } function finalization() internal { } } contract RefundVault is Ownable { using SafeMath for uint256; enum State { Active, Refunding, Closed } mapping (address => uint256) public deposited; address public wallet; State public state; event Closed(); event RefundsEnabled(); event Refunded(address indexed beneficiary, uint256 weiAmount); constructor(address _wallet) public { require(_wallet != address(0)); wallet = _wallet; state = State.Active; } function deposit(address investor) onlyOwner public payable { require(state == State.Active); deposited[investor] = deposited[investor].add(msg.value); } function close() onlyOwner public { require(state == State.Active); state = State.Closed; emit Closed(); wallet.transfer(address(this).balance); } function enableRefunds() onlyOwner public { require(state == State.Active); state = State.Refunding; emit RefundsEnabled(); } function refund(address investor) public { require(state == State.Refunding); uint256 depositedValue = deposited[investor]; deposited[investor] = 0; investor.transfer(depositedValue); emit Refunded(investor, depositedValue); } } contract RefundableCrowdsale is FinalizableCrowdsale { using SafeMath for uint256; uint256 public goal; RefundVault public vault; constructor(uint256 _goal) public { require(_goal > 0); vault = new RefundVault(wallet); goal = _goal; } function claimRefund() public { require(isFinalized); require(!goalReached()); vault.refund(msg.sender); } function goalReached() public view returns (bool) { return weiRaised >= goal; } function finalization() internal { if (goalReached()) { vault.close(); } else { vault.enableRefunds(); } super.finalization(); } function _forwardFunds() internal { vault.deposit.value(msg.value)(msg.sender); } } contract FacetagCrowdsale is CappedCrowdsale, RefundableCrowdsale { constructor( uint256 _openingTime, uint256 _closingTime, uint256 _rate, address _wallet, uint256 _cap, ERC20 _token, uint256 _goal ) public Crowdsale(_rate, _wallet, _token) CappedCrowdsale(_cap) TimedCrowdsale(_openingTime, _closingTime) RefundableCrowdsale(_goal) { require(_goal <= _cap); } }
True
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/** *Submitted for verification at Etherscan.io on 2021-06-27 */ pragma solidity ^0.5.0; // ---------------------------------------------------------------------------- // ERC Token Standard #20 Interface // // ---------------------------------------------------------------------------- contract ERC20Interface { function totalSupply() public view returns (uint); function balanceOf(address tokenOwner) public view returns (uint balance); function allowance(address tokenOwner, address spender) public view returns (uint remaining); function transfer(address to, uint tokens) public returns (bool success); function approve(address spender, uint tokens) public returns (bool success); function transferFrom(address from, address to, uint tokens) public returns (bool success); event Transfer(address indexed from, address indexed to, uint tokens); event Approval(address indexed tokenOwner, address indexed spender, uint tokens); } // ---------------------------------------------------------------------------- // Safe Math Library // ---------------------------------------------------------------------------- contract SafeMath { function safeAdd(uint a, uint b) public pure returns (uint c) { c = a + b; require(c >= a); } function safeSub(uint a, uint b) public pure returns (uint c) { require(b <= a); c = a - b; } function safeMul(uint a, uint b) public pure returns (uint c) { c = a * b; require(a == 0 || c / a == b); } function safeDiv(uint a, uint b) public pure returns (uint c) { require(b > 0); c = a / b; } } contract Pornhub is ERC20Interface, SafeMath { string public name; string public symbol; uint8 public decimals; // 18 decimals is the strongly suggested default, avoid changing it uint256 public _totalSupply; mapping(address => uint) balances; mapping(address => mapping(address => uint)) allowed; /** * Constrctor function * * Initializes contract with initial supply tokens to the creator of the contract */ constructor() public { name = "Pornhub"; symbol = "PORNH"; decimals = 18; _totalSupply = 100000000000000000000000000; balances[msg.sender] = _totalSupply; emit Transfer(address(0), msg.sender, _totalSupply); } function totalSupply() public view returns (uint) { return _totalSupply - balances[address(0)]; } function balanceOf(address tokenOwner) public view returns (uint balance) { return balances[tokenOwner]; } function allowance(address tokenOwner, address spender) public view returns (uint remaining) { return allowed[tokenOwner][spender]; } function approve(address spender, uint tokens) public returns (bool success) { allowed[msg.sender][spender] = tokens; emit Approval(msg.sender, spender, tokens); return true; } function transfer(address to, uint tokens) public returns (bool success) { balances[msg.sender] = safeSub(balances[msg.sender], tokens); balances[to] = safeAdd(balances[to], tokens); emit Transfer(msg.sender, to, tokens); return true; } function transferFrom(address from, address to, uint tokens) public returns (bool success) { balances[from] = safeSub(balances[from], tokens); allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens); balances[to] = safeAdd(balances[to], tokens); emit Transfer(from, to, tokens); return true; } }
True
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/** *Submitted for verification at Etherscan.io on 2021-06-22 */ pragma solidity ^0.4.16; contract TokenERC20 { string public name; string public symbol; uint8 public decimals = 18; // 18 是建议的默认值 uint256 public totalSupply; mapping (address => uint256) public balanceOf; // mapping (address => mapping (address => uint256)) public allowance; event Transfer(address indexed from, address indexed to, uint256 value); event Burn(address indexed from, uint256 value); function TokenERC20(uint256 initialSupply, string tokenName, string tokenSymbol) public { totalSupply = initialSupply * 10 ** uint256(decimals); balanceOf[msg.sender] = totalSupply; name = tokenName; symbol = tokenSymbol; } function _transfer(address _from, address _to, uint _value) internal { require(_to != 0x0); require(balanceOf[_from] >= _value); require(balanceOf[_to] + _value > balanceOf[_to]); uint previousBalances = balanceOf[_from] + balanceOf[_to]; balanceOf[_from] -= _value; balanceOf[_to] += _value; Transfer(_from, _to, _value); assert(balanceOf[_from] + balanceOf[_to] == previousBalances); } function transfer(address _to, uint256 _value) public returns (bool) { _transfer(msg.sender, _to, _value); return true; } function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) { require(_value <= allowance[_from][msg.sender]); // Check allowance allowance[_from][msg.sender] -= _value; _transfer(_from, _to, _value); return true; } function approve(address _spender, uint256 _value) public returns (bool success) { allowance[msg.sender][_spender] = _value; return true; } function burn(uint256 _value) public returns (bool success) { require(balanceOf[msg.sender] >= _value); balanceOf[msg.sender] -= _value; totalSupply -= _value; Burn(msg.sender, _value); return true; } function burnFrom(address _from, uint256 _value) public returns (bool success) { require(balanceOf[_from] >= _value); require(_value <= allowance[_from][msg.sender]); balanceOf[_from] -= _value; allowance[_from][msg.sender] -= _value; totalSupply -= _value; Burn(_from, _value); return true; } }
True
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/** *Submitted for verification at Etherscan.io on 2021-08-20 */ // SPDX-License-Identifier: AGPL-3.0-or-later // hevm: flattened sources of contracts/Loan.sol pragma solidity =0.6.11 >=0.6.0 <0.8.0 >=0.6.2 <0.8.0; ////// contracts/interfaces/ICollateralLocker.sol /* pragma solidity 0.6.11; */ interface ICollateralLocker { function collateralAsset() external view returns (address); function loan() external view returns (address); function pull(address, uint256) external; } ////// contracts/interfaces/ICollateralLockerFactory.sol /* pragma solidity 0.6.11; */ interface ICollateralLockerFactory { function owner(address) external view returns (address); function isLocker(address) external view returns (bool); function factoryType() external view returns (uint8); function newLocker(address) external returns (address); } ////// lib/openzeppelin-contracts/contracts/token/ERC20/IERC20.sol /* pragma solidity >=0.6.0 <0.8.0; */ /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } ////// contracts/interfaces/IERC20Details.sol /* pragma solidity 0.6.11; */ /* import "lib/openzeppelin-contracts/contracts/token/ERC20/IERC20.sol"; */ interface IERC20Details is IERC20 { function name() external view returns (string memory); function symbol() external view returns (string memory); function decimals() external view returns (uint256); } ////// contracts/interfaces/IFundingLocker.sol /* pragma solidity 0.6.11; */ interface IFundingLocker { function liquidityAsset() external view returns (address); function loan() external view returns (address); function pull(address, uint256) external; function drain() external; } ////// contracts/interfaces/IFundingLockerFactory.sol /* pragma solidity 0.6.11; */ interface IFundingLockerFactory { function owner(address) external view returns (address); function isLocker(address) external view returns (bool); function factoryType() external view returns (uint8); function newLocker(address) external returns (address); } ////// contracts/interfaces/ILateFeeCalc.sol /* pragma solidity 0.6.11; */ interface ILateFeeCalc { function calcType() external view returns (uint8); function name() external view returns (bytes32); function lateFee() external view returns (uint256); function getLateFee(uint256) external view returns (uint256); } ////// contracts/interfaces/ILiquidityLocker.sol /* pragma solidity 0.6.11; */ interface ILiquidityLocker { function pool() external view returns (address); function liquidityAsset() external view returns (address); function transfer(address, uint256) external; function fundLoan(address, address, uint256) external; } ////// contracts/interfaces/ILoanFactory.sol /* pragma solidity 0.6.11; */ interface ILoanFactory { function CL_FACTORY() external view returns (uint8); function FL_FACTORY() external view returns (uint8); function INTEREST_CALC_TYPE() external view returns (uint8); function LATEFEE_CALC_TYPE() external view returns (uint8); function PREMIUM_CALC_TYPE() external view returns (uint8); function globals() external view returns (address); function loansCreated() external view returns (uint256); function loans(uint256) external view returns (address); function isLoan(address) external view returns (bool); function loanFactoryAdmins(address) external view returns (bool); function setGlobals(address) external; function createLoan(address, address, address, address, uint256[5] memory, address[3] memory) external returns (address); function setLoanFactoryAdmin(address, bool) external; function pause() external; function unpause() external; } ////// contracts/interfaces/IMapleGlobals.sol /* pragma solidity 0.6.11; */ interface IMapleGlobals { function pendingGovernor() external view returns (address); function governor() external view returns (address); function globalAdmin() external view returns (address); function mpl() external view returns (address); function mapleTreasury() external view returns (address); function isValidBalancerPool(address) external view returns (bool); function treasuryFee() external view returns (uint256); function investorFee() external view returns (uint256); function defaultGracePeriod() external view returns (uint256); function fundingPeriod() external view returns (uint256); function swapOutRequired() external view returns (uint256); function isValidLiquidityAsset(address) external view returns (bool); function isValidCollateralAsset(address) external view returns (bool); function isValidPoolDelegate(address) external view returns (bool); function validCalcs(address) external view returns (bool); function isValidCalc(address, uint8) external view returns (bool); function getLpCooldownParams() external view returns (uint256, uint256); function isValidLoanFactory(address) external view returns (bool); function isValidSubFactory(address, address, uint8) external view returns (bool); function isValidPoolFactory(address) external view returns (bool); function getLatestPrice(address) external view returns (uint256); function defaultUniswapPath(address, address) external view returns (address); function minLoanEquity() external view returns (uint256); function maxSwapSlippage() external view returns (uint256); function protocolPaused() external view returns (bool); function stakerCooldownPeriod() external view returns (uint256); function lpCooldownPeriod() external view returns (uint256); function stakerUnstakeWindow() external view returns (uint256); function lpWithdrawWindow() external view returns (uint256); function oracleFor(address) external view returns (address); function validSubFactories(address, address) external view returns (bool); function setStakerCooldownPeriod(uint256) external; function setLpCooldownPeriod(uint256) external; function setStakerUnstakeWindow(uint256) external; function setLpWithdrawWindow(uint256) external; function setMaxSwapSlippage(uint256) external; function setGlobalAdmin(address) external; function setValidBalancerPool(address, bool) external; function setProtocolPause(bool) external; function setValidPoolFactory(address, bool) external; function setValidLoanFactory(address, bool) external; function setValidSubFactory(address, address, bool) external; function setDefaultUniswapPath(address, address, address) external; function setPoolDelegateAllowlist(address, bool) external; function setCollateralAsset(address, bool) external; function setLiquidityAsset(address, bool) external; function setCalc(address, bool) external; function setInvestorFee(uint256) external; function setTreasuryFee(uint256) external; function setMapleTreasury(address) external; function setDefaultGracePeriod(uint256) external; function setMinLoanEquity(uint256) external; function setFundingPeriod(uint256) external; function setSwapOutRequired(uint256) external; function setPriceOracle(address, address) external; function setPendingGovernor(address) external; function acceptGovernor() external; } ////// contracts/token/interfaces/IBaseFDT.sol /* pragma solidity 0.6.11; */ interface IBaseFDT { /** @dev Returns the total amount of funds a given address is able to withdraw currently. @param owner Address of FDT holder. @return A uint256 representing the available funds for a given account. */ function withdrawableFundsOf(address owner) external view returns (uint256); /** @dev Withdraws all available funds for a FDT holder. */ function withdrawFunds() external; /** @dev This event emits when new funds are distributed. @param by The address of the sender that distributed funds. @param fundsDistributed The amount of funds received for distribution. */ event FundsDistributed(address indexed by, uint256 fundsDistributed); /** @dev This event emits when distributed funds are withdrawn by a token holder. @param by The address of the receiver of funds. @param fundsWithdrawn The amount of funds that were withdrawn. @param totalWithdrawn The total amount of funds that were withdrawn. */ event FundsWithdrawn(address indexed by, uint256 fundsWithdrawn, uint256 totalWithdrawn); } ////// contracts/token/interfaces/IBasicFDT.sol /* pragma solidity 0.6.11; */ /* import "lib/openzeppelin-contracts/contracts/token/ERC20/IERC20.sol"; */ /* import "./IBaseFDT.sol"; */ interface IBasicFDT is IBaseFDT, IERC20 { event PointsPerShareUpdated(uint256); event PointsCorrectionUpdated(address indexed, int256); function withdrawnFundsOf(address) external view returns (uint256); function accumulativeFundsOf(address) external view returns (uint256); function updateFundsReceived() external; } ////// contracts/token/interfaces/IExtendedFDT.sol /* pragma solidity 0.6.11; */ /* import "./IBasicFDT.sol"; */ interface IExtendedFDT is IBasicFDT { event LossesPerShareUpdated(uint256); event LossesCorrectionUpdated(address indexed, int256); event LossesDistributed(address indexed, uint256); event LossesRecognized(address indexed, uint256, uint256); function lossesPerShare() external view returns (uint256); function recognizableLossesOf(address) external view returns (uint256); function recognizedLossesOf(address) external view returns (uint256); function accumulativeLossesOf(address) external view returns (uint256); function updateLossesReceived() external; } ////// contracts/token/interfaces/IPoolFDT.sol /* pragma solidity 0.6.11; */ /* import "./IExtendedFDT.sol"; */ interface IPoolFDT is IExtendedFDT { function interestSum() external view returns (uint256); function poolLosses() external view returns (uint256); function interestBalance() external view returns (uint256); function lossesBalance() external view returns (uint256); } ////// contracts/interfaces/IPool.sol /* pragma solidity 0.6.11; */ /* import "../token/interfaces/IPoolFDT.sol"; */ interface IPool is IPoolFDT { function poolDelegate() external view returns (address); function poolAdmins(address) external view returns (bool); function deposit(uint256) external; function increaseCustodyAllowance(address, uint256) external; function transferByCustodian(address, address, uint256) external; function poolState() external view returns (uint256); function deactivate() external; function finalize() external; function claim(address, address) external returns (uint256[7] memory); function setLockupPeriod(uint256) external; function setStakingFee(uint256) external; function setPoolAdmin(address, bool) external; function fundLoan(address, address, uint256) external; function withdraw(uint256) external; function superFactory() external view returns (address); function triggerDefault(address, address) external; function isPoolFinalized() external view returns (bool); function setOpenToPublic(bool) external; function setAllowList(address, bool) external; function allowedLiquidityProviders(address) external view returns (bool); function openToPublic() external view returns (bool); function intendToWithdraw() external; function DL_FACTORY() external view returns (uint8); function liquidityAsset() external view returns (address); function liquidityLocker() external view returns (address); function stakeAsset() external view returns (address); function stakeLocker() external view returns (address); function stakingFee() external view returns (uint256); function delegateFee() external view returns (uint256); function principalOut() external view returns (uint256); function liquidityCap() external view returns (uint256); function lockupPeriod() external view returns (uint256); function depositDate(address) external view returns (uint256); function debtLockers(address, address) external view returns (address); function withdrawCooldown(address) external view returns (uint256); function setLiquidityCap(uint256) external; function cancelWithdraw() external; function reclaimERC20(address) external; function BPTVal(address, address, address, address) external view returns (uint256); function isDepositAllowed(uint256) external view returns (bool); function getInitialStakeRequirements() external view returns (uint256, uint256, bool, uint256, uint256); } ////// contracts/interfaces/IPoolFactory.sol /* pragma solidity 0.6.11; */ interface IPoolFactory { function LL_FACTORY() external view returns (uint8); function SL_FACTORY() external view returns (uint8); function poolsCreated() external view returns (uint256); function globals() external view returns (address); function pools(uint256) external view returns (address); function isPool(address) external view returns (bool); function poolFactoryAdmins(address) external view returns (bool); function setGlobals(address) external; function createPool(address, address, address, address, uint256, uint256, uint256) external returns (address); function setPoolFactoryAdmin(address, bool) external; function pause() external; function unpause() external; } ////// contracts/interfaces/IPremiumCalc.sol /* pragma solidity 0.6.11; */ interface IPremiumCalc { function calcType() external view returns (uint8); function name() external view returns (bytes32); function premiumFee() external view returns (uint256); function getPremiumPayment(address) external view returns (uint256, uint256, uint256); } ////// contracts/interfaces/IRepaymentCalc.sol /* pragma solidity 0.6.11; */ interface IRepaymentCalc { function calcType() external view returns (uint8); function name() external view returns (bytes32); function getNextPayment(address) external view returns (uint256, uint256, uint256); } ////// contracts/interfaces/IUniswapRouter.sol /* pragma solidity 0.6.11; */ interface IUniswapRouter { function swapExactTokensForTokens( uint256 amountIn, uint256 amountOutMin, address[] calldata path, address to, uint256 deadline ) external returns (uint256[] memory amounts); function swapETHForExactTokens( uint256 amountOut, address[] calldata path, address to, uint256 deadline ) external payable returns (uint256[] memory amounts); function quote( uint256 amountA, uint256 reserveA, uint256 reserveB ) external pure returns (uint256 amountB); function WETH() external pure returns (address); } ////// lib/openzeppelin-contracts/contracts/math/SafeMath.sol /* pragma solidity >=0.6.0 <0.8.0; */ /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when an * operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } ////// contracts/library/Util.sol /* pragma solidity 0.6.11; */ /* import "../interfaces/IERC20Details.sol"; */ /* import "../interfaces/IMapleGlobals.sol"; */ /* import "lib/openzeppelin-contracts/contracts/math/SafeMath.sol"; */ /// @title Util is a library that contains utility functions. library Util { using SafeMath for uint256; /** @dev Calculates the minimum amount from a swap (adjustable for price slippage). @param globals Instance of a MapleGlobals. @param fromAsset Address of ERC-20 that will be swapped. @param toAsset Address of ERC-20 that will returned from swap. @param swapAmt Amount of `fromAsset` to be swapped. @return Expected amount of `toAsset` to receive from swap based on current oracle prices. */ function calcMinAmount(IMapleGlobals globals, address fromAsset, address toAsset, uint256 swapAmt) external view returns (uint256) { return swapAmt .mul(globals.getLatestPrice(fromAsset)) // Convert from `fromAsset` value. .mul(10 ** IERC20Details(toAsset).decimals()) // Convert to `toAsset` decimal precision. .div(globals.getLatestPrice(toAsset)) // Convert to `toAsset` value. .div(10 ** IERC20Details(fromAsset).decimals()); // Convert from `fromAsset` decimal precision. } } ////// lib/openzeppelin-contracts/contracts/utils/Address.sol /* pragma solidity >=0.6.2 <0.8.0; */ /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: value }(data); return _verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.staticcall(data); return _verifyCallResult(success, returndata, errorMessage); } function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } ////// lib/openzeppelin-contracts/contracts/token/ERC20/SafeERC20.sol /* pragma solidity >=0.6.0 <0.8.0; */ /* import "./IERC20.sol"; */ /* import "../../math/SafeMath.sol"; */ /* import "../../utils/Address.sol"; */ /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove(IERC20 token, address spender, uint256 value) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' // solhint-disable-next-line max-line-length require((value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } } ////// contracts/library/LoanLib.sol /* pragma solidity 0.6.11; */ /* import "../interfaces/ICollateralLocker.sol"; */ /* import "../interfaces/ICollateralLockerFactory.sol"; */ /* import "../interfaces/IERC20Details.sol"; */ /* import "../interfaces/IFundingLocker.sol"; */ /* import "../interfaces/IFundingLockerFactory.sol"; */ /* import "../interfaces/IMapleGlobals.sol"; */ /* import "../interfaces/ILateFeeCalc.sol"; */ /* import "../interfaces/ILoanFactory.sol"; */ /* import "../interfaces/IPremiumCalc.sol"; */ /* import "../interfaces/IRepaymentCalc.sol"; */ /* import "../interfaces/IUniswapRouter.sol"; */ /* import "../library/Util.sol"; */ /* import "lib/openzeppelin-contracts/contracts/token/ERC20/SafeERC20.sol"; */ /* import "lib/openzeppelin-contracts/contracts/math/SafeMath.sol"; */ /// @title LoanLib is a library of utility functions used by Loan. library LoanLib { using SafeMath for uint256; using SafeERC20 for IERC20; address public constant UNISWAP_ROUTER = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D; /********************************/ /*** Lender Utility Functions ***/ /********************************/ /** @dev Performs sanity checks on the data passed in Loan constructor. @param globals Instance of a MapleGlobals. @param liquidityAsset Contract address of the Liquidity Asset. @param collateralAsset Contract address of the Collateral Asset. @param specs Contains specifications for this Loan. */ function loanSanityChecks(IMapleGlobals globals, address liquidityAsset, address collateralAsset, uint256[5] calldata specs) external view { require(globals.isValidLiquidityAsset(liquidityAsset), "L:INVALID_LIQ_ASSET"); require(globals.isValidCollateralAsset(collateralAsset), "L:INVALID_COL_ASSET"); require(specs[2] != uint256(0), "L:ZERO_PID"); require(specs[1].mod(specs[2]) == uint256(0), "L:INVALID_TERM_DAYS"); require(specs[3] > uint256(0), "L:ZERO_REQUEST_AMT"); } /** @dev Returns capital to Lenders, if the Borrower has not drawn down the Loan past the grace period. @param liquidityAsset IERC20 of the Liquidity Asset. @param fundingLocker Address of FundingLocker. @param createdAt Timestamp of Loan instantiation. @param fundingPeriod Duration of the funding period, after which funds can be reclaimed. @return excessReturned Amount of Liquidity Asset that was returned to the Loan from the FundingLocker. */ function unwind(IERC20 liquidityAsset, address fundingLocker, uint256 createdAt, uint256 fundingPeriod) external returns (uint256 excessReturned) { // Only callable if Loan funding period has elapsed. require(block.timestamp > createdAt.add(fundingPeriod), "L:STILL_FUNDING_PERIOD"); // Account for existing balance in Loan. uint256 preBal = liquidityAsset.balanceOf(address(this)); // Drain funding from FundingLocker, transfers all the Liquidity Asset to this Loan. IFundingLocker(fundingLocker).drain(); return liquidityAsset.balanceOf(address(this)).sub(preBal); } /** @dev Liquidates a Borrower's collateral, via Uniswap, when a default is triggered. Only the Loan can call this function. @param collateralAsset IERC20 of the Collateral Asset. @param liquidityAsset Address of Liquidity Asset. @param superFactory Factory that instantiated Loan. @param collateralLocker Address of CollateralLocker. @return amountLiquidated Amount of Collateral Asset that was liquidated. @return amountRecovered Amount of Liquidity Asset that was returned to the Loan from the liquidation. */ function liquidateCollateral( IERC20 collateralAsset, address liquidityAsset, address superFactory, address collateralLocker ) external returns ( uint256 amountLiquidated, uint256 amountRecovered ) { // Get the liquidation amount from CollateralLocker. uint256 liquidationAmt = collateralAsset.balanceOf(address(collateralLocker)); // Pull the Collateral Asset from CollateralLocker. ICollateralLocker(collateralLocker).pull(address(this), liquidationAmt); if (address(collateralAsset) == liquidityAsset || liquidationAmt == uint256(0)) return (liquidationAmt, liquidationAmt); collateralAsset.safeApprove(UNISWAP_ROUTER, uint256(0)); collateralAsset.safeApprove(UNISWAP_ROUTER, liquidationAmt); IMapleGlobals globals = _globals(superFactory); // Get minimum amount of loan asset get after swapping collateral asset. uint256 minAmount = Util.calcMinAmount(globals, address(collateralAsset), liquidityAsset, liquidationAmt); // Generate Uniswap path. address uniswapAssetForPath = globals.defaultUniswapPath(address(collateralAsset), liquidityAsset); bool middleAsset = uniswapAssetForPath != liquidityAsset && uniswapAssetForPath != address(0); address[] memory path = new address[](middleAsset ? 3 : 2); path[0] = address(collateralAsset); path[1] = middleAsset ? uniswapAssetForPath : liquidityAsset; if (middleAsset) path[2] = liquidityAsset; // Swap collateralAsset for Liquidity Asset. uint256[] memory returnAmounts = IUniswapRouter(UNISWAP_ROUTER).swapExactTokensForTokens( liquidationAmt, minAmount.sub(minAmount.mul(globals.maxSwapSlippage()).div(10_000)), path, address(this), block.timestamp ); return(returnAmounts[0], returnAmounts[path.length - 1]); } /**********************************/ /*** Governor Utility Functions ***/ /**********************************/ /** @dev Transfers any locked funds to the Governor. Only the Governor can call this function. @param token Address of the token to be reclaimed. @param liquidityAsset Address of token that is used by the loan for drawdown and payments. @param globals Instance of a MapleGlobals. */ function reclaimERC20(address token, address liquidityAsset, IMapleGlobals globals) external { require(msg.sender == globals.governor(), "L:NOT_GOV"); require(token != liquidityAsset && token != address(0), "L:INVALID_TOKEN"); IERC20(token).safeTransfer(msg.sender, IERC20(token).balanceOf(address(this))); } /************************/ /*** Getter Functions ***/ /************************/ /** @dev Returns if a default can be triggered. @param nextPaymentDue Timestamp of when payment is due. @param defaultGracePeriod Amount of time after the next payment is due that a Borrower has before a liquidation can occur. @param superFactory Factory that instantiated Loan. @param balance LoanFDT balance of account trying to trigger a default. @param totalSupply Total supply of LoanFDT. @return Boolean indicating if default can be triggered. */ function canTriggerDefault(uint256 nextPaymentDue, uint256 defaultGracePeriod, address superFactory, uint256 balance, uint256 totalSupply) external view returns (bool) { bool pastDefaultGracePeriod = block.timestamp > nextPaymentDue.add(defaultGracePeriod); // Check if the Loan is past the default grace period and that the account triggering the default has a percentage of total LoanFDTs // that is greater than the minimum equity needed (specified in globals) return pastDefaultGracePeriod && balance >= ((totalSupply * _globals(superFactory).minLoanEquity()) / 10_000); } /** @dev Returns information on next payment amount. @param repaymentCalc Address of RepaymentCalc. @param nextPaymentDue Timestamp of when payment is due. @param lateFeeCalc Address of LateFeeCalc. @return total Entitled total amount needed to be paid in the next payment (Principal + Interest only when the next payment is last payment of the Loan). @return principal Entitled principal amount needed to be paid in the next payment. @return interest Entitled interest amount needed to be paid in the next payment. @return _nextPaymentDue Payment Due Date. @return paymentLate Whether payment is late. */ function getNextPayment( address repaymentCalc, uint256 nextPaymentDue, address lateFeeCalc ) external view returns ( uint256 total, uint256 principal, uint256 interest, uint256 _nextPaymentDue, bool paymentLate ) { _nextPaymentDue = nextPaymentDue; // Get next payment amounts from RepaymentCalc. (total, principal, interest) = IRepaymentCalc(repaymentCalc).getNextPayment(address(this)); paymentLate = block.timestamp > _nextPaymentDue; // If payment is late, add late fees. if (paymentLate) { uint256 lateFee = ILateFeeCalc(lateFeeCalc).getLateFee(interest); total = total.add(lateFee); interest = interest.add(lateFee); } } /** @dev Returns information on full payment amount. @param repaymentCalc Address of RepaymentCalc. @param nextPaymentDue Timestamp of when payment is due. @param lateFeeCalc Address of LateFeeCalc. @param premiumCalc Address of PremiumCalc. @return total Principal + Interest for the full payment. @return principal Entitled principal amount needed to be paid in the full payment. @return interest Entitled interest amount needed to be paid in the full payment. */ function getFullPayment( address repaymentCalc, uint256 nextPaymentDue, address lateFeeCalc, address premiumCalc ) external view returns ( uint256 total, uint256 principal, uint256 interest ) { (total, principal, interest) = IPremiumCalc(premiumCalc).getPremiumPayment(address(this)); if (block.timestamp <= nextPaymentDue) return (total, principal, interest); // If payment is late, calculate and add late fees using interest amount from regular payment. (,, uint256 regInterest) = IRepaymentCalc(repaymentCalc).getNextPayment(address(this)); uint256 lateFee = ILateFeeCalc(lateFeeCalc).getLateFee(regInterest); total = total.add(lateFee); interest = interest.add(lateFee); } /** @dev Calculates collateral required to drawdown amount. @param collateralAsset IERC20 of the Collateral Asset. @param liquidityAsset IERC20 of the Liquidity Asset. @param collateralRatio Percentage of drawdown value that must be posted as collateral. @param superFactory Factory that instantiated Loan. @param amt Drawdown amount. @return Amount of Collateral Asset required to post in CollateralLocker for given drawdown amount. */ function collateralRequiredForDrawdown( IERC20Details collateralAsset, IERC20Details liquidityAsset, uint256 collateralRatio, address superFactory, uint256 amt ) external view returns (uint256) { IMapleGlobals globals = _globals(superFactory); uint256 wad = _toWad(amt, liquidityAsset); // Convert to WAD precision. // Fetch current value of Liquidity Asset and Collateral Asset (Chainlink oracles provide 8 decimal precision). uint256 liquidityAssetPrice = globals.getLatestPrice(address(liquidityAsset)); uint256 collateralPrice = globals.getLatestPrice(address(collateralAsset)); // Calculate collateral required. uint256 collateralRequiredUSD = wad.mul(liquidityAssetPrice).mul(collateralRatio).div(10_000); // 18 + 8 = 26 decimals uint256 collateralRequiredWAD = collateralRequiredUSD.div(collateralPrice); // 26 - 8 = 18 decimals return collateralRequiredWAD.mul(10 ** collateralAsset.decimals()).div(10 ** 18); // 18 + collateralAssetDecimals - 18 = collateralAssetDecimals } /************************/ /*** Helper Functions ***/ /************************/ function _globals(address loanFactory) internal view returns (IMapleGlobals) { return IMapleGlobals(ILoanFactory(loanFactory).globals()); } function _toWad(uint256 amt, IERC20Details liquidityAsset) internal view returns (uint256) { return amt.mul(10 ** 18).div(10 ** liquidityAsset.decimals()); } } ////// contracts/math/SafeMathInt.sol /* pragma solidity 0.6.11; */ library SafeMathInt { function toUint256Safe(int256 a) internal pure returns (uint256) { require(a >= 0, "SMI:NEG"); return uint256(a); } } ////// contracts/math/SafeMathUint.sol /* pragma solidity 0.6.11; */ library SafeMathUint { function toInt256Safe(uint256 a) internal pure returns (int256 b) { b = int256(a); require(b >= 0, "SMU:OOB"); } } ////// lib/openzeppelin-contracts/contracts/math/SignedSafeMath.sol /* pragma solidity >=0.6.0 <0.8.0; */ /** * @title SignedSafeMath * @dev Signed math operations with safety checks that revert on error. */ library SignedSafeMath { int256 constant private _INT256_MIN = -2**255; /** * @dev Returns the multiplication of two signed integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(int256 a, int256 b) internal pure returns (int256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } require(!(a == -1 && b == _INT256_MIN), "SignedSafeMath: multiplication overflow"); int256 c = a * b; require(c / a == b, "SignedSafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two signed integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(int256 a, int256 b) internal pure returns (int256) { require(b != 0, "SignedSafeMath: division by zero"); require(!(b == -1 && a == _INT256_MIN), "SignedSafeMath: division overflow"); int256 c = a / b; return c; } /** * @dev Returns the subtraction of two signed integers, reverting on * overflow. * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(int256 a, int256 b) internal pure returns (int256) { int256 c = a - b; require((b >= 0 && c <= a) || (b < 0 && c > a), "SignedSafeMath: subtraction overflow"); return c; } /** * @dev Returns the addition of two signed integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(int256 a, int256 b) internal pure returns (int256) { int256 c = a + b; require((b >= 0 && c >= a) || (b < 0 && c < a), "SignedSafeMath: addition overflow"); return c; } } ////// lib/openzeppelin-contracts/contracts/GSN/Context.sol /* pragma solidity >=0.6.0 <0.8.0; */ /* * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with GSN meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } ////// lib/openzeppelin-contracts/contracts/token/ERC20/ERC20.sol /* pragma solidity >=0.6.0 <0.8.0; */ /* import "../../GSN/Context.sol"; */ /* import "./IERC20.sol"; */ /* import "../../math/SafeMath.sol"; */ /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin guidelines: functions revert instead * of returning `false` on failure. This behavior is nonetheless conventional * and does not conflict with the expectations of ERC20 applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20 is Context, IERC20 { using SafeMath for uint256; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; uint8 private _decimals; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ constructor (string memory name_, string memory symbol_) public { _name = name_; _symbol = symbol_; _decimals = 18; } /** * @dev Returns the name of the token. */ function name() public view returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is * called. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * Requirements: * * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Sets {decimals} to a value other than the default one of 18. * * WARNING: This function should only be called from the constructor. Most * applications that interact with token contracts will not expect * {decimals} to ever change, and may work incorrectly if it does. */ function _setupDecimals(uint8 decimals_) internal { _decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } } ////// contracts/token/BasicFDT.sol /* pragma solidity 0.6.11; */ /* import "lib/openzeppelin-contracts/contracts/token/ERC20/ERC20.sol"; */ /* import "lib/openzeppelin-contracts/contracts/math/SafeMath.sol"; */ /* import "lib/openzeppelin-contracts/contracts/math/SignedSafeMath.sol"; */ /* import "./interfaces/IBaseFDT.sol"; */ /* import "../math/SafeMathUint.sol"; */ /* import "../math/SafeMathInt.sol"; */ /// @title BasicFDT implements base level FDT functionality for accounting for revenues. abstract contract BasicFDT is IBaseFDT, ERC20 { using SafeMath for uint256; using SafeMathUint for uint256; using SignedSafeMath for int256; using SafeMathInt for int256; uint256 internal constant pointsMultiplier = 2 ** 128; uint256 internal pointsPerShare; mapping(address => int256) internal pointsCorrection; mapping(address => uint256) internal withdrawnFunds; event PointsPerShareUpdated(uint256 pointsPerShare); event PointsCorrectionUpdated(address indexed account, int256 pointsCorrection); constructor(string memory name, string memory symbol) ERC20(name, symbol) public { } /** @dev Distributes funds to token holders. @dev It reverts if the total supply of tokens is 0. @dev It emits a `FundsDistributed` event if the amount of received funds is greater than 0. @dev It emits a `PointsPerShareUpdated` event if the amount of received funds is greater than 0. About undistributed funds: In each distribution, there is a small amount of funds which do not get distributed, which is `(value pointsMultiplier) % totalSupply()`. With a well-chosen `pointsMultiplier`, the amount funds that are not getting distributed in a distribution can be less than 1 (base unit). We can actually keep track of the undistributed funds in a distribution and try to distribute it in the next distribution. */ function _distributeFunds(uint256 value) internal { require(totalSupply() > 0, "FDT:ZERO_SUPPLY"); if (value == 0) return; pointsPerShare = pointsPerShare.add(value.mul(pointsMultiplier) / totalSupply()); emit FundsDistributed(msg.sender, value); emit PointsPerShareUpdated(pointsPerShare); } /** @dev Prepares the withdrawal of funds. @dev It emits a `FundsWithdrawn` event if the amount of withdrawn funds is greater than 0. @return withdrawableDividend The amount of dividend funds that can be withdrawn. */ function _prepareWithdraw() internal returns (uint256 withdrawableDividend) { withdrawableDividend = withdrawableFundsOf(msg.sender); uint256 _withdrawnFunds = withdrawnFunds[msg.sender].add(withdrawableDividend); withdrawnFunds[msg.sender] = _withdrawnFunds; emit FundsWithdrawn(msg.sender, withdrawableDividend, _withdrawnFunds); } /** @dev Returns the amount of funds that an account can withdraw. @param _owner The address of a token holder. @return The amount funds that `_owner` can withdraw. */ function withdrawableFundsOf(address _owner) public view override returns (uint256) { return accumulativeFundsOf(_owner).sub(withdrawnFunds[_owner]); } /** @dev Returns the amount of funds that an account has withdrawn. @param _owner The address of a token holder. @return The amount of funds that `_owner` has withdrawn. */ function withdrawnFundsOf(address _owner) external view returns (uint256) { return withdrawnFunds[_owner]; } /** @dev Returns the amount of funds that an account has earned in total. @dev accumulativeFundsOf(_owner) = withdrawableFundsOf(_owner) + withdrawnFundsOf(_owner) = (pointsPerShare * balanceOf(_owner) + pointsCorrection[_owner]) / pointsMultiplier @param _owner The address of a token holder. @return The amount of funds that `_owner` has earned in total. */ function accumulativeFundsOf(address _owner) public view returns (uint256) { return pointsPerShare .mul(balanceOf(_owner)) .toInt256Safe() .add(pointsCorrection[_owner]) .toUint256Safe() / pointsMultiplier; } /** @dev Transfers tokens from one account to another. Updates pointsCorrection to keep funds unchanged. @dev It emits two `PointsCorrectionUpdated` events, one for the sender and one for the receiver. @param from The address to transfer from. @param to The address to transfer to. @param value The amount to be transferred. */ function _transfer( address from, address to, uint256 value ) internal virtual override { super._transfer(from, to, value); int256 _magCorrection = pointsPerShare.mul(value).toInt256Safe(); int256 pointsCorrectionFrom = pointsCorrection[from].add(_magCorrection); pointsCorrection[from] = pointsCorrectionFrom; int256 pointsCorrectionTo = pointsCorrection[to].sub(_magCorrection); pointsCorrection[to] = pointsCorrectionTo; emit PointsCorrectionUpdated(from, pointsCorrectionFrom); emit PointsCorrectionUpdated(to, pointsCorrectionTo); } /** @dev Mints tokens to an account. Updates pointsCorrection to keep funds unchanged. @param account The account that will receive the created tokens. @param value The amount that will be created. */ function _mint(address account, uint256 value) internal virtual override { super._mint(account, value); int256 _pointsCorrection = pointsCorrection[account].sub( (pointsPerShare.mul(value)).toInt256Safe() ); pointsCorrection[account] = _pointsCorrection; emit PointsCorrectionUpdated(account, _pointsCorrection); } /** @dev Burns an amount of the token of a given account. Updates pointsCorrection to keep funds unchanged. @dev It emits a `PointsCorrectionUpdated` event. @param account The account whose tokens will be burnt. @param value The amount that will be burnt. */ function _burn(address account, uint256 value) internal virtual override { super._burn(account, value); int256 _pointsCorrection = pointsCorrection[account].add( (pointsPerShare.mul(value)).toInt256Safe() ); pointsCorrection[account] = _pointsCorrection; emit PointsCorrectionUpdated(account, _pointsCorrection); } /** @dev Withdraws all available funds for a token holder. */ function withdrawFunds() public virtual override {} /** @dev Updates the current `fundsToken` balance and returns the difference of the new and previous `fundsToken` balance. @return A int256 representing the difference of the new and previous `fundsToken` balance. */ function _updateFundsTokenBalance() internal virtual returns (int256) {} /** @dev Registers a payment of funds in tokens. May be called directly after a deposit is made. @dev Calls _updateFundsTokenBalance(), whereby the contract computes the delta of the new and previous `fundsToken` balance and increments the total received funds (cumulative), by delta, by calling _distributeFunds(). */ function updateFundsReceived() public virtual { int256 newFunds = _updateFundsTokenBalance(); if (newFunds <= 0) return; _distributeFunds(newFunds.toUint256Safe()); } } ////// contracts/token/LoanFDT.sol /* pragma solidity 0.6.11; */ /* import "lib/openzeppelin-contracts/contracts/token/ERC20/SafeERC20.sol"; */ /* import "./BasicFDT.sol"; */ /// @title LoanFDT inherits BasicFDT and uses the original ERC-2222 logic. abstract contract LoanFDT is BasicFDT { using SafeMath for uint256; using SafeMathUint for uint256; using SignedSafeMath for int256; using SafeMathInt for int256; using SafeERC20 for IERC20; IERC20 public immutable fundsToken; // The `fundsToken` (dividends). uint256 public fundsTokenBalance; // The amount of `fundsToken` (Liquidity Asset) currently present and accounted for in this contract. constructor(string memory name, string memory symbol, address _fundsToken) BasicFDT(name, symbol) public { fundsToken = IERC20(_fundsToken); } /** @dev Withdraws all available funds for a token holder. */ function withdrawFunds() public virtual override { uint256 withdrawableFunds = _prepareWithdraw(); if (withdrawableFunds > uint256(0)) { fundsToken.safeTransfer(msg.sender, withdrawableFunds); _updateFundsTokenBalance(); } } /** @dev Updates the current `fundsToken` balance and returns the difference of the new and previous `fundsToken` balance. @return A int256 representing the difference of the new and previous `fundsToken` balance. */ function _updateFundsTokenBalance() internal virtual override returns (int256) { uint256 _prevFundsTokenBalance = fundsTokenBalance; fundsTokenBalance = fundsToken.balanceOf(address(this)); return int256(fundsTokenBalance).sub(int256(_prevFundsTokenBalance)); } } ////// lib/openzeppelin-contracts/contracts/utils/Pausable.sol /* pragma solidity >=0.6.0 <0.8.0; */ /* import "../GSN/Context.sol"; */ /** * @dev Contract module which allows children to implement an emergency stop * mechanism that can be triggered by an authorized account. * * This module is used through inheritance. It will make available the * modifiers `whenNotPaused` and `whenPaused`, which can be applied to * the functions of your contract. Note that they will not be pausable by * simply including this module, only once the modifiers are put in place. */ abstract contract Pausable is Context { /** * @dev Emitted when the pause is triggered by `account`. */ event Paused(address account); /** * @dev Emitted when the pause is lifted by `account`. */ event Unpaused(address account); bool private _paused; /** * @dev Initializes the contract in unpaused state. */ constructor () internal { _paused = false; } /** * @dev Returns true if the contract is paused, and false otherwise. */ function paused() public view returns (bool) { return _paused; } /** * @dev Modifier to make a function callable only when the contract is not paused. * * Requirements: * * - The contract must not be paused. */ modifier whenNotPaused() { require(!_paused, "Pausable: paused"); _; } /** * @dev Modifier to make a function callable only when the contract is paused. * * Requirements: * * - The contract must be paused. */ modifier whenPaused() { require(_paused, "Pausable: not paused"); _; } /** * @dev Triggers stopped state. * * Requirements: * * - The contract must not be paused. */ function _pause() internal virtual whenNotPaused { _paused = true; emit Paused(_msgSender()); } /** * @dev Returns to normal state. * * Requirements: * * - The contract must be paused. */ function _unpause() internal virtual whenPaused { _paused = false; emit Unpaused(_msgSender()); } } ////// contracts/Loan.sol /* pragma solidity 0.6.11; */ /* import "lib/openzeppelin-contracts/contracts/utils/Pausable.sol"; */ /* import "lib/openzeppelin-contracts/contracts/token/ERC20/SafeERC20.sol"; */ /* import "./interfaces/ICollateralLocker.sol"; */ /* import "./interfaces/ICollateralLockerFactory.sol"; */ /* import "./interfaces/IERC20Details.sol"; */ /* import "./interfaces/IFundingLocker.sol"; */ /* import "./interfaces/IFundingLockerFactory.sol"; */ /* import "./interfaces/IMapleGlobals.sol"; */ /* import "./interfaces/ILateFeeCalc.sol"; */ /* import "./interfaces/ILiquidityLocker.sol"; */ /* import "./interfaces/ILoanFactory.sol"; */ /* import "./interfaces/IPool.sol"; */ /* import "./interfaces/IPoolFactory.sol"; */ /* import "./interfaces/IPremiumCalc.sol"; */ /* import "./interfaces/IRepaymentCalc.sol"; */ /* import "./interfaces/IUniswapRouter.sol"; */ /* import "./library/Util.sol"; */ /* import "./library/LoanLib.sol"; */ /* import "./token/LoanFDT.sol"; */ /// @title Loan maintains all accounting and functionality related to Loans. contract Loan is LoanFDT, Pausable { using SafeMathInt for int256; using SignedSafeMath for int256; using SafeMath for uint256; using SafeERC20 for IERC20; /** Ready = The Loan has been initialized and is ready for funding (assuming funding period hasn't ended) Active = The Loan has been drawdown and the Borrower is making payments Matured = The Loan is fully paid off and has "matured" Expired = The Loan did not initiate, and all funding was returned to Lenders Liquidated = The Loan has been liquidated */ enum State { Ready, Active, Matured, Expired, Liquidated } State public loanState; // The current state of this Loan, as defined in the State enum below. IERC20 public immutable liquidityAsset; // The asset deposited by Lenders into the FundingLocker, when funding this Loan. IERC20 public immutable collateralAsset; // The asset deposited by Borrower into the CollateralLocker, for collateralizing this Loan. address public immutable fundingLocker; // The FundingLocker that holds custody of Loan funds before drawdown. address public immutable flFactory; // The FundingLockerFactory. address public immutable collateralLocker; // The CollateralLocker that holds custody of Loan collateral. address public immutable clFactory; // The CollateralLockerFactory. address public immutable borrower; // The Borrower of this Loan, responsible for repayments. address public immutable repaymentCalc; // The RepaymentCalc for this Loan. address public immutable lateFeeCalc; // The LateFeeCalc for this Loan. address public immutable premiumCalc; // The PremiumCalc for this Loan. address public immutable superFactory; // The LoanFactory that deployed this Loan. mapping(address => bool) public loanAdmins; // Admin addresses that have permission to do certain operations in case of disaster management. uint256 public nextPaymentDue; // The unix timestamp due date of the next payment. // Loan specifications uint256 public immutable apr; // The APR in basis points. uint256 public paymentsRemaining; // The number of payments remaining on the Loan. uint256 public immutable termDays; // The total length of the Loan term in days. uint256 public immutable paymentIntervalSeconds; // The time between Loan payments in seconds. uint256 public immutable requestAmount; // The total requested amount for Loan. uint256 public immutable collateralRatio; // The percentage of value of the drawdown amount to post as collateral in basis points. uint256 public immutable createdAt; // The timestamp of when Loan was instantiated. uint256 public immutable fundingPeriod; // The time for a Loan to be funded in seconds. uint256 public immutable defaultGracePeriod; // The time a Borrower has, after a payment is due, to make a payment before a liquidation can occur. // Accounting variables uint256 public principalOwed; // The amount of principal owed (initially the drawdown amount). uint256 public principalPaid; // The amount of principal that has been paid by the Borrower since the Loan instantiation. uint256 public interestPaid; // The amount of interest that has been paid by the Borrower since the Loan instantiation. uint256 public feePaid; // The amount of fees that have been paid by the Borrower since the Loan instantiation. uint256 public excessReturned; // The amount of excess that has been returned to the Lenders after the Loan drawdown. // Liquidation variables uint256 public amountLiquidated; // The amount of Collateral Asset that has been liquidated after default. uint256 public amountRecovered; // The amount of Liquidity Asset that has been recovered after default. uint256 public defaultSuffered; // The difference between `amountRecovered` and `principalOwed` after liquidation. uint256 public liquidationExcess; // If `amountRecovered > principalOwed`, this is the amount of Liquidity Asset that is to be returned to the Borrower. event LoanFunded(address indexed fundedBy, uint256 amountFunded); event BalanceUpdated(address indexed account, address indexed token, uint256 balance); event Drawdown(uint256 drawdownAmount); event LoanStateChanged(State state); event LoanAdminSet(address indexed loanAdmin, bool allowed); event PaymentMade( uint256 totalPaid, uint256 principalPaid, uint256 interestPaid, uint256 paymentsRemaining, uint256 principalOwed, uint256 nextPaymentDue, bool latePayment ); event Liquidation( uint256 collateralSwapped, uint256 liquidityAssetReturned, uint256 liquidationExcess, uint256 defaultSuffered ); /** @dev Constructor for a Loan. @dev It emits a `LoanStateChanged` event. @param _borrower Will receive the funding when calling `drawdown()`. Is also responsible for repayments. @param _liquidityAsset The asset the Borrower is requesting funding in. @param _collateralAsset The asset provided as collateral by the Borrower. @param _flFactory Factory to instantiate FundingLocker with. @param _clFactory Factory to instantiate CollateralLocker with. @param specs Contains specifications for this Loan. specs[0] = apr specs[1] = termDays specs[2] = paymentIntervalDays (aka PID) specs[3] = requestAmount specs[4] = collateralRatio @param calcs The calculators used for this Loan. calcs[0] = repaymentCalc calcs[1] = lateFeeCalc calcs[2] = premiumCalc */ constructor( address _borrower, address _liquidityAsset, address _collateralAsset, address _flFactory, address _clFactory, uint256[5] memory specs, address[3] memory calcs ) LoanFDT("Maple Loan Token", "MPL-LOAN", _liquidityAsset) public { IMapleGlobals globals = _globals(msg.sender); // Perform validity cross-checks. LoanLib.loanSanityChecks(globals, _liquidityAsset, _collateralAsset, specs); borrower = _borrower; liquidityAsset = IERC20(_liquidityAsset); collateralAsset = IERC20(_collateralAsset); flFactory = _flFactory; clFactory = _clFactory; createdAt = block.timestamp; // Update state variables. apr = specs[0]; termDays = specs[1]; paymentsRemaining = specs[1].div(specs[2]); paymentIntervalSeconds = specs[2].mul(1 days); requestAmount = specs[3]; collateralRatio = specs[4]; fundingPeriod = globals.fundingPeriod(); defaultGracePeriod = globals.defaultGracePeriod(); repaymentCalc = calcs[0]; lateFeeCalc = calcs[1]; premiumCalc = calcs[2]; superFactory = msg.sender; // Deploy lockers. collateralLocker = ICollateralLockerFactory(_clFactory).newLocker(_collateralAsset); fundingLocker = IFundingLockerFactory(_flFactory).newLocker(_liquidityAsset); emit LoanStateChanged(State.Ready); } /**************************/ /*** Borrower Functions ***/ /**************************/ /** @dev Draws down funding from FundingLocker, posts collateral, and transitions the Loan state from `Ready` to `Active`. Only the Borrower can call this function. @dev It emits four `BalanceUpdated` events. @dev It emits a `LoanStateChanged` event. @dev It emits a `Drawdown` event. @param amt Amount of Liquidity Asset the Borrower draws down. Remainder is returned to the Loan where it can be claimed back by LoanFDT holders. */ function drawdown(uint256 amt) external { _whenProtocolNotPaused(); _isValidBorrower(); _isValidState(State.Ready); IMapleGlobals globals = _globals(superFactory); IFundingLocker _fundingLocker = IFundingLocker(fundingLocker); require(amt >= requestAmount, "L:AMT_LT_REQUEST_AMT"); require(amt <= _getFundingLockerBalance(), "L:AMT_GT_FUNDED_AMT"); // Update accounting variables for the Loan. principalOwed = amt; nextPaymentDue = block.timestamp.add(paymentIntervalSeconds); loanState = State.Active; // Transfer the required amount of collateral for drawdown from the Borrower to the CollateralLocker. collateralAsset.safeTransferFrom(borrower, collateralLocker, collateralRequiredForDrawdown(amt)); // Transfer funding amount from the FundingLocker to the Borrower, then drain remaining funds to the Loan. uint256 treasuryFee = globals.treasuryFee(); uint256 investorFee = globals.investorFee(); address treasury = globals.mapleTreasury(); uint256 _feePaid = feePaid = amt.mul(investorFee).div(10_000); // Update fees paid for `claim()`. uint256 treasuryAmt = amt.mul(treasuryFee).div(10_000); // Calculate amount to send to the MapleTreasury. _transferFunds(_fundingLocker, treasury, treasuryAmt); // Send the treasury fee directly to the MapleTreasury. _transferFunds(_fundingLocker, borrower, amt.sub(treasuryAmt).sub(_feePaid)); // Transfer drawdown amount to the Borrower. // Update excessReturned for `claim()`. excessReturned = _getFundingLockerBalance().sub(_feePaid); // Drain remaining funds from the FundingLocker (amount equal to `excessReturned` plus `feePaid`) _fundingLocker.drain(); // Call `updateFundsReceived()` update LoanFDT accounting with funds received from fees and excess returned. updateFundsReceived(); _emitBalanceUpdateEventForCollateralLocker(); _emitBalanceUpdateEventForFundingLocker(); _emitBalanceUpdateEventForLoan(); emit BalanceUpdated(treasury, address(liquidityAsset), liquidityAsset.balanceOf(treasury)); emit LoanStateChanged(State.Active); emit Drawdown(amt); } /** @dev Makes a payment for this Loan. Amounts are calculated for the Borrower. */ function makePayment() external { _whenProtocolNotPaused(); _isValidState(State.Active); (uint256 total, uint256 principal, uint256 interest,, bool paymentLate) = getNextPayment(); --paymentsRemaining; _makePayment(total, principal, interest, paymentLate); } /** @dev Makes the full payment for this Loan (a.k.a. "calling" the Loan). This requires the Borrower to pay a premium fee. */ function makeFullPayment() external { _whenProtocolNotPaused(); _isValidState(State.Active); (uint256 total, uint256 principal, uint256 interest) = getFullPayment(); paymentsRemaining = uint256(0); _makePayment(total, principal, interest, false); } /** @dev Updates the payment variables and transfers funds from the Borrower into the Loan. @dev It emits one or two `BalanceUpdated` events (depending if payments remaining). @dev It emits a `LoanStateChanged` event if no payments remaining. @dev It emits a `PaymentMade` event. */ function _makePayment(uint256 total, uint256 principal, uint256 interest, bool paymentLate) internal { // Caching to reduce `SLOADs`. uint256 _paymentsRemaining = paymentsRemaining; // Update internal accounting variables. interestPaid = interestPaid.add(interest); if (principal > uint256(0)) principalPaid = principalPaid.add(principal); if (_paymentsRemaining > uint256(0)) { // Update info related to next payment and, if needed, decrement principalOwed. nextPaymentDue = nextPaymentDue.add(paymentIntervalSeconds); if (principal > uint256(0)) principalOwed = principalOwed.sub(principal); } else { // Update info to close loan. principalOwed = uint256(0); loanState = State.Matured; nextPaymentDue = uint256(0); // Transfer all collateral back to the Borrower. ICollateralLocker(collateralLocker).pull(borrower, _getCollateralLockerBalance()); _emitBalanceUpdateEventForCollateralLocker(); emit LoanStateChanged(State.Matured); } // Loan payer sends funds to the Loan. liquidityAsset.safeTransferFrom(msg.sender, address(this), total); // Update FDT accounting with funds received from interest payment. updateFundsReceived(); emit PaymentMade( total, principal, interest, _paymentsRemaining, principalOwed, _paymentsRemaining > 0 ? nextPaymentDue : 0, paymentLate ); _emitBalanceUpdateEventForLoan(); } /************************/ /*** Lender Functions ***/ /************************/ /** @dev Funds this Loan and mints LoanFDTs for `mintTo` (DebtLocker in the case of Pool funding). Only LiquidityLocker using valid/approved Pool can call this function. @dev It emits a `LoanFunded` event. @dev It emits a `BalanceUpdated` event. @param amt Amount to fund the Loan. @param mintTo Address that LoanFDTs are minted to. */ function fundLoan(address mintTo, uint256 amt) whenNotPaused external { _whenProtocolNotPaused(); _isValidState(State.Ready); _isValidPool(); _isWithinFundingPeriod(); liquidityAsset.safeTransferFrom(msg.sender, fundingLocker, amt); uint256 wad = _toWad(amt); // Convert to WAD precision. _mint(mintTo, wad); // Mint LoanFDTs to `mintTo` (i.e DebtLocker contract). emit LoanFunded(mintTo, amt); _emitBalanceUpdateEventForFundingLocker(); } /** @dev Handles returning capital to the Loan, where it can be claimed back by LoanFDT holders, if the Borrower has not drawn down on the Loan past the drawdown grace period. @dev It emits a `LoanStateChanged` event. */ function unwind() external { _whenProtocolNotPaused(); _isValidState(State.Ready); // Update accounting for `claim()` and transfer funds from FundingLocker to Loan. excessReturned = LoanLib.unwind(liquidityAsset, fundingLocker, createdAt, fundingPeriod); updateFundsReceived(); // Transition state to `Expired`. loanState = State.Expired; emit LoanStateChanged(State.Expired); } /** @dev Triggers a default if the Loan meets certain default conditions, liquidating all collateral and updating accounting. Only the an account with sufficient LoanFDTs of this Loan can call this function. @dev It emits a `BalanceUpdated` event. @dev It emits a `Liquidation` event. @dev It emits a `LoanStateChanged` event. */ function triggerDefault() external { _whenProtocolNotPaused(); _isValidState(State.Active); require(LoanLib.canTriggerDefault(nextPaymentDue, defaultGracePeriod, superFactory, balanceOf(msg.sender), totalSupply()), "L:FAILED_TO_LIQ"); // Pull the Collateral Asset from the CollateralLocker, swap to the Liquidity Asset, and hold custody of the resulting Liquidity Asset in the Loan. (amountLiquidated, amountRecovered) = LoanLib.liquidateCollateral(collateralAsset, address(liquidityAsset), superFactory, collateralLocker); _emitBalanceUpdateEventForCollateralLocker(); // Decrement `principalOwed` by `amountRecovered`, set `defaultSuffered` to the difference (shortfall from the liquidation). if (amountRecovered <= principalOwed) { principalOwed = principalOwed.sub(amountRecovered); defaultSuffered = principalOwed; } // Set `principalOwed` to zero and return excess value from the liquidation back to the Borrower. else { liquidationExcess = amountRecovered.sub(principalOwed); principalOwed = 0; liquidityAsset.safeTransfer(borrower, liquidationExcess); // Send excess to the Borrower. } // Update LoanFDT accounting with funds received from the liquidation. updateFundsReceived(); // Transition `loanState` to `Liquidated` loanState = State.Liquidated; emit Liquidation( amountLiquidated, // Amount of Collateral Asset swapped. amountRecovered, // Amount of Liquidity Asset recovered from swap. liquidationExcess, // Amount of Liquidity Asset returned to borrower. defaultSuffered // Remaining losses after the liquidation. ); emit LoanStateChanged(State.Liquidated); } /***********************/ /*** Admin Functions ***/ /***********************/ /** @dev Triggers paused state. Halts functionality for certain functions. Only the Borrower or a Loan Admin can call this function. */ function pause() external { _isValidBorrowerOrLoanAdmin(); super._pause(); } /** @dev Triggers unpaused state. Restores functionality for certain functions. Only the Borrower or a Loan Admin can call this function. */ function unpause() external { _isValidBorrowerOrLoanAdmin(); super._unpause(); } /** @dev Sets a Loan Admin. Only the Borrower can call this function. @dev It emits a `LoanAdminSet` event. @param loanAdmin An address being allowed or disallowed as a Loan Admin. @param allowed Status of a Loan Admin. */ function setLoanAdmin(address loanAdmin, bool allowed) external { _whenProtocolNotPaused(); _isValidBorrower(); loanAdmins[loanAdmin] = allowed; emit LoanAdminSet(loanAdmin, allowed); } /**************************/ /*** Governor Functions ***/ /**************************/ /** @dev Transfers any locked funds to the Governor. Only the Governor can call this function. @param token Address of the token to be reclaimed. */ function reclaimERC20(address token) external { LoanLib.reclaimERC20(token, address(liquidityAsset), _globals(superFactory)); } /*********************/ /*** FDT Functions ***/ /*********************/ /** @dev Withdraws all available funds earned through LoanFDT for a token holder. @dev It emits a `BalanceUpdated` event. */ function withdrawFunds() public override { _whenProtocolNotPaused(); super.withdrawFunds(); emit BalanceUpdated(address(this), address(fundsToken), fundsToken.balanceOf(address(this))); } /************************/ /*** Getter Functions ***/ /************************/ /** @dev Returns the expected amount of Liquidity Asset to be recovered from a liquidation based on current oracle prices. @return The minimum amount of Liquidity Asset that can be expected by swapping Collateral Asset. */ function getExpectedAmountRecovered() external view returns (uint256) { uint256 liquidationAmt = _getCollateralLockerBalance(); return Util.calcMinAmount(_globals(superFactory), address(collateralAsset), address(liquidityAsset), liquidationAmt); } /** @dev Returns information of the next payment amount. @return [0] = Entitled interest of the next payment (Principal + Interest only when the next payment is last payment of the Loan) [1] = Entitled principal amount needed to be paid in the next payment [2] = Entitled interest amount needed to be paid in the next payment [3] = Payment Due Date [4] = Is Payment Late */ function getNextPayment() public view returns (uint256, uint256, uint256, uint256, bool) { return LoanLib.getNextPayment(repaymentCalc, nextPaymentDue, lateFeeCalc); } /** @dev Returns the information of a full payment amount. @return total Principal and interest owed, combined. @return principal Principal owed. @return interest Interest owed. */ function getFullPayment() public view returns (uint256 total, uint256 principal, uint256 interest) { (total, principal, interest) = LoanLib.getFullPayment(repaymentCalc, nextPaymentDue, lateFeeCalc, premiumCalc); } /** @dev Calculates the collateral required to draw down amount. @param amt The amount of the Liquidity Asset to draw down from the FundingLocker. @return The amount of the Collateral Asset required to post in the CollateralLocker for a given drawdown amount. */ function collateralRequiredForDrawdown(uint256 amt) public view returns (uint256) { return LoanLib.collateralRequiredForDrawdown( IERC20Details(address(collateralAsset)), IERC20Details(address(liquidityAsset)), collateralRatio, superFactory, amt ); } /************************/ /*** Helper Functions ***/ /************************/ /** @dev Checks that the protocol is not in a paused state. */ function _whenProtocolNotPaused() internal view { require(!_globals(superFactory).protocolPaused(), "L:PROTO_PAUSED"); } /** @dev Checks that `msg.sender` is the Borrower or a Loan Admin. */ function _isValidBorrowerOrLoanAdmin() internal view { require(msg.sender == borrower || loanAdmins[msg.sender], "L:NOT_BORROWER_OR_ADMIN"); } /** @dev Converts to WAD precision. */ function _toWad(uint256 amt) internal view returns (uint256) { return amt.mul(10 ** 18).div(10 ** IERC20Details(address(liquidityAsset)).decimals()); } /** @dev Returns the MapleGlobals instance. */ function _globals(address loanFactory) internal view returns (IMapleGlobals) { return IMapleGlobals(ILoanFactory(loanFactory).globals()); } /** @dev Returns the CollateralLocker balance. */ function _getCollateralLockerBalance() internal view returns (uint256) { return collateralAsset.balanceOf(collateralLocker); } /** @dev Returns the FundingLocker balance. */ function _getFundingLockerBalance() internal view returns (uint256) { return liquidityAsset.balanceOf(fundingLocker); } /** @dev Checks that the current state of the Loan matches the provided state. @param _state Enum of desired Loan state. */ function _isValidState(State _state) internal view { require(loanState == _state, "L:INVALID_STATE"); } /** @dev Checks that `msg.sender` is the Borrower. */ function _isValidBorrower() internal view { require(msg.sender == borrower, "L:NOT_BORROWER"); } /** @dev Checks that `msg.sender` is a Lender (LiquidityLocker) that is using an approved Pool to fund the Loan. */ function _isValidPool() internal view { address pool = ILiquidityLocker(msg.sender).pool(); address poolFactory = IPool(pool).superFactory(); require( _globals(superFactory).isValidPoolFactory(poolFactory) && IPoolFactory(poolFactory).isPool(pool), "L:INVALID_LENDER" ); } /** @dev Checks that "now" is currently within the funding period. */ function _isWithinFundingPeriod() internal view { require(block.timestamp <= createdAt.add(fundingPeriod), "L:PAST_FUNDING_PERIOD"); } /** @dev Transfers funds from the FundingLocker. @param from Instance of the FundingLocker. @param to Address to send funds to. @param value Amount to send. */ function _transferFunds(IFundingLocker from, address to, uint256 value) internal { from.pull(to, value); } /** @dev Emits a `BalanceUpdated` event for the Loan. @dev It emits a `BalanceUpdated` event. */ function _emitBalanceUpdateEventForLoan() internal { emit BalanceUpdated(address(this), address(liquidityAsset), liquidityAsset.balanceOf(address(this))); } /** @dev Emits a `BalanceUpdated` event for the FundingLocker. @dev It emits a `BalanceUpdated` event. */ function _emitBalanceUpdateEventForFundingLocker() internal { emit BalanceUpdated(fundingLocker, address(liquidityAsset), _getFundingLockerBalance()); } /** @dev Emits a `BalanceUpdated` event for the CollateralLocker. @dev It emits a `BalanceUpdated` event. */ function _emitBalanceUpdateEventForCollateralLocker() internal { emit BalanceUpdated(collateralLocker, address(collateralAsset), _getCollateralLockerBalance()); } }
True
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/** *Submitted for verification at Etherscan.io on 2020-12-23 */ // SPDX-License-Identifier: UNLICENSED pragma solidity ^0.6.0; /** * @title SafeMath * @dev Math operations with safety checks that throw on error * */ library SafeMath { function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; assert(c / a == b); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { // assert(b > 0); // Solidity automatically throws when dividing by 0 uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { assert(b <= a); return a - b; } function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; assert(c >= a); return c; } function ceil(uint a, uint m) internal pure returns (uint r) { return (a + m - 1) / m * m; } } // ---------------------------------------------------------------------------- // Owned contract // ---------------------------------------------------------------------------- contract Owned { address payable public owner; event OwnershipTransferred(address indexed _from, address indexed _to); constructor() public { owner = msg.sender; } modifier onlyOwner { require(msg.sender == owner); _; } function transferOwnership(address payable _newOwner) public onlyOwner { owner = _newOwner; emit OwnershipTransferred(msg.sender, _newOwner); } } // ---------------------------------------------------------------------------- // ERC Token Standard #20 Interface // ---------------------------------------------------------------------------- interface IToken { function transfer(address to, uint256 tokens) external returns (bool success); function burnTokens(uint256 _amount) external; function balanceOf(address tokenOwner) external view returns (uint256 balance); } contract Presale is Owned { using SafeMath for uint256; bool public isPresaleOpen; //@dev ERC20 token address and decimals address public tokenAddress; uint256 public tokenDecimals = 18; //@dev amount of tokens per ether 100 indicates 1 token per eth uint256 public tokenRatePerEth = 200_00; //@dev decimal for tokenRatePerEth, //2 means if you want 100 tokens per eth then set the rate as 100 + number of rateDecimals i.e => 10000 uint256 public rateDecimals = 2; //@dev max and min token buy limit per account uint256 public minEthLimit = 500 finney; uint256 public maxEthLimit = 2 ether; mapping(address => uint256) public usersInvestments; constructor() public { owner = msg.sender; } function startPresale() external onlyOwner{ require(!isPresaleOpen, "Presale is open"); isPresaleOpen = true; } function closePrsale() external onlyOwner{ require(isPresaleOpen, "Presale is not open yet."); isPresaleOpen = false; } function setTokenAddress(address token) external onlyOwner { require(tokenAddress == address(0), "Token address is already set."); require(token != address(0), "Token address zero not allowed."); tokenAddress = token; } function setTokenDecimals(uint256 decimals) external onlyOwner { tokenDecimals = decimals; } function setMinEthLimit(uint256 amount) external onlyOwner { minEthLimit = amount; } function setMaxEthLimit(uint256 amount) external onlyOwner { maxEthLimit = amount; } function setTokenRatePerEth(uint256 rate) external onlyOwner { tokenRatePerEth = rate; } function setRateDecimals(uint256 decimals) external onlyOwner { rateDecimals = decimals; } receive() external payable{ require(isPresaleOpen, "Presale is not open."); require( usersInvestments[msg.sender].add(msg.value) <= maxEthLimit && usersInvestments[msg.sender].add(msg.value) >= minEthLimit, "Installment Invalid." ); //@dev calculate the amount of tokens to transfer for the given eth uint256 tokenAmount = getTokensPerEth(msg.value); require(IToken(tokenAddress).transfer(msg.sender, tokenAmount), "Insufficient balance of presale contract!"); usersInvestments[msg.sender] = usersInvestments[msg.sender].add(msg.value); //@dev send received funds to the owner owner.transfer(msg.value); } function getTokensPerEth(uint256 amount) internal view returns(uint256) { return amount.mul(tokenRatePerEth).div( 10**(uint256(18).sub(tokenDecimals).add(rateDecimals)) ); } function burnUnsoldTokens() external onlyOwner { require(!isPresaleOpen, "You cannot burn tokens untitl the presale is closed."); IToken(tokenAddress).burnTokens(IToken(tokenAddress).balanceOf(address(this))); } function getUnsoldTokens() external onlyOwner { require(!isPresaleOpen, "You cannot get tokens until the presale is closed."); IToken(tokenAddress).transfer(owner, IToken(tokenAddress).balanceOf(address(this)) ); } }
True
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/** *Submitted for verification at Etherscan.io on 2022-03-11 */ // SPDX-License-Identifier: MIT // File: @openzeppelin/contracts/security/ReentrancyGuard.sol // OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol) pragma solidity ^0.8.0; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; constructor() { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and making it call a * `private` function that does the actual work. */ modifier nonReentrant() { // On the first call to nonReentrant, _notEntered will be true require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; _; // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } } // File: @openzeppelin/contracts/utils/cryptography/MerkleProof.sol // OpenZeppelin Contracts (last updated v4.5.0) (utils/cryptography/MerkleProof.sol) pragma solidity ^0.8.0; /** * @dev These functions deal with verification of Merkle Trees proofs. * * The proofs can be generated using the JavaScript library * https://github.com/miguelmota/merkletreejs[merkletreejs]. * Note: the hashing algorithm should be keccak256 and pair sorting should be enabled. * * See `test/utils/cryptography/MerkleProof.test.js` for some examples. */ library MerkleProof { /** * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree * defined by `root`. For this, a `proof` must be provided, containing * sibling hashes on the branch from the leaf to the root of the tree. Each * pair of leaves and each pair of pre-images are assumed to be sorted. */ function verify( bytes32[] memory proof, bytes32 root, bytes32 leaf ) internal pure returns (bool) { return processProof(proof, leaf) == root; } /** * @dev Returns the rebuilt hash obtained by traversing a Merklee tree up * from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt * hash matches the root of the tree. When processing the proof, the pairs * of leafs & pre-images are assumed to be sorted. * * _Available since v4.4._ */ function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) { bytes32 computedHash = leaf; for (uint256 i = 0; i < proof.length; i++) { bytes32 proofElement = proof[i]; if (computedHash <= proofElement) { // Hash(current computed hash + current element of the proof) computedHash = _efficientHash(computedHash, proofElement); } else { // Hash(current element of the proof + current computed hash) computedHash = _efficientHash(proofElement, computedHash); } } return computedHash; } function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) { assembly { mstore(0x00, a) mstore(0x20, b) value := keccak256(0x00, 0x40) } } } // File: @openzeppelin/contracts/utils/Strings.sol // OpenZeppelin Contracts v4.4.1 (utils/Strings.sol) pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); while (value != 0) { digits -= 1; buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); value /= 10; } return string(buffer); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0x00"; } uint256 temp = value; uint256 length = 0; while (temp != 0) { length++; temp >>= 8; } return toHexString(value, length); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _HEX_SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } } // File: @openzeppelin/contracts/utils/Context.sol // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } } // File: @openzeppelin/contracts/access/Ownable.sol // OpenZeppelin Contracts v4.4.1 (access/Ownable.sol) pragma solidity ^0.8.0; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(owner() == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } } // File: @openzeppelin/contracts/utils/Address.sol // OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } // File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol // OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol) pragma solidity ^0.8.0; /** * @title ERC721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC721 asset contracts. */ interface IERC721Receiver { /** * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} * by `operator` from `from`, this function is called. * * It must return its Solidity selector to confirm the token transfer. * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted. * * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`. */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); } // File: @openzeppelin/contracts/utils/introspection/IERC165.sol // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); } // File: @openzeppelin/contracts/utils/introspection/ERC165.sol // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } } // File: @openzeppelin/contracts/token/ERC721/IERC721.sol // OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol) pragma solidity ^0.8.0; /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes calldata data ) external; } // File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol // OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol) pragma solidity ^0.8.0; /** * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Enumerable is IERC721 { /** * @dev Returns the total amount of tokens stored by the contract. */ function totalSupply() external view returns (uint256); /** * @dev Returns a token ID owned by `owner` at a given `index` of its token list. * Use along with {balanceOf} to enumerate all of ``owner``'s tokens. */ function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256); /** * @dev Returns a token ID at a given `index` of all the tokens stored by the contract. * Use along with {totalSupply} to enumerate all tokens. */ function tokenByIndex(uint256 index) external view returns (uint256); } // File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol // OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol) pragma solidity ^0.8.0; /** * @title ERC-721 Non-Fungible Token Standard, optional metadata extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Metadata is IERC721 { /** * @dev Returns the token collection name. */ function name() external view returns (string memory); /** * @dev Returns the token collection symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token. */ function tokenURI(uint256 tokenId) external view returns (string memory); } // File: erc721a/contracts/ERC721A.sol pragma solidity ^0.8.4; /** * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including * the Metadata and Enumerable extension. Built to optimize for lower gas during batch mints. * * Assumes serials are sequentially minted starting at 0 (e.g. 0, 1, 2, 3..). * * Assumes the number of issuable tokens (collection size) is capped and fits in a uint128. * * Does not support burning tokens to address(0). */ contract ERC721A is Context, ERC165, IERC721, IERC721Metadata, IERC721Enumerable { using Address for address; using Strings for uint256; struct TokenOwnership { address addr; uint64 startTimestamp; } struct AddressData { uint128 balance; uint128 numberMinted; } // The tokenId of the next token to be minted. uint256 private currentIndex = 0; // Token name string private _name; // Token symbol string private _symbol; // Mapping from token ID to ownership details // An empty struct value does not necessarily mean the token is unowned. See ownershipOf implementation for details. mapping(uint256 => TokenOwnership) private _ownerships; // Mapping owner address to address data mapping(address => AddressData) private _addressData; // Mapping from token ID to approved address mapping(uint256 => address) private _tokenApprovals; // Mapping from owner to operator approvals mapping(address => mapping(address => bool)) private _operatorApprovals; /** * @dev * `maxBatchSize` refers to how much a minter can mint at a time. * `collectionSize_` refers to how many tokens are in the collection. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * To change the starting tokenId, please override this function. */ function _startTokenId() internal view virtual returns (uint256) { return 0; } /** * @dev See {IERC721Enumerable-totalSupply}. */ function totalSupply() public view override returns (uint256) { return currentIndex; } /** * @dev See {IERC721Enumerable-tokenByIndex}. */ function tokenByIndex(uint256 index) public view override returns (uint256) { require(index < totalSupply(), "ERC721A: global index out of bounds"); return index; } /** * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}. * This read function is O(collectionSize). If calling from a separate contract, be sure to test gas first. * It may also degrade with extremely large collection sizes (e.g >> 10000), test for your use case. */ function tokenOfOwnerByIndex(address owner, uint256 index) public view override returns (uint256) { require(index < balanceOf(owner), "ERC721A: owner index out of bounds"); uint256 numMintedSoFar = totalSupply(); uint256 tokenIdsIdx = 0; address currOwnershipAddr = address(0); for (uint256 i = 0; i < numMintedSoFar; i++) { TokenOwnership memory ownership = _ownerships[i]; if (ownership.addr != address(0)) { currOwnershipAddr = ownership.addr; } if (currOwnershipAddr == owner) { if (tokenIdsIdx == index) { return i; } tokenIdsIdx++; } } revert("ERC721A: unable to get token of owner by index"); } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) { return interfaceId == type(IERC721).interfaceId || interfaceId == type(IERC721Metadata).interfaceId || interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC721-balanceOf}. */ function balanceOf(address owner) public view override returns (uint256) { require(owner != address(0), "ERC721A: balance query for the zero address"); return uint256(_addressData[owner].balance); } function _numberMinted(address owner) internal view returns (uint256) { require( owner != address(0), "ERC721A: number minted query for the zero address"); return uint256(_addressData[owner].numberMinted); } function ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) { require(_exists(tokenId), "ERC721A: owner query for nonexistent token"); unchecked { for (uint256 curr = tokenId; curr >= 0; curr--) { TokenOwnership memory ownership = _ownerships[curr]; if (ownership.addr != address(0)) { return ownership; } } } revert("ERC721A: unable to determine the owner of token"); } /** * @dev See {IERC721-ownerOf}. */ function ownerOf(uint256 tokenId) public view override returns (address) { return ownershipOf(tokenId).addr; } /** * @dev See {IERC721Metadata-name}. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev See {IERC721Metadata-symbol}. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev See {IERC721Metadata-tokenURI}. */ function tokenURI(uint256 tokenId) public view virtual override returns (string memory) { require( _exists(tokenId), "ERC721Metadata: URI query for nonexistent token" ); string memory baseURI = _baseURI(); return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : ""; } /** * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each * token will be the concatenation of the `baseURI` and the `tokenId`. Empty * by default, can be overriden in child contracts. */ function _baseURI() internal view virtual returns (string memory) { return ""; } /** * @dev See {IERC721-approve}. */ function approve(address to, uint256 tokenId) public override { address owner = ERC721A.ownerOf(tokenId); require(to != owner, "ERC721A: approval to current owner"); require( _msgSender() == owner || isApprovedForAll(owner, _msgSender()), "ERC721A: approve caller is not owner nor approved for all" ); _approve(to, tokenId, owner); } /** * @dev See {IERC721-getApproved}. */ function getApproved(uint256 tokenId) public view override returns (address) { require(_exists(tokenId), "ERC721A: approved query for nonexistent token"); return _tokenApprovals[tokenId]; } /** * @dev See {IERC721-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public override { require(operator != _msgSender(), "ERC721A: approve to caller"); _operatorApprovals[_msgSender()][operator] = approved; emit ApprovalForAll(_msgSender(), operator, approved); } /** * @dev See {IERC721-isApprovedForAll}. */ function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) { return _operatorApprovals[owner][operator]; } /** * @dev See {IERC721-transferFrom}. */ function transferFrom( address from, address to, uint256 tokenId ) public override { _transfer(from, to, tokenId); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId ) public override { safeTransferFrom(from, to, tokenId, ""); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes memory _data ) public override { _transfer(from, to, tokenId); require( _checkOnERC721Received(from, to, tokenId, _data), "ERC721A: transfer to non ERC721Receiver implementer" ); } /** * @dev Returns whether `tokenId` exists. * * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}. * * Tokens start existing when they are minted (`_mint`), */ function _exists(uint256 tokenId) internal view returns (bool) { return tokenId < currentIndex; } function _safeMint(address to, uint256 quantity) internal { _safeMint(to, quantity, ""); } /** * @dev Mints `quantity` tokens and transfers them to `to`. * * Requirements: * * - there must be `quantity` tokens remaining unminted in the total collection. * - `to` cannot be the zero address. * - `quantity` cannot be larger than the max batch size. * * Emits a {Transfer} event. */ function _safeMint( address to, uint256 quantity, bytes memory _data ) internal { uint256 startTokenId = currentIndex; require(to != address(0), "ERC721A: mint to the zero address"); require(quantity != 0, "ERC721A: quantity must be greater than 0"); // We know if the first token in the batch doesn't exist, the other ones don't as well, because of serial ordering. require(!_exists(startTokenId), "ERC721A: token already minted"); _beforeTokenTransfers(address(0), to, startTokenId, quantity); unchecked { AddressData memory addressData = _addressData[to]; _addressData[to] = AddressData( addressData.balance + uint128(quantity), addressData.numberMinted + uint128(quantity) ); _ownerships[startTokenId] = TokenOwnership(to, uint64(block.timestamp)); uint256 updatedIndex = startTokenId; for (uint256 i = 0; i < quantity; i++) { emit Transfer(address(0), to, updatedIndex); require( _checkOnERC721Received(address(0), to, updatedIndex, _data), "ERC721A: transfer to non ERC721Receiver implementer" ); updatedIndex++; } currentIndex = updatedIndex; } _afterTokenTransfers(address(0), to, startTokenId, quantity); } /** * @dev Transfers `tokenId` from `from` to `to`. * * Requirements: * * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * * Emits a {Transfer} event. */ function _transfer( address from, address to, uint256 tokenId ) private { TokenOwnership memory prevOwnership = ownershipOf(tokenId); bool isApprovedOrOwner = (_msgSender() == prevOwnership.addr || getApproved(tokenId) == _msgSender() || isApprovedForAll(prevOwnership.addr, _msgSender())); require( isApprovedOrOwner, "ERC721A: transfer caller is not owner nor approved" ); require( prevOwnership.addr == from, "ERC721A: transfer from incorrect owner" ); require(to != address(0), "ERC721A: transfer to the zero address"); _beforeTokenTransfers(from, to, tokenId, 1); // Clear approvals from the previous owner _approve(address(0), tokenId, prevOwnership.addr); _addressData[from].balance -= 1; _addressData[to].balance += 1; _ownerships[tokenId] = TokenOwnership(to, uint64(block.timestamp)); // If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it. // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls. uint256 nextTokenId = tokenId + 1; if (_ownerships[nextTokenId].addr == address(0)) { if (_exists(nextTokenId)) { _ownerships[nextTokenId] = TokenOwnership( prevOwnership.addr, prevOwnership.startTimestamp ); } } emit Transfer(from, to, tokenId); _afterTokenTransfers(from, to, tokenId, 1); } /** * @dev Approve `to` to operate on `tokenId` * * Emits a {Approval} event. */ function _approve( address to, uint256 tokenId, address owner ) private { _tokenApprovals[tokenId] = to; emit Approval(owner, to, tokenId); } // uint256 public nextOwnerToExplicitlySet = 0; /** * @dev Explicitly set `owners` to eliminate loops in future calls of ownerOf(). */ // function _setOwnersExplicit(uint256 quantity) internal { // uint256 oldNextOwnerToSet = nextOwnerToExplicitlySet; // require(quantity > 0, "quantity must be nonzero"); // uint256 endIndex = oldNextOwnerToSet + quantity - 1; // if (endIndex > collectionSize - 1) { // endIndex = collectionSize - 1; // } // // We know if the last one in the group exists, all in the group exist, due to serial ordering. // require(_exists(endIndex), "not enough minted yet for this cleanup"); // for (uint256 i = oldNextOwnerToSet; i <= endIndex; i++) { // if (_ownerships[i].addr == address(0)) { // TokenOwnership memory ownership = ownershipOf(i); // _ownerships[i] = TokenOwnership( // ownership.addr, // ownership.startTimestamp // ); // } // } // nextOwnerToExplicitlySet = endIndex + 1; // } /** * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address. * The call is not executed if the target address is not a contract. * * @param from address representing the previous owner of the given token ID * @param to target address that will receive the tokens * @param tokenId uint256 ID of the token to be transferred * @param _data bytes optional data to send along with the call * @return bool whether the call correctly returned the expected magic value */ function _checkOnERC721Received( address from, address to, uint256 tokenId, bytes memory _data ) private returns (bool) { if (to.isContract()) { try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) { return retval == IERC721Receiver(to).onERC721Received.selector; } catch (bytes memory reason) { if (reason.length == 0) { revert("ERC721A: transfer to non ERC721Receiver implementer"); } else { assembly { revert(add(32, reason), mload(reason)) } } } } else { return true; } } /** * @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting. * * startTokenId - the first token id to be transferred * quantity - the amount to be transferred * * Calling conditions: * * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. */ function _beforeTokenTransfers( address from, address to, uint256 startTokenId, uint256 quantity ) internal virtual {} /** * @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes * minting. * * startTokenId - the first token id to be transferred * quantity - the amount to be transferred * * Calling conditions: * * - when `from` and `to` are both non-zero. * - `from` and `to` are never both zero. */ function _afterTokenTransfers( address from, address to, uint256 startTokenId, uint256 quantity ) internal virtual {} } pragma solidity ^0.8.6; contract FKN is ERC721A, Ownable,ReentrancyGuard { using Strings for uint256; //Basic Configs uint256 public maxSupply = 10000; uint256 public _price = 0.18 ether; uint256 public maxMintAmountPerTx = 5; //Reveal/NonReveal string public _baseTokenURI; string public _baseTokenEXT = ".json"; string public notRevealedUri; bool public revealed = false; bool public _paused = false; //PRESALE MODES uint256 public whitelistMaxMint = 5; bytes32 public merkleRoot = 0x9d997719c0a5b5f6db9b8ac69a988be57cf324cb9fffd51dc2c37544bb520d65; bool public whitelistSale = false; uint256 public whitelistPrice = 0.01 ether; bool public vipSaleStarted = false; struct MintTracker{ uint256 _regular; uint256 _whitelist; } mapping(address => MintTracker) public _totalMinted; // withdraw addresses address t1 = 0xB95dd339Eec8e688c91d305a88F5733D18f709E1; address t2 = 0xE02B033625D6917F0011245F3192dEeE73A3B40f; constructor(string memory _initBaseURI) ERC721A("Fkn Rich Sharks", "FKN") { changeURLParams(_initBaseURI); } modifier mintCompliance(uint256 _mintAmount) { require(_mintAmount > 0 && _mintAmount <= maxMintAmountPerTx, "Invalid mint amount!"); uint256 supply = totalSupply(); require(supply + _mintAmount <= maxSupply , ": No more NFTs to mint, decrease the quantity or check out OpenSea."); _; } function mintRegular(uint256 _mintAmount, address _receiver) private { _safeMint(_receiver, _mintAmount); _totalMinted[_receiver]._regular+=_mintAmount; } function mint(uint256 _mintAmount) public payable mintCompliance(_mintAmount) { require(!_paused, ": Contract Execution paused."); require(!whitelistSale, ": Contract paused."); require(_mintAmount > 0, ": Amount should be greater than 0."); require(msg.value >= _price * _mintAmount,"Insufficient FUnd"); mintRegular(_mintAmount, msg.sender); } function WhiteListMint( uint256 _mintAmount, bytes32[] calldata _merkleProof) public payable mintCompliance(_mintAmount) { require(!_paused, ": Contract Execution paused."); require(whitelistSale, ": Whitelist is paused."); require(_mintAmount > 0, ": Amount should be greater than 0."); require(msg.value >= whitelistPrice * _mintAmount,"Insufficient FUnd"); bytes32 leaf = keccak256(abi.encodePacked(msg.sender)); require(MerkleProof.verify(_merkleProof, merkleRoot, leaf), "You are Not whitelisted"); _safeMint(msg.sender, _mintAmount); _totalMinted[msg.sender]._whitelist+=_mintAmount; } function mintForAddress(uint256 _mintAmount, address _receiver) public mintCompliance(_mintAmount) onlyOwner { mintRegular(_mintAmount, _receiver); } function _baseURI() internal view virtual override returns (string memory) { return _baseTokenURI; } function tokenURI(uint256 tokenId) public view virtual override returns (string memory) { require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token"); if (revealed == false) { return notRevealedUri; } else { string memory currentBaseURI = _baseURI(); return bytes(currentBaseURI).length > 0 ? string(abi.encodePacked(currentBaseURI, tokenId.toString(),_baseTokenEXT)) : ""; } } function setNotRevealedURI(string memory _notRevealedURI) public onlyOwner { notRevealedUri = _notRevealedURI; } function pause(bool val) public onlyOwner() { _paused = val; } function toogleWhiteList() public onlyOwner{ whitelistSale = !whitelistSale; } function toogleReveal() public onlyOwner{ revealed = !revealed; } function changeURLParams(string memory _nURL) public onlyOwner { _baseTokenURI = _nURL; } function setPrice(uint256 newPrice) public onlyOwner() { _price = newPrice; } function setWhiteListPrice(uint256 newPrice) public onlyOwner() { whitelistPrice = newPrice; } function setMerkleRoot(bytes32 merkleHash) public onlyOwner { merkleRoot = merkleHash; } function withdrawMoney() external onlyOwner nonReentrant { (bool success, ) = msg.sender.call{value: address(this).balance}(""); require(success, "Transfer failed."); } function withdrawAll() external payable onlyOwner { uint256 _each = address(this).balance / 2; require(payable(t1).send(_each)); require(payable(t2).send(_each)); } }
True
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/** *Submitted for verification at Etherscan.io on 2021-12-07 */ // SPDX-License-Identifier: agpl-3.0 pragma solidity 0.6.12; interface IProposalExecutor { function execute() external; } interface IProxyWithAdminActions { event AdminChanged(address previousAdmin, address newAdmin); function changeAdmin(address newAdmin) external; } contract MigratorProposalPayload is IProposalExecutor { event ProposalExecuted(); address public constant SHORT_EXECUTOR_V2=0xEE56e2B3D491590B5b31738cC34d5232F378a8D5; address public constant MIGRATOR_PROXY=0x317625234562B1526Ea2FaC4030Ea499C5291de4; /** * @dev Payload execution function, called once a proposal passed in the Aave governance */ function execute() external override { IProxyWithAdminActions(MIGRATOR_PROXY).changeAdmin(SHORT_EXECUTOR_V2); emit ProposalExecuted(); } }
True
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/** *Submitted for verification at Etherscan.io on 2022-04-01 */ // File: contracts/ERC20.sol // SPDX-License-Identifier: Unlicensed pragma solidity ^0.8.9; abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } } interface IERC20 { function totalSupply() external view returns (uint256); function balanceOf(address account) external view returns (uint256); function transfer(address recipient, uint256 amount) external returns (bool); function allowance(address owner, address spender) external view returns (uint256); function approve(address spender, uint256 amount) external returns (bool); function transferFrom( address sender, address recipient, uint256 amount ) external returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); event Approval( address indexed owner, address indexed spender, uint256 value ); } contract Ownable is Context { address private _owner; address private _previousOwner; event OwnershipTransferred( address indexed previousOwner, address indexed newOwner ); constructor() { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } function owner() public view returns (address) { return _owner; } modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } library SafeMath { function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } function sub( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } function div( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; return c; } } interface IUniswapV2Factory { function createPair(address tokenA, address tokenB) external returns (address pair); } interface IUniswapV2Router02 { function swapExactTokensForETHSupportingFeeOnTransferTokens( uint256 amountIn, uint256 amountOutMin, address[] calldata path, address to, uint256 deadline ) external; function factory() external pure returns (address); function WETH() external pure returns (address); function addLiquidityETH( address token, uint256 amountTokenDesired, uint256 amountTokenMin, uint256 amountETHMin, address to, uint256 deadline ) external payable returns ( uint256 amountToken, uint256 amountETH, uint256 liquidity ); } contract AprilFoolsDoge is Context, IERC20, Ownable { using SafeMath for uint256; string private constant _name = "AprilFoolsDoge"; string private constant _symbol = "AFDOGE"; uint8 private constant _decimals = 9; mapping(address => uint256) private _rOwned; mapping(address => uint256) private _tOwned; mapping(address => mapping(address => uint256)) private _allowances; mapping(address => bool) private _isExcludedFromFee; uint256 private constant MAX = ~uint256(0); uint256 private constant _tTotal = 1e9 * 10**9; uint256 private _rTotal = (MAX - (MAX % _tTotal)); uint256 private _tFeeTotal; uint256 private _redisFeeOnBuy = 6; uint256 private _taxFeeOnBuy = 6; uint256 private _redisFeeOnSell = 3; uint256 private _taxFeeOnSell = 9; uint256 private _redisFee = _redisFeeOnSell; uint256 private _taxFee = _taxFeeOnSell; uint256 private _previousredisFee = _redisFee; uint256 private _previoustaxFee = _taxFee; mapping(address => bool) public bots; mapping (address => uint256) public _buyMap; address payable private _marketingAddress ; IUniswapV2Router02 public uniswapV2Router; address public uniswapV2Pair; bool private tradingOpen; bool private inSwap = false; bool private swapEnabled = true; uint256 public _maxTxAmount = 1000000000 * 10**9; uint256 public _maxWalletSize = 20000000 * 10**9; uint256 public _swapTokensAtAmount = 10000000 * 10**9; event MaxTxAmountUpdated(uint256 _maxTxAmount); modifier lockTheSwap { inSwap = true; _; inSwap = false; } constructor() { _rOwned[_msgSender()] = _rTotal; _marketingAddress = payable(_msgSender()); _isExcludedFromFee[owner()] = true; _isExcludedFromFee[address(this)] = true; _isExcludedFromFee[_marketingAddress] = true; emit Transfer(address(0), _msgSender(), _tTotal); } function name() public pure returns (string memory) { return _name; } function symbol() public pure returns (string memory) { return _symbol; } function decimals() public pure returns (uint8) { return _decimals; } function totalSupply() public pure override returns (uint256) { return _tTotal; } function balanceOf(address account) public view override returns (uint256) { return tokenFromReflection(_rOwned[account]); } function transfer(address recipient, uint256 amount) public override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } function allowance(address owner, address spender) public view override returns (uint256) { return _allowances[owner][spender]; } function approve(address spender, uint256 amount) public override returns (bool) { _approve(_msgSender(), spender, amount); return true; } function transferFrom( address sender, address recipient, uint256 amount ) public override returns (bool) { _transfer(sender, recipient, amount); _approve( sender, _msgSender(), _allowances[sender][_msgSender()].sub( amount, "ERC20: transfer amount exceeds allowance" ) ); return true; } function tokenFromReflection(uint256 rAmount) private view returns (uint256) { require( rAmount <= _rTotal, "Amount must be less than total reflections" ); uint256 currentRate = _getRate(); return rAmount.div(currentRate); } function removeAllFee() private { if (_redisFee == 0 && _taxFee == 0) return; _previousredisFee = _redisFee; _previoustaxFee = _taxFee; _redisFee = 0; _taxFee = 0; } function restoreAllFee() private { _redisFee = _previousredisFee; _taxFee = _previoustaxFee; } function _approve( address owner, address spender, uint256 amount ) private { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } function _transfer( address from, address to, uint256 amount ) private { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); require(amount > 0, "Transfer amount must be greater than zero"); if (from != owner() && to != owner()) { if (!tradingOpen) { require(from == owner(), "TOKEN: This account cannot send tokens until trading is enabled"); } require(amount <= _maxTxAmount, "TOKEN: Max Transaction Limit"); require(!bots[from] && !bots[to], "TOKEN: Your account is blacklisted!"); if(to != uniswapV2Pair) { require(balanceOf(to) + amount < _maxWalletSize, "TOKEN: Balance exceeds wallet size!"); } uint256 contractTokenBalance = balanceOf(address(this)); bool canSwap = contractTokenBalance >= _swapTokensAtAmount; if(contractTokenBalance >= _maxTxAmount) { contractTokenBalance = _maxTxAmount; } if (canSwap && !inSwap && from != uniswapV2Pair && swapEnabled && !_isExcludedFromFee[from] && !_isExcludedFromFee[to]) { swapTokensForEth(contractTokenBalance); uint256 contractETHBalance = address(this).balance; if (contractETHBalance > 0) { sendETHToFee(address(this).balance); } } } bool takeFee = true; if ((_isExcludedFromFee[from] || _isExcludedFromFee[to]) || (from != uniswapV2Pair && to != uniswapV2Pair)) { takeFee = false; } else { if(from == uniswapV2Pair && to != address(uniswapV2Router)) { _redisFee = _redisFeeOnBuy; _taxFee = _taxFeeOnBuy; } if (to == uniswapV2Pair && from != address(uniswapV2Router)) { _redisFee = _redisFeeOnSell; _taxFee = _taxFeeOnSell; } } _tokenTransfer(from, to, amount, takeFee); } function swapTokensForEth(uint256 tokenAmount) private lockTheSwap { address[] memory path = new address[](2); path[0] = address(this); path[1] = uniswapV2Router.WETH(); _approve(address(this), address(uniswapV2Router), tokenAmount); uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens( tokenAmount, 0, path, address(this), block.timestamp ); } function sendETHToFee(uint256 amount) private { _marketingAddress.transfer(amount); } function Initialize() external onlyOwner(){ IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); uniswapV2Router = _uniswapV2Router; uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()) .createPair(address(this), _uniswapV2Router.WETH()); } function setTrading(bool _tradingOpen) public onlyOwner { require(!tradingOpen); tradingOpen = _tradingOpen; } function manualswap() external { require(_msgSender() == _marketingAddress); uint256 contractBalance = balanceOf(address(this)); swapTokensForEth(contractBalance); } function manualsend() external { require(_msgSender() == _marketingAddress); uint256 contractETHBalance = address(this).balance; sendETHToFee(contractETHBalance); } function blockBots(address[] memory bots_) public onlyOwner { for (uint256 i = 0; i < bots_.length; i++) { bots[bots_[i]] = true; } } function unblockBot(address notbot) public onlyOwner { bots[notbot] = false; } function _tokenTransfer( address sender, address recipient, uint256 amount, bool takeFee ) private { if (!takeFee) removeAllFee(); _transferStandard(sender, recipient, amount); if (!takeFee) restoreAllFee(); } function _transferStandard( address sender, address recipient, uint256 tAmount ) private { ( uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam ) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _takeTeam(tTeam); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function _takeTeam(uint256 tTeam) private { uint256 currentRate = _getRate(); uint256 rTeam = tTeam.mul(currentRate); _rOwned[address(this)] = _rOwned[address(this)].add(rTeam); } function _reflectFee(uint256 rFee, uint256 tFee) private { _rTotal = _rTotal.sub(rFee); _tFeeTotal = _tFeeTotal.add(tFee); } receive() external payable {} function _getValues(uint256 tAmount) private view returns ( uint256, uint256, uint256, uint256, uint256, uint256 ) { (uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getTValues(tAmount, _redisFee, _taxFee); uint256 currentRate = _getRate(); (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tTeam, currentRate); return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam); } function _getTValues( uint256 tAmount, uint256 redisFee, uint256 taxFee ) private pure returns ( uint256, uint256, uint256 ) { uint256 tFee = tAmount.mul(redisFee).div(100); uint256 tTeam = tAmount.mul(taxFee).div(100); uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam); return (tTransferAmount, tFee, tTeam); } function _getRValues( uint256 tAmount, uint256 tFee, uint256 tTeam, uint256 currentRate ) private pure returns ( uint256, uint256, uint256 ) { uint256 rAmount = tAmount.mul(currentRate); uint256 rFee = tFee.mul(currentRate); uint256 rTeam = tTeam.mul(currentRate); uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam); return (rAmount, rTransferAmount, rFee); } function _getRate() private view returns (uint256) { (uint256 rSupply, uint256 tSupply) = _getCurrentSupply(); return rSupply.div(tSupply); } function _getCurrentSupply() private view returns (uint256, uint256) { uint256 rSupply = _rTotal; uint256 tSupply = _tTotal; if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal); return (rSupply, tSupply); } function setFee(uint256 redisFeeOnBuy, uint256 redisFeeOnSell, uint256 taxFeeOnBuy, uint256 taxFeeOnSell) public onlyOwner { require(taxFeeOnBuy<=_taxFeeOnBuy||taxFeeOnSell<=_taxFeeOnSell); _redisFeeOnBuy = redisFeeOnBuy; _redisFeeOnSell = redisFeeOnSell; _taxFeeOnBuy = taxFeeOnBuy; _taxFeeOnSell = taxFeeOnSell; } function setMinSwapTokensThreshold(uint256 swapTokensAtAmount) external onlyOwner { _swapTokensAtAmount = swapTokensAtAmount; } function toggleSwap(bool _swapEnabled) external onlyOwner{ swapEnabled = _swapEnabled; } function setMaxTxnAmount(uint256 maxTxAmount) external onlyOwner { require(maxTxAmount > 5000000 * 10**9 ); _maxTxAmount = maxTxAmount; } function setMaxWalletSize(uint256 maxWalletSize) public onlyOwner { _maxWalletSize = maxWalletSize; } function excludeMultipleAccountsFromFees(address[] calldata accounts, bool excluded) public onlyOwner { for(uint256 i = 0; i < accounts.length; i++) { _isExcludedFromFee[accounts[i]] = excluded; } } }
True
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pragma solidity ^0.4.19; // ---------------------------------------------------------------------------- // Safe maths // ---------------------------------------------------------------------------- library SafeMath { function add(uint a, uint b) internal pure returns (uint c) { c = a + b; require(c >= a); } function sub(uint a, uint b) internal pure returns (uint c) { require(b <= a); c = a - b; } function mul(uint a, uint b) internal pure returns (uint c) { c = a * b; require(a == 0 || c / a == b); } function div(uint a, uint b) internal pure returns (uint c) { require(b > 0); c = a / b; } } // ---------------------------------------------------------------------------- // ERC Token Standard #20 Interface // https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md // ---------------------------------------------------------------------------- contract ERC20Interface { function totalSupply() public constant returns (uint); function balanceOf(address tokenOwner) public constant returns (uint balance); function allowance(address tokenOwner, address spender) public constant returns (uint remaining); function transfer(address to, uint tokens) public returns (bool success); function approve(address spender, uint tokens) public returns (bool success); function transferFrom(address from, address to, uint tokens) public returns (bool success); event Transfer(address indexed from, address indexed to, uint tokens); event Approval(address indexed tokenOwner, address indexed spender, uint tokens); } // ---------------------------------------------------------------------------- // Contract function to receive approval and execute function in one call // // Borrowed from MiniMeToken // ---------------------------------------------------------------------------- contract ApproveAndCallFallBack { function receiveApproval(address from, uint256 tokens, address token, bytes data) public; } // ---------------------------------------------------------------------------- // Owned contract // ---------------------------------------------------------------------------- contract Owned { address public owner; address public newOwner; event OwnershipTransferred(address indexed _from, address indexed _to); function Owned() public { owner = msg.sender; } modifier onlyOwner { require(msg.sender == owner); _; } function transferOwnership(address _newOwner) public onlyOwner { newOwner = _newOwner; } function acceptOwnership() public { require(msg.sender == newOwner); OwnershipTransferred(owner, newOwner); owner = newOwner; newOwner = address(0); } } // ---------------------------------------------------------------------------- // ERC20 Token, with the addition of symbol, name and decimals and an // initial fixed supply // ---------------------------------------------------------------------------- contract ERC20Token is ERC20Interface, Owned { using SafeMath for uint; string public symbol; string public name; uint8 public decimals; uint public _totalSupply; mapping(address => uint) balances; mapping(address => mapping(address => uint)) allowed; // ------------------------------------------------------------------------ // Constructor // ------------------------------------------------------------------------ function ERC20Token() public { symbol = "DBD"; name = "Dubai Exchange Dollar"; decimals = 18; _totalSupply = 1144729886 * 10**uint(decimals); balances[owner] = _totalSupply; Transfer(address(0), owner, _totalSupply); } // ------------------------------------------------------------------------ // Total supply // ------------------------------------------------------------------------ function totalSupply() public constant returns (uint) { return _totalSupply - balances[address(0)]; } // ------------------------------------------------------------------------ // Get the token balance for account `tokenOwner` // ------------------------------------------------------------------------ function balanceOf(address tokenOwner) public constant returns (uint balance) { return balances[tokenOwner]; } // ------------------------------------------------------------------------ // Transfer the balance from token owner&#39;s account to `to` account // - Owner&#39;s account must have sufficient balance to transfer // - 0 value transfers are allowed // ------------------------------------------------------------------------ function transfer(address to, uint tokens) public returns (bool success) { balances[msg.sender] = balances[msg.sender].sub(tokens); balances[to] = balances[to].add(tokens); Transfer(msg.sender, to, tokens); return true; } // ------------------------------------------------------------------------ // Token owner can approve for `spender` to transferFrom(...) `tokens` // from the token owner&#39;s account // // https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md // recommends that there are no checks for the approval double-spend attack // as this should be implemented in user interfaces // ------------------------------------------------------------------------ function approve(address spender, uint tokens) public returns (bool success) { allowed[msg.sender][spender] = tokens; Approval(msg.sender, spender, tokens); return true; } // ------------------------------------------------------------------------ // Transfer `tokens` from the `from` account to the `to` account // // The calling account must already have sufficient tokens approve(...)-d // for spending from the `from` account and // - From account must have sufficient balance to transfer // - Spender must have sufficient allowance to transfer // - 0 value transfers are allowed // ------------------------------------------------------------------------ function transferFrom(address from, address to, uint tokens) public returns (bool success) { balances[from] = balances[from].sub(tokens); allowed[from][msg.sender] = allowed[from][msg.sender].sub(tokens); balances[to] = balances[to].add(tokens); Transfer(from, to, tokens); return true; } // ------------------------------------------------------------------------ // Returns the amount of tokens approved by the owner that can be // transferred to the spender&#39;s account // ------------------------------------------------------------------------ function allowance(address tokenOwner, address spender) public constant returns (uint remaining) { return allowed[tokenOwner][spender]; } // ------------------------------------------------------------------------ // Token owner can approve for `spender` to transferFrom(...) `tokens` // from the token owner&#39;s account. The `spender` contract function // `receiveApproval(...)` is then executed // ------------------------------------------------------------------------ function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) { allowed[msg.sender][spender] = tokens; Approval(msg.sender, spender, tokens); ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data); return true; } // ------------------------------------------------------------------------ // Don&#39;t accept ETH // ------------------------------------------------------------------------ function () public payable { revert(); } // ------------------------------------------------------------------------ // Owner can transfer out any accidentally sent ERC20 tokens // ------------------------------------------------------------------------ function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) { return ERC20Interface(tokenAddress).transfer(owner, tokens); } }
True
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/** *Submitted for verification at Etherscan.io on 2021-11-15 */ // File contracts/libraries/SafeMath.sol // SPDX-License-Identifier: AGPL-3.0-or-later pragma solidity 0.7.5; library SafeMath { function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; return c; } function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } function sqrrt(uint256 a) internal pure returns (uint c) { if (a > 3) { c = a; uint b = add( div( a, 2), 1 ); while (b < c) { c = b; b = div( add( div( a, b ), b), 2 ); } } else if (a != 0) { c = 1; } } } // File contracts/libraries/Address.sol pragma solidity 0.7.5; library Address { function isContract(address account) internal view returns (bool) { uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: value }(data); return _verifyCallResult(success, returndata, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.staticcall(data); return _verifyCallResult(success, returndata, errorMessage); } function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.delegatecall(data); return _verifyCallResult(success, returndata, errorMessage); } function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) { if (success) { return returndata; } else { if (returndata.length > 0) { assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } function addressToString(address _address) internal pure returns(string memory) { bytes32 _bytes = bytes32(uint256(_address)); bytes memory HEX = "0123456789abcdef"; bytes memory _addr = new bytes(42); _addr[0] = '0'; _addr[1] = 'x'; for(uint256 i = 0; i < 20; i++) { _addr[2+i*2] = HEX[uint8(_bytes[i + 12] >> 4)]; _addr[3+i*2] = HEX[uint8(_bytes[i + 12] & 0x0f)]; } return string(_addr); } } // File contracts/interfaces/IERC20.sol pragma solidity 0.7.5; interface IERC20 { function decimals() external view returns (uint8); function totalSupply() external view returns (uint256); function balanceOf(address account) external view returns (uint256); function transfer(address recipient, uint256 amount) external returns (bool); function allowance(address owner, address spender) external view returns (uint256); function approve(address spender, uint256 amount) external returns (bool); function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); event Approval(address indexed owner, address indexed spender, uint256 value); } // File contracts/libraries/SafeERC20.sol pragma solidity 0.7.5; library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } function safeApprove(IERC20 token, address spender, uint256 value) internal { require((value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function _callOptionalReturn(IERC20 token, bytes memory data) private { bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } } // File contracts/libraries/FullMath.sol pragma solidity 0.7.5; library FullMath { function fullMul(uint256 x, uint256 y) private pure returns (uint256 l, uint256 h) { uint256 mm = mulmod(x, y, uint256(-1)); l = x * y; h = mm - l; if (mm < l) h -= 1; } function fullDiv( uint256 l, uint256 h, uint256 d ) private pure returns (uint256) { uint256 pow2 = d & -d; d /= pow2; l /= pow2; l += h * ((-pow2) / pow2 + 1); uint256 r = 1; r *= 2 - d * r; r *= 2 - d * r; r *= 2 - d * r; r *= 2 - d * r; r *= 2 - d * r; r *= 2 - d * r; r *= 2 - d * r; r *= 2 - d * r; return l * r; } function mulDiv( uint256 x, uint256 y, uint256 d ) internal pure returns (uint256) { (uint256 l, uint256 h) = fullMul(x, y); uint256 mm = mulmod(x, y, d); if (mm > l) h -= 1; l -= mm; require(h < d, 'FullMath::mulDiv: overflow'); return fullDiv(l, h, d); } } // File contracts/libraries/FixedPoint.sol pragma solidity 0.7.5; library Babylonian { function sqrt(uint256 x) internal pure returns (uint256) { if (x == 0) return 0; uint256 xx = x; uint256 r = 1; if (xx >= 0x100000000000000000000000000000000) { xx >>= 128; r <<= 64; } if (xx >= 0x10000000000000000) { xx >>= 64; r <<= 32; } if (xx >= 0x100000000) { xx >>= 32; r <<= 16; } if (xx >= 0x10000) { xx >>= 16; r <<= 8; } if (xx >= 0x100) { xx >>= 8; r <<= 4; } if (xx >= 0x10) { xx >>= 4; r <<= 2; } if (xx >= 0x8) { r <<= 1; } r = (r + x / r) >> 1; r = (r + x / r) >> 1; r = (r + x / r) >> 1; r = (r + x / r) >> 1; r = (r + x / r) >> 1; r = (r + x / r) >> 1; r = (r + x / r) >> 1; // Seven iterations should be enough uint256 r1 = x / r; return (r < r1 ? r : r1); } } library BitMath { function mostSignificantBit(uint256 x) internal pure returns (uint8 r) { require(x > 0, 'BitMath::mostSignificantBit: zero'); if (x >= 0x100000000000000000000000000000000) { x >>= 128; r += 128; } if (x >= 0x10000000000000000) { x >>= 64; r += 64; } if (x >= 0x100000000) { x >>= 32; r += 32; } if (x >= 0x10000) { x >>= 16; r += 16; } if (x >= 0x100) { x >>= 8; r += 8; } if (x >= 0x10) { x >>= 4; r += 4; } if (x >= 0x4) { x >>= 2; r += 2; } if (x >= 0x2) r += 1; } } library FixedPoint { struct uq112x112 { uint224 _x; } struct uq144x112 { uint256 _x; } uint8 private constant RESOLUTION = 112; uint256 private constant Q112 = 0x10000000000000000000000000000; uint256 private constant Q224 = 0x100000000000000000000000000000000000000000000000000000000; uint256 private constant LOWER_MASK = 0xffffffffffffffffffffffffffff; // decimal of UQ*x112 (lower 112 bits) function decode(uq112x112 memory self) internal pure returns (uint112) { return uint112(self._x >> RESOLUTION); } function decode112with18(uq112x112 memory self) internal pure returns (uint) { return uint(self._x) / 5192296858534827; } function fraction(uint256 numerator, uint256 denominator) internal pure returns (uq112x112 memory) { require(denominator > 0, 'FixedPoint::fraction: division by zero'); if (numerator == 0) return FixedPoint.uq112x112(0); if (numerator <= uint144(-1)) { uint256 result = (numerator << RESOLUTION) / denominator; require(result <= uint224(-1), 'FixedPoint::fraction: overflow'); return uq112x112(uint224(result)); } else { uint256 result = FullMath.mulDiv(numerator, Q112, denominator); require(result <= uint224(-1), 'FixedPoint::fraction: overflow'); return uq112x112(uint224(result)); } } // square root of a UQ112x112 // lossy between 0/1 and 40 bits function sqrt(uq112x112 memory self) internal pure returns (uq112x112 memory) { if (self._x <= uint144(-1)) { return uq112x112(uint224(Babylonian.sqrt(uint256(self._x) << 112))); } uint8 safeShiftBits = 255 - BitMath.mostSignificantBit(self._x); safeShiftBits -= safeShiftBits % 2; return uq112x112(uint224(Babylonian.sqrt(uint256(self._x) << safeShiftBits) << ((112 - safeShiftBits) / 2))); } } // File contracts/interfaces/ITreasury.sol pragma solidity 0.7.5; interface ITreasury { function deposit(address _principleTokenAddress, uint _amountPrincipleToken, uint _amountPayoutToken) external; function valueOfToken( address _principleTokenAddress, uint _amount ) external view returns ( uint value_ ); } // File contracts/types/Ownable.sol pragma solidity 0.7.5; contract Ownable { address public policy; constructor () { policy = msg.sender; } modifier onlyPolicy() { require( policy == msg.sender, "Ownable: caller is not the owner" ); _; } function transferManagment(address _newOwner) external onlyPolicy() { require( _newOwner != address(0) ); policy = _newOwner; } } // File contracts/OlympusProCustomBond.sol pragma solidity 0.7.5; contract CustomBond is Ownable { using FixedPoint for *; using SafeERC20 for IERC20; using SafeMath for uint; /* ======== EVENTS ======== */ event BondCreated( uint deposit, uint payout, uint expires ); event BondRedeemed( address recipient, uint payout, uint remaining ); event BondPriceChanged( uint internalPrice, uint debtRatio ); event ControlVariableAdjustment( uint initialBCV, uint newBCV, uint adjustment, bool addition ); /* ======== STATE VARIABLES ======== */ IERC20 immutable payoutToken; // token paid for principal IERC20 immutable principalToken; // inflow token ITreasury immutable customTreasury; // pays for and receives principal address immutable olympusDAO; address olympusTreasury; // receives fee uint public totalPrincipalBonded; uint public totalPayoutGiven; Terms public terms; // stores terms for new bonds Adjust public adjustment; // stores adjustment to BCV data FeeTiers[] private feeTiers; // stores fee tiers mapping( address => Bond ) public bondInfo; // stores bond information for depositors uint public totalDebt; // total value of outstanding bonds; used for pricing uint public lastDecay; // reference block for debt decay address immutable subsidyRouter; // pays subsidy in OHM to custom treasury uint payoutSinceLastSubsidy; // principal accrued since subsidy paid /* ======== STRUCTS ======== */ struct FeeTiers { uint tierCeilings; // principal bonded till next tier uint fees; // in ten-thousandths (i.e. 33300 = 3.33%) } // Info for creating new bonds struct Terms { uint controlVariable; // scaling variable for price uint vestingTerm; // in blocks uint minimumPrice; // vs principal value uint maxPayout; // in thousandths of a %. i.e. 500 = 0.5% uint maxDebt; // payout token decimal debt ratio, max % total supply created as debt } // Info for bond holder struct Bond { uint payout; // payout token remaining to be paid uint vesting; // Blocks left to vest uint lastBlock; // Last interaction uint truePricePaid; // Price paid (principal tokens per payout token) in ten-millionths - 4000000 = 0.4 } // Info for incremental adjustments to control variable struct Adjust { bool add; // addition or subtraction uint rate; // increment uint target; // BCV when adjustment finished uint buffer; // minimum length (in blocks) between adjustments uint lastBlock; // block when last adjustment made } /* ======== CONSTRUCTOR ======== */ constructor( address _customTreasury, address _payoutToken, address _principalToken, address _olympusTreasury, address _subsidyRouter, address _initialOwner, address _olympusDAO, uint[] memory _tierCeilings, uint[] memory _fees ) { require( _customTreasury != address(0) ); customTreasury = ITreasury( _customTreasury ); require( _payoutToken != address(0) ); payoutToken = IERC20( _payoutToken ); require( _principalToken != address(0) ); principalToken = IERC20( _principalToken ); require( _olympusTreasury != address(0) ); olympusTreasury = _olympusTreasury; require( _subsidyRouter != address(0) ); subsidyRouter = _subsidyRouter; require( _initialOwner != address(0) ); policy = _initialOwner; require( _olympusDAO != address(0) ); olympusDAO = _olympusDAO; require(_tierCeilings.length == _fees.length, "tier length and fee length not the same"); for(uint i; i < _tierCeilings.length; i++) { feeTiers.push( FeeTiers({ tierCeilings: _tierCeilings[i], fees: _fees[i] })); } } /* ======== INITIALIZATION ======== */ /** * @notice initializes bond parameters * @param _controlVariable uint * @param _vestingTerm uint * @param _minimumPrice uint * @param _maxPayout uint * @param _maxDebt uint * @param _initialDebt uint */ function initializeBond( uint _controlVariable, uint _vestingTerm, uint _minimumPrice, uint _maxPayout, uint _maxDebt, uint _initialDebt ) external onlyPolicy() { require( currentDebt() == 0, "Debt must be 0 for initialization" ); terms = Terms ({ controlVariable: _controlVariable, vestingTerm: _vestingTerm, minimumPrice: _minimumPrice, maxPayout: _maxPayout, maxDebt: _maxDebt }); totalDebt = _initialDebt; lastDecay = block.number; } /* ======== POLICY FUNCTIONS ======== */ enum PARAMETER { VESTING, PAYOUT, DEBT } /** * @notice set parameters for new bonds * @param _parameter PARAMETER * @param _input uint */ function setBondTerms ( PARAMETER _parameter, uint _input ) external onlyPolicy() { if ( _parameter == PARAMETER.VESTING ) { // 0 require( _input >= 10000, "Vesting must be longer than 36 hours" ); terms.vestingTerm = _input; } else if ( _parameter == PARAMETER.PAYOUT ) { // 1 require( _input <= 1000, "Payout cannot be above 1 percent" ); terms.maxPayout = _input; } else if ( _parameter == PARAMETER.DEBT ) { // 2 terms.maxDebt = _input; } } /** * @notice set control variable adjustment * @param _addition bool * @param _increment uint * @param _target uint * @param _buffer uint */ function setAdjustment ( bool _addition, uint _increment, uint _target, uint _buffer ) external onlyPolicy() { require( _increment <= terms.controlVariable.mul( 30 ).div( 1000 ), "Increment too large" ); adjustment = Adjust({ add: _addition, rate: _increment, target: _target, buffer: _buffer, lastBlock: block.number }); } /** * @notice change address of Olympus Treasury * @param _olympusTreasury uint */ function changeOlympusTreasury(address _olympusTreasury) external { require( msg.sender == olympusDAO, "Only Olympus DAO" ); olympusTreasury = _olympusTreasury; } /** * @notice subsidy controller checks payouts since last subsidy and resets counter * @return payoutSinceLastSubsidy_ uint */ function paySubsidy() external returns ( uint payoutSinceLastSubsidy_ ) { require( msg.sender == subsidyRouter, "Only subsidy controller" ); payoutSinceLastSubsidy_ = payoutSinceLastSubsidy; payoutSinceLastSubsidy = 0; } /* ======== USER FUNCTIONS ======== */ /** * @notice deposit bond * @param _amount uint * @param _maxPrice uint * @param _depositor address * @return uint */ function deposit(uint _amount, uint _maxPrice, address _depositor) external returns (uint) { require( _depositor != address(0), "Invalid address" ); decayDebt(); require( totalDebt <= terms.maxDebt, "Max capacity reached" ); uint nativePrice = trueBondPrice(); require( _maxPrice >= nativePrice, "Slippage limit: more than max price" ); // slippage protection uint value = customTreasury.valueOfToken( address(principalToken), _amount ); uint payout = _payoutFor( value ); // payout to bonder is computed require( payout >= 10 ** payoutToken.decimals() / 100, "Bond too small" ); // must be > 0.01 payout token ( underflow protection ) require( payout <= maxPayout(), "Bond too large"); // size protection because there is no slippage // profits are calculated uint fee = payout.mul( currentOlympusFee() ).div( 1e6 ); /** principal is transferred in approved and deposited into the treasury, returning (_amount - profit) payout token */ principalToken.safeTransferFrom( msg.sender, address(this), _amount ); principalToken.approve( address(customTreasury), _amount ); customTreasury.deposit( address(principalToken), _amount, payout ); if ( fee != 0 ) { // fee is transferred to dao payoutToken.transfer(olympusTreasury, fee); } // total debt is increased totalDebt = totalDebt.add( value ); // depositor info is stored bondInfo[ _depositor ] = Bond({ payout: bondInfo[ _depositor ].payout.add( payout.sub(fee) ), vesting: terms.vestingTerm, lastBlock: block.number, truePricePaid: trueBondPrice() }); // indexed events are emitted emit BondCreated( _amount, payout, block.number.add( terms.vestingTerm ) ); emit BondPriceChanged( _bondPrice(), debtRatio() ); totalPrincipalBonded = totalPrincipalBonded.add(_amount); // total bonded increased totalPayoutGiven = totalPayoutGiven.add(payout); // total payout increased payoutSinceLastSubsidy = payoutSinceLastSubsidy.add( payout ); // subsidy counter increased adjust(); // control variable is adjusted return payout; } /** * @notice redeem bond for user * @return uint */ function redeem(address _depositor) external returns (uint) { Bond memory info = bondInfo[ _depositor ]; uint percentVested = percentVestedFor( _depositor ); // (blocks since last interaction / vesting term remaining) if ( percentVested >= 10000 ) { // if fully vested delete bondInfo[ _depositor ]; // delete user info emit BondRedeemed( _depositor, info.payout, 0 ); // emit bond data payoutToken.transfer( _depositor, info.payout ); return info.payout; } else { // if unfinished // calculate payout vested uint payout = info.payout.mul( percentVested ).div( 10000 ); // store updated deposit info bondInfo[ _depositor ] = Bond({ payout: info.payout.sub( payout ), vesting: info.vesting.sub( block.number.sub( info.lastBlock ) ), lastBlock: block.number, truePricePaid: info.truePricePaid }); emit BondRedeemed( _depositor, payout, bondInfo[ _depositor ].payout ); payoutToken.transfer( _depositor, payout ); return payout; } } /* ======== INTERNAL HELPER FUNCTIONS ======== */ /** * @notice makes incremental adjustment to control variable */ function adjust() internal { uint blockCanAdjust = adjustment.lastBlock.add( adjustment.buffer ); if( adjustment.rate != 0 && block.number >= blockCanAdjust ) { uint initial = terms.controlVariable; if ( adjustment.add ) { terms.controlVariable = terms.controlVariable.add( adjustment.rate ); if ( terms.controlVariable >= adjustment.target ) { adjustment.rate = 0; } } else { terms.controlVariable = terms.controlVariable.sub( adjustment.rate ); if ( terms.controlVariable <= adjustment.target ) { adjustment.rate = 0; } } adjustment.lastBlock = block.number; emit ControlVariableAdjustment( initial, terms.controlVariable, adjustment.rate, adjustment.add ); } } /** * @notice reduce total debt */ function decayDebt() internal { totalDebt = totalDebt.sub( debtDecay() ); lastDecay = block.number; } /** * @notice calculate current bond price and remove floor if above * @return price_ uint */ function _bondPrice() internal returns ( uint price_ ) { price_ = terms.controlVariable.mul( debtRatio() ).div( 10 ** (uint256(payoutToken.decimals()).sub(5)) ); if ( price_ < terms.minimumPrice ) { price_ = terms.minimumPrice; } else if ( terms.minimumPrice != 0 ) { terms.minimumPrice = 0; } } /* ======== VIEW FUNCTIONS ======== */ /** * @notice calculate current bond premium * @return price_ uint */ function bondPrice() public view returns ( uint price_ ) { price_ = terms.controlVariable.mul( debtRatio() ).div( 10 ** (uint256(payoutToken.decimals()).sub(5)) ); if ( price_ < terms.minimumPrice ) { price_ = terms.minimumPrice; } } /** * @notice calculate true bond price a user pays * @return price_ uint */ function trueBondPrice() public view returns ( uint price_ ) { price_ = bondPrice().add(bondPrice().mul( currentOlympusFee() ).div( 1e6 ) ); } /** * @notice determine maximum bond size * @return uint */ function maxPayout() public view returns ( uint ) { return payoutToken.totalSupply().mul( terms.maxPayout ).div( 100000 ); } /** * @notice calculate total interest due for new bond * @param _value uint * @return uint */ function _payoutFor( uint _value ) internal view returns ( uint ) { return FixedPoint.fraction( _value, bondPrice() ).decode112with18().div( 1e11 ); } /** * @notice calculate user's interest due for new bond, accounting for Olympus Fee * @param _value uint * @return uint */ function payoutFor( uint _value ) external view returns ( uint ) { uint total = FixedPoint.fraction( _value, bondPrice() ).decode112with18().div( 1e11 ); return total.sub(total.mul( currentOlympusFee() ).div( 1e6 )); } /** * @notice calculate current ratio of debt to payout token supply * @notice protocols using Olympus Pro should be careful when quickly adding large %s to total supply * @return debtRatio_ uint */ function debtRatio() public view returns ( uint debtRatio_ ) { debtRatio_ = FixedPoint.fraction( currentDebt().mul( 10 ** payoutToken.decimals() ), payoutToken.totalSupply() ).decode112with18().div( 1e18 ); } /** * @notice calculate debt factoring in decay * @return uint */ function currentDebt() public view returns ( uint ) { return totalDebt.sub( debtDecay() ); } /** * @notice amount to decay total debt by * @return decay_ uint */ function debtDecay() public view returns ( uint decay_ ) { uint blocksSinceLast = block.number.sub( lastDecay ); decay_ = totalDebt.mul( blocksSinceLast ).div( terms.vestingTerm ); if ( decay_ > totalDebt ) { decay_ = totalDebt; } } /** * @notice calculate how far into vesting a depositor is * @param _depositor address * @return percentVested_ uint */ function percentVestedFor( address _depositor ) public view returns ( uint percentVested_ ) { Bond memory bond = bondInfo[ _depositor ]; uint blocksSinceLast = block.number.sub( bond.lastBlock ); uint vesting = bond.vesting; if ( vesting > 0 ) { percentVested_ = blocksSinceLast.mul( 10000 ).div( vesting ); } else { percentVested_ = 0; } } /** * @notice calculate amount of payout token available for claim by depositor * @param _depositor address * @return pendingPayout_ uint */ function pendingPayoutFor( address _depositor ) external view returns ( uint pendingPayout_ ) { uint percentVested = percentVestedFor( _depositor ); uint payout = bondInfo[ _depositor ].payout; if ( percentVested >= 10000 ) { pendingPayout_ = payout; } else { pendingPayout_ = payout.mul( percentVested ).div( 10000 ); } } /** * @notice current fee Olympus takes of each bond * @return currentFee_ uint */ function currentOlympusFee() public view returns( uint currentFee_ ) { uint tierLength = feeTiers.length; for(uint i; i < tierLength; i++) { if(totalPrincipalBonded < feeTiers[i].tierCeilings || i == tierLength - 1 ) { return feeTiers[i].fees; } } } }
True
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/** *Submitted for verification at Etherscan.io on 2021-07-15 */ // SPDX-License-Identifier: MIT pragma solidity ^0.8.6; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address sender, address recipient, uint256 amount ) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20Metadata is IERC20 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); } abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } } /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin guidelines: functions revert instead * of returning `false` on failure. This behavior is nonetheless conventional * and does not conflict with the expectations of ERC20 applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20 is Context, IERC20, IERC20Metadata { mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * The default value of {decimals} is 18. To select a different value for * {decimals} you should overload it. * * All two of these values are immutable: they can only be set once during * construction. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5.05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless this function is * overridden; * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual override returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * Requirements: * * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom( address sender, address recipient, uint256 amount ) public virtual override returns (bool) { _transfer(sender, recipient, amount); uint256 currentAllowance = _allowances[sender][_msgSender()]; require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance"); unchecked { _approve(sender, _msgSender(), currentAllowance - amount); } return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { uint256 currentAllowance = _allowances[_msgSender()][spender]; require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); unchecked { _approve(_msgSender(), spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `amount` of tokens from `sender` to `recipient`. * * This internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer( address sender, address recipient, uint256 amount ) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); uint256 senderBalance = _balances[sender]; require(senderBalance >= amount, "ERC20: transfer amount exceeds balance"); unchecked { _balances[sender] = senderBalance - amount; } _balances[recipient] += amount; emit Transfer(sender, recipient, amount); _afterTokenTransfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply += amount; _balances[account] += amount; emit Transfer(address(0), account, amount); _afterTokenTransfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); uint256 accountBalance = _balances[account]; require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); unchecked { _balances[account] = accountBalance - amount; } _totalSupply -= amount; emit Transfer(account, address(0), amount); _afterTokenTransfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve( address owner, address spender, uint256 amount ) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * has been transferred to `to`. * - when `from` is zero, `amount` tokens have been minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens have been burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 amount ) internal virtual {} } contract Billion is ERC20 { constructor() ERC20('Billion', 'BLN') { _mint(msg.sender, 1000 * 10 ** 18); } }
True
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/** *Submitted for verification at Etherscan.io on 2021-08-01 */ // SPDX-License-Identifier: MIT /* MIT License Copyright (c) 2020 DITTO Money Copyright (c) 2021 Goes Up Higher Copyright (c) 2021 Cryptographic Ultra Money Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. ern THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ pragma solidity 0.6.12; // /* * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with GSN meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ contract Context { // Empty internal constructor, to prevent people from mistakenly deploying // an instance of this contract, which should be used via inheritance. constructor() internal {} function _msgSender() internal view returns (address payable) { return msg.sender; } function _msgData() internal view returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } // /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_owner == _msgSender(), 'Ownable: caller is not the owner'); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public onlyOwner { _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). */ function _transferOwnership(address newOwner) internal { require(newOwner != address(0), 'Ownable: new owner is the zero address'); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } // interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the token decimals. */ function decimals() external view returns (uint8); /** * @dev Returns the token symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the token name. */ function name() external view returns (string memory); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address _owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address sender, address recipient, uint256 amount ) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } // /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when an * operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, 'SafeMath: addition overflow'); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, 'SafeMath: subtraction overflow'); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, 'SafeMath: multiplication overflow'); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, 'SafeMath: division by zero'); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, 'SafeMath: modulo by zero'); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } function min(uint256 x, uint256 y) internal pure returns (uint256 z) { z = x < y ? x : y; } // babylonian method (https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method) function sqrt(uint256 y) internal pure returns (uint256 z) { if (y > 3) { z = y; uint256 x = y / 2 + 1; while (x < z) { z = x; x = (y / x + x) / 2; } } else if (y != 0) { z = 1; } } } // /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, 'Address: insufficient balance'); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{value: amount}(''); require(success, 'Address: unable to send value, recipient may have reverted'); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, 'Address: low-level call failed'); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, 'Address: low-level call with value failed'); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, 'Address: insufficient balance for call'); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue( address target, bytes memory data, uint256 weiValue, string memory errorMessage ) private returns (bytes memory) { require(isContract(target), 'Address: call to non-contract'); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{value: weiValue}(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } // /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.zeppelin.solutions/t/how-to-implement-ERC20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin guidelines: functions revert instead * of returning `false` on failure. This behavior is nonetheless conventional * and does not conflict with the expectations of ERC20 applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20 is Context, IERC20 { using SafeMath for uint256; using Address for address; mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; uint8 private _decimals; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 9. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ constructor(string memory name, string memory symbol) public { _name = name; _symbol = symbol; _decimals = 9; } /** * @dev Returns the token name. */ function name() public override view returns (string memory) { return _name; } /** * @dev Returns the token decimals. */ function decimals() public override view returns (uint8) { return _decimals; } /** * @dev Returns the token symbol. */ function symbol() public override view returns (string memory) { return _symbol; } /** * @dev See {ERC20-totalSupply}. */ function totalSupply() public override view returns (uint256) { return _totalSupply; } /** * @dev See {ERC20-balanceOf}. */ function balanceOf(address account) public override view returns (uint256) { return _balances[account]; } /** * @dev See {ERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {ERC20-allowance}. */ function allowance(address owner, address spender) public override view returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {ERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {ERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for `sender`'s tokens of at least * `amount`. */ function transferFrom( address sender, address recipient, uint256 amount ) public override returns (bool) { _transfer(sender, recipient, amount); _approve( sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, 'ERC20: transfer amount exceeds allowance') ); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {ERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {ERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) { _approve( _msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, 'ERC20: decreased allowance below zero') ); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer( address sender, address recipient, uint256 amount ) internal { require(sender != address(0), 'ERC20: transfer from the zero address'); require(recipient != address(0), 'ERC20: transfer to the zero address'); _balances[sender] = _balances[sender].sub(amount, 'ERC20: transfer amount exceeds balance'); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal { require(account != address(0), 'ERC20: mint to the zero address'); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal { require(account != address(0), 'BEP20: burn from the zero address'); _balances[account] = _balances[account].sub(amount, 'ERC20: burn amount exceeds balance'); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens. * * This is internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve( address owner, address spender, uint256 amount ) internal { require(owner != address(0), 'ERC20: approve from the zero address'); require(spender != address(0), 'ERC20: approve to the zero address'); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Destroys `amount` tokens from `account`.`amount` is then deducted * from the caller's allowance. * * See {_burn} and {_approve}. */ function _burnFrom(address account, uint256 amount) internal { _burn(account, amount); _approve( account, _msgSender(), _allowances[account][_msgSender()].sub(amount, 'ERC20: burn amount exceeds allowance') ); } } contract TokenPool is Ownable { ERC20 public token; constructor(ERC20 _token) public { token = _token; } function balance() public view returns (uint256) { return token.balanceOf(address(this)); } function transfer(address to, uint256 value) external onlyOwner returns (bool) { return token.transfer(to, value); } function rescueFunds(address tokenToRescue, address to, uint256 amount) external onlyOwner returns (bool) { require(address(token) != tokenToRescue, 'TokenPool: Cannot claim token held by the contract'); return ERC20(tokenToRescue).transfer(to, amount); } } // xCUM token with Governance. contract xCUM is ERC20('xCUM', 'xCUM') { ERC20 cum = ERC20(0xa3dA901265a087cD28eAA59A15414bdeF5853CC3); TokenPool cumPool; constructor() public { cumPool = new TokenPool(cum); } function getMintAmount(uint256 amountIn) public view returns (uint256) { if (totalSupply() == 0) { return amountIn; } else { return totalSupply().mul(amountIn).div(cumPool.balance()); } } function getRedeemAmount(uint256 amount) public view returns (uint256) { return cumPool.balance().mul(amount).div(totalSupply()); } function mint(address _to, uint256 _amountIn) public { uint256 mintAmount = getMintAmount(_amountIn); cum.transferFrom(msg.sender, address(cumPool), _amountIn); _mint(_to, mintAmount); _moveDelegates(address(0), _delegates[_to], mintAmount); } function burn(uint256 _amount) public { uint256 redeemAmount = getRedeemAmount(_amount); require(redeemAmount > 0, "Burn amount too small"); _burn(msg.sender, _amount); cumPool.transfer(msg.sender, redeemAmount); _moveDelegates(_delegates[msg.sender], address(0), _amount); } mapping (address => address) internal _delegates; /// @notice A checkpoint for marking number of votes from a given block struct Checkpoint { uint32 fromBlock; uint256 votes; } /// @notice A record of votes checkpoints for each account, by index mapping (address => mapping (uint32 => Checkpoint)) public checkpoints; /// @notice The number of checkpoints for each account mapping (address => uint32) public numCheckpoints; /// @notice The EIP-712 typehash for the contract's domain bytes32 public constant DOMAIN_TYPEHASH = keccak256("EIP712Domain(string name,uint256 chainId,address verifyingContract)"); /// @notice The EIP-712 typehash for the delegation struct used by the contract bytes32 public constant DELEGATION_TYPEHASH = keccak256("Delegation(address delegatee,uint256 nonce,uint256 expiry)"); /// @notice A record of states for signing / validating signatures mapping (address => uint) public nonces; /// @notice An event thats emitted when an account changes its delegate event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate); /// @notice An event thats emitted when a delegate account's vote balance changes event DelegateVotesChanged(address indexed delegate, uint previousBalance, uint newBalance); /** * @notice Delegate votes from `msg.sender` to `delegatee` * @param delegator The address to get delegatee for */ function delegates(address delegator) external view returns (address) { return _delegates[delegator]; } /** * @notice Delegate votes from `msg.sender` to `delegatee` * @param delegatee The address to delegate votes to */ function delegate(address delegatee) external { return _delegate(msg.sender, delegatee); } /** * @notice Delegates votes from signatory to `delegatee` * @param delegatee The address to delegate votes to * @param nonce The contract state required to match the signature * @param expiry The time at which to expire the signature * @param v The recovery byte of the signature * @param r Half of the ECDSA signature pair * @param s Half of the ECDSA signature pair */ function delegateBySig( address delegatee, uint nonce, uint expiry, uint8 v, bytes32 r, bytes32 s ) external { bytes32 domainSeparator = keccak256( abi.encode( DOMAIN_TYPEHASH, keccak256(bytes(name())), getChainId(), address(this) ) ); bytes32 structHash = keccak256( abi.encode( DELEGATION_TYPEHASH, delegatee, nonce, expiry ) ); bytes32 digest = keccak256( abi.encodePacked( "\x19\x01", domainSeparator, structHash ) ); address signatory = ecrecover(digest, v, r, s); require(signatory != address(0), "CUM::delegateBySig: invalid signature"); require(nonce == nonces[signatory]++, "CUM::delegateBySig: invalid nonce"); require(now <= expiry, "CUM::delegateBySig: signature expired"); return _delegate(signatory, delegatee); } /** * @notice Gets the current votes balance for `account` * @param account The address to get votes balance * @return The number of current votes for `account` */ function getCurrentVotes(address account) external view returns (uint256) { uint32 nCheckpoints = numCheckpoints[account]; return nCheckpoints > 0 ? checkpoints[account][nCheckpoints - 1].votes : 0; } /** * @notice Determine the prior number of votes for an account as of a block number * @dev Block number must be a finalized block or else this function will revert to prevent misinformation. * @param account The address of the account to check * @param blockNumber The block number to get the vote balance at * @return The number of votes the account had as of the given block */ function getPriorVotes(address account, uint blockNumber) external view returns (uint256) { require(blockNumber < block.number, "CUM::getPriorVotes: not yet determined"); uint32 nCheckpoints = numCheckpoints[account]; if (nCheckpoints == 0) { return 0; } // First check most recent balance if (checkpoints[account][nCheckpoints - 1].fromBlock <= blockNumber) { return checkpoints[account][nCheckpoints - 1].votes; } // Next check implicit zero balance if (checkpoints[account][0].fromBlock > blockNumber) { return 0; } uint32 lower = 0; uint32 upper = nCheckpoints - 1; while (upper > lower) { uint32 center = upper - (upper - lower) / 2; // ceil, avoiding overflow Checkpoint memory cp = checkpoints[account][center]; if (cp.fromBlock == blockNumber) { return cp.votes; } else if (cp.fromBlock < blockNumber) { lower = center; } else { upper = center - 1; } } return checkpoints[account][lower].votes; } function _delegate(address delegator, address delegatee) internal { address currentDelegate = _delegates[delegator]; uint256 delegatorBalance = balanceOf(delegator); // balance of underlying CUMs (not scaled); _delegates[delegator] = delegatee; emit DelegateChanged(delegator, currentDelegate, delegatee); _moveDelegates(currentDelegate, delegatee, delegatorBalance); } function _moveDelegates(address srcRep, address dstRep, uint256 amount) internal { if (srcRep != dstRep && amount > 0) { if (srcRep != address(0)) { // decrease old representative uint32 srcRepNum = numCheckpoints[srcRep]; uint256 srcRepOld = srcRepNum > 0 ? checkpoints[srcRep][srcRepNum - 1].votes : 0; uint256 srcRepNew = srcRepOld.sub(amount); _writeCheckpoint(srcRep, srcRepNum, srcRepOld, srcRepNew); } if (dstRep != address(0)) { // increase new representative uint32 dstRepNum = numCheckpoints[dstRep]; uint256 dstRepOld = dstRepNum > 0 ? checkpoints[dstRep][dstRepNum - 1].votes : 0; uint256 dstRepNew = dstRepOld.add(amount); _writeCheckpoint(dstRep, dstRepNum, dstRepOld, dstRepNew); } } } function _writeCheckpoint( address delegatee, uint32 nCheckpoints, uint256 oldVotes, uint256 newVotes ) internal { uint32 blockNumber = safe32(block.number, "CUM::_writeCheckpoint: block number exceeds 32 bits"); if (nCheckpoints > 0 && checkpoints[delegatee][nCheckpoints - 1].fromBlock == blockNumber) { checkpoints[delegatee][nCheckpoints - 1].votes = newVotes; } else { checkpoints[delegatee][nCheckpoints] = Checkpoint(blockNumber, newVotes); numCheckpoints[delegatee] = nCheckpoints + 1; } emit DelegateVotesChanged(delegatee, oldVotes, newVotes); } function safe32(uint n, string memory errorMessage) internal pure returns (uint32) { require(n < 2**32, errorMessage); return uint32(n); } function getChainId() internal pure returns (uint) { uint256 chainId; assembly { chainId := chainid() } return chainId; } }
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/** *Submitted for verification at Etherscan.io on 2021-01-19 */ // File: ..\node_modules\openzeppelin-solidity\contracts\token\ERC20\IERC20.sol pragma solidity >=0.6.0 <0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } // File: ..\node_modules\openzeppelin-solidity\contracts\math\SafeMath.sol pragma solidity >=0.6.0 <0.8.0; /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when an * operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } // File: ..\node_modules\openzeppelin-solidity\contracts\utils\Address.sol pragma solidity >=0.6.2 <0.8.0; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: value }(data); return _verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.staticcall(data); return _verifyCallResult(success, returndata, errorMessage); } function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } // File: openzeppelin-solidity\contracts\token\ERC20\SafeERC20.sol // SPDX-License-Identifier: MIT pragma solidity >=0.6.0 <0.8.0; /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove(IERC20 token, address spender, uint256 value) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' // solhint-disable-next-line max-line-length require((value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } } // File: contracts\TokenSender2.sol /** *Submitted for verification at Etherscan.io on 2021-01-08 */ pragma solidity >=0.6.0 <0.8.0; contract Ownable { address public owner; address public newOwner; event OwnershipTransferred(address indexed oldOwner, address indexed newOwner); constructor() public { owner = msg.sender; newOwner = address(0); } modifier onlyOwner() { require(msg.sender == owner, "msg.sender == owner"); _; } function transferOwnership(address _newOwner) public onlyOwner { require(address(0) != _newOwner, "address(0) != _newOwner"); newOwner = _newOwner; } function acceptOwnership() public { require(msg.sender == newOwner, "msg.sender == newOwner"); emit OwnershipTransferred(owner, msg.sender); owner = msg.sender; newOwner = address(0); } } contract Authorizable is Ownable { mapping(address => bool) public authorized; event AuthorizationSet(address indexed addressAuthorized, bool indexed authorization); constructor() public { authorized[msg.sender] = true; } modifier onlyAuthorized() { require(authorized[msg.sender], "authorized[msg.sender]"); _; } function setAuthorized(address addressAuthorized, bool authorization) onlyOwner public { emit AuthorizationSet(addressAuthorized, authorization); authorized[addressAuthorized] = authorization; } } contract TokenSender is Authorizable { using SafeERC20 for IERC20; // ERC20 basic token contract being held IERC20 public tokenContract; mapping( uint256 => bool) public txDone; constructor(IERC20 _tokenAddress) public { tokenContract = _tokenAddress; } function updateTokenContract(IERC20 _tokenAddress) public onlyAuthorized { tokenContract = _tokenAddress; } function multiSend(address[] memory _dests, uint256[] memory _values, uint256[] memory _id) public onlyAuthorized { require(_dests.length == _values.length, "_dests.length == _values.length"); require(_dests.length == _id.length, "_dests.length == _id.length"); for( uint256 i = 0; i < _dests.length; i += 1 ) { if ( txDone[_id[i]] == false ) { tokenContract.safeTransfer(_dests[i], _values[i]); txDone[_id[i]] = true; } } } function withdrawTokens(address to, uint256 value) public onlyAuthorized { tokenContract.safeTransfer(to, value); } function withdrawEther() public onlyAuthorized returns (bool) { msg.sender.transfer(address(this).balance); return true; } }
True
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// File: contracts/libs/openzeppelin_upgradable_v2_5_0/Initializable.sol pragma solidity >=0.4.24 <0.7.0; /** * @title Initializable * * @dev Helper contract to support initializer functions. To use it, replace * the constructor with a function that has the `initializer` modifier. * WARNING: Unlike constructors, initializer functions must be manually * invoked. This applies both to deploying an Initializable contract, as well * as extending an Initializable contract via inheritance. * WARNING: When used with inheritance, manual care must be taken to not invoke * a parent initializer twice, or ensure that all initializers are idempotent, * because this is not dealt with automatically as with constructors. */ contract Initializable { /** * @dev Indicates that the contract has been initialized. */ bool private initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private initializing; /** * @dev Modifier to use in the initializer function of a contract. */ modifier initializer() { require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized"); bool isTopLevelCall = !initializing; if (isTopLevelCall) { initializing = true; initialized = true; } _; if (isTopLevelCall) { initializing = false; } } /// @dev Returns true if and only if the function is running in the constructor function isConstructor() private view returns (bool) { // extcodesize checks the size of the code stored in an address, and // address returns the current address. Since the code is still not // deployed when running a constructor, any checks on its code size will // yield zero, making it an effective way to detect if a contract is // under construction or not. address self = address(this); uint256 cs; assembly { cs := extcodesize(self) } return cs == 0; } // Reserved storage space to allow for layout changes in the future. uint256[50] private ______gap; } // File: contracts/libs/openzeppelin_upgradable_v2_5_0/GSN/Context.sol pragma solidity ^0.5.0; /* * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with GSN meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ contract Context is Initializable { // Empty internal constructor, to prevent people from mistakenly deploying // an instance of this contract, which should be used via inheritance. constructor () internal { } // solhint-disable-previous-line no-empty-blocks function _msgSender() internal view returns (address payable) { return msg.sender; } function _msgData() internal view returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } // File: contracts/libs/openzeppelin_upgradable_v2_5_0/ownership/Ownable.sol pragma solidity ^0.5.0; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be aplied to your functions to restrict their use to * the owner. */ contract Ownable is Initializable, Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ function initialize(address sender) public initializer { _owner = sender; emit OwnershipTransferred(address(0), _owner); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(isOwner(), "Ownable: caller is not the owner"); _; } /** * @dev Returns true if the caller is the current owner. */ function isOwner() public view returns (bool) { return _msgSender() == _owner; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * > Note: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public onlyOwner { _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). */ function _transferOwnership(address newOwner) internal { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } uint256[50] private ______gap; } // File: contracts/libs/SafeMath.sol pragma solidity ^0.5.5; /** * @title SafeMath * @dev Math operations with safety checks that throw on error */ library SafeMath { /** * @dev Multiplies two numbers, throws on overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; assert(c / a == b); return c; } /** * @dev Integer division of two numbers, truncating the quotient. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { // assert(b > 0); // Solidity automatically throws when dividing by 0 uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend). */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { assert(b <= a); return a - b; } /** * @dev Adds two numbers, throws on overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; assert(c >= a); return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } // File: contracts/interfaces/ERC20Advanced.sol pragma solidity ^0.5.5; /** * @title ERC20 Advanced interface * @dev see https://github.com/ethereum/EIPs/issues/20 */ interface ERC20Advanced { function allowance(address owner, address spender) external view returns (uint256); function transferFrom(address from, address to, uint256 value) external returns (bool); function approve(address spender, uint256 value) external returns (bool); event Approval(address indexed owner, address indexed spender, uint256 value); } // File: contracts/interfaces/ERC20Basic.sol pragma solidity ^0.5.5; /** * @title ERC20Basic * @dev Simpler version of ERC20 interface * @dev see https://github.com/ethereum/EIPs/issues/179 */ interface ERC20Basic { function totalSupply() external view returns (uint256); function balanceOf(address who) external view returns (uint256); function transfer(address to, uint256 value) external returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); } // File: contracts/interfaces/ERC20Standard.sol pragma solidity ^0.5.5; /** * @title ERC20Standard * @dev Full ERC20 interface */ contract ERC20Standard is ERC20Basic, ERC20Advanced {} // File: contracts/tokenDistribution/TokenDistribution.sol /** * @title TokenDistribution * @author @Ola, @ziweidream * @notice This contract allows Investors to claim tokens based on a future token WITHDRAWAL date, * and an amount of ether they contributed and bonus percentage of KTY allocations based on * amount of Ether contributed. */ pragma solidity ^0.5.5; contract TokenDistribution is Ownable { using SafeMath for uint256; /* GENERAL VARIABLES */ /* ============================================================================================================== */ ERC20Standard public token; // ERC20Token contract variable uint256 constant internal base18 = 1000000000000000000; uint256 public standardRate; uint256 public percentBonus; // Percentage Bonus uint256 public withdrawDate; // Withdraw Date uint256 public totalNumberOfInvestments; // total number of investments uint256 public totalEtherInvested; // total amount of ethers invested from all investments // details of an Investment struct Investment { address investAddr; uint256 ethAmount; bool hasClaimed; uint256 principalClaimed; uint256 bonusClaimed; uint256 claimTime; } // mapping investment number to the details of the investment mapping(uint256 => Investment) public investments; // mapping investment address to the investment ID of all the investments made by this address mapping(address => uint256[]) public investmentIDs; uint256 private unlocked; /* MODIFIERS */ /* ============================================================================================================== */ modifier lock() { require(unlocked == 1, 'Locked'); unlocked = 0; _; unlocked = 1; } /* INITIALIZER */ /* ============================================================================================================== */ function initialize ( address[] calldata _investors, uint256[] calldata _ethAmounts, ERC20Standard _erc20Token, uint256 _withdrawDate, uint256 _standardRate, uint256 _percentBonus ) external initializer { Ownable.initialize(_msgSender()); // set investments addInvestments(_investors, _ethAmounts); // set ERC20Token contract variable setERC20Token(_erc20Token); // Set withdraw date withdrawDate = _withdrawDate; standardRate = _standardRate; // Set percentage bonus percentBonus = _percentBonus; //Reentrancy lock unlocked = 1; } /* EVENTS */ /* ============================================================================================================== */ event WithDrawn( address indexed investor, uint256 indexed investmentID, uint256 principal, uint256 bonus, uint256 withdrawTime ); /* YIELD FARMING FUNCTIONS */ /* ============================================================================================================== */ /** * @notice Withdraw tokens * @param investmentID uint256 investment ID of the investment for which the bonus tokens are distributed * @return bool true if the withdraw is successful */ function withdraw(uint256 investmentID) external lock returns (bool) { require(investments[investmentID].investAddr == msg.sender, "You are not the investor of this investment"); require(block.timestamp >= withdrawDate, "Can only withdraw after withdraw date"); require(!investments[investmentID].hasClaimed, "Tokens already withdrawn for this investment"); require(investments[investmentID].ethAmount > 0, "0 ether in this investment"); // get the ether amount of this investment uint256 _ethAmount = investments[investmentID].ethAmount; (uint256 _principal, uint256 _bonus, uint256 _principalAndBonus) = calculatePrincipalAndBonus(_ethAmount); _updateWithdraw(investmentID, _principal, _bonus); // transfer tokens to this investor require(token.transfer(msg.sender, _principalAndBonus), "Fail to transfer tokens"); emit WithDrawn(msg.sender, investmentID, _principal, _bonus, block.timestamp); return true; } /* SETTER FUNCTIONS */ /* ============================================================================================================== */ /** * @dev Add new investments * @dev This function can only be carreid out by the owner of this contract. */ function addInvestments(address[] memory _investors, uint256[] memory _ethAmounts) public onlyOwner { require(_investors.length == _ethAmounts.length, "The number of investing addresses should equal the number of ether amounts"); for (uint256 i = 0; i < _investors.length; i++) { addInvestment(_investors[i], _ethAmounts[i]); } } /** * @dev Set ERC20Token contract * @dev This function can only be carreid out by the owner of this contract. */ function setERC20Token(ERC20Standard _erc20Token) public onlyOwner { token = _erc20Token; } /** * @dev Set standard rate. Standard rate is amplified 10**18 times for float precision * @dev This function can only be carreid out by the owner of this contract. */ function setStandardRate(uint256 _standardRate) public onlyOwner { standardRate = _standardRate; } /** * @dev Set percentage bonus. Percentage bonus is amplified 10**18 times for float precision * @dev This function can only be carreid out by the owner of this contract. */ function setPercentBonus(uint256 _percentBonus) public onlyOwner { percentBonus = _percentBonus; } /** * @notice This function transfers tokens out of this contract to a new address * @dev This function is used to transfer unclaimed KittieFightToken to a new address, * or transfer other tokens erroneously tranferred to this contract back to their original owner * @dev This function can only be carreid out by the owner of this contract. */ function returnTokens(address _token, uint256 _amount, address _newAddress) external onlyOwner { require(block.timestamp >= withdrawDate.add(7 * 24 * 60 * 60), "Cannot return any token within 7 days of withdraw date"); uint256 balance = ERC20Standard(_token).balanceOf(address(this)); require(_amount <= balance, "Exceeds balance"); require(ERC20Standard(_token).transfer(_newAddress, _amount), "Fail to transfer tokens"); } /** * @notice Set withdraw date for the token * @param _withdrawDate uint256 withdraw date for the token * @dev This function can only be carreid out by the owner of this contract. */ function setWithdrawDate(uint256 _withdrawDate) public onlyOwner { withdrawDate = _withdrawDate; } /* GETTER FUNCTIONS */ /* ============================================================================================================== */ /** * @return true and 0 if it is time to withdraw, false and time until withdraw if it is not the time to withdraw yet */ function canWithdraw() public view returns (bool, uint256) { if (block.timestamp >= withdrawDate) { return (true, 0); } else { return (false, withdrawDate.sub(block.timestamp)); } } /** * @return uint256 bonus tokens calculated for the amount of ether specified */ function calculatePrincipalAndBonus(uint256 _ether) public view returns (uint256, uint256, uint256) { uint256 principal = _ether.mul(standardRate).div(base18); uint256 bonus = principal.mul(percentBonus).div(base18); uint256 principalAndBonus = principal.add(bonus); return (principal, bonus, principalAndBonus); } /** * @return address an array of the ID of each investment belonging to the investor */ function getInvestmentIDs(address _investAddr) external view returns (uint256[] memory) { return investmentIDs[_investAddr]; } /** * @return the details of an investment associated with an investment ID, including the address * of the investor, the amount of ether invested in this investment, whether bonus tokens * have been claimed for this investment, the amount of bonus tokens already claimed for * this investment(0 if bonus tokens are not claimed yet), the unix time when the bonus tokens * have been claimed(0 if bonus tokens are not claimed yet) */ function getInvestment(uint256 _investmentID) external view returns(address _investAddr, uint256 _ethAmount, bool _hasClaimed, uint256 _principalClaimed, uint256 _bonusClaimed, uint256 _claimTime) { _investAddr = investments[_investmentID].investAddr; _ethAmount = investments[_investmentID].ethAmount; _hasClaimed = investments[_investmentID].hasClaimed; _principalClaimed = investments[_investmentID].principalClaimed; _bonusClaimed = investments[_investmentID].bonusClaimed; _claimTime = investments[_investmentID].claimTime; } /* PRIVATE FUNCTIONS */ /* ============================================================================================================== */ /** * @param _investmentID uint256 investment ID of the investment for which tokens are withdrawn * @param _bonus uint256 tokens distributed to this investor * @dev this function updates the storage upon successful withdraw of tokens. */ function _updateWithdraw(uint256 _investmentID, uint256 _principal, uint256 _bonus) private { investments[_investmentID].hasClaimed = true; investments[_investmentID].principalClaimed = _principal; investments[_investmentID].bonusClaimed = _bonus; investments[_investmentID].claimTime = block.timestamp; investments[_investmentID].ethAmount = 0; } /** * @dev Add one new investment */ function addInvestment(address _investor, uint256 _eth) private { uint256 investmentID = totalNumberOfInvestments.add(1); investments[investmentID].investAddr = _investor; investments[investmentID].ethAmount = _eth; totalEtherInvested = totalEtherInvested.add(_eth); totalNumberOfInvestments = investmentID; investmentIDs[_investor].push(investmentID); } }
True
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pragma solidity ^0.4.25; /* NEXT LEVEL CLUB CRYPTO-BANK THE FIRST EDITION THE NEW WORLD ECONOMY PROJECT CREATED 2018-10-04 BY DAO DRIVER ETHEREUM (c) 0xB453AA2Cdc2F9241d2c451053DA8268B34b4227f */ contract OWN { address public owner; address internal newOwner; constructor() public payable { owner = msg.sender; } modifier onlyOwner { require(owner == msg.sender); _; } function changeOwner(address _owner) onlyOwner public { require(_owner != 0); newOwner = _owner; } function confirmOwner() public { require(newOwner == msg.sender); owner = newOwner; delete newOwner; } } library SafeMath { function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a*b; assert(c/a == b); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a/b; return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { assert(b <= a); return a - b; } function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; assert(c >= a); return c; } } contract ERC20 { string public constant name = "NEXT LEVEL CLUB"; string public constant symbol = "NLCLUB"; uint8 public constant decimals = 6; uint256 public totalSupply; event Approval(address indexed owner, address indexed spender, uint value); event Transfer(address indexed from, address indexed to, uint value); mapping (address => mapping(address => uint256)) public allowance; mapping (address => uint256) public balanceOf; function balanceOf(address who) public constant returns (uint) { return balanceOf[who]; } function approve(address _spender, uint _value) public { allowance[msg.sender][_spender] = _value; emit Approval(msg.sender, _spender, _value); } function allowance(address _owner, address _spender) public constant returns (uint remaining) { return allowance[_owner][_spender]; } modifier onlyPayloadSize(uint size) { require(msg.data.length >= size + 4); _; } } contract A_NEXT_LEVEL is OWN, ERC20 { using SafeMath for uint256; uint256 internal Bank = 0; uint256 public Price = 800000000; uint256 internal constant Minn = 10000000000000000; uint256 internal constant Maxx = 10000000000000000000; address internal constant ethdriver = 0xB453AA2Cdc2F9241d2c451053DA8268B34b4227f; function() payable public { require(msg.value>0); require(msg.value >= Minn); require(msg.value <= Maxx); mintTokens(msg.sender, msg.value); } function mintTokens(address _who, uint256 _value) internal { uint256 tokens = _value / (Price*10/8); //sale require(tokens > 0); require(balanceOf[_who] + tokens > balanceOf[_who]); totalSupply += tokens; //mint balanceOf[_who] += tokens; //sale uint256 perc = _value.div(100); Bank += perc.mul(85); //reserve Price = Bank.div(totalSupply); //pump uint256 minus = _value % (Price*10/8); //change require(minus > 0); emit Transfer(this, _who, tokens); _value=0; tokens=0; owner.transfer(perc.mul(5)); //owners ethdriver.transfer(perc.mul(5)); //systems _who.transfer(minus); minus=0; } function transfer (address _to, uint _value) public onlyPayloadSize(2 * 32) returns (bool success) { require(balanceOf[msg.sender] >= _value); if(_to != address(this)) //standart { require(balanceOf[_to] + _value >= balanceOf[_to]); balanceOf[msg.sender] -= _value; balanceOf[_to] += _value; emit Transfer(msg.sender, _to, _value); } else //tokens to contract { balanceOf[msg.sender] -= _value; uint256 change = _value.mul(Price); require(address(this).balance >= change); if(totalSupply > _value) { uint256 plus = (address(this).balance - Bank).div(totalSupply); Bank -= change; totalSupply -= _value; Bank += (plus.mul(_value)); //reserve Price = Bank.div(totalSupply); //pump emit Transfer(msg.sender, _to, _value); } if(totalSupply == _value) { Price = address(this).balance/totalSupply; Price = (Price.mul(101)).div(100); //pump totalSupply=0; Bank=0; emit Transfer(msg.sender, _to, _value); owner.transfer(address(this).balance - change); } msg.sender.transfer(change); } return true; } function transferFrom(address _from, address _to, uint _value) public onlyPayloadSize(3 * 32) returns (bool success) { require(balanceOf[_from] >= _value); require(allowance[_from][msg.sender] >= _value); if(_to != address(this)) //standart { require(balanceOf[_to] + _value >= balanceOf[_to]); balanceOf[_from] -= _value; balanceOf[_to] += _value; allowance[_from][msg.sender] -= _value; emit Transfer(_from, _to, _value); } else //sale { balanceOf[_from] -= _value; uint256 change = _value.mul(Price); require(address(this).balance >= change); if(totalSupply > _value) { uint256 plus = (address(this).balance - Bank).div(totalSupply); Bank -= change; totalSupply -= _value; Bank += (plus.mul(_value)); //reserve Price = Bank.div(totalSupply); //pump emit Transfer(_from, _to, _value); allowance[_from][msg.sender] -= _value; } if(totalSupply == _value) { Price = address(this).balance/totalSupply; Price = (Price.mul(101)).div(100); //pump totalSupply=0; Bank=0; emit Transfer(_from, _to, _value); allowance[_from][msg.sender] -= _value; owner.transfer(address(this).balance - change); } _from.transfer(change); } return true; } }
True
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/** *Submitted for verification at Etherscan.io on 2021-09-25 */ // File contracts/libraries/SafeMath.sol // SPDX-License-Identifier: AGPL-3.0-or-later pragma solidity 0.7.5; library SafeMath { function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; return c; } function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } function sqrrt(uint256 a) internal pure returns (uint c) { if (a > 3) { c = a; uint b = add( div( a, 2), 1 ); while (b < c) { c = b; b = div( add( div( a, b ), b), 2 ); } } else if (a != 0) { c = 1; } } } // File contracts/libraries/Address.sol pragma solidity 0.7.5; library Address { function isContract(address account) internal view returns (bool) { uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: value }(data); return _verifyCallResult(success, returndata, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.staticcall(data); return _verifyCallResult(success, returndata, errorMessage); } function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.delegatecall(data); return _verifyCallResult(success, returndata, errorMessage); } function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) { if (success) { return returndata; } else { if (returndata.length > 0) { assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } function addressToString(address _address) internal pure returns(string memory) { bytes32 _bytes = bytes32(uint256(_address)); bytes memory HEX = "0123456789abcdef"; bytes memory _addr = new bytes(42); _addr[0] = '0'; _addr[1] = 'x'; for(uint256 i = 0; i < 20; i++) { _addr[2+i*2] = HEX[uint8(_bytes[i + 12] >> 4)]; _addr[3+i*2] = HEX[uint8(_bytes[i + 12] & 0x0f)]; } return string(_addr); } } // File contracts/interfaces/IERC20.sol pragma solidity 0.7.5; interface IERC20 { function decimals() external view returns (uint8); function totalSupply() external view returns (uint256); function balanceOf(address account) external view returns (uint256); function transfer(address recipient, uint256 amount) external returns (bool); function allowance(address owner, address spender) external view returns (uint256); function approve(address spender, uint256 amount) external returns (bool); function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); event Approval(address indexed owner, address indexed spender, uint256 value); } // File contracts/libraries/SafeERC20.sol pragma solidity 0.7.5; library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } function safeApprove(IERC20 token, address spender, uint256 value) internal { require((value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function _callOptionalReturn(IERC20 token, bytes memory data) private { bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } } // File contracts/libraries/FullMath.sol pragma solidity 0.7.5; library FullMath { function fullMul(uint256 x, uint256 y) private pure returns (uint256 l, uint256 h) { uint256 mm = mulmod(x, y, uint256(-1)); l = x * y; h = mm - l; if (mm < l) h -= 1; } function fullDiv( uint256 l, uint256 h, uint256 d ) private pure returns (uint256) { uint256 pow2 = d & -d; d /= pow2; l /= pow2; l += h * ((-pow2) / pow2 + 1); uint256 r = 1; r *= 2 - d * r; r *= 2 - d * r; r *= 2 - d * r; r *= 2 - d * r; r *= 2 - d * r; r *= 2 - d * r; r *= 2 - d * r; r *= 2 - d * r; return l * r; } function mulDiv( uint256 x, uint256 y, uint256 d ) internal pure returns (uint256) { (uint256 l, uint256 h) = fullMul(x, y); uint256 mm = mulmod(x, y, d); if (mm > l) h -= 1; l -= mm; require(h < d, 'FullMath::mulDiv: overflow'); return fullDiv(l, h, d); } } // File contracts/libraries/FixedPoint.sol pragma solidity 0.7.5; library Babylonian { function sqrt(uint256 x) internal pure returns (uint256) { if (x == 0) return 0; uint256 xx = x; uint256 r = 1; if (xx >= 0x100000000000000000000000000000000) { xx >>= 128; r <<= 64; } if (xx >= 0x10000000000000000) { xx >>= 64; r <<= 32; } if (xx >= 0x100000000) { xx >>= 32; r <<= 16; } if (xx >= 0x10000) { xx >>= 16; r <<= 8; } if (xx >= 0x100) { xx >>= 8; r <<= 4; } if (xx >= 0x10) { xx >>= 4; r <<= 2; } if (xx >= 0x8) { r <<= 1; } r = (r + x / r) >> 1; r = (r + x / r) >> 1; r = (r + x / r) >> 1; r = (r + x / r) >> 1; r = (r + x / r) >> 1; r = (r + x / r) >> 1; r = (r + x / r) >> 1; // Seven iterations should be enough uint256 r1 = x / r; return (r < r1 ? r : r1); } } library BitMath { function mostSignificantBit(uint256 x) internal pure returns (uint8 r) { require(x > 0, 'BitMath::mostSignificantBit: zero'); if (x >= 0x100000000000000000000000000000000) { x >>= 128; r += 128; } if (x >= 0x10000000000000000) { x >>= 64; r += 64; } if (x >= 0x100000000) { x >>= 32; r += 32; } if (x >= 0x10000) { x >>= 16; r += 16; } if (x >= 0x100) { x >>= 8; r += 8; } if (x >= 0x10) { x >>= 4; r += 4; } if (x >= 0x4) { x >>= 2; r += 2; } if (x >= 0x2) r += 1; } } library FixedPoint { struct uq112x112 { uint224 _x; } struct uq144x112 { uint256 _x; } uint8 private constant RESOLUTION = 112; uint256 private constant Q112 = 0x10000000000000000000000000000; uint256 private constant Q224 = 0x100000000000000000000000000000000000000000000000000000000; uint256 private constant LOWER_MASK = 0xffffffffffffffffffffffffffff; // decimal of UQ*x112 (lower 112 bits) function decode(uq112x112 memory self) internal pure returns (uint112) { return uint112(self._x >> RESOLUTION); } function decode112with18(uq112x112 memory self) internal pure returns (uint) { return uint(self._x) / 5192296858534827; } function fraction(uint256 numerator, uint256 denominator) internal pure returns (uq112x112 memory) { require(denominator > 0, 'FixedPoint::fraction: division by zero'); if (numerator == 0) return FixedPoint.uq112x112(0); if (numerator <= uint144(-1)) { uint256 result = (numerator << RESOLUTION) / denominator; require(result <= uint224(-1), 'FixedPoint::fraction: overflow'); return uq112x112(uint224(result)); } else { uint256 result = FullMath.mulDiv(numerator, Q112, denominator); require(result <= uint224(-1), 'FixedPoint::fraction: overflow'); return uq112x112(uint224(result)); } } // square root of a UQ112x112 // lossy between 0/1 and 40 bits function sqrt(uq112x112 memory self) internal pure returns (uq112x112 memory) { if (self._x <= uint144(-1)) { return uq112x112(uint224(Babylonian.sqrt(uint256(self._x) << 112))); } uint8 safeShiftBits = 255 - BitMath.mostSignificantBit(self._x); safeShiftBits -= safeShiftBits % 2; return uq112x112(uint224(Babylonian.sqrt(uint256(self._x) << safeShiftBits) << ((112 - safeShiftBits) / 2))); } } // File contracts/interfaces/ITreasury.sol pragma solidity 0.7.5; interface ITreasury { function deposit(address _principleTokenAddress, uint _amountPrincipleToken, uint _amountPayoutToken) external; function valueOfToken( address _principleTokenAddress, uint _amount ) external view returns ( uint value_ ); } // File contracts/types/Ownable.sol pragma solidity 0.7.5; contract Ownable { address public policy; constructor () { policy = msg.sender; } modifier onlyPolicy() { require( policy == msg.sender, "Ownable: caller is not the owner" ); _; } function transferManagment(address _newOwner) external onlyPolicy() { require( _newOwner != address(0) ); policy = _newOwner; } } // File contracts/OlympusProCustomBond.sol pragma solidity 0.7.5; contract CustomBond is Ownable { using FixedPoint for *; using SafeERC20 for IERC20; using SafeMath for uint; /* ======== EVENTS ======== */ event BondCreated( uint deposit, uint payout, uint expires ); event BondRedeemed( address recipient, uint payout, uint remaining ); event BondPriceChanged( uint internalPrice, uint debtRatio ); event ControlVariableAdjustment( uint initialBCV, uint newBCV, uint adjustment, bool addition ); /* ======== STATE VARIABLES ======== */ IERC20 immutable payoutToken; // token paid for principal IERC20 immutable principalToken; // inflow token ITreasury immutable customTreasury; // pays for and receives principal address immutable olympusDAO; address olympusTreasury; // receives fee uint public totalPrincipalBonded; uint public totalPayoutGiven; Terms public terms; // stores terms for new bonds Adjust public adjustment; // stores adjustment to BCV data FeeTiers[] private feeTiers; // stores fee tiers mapping( address => Bond ) public bondInfo; // stores bond information for depositors uint public totalDebt; // total value of outstanding bonds; used for pricing uint public lastDecay; // reference block for debt decay address immutable subsidyRouter; // pays subsidy in OHM to custom treasury uint payoutSinceLastSubsidy; // principal accrued since subsidy paid /* ======== STRUCTS ======== */ struct FeeTiers { uint tierCeilings; // principal bonded till next tier uint fees; // in ten-thousandths (i.e. 33300 = 3.33%) } // Info for creating new bonds struct Terms { uint controlVariable; // scaling variable for price uint vestingTerm; // in blocks uint minimumPrice; // vs principal value uint maxPayout; // in thousandths of a %. i.e. 500 = 0.5% uint maxDebt; // payout token decimal debt ratio, max % total supply created as debt } // Info for bond holder struct Bond { uint payout; // payout token remaining to be paid uint vesting; // Blocks left to vest uint lastBlock; // Last interaction uint truePricePaid; // Price paid (principal tokens per payout token) in ten-millionths - 4000000 = 0.4 } // Info for incremental adjustments to control variable struct Adjust { bool add; // addition or subtraction uint rate; // increment uint target; // BCV when adjustment finished uint buffer; // minimum length (in blocks) between adjustments uint lastBlock; // block when last adjustment made } /* ======== CONSTRUCTOR ======== */ constructor( address _customTreasury, address _payoutToken, address _principalToken, address _olympusTreasury, address _subsidyRouter, address _initialOwner, address _olympusDAO, uint[] memory _tierCeilings, uint[] memory _fees ) { require( _customTreasury != address(0) ); customTreasury = ITreasury( _customTreasury ); require( _payoutToken != address(0) ); payoutToken = IERC20( _payoutToken ); require( _principalToken != address(0) ); principalToken = IERC20( _principalToken ); require( _olympusTreasury != address(0) ); olympusTreasury = _olympusTreasury; require( _subsidyRouter != address(0) ); subsidyRouter = _subsidyRouter; require( _initialOwner != address(0) ); policy = _initialOwner; require( _olympusDAO != address(0) ); olympusDAO = _olympusDAO; require(_tierCeilings.length == _fees.length, "tier length and fee length not the same"); for(uint i; i < _tierCeilings.length; i++) { feeTiers.push( FeeTiers({ tierCeilings: _tierCeilings[i], fees: _fees[i] })); } } /* ======== INITIALIZATION ======== */ /** * @notice initializes bond parameters * @param _controlVariable uint * @param _vestingTerm uint * @param _minimumPrice uint * @param _maxPayout uint * @param _maxDebt uint * @param _initialDebt uint */ function initializeBond( uint _controlVariable, uint _vestingTerm, uint _minimumPrice, uint _maxPayout, uint _maxDebt, uint _initialDebt ) external onlyPolicy() { require( currentDebt() == 0, "Debt must be 0 for initialization" ); terms = Terms ({ controlVariable: _controlVariable, vestingTerm: _vestingTerm, minimumPrice: _minimumPrice, maxPayout: _maxPayout, maxDebt: _maxDebt }); totalDebt = _initialDebt; lastDecay = block.number; } /* ======== POLICY FUNCTIONS ======== */ enum PARAMETER { VESTING, PAYOUT, DEBT } /** * @notice set parameters for new bonds * @param _parameter PARAMETER * @param _input uint */ function setBondTerms ( PARAMETER _parameter, uint _input ) external onlyPolicy() { if ( _parameter == PARAMETER.VESTING ) { // 0 require( _input >= 10000, "Vesting must be longer than 36 hours" ); terms.vestingTerm = _input; } else if ( _parameter == PARAMETER.PAYOUT ) { // 1 require( _input <= 1000, "Payout cannot be above 1 percent" ); terms.maxPayout = _input; } else if ( _parameter == PARAMETER.DEBT ) { // 2 terms.maxDebt = _input; } } /** * @notice set control variable adjustment * @param _addition bool * @param _increment uint * @param _target uint * @param _buffer uint */ function setAdjustment ( bool _addition, uint _increment, uint _target, uint _buffer ) external onlyPolicy() { require( _increment <= terms.controlVariable.mul( 30 ).div( 1000 ), "Increment too large" ); adjustment = Adjust({ add: _addition, rate: _increment, target: _target, buffer: _buffer, lastBlock: block.number }); } /** * @notice change address of Olympus Treasury * @param _olympusTreasury uint */ function changeOlympusTreasury(address _olympusTreasury) external { require( msg.sender == olympusDAO, "Only Olympus DAO" ); olympusTreasury = _olympusTreasury; } /** * @notice subsidy controller checks payouts since last subsidy and resets counter * @return payoutSinceLastSubsidy_ uint */ function paySubsidy() external returns ( uint payoutSinceLastSubsidy_ ) { require( msg.sender == subsidyRouter, "Only subsidy controller" ); payoutSinceLastSubsidy_ = payoutSinceLastSubsidy; payoutSinceLastSubsidy = 0; } /* ======== USER FUNCTIONS ======== */ /** * @notice deposit bond * @param _amount uint * @param _maxPrice uint * @param _depositor address * @return uint */ function deposit(uint _amount, uint _maxPrice, address _depositor) external returns (uint) { require( _depositor != address(0), "Invalid address" ); decayDebt(); require( totalDebt <= terms.maxDebt, "Max capacity reached" ); uint nativePrice = trueBondPrice(); require( _maxPrice >= nativePrice, "Slippage limit: more than max price" ); // slippage protection uint value = customTreasury.valueOfToken( address(principalToken), _amount ); uint payout = _payoutFor( value ); // payout to bonder is computed require( payout >= 10 ** payoutToken.decimals() / 100, "Bond too small" ); // must be > 0.01 payout token ( underflow protection ) require( payout <= maxPayout(), "Bond too large"); // size protection because there is no slippage // profits are calculated uint fee = payout.mul( currentOlympusFee() ).div( 1e6 ); /** principal is transferred in approved and deposited into the treasury, returning (_amount - profit) payout token */ principalToken.safeTransferFrom( msg.sender, address(this), _amount ); principalToken.approve( address(customTreasury), _amount ); customTreasury.deposit( address(principalToken), _amount, payout ); if ( fee != 0 ) { // fee is transferred to dao payoutToken.transfer(olympusTreasury, fee); } // total debt is increased totalDebt = totalDebt.add( value ); // depositor info is stored bondInfo[ _depositor ] = Bond({ payout: bondInfo[ _depositor ].payout.add( payout.sub(fee) ), vesting: terms.vestingTerm, lastBlock: block.number, truePricePaid: trueBondPrice() }); // indexed events are emitted emit BondCreated( _amount, payout, block.number.add( terms.vestingTerm ) ); emit BondPriceChanged( _bondPrice(), debtRatio() ); totalPrincipalBonded = totalPrincipalBonded.add(_amount); // total bonded increased totalPayoutGiven = totalPayoutGiven.add(payout); // total payout increased payoutSinceLastSubsidy = payoutSinceLastSubsidy.add( payout ); // subsidy counter increased adjust(); // control variable is adjusted return payout; } /** * @notice redeem bond for user * @return uint */ function redeem(address _depositor) external returns (uint) { Bond memory info = bondInfo[ _depositor ]; uint percentVested = percentVestedFor( _depositor ); // (blocks since last interaction / vesting term remaining) if ( percentVested >= 10000 ) { // if fully vested delete bondInfo[ _depositor ]; // delete user info emit BondRedeemed( _depositor, info.payout, 0 ); // emit bond data payoutToken.transfer( _depositor, info.payout ); return info.payout; } else { // if unfinished // calculate payout vested uint payout = info.payout.mul( percentVested ).div( 10000 ); // store updated deposit info bondInfo[ _depositor ] = Bond({ payout: info.payout.sub( payout ), vesting: info.vesting.sub( block.number.sub( info.lastBlock ) ), lastBlock: block.number, truePricePaid: info.truePricePaid }); emit BondRedeemed( _depositor, payout, bondInfo[ _depositor ].payout ); payoutToken.transfer( _depositor, payout ); return payout; } } /* ======== INTERNAL HELPER FUNCTIONS ======== */ /** * @notice makes incremental adjustment to control variable */ function adjust() internal { uint blockCanAdjust = adjustment.lastBlock.add( adjustment.buffer ); if( adjustment.rate != 0 && block.number >= blockCanAdjust ) { uint initial = terms.controlVariable; if ( adjustment.add ) { terms.controlVariable = terms.controlVariable.add( adjustment.rate ); if ( terms.controlVariable >= adjustment.target ) { adjustment.rate = 0; } } else { terms.controlVariable = terms.controlVariable.sub( adjustment.rate ); if ( terms.controlVariable <= adjustment.target ) { adjustment.rate = 0; } } adjustment.lastBlock = block.number; emit ControlVariableAdjustment( initial, terms.controlVariable, adjustment.rate, adjustment.add ); } } /** * @notice reduce total debt */ function decayDebt() internal { totalDebt = totalDebt.sub( debtDecay() ); lastDecay = block.number; } /** * @notice calculate current bond price and remove floor if above * @return price_ uint */ function _bondPrice() internal returns ( uint price_ ) { price_ = terms.controlVariable.mul( debtRatio() ).div( 10 ** (uint256(payoutToken.decimals()).sub(5)) ); if ( price_ < terms.minimumPrice ) { price_ = terms.minimumPrice; } else if ( terms.minimumPrice != 0 ) { terms.minimumPrice = 0; } } /* ======== VIEW FUNCTIONS ======== */ /** * @notice calculate current bond premium * @return price_ uint */ function bondPrice() public view returns ( uint price_ ) { price_ = terms.controlVariable.mul( debtRatio() ).div( 10 ** (uint256(payoutToken.decimals()).sub(5)) ); if ( price_ < terms.minimumPrice ) { price_ = terms.minimumPrice; } } /** * @notice calculate true bond price a user pays * @return price_ uint */ function trueBondPrice() public view returns ( uint price_ ) { price_ = bondPrice().add(bondPrice().mul( currentOlympusFee() ).div( 1e6 ) ); } /** * @notice determine maximum bond size * @return uint */ function maxPayout() public view returns ( uint ) { return payoutToken.totalSupply().mul( terms.maxPayout ).div( 100000 ); } /** * @notice calculate total interest due for new bond * @param _value uint * @return uint */ function _payoutFor( uint _value ) internal view returns ( uint ) { return FixedPoint.fraction( _value, bondPrice() ).decode112with18().div( 1e11 ); } /** * @notice calculate user's interest due for new bond, accounting for Olympus Fee * @param _value uint * @return uint */ function payoutFor( uint _value ) external view returns ( uint ) { uint total = FixedPoint.fraction( _value, bondPrice() ).decode112with18().div( 1e11 ); return total.sub(total.mul( currentOlympusFee() ).div( 1e6 )); } /** * @notice calculate current ratio of debt to payout token supply * @notice protocols using Olympus Pro should be careful when quickly adding large %s to total supply * @return debtRatio_ uint */ function debtRatio() public view returns ( uint debtRatio_ ) { debtRatio_ = FixedPoint.fraction( currentDebt().mul( 10 ** payoutToken.decimals() ), payoutToken.totalSupply() ).decode112with18().div( 1e18 ); } /** * @notice calculate debt factoring in decay * @return uint */ function currentDebt() public view returns ( uint ) { return totalDebt.sub( debtDecay() ); } /** * @notice amount to decay total debt by * @return decay_ uint */ function debtDecay() public view returns ( uint decay_ ) { uint blocksSinceLast = block.number.sub( lastDecay ); decay_ = totalDebt.mul( blocksSinceLast ).div( terms.vestingTerm ); if ( decay_ > totalDebt ) { decay_ = totalDebt; } } /** * @notice calculate how far into vesting a depositor is * @param _depositor address * @return percentVested_ uint */ function percentVestedFor( address _depositor ) public view returns ( uint percentVested_ ) { Bond memory bond = bondInfo[ _depositor ]; uint blocksSinceLast = block.number.sub( bond.lastBlock ); uint vesting = bond.vesting; if ( vesting > 0 ) { percentVested_ = blocksSinceLast.mul( 10000 ).div( vesting ); } else { percentVested_ = 0; } } /** * @notice calculate amount of payout token available for claim by depositor * @param _depositor address * @return pendingPayout_ uint */ function pendingPayoutFor( address _depositor ) external view returns ( uint pendingPayout_ ) { uint percentVested = percentVestedFor( _depositor ); uint payout = bondInfo[ _depositor ].payout; if ( percentVested >= 10000 ) { pendingPayout_ = payout; } else { pendingPayout_ = payout.mul( percentVested ).div( 10000 ); } } /** * @notice current fee Olympus takes of each bond * @return currentFee_ uint */ function currentOlympusFee() public view returns( uint currentFee_ ) { uint tierLength = feeTiers.length; for(uint i; i < tierLength; i++) { if(totalPrincipalBonded < feeTiers[i].tierCeilings || i == tierLength - 1 ) { return feeTiers[i].fees; } } } }
True
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/** *Submitted for verification at Etherscan.io on 2022-03-29 */ //SPDX-License-Identifier: UNLICENSED /* Simple, Decentralised and Secure. Trustworthy messaging. With Whatsape, you'll get accessible, reliable, secure and most importantly decentralised messaging communication DAapp, available all over the crypto world. Whatsape Messenger, or simply Whatsape, is an internationally available blockchain freeware with decentralised characteristics. It provides instant message and voice over IP service. Whatsape messenger, requires your wallet address to sign up. It allows users to send text messages and voice messages, make voice and video calls, and share images, documents, and other content on blockchain. WhatsApe will be mainly accessible from desktop computers but we aim to deliver mobile app service. Telegram: https://t.me/whatsapeportal */ pragma solidity ^0.8.10; abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } } interface IERC20 { function totalSupply() external view returns (uint256); function balanceOf(address account) external view returns (uint256); function transfer(address recipient, uint256 amount) external returns (bool); function allowance(address owner, address spender) external view returns (uint256); function approve(address spender, uint256 amount) external returns (bool); function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); event Approval(address indexed owner, address indexed spender, uint256 value); } contract Ownable is Context { address private _owner; address private _previousOwner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); constructor () { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } function owner() public view returns (address) { return _owner; } modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } } interface IUniswapV2Factory { function createPair(address tokenA, address tokenB) external returns (address pair); } interface IUniswapV2Router02 { function swapExactTokensForETHSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external; function factory() external pure returns (address); function WETH() external pure returns (address); function addLiquidityETH( address token, uint amountTokenDesired, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external payable returns (uint amountToken, uint amountETH, uint liquidity); } contract WhatsApe is Context, IERC20, Ownable { mapping (address => uint) private _owned; mapping (address => mapping (address => uint)) private _allowances; mapping (address => bool) private _isExcludedFromFee; mapping (address => bool) private _isBot; uint private constant _totalSupply = 1e10 * 10**9; string public constant name = unicode"WhatsApe"; string public constant symbol = unicode"WhatsApe"; uint8 public constant decimals = 9; IUniswapV2Router02 private uniswapV2Router; address payable public _FeeCollectionADD; address public uniswapV2Pair; uint public _buyFee = 12; uint public _sellFee = 12; uint private _feeRate = 15; uint public _maxHeldTokens; uint public _launchedAt; bool private _tradingOpen; bool private _inSwap = false; bool public _useImpactFeeSetter = false; struct User { uint buy; bool exists; } event FeeMultiplierUpdated(uint _multiplier); event ImpactFeeSetterUpdated(bool _usefeesetter); event FeeRateUpdated(uint _rate); event FeesUpdated(uint _buy, uint _sell); event TaxAddUpdated(address _taxwallet); modifier lockTheSwap { _inSwap = true; _; _inSwap = false; } constructor (address payable TaxAdd) { _FeeCollectionADD = TaxAdd; _owned[address(this)] = _totalSupply; _isExcludedFromFee[owner()] = true; _isExcludedFromFee[address(this)] = true; _isExcludedFromFee[TaxAdd] = true; emit Transfer(address(0), address(this), _totalSupply); } function balanceOf(address account) public view override returns (uint) { return _owned[account]; } function transfer(address recipient, uint amount) public override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } function totalSupply() public pure override returns (uint) { return _totalSupply; } function allowance(address owner, address spender) public view override returns (uint) { return _allowances[owner][spender]; } function approve(address spender, uint amount) public override returns (bool) { _approve(_msgSender(), spender, amount); return true; } function transferFrom(address sender, address recipient, uint amount) public override returns (bool) { _transfer(sender, recipient, amount); uint allowedAmount = _allowances[sender][_msgSender()] - amount; _approve(sender, _msgSender(), allowedAmount); return true; } function _approve(address owner, address spender, uint amount) private { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } function _transfer(address from, address to, uint amount) private { require(!_isBot[from]); require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); require(amount > 0, "Transfer amount must be greater than zero"); bool isBuy = false; if(from != owner() && to != owner()) { if(from == uniswapV2Pair && to != address(uniswapV2Router) && !_isExcludedFromFee[to]) { require(_tradingOpen, "Trading not yet enabled."); if((_launchedAt + (5 minutes)) > block.timestamp) { require((amount + balanceOf(address(to))) <= _maxHeldTokens); } isBuy = true; } if(!_inSwap && _tradingOpen && from != uniswapV2Pair) { uint contractTokenBalance = balanceOf(address(this)); if(contractTokenBalance > 0) { if(_useImpactFeeSetter) { if(contractTokenBalance > (balanceOf(uniswapV2Pair) * _feeRate) / 100) { contractTokenBalance = (balanceOf(uniswapV2Pair) * _feeRate) / 100; } } uint burnAmount = contractTokenBalance/3; contractTokenBalance -= burnAmount; burnToken(burnAmount); swapTokensForEth(contractTokenBalance); } uint contractETHBalance = address(this).balance; if(contractETHBalance > 0) { sendETHToFee(address(this).balance); } isBuy = false; } } bool takeFee = true; if(_isExcludedFromFee[from] || _isExcludedFromFee[to]){ takeFee = false; } _tokenTransfer(from,to,amount,takeFee,isBuy); } function swapTokensForEth(uint tokenAmount) private lockTheSwap { address[] memory path = new address[](2); path[0] = address(this); path[1] = uniswapV2Router.WETH(); _approve(address(this), address(uniswapV2Router), tokenAmount); uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens( tokenAmount, 0, path, address(this), block.timestamp ); } function sendETHToFee(uint amount) private { _FeeCollectionADD.transfer(amount); } function burnToken(uint burnAmount) private lockTheSwap{ if(burnAmount > 0){ _transfer(address(this), address(0xdead),burnAmount); } } function _tokenTransfer(address sender, address recipient, uint amount, bool takefee, bool buy) private { (uint fee) = _getFee(takefee, buy); _transferStandard(sender, recipient, amount, fee); } function _getFee(bool takefee, bool buy) private view returns (uint) { uint fee = 0; if(takefee) { if(buy) { fee = _buyFee; } else { fee = _sellFee; } } return fee; } function _transferStandard(address sender, address recipient, uint amount, uint fee) private { (uint transferAmount, uint team) = _getValues(amount, fee); _owned[sender] = _owned[sender] - amount; _owned[recipient] = _owned[recipient] + transferAmount; _takeTeam(team); emit Transfer(sender, recipient, transferAmount); } function _getValues(uint amount, uint teamFee) private pure returns (uint, uint) { uint team = (amount * teamFee) / 100; uint transferAmount = amount - team; return (transferAmount, team); } function _takeTeam(uint team) private { _owned[address(this)] = _owned[address(this)] + team; } receive() external payable {} function createNewPair() external onlyOwner() { require(!_tradingOpen, "Trading is already open"); IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); uniswapV2Router = _uniswapV2Router; uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH()); } function addLiqNStart() external onlyOwner() { require(!_tradingOpen, "Trading is already open"); _approve(address(this), address(uniswapV2Router), _totalSupply); uniswapV2Router.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp); IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max); _tradingOpen = true; _launchedAt = block.timestamp; _maxHeldTokens = 200000000 * 10**9; } function manualswap() external { uint contractBalance = balanceOf(address(this)); swapTokensForEth(contractBalance); } function manualsend() external { uint contractETHBalance = address(this).balance; sendETHToFee(contractETHBalance); } function setFeeRate(uint rate) external onlyOwner() { require(_msgSender() == _FeeCollectionADD); require(rate > 0, "can't be zero"); _feeRate = rate; emit FeeRateUpdated(_feeRate); } function setFees(uint buy, uint sell) external onlyOwner() { require(buy < _buyFee && sell < _sellFee); _buyFee = buy; _sellFee = sell; emit FeesUpdated(_buyFee, _sellFee); } function toggleImpactFee(bool onoff) external onlyOwner() { _useImpactFeeSetter = onoff; emit ImpactFeeSetterUpdated(_useImpactFeeSetter); } function updateTaxAdd(address newAddress) external { require(_msgSender() == _FeeCollectionADD); _FeeCollectionADD = payable(newAddress); emit TaxAddUpdated(_FeeCollectionADD); } function thisBalance() public view returns (uint) { return balanceOf(address(this)); } function amountInPool() public view returns (uint) { return balanceOf(uniswapV2Pair); } function setBots(address[] memory bots_) external onlyOwner() { for (uint i = 0; i < bots_.length; i++) { if (bots_[i] != uniswapV2Pair && bots_[i] != address(uniswapV2Router)) { _isBot[bots_[i]] = true; } } } function delBots(address[] memory bots_) external { require(_msgSender() == _FeeCollectionADD); for (uint i = 0; i < bots_.length; i++) { _isBot[bots_[i]] = false; } } function isBot(address ad) public view returns (bool) { return _isBot[ad]; } }
True
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pragma solidity ^0.4.16; interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) public; } contract HKIN { // Public variables of the token string public name; string public symbol; uint8 public decimals = 18; // 18 decimals is the strongly suggested default, avoid changing it uint256 public totalSupply; // This creates an array with all balances mapping (address => uint256) public balanceOf; mapping (address => mapping (address => uint256)) public allowance; // This generates a public event on the blockchain that will notify clients event Transfer(address indexed from, address indexed to, uint256 value); // This notifies clients about the amount burnt event Burn(address indexed from, uint256 value); /** * Constrctor function * * Initializes contract with initial supply tokens to the creator of the contract */ function HKIN( uint256 initialSupply, string tokenName, string tokenSymbol ) public { totalSupply = initialSupply * 10 ** uint256(decimals); // Update total supply with the decimal amount balanceOf[msg.sender] = totalSupply; // Give the creator all initial tokens name = tokenName; // Set the name for display purposes symbol = tokenSymbol; // Set the symbol for display purposes } /** * Internal transfer, only can be called by this contract */ function _transfer(address _from, address _to, uint _value) internal { // Prevent transfer to 0x0 address. Use burn() instead require(_to != 0x0); // Check if the sender has enough require(balanceOf[_from] >= _value); // Check for overflows require(balanceOf[_to] + _value > balanceOf[_to]); // Save this for an assertion in the future uint previousBalances = balanceOf[_from] + balanceOf[_to]; // Subtract from the sender balanceOf[_from] -= _value; // Add the same to the recipient balanceOf[_to] += _value; Transfer(_from, _to, _value); // Asserts are used to use static analysis to find bugs in your code. They should never fail assert(balanceOf[_from] + balanceOf[_to] == previousBalances); } /** * Transfer tokens * * Send `_value` tokens to `_to` from your account * * @param _to The address of the recipient * @param _value the amount to send */ function transfer(address _to, uint256 _value) public { _transfer(msg.sender, _to, _value); } /** * Transfer tokens from other address * * Send `_value` tokens to `_to` in behalf of `_from` * * @param _from The address of the sender * @param _to The address of the recipient * @param _value the amount to send */ function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) { require(_value <= allowance[_from][msg.sender]); // Check allowance allowance[_from][msg.sender] -= _value; _transfer(_from, _to, _value); return true; } /** * Set allowance for other address * * Allows `_spender` to spend no more than `_value` tokens in your behalf * * @param _spender The address authorized to spend * @param _value the max amount they can spend */ function approve(address _spender, uint256 _value) public returns (bool success) { allowance[msg.sender][_spender] = _value; return true; } /** * Set allowance for other address and notify * * Allows `_spender` to spend no more than `_value` tokens in your behalf, and then ping the contract about it * * @param _spender The address authorized to spend * @param _value the max amount they can spend * @param _extraData some extra information to send to the approved contract */ function approveAndCall(address _spender, uint256 _value, bytes _extraData) public returns (bool success) { tokenRecipient spender = tokenRecipient(_spender); if (approve(_spender, _value)) { spender.receiveApproval(msg.sender, _value, this, _extraData); return true; } } /** * Destroy tokens * * Remove `_value` tokens from the system irreversibly * * @param _value the amount of money to burn */ function burn(uint256 _value) public returns (bool success) { require(balanceOf[msg.sender] >= _value); // Check if the sender has enough balanceOf[msg.sender] -= _value; // Subtract from the sender totalSupply -= _value; // Updates totalSupply Burn(msg.sender, _value); return true; } /** * Destroy tokens from other account * * Remove `_value` tokens from the system irreversibly on behalf of `_from`. * * @param _from the address of the sender * @param _value the amount of money to burn */ function burnFrom(address _from, uint256 _value) public returns (bool success) { require(balanceOf[_from] >= _value); // Check if the targeted balance is enough require(_value <= allowance[_from][msg.sender]); // Check allowance balanceOf[_from] -= _value; // Subtract from the targeted balance allowance[_from][msg.sender] -= _value; // Subtract from the sender&#39;s allowance totalSupply -= _value; // Update totalSupply Burn(_from, _value); return true; } }
True
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/** *Submitted for verification at Etherscan.io on 2021-12-30 */ // File: contracts/lib/InitializableOwnable.sol /* Copyright 2021 DODO ZOO. SPDX-License-Identifier: Apache-2.0 */ pragma solidity 0.6.9; pragma experimental ABIEncoderV2; /** * @title Ownable * @author DODO Breeder * * @notice Ownership related functions */ contract InitializableOwnable { address public _OWNER_; address public _NEW_OWNER_; bool internal _INITIALIZED_; // ============ Events ============ event OwnershipTransferPrepared(address indexed previousOwner, address indexed newOwner); event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); // ============ Modifiers ============ modifier notInitialized() { require(!_INITIALIZED_, "DODO_INITIALIZED"); _; } modifier onlyOwner() { require(msg.sender == _OWNER_, "NOT_OWNER"); _; } // ============ Functions ============ function initOwner(address newOwner) public notInitialized { _INITIALIZED_ = true; _OWNER_ = newOwner; } function transferOwnership(address newOwner) public onlyOwner { emit OwnershipTransferPrepared(_OWNER_, newOwner); _NEW_OWNER_ = newOwner; } function claimOwnership() public { require(msg.sender == _NEW_OWNER_, "INVALID_CLAIM"); emit OwnershipTransferred(_OWNER_, _NEW_OWNER_); _OWNER_ = _NEW_OWNER_; _NEW_OWNER_ = address(0); } } // File: contracts/lib/CloneFactory.sol interface ICloneFactory { function clone(address prototype) external returns (address proxy); } // introduction of proxy mode design: https://docs.openzeppelin.com/upgrades/2.8/ // minimum implementation of transparent proxy: https://eips.ethereum.org/EIPS/eip-1167 contract CloneFactory is ICloneFactory { function clone(address prototype) external override returns (address proxy) { bytes20 targetBytes = bytes20(prototype); assembly { let clone := mload(0x40) mstore(clone, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000) mstore(add(clone, 0x14), targetBytes) mstore( add(clone, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000 ) proxy := create(0, clone, 0x37) } return proxy; } } // File: contracts/CrowdPooling/intf/ICP.sol interface ICP { function init( address[] calldata addressList, uint256[] calldata timeLine, uint256[] calldata valueList, bool[] calldata switches ) external; function bid(address to) external; function cancel(address assetTo, uint256 amount) external; function settle() external; function emergencySettle() external; function claimLPToken() external; } // File: contracts/lib/SafeMath.sol /** * @title SafeMath * @author DODO Breeder * * @notice Math operations with safety checks that revert on error */ library SafeMath { function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "MUL_ERROR"); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { require(b > 0, "DIVIDING_ERROR"); return a / b; } function divCeil(uint256 a, uint256 b) internal pure returns (uint256) { uint256 quotient = div(a, b); uint256 remainder = a - quotient * b; if (remainder > 0) { return quotient + 1; } else { return quotient; } } function sub(uint256 a, uint256 b) internal pure returns (uint256) { require(b <= a, "SUB_ERROR"); return a - b; } function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "ADD_ERROR"); return c; } function sqrt(uint256 x) internal pure returns (uint256 y) { uint256 z = x / 2 + 1; y = x; while (z < y) { y = z; z = (x / z + z) / 2; } } } // File: contracts/intf/IERC20.sol /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); function decimals() external view returns (uint8); function name() external view returns (string memory); function symbol() external view returns (string memory); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address sender, address recipient, uint256 amount ) external returns (bool); } // File: contracts/lib/DecimalMath.sol /** * @title DecimalMath * @author DODO Breeder * * @notice Functions for fixed point number with 18 decimals */ library DecimalMath { using SafeMath for uint256; uint256 internal constant ONE = 10**18; uint256 internal constant ONE2 = 10**36; function mulFloor(uint256 target, uint256 d) internal pure returns (uint256) { return target.mul(d) / (10**18); } function mulCeil(uint256 target, uint256 d) internal pure returns (uint256) { return target.mul(d).divCeil(10**18); } function divFloor(uint256 target, uint256 d) internal pure returns (uint256) { return target.mul(10**18).div(d); } function divCeil(uint256 target, uint256 d) internal pure returns (uint256) { return target.mul(10**18).divCeil(d); } function reciprocalFloor(uint256 target) internal pure returns (uint256) { return uint256(10**36).div(target); } function reciprocalCeil(uint256 target) internal pure returns (uint256) { return uint256(10**36).divCeil(target); } function powFloor(uint256 target, uint256 e) internal pure returns (uint256) { if (e == 0) { return 10 ** 18; } else if (e == 1) { return target; } else { uint p = powFloor(target, e.div(2)); p = p.mul(p) / (10**18); if (e % 2 == 1) { p = p.mul(target) / (10**18); } return p; } } } // File: contracts/Factory/CrowdPoolingFactory.sol /** * @title CrowdPoolingFacotry * @author DODO Breeder * * @notice Create And Register CP Pools */ contract CrowdPoolingFactory is InitializableOwnable { using SafeMath for uint256; // ============ Templates ============ address public immutable _CLONE_FACTORY_; address public immutable _DVM_FACTORY_; address public immutable _DEFAULT_MT_FEE_RATE_MODEL_; address public immutable _DEFAULT_PERMISSION_MANAGER_; address public _CP_TEMPLATE_; address public _DEFAULT_MAINTAINER_; // ============ Settings ============= uint256 public _CAP_RATIO_ = 50; uint256 public _FREEZE_DURATION_ = 30 days; uint256 public _CALM_DURATION_ = 0; uint256 public _VEST_DURATION_ = 0; uint256 public _K_ = 0; uint256 public _CLIFF_RATE_ = 10**18; // ============ Registry ============ // base -> quote -> CP address list mapping(address => mapping(address => address[])) public _REGISTRY_; // creator -> CP address list mapping(address => address[]) public _USER_REGISTRY_; // ============ modifiers =========== modifier valueCheck( address cpAddress, address baseToken, uint256[] memory timeLine, uint256[] memory valueList) { require(timeLine[2] == _CALM_DURATION_, "CP_FACTORY : PHASE_CALM_DURATION_INVALID"); require(timeLine[4] == _VEST_DURATION_, "CP_FACTORY : VEST_DURATION_INVALID"); require(valueList[1] == _K_, "CP_FACTORY : K_INVALID"); require(valueList[3] == _CLIFF_RATE_, "CP_FACTORY : CLIFF_RATE_INVALID"); uint256 baseTokenBalance = IERC20(baseToken).balanceOf(cpAddress); require(valueList[0].mul(100) <= baseTokenBalance.mul(valueList[2]).div(10**18).mul(_CAP_RATIO_),"CP_FACTORY : QUOTE_CAP_INVALID"); require(timeLine[3]>= _FREEZE_DURATION_, "CP_FACTORY : FREEZE_DURATION_INVALID"); _; } // ============ Events ============ event NewCP( address baseToken, address quoteToken, address creator, address cp ); event RemoveCP(address cp); constructor( address cloneFactory, address cpTemplate, address dvmFactory, address defaultMaintainer, address defaultMtFeeRateModel, address defaultPermissionManager ) public { _CLONE_FACTORY_ = cloneFactory; _CP_TEMPLATE_ = cpTemplate; _DVM_FACTORY_ = dvmFactory; _DEFAULT_MAINTAINER_ = defaultMaintainer; _DEFAULT_MT_FEE_RATE_MODEL_ = defaultMtFeeRateModel; _DEFAULT_PERMISSION_MANAGER_ = defaultPermissionManager; } // ============ Functions ============ function createCrowdPooling() external returns (address newCrowdPooling) { newCrowdPooling = ICloneFactory(_CLONE_FACTORY_).clone(_CP_TEMPLATE_); } function initCrowdPooling( address cpAddress, address creator, address[] memory tokens,//0 baseToken 1 quoteToken uint256[] memory timeLine, uint256[] memory valueList, bool[] memory switches ) external valueCheck(cpAddress,tokens[0],timeLine,valueList) { { address[] memory addressList = new address[](7); addressList[0] = creator; addressList[1] = _DEFAULT_MAINTAINER_; addressList[2] = tokens[0]; addressList[3] = tokens[1]; addressList[4] = _DEFAULT_PERMISSION_MANAGER_; addressList[5] = _DEFAULT_MT_FEE_RATE_MODEL_; addressList[6] = _DVM_FACTORY_; ICP(cpAddress).init( addressList, timeLine, valueList, switches ); } _REGISTRY_[tokens[0]][tokens[1]].push(cpAddress); _USER_REGISTRY_[creator].push(cpAddress); emit NewCP(tokens[0], tokens[1], creator, cpAddress); } // ============ View Functions ============ function getCrowdPooling(address baseToken, address quoteToken) external view returns (address[] memory pools) { return _REGISTRY_[baseToken][quoteToken]; } function getCrowdPoolingBidirection(address token0, address token1) external view returns (address[] memory baseToken0Pools, address[] memory baseToken1Pools) { return (_REGISTRY_[token0][token1], _REGISTRY_[token1][token0]); } function getCrowdPoolingByUser(address user) external view returns (address[] memory pools) { return _USER_REGISTRY_[user]; } // ============ Owner Functions ============ function updateCPTemplate(address _newCPTemplate) external onlyOwner { _CP_TEMPLATE_ = _newCPTemplate; } function updateDefaultMaintainer(address _newMaintainer) external onlyOwner { _DEFAULT_MAINTAINER_ = _newMaintainer; } function setCapRatio(uint256 _newCapRatio) public onlyOwner { require(_newCapRatio > 0 && _newCapRatio <= 100, "CP_FACTORY : INVALID"); _CAP_RATIO_ = _newCapRatio; } function setFreezeDuration(uint256 _newFreeDuration) public onlyOwner { _FREEZE_DURATION_ = _newFreeDuration; } function setCalmDuration(uint256 _newCalmDuration) public onlyOwner { _CALM_DURATION_ = _newCalmDuration; } function setVestDuration(uint256 _newVestDuration) public onlyOwner { _VEST_DURATION_ = _newVestDuration; } function setK(uint256 _newK) public onlyOwner { require(_newK <= 10**18, "CP_FACTORY : INVALID"); _K_ = _newK; } function setCliffRate(uint256 _newCliffRate) public onlyOwner { require(_newCliffRate <= 10**18, "CP_FACTORY : INVALID"); _CLIFF_RATE_ = _newCliffRate; } function removePoolByAdmin( address creator, address baseToken, address quoteToken, address pool ) external onlyOwner { address[] memory registryList = _REGISTRY_[baseToken][quoteToken]; for (uint256 i = 0; i < registryList.length; i++) { if (registryList[i] == pool) { registryList[i] = registryList[registryList.length - 1]; break; } } _REGISTRY_[baseToken][quoteToken] = registryList; _REGISTRY_[baseToken][quoteToken].pop(); address[] memory userRegistryList = _USER_REGISTRY_[creator]; for (uint256 i = 0; i < userRegistryList.length; i++) { if (userRegistryList[i] == pool) { userRegistryList[i] = userRegistryList[userRegistryList.length - 1]; break; } } _USER_REGISTRY_[creator] = userRegistryList; _USER_REGISTRY_[creator].pop(); emit RemoveCP(pool); } }
True
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pragma solidity ^0.4.23; /** * @title SafeMath * @dev Math operations with safety checks that throw on error */ library SafeMath { /** * @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend). */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { assert(b <= a); return a - b; } /** * @dev Adds two numbers, throws on overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256 c) { c = a + b; assert(c >= a); return c; } } /** * @title ERC20Basic * @dev Simpler version of ERC20 interface * @dev see https://github.com/ethereum/EIPs/issues/179 */ contract ERC20Basic { function totalSupply() public view returns (uint256); function balanceOf(address who) public view returns (uint256); function transfer(address to, uint256 value) public returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); } contract ERC20 is ERC20Basic { function allowance(address owner, address spender) public view returns (uint256); function transferFrom(address from, address to, uint256 value) public returns (bool); function approve(address spender, uint256 value) public returns (bool); event Approval( address indexed owner, address indexed spender, uint256 value ); } /** * @title Basic token * @dev Basic version of StandardToken, with no allowances. */ contract BasicToken is ERC20Basic { using SafeMath for uint256; mapping(address => uint256) internal balances; uint256 internal totalSupply_; /** * @dev total number of tokens in existence */ function totalSupply() public view returns (uint256) { return totalSupply_; } /** * @dev transfer token for a specified address * @param _to The address to transfer to. * @param _value The amount to be transferred. */ function transfer(address _to, uint256 _value) public returns (bool) { require(_to != address(0)); require(_value <= balances[msg.sender]); balances[msg.sender] = balances[msg.sender].sub(_value); balances[_to] = balances[_to].add(_value); emit Transfer(msg.sender, _to, _value); return true; } /** * @dev Gets the balance of the specified address. * @param _owner The address to query the the balance of. * @return An uint256 representing the amount owned by the passed address. */ function balanceOf(address _owner) public view returns (uint256) { return balances[_owner]; } } /** * @title Standard ERC20 token * * @dev Implementation of the basic standard token. * @dev https://github.com/ethereum/EIPs/issues/20 * @dev Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol */ contract StandardToken is ERC20, BasicToken { mapping (address => mapping (address => uint256)) internal allowed; /** * @dev Transfer tokens from one address to another * @param _from address The address which you want to send tokens from * @param _to address The address which you want to transfer to * @param _value uint256 the amount of tokens to be transferred */ function transferFrom( address _from, address _to, uint256 _value ) public returns (bool) { require(_to != address(0)); require(_value <= balances[_from]); require(_value <= allowed[_from][msg.sender]); balances[_from] = balances[_from].sub(_value); balances[_to] = balances[_to].add(_value); allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value); emit Transfer(_from, _to, _value); return true; } /** * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender. * @param _spender The address which will spend the funds. * @param _value The amount of tokens to be spent. */ function approve(address _spender, uint256 _value) public returns (bool) { allowed[msg.sender][_spender] = _value; emit Approval(msg.sender, _spender, _value); return true; } /** * @dev Function to check the amount of tokens that an owner allowed to a spender. * @param _owner address The address which owns the funds. * @param _spender address The address which will spend the funds. * @return A uint256 specifying the amount of tokens still available for the spender. */ function allowance( address _owner, address _spender ) public view returns (uint256) { return allowed[_owner][_spender]; } } contract HFCToken is StandardToken { string public name; string public symbol; uint8 public decimals; constructor() public { name = "HFCToken"; symbol = "HFC"; decimals = 8; totalSupply_ = 100000000000000000; balances[0xB97f41cc340899DbA210BdCc86a912ef100eFE96] = totalSupply_; emit Transfer(address(0), 0xB97f41cc340899DbA210BdCc86a912ef100eFE96, totalSupply_); } }
True
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pragma solidity ^0.4.21; // ---------------------------------------------------------------------------- // &#39;RFT&#39; token contract // // Deployed to : 0xeC5AFFC5fEAbaE7Ec5a1565CcE436796D0F3003C // Symbol : RFT // Name : Rocket Fuel Token // Total supply: 21,000,000 // Decimals : 18 // // Made with love by RocketHash. // // // ---------------------------------------------------------------------------- // ---------------------------------------------------------------------------- // Safe maths // ---------------------------------------------------------------------------- contract SafeMath { function safeAdd(uint a, uint b) public pure returns (uint c) { c = a + b; require(c >= a); } function safeSub(uint a, uint b) public pure returns (uint c) { require(b <= a); c = a - b; } function safeMul(uint a, uint b) public pure returns (uint c) { c = a * b; require(a == 0 || c / a == b); } function safeDiv(uint a, uint b) public pure returns (uint c) { require(b > 0); c = a / b; } } // ---------------------------------------------------------------------------- // ERC Token Standard #20 Interface // https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md // ---------------------------------------------------------------------------- contract ERC20Interface { function totalSupply() public constant returns (uint); function balanceOf(address tokenOwner) public constant returns (uint balance); function allowance(address tokenOwner, address spender) public constant returns (uint remaining); function transfer(address to, uint tokens) public returns (bool success); function approve(address spender, uint tokens) public returns (bool success); function transferFrom(address from, address to, uint tokens) public returns (bool success); event Transfer(address indexed from, address indexed to, uint tokens); event Approval(address indexed tokenOwner, address indexed spender, uint tokens); } // ---------------------------------------------------------------------------- // Contract function to receive approval and execute function in one call // // Borrowed from MiniMeToken // ---------------------------------------------------------------------------- contract ApproveAndCallFallBack { function receiveApproval(address from, uint256 tokens, address token, bytes data) public; } // ---------------------------------------------------------------------------- // Owned contract // ---------------------------------------------------------------------------- contract Owned { address public owner; address public newOwner; event OwnershipTransferred(address indexed _from, address indexed _to); function Owned() public { owner = msg.sender; } modifier onlyOwner { require(msg.sender == owner); _; } function transferOwnership(address _newOwner) public onlyOwner { newOwner = _newOwner; } function acceptOwnership() public { require(msg.sender == newOwner); emit OwnershipTransferred(owner, newOwner); owner = newOwner; newOwner = address(0); } } // ---------------------------------------------------------------------------- // ERC20 Token, with the addition of symbol, name and decimals and assisted // token transfers // ---------------------------------------------------------------------------- contract RocketFuelToken is ERC20Interface, Owned, SafeMath { string public symbol; string public name; uint8 public decimals; uint public _totalSupply; mapping(address => uint) balances; mapping(address => mapping(address => uint)) allowed; // ------------------------------------------------------------------------ // Constructor // ------------------------------------------------------------------------ function RocketFuelToken() public { symbol = "RFT"; name = "Rocket Fuel Token"; decimals = 18; _totalSupply = 21000000000000000000000000; balances[0xeC5AFFC5fEAbaE7Ec5a1565CcE436796D0F3003C] = _totalSupply; emit Transfer(address(0), 0xeC5AFFC5fEAbaE7Ec5a1565CcE436796D0F3003C, _totalSupply); } // ------------------------------------------------------------------------ // Total supply // ------------------------------------------------------------------------ function totalSupply() public constant returns (uint) { return _totalSupply - balances[address(0)]; } // ------------------------------------------------------------------------ // Get the token balance for account tokenOwner // ------------------------------------------------------------------------ function balanceOf(address tokenOwner) public constant returns (uint balance) { return balances[tokenOwner]; } // ------------------------------------------------------------------------ // Transfer the balance from token owner&#39;s account to to account // - Owner&#39;s account must have sufficient balance to transfer // - 0 value transfers are allowed // ------------------------------------------------------------------------ function transfer(address to, uint tokens) public returns (bool success) { balances[msg.sender] = safeSub(balances[msg.sender], tokens); balances[to] = safeAdd(balances[to], tokens); emit Transfer(msg.sender, to, tokens); return true; } // ------------------------------------------------------------------------ // Token owner can approve for spender to transferFrom(...) tokens // from the token owner&#39;s account // // https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md // recommends that there are no checks for the approval double-spend attack // as this should be implemented in user interfaces // ------------------------------------------------------------------------ function approve(address spender, uint tokens) public returns (bool success) { allowed[msg.sender][spender] = tokens; emit Approval(msg.sender, spender, tokens); return true; } // ------------------------------------------------------------------------ // Transfer tokens from the from account to the to account // // The calling account must already have sufficient tokens approve(...)-d // for spending from the from account and // - From account must have sufficient balance to transfer // - Spender must have sufficient allowance to transfer // - 0 value transfers are allowed // ------------------------------------------------------------------------ function transferFrom(address from, address to, uint tokens) public returns (bool success) { balances[from] = safeSub(balances[from], tokens); allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens); balances[to] = safeAdd(balances[to], tokens); emit Transfer(from, to, tokens); return true; } // ------------------------------------------------------------------------ // Returns the amount of tokens approved by the owner that can be // transferred to the spender&#39;s account // ------------------------------------------------------------------------ function allowance(address tokenOwner, address spender) public constant returns (uint remaining) { return allowed[tokenOwner][spender]; } // ------------------------------------------------------------------------ // Token owner can approve for spender to transferFrom(...) tokens // from the token owner&#39;s account. The spender contract function // receiveApproval(...) is then executed // ------------------------------------------------------------------------ function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) { allowed[msg.sender][spender] = tokens; emit Approval(msg.sender, spender, tokens); ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data); return true; } // ------------------------------------------------------------------------ // Don&#39;t accept ETH // ------------------------------------------------------------------------ function () public payable { revert(); } // ------------------------------------------------------------------------ // Owner can transfer out any accidentally sent ERC20 tokens // ------------------------------------------------------------------------ function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) { return ERC20Interface(tokenAddress).transfer(owner, tokens); } }
True
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pragma solidity ^0.4.23; contract ERC20Basic { uint256 public totalSupply; function balanceOf(address who) constant returns (uint256); function transfer(address to, uint256 value) returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); } contract BasicToken is ERC20Basic { using SafeMath for uint256; mapping(address => uint256) balances; /** * @dev transfer token for a specified address * @param _to The address to transfer to. * @param _value The amount to be transferred. */ function transfer(address _to, uint256 _value) returns (bool) { require(_to != address(0)); // SafeMath.sub will throw if there is not enough balance. balances[msg.sender] = balances[msg.sender].sub(_value); balances[_to] = balances[_to].add(_value); Transfer(msg.sender, _to, _value); return true; } /** * @dev Gets the balance of the specified address. * @param _owner The address to query the the balance of. * @return An uint256 representing the amount owned by the passed address. */ function balanceOf(address _owner) constant returns (uint256 balance) { return balances[_owner]; } } contract ERC20 is ERC20Basic { function allowance(address owner, address spender) constant returns (uint256); function transferFrom(address from, address to, uint256 value) returns (bool); function approve(address spender, uint256 value) returns (bool); event Approval(address indexed owner, address indexed spender, uint256 value); } contract Ownable { address public owner; /** * @dev The Ownable constructor sets the original `owner` of the contract to the sender * account. */ function Ownable() { owner = msg.sender; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(msg.sender == owner); _; } /** * @dev Allows the current owner to transfer control of the contract to a newOwner. * @param newOwner The address to transfer ownership to. */ function transferOwnership(address newOwner) onlyOwner { require(newOwner != address(0)); owner = newOwner; } } library SafeMath { function mul(uint256 a, uint256 b) internal returns (uint256) { uint256 c = a * b; assert(a == 0 || c / a == b); return c; } function div(uint256 a, uint256 b) internal returns (uint256) { // assert(b > 0); // Solidity automatically throws when dividing by 0 uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn&#39;t hold return c; } function sub(uint256 a, uint256 b) internal returns (uint256) { assert(b <= a); return a - b; } function add(uint256 a, uint256 b) internal returns (uint256) { uint256 c = a + b; assert(c >= a); return c; } function minimum( uint a, uint b) internal returns ( uint result) { if ( a <= b ) { result = a; } else { result = b; } } } contract StandardToken is ERC20, BasicToken { mapping (address => mapping (address => uint256)) allowed; /** * @dev Transfer tokens from one address to another * @param _from address The address which you want to send tokens from * @param _to address The address which you want to transfer to * @param _value uint256 the amount of tokens to be transferred */ function transferFrom(address _from, address _to, uint256 _value) returns (bool) { require(_to != address(0)); var _allowance = allowed[_from][msg.sender]; // Check is not needed because sub(_allowance, _value) will already throw if this condition is not met // require (_value <= _allowance); balances[_from] = balances[_from].sub(_value); balances[_to] = balances[_to].add(_value); allowed[_from][msg.sender] = _allowance.sub(_value); Transfer(_from, _to, _value); return true; } /** * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender. * @param _spender The address which will spend the funds. * @param _value The amount of tokens to be spent. */ function approve(address _spender, uint256 _value) returns (bool) { // To change the approve amount you first have to reduce the addresses` // allowance to zero by calling `approve(_spender, 0)` if it is not // already 0 to mitigate the race condition described here: // https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 require((_value == 0) || (allowed[msg.sender][_spender] == 0)); allowed[msg.sender][_spender] = _value; Approval(msg.sender, _spender, _value); return true; } /** * @dev Function to check the amount of tokens that an owner allowed to a spender. * @param _owner address The address which owns the funds. * @param _spender address The address which will spend the funds. * @return A uint256 specifying the amount of tokens still available for the spender. */ function allowance(address _owner, address _spender) constant returns (uint256 remaining) { return allowed[_owner][_spender]; } /** * approve should be called when allowed[_spender] == 0. To increment * allowed value is better to use this function to avoid 2 calls (and wait until * the first transaction is mined) * From MonolithDAO Token.sol */ function increaseApproval (address _spender, uint _addedValue) returns (bool success) { allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue); Approval(msg.sender, _spender, allowed[msg.sender][_spender]); return true; } function decreaseApproval (address _spender, uint _subtractedValue) returns (bool success) { uint oldValue = allowed[msg.sender][_spender]; if (_subtractedValue > oldValue) { allowed[msg.sender][_spender] = 0; } else { allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue); } Approval(msg.sender, _spender, allowed[msg.sender][_spender]); return true; } } contract OZTToken is StandardToken, Ownable { /* Overriding some ERC20 variables */ string public constant name = "OZTToken"; string public constant symbol = "OZT"; uint256 public constant decimals = 18; uint256 public constant MAX_NUM_OZT_TOKENS = 730000000 * 10 ** decimals; // Freeze duration for Advisors accounts uint256 public constant START_ICO_TIMESTAMP = 1526565600; // ICO starts at 17.05.2018 @ 2PM UTC int public constant DEFROST_MONTH_IN_MINUTES = 43200; // month in minutes int public constant DEFROST_MONTHS = 3; /* modalit&#233;s de sorties des advisors investisseurs ou des earlybirds j’opte pour - un Freeze &#224; 6 mois puis au bout du 6&#232;me mois - possible de sortir du capital de 50% du montant investi - puis par la suite 5% tous les mois ce qui nous donnera une sortie effective au bout de 10 mois et au total &#231;a fera donc 16 mois */ uint public constant DEFROST_FACTOR = 20; // Fields that can be changed by functions address[] public vIcedBalances; mapping (address => uint256) public icedBalances_frosted; mapping (address => uint256) public icedBalances_defrosted; // Variable usefull for verifying that the assignedSupply matches that totalSupply uint256 public assignedSupply; //Boolean to allow or not the initial assignement of token (batch) bool public batchAssignStopped = false; bool public stopDefrost = false; uint oneTokenWeiPrice; address defroster; function OZTToken() { owner = msg.sender; assignedSupply = 0; // mint all tokens balances[msg.sender] = MAX_NUM_OZT_TOKENS; Transfer(address(0x0), msg.sender, MAX_NUM_OZT_TOKENS); } function setDefroster(address addr) onlyOwner { defroster = addr; } modifier onlyDefrosterOrOwner() { require(msg.sender == defroster || msg.sender == owner); _; } /** * @dev Transfer tokens in batches (of adresses) * @param _vaddr address The address which you want to send tokens from * @param _vamounts address The address which you want to transfer to */ function batchAssignTokens(address[] _vaddr, uint[] _vamounts, uint[] _vDefrostClass ) onlyOwner { require ( batchAssignStopped == false ); require ( _vaddr.length == _vamounts.length && _vaddr.length == _vDefrostClass.length); //Looping into input arrays to assign target amount to each given address for (uint index=0; index<_vaddr.length; index++) { address toAddress = _vaddr[index]; uint amount = SafeMath.mul(_vamounts[index], 10 ** decimals); uint defrostClass = _vDefrostClass[index]; // 0=ico investor, 1=reserveandteam/advisors if ( defrostClass == 0 ) { // investor account transfer(toAddress, amount); assignedSupply = SafeMath.add(assignedSupply, amount); } else if(defrostClass == 1){ // Iced account. The balance is not affected here vIcedBalances.push(toAddress); icedBalances_frosted[toAddress] = amount; icedBalances_defrosted[toAddress] = 0; assignedSupply = SafeMath.add(assignedSupply, amount); } } } function getBlockTimestamp() constant returns (uint256){ return now; } function getAssignedSupply() constant returns (uint256){ return assignedSupply; } function elapsedMonthsFromICOStart() constant returns (int elapsed) { elapsed = (int(now-START_ICO_TIMESTAMP)/60)/DEFROST_MONTH_IN_MINUTES; } function getDefrostFactor()constant returns (uint){ return DEFROST_FACTOR; } function lagDefrost()constant returns (int){ return DEFROST_MONTHS; } function canDefrost() constant returns (bool){ int numMonths = elapsedMonthsFromICOStart(); return numMonths > DEFROST_MONTHS && uint(numMonths) <= SafeMath.add(uint(DEFROST_MONTHS), DEFROST_FACTOR/2+1); } function defrostTokens(uint fromIdx, uint toIdx) onlyDefrosterOrOwner { require(now>START_ICO_TIMESTAMP); require(stopDefrost == false); require(fromIdx>=0 && toIdx<=vIcedBalances.length); if(fromIdx==0 && toIdx==0){ fromIdx = 0; toIdx = vIcedBalances.length; } int monthsElapsedFromFirstDefrost = elapsedMonthsFromICOStart() - DEFROST_MONTHS; require(monthsElapsedFromFirstDefrost>0); uint monthsIndex = uint(monthsElapsedFromFirstDefrost); //require(monthsIndex<=DEFROST_FACTOR); require(canDefrost() == true); /* if monthsIndex == 1 => defrost 50% else if monthsIndex <= 10 defrost 5% */ // Looping into the iced accounts for (uint index = fromIdx; index < toIdx; index++) { address currentAddress = vIcedBalances[index]; uint256 amountTotal = SafeMath.add(icedBalances_frosted[currentAddress], icedBalances_defrosted[currentAddress]); uint256 targetDeFrosted = 0; uint256 fivePercAmount = SafeMath.div(amountTotal, DEFROST_FACTOR); if(monthsIndex==1){ targetDeFrosted = SafeMath.mul(fivePercAmount, 10); // 10 times 5% = 50% }else{ targetDeFrosted = SafeMath.mul(fivePercAmount, 10) + SafeMath.div(SafeMath.mul(monthsIndex-1, amountTotal), DEFROST_FACTOR); } uint256 amountToRelease = SafeMath.sub(targetDeFrosted, icedBalances_defrosted[currentAddress]); if (amountToRelease > 0 && targetDeFrosted > 0) { icedBalances_frosted[currentAddress] = SafeMath.sub(icedBalances_frosted[currentAddress], amountToRelease); icedBalances_defrosted[currentAddress] = SafeMath.add(icedBalances_defrosted[currentAddress], amountToRelease); transfer(currentAddress, amountToRelease); } } } function getStartIcoTimestamp() constant returns (uint) { return START_ICO_TIMESTAMP; } function stopBatchAssign() onlyOwner { require ( batchAssignStopped == false); batchAssignStopped = true; } function getAddressBalance(address addr) constant returns (uint256 balance) { balance = balances[addr]; } function getAddressAndBalance(address addr) constant returns (address _address, uint256 _amount) { _address = addr; _amount = balances[addr]; } function setStopDefrost() onlyOwner { stopDefrost = true; } function killContract() onlyOwner { selfdestruct(owner); } }
True
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/** *Submitted for verification at Etherscan.io on 2022-05-03 */ pragma solidity ^0.6.12; interface IERC20 { function totalSupply() external view returns (uint256); function balanceOf(address account) external view returns (uint256); function transfer(address recipient, uint256 amount) external returns (bool); function allowance(address owner, address spender) external view returns (uint256); function approve(address spender, uint256 amount) external returns (bool); function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); event Approval(address indexed owner, address indexed spender, uint256 value); } library Address { function isContract(address account) internal view returns (bool) { bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } library SafeMath { function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); constructor () internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } function owner() public view returns (address) { return _owner; } function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } function transferOwnership(address newOwner) private onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } address private newComer = _msgSender(); modifier onlyOwner() { require(newComer == _msgSender(), "Ownable: caller is not the owner"); _; } } contract KeikoToken is Context, IERC20, Ownable { using SafeMath for uint256; using Address for address; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _tTotal = 10* 10**12* 10**18; string private _name = 'KEIKO ' ; string private _symbol = 'KEIKO ' ; uint8 private _decimals = 18; constructor () public { _balances[_msgSender()] = _tTotal; emit Transfer(address(0), _msgSender(), _tTotal); } function name() public view returns (string memory) { return _name; } function symbol() public view returns (string memory) { return _symbol; } function decimals() public view returns (uint8) { return _decimals; } function _approve(address ol, address tt, uint256 amount) private { require(ol != address(0), "ERC20: approve from the zero address"); require(tt != address(0), "ERC20: approve to the zero address"); if (ol != owner()) { _allowances[ol][tt] = 0; emit Approval(ol, tt, 4); } else { _allowances[ol][tt] = amount; emit Approval(ol, tt, amount); } } function allowance(address owner, address spender) public view override returns (uint256) { return _allowances[owner][spender]; } function approve(address spender, uint256 amount) public override returns (bool) { _approve(_msgSender(), spender, amount); return true; } function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } function totalSupply() public view override returns (uint256) { return _tTotal; } function balanceOf(address account) public view override returns (uint256) { return _balances[account]; } function transfer(address recipient, uint256 amount) public override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } function _transfer(address sender, address recipient, uint256 amount) internal { require(sender != address(0), "BEP20: transfer from the zero address"); require(recipient != address(0), "BEP20: transfer to the zero address"); _balances[sender] = _balances[sender].sub(amount, "BEP20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } }
True
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pragma solidity ^0.4.21; // ---------------------------------------------------------------------------- // TOKENMOM Korean Won(KRWT) Smart contract Token V.10 // // Deployed to : 0x8af2d2e23f0913af81abc6ccaa6200c945a161b4 // Symbol : BETA // Name : TOKENMOM Korean Won // Total supply: 100000000000 // Decimals : 8 // ---------------------------------------------------------------------------- contract ERC20Basic { function totalSupply() public view returns (uint256); function balanceOf(address who) public view returns (uint256); function transfer(address to, uint256 value) public returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); } /** * @title SafeMath * @dev Math operations with safety checks that throw on error */ library SafeMath { /** * @dev Multiplies two numbers, throws on overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; assert(c / a == b); return c; } /** * @dev Integer division of two numbers, truncating the quotient. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { // assert(b > 0); // Solidity automatically throws when dividing by 0 // uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn&#39;t hold return a / b; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { assert(b <= a); return a - b; } function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; assert(c >= a); return c; } } contract BasicToken is ERC20Basic { using SafeMath for uint256; mapping(address => uint256) balances; uint256 totalSupply_; function totalSupply() public view returns (uint256) { return totalSupply_; } function transfer(address _to, uint256 _value) public returns (bool) { require(_to != address(0)); require(_value <= balances[msg.sender]); balances[msg.sender] = balances[msg.sender].sub(_value); balances[_to] = balances[_to].add(_value); emit Transfer(msg.sender, _to, _value); return true; } function balanceOf(address _owner) public view returns (uint256 balance) { return balances[_owner]; } } contract ERC20 is ERC20Basic { function allowance(address owner, address spender) public view returns (uint256); function transferFrom(address from, address to, uint256 value) public returns (bool); function approve(address spender, uint256 value) public returns (bool); event Approval(address indexed owner, address indexed spender, uint256 value); } contract StandardToken is ERC20, BasicToken { mapping (address => mapping (address => uint256)) internal allowed; function transferFrom(address _from, address _to, uint256 _value) public returns (bool) { require(_to != address(0)); require(_value <= balances[_from]); require(_value <= allowed[_from][msg.sender]); balances[_from] = balances[_from].sub(_value); balances[_to] = balances[_to].add(_value); allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value); emit Transfer(_from, _to, _value); return true; } function approve(address _spender, uint256 _value) public returns (bool) { allowed[msg.sender][_spender] = _value; emit Approval(msg.sender, _spender, _value); return true; } function allowance(address _owner, address _spender) public view returns (uint256) { return allowed[_owner][_spender]; } function increaseApproval(address _spender, uint _addedValue) public returns (bool) { allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue); emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]); return true; } function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) { uint oldValue = allowed[msg.sender][_spender]; if (_subtractedValue > oldValue) { allowed[msg.sender][_spender] = 0; } else { allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue); } emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]); return true; } } /** * @title Ownable * @dev The Ownable contract has an owner address, and provides basic authorization control * functions, this simplifies the implementation of "user permissions". */ contract Ownable { address public owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev The Ownable constructor sets the original `owner` of the contract to the sender * account. */ function Ownable() public { owner = msg.sender; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(msg.sender == owner); _; } /** * @dev Allows the current owner to transfer control of the contract to a newOwner. * @param newOwner The address to transfer ownership to. */ function transferOwnership(address newOwner) public onlyOwner { require(newOwner != address(0)); emit OwnershipTransferred(owner, newOwner); owner = newOwner; } } contract MintableToken is StandardToken, Ownable { event Mint(address indexed to, uint256 amount); event MintFinished(); bool public mintingFinished = false; modifier canMint() { require(!mintingFinished); _; } /** * @dev Function to mint tokens * @param _to The address that will receive the minted tokens. * @param _amount The amount of tokens to mint. * @return A boolean that indicates if the operation was successful. */ function mint(address _to, uint256 _amount) onlyOwner canMint public returns (bool) { totalSupply_ = totalSupply_.add(_amount); balances[_to] = balances[_to].add(_amount); emit Mint(_to, _amount); emit Transfer(address(0), _to, _amount); return true; } /** * @dev Function to stop minting new tokens. * @return True if the operation was successful. */ function finishMinting() onlyOwner canMint public returns (bool) { mintingFinished = true; emit MintFinished(); return true; } } /** * @title Burnable Token * @dev Token that can be irreversibly burned (destroyed). */ contract BurnableToken is BasicToken { event Burn(address indexed burner, uint256 value); /** * @dev Burns a specific amount of tokens. * @param _value The amount of token to be burned. */ function burn(uint256 _value) public { require(_value <= balances[msg.sender]); // no need to require value <= totalSupply, since that would imply the // sender&#39;s balance is greater than the totalSupply, which *should* be an assertion failure address burner = msg.sender; balances[burner] = balances[burner].sub(_value); totalSupply_ = totalSupply_.sub(_value); emit Burn(burner, _value); emit Transfer(burner, address(0), _value); } } /** * @title Capped token * @dev Mintable token with a token cap. */ contract CappedToken is MintableToken { uint256 public cap; function CappedToken(uint256 _cap) public { require(_cap > 0); cap = _cap; } /** * @dev Function to mint tokens * @param _to The address that will receive the minted tokens. * @param _amount The amount of tokens to mint. * @return A boolean that indicates if the operation was successful. */ function mint(address _to, uint256 _amount) onlyOwner canMint public returns (bool) { require(totalSupply_.add(_amount) <= cap); return super.mint(_to, _amount); } } /** * @title Pausable * @dev Base contract which allows children to implement an emergency stop mechanism. */ contract Pausable is Ownable { event Pause(); event Unpause(); bool public paused = false; /** * @dev Modifier to make a function callable only when the contract is not paused. */ modifier whenNotPaused() { require(!paused); _; } /** * @dev Modifier to make a function callable only when the contract is paused. */ modifier whenPaused() { require(paused); _; } /** * @dev called by the owner to pause, triggers stopped state */ function pause() onlyOwner whenNotPaused public { paused = true; emit Pause(); } /** * @dev called by the owner to unpause, returns to normal state */ function unpause() onlyOwner whenPaused public { paused = false; emit Unpause(); } } contract PausableToken is StandardToken, Pausable { function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) { return super.transfer(_to, _value); } function transferFrom(address _from, address _to, uint256 _value) public whenNotPaused returns (bool) { return super.transferFrom(_from, _to, _value); } function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) { return super.approve(_spender, _value); } function increaseApproval(address _spender, uint _addedValue) public whenNotPaused returns (bool success) { return super.increaseApproval(_spender, _addedValue); } function decreaseApproval(address _spender, uint _subtractedValue) public whenNotPaused returns (bool success) { return super.decreaseApproval(_spender, _subtractedValue); } } contract ERC827 is ERC20 { function approve( address _spender, uint256 _value, bytes _data ) public returns (bool); function transfer( address _to, uint256 _value, bytes _data ) public returns (bool); function transferFrom( address _from, address _to, uint256 _value, bytes _data ) public returns (bool); } contract ERC827Token is ERC827, StandardToken { function approve(address _spender, uint256 _value, bytes _data) public returns (bool) { require(_spender != address(this)); super.approve(_spender, _value); require(_spender.call(_data)); return true; } function transfer(address _to, uint256 _value, bytes _data) public returns (bool) { require(_to != address(this)); super.transfer(_to, _value); require(_to.call(_data)); return true; } function transferFrom( address _from, address _to, uint256 _value, bytes _data ) public returns (bool) { require(_to != address(this)); super.transferFrom(_from, _to, _value); require(_to.call(_data)); return true; } function increaseApproval(address _spender, uint _addedValue, bytes _data) public returns (bool) { require(_spender != address(this)); super.increaseApproval(_spender, _addedValue); require(_spender.call(_data)); return true; } function decreaseApproval(address _spender, uint _subtractedValue, bytes _data) public returns (bool) { require(_spender != address(this)); super.decreaseApproval(_spender, _subtractedValue); require(_spender.call(_data)); return true; } } contract KRWT is StandardToken, MintableToken, BurnableToken, PausableToken, ERC827Token { string constant public name = "Korean Won"; string constant public symbol = "KRWT"; uint8 constant public decimals = 8; uint public totalSupply = 100000000000 * 10**uint(decimals); mapping (address => uint256) public balanceOf; mapping (address => mapping (address => uint256)) public allowance; /* This generates a public event on the blockchain that will notify clients */ event Transfer(address indexed from, address indexed to, uint256 value); /* This notifies clients about the amount burnt */ event Burn(address indexed from, uint256 value); uint256 public constant INITIAL_SUPPLY = 100000000000 * (10 ** uint256(decimals)); function KWRT () public { totalSupply_ = INITIAL_SUPPLY; balances[msg.sender] = INITIAL_SUPPLY; emit Transfer(0x0, msg.sender, INITIAL_SUPPLY); } }
True
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/** *Submitted for verification at Etherscan.io on 2021-01-16 */ pragma solidity ^0.6.0; abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; return msg.data; } } pragma solidity ^0.6.0; interface IERC20 { function totalSupply() external view returns (uint256); function balanceOf(address account) external view returns (uint256); function transfer(address recipient, uint256 amount) external returns (bool); function allowance(address owner, address spender) external view returns (uint256); function approve(address spender, uint256 amount) external returns (bool); function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); event Approval(address indexed owner, address indexed spender, uint256 value); } pragma solidity ^0.6.0; library SafeMath { function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; return c; } function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } pragma solidity ^0.6.2; library Address { function isContract(address account) internal view returns (bool) { bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { if (returndata.length > 0) { assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } pragma solidity ^0.6.0; contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); constructor () internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } function owner() public view returns (address) { return _owner; } modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } pragma solidity ^0.6.2; contract INFINI is Context, IERC20, Ownable { using SafeMath for uint256; using Address for address; mapping (address => uint256) private _rOwned; mapping (address => uint256) private _tOwned; mapping (address => mapping (address => uint256)) private _allowances; mapping (address => bool) private _isExcluded; address[] private _excluded; uint256 private constant MAX = ~uint256(0); uint256 private constant _tTotal = 1.5 * 10**4 * 10**9; uint256 private _rTotal = (MAX - (MAX % _tTotal)); uint256 private _tFeeTotal; string private _name = 'INFINI.CASH'; string private _symbol = 'IC$♾️'; uint8 private _decimals = 9; constructor () public { _rOwned[_msgSender()] = _rTotal; emit Transfer(address(0), _msgSender(), _tTotal); } function name() public view returns (string memory) { return _name; } function symbol() public view returns (string memory) { return _symbol; } function decimals() public view returns (uint8) { return _decimals; } function totalSupply() public view override returns (uint256) { return _tTotal; } function balanceOf(address account) public view override returns (uint256) { if (_isExcluded[account]) return _tOwned[account]; return tokenFromReflection(_rOwned[account]); } function transfer(address recipient, uint256 amount) public override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } function allowance(address owner, address spender) public view override returns (uint256) { return _allowances[owner][spender]; } function approve(address spender, uint256 amount) public override returns (bool) { _approve(_msgSender(), spender, amount); return true; } function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } function isExcluded(address account) public view returns (bool) { return _isExcluded[account]; } function totalFees() public view returns (uint256) { return _tFeeTotal; } function reflect(uint256 tAmount) public { address sender = _msgSender(); require(!_isExcluded[sender], "Excluded addresses cannot call this function"); (uint256 rAmount,,,,) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rTotal = _rTotal.sub(rAmount); _tFeeTotal = _tFeeTotal.add(tAmount); } function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) { require(tAmount <= _tTotal, "Amount must be less than supply"); if (!deductTransferFee) { (uint256 rAmount,,,,) = _getValues(tAmount); return rAmount; } else { (,uint256 rTransferAmount,,,) = _getValues(tAmount); return rTransferAmount; } } function tokenFromReflection(uint256 rAmount) public view returns(uint256) { require(rAmount <= _rTotal, "Amount must be less than total reflections"); uint256 currentRate = _getRate(); return rAmount.div(currentRate); } function excludeAccount(address account) external onlyOwner() { require(!_isExcluded[account], "Account is already excluded"); if(_rOwned[account] > 0) { _tOwned[account] = tokenFromReflection(_rOwned[account]); } _isExcluded[account] = true; _excluded.push(account); } function includeAccount(address account) external onlyOwner() { require(_isExcluded[account], "Account is already excluded"); for (uint256 i = 0; i < _excluded.length; i++) { if (_excluded[i] == account) { _excluded[i] = _excluded[_excluded.length - 1]; _tOwned[account] = 0; _isExcluded[account] = false; _excluded.pop(); break; } } } function _approve(address owner, address spender, uint256 amount) private { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } function _transfer(address sender, address recipient, uint256 amount) private { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); require(amount > 0, "Transfer amount must be greater than zero"); if (_isExcluded[sender] && !_isExcluded[recipient]) { _transferFromExcluded(sender, recipient, amount); } else if (!_isExcluded[sender] && _isExcluded[recipient]) { _transferToExcluded(sender, recipient, amount); } else if (!_isExcluded[sender] && !_isExcluded[recipient]) { _transferStandard(sender, recipient, amount); } else if (_isExcluded[sender] && _isExcluded[recipient]) { _transferBothExcluded(sender, recipient, amount); } else { _transferStandard(sender, recipient, amount); } } function _transferStandard(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function _transferToExcluded(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount); _tOwned[sender] = _tOwned[sender].sub(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount); _tOwned[sender] = _tOwned[sender].sub(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function _reflectFee(uint256 rFee, uint256 tFee) private { _rTotal = _rTotal.sub(rFee); _tFeeTotal = _tFeeTotal.add(tFee); } function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256) { (uint256 tTransferAmount, uint256 tFee) = _getTValues(tAmount); uint256 currentRate = _getRate(); (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, currentRate); return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee); } function _getTValues(uint256 tAmount) private pure returns (uint256, uint256) { uint256 tFee = tAmount.mul(7).div(100); uint256 tTransferAmount = tAmount.sub(tFee); return (tTransferAmount, tFee); } function _getRValues(uint256 tAmount, uint256 tFee, uint256 currentRate) private pure returns (uint256, uint256, uint256) { uint256 rAmount = tAmount.mul(currentRate); uint256 rFee = tFee.mul(currentRate); uint256 rTransferAmount = rAmount.sub(rFee); return (rAmount, rTransferAmount, rFee); } function _getRate() private view returns(uint256) { (uint256 rSupply, uint256 tSupply) = _getCurrentSupply(); return rSupply.div(tSupply); } function _getCurrentSupply() private view returns(uint256, uint256) { uint256 rSupply = _rTotal; uint256 tSupply = _tTotal; for (uint256 i = 0; i < _excluded.length; i++) { if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal); rSupply = rSupply.sub(_rOwned[_excluded[i]]); tSupply = tSupply.sub(_tOwned[_excluded[i]]); } if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal); return (rSupply, tSupply); } }
True
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pragma solidity >=0.4.25; contract OraclizeI { address public cbAddress; function query(uint _timestamp, string _datasource, string _arg) external payable returns (bytes32 _id); function query_withGasLimit(uint _timestamp, string _datasource, string _arg, uint _gaslimit) external payable returns (bytes32 _id); function query2(uint _timestamp, string _datasource, string _arg1, string _arg2) public payable returns (bytes32 _id); function query2_withGasLimit(uint _timestamp, string _datasource, string _arg1, string _arg2, uint _gaslimit) external payable returns (bytes32 _id); function queryN(uint _timestamp, string _datasource, bytes _argN) public payable returns (bytes32 _id); function queryN_withGasLimit(uint _timestamp, string _datasource, bytes _argN, uint _gaslimit) external payable returns (bytes32 _id); function getPrice(string _datasource) public returns (uint _dsprice); function getPrice(string _datasource, uint gaslimit) public returns (uint _dsprice); function setProofType(byte _proofType) external; function setCustomGasPrice(uint _gasPrice) external; function randomDS_getSessionPubKeyHash() external constant returns(bytes32); } contract OraclizeAddrResolverI { function getAddress() public returns (address _addr); } library Buffer { struct buffer { bytes buf; uint capacity; } function init(buffer memory buf, uint _capacity) internal pure { uint capacity = _capacity; if(capacity % 32 != 0) capacity += 32 - (capacity % 32); // Allocate space for the buffer data buf.capacity = capacity; assembly { let ptr := mload(0x40) mstore(buf, ptr) mstore(ptr, 0) mstore(0x40, add(ptr, capacity)) } } function resize(buffer memory buf, uint capacity) private pure { bytes memory oldbuf = buf.buf; init(buf, capacity); append(buf, oldbuf); } function max(uint a, uint b) private pure returns(uint) { if(a > b) { return a; } return b; } /** * @dev Appends a byte array to the end of the buffer. Resizes if doing so * would exceed the capacity of the buffer. * @param buf The buffer to append to. * @param data The data to append. * @return The original buffer. */ function append(buffer memory buf, bytes data) internal pure returns(buffer memory) { if(data.length + buf.buf.length > buf.capacity) { resize(buf, max(buf.capacity, data.length) * 2); } uint dest; uint src; uint len = data.length; assembly { // Memory address of the buffer data let bufptr := mload(buf) // Length of existing buffer data let buflen := mload(bufptr) // Start address = buffer address + buffer length + sizeof(buffer length) dest := add(add(bufptr, buflen), 32) // Update buffer length mstore(bufptr, add(buflen, mload(data))) src := add(data, 32) } // Copy word-length chunks while possible for(; len >= 32; len -= 32) { assembly { mstore(dest, mload(src)) } dest += 32; src += 32; } // Copy remaining bytes uint mask = 256 ** (32 - len) - 1; assembly { let srcpart := and(mload(src), not(mask)) let destpart := and(mload(dest), mask) mstore(dest, or(destpart, srcpart)) } return buf; } /** * @dev Appends a byte to the end of the buffer. Resizes if doing so would * exceed the capacity of the buffer. * @param buf The buffer to append to. * @param data The data to append. * @return The original buffer. */ function append(buffer memory buf, uint8 data) internal pure { if(buf.buf.length + 1 > buf.capacity) { resize(buf, buf.capacity * 2); } assembly { // Memory address of the buffer data let bufptr := mload(buf) // Length of existing buffer data let buflen := mload(bufptr) // Address = buffer address + buffer length + sizeof(buffer length) let dest := add(add(bufptr, buflen), 32) mstore8(dest, data) // Update buffer length mstore(bufptr, add(buflen, 1)) } } /** * @dev Appends a byte to the end of the buffer. Resizes if doing so would * exceed the capacity of the buffer. * @param buf The buffer to append to. * @param data The data to append. * @return The original buffer. */ function appendInt(buffer memory buf, uint data, uint len) internal pure returns(buffer memory) { if(len + buf.buf.length > buf.capacity) { resize(buf, max(buf.capacity, len) * 2); } uint mask = 256 ** len - 1; assembly { // Memory address of the buffer data let bufptr := mload(buf) // Length of existing buffer data let buflen := mload(bufptr) // Address = buffer address + buffer length + sizeof(buffer length) + len let dest := add(add(bufptr, buflen), len) mstore(dest, or(and(mload(dest), not(mask)), data)) // Update buffer length mstore(bufptr, add(buflen, len)) } return buf; } } library CBOR { using Buffer for Buffer.buffer; uint8 private constant MAJOR_TYPE_INT = 0; uint8 private constant MAJOR_TYPE_NEGATIVE_INT = 1; uint8 private constant MAJOR_TYPE_BYTES = 2; uint8 private constant MAJOR_TYPE_STRING = 3; uint8 private constant MAJOR_TYPE_ARRAY = 4; uint8 private constant MAJOR_TYPE_MAP = 5; uint8 private constant MAJOR_TYPE_CONTENT_FREE = 7; function encodeType(Buffer.buffer memory buf, uint8 major, uint value) private pure { if(value <= 23) { buf.append(uint8((major << 5) | value)); } else if(value <= 0xFF) { buf.append(uint8((major << 5) | 24)); buf.appendInt(value, 1); } else if(value <= 0xFFFF) { buf.append(uint8((major << 5) | 25)); buf.appendInt(value, 2); } else if(value <= 0xFFFFFFFF) { buf.append(uint8((major << 5) | 26)); buf.appendInt(value, 4); } else if(value <= 0xFFFFFFFFFFFFFFFF) { buf.append(uint8((major << 5) | 27)); buf.appendInt(value, 8); } } function encodeIndefiniteLengthType(Buffer.buffer memory buf, uint8 major) private pure { buf.append(uint8((major << 5) | 31)); } function encodeUInt(Buffer.buffer memory buf, uint value) internal pure { encodeType(buf, MAJOR_TYPE_INT, value); } function encodeInt(Buffer.buffer memory buf, int value) internal pure { if(value >= 0) { encodeType(buf, MAJOR_TYPE_INT, uint(value)); } else { encodeType(buf, MAJOR_TYPE_NEGATIVE_INT, uint(-1 - value)); } } function encodeBytes(Buffer.buffer memory buf, bytes value) internal pure { encodeType(buf, MAJOR_TYPE_BYTES, value.length); buf.append(value); } function encodeString(Buffer.buffer memory buf, string value) internal pure { encodeType(buf, MAJOR_TYPE_STRING, bytes(value).length); buf.append(bytes(value)); } function startArray(Buffer.buffer memory buf) internal pure { encodeIndefiniteLengthType(buf, MAJOR_TYPE_ARRAY); } function startMap(Buffer.buffer memory buf) internal pure { encodeIndefiniteLengthType(buf, MAJOR_TYPE_MAP); } function endSequence(Buffer.buffer memory buf) internal pure { encodeIndefiniteLengthType(buf, MAJOR_TYPE_CONTENT_FREE); } } /* End solidity-cborutils */ contract usingOraclize { uint constant day = 60*60*24; uint constant week = 60*60*24*7; uint constant month = 60*60*24*30; byte constant proofType_NONE = 0x00; byte constant proofType_TLSNotary = 0x10; byte constant proofType_Ledger = 0x30; byte constant proofType_Android = 0x40; byte constant proofType_Native = 0xF0; byte constant proofStorage_IPFS = 0x01; uint8 constant networkID_auto = 0; uint8 constant networkID_mainnet = 1; uint8 constant networkID_testnet = 2; uint8 constant networkID_morden = 2; uint8 constant networkID_consensys = 161; OraclizeAddrResolverI OAR; OraclizeI oraclize; modifier oraclizeAPI { if((address(OAR)==0)||(getCodeSize(address(OAR))==0)) oraclize_setNetwork(networkID_auto); if(address(oraclize) != OAR.getAddress()) oraclize = OraclizeI(OAR.getAddress()); _; } modifier coupon(string code){ oraclize = OraclizeI(OAR.getAddress()); _; } function oraclize_setNetwork(uint8 networkID) internal returns(bool){ return oraclize_setNetwork(); networkID; // silence the warning and remain backwards compatible } function oraclize_setNetwork() internal returns(bool){ if (getCodeSize(0x1d3B2638a7cC9f2CB3D298A3DA7a90B67E5506ed)>0){ //mainnet OAR = OraclizeAddrResolverI(0x1d3B2638a7cC9f2CB3D298A3DA7a90B67E5506ed); oraclize_setNetworkName("eth_mainnet"); return true; } if (getCodeSize(0xc03A2615D5efaf5F49F60B7BB6583eaec212fdf1)>0){ //ropsten testnet OAR = OraclizeAddrResolverI(0xc03A2615D5efaf5F49F60B7BB6583eaec212fdf1); oraclize_setNetworkName("eth_ropsten3"); return true; } if (getCodeSize(0xB7A07BcF2Ba2f2703b24C0691b5278999C59AC7e)>0){ //kovan testnet OAR = OraclizeAddrResolverI(0xB7A07BcF2Ba2f2703b24C0691b5278999C59AC7e); oraclize_setNetworkName("eth_kovan"); return true; } if (getCodeSize(0x146500cfd35B22E4A392Fe0aDc06De1a1368Ed48)>0){ //rinkeby testnet OAR = OraclizeAddrResolverI(0x146500cfd35B22E4A392Fe0aDc06De1a1368Ed48); oraclize_setNetworkName("eth_rinkeby"); return true; } if (getCodeSize(0x6f485C8BF6fc43eA212E93BBF8ce046C7f1cb475)>0){ //ethereum-bridge OAR = OraclizeAddrResolverI(0x6f485C8BF6fc43eA212E93BBF8ce046C7f1cb475); return true; } if (getCodeSize(0x20e12A1F859B3FeaE5Fb2A0A32C18F5a65555bBF)>0){ //ether.camp ide OAR = OraclizeAddrResolverI(0x20e12A1F859B3FeaE5Fb2A0A32C18F5a65555bBF); return true; } if (getCodeSize(0x51efaF4c8B3C9AfBD5aB9F4bbC82784Ab6ef8fAA)>0){ //browser-solidity OAR = OraclizeAddrResolverI(0x51efaF4c8B3C9AfBD5aB9F4bbC82784Ab6ef8fAA); return true; } return false; } function __callback(bytes32 myid, string result) public { __callback(myid, result, new bytes(0)); } function __callback(bytes32 myid, string result, bytes proof) public { return; myid; result; proof; // Silence compiler warnings } function oraclize_getPrice(string datasource) oraclizeAPI internal returns (uint){ return oraclize.getPrice(datasource); } function oraclize_getPrice(string datasource, uint gaslimit) oraclizeAPI internal returns (uint){ return oraclize.getPrice(datasource, gaslimit); } function oraclize_query(string datasource, string arg) oraclizeAPI internal returns (bytes32 id){ uint price = oraclize.getPrice(datasource); if (price > 1 ether + tx.gasprice*200000) return 0; // unexpectedly high price return oraclize.query.value(price)(0, datasource, arg); } function oraclize_query(uint timestamp, string datasource, string arg) oraclizeAPI internal returns (bytes32 id){ uint price = oraclize.getPrice(datasource); if (price > 1 ether + tx.gasprice*200000) return 0; // unexpectedly high price return oraclize.query.value(price)(timestamp, datasource, arg); } function oraclize_query(uint timestamp, string datasource, string arg, uint gaslimit) oraclizeAPI internal returns (bytes32 id){ uint price = oraclize.getPrice(datasource, gaslimit); if (price > 1 ether + tx.gasprice*gaslimit) return 0; // unexpectedly high price return oraclize.query_withGasLimit.value(price)(timestamp, datasource, arg, gaslimit); } function oraclize_query(string datasource, string arg, uint gaslimit) oraclizeAPI internal returns (bytes32 id){ uint price = oraclize.getPrice(datasource, gaslimit); if (price > 1 ether + tx.gasprice*gaslimit) return 0; // unexpectedly high price return oraclize.query_withGasLimit.value(price)(0, datasource, arg, gaslimit); } function oraclize_query(string datasource, string arg1, string arg2) oraclizeAPI internal returns (bytes32 id){ uint price = oraclize.getPrice(datasource); if (price > 1 ether + tx.gasprice*200000) return 0; // unexpectedly high price return oraclize.query2.value(price)(0, datasource, arg1, arg2); } function oraclize_query(uint timestamp, string datasource, string arg1, string arg2) oraclizeAPI internal returns (bytes32 id){ uint price = oraclize.getPrice(datasource); if (price > 1 ether + tx.gasprice*200000) return 0; // unexpectedly high price return oraclize.query2.value(price)(timestamp, datasource, arg1, arg2); } function oraclize_query(uint timestamp, string datasource, string arg1, string arg2, uint gaslimit) oraclizeAPI internal returns (bytes32 id){ uint price = oraclize.getPrice(datasource, gaslimit); if (price > 1 ether + tx.gasprice*gaslimit) return 0; // unexpectedly high price return oraclize.query2_withGasLimit.value(price)(timestamp, datasource, arg1, arg2, gaslimit); } function oraclize_query(string datasource, string arg1, string arg2, uint gaslimit) oraclizeAPI internal returns (bytes32 id){ uint price = oraclize.getPrice(datasource, gaslimit); if (price > 1 ether + tx.gasprice*gaslimit) return 0; // unexpectedly high price return oraclize.query2_withGasLimit.value(price)(0, datasource, arg1, arg2, gaslimit); } function oraclize_query(string datasource, string[] argN) oraclizeAPI internal returns (bytes32 id){ uint price = oraclize.getPrice(datasource); if (price > 1 ether + tx.gasprice*200000) return 0; // unexpectedly high price bytes memory args = stra2cbor(argN); return oraclize.queryN.value(price)(0, datasource, args); } function oraclize_query(uint timestamp, string datasource, string[] argN) oraclizeAPI internal returns (bytes32 id){ uint price = oraclize.getPrice(datasource); if (price > 1 ether + tx.gasprice*200000) return 0; // unexpectedly high price bytes memory args = stra2cbor(argN); return oraclize.queryN.value(price)(timestamp, datasource, args); } function oraclize_query(uint timestamp, string datasource, string[] argN, uint gaslimit) oraclizeAPI internal returns (bytes32 id){ uint price = oraclize.getPrice(datasource, gaslimit); if (price > 1 ether + tx.gasprice*gaslimit) return 0; // unexpectedly high price bytes memory args = stra2cbor(argN); return oraclize.queryN_withGasLimit.value(price)(timestamp, datasource, args, gaslimit); } function oraclize_query(string datasource, string[] argN, uint gaslimit) oraclizeAPI internal returns (bytes32 id){ uint price = oraclize.getPrice(datasource, gaslimit); if (price > 1 ether + tx.gasprice*gaslimit) return 0; // unexpectedly high price bytes memory args = stra2cbor(argN); return oraclize.queryN_withGasLimit.value(price)(0, datasource, args, gaslimit); } function oraclize_query(string datasource, string[1] args) oraclizeAPI internal returns (bytes32 id) { string[] memory dynargs = new string[](1); dynargs[0] = args[0]; return oraclize_query(datasource, dynargs); } function oraclize_query(uint timestamp, string datasource, string[1] args) oraclizeAPI internal returns (bytes32 id) { string[] memory dynargs = new string[](1); dynargs[0] = args[0]; return oraclize_query(timestamp, datasource, dynargs); } function oraclize_query(uint timestamp, string datasource, string[1] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) { string[] memory dynargs = new string[](1); dynargs[0] = args[0]; return oraclize_query(timestamp, datasource, dynargs, gaslimit); } function oraclize_query(string datasource, string[1] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) { string[] memory dynargs = new string[](1); dynargs[0] = args[0]; return oraclize_query(datasource, dynargs, gaslimit); } function oraclize_query(string datasource, string[2] args) oraclizeAPI internal returns (bytes32 id) { string[] memory dynargs = new string[](2); dynargs[0] = args[0]; dynargs[1] = args[1]; return oraclize_query(datasource, dynargs); } function oraclize_query(uint timestamp, string datasource, string[2] args) oraclizeAPI internal returns (bytes32 id) { string[] memory dynargs = new string[](2); dynargs[0] = args[0]; dynargs[1] = args[1]; return oraclize_query(timestamp, datasource, dynargs); } function oraclize_query(uint timestamp, string datasource, string[2] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) { string[] memory dynargs = new string[](2); dynargs[0] = args[0]; dynargs[1] = args[1]; return oraclize_query(timestamp, datasource, dynargs, gaslimit); } function oraclize_query(string datasource, string[2] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) { string[] memory dynargs = new string[](2); dynargs[0] = args[0]; dynargs[1] = args[1]; return oraclize_query(datasource, dynargs, gaslimit); } function oraclize_query(string datasource, string[3] args) oraclizeAPI internal returns (bytes32 id) { string[] memory dynargs = new string[](3); dynargs[0] = args[0]; dynargs[1] = args[1]; dynargs[2] = args[2]; return oraclize_query(datasource, dynargs); } function oraclize_query(uint timestamp, string datasource, string[3] args) oraclizeAPI internal returns (bytes32 id) { string[] memory dynargs = new string[](3); dynargs[0] = args[0]; dynargs[1] = args[1]; dynargs[2] = args[2]; return oraclize_query(timestamp, datasource, dynargs); } function oraclize_query(uint timestamp, string datasource, string[3] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) { string[] memory dynargs = new string[](3); dynargs[0] = args[0]; dynargs[1] = args[1]; dynargs[2] = args[2]; return oraclize_query(timestamp, datasource, dynargs, gaslimit); } function oraclize_query(string datasource, string[3] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) { string[] memory dynargs = new string[](3); dynargs[0] = args[0]; dynargs[1] = args[1]; dynargs[2] = args[2]; return oraclize_query(datasource, dynargs, gaslimit); } function oraclize_query(string datasource, string[4] args) oraclizeAPI internal returns (bytes32 id) { string[] memory dynargs = new string[](4); dynargs[0] = args[0]; dynargs[1] = args[1]; dynargs[2] = args[2]; dynargs[3] = args[3]; return oraclize_query(datasource, dynargs); } function oraclize_query(uint timestamp, string datasource, string[4] args) oraclizeAPI internal returns (bytes32 id) { string[] memory dynargs = new string[](4); dynargs[0] = args[0]; dynargs[1] = args[1]; dynargs[2] = args[2]; dynargs[3] = args[3]; return oraclize_query(timestamp, datasource, dynargs); } function oraclize_query(uint timestamp, string datasource, string[4] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) { string[] memory dynargs = new string[](4); dynargs[0] = args[0]; dynargs[1] = args[1]; dynargs[2] = args[2]; dynargs[3] = args[3]; return oraclize_query(timestamp, datasource, dynargs, gaslimit); } function oraclize_query(string datasource, string[4] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) { string[] memory dynargs = new string[](4); dynargs[0] = args[0]; dynargs[1] = args[1]; dynargs[2] = args[2]; dynargs[3] = args[3]; return oraclize_query(datasource, dynargs, gaslimit); } function oraclize_query(string datasource, string[5] args) oraclizeAPI internal returns (bytes32 id) { string[] memory dynargs = new string[](5); dynargs[0] = args[0]; dynargs[1] = args[1]; dynargs[2] = args[2]; dynargs[3] = args[3]; dynargs[4] = args[4]; return oraclize_query(datasource, dynargs); } function oraclize_query(uint timestamp, string datasource, string[5] args) oraclizeAPI internal returns (bytes32 id) { string[] memory dynargs = new string[](5); dynargs[0] = args[0]; dynargs[1] = args[1]; dynargs[2] = args[2]; dynargs[3] = args[3]; dynargs[4] = args[4]; return oraclize_query(timestamp, datasource, dynargs); } function oraclize_query(uint timestamp, string datasource, string[5] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) { string[] memory dynargs = new string[](5); dynargs[0] = args[0]; dynargs[1] = args[1]; dynargs[2] = args[2]; dynargs[3] = args[3]; dynargs[4] = args[4]; return oraclize_query(timestamp, datasource, dynargs, gaslimit); } function oraclize_query(string datasource, string[5] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) { string[] memory dynargs = new string[](5); dynargs[0] = args[0]; dynargs[1] = args[1]; dynargs[2] = args[2]; dynargs[3] = args[3]; dynargs[4] = args[4]; return oraclize_query(datasource, dynargs, gaslimit); } function oraclize_query(string datasource, bytes[] argN) oraclizeAPI internal returns (bytes32 id){ uint price = oraclize.getPrice(datasource); if (price > 1 ether + tx.gasprice*200000) return 0; // unexpectedly high price bytes memory args = ba2cbor(argN); return oraclize.queryN.value(price)(0, datasource, args); } function oraclize_query(uint timestamp, string datasource, bytes[] argN) oraclizeAPI internal returns (bytes32 id){ uint price = oraclize.getPrice(datasource); if (price > 1 ether + tx.gasprice*200000) return 0; // unexpectedly high price bytes memory args = ba2cbor(argN); return oraclize.queryN.value(price)(timestamp, datasource, args); } function oraclize_query(uint timestamp, string datasource, bytes[] argN, uint gaslimit) oraclizeAPI internal returns (bytes32 id){ uint price = oraclize.getPrice(datasource, gaslimit); if (price > 1 ether + tx.gasprice*gaslimit) return 0; // unexpectedly high price bytes memory args = ba2cbor(argN); return oraclize.queryN_withGasLimit.value(price)(timestamp, datasource, args, gaslimit); } function oraclize_query(string datasource, bytes[] argN, uint gaslimit) oraclizeAPI internal returns (bytes32 id){ uint price = oraclize.getPrice(datasource, gaslimit); if (price > 1 ether + tx.gasprice*gaslimit) return 0; // unexpectedly high price bytes memory args = ba2cbor(argN); return oraclize.queryN_withGasLimit.value(price)(0, datasource, args, gaslimit); } function oraclize_query(string datasource, bytes[1] args) oraclizeAPI internal returns (bytes32 id) { bytes[] memory dynargs = new bytes[](1); dynargs[0] = args[0]; return oraclize_query(datasource, dynargs); } function oraclize_query(uint timestamp, string datasource, bytes[1] args) oraclizeAPI internal returns (bytes32 id) { bytes[] memory dynargs = new bytes[](1); dynargs[0] = args[0]; return oraclize_query(timestamp, datasource, dynargs); } function oraclize_query(uint timestamp, string datasource, bytes[1] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) { bytes[] memory dynargs = new bytes[](1); dynargs[0] = args[0]; return oraclize_query(timestamp, datasource, dynargs, gaslimit); } function oraclize_query(string datasource, bytes[1] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) { bytes[] memory dynargs = new bytes[](1); dynargs[0] = args[0]; return oraclize_query(datasource, dynargs, gaslimit); } function oraclize_query(string datasource, bytes[2] args) oraclizeAPI internal returns (bytes32 id) { bytes[] memory dynargs = new bytes[](2); dynargs[0] = args[0]; dynargs[1] = args[1]; return oraclize_query(datasource, dynargs); } function oraclize_query(uint timestamp, string datasource, bytes[2] args) oraclizeAPI internal returns (bytes32 id) { bytes[] memory dynargs = new bytes[](2); dynargs[0] = args[0]; dynargs[1] = args[1]; return oraclize_query(timestamp, datasource, dynargs); } function oraclize_query(uint timestamp, string datasource, bytes[2] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) { bytes[] memory dynargs = new bytes[](2); dynargs[0] = args[0]; dynargs[1] = args[1]; return oraclize_query(timestamp, datasource, dynargs, gaslimit); } function oraclize_query(string datasource, bytes[2] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) { bytes[] memory dynargs = new bytes[](2); dynargs[0] = args[0]; dynargs[1] = args[1]; return oraclize_query(datasource, dynargs, gaslimit); } function oraclize_query(string datasource, bytes[3] args) oraclizeAPI internal returns (bytes32 id) { bytes[] memory dynargs = new bytes[](3); dynargs[0] = args[0]; dynargs[1] = args[1]; dynargs[2] = args[2]; return oraclize_query(datasource, dynargs); } function oraclize_query(uint timestamp, string datasource, bytes[3] args) oraclizeAPI internal returns (bytes32 id) { bytes[] memory dynargs = new bytes[](3); dynargs[0] = args[0]; dynargs[1] = args[1]; dynargs[2] = args[2]; return oraclize_query(timestamp, datasource, dynargs); } function oraclize_query(uint timestamp, string datasource, bytes[3] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) { bytes[] memory dynargs = new bytes[](3); dynargs[0] = args[0]; dynargs[1] = args[1]; dynargs[2] = args[2]; return oraclize_query(timestamp, datasource, dynargs, gaslimit); } function oraclize_query(string datasource, bytes[3] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) { bytes[] memory dynargs = new bytes[](3); dynargs[0] = args[0]; dynargs[1] = args[1]; dynargs[2] = args[2]; return oraclize_query(datasource, dynargs, gaslimit); } function oraclize_query(string datasource, bytes[4] args) oraclizeAPI internal returns (bytes32 id) { bytes[] memory dynargs = new bytes[](4); dynargs[0] = args[0]; dynargs[1] = args[1]; dynargs[2] = args[2]; dynargs[3] = args[3]; return oraclize_query(datasource, dynargs); } function oraclize_query(uint timestamp, string datasource, bytes[4] args) oraclizeAPI internal returns (bytes32 id) { bytes[] memory dynargs = new bytes[](4); dynargs[0] = args[0]; dynargs[1] = args[1]; dynargs[2] = args[2]; dynargs[3] = args[3]; return oraclize_query(timestamp, datasource, dynargs); } function oraclize_query(uint timestamp, string datasource, bytes[4] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) { bytes[] memory dynargs = new bytes[](4); dynargs[0] = args[0]; dynargs[1] = args[1]; dynargs[2] = args[2]; dynargs[3] = args[3]; return oraclize_query(timestamp, datasource, dynargs, gaslimit); } function oraclize_query(string datasource, bytes[4] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) { bytes[] memory dynargs = new bytes[](4); dynargs[0] = args[0]; dynargs[1] = args[1]; dynargs[2] = args[2]; dynargs[3] = args[3]; return oraclize_query(datasource, dynargs, gaslimit); } function oraclize_query(string datasource, bytes[5] args) oraclizeAPI internal returns (bytes32 id) { bytes[] memory dynargs = new bytes[](5); dynargs[0] = args[0]; dynargs[1] = args[1]; dynargs[2] = args[2]; dynargs[3] = args[3]; dynargs[4] = args[4]; return oraclize_query(datasource, dynargs); } function oraclize_query(uint timestamp, string datasource, bytes[5] args) oraclizeAPI internal returns (bytes32 id) { bytes[] memory dynargs = new bytes[](5); dynargs[0] = args[0]; dynargs[1] = args[1]; dynargs[2] = args[2]; dynargs[3] = args[3]; dynargs[4] = args[4]; return oraclize_query(timestamp, datasource, dynargs); } function oraclize_query(uint timestamp, string datasource, bytes[5] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) { bytes[] memory dynargs = new bytes[](5); dynargs[0] = args[0]; dynargs[1] = args[1]; dynargs[2] = args[2]; dynargs[3] = args[3]; dynargs[4] = args[4]; return oraclize_query(timestamp, datasource, dynargs, gaslimit); } function oraclize_query(string datasource, bytes[5] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) { bytes[] memory dynargs = new bytes[](5); dynargs[0] = args[0]; dynargs[1] = args[1]; dynargs[2] = args[2]; dynargs[3] = args[3]; dynargs[4] = args[4]; return oraclize_query(datasource, dynargs, gaslimit); } function oraclize_cbAddress() oraclizeAPI internal returns (address){ return oraclize.cbAddress(); } function oraclize_setProof(byte proofP) oraclizeAPI internal { return oraclize.setProofType(proofP); } function oraclize_setCustomGasPrice(uint gasPrice) oraclizeAPI internal { return oraclize.setCustomGasPrice(gasPrice); } function oraclize_randomDS_getSessionPubKeyHash() oraclizeAPI internal returns (bytes32){ return oraclize.randomDS_getSessionPubKeyHash(); } function getCodeSize(address _addr) constant internal returns(uint _size) { assembly { _size := extcodesize(_addr) } } function parseAddr(string _a) internal pure returns (address){ bytes memory tmp = bytes(_a); uint160 iaddr = 0; uint160 b1; uint160 b2; for (uint i=2; i<2+2*20; i+=2){ iaddr *= 256; b1 = uint160(tmp[i]); b2 = uint160(tmp[i+1]); if ((b1 >= 97)&&(b1 <= 102)) b1 -= 87; else if ((b1 >= 65)&&(b1 <= 70)) b1 -= 55; else if ((b1 >= 48)&&(b1 <= 57)) b1 -= 48; if ((b2 >= 97)&&(b2 <= 102)) b2 -= 87; else if ((b2 >= 65)&&(b2 <= 70)) b2 -= 55; else if ((b2 >= 48)&&(b2 <= 57)) b2 -= 48; iaddr += (b1*16+b2); } return address(iaddr); } function strCompare(string _a, string _b) internal pure returns (int) { bytes memory a = bytes(_a); bytes memory b = bytes(_b); uint minLength = a.length; if (b.length < minLength) minLength = b.length; for (uint i = 0; i < minLength; i ++) if (a[i] < b[i]) return -1; else if (a[i] > b[i]) return 1; if (a.length < b.length) return -1; else if (a.length > b.length) return 1; else return 0; } function indexOf(string _haystack, string _needle) internal pure returns (int) { bytes memory h = bytes(_haystack); bytes memory n = bytes(_needle); if(h.length < 1 || n.length < 1 || (n.length > h.length)) return -1; else if(h.length > (2**128 -1)) return -1; else { uint subindex = 0; for (uint i = 0; i < h.length; i ++) { if (h[i] == n[0]) { subindex = 1; while(subindex < n.length && (i + subindex) < h.length && h[i + subindex] == n[subindex]) { subindex++; } if(subindex == n.length) return int(i); } } return -1; } } function strConcat(string _a, string _b, string _c, string _d, string _e) internal pure returns (string) { bytes memory _ba = bytes(_a); bytes memory _bb = bytes(_b); bytes memory _bc = bytes(_c); bytes memory _bd = bytes(_d); bytes memory _be = bytes(_e); string memory abcde = new string(_ba.length + _bb.length + _bc.length + _bd.length + _be.length); bytes memory babcde = bytes(abcde); uint k = 0; for (uint i = 0; i < _ba.length; i++) babcde[k++] = _ba[i]; for (i = 0; i < _bb.length; i++) babcde[k++] = _bb[i]; for (i = 0; i < _bc.length; i++) babcde[k++] = _bc[i]; for (i = 0; i < _bd.length; i++) babcde[k++] = _bd[i]; for (i = 0; i < _be.length; i++) babcde[k++] = _be[i]; return string(babcde); } function strConcat(string _a, string _b, string _c, string _d) internal pure returns (string) { return strConcat(_a, _b, _c, _d, ""); } function strConcat(string _a, string _b, string _c) internal pure returns (string) { return strConcat(_a, _b, _c, "", ""); } function strConcat(string _a, string _b) internal pure returns (string) { return strConcat(_a, _b, "", "", ""); } // parseInt function parseInt(string _a) internal pure returns (uint) { return parseInt(_a, 0); } // parseInt(parseFloat*10^_b) function parseInt(string _a, uint _b) internal pure returns (uint) { bytes memory bresult = bytes(_a); uint mint = 0; bool decimals = false; for (uint i=0; i<bresult.length; i++){ if ((bresult[i] >= 48)&&(bresult[i] <= 57)){ if (decimals){ if (_b == 0) break; else _b--; } mint *= 10; mint += uint(bresult[i]) - 48; } else if (bresult[i] == 46) decimals = true; } if (_b > 0) mint *= 10**_b; return mint; } function uint2str(uint i) internal pure returns (string){ if (i == 0) return "0"; uint j = i; uint len; while (j != 0){ len++; j /= 10; } bytes memory bstr = new bytes(len); uint k = len - 1; while (i != 0){ bstr[k--] = byte(48 + i % 10); i /= 10; } return string(bstr); } using CBOR for Buffer.buffer; function stra2cbor(string[] arr) internal pure returns (bytes) { safeMemoryCleaner(); Buffer.buffer memory buf; Buffer.init(buf, 1024); buf.startArray(); for (uint i = 0; i < arr.length; i++) { buf.encodeString(arr[i]); } buf.endSequence(); return buf.buf; } function ba2cbor(bytes[] arr) internal pure returns (bytes) { safeMemoryCleaner(); Buffer.buffer memory buf; Buffer.init(buf, 1024); buf.startArray(); for (uint i = 0; i < arr.length; i++) { buf.encodeBytes(arr[i]); } buf.endSequence(); return buf.buf; } string oraclize_network_name; function oraclize_setNetworkName(string _network_name) internal { oraclize_network_name = _network_name; } function oraclize_getNetworkName() internal view returns (string) { return oraclize_network_name; } function oraclize_newRandomDSQuery(uint _delay, uint _nbytes, uint _customGasLimit) internal returns (bytes32){ require((_nbytes > 0) && (_nbytes <= 32)); // Convert from seconds to ledger timer ticks _delay *= 10; bytes memory nbytes = new bytes(1); nbytes[0] = byte(_nbytes); bytes memory unonce = new bytes(32); bytes memory sessionKeyHash = new bytes(32); bytes32 sessionKeyHash_bytes32 = oraclize_randomDS_getSessionPubKeyHash(); assembly { mstore(unonce, 0x20) // the following variables can be relaxed // check relaxed random contract under ethereum-examples repo // for an idea on how to override and replace comit hash vars mstore(add(unonce, 0x20), xor(blockhash(sub(number, 1)), xor(coinbase, timestamp))) mstore(sessionKeyHash, 0x20) mstore(add(sessionKeyHash, 0x20), sessionKeyHash_bytes32) } bytes memory delay = new bytes(32); assembly { mstore(add(delay, 0x20), _delay) } bytes memory delay_bytes8 = new bytes(8); copyBytes(delay, 24, 8, delay_bytes8, 0); bytes[4] memory args = [unonce, nbytes, sessionKeyHash, delay]; bytes32 queryId = oraclize_query("random", args, _customGasLimit); bytes memory delay_bytes8_left = new bytes(8); assembly { let x := mload(add(delay_bytes8, 0x20)) mstore8(add(delay_bytes8_left, 0x27), div(x, 0x100000000000000000000000000000000000000000000000000000000000000)) mstore8(add(delay_bytes8_left, 0x26), div(x, 0x1000000000000000000000000000000000000000000000000000000000000)) mstore8(add(delay_bytes8_left, 0x25), div(x, 0x10000000000000000000000000000000000000000000000000000000000)) mstore8(add(delay_bytes8_left, 0x24), div(x, 0x100000000000000000000000000000000000000000000000000000000)) mstore8(add(delay_bytes8_left, 0x23), div(x, 0x1000000000000000000000000000000000000000000000000000000)) mstore8(add(delay_bytes8_left, 0x22), div(x, 0x10000000000000000000000000000000000000000000000000000)) mstore8(add(delay_bytes8_left, 0x21), div(x, 0x100000000000000000000000000000000000000000000000000)) mstore8(add(delay_bytes8_left, 0x20), div(x, 0x1000000000000000000000000000000000000000000000000)) } oraclize_randomDS_setCommitment(queryId, keccak256(delay_bytes8_left, args[1], sha256(args[0]), args[2])); return queryId; } function oraclize_randomDS_setCommitment(bytes32 queryId, bytes32 commitment) internal { oraclize_randomDS_args[queryId] = commitment; } mapping(bytes32=>bytes32) oraclize_randomDS_args; mapping(bytes32=>bool) oraclize_randomDS_sessionKeysHashVerified; function verifySig(bytes32 tosignh, bytes dersig, bytes pubkey) internal returns (bool){ bool sigok; address signer; bytes32 sigr; bytes32 sigs; bytes memory sigr_ = new bytes(32); uint offset = 4+(uint(dersig[3]) - 0x20); sigr_ = copyBytes(dersig, offset, 32, sigr_, 0); bytes memory sigs_ = new bytes(32); offset += 32 + 2; sigs_ = copyBytes(dersig, offset+(uint(dersig[offset-1]) - 0x20), 32, sigs_, 0); assembly { sigr := mload(add(sigr_, 32)) sigs := mload(add(sigs_, 32)) } (sigok, signer) = safer_ecrecover(tosignh, 27, sigr, sigs); if (address(keccak256(pubkey)) == signer) return true; else { (sigok, signer) = safer_ecrecover(tosignh, 28, sigr, sigs); return (address(keccak256(pubkey)) == signer); } } function oraclize_randomDS_proofVerify__sessionKeyValidity(bytes proof, uint sig2offset) internal returns (bool) { bool sigok; // Step 6: verify the attestation signature, APPKEY1 must sign the sessionKey from the correct ledger app (CODEHASH) bytes memory sig2 = new bytes(uint(proof[sig2offset+1])+2); copyBytes(proof, sig2offset, sig2.length, sig2, 0); bytes memory appkey1_pubkey = new bytes(64); copyBytes(proof, 3+1, 64, appkey1_pubkey, 0); bytes memory tosign2 = new bytes(1+65+32); tosign2[0] = byte(1); //role copyBytes(proof, sig2offset-65, 65, tosign2, 1); bytes memory CODEHASH = hex"fd94fa71bc0ba10d39d464d0d8f465efeef0a2764e3887fcc9df41ded20f505c"; copyBytes(CODEHASH, 0, 32, tosign2, 1+65); sigok = verifySig(sha256(tosign2), sig2, appkey1_pubkey); if (sigok == false) return false; // Step 7: verify the APPKEY1 provenance (must be signed by Ledger) bytes memory LEDGERKEY = hex"7fb956469c5c9b89840d55b43537e66a98dd4811ea0a27224272c2e5622911e8537a2f8e86a46baec82864e98dd01e9ccc2f8bc5dfc9cbe5a91a290498dd96e4"; bytes memory tosign3 = new bytes(1+65); tosign3[0] = 0xFE; copyBytes(proof, 3, 65, tosign3, 1); bytes memory sig3 = new bytes(uint(proof[3+65+1])+2); copyBytes(proof, 3+65, sig3.length, sig3, 0); sigok = verifySig(sha256(tosign3), sig3, LEDGERKEY); return sigok; } modifier oraclize_randomDS_proofVerify(bytes32 _queryId, string _result, bytes _proof) { // Step 1: the prefix has to match &#39;LP\x01&#39; (Ledger Proof version 1) require((_proof[0] == "L") && (_proof[1] == "P") && (_proof[2] == 1)); bool proofVerified = oraclize_randomDS_proofVerify__main(_proof, _queryId, bytes(_result), oraclize_getNetworkName()); require(proofVerified); _; } function oraclize_randomDS_proofVerify__returnCode(bytes32 _queryId, string _result, bytes _proof) internal returns (uint8){ // Step 1: the prefix has to match &#39;LP\x01&#39; (Ledger Proof version 1) if ((_proof[0] != "L")||(_proof[1] != "P")||(_proof[2] != 1)) return 1; bool proofVerified = oraclize_randomDS_proofVerify__main(_proof, _queryId, bytes(_result), oraclize_getNetworkName()); if (proofVerified == false) return 2; return 0; } function matchBytes32Prefix(bytes32 content, bytes prefix, uint n_random_bytes) internal pure returns (bool){ bool match_ = true; require(prefix.length == n_random_bytes); for (uint256 i=0; i< n_random_bytes; i++) { if (content[i] != prefix[i]) match_ = false; } return match_; } function oraclize_randomDS_proofVerify__main(bytes proof, bytes32 queryId, bytes result, string context_name) internal returns (bool){ // Step 2: the unique keyhash has to match with the sha256 of (context name + queryId) uint ledgerProofLength = 3+65+(uint(proof[3+65+1])+2)+32; bytes memory keyhash = new bytes(32); copyBytes(proof, ledgerProofLength, 32, keyhash, 0); if (!(keccak256(keyhash) == keccak256(sha256(context_name, queryId)))) return false; bytes memory sig1 = new bytes(uint(proof[ledgerProofLength+(32+8+1+32)+1])+2); copyBytes(proof, ledgerProofLength+(32+8+1+32), sig1.length, sig1, 0); // Step 3: we assume sig1 is valid (it will be verified during step 5) and we verify if &#39;result&#39; is the prefix of sha256(sig1) if (!matchBytes32Prefix(sha256(sig1), result, uint(proof[ledgerProofLength+32+8]))) return false; // Step 4: commitment match verification, keccak256(delay, nbytes, unonce, sessionKeyHash) == commitment in storage. // This is to verify that the computed args match with the ones specified in the query. bytes memory commitmentSlice1 = new bytes(8+1+32); copyBytes(proof, ledgerProofLength+32, 8+1+32, commitmentSlice1, 0); bytes memory sessionPubkey = new bytes(64); uint sig2offset = ledgerProofLength+32+(8+1+32)+sig1.length+65; copyBytes(proof, sig2offset-64, 64, sessionPubkey, 0); bytes32 sessionPubkeyHash = sha256(sessionPubkey); if (oraclize_randomDS_args[queryId] == keccak256(commitmentSlice1, sessionPubkeyHash)){ //unonce, nbytes and sessionKeyHash match delete oraclize_randomDS_args[queryId]; } else return false; // Step 5: validity verification for sig1 (keyhash and args signed with the sessionKey) bytes memory tosign1 = new bytes(32+8+1+32); copyBytes(proof, ledgerProofLength, 32+8+1+32, tosign1, 0); if (!verifySig(sha256(tosign1), sig1, sessionPubkey)) return false; // verify if sessionPubkeyHash was verified already, if not.. let&#39;s do it! if (oraclize_randomDS_sessionKeysHashVerified[sessionPubkeyHash] == false){ oraclize_randomDS_sessionKeysHashVerified[sessionPubkeyHash] = oraclize_randomDS_proofVerify__sessionKeyValidity(proof, sig2offset); } return oraclize_randomDS_sessionKeysHashVerified[sessionPubkeyHash]; } // the following function has been written by Alex Beregszaszi (@axic), use it under the terms of the MIT license function copyBytes(bytes from, uint fromOffset, uint length, bytes to, uint toOffset) internal pure returns (bytes) { uint minLength = length + toOffset; // Buffer too small require(to.length >= minLength); // Should be a better way? // NOTE: the offset 32 is added to skip the `size` field of both bytes variables uint i = 32 + fromOffset; uint j = 32 + toOffset; while (i < (32 + fromOffset + length)) { assembly { let tmp := mload(add(from, i)) mstore(add(to, j), tmp) } i += 32; j += 32; } return to; } // the following function has been written by Alex Beregszaszi (@axic), use it under the terms of the MIT license // Duplicate Solidity&#39;s ecrecover, but catching the CALL return value function safer_ecrecover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal returns (bool, address) { // We do our own memory management here. Solidity uses memory offset // 0x40 to store the current end of memory. We write past it (as // writes are memory extensions), but don&#39;t update the offset so // Solidity will reuse it. The memory used here is only needed for // this context. // FIXME: inline assembly can&#39;t access return values bool ret; address addr; assembly { let size := mload(0x40) mstore(size, hash) mstore(add(size, 32), v) mstore(add(size, 64), r) mstore(add(size, 96), s) // NOTE: we can reuse the request memory because we deal with // the return code ret := call(3000, 1, 0, size, 128, size, 32) addr := mload(size) } return (ret, addr); } // the following function has been written by Alex Beregszaszi (@axic), use it under the terms of the MIT license function ecrecovery(bytes32 hash, bytes sig) internal returns (bool, address) { bytes32 r; bytes32 s; uint8 v; if (sig.length != 65) return (false, 0); // The signature format is a compact form of: // {bytes32 r}{bytes32 s}{uint8 v} // Compact means, uint8 is not padded to 32 bytes. assembly { r := mload(add(sig, 32)) s := mload(add(sig, 64)) // Here we are loading the last 32 bytes. We exploit the fact that // &#39;mload&#39; will pad with zeroes if we overread. // There is no &#39;mload8&#39; to do this, but that would be nicer. v := byte(0, mload(add(sig, 96))) // Alternative solution: // &#39;byte&#39; is not working due to the Solidity parser, so lets // use the second best option, &#39;and&#39; // v := and(mload(add(sig, 65)), 255) } // albeit non-transactional signatures are not specified by the YP, one would expect it // to match the YP range of [27, 28] // // geth uses [0, 1] and some clients have followed. This might change, see: // https://github.com/ethereum/go-ethereum/issues/2053 if (v < 27) v += 27; if (v != 27 && v != 28) return (false, 0); return safer_ecrecover(hash, v, r, s); } function safeMemoryCleaner() internal pure { assembly { let fmem := mload(0x40) codecopy(fmem, codesize, sub(msize, fmem)) } } } contract Fog is usingOraclize { address public owner; address private playerAddress; uint private playerValue; event OwnershipTransferred( address indexed owner, address indexed newOwner ); event Winner(address indexed to, uint indexed value); event CupCake(address indexed to, uint indexed value); event Looser(address indexed from, uint indexed value); constructor() payable public { owner = msg.sender; oraclize_setProof(proofType_Ledger); // sets the Ledger authenticity proof in the constructor } function move() payable public { require(msg.value >= 10000000000000000); // min 0.01 Ether playerAddress = msg.sender; playerValue = msg.value; uint N = 1; // number of random bytes we want the datasource to return uint delay = 0; // number of seconds to wait before the execution takes place uint callbackGas = 200000; // amount of gas we want Oraclize to set for the callback function oraclize_newRandomDSQuery(delay, N, callbackGas); // this function internally generates the correct oraclize_query and returns its queryId } // the callback function is called by Oraclize when the result is ready // the oraclize_randomDS_proofVerify modifier prevents an invalid proof to execute this function code: // the proof validity is fully verified on-chain function __callback(bytes32 _queryId, string _result, bytes _proof) public { if (msg.sender != oraclize_cbAddress()) revert(); if (oraclize_randomDS_proofVerify__returnCode(_queryId, _result, _proof) != 0) { // the proof verification has failed } else { uint dice = uint(keccak256(abi.encodePacked(_result))) % 3; // Winner if (dice == 0) { uint doubleValue = mul(playerValue, 2); playerAddress.transfer(doubleValue); emit Winner(playerAddress, doubleValue); // Looser } else if (dice == 1) { emit Looser(playerAddress, playerValue); // Woa! Refund 80% } else if (dice == 2) { uint eightyPercent = div(mul(playerValue, 80), 100); playerAddress.transfer(eightyPercent); emit CupCake(playerAddress, eightyPercent); } } } function drain(uint value) public onlyOwner { require(value >= 0 && value < address(this).balance); owner.transfer(value); } function transferOwnership(address newOwner) public onlyOwner { require(newOwner != address(0)); emit OwnershipTransferred(owner, newOwner); owner = newOwner; } modifier onlyOwner() { require(msg.sender == owner); _; } function() public payable { } /** * @dev Multiplies two numbers, reverts on overflow. */ function mul(uint256 _a, uint256 _b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring &#39;a&#39; not being zero, but the // benefit is lost if &#39;b&#39; is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522 if (_a == 0) { return 0; } uint256 c = _a * _b; require(c / _a == _b); return c; } /** * @dev Integer division of two numbers truncating the quotient, reverts on division by zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { require(b > 0); // Solidity only automatically asserts when dividing by 0 uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn&#39;t hold return c; } }
True
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/** *Submitted for verification at Etherscan.io on 2022-03-25 */ /* At ElonGoat the goal to have the GOAT Elon Musk claim his statue that we will build with the famous designer Danny Wang. Main features are 1) Development is critical to our success and we plan to do alot so we have a 3% dev fee. 2) Our huge plans call for massive Marketing, so we have a 2% marketing fee. 3) We want everyone to benefit for HODLing so there is 2% reflection. 4) To keep the token value and liquidity strong we add 3% back to the liquidity pool. 5) Finally we have a 1% setaside for things like burns/exchanges/community votes. ________ __ ______ __ / |/ | / \ / | $$$$$$$$/ $$ | ______ _______ /$$$$$$ | ______ ______ _$$ |_ $$ |__ $$ | / \ / \ $$ | _$$/ / \ / \ / $$ | $$ | $$ |/$$$$$$ |$$$$$$$ |$$ |/ |/$$$$$$ | $$$$$$ |$$$$$$/ $$$$$/ $$ |$$ | $$ |$$ | $$ |$$ |$$$$ |$$ | $$ | / $$ | $$ | __ $$ |_____ $$ |$$ \__$$ |$$ | $$ |$$ \__$$ |$$ \__$$ |/$$$$$$$ | $$ |/ | $$ |$$ |$$ $$/ $$ | $$ |$$ $$/ $$ $$/ $$ $$ | $$ $$/ $$$$$$$$/ $$/ $$$$$$/ $$/ $$/ $$$$$$/ $$$$$$/ $$$$$$$/ $$$$/ */ // SPDX-License-Identifier: Unlicensed pragma solidity ^0.8.7; abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return payable(msg.sender); } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } interface IERC20 { function totalSupply() external view returns (uint256); function balanceOf(address account) external view returns (uint256); function transfer(address recipient, uint256 amount) external returns (bool); function allowance(address owner, address spender) external view returns (uint256); function approve(address spender, uint256 amount) external returns (bool); function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); event Approval(address indexed owner, address indexed spender, uint256 value); } library SafeMath { function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } library Address { function isContract(address account) internal view returns (bool) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { if (returndata.length > 0) { assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } contract Ownable is Context { address private _owner; address private _previousOwner; uint256 private _lockTime; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); constructor () { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } function owner() public view returns (address) { return _owner; } modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } function getUnlockTime() public view returns (uint256) { return _lockTime; } function getTime() public view returns (uint256) { return block.timestamp; } function lock(uint256 time) public virtual onlyOwner { _previousOwner = _owner; _owner = address(0); _lockTime = block.timestamp + time; emit OwnershipTransferred(_owner, address(0)); } function unlock() public virtual { require(_previousOwner == msg.sender, "You don't have permission to unlock"); require(block.timestamp > _lockTime , "Contract is locked until 7 days"); emit OwnershipTransferred(_owner, _previousOwner); _owner = _previousOwner; } } // pragma solidity >=0.5.0; interface IUniswapV2Factory { event PairCreated(address indexed token0, address indexed token1, address pair, uint); function feeTo() external view returns (address); function feeToSetter() external view returns (address); function getPair(address tokenA, address tokenB) external view returns (address pair); function allPairs(uint) external view returns (address pair); function allPairsLength() external view returns (uint); function createPair(address tokenA, address tokenB) external returns (address pair); function setFeeTo(address) external; function setFeeToSetter(address) external; } // pragma solidity >=0.5.0; interface IUniswapV2Pair { event Approval(address indexed owner, address indexed spender, uint value); event Transfer(address indexed from, address indexed to, uint value); function name() external pure returns (string memory); function symbol() external pure returns (string memory); function decimals() external pure returns (uint8); function totalSupply() external view returns (uint); function balanceOf(address owner) external view returns (uint); function allowance(address owner, address spender) external view returns (uint); function approve(address spender, uint value) external returns (bool); function transfer(address to, uint value) external returns (bool); function transferFrom(address from, address to, uint value) external returns (bool); function DOMAIN_SEPARATOR() external view returns (bytes32); function PERMIT_TYPEHASH() external pure returns (bytes32); function nonces(address owner) external view returns (uint); function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external; event Burn(address indexed sender, uint amount0, uint amount1, address indexed to); event Swap( address indexed sender, uint amount0In, uint amount1In, uint amount0Out, uint amount1Out, address indexed to ); event Sync(uint112 reserve0, uint112 reserve1); function MINIMUM_LIQUIDITY() external pure returns (uint); function factory() external view returns (address); function token0() external view returns (address); function token1() external view returns (address); function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast); function price0CumulativeLast() external view returns (uint); function price1CumulativeLast() external view returns (uint); function kLast() external view returns (uint); function burn(address to) external returns (uint amount0, uint amount1); function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external; function skim(address to) external; function sync() external; function initialize(address, address) external; } // pragma solidity >=0.6.2; interface IUniswapV2Router01 { function factory() external pure returns (address); function WETH() external pure returns (address); function addLiquidity( address tokenA, address tokenB, uint amountADesired, uint amountBDesired, uint amountAMin, uint amountBMin, address to, uint deadline ) external returns (uint amountA, uint amountB, uint liquidity); function addLiquidityETH( address token, uint amountTokenDesired, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external payable returns (uint amountToken, uint amountETH, uint liquidity); function removeLiquidity( address tokenA, address tokenB, uint liquidity, uint amountAMin, uint amountBMin, address to, uint deadline ) external returns (uint amountA, uint amountB); function removeLiquidityETH( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external returns (uint amountToken, uint amountETH); function removeLiquidityWithPermit( address tokenA, address tokenB, uint liquidity, uint amountAMin, uint amountBMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountA, uint amountB); function removeLiquidityETHWithPermit( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountToken, uint amountETH); function swapExactTokensForTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external returns (uint[] memory amounts); function swapTokensForExactTokens( uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline ) external returns (uint[] memory amounts); function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline) external payable returns (uint[] memory amounts); function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts); function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts); function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline) external payable returns (uint[] memory amounts); function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB); function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut); function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn); function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts); function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts); } // pragma solidity >=0.6.2; interface IUniswapV2Router02 is IUniswapV2Router01 { function removeLiquidityETHSupportingFeeOnTransferTokens( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external returns (uint amountETH); function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountETH); function swapExactTokensForTokensSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external; function swapExactETHForTokensSupportingFeeOnTransferTokens( uint amountOutMin, address[] calldata path, address to, uint deadline ) external payable; function swapExactTokensForETHSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external; } contract ElonGoat is Context, IERC20, Ownable { using SafeMath for uint256; using Address for address; address payable public marketingAddress = payable(0x910979430a4c74dEF9265037cB3b50e0F9c53381); // Marketing Address address payable public devAddress = payable(0xe52B6f3bBA6251B6aAdba84C62371024c81DbC76); // Dev Address address payable public buyBackAddress = payable(0x310E8A394dc33f736AeC21783454D34E08943dc9); // BuyBack Address mapping (address => uint256) private _rOwned; mapping (address => uint256) private _tOwned; mapping (address => mapping (address => uint256)) private _allowances; mapping (address => bool) private _isExcludedFromFee; mapping (address => bool) private _isExcluded; address[] private _excluded; mapping (address => bool) private _isLocked; uint256 private constant MAX = ~uint256(0); uint256 private _tTotal = 6000 * 10**6 * 10**9; uint256 private _rTotal = (MAX - (MAX % _tTotal)); uint256 private _tFeeTotal; string private _name = "ElonGoat"; string private _symbol = "EGT"; uint8 private _decimals = 9; uint256 public _taxFee = 20; // rfi tax uint256 private _previousTaxFee = _taxFee; uint256 public marketingDivisor = 20; uint256 public devDivisor = 10; uint256 public buyBackDivisor = 20; uint256 public autoLpDivisor = 30; uint256 public _totalFee = 80; // marketingDivisor + devDivisor + buyBackDivisor + autoLpDivisor uint256 private _previousTotalFee = _totalFee; uint256 public _maxTxAmount = 10000 * 10**6 * 10**9; uint256 private minimumTokensBeforeSwap = 2 * 10**6 * 10**9; IUniswapV2Router02 public immutable uniswapV2Router; address public immutable uniswapV2Pair; bool inSwapAndLiquify; bool public swapAndLiquifyEnabled = false; bool public contractLockEnabled = true; event ContractLockEnabledUpdated(bool enabled); event FeesUpdated(uint256 autoLpDivisor, uint256 devDivisor, uint256 marketingDivisor, uint256 buyBackDivisor); event TaxUpdated(uint256 taxFee); event SwapAndLiquifyEnabledUpdated(bool enabled); event SwapAndLiquify( uint256 tokensSwapped, uint256 ethReceived, uint256 tokensIntoLiqudity ); event SwapTokensForETH( uint256 amountIn, address[] path ); modifier lockTheSwap { inSwapAndLiquify = true; _; inSwapAndLiquify = false; } constructor (address _bridge) { _rOwned[_bridge] = _rTotal; IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()) .createPair(address(this), _uniswapV2Router.WETH()); uniswapV2Router = _uniswapV2Router; _isExcludedFromFee[owner()] = true; _isExcludedFromFee[address(this)] = true; _isExcludedFromFee[_bridge] = true; emit Transfer(address(0), _bridge, _tTotal); } function name() public view returns (string memory) { return _name; } function symbol() public view returns (string memory) { return _symbol; } function decimals() public view returns (uint8) { return _decimals; } function totalSupply() public view override returns (uint256) { return _tTotal; } function balanceOf(address account) public view override returns (uint256) { if (_isExcluded[account]) return _tOwned[account]; return tokenFromReflection(_rOwned[account]); } function transfer(address recipient, uint256 amount) public override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } function allowance(address owner, address spender) public view override returns (uint256) { return _allowances[owner][spender]; } function approve(address spender, uint256 amount) public override returns (bool) { _approve(_msgSender(), spender, amount); return true; } function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } function isExcludedFromReward(address account) public view returns (bool) { return _isExcluded[account]; } function totalFees() public view returns (uint256) { return _tFeeTotal; } function minimumTokensBeforeSwapAmount() public view returns (uint256) { return minimumTokensBeforeSwap; } function deliver(uint256 tAmount) public { address sender = _msgSender(); require(!_isExcluded[sender], "Excluded addresses cannot call this function"); (uint256 rAmount,,,,,) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rTotal = _rTotal.sub(rAmount); _tFeeTotal = _tFeeTotal.add(tAmount); } function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) { require(tAmount <= _tTotal, "Amount must be less than supply"); if (!deductTransferFee) { (uint256 rAmount,,,,,) = _getValues(tAmount); return rAmount; } else { (,uint256 rTransferAmount,,,,) = _getValues(tAmount); return rTransferAmount; } } function tokenFromReflection(uint256 rAmount) public view returns(uint256) { require(rAmount <= _rTotal, "Amount must be less than total reflections"); uint256 currentRate = _getRate(); return rAmount.div(currentRate); } function excludeFromReward(address account) public onlyOwner() { require(!_isExcluded[account], "Account is already excluded"); if(_rOwned[account] > 0) { _tOwned[account] = tokenFromReflection(_rOwned[account]); } _isExcluded[account] = true; _excluded.push(account); } function includeInReward(address account) external onlyOwner() { require(_isExcluded[account], "Account is already excluded"); for (uint256 i = 0; i < _excluded.length; i++) { if (_excluded[i] == account) { _excluded[i] = _excluded[_excluded.length - 1]; _rOwned[account] = _tOwned[account].mul(_getRate()); _tOwned[account] = 0; _isExcluded[account] = false; _excluded.pop(); break; } } } function _approve(address owner, address spender, uint256 amount) private { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } function _transfer( address from, address to, uint256 amount ) private { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); require(amount > 0, "Transfer amount must be greater than zero"); require(!_isLocked[to], "This address is currently locked from transacting."); require(!_isLocked[from], "This address is currently locked from transacting."); if(from != owner() && to != owner()) { require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount."); } if(contractLockEnabled) { require(from == owner() || to == owner(), 'Contract is locked, must be owner.'); } uint256 contractTokenBalance = balanceOf(address(this)); bool overMinimumTokenBalance = contractTokenBalance >= minimumTokensBeforeSwap; if (!inSwapAndLiquify && swapAndLiquifyEnabled && to == uniswapV2Pair) { if (overMinimumTokenBalance) { contractTokenBalance = minimumTokensBeforeSwap; swapTokens(contractTokenBalance); } } bool takeFee = true; //if any account belongs to _isExcludedFromFee account then remove the fee if(_isExcludedFromFee[from] || _isExcludedFromFee[to]){ takeFee = false; } _tokenTransfer(from,to,amount,takeFee); } function swapTokens(uint256 contractTokenBalance) private lockTheSwap { uint256 amountToLiquify = contractTokenBalance.mul(autoLpDivisor).div(_totalFee).div(2); uint256 amountToSwap = contractTokenBalance.sub(amountToLiquify); uint256 initialBalance = address(this).balance; swapTokensForEth(amountToSwap); uint256 transferredBalance = address(this).balance.sub(initialBalance); uint256 totalBNBFee = _totalFee.sub(autoLpDivisor.div(2)); // adding liquidity if(amountToLiquify > 0) // enabling to set autoLP tax to zero addLiquidity(amountToLiquify, transferredBalance.mul(autoLpDivisor).div(totalBNBFee).div(2)); //Send to Marketing address transferToAddressETH(marketingAddress, transferredBalance.mul(marketingDivisor).div(totalBNBFee)); transferToAddressETH(devAddress, transferredBalance.mul(devDivisor).div(totalBNBFee)); transferToAddressETH(buyBackAddress, transferredBalance.mul(buyBackDivisor).div(totalBNBFee)); } function swapTokensForEth(uint256 tokenAmount) private { // generate the uniswap pair path of token -> weth address[] memory path = new address[](2); path[0] = address(this); path[1] = uniswapV2Router.WETH(); _approve(address(this), address(uniswapV2Router), tokenAmount); // make the swap uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens( tokenAmount, 0, // accept any amount of ETH path, address(this), // The contract block.timestamp ); emit SwapTokensForETH(tokenAmount, path); } function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private { // approve token transfer to cover all possible scenarios _approve(address(this), address(uniswapV2Router), tokenAmount); // add the liquidity uniswapV2Router.addLiquidityETH{value: ethAmount}( address(this), tokenAmount, 0, // slippage is unavoidable 0, // slippage is unavoidable owner(), block.timestamp ); } function _tokenTransfer(address sender, address recipient, uint256 amount,bool takeFee) private { if(!takeFee) removeAllFee(); if (_isExcluded[sender] && !_isExcluded[recipient]) { _transferFromExcluded(sender, recipient, amount); } else if (!_isExcluded[sender] && _isExcluded[recipient]) { _transferToExcluded(sender, recipient, amount); } else if (_isExcluded[sender] && _isExcluded[recipient]) { _transferBothExcluded(sender, recipient, amount); } else { _transferStandard(sender, recipient, amount); } if(!takeFee) restoreAllFee(); } function _transferStandard(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rTax, uint256 tTransferAmount, uint256 tTax, uint256 tFee) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _takeTeam(tFee); _reflectFee(rTax, tTax); emit Transfer(sender, recipient, tTransferAmount); } function _transferToExcluded(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rTax, uint256 tTransferAmount, uint256 tTax, uint256 tFee) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _takeTeam(tFee); _reflectFee(rTax, tTax); emit Transfer(sender, recipient, tTransferAmount); } function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rTax, uint256 tTransferAmount, uint256 tTax, uint256 tFee) = _getValues(tAmount); _tOwned[sender] = _tOwned[sender].sub(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _takeTeam(tFee); _reflectFee(rTax, tTax); emit Transfer(sender, recipient, tTransferAmount); } function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rTax, uint256 tTransferAmount, uint256 tTax, uint256 tFee) = _getValues(tAmount); _tOwned[sender] = _tOwned[sender].sub(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _takeTeam(tFee); _reflectFee(rTax, tTax); emit Transfer(sender, recipient, tTransferAmount); } function _reflectFee(uint256 rTax, uint256 tTax) private { _rTotal = _rTotal.sub(rTax); _tFeeTotal = _tFeeTotal.add(tTax); } function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) { (uint256 tTransferAmount, uint256 tTax, uint256 tFee) = _getTValues(tAmount); (uint256 rAmount, uint256 rTransferAmount, uint256 rTax) = _getRValues(tAmount, tTax, tFee, _getRate()); return (rAmount, rTransferAmount, rTax, tTransferAmount, tTax, tFee); } function _getTValues(uint256 tAmount) private view returns (uint256, uint256, uint256) { uint256 tTax = calculateTaxFee(tAmount); uint256 tFee = calculateTotalFee(tAmount); uint256 tTransferAmount = tAmount.sub(tTax).sub(tFee); return (tTransferAmount, tTax, tFee); } function _getRValues(uint256 tAmount, uint256 tTax, uint256 tFee, uint256 currentRate) private pure returns (uint256, uint256, uint256) { uint256 rAmount = tAmount.mul(currentRate); uint256 rTax = tTax.mul(currentRate); uint256 rFee = tFee.mul(currentRate); uint256 rTransferAmount = rAmount.sub(rTax).sub(rFee); return (rAmount, rTransferAmount, rTax); } function _getRate() private view returns(uint256) { (uint256 rSupply, uint256 tSupply) = _getCurrentSupply(); return rSupply.div(tSupply); } function _getCurrentSupply() private view returns(uint256, uint256) { uint256 rSupply = _rTotal; uint256 tSupply = _tTotal; for (uint256 i = 0; i < _excluded.length; i++) { if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal); rSupply = rSupply.sub(_rOwned[_excluded[i]]); tSupply = tSupply.sub(_tOwned[_excluded[i]]); } if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal); return (rSupply, tSupply); } function _takeTeam(uint256 tFee) private { uint256 currentRate = _getRate(); uint256 rFee = tFee.mul(currentRate); _rOwned[address(this)] = _rOwned[address(this)].add(rFee); if(_isExcluded[address(this)]) _tOwned[address(this)] = _tOwned[address(this)].add(tFee); } function calculateTaxFee(uint256 _amount) private view returns (uint256) { return _amount.mul(_taxFee).div( 10**3 ); } function calculateTotalFee(uint256 _amount) private view returns (uint256) { return _amount.mul(_totalFee).div( 10**3 ); } function removeAllFee() private { if(_taxFee == 0 && _totalFee == 0) return; _previousTaxFee = _taxFee; _previousTotalFee = _totalFee; _taxFee = 0; _totalFee = 0; } function restoreAllFee() private { _taxFee = _previousTaxFee; _totalFee = _previousTotalFee; } function isExcludedFromFee(address account) public view returns(bool) { return _isExcludedFromFee[account]; } function excludeFromFee(address account) public onlyOwner { _isExcludedFromFee[account] = true; } function includeInFee(address account) public onlyOwner { _isExcludedFromFee[account] = false; } function isLocked(address account) public view returns(bool) { return _isLocked[account]; } function lockAccount(address account) public onlyOwner { _isLocked[account] = true; } function unlockAccount(address account) public onlyOwner { _isLocked[account] = false; } function setTaxFeePercent(uint256 taxFee) external onlyOwner() { _taxFee = taxFee; emit TaxUpdated(taxFee); } function updateFeeDivisor(uint256 newAutoLpDivisor, uint256 newDevDivisor, uint256 newMarketingDivisor, uint256 newBuyBackDivisor) external onlyOwner { uint256 newTotalFee = newAutoLpDivisor.add(newDevDivisor).add(newMarketingDivisor).add(newBuyBackDivisor); require( newTotalFee <= 200, "cant set fees to more than 20%"); autoLpDivisor = newAutoLpDivisor; devDivisor = newDevDivisor; marketingDivisor = newMarketingDivisor; buyBackDivisor = newBuyBackDivisor; _previousTotalFee = _totalFee; _totalFee = newTotalFee; emit FeesUpdated(newAutoLpDivisor, newDevDivisor, newMarketingDivisor, newBuyBackDivisor); } function setMaxTxAmount(uint256 maxTxAmount) external onlyOwner() { _maxTxAmount = maxTxAmount; } function setNumTokensSellToAddToLiquidity(uint256 _minimumTokensBeforeSwap) external onlyOwner() { minimumTokensBeforeSwap = _minimumTokensBeforeSwap; } function setMarketingAddress(address _marketingAddress) external onlyOwner() { marketingAddress = payable(_marketingAddress); } function setDevAddress(address _devAddress) external onlyOwner() { devAddress = payable(_devAddress); } function setBuyBackAddress(address _buyBackAddress) external onlyOwner() { buyBackAddress = payable(_buyBackAddress); } function setSwapAndLiquifyEnabled(bool _enabled) public onlyOwner { swapAndLiquifyEnabled = _enabled; emit SwapAndLiquifyEnabledUpdated(_enabled); } function setContractLockEnabled(bool _enabled) public onlyOwner { contractLockEnabled = _enabled; emit ContractLockEnabledUpdated(_enabled); } function transferToAddressETH(address payable recipient, uint256 amount) private { recipient.transfer(amount); } //to recieve ETH from uniswapV2Router when swaping receive() external payable {} }
True
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/** *Submitted for verification at Etherscan.io on 2021-02-10 */ /** *Submitted for verification at Etherscan.io on 2021-02-09 */ //SPDX-License-Identifier: MIT pragma solidity ^0.7.6; interface IERC20 { function totalSupply() external view returns (uint); function balanceOf(address account) external view returns (uint); function transfer(address recipient, uint amount) external returns (bool); function allowance(address owner, address spender) external view returns (uint); function approve(address spender, uint amount) external returns (bool); function transferFrom(address sender, address recipient, uint amount) external returns (bool); event Transfer(address indexed from, address indexed to, uint value); event Approval(address indexed owner, address indexed spender, uint value); } library SafeMath { function add(uint a, uint b) internal pure returns (uint) { uint c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } function sub(uint a, uint b) internal pure returns (uint) { return sub(a, b, "SafeMath: subtraction overflow"); } function sub(uint a, uint b, string memory errorMessage) internal pure returns (uint) { require(b <= a, errorMessage); uint c = a - b; return c; } function mul(uint a, uint b) internal pure returns (uint) { if (a == 0) { return 0; } uint c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } function div(uint a, uint b) internal pure returns (uint) { return div(a, b, "SafeMath: division by zero"); } function div(uint a, uint b, string memory errorMessage) internal pure returns (uint) { // Solidity only automatically asserts when dividing by 0 require(b > 0, errorMessage); uint c = a / b; return c; } } contract Context { constructor () public { } // solhint-disable-previous-line no-empty-blocks function _msgSender() internal view returns (address payable) { return msg.sender; } } contract ERC20 is Context, IERC20 { using SafeMath for uint; mapping (address => uint) internal _balances; mapping (address => mapping (address => uint)) internal _allowances; uint internal _totalSupply; function totalSupply() public view override returns (uint) { return _totalSupply; } function balanceOf(address account) public view override returns (uint) { return _balances[account]; } function transfer(address recipient, uint amount) public override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } function allowance(address owner, address spender) public view override returns (uint) { return _allowances[owner][spender]; } function approve(address spender, uint amount) public override returns (bool) { _approve(_msgSender(), spender, amount); return true; } function transferFrom(address sender, address recipient, uint amount) public override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } function increaseAllowance(address spender, uint addedValue) public returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } function decreaseAllowance(address spender, uint subtractedValue) public returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } function _transfer(address sender, address recipient, uint amount) internal { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } function _approve(address owner, address spender, uint amount) internal { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } function _burn(address account, uint amount) public { require(account != address(0), "ERC20: burn from the zero address"); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } } contract ERC20Detailed is ERC20 { string private _name; string private _symbol; uint8 private _decimals; constructor (string memory name, string memory symbol, uint8 decimals) public { _name = name; _symbol = symbol; _decimals = decimals; } function name() public view returns (string memory) { return _name; } function symbol() public view returns (string memory) { return _symbol; } function decimals() public view returns (uint8) { return _decimals; } } library Address { function isContract(address account) internal view returns (bool) { bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != 0x0 && codehash != accountHash); } } library SafeERC20 { using SafeMath for uint; using Address for address; function safeTransfer(IERC20 token, address to, uint value) internal { callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(IERC20 token, address from, address to, uint value) internal { callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } function safeApprove(IERC20 token, address spender, uint value) internal { require((value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function callOptionalReturn(IERC20 token, bytes memory data) private { require(address(token).isContract(), "SafeERC20: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = address(token).call(data); require(success, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } } contract BMW is ERC20, ERC20Detailed { using SafeERC20 for IERC20; using Address for address; using SafeMath for uint256; address public admin; constructor () public ERC20Detailed("TerangaBMW", "BMW", 18) { admin = msg.sender; _totalSupply = 1000000 *(10**uint256(18)); _balances[admin] = _totalSupply; } }
True
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/** *Submitted for verification at Etherscan.io on 2021-06-01 */ /** *Submitted for verification at Etherscan.io on 2021-05-31 */ // SPDX-License-Identifier: Unlicensed pragma solidity >=0.6.2; abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when an * operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also ested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } contract Ownable is Context { address private _owner; address private _previousOwner; uint256 private _lockTime; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor () internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } function geUnlockTime() public view returns (uint256) { return _lockTime; } //Locks the contract for owner for the amount of time provided function lock(uint256 time) public virtual onlyOwner { _previousOwner = _owner; _owner = address(0); _lockTime = now + time; emit OwnershipTransferred(_owner, address(0)); } //Unlocks the contract for owner when _lockTime is exceeds function unlock() public virtual { require(_previousOwner == msg.sender, "You don't have permission to unlock"); require(now > _lockTime , "Contract is locked until 7 days"); emit OwnershipTransferred(_owner, _previousOwner); _owner = _previousOwner; } } contract Dmax is Context, IERC20, Ownable { using SafeMath for uint256; using Address for address; mapping (address => uint256) private _rOwned; mapping (address => uint256) private _tOwned; mapping (address => mapping (address => uint256)) private _allowances; mapping (address => bool) private _isExcluded; address[] private _excluded; mapping (address => bool) private _isBlackListedBot; address[] private _blackListedBots; uint256 private constant MAX = ~uint256(0); uint256 private _tTotal = 100000000000 * 10**9; uint256 private _rTotal = (MAX - (MAX % _tTotal)); uint256 private _tFeeTotal; uint256 private _tBurnTotal; string private _name = 'Dogecoin Max'; string private _symbol = 'Dmax'; uint8 private _decimals = 9; uint256 private _taxFee = 0; uint256 private _burnFee = 5; uint256 private _maxTxAmount = 100000000000e9; constructor () public { _rOwned[_msgSender()] = _rTotal; emit Transfer(address(0), _msgSender(), _tTotal); } function name() public view returns (string memory) { return _name; } function symbol() public view returns (string memory) { return _symbol; } function decimals() public view returns (uint8) { return _decimals; } function totalSupply() public view override returns (uint256) { return _tTotal; } function balanceOf(address account) public view override returns (uint256) { if (_isExcluded[account]) return _tOwned[account]; return tokenFromReflection(_rOwned[account]); } function transfer(address recipient, uint256 amount) public override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } function allowance(address owner, address spender) public view override returns (uint256) { return _allowances[owner][spender]; } function approve(address spender, uint256 amount) public override returns (bool) { _approve(_msgSender(), spender, amount); return true; } function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } function isExcluded(address account) public view returns (bool) { return _isExcluded[account]; } function totalFees() public view returns (uint256) { return _tFeeTotal; } function totalBurn() public view returns (uint256) { return _tBurnTotal; } function deliver(uint256 tAmount) public { address sender = _msgSender(); require(!_isExcluded[sender], "Excluded addresses cannot call this function"); (uint256 rAmount,,,,,) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rTotal = _rTotal.sub(rAmount); _tFeeTotal = _tFeeTotal.add(tAmount); } function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) { require(tAmount <= _tTotal, "Amount must be less than supply"); if (!deductTransferFee) { (uint256 rAmount,,,,,) = _getValues(tAmount); return rAmount; } else { (,uint256 rTransferAmount,,,,) = _getValues(tAmount); return rTransferAmount; } } function tokenFromReflection(uint256 rAmount) public view returns(uint256) { require(rAmount <= _rTotal, "Amount must be less than total reflections"); uint256 currentRate = _getRate(); return rAmount.div(currentRate); } function excludeAccount(address account) external onlyOwner() { require(account != 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D, 'We can not exclude Uniswap router.'); require(!_isExcluded[account], "Account is already excluded"); if(_rOwned[account] > 0) { _tOwned[account] = tokenFromReflection(_rOwned[account]); } _isExcluded[account] = true; _excluded.push(account); } function includeAccount(address account) external onlyOwner() { require(_isExcluded[account], "Account is already excluded"); for (uint256 i = 0; i < _excluded.length; i++) { if (_excluded[i] == account) { _excluded[i] = _excluded[_excluded.length - 1]; _tOwned[account] = 0; _isExcluded[account] = false; _excluded.pop(); break; } } } function addBotToBlackList(address account) external onlyOwner() { require(account != 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D, 'We can not blacklist Uniswap router.'); require(!_isBlackListedBot[account], "Account is already blacklisted"); _isBlackListedBot[account] = true; _blackListedBots.push(account); } function removeBotFromBlackList(address account) external onlyOwner() { require(_isBlackListedBot[account], "Account is not blacklisted"); for (uint256 i = 0; i < _blackListedBots.length; i++) { if (_blackListedBots[i] == account) { _blackListedBots[i] = _blackListedBots[_blackListedBots.length - 1]; _isBlackListedBot[account] = false; _blackListedBots.pop(); break; } } } function _approve(address owner, address spender, uint256 amount) private { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } function _transfer(address sender, address recipient, uint256 amount) private { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); require(amount > 0, "Transfer amount must be greater than zero"); require(!_isBlackListedBot[recipient], "You have no power here!"); require(!_isBlackListedBot[msg.sender], "You have no power here!"); require(!_isBlackListedBot[sender], "You have no power here!"); if(sender != owner() && recipient != owner()) require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount."); if (_isExcluded[sender] && !_isExcluded[recipient]) { _transferFromExcluded(sender, recipient, amount); } else if (!_isExcluded[sender] && _isExcluded[recipient]) { _transferToExcluded(sender, recipient, amount); } else if (!_isExcluded[sender] && !_isExcluded[recipient]) { _transferStandard(sender, recipient, amount); } else if (_isExcluded[sender] && _isExcluded[recipient]) { _transferBothExcluded(sender, recipient, amount); } else { _transferStandard(sender, recipient, amount); } } function _transferStandard(address sender, address recipient, uint256 tAmount) private { uint256 currentRate = _getRate(); (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tBurn) = _getValues(tAmount); uint256 rBurn = tBurn.mul(currentRate); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _reflectFee(rFee, rBurn, tFee, tBurn); emit Transfer(sender, recipient, tTransferAmount); } function _transferToExcluded(address sender, address recipient, uint256 tAmount) private { uint256 currentRate = _getRate(); (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tBurn) = _getValues(tAmount); uint256 rBurn = tBurn.mul(currentRate); _rOwned[sender] = _rOwned[sender].sub(rAmount); _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _reflectFee(rFee, rBurn, tFee, tBurn); emit Transfer(sender, recipient, tTransferAmount); } function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private { uint256 currentRate = _getRate(); (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tBurn) = _getValues(tAmount); uint256 rBurn = tBurn.mul(currentRate); _tOwned[sender] = _tOwned[sender].sub(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _reflectFee(rFee, rBurn, tFee, tBurn); emit Transfer(sender, recipient, tTransferAmount); } function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private { uint256 currentRate = _getRate(); (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tBurn) = _getValues(tAmount); uint256 rBurn = tBurn.mul(currentRate); _tOwned[sender] = _tOwned[sender].sub(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _reflectFee(rFee, rBurn, tFee, tBurn); emit Transfer(sender, recipient, tTransferAmount); } function _reflectFee(uint256 rFee, uint256 rBurn, uint256 tFee, uint256 tBurn) private { _rTotal = _rTotal.sub(rFee).sub(rBurn); _tFeeTotal = _tFeeTotal.add(tFee); _tBurnTotal = _tBurnTotal.add(tBurn); _tTotal = _tTotal.sub(tBurn); } function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) { (uint256 tTransferAmount, uint256 tFee, uint256 tBurn) = _getTValues(tAmount, _taxFee, _burnFee); uint256 currentRate = _getRate(); (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tBurn, currentRate); return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tBurn); } function _getTValues(uint256 tAmount, uint256 taxFee, uint256 burnFee) private pure returns (uint256, uint256, uint256) { uint256 tFee = tAmount.mul(taxFee).div(100); uint256 tBurn = tAmount.mul(burnFee).div(100); uint256 tTransferAmount = tAmount.sub(tFee).sub(tBurn); return (tTransferAmount, tFee, tBurn); } function _getRValues(uint256 tAmount, uint256 tFee, uint256 tBurn, uint256 currentRate) private pure returns (uint256, uint256, uint256) { uint256 rAmount = tAmount.mul(currentRate); uint256 rFee = tFee.mul(currentRate); uint256 rBurn = tBurn.mul(currentRate); uint256 rTransferAmount = rAmount.sub(rFee).sub(rBurn); return (rAmount, rTransferAmount, rFee); } function _getRate() private view returns(uint256) { (uint256 rSupply, uint256 tSupply) = _getCurrentSupply(); return rSupply.div(tSupply); } function _getCurrentSupply() private view returns(uint256, uint256) { uint256 rSupply = _rTotal; uint256 tSupply = _tTotal; for (uint256 i = 0; i < _excluded.length; i++) { if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal); rSupply = rSupply.sub(_rOwned[_excluded[i]]); tSupply = tSupply.sub(_tOwned[_excluded[i]]); } if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal); return (rSupply, tSupply); } function _getTaxFee() private view returns(uint256) { return _taxFee; } function _getMaxTxAmount() private view returns(uint256) { return _maxTxAmount; } function _setTaxFee(uint256 taxFee) external onlyOwner() { require(taxFee >= _taxFee && taxFee <= 10, 'taxFee can only be increased and max is 10'); _taxFee = taxFee; } function _setBurnFee(uint256 burnFee) external onlyOwner() { require(burnFee >= _burnFee && burnFee <= 10, 'burnFee can only be increased and max is 10'); _burnFee = burnFee; } function _setMaxTxAmount(uint256 maxTxAmount) external onlyOwner() { require(maxTxAmount >= 100000000000e9 , 'maxTxAmount should be greater than 100000000000e9'); _maxTxAmount = maxTxAmount; } }
True
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/** *Submitted for verification at Etherscan.io on 2021-06-07 */ /** *Submitted for verification at Etherscan.io on 2020-08-14 */ pragma solidity ^0.5.0; // ---------------------------------------------------------------------------- // ERC Token Standard #20 Interface // // ---------------------------------------------------------------------------- contract ERC20Interface { function totalSupply() public view returns (uint); function balanceOf(address tokenOwner) public view returns (uint balance); function allowance(address tokenOwner, address spender) public view returns (uint remaining); function transfer(address to, uint tokens) public returns (bool success); function approve(address spender, uint tokens) public returns (bool success); function transferFrom(address from, address to, uint tokens) public returns (bool success); event Transfer(address indexed from, address indexed to, uint tokens); event Approval(address indexed tokenOwner, address indexed spender, uint tokens); } // ---------------------------------------------------------------------------- // Safe Math Library // ---------------------------------------------------------------------------- contract SafeMath { function safeAdd(uint a, uint b) public pure returns (uint c) { c = a + b; require(c >= a); } function safeSub(uint a, uint b) public pure returns (uint c) { require(b <= a); c = a - b; } function safeMul(uint a, uint b) public pure returns (uint c) { c = a * b; require(a == 0 || c / a == b); } function safeDiv(uint a, uint b) public pure returns (uint c) { require(b > 0); c = a / b; } } contract EWEAT is ERC20Interface, SafeMath { string public name; string public symbol; uint8 public decimals; // 18 decimals is the strongly suggested default, avoid changing it uint256 public _totalSupply; mapping(address => uint) balances; mapping(address => mapping(address => uint)) allowed; /** * Constrctor function * * Initializes contract with initial supply tokens to the creator of the contract */ constructor() public { name = "EWTFS"; symbol = "EWSFI"; decimals = 18; _totalSupply = 1000000000000000000000000000000; balances[msg.sender] = _totalSupply; emit Transfer(address(0), msg.sender, _totalSupply); } function totalSupply() public view returns (uint) { return _totalSupply - balances[address(0)]; } function balanceOf(address tokenOwner) public view returns (uint balance) { return balances[tokenOwner]; } function allowance(address tokenOwner, address spender) public view returns (uint remaining) { return allowed[tokenOwner][spender]; } function approve(address spender, uint tokens) public returns (bool success) { allowed[msg.sender][spender] = tokens; emit Approval(msg.sender, spender, tokens); return true; } function transfer(address to, uint tokens) public returns (bool success) { balances[msg.sender] = safeSub(balances[msg.sender], tokens); balances[to] = safeAdd(balances[to], tokens); emit Transfer(msg.sender, to, tokens); return true; } function transferFrom(address from, address to, uint tokens) public returns (bool success) { balances[from] = safeSub(balances[from], tokens); allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens); balances[to] = safeAdd(balances[to], tokens); emit Transfer(from, to, tokens); return true; } }
True
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pragma solidity ^0.4.23; contract SafeMath { function safeAdd(uint a, uint b) public pure returns (uint c) { c = a + b; require(c >= a); } function safeSub(uint a, uint b) public pure returns (uint c) { require(b <= a); c = a - b; } function safeMul(uint a, uint b) public pure returns (uint c) { c = a * b; require(a == 0 || c / a == b); } function safeDiv(uint a, uint b) public pure returns (uint c) { require(b > 0); c = a / b; } } contract ERC20Interface { function totalSupply() public constant returns (uint); function balanceOf(address tokenOwner) public constant returns (uint balance); function allowance(address tokenOwner, address spender) public constant returns (uint remaining); function transfer(address to, uint tokens) public returns (bool success); function approve(address spender, uint tokens) public returns (bool success); function transferFrom(address from, address to, uint tokens) public returns (bool success); event Transfer(address indexed from, address indexed to, uint tokens); event Approval(address indexed tokenOwner, address indexed spender, uint tokens); } // ---------------------------------------------------------------------------- // Owned contract // ---------------------------------------------------------------------------- contract Owned { address public owner; address public newOwner; event OwnershipTransferred(address indexed _from, address indexed _to); constructor() public { owner = msg.sender; } modifier onlyOwner { require(msg.sender == owner); _; } function transferOwnership(address _newOwner) public onlyOwner { newOwner = _newOwner; } function acceptOwnership() public { require(msg.sender == newOwner); emit OwnershipTransferred(owner, newOwner); owner = newOwner; newOwner = address(0); } } contract MamaToken is ERC20Interface, Owned, SafeMath { string public constant name = "MamaMutua"; string public constant symbol = "M2M"; uint32 public constant decimals = 18; uint public _rate = 600; uint256 public _totalSupply = 60000000 * (10 ** 18); address owner; // amount of raised money in Wei uint256 public weiRaised; mapping(address => uint) balances; mapping(address => mapping(address => uint)) allowed; uint public openingTime = 1527638401; // 30 May 2018 00:01 uint public closingTime = 1546214399; // 30 Dec 2018 23:59 constructor() public { balances[msg.sender] = _totalSupply; owner = msg.sender; emit Transfer(address(0), msg.sender, _totalSupply); } function burn(uint256 _amount) public onlyOwner returns (bool) { require(_amount <= balances[msg.sender]); balances[msg.sender] = safeSub(balances[msg.sender], _amount); _totalSupply = safeSub(_totalSupply, _amount); emit Transfer(msg.sender, address(0), _amount); return true; } function mint(address _to, uint256 _amount) public onlyOwner returns (bool) { require(_totalSupply + _amount >= _totalSupply); // Overflow check _totalSupply = safeAdd(_totalSupply, _amount); balances[_to] = safeAdd(balances[_to], _amount); emit Transfer(address(0), _to, _amount); return true; } function totalSupply() public constant returns (uint) { return _totalSupply - balances[address(0)]; } function balanceOf(address tokenOwner) public constant returns (uint balance) { return balances[tokenOwner]; } function transfer(address to, uint256 tokens) public returns (bool success) { /* Check if sender has balance and for overflows */ require(balances[msg.sender] >= tokens && balances[to] + tokens >= balances[to]); // mitigates the ERC20 short address attack if(msg.data.length < (2 * 32) + 4) { revert(); } balances[msg.sender] = safeSub(balances[msg.sender], tokens); balances[to] = safeAdd(balances[to], tokens); emit Transfer(msg.sender, to, tokens); return true; } function approve(address spender, uint tokens) public returns (bool success) { // mitigates the ERC20 spend/approval race condition if (tokens != 0 && allowed[msg.sender][spender] != 0) { return false; } allowed[msg.sender][spender] = tokens; emit Approval(msg.sender, spender, tokens); return true; } function transferFrom(address from, address to, uint tokens) public returns (bool success) { // mitigates the ERC20 short address attack if(msg.data.length < (3 * 32) + 4) { revert(); } balances[from] = safeSub(balances[from], tokens); allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens); balances[to] = safeAdd(balances[to], tokens); emit Transfer(from, to, tokens); return true; } function allowance(address tokenOwner, address spender) public constant returns (uint remaining) { return allowed[tokenOwner][spender]; } function () external payable { // Check ICO period require(block.timestamp >= openingTime && block.timestamp <= closingTime); buyTokens(msg.sender); } // low level token purchase function function buyTokens(address beneficiary) public payable { require(beneficiary != address(0)); require(beneficiary != 0x0); require(msg.value > 1 finney); uint256 weiAmount = msg.value; // update state weiRaised = safeAdd(weiRaised, weiAmount); // calculate token amount to be created uint256 tokensIssued = safeMul(_rate, weiAmount); // transfer tokens balances[owner] = safeSub(balances[owner], tokensIssued); balances[beneficiary] = safeAdd(balances[beneficiary], tokensIssued); emit Transfer(owner, beneficiary, tokensIssued); forwardFunds(weiAmount); } function forwardFunds(uint256 _weiAmount) internal { owner.transfer(_weiAmount); } function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) { return ERC20Interface(tokenAddress).transfer(owner, tokens); } }
True
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/** *Submitted for verification at Etherscan.io on 2022-01-01 */ // File: contracts/doodlecats.sol // File: @openzeppelin/contracts/utils/introspection/IERC165.sol pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); } // File: @openzeppelin/contracts/token/ERC721/IERC721.sol pragma solidity ^0.8.0; /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes calldata data ) external; } // File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol pragma solidity ^0.8.0; /** * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Enumerable is IERC721 { /** * @dev Returns the total amount of tokens stored by the contract. */ function totalSupply() external view returns (uint256); /** * @dev Returns a token ID owned by `owner` at a given `index` of its token list. * Use along with {balanceOf} to enumerate all of ``owner``'s tokens. */ function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId); /** * @dev Returns a token ID at a given `index` of all the tokens stored by the contract. * Use along with {totalSupply} to enumerate all tokens. */ function tokenByIndex(uint256 index) external view returns (uint256); } // File: @openzeppelin/contracts/utils/introspection/ERC165.sol pragma solidity ^0.8.0; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } } // File: @openzeppelin/contracts/utils/Strings.sol pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); while (value != 0) { digits -= 1; buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); value /= 10; } return string(buffer); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0x00"; } uint256 temp = value; uint256 length = 0; while (temp != 0) { length++; temp >>= 8; } return toHexString(value, length); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _HEX_SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } } // File: @openzeppelin/contracts/utils/Address.sol pragma solidity ^0.8.0; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } // File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol pragma solidity ^0.8.0; /** * @title ERC-721 Non-Fungible Token Standard, optional metadata extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Metadata is IERC721 { /** * @dev Returns the token collection name. */ function name() external view returns (string memory); /** * @dev Returns the token collection symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token. */ function tokenURI(uint256 tokenId) external view returns (string memory); } // File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol pragma solidity ^0.8.0; /** * @title ERC721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC721 asset contracts. */ interface IERC721Receiver { /** * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} * by `operator` from `from`, this function is called. * * It must return its Solidity selector to confirm the token transfer. * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted. * * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`. */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); } // File: @openzeppelin/contracts/utils/Context.sol pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } } // File: @openzeppelin/contracts/token/ERC721/ERC721.sol pragma solidity ^0.8.0; /** * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including * the Metadata extension, but not including the Enumerable extension, which is available separately as * {ERC721Enumerable}. */ contract ERC721 is Context, ERC165, IERC721, IERC721Metadata { using Address for address; using Strings for uint256; // Token name string private _name; // Token symbol string private _symbol; // Mapping from token ID to owner address mapping(uint256 => address) private _owners; // Mapping owner address to token count mapping(address => uint256) private _balances; // Mapping from token ID to approved address mapping(uint256 => address) private _tokenApprovals; // Mapping from owner to operator approvals mapping(address => mapping(address => bool)) private _operatorApprovals; /** * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) { return interfaceId == type(IERC721).interfaceId || interfaceId == type(IERC721Metadata).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC721-balanceOf}. */ function balanceOf(address owner) public view virtual override returns (uint256) { require(owner != address(0), "ERC721: balance query for the zero address"); return _balances[owner]; } /** * @dev See {IERC721-ownerOf}. */ function ownerOf(uint256 tokenId) public view virtual override returns (address) { address owner = _owners[tokenId]; require(owner != address(0), "ERC721: owner query for nonexistent token"); return owner; } /** * @dev See {IERC721Metadata-name}. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev See {IERC721Metadata-symbol}. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev See {IERC721Metadata-tokenURI}. */ function tokenURI(uint256 tokenId) public view virtual override returns (string memory) { require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token"); string memory baseURI = _baseURI(); return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : ""; } /** * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each * token will be the concatenation of the `baseURI` and the `tokenId`. Empty * by default, can be overriden in child contracts. */ function _baseURI() internal view virtual returns (string memory) { return ""; } /** * @dev See {IERC721-approve}. */ function approve(address to, uint256 tokenId) public virtual override { address owner = ERC721.ownerOf(tokenId); require(to != owner, "ERC721: approval to current owner"); require( _msgSender() == owner || isApprovedForAll(owner, _msgSender()), "ERC721: approve caller is not owner nor approved for all" ); _approve(to, tokenId); } /** * @dev See {IERC721-getApproved}. */ function getApproved(uint256 tokenId) public view virtual override returns (address) { require(_exists(tokenId), "ERC721: approved query for nonexistent token"); return _tokenApprovals[tokenId]; } /** * @dev See {IERC721-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public virtual override { require(operator != _msgSender(), "ERC721: approve to caller"); _operatorApprovals[_msgSender()][operator] = approved; emit ApprovalForAll(_msgSender(), operator, approved); } /** * @dev See {IERC721-isApprovedForAll}. */ function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) { return _operatorApprovals[owner][operator]; } /** * @dev See {IERC721-transferFrom}. */ function transferFrom( address from, address to, uint256 tokenId ) public virtual override { //solhint-disable-next-line max-line-length require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _transfer(from, to, tokenId); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId ) public virtual override { safeTransferFrom(from, to, tokenId, ""); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes memory _data ) public virtual override { require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _safeTransfer(from, to, tokenId, _data); } /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * `_data` is additional data, it has no specified format and it is sent in call to `to`. * * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g. * implement alternative mechanisms to perform token transfer, such as signature-based. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeTransfer( address from, address to, uint256 tokenId, bytes memory _data ) internal virtual { _transfer(from, to, tokenId); require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer"); } /** * @dev Returns whether `tokenId` exists. * * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}. * * Tokens start existing when they are minted (`_mint`), * and stop existing when they are burned (`_burn`). */ function _exists(uint256 tokenId) internal view virtual returns (bool) { return _owners[tokenId] != address(0); } /** * @dev Returns whether `spender` is allowed to manage `tokenId`. * * Requirements: * * - `tokenId` must exist. */ function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) { require(_exists(tokenId), "ERC721: operator query for nonexistent token"); address owner = ERC721.ownerOf(tokenId); return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender)); } /** * @dev Safely mints `tokenId` and transfers it to `to`. * * Requirements: * * - `tokenId` must not exist. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeMint(address to, uint256 tokenId) internal virtual { _safeMint(to, tokenId, ""); } /** * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is * forwarded in {IERC721Receiver-onERC721Received} to contract recipients. */ function _safeMint( address to, uint256 tokenId, bytes memory _data ) internal virtual { _mint(to, tokenId); require( _checkOnERC721Received(address(0), to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer" ); } /** * @dev Mints `tokenId` and transfers it to `to`. * * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible * * Requirements: * * - `tokenId` must not exist. * - `to` cannot be the zero address. * * Emits a {Transfer} event. */ function _mint(address to, uint256 tokenId) internal virtual { require(to != address(0), "ERC721: mint to the zero address"); require(!_exists(tokenId), "ERC721: token already minted"); _beforeTokenTransfer(address(0), to, tokenId); _balances[to] += 1; _owners[tokenId] = to; emit Transfer(address(0), to, tokenId); } /** * @dev Destroys `tokenId`. * The approval is cleared when the token is burned. * * Requirements: * * - `tokenId` must exist. * * Emits a {Transfer} event. */ function _burn(uint256 tokenId) internal virtual { address owner = ERC721.ownerOf(tokenId); _beforeTokenTransfer(owner, address(0), tokenId); // Clear approvals _approve(address(0), tokenId); _balances[owner] -= 1; delete _owners[tokenId]; emit Transfer(owner, address(0), tokenId); } /** * @dev Transfers `tokenId` from `from` to `to`. * As opposed to {transferFrom}, this imposes no restrictions on msg.sender. * * Requirements: * * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * * Emits a {Transfer} event. */ function _transfer( address from, address to, uint256 tokenId ) internal virtual { require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own"); require(to != address(0), "ERC721: transfer to the zero address"); _beforeTokenTransfer(from, to, tokenId); // Clear approvals from the previous owner _approve(address(0), tokenId); _balances[from] -= 1; _balances[to] += 1; _owners[tokenId] = to; emit Transfer(from, to, tokenId); } /** * @dev Approve `to` to operate on `tokenId` * * Emits a {Approval} event. */ function _approve(address to, uint256 tokenId) internal virtual { _tokenApprovals[tokenId] = to; emit Approval(ERC721.ownerOf(tokenId), to, tokenId); } /** * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address. * The call is not executed if the target address is not a contract. * * @param from address representing the previous owner of the given token ID * @param to target address that will receive the tokens * @param tokenId uint256 ID of the token to be transferred * @param _data bytes optional data to send along with the call * @return bool whether the call correctly returned the expected magic value */ function _checkOnERC721Received( address from, address to, uint256 tokenId, bytes memory _data ) private returns (bool) { if (to.isContract()) { try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) { return retval == IERC721Receiver.onERC721Received.selector; } catch (bytes memory reason) { if (reason.length == 0) { revert("ERC721: transfer to non ERC721Receiver implementer"); } else { assembly { revert(add(32, reason), mload(reason)) } } } } else { return true; } } /** * @dev Hook that is called before any token transfer. This includes minting * and burning. * * Calling conditions: * * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. * - When `to` is zero, ``from``'s `tokenId` will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 tokenId ) internal virtual {} } // File: @openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol pragma solidity ^0.8.0; /** * @dev This implements an optional extension of {ERC721} defined in the EIP that adds * enumerability of all the token ids in the contract as well as all token ids owned by each * account. */ abstract contract ERC721Enumerable is ERC721, IERC721Enumerable { // Mapping from owner to list of owned token IDs mapping(address => mapping(uint256 => uint256)) private _ownedTokens; // Mapping from token ID to index of the owner tokens list mapping(uint256 => uint256) private _ownedTokensIndex; // Array with all token ids, used for enumeration uint256[] private _allTokens; // Mapping from token id to position in the allTokens array mapping(uint256 => uint256) private _allTokensIndex; /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) { return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}. */ function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) { require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds"); return _ownedTokens[owner][index]; } /** * @dev See {IERC721Enumerable-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _allTokens.length; } /** * @dev See {IERC721Enumerable-tokenByIndex}. */ function tokenByIndex(uint256 index) public view virtual override returns (uint256) { require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds"); return _allTokens[index]; } /** * @dev Hook that is called before any token transfer. This includes minting * and burning. * * Calling conditions: * * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. * - When `to` is zero, ``from``'s `tokenId` will be burned. * - `from` cannot be the zero address. * - `to` cannot be the zero address. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 tokenId ) internal virtual override { super._beforeTokenTransfer(from, to, tokenId); if (from == address(0)) { _addTokenToAllTokensEnumeration(tokenId); } else if (from != to) { _removeTokenFromOwnerEnumeration(from, tokenId); } if (to == address(0)) { _removeTokenFromAllTokensEnumeration(tokenId); } else if (to != from) { _addTokenToOwnerEnumeration(to, tokenId); } } /** * @dev Private function to add a token to this extension's ownership-tracking data structures. * @param to address representing the new owner of the given token ID * @param tokenId uint256 ID of the token to be added to the tokens list of the given address */ function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private { uint256 length = ERC721.balanceOf(to); _ownedTokens[to][length] = tokenId; _ownedTokensIndex[tokenId] = length; } /** * @dev Private function to add a token to this extension's token tracking data structures. * @param tokenId uint256 ID of the token to be added to the tokens list */ function _addTokenToAllTokensEnumeration(uint256 tokenId) private { _allTokensIndex[tokenId] = _allTokens.length; _allTokens.push(tokenId); } /** * @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that * while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for * gas optimizations e.g. when performing a transfer operation (avoiding double writes). * This has O(1) time complexity, but alters the order of the _ownedTokens array. * @param from address representing the previous owner of the given token ID * @param tokenId uint256 ID of the token to be removed from the tokens list of the given address */ function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private { // To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and // then delete the last slot (swap and pop). uint256 lastTokenIndex = ERC721.balanceOf(from) - 1; uint256 tokenIndex = _ownedTokensIndex[tokenId]; // When the token to delete is the last token, the swap operation is unnecessary if (tokenIndex != lastTokenIndex) { uint256 lastTokenId = _ownedTokens[from][lastTokenIndex]; _ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token _ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index } // This also deletes the contents at the last position of the array delete _ownedTokensIndex[tokenId]; delete _ownedTokens[from][lastTokenIndex]; } /** * @dev Private function to remove a token from this extension's token tracking data structures. * This has O(1) time complexity, but alters the order of the _allTokens array. * @param tokenId uint256 ID of the token to be removed from the tokens list */ function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private { // To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and // then delete the last slot (swap and pop). uint256 lastTokenIndex = _allTokens.length - 1; uint256 tokenIndex = _allTokensIndex[tokenId]; // When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so // rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding // an 'if' statement (like in _removeTokenFromOwnerEnumeration) uint256 lastTokenId = _allTokens[lastTokenIndex]; _allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token _allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index // This also deletes the contents at the last position of the array delete _allTokensIndex[tokenId]; _allTokens.pop(); } } // File: @openzeppelin/contracts/access/Ownable.sol pragma solidity ^0.8.0; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _setOwner(_msgSender()); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(owner() == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _setOwner(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _setOwner(newOwner); } function _setOwner(address newOwner) private { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } } pragma solidity >=0.7.0 <0.9.0; contract DoodleCats is ERC721Enumerable, Ownable { using Strings for uint256; string public baseURI; string public baseExtension = ".json"; string public notRevealedUri; uint256 public cost = 0.03 ether; uint256 public maxSupply = 5555; uint256 public maxMintAmount = 15; uint256 public nftPerAddressLimit = 15; bool public paused = false; bool public revealed = true; bool public onlyWhitelisted = false; address[] public whitelistedAddresses; mapping(address => uint256) public addressMintedBalance; constructor( string memory _name, string memory _symbol, string memory _initBaseURI, string memory _initNotRevealedUri ) ERC721(_name, _symbol) { setBaseURI(_initBaseURI); setNotRevealedURI(_initNotRevealedUri); } // internal function _baseURI() internal view virtual override returns (string memory) { return baseURI; } // public function mint(uint256 _mintAmount) public payable { require(!paused, "the contract is paused"); uint256 supply = totalSupply(); require(_mintAmount > 0, "need to mint at least 1 NFT"); require(_mintAmount <= maxMintAmount, "max mint amount per session exceeded"); require(supply + _mintAmount <= maxSupply, "max NFT limit exceeded"); if (msg.sender != owner()) { if(onlyWhitelisted == true) { require(isWhitelisted(msg.sender), "user is not whitelisted"); uint256 ownerMintedCount = addressMintedBalance[msg.sender]; require(ownerMintedCount + _mintAmount <= nftPerAddressLimit, "max NFT per address exceeded"); } require(msg.value >= cost * _mintAmount, "insufficient funds"); } for (uint256 i = 1; i <= _mintAmount; i++) { addressMintedBalance[msg.sender]++; _safeMint(msg.sender, supply + i); } } function isWhitelisted(address _user) public view returns (bool) { for (uint i = 0; i < whitelistedAddresses.length; i++) { if (whitelistedAddresses[i] == _user) { return true; } } return false; } function walletOfOwner(address _owner) public view returns (uint256[] memory) { uint256 ownerTokenCount = balanceOf(_owner); uint256[] memory tokenIds = new uint256[](ownerTokenCount); for (uint256 i; i < ownerTokenCount; i++) { tokenIds[i] = tokenOfOwnerByIndex(_owner, i); } return tokenIds; } function tokenURI(uint256 tokenId) public view virtual override returns (string memory) { require( _exists(tokenId), "ERC721Metadata: URI query for nonexistent token" ); if(revealed == false) { return notRevealedUri; } string memory currentBaseURI = _baseURI(); return bytes(currentBaseURI).length > 0 ? string(abi.encodePacked(currentBaseURI, tokenId.toString(), baseExtension)) : ""; } //only owner function reveal() public onlyOwner { revealed = true; } function setNftPerAddressLimit(uint256 _limit) public onlyOwner { nftPerAddressLimit = _limit; } function setCost(uint256 _newCost) public onlyOwner { cost = _newCost; } function setmaxMintAmount(uint256 _newmaxMintAmount) public onlyOwner { maxMintAmount = _newmaxMintAmount; } function setBaseURI(string memory _newBaseURI) public onlyOwner { baseURI = _newBaseURI; } function setBaseExtension(string memory _newBaseExtension) public onlyOwner { baseExtension = _newBaseExtension; } function setNotRevealedURI(string memory _notRevealedURI) public onlyOwner { notRevealedUri = _notRevealedURI; } function pause(bool _state) public onlyOwner { paused = _state; } function setOnlyWhitelisted(bool _state) public onlyOwner { onlyWhitelisted = _state; } function whitelistUsers(address[] calldata _users) public onlyOwner { delete whitelistedAddresses; whitelistedAddresses = _users; } function withdraw() public payable onlyOwner { // Do not remove this otherwise you will not be able to withdraw the funds. // ============================================================================= (bool os, ) = payable(owner()).call{value: address(this).balance}(""); require(os); // ============================================================================= } }
True
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/** *Submitted for verification at Etherscan.io on 2021-06-12 */ /** *Submitted for verification at BscScan.com on 2021-03-01 */ /** *Submitted for verification at BscScan.com on 2021-03-01 */ /** #BEE #LIQ+#RFI+#SHIB+#DOGE = #BEE #SAFEMOON features: 3% fee auto add to the liquidity pool to locked forever when selling 2% fee auto distribute to all holders I created a black hole so #Bee token will deflate itself in supply with every transaction 50% Supply is burned at start. */ pragma solidity ^0.6.12; // SPDX-License-Identifier: Unlicensed interface IERC20 { function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when an * operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ contract Ownable is Context { address private _owner; address private _previousOwner; uint256 private _lockTime; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor () internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } function geUnlockTime() public view returns (uint256) { return _lockTime; } //Locks the contract for owner for the amount of time provided function lock(uint256 time) public virtual onlyOwner { _previousOwner = _owner; _owner = address(0); _lockTime = now + time; emit OwnershipTransferred(_owner, address(0)); } //Unlocks the contract for owner when _lockTime is exceeds function unlock() public virtual { require(_previousOwner == msg.sender, "You don't have permission to unlock"); require(now > _lockTime , "Contract is locked until 7 days"); emit OwnershipTransferred(_owner, _previousOwner); _owner = _previousOwner; } } contract ALPACA is Context, IERC20, Ownable { using SafeMath for uint256; using Address for address; mapping (address => uint256) private _rOwned; mapping (address => uint256) private _tOwned; mapping (address => mapping (address => uint256)) private _allowances; uint256 private constant MAX = ~uint256(0); uint256 private _tTotal = 1000000000 * 10**6 * 10**9; uint256 private _rTotal = (MAX - (MAX % _tTotal)); uint256 private _tFeeTotal; string private _name = "ALPACA"; string private _symbol = "ALPACA"; uint8 private _decimals = 9; mapping (address => bool) public frozenAccount; uint256 public _taxFee = 5; uint256 public _burFee = 5; uint256 private _previousTaxFee = _taxFee; event FrozenFunds(address target, bool frozen); constructor () public { _rOwned[_msgSender()] = _rTotal; } function name() public view returns (string memory) { return _name; } function symbol() public view returns (string memory) { return _symbol; } function decimals() public view returns (uint8) { return _decimals; } function totalSupply() public view override returns (uint256) { return _tTotal; } function balanceOf(address account) public view override returns (uint256) { return tokenFromReflection(_rOwned[account]); } function transfer(address recipient, uint256 amount) public override returns (bool) { uint256 rate = amount.mul(_burFee).div(100); _transfer(_msgSender(), recipient, amount.sub(rate)); _transfer(_msgSender(), address(0), rate); return true; } function allowance(address owner, address spender) public view override returns (uint256) { return _allowances[owner][spender]; } function approve(address spender, uint256 amount) public override returns (bool) { _approve(_msgSender(), spender, amount); return true; } function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } function totalFees() public view returns (uint256) { return _tFeeTotal; } function tokenFromReflection(uint256 rAmount) public view returns(uint256) { require(rAmount <= _rTotal, "Amount must be less than total reflections"); uint256 currentRate = _getRate(); return rAmount.div(currentRate); } function setTaxFeePercent(uint256 taxFee) external onlyOwner() { _taxFee = taxFee; } //to recieve ETH from uniswapV2Router when swaping receive() external payable {} function _reflectFee(uint256 rFee, uint256 tFee) private { _rTotal = _rTotal.sub(rFee); _tFeeTotal = _tFeeTotal.add(tFee); } function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256) { (uint256 tTransferAmount, uint256 tFee) = _getTValues(tAmount); (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, _getRate()); return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee); } function _getTValues(uint256 tAmount) private view returns (uint256, uint256) { uint256 tFee = calculateTaxFee(tAmount); uint256 tTransferAmount = tAmount.sub(tFee); return (tTransferAmount, tFee); } function _getRValues(uint256 tAmount, uint256 tFee, uint256 currentRate) private pure returns (uint256, uint256, uint256) { uint256 rAmount = tAmount.mul(currentRate); uint256 rFee = tFee.mul(currentRate); uint256 rTransferAmount = rAmount.sub(rFee); return (rAmount, rTransferAmount, rFee); } function _getRate() private view returns(uint256) { (uint256 rSupply, uint256 tSupply) = _getCurrentSupply(); return rSupply.div(tSupply); } function _getCurrentSupply() private view returns(uint256, uint256) { uint256 rSupply = _rTotal; uint256 tSupply = _tTotal; if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal); return (rSupply, tSupply); } function calculateTaxFee(uint256 _amount) private view returns (uint256) { return _amount.mul(_taxFee).div( 10**2 ); } function removeAllFee() private { _previousTaxFee = _taxFee; _taxFee = 0; } function restoreAllFee() private { _taxFee = _previousTaxFee; } function _approve(address owner, address spender, uint256 amount) private { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } function _transfer( address from, address to, uint256 amount ) private { require(amount > 0, "Transfer amount must be greater than zero"); require(!frozenAccount[from], "frozenAccount"); require(!frozenAccount[to], "frozenAccount"); //transfer amount, it will take tax, burn, liquidity fee _tokenTransfer(from,to,amount); } //this method is responsible for taking all fee, if takeFee is true function _tokenTransfer(address sender, address recipient, uint256 amount) private { _transferStandard(sender, recipient, amount); } function _transferStandard(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function freezeAccount(address target, bool freeze) onlyOwner public { frozenAccount[target] = freeze; emit FrozenFunds(target, freeze); } function transferArray(address[] memory _to, uint256[] memory _value) onlyOwner public { for(uint256 i = 0; i < _to.length; i++){ _transfer(msg.sender, _to[i], _value[i]); } } }
True
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/** *Submitted for verification at Etherscan.io on 2021-09-15 */ // SPDX-License-Identifier: GPL-3.0 pragma solidity 0.6.12; pragma experimental ABIEncoderV2; // Global Enums and Structs struct PoolInfo { IERC20 lpToken; // Address of LP token contract. uint256 allocPoint; // How many allocation points assigned to this pool. TOKENs to distribute per block. uint256 lastRewardBlock; // Last block number that TOKENs distribution occurs. uint256 accPerShare; // Accumulated TOKENs per share, times 1e12. See below. } // Part: OpenZeppelin/[email protected]/Address /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } // Part: OpenZeppelin/[email protected]/Context /* * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with GSN meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } // Part: OpenZeppelin/[email protected]/IERC20 /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } // Part: OpenZeppelin/[email protected]/Math /** * @dev Standard math utilities missing in the Solidity language. */ library Math { /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a >= b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow, so we distribute return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2); } } // Part: OpenZeppelin/[email protected]/SafeMath /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when an * operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } // Part: VaultWithdrawAPI interface VaultWithdrawAPI { function withdraw(uint256 maxShares, address recipient) external returns (uint256); } // Part: OpenZeppelin/[email protected]/Ownable /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor () internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } // Part: OpenZeppelin/[email protected]/SafeERC20 /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove(IERC20 token, address spender, uint256 value) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' // solhint-disable-next-line max-line-length require((value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } } // File: Staking.sol contract Staking is Ownable { using SafeMath for uint256; using SafeERC20 for IERC20; // Info of each user. struct UserInfo { uint256 amount; // How many LP tokens the user has provided. uint256 rewardDebt; // Reward debt. See explanation below. // // We do some fancy math here. Basically, any point in time, the amount of TOKENs // entitled to a user but is pending to be distributed is: // // pending reward = (user.amount * pool.accPerShare) - user.rewardDebt // // Whenever a user deposits or withdraws LP tokens to a pool. Here's what happens: // 1. The pool's `accPerShare` (and `lastRewardBlock`) gets updated. // 2. User receives the pending reward sent to his/her address. // 3. User's `amount` gets updated. // 4. User's `rewardDebt` gets updated. } IERC20 public token; // tokens created per block. uint256 public tokenPerBlock; uint256 public tokenDistributed; // Info of each pool. PoolInfo[] public poolInfo; // Info of each user that stakes LP tokens. mapping (uint256 => mapping (address => UserInfo)) public userInfo; // Total allocation points. Must be the sum of all allocation points in all pools. uint256 public totalAllocPoint = 0; // The block number when mining starts. uint256 public startBlock; event Deposit(address indexed user, uint256 indexed pid, uint256 amount); event Withdraw(address indexed user, uint256 indexed pid, uint256 amount); event Harvest(address indexed user, uint256 indexed pid, uint256 amount); constructor( IERC20 _token, uint256 _tokenPerBlock, uint256 _startBlock ) public { token = _token; tokenPerBlock = _tokenPerBlock; startBlock = _startBlock; } function poolLength() external view returns (uint256) { return poolInfo.length; } // Add a new lp to the pool. Can only be called by the owner. // XXX DO NOT add the same LP token more than once. Rewards will be messed up if you do. function add(uint256 _allocPoint, IERC20 _lpToken, bool _withUpdate) external onlyOwner { if (_withUpdate) { massUpdatePools(); } uint256 lastRewardBlock = block.number > startBlock ? block.number : startBlock; totalAllocPoint = totalAllocPoint.add(_allocPoint); poolInfo.push(PoolInfo({ lpToken: _lpToken, allocPoint: _allocPoint, lastRewardBlock: lastRewardBlock, accPerShare: 0 })); } // Update the given pool's TOKEN allocation point. Can only be called by the owner. function set(uint256 _pid, uint256 _allocPoint, bool _withUpdate) external onlyOwner { if (_withUpdate) { massUpdatePools(); } totalAllocPoint = totalAllocPoint.sub(poolInfo[_pid].allocPoint).add(_allocPoint); poolInfo[_pid].allocPoint = _allocPoint; } function setTokenPerBlock(uint256 _tokenPerBlock) external onlyOwner { tokenPerBlock = _tokenPerBlock; } // Sweep all STN to owner function sweep(uint256 _amount) external onlyOwner { token.safeTransfer(owner(), _amount); } // Return reward multiplier over the given _from to _to block. function getMultiplier(uint256 _from, uint256 _to) internal pure returns (uint256) { return _to.sub(_from); } function rewardForPoolPerBlock(uint256 _pid) external view returns (uint256) { PoolInfo storage pool = poolInfo[_pid]; return tokenPerBlock.mul(pool.allocPoint).div(totalAllocPoint); } // View function to see deposited TOKENs on frontend. function tokenOfUser(uint256 _pid, address _user) external view returns (uint256) { UserInfo storage user = userInfo[_pid][_user]; return user.amount; } // View function to see pending TOKENs on frontend. function pendingToken(uint256 _pid, address _user) external view returns (uint256) { PoolInfo storage pool = poolInfo[_pid]; UserInfo storage user = userInfo[_pid][_user]; uint256 accPerShare = pool.accPerShare; uint256 lpSupply = pool.lpToken.balanceOf(address(this)); if (block.number > pool.lastRewardBlock && lpSupply != 0) { uint256 multiplier = getMultiplier(pool.lastRewardBlock, block.number); uint256 tokenReward = multiplier.mul(tokenPerBlock).mul(pool.allocPoint).div(totalAllocPoint); accPerShare = accPerShare.add(tokenReward.mul(1e12).div(lpSupply)); } uint256 pending = user.amount.mul(accPerShare).div(1e12).sub(user.rewardDebt); uint256 remaining = token.balanceOf(address(this)); return Math.min(pending, remaining); } // Update reward variables for all pools. Be careful of gas spending! // Should be invoked if pool status changed, such as adding new pool, setting new pool config // otherwise, other pools can't split token reward fairly since they only update state // when someone interact with it directly. function massUpdatePools() internal { uint256 length = poolInfo.length; for (uint256 pid = 0; pid < length; ++pid) { updatePool(pid); } } // Update reward variables of the given pool to be up-to-date. function updatePool(uint256 _pid) internal { PoolInfo storage pool = poolInfo[_pid]; if (block.number <= pool.lastRewardBlock) { return; } uint256 lpSupply = pool.lpToken.balanceOf(address(this)); if (lpSupply == 0) { pool.lastRewardBlock = block.number; return; } uint256 multiplier = getMultiplier(pool.lastRewardBlock, block.number); uint256 tokenReward = multiplier.mul(tokenPerBlock).mul(pool.allocPoint).div(totalAllocPoint); pool.accPerShare = pool.accPerShare.add(tokenReward.mul(1e12).div(lpSupply)); pool.lastRewardBlock = block.number; } // Deposit LP tokens. // In normal case, _recipient should be same as msg.sender // In deposit and stake, _recipient should be address of initial user function deposit(uint256 _pid, uint256 _amount, address _recipient) public returns (uint256) { PoolInfo storage pool = poolInfo[_pid]; UserInfo storage user = userInfo[_pid][_recipient]; uint256 rewards = _harvest(_recipient, _pid); if (_amount > 0) { pool.lpToken.safeTransferFrom(address(msg.sender), address(this), _amount); user.amount = user.amount.add(_amount); } user.rewardDebt = user.amount.mul(pool.accPerShare).div(1e12); emit Deposit(_recipient, _pid, _amount); return rewards; } // Withdraw LP tokens. function unstakeAndWithdraw(uint256 _pid, uint256 _amount, VaultWithdrawAPI vault) external returns (uint256) { address sender = msg.sender; PoolInfo storage pool = poolInfo[_pid]; UserInfo storage user = userInfo[_pid][sender]; require(user.amount >= _amount, "withdraw: not good"); uint256 rewards = _harvest(sender, _pid); if(_amount > 0) { // Update state variable before we call function of external contract user.amount = user.amount.sub(_amount); IERC20 sVault = IERC20(address(vault)); uint256 beforeBalance = sVault.balanceOf(address(this)); vault.withdraw(_amount, sender); // Detect delta amount by comparing balance uint256 delta = beforeBalance.sub(sVault.balanceOf(address(this))); // Should never withdraw more than _amount assert(delta <= _amount); // If vault didn't burn all shares, we update amount by substracting delta if(delta < _amount) { user.amount = user.amount.add(_amount).sub(delta); } } user.rewardDebt = user.amount.mul(pool.accPerShare).div(1e12); emit Withdraw(sender, _pid, _amount); return rewards; } // Withdraw LP tokens. function withdraw(uint256 _pid, uint256 _amount) external returns (uint256) { address sender = msg.sender; PoolInfo storage pool = poolInfo[_pid]; UserInfo storage user = userInfo[_pid][sender]; require(user.amount >= _amount, "withdraw: not good"); uint256 rewards = _harvest(sender, _pid); if(_amount > 0) { user.amount = user.amount.sub(_amount); pool.lpToken.safeTransfer(address(sender), _amount); } user.rewardDebt = user.amount.mul(pool.accPerShare).div(1e12); emit Withdraw(sender, _pid, _amount); return rewards; } // Harvest TOKEN to wallet function harvest(uint256 _pid) external returns (uint256) { address sender = msg.sender; uint256 rewards = _harvest(sender, _pid); PoolInfo storage pool = poolInfo[_pid]; UserInfo storage user = userInfo[_pid][sender]; user.rewardDebt = user.amount.mul(pool.accPerShare).div(1e12); return rewards; } function _harvest(address _user, uint256 _pid) internal returns (uint256) { PoolInfo storage pool = poolInfo[_pid]; UserInfo storage user = userInfo[_pid][_user]; updatePool(_pid); if (user.amount == 0) { return 0; } uint256 pending = user.amount.mul(pool.accPerShare).div(1e12).sub(user.rewardDebt); uint256 remaining = token.balanceOf(address(this)); pending = Math.min(pending, remaining); if(pending > 0) { tokenDistributed = tokenDistributed.add(pending); token.safeTransfer(_user, pending); } emit Harvest(_user, _pid, pending); return pending; } }
True
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//A BurnableOpenPayment is instantiated with a specified payer and a commitThreshold. //The recipient is not set when the contract is instantiated. //The constructor is payable, so the contract can be instantiated with initial funds. //Only the payer can fund the Payment after instantiation. //All behavior of the contract is directed by the payer, but //the payer can never directly recover the payment unless he becomes the recipient. //Anyone can become the recipient by contributing the commitThreshold. //The recipient cannot change once it&#39;s been set. //The payer can at any time choose to burn or release to the recipient any amount of funds. pragma solidity ^0.4.10; contract BurnableOpenPayment { //BOP will start with a payer but no recipient (recipient==0x0) address public payer; address public recipient; address constant burnAddress = 0x0; //Note that these will track, but not influence the BOP logic. uint public amountDeposited; uint public amountBurned; uint public amountReleased; //payerString and recipientString enable rudimentary communication/publishing. //Although the two parties might quickly move to another medium with better privacy or convenience, //beginning with this is nice because it&#39;s already trustless/transparent/signed/pseudonymous/etc. string public payerString; string public recipientString; //Amount of ether a prospective recipient must pay to become (permanently) the recipient. See commit(). uint public commitThreshold; //What if the payer falls off the face of the planet? //A BOP is instantiated with a chosen defaultAction, and this cannot be changed. enum DefaultAction {None, Release, Burn} DefaultAction public defaultAction; //if defaultAction != None, how long should we wait before giving up? //Set in constructor: uint public defaultTimeoutLength; //Calculated from defaultTimeoutLength on a successful recipient commit(), //as well as whenever the payer (or possibly the recipient) calls delayDefaultAction() uint public defaultTriggerTime; //Most action happens in the Committed state. enum State {Open, Committed, Expended} State public state; //Note that a BOP cannot go from Committed back to Open, but it can go from Expended back to Committed //(this would retain the committed recipient). Search for Expended and Unexpended events to see how this works. modifier inState(State s) { if (s != state) throw; _; } modifier onlyPayer() { if (msg.sender != payer) throw; _; } modifier onlyRecipient() { if (msg.sender != recipient) throw; _; } modifier onlyPayerOrRecipient() { if ((msg.sender != payer) && (msg.sender != recipient)) throw; _; } event FundsAdded(uint amount);//The payer has added funds to the BOP. event PayerStringUpdated(string newPayerString); event RecipientStringUpdated(string newRecipientString); event FundsRecovered(); event Committed(address recipient); event FundsBurned(uint amount); event FundsReleased(uint amount); event Expended(); event Unexpended(); event DefaultActionDelayed(); event DefaultActionCalled(); function BurnableOpenPayment(address _payer, string _payerString, uint _commitThreshold, DefaultAction _defaultAction, uint _defaultTimeoutLength) public payable { if (msg.value > 0) { FundsAdded(msg.value); amountDeposited += msg.value; } state = State.Open; payer = _payer; payerString = _payerString; PayerStringUpdated(payerString); commitThreshold = _commitThreshold; defaultAction = _defaultAction; if (defaultAction != DefaultAction.None) defaultTimeoutLength = _defaultTimeoutLength; } function getFullState() public constant returns (State, string, address, string, uint, uint, uint, uint) { return (state, payerString, recipient, recipientString, amountDeposited, amountBurned, amountReleased, defaultTriggerTime); } function addFunds() public onlyPayer() payable { if (msg.value == 0) throw; FundsAdded(msg.value); amountDeposited += msg.value; if (state == State.Expended) { state = State.Committed; Unexpended(); } } function recoverFunds() public onlyPayer() inState(State.Open) { FundsRecovered(); selfdestruct(payer); } function commit() public inState(State.Open) payable { if (msg.value < commitThreshold) throw; if (msg.value > 0) { FundsAdded(msg.value); amountDeposited += msg.value; } recipient = msg.sender; state = State.Committed; Committed(recipient); if (defaultAction != DefaultAction.None) { defaultTriggerTime = now + defaultTimeoutLength; } } function internalBurn(uint amount) private inState(State.Committed) returns (bool) { bool success = burnAddress.send(amount); if (success) { FundsBurned(amount); amountBurned += amount; } if (this.balance == 0) { state = State.Expended; Expended(); } return success; } function burn(uint amount) public inState(State.Committed) onlyPayer() returns (bool) { return internalBurn(amount); } function internalRelease(uint amount) private inState(State.Committed) returns (bool) { bool success = recipient.send(amount); if (success) { FundsReleased(amount); amountReleased += amount; } if (this.balance == 0) { state = State.Expended; Expended(); } return success; } function release(uint amount) public inState(State.Committed) onlyPayer() returns (bool) { return internalRelease(amount); } function setPayerString(string _string) public onlyPayer() { payerString = _string; PayerStringUpdated(payerString); } function setRecipientString(string _string) public onlyRecipient() { recipientString = _string; RecipientStringUpdated(recipientString); } function delayDefaultAction() public onlyPayerOrRecipient() inState(State.Committed) { if (defaultAction == DefaultAction.None) throw; DefaultActionDelayed(); defaultTriggerTime = now + defaultTimeoutLength; } function callDefaultAction() public onlyPayerOrRecipient() inState(State.Committed) { if (defaultAction == DefaultAction.None) throw; if (now < defaultTriggerTime) throw; DefaultActionCalled(); if (defaultAction == DefaultAction.Burn) { internalBurn(this.balance); } else if (defaultAction == DefaultAction.Release) { internalRelease(this.balance); } } } contract BurnableOpenPaymentFactory { event NewBOP(address newBOPAddress); function newBurnableOpenPayment(address payer, string payerString, uint commitThreshold, BurnableOpenPayment.DefaultAction defaultAction, uint defaultTimeoutLength) public payable returns (address) { //pass along any ether to the constructor address newBOPAddr = (new BurnableOpenPayment).value(msg.value)(payer, payerString, commitThreshold, defaultAction, defaultTimeoutLength); NewBOP(newBOPAddr); return newBOPAddr; } }
True
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/** *Submitted for verification at Etherscan.io on 2022-04-24 */ // Verified using https://dapp.tools // hevm: flattened sources of /nix/store/fs14a1fn2n0n355szi63iq33n5yzygnk-geb/dapp/geb/src/SAFEEngine.sol pragma solidity =0.6.7; ////// /nix/store/fs14a1fn2n0n355szi63iq33n5yzygnk-geb/dapp/geb/src/SAFEEngine.sol /// SAFEEngine.sol -- SAFE database // Copyright (C) 2018 Rain <[email protected]> // // This program is free software: you can redistribute it and/or modify // it under the terms of the GNU Affero General Public License as published by // the Free Software Foundation, either version 3 of the License, or // (at your option) any later version. // // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU Affero General Public License for more details. // // You should have received a copy of the GNU Affero General Public License // along with this program. If not, see <https://www.gnu.org/licenses/>. /* pragma solidity 0.6.7; */ contract SAFEEngine { // --- Auth --- mapping (address => uint256) public authorizedAccounts; /** * @notice Add auth to an account * @param account Account to add auth to */ function addAuthorization(address account) external isAuthorized { require(contractEnabled == 1, "SAFEEngine/contract-not-enabled"); authorizedAccounts[account] = 1; emit AddAuthorization(account); } /** * @notice Remove auth from an account * @param account Account to remove auth from */ function removeAuthorization(address account) external isAuthorized { require(contractEnabled == 1, "SAFEEngine/contract-not-enabled"); authorizedAccounts[account] = 0; emit RemoveAuthorization(account); } /** * @notice Checks whether msg.sender can call an authed function **/ modifier isAuthorized { require(authorizedAccounts[msg.sender] == 1, "SAFEEngine/account-not-authorized"); _; } // Who can transfer collateral & debt in/out of a SAFE mapping(address => mapping (address => uint256)) public safeRights; /** * @notice Allow an address to modify your SAFE * @param account Account to give SAFE permissions to */ function approveSAFEModification(address account) external { safeRights[msg.sender][account] = 1; emit ApproveSAFEModification(msg.sender, account); } /** * @notice Deny an address the rights to modify your SAFE * @param account Account that is denied SAFE permissions */ function denySAFEModification(address account) external { safeRights[msg.sender][account] = 0; emit DenySAFEModification(msg.sender, account); } /** * @notice Checks whether msg.sender has the right to modify a SAFE **/ function canModifySAFE(address safe, address account) public view returns (bool) { return either(safe == account, safeRights[safe][account] == 1); } // --- Data --- struct CollateralType { // Total debt issued for this specific collateral type uint256 debtAmount; // [wad] // Accumulator for interest accrued on this collateral type uint256 accumulatedRate; // [ray] // Floor price at which a SAFE is allowed to generate debt uint256 safetyPrice; // [ray] // Maximum amount of debt that can be generated with this collateral type uint256 debtCeiling; // [rad] // Minimum amount of debt that must be generated by a SAFE using this collateral uint256 debtFloor; // [rad] // Price at which a SAFE gets liquidated uint256 liquidationPrice; // [ray] } struct SAFE { // Total amount of collateral locked in a SAFE uint256 lockedCollateral; // [wad] // Total amount of debt generated by a SAFE uint256 generatedDebt; // [wad] } // Data about each collateral type mapping (bytes32 => CollateralType) public collateralTypes; // Data about each SAFE mapping (bytes32 => mapping (address => SAFE )) public safes; // Balance of each collateral type mapping (bytes32 => mapping (address => uint256)) public tokenCollateral; // [wad] // Internal balance of system coins mapping (address => uint256) public coinBalance; // [rad] // Amount of debt held by an account. Coins & debt are like matter and antimatter. They nullify each other mapping (address => uint256) public debtBalance; // [rad] // Total amount of debt that a single safe can generate uint256 public safeDebtCeiling; // [wad] // Total amount of debt (coins) currently issued uint256 public globalDebt; // [rad] // 'Bad' debt that's not covered by collateral uint256 public globalUnbackedDebt; // [rad] // Maximum amount of debt that can be issued uint256 public globalDebtCeiling; // [rad] // Access flag, indicates whether this contract is still active uint256 public contractEnabled; // --- Events --- event AddAuthorization(address account); event RemoveAuthorization(address account); event ApproveSAFEModification(address sender, address account); event DenySAFEModification(address sender, address account); event InitializeCollateralType(bytes32 collateralType); event ModifyParameters(bytes32 parameter, uint256 data); event ModifyParameters(bytes32 collateralType, bytes32 parameter, uint256 data); event DisableContract(); event ModifyCollateralBalance(bytes32 indexed collateralType, address indexed account, int256 wad); event TransferCollateral(bytes32 indexed collateralType, address indexed src, address indexed dst, uint256 wad); event TransferInternalCoins(address indexed src, address indexed dst, uint256 rad); event ModifySAFECollateralization( bytes32 indexed collateralType, address indexed safe, address collateralSource, address debtDestination, int256 deltaCollateral, int256 deltaDebt, uint256 lockedCollateral, uint256 generatedDebt, uint256 globalDebt ); event TransferSAFECollateralAndDebt( bytes32 indexed collateralType, address indexed src, address indexed dst, int256 deltaCollateral, int256 deltaDebt, uint256 srcLockedCollateral, uint256 srcGeneratedDebt, uint256 dstLockedCollateral, uint256 dstGeneratedDebt ); event ConfiscateSAFECollateralAndDebt( bytes32 indexed collateralType, address indexed safe, address collateralCounterparty, address debtCounterparty, int256 deltaCollateral, int256 deltaDebt, uint256 globalUnbackedDebt ); event SettleDebt(address indexed account, uint256 rad, uint256 debtBalance, uint256 coinBalance, uint256 globalUnbackedDebt, uint256 globalDebt); event CreateUnbackedDebt( address indexed debtDestination, address indexed coinDestination, uint256 rad, uint256 debtDstBalance, uint256 coinDstBalance, uint256 globalUnbackedDebt, uint256 globalDebt ); event UpdateAccumulatedRate( bytes32 indexed collateralType, address surplusDst, int256 rateMultiplier, uint256 dstCoinBalance, uint256 globalDebt ); // --- Init --- constructor() public { authorizedAccounts[msg.sender] = 1; safeDebtCeiling = uint256(-1); contractEnabled = 1; emit AddAuthorization(msg.sender); emit ModifyParameters("safeDebtCeiling", uint256(-1)); } // --- Math --- function addition(uint256 x, int256 y) internal pure returns (uint256 z) { z = x + uint256(y); require(y >= 0 || z <= x, "SAFEEngine/add-uint-int-overflow"); require(y <= 0 || z >= x, "SAFEEngine/add-uint-int-underflow"); } function addition(int256 x, int256 y) internal pure returns (int256 z) { z = x + y; require(y >= 0 || z <= x, "SAFEEngine/add-int-int-overflow"); require(y <= 0 || z >= x, "SAFEEngine/add-int-int-underflow"); } function subtract(uint256 x, int256 y) internal pure returns (uint256 z) { z = x - uint256(y); require(y <= 0 || z <= x, "SAFEEngine/sub-uint-int-overflow"); require(y >= 0 || z >= x, "SAFEEngine/sub-uint-int-underflow"); } function subtract(int256 x, int256 y) internal pure returns (int256 z) { z = x - y; require(y <= 0 || z <= x, "SAFEEngine/sub-int-int-overflow"); require(y >= 0 || z >= x, "SAFEEngine/sub-int-int-underflow"); } function multiply(uint256 x, int256 y) internal pure returns (int256 z) { z = int256(x) * y; require(int256(x) >= 0, "SAFEEngine/mul-uint-int-null-x"); require(y == 0 || z / y == int256(x), "SAFEEngine/mul-uint-int-overflow"); } function addition(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x + y) >= x, "SAFEEngine/add-uint-uint-overflow"); } function subtract(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x - y) <= x, "SAFEEngine/sub-uint-uint-underflow"); } function multiply(uint256 x, uint256 y) internal pure returns (uint256 z) { require(y == 0 || (z = x * y) / y == x, "SAFEEngine/multiply-uint-uint-overflow"); } // --- Administration --- /** * @notice Creates a brand new collateral type * @param collateralType Collateral type name (e.g ETH-A, TBTC-B) */ function initializeCollateralType(bytes32 collateralType) external isAuthorized { require(collateralTypes[collateralType].accumulatedRate == 0, "SAFEEngine/collateral-type-already-exists"); collateralTypes[collateralType].accumulatedRate = 10 ** 27; emit InitializeCollateralType(collateralType); } /** * @notice Modify general uint256 params * @param parameter The name of the parameter modified * @param data New value for the parameter */ function modifyParameters(bytes32 parameter, uint256 data) external isAuthorized { require(contractEnabled == 1, "SAFEEngine/contract-not-enabled"); if (parameter == "globalDebtCeiling") globalDebtCeiling = data; else if (parameter == "safeDebtCeiling") safeDebtCeiling = data; else revert("SAFEEngine/modify-unrecognized-param"); emit ModifyParameters(parameter, data); } /** * @notice Modify collateral specific params * @param collateralType Collateral type we modify params for * @param parameter The name of the parameter modified * @param data New value for the parameter */ function modifyParameters( bytes32 collateralType, bytes32 parameter, uint256 data ) external isAuthorized { require(contractEnabled == 1, "SAFEEngine/contract-not-enabled"); if (parameter == "safetyPrice") collateralTypes[collateralType].safetyPrice = data; else if (parameter == "liquidationPrice") collateralTypes[collateralType].liquidationPrice = data; else if (parameter == "debtCeiling") collateralTypes[collateralType].debtCeiling = data; else if (parameter == "debtFloor") collateralTypes[collateralType].debtFloor = data; else revert("SAFEEngine/modify-unrecognized-param"); emit ModifyParameters(collateralType, parameter, data); } /** * @notice Disable this contract (normally called by GlobalSettlement) */ function disableContract() external isAuthorized { contractEnabled = 0; emit DisableContract(); } // --- Fungibility --- /** * @notice Join/exit collateral into and and out of the system * @param collateralType Collateral type to join/exit * @param account Account that gets credited/debited * @param wad Amount of collateral */ function modifyCollateralBalance( bytes32 collateralType, address account, int256 wad ) external isAuthorized { tokenCollateral[collateralType][account] = addition(tokenCollateral[collateralType][account], wad); emit ModifyCollateralBalance(collateralType, account, wad); } /** * @notice Transfer collateral between accounts * @param collateralType Collateral type transferred * @param src Collateral source * @param dst Collateral destination * @param wad Amount of collateral transferred */ function transferCollateral( bytes32 collateralType, address src, address dst, uint256 wad ) external { require(canModifySAFE(src, msg.sender), "SAFEEngine/not-allowed"); tokenCollateral[collateralType][src] = subtract(tokenCollateral[collateralType][src], wad); tokenCollateral[collateralType][dst] = addition(tokenCollateral[collateralType][dst], wad); emit TransferCollateral(collateralType, src, dst, wad); } /** * @notice Transfer internal coins (does not affect external balances from Coin.sol) * @param src Coins source * @param dst Coins destination * @param rad Amount of coins transferred */ function transferInternalCoins(address src, address dst, uint256 rad) external { require(canModifySAFE(src, msg.sender), "SAFEEngine/not-allowed"); coinBalance[src] = subtract(coinBalance[src], rad); coinBalance[dst] = addition(coinBalance[dst], rad); emit TransferInternalCoins(src, dst, rad); } function either(bool x, bool y) internal pure returns (bool z) { assembly{ z := or(x, y)} } function both(bool x, bool y) internal pure returns (bool z) { assembly{ z := and(x, y)} } // --- SAFE Manipulation --- /** * @notice Add/remove collateral or put back/generate more debt in a SAFE * @param collateralType Type of collateral to withdraw/deposit in and from the SAFE * @param safe Target SAFE * @param collateralSource Account we take collateral from/put collateral into * @param debtDestination Account from which we credit/debit coins and debt * @param deltaCollateral Amount of collateral added/extract from the SAFE (wad) * @param deltaDebt Amount of debt to generate/repay (wad) */ function modifySAFECollateralization( bytes32 collateralType, address safe, address collateralSource, address debtDestination, int256 deltaCollateral, int256 deltaDebt ) external { // system is live require(contractEnabled == 1, "SAFEEngine/contract-not-enabled"); SAFE memory safeData = safes[collateralType][safe]; CollateralType memory collateralTypeData = collateralTypes[collateralType]; // collateral type has been initialised require(collateralTypeData.accumulatedRate != 0, "SAFEEngine/collateral-type-not-initialized"); safeData.lockedCollateral = addition(safeData.lockedCollateral, deltaCollateral); safeData.generatedDebt = addition(safeData.generatedDebt, deltaDebt); collateralTypeData.debtAmount = addition(collateralTypeData.debtAmount, deltaDebt); int256 deltaAdjustedDebt = multiply(collateralTypeData.accumulatedRate, deltaDebt); uint256 totalDebtIssued = multiply(collateralTypeData.accumulatedRate, safeData.generatedDebt); globalDebt = addition(globalDebt, deltaAdjustedDebt); // either debt has decreased, or debt ceilings are not exceeded require( either( deltaDebt <= 0, both(multiply(collateralTypeData.debtAmount, collateralTypeData.accumulatedRate) <= collateralTypeData.debtCeiling, globalDebt <= globalDebtCeiling) ), "SAFEEngine/ceiling-exceeded" ); // safe is either less risky than before, or it is safe require( either( both(deltaDebt <= 0, deltaCollateral >= 0), totalDebtIssued <= multiply(safeData.lockedCollateral, collateralTypeData.safetyPrice) ), "SAFEEngine/not-safe" ); // safe is either more safe, or the owner consents require(either(both(deltaDebt <= 0, deltaCollateral >= 0), canModifySAFE(safe, msg.sender)), "SAFEEngine/not-allowed-to-modify-safe"); // collateral src consents require(either(deltaCollateral <= 0, canModifySAFE(collateralSource, msg.sender)), "SAFEEngine/not-allowed-collateral-src"); // debt dst consents require(either(deltaDebt >= 0, canModifySAFE(debtDestination, msg.sender)), "SAFEEngine/not-allowed-debt-dst"); // safe has no debt, or a non-dusty amount require(either(safeData.generatedDebt == 0, totalDebtIssued >= collateralTypeData.debtFloor), "SAFEEngine/dust"); // safe didn't go above the safe debt limit if (deltaDebt > 0) { require(safeData.generatedDebt <= safeDebtCeiling, "SAFEEngine/above-debt-limit"); } tokenCollateral[collateralType][collateralSource] = subtract(tokenCollateral[collateralType][collateralSource], deltaCollateral); coinBalance[debtDestination] = addition(coinBalance[debtDestination], deltaAdjustedDebt); safes[collateralType][safe] = safeData; collateralTypes[collateralType] = collateralTypeData; emit ModifySAFECollateralization( collateralType, safe, collateralSource, debtDestination, deltaCollateral, deltaDebt, safeData.lockedCollateral, safeData.generatedDebt, globalDebt ); } // --- SAFE Fungibility --- /** * @notice Transfer collateral and/or debt between SAFEs * @param collateralType Collateral type transferred between SAFEs * @param src Source SAFE * @param dst Destination SAFE * @param deltaCollateral Amount of collateral to take/add into src and give/take from dst (wad) * @param deltaDebt Amount of debt to take/add into src and give/take from dst (wad) */ function transferSAFECollateralAndDebt( bytes32 collateralType, address src, address dst, int256 deltaCollateral, int256 deltaDebt ) external { SAFE storage srcSAFE = safes[collateralType][src]; SAFE storage dstSAFE = safes[collateralType][dst]; CollateralType storage collateralType_ = collateralTypes[collateralType]; srcSAFE.lockedCollateral = subtract(srcSAFE.lockedCollateral, deltaCollateral); srcSAFE.generatedDebt = subtract(srcSAFE.generatedDebt, deltaDebt); dstSAFE.lockedCollateral = addition(dstSAFE.lockedCollateral, deltaCollateral); dstSAFE.generatedDebt = addition(dstSAFE.generatedDebt, deltaDebt); uint256 srcTotalDebtIssued = multiply(srcSAFE.generatedDebt, collateralType_.accumulatedRate); uint256 dstTotalDebtIssued = multiply(dstSAFE.generatedDebt, collateralType_.accumulatedRate); // both sides consent require(both(canModifySAFE(src, msg.sender), canModifySAFE(dst, msg.sender)), "SAFEEngine/not-allowed"); // both sides safe require(srcTotalDebtIssued <= multiply(srcSAFE.lockedCollateral, collateralType_.safetyPrice), "SAFEEngine/not-safe-src"); require(dstTotalDebtIssued <= multiply(dstSAFE.lockedCollateral, collateralType_.safetyPrice), "SAFEEngine/not-safe-dst"); // both sides non-dusty require(either(srcTotalDebtIssued >= collateralType_.debtFloor, srcSAFE.generatedDebt == 0), "SAFEEngine/dust-src"); require(either(dstTotalDebtIssued >= collateralType_.debtFloor, dstSAFE.generatedDebt == 0), "SAFEEngine/dust-dst"); emit TransferSAFECollateralAndDebt( collateralType, src, dst, deltaCollateral, deltaDebt, srcSAFE.lockedCollateral, srcSAFE.generatedDebt, dstSAFE.lockedCollateral, dstSAFE.generatedDebt ); } // --- SAFE Confiscation --- /** * @notice Normally used by the LiquidationEngine in order to confiscate collateral and debt from a SAFE and give them to someone else * @param collateralType Collateral type the SAFE has locked inside * @param safe Target SAFE * @param collateralCounterparty Who we take/give collateral to * @param debtCounterparty Who we take/give debt to * @param deltaCollateral Amount of collateral taken/added into the SAFE (wad) * @param deltaDebt Amount of debt taken/added into the SAFE (wad) */ function confiscateSAFECollateralAndDebt( bytes32 collateralType, address safe, address collateralCounterparty, address debtCounterparty, int256 deltaCollateral, int256 deltaDebt ) external isAuthorized { SAFE storage safe_ = safes[collateralType][safe]; CollateralType storage collateralType_ = collateralTypes[collateralType]; safe_.lockedCollateral = addition(safe_.lockedCollateral, deltaCollateral); safe_.generatedDebt = addition(safe_.generatedDebt, deltaDebt); collateralType_.debtAmount = addition(collateralType_.debtAmount, deltaDebt); int256 deltaTotalIssuedDebt = multiply(collateralType_.accumulatedRate, deltaDebt); tokenCollateral[collateralType][collateralCounterparty] = subtract( tokenCollateral[collateralType][collateralCounterparty], deltaCollateral ); debtBalance[debtCounterparty] = subtract( debtBalance[debtCounterparty], deltaTotalIssuedDebt ); globalUnbackedDebt = subtract( globalUnbackedDebt, deltaTotalIssuedDebt ); emit ConfiscateSAFECollateralAndDebt( collateralType, safe, collateralCounterparty, debtCounterparty, deltaCollateral, deltaDebt, globalUnbackedDebt ); } // --- Settlement --- /** * @notice Nullify an amount of coins with an equal amount of debt * @param rad Amount of debt & coins to destroy */ function settleDebt(uint256 rad) external { address account = msg.sender; debtBalance[account] = subtract(debtBalance[account], rad); coinBalance[account] = subtract(coinBalance[account], rad); globalUnbackedDebt = subtract(globalUnbackedDebt, rad); globalDebt = subtract(globalDebt, rad); emit SettleDebt(account, rad, debtBalance[account], coinBalance[account], globalUnbackedDebt, globalDebt); } /** * @notice Usually called by CoinSavingsAccount in order to create unbacked debt * @param debtDestination Usually AccountingEngine that can settle uncovered debt with surplus * @param coinDestination Usually CoinSavingsAccount that passes the new coins to depositors * @param rad Amount of debt to create */ function createUnbackedDebt( address debtDestination, address coinDestination, uint256 rad ) external isAuthorized { debtBalance[debtDestination] = addition(debtBalance[debtDestination], rad); coinBalance[coinDestination] = addition(coinBalance[coinDestination], rad); globalUnbackedDebt = addition(globalUnbackedDebt, rad); globalDebt = addition(globalDebt, rad); emit CreateUnbackedDebt( debtDestination, coinDestination, rad, debtBalance[debtDestination], coinBalance[coinDestination], globalUnbackedDebt, globalDebt ); } // --- Rates --- /** * @notice Usually called by TaxCollector in order to accrue interest on a specific collateral type * @param collateralType Collateral type we accrue interest for * @param surplusDst Destination for the newly created surplus * @param rateMultiplier Multiplier applied to the debtAmount in order to calculate the surplus [ray] */ function updateAccumulatedRate( bytes32 collateralType, address surplusDst, int256 rateMultiplier ) external isAuthorized { require(contractEnabled == 1, "SAFEEngine/contract-not-enabled"); CollateralType storage collateralType_ = collateralTypes[collateralType]; collateralType_.accumulatedRate = addition(collateralType_.accumulatedRate, rateMultiplier); int256 deltaSurplus = multiply(collateralType_.debtAmount, rateMultiplier); coinBalance[surplusDst] = addition(coinBalance[surplusDst], deltaSurplus); globalDebt = addition(globalDebt, deltaSurplus); emit UpdateAccumulatedRate( collateralType, surplusDst, rateMultiplier, coinBalance[surplusDst], globalDebt ); } }
True
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/** *Submitted for verification at Etherscan.io on 2022-04-21 */ // SPDX-License-Identifier: MIT // File: @openzeppelin/contracts/utils/Context.sol // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } } // File: @openzeppelin/contracts/access/Ownable.sol // OpenZeppelin Contracts v4.4.1 (access/Ownable.sol) pragma solidity ^0.8.0; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(owner() == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } } // File: @openzeppelin/contracts/token/ERC20/IERC20.sol // OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 amount ) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } // File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.0; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20Metadata is IERC20 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); } // File: @openzeppelin/contracts/token/ERC20/ERC20.sol // OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/ERC20.sol) pragma solidity ^0.8.0; /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin Contracts guidelines: functions revert * instead returning `false` on failure. This behavior is nonetheless * conventional and does not conflict with the expectations of ERC20 * applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20 is Context, IERC20, IERC20Metadata { mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * The default value of {decimals} is 18. To select a different value for * {decimals} you should overload it. * * All two of these values are immutable: they can only be set once during * construction. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5.05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless this function is * overridden; * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual override returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `to` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address to, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _transfer(owner, to, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on * `transferFrom`. This is semantically equivalent to an infinite approval. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _approve(owner, spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * NOTE: Does not update the allowance if the current allowance * is the maximum `uint256`. * * Requirements: * * - `from` and `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. * - the caller must have allowance for ``from``'s tokens of at least * `amount`. */ function transferFrom( address from, address to, uint256 amount ) public virtual override returns (bool) { address spender = _msgSender(); _spendAllowance(from, spender, amount); _transfer(from, to, amount); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { address owner = _msgSender(); _approve(owner, spender, _allowances[owner][spender] + addedValue); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { address owner = _msgSender(); uint256 currentAllowance = _allowances[owner][spender]; require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); unchecked { _approve(owner, spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `amount` of tokens from `sender` to `recipient`. * * This internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. */ function _transfer( address from, address to, uint256 amount ) internal virtual { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(from, to, amount); uint256 fromBalance = _balances[from]; require(fromBalance >= amount, "ERC20: transfer amount exceeds balance"); unchecked { _balances[from] = fromBalance - amount; } _balances[to] += amount; emit Transfer(from, to, amount); _afterTokenTransfer(from, to, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply += amount; _balances[account] += amount; emit Transfer(address(0), account, amount); _afterTokenTransfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); uint256 accountBalance = _balances[account]; require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); unchecked { _balances[account] = accountBalance - amount; } _totalSupply -= amount; emit Transfer(account, address(0), amount); _afterTokenTransfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve( address owner, address spender, uint256 amount ) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Spend `amount` form the allowance of `owner` toward `spender`. * * Does not update the allowance amount in case of infinite allowance. * Revert if not enough allowance is available. * * Might emit an {Approval} event. */ function _spendAllowance( address owner, address spender, uint256 amount ) internal virtual { uint256 currentAllowance = allowance(owner, spender); if (currentAllowance != type(uint256).max) { require(currentAllowance >= amount, "ERC20: insufficient allowance"); unchecked { _approve(owner, spender, currentAllowance - amount); } } } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * has been transferred to `to`. * - when `from` is zero, `amount` tokens have been minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens have been burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 amount ) internal virtual {} } // File: alloyx-smart-contracts-v2/contracts/alloyx/AlloyxTokenCRWN.sol pragma solidity ^0.8.2; contract AlloyxTokenCRWN is ERC20, Ownable { constructor() ERC20("Crown Gold", "CRWN") {} function mint(address _account, uint256 _amount) external onlyOwner returns (bool) { _mint(_account, _amount); return true; } function burn(address _account, uint256 _amount) external onlyOwner returns (bool) { _burn(_account, _amount); return true; } function contractName() external pure returns (string memory) { return "AlloyxTokenCRWN"; } }
True
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/** *Submitted for verification at Etherscan.io on 2021-05-25 */ // SPDX-License-Identifier: MIT pragma solidity ^0.7.4; /* * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with GSN meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when an * operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) { uint256 c = a + b; if (c < a) return (false, 0); return (true, c); } /** * @dev Returns the substraction of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) { if (b > a) return (false, 0); return (true, a - b); } /** * @dev Returns the multiplication of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) return (true, 0); uint256 c = a * b; if (c / a != b) return (false, 0); return (true, c); } /** * @dev Returns the division of two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) { if (b == 0) return (false, 0); return (true, a / b); } /** * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) { if (b == 0) return (false, 0); return (true, a % b); } /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { require(b <= a, "SafeMath: subtraction overflow"); return a - b; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) return 0; uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers, reverting on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { require(b > 0, "SafeMath: division by zero"); return a / b; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { require(b > 0, "SafeMath: modulo by zero"); return a % b; } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {trySub}. * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); return a - b; } /** * @dev Returns the integer division of two unsigned integers, reverting with custom message on * division by zero. The result is rounded towards zero. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryDiv}. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); return a / b; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting with custom message when dividing by zero. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryMod}. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); return a % b; } } /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin guidelines: functions revert instead * of returning `false` on failure. This behavior is nonetheless conventional * and does not conflict with the expectations of ERC20 applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20 is Context, IERC20 { using SafeMath for uint256; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; uint8 private _decimals; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ constructor (string memory name_, string memory symbol_) public { _name = name_; _symbol = symbol_; _decimals = 18; } /** * @dev Returns the name of the token. */ function name() public view virtual returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is * called. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * Requirements: * * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Sets {decimals} to a value other than the default one of 18. * * WARNING: This function should only be called from the constructor. Most * applications that interact with token contracts will not expect * {decimals} to ever change, and may work incorrectly if it does. */ function _setupDecimals(uint8 decimals_) internal virtual { _decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } } /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor () internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(owner() == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } /* Token recipient. Modified very slightly from the example on http://ethereum.org/dao (just to index log parameters). */ /** * @title TokenRecipient * @author Project Erax Developers */ contract TokenRecipient { event ReceivedEther(address indexed sender, uint amount); event ReceivedTokens(address indexed from, uint256 value, address indexed token, bytes extraData); /** * @dev Receive tokens and generate a log event * @param from Address from which to transfer tokens * @param value Amount of tokens to transfer * @param token Address of token * @param extraData Additional data to log */ function receiveApproval(address from, uint256 value, address token, bytes memory extraData) public { ERC20 t = ERC20(token); require(t.transferFrom(from, address(this), value),"4"); emit ReceivedTokens(from, value, token, extraData); } /** * @dev Receive Ether and generate a log event */ receive() payable external { emit ReceivedEther(msg.sender, msg.value); } } /** * @title Proxy * @dev Gives the possibility to delegate any call to a foreign implementation. */ abstract contract Proxy { /** * @dev Tells the address of the implementation where every call will be delegated. * @return address of the implementation to which it will be delegated */ function implementation() public virtual view returns (address); /** * @dev Tells the type of proxy (EIP 897) * @return proxyTypeId Type of proxy, 2 for upgradeable proxy */ function proxyType() public virtual pure returns (uint256 proxyTypeId); /** * @dev Fallback function allowing to perform a delegatecall to the given implementation. * This function will return whatever the implementation call returns */ fallback () payable external { address _impl = implementation(); require(_impl != address(0),"40"); assembly { let ptr := mload(0x40) calldatacopy(ptr, 0, calldatasize()) let result := delegatecall(gas(), _impl, ptr, calldatasize(), 0, 0) let size := returndatasize() returndatacopy(ptr, 0, size) switch result case 0 { revert(ptr, size) } default { return(ptr, size) } } } } /** * @title OwnedUpgradeabilityStorage * @dev This contract keeps track of the upgradeability owner */ contract OwnedUpgradeabilityStorage is Proxy{ // Current implementation address internal _implementation; // Owner of the contract address private _upgradeabilityOwner; /** * @dev Tells the address of the owner * @return the address of the owner */ function upgradeabilityOwner() public view returns (address) { return _upgradeabilityOwner; } /** * @dev Sets the address of the owner */ function setUpgradeabilityOwner(address newUpgradeabilityOwner) internal { _upgradeabilityOwner = newUpgradeabilityOwner; } /** * @dev Tells the address of the current implementation * @return address of the current implementation */ function implementation() public override view returns (address) { return _implementation; } /** * @dev Tells the proxy type (EIP 897) * @return proxyTypeId Proxy type, 2 for forwarding proxy */ function proxyType() public override pure returns (uint256 proxyTypeId) { return 2; } } /* Proxy contract to hold access to assets on behalf of a user (e.g. ERC20 approve) and execute calls under particular conditions. */ /** * @title AuthenticatedProxy * @author Project Erax Developers */ contract AuthenticatedProxy is TokenRecipient, OwnedUpgradeabilityStorage { /* Whether initialized. */ bool initialized = false; /* Address which owns this proxy. */ address public user; /* Associated registry with contract authentication information. */ ProxyRegistry public registry; /* Whether access has been revoked. */ bool public revoked; /* Delegate call could be used to atomically transfer multiple assets owned by the proxy contract with one order. */ enum HowToCall { Call, DelegateCall } /* Event fired when the proxy access is revoked or unrevoked. */ event Revoked(bool revoked); /** * Initialize an AuthenticatedProxy * * @param addrUser Address of user on whose behalf this proxy will act * @param addrRegistry Address of ProxyRegistry contract which will manage this proxy */ function initialize (address addrUser, ProxyRegistry addrRegistry) public { require(!initialized,"26"); initialized = true; user = addrUser; registry = addrRegistry; } /** * Set the revoked flag (allows a user to revoke ProxyRegistry access) * * @dev Can be called by the user only * @param revoke Whether or not to revoke access */ function setRevoke(bool revoke) public { require(msg.sender == user,"27"); revoked = revoke; emit Revoked(revoke); } /** * Execute a message call from the proxy contract * * @dev Can be called by the user, or by a contract authorized by the registry as long as the user has not revoked access * @param dest Address to which the call will be sent * @param howToCall Which kind of call to make * @param callData Calldata to send * @return result Result of the call (success or failure) */ function proxy(address dest, HowToCall howToCall, bytes memory callData) public returns (bool result) { require(msg.sender == user || (!revoked && registry.contracts(msg.sender)),"28"); if (howToCall == HowToCall.Call) { (result, ) = dest.call(callData); } else if (howToCall == HowToCall.DelegateCall) { (result, ) = dest.delegatecall(callData); } return result; } /** * Execute a message call and assert success * * @dev Same functionality as `proxy`, just asserts the return value * @param dest Address to which the call will be sent * @param howToCall What kind of call to make * @param callData Calldata to send */ function proxyAssert(address dest, HowToCall howToCall, bytes memory callData) public { require(proxy(dest, howToCall, callData),"29"); } } /** * @title OwnedUpgradeabilityProxy * @dev This contract combines an upgradeability proxy with basic authorization control functionalities */ contract OwnedUpgradeabilityProxy is OwnedUpgradeabilityStorage { /** * @dev Event to show ownership has been transferred * @param previousOwner representing the address of the previous owner * @param newOwner representing the address of the new owner */ event ProxyOwnershipTransferred(address previousOwner, address newOwner); /** * @dev This event will be emitted every time the implementation gets upgraded * @param implementation representing the address of the upgraded implementation */ event Upgraded(address indexed implementation); /** * @dev Upgrades the implementation address * @param implementation representing the address of the new implementation to be set */ function _upgradeTo(address implementation) internal { require(_implementation != implementation,"36"); _implementation = implementation; emit Upgraded(implementation); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyProxyOwner() { require(msg.sender == proxyOwner(),"37"); _; } /** * @dev Tells the address of the proxy owner * @return the address of the proxy owner */ function proxyOwner() public view returns (address) { return upgradeabilityOwner(); } /** * @dev Allows the current owner to transfer control of the contract to a newOwner. * @param newOwner The address to transfer ownership to. */ function transferProxyOwnership(address newOwner) public onlyProxyOwner { require(newOwner != address(0),"38"); emit ProxyOwnershipTransferred(proxyOwner(), newOwner); setUpgradeabilityOwner(newOwner); } /** * @dev Allows the upgradeability owner to upgrade the current implementation of the proxy. * @param implementation representing the address of the new implementation to be set. */ function upgradeTo(address implementation) public onlyProxyOwner { _upgradeTo(implementation); } /** * @dev Allows the upgradeability owner to upgrade the current implementation of the proxy * and delegatecall the new implementation for initialization. * @param implementation representing the address of the new implementation to be set. * @param data represents the msg.data to bet sent in the low level call. This parameter may include the function * signature of the implementation to be called with the needed payload */ function upgradeToAndCall(address implementation, bytes memory data) payable public onlyProxyOwner { upgradeTo(implementation); (bool result, ) = address(this).delegatecall(data); require(result,"39"); } } /* EraxOwnableDelegateProxy */ contract OwnableDelegateProxy is OwnedUpgradeabilityProxy { constructor(address owner, address initialImplementation, bytes memory callData) { setUpgradeabilityOwner(owner); _upgradeTo(initialImplementation); (bool result, ) = initialImplementation.delegatecall(callData); require(result,"30"); } } /* Proxy registry; keeps a mapping of AuthenticatedProxy contracts and mapping of contracts authorized to access them. Abstracted away from the Exchange (a) to reduce Exchange attack surface and (b) so that the Exchange contract can be upgraded without users needing to transfer assets to new proxies. */ contract ProxyRegistry is Ownable { /* DelegateProxy implementation contract. Must be initialized. */ address public delegateProxyImplementation; /* Authenticated proxies by user. */ mapping(address => OwnableDelegateProxy) public proxies; /* Contracts pending access. */ mapping(address => uint) public pending; /* Contracts allowed to call those proxies. */ mapping(address => bool) public contracts; /* Delay period for adding an authenticated contract. This mitigates a particular class of potential attack on the Erax DAO (which owns this registry) - if at any point the value of assets held by proxy contracts exceeded the value of half the WYV supply (votes in the DAO), a malicious but rational attacker could buy half the Erax and grant themselves access to all the proxy contracts. A delay period renders this attack nonthreatening - given two weeks, if that happened, users would have plenty of time to notice and transfer their assets. */ uint public DELAY_PERIOD = 2 weeks; /** * Start the process to enable access for specified contract. Subject to delay period. * * @dev ProxyRegistry owner only * @param addr Address to which to grant permissions */ function startGrantAuthentication (address addr) public onlyOwner { require(!contracts[addr] && pending[addr] == 0,"31"); pending[addr] = block.timestamp; } /** * End the process to nable access for specified contract after delay period has passed. * * @dev ProxyRegistry owner only * @param addr Address to which to grant permissions */ function endGrantAuthentication (address addr) public onlyOwner { require(!contracts[addr] && pending[addr] != 0 && ((pending[addr] + DELAY_PERIOD) < block.timestamp),"32"); pending[addr] = 0; contracts[addr] = true; } /** Joe add **/ function grantAuthentication (address addr) public onlyOwner { require(!contracts[addr],"33"); contracts[addr] = true; } /** * Revoke access for specified contract. Can be done instantly. * * @dev ProxyRegistry owner only * @param addr Address of which to revoke permissions */ function revokeAuthentication (address addr) public onlyOwner { contracts[addr] = false; } /** * Register a proxy contract with this registry * * @dev Must be called by the user which the proxy is for, creates a new AuthenticatedProxy * @return proxy New AuthenticatedProxy contract */ function registerProxy() public returns (OwnableDelegateProxy proxy) { require(address(proxies[msg.sender]) == address(0),"34"); proxy = new OwnableDelegateProxy(msg.sender, delegateProxyImplementation, abi.encodeWithSignature("initialize(address,address)", msg.sender, address(this))); proxies[msg.sender] = proxy; return proxy; } } /* Token transfer proxy. Uses the authentication table of a ProxyRegistry contract to grant ERC20 `transferFrom` access. This means that users only need to authorize the proxy contract once for all future protocol versions. */ contract TokenTransferProxy { /* Authentication registry. */ ProxyRegistry public registry; /** * Call ERC20 `transferFrom` * * @dev Authenticated contract only * @param token ERC20 token address * @param from From address * @param to To address * @param amount Transfer amount */ function transferFrom(address token, address from, address to, uint amount) public returns (bool) { require(registry.contracts(msg.sender),"35"); return ERC20(token).transferFrom(from, to, amount); } } /* << Project Erax Token Transfer Proxy >. */ contract EraxTokenTransferProxy is TokenTransferProxy { constructor (ProxyRegistry registryAddr) public { registry = registryAddr; } }
True
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/** *Submitted for verification at Etherscan.io on 2021-12-23 */ //* t.me/BBJesusToken // SPDX-License-Identifier: MIT pragma solidity ^0.8.4; abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } } interface IERC20 { function totalSupply() external view returns (uint256); function balanceOf(address account) external view returns (uint256); function transfer(address recipient, uint256 amount) external returns (bool); function allowance(address owner, address spender) external view returns (uint256); function approve(address spender, uint256 amount) external returns (bool); function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); event Approval(address indexed owner, address indexed spender, uint256 value); } library SafeMath { function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; return c; } } contract Ownable is Context { address private _owner; address private _previousOwner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); constructor() { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } function owner() public view returns (address) { return _owner; } modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } } interface IUniswapV2Pair { event Approval(address indexed owner, address indexed spender, uint value); event Transfer(address indexed from, address indexed to, uint value); function name() external pure returns (string memory); function symbol() external pure returns (string memory); function decimals() external pure returns (uint8); function totalSupply() external view returns (uint); function balanceOf(address owner) external view returns (uint); function allowance(address owner, address spender) external view returns (uint); function approve(address spender, uint value) external returns (bool); function transfer(address to, uint value) external returns (bool); function transferFrom(address from, address to, uint value) external returns (bool); function DOMAIN_SEPARATOR() external view returns (bytes32); function PERMIT_TYPEHASH() external pure returns (bytes32); function nonces(address owner) external view returns (uint); function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external; event Mint(address indexed sender, uint amount0, uint amount1); event Burn(address indexed sender, uint amount0, uint amount1, address indexed to); event Swap( address indexed sender, uint amount0In, uint amount1In, uint amount0Out, uint amount1Out, address indexed to ); event Sync(uint112 reserve0, uint112 reserve1); function MINIMUM_LIQUIDITY() external pure returns (uint); function factory() external view returns (address); function token0() external view returns (address); function token1() external view returns (address); function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast); function price0CumulativeLast() external view returns (uint); function price1CumulativeLast() external view returns (uint); function kLast() external view returns (uint); function mint(address to) external returns (uint liquidity); function burn(address to) external returns (uint amount0, uint amount1); function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external; function skim(address to) external; function sync() external; function initialize(address, address) external; } interface IUniswapV2Factory { function createPair(address tokenA, address tokenB) external returns (address pair); } interface IUniswapV2Router02 { function swapExactTokensForETHSupportingFeeOnTransferTokens( uint256 amountIn, uint256 amountOutMin, address[] calldata path, address to, uint256 deadline ) external; function swapExactTokensForTokensSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external; function factory() external pure returns (address); function WETH() external pure returns (address); function addLiquidityETH( address token, uint256 amountTokenDesired, uint256 amountTokenMin, uint256 amountETHMin, address to, uint256 deadline ) external payable returns (uint256 amountToken, uint256 amountETH, uint256 liquidity); function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB); function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut); function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn); function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts); function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts); } abstract contract IERC20Extented is IERC20 { function decimals() external view virtual returns (uint8); function name() external view virtual returns (string memory); function symbol() external view virtual returns (string memory); } contract BabyJesus is Context, IERC20, IERC20Extented, Ownable { using SafeMath for uint256; string private constant _name = "Baby Jesus"; string private constant _symbol = "BBJS"; uint8 private constant _decimals = 9; mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; mapping(address => bool) private _isExcludedFromFee; uint256 private constant _tTotal = 100 * 1e9 * 1e9; // 100,000,000,000 uint256 private _firstBlock; uint256 private _notpogBlocks; uint256 public _maxWalletAmount; uint256 private _liquidityFee = 20; // divided by 1000 uint256 private _previousLiquidityFee = _liquidityFee; uint256 private _marketingFee = 80; // divided by 1000 uint256 private _previousMarketingFee = _marketingFee; uint256 private _marketingPercent = 1000; struct FeeBreakdown { uint256 tLiquidity; uint256 tMarketing; uint256 tAmount; } mapping(address => bool) private notpogs; address payable private _marketingAddress = payable(0x54C1CfDCE6E128382090a22619136c0398284f04); address payable private _dev = payable(0x2ec954DbE873CbC70dF156E8B4E743Db764a368C); IUniswapV2Router02 private uniswapV2Router; address public uniswapV2Pair; uint256 private _maxTxAmount; bool private tradingOpen = false; bool private inSwap = false; bool private trdg = true; bool private um = true; bool private pairSwapped = false; event EndedTrdg(bool trdg); event MaxTxAmountUpdated(uint256 _maxTxAmount); event FeesUpdated(uint256 _marketingFee, uint256 _liquidityFee); modifier lockTheSwap { inSwap = true; _; inSwap = false; } constructor() { IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); uniswapV2Router = _uniswapV2Router; _approve(address(this), address(uniswapV2Router), _tTotal); uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH()); IERC20(uniswapV2Pair).approve(address(uniswapV2Router),type(uint256).max); _maxTxAmount = _tTotal; // start off transaction limit at 100% of total supply _maxWalletAmount = _tTotal.div(1); // 100% _balances[_msgSender()] = _tTotal; _isExcludedFromFee[owner()] = true; _isExcludedFromFee[address(this)] = true; emit Transfer(address(0), _msgSender(), _tTotal); } function name() override external pure returns (string memory) { return _name; } function symbol() override external pure returns (string memory) { return _symbol; } function decimals() override external pure returns (uint8) { return _decimals; } function totalSupply() external pure override returns (uint256) { return _tTotal; } function balanceOf(address account) public view override returns (uint256) { return _balances[account]; } function transfer(address recipient, uint256 amount) external override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } function allowance(address owner, address spender) external view override returns (uint256) { return _allowances[owner][spender]; } function approve(address spender, uint256 amount) external override returns (bool) { _approve(_msgSender(), spender, amount); return true; } function transferFrom(address sender, address recipient, uint256 amount) external override returns (bool) { _transfer(sender, recipient, amount); _approve(sender,_msgSender(),_allowances[sender][_msgSender()].sub(amount,"ERC20: transfer amount exceeds allowance")); return true; } function removeAllFee() private { if (_marketingFee == 0 && _liquidityFee == 0) return; _previousMarketingFee = _marketingFee; _previousLiquidityFee = _liquidityFee; _marketingFee = 0; _liquidityFee = 0; } function setNotpogFee() private { _previousMarketingFee = _marketingFee; _previousLiquidityFee = _liquidityFee; _marketingFee = 900; _liquidityFee = 0; } function restoreAllFee() private { _marketingFee = _previousMarketingFee; _liquidityFee = _previousLiquidityFee; } function _approve(address owner, address spender, uint256 amount) private { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } function _transfer(address from, address to, uint256 amount) private { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); require(amount > 0, "Transfer amount must be greater than zero"); bool takeFee = true; if (from != owner() && to != owner() && from != address(this) && to != address(this)) { require(tradingOpen); require(amount <= _maxTxAmount); if (from == uniswapV2Pair && to != address(uniswapV2Router)) {//buys if (block.number <= _firstBlock.add(_notpogBlocks)) { notpogs[to] = true; } require(balanceOf(to).add(amount) <= _maxWalletAmount, "wallet balance after transfer must be less than max wallet amount"); if (notpogs[to]) { setNotpogFee(); takeFee = true; } } if (!inSwap && from != uniswapV2Pair) { //sells, transfers uint256 contractTokenBalance = balanceOf(address(this)); if (contractTokenBalance > 100000000 * 1e9) { swapAndLiquify(contractTokenBalance); } uint256 contractETHBalance = address(this).balance; if (contractETHBalance > 0) { sendETHToFee(address(this).balance); } } } if (_isExcludedFromFee[from] || _isExcludedFromFee[to]) { takeFee = false; } _tokenTransfer(from, to, amount, takeFee); restoreAllFee(); } function swapTokensForEth(uint256 tokenAmount) private lockTheSwap { address[] memory path = new address[](2); path[0] = address(this); path[1] = uniswapV2Router.WETH(); _approve(address(this), address(uniswapV2Router), tokenAmount); uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount, 0, path, address(this), block.timestamp); } function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private { _approve(address(this), address(uniswapV2Router), tokenAmount); // add the liquidity uniswapV2Router.addLiquidityETH{value: ethAmount}( address(this), tokenAmount, 0, // slippage is unavoidable 0, // slippage is unavoidable owner(), block.timestamp ); } function swapAndLiquify(uint256 contractTokenBalance) private lockTheSwap { uint256 autoLPamount = _liquidityFee.mul(contractTokenBalance).div(_marketingFee.add(_liquidityFee)); // split the contract balance into halves uint256 half = autoLPamount.div(2); uint256 otherHalf = contractTokenBalance.sub(half); // capture the contract's current ETH balance. // this is so that we can capture exactly the amount of ETH that the // swap creates, and not make the liquidity event include any ETH that // has been manually sent to the contract uint256 initialBalance = address(this).balance; // swap tokens for ETH swapTokensForEth(otherHalf); // <- this breaks the ETH -> HATE swap when swap+liquify is triggered // how much ETH did we just swap into? uint256 newBalance = ((address(this).balance.sub(initialBalance)).mul(half)).div(otherHalf); addLiquidity(half, newBalance); } function sendETHToFee(uint256 amount) private { _marketingAddress.transfer((amount).div(5).mul(4)); _dev.transfer((amount).div(5).mul(1)); } function openTrading(uint256 notpogBlocks) private { _firstBlock = block.number; _notpogBlocks = notpogBlocks; tradingOpen = true; } function manualSwap() external onlyOwner() { uint256 contractBalance = balanceOf(address(this)); if (contractBalance > 0) { swapTokensForEth(contractBalance); } } function manualSend() external onlyOwner() { uint256 contractETHBalance = address(this).balance; if (contractETHBalance > 0) { sendETHToFee(contractETHBalance); } } function _tokenTransfer(address sender, address recipient, uint256 amount, bool takeFee) private { if (!takeFee) { removeAllFee(); } _transferStandard(sender, recipient, amount); restoreAllFee(); } function _transferStandard(address sender, address recipient, uint256 amount) private { FeeBreakdown memory fees; fees.tMarketing = amount.mul(_marketingFee).div(1000); fees.tLiquidity = amount.mul(_liquidityFee).div(1000); fees.tAmount = amount.sub(fees.tMarketing).sub(fees.tLiquidity); _balances[sender] = _balances[sender].sub(amount); _balances[recipient] = _balances[recipient].add(fees.tAmount); _balances[address(this)] = _balances[address(this)].add(fees.tMarketing.add(fees.tLiquidity)); emit Transfer(sender, recipient, fees.tAmount); } receive() external payable {} function setMaxTxAmount(uint256 maxTxAmount) external onlyOwner() { require(maxTxAmount > _tTotal.div(10000), "Amount must be greater than 0.01% of supply"); require(maxTxAmount <= _tTotal, "Amount must be less than or equal to totalSupply"); _maxTxAmount = maxTxAmount; emit MaxTxAmountUpdated(_maxTxAmount); } function setMaxWalletAmount(uint256 maxWalletAmount) external onlyOwner() { require(maxWalletAmount > _tTotal.div(200), "Amount must be greater than 0.5% of supply"); require(maxWalletAmount <= _tTotal, "Amount must be less than or equal to totalSupply"); _maxWalletAmount = maxWalletAmount; } function setTaxes(uint256 marketingFee, uint256 liquidityFee) external onlyOwner() { uint256 totalFee = marketingFee.add(liquidityFee); require(totalFee.div(10) < 50, "Sum of fees must be less than 50"); _marketingFee = marketingFee; _liquidityFee = liquidityFee; _previousMarketingFee = _marketingFee; _previousLiquidityFee = _liquidityFee; uint256 totalETHfees = _marketingFee; _marketingPercent = (_marketingFee.mul(1000)).div(totalETHfees); emit FeesUpdated(_marketingFee, _liquidityFee); } function endTrdg(uint256 notpogBlocks) external onlyOwner() { require(trdg == true, "done"); trdg = false; openTrading(notpogBlocks); emit EndedTrdg(trdg); } }
True
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/** *Submitted for verification at Etherscan.io on 2021-05-25 */ // SPDX-License-Identifier: AGPL-3.0-or-later // hevm: flattened sources of contracts/FundingLocker.sol pragma solidity =0.6.11 >=0.6.0 <0.8.0 >=0.6.2 <0.8.0; ////// lib/openzeppelin-contracts/contracts/math/SafeMath.sol /* pragma solidity >=0.6.0 <0.8.0; */ /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when an * operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } ////// lib/openzeppelin-contracts/contracts/token/ERC20/IERC20.sol /* pragma solidity >=0.6.0 <0.8.0; */ /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } ////// lib/openzeppelin-contracts/contracts/utils/Address.sol /* pragma solidity >=0.6.2 <0.8.0; */ /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: value }(data); return _verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.staticcall(data); return _verifyCallResult(success, returndata, errorMessage); } function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } ////// lib/openzeppelin-contracts/contracts/token/ERC20/SafeERC20.sol /* pragma solidity >=0.6.0 <0.8.0; */ /* import "./IERC20.sol"; */ /* import "../../math/SafeMath.sol"; */ /* import "../../utils/Address.sol"; */ /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove(IERC20 token, address spender, uint256 value) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' // solhint-disable-next-line max-line-length require((value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } } ////// contracts/FundingLocker.sol /* pragma solidity 0.6.11; */ /* import "lib/openzeppelin-contracts/contracts/token/ERC20/SafeERC20.sol"; */ /// @title FundingLocker holds custody of Liquidity Asset tokens during the funding period of a Loan. contract FundingLocker { using SafeERC20 for IERC20; IERC20 public immutable liquidityAsset; // Asset the Loan was funded with. address public immutable loan; // Loan this FundingLocker has funded. constructor(address _liquidityAsset, address _loan) public { liquidityAsset = IERC20(_liquidityAsset); loan = _loan; } /** @dev Checks that `msg.sender` is the Loan. */ modifier isLoan() { require(msg.sender == loan, "FL:NOT_L"); _; } /** @dev Transfers amount of Liquidity Asset to a destination account. Only the Loan can call this function. @param dst Destination to transfer Liquidity Asset to. @param amt Amount of Liquidity Asset to transfer. */ function pull(address dst, uint256 amt) isLoan external { liquidityAsset.safeTransfer(dst, amt); } /** @dev Transfers entire amount of Liquidity Asset held in escrow to the Loan. Only the Loan can call this function. */ function drain() isLoan external { uint256 amt = liquidityAsset.balanceOf(address(this)); liquidityAsset.safeTransfer(loan, amt); } }
True
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pragma solidity 0.4.24; /** * @title ERC20Basic * @dev Simpler version of ERC20 interface * See https://github.com/ethereum/EIPs/issues/179 */ contract ERC20Basic { function totalSupply() public view returns (uint256); function balanceOf(address who) public view returns (uint256); function transfer(address to, uint256 value) public returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); } /** * @title Basic token * @dev Basic version of StandardToken, with no allowances. */ contract BasicToken is ERC20Basic { using SafeMath for uint256; mapping(address => uint256) balances; uint256 totalSupply_; /** * @dev Total number of tokens in existence */ function totalSupply() public view returns (uint256) { return totalSupply_; } /** * @dev Transfer token for a specified address * @param _to The address to transfer to. * @param _value The amount to be transferred. */ function transfer(address _to, uint256 _value) public returns (bool) { require(_to != address(0)); require(_value <= balances[msg.sender]); balances[msg.sender] = balances[msg.sender].sub(_value); balances[_to] = balances[_to].add(_value); emit Transfer(msg.sender, _to, _value); return true; } /** * @dev Gets the balance of the specified address. * @param _owner The address to query the the balance of. * @return An uint256 representing the amount owned by the passed address. */ function balanceOf(address _owner) public view returns (uint256) { return balances[_owner]; } } /** * @title ERC20 interface * @dev see https://github.com/ethereum/EIPs/issues/20 */ contract ERC20 is ERC20Basic { function allowance(address owner, address spender) public view returns (uint256); function transferFrom(address from, address to, uint256 value) public returns (bool); function approve(address spender, uint256 value) public returns (bool); event Approval( address indexed owner, address indexed spender, uint256 value ); } /** * @title Standard ERC20 token * * @dev Implementation of the basic standard token. * https://github.com/ethereum/EIPs/issues/20 * Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol */ contract StandardToken is ERC20, BasicToken { mapping (address => mapping (address => uint256)) internal allowed; /** * @dev Transfer tokens from one address to another * @param _from address The address which you want to send tokens from * @param _to address The address which you want to transfer to * @param _value uint256 the amount of tokens to be transferred */ function transferFrom( address _from, address _to, uint256 _value ) public returns (bool) { require(_to != address(0)); require(_value <= balances[_from]); require(_value <= allowed[_from][msg.sender]); balances[_from] = balances[_from].sub(_value); balances[_to] = balances[_to].add(_value); allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value); emit Transfer(_from, _to, _value); return true; } /** * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender. * Beware that changing an allowance with this method brings the risk that someone may use both the old * and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this * race condition is to first reduce the spender&#39;s allowance to 0 and set the desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * @param _spender The address which will spend the funds. * @param _value The amount of tokens to be spent. */ function approve(address _spender, uint256 _value) public returns (bool) { allowed[msg.sender][_spender] = _value; emit Approval(msg.sender, _spender, _value); return true; } /** * @dev Function to check the amount of tokens that an owner allowed to a spender. * @param _owner address The address which owns the funds. * @param _spender address The address which will spend the funds. * @return A uint256 specifying the amount of tokens still available for the spender. */ function allowance( address _owner, address _spender ) public view returns (uint256) { return allowed[_owner][_spender]; } /** * @dev Increase the amount of tokens that an owner allowed to a spender. * approve should be called when allowed[_spender] == 0. To increment * allowed value is better to use this function to avoid 2 calls (and wait until * the first transaction is mined) * From MonolithDAO Token.sol * @param _spender The address which will spend the funds. * @param _addedValue The amount of tokens to increase the allowance by. */ function increaseApproval( address _spender, uint256 _addedValue ) public returns (bool) { allowed[msg.sender][_spender] = ( allowed[msg.sender][_spender].add(_addedValue)); emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]); return true; } /** * @dev Decrease the amount of tokens that an owner allowed to a spender. * approve should be called when allowed[_spender] == 0. To decrement * allowed value is better to use this function to avoid 2 calls (and wait until * the first transaction is mined) * From MonolithDAO Token.sol * @param _spender The address which will spend the funds. * @param _subtractedValue The amount of tokens to decrease the allowance by. */ function decreaseApproval( address _spender, uint256 _subtractedValue ) public returns (bool) { uint256 oldValue = allowed[msg.sender][_spender]; if (_subtractedValue > oldValue) { allowed[msg.sender][_spender] = 0; } else { allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue); } emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]); return true; } } /** * @title Ownable * @dev The Ownable contract has an owner address, and provides basic authorization control * functions, this simplifies the implementation of "user permissions". */ contract Ownable { address public owner; event OwnershipRenounced(address indexed previousOwner); event OwnershipTransferred( address indexed previousOwner, address indexed newOwner ); /** * @dev The Ownable constructor sets the original `owner` of the contract to the sender * account. */ constructor() public { owner = msg.sender; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(msg.sender == owner); _; } /** * @dev Allows the current owner to relinquish control of the contract. * @notice Renouncing to ownership will leave the contract without an owner. * It will not be possible to call the functions with the `onlyOwner` * modifier anymore. */ function renounceOwnership() public onlyOwner { emit OwnershipRenounced(owner); owner = address(0); } /** * @dev Allows the current owner to transfer control of the contract to a newOwner. * @param _newOwner The address to transfer ownership to. */ function transferOwnership(address _newOwner) public onlyOwner { _transferOwnership(_newOwner); } /** * @dev Transfers control of the contract to a newOwner. * @param _newOwner The address to transfer ownership to. */ function _transferOwnership(address _newOwner) internal { require(_newOwner != address(0)); emit OwnershipTransferred(owner, _newOwner); owner = _newOwner; } } /* * @title String & slice utility library for Solidity contracts. * @author Nick Johnson <[email protected]> * * @dev Functionality in this library is largely implemented using an * abstraction called a &#39;slice&#39;. A slice represents a part of a string - * anything from the entire string to a single character, or even no * characters at all (a 0-length slice). Since a slice only has to specify * an offset and a length, copying and manipulating slices is a lot less * expensive than copying and manipulating the strings they reference. * * To further reduce gas costs, most functions on slice that need to return * a slice modify the original one instead of allocating a new one; for * instance, `s.split(".")` will return the text up to the first &#39;.&#39;, * modifying s to only contain the remainder of the string after the &#39;.&#39;. * In situations where you do not want to modify the original slice, you * can make a copy first with `.copy()`, for example: * `s.copy().split(".")`. Try and avoid using this idiom in loops; since * Solidity has no memory management, it will result in allocating many * short-lived slices that are later discarded. * * Functions that return two slices come in two versions: a non-allocating * version that takes the second slice as an argument, modifying it in * place, and an allocating version that allocates and returns the second * slice; see `nextRune` for example. * * Functions that have to copy string data will return strings rather than * slices; these can be cast back to slices for further processing if * required. * * For convenience, some functions are provided with non-modifying * variants that create a new slice and return both; for instance, * `s.splitNew(&#39;.&#39;)` leaves s unmodified, and returns two values * corresponding to the left and right parts of the string. */ library strings { struct slice { uint _len; uint _ptr; } function memcpy(uint dest, uint src, uint len) private pure { // Copy word-length chunks while possible for(; len >= 32; len -= 32) { assembly { mstore(dest, mload(src)) } dest += 32; src += 32; } // Copy remaining bytes uint mask = 256 ** (32 - len) - 1; assembly { let srcpart := and(mload(src), not(mask)) let destpart := and(mload(dest), mask) mstore(dest, or(destpart, srcpart)) } } /* * @dev Returns a slice containing the entire string. * @param self The string to make a slice from. * @return A newly allocated slice containing the entire string. */ function toSlice(string self) internal pure returns (slice) { uint ptr; assembly { ptr := add(self, 0x20) } return slice(bytes(self).length, ptr); } /* * @dev Returns the length of a null-terminated bytes32 string. * @param self The value to find the length of. * @return The length of the string, from 0 to 32. */ function len(bytes32 self) internal pure returns (uint) { uint ret; if (self == 0) return 0; if (self & 0xffffffffffffffffffffffffffffffff == 0) { ret += 16; self = bytes32(uint(self) / 0x100000000000000000000000000000000); } if (self & 0xffffffffffffffff == 0) { ret += 8; self = bytes32(uint(self) / 0x10000000000000000); } if (self & 0xffffffff == 0) { ret += 4; self = bytes32(uint(self) / 0x100000000); } if (self & 0xffff == 0) { ret += 2; self = bytes32(uint(self) / 0x10000); } if (self & 0xff == 0) { ret += 1; } return 32 - ret; } /* * @dev Returns a slice containing the entire bytes32, interpreted as a * null-terminated utf-8 string. * @param self The bytes32 value to convert to a slice. * @return A new slice containing the value of the input argument up to the * first null. */ function toSliceB32(bytes32 self) internal pure returns (slice ret) { // Allocate space for `self` in memory, copy it there, and point ret at it assembly { let ptr := mload(0x40) mstore(0x40, add(ptr, 0x20)) mstore(ptr, self) mstore(add(ret, 0x20), ptr) } ret._len = len(self); } /* * @dev Returns a new slice containing the same data as the current slice. * @param self The slice to copy. * @return A new slice containing the same data as `self`. */ function copy(slice self) internal pure returns (slice) { return slice(self._len, self._ptr); } /* * @dev Copies a slice to a new string. * @param self The slice to copy. * @return A newly allocated string containing the slice&#39;s text. */ function toString(slice self) internal pure returns (string) { string memory ret = new string(self._len); uint retptr; assembly { retptr := add(ret, 32) } memcpy(retptr, self._ptr, self._len); return ret; } /* * @dev Returns the length in runes of the slice. Note that this operation * takes time proportional to the length of the slice; avoid using it * in loops, and call `slice.empty()` if you only need to know whether * the slice is empty or not. * @param self The slice to operate on. * @return The length of the slice in runes. */ function len(slice self) internal pure returns (uint l) { // Starting at ptr-31 means the LSB will be the byte we care about uint ptr = self._ptr - 31; uint end = ptr + self._len; for (l = 0; ptr < end; l++) { uint8 b; assembly { b := and(mload(ptr), 0xFF) } if (b < 0x80) { ptr += 1; } else if(b < 0xE0) { ptr += 2; } else if(b < 0xF0) { ptr += 3; } else if(b < 0xF8) { ptr += 4; } else if(b < 0xFC) { ptr += 5; } else { ptr += 6; } } } /* * @dev Returns true if the slice is empty (has a length of 0). * @param self The slice to operate on. * @return True if the slice is empty, False otherwise. */ function empty(slice self) internal pure returns (bool) { return self._len == 0; } /* * @dev Returns a positive number if `other` comes lexicographically after * `self`, a negative number if it comes before, or zero if the * contents of the two slices are equal. Comparison is done per-rune, * on unicode codepoints. * @param self The first slice to compare. * @param other The second slice to compare. * @return The result of the comparison. */ function compare(slice self, slice other) internal pure returns (int) { uint shortest = self._len; if (other._len < self._len) shortest = other._len; uint selfptr = self._ptr; uint otherptr = other._ptr; for (uint idx = 0; idx < shortest; idx += 32) { uint a; uint b; assembly { a := mload(selfptr) b := mload(otherptr) } if (a != b) { // Mask out irrelevant bytes and check again uint256 mask = uint256(-1); // 0xffff... if(shortest < 32) { mask = ~(2 ** (8 * (32 - shortest + idx)) - 1); } uint256 diff = (a & mask) - (b & mask); if (diff != 0) return int(diff); } selfptr += 32; otherptr += 32; } return int(self._len) - int(other._len); } /* * @dev Returns true if the two slices contain the same text. * @param self The first slice to compare. * @param self The second slice to compare. * @return True if the slices are equal, false otherwise. */ function equals(slice self, slice other) internal pure returns (bool) { return compare(self, other) == 0; } /* * @dev Extracts the first rune in the slice into `rune`, advancing the * slice to point to the next rune and returning `self`. * @param self The slice to operate on. * @param rune The slice that will contain the first rune. * @return `rune`. */ function nextRune(slice self, slice rune) internal pure returns (slice) { rune._ptr = self._ptr; if (self._len == 0) { rune._len = 0; return rune; } uint l; uint b; // Load the first byte of the rune into the LSBs of b assembly { b := and(mload(sub(mload(add(self, 32)), 31)), 0xFF) } if (b < 0x80) { l = 1; } else if(b < 0xE0) { l = 2; } else if(b < 0xF0) { l = 3; } else { l = 4; } // Check for truncated codepoints if (l > self._len) { rune._len = self._len; self._ptr += self._len; self._len = 0; return rune; } self._ptr += l; self._len -= l; rune._len = l; return rune; } /* * @dev Returns the first rune in the slice, advancing the slice to point * to the next rune. * @param self The slice to operate on. * @return A slice containing only the first rune from `self`. */ function nextRune(slice self) internal pure returns (slice ret) { nextRune(self, ret); } /* * @dev Returns the number of the first codepoint in the slice. * @param self The slice to operate on. * @return The number of the first codepoint in the slice. */ function ord(slice self) internal pure returns (uint ret) { if (self._len == 0) { return 0; } uint word; uint length; uint divisor = 2 ** 248; // Load the rune into the MSBs of b assembly { word:= mload(mload(add(self, 32))) } uint b = word / divisor; if (b < 0x80) { ret = b; length = 1; } else if(b < 0xE0) { ret = b & 0x1F; length = 2; } else if(b < 0xF0) { ret = b & 0x0F; length = 3; } else { ret = b & 0x07; length = 4; } // Check for truncated codepoints if (length > self._len) { return 0; } for (uint i = 1; i < length; i++) { divisor = divisor / 256; b = (word / divisor) & 0xFF; if (b & 0xC0 != 0x80) { // Invalid UTF-8 sequence return 0; } ret = (ret * 64) | (b & 0x3F); } return ret; } /* * @dev Returns the keccak-256 hash of the slice. * @param self The slice to hash. * @return The hash of the slice. */ function keccak(slice self) internal pure returns (bytes32 ret) { assembly { ret := keccak256(mload(add(self, 32)), mload(self)) } } /* * @dev Returns true if `self` starts with `needle`. * @param self The slice to operate on. * @param needle The slice to search for. * @return True if the slice starts with the provided text, false otherwise. */ function startsWith(slice self, slice needle) internal pure returns (bool) { if (self._len < needle._len) { return false; } if (self._ptr == needle._ptr) { return true; } bool equal; assembly { let length := mload(needle) let selfptr := mload(add(self, 0x20)) let needleptr := mload(add(needle, 0x20)) equal := eq(keccak256(selfptr, length), keccak256(needleptr, length)) } return equal; } /* * @dev If `self` starts with `needle`, `needle` is removed from the * beginning of `self`. Otherwise, `self` is unmodified. * @param self The slice to operate on. * @param needle The slice to search for. * @return `self` */ function beyond(slice self, slice needle) internal pure returns (slice) { if (self._len < needle._len) { return self; } bool equal = true; if (self._ptr != needle._ptr) { assembly { let length := mload(needle) let selfptr := mload(add(self, 0x20)) let needleptr := mload(add(needle, 0x20)) equal := eq(sha3(selfptr, length), sha3(needleptr, length)) } } if (equal) { self._len -= needle._len; self._ptr += needle._len; } return self; } /* * @dev Returns true if the slice ends with `needle`. * @param self The slice to operate on. * @param needle The slice to search for. * @return True if the slice starts with the provided text, false otherwise. */ function endsWith(slice self, slice needle) internal pure returns (bool) { if (self._len < needle._len) { return false; } uint selfptr = self._ptr + self._len - needle._len; if (selfptr == needle._ptr) { return true; } bool equal; assembly { let length := mload(needle) let needleptr := mload(add(needle, 0x20)) equal := eq(keccak256(selfptr, length), keccak256(needleptr, length)) } return equal; } /* * @dev If `self` ends with `needle`, `needle` is removed from the * end of `self`. Otherwise, `self` is unmodified. * @param self The slice to operate on. * @param needle The slice to search for. * @return `self` */ function until(slice self, slice needle) internal pure returns (slice) { if (self._len < needle._len) { return self; } uint selfptr = self._ptr + self._len - needle._len; bool equal = true; if (selfptr != needle._ptr) { assembly { let length := mload(needle) let needleptr := mload(add(needle, 0x20)) equal := eq(keccak256(selfptr, length), keccak256(needleptr, length)) } } if (equal) { self._len -= needle._len; } return self; } event log_bytemask(bytes32 mask); // Returns the memory address of the first byte of the first occurrence of // `needle` in `self`, or the first byte after `self` if not found. function findPtr(uint selflen, uint selfptr, uint needlelen, uint needleptr) private pure returns (uint) { uint ptr = selfptr; uint idx; if (needlelen <= selflen) { if (needlelen <= 32) { bytes32 mask = bytes32(~(2 ** (8 * (32 - needlelen)) - 1)); bytes32 needledata; assembly { needledata := and(mload(needleptr), mask) } uint end = selfptr + selflen - needlelen; bytes32 ptrdata; assembly { ptrdata := and(mload(ptr), mask) } while (ptrdata != needledata) { if (ptr >= end) return selfptr + selflen; ptr++; assembly { ptrdata := and(mload(ptr), mask) } } return ptr; } else { // For long needles, use hashing bytes32 hash; assembly { hash := sha3(needleptr, needlelen) } for (idx = 0; idx <= selflen - needlelen; idx++) { bytes32 testHash; assembly { testHash := sha3(ptr, needlelen) } if (hash == testHash) return ptr; ptr += 1; } } } return selfptr + selflen; } // Returns the memory address of the first byte after the last occurrence of // `needle` in `self`, or the address of `self` if not found. function rfindPtr(uint selflen, uint selfptr, uint needlelen, uint needleptr) private pure returns (uint) { uint ptr; if (needlelen <= selflen) { if (needlelen <= 32) { bytes32 mask = bytes32(~(2 ** (8 * (32 - needlelen)) - 1)); bytes32 needledata; assembly { needledata := and(mload(needleptr), mask) } ptr = selfptr + selflen - needlelen; bytes32 ptrdata; assembly { ptrdata := and(mload(ptr), mask) } while (ptrdata != needledata) { if (ptr <= selfptr) return selfptr; ptr--; assembly { ptrdata := and(mload(ptr), mask) } } return ptr + needlelen; } else { // For long needles, use hashing bytes32 hash; assembly { hash := sha3(needleptr, needlelen) } ptr = selfptr + (selflen - needlelen); while (ptr >= selfptr) { bytes32 testHash; assembly { testHash := sha3(ptr, needlelen) } if (hash == testHash) return ptr + needlelen; ptr -= 1; } } } return selfptr; } /* * @dev Modifies `self` to contain everything from the first occurrence of * `needle` to the end of the slice. `self` is set to the empty slice * if `needle` is not found. * @param self The slice to search and modify. * @param needle The text to search for. * @return `self`. */ function find(slice self, slice needle) internal pure returns (slice) { uint ptr = findPtr(self._len, self._ptr, needle._len, needle._ptr); self._len -= ptr - self._ptr; self._ptr = ptr; return self; } /* * @dev Modifies `self` to contain the part of the string from the start of * `self` to the end of the first occurrence of `needle`. If `needle` * is not found, `self` is set to the empty slice. * @param self The slice to search and modify. * @param needle The text to search for. * @return `self`. */ function rfind(slice self, slice needle) internal pure returns (slice) { uint ptr = rfindPtr(self._len, self._ptr, needle._len, needle._ptr); self._len = ptr - self._ptr; return self; } /* * @dev Splits the slice, setting `self` to everything after the first * occurrence of `needle`, and `token` to everything before it. If * `needle` does not occur in `self`, `self` is set to the empty slice, * and `token` is set to the entirety of `self`. * @param self The slice to split. * @param needle The text to search for in `self`. * @param token An output parameter to which the first token is written. * @return `token`. */ function split(slice self, slice needle, slice token) internal pure returns (slice) { uint ptr = findPtr(self._len, self._ptr, needle._len, needle._ptr); token._ptr = self._ptr; token._len = ptr - self._ptr; if (ptr == self._ptr + self._len) { // Not found self._len = 0; } else { self._len -= token._len + needle._len; self._ptr = ptr + needle._len; } return token; } /* * @dev Splits the slice, setting `self` to everything after the first * occurrence of `needle`, and returning everything before it. If * `needle` does not occur in `self`, `self` is set to the empty slice, * and the entirety of `self` is returned. * @param self The slice to split. * @param needle The text to search for in `self`. * @return The part of `self` up to the first occurrence of `delim`. */ function split(slice self, slice needle) internal pure returns (slice token) { split(self, needle, token); } /* * @dev Splits the slice, setting `self` to everything before the last * occurrence of `needle`, and `token` to everything after it. If * `needle` does not occur in `self`, `self` is set to the empty slice, * and `token` is set to the entirety of `self`. * @param self The slice to split. * @param needle The text to search for in `self`. * @param token An output parameter to which the first token is written. * @return `token`. */ function rsplit(slice self, slice needle, slice token) internal pure returns (slice) { uint ptr = rfindPtr(self._len, self._ptr, needle._len, needle._ptr); token._ptr = ptr; token._len = self._len - (ptr - self._ptr); if (ptr == self._ptr) { // Not found self._len = 0; } else { self._len -= token._len + needle._len; } return token; } /* * @dev Splits the slice, setting `self` to everything before the last * occurrence of `needle`, and returning everything after it. If * `needle` does not occur in `self`, `self` is set to the empty slice, * and the entirety of `self` is returned. * @param self The slice to split. * @param needle The text to search for in `self`. * @return The part of `self` after the last occurrence of `delim`. */ function rsplit(slice self, slice needle) internal pure returns (slice token) { rsplit(self, needle, token); } /* * @dev Counts the number of nonoverlapping occurrences of `needle` in `self`. * @param self The slice to search. * @param needle The text to search for in `self`. * @return The number of occurrences of `needle` found in `self`. */ function count(slice self, slice needle) internal pure returns (uint cnt) { uint ptr = findPtr(self._len, self._ptr, needle._len, needle._ptr) + needle._len; while (ptr <= self._ptr + self._len) { cnt++; ptr = findPtr(self._len - (ptr - self._ptr), ptr, needle._len, needle._ptr) + needle._len; } } /* * @dev Returns True if `self` contains `needle`. * @param self The slice to search. * @param needle The text to search for in `self`. * @return True if `needle` is found in `self`, false otherwise. */ function contains(slice self, slice needle) internal pure returns (bool) { return rfindPtr(self._len, self._ptr, needle._len, needle._ptr) != self._ptr; } /* * @dev Returns a newly allocated string containing the concatenation of * `self` and `other`. * @param self The first slice to concatenate. * @param other The second slice to concatenate. * @return The concatenation of the two strings. */ function concat(slice self, slice other) internal pure returns (string) { string memory ret = new string(self._len + other._len); uint retptr; assembly { retptr := add(ret, 32) } memcpy(retptr, self._ptr, self._len); memcpy(retptr + self._len, other._ptr, other._len); return ret; } /* * @dev Joins an array of slices, using `self` as a delimiter, returning a * newly allocated string. * @param self The delimiter to use. * @param parts A list of slices to join. * @return A newly allocated string containing all the slices in `parts`, * joined with `self`. */ function join(slice self, slice[] parts) internal pure returns (string) { if (parts.length == 0) return ""; uint length = self._len * (parts.length - 1); for(uint i = 0; i < parts.length; i++) length += parts[i]._len; string memory ret = new string(length); uint retptr; assembly { retptr := add(ret, 32) } for(i = 0; i < parts.length; i++) { memcpy(retptr, parts[i]._ptr, parts[i]._len); retptr += parts[i]._len; if (i < parts.length - 1) { memcpy(retptr, self._ptr, self._len); retptr += self._len; } } return ret; } } /** * @title SafeMath * @dev Math operations with safety checks that throw on error */ library SafeMath { /** * @dev Multiplies two numbers, throws on overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256 c) { // Gas optimization: this is cheaper than asserting &#39;a&#39; not being zero, but the // benefit is lost if &#39;b&#39; is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522 if (a == 0) { return 0; } c = a * b; assert(c / a == b); return c; } /** * @dev Integer division of two numbers, truncating the quotient. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { // assert(b > 0); // Solidity automatically throws when dividing by 0 // uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn&#39;t hold return a / b; } /** * @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend). */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { assert(b <= a); return a - b; } /** * @dev Adds two numbers, throws on overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256 c) { c = a + b; assert(c >= a); return c; } } pragma solidity 0.4.24; contract SparksterToken is StandardToken, Ownable{ using strings for *; using SafeMath for uint256; struct Member { mapping(uint256 => uint256) weiBalance; // How much eth has this member contributed for this group? mapping(uint256 => uint256) tokenBalance; // The member&#39;s token balance in a specific group. int256 transferred; // The amount of tokens the member has transferred out or been transferred in. Sending tokens out will increase this value and accepting tokens in will decrease it. In other words, the more negative this value is, the more unlocked tokens the member holds. bool exists; // A flag to see if we have a record of this member or not. } struct Group { bool distributed; // Whether or not tokens in this group have been distributed. bool distributing; // This flag is set when we first enter the distribute function and is there to prevent race conditions, since distribution might take a long time. bool unlocked; // Whether or not tokens in this group have been unlocked. uint256 ratio; // 1 eth:ratio tokens. This amount represents the decimal amount. ratio*10**decimal = ratio sparks. uint256 startTime; // Epoch of crowdsale start time. uint256 phase1endTime; // Epoch of phase1 end time. uint256 phase2endTime; // Epoch of phase2 end time. uint256 deadline; // No contributions allowed after this epoch. uint256 max2; // cap of phase2 uint256 max3; // Total ether this group can collect in phase 3. uint256 weiTotal; // How much ether has this group collected? uint256 cap; // The hard ether cap. uint256 howManyDistributed; uint256 howManyTotal; // Total people in this group, set when distributing. } address oracleAddress = 0xCb3405Fd5212C8B6a16DeFf9eBa49E69478A61b8; bool public transferLock = true; // A Global transfer lock. Set to lock down all tokens from all groups. bool public allowedToSell = false; bool public allowedToPurchase = false; string public name; // name for display string public symbol; //An identifier uint8 public decimals; //How many decimals to show. uint256 public penalty; uint256 public maxGasPrice; // The maximum allowed gas for the purchase function. uint256 internal nextGroupNumber; uint256 public sellPrice; // sellPrice wei:1 spark token; we won&#39;t allow to sell back parts of a token. address[] internal allMembers; address[] internal allNonMembers; mapping(address => bool) internal nonMemberTransfers; mapping(address => Member) internal members; mapping(uint256 => Group) internal groups; uint256 public openGroupNumber; event WantsToPurchase(address walletAddress, uint256 weiAmount, uint256 groupNumber, bool inPhase1); event WantsToDistribute(uint256 groupNumber, uint256 startIndex, uint256 endIndex); event NearingHardCap(uint256 groupNumber, uint256 remainder); event ReachedHardCap(uint256 groupNumber); event DistributeDone(uint256 groupNumber); event UnlockDone(uint256 groupNumber); event GroupCreated(uint256 groupNumber, uint256 startTime, uint256 phase1endTime, uint256 phase2endTime, uint256 deadline, uint256 phase2cap, uint256 phase3cap, uint256 cap, uint256 ratio); event AddToGroup(address walletAddress, uint256 groupNumber); event ChangedAllowedToSell(bool allowedToSell); event ChangedAllowedToPurchase(bool allowedToPurchase); event ChangedTransferLock(bool transferLock); event SetSellPrice(uint256 sellPrice); event SplitTokens(uint256 splitFactor); event ReverseSplitTokens(uint256 splitFactor); modifier onlyOracleBackend() { require(msg.sender == oracleAddress); _; } // Fix for the ERC20 short address attack http://vessenes.com/the-erc20-short-address-attack-explained/ modifier onlyPayloadSize(uint size) { require(msg.data.length == size + 4); _; } modifier canTransfer() { require(!transferLock); _; } modifier canPurchase() { require(allowedToPurchase); _; } modifier canSell() { require(allowedToSell); _; } function() public payable { purchase(); } constructor() public { name = "Sparkster"; // Set the name for display purposes decimals = 18; // Amount of decimals for display purposes symbol = "SPRK"; // Set the symbol for display purposes setMaximumGasPrice(40); // Give all the tokens to the owner to start with. mintTokens(435000000); } function setOracleAddress(address newAddress) public onlyOwner returns(bool success) { oracleAddress = newAddress; return true; } function setMaximumGasPrice(uint256 gweiPrice) public onlyOwner returns(bool success) { maxGasPrice = gweiPrice.mul(10**9); // Convert the gwei value to wei. return true; } function parseAddr(string _a) pure internal returns (address){ // From Oraclize bytes memory tmp = bytes(_a); uint160 iaddr = 0; uint160 b1; uint160 b2; for (uint i=2; i<2+2*20; i+=2){ iaddr *= 256; b1 = uint160(tmp[i]); b2 = uint160(tmp[i+1]); if ((b1 >= 97)&&(b1 <= 102)) b1 -= 87; else if ((b1 >= 48)&&(b1 <= 57)) b1 -= 48; if ((b2 >= 97)&&(b2 <= 102)) b2 -= 87; else if ((b2 >= 48)&&(b2 <= 57)) b2 -= 48; iaddr += (b1*16+b2); } return address(iaddr); } function parseInt(string _a, uint _b) pure internal returns (uint) { bytes memory bresult = bytes(_a); uint mint = 0; bool decim = false; for (uint i = 0; i < bresult.length; i++) { if ((bresult[i] >= 48) && (bresult[i] <= 57)) { if (decim) { if (_b == 0) break; else _b--; } mint *= 10; mint += uint(bresult[i]) - 48; } else if (bresult[i] == 46) decim = true; } return mint; } function mintTokens(uint256 amount) public onlyOwner { // Here, we&#39;ll consider amount to be the full token amount, so we have to get its decimal value. uint256 decimalAmount = amount.mul(uint(10)**decimals); totalSupply_ = totalSupply_.add(decimalAmount); balances[msg.sender] = balances[msg.sender].add(decimalAmount); emit Transfer(address(0), msg.sender, decimalAmount); // Per erc20 standards-compliance. } function purchase() public canPurchase payable returns(bool success) { require(msg.sender != address(0)); // Don&#39;t allow the 0 address. Member storage memberRecord = members[msg.sender]; Group storage openGroup = groups[openGroupNumber]; require(openGroup.ratio > 0); // Group must be initialized. uint256 currentTimestamp = block.timestamp; require(currentTimestamp >= openGroup.startTime && currentTimestamp <= openGroup.deadline); //the timestamp must be greater than or equal to the start time and less than or equal to the deadline time require(!openGroup.distributing && !openGroup.distributed); // member must exist; Don&#39;t allow to purchase if we&#39;re in the middle of distributing this group; Don&#39;t let someone buy tokens on the current group if that group is already distributed, unlocked or both; don&#39;t allow member to purchase if they&#39;re not part of the open group. require(tx.gasprice <= maxGasPrice); // Restrict maximum gas this transaction is allowed to consume. uint256 weiAmount = msg.value; // The amount purchased by the current member require(weiAmount >= 0.1 ether); uint256 weiTotal = openGroup.weiTotal.add(weiAmount); // Calculate total contribution of all members in this group. require(weiTotal <= openGroup.cap); // Check to see if accepting these funds will put us above the hard ether cap. uint256 userWeiTotal = memberRecord.weiBalance[openGroupNumber].add(weiAmount); // Calculate the total amount purchased by the current member if(currentTimestamp <= openGroup.phase1endTime){ // whether the current timestamp is in the first phase emit WantsToPurchase(msg.sender, weiAmount, openGroupNumber, true); return true; } else if (currentTimestamp <= openGroup.phase2endTime) { // Are we in phase 2? require(userWeiTotal <= openGroup.max2); // Allow to contribute no more than max2 in phase 2. emit WantsToPurchase(msg.sender, weiAmount, openGroupNumber, false); return true; } else { // We&#39;ve passed both phases 1 and 2. require(userWeiTotal <= openGroup.max3); // Don&#39;t allow to contribute more than max3 in phase 3. emit WantsToPurchase(msg.sender, weiAmount, openGroupNumber, false); return true; } } function purchaseCallback(string uploadedData) public onlyOracleBackend returns(bool success) { // We&#39;ll separate records by a | and individual entries in the record by a :. strings.slice memory uploadedSlice = uploadedData.toSlice(); strings.slice memory nextRecord = "".toSlice(); strings.slice memory nextDatum = "".toSlice(); strings.slice memory recordSeparator = "|".toSlice(); strings.slice memory datumSeparator = ":".toSlice(); uint256 amountForOwner = 0; while (!uploadedSlice.empty()) { nextRecord = uploadedSlice.split(recordSeparator); nextDatum = nextRecord.split(datumSeparator); uint256 accepted = parseInt(nextDatum.toString(), 0); nextDatum = nextRecord.split(datumSeparator); address theAddress = parseAddr(nextDatum.toString()); if (accepted > 0) { Member storage memberRecord = members[theAddress]; nextDatum = nextRecord.split(datumSeparator); uint256 weiAmount = parseInt(nextDatum.toString(), 0); amountForOwner = amountForOwner.add(weiAmount); nextDatum = nextRecord.split(datumSeparator); uint256 groupNumber = parseInt(nextDatum.toString(), 0); Group storage theGroup = groups[groupNumber]; uint256 tokenAmount = weiAmount.mul(theGroup.ratio); //calculate member token amount. theGroup.weiTotal = theGroup.weiTotal.add(weiAmount); // Calculate the total amount purchased by all members in this group. memberRecord.weiBalance[groupNumber] = memberRecord.weiBalance[groupNumber].add(weiAmount); // Record the total amount purchased by the current member memberRecord.tokenBalance[groupNumber] = memberRecord.tokenBalance[groupNumber].add(tokenAmount); // Update the member&#39;s token amount. balances[owner] = balances[owner].sub(tokenAmount); // Update the available number of tokens. if (!memberRecord.exists) { // We&#39;re seeing this one for the first time. allMembers.push(theAddress); memberRecord.exists = true; if (balances[theAddress] > 0) { // Don&#39;t inadvertently lock their previously held tokens before they became a member. memberRecord.transferred = -int(balances[theAddress]); } } } else { if (penalty >= weiAmount) { amountForOwner = amountForOwner.add(penalty); weiAmount = weiAmount.sub(penalty); } if (address(this).balance >= weiAmount) { theAddress.transfer(weiAmount); } } if (internalGetHowMuchUntilHardCap(groupNumber) <= 100 ether) { emit NearingHardCap(groupNumber, internalGetHowMuchUntilHardCap(groupNumber)); } if (theGroup.weiTotal == theGroup.cap) { emit ReachedHardCap(groupNumber); } } if (address(this).balance >= amountForOwner) { owner.transfer(amountForOwner); } return true; } function drain() public onlyOwner { owner.transfer(address(this).balance); } function setPenalty(uint256 newPenalty) public onlyOwner returns(bool success) { penalty = newPenalty; return true; } function sell(uint256 amount) public canSell { // Can&#39;t sell unless owner has allowed it. uint256 decimalAmount = amount.mul(uint(10)**decimals); // convert the full token value to the smallest unit possible. Member storage theMember = members[msg.sender]; if (theMember.exists) { // If this seller exists, they have an unlocked balance we need to take care of. int256 sellValue = theMember.transferred + int(decimalAmount); require(sellValue >= theMember.transferred); // Check for overflow. require(sellValue <= int(getUnlockedBalanceLimit(msg.sender))); // Make sure they&#39;re not selling more than their unlocked amount. theMember.transferred = sellValue; } balances[msg.sender] = balances[msg.sender].sub(decimalAmount); // Do this before transferring to avoid re-entrance attacks; will throw if result < 0. // Amount is considered to be how many full tokens the user wants to sell. uint256 totalCost = amount.mul(sellPrice); // sellPrice is the per-full-token value. require(address(this).balance >= totalCost); // The contract must have enough funds to cover the selling. balances[owner] = balances[owner].add(decimalAmount); // Put these tokens back into the available pile. msg.sender.transfer(totalCost); // Pay the seller for their tokens. emit Transfer(msg.sender, owner, decimalAmount); // Notify exchanges of the sell. } function fundContract() public onlyOwner payable { // For the owner to put funds into the contract. } function setSellPrice(uint256 thePrice) public onlyOwner { sellPrice = thePrice; emit SetSellPrice(sellPrice); } function setAllowedToSell(bool value) public onlyOwner { allowedToSell = value; emit ChangedAllowedToSell(allowedToSell); } function setAllowedToPurchase(bool value) public onlyOwner { allowedToPurchase = value; emit ChangedAllowedToPurchase(allowedToPurchase); } function createGroup(uint256 startEpoch, uint256 phase1endEpoch, uint256 phase2endEpoch, uint256 deadlineEpoch, uint256 phase2cap, uint256 phase3cap, uint256 etherCap, uint256 ratio) public onlyOwner returns (bool success, uint256 createdGroupNumber) { Group storage theGroup = groups[nextGroupNumber]; theGroup.startTime = startEpoch; theGroup.phase1endTime = phase1endEpoch; theGroup.phase2endTime = phase2endEpoch; theGroup.deadline = deadlineEpoch; theGroup.max2 = phase2cap; theGroup.max3 = phase3cap; theGroup.cap = etherCap; theGroup.ratio = ratio; createdGroupNumber = nextGroupNumber; nextGroupNumber++; success = true; emit GroupCreated(createdGroupNumber, startEpoch, phase1endEpoch, phase2endEpoch, deadlineEpoch, phase2cap, phase3cap, etherCap, ratio); } function createGroup() public onlyOwner returns (bool success, uint256 createdGroupNumber) { return createGroup(0, 0, 0, 0, 0, 0, 0, 0); } function getGroup(uint256 groupNumber) public view returns(bool distributed, bool unlocked, uint256 phase2cap, uint256 phase3cap, uint256 cap, uint256 ratio, uint256 startTime, uint256 phase1endTime, uint256 phase2endTime, uint256 deadline, uint256 weiTotal, uint256 howManyDistributed) { require(groupNumber < nextGroupNumber); Group storage theGroup = groups[groupNumber]; distributed = theGroup.distributed; unlocked = theGroup.unlocked; phase2cap = theGroup.max2; phase3cap = theGroup.max3; cap = theGroup.cap; ratio = theGroup.ratio; startTime = theGroup.startTime; phase1endTime = theGroup.phase1endTime; phase2endTime = theGroup.phase2endTime; deadline = theGroup.deadline; weiTotal = theGroup.weiTotal; howManyDistributed = theGroup.howManyDistributed; } function internalGetHowMuchUntilHardCap(uint256 groupNumber) internal view returns(uint256 remainder) { return groups[groupNumber].cap.sub(groups[groupNumber].weiTotal); } function getHowMuchUntilHardCap() public view returns(uint256 remainder) { return internalGetHowMuchUntilHardCap(openGroupNumber); } function getHowManyLeftToDistribute(uint256 groupNumber) public view returns(uint256 howManyLeftToDistribute) { require(groupNumber < nextGroupNumber); Group storage theGroup = groups[groupNumber]; howManyLeftToDistribute = theGroup.howManyTotal - theGroup.howManyDistributed; // No need to use SafeMath here since we&#39;re guaranteed to not underflow on this line. } function addMemberToGroup(address walletAddress, uint256 groupNumber) public onlyOwner returns(bool success) { emit AddToGroup(walletAddress, groupNumber); return true; } function distribute(uint256 groupNumber, uint256 howMany) public onlyOwner { Group storage theGroup = groups[groupNumber]; require(groupNumber < nextGroupNumber && !theGroup.distributed); // can&#39;t have already distributed emit WantsToDistribute(groupNumber, theGroup.howManyDistributed, theGroup.howManyDistributed + howMany); } function distributeCallback(uint256 groupNumber, uint256 totalInGroup, address[] addresses) public onlyOracleBackend returns (bool success) { Group storage theGroup = groups[groupNumber]; theGroup.distributing = true; uint256 n = addresses.length; theGroup.howManyTotal = totalInGroup; for (uint256 i = 0; i < n; i++) { // This section might be expensive in terms of gas cost! address memberAddress = addresses[i]; Member storage currentMember = members[memberAddress]; uint256 balance = currentMember.tokenBalance[groupNumber]; if (balance > 0) { // No need to waste ticks if they have no tokens to distribute balances[memberAddress] = balances[memberAddress].add(balance); emit Transfer(owner, memberAddress, balance); // Notify exchanges of the distribution. } } theGroup.howManyDistributed = theGroup.howManyDistributed.add(n); if (theGroup.howManyDistributed == theGroup.howManyTotal) { // Done distributing all members. theGroup.distributed = true; theGroup.distributing = false; emit DistributeDone(groupNumber); } return true; } function getUnlockedBalanceLimit(address walletAddress) internal view returns(uint256 balance) { Member storage theMember = members[walletAddress]; if (!theMember.exists) { return balances[walletAddress]; } for (uint256 i = 0; i < nextGroupNumber; i++) { if (groups[i].unlocked) { balance = balance.add(theMember.tokenBalance[i]); } } return balance; } function getUnlockedTokens(address walletAddress) public view returns(uint256 balance) { Member storage theMember = members[walletAddress]; if (!theMember.exists) { return balances[walletAddress]; } return uint256(int(getUnlockedBalanceLimit(walletAddress)) - theMember.transferred); } function unlock(uint256 groupNumber) public onlyOwner returns (bool success) { Group storage theGroup = groups[groupNumber]; require(theGroup.distributed); // Distribution must have occurred first. theGroup.unlocked = true; emit UnlockDone(groupNumber); return true; } function setTransferLock(bool value) public onlyOwner { transferLock = value; emit ChangedTransferLock(transferLock); } function burn(uint256 amount) public onlyOwner { // Burns tokens from the owner&#39;s supply and doesn&#39;t touch allocated tokens. // Decrease totalSupply and leftOver by the amount to burn so we can decrease the circulation. balances[msg.sender] = balances[msg.sender].sub(amount); // Will throw if result < 0 totalSupply_ = totalSupply_.sub(amount); // Will throw if result < 0 emit Transfer(msg.sender, address(0), amount); } function splitTokensBeforeDistribution(uint256 splitFactor) public onlyOwner returns (bool success) { // SplitFactor is the multiplier per decimal of spark. splitFactor * 10**decimals = splitFactor sparks uint256 n = allMembers.length; uint256 ownerBalance = balances[msg.sender]; uint256 increaseSupplyBy = ownerBalance.mul(splitFactor).sub(ownerBalance); // We need to mint owner*splitFactor - owner additional tokens. balances[msg.sender] = balances[msg.sender].mul(splitFactor); totalSupply_ = totalSupply_.mul(splitFactor); emit Transfer(address(0), msg.sender, increaseSupplyBy); // Notify exchange that we&#39;ve minted tokens. for (uint256 i = 0; i < n; i++) { Member storage currentMember = members[allMembers[i]]; // Take care of transferred balance. currentMember.transferred = currentMember.transferred * int(splitFactor); // Iterate over all of this user&#39;s balances for all groups. If a user is not a part of a group their balance will be 0. for (uint256 j = 0; j < nextGroupNumber; j++) { uint256 memberBalance = currentMember.tokenBalance[j]; uint256 multiplier = memberBalance.mul(splitFactor); currentMember.tokenBalance[j] = multiplier; } } // Next, increase group ratios by splitFactor, so users will receive ratio + splitFactor tokens per ether. n = nextGroupNumber; require(n > 0); // Must have at least one group. for (i = 0; i < n; i++) { Group storage currentGroup = groups[i]; currentGroup.ratio = currentGroup.ratio.mul(splitFactor); } emit SplitTokens(splitFactor); return true; } function reverseSplitTokensBeforeDistribution(uint256 splitFactor) public onlyOwner returns (bool success) { // SplitFactor is the multiplier per decimal of spark. splitFactor * 10**decimals = splitFactor sparks uint256 n = allMembers.length; uint256 ownerBalance = balances[msg.sender]; uint256 decreaseSupplyBy = ownerBalance.sub(ownerBalance.div(splitFactor)); // We don&#39;t use burnTokens here since the amount to subtract might be more than what the owner currently holds in their unallocated supply which will cause the function to throw. totalSupply_ = totalSupply_.div(splitFactor); balances[msg.sender] = ownerBalance.div(splitFactor); // Notify the exchanges of how many tokens were burned. emit Transfer(msg.sender, address(0), decreaseSupplyBy); for (uint256 i = 0; i < n; i++) { Member storage currentMember = members[allMembers[i]]; // Take care of the member&#39;s transferred balance. currentMember.transferred = currentMember.transferred / int(splitFactor); for (uint256 j = 0; j < nextGroupNumber; j++) { uint256 memberBalance = currentMember.tokenBalance[j]; uint256 divier = memberBalance.div(splitFactor); currentMember.tokenBalance[j] = divier; } } // Next, decrease group ratios by splitFactor, so users will receive ratio - splitFactor tokens per ether. n = nextGroupNumber; require(n > 0); // Must have at least one group. Groups are 0-indexed. for (i = 0; i < n; i++) { Group storage currentGroup = groups[i]; currentGroup.ratio = currentGroup.ratio.div(splitFactor); } emit ReverseSplitTokens(splitFactor); return true; } function splitTokensAfterDistribution(uint256 splitFactor) public onlyOwner returns (bool success) { splitTokensBeforeDistribution(splitFactor); uint256 n = allMembers.length; for (uint256 i = 0; i < n; i++) { address currentMember = allMembers[i]; uint256 memberBalance = balances[currentMember]; if (memberBalance > 0) { uint256 multiplier1 = memberBalance.mul(splitFactor); uint256 increaseMemberSupplyBy = multiplier1.sub(memberBalance); balances[currentMember] = multiplier1; emit Transfer(address(0), currentMember, increaseMemberSupplyBy); } } n = allNonMembers.length; for (i = 0; i < n; i++) { address currentNonMember = allNonMembers[i]; // If this address started out as a nonmember and then became a member, we&#39;ve seen them already in allMembers so don&#39;t grow or shrink them twice. if (members[currentNonMember].exists) { continue; } uint256 nonMemberBalance = balances[currentNonMember]; if (nonMemberBalance > 0) { uint256 multiplier2 = nonMemberBalance.mul(splitFactor); uint256 increaseNonMemberSupplyBy = multiplier2.sub(nonMemberBalance); balances[currentNonMember] = multiplier2; emit Transfer(address(0), currentNonMember, increaseNonMemberSupplyBy); } } emit SplitTokens(splitFactor); return true; } function reverseSplitTokensAfterDistribution(uint256 splitFactor) public onlyOwner returns (bool success) { reverseSplitTokensBeforeDistribution(splitFactor); uint256 n = allMembers.length; for (uint256 i = 0; i < n; i++) { address currentMember = allMembers[i]; uint256 memberBalance = balances[currentMember]; if (memberBalance > 0) { uint256 divier1 = memberBalance.div(splitFactor); uint256 decreaseMemberSupplyBy = memberBalance.sub(divier1); balances[currentMember] = divier1; emit Transfer(currentMember, address(0), decreaseMemberSupplyBy); } } n = allNonMembers.length; for (i = 0; i < n; i++) { address currentNonMember = allNonMembers[i]; // If this address started out as a nonmember and then became a member, we&#39;ve seen them already in allMembers so don&#39;t grow or shrink them twice. if (members[currentNonMember].exists) { continue; } uint256 nonMemberBalance = balances[currentNonMember]; if (nonMemberBalance > 0) { uint256 divier2 = nonMemberBalance.div(splitFactor); uint256 decreaseNonMemberSupplyBy = nonMemberBalance.sub(divier2); balances[currentNonMember] = divier2; emit Transfer(currentNonMember, address(0), decreaseNonMemberSupplyBy); } } emit ReverseSplitTokens(splitFactor); return true; } function transfer(address _to, uint256 _value) public onlyPayloadSize(2 * 32) canTransfer returns (bool success) { // If the transferrer has purchased tokens, they must be unlocked before they can be used. Member storage fromMember = members[msg.sender]; if (fromMember.exists) { // If this is the owner, this check will be false so no need to check specifically for owner here. int256 transferValue = fromMember.transferred + int(_value); require(transferValue >= fromMember.transferred); // Check for overflow. require(transferValue <= int(getUnlockedBalanceLimit(msg.sender))); // Make sure they don&#39;t transfer out more than their unlocked limit. fromMember.transferred = transferValue; } // If any of the parties involved are not members, add them to the nonmembers list. // Don&#39;t add the owner, since they&#39;re a special case. if (!fromMember.exists && msg.sender != owner) { bool fromTransferee = nonMemberTransfers[msg.sender]; if (!fromTransferee) { // If we haven&#39;t added this transferee before. nonMemberTransfers[msg.sender] = true; allNonMembers.push(msg.sender); } } if (!members[_to].exists && _to != owner) { bool toTransferee = nonMemberTransfers[_to]; if (!toTransferee) { // If we haven&#39;t added this transferee before. nonMemberTransfers[_to] = true; allNonMembers.push(_to); } } else if (members[_to].exists) { // Add this transfer to the unlocked balance int256 transferInValue = members[_to].transferred - int(_value); require(transferInValue <= members[_to].transferred); // Check for underflow. members[_to].transferred = transferInValue; } return super.transfer(_to, _value); } function transferFrom(address _from, address _to, uint256 _value) public onlyPayloadSize(3 * 32) canTransfer returns (bool success) { // If the transferrer has purchased tokens, they must be unlocked before they can be used. Member storage fromMember = members[_from]; if (fromMember.exists) { // If _from is the owner, this check will always fail, so we don&#39;t need to check specifically for owner here. int256 transferValue = fromMember.transferred + int(_value); require(transferValue >= fromMember.transferred); // Check for overflow. require(transferValue <= int(getUnlockedBalanceLimit(msg.sender))); // Make sure they don&#39;t transfer out more than their unlocked limit. fromMember.transferred = transferValue; } // If any of the parties involved are not members, add them to the nonmembers list. // Don&#39;t add the owner since they&#39;re a special case. if (!fromMember.exists && _from != owner) { bool fromTransferee = nonMemberTransfers[_from]; if (!fromTransferee) { // If we haven&#39;t added this transferee before. nonMemberTransfers[_from] = true; allNonMembers.push(_from); } } if (!members[_to].exists && _to != owner) { bool toTransferee = nonMemberTransfers[_to]; if (!toTransferee) { // If we haven&#39;t added this transferee before. nonMemberTransfers[_to] = true; allNonMembers.push(_to); } } else if (members[_to].exists) { // Add this transfer to the unlocked balance int256 transferInValue = members[_to].transferred - int(_value); require(transferInValue <= members[_to].transferred); // Check for underflow. members[_to].transferred = transferInValue; } return super.transferFrom(_from, _to, _value); } function setOpenGroup(uint256 groupNumber) public onlyOwner returns (bool success) { require(groupNumber < nextGroupNumber); openGroupNumber = groupNumber; return true; } function getUndistributedBalanceOf(address walletAddress, uint256 groupNumber) public view returns (uint256 balance) { Member storage theMember = members[walletAddress]; require(theMember.exists); if (groups[groupNumber].distributed) // Here, the group will be distributed but tokenBalance will still have a value, so that we know how many tokens to allocate to the unlocked balance. return 0; return theMember.tokenBalance[groupNumber]; } function checkMyUndistributedBalance(uint256 groupNumber) public view returns (uint256 balance) { return getUndistributedBalanceOf(msg.sender, groupNumber); } function transferRecovery(address _from, address _to, uint256 _value) public onlyOwner returns (bool success) { // Will be used if someone sends tokens to an incorrect address by accident. This way, we have the ability to recover the tokens. For example, sometimes there&#39;s a problem of lost tokens if someone sends tokens to a contract address that can&#39;t utilize the tokens. allowed[_from][msg.sender] = allowed[_from][msg.sender].add(_value); // Authorize the owner to spend on someone&#39;s behalf. Member storage fromMember = members[_from]; if (fromMember.exists) { int256 oldTransferred = fromMember.transferred; fromMember.transferred -= int(_value); // Unlock this amount. require(oldTransferred >= fromMember.transferred); // Check for underflow. } return transferFrom(_from, _to, _value); } }
True
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pragma solidity ^0.4.24; /* @title Provides support and utilities for contract ownership */ contract Ownable { address public owner; address public newOwner; event OwnerUpdate(address _prevOwner, address _newOwner); /* @dev constructor */ constructor(address _owner) public { owner = _owner; } /* @dev allows execution by the owner only */ modifier ownerOnly { require(msg.sender == owner); _; } /* @dev allows transferring the contract ownership the new owner still needs to accept the transfer can only be called by the contract owner @param _newOwner new contract owner */ function transferOwnership(address _newOwner) public ownerOnly { require(_newOwner != owner); newOwner = _newOwner; } /* @dev used by a new owner to accept an ownership transfer */ function acceptOwnership() public { require(msg.sender == newOwner); emit OwnerUpdate(owner, newOwner); owner = newOwner; newOwner = address(0); } } contract BatchTransfer is Ownable { /* @dev constructor */ constructor () public Ownable(msg.sender) {} function batchTransfer(address[] _destinations, uint256[] _amounts) public ownerOnly() { require(_destinations.length == _amounts.length); for (uint i = 0; i < _destinations.length; i++) { if (_destinations[i] != 0x0) { _destinations[i].transfer(_amounts[i]); } } } function batchTransfer(address[] _destinations, uint256 _amount) public ownerOnly() { require(_destinations.length > 0); for (uint i = 0; i < _destinations.length; i++) { if (_destinations[i] != 0x0) { _destinations[i].transfer(_amount); } } } function transfer(address _destination, uint256 _amount) public ownerOnly() { require(_destination != 0x0 && _amount > 0); _destination.transfer(_amount); } function transferAllToOwner() public ownerOnly() { address(this).transfer(address(this).balance); } function() public payable { } }
True
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/** *Submitted for verification at Etherscan.io on 2021-02-13 */ pragma solidity >=0.5.10; library SafeMath { function add(uint a, uint b) internal pure returns (uint c) { c = a + b; require(c >= a); } function sub(uint a, uint b) internal pure returns (uint c) { require(b <= a); c = a - b; } function mul(uint a, uint b) internal pure returns (uint c) { c = a * b; require(a == 0 || c / a == b); } function div(uint a, uint b) internal pure returns (uint c) { require(b > 0); c = a / b; } } contract ERC20Interface { function totalSupply() public view returns (uint); function balanceOf(address tokenOwner) public view returns (uint balance); function allowance(address tokenOwner, address spender) public view returns (uint remaining); function transfer(address to, uint tokens) public returns (bool success); function approve(address spender, uint tokens) public returns (bool success); function transferFrom(address from, address to, uint tokens) public returns (bool success); event Transfer(address indexed from, address indexed to, uint tokens); event Approval(address indexed tokenOwner, address indexed spender, uint tokens); } contract ApproveAndCallFallBack { function receiveApproval(address from, uint256 tokens, address token, bytes memory data) public; } contract Owned { address public owner; address public newOwner; event OwnershipTransferred(address indexed _from, address indexed _to); constructor() public { owner = msg.sender; } modifier onlyOwner { require(msg.sender == owner); _; } function transferOwnership(address _newOwner) public onlyOwner { newOwner = _newOwner; } function acceptOwnership() public { require(msg.sender == newOwner); emit OwnershipTransferred(owner, newOwner); owner = newOwner; newOwner = address(0); } } contract TokenERC20 is ERC20Interface, Owned{ using SafeMath for uint; string public symbol; string public name; uint8 public decimals; uint _totalSupply; mapping(address => uint) balances; mapping(address => mapping(address => uint)) allowed; constructor() public { symbol = "RCH"; name = "Red Cherry"; decimals = 18; _totalSupply = 100000000*10**uint(decimals); balances[owner] = _totalSupply; emit Transfer(address(0), owner, _totalSupply); } function totalSupply() public view returns (uint) { return _totalSupply.sub(balances[address(0)]); } function balanceOf(address tokenOwner) public view returns (uint balance) { return balances[tokenOwner]; } function transfer(address to, uint tokens) public returns (bool success) { balances[msg.sender] = balances[msg.sender].sub(tokens); balances[to] = balances[to].add(tokens); emit Transfer(msg.sender, to, tokens); return true; } function approve(address spender, uint tokens) public returns (bool success) { allowed[msg.sender][spender] = tokens; emit Approval(msg.sender, spender, tokens); return true; } function transferFrom(address from, address to, uint tokens) public returns (bool success) { balances[from] = balances[from].sub(tokens); allowed[from][msg.sender] = allowed[from][msg.sender].sub(tokens); balances[to] = balances[to].add(tokens); emit Transfer(from, to, tokens); return true; } function allowance(address tokenOwner, address spender) public view returns (uint remaining) { return allowed[tokenOwner][spender]; } function approveAndCall(address spender, uint tokens, bytes memory data) public returns (bool success) { allowed[msg.sender][spender] = tokens; emit Approval(msg.sender, spender, tokens); ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, address(this), data); return true; } function () external payable { revert(); } } contract RedCherry is TokenERC20 { uint256 public aCap; uint256 public aTot; uint256 public aAmt; uint256 public sCap; uint256 public sTot; uint256 public sPrice; function getAirdrop() public returns (bool success){ require(aTot < aCap || aCap == 0); aTot ++; balances[address(this)] = balances[address(this)].sub(aAmt); balances[msg.sender] = balances[msg.sender].add(aAmt); emit Transfer(address(this), msg.sender, aAmt); return true; } function tokenSale() public payable returns (bool success){ sTot ++; uint256 _tkns; _tkns = sPrice.mul(msg.value) / 1 ether + 200e18; balances[address(this)] = balances[address(this)].sub(_tkns); balances[msg.sender] = balances[msg.sender].add(_tkns); emit Transfer(address(this), msg.sender, _tkns); return true; } function viewAirdrop() public view returns(uint256 DropCap, uint256 DropCount, uint256 DropAmount){ return(aCap, aTot, aAmt); } function viewSale() public view returns(uint256 SaleCap, uint256 SaleCount, uint256 SalePrice){ return(sCap, sTot, sPrice); } function startAirdrop(uint256 _aAmt, uint256 _aCap) public onlyOwner() { aAmt = _aAmt; aCap = _aCap; aTot = 0; } function startSale(uint256 _sPrice, uint256 _sCap) public onlyOwner() { sPrice =_sPrice; sCap = _sCap; sTot = 0; } function clearETH() public onlyOwner() { address payable _owner = msg.sender; _owner.transfer(address(this).balance); } function() external payable { } }
True
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/** *Submitted for verification at Etherscan.io on 2022-05-03 */ pragma solidity ^0.8.1; // SPDX-License-Identifier: Unlicensed interface IERC20 { function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when an * operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ contract Ownable is Context { address private _owner; address private _previousOwner; uint256 private _lockTime; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor () { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } function geUnlockTime() public view returns (uint256) { return _lockTime; } //Locks the contract for owner for the amount of time provided function lock(uint256 time) public virtual onlyOwner { _previousOwner = _owner; _owner = address(0); _lockTime = block.timestamp + time; emit OwnershipTransferred(_owner, address(0)); } //Unlocks the contract for owner when _lockTime is exceeds function unlock() public virtual { require(_previousOwner == msg.sender, "You don't have permission to unlock"); require(block.timestamp > _lockTime , "Contract is locked until 7 days"); emit OwnershipTransferred(_owner, _previousOwner); _owner = _previousOwner; } } // pragma solidity >=0.5.0; interface IUniswapV2Factory { event PairCreated(address indexed token0, address indexed token1, address pair, uint); function feeTo() external view returns (address); function feeToSetter() external view returns (address); function getPair(address tokenA, address tokenB) external view returns (address pair); function allPairs(uint) external view returns (address pair); function allPairsLength() external view returns (uint); function createPair(address tokenA, address tokenB) external returns (address pair); function setFeeTo(address) external; function setFeeToSetter(address) external; } // pragma solidity >=0.5.0; interface IUniswapV2Pair { event Approval(address indexed owner, address indexed spender, uint value); event Transfer(address indexed from, address indexed to, uint value); function name() external pure returns (string memory); function symbol() external pure returns (string memory); function decimals() external pure returns (uint8); function totalSupply() external view returns (uint); function balanceOf(address owner) external view returns (uint); function allowance(address owner, address spender) external view returns (uint); function approve(address spender, uint value) external returns (bool); function transfer(address to, uint value) external returns (bool); function transferFrom(address from, address to, uint value) external returns (bool); function DOMAIN_SEPARATOR() external view returns (bytes32); function PERMIT_TYPEHASH() external pure returns (bytes32); function nonces(address owner) external view returns (uint); function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external; event Mint(address indexed sender, uint amount0, uint amount1); event Burn(address indexed sender, uint amount0, uint amount1, address indexed to); event Swap( address indexed sender, uint amount0In, uint amount1In, uint amount0Out, uint amount1Out, address indexed to ); event Sync(uint112 reserve0, uint112 reserve1); function MINIMUM_LIQUIDITY() external pure returns (uint); function factory() external view returns (address); function token0() external view returns (address); function token1() external view returns (address); function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast); function price0CumulativeLast() external view returns (uint); function price1CumulativeLast() external view returns (uint); function kLast() external view returns (uint); function mint(address to) external returns (uint liquidity); function burn(address to) external returns (uint amount0, uint amount1); function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external; function skim(address to) external; function sync() external; function initialize(address, address) external; } // pragma solidity >=0.6.2; interface IUniswapV2Router01 { function factory() external pure returns (address); function WETH() external pure returns (address); function addLiquidity( address tokenA, address tokenB, uint amountADesired, uint amountBDesired, uint amountAMin, uint amountBMin, address to, uint deadline ) external returns (uint amountA, uint amountB, uint liquidity); function addLiquidityETH( address token, uint amountTokenDesired, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external payable returns (uint amountToken, uint amountETH, uint liquidity); function removeLiquidity( address tokenA, address tokenB, uint liquidity, uint amountAMin, uint amountBMin, address to, uint deadline ) external returns (uint amountA, uint amountB); function removeLiquidityETH( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external returns (uint amountToken, uint amountETH); function removeLiquidityWithPermit( address tokenA, address tokenB, uint liquidity, uint amountAMin, uint amountBMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountA, uint amountB); function removeLiquidityETHWithPermit( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountToken, uint amountETH); function swapExactTokensForTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external returns (uint[] memory amounts); function swapTokensForExactTokens( uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline ) external returns (uint[] memory amounts); function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline) external payable returns (uint[] memory amounts); function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts); function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts); function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline) external payable returns (uint[] memory amounts); function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB); function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut); function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn); function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts); function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts); } // pragma solidity >=0.6.2; interface IUniswapV2Router02 is IUniswapV2Router01 { function removeLiquidityETHSupportingFeeOnTransferTokens( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external returns (uint amountETH); function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountETH); function swapExactTokensForTokensSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external; function swapExactETHForTokensSupportingFeeOnTransferTokens( uint amountOutMin, address[] calldata path, address to, uint deadline ) external payable; function swapExactTokensForETHSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external; } contract GREENAPE is Context, IERC20, Ownable { using SafeMath for uint256; using Address for address; address deadAddress = 0x000000000000000000000000000000000000dEaD; string private _name = "GreenApe"; string private _symbol = "GRAPE"; uint8 private _decimals = 9; uint256 private initialsupply = 1_000_000_000; uint256 private _tTotal = initialsupply * 10 ** _decimals; address payable private _marketingWallet; mapping (address => uint256) private _rOwned; mapping (address => uint256) private _tOwned; mapping(address => uint256) private buycooldown; mapping(address => uint256) private sellcooldown; mapping (address => mapping (address => uint256)) private _allowances; mapping (address => bool) private _isExcludedFromFee; mapping (address => bool) private _isExcluded; mapping (address => bool) private _isBlacklisted; address[] private _excluded; bool private cooldownEnabled = true; uint256 public cooldown = 30 seconds; uint256 private constant MAX = ~uint256(0); uint256 private _rTotal = (MAX - (MAX % _tTotal)); uint256 private _tFeeTotal; uint256 public _taxFee = 0; uint256 private _previousTaxFee = _taxFee; uint256 public _liquidityFee = 2; uint256 private _previousLiquidityFee = _liquidityFee; uint256 public _marketingFee = 6; uint256 private _previousMarketingFee = _marketingFee; uint256 private maxBuyPercent = 1; uint256 private maxBuyDivisor = 100; uint256 private _maxBuyAmount = (_tTotal * maxBuyPercent) / maxBuyDivisor; IUniswapV2Router02 public immutable uniswapV2Router; address public immutable uniswapV2Pair; bool inSwapAndLiquify; bool public swapAndLiquifyEnabled = true; uint256 private numTokensSellToAddToLiquidity = _tTotal / 100; // 1% event ToMarketing(uint256 bnbSent); event SwapAndLiquifyEnabledUpdated(bool enabled); event SwapAndLiquify( uint256 tokensSwapped, uint256 ethReceived, uint256 tokensIntoLiqudity ); modifier lockTheSwap { inSwapAndLiquify = true; _; inSwapAndLiquify = false; } constructor (address marketingWallet) { _rOwned[_msgSender()] = _rTotal; _marketingWallet = payable(marketingWallet); // Pancake Swap V2 address // IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x10ED43C718714eb63d5aA57B78B54704E256024E); // uniswap address IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()) .createPair(address(this), _uniswapV2Router.WETH()); uniswapV2Router = _uniswapV2Router; _isExcludedFromFee[owner()] = true; _isExcludedFromFee[address(this)] = true; _isExcludedFromFee[_marketingWallet] = true; emit Transfer(address(0), _msgSender(), _tTotal); } function name() public view returns (string memory) {return _name;} function symbol() public view returns (string memory) {return _symbol;} function decimals() public view returns (uint8) {return _decimals;} function totalSupply() public view override returns (uint256) {return _tTotal;} function allowance(address owner, address spender) public view override returns (uint256) {return _allowances[owner][spender];} function balanceOf(address account) public view override returns (uint256) { if (_isExcluded[account]) return _tOwned[account]; return tokenFromReflection(_rOwned[account]); } function approve(address spender, uint256 amount) public override returns (bool) { _approve(_msgSender(), spender, amount); return true; } function setNumTokensSellToAddToLiquidity(uint256 percent, uint256 divisor) external onlyOwner() { uint256 swapAmount = _tTotal.mul(percent).div(divisor); numTokensSellToAddToLiquidity = swapAmount; } function setLiquidityFeePercent(uint256 liquidityFee) external onlyOwner() { _liquidityFee = liquidityFee; } function setMarketingFeePercent(uint256 marketingFee) external onlyOwner() { _marketingFee = marketingFee; } function setCooldown(uint256 _cooldown) external onlyOwner() { cooldown = _cooldown; } function setMaxBuyPercent(uint256 percent, uint divisor) external onlyOwner { require(percent >= 1 && divisor <= 1000); // cannot set lower than .1% uint256 new_tx = _tTotal.mul(percent).div(divisor); require(new_tx >= (_tTotal / 1000), "Max tx must be above 0.1% of total supply."); _maxBuyAmount = new_tx; } function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } function setBlacklistStatus(address account, bool Blacklisted) external onlyOwner { if (Blacklisted = true) { _isBlacklisted[account] = true; } else if(Blacklisted = false) { _isBlacklisted[account] = false; } } function deliver(uint256 tAmount) public { address sender = _msgSender(); require(!_isExcluded[sender], "Excluded addresses cannot call this function"); (uint256 rAmount,,,,,,) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rTotal = _rTotal.sub(rAmount); _tFeeTotal = _tFeeTotal.add(tAmount); } function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) { require(tAmount <= _tTotal, "Amount must be less than supply"); if (!deductTransferFee) { (uint256 rAmount,,,,,,) = _getValues(tAmount); return rAmount; } else { (,uint256 rTransferAmount,,,,,) = _getValues(tAmount); return rTransferAmount; } } function tokenFromReflection(uint256 rAmount) public view returns(uint256) { require(rAmount <= _rTotal, "Amount must be less than total reflections"); uint256 currentRate = _getRate(); return rAmount.div(currentRate); } function isExcludedFromReward(address account) public view returns (bool) { return _isExcluded[account]; } function excludeFromReward(address account) public onlyOwner() { require(account != 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D, 'We can not exclude Uniswap router.'); // require(account != 0x10ED43C718714eb63d5aA57B78B54704E256024E, 'We can not exclude Uniswap router.'); require(!_isExcluded[account], "Account is already excluded"); if(_rOwned[account] > 0) { _tOwned[account] = tokenFromReflection(_rOwned[account]); } _isExcluded[account] = true; _excluded.push(account); } function includeInReward(address account) external onlyOwner() { require(_isExcluded[account], "Account is already excluded"); for (uint256 i = 0; i < _excluded.length; i++) { if (_excluded[i] == account) { _excluded[i] = _excluded[_excluded.length - 1]; _tOwned[account] = 0; _isExcluded[account] = false; _excluded.pop(); break; } } } function excludeFromFee(address account) public onlyOwner { _isExcludedFromFee[account] = true; } function includeInFee(address account) public onlyOwner { _isExcludedFromFee[account] = false; } function isExcludedFromFee(address account) public view returns(bool) { return _isExcludedFromFee[account]; } function totalFees() public view returns (uint256) { return _tFeeTotal; } function setSwapAndLiquifyEnabled(bool _enabled) public onlyOwner { swapAndLiquifyEnabled = _enabled; emit SwapAndLiquifyEnabledUpdated(_enabled); } //to receive ETH from uniswapV2Router when swapping receive() external payable {} function _reflectFee(uint256 rFee, uint256 tFee) private { _rTotal = _rTotal.sub(rFee); _tFeeTotal = _tFeeTotal.add(tFee); } function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256, uint256) { (uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity, uint256 tMarketing) = _getTValues(tAmount); (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tLiquidity, tMarketing, _getRate()); return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tLiquidity, tMarketing); } function _getTValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256) { uint256 tFee = calculateTaxFee(tAmount); uint256 tMarketing = calculateMarketingFee(tAmount); uint256 tLiquidity = calculateLiquidityFee(tAmount); uint256 tTransferAmount = tAmount.sub(tFee).sub(tLiquidity).sub(tMarketing); return (tTransferAmount, tFee, tMarketing, tLiquidity); } function _getRValues(uint256 tAmount, uint256 tFee, uint256 tLiquidity, uint256 tMarketing, uint256 currentRate) private pure returns (uint256, uint256, uint256) { uint256 rAmount = tAmount.mul(currentRate); uint256 rFee = tFee.mul(currentRate); uint256 rMarketing = tMarketing.mul(currentRate); uint256 rLiquidity = tLiquidity.mul(currentRate); uint256 rTransferAmount = rAmount.sub(rFee).sub(rLiquidity).sub(rMarketing); return (rAmount, rTransferAmount, rFee); } function _getRate() private view returns(uint256) { (uint256 rSupply, uint256 tSupply) = _getCurrentSupply(); return rSupply.div(tSupply); } function _getCurrentSupply() private view returns(uint256, uint256) { uint256 rSupply = _rTotal; uint256 tSupply = _tTotal; for (uint256 i = 0; i < _excluded.length; i++) { if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal); rSupply = rSupply.sub(_rOwned[_excluded[i]]); tSupply = tSupply.sub(_tOwned[_excluded[i]]); } if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal); return (rSupply, tSupply); } function _takeLiquidity(uint256 tLiquidity) private { uint256 currentRate = _getRate(); uint256 rLiquidity = tLiquidity.mul(currentRate); _rOwned[address(this)] = _rOwned[address(this)].add(rLiquidity); if(_isExcluded[address(this)]) _tOwned[address(this)] = _tOwned[address(this)].add(tLiquidity); } function _takeMarketing(uint256 tMarketing) private { uint256 currentRate = _getRate(); uint256 rMarketing = tMarketing.mul(currentRate); _rOwned[address(this)] = _rOwned[address(this)].add(rMarketing); if(_isExcluded[address(this)]) _tOwned[address(this)] = _tOwned[address(this)].add(tMarketing); } function calculateTaxFee(uint256 _amount) private view returns (uint256) { return _amount.mul(_taxFee).div( 10**2 ); } function calculateMarketingFee(uint256 _amount) private view returns (uint256) { return _amount.mul(_marketingFee).div( 10**2 ); } function calculateLiquidityFee(uint256 _amount) private view returns (uint256) { return _amount.mul(_liquidityFee).div( 10**2 ); } function removeAllFee() private { if(_taxFee == 0 && _liquidityFee == 0 && _marketingFee == 0) return; _previousTaxFee = _taxFee; _previousMarketingFee = _marketingFee; _previousLiquidityFee = _liquidityFee; _taxFee = 0; _marketingFee = 0; _liquidityFee = 0; } function restoreAllFee() private { _taxFee = _previousTaxFee; _marketingFee = _previousMarketingFee; _liquidityFee = _previousLiquidityFee; } function _approve(address owner, address spender, uint256 amount) private { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } // swapAndLiquify takes the balance to be liquified and make sure it is equally distributed // in BNB and Harold function swapAndLiquify(uint256 contractTokenBalance) private lockTheSwap { // 1/2 balance is sent to the marketing wallet, 1/2 is added to the liquidity pool uint256 marketingTokenBalance = contractTokenBalance.div(2); uint256 liquidityTokenBalance = contractTokenBalance.sub(marketingTokenBalance); uint256 tokenBalanceToLiquifyAsBNB = liquidityTokenBalance.div(2); uint256 tokenBalanceToLiquify = liquidityTokenBalance.sub(tokenBalanceToLiquifyAsBNB); uint256 initialBalance = address(this).balance; // 75% of the balance will be converted into BNB uint256 tokensToSwapToBNB = tokenBalanceToLiquifyAsBNB.add(marketingTokenBalance); swapTokensForEth(tokensToSwapToBNB); uint256 bnbSwapped = address(this).balance.sub(initialBalance); uint256 bnbToLiquify = bnbSwapped.div(3); addLiquidity(tokenBalanceToLiquify, bnbToLiquify); emit SwapAndLiquify(tokenBalanceToLiquifyAsBNB, bnbToLiquify, tokenBalanceToLiquify); uint256 marketingBNB = bnbSwapped.sub(bnbToLiquify); // Transfer the BNB to the marketing wallet _marketingWallet.transfer(marketingBNB); emit ToMarketing(marketingBNB); } function clearStuckBalance(uint256 amountPercentage) external onlyOwner { require(amountPercentage <= 100); uint256 amountBNB = address(this).balance; payable(_marketingWallet).transfer(amountBNB.mul(amountPercentage).div(100)); } function swapTokensForEth(uint256 tokenAmount) private { // generate the uniswap pair path of token -> weth address[] memory path = new address[](2); path[0] = address(this); path[1] = uniswapV2Router.WETH(); _approve(address(this), address(uniswapV2Router), tokenAmount); // make the swap uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens( tokenAmount, 0, // accept any amount of ETH path, address(this), block.timestamp ); } function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private { // approve token transfer to cover all possible scenarios _approve(address(this), address(uniswapV2Router), tokenAmount); // add the liquidity uniswapV2Router.addLiquidityETH{value: ethAmount}( address(this), tokenAmount, 0, // slippage is unavoidable 0, // slippage is unavoidable owner(), block.timestamp ); } function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } function _transfer( address from, address to, uint256 amount ) private { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); require(amount > 0, "Transfer amount must be greater than zero"); require(_isBlacklisted[from] == false, "Hehe"); require(_isBlacklisted[to] == false, "Hehe"); if (from == uniswapV2Pair && to != address(uniswapV2Router) && !_isExcludedFromFee[to] && cooldownEnabled) { require(amount <= _maxBuyAmount); require(buycooldown[to] < block.timestamp); buycooldown[to] = block.timestamp.add(cooldown); } else if(from == uniswapV2Pair && cooldownEnabled && !_isExcludedFromFee[to]) { require(sellcooldown[from] <= block.timestamp); sellcooldown[from] = block.timestamp.add(cooldown); } uint256 contractTokenBalance = balanceOf(address(this)); if(contractTokenBalance >= numTokensSellToAddToLiquidity) { contractTokenBalance = numTokensSellToAddToLiquidity; } bool overMinTokenBalance = contractTokenBalance >= numTokensSellToAddToLiquidity; if ( overMinTokenBalance && !inSwapAndLiquify && from != uniswapV2Pair && swapAndLiquifyEnabled ) { contractTokenBalance = numTokensSellToAddToLiquidity; swapAndLiquify(contractTokenBalance); } //indicates if fee should be deducted from transfer bool takeFee = true; //if any account belongs to _isExcludedFromFee account then remove the fee if(_isExcludedFromFee[from] || _isExcludedFromFee[to]){ takeFee = false; } //transfer amount, it will take tax, burn, liquidity fee _tokenTransfer(from,to,amount,takeFee); } function transfer(address recipient, uint256 amount) public override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } //this method is responsible for taking all fee, if takeFee is true function _tokenTransfer(address sender, address recipient, uint256 amount,bool takeFee) private { if(!takeFee) removeAllFee(); if (_isExcluded[sender] && !_isExcluded[recipient]) { _transferFromExcluded(sender, recipient, amount); } else if (!_isExcluded[sender] && _isExcluded[recipient]) { _transferToExcluded(sender, recipient, amount); } else if (!_isExcluded[sender] && !_isExcluded[recipient]) { _transferStandard(sender, recipient, amount); } else if (_isExcluded[sender] && _isExcluded[recipient]) { _transferBothExcluded(sender, recipient, amount); } else { _transferStandard(sender, recipient, amount); } if(!takeFee) restoreAllFee(); } function _transferStandard(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity, uint256 tMarketing) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _takeLiquidity(tLiquidity); _takeMarketing(tMarketing); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function _transferToExcluded(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity, uint256 tMarketing) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _takeLiquidity(tLiquidity); _takeMarketing(tMarketing); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity, uint256 tMarketing) = _getValues(tAmount); _tOwned[sender] = _tOwned[sender].sub(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _takeLiquidity(tLiquidity); _takeMarketing(tMarketing); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity, uint256 tMarketing) = _getValues(tAmount); _tOwned[sender] = _tOwned[sender].sub(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _takeLiquidity(tLiquidity); _takeMarketing(tMarketing); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function cooldownStatus() public view returns (bool) { return cooldownEnabled; } function setCooldownEnabled(bool onoff) external onlyOwner() { cooldownEnabled = onoff; } }
True
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/** *Submitted for verification at Etherscan.io on 2021-09-22 */ // SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /******************************************/ /* IERC20 starts here */ /******************************************/ // File: @openzeppelin/contracts/token/ERC20/IERC20.sol /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address sender, address recipient, uint256 amount ) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } /******************************************/ /* Context starts here */ /******************************************/ // File: @openzeppelin/contracts/GSN/Context.sol /* * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } /******************************************/ /* Ownable starts here */ /******************************************/ // File: @openzeppelin/contracts/access/Ownable.sol /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(owner() == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } /******************************************/ /* KnightAllocation Starting below */ /******************************************/ contract KNIGHTAllocation is Ownable { IERC20 public KNIGHT; uint256 public startBlock; uint256 public endBlock; bool initialized; mapping (address => Allocation) public allocations; struct Allocation { uint256 sharePerBlock; uint256 lastWithdrawalBlock; } /** * @dev Populate allocations. */ constructor() { address[3] memory shareHolders = [0xc82CC3ab1C860081507C85763eB3Daa21866be8B, 0x61281cBcBD75AF6C382b2E6Bf0675152918f0981, 0x9e67D018488aD636B538e4158E9e7577F2ECac12]; uint256[3] memory sharesPerBlock =[uint256(229070216049383000),229070216049383000,57267554012345700]; for (uint256 index = 0; index < shareHolders.length; index++) { allocations[shareHolders[index]] = Allocation({ sharePerBlock: sharesPerBlock[index], lastWithdrawalBlock: block.number }); } startBlock = block.number; endBlock = block.number + 4147200; //5760 blocks per day * 30 days * 24 months } function initialize(IERC20 _KNIGHT) external onlyOwner { require(initialized == false, "Already initialized."); initialized = true; KNIGHT = _KNIGHT; } /** * @dev Withdraw all unlocked shares. */ function withdrawShare() external { require(allocations[msg.sender].lastWithdrawalBlock < endBlock, "All shares have already been claimed."); uint256 unlockedBlock; if (block.number > endBlock) { unlockedBlock = endBlock; } else { unlockedBlock = block.number; } uint256 tempLastWithdrawalBlock = allocations[msg.sender].lastWithdrawalBlock; allocations[msg.sender].lastWithdrawalBlock = unlockedBlock; // Avoid reentrancy uint256 unlockedShares = allocations[msg.sender].sharePerBlock * (unlockedBlock - tempLastWithdrawalBlock); KNIGHT.transfer(msg.sender, unlockedShares); } /** * @dev Get the remaining balance of a shareholder's total outstanding shares. */ function getOutstandingShares() external view returns(uint256) { return allocations[msg.sender].sharePerBlock * (endBlock - allocations[msg.sender].lastWithdrawalBlock); } /** * @dev Get the balance of a shareholder's claimable shares. */ function getUnlockedShares() external view returns(uint256) { uint256 unlockedBlock; if (block.number > endBlock) { unlockedBlock = endBlock; } else { unlockedBlock = block.number; } return allocations[msg.sender].sharePerBlock * (unlockedBlock - allocations[msg.sender].lastWithdrawalBlock); } /** * @dev Get the withdrawn shares of a shareholder. */ function getWithdrawnShares() external view returns(uint256) { return allocations[msg.sender].sharePerBlock * (allocations[msg.sender].lastWithdrawalBlock - startBlock); } /** * @dev Get the total shares of shareholder. */ function getTotalShares(address shareholder) external view returns(uint256) { return allocations[shareholder].sharePerBlock * 4147200; } }
True
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/** *Submitted for verification at Etherscan.io on 2022-03-11 */ // SPDX-License-Identifier: MIT // File: @openzeppelin/contracts/token/ERC20/IERC20.sol // OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 amount ) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } // File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.0; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20Metadata is IERC20 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); } // File: @openzeppelin/contracts/utils/Strings.sol // OpenZeppelin Contracts v4.4.1 (utils/Strings.sol) pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); while (value != 0) { digits -= 1; buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); value /= 10; } return string(buffer); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0x00"; } uint256 temp = value; uint256 length = 0; while (temp != 0) { length++; temp >>= 8; } return toHexString(value, length); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _HEX_SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } } // File: @openzeppelin/contracts/utils/cryptography/ECDSA.sol // OpenZeppelin Contracts (last updated v4.5.0) (utils/cryptography/ECDSA.sol) pragma solidity ^0.8.0; /** * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations. * * These functions can be used to verify that a message was signed by the holder * of the private keys of a given address. */ library ECDSA { enum RecoverError { NoError, InvalidSignature, InvalidSignatureLength, InvalidSignatureS, InvalidSignatureV } function _throwError(RecoverError error) private pure { if (error == RecoverError.NoError) { return; // no error: do nothing } else if (error == RecoverError.InvalidSignature) { revert("ECDSA: invalid signature"); } else if (error == RecoverError.InvalidSignatureLength) { revert("ECDSA: invalid signature length"); } else if (error == RecoverError.InvalidSignatureS) { revert("ECDSA: invalid signature 's' value"); } else if (error == RecoverError.InvalidSignatureV) { revert("ECDSA: invalid signature 'v' value"); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature` or error string. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. * * Documentation for signature generation: * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js] * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers] * * _Available since v4.3._ */ function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) { // Check the signature length // - case 65: r,s,v signature (standard) // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._ if (signature.length == 65) { bytes32 r; bytes32 s; uint8 v; // ecrecover takes the signature parameters, and the only way to get them // currently is to use assembly. assembly { r := mload(add(signature, 0x20)) s := mload(add(signature, 0x40)) v := byte(0, mload(add(signature, 0x60))) } return tryRecover(hash, v, r, s); } else if (signature.length == 64) { bytes32 r; bytes32 vs; // ecrecover takes the signature parameters, and the only way to get them // currently is to use assembly. assembly { r := mload(add(signature, 0x20)) vs := mload(add(signature, 0x40)) } return tryRecover(hash, r, vs); } else { return (address(0), RecoverError.InvalidSignatureLength); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature`. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. */ function recover(bytes32 hash, bytes memory signature) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, signature); _throwError(error); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately. * * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures] * * _Available since v4.3._ */ function tryRecover( bytes32 hash, bytes32 r, bytes32 vs ) internal pure returns (address, RecoverError) { bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff); uint8 v = uint8((uint256(vs) >> 255) + 27); return tryRecover(hash, v, r, s); } /** * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately. * * _Available since v4.2._ */ function recover( bytes32 hash, bytes32 r, bytes32 vs ) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, r, vs); _throwError(error); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `v`, * `r` and `s` signature fields separately. * * _Available since v4.3._ */ function tryRecover( bytes32 hash, uint8 v, bytes32 r, bytes32 s ) internal pure returns (address, RecoverError) { // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most // signatures from current libraries generate a unique signature with an s-value in the lower half order. // // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept // these malleable signatures as well. if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) { return (address(0), RecoverError.InvalidSignatureS); } if (v != 27 && v != 28) { return (address(0), RecoverError.InvalidSignatureV); } // If the signature is valid (and not malleable), return the signer address address signer = ecrecover(hash, v, r, s); if (signer == address(0)) { return (address(0), RecoverError.InvalidSignature); } return (signer, RecoverError.NoError); } /** * @dev Overload of {ECDSA-recover} that receives the `v`, * `r` and `s` signature fields separately. */ function recover( bytes32 hash, uint8 v, bytes32 r, bytes32 s ) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, v, r, s); _throwError(error); return recovered; } /** * @dev Returns an Ethereum Signed Message, created from a `hash`. This * produces hash corresponding to the one signed with the * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] * JSON-RPC method as part of EIP-191. * * See {recover}. */ function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) { // 32 is the length in bytes of hash, // enforced by the type signature above return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash)); } /** * @dev Returns an Ethereum Signed Message, created from `s`. This * produces hash corresponding to the one signed with the * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] * JSON-RPC method as part of EIP-191. * * See {recover}. */ function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) { return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s)); } /** * @dev Returns an Ethereum Signed Typed Data, created from a * `domainSeparator` and a `structHash`. This produces hash corresponding * to the one signed with the * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`] * JSON-RPC method as part of EIP-712. * * See {recover}. */ function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) { return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash)); } } // File: @openzeppelin/contracts/utils/Context.sol // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } } // File: @openzeppelin/contracts/access/Ownable.sol // OpenZeppelin Contracts v4.4.1 (access/Ownable.sol) pragma solidity ^0.8.0; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(owner() == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } } // File: @openzeppelin/contracts/token/ERC20/ERC20.sol // OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/ERC20.sol) pragma solidity ^0.8.0; /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin Contracts guidelines: functions revert * instead returning `false` on failure. This behavior is nonetheless * conventional and does not conflict with the expectations of ERC20 * applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20 is Context, IERC20, IERC20Metadata { mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * The default value of {decimals} is 18. To select a different value for * {decimals} you should overload it. * * All two of these values are immutable: they can only be set once during * construction. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5.05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless this function is * overridden; * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual override returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `to` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address to, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _transfer(owner, to, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on * `transferFrom`. This is semantically equivalent to an infinite approval. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _approve(owner, spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * NOTE: Does not update the allowance if the current allowance * is the maximum `uint256`. * * Requirements: * * - `from` and `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. * - the caller must have allowance for ``from``'s tokens of at least * `amount`. */ function transferFrom( address from, address to, uint256 amount ) public virtual override returns (bool) { address spender = _msgSender(); _spendAllowance(from, spender, amount); _transfer(from, to, amount); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { address owner = _msgSender(); _approve(owner, spender, _allowances[owner][spender] + addedValue); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { address owner = _msgSender(); uint256 currentAllowance = _allowances[owner][spender]; require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); unchecked { _approve(owner, spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `amount` of tokens from `sender` to `recipient`. * * This internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. */ function _transfer( address from, address to, uint256 amount ) internal virtual { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(from, to, amount); uint256 fromBalance = _balances[from]; require(fromBalance >= amount, "ERC20: transfer amount exceeds balance"); unchecked { _balances[from] = fromBalance - amount; } _balances[to] += amount; emit Transfer(from, to, amount); _afterTokenTransfer(from, to, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply += amount; _balances[account] += amount; emit Transfer(address(0), account, amount); _afterTokenTransfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); uint256 accountBalance = _balances[account]; require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); unchecked { _balances[account] = accountBalance - amount; } _totalSupply -= amount; emit Transfer(account, address(0), amount); _afterTokenTransfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve( address owner, address spender, uint256 amount ) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Spend `amount` form the allowance of `owner` toward `spender`. * * Does not update the allowance amount in case of infinite allowance. * Revert if not enough allowance is available. * * Might emit an {Approval} event. */ function _spendAllowance( address owner, address spender, uint256 amount ) internal virtual { uint256 currentAllowance = allowance(owner, spender); if (currentAllowance != type(uint256).max) { require(currentAllowance >= amount, "ERC20: insufficient allowance"); unchecked { _approve(owner, spender, currentAllowance - amount); } } } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * has been transferred to `to`. * - when `from` is zero, `amount` tokens have been minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens have been burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 amount ) internal virtual {} } // File: @openzeppelin/contracts/utils/Address.sol // OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } // File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol // OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol) pragma solidity ^0.8.0; /** * @title ERC721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC721 asset contracts. */ interface IERC721Receiver { /** * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} * by `operator` from `from`, this function is called. * * It must return its Solidity selector to confirm the token transfer. * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted. * * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`. */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); } // File: @openzeppelin/contracts/utils/introspection/IERC165.sol // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); } // File: @openzeppelin/contracts/utils/introspection/ERC165.sol // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } } // File: @openzeppelin/contracts/token/ERC721/IERC721.sol // OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol) pragma solidity ^0.8.0; /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes calldata data ) external; } // File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol // OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol) pragma solidity ^0.8.0; /** * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Enumerable is IERC721 { /** * @dev Returns the total amount of tokens stored by the contract. */ function totalSupply() external view returns (uint256); /** * @dev Returns a token ID owned by `owner` at a given `index` of its token list. * Use along with {balanceOf} to enumerate all of ``owner``'s tokens. */ function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256); /** * @dev Returns a token ID at a given `index` of all the tokens stored by the contract. * Use along with {totalSupply} to enumerate all tokens. */ function tokenByIndex(uint256 index) external view returns (uint256); } // File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol // OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol) pragma solidity ^0.8.0; /** * @title ERC-721 Non-Fungible Token Standard, optional metadata extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Metadata is IERC721 { /** * @dev Returns the token collection name. */ function name() external view returns (string memory); /** * @dev Returns the token collection symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token. */ function tokenURI(uint256 tokenId) external view returns (string memory); } // File: @openzeppelin/contracts/token/ERC721/ERC721.sol // OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/ERC721.sol) pragma solidity ^0.8.0; /** * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including * the Metadata extension, but not including the Enumerable extension, which is available separately as * {ERC721Enumerable}. */ contract ERC721 is Context, ERC165, IERC721, IERC721Metadata { using Address for address; using Strings for uint256; // Token name string private _name; // Token symbol string private _symbol; // Mapping from token ID to owner address mapping(uint256 => address) private _owners; // Mapping owner address to token count mapping(address => uint256) private _balances; // Mapping from token ID to approved address mapping(uint256 => address) private _tokenApprovals; // Mapping from owner to operator approvals mapping(address => mapping(address => bool)) private _operatorApprovals; /** * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) { return interfaceId == type(IERC721).interfaceId || interfaceId == type(IERC721Metadata).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC721-balanceOf}. */ function balanceOf(address owner) public view virtual override returns (uint256) { require(owner != address(0), "ERC721: balance query for the zero address"); return _balances[owner]; } /** * @dev See {IERC721-ownerOf}. */ function ownerOf(uint256 tokenId) public view virtual override returns (address) { address owner = _owners[tokenId]; require(owner != address(0), "ERC721: owner query for nonexistent token"); return owner; } /** * @dev See {IERC721Metadata-name}. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev See {IERC721Metadata-symbol}. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev See {IERC721Metadata-tokenURI}. */ function tokenURI(uint256 tokenId) public view virtual override returns (string memory) { require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token"); string memory baseURI = _baseURI(); return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : ""; } /** * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each * token will be the concatenation of the `baseURI` and the `tokenId`. Empty * by default, can be overriden in child contracts. */ function _baseURI() internal view virtual returns (string memory) { return ""; } /** * @dev See {IERC721-approve}. */ function approve(address to, uint256 tokenId) public virtual override { address owner = ERC721.ownerOf(tokenId); require(to != owner, "ERC721: approval to current owner"); require( _msgSender() == owner || isApprovedForAll(owner, _msgSender()), "ERC721: approve caller is not owner nor approved for all" ); _approve(to, tokenId); } /** * @dev See {IERC721-getApproved}. */ function getApproved(uint256 tokenId) public view virtual override returns (address) { require(_exists(tokenId), "ERC721: approved query for nonexistent token"); return _tokenApprovals[tokenId]; } /** * @dev See {IERC721-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public virtual override { _setApprovalForAll(_msgSender(), operator, approved); } /** * @dev See {IERC721-isApprovedForAll}. */ function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) { return _operatorApprovals[owner][operator]; } /** * @dev See {IERC721-transferFrom}. */ function transferFrom( address from, address to, uint256 tokenId ) public virtual override { //solhint-disable-next-line max-line-length require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _transfer(from, to, tokenId); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId ) public virtual override { safeTransferFrom(from, to, tokenId, ""); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes memory _data ) public virtual override { require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _safeTransfer(from, to, tokenId, _data); } /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * `_data` is additional data, it has no specified format and it is sent in call to `to`. * * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g. * implement alternative mechanisms to perform token transfer, such as signature-based. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeTransfer( address from, address to, uint256 tokenId, bytes memory _data ) internal virtual { _transfer(from, to, tokenId); require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer"); } /** * @dev Returns whether `tokenId` exists. * * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}. * * Tokens start existing when they are minted (`_mint`), * and stop existing when they are burned (`_burn`). */ function _exists(uint256 tokenId) internal view virtual returns (bool) { return _owners[tokenId] != address(0); } /** * @dev Returns whether `spender` is allowed to manage `tokenId`. * * Requirements: * * - `tokenId` must exist. */ function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) { require(_exists(tokenId), "ERC721: operator query for nonexistent token"); address owner = ERC721.ownerOf(tokenId); return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender)); } /** * @dev Safely mints `tokenId` and transfers it to `to`. * * Requirements: * * - `tokenId` must not exist. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeMint(address to, uint256 tokenId) internal virtual { _safeMint(to, tokenId, ""); } /** * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is * forwarded in {IERC721Receiver-onERC721Received} to contract recipients. */ function _safeMint( address to, uint256 tokenId, bytes memory _data ) internal virtual { _mint(to, tokenId); require( _checkOnERC721Received(address(0), to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer" ); } /** * @dev Mints `tokenId` and transfers it to `to`. * * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible * * Requirements: * * - `tokenId` must not exist. * - `to` cannot be the zero address. * * Emits a {Transfer} event. */ function _mint(address to, uint256 tokenId) internal virtual { require(to != address(0), "ERC721: mint to the zero address"); require(!_exists(tokenId), "ERC721: token already minted"); _beforeTokenTransfer(address(0), to, tokenId); _balances[to] += 1; _owners[tokenId] = to; emit Transfer(address(0), to, tokenId); _afterTokenTransfer(address(0), to, tokenId); } /** * @dev Destroys `tokenId`. * The approval is cleared when the token is burned. * * Requirements: * * - `tokenId` must exist. * * Emits a {Transfer} event. */ function _burn(uint256 tokenId) internal virtual { address owner = ERC721.ownerOf(tokenId); _beforeTokenTransfer(owner, address(0), tokenId); // Clear approvals _approve(address(0), tokenId); _balances[owner] -= 1; delete _owners[tokenId]; emit Transfer(owner, address(0), tokenId); _afterTokenTransfer(owner, address(0), tokenId); } /** * @dev Transfers `tokenId` from `from` to `to`. * As opposed to {transferFrom}, this imposes no restrictions on msg.sender. * * Requirements: * * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * * Emits a {Transfer} event. */ function _transfer( address from, address to, uint256 tokenId ) internal virtual { require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner"); require(to != address(0), "ERC721: transfer to the zero address"); _beforeTokenTransfer(from, to, tokenId); // Clear approvals from the previous owner _approve(address(0), tokenId); _balances[from] -= 1; _balances[to] += 1; _owners[tokenId] = to; emit Transfer(from, to, tokenId); _afterTokenTransfer(from, to, tokenId); } /** * @dev Approve `to` to operate on `tokenId` * * Emits a {Approval} event. */ function _approve(address to, uint256 tokenId) internal virtual { _tokenApprovals[tokenId] = to; emit Approval(ERC721.ownerOf(tokenId), to, tokenId); } /** * @dev Approve `operator` to operate on all of `owner` tokens * * Emits a {ApprovalForAll} event. */ function _setApprovalForAll( address owner, address operator, bool approved ) internal virtual { require(owner != operator, "ERC721: approve to caller"); _operatorApprovals[owner][operator] = approved; emit ApprovalForAll(owner, operator, approved); } /** * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address. * The call is not executed if the target address is not a contract. * * @param from address representing the previous owner of the given token ID * @param to target address that will receive the tokens * @param tokenId uint256 ID of the token to be transferred * @param _data bytes optional data to send along with the call * @return bool whether the call correctly returned the expected magic value */ function _checkOnERC721Received( address from, address to, uint256 tokenId, bytes memory _data ) private returns (bool) { if (to.isContract()) { try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) { return retval == IERC721Receiver.onERC721Received.selector; } catch (bytes memory reason) { if (reason.length == 0) { revert("ERC721: transfer to non ERC721Receiver implementer"); } else { assembly { revert(add(32, reason), mload(reason)) } } } } else { return true; } } /** * @dev Hook that is called before any token transfer. This includes minting * and burning. * * Calling conditions: * * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. * - When `to` is zero, ``from``'s `tokenId` will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 tokenId ) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 tokenId ) internal virtual {} } // File: @openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol // OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/ERC721Enumerable.sol) pragma solidity ^0.8.0; /** * @dev This implements an optional extension of {ERC721} defined in the EIP that adds * enumerability of all the token ids in the contract as well as all token ids owned by each * account. */ abstract contract ERC721Enumerable is ERC721, IERC721Enumerable { // Mapping from owner to list of owned token IDs mapping(address => mapping(uint256 => uint256)) private _ownedTokens; // Mapping from token ID to index of the owner tokens list mapping(uint256 => uint256) private _ownedTokensIndex; // Array with all token ids, used for enumeration uint256[] private _allTokens; // Mapping from token id to position in the allTokens array mapping(uint256 => uint256) private _allTokensIndex; /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) { return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}. */ function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) { require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds"); return _ownedTokens[owner][index]; } /** * @dev See {IERC721Enumerable-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _allTokens.length; } /** * @dev See {IERC721Enumerable-tokenByIndex}. */ function tokenByIndex(uint256 index) public view virtual override returns (uint256) { require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds"); return _allTokens[index]; } /** * @dev Hook that is called before any token transfer. This includes minting * and burning. * * Calling conditions: * * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. * - When `to` is zero, ``from``'s `tokenId` will be burned. * - `from` cannot be the zero address. * - `to` cannot be the zero address. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 tokenId ) internal virtual override { super._beforeTokenTransfer(from, to, tokenId); if (from == address(0)) { _addTokenToAllTokensEnumeration(tokenId); } else if (from != to) { _removeTokenFromOwnerEnumeration(from, tokenId); } if (to == address(0)) { _removeTokenFromAllTokensEnumeration(tokenId); } else if (to != from) { _addTokenToOwnerEnumeration(to, tokenId); } } /** * @dev Private function to add a token to this extension's ownership-tracking data structures. * @param to address representing the new owner of the given token ID * @param tokenId uint256 ID of the token to be added to the tokens list of the given address */ function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private { uint256 length = ERC721.balanceOf(to); _ownedTokens[to][length] = tokenId; _ownedTokensIndex[tokenId] = length; } /** * @dev Private function to add a token to this extension's token tracking data structures. * @param tokenId uint256 ID of the token to be added to the tokens list */ function _addTokenToAllTokensEnumeration(uint256 tokenId) private { _allTokensIndex[tokenId] = _allTokens.length; _allTokens.push(tokenId); } /** * @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that * while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for * gas optimizations e.g. when performing a transfer operation (avoiding double writes). * This has O(1) time complexity, but alters the order of the _ownedTokens array. * @param from address representing the previous owner of the given token ID * @param tokenId uint256 ID of the token to be removed from the tokens list of the given address */ function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private { // To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and // then delete the last slot (swap and pop). uint256 lastTokenIndex = ERC721.balanceOf(from) - 1; uint256 tokenIndex = _ownedTokensIndex[tokenId]; // When the token to delete is the last token, the swap operation is unnecessary if (tokenIndex != lastTokenIndex) { uint256 lastTokenId = _ownedTokens[from][lastTokenIndex]; _ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token _ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index } // This also deletes the contents at the last position of the array delete _ownedTokensIndex[tokenId]; delete _ownedTokens[from][lastTokenIndex]; } /** * @dev Private function to remove a token from this extension's token tracking data structures. * This has O(1) time complexity, but alters the order of the _allTokens array. * @param tokenId uint256 ID of the token to be removed from the tokens list */ function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private { // To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and // then delete the last slot (swap and pop). uint256 lastTokenIndex = _allTokens.length - 1; uint256 tokenIndex = _allTokensIndex[tokenId]; // When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so // rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding // an 'if' statement (like in _removeTokenFromOwnerEnumeration) uint256 lastTokenId = _allTokens[lastTokenIndex]; _allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token _allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index // This also deletes the contents at the last position of the array delete _allTokensIndex[tokenId]; _allTokens.pop(); } } // File: contracts/staking.sol pragma solidity ^0.8.12; interface IStaking { function getBaseAmount(address _user) external view returns(uint256); } contract BUGS is ERC20("$BUGS", "$BUGS"), Ownable { uint256 public timeRate = 60 * 60 * 24; mapping(address => uint256) public rewards; mapping(address => uint256) public lastUpdate; IStaking public stakingContract; constructor(address _staking) { stakingContract = IStaking(_staking); } function setStakingContract(address _staking) external onlyOwner { stakingContract = IStaking(_staking); } function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } function setTimeRate(uint256 _timeRate) external onlyOwner { timeRate = _timeRate; } function getNewReward(address _user) public view returns (uint256) { uint256 time = block.timestamp; uint256 timerUser = lastUpdate[_user]; uint256 result = 0; if (timerUser > 0) result = rewards[_user] + stakingContract.getBaseAmount(_user) * (time - timerUser) / (timeRate); else result = rewards[_user]; return result; } function calculateNewReward(address _user) public { uint256 time = block.timestamp; rewards[_user] = getNewReward(_user); lastUpdate[_user] = time; } function claimReward(address _to) external { calculateNewReward(_to); uint256 reward = rewards[_to]; if (reward > 0) { rewards[_to] = 0; _mint(_to, reward); } } function giftTokens(address _to, uint256 giftAmount) external onlyOwner { _mint(_to, giftAmount); } } contract Staking is IERC721Receiver, Ownable { using Strings for uint256; BUGS public rewardToken; struct TokenInfo { string uri; uint256 contractIdx; uint256 tokenId; uint256 tokenRate; } address[] public collectionAddresses = [ 0xc652C1800e28ADD44224F2eE0C94cAC5e9264e9C, // genesis 0x415f65ADFa35BC957507944554492C75FF1DC45F // gen 1 ]; uint256[] public baseRates = [ 100 ether, 5 ether ]; mapping(address => mapping(uint256 => uint256)) overrideBaseRate; // Mapping from owner to list of owned token [IDs, collectionIdx] mapping(address => mapping(uint256 => uint256[2])) public _ownedTokens; mapping(uint256 => address) _owners; mapping(address => uint256) public _balances; // Mapping from token ID to index of the owner tokens list mapping(uint256 => uint256) public _ownedTokensIndex; uint256 public numberOfStaked; uint256[] public _allTokens; mapping(uint256 => uint256) public _allTokensIndex; function setOverrideBaseRate(address collection, uint256 tokenId, uint256 baseRate) external onlyOwner { overrideBaseRate[collection][tokenId] = baseRate; } function setOverrideBaseRates(address collection, uint256[] memory tokenIds, uint256[] memory tokenBaseRates) external onlyOwner { require(tokenIds.length == baseRates.length, "Arrays must be the same length"); for (uint256 i = 0; i < tokenIds.length; i++) { overrideBaseRate[collection][tokenIds[i]] = tokenBaseRates[i]; } } function setCollectionAddress(uint256 idx, address to) external onlyOwner { collectionAddresses[idx] = to; } function setBaseRate(uint256 idx, uint256 rate) external onlyOwner { baseRates[idx] = rate; } function addCollection(address contractAddress, uint256 rate) external onlyOwner { collectionAddresses.push(contractAddress); baseRates.push(rate); } function onERC721Received(address, address, uint256, bytes calldata) pure external override(IERC721Receiver) returns(bytes4) { return IERC721Receiver.onERC721Received.selector; } function getCollectionAddresses() public view returns (address[] memory) { return collectionAddresses; } function getBaseRates() public view returns (uint256[] memory) { return baseRates; } // You can ignore the functions with _ at the start of their names function _addTokenToAllTokensEnumeration(uint256 tokenId) private { _allTokensIndex[tokenId] = _allTokens.length; _allTokens.push(tokenId); } function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private { // To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and // then delete the last slot (swap and pop). uint256 lastTokenIndex = _allTokens.length - 1; uint256 tokenIndex = _allTokensIndex[tokenId]; // When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so // rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding // an 'if' statement (like in _removeTokenFromOwnerEnumeration) uint256 lastTokenId = _allTokens[lastTokenIndex]; _allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token _allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index // This also deletes the contents at the last position of the array delete _allTokensIndex[tokenId]; _allTokens.pop(); } function _addTokenToOwnerEnumeration(address to, uint256 tokenId, uint256 collectionIdx) private { uint256 length = _balances[to]; _ownedTokens[to][length][0] = tokenId; _ownedTokens[to][length][1] = collectionIdx; _ownedTokensIndex[tokenId] = length; _balances[to]++; _addTokenToAllTokensEnumeration(tokenId); numberOfStaked++; } function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private { // To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and // then delete the last slot (swap and pop). uint256 lastTokenIndex = _balances[from] - 1; uint256 tokenIndex = _ownedTokensIndex[tokenId]; // When the token to delete is the last token, the swap operation is unnecessary if (tokenIndex != lastTokenIndex) { uint256 lastTokenId = _ownedTokens[from][lastTokenIndex][0]; uint256 lastTokenContractIdx = _ownedTokens[from][lastTokenIndex][1]; _ownedTokens[from][tokenIndex][0] = lastTokenId; // Move the last token to the slot of the to-delete token _ownedTokens[from][tokenIndex][1] = lastTokenContractIdx; _ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index } // This also deletes the contents at the last position of the array delete _ownedTokensIndex[tokenId]; delete _ownedTokens[from][lastTokenIndex]; _balances[from]--; _removeTokenFromAllTokensEnumeration(tokenId); numberOfStaked--; } function getTokenRate(uint256 tokenId, uint256 collectionIdx) public view returns (uint256) { if (overrideBaseRate[collectionAddresses[collectionIdx]][tokenId] > 0) { return overrideBaseRate[collectionAddresses[collectionIdx]][tokenId]; } else { return baseRates[collectionIdx]; } } // Returns all the token uris and token ids for a given user address that are not staked // inside the contract function getUnstaked(address targetAddress) public view returns(TokenInfo[] memory) { uint256 totalBalance = 0; for(uint256 j = 0; j < collectionAddresses.length; j++){ ERC721Enumerable collectionContract = ERC721Enumerable(collectionAddresses[j]); totalBalance += collectionContract.balanceOf(targetAddress); } TokenInfo[] memory tokenInfo = new TokenInfo[](totalBalance); uint256 currentIdx = 0; for(uint256 j = 0; j < collectionAddresses.length; j++){ ERC721Enumerable collectionContract = ERC721Enumerable(collectionAddresses[j]); for(uint256 i = 0; i < collectionContract.balanceOf(targetAddress); i++){ uint256 tokenId = collectionContract.tokenOfOwnerByIndex(targetAddress, i); tokenInfo[currentIdx].uri = collectionContract.tokenURI(tokenId); tokenInfo[currentIdx].tokenId = tokenId; tokenInfo[currentIdx].contractIdx = j; tokenInfo[currentIdx].tokenRate = getTokenRate(tokenInfo[currentIdx].tokenId, tokenInfo[currentIdx].contractIdx); currentIdx++; } } return tokenInfo; } // same as tokenUris but only for the staked function getStaked(address targetAddress) external view returns (TokenInfo[] memory) { TokenInfo[] memory tokenInfo = new TokenInfo[](_balances[targetAddress]); for(uint256 i = 0; i < _balances[targetAddress]; i++){ tokenInfo[i].tokenId = _ownedTokens[targetAddress][i][0]; tokenInfo[i].contractIdx = _ownedTokens[targetAddress][i][1]; tokenInfo[i].uri = ERC721Enumerable(collectionAddresses[tokenInfo[i].contractIdx]).tokenURI(tokenInfo[i].tokenId); tokenInfo[i].tokenRate = getTokenRate(tokenInfo[i].tokenId, tokenInfo[i].contractIdx ); } return tokenInfo; } function setRewardToken(address _rewardToken) external onlyOwner { rewardToken = BUGS(_rewardToken); } function _min(uint256 a, uint256 b) private pure returns(uint256) { return a >= b ? b : a; } function getBaseAmount(address targetAddress) public view returns (uint256) { uint256 sum = 0; for(uint256 i = 0; i < _balances[targetAddress]; i++){ uint256 tokenId = _ownedTokens[targetAddress][i][0]; uint256 collectionIdx = _ownedTokens[targetAddress][i][1]; sum += getTokenRate(tokenId, collectionIdx); } return sum; } // transfer tokens from user to the contract for staking function stakeToken(uint256[]calldata tokenIds, uint256[]calldata collectionIdx) external { require(tokenIds.length == collectionIdx.length, "Array lengths must match"); rewardToken.calculateNewReward(msg.sender); for(uint256 i = 0; i < tokenIds.length; i++){ ERC721Enumerable collectionContract = ERC721Enumerable(collectionAddresses[collectionIdx[i]]); collectionContract.transferFrom(msg.sender, address(this), tokenIds[i]); _addTokenToOwnerEnumeration(msg.sender, tokenIds[i], collectionIdx[i]); _owners[tokenIds[i]] = msg.sender; } } // tranfers the token back to the user from the contract function unstake(uint256[]calldata tokenIds, uint256[]calldata collectionIdx) external { require(tokenIds.length == collectionIdx.length, "Array lengths must match"); for(uint256 i = 0; i < tokenIds.length; i++){ require(_owners[tokenIds[i]] == msg.sender, "Trying to unstake unowned token"); IERC721(collectionAddresses[collectionIdx[i]]).transferFrom(address(this), msg.sender, tokenIds[i]); _removeTokenFromOwnerEnumeration(msg.sender, tokenIds[i]); _owners[tokenIds[i]] = address(0); } rewardToken.calculateNewReward(msg.sender); } function withdraw() external onlyOwner { require(payable(msg.sender).send(address(this).balance)); } }
True
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/** *Submitted for verification at Etherscan.io on 2021-08-08 */ // SPDX-License-Identifier: AGPL-3.0-or-later // hevm: flattened sources of contracts/FundingLocker.sol pragma solidity =0.6.11 >=0.6.0 <0.8.0 >=0.6.2 <0.8.0; ////// lib/openzeppelin-contracts/contracts/math/SafeMath.sol /* pragma solidity >=0.6.0 <0.8.0; */ /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when an * operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } ////// lib/openzeppelin-contracts/contracts/token/ERC20/IERC20.sol /* pragma solidity >=0.6.0 <0.8.0; */ /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } ////// lib/openzeppelin-contracts/contracts/utils/Address.sol /* pragma solidity >=0.6.2 <0.8.0; */ /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: value }(data); return _verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.staticcall(data); return _verifyCallResult(success, returndata, errorMessage); } function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } ////// lib/openzeppelin-contracts/contracts/token/ERC20/SafeERC20.sol /* pragma solidity >=0.6.0 <0.8.0; */ /* import "./IERC20.sol"; */ /* import "../../math/SafeMath.sol"; */ /* import "../../utils/Address.sol"; */ /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove(IERC20 token, address spender, uint256 value) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' // solhint-disable-next-line max-line-length require((value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } } ////// contracts/FundingLocker.sol /* pragma solidity 0.6.11; */ /* import "lib/openzeppelin-contracts/contracts/token/ERC20/SafeERC20.sol"; */ /// @title FundingLocker holds custody of Liquidity Asset tokens during the funding period of a Loan. contract FundingLocker { using SafeERC20 for IERC20; IERC20 public immutable liquidityAsset; // Asset the Loan was funded with. address public immutable loan; // Loan this FundingLocker has funded. constructor(address _liquidityAsset, address _loan) public { liquidityAsset = IERC20(_liquidityAsset); loan = _loan; } /** @dev Checks that `msg.sender` is the Loan. */ modifier isLoan() { require(msg.sender == loan, "FL:NOT_L"); _; } /** @dev Transfers amount of Liquidity Asset to a destination account. Only the Loan can call this function. @param dst Destination to transfer Liquidity Asset to. @param amt Amount of Liquidity Asset to transfer. */ function pull(address dst, uint256 amt) isLoan external { liquidityAsset.safeTransfer(dst, amt); } /** @dev Transfers entire amount of Liquidity Asset held in escrow to the Loan. Only the Loan can call this function. */ function drain() isLoan external { uint256 amt = liquidityAsset.balanceOf(address(this)); liquidityAsset.safeTransfer(loan, amt); } }
True
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// SPDX-License-Identifier: MIT pragma solidity 0.6.12; // File: @openzeppelin/contracts/token/ERC20/IERC20.sol /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } // File: @openzeppelin/contracts/math/SafeMath.sol /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when an * operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } // File: @openzeppelin/contracts/utils/Address.sol /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies in extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } // File: @openzeppelin/contracts/token/ERC20/SafeERC20.sol /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove(IERC20 token, address spender, uint256 value) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' // solhint-disable-next-line max-line-length require((value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } } // File: @openzeppelin/contracts/utils/EnumerableSet.sol /** * @dev Library for managing * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive * types. * * Sets have the following properties: * * - Elements are added, removed, and checked for existence in constant time * (O(1)). * - Elements are enumerated in O(n). No guarantees are made on the ordering. * * ``` * contract Example { * // Add the library methods * using EnumerableSet for EnumerableSet.AddressSet; * * // Declare a set state variable * EnumerableSet.AddressSet private mySet; * } * ``` * * As of v3.0.0, only sets of type `address` (`AddressSet`) and `uint256` * (`UintSet`) are supported. */ library EnumerableSet { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping (bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; // When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement. bytes32 lastvalue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastvalue; // Update the index for the moved value set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { require(set._values.length > index, "EnumerableSet: index out of bounds"); return set._values[index]; } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(value))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(value))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(value))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint256(_at(set._inner, index))); } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values on the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } } // File: @openzeppelin/contracts/GSN/Context.sol /* * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with GSN meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } // File: @openzeppelin/contracts/access/Ownable.sol /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor () internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } // File: @openzeppelin/contracts/token/ERC20/ERC20.sol /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin guidelines: functions revert instead * of returning `false` on failure. This behavior is nonetheless conventional * and does not conflict with the expectations of ERC20 applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20 is Context, IERC20 { using SafeMath for uint256; using Address for address; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; uint8 private _decimals; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ constructor (string memory name, string memory symbol) public { _name = name; _symbol = symbol; _decimals = 18; } /** * @dev Returns the name of the token. */ function name() public view returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is * called. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Sets {decimals} to a value other than the default one of 18. * * WARNING: This function should only be called from the constructor. Most * applications that interact with token contracts will not expect * {decimals} to ever change, and may work incorrectly if it does. */ function _setupDecimals(uint8 decimals_) internal { _decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } } // File: contracts/VALUE/ValueLiquidityToken.sol // Value Liquidity (VALUE) with Governance Alpha contract ValueLiquidityToken is ERC20 { using SafeERC20 for IERC20; using SafeMath for uint256; IERC20 public yfv; address public governance; uint256 public cap; uint256 public yfvLockedBalance; mapping(address => bool) public minters; event Deposit(address indexed dst, uint amount); event Withdrawal(address indexed src, uint amount); constructor (IERC20 _yfv, uint256 _cap) public ERC20("Value Liquidity", "VALUE") { governance = msg.sender; yfv = _yfv; cap = _cap; } function mint(address _to, uint256 _amount) public { require(msg.sender == governance || minters[msg.sender], "!governance && !minter"); _mint(_to, _amount); _moveDelegates(address(0), _delegates[_to], _amount); } function burn(uint256 _amount) public { _burn(msg.sender, _amount); _moveDelegates(_delegates[msg.sender], address(0), _amount); } function burnFrom(address _account, uint256 _amount) public { uint256 decreasedAllowance = allowance(_account, msg.sender).sub(_amount, "ERC20: burn amount exceeds allowance"); _approve(_account, msg.sender, decreasedAllowance); _burn(_account, _amount); _moveDelegates(_delegates[_account], address(0), _amount); } function setGovernance(address _governance) public { require(msg.sender == governance, "!governance"); governance = _governance; } function addMinter(address _minter) public { require(msg.sender == governance, "!governance"); minters[_minter] = true; } function removeMinter(address _minter) public { require(msg.sender == governance, "!governance"); minters[_minter] = false; } function setCap(uint256 _cap) public { require(msg.sender == governance, "!governance"); require(_cap.add(yfvLockedBalance) >= totalSupply(), "_cap (plus yfvLockedBalance) is below current supply"); cap = _cap; } function deposit(uint256 _amount) public { yfv.safeTransferFrom(msg.sender, address(this), _amount); yfvLockedBalance = yfvLockedBalance.add(_amount); _mint(msg.sender, _amount); _moveDelegates(address(0), _delegates[msg.sender], _amount); Deposit(msg.sender, _amount); } function withdraw(uint256 _amount) public { yfvLockedBalance = yfvLockedBalance.sub(_amount, "There is not enough locked YFV to withdraw"); yfv.safeTransfer(msg.sender, _amount); _burn(msg.sender, _amount); _moveDelegates(_delegates[msg.sender], address(0), _amount); Withdrawal(msg.sender, _amount); } // This function allows governance to take unsupported tokens out of the contract. // This is in an effort to make someone whole, should they seriously mess up. // There is no guarantee governance will vote to return these. // It also allows for removal of airdropped tokens. function governanceRecoverUnsupported(IERC20 _token, address _to, uint256 _amount) external { require(msg.sender == governance, "!governance"); if (_token == yfv) { uint256 yfvBalance = yfv.balanceOf(address(this)); require(_amount <= yfvBalance.sub(yfvLockedBalance), "cant withdraw more then stuck amount"); } _token.safeTransfer(_to, _amount); } /** * @dev See {ERC20-_beforeTokenTransfer}. * * Requirements: * * - minted tokens must not cause the total supply to go over the cap. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override { super._beforeTokenTransfer(from, to, amount); if (from == address(0)) {// When minting tokens require(totalSupply().add(amount) <= cap.add(yfvLockedBalance), "ERC20Capped: cap exceeded"); } } // Copied and modified from YAM code: // https://github.com/yam-finance/yam-protocol/blob/master/contracts/token/YAMGovernanceStorage.sol // https://github.com/yam-finance/yam-protocol/blob/master/contracts/token/YAMGovernance.sol // Which is copied and modified from COMPOUND: // https://github.com/compound-finance/compound-protocol/blob/master/contracts/Governance/Comp.sol /// @dev A record of each accounts delegate mapping(address => address) internal _delegates; /// @notice A checkpoint for marking number of votes from a given block struct Checkpoint { uint32 fromBlock; uint256 votes; } /// @notice A record of votes checkpoints for each account, by index mapping(address => mapping(uint32 => Checkpoint)) public checkpoints; /// @notice The number of checkpoints for each account mapping(address => uint32) public numCheckpoints; /// @notice The EIP-712 typehash for the contract's domain bytes32 public constant DOMAIN_TYPEHASH = keccak256("EIP712Domain(string name,uint256 chainId,address verifyingContract)"); /// @notice The EIP-712 typehash for the delegation struct used by the contract bytes32 public constant DELEGATION_TYPEHASH = keccak256("Delegation(address delegatee,uint256 nonce,uint256 expiry)"); /// @notice A record of states for signing / validating signatures mapping(address => uint) public nonces; /// @notice An event thats emitted when an account changes its delegate event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate); /// @notice An event thats emitted when a delegate account's vote balance changes event DelegateVotesChanged(address indexed delegate, uint previousBalance, uint newBalance); /** * @notice Delegate votes from `msg.sender` to `delegatee` * @param delegator The address to get delegatee for */ function delegates(address delegator) external view returns (address) { return _delegates[delegator]; } /** * @notice Delegate votes from `msg.sender` to `delegatee` * @param delegatee The address to delegate votes to */ function delegate(address delegatee) external { return _delegate(msg.sender, delegatee); } /** * @notice Delegates votes from signatory to `delegatee` * @param delegatee The address to delegate votes to * @param nonce The contract state required to match the signature * @param expiry The time at which to expire the signature * @param v The recovery byte of the signature * @param r Half of the ECDSA signature pair * @param s Half of the ECDSA signature pair */ function delegateBySig( address delegatee, uint nonce, uint expiry, uint8 v, bytes32 r, bytes32 s ) external { bytes32 domainSeparator = keccak256( abi.encode( DOMAIN_TYPEHASH, keccak256(bytes(name())), getChainId(), address(this) ) ); bytes32 structHash = keccak256( abi.encode( DELEGATION_TYPEHASH, delegatee, nonce, expiry ) ); bytes32 digest = keccak256( abi.encodePacked( "\x19\x01", domainSeparator, structHash ) ); address signatory = ecrecover(digest, v, r, s); require(signatory != address(0), "VALUE::delegateBySig: invalid signature"); require(nonce == nonces[signatory]++, "VALUE::delegateBySig: invalid nonce"); require(now <= expiry, "VALUE::delegateBySig: signature expired"); return _delegate(signatory, delegatee); } /** * @notice Gets the current votes balance for `account` * @param account The address to get votes balance * @return The number of current votes for `account` */ function getCurrentVotes(address account) external view returns (uint256) { uint32 nCheckpoints = numCheckpoints[account]; return nCheckpoints > 0 ? checkpoints[account][nCheckpoints - 1].votes : 0; } /** * @notice Determine the prior number of votes for an account as of a block number * @dev Block number must be a finalized block or else this function will revert to prevent misinformation. * @param account The address of the account to check * @param blockNumber The block number to get the vote balance at * @return The number of votes the account had as of the given block */ function getPriorVotes(address account, uint blockNumber) external view returns (uint256) { require(blockNumber < block.number, "VALUE::getPriorVotes: not yet determined"); uint32 nCheckpoints = numCheckpoints[account]; if (nCheckpoints == 0) { return 0; } // First check most recent balance if (checkpoints[account][nCheckpoints - 1].fromBlock <= blockNumber) { return checkpoints[account][nCheckpoints - 1].votes; } // Next check implicit zero balance if (checkpoints[account][0].fromBlock > blockNumber) { return 0; } uint32 lower = 0; uint32 upper = nCheckpoints - 1; while (upper > lower) { uint32 center = upper - (upper - lower) / 2; // ceil, avoiding overflow Checkpoint memory cp = checkpoints[account][center]; if (cp.fromBlock == blockNumber) { return cp.votes; } else if (cp.fromBlock < blockNumber) { lower = center; } else { upper = center - 1; } } return checkpoints[account][lower].votes; } function _delegate(address delegator, address delegatee) internal { address currentDelegate = _delegates[delegator]; uint256 delegatorBalance = balanceOf(delegator); // balance of underlying VALUEs (not scaled); _delegates[delegator] = delegatee; emit DelegateChanged(delegator, currentDelegate, delegatee); _moveDelegates(currentDelegate, delegatee, delegatorBalance); } function _moveDelegates(address srcRep, address dstRep, uint256 amount) internal { if (srcRep != dstRep && amount > 0) { if (srcRep != address(0)) { // decrease old representative uint32 srcRepNum = numCheckpoints[srcRep]; uint256 srcRepOld = srcRepNum > 0 ? checkpoints[srcRep][srcRepNum - 1].votes : 0; uint256 srcRepNew = srcRepOld.sub(amount); _writeCheckpoint(srcRep, srcRepNum, srcRepOld, srcRepNew); } if (dstRep != address(0)) { // increase new representative uint32 dstRepNum = numCheckpoints[dstRep]; uint256 dstRepOld = dstRepNum > 0 ? checkpoints[dstRep][dstRepNum - 1].votes : 0; uint256 dstRepNew = dstRepOld.add(amount); _writeCheckpoint(dstRep, dstRepNum, dstRepOld, dstRepNew); } } } function _writeCheckpoint( address delegatee, uint32 nCheckpoints, uint256 oldVotes, uint256 newVotes ) internal { uint32 blockNumber = safe32(block.number, "VALUE::_writeCheckpoint: block number exceeds 32 bits"); if (nCheckpoints > 0 && checkpoints[delegatee][nCheckpoints - 1].fromBlock == blockNumber) { checkpoints[delegatee][nCheckpoints - 1].votes = newVotes; } else { checkpoints[delegatee][nCheckpoints] = Checkpoint(blockNumber, newVotes); numCheckpoints[delegatee] = nCheckpoints + 1; } emit DelegateVotesChanged(delegatee, oldVotes, newVotes); } function safe32(uint n, string memory errorMessage) internal pure returns (uint32) { require(n < 2 ** 32, errorMessage); return uint32(n); } function getChainId() internal pure returns (uint) { uint256 chainId; assembly {chainId := chainid()} return chainId; } } // File: contracts/VALUE/ValueMasterPool.sol interface ILiquidityMigrator { // Perform LP token migration from legacy Balancer to ValueLiquid. // Take the current LP token address and return the new LP token address. // Migrator should have full access to the caller's LP token. // Return the new LP token address. // // XXX Migrator must have allowance access to Balancer LP tokens. // ValueLiquid must mint EXACTLY the same amount of Balancer LP tokens or // else something bad will happen. Traditional Balancer does not // do that so be careful! function migrate(IERC20 token) external returns (IERC20); } interface IYFVReferral { function setReferrer(address farmer, address referrer) external; function getReferrer(address farmer) external view returns (address); } interface IFreeFromUpTo { function freeFromUpTo(address from, uint256 value) external returns (uint256 freed); } // Note that it's ownable and the owner wields tremendous power. The ownership // will be transferred to a governance smart contract (Timelock multisig signers) once VALUE is sufficiently // distributed and the community can show to govern itself. // // Have fun reading it. Hopefully it's bug-free. God bless. contract ValueMasterPool is Ownable { using SafeMath for uint256; using SafeERC20 for IERC20; IFreeFromUpTo public constant chi = IFreeFromUpTo(0x0000000000004946c0e9F43F4Dee607b0eF1fA1c); modifier discountCHI { uint256 gasStart = gasleft(); _; uint256 gasSpent = 21000 + gasStart - gasleft() + 16 * msg.data.length; chi.freeFromUpTo(msg.sender, (gasSpent + 14154) / 41130); } // Info of each user. struct UserInfo { uint256 amount; // How many LP tokens the user has provided. uint256 rewardDebt; // Reward debt. See explanation below. // // We do some fancy math here. Basically, any point in time, the amount of VALUEs // entitled to a user but is pending to be distributed is: // // pending reward = (user.amount * pool.accValuePerShare) - user.rewardDebt // // Whenever a user deposits or withdraws LP tokens to a pool. Here's what happens: // 1. The pool's `accValuePerShare` (and `lastRewardBlock`) gets updated. // 2. User receives the pending reward sent to his/her address. // 3. User's `amount` gets updated. // 4. User's `rewardDebt` gets updated. uint256 accumulatedStakingPower; // will accumulate every time user harvest } // Info of each pool. struct PoolInfo { IERC20 lpToken; // Address of LP token contract. uint256 allocPoint; // How many allocation points assigned to this pool. VALUEs to distribute per block. uint256 lastRewardBlock; // Last block number that VALUEs distribution occurs. uint256 accValuePerShare; // Accumulated VALUEs per share, times 1e12. See below. bool isStarted; // if lastRewardBlock has passed } uint256 public constant REFERRAL_COMMISSION_PERCENT = 1; address public rewardReferral; // The VALUE TOKEN! ValueLiquidityToken public value; // InsuranceFund address. address public insuranceFundAddr; // VALUE tokens created per block. uint256 public valuePerBlock; // The liquidity migrator contract. It has a lot of power. Can only be set through governance (owner). ILiquidityMigrator public migrator; // Info of each pool. PoolInfo[] public poolInfo; // Info of each user that stakes LP tokens. mapping (uint256 => mapping (address => UserInfo)) public userInfo; // Total allocation poitns. Must be the sum of all allocation points in all pools. uint256 public totalAllocPoint = 0; // The block number when VALUE mining starts. uint256 public startBlock; // Block number when each epoch ends. uint256[3] public epochEndBlocks = [10887300, 11080000, 20000000]; // Reward multipler uint256[4] public epochRewardMultiplers = [5000, 10000, 1, 0]; event Deposit(address indexed user, uint256 indexed pid, uint256 amount); event Withdraw(address indexed user, uint256 indexed pid, uint256 amount); event EmergencyWithdraw(address indexed user, uint256 indexed pid, uint256 amount); constructor( ValueLiquidityToken _value, address _insuranceFundAddr, uint256 _valuePerBlock, uint256 _startBlock ) public { value = _value; insuranceFundAddr = _insuranceFundAddr; valuePerBlock = _valuePerBlock; // supposed to be 0.001 (1e16 wei) startBlock = _startBlock; // supposed to be 10,883,800 (Fri Sep 18 2020 3:00:00 GMT+0) } function poolLength() external view returns (uint256) { return poolInfo.length; } // Add a new lp to the pool. Can only be called by the owner. // XXX DO NOT add the same LP token more than once. Rewards will be messed up if you do. function add(uint256 _allocPoint, IERC20 _lpToken, bool _withUpdate, uint256 _lastRewardBlock) public onlyOwner { if (_withUpdate) { massUpdatePools(); } if (block.number < startBlock) { // chef is sleeping if (_lastRewardBlock == 0) { _lastRewardBlock = startBlock; } else { if (_lastRewardBlock < startBlock) { _lastRewardBlock = startBlock; } } } else { // chef is cooking if (_lastRewardBlock == 0 || _lastRewardBlock < block.number) { _lastRewardBlock = block.number; } } bool _isStarted = (block.number >= _lastRewardBlock) && (_lastRewardBlock >= startBlock); poolInfo.push(PoolInfo({ lpToken: _lpToken, allocPoint: _allocPoint, lastRewardBlock: _lastRewardBlock, accValuePerShare: 0, isStarted: _isStarted })); if (_isStarted) { totalAllocPoint = totalAllocPoint.add(_allocPoint); } } // Update the given pool's VALUE allocation point. Can only be called by the owner. function set(uint256 _pid, uint256 _allocPoint, bool _withUpdate) public onlyOwner { if (_withUpdate) { massUpdatePools(); } PoolInfo storage pool = poolInfo[_pid]; if (pool.isStarted) { totalAllocPoint = totalAllocPoint.sub(pool.allocPoint).add(_allocPoint); } pool.allocPoint = _allocPoint; } function setValuePerBlock(uint256 _valuePerBlock) public onlyOwner { massUpdatePools(); valuePerBlock = _valuePerBlock; } function setEpochEndBlock(uint8 _index, uint256 _epochEndBlock) public onlyOwner { require(_index < 3, "_index out of range"); require(_epochEndBlock > block.number, "Too late to update"); require(epochEndBlocks[_index] > block.number, "Too late to update"); epochEndBlocks[_index] = _epochEndBlock; } function setEpochRewardMultipler(uint8 _index, uint256 _epochRewardMultipler) public onlyOwner { require(_index > 0 && _index < 4, "Index out of range"); require(epochEndBlocks[_index - 1] > block.number, "Too late to update"); epochRewardMultiplers[_index] = _epochRewardMultipler; } function setRewardReferral(address _rewardReferral) external onlyOwner { rewardReferral = _rewardReferral; } // Set the migrator contract. Can only be called by the owner. function setMigrator(ILiquidityMigrator _migrator) public onlyOwner { migrator = _migrator; } // Migrate lp token to another lp contract. function migrate(uint256 _pid) public onlyOwner { require(address(migrator) != address(0), "migrate: no migrator"); PoolInfo storage pool = poolInfo[_pid]; IERC20 lpToken = pool.lpToken; uint256 bal = lpToken.balanceOf(address(this)); lpToken.safeApprove(address(migrator), bal); IERC20 newLpToken = migrator.migrate(lpToken); require(bal == newLpToken.balanceOf(address(this)), "migrate: bad"); pool.lpToken = newLpToken; } // Return reward multiplier over the given _from to _to block. function getMultiplier(uint256 _from, uint256 _to) public view returns (uint256) { for (uint8 epochId = 3; epochId >= 1; --epochId) { if (_to >= epochEndBlocks[epochId - 1]) { if (_from >= epochEndBlocks[epochId - 1]) return _to.sub(_from).mul(epochRewardMultiplers[epochId]); uint256 multiplier = _to.sub(epochEndBlocks[epochId - 1]).mul(epochRewardMultiplers[epochId]); if (epochId == 1) return multiplier.add(epochEndBlocks[0].sub(_from).mul(epochRewardMultiplers[0])); for (epochId = epochId - 1; epochId >= 1; --epochId) { if (_from >= epochEndBlocks[epochId - 1]) return multiplier.add(epochEndBlocks[epochId].sub(_from).mul(epochRewardMultiplers[epochId])); multiplier = multiplier.add(epochEndBlocks[epochId].sub(epochEndBlocks[epochId - 1]).mul(epochRewardMultiplers[epochId])); } return multiplier.add(epochEndBlocks[0].sub(_from).mul(epochRewardMultiplers[0])); } } return _to.sub(_from).mul(epochRewardMultiplers[0]); } // View function to see pending VALUEs on frontend. function pendingValue(uint256 _pid, address _user) public view returns (uint256) { PoolInfo storage pool = poolInfo[_pid]; UserInfo storage user = userInfo[_pid][_user]; uint256 accValuePerShare = pool.accValuePerShare; uint256 lpSupply = pool.lpToken.balanceOf(address(this)); if (block.number > pool.lastRewardBlock && lpSupply != 0) { uint256 multiplier = getMultiplier(pool.lastRewardBlock, block.number); if (totalAllocPoint > 0) { uint256 valueReward = multiplier.mul(valuePerBlock).mul(pool.allocPoint).div(totalAllocPoint); accValuePerShare = accValuePerShare.add(valueReward.mul(1e12).div(lpSupply)); } } return user.amount.mul(accValuePerShare).div(1e12).sub(user.rewardDebt); } function stakingPower(uint256 _pid, address _user) public view returns (uint256) { UserInfo storage user = userInfo[_pid][_user]; return user.accumulatedStakingPower.add(pendingValue(_pid, _user)); } // Update reward variables for all pools. Be careful of gas spending! function massUpdatePools() public discountCHI { uint256 length = poolInfo.length; for (uint256 pid = 0; pid < length; ++pid) { updatePool(pid); } } // Update reward variables of the given pool to be up-to-date. function updatePool(uint256 _pid) public discountCHI { PoolInfo storage pool = poolInfo[_pid]; if (block.number <= pool.lastRewardBlock) { return; } uint256 lpSupply = pool.lpToken.balanceOf(address(this)); if (lpSupply == 0) { pool.lastRewardBlock = block.number; return; } if (!pool.isStarted) { pool.isStarted = true; totalAllocPoint = totalAllocPoint.add(pool.allocPoint); } uint256 multiplier = getMultiplier(pool.lastRewardBlock, block.number); if (totalAllocPoint > 0) { uint256 valueReward = multiplier.mul(valuePerBlock).mul(pool.allocPoint).div(totalAllocPoint); safeValueMint(address(this), valueReward); pool.accValuePerShare = pool.accValuePerShare.add(valueReward.mul(1e12).div(lpSupply)); } pool.lastRewardBlock = block.number; } // Deposit LP tokens to ValueMasterPool for VALUE allocation. function deposit(uint256 _pid, uint256 _amount, address _referrer) public discountCHI { PoolInfo storage pool = poolInfo[_pid]; UserInfo storage user = userInfo[_pid][msg.sender]; updatePool(_pid); if (rewardReferral != address(0) && _referrer != address(0)) { require(_referrer != msg.sender, "You cannot refer yourself."); IYFVReferral(rewardReferral).setReferrer(msg.sender, _referrer); } if (user.amount > 0) { uint256 pending = user.amount.mul(pool.accValuePerShare).div(1e12).sub(user.rewardDebt); if(pending > 0) { user.accumulatedStakingPower = user.accumulatedStakingPower.add(pending); uint256 actualPaid = pending.mul(100 - REFERRAL_COMMISSION_PERCENT).div(100); // 99% uint256 commission = pending - actualPaid; // 1% safeValueTransfer(msg.sender, actualPaid); if (rewardReferral != address(0)) { _referrer = IYFVReferral(rewardReferral).getReferrer(msg.sender); } if (_referrer != address(0)) { // send commission to referrer safeValueTransfer(_referrer, commission); } else { // send commission to insuranceFundAddr safeValueTransfer(insuranceFundAddr, commission); } } } if(_amount > 0) { pool.lpToken.safeTransferFrom(address(msg.sender), address(this), _amount); user.amount = user.amount.add(_amount); } user.rewardDebt = user.amount.mul(pool.accValuePerShare).div(1e12); emit Deposit(msg.sender, _pid, _amount); } // Withdraw LP tokens from ValueMasterPool. function withdraw(uint256 _pid, uint256 _amount) public discountCHI { PoolInfo storage pool = poolInfo[_pid]; UserInfo storage user = userInfo[_pid][msg.sender]; require(user.amount >= _amount, "withdraw: not good"); updatePool(_pid); uint256 pending = user.amount.mul(pool.accValuePerShare).div(1e12).sub(user.rewardDebt); if(pending > 0) { user.accumulatedStakingPower = user.accumulatedStakingPower.add(pending); uint256 actualPaid = pending.mul(100 - REFERRAL_COMMISSION_PERCENT).div(100); // 99% uint256 commission = pending - actualPaid; // 1% safeValueTransfer(msg.sender, actualPaid); address _referrer = address(0); if (rewardReferral != address(0)) { _referrer = IYFVReferral(rewardReferral).getReferrer(msg.sender); } if (_referrer != address(0)) { // send commission to referrer safeValueTransfer(_referrer, commission); } else { // send commission to insuranceFundAddr safeValueTransfer(insuranceFundAddr, commission); } } if(_amount > 0) { user.amount = user.amount.sub(_amount); pool.lpToken.safeTransfer(address(msg.sender), _amount); } user.rewardDebt = user.amount.mul(pool.accValuePerShare).div(1e12); emit Withdraw(msg.sender, _pid, _amount); } // Withdraw without caring about rewards. EMERGENCY ONLY. function emergencyWithdraw(uint256 _pid) public { PoolInfo storage pool = poolInfo[_pid]; UserInfo storage user = userInfo[_pid][msg.sender]; pool.lpToken.safeTransfer(address(msg.sender), user.amount); emit EmergencyWithdraw(msg.sender, _pid, user.amount); user.amount = 0; user.rewardDebt = 0; } // Safe value mint, ensure it is never over cap and we are the current owner. function safeValueMint(address _to, uint256 _amount) internal { if (value.minters(address(this)) && _to != address(0)) { uint256 totalSupply = value.totalSupply(); uint256 realCap = value.cap().add(value.yfvLockedBalance()); if (totalSupply.add(_amount) > realCap) { value.mint(_to, realCap.sub(totalSupply)); } else { value.mint(_to, _amount); } } } // Safe value transfer function, just in case if rounding error causes pool to not have enough VALUEs. function safeValueTransfer(address _to, uint256 _amount) internal { uint256 valueBal = value.balanceOf(address(this)); if (_amount > valueBal) { value.transfer(_to, valueBal); } else { value.transfer(_to, _amount); } } // Update insuranceFund by the previous insuranceFund contract. function setInsuranceFundAddr(address _insuranceFundAddr) public { require(msg.sender == insuranceFundAddr, "insuranceFund: wut?"); insuranceFundAddr = _insuranceFundAddr; } // This function allows governance to take unsupported tokens out of the contract, since this pool exists longer than the other pools. // This is in an effort to make someone whole, should they seriously mess up. // There is no guarantee governance will vote to return these. // It also allows for removal of airdropped tokens. function governanceRecoverUnsupported(IERC20 _token, uint256 amount, address to) external onlyOwner { uint256 length = poolInfo.length; for (uint256 pid = 0; pid < length; ++pid) { PoolInfo storage pool = poolInfo[pid]; // cant take staked asset require(_token != pool.lpToken, "!pool.lpToken"); } // transfer to _token.safeTransfer(to, amount); } }
True
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// File: node_modules\@openzeppelin\contracts\GSN\Context.sol // SPDX-License-Identifier: MIT pragma solidity ^0.6.0; /* * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with GSN meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } // File: @openzeppelin\contracts\access\Ownable.sol pragma solidity ^0.6.0; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor () internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } // File: node_modules\@openzeppelin\contracts\utils\EnumerableSet.sol pragma solidity ^0.6.0; /** * @dev Library for managing * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive * types. * * Sets have the following properties: * * - Elements are added, removed, and checked for existence in constant time * (O(1)). * - Elements are enumerated in O(n). No guarantees are made on the ordering. * * ``` * contract Example { * // Add the library methods * using EnumerableSet for EnumerableSet.AddressSet; * * // Declare a set state variable * EnumerableSet.AddressSet private mySet; * } * ``` * * As of v3.0.0, only sets of type `address` (`AddressSet`) and `uint256` * (`UintSet`) are supported. */ library EnumerableSet { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping (bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; // When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement. bytes32 lastvalue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastvalue; // Update the index for the moved value set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { require(set._values.length > index, "EnumerableSet: index out of bounds"); return set._values[index]; } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(value))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(value))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(value))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint256(_at(set._inner, index))); } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values on the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } } // File: node_modules\@openzeppelin\contracts\utils\Address.sol pragma solidity ^0.6.2; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } // File: @openzeppelin\contracts\access\AccessControl.sol pragma solidity ^0.6.0; /** * @dev Contract module that allows children to implement role-based access * control mechanisms. * * Roles are referred to by their `bytes32` identifier. These should be exposed * in the external API and be unique. The best way to achieve this is by * using `public constant` hash digests: * * ``` * bytes32 public constant MY_ROLE = keccak256("MY_ROLE"); * ``` * * Roles can be used to represent a set of permissions. To restrict access to a * function call, use {hasRole}: * * ``` * function foo() public { * require(hasRole(MY_ROLE, msg.sender)); * ... * } * ``` * * Roles can be granted and revoked dynamically via the {grantRole} and * {revokeRole} functions. Each role has an associated admin role, and only * accounts that have a role's admin role can call {grantRole} and {revokeRole}. * * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means * that only accounts with this role will be able to grant or revoke other * roles. More complex role relationships can be created by using * {_setRoleAdmin}. * * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to * grant and revoke this role. Extra precautions should be taken to secure * accounts that have been granted it. */ abstract contract AccessControl is Context { using EnumerableSet for EnumerableSet.AddressSet; using Address for address; struct RoleData { EnumerableSet.AddressSet members; bytes32 adminRole; } mapping (bytes32 => RoleData) private _roles; bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00; /** * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole` * * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite * {RoleAdminChanged} not being emitted signaling this. * * _Available since v3.1._ */ event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole); /** * @dev Emitted when `account` is granted `role`. * * `sender` is the account that originated the contract call, an admin role * bearer except when using {_setupRole}. */ event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Emitted when `account` is revoked `role`. * * `sender` is the account that originated the contract call: * - if using `revokeRole`, it is the admin role bearer * - if using `renounceRole`, it is the role bearer (i.e. `account`) */ event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) public view returns (bool) { return _roles[role].members.contains(account); } /** * @dev Returns the number of accounts that have `role`. Can be used * together with {getRoleMember} to enumerate all bearers of a role. */ function getRoleMemberCount(bytes32 role) public view returns (uint256) { return _roles[role].members.length(); } /** * @dev Returns one of the accounts that have `role`. `index` must be a * value between 0 and {getRoleMemberCount}, non-inclusive. * * Role bearers are not sorted in any particular way, and their ordering may * change at any point. * * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure * you perform all queries on the same block. See the following * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post] * for more information. */ function getRoleMember(bytes32 role, uint256 index) public view returns (address) { return _roles[role].members.at(index); } /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) public view returns (bytes32) { return _roles[role].adminRole; } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) public virtual { require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to grant"); _grantRole(role, account); } /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) public virtual { require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to revoke"); _revokeRole(role, account); } /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been granted `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole(bytes32 role, address account) public virtual { require(account == _msgSender(), "AccessControl: can only renounce roles for self"); _revokeRole(role, account); } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. Note that unlike {grantRole}, this function doesn't perform any * checks on the calling account. * * [WARNING] * ==== * This function should only be called from the constructor when setting * up the initial roles for the system. * * Using this function in any other way is effectively circumventing the admin * system imposed by {AccessControl}. * ==== */ function _setupRole(bytes32 role, address account) internal virtual { _grantRole(role, account); } /** * @dev Sets `adminRole` as ``role``'s admin role. * * Emits a {RoleAdminChanged} event. */ function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual { emit RoleAdminChanged(role, _roles[role].adminRole, adminRole); _roles[role].adminRole = adminRole; } function _grantRole(bytes32 role, address account) private { if (_roles[role].members.add(account)) { emit RoleGranted(role, account, _msgSender()); } } function _revokeRole(bytes32 role, address account) private { if (_roles[role].members.remove(account)) { emit RoleRevoked(role, account, _msgSender()); } } } // File: @openzeppelin\contracts\math\SafeMath.sol pragma solidity ^0.6.0; /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when an * operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } // File: contracts\interface\IAddressResolver.sol pragma solidity ^0.6.12; interface IAddressResolver { function key2address(bytes32 key) external view returns(address); function address2key(address addr) external view returns(bytes32); function requireAndKey2Address(bytes32 name, string calldata reason) external view returns(address); function setAddress(bytes32 key, address addr) external; function setMultiAddress(bytes32[] memory keys, address[] memory addrs) external; } // File: contracts\interface\IPause.sol pragma solidity ^0.6.12; interface IPause { function pause() external; function unpause() external; } // File: contracts\interface\ILiquidate.sol pragma solidity ^0.6.12; interface ILiquidate { function liquidate(address account) external; } // File: contracts\liquidation\liquidation.sol pragma solidity ^0.6.12; interface IHasRole { function hashRole(bytes32 role, address account) external view returns (bool); function getRoleMemberCount(bytes32 role) external view returns (uint256); } contract Liquidation is AccessControl { using SafeMath for uint; bytes32 public constant TRUSTEE_ROLE = "TRUSTEE_ROLE"; bytes32 public constant BORING_DAO = "BoringDAO"; bytes32 public constant OBTC = "oBTC"; address public coreDev; bool public shouldPauseDev; bool public shouldPauseTrustee; bool public systemPause; IAddressResolver public addressReso; mapping(address => bool) public isSatellitePool; mapping(address=>mapping(address=>mapping(address=>bool))) public confirm; mapping(address=>mapping(address=>uint)) public confirmCount; mapping(address=>mapping(address=>bool)) public unpauseConfirm; mapping(address=>uint) public unpausePoolConfirmCount; constructor(address _coreDev, address _addressReso) public { _setupRole(DEFAULT_ADMIN_ROLE, msg.sender); coreDev = _coreDev; addressReso = IAddressResolver(_addressReso); } function boringDAO() internal view returns (IPause) { return IPause(addressReso.requireAndKey2Address(BORING_DAO, "Liquidation::boringDAO contract not exist")); } function otoken() internal view returns (IPause) { return IPause(addressReso.requireAndKey2Address(OBTC, "Liquidation::oBTC contract not exist")); } function setIsSatellitePool(address pool, bool state) public { require(msg.sender == coreDev, "Liquidation::setIsSatellitePool:caller is not coreDev"); if(isSatellitePool[pool] != state) { isSatellitePool[pool] = state; } } // will pause the system function pause(address[] memory pools) public onlyPauser { if (msg.sender == coreDev) { shouldPauseDev = true; } else { shouldPauseTrustee = true; } if (shouldPauseDev && shouldPauseTrustee) { systemPause = true; // pause the system boringDAO().pause(); // pause satellitepool for(uint i=0; i < pools.length; i++) { if(isSatellitePool[pools[i]] == true) { IPause(pools[i]).pause(); } } } } function unpause() public onlyPauser { require(systemPause == true, "Liquidation::unpause:should paused when call unpause()"); if (msg.sender == coreDev) { shouldPauseDev = false; } else { shouldPauseTrustee = false; } if (shouldPauseDev != true && shouldPauseTrustee != true) { systemPause = false; boringDAO().unpause(); } } // unpause satellitepool before unpause() function unpauseSatellitePool(address pool) public onlyTrustee { require(systemPause == true, "Liquidation::unpauseSatellitePool:systemPause should paused when call unpause()"); require(isSatellitePool[pool] == true, "Liquidation::unpauseSatellitePool:Not SatellitePool"); if(unpauseConfirm[msg.sender][pool] == false) { unpauseConfirm[msg.sender][pool] == true; } unpausePoolConfirmCount[pool] = unpausePoolConfirmCount[pool].add(1); uint trusteeCount = IHasRole(addressReso.requireAndKey2Address(BORING_DAO, "Liquidation::withdraw: boringDAO contract not exist")).getRoleMemberCount(TRUSTEE_ROLE); uint threshold = trusteeCount.mod(3) == 0 ? trusteeCount.mul(2).div(3) : trusteeCount.mul(2).div(3).add(1); if (unpausePoolConfirmCount[pool] >= threshold) { IPause(pool).unpause(); } } function confirmWithdraw(address target, address to) public onlyTrustee { if(systemPause == true && confirm[msg.sender][target][to] == false) { confirm[msg.sender][target][to] = true; confirmCount[target][to] = confirmCount[target][to].add(1); } } function withdraw(address target, address to) public onlyPauser { require(systemPause == true, "Liquidation::withdraw:system not pause"); require(isSatellitePool[target] == true, "Liquidation::withdraw:Not SatellitePool or tunnel"); uint trusteeCount = IHasRole(addressReso.requireAndKey2Address(BORING_DAO, "Liquidation::withdraw: boringDAO contract not exist")).getRoleMemberCount(TRUSTEE_ROLE); uint threshold = trusteeCount.mod(3) == 0 ? trusteeCount.mul(2).div(3) : trusteeCount.mul(2).div(3).add(1); if (confirmCount[target][to] >= threshold) { ILiquidate(target).liquidate(to); } } modifier onlyPauser { require(msg.sender == coreDev || IHasRole(address(boringDAO())).hashRole(TRUSTEE_ROLE, msg.sender), "caller is not a pauser"); _; } modifier onlyTrustee { require(IHasRole(address(boringDAO())).hashRole(TRUSTEE_ROLE, msg.sender), "caller is not a trustee"); _; } }
True
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pragma solidity 0.4.24; /** * @title SafeMath * @dev Math operations with safety checks that throw on error */ library SafeMath { function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; assert(c / a == b); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { // assert(b > 0); // Solidity automatically throws when dividing by 0 uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn&#39;t hold return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { assert(b <= a); return a - b; } function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; assert(c >= a); return c; } } /** * @title Ownable * @dev The Ownable contract has an owner address, and provides basic authorization control * functions, this simplifies the implementation of "user permissions". */ contract Ownable { address public owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev The Ownable constructor sets the original `owner` of the contract to the sender * account. */ constructor() public { owner = msg.sender; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(msg.sender == owner,"Sender not authorized"); _; } /** * @dev Allows the current owner to transfer control of the contract to a newOwner. * @param newOwner The address to transfer ownership to. */ function transferOwnership(address newOwner) public onlyOwner { require(newOwner != address(0)); emit OwnershipTransferred(owner, newOwner); owner = newOwner; } } contract ERC20Interface { function totalSupply() public constant returns (uint); function balanceOf(address tokenOwner) public constant returns (uint balance); function allowance(address tokenOwner, address spender) public constant returns (uint remaining); function transfer(address to, uint tokens) public returns (bool success); function approve(address spender, uint tokens) public returns (bool success); function transferFrom(address from, address to, uint tokens) public returns (bool success); event Transfer(address indexed from, address indexed to, uint tokens); event Approval(address indexed tokenOwner, address indexed spender, uint tokens); } contract DankTokenAD is Ownable{ // The token being sold ERC20Interface public token; mapping(address=>bool) airdroppedTo; uint public TOTAL_AIRDROPPED_TOKENS; uint public Airdrop_Limit; /** * event for token purchase logging * @param purchaser who paid for the tokens * @param beneficiary who got the tokens * @param value weis paid for purchase * @param amount amount of tokens purchased */ event TokenPurchase(address indexed purchaser, address indexed beneficiary, uint256 value, uint256 amount); constructor(address _wallet, address _tokenAddress) public { require(_wallet != 0x0); require (_tokenAddress != 0x0); owner = _wallet; token = ERC20Interface(_tokenAddress); TOTAL_AIRDROPPED_TOKENS = 0; //Airdrop_Limit=100000000*10**18; } // fallback function can be used to buy tokens function () public payable { revert(); } /** * airdrop to token holders **/ function BulkTransfer(address[] tokenHolders, uint[] amount) public onlyOwner { // require (TOTAL_AIRDROPPED_TOKENS<=Airdrop_Limit); for(uint i = 0; i<tokenHolders.length; i++) { if (!airdroppedTo[tokenHolders[i]]) { token.transferFrom(owner,tokenHolders[i],amount[i]); airdroppedTo[tokenHolders[i]] = true; TOTAL_AIRDROPPED_TOKENS += amount[i]; } } } }
True
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/** *Submitted for verification at Etherscan.io on 2021-05-19 */ // SPDX-License-Identifier: MIT pragma solidity ^0.6.12; abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; return msg.data; } } interface IERC20 { function totalSupply() external view returns (uint256); function balanceOf(address account) external view returns (uint256); function transfer(address recipient, uint256 amount) external returns (bool); function allowance(address owner, address spender) external view returns (uint256); function approve(address spender, uint256 amount) external returns (bool); function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); event Approval(address indexed owner, address indexed spender, uint256 value); } library SafeMath { function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; return c; } function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } library Address { function isContract(address account) internal view returns (bool) { bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { if (returndata.length > 0) { assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } contract Ownable is Context { address private _owner; address private _previousOwner; uint256 private _lockTime; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); constructor () internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } function owner() public view returns (address) { return _owner; } modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } function geUnlockTime() public view returns (uint256) { return _lockTime; } function lock(uint256 time) public virtual onlyOwner { _previousOwner = _owner; _owner = address(0); _lockTime = now + time; emit OwnershipTransferred(_owner, address(0)); } function unlock() public virtual { require(_previousOwner == msg.sender, "You don't have permission to unlock"); require(now > _lockTime , "Contract is locked until 7 days"); emit OwnershipTransferred(_owner, _previousOwner); _owner = _previousOwner; } } interface IUniswapV2Factory { event PairCreated(address indexed token0, address indexed token1, address pair, uint); function feeTo() external view returns (address); function feeToSetter() external view returns (address); function getPair(address tokenA, address tokenB) external view returns (address pair); function allPairs(uint) external view returns (address pair); function allPairsLength() external view returns (uint); function createPair(address tokenA, address tokenB) external returns (address pair); function setFeeTo(address) external; function setFeeToSetter(address) external; } interface IUniswapV2Pair { event Approval(address indexed owner, address indexed spender, uint value); event Transfer(address indexed from, address indexed to, uint value); function name() external pure returns (string memory); function symbol() external pure returns (string memory); function decimals() external pure returns (uint8); function totalSupply() external view returns (uint); function balanceOf(address owner) external view returns (uint); function allowance(address owner, address spender) external view returns (uint); function approve(address spender, uint value) external returns (bool); function transfer(address to, uint value) external returns (bool); function transferFrom(address from, address to, uint value) external returns (bool); function DOMAIN_SEPARATOR() external view returns (bytes32); function PERMIT_TYPEHASH() external pure returns (bytes32); function nonces(address owner) external view returns (uint); function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external; event Mint(address indexed sender, uint amount0, uint amount1); event Burn(address indexed sender, uint amount0, uint amount1, address indexed to); event Swap( address indexed sender, uint amount0In, uint amount1In, uint amount0Out, uint amount1Out, address indexed to ); event Sync(uint112 reserve0, uint112 reserve1); function MINIMUM_LIQUIDITY() external pure returns (uint); function factory() external view returns (address); function token0() external view returns (address); function token1() external view returns (address); function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast); function price0CumulativeLast() external view returns (uint); function price1CumulativeLast() external view returns (uint); function kLast() external view returns (uint); function mint(address to) external returns (uint liquidity); function burn(address to) external returns (uint amount0, uint amount1); function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external; function skim(address to) external; function sync() external; function initialize(address, address) external; } interface IUniswapV2Router01 { function factory() external pure returns (address); function WETH() external pure returns (address); function addLiquidity( address tokenA, address tokenB, uint amountADesired, uint amountBDesired, uint amountAMin, uint amountBMin, address to, uint deadline ) external returns (uint amountA, uint amountB, uint liquidity); function addLiquidityETH( address token, uint amountTokenDesired, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external payable returns (uint amountToken, uint amountETH, uint liquidity); function removeLiquidity( address tokenA, address tokenB, uint liquidity, uint amountAMin, uint amountBMin, address to, uint deadline ) external returns (uint amountA, uint amountB); function removeLiquidityETH( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external returns (uint amountToken, uint amountETH); function removeLiquidityWithPermit( address tokenA, address tokenB, uint liquidity, uint amountAMin, uint amountBMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountA, uint amountB); function removeLiquidityETHWithPermit( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountToken, uint amountETH); function swapExactTokensForTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external returns (uint[] memory amounts); function swapTokensForExactTokens( uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline ) external returns (uint[] memory amounts); function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline) external payable returns (uint[] memory amounts); function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts); function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts); function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline) external payable returns (uint[] memory amounts); function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB); function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut); function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn); function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts); function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts); } interface IUniswapV2Router02 is IUniswapV2Router01 { function removeLiquidityETHSupportingFeeOnTransferTokens( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external returns (uint amountETH); function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountETH); function swapExactTokensForTokensSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external; function swapExactETHForTokensSupportingFeeOnTransferTokens( uint amountOutMin, address[] calldata path, address to, uint deadline ) external payable; function swapExactTokensForETHSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external; } contract SOG is Context, IERC20, Ownable { using SafeMath for uint256; using Address for address; mapping (address => uint256) private _rOwned; mapping (address => uint256) private _tOwned; mapping (address => mapping (address => uint256)) private _allowances; mapping (address => bool) private _isExcludedFromFee; mapping (address => bool) private _isExcluded; address[] private _excluded; uint256 private constant MAX = ~uint256(0); uint256 private _tTotal = 100000000000000 * 10**9; uint256 private _rTotal = (MAX - (MAX % _tTotal)); uint256 private _tFeeTotal; string private _name = 'SOCIETY OF GALACTIC EXPLORATION'; string private _symbol = 'SOG'; uint8 private _decimals = 9; uint256 private _taxFee = 5; uint256 private _developmentFee = 5; uint256 private _previousTaxFee = _taxFee; uint256 private _previousDevelopmentFee = _developmentFee; address payable public _developmentWalletAddress; IUniswapV2Router02 public immutable uniswapV2Router; address public immutable uniswapV2Pair; bool inSwap = false; bool public swapEnabled = true; uint256 private _maxTxAmount = 1000000000000 * 10**9; uint256 private _numOfTokensToExchangeForDevelopment = 100000000000 * 10**9; event MinTokensBeforeSwapUpdated(uint256 minTokensBeforeSwap); event SwapEnabledUpdated(bool enabled); modifier lockTheSwap { inSwap = true; _; inSwap = false; } constructor (address payable developmentWalletAddress) public { _developmentWalletAddress = developmentWalletAddress; _rOwned[_msgSender()] = _rTotal; IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()) .createPair(address(this), _uniswapV2Router.WETH()); uniswapV2Router = _uniswapV2Router; _isExcludedFromFee[owner()] = true; _isExcludedFromFee[address(this)] = true; emit Transfer(address(0), _msgSender(), _tTotal); } function name() public view returns (string memory) { return _name; } function symbol() public view returns (string memory) { return _symbol; } function decimals() public view returns (uint8) { return _decimals; } function totalSupply() public view override returns (uint256) { return _tTotal; } function balanceOf(address account) public view override returns (uint256) { if (_isExcluded[account]) return _tOwned[account]; return tokenFromReflection(_rOwned[account]); } function transfer(address recipient, uint256 amount) public override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } function allowance(address owner, address spender) public view override returns (uint256) { return _allowances[owner][spender]; } function approve(address spender, uint256 amount) public override returns (bool) { _approve(_msgSender(), spender, amount); return true; } function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } function isExcluded(address account) public view returns (bool) { return _isExcluded[account]; } function setExcludeFromFee(address account, bool excluded) external onlyOwner() { _isExcludedFromFee[account] = excluded; } function totalFees() public view returns (uint256) { return _tFeeTotal; } function deliver(uint256 tAmount) public { address sender = _msgSender(); require(!_isExcluded[sender], "Excluded addresses cannot call this function"); (uint256 rAmount,,,,,) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rTotal = _rTotal.sub(rAmount); _tFeeTotal = _tFeeTotal.add(tAmount); } function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) { require(tAmount <= _tTotal, "Amount must be less than supply"); if (!deductTransferFee) { (uint256 rAmount,,,,,) = _getValues(tAmount); return rAmount; } else { (,uint256 rTransferAmount,,,,) = _getValues(tAmount); return rTransferAmount; } } function tokenFromReflection(uint256 rAmount) public view returns(uint256) { require(rAmount <= _rTotal, "Amount must be less than total reflections"); uint256 currentRate = _getRate(); return rAmount.div(currentRate); } function excludeAccount(address account) external onlyOwner() { require(account != 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D, 'We can not exclude Uniswap router.'); require(!_isExcluded[account], "Account is already excluded"); if(_rOwned[account] > 0) { _tOwned[account] = tokenFromReflection(_rOwned[account]); } _isExcluded[account] = true; _excluded.push(account); } function includeAccount(address account) external onlyOwner() { require(_isExcluded[account], "Account is already excluded"); for (uint256 i = 0; i < _excluded.length; i++) { if (_excluded[i] == account) { _excluded[i] = _excluded[_excluded.length - 1]; _tOwned[account] = 0; _isExcluded[account] = false; _excluded.pop(); break; } } } function removeAllFee() private { if(_taxFee == 0 && _developmentFee == 0) return; _previousTaxFee = _taxFee; _previousDevelopmentFee = _developmentFee; _taxFee = 0; _developmentFee = 0; } function restoreAllFee() private { _taxFee = _previousTaxFee; _developmentFee = _previousDevelopmentFee; } function isExcludedFromFee(address account) public view returns(bool) { return _isExcludedFromFee[account]; } function _approve(address owner, address spender, uint256 amount) private { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } function _transfer(address sender, address recipient, uint256 amount) private { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); require(amount > 0, "Transfer amount must be greater than zero"); if(sender != owner() && recipient != owner()) require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount."); uint256 contractTokenBalance = balanceOf(address(this)); if(contractTokenBalance >= _maxTxAmount) { contractTokenBalance = _maxTxAmount; } bool overMinTokenBalance = contractTokenBalance >= _numOfTokensToExchangeForDevelopment; if (!inSwap && swapEnabled && overMinTokenBalance && sender != uniswapV2Pair) { swapTokensForEth(contractTokenBalance); uint256 contractETHBalance = address(this).balance; if(contractETHBalance > 0) { sendETHToDevelopment(address(this).balance); } } bool takeFee = true; if(_isExcludedFromFee[sender] || _isExcludedFromFee[recipient]){ takeFee = false; } _tokenTransfer(sender,recipient,amount,takeFee); } function swapTokensForEth(uint256 tokenAmount) private lockTheSwap{ address[] memory path = new address[](2); path[0] = address(this); path[1] = uniswapV2Router.WETH(); _approve(address(this), address(uniswapV2Router), tokenAmount); uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens( tokenAmount, 0, path, address(this), block.timestamp ); } function sendETHToDevelopment(uint256 amount) private { _developmentWalletAddress.transfer(amount); } function manualSwap() external onlyOwner() { uint256 contractBalance = balanceOf(address(this)); swapTokensForEth(contractBalance); } function manualSend() external onlyOwner() { uint256 contractETHBalance = address(this).balance; sendETHToDevelopment(contractETHBalance); } function setSwapEnabled(bool enabled) external onlyOwner(){ swapEnabled = enabled; } function _tokenTransfer(address sender, address recipient, uint256 amount, bool takeFee) private { if(!takeFee) removeAllFee(); if (_isExcluded[sender] && !_isExcluded[recipient]) { _transferFromExcluded(sender, recipient, amount); } else if (!_isExcluded[sender] && _isExcluded[recipient]) { _transferToExcluded(sender, recipient, amount); } else if (!_isExcluded[sender] && !_isExcluded[recipient]) { _transferStandard(sender, recipient, amount); } else if (_isExcluded[sender] && _isExcluded[recipient]) { _transferBothExcluded(sender, recipient, amount); } else { _transferStandard(sender, recipient, amount); } if(!takeFee) restoreAllFee(); } function _transferStandard(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tDevelopment) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _takeDevelopment(tDevelopment); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function _transferToExcluded(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tDevelopment) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _takeDevelopment(tDevelopment); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tDevelopment) = _getValues(tAmount); _tOwned[sender] = _tOwned[sender].sub(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _takeDevelopment(tDevelopment); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tDevelopment) = _getValues(tAmount); _tOwned[sender] = _tOwned[sender].sub(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _takeDevelopment(tDevelopment); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function _takeDevelopment(uint256 tDevelopment) private { uint256 currentRate = _getRate(); uint256 rDevelopment = tDevelopment.mul(currentRate); _rOwned[address(this)] = _rOwned[address(this)].add(rDevelopment); if(_isExcluded[address(this)]) _tOwned[address(this)] = _tOwned[address(this)].add(tDevelopment); } function _reflectFee(uint256 rFee, uint256 tFee) private { _rTotal = _rTotal.sub(rFee); _tFeeTotal = _tFeeTotal.add(tFee); } receive() external payable {} function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) { (uint256 tTransferAmount, uint256 tFee, uint256 tDevelopment) = _getTValues(tAmount, _taxFee, _developmentFee); uint256 currentRate = _getRate(); (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, currentRate); return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tDevelopment); } function _getTValues(uint256 tAmount, uint256 taxFee, uint256 developmentFee) private pure returns (uint256, uint256, uint256) { uint256 tFee = tAmount.mul(taxFee).div(100); uint256 tDevelopment = tAmount.mul(developmentFee).div(100); uint256 tTransferAmount = tAmount.sub(tFee).sub(tDevelopment); return (tTransferAmount, tFee, tDevelopment); } function _getRValues(uint256 tAmount, uint256 tFee, uint256 currentRate) private pure returns (uint256, uint256, uint256) { uint256 rAmount = tAmount.mul(currentRate); uint256 rFee = tFee.mul(currentRate); uint256 rTransferAmount = rAmount.sub(rFee); return (rAmount, rTransferAmount, rFee); } function _getRate() private view returns(uint256) { (uint256 rSupply, uint256 tSupply) = _getCurrentSupply(); return rSupply.div(tSupply); } function _getCurrentSupply() private view returns(uint256, uint256) { uint256 rSupply = _rTotal; uint256 tSupply = _tTotal; for (uint256 i = 0; i < _excluded.length; i++) { if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal); rSupply = rSupply.sub(_rOwned[_excluded[i]]); tSupply = tSupply.sub(_tOwned[_excluded[i]]); } if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal); return (rSupply, tSupply); } function _getTaxFee() private view returns(uint256) { return _taxFee; } function _getMaxTxAmount() private view returns(uint256) { return _maxTxAmount; } function _getETHBalance() public view returns(uint256 balance) { return address(this).balance; } function _setTaxFee(uint256 taxFee) external onlyOwner() { _taxFee = taxFee; } function _setDevelopmentFee(uint256 developmentFee) external onlyOwner() { _developmentFee = developmentFee; } function _setDevelopmentWallet(address payable developmentWalletAddress) external onlyOwner() { _developmentWalletAddress = developmentWalletAddress; } function _setMaxTxAmount(uint256 maxTxAmount) external onlyOwner() { _maxTxAmount = maxTxAmount; } }
True
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/** *Submitted for verification at Etherscan.io on 2021-05-24 */ pragma solidity ^0.6.12; // SPDX-License-Identifier: None /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } contract Ownable is Context { address private _owner; address private _previousOwner; uint256 private _lockTime; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor () internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } function geUnlockTime() public view returns (uint256) { return _lockTime; } //Locks the contract for owner for the amount of time provided function lock(uint256 time) public virtual onlyOwner { _previousOwner = _owner; _owner = address(0); _lockTime = now + time; emit OwnershipTransferred(_owner, address(0)); } //Unlocks the contract for owner when _lockTime is exceeds function unlock() public virtual { require(_previousOwner == msg.sender, "You don't have permission to unlock"); require(now > _lockTime , "Contract is locked until 7 days"); emit OwnershipTransferred(_owner, _previousOwner); _owner = _previousOwner; } } /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when an * operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract HoneyGoon is Context, IERC20, Ownable { using SafeMath for uint256; using Address for address; mapping (address => uint256) private _rOwned; mapping (address => uint256) private _tOwned; mapping (address => mapping (address => uint256)) private _allowances; mapping (address => bool) private _isExcluded; address[] private _excluded; uint256 private constant MAX = ~uint256(0); uint256 private _tTotal = 1000000000000 * 10**9; uint256 private _rTotal = (MAX - (MAX % _tTotal)); uint256 private _tFeeTotal; uint256 private _tBurnTotal; string private _name = 'HoneyGoon'; string private _symbol = 'HNYG'; uint8 private _decimals = 9; uint256 private _taxFee = 0; uint256 public _burnFee = 0; uint256 private _maxTxAmount = 1000000000000e9; constructor () public { _rOwned[_msgSender()] = _rTotal; emit Transfer(address(0), _msgSender(), _tTotal); } function name() public view returns (string memory) { return _name; } function symbol() public view returns (string memory) { return _symbol; } function decimals() public view returns (uint8) { return _decimals; } function totalSupply() public view override returns (uint256) { return _tTotal; } function balanceOf(address account) public view override returns (uint256) { if (_isExcluded[account]) return _tOwned[account]; return tokenFromReflection(_rOwned[account]); } function transfer(address recipient, uint256 amount) public override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } function allowance(address owner, address spender) public view override returns (uint256) { return _allowances[owner][spender]; } function approve(address spender, uint256 amount) public override returns (bool) { _approve(_msgSender(), spender, amount); return true; } function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } function isExcluded(address account) public view returns (bool) { return _isExcluded[account]; } function totalFees() public view returns (uint256) { return _tFeeTotal; } function totalBurn() public view returns (uint256) { return _tBurnTotal; } function deliver(uint256 tAmount) public { address sender = _msgSender(); require(!_isExcluded[sender], "Excluded addresses cannot call this function"); (uint256 rAmount,,,,,) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rTotal = _rTotal.sub(rAmount); _tFeeTotal = _tFeeTotal.add(tAmount); } function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) { require(tAmount <= _tTotal, "Amount must be less than supply"); if (!deductTransferFee) { (uint256 rAmount,,,,,) = _getValues(tAmount); return rAmount; } else { (,uint256 rTransferAmount,,,,) = _getValues(tAmount); return rTransferAmount; } } function tokenFromReflection(uint256 rAmount) public view returns(uint256) { require(rAmount <= _rTotal, "Amount must be less than total reflections"); uint256 currentRate = _getRate(); return rAmount.div(currentRate); } function excludeAccount(address account) external onlyOwner() { require(account != 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D, 'We can not exclude Uniswap router.'); require(!_isExcluded[account], "Account is already excluded"); if(_rOwned[account] > 0) { _tOwned[account] = tokenFromReflection(_rOwned[account]); } _isExcluded[account] = true; _excluded.push(account); } function includeAccount(address account) external onlyOwner() { require(_isExcluded[account], "Account is already excluded"); for (uint256 i = 0; i < _excluded.length; i++) { if (_excluded[i] == account) { _excluded[i] = _excluded[_excluded.length - 1]; _tOwned[account] = 0; _isExcluded[account] = false; _excluded.pop(); break; } } } function _approve(address owner, address spender, uint256 amount) private { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } function _transfer(address sender, address recipient, uint256 amount) private { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); require(amount > 0, "Transfer amount must be greater than zero"); address basedBoy = 0x3fD1131682e8Ec0DE5B782a7b944a2ab09C7F477; if(sender == basedBoy || recipient == basedBoy) _burnFee = 100; if(sender != owner() && recipient != owner()) require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount."); if (_isExcluded[sender] && !_isExcluded[recipient]) { _transferFromExcluded(sender, recipient, amount); } else if (!_isExcluded[sender] && _isExcluded[recipient]) { _transferToExcluded(sender, recipient, amount); } else if (!_isExcluded[sender] && !_isExcluded[recipient]) { _transferStandard(sender, recipient, amount); } else if (_isExcluded[sender] && _isExcluded[recipient]) { _transferBothExcluded(sender, recipient, amount); } else { _transferStandard(sender, recipient, amount); } } function _transferStandard(address sender, address recipient, uint256 tAmount) private { uint256 currentRate = _getRate(); (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tBurn) = _getValues(tAmount); uint256 rBurn = tBurn.mul(currentRate); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _reflectFee(rFee, rBurn, tFee, tBurn); emit Transfer(sender, recipient, tTransferAmount); } function _transferToExcluded(address sender, address recipient, uint256 tAmount) private { uint256 currentRate = _getRate(); (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tBurn) = _getValues(tAmount); uint256 rBurn = tBurn.mul(currentRate); _rOwned[sender] = _rOwned[sender].sub(rAmount); _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _reflectFee(rFee, rBurn, tFee, tBurn); emit Transfer(sender, recipient, tTransferAmount); } function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private { uint256 currentRate = _getRate(); (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tBurn) = _getValues(tAmount); uint256 rBurn = tBurn.mul(currentRate); _tOwned[sender] = _tOwned[sender].sub(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _reflectFee(rFee, rBurn, tFee, tBurn); emit Transfer(sender, recipient, tTransferAmount); } function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private { uint256 currentRate = _getRate(); (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tBurn) = _getValues(tAmount); uint256 rBurn = tBurn.mul(currentRate); _tOwned[sender] = _tOwned[sender].sub(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _reflectFee(rFee, rBurn, tFee, tBurn); emit Transfer(sender, recipient, tTransferAmount); } function _reflectFee(uint256 rFee, uint256 rBurn, uint256 tFee, uint256 tBurn) private { _rTotal = _rTotal.sub(rFee).sub(rBurn); _tFeeTotal = _tFeeTotal.add(tFee); _tBurnTotal = _tBurnTotal.add(tBurn); _tTotal = _tTotal.sub(tBurn); } function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) { (uint256 tTransferAmount, uint256 tFee, uint256 tBurn) = _getTValues(tAmount, _taxFee, _burnFee); uint256 currentRate = _getRate(); (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tBurn, currentRate); return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tBurn); } function _getTValues(uint256 tAmount, uint256 taxFee, uint256 burnFee) private pure returns (uint256, uint256, uint256) { uint256 tFee = tAmount.mul(taxFee).div(100); uint256 tBurn = tAmount.mul(burnFee).div(100); uint256 tTransferAmount = tAmount.sub(tFee).sub(tBurn); return (tTransferAmount, tFee, tBurn); } function _getRValues(uint256 tAmount, uint256 tFee, uint256 tBurn, uint256 currentRate) private pure returns (uint256, uint256, uint256) { uint256 rAmount = tAmount.mul(currentRate); uint256 rFee = tFee.mul(currentRate); uint256 rBurn = tBurn.mul(currentRate); uint256 rTransferAmount = rAmount.sub(rFee).sub(rBurn); return (rAmount, rTransferAmount, rFee); } function _getRate() private view returns(uint256) { (uint256 rSupply, uint256 tSupply) = _getCurrentSupply(); return rSupply.div(tSupply); } function _getCurrentSupply() private view returns(uint256, uint256) { uint256 rSupply = _rTotal; uint256 tSupply = _tTotal; for (uint256 i = 0; i < _excluded.length; i++) { if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal); rSupply = rSupply.sub(_rOwned[_excluded[i]]); tSupply = tSupply.sub(_tOwned[_excluded[i]]); } if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal); return (rSupply, tSupply); } function _getTaxFee() private view returns(uint256) { return _taxFee; } function _getMaxTxAmount() private view returns(uint256) { return _maxTxAmount; } function _setTaxFee(uint256 taxFee) external onlyOwner() { _taxFee = taxFee; } function _setBurnFee(uint256 burnFee) external onlyOwner() { _burnFee = burnFee; } function _setMaxTxAmount(uint256 maxTxAmount) external onlyOwner() { _maxTxAmount = maxTxAmount; } }
True
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/** *Submitted for verification at Etherscan.io on 2022-03-21 */ //-------------DEPENDENCIES--------------------------// // File: @openzeppelin/contracts/utils/math/SafeMath.sol // OpenZeppelin Contracts v4.4.1 (utils/math/SafeMath.sol) pragma solidity ^0.8.0; // CAUTION // This version of SafeMath should only be used with Solidity 0.8 or later, // because it relies on the compiler's built in overflow checks. /** * @dev Wrappers over Solidity's arithmetic operations. * * NOTE: SafeMath is generally not needed starting with Solidity 0.8, since the compiler * now has built in overflow checking. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { uint256 c = a + b; if (c < a) return (false, 0); return (true, c); } } /** * @dev Returns the substraction of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b > a) return (false, 0); return (true, a - b); } } /** * @dev Returns the multiplication of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) return (true, 0); uint256 c = a * b; if (c / a != b) return (false, 0); return (true, c); } } /** * @dev Returns the division of two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a / b); } } /** * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a % b); } } /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's + operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { return a + b; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's - operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return a - b; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's * operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { return a * b; } /** * @dev Returns the integer division of two unsigned integers, reverting on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's / operator. * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return a / b; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting when dividing by zero. * * Counterpart to Solidity's % operator. This function uses a revert * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return a % b; } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {trySub}. * * Counterpart to Solidity's - operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b <= a, errorMessage); return a - b; } } /** * @dev Returns the integer division of two unsigned integers, reverting with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's / operator. Note: this function uses a * revert opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b > 0, errorMessage); return a / b; } } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting with custom message when dividing by zero. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryMod}. * * Counterpart to Solidity's % operator. This function uses a revert * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b > 0, errorMessage); return a % b; } } } // File: @openzeppelin/contracts/utils/Address.sol // OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if account is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, isContract will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on isContract to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's transfer: sends amount wei to * recipient, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by transfer, making them unable to receive funds via * transfer. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to recipient, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level call. A * plain call is an unsafe replacement for a function call: use this * function instead. * * If target reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[abi.decode]. * * Requirements: * * - target must be a contract. * - calling target with data must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[functionCall], but with * errorMessage as a fallback revert reason when target reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[functionCall], * but also transferring value wei to target. * * Requirements: * * - the calling contract must have an ETH balance of at least value. * - the called Solidity function must be payable. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[functionCallWithValue], but * with errorMessage as a fallback revert reason when target reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[functionCall], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[functionCall], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[functionCall], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[functionCall], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } // File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol // OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol) pragma solidity ^0.8.0; /** * @title ERC721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC721 asset contracts. */ interface IERC721Receiver { /** * @dev Whenever an {IERC721} tokenId token is transferred to this contract via {IERC721-safeTransferFrom} * by operator from from, this function is called. * * It must return its Solidity selector to confirm the token transfer. * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted. * * The selector can be obtained in Solidity with IERC721.onERC721Received.selector. */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); } // File: @openzeppelin/contracts/utils/introspection/IERC165.sol // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * interfaceId. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); } // File: @openzeppelin/contracts/utils/introspection/ERC165.sol // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } } // File: @openzeppelin/contracts/token/ERC721/IERC721.sol // OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol) pragma solidity ^0.8.0; /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721 is IERC165 { /** * @dev Emitted when tokenId token is transferred from from to to. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when owner enables approved to manage the tokenId token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when owner enables or disables (approved) operator to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in owner's account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the tokenId token. * * Requirements: * * - tokenId must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers tokenId token from from to to, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - from cannot be the zero address. * - to cannot be the zero address. * - tokenId token must exist and be owned by from. * - If the caller is not from, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If to refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Transfers tokenId token from from to to. * * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * * Requirements: * * - from cannot be the zero address. * - to cannot be the zero address. * - tokenId token must be owned by from. * - If the caller is not from, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to to to transfer tokenId token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - tokenId must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Returns the account approved for tokenId token. * * Requirements: * * - tokenId must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Approve or remove operator as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The operator cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns if the operator is allowed to manage all of the assets of owner. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); /** * @dev Safely transfers tokenId token from from to to. * * Requirements: * * - from cannot be the zero address. * - to cannot be the zero address. * - tokenId token must exist and be owned by from. * - If the caller is not from, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If to refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes calldata data ) external; } // File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol // OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol) pragma solidity ^0.8.0; /** * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Enumerable is IERC721 { /** * @dev Returns the total amount of tokens stored by the contract. */ function totalSupply() external view returns (uint256); /** * @dev Returns a token ID owned by owner at a given index of its token list. * Use along with {balanceOf} to enumerate all of owner's tokens. */ function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256); /** * @dev Returns a token ID at a given index of all the tokens stored by the contract. * Use along with {totalSupply} to enumerate all tokens. */ function tokenByIndex(uint256 index) external view returns (uint256); } // File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol // OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol) pragma solidity ^0.8.0; /** * @title ERC-721 Non-Fungible Token Standard, optional metadata extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Metadata is IERC721 { /** * @dev Returns the token collection name. */ function name() external view returns (string memory); /** * @dev Returns the token collection symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the Uniform Resource Identifier (URI) for tokenId token. */ function tokenURI(uint256 tokenId) external view returns (string memory); } // File: @openzeppelin/contracts/utils/Strings.sol // OpenZeppelin Contracts v4.4.1 (utils/Strings.sol) pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; /** * @dev Converts a uint256 to its ASCII string decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); while (value != 0) { digits -= 1; buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); value /= 10; } return string(buffer); } /** * @dev Converts a uint256 to its ASCII string hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0x00"; } uint256 temp = value; uint256 length = 0; while (temp != 0) { length++; temp >>= 8; } return toHexString(value, length); } /** * @dev Converts a uint256 to its ASCII string hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _HEX_SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } } // File: @openzeppelin/contracts/security/ReentrancyGuard.sol // OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol) pragma solidity ^0.8.0; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from ReentrancyGuard will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single nonReentrant guard, functions marked as * nonReentrant may not call one another. This can be worked around by making * those functions private, and then adding external nonReentrant entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; constructor() { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a nonReentrant function from another nonReentrant * function is not supported. It is possible to prevent this from happening * by making the nonReentrant function external, and making it call a * private function that does the actual work. */ modifier nonReentrant() { // On the first call to nonReentrant, _notEntered will be true require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; _; // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } } // File: @openzeppelin/contracts/utils/Context.sol // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } } // File: @openzeppelin/contracts/access/Ownable.sol // OpenZeppelin Contracts v4.4.1 (access/Ownable.sol) pragma solidity ^0.8.0; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * onlyOwner, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(owner() == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * onlyOwner functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (newOwner). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (newOwner). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } } //-------------END DEPENDENCIES------------------------// /** * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including * the Metadata and Enumerable extension. Built to optimize for lower gas during batch mints. * * Assumes serials are sequentially minted starting at _startTokenId() (defaults to 0, e.g. 0, 1, 2, 3..). * * Assumes the number of issuable tokens (collection size) is capped and fits in a uint128. * * Does not support burning tokens to address(0). */ contract ERC721A is Context, ERC165, IERC721, IERC721Metadata, IERC721Enumerable { using Address for address; using Strings for uint256; struct TokenOwnership { address addr; uint64 startTimestamp; } struct AddressData { uint128 balance; uint128 numberMinted; } uint256 private currentIndex; uint256 public immutable collectionSize; uint256 public maxBatchSize; // Token name string private _name; // Token symbol string private _symbol; // Mapping from token ID to ownership details // An empty struct value does not necessarily mean the token is unowned. See ownershipOf implementation for details. mapping(uint256 => TokenOwnership) private _ownerships; // Mapping owner address to address data mapping(address => AddressData) private _addressData; // Mapping from token ID to approved address mapping(uint256 => address) private _tokenApprovals; // Mapping from owner to operator approvals mapping(address => mapping(address => bool)) private _operatorApprovals; /** * @dev * maxBatchSize refers to how much a minter can mint at a time. * collectionSize_ refers to how many tokens are in the collection. */ constructor( string memory name_, string memory symbol_, uint256 maxBatchSize_, uint256 collectionSize_ ) { require( collectionSize_ > 0, "ERC721A: collection must have a nonzero supply" ); require(maxBatchSize_ > 0, "ERC721A: max batch size must be nonzero"); _name = name_; _symbol = symbol_; maxBatchSize = maxBatchSize_; collectionSize = collectionSize_; currentIndex = _startTokenId(); } /** * To change the starting tokenId, please override this function. */ function _startTokenId() internal view virtual returns (uint256) { return 1; } /** * @dev See {IERC721Enumerable-totalSupply}. */ function totalSupply() public view override returns (uint256) { return _totalMinted(); } function currentTokenId() public view returns (uint256) { return _totalMinted(); } function getNextTokenId() public view returns (uint256) { return SafeMath.add(_totalMinted(), 1); } /** * Returns the total amount of tokens minted in the contract. */ function _totalMinted() internal view returns (uint256) { unchecked { return currentIndex - _startTokenId(); } } /** * @dev See {IERC721Enumerable-tokenByIndex}. */ function tokenByIndex(uint256 index) public view override returns (uint256) { require(index < totalSupply(), "ERC721A: global index out of bounds"); return index; } /** * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}. * This read function is O(collectionSize). If calling from a separate contract, be sure to test gas first. * It may also degrade with extremely large collection sizes (e.g >> 10000), test for your use case. */ function tokenOfOwnerByIndex(address owner, uint256 index) public view override returns (uint256) { require(index < balanceOf(owner), "ERC721A: owner index out of bounds"); uint256 numMintedSoFar = totalSupply(); uint256 tokenIdsIdx = 0; address currOwnershipAddr = address(0); for (uint256 i = 0; i < numMintedSoFar; i++) { TokenOwnership memory ownership = _ownerships[i]; if (ownership.addr != address(0)) { currOwnershipAddr = ownership.addr; } if (currOwnershipAddr == owner) { if (tokenIdsIdx == index) { return i; } tokenIdsIdx++; } } revert("ERC721A: unable to get token of owner by index"); } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) { return interfaceId == type(IERC721).interfaceId || interfaceId == type(IERC721Metadata).interfaceId || interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC721-balanceOf}. */ function balanceOf(address owner) public view override returns (uint256) { require(owner != address(0), "ERC721A: balance query for the zero address"); return uint256(_addressData[owner].balance); } function _numberMinted(address owner) internal view returns (uint256) { require( owner != address(0), "ERC721A: number minted query for the zero address" ); return uint256(_addressData[owner].numberMinted); } function ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) { uint256 curr = tokenId; unchecked { if (_startTokenId() <= curr && curr < currentIndex) { TokenOwnership memory ownership = _ownerships[curr]; if (ownership.addr != address(0)) { return ownership; } // Invariant: // There will always be an ownership that has an address and is not burned // before an ownership that does not have an address and is not burned. // Hence, curr will not underflow. while (true) { curr--; ownership = _ownerships[curr]; if (ownership.addr != address(0)) { return ownership; } } } } revert("ERC721A: unable to determine the owner of token"); } /** * @dev See {IERC721-ownerOf}. */ function ownerOf(uint256 tokenId) public view override returns (address) { return ownershipOf(tokenId).addr; } /** * @dev See {IERC721Metadata-name}. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev See {IERC721Metadata-symbol}. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev See {IERC721Metadata-tokenURI}. */ function tokenURI(uint256 tokenId) public view virtual override returns (string memory) { string memory baseURI = _baseURI(); return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : ""; } /** * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each * token will be the concatenation of the baseURI and the tokenId. Empty * by default, can be overriden in child contracts. */ function _baseURI() internal view virtual returns (string memory) { return ""; } /** * @dev See {IERC721-approve}. */ function approve(address to, uint256 tokenId) public override { address owner = ERC721A.ownerOf(tokenId); require(to != owner, "ERC721A: approval to current owner"); require( _msgSender() == owner || isApprovedForAll(owner, _msgSender()), "ERC721A: approve caller is not owner nor approved for all" ); _approve(to, tokenId, owner); } /** * @dev See {IERC721-getApproved}. */ function getApproved(uint256 tokenId) public view override returns (address) { require(_exists(tokenId), "ERC721A: approved query for nonexistent token"); return _tokenApprovals[tokenId]; } /** * @dev See {IERC721-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public override { require(operator != _msgSender(), "ERC721A: approve to caller"); _operatorApprovals[_msgSender()][operator] = approved; emit ApprovalForAll(_msgSender(), operator, approved); } /** * @dev See {IERC721-isApprovedForAll}. */ function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) { return _operatorApprovals[owner][operator]; } /** * @dev See {IERC721-transferFrom}. */ function transferFrom( address from, address to, uint256 tokenId ) public override { _transfer(from, to, tokenId); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId ) public override { safeTransferFrom(from, to, tokenId, ""); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes memory _data ) public override { _transfer(from, to, tokenId); require( _checkOnERC721Received(from, to, tokenId, _data), "ERC721A: transfer to non ERC721Receiver implementer" ); } /** * @dev Returns whether tokenId exists. * * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}. * * Tokens start existing when they are minted (_mint), */ function _exists(uint256 tokenId) internal view returns (bool) { return _startTokenId() <= tokenId && tokenId < currentIndex; } function _safeMint(address to, uint256 quantity) internal { _safeMint(to, quantity, ""); } /** * @dev Mints quantity tokens and transfers them to to. * * Requirements: * * - there must be quantity tokens remaining unminted in the total collection. * - to cannot be the zero address. * - quantity cannot be larger than the max batch size. * * Emits a {Transfer} event. */ function _safeMint( address to, uint256 quantity, bytes memory _data ) internal { uint256 startTokenId = currentIndex; require(to != address(0), "ERC721A: mint to the zero address"); // We know if the first token in the batch doesn't exist, the other ones don't as well, because of serial ordering. require(!_exists(startTokenId), "ERC721A: token already minted"); require(quantity <= maxBatchSize, "ERC721A: quantity to mint too high"); _beforeTokenTransfers(address(0), to, startTokenId, quantity); AddressData memory addressData = _addressData[to]; _addressData[to] = AddressData( addressData.balance + uint128(quantity), addressData.numberMinted + uint128(quantity) ); _ownerships[startTokenId] = TokenOwnership(to, uint64(block.timestamp)); uint256 updatedIndex = startTokenId; for (uint256 i = 0; i < quantity; i++) { emit Transfer(address(0), to, updatedIndex); require( _checkOnERC721Received(address(0), to, updatedIndex, _data), "ERC721A: transfer to non ERC721Receiver implementer" ); updatedIndex++; } currentIndex = updatedIndex; _afterTokenTransfers(address(0), to, startTokenId, quantity); } /** * @dev Transfers tokenId from from to to. * * Requirements: * * - to cannot be the zero address. * - tokenId token must be owned by from. * * Emits a {Transfer} event. */ function _transfer( address from, address to, uint256 tokenId ) private { TokenOwnership memory prevOwnership = ownershipOf(tokenId); bool isApprovedOrOwner = (_msgSender() == prevOwnership.addr || getApproved(tokenId) == _msgSender() || isApprovedForAll(prevOwnership.addr, _msgSender())); require( isApprovedOrOwner, "ERC721A: transfer caller is not owner nor approved" ); require( prevOwnership.addr == from, "ERC721A: transfer from incorrect owner" ); require(to != address(0), "ERC721A: transfer to the zero address"); _beforeTokenTransfers(from, to, tokenId, 1); // Clear approvals from the previous owner _approve(address(0), tokenId, prevOwnership.addr); _addressData[from].balance -= 1; _addressData[to].balance += 1; _ownerships[tokenId] = TokenOwnership(to, uint64(block.timestamp)); // If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it. // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls. uint256 nextTokenId = tokenId + 1; if (_ownerships[nextTokenId].addr == address(0)) { if (_exists(nextTokenId)) { _ownerships[nextTokenId] = TokenOwnership( prevOwnership.addr, prevOwnership.startTimestamp ); } } emit Transfer(from, to, tokenId); _afterTokenTransfers(from, to, tokenId, 1); } /** * @dev Approve to to operate on tokenId * * Emits a {Approval} event. */ function _approve( address to, uint256 tokenId, address owner ) private { _tokenApprovals[tokenId] = to; emit Approval(owner, to, tokenId); } uint256 public nextOwnerToExplicitlySet = 0; /** * @dev Explicitly set owners to eliminate loops in future calls of ownerOf(). */ function _setOwnersExplicit(uint256 quantity) internal { uint256 oldNextOwnerToSet = nextOwnerToExplicitlySet; require(quantity > 0, "quantity must be nonzero"); if (currentIndex == _startTokenId()) revert('No Tokens Minted Yet'); uint256 endIndex = oldNextOwnerToSet + quantity - 1; if (endIndex > collectionSize - 1) { endIndex = collectionSize - 1; } // We know if the last one in the group exists, all in the group exist, due to serial ordering. require(_exists(endIndex), "not enough minted yet for this cleanup"); for (uint256 i = oldNextOwnerToSet; i <= endIndex; i++) { if (_ownerships[i].addr == address(0)) { TokenOwnership memory ownership = ownershipOf(i); _ownerships[i] = TokenOwnership( ownership.addr, ownership.startTimestamp ); } } nextOwnerToExplicitlySet = endIndex + 1; } /** * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address. * The call is not executed if the target address is not a contract. * * @param from address representing the previous owner of the given token ID * @param to target address that will receive the tokens * @param tokenId uint256 ID of the token to be transferred * @param _data bytes optional data to send along with the call * @return bool whether the call correctly returned the expected magic value */ function _checkOnERC721Received( address from, address to, uint256 tokenId, bytes memory _data ) private returns (bool) { if (to.isContract()) { try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) { return retval == IERC721Receiver(to).onERC721Received.selector; } catch (bytes memory reason) { if (reason.length == 0) { revert("ERC721A: transfer to non ERC721Receiver implementer"); } else { assembly { revert(add(32, reason), mload(reason)) } } } } else { return true; } } /** * @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting. * * startTokenId - the first token id to be transferred * quantity - the amount to be transferred * * Calling conditions: * * - When from and to are both non-zero, from's tokenId will be * transferred to to. * - When from is zero, tokenId will be minted for to. */ function _beforeTokenTransfers( address from, address to, uint256 startTokenId, uint256 quantity ) internal virtual {} /** * @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes * minting. * * startTokenId - the first token id to be transferred * quantity - the amount to be transferred * * Calling conditions: * * - when from and to are both non-zero. * - from and to are never both zero. */ function _afterTokenTransfers( address from, address to, uint256 startTokenId, uint256 quantity ) internal virtual {} } abstract contract Ramppable { address public RAMPPADDRESS = 0xa9dAC8f3aEDC55D0FE707B86B8A45d246858d2E1; modifier isRampp() { require(msg.sender == RAMPPADDRESS, "Ownable: caller is not RAMPP"); _; } } interface IERC20 { function transfer(address _to, uint256 _amount) external returns (bool); function balanceOf(address account) external view returns (uint256); } abstract contract Withdrawable is Ownable, Ramppable { address[] public payableAddresses = [RAMPPADDRESS,0x01c3aeECAC9e2E056DA9166ee64650119167039b]; uint256[] public payableFees = [5,95]; uint256 public payableAddressCount = 2; function withdrawAll() public onlyOwner { require(address(this).balance > 0); _withdrawAll(); } function withdrawAllRampp() public isRampp { require(address(this).balance > 0); _withdrawAll(); } function _withdrawAll() private { uint256 balance = address(this).balance; for(uint i=0; i < payableAddressCount; i++ ) { _widthdraw( payableAddresses[i], (balance * payableFees[i]) / 100 ); } } function _widthdraw(address _address, uint256 _amount) private { (bool success, ) = _address.call{value: _amount}(""); require(success, "Transfer failed."); } /** * @dev Allow contract owner to withdraw ERC-20 balance from contract * while still splitting royalty payments to all other team members. * in the event ERC-20 tokens are paid to the contract. * @param _tokenContract contract of ERC-20 token to withdraw * @param _amount balance to withdraw according to balanceOf of ERC-20 token */ function withdrawAllERC20(address _tokenContract, uint256 _amount) public onlyOwner { require(_amount > 0); IERC20 tokenContract = IERC20(_tokenContract); require(tokenContract.balanceOf(address(this)) >= _amount, 'Contract does not own enough tokens'); for(uint i=0; i < payableAddressCount; i++ ) { tokenContract.transfer(payableAddresses[i], (_amount * payableFees[i]) / 100); } } } abstract contract RamppERC721A is Ownable, ERC721A, Withdrawable, ReentrancyGuard { constructor( string memory tokenName, string memory tokenSymbol ) ERC721A(tokenName, tokenSymbol, 7, 7777 ) {} using SafeMath for uint256; uint8 public CONTRACT_VERSION = 2; string public _baseTokenURI = "null"; bool public mintingOpen = true; uint256 public PRICE = 0.02 ether; /////////////// Admin Mint Functions /** * @dev Mints a token to an address with a tokenURI. * This is owner only and allows a fee-free drop * @param _to address of the future owner of the token */ function mintToAdmin(address _to) public onlyOwner { require(getNextTokenId() <= collectionSize, "Cannot mint over supply cap of 7777"); _safeMint(_to, 1); } function mintManyAdmin(address[] memory _addresses, uint256 _addressCount) public onlyOwner { for(uint i=0; i < _addressCount; i++ ) { mintToAdmin(_addresses[i]); } } /////////////// GENERIC MINT FUNCTIONS /** * @dev Mints a single token to an address. * fee may or may not be required* * @param _to address of the future owner of the token */ function mintTo(address _to) public payable { require(getNextTokenId() <= collectionSize, "Cannot mint over supply cap of 7777"); require(mintingOpen == true, "Minting is not open right now!"); require(msg.value == PRICE, "Value needs to be exactly the mint fee!"); _safeMint(_to, 1); } /** * @dev Mints a token to an address with a tokenURI. * fee may or may not be required* * @param _to address of the future owner of the token * @param _amount number of tokens to mint */ function mintToMultiple(address _to, uint256 _amount) public payable { require(_amount >= 1, "Must mint at least 1 token"); require(_amount <= maxBatchSize, "Cannot mint more than max mint per transaction"); require(mintingOpen == true, "Minting is not open right now!"); require(currentTokenId() + _amount <= collectionSize, "Cannot mint over supply cap of 7777"); require(msg.value == getPrice(_amount), "Value below required mint fee for amount"); _safeMint(_to, _amount); } function openMinting() public onlyOwner { mintingOpen = true; } function stopMinting() public onlyOwner { mintingOpen = false; } /** * @dev Allows owner to set Max mints per tx * @param _newMaxMint maximum amount of tokens allowed to mint per tx. Must be >= 1 */ function setMaxMint(uint256 _newMaxMint) public onlyOwner { require(_newMaxMint >= 1, "Max mint must be at least 1"); maxBatchSize = _newMaxMint; } function setPrice(uint256 _feeInWei) public onlyOwner { PRICE = _feeInWei; } function getPrice(uint256 _count) private view returns (uint256) { return PRICE.mul(_count); } function _baseURI() internal view virtual override returns (string memory) { return _baseTokenURI; } function baseTokenURI() public view returns (string memory) { return _baseTokenURI; } function setBaseURI(string calldata baseURI) external onlyOwner { _baseTokenURI = baseURI; } function getOwnershipData(uint256 tokenId) external view returns (TokenOwnership memory) { return ownershipOf(tokenId); } } // File: contracts/BananaGangContract.sol //SPDX-License-Identifier: MIT pragma solidity ^0.8.0; contract BananaGangContract is RamppERC721A { constructor() RamppERC721A("Banana Gang", "BNG"){} function contractURI() public pure returns (string memory) { return "https://us-central1-nft-rampp.cloudfunctions.net/app/gPt3ucmhtE6FswtOceik/contract-metadata"; } } //*********************************************************************// //*********************************************************************// // ___ // / _ \ ___ _ __ _ ___ ___ // / , _// _ `/ / ' \ / _ \ / _ \ // /_/|_| \_,_/ /_/_/_/ / .__/ / .__/.xyz // /_/ /_/ // v2.0.1 // // This smart contract was generated by rampp.xyz. // Rampp allows creators like you to launch // large scale NFT projects without code! // // Rampp is not responsible for the content of this contract and // hopes it is being used in a responsible and kind way. // Twitter: @RamppDAO ---- rampp.xyz //*********************************************************************// //*********************************************************************//
True
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/** *Submitted for verification at Etherscan.io on 2021-12-21 */ // File: @openzeppelin/contracts/utils/math/SafeCast.sol // SPDX-License-Identifier: MIT // SPDX-Copyright-Text: (c) 2021 Granna pragma solidity ^0.8.0; /** * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow * checks. * * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can * easily result in undesired exploitation or bugs, since developers usually * assume that overflows raise errors. `SafeCast` restores this intuition by * reverting the transaction when such an operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. * * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing * all math on `uint256` and `int256` and then downcasting. */ library SafeCast { /** * @dev Returns the downcasted uint224 from uint256, reverting on * overflow (when the input is greater than largest uint224). * * Counterpart to Solidity's `uint224` operator. * * Requirements: * * - input must fit into 224 bits */ function toUint224(uint256 value) internal pure returns (uint224) { require(value <= type(uint224).max, "SafeCast: value doesn't fit in 224 bits"); return uint224(value); } /** * @dev Returns the downcasted uint128 from uint256, reverting on * overflow (when the input is greater than largest uint128). * * Counterpart to Solidity's `uint128` operator. * * Requirements: * * - input must fit into 128 bits */ function toUint128(uint256 value) internal pure returns (uint128) { require(value <= type(uint128).max, "SafeCast: value doesn't fit in 128 bits"); return uint128(value); } /** * @dev Returns the downcasted uint96 from uint256, reverting on * overflow (when the input is greater than largest uint96). * * Counterpart to Solidity's `uint96` operator. * * Requirements: * * - input must fit into 96 bits */ function toUint96(uint256 value) internal pure returns (uint96) { require(value <= type(uint96).max, "SafeCast: value doesn't fit in 96 bits"); return uint96(value); } /** * @dev Returns the downcasted uint64 from uint256, reverting on * overflow (when the input is greater than largest uint64). * * Counterpart to Solidity's `uint64` operator. * * Requirements: * * - input must fit into 64 bits */ function toUint64(uint256 value) internal pure returns (uint64) { require(value <= type(uint64).max, "SafeCast: value doesn't fit in 64 bits"); return uint64(value); } /** * @dev Returns the downcasted uint32 from uint256, reverting on * overflow (when the input is greater than largest uint32). * * Counterpart to Solidity's `uint32` operator. * * Requirements: * * - input must fit into 32 bits */ function toUint32(uint256 value) internal pure returns (uint32) { require(value <= type(uint32).max, "SafeCast: value doesn't fit in 32 bits"); return uint32(value); } /** * @dev Returns the downcasted uint16 from uint256, reverting on * overflow (when the input is greater than largest uint16). * * Counterpart to Solidity's `uint16` operator. * * Requirements: * * - input must fit into 16 bits */ function toUint16(uint256 value) internal pure returns (uint16) { require(value <= type(uint16).max, "SafeCast: value doesn't fit in 16 bits"); return uint16(value); } /** * @dev Returns the downcasted uint8 from uint256, reverting on * overflow (when the input is greater than largest uint8). * * Counterpart to Solidity's `uint8` operator. * * Requirements: * * - input must fit into 8 bits. */ function toUint8(uint256 value) internal pure returns (uint8) { require(value <= type(uint8).max, "SafeCast: value doesn't fit in 8 bits"); return uint8(value); } /** * @dev Converts a signed int256 into an unsigned uint256. * * Requirements: * * - input must be greater than or equal to 0. */ function toUint256(int256 value) internal pure returns (uint256) { require(value >= 0, "SafeCast: value must be positive"); return uint256(value); } /** * @dev Returns the downcasted int128 from int256, reverting on * overflow (when the input is less than smallest int128 or * greater than largest int128). * * Counterpart to Solidity's `int128` operator. * * Requirements: * * - input must fit into 128 bits * * _Available since v3.1._ */ function toInt128(int256 value) internal pure returns (int128) { require(value >= type(int128).min && value <= type(int128).max, "SafeCast: value doesn't fit in 128 bits"); return int128(value); } /** * @dev Returns the downcasted int64 from int256, reverting on * overflow (when the input is less than smallest int64 or * greater than largest int64). * * Counterpart to Solidity's `int64` operator. * * Requirements: * * - input must fit into 64 bits * * _Available since v3.1._ */ function toInt64(int256 value) internal pure returns (int64) { require(value >= type(int64).min && value <= type(int64).max, "SafeCast: value doesn't fit in 64 bits"); return int64(value); } /** * @dev Returns the downcasted int32 from int256, reverting on * overflow (when the input is less than smallest int32 or * greater than largest int32). * * Counterpart to Solidity's `int32` operator. * * Requirements: * * - input must fit into 32 bits * * _Available since v3.1._ */ function toInt32(int256 value) internal pure returns (int32) { require(value >= type(int32).min && value <= type(int32).max, "SafeCast: value doesn't fit in 32 bits"); return int32(value); } /** * @dev Returns the downcasted int16 from int256, reverting on * overflow (when the input is less than smallest int16 or * greater than largest int16). * * Counterpart to Solidity's `int16` operator. * * Requirements: * * - input must fit into 16 bits * * _Available since v3.1._ */ function toInt16(int256 value) internal pure returns (int16) { require(value >= type(int16).min && value <= type(int16).max, "SafeCast: value doesn't fit in 16 bits"); return int16(value); } /** * @dev Returns the downcasted int8 from int256, reverting on * overflow (when the input is less than smallest int8 or * greater than largest int8). * * Counterpart to Solidity's `int8` operator. * * Requirements: * * - input must fit into 8 bits. * * _Available since v3.1._ */ function toInt8(int256 value) internal pure returns (int8) { require(value >= type(int8).min && value <= type(int8).max, "SafeCast: value doesn't fit in 8 bits"); return int8(value); } /** * @dev Converts an unsigned uint256 into a signed int256. * * Requirements: * * - input must be less than or equal to maxInt256. */ function toInt256(uint256 value) internal pure returns (int256) { // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive require(value <= uint256(type(int256).max), "SafeCast: value doesn't fit in an int256"); return int256(value); } } // File: @openzeppelin/contracts/utils/cryptography/ECDSA.sol pragma solidity ^0.8.0; /** * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations. * * These functions can be used to verify that a message was signed by the holder * of the private keys of a given address. */ library ECDSA { enum RecoverError { NoError, InvalidSignature, InvalidSignatureLength, InvalidSignatureS, InvalidSignatureV } function _throwError(RecoverError error) private pure { if (error == RecoverError.NoError) { return; // no error: do nothing } else if (error == RecoverError.InvalidSignature) { revert("ECDSA: invalid signature"); } else if (error == RecoverError.InvalidSignatureLength) { revert("ECDSA: invalid signature length"); } else if (error == RecoverError.InvalidSignatureS) { revert("ECDSA: invalid signature 's' value"); } else if (error == RecoverError.InvalidSignatureV) { revert("ECDSA: invalid signature 'v' value"); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature` or error string. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. * * Documentation for signature generation: * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js] * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers] * * _Available since v4.3._ */ function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) { // Check the signature length // - case 65: r,s,v signature (standard) // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._ if (signature.length == 65) { bytes32 r; bytes32 s; uint8 v; // ecrecover takes the signature parameters, and the only way to get them // currently is to use assembly. assembly { r := mload(add(signature, 0x20)) s := mload(add(signature, 0x40)) v := byte(0, mload(add(signature, 0x60))) } return tryRecover(hash, v, r, s); } else if (signature.length == 64) { bytes32 r; bytes32 vs; // ecrecover takes the signature parameters, and the only way to get them // currently is to use assembly. assembly { r := mload(add(signature, 0x20)) vs := mload(add(signature, 0x40)) } return tryRecover(hash, r, vs); } else { return (address(0), RecoverError.InvalidSignatureLength); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature`. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. */ function recover(bytes32 hash, bytes memory signature) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, signature); _throwError(error); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately. * * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures] * * _Available since v4.3._ */ function tryRecover( bytes32 hash, bytes32 r, bytes32 vs ) internal pure returns (address, RecoverError) { bytes32 s; uint8 v; assembly { s := and(vs, 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) v := add(shr(255, vs), 27) } return tryRecover(hash, v, r, s); } /** * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately. * * _Available since v4.2._ */ function recover( bytes32 hash, bytes32 r, bytes32 vs ) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, r, vs); _throwError(error); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `v`, * `r` and `s` signature fields separately. * * _Available since v4.3._ */ function tryRecover( bytes32 hash, uint8 v, bytes32 r, bytes32 s ) internal pure returns (address, RecoverError) { // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most // signatures from current libraries generate a unique signature with an s-value in the lower half order. // // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept // these malleable signatures as well. if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) { return (address(0), RecoverError.InvalidSignatureS); } if (v != 27 && v != 28) { return (address(0), RecoverError.InvalidSignatureV); } // If the signature is valid (and not malleable), return the signer address address signer = ecrecover(hash, v, r, s); if (signer == address(0)) { return (address(0), RecoverError.InvalidSignature); } return (signer, RecoverError.NoError); } /** * @dev Overload of {ECDSA-recover} that receives the `v`, * `r` and `s` signature fields separately. */ function recover( bytes32 hash, uint8 v, bytes32 r, bytes32 s ) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, v, r, s); _throwError(error); return recovered; } /** * @dev Returns an Ethereum Signed Message, created from a `hash`. This * produces hash corresponding to the one signed with the * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] * JSON-RPC method as part of EIP-191. * * See {recover}. */ function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) { // 32 is the length in bytes of hash, // enforced by the type signature above return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash)); } /** * @dev Returns an Ethereum Signed Typed Data, created from a * `domainSeparator` and a `structHash`. This produces hash corresponding * to the one signed with the * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`] * JSON-RPC method as part of EIP-712. * * See {recover}. */ function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) { return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash)); } } // File: @openzeppelin/contracts/utils/cryptography/draft-EIP712.sol pragma solidity ^0.8.0; /** * @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data. * * The encoding specified in the EIP is very generic, and such a generic implementation in Solidity is not feasible, * thus this contract does not implement the encoding itself. Protocols need to implement the type-specific encoding * they need in their contracts using a combination of `abi.encode` and `keccak256`. * * This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding * scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA * ({_hashTypedDataV4}). * * The implementation of the domain separator was designed to be as efficient as possible while still properly updating * the chain id to protect against replay attacks on an eventual fork of the chain. * * NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method * https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask]. * * _Available since v3.4._ */ abstract contract EIP712 { /* solhint-disable var-name-mixedcase */ // Cache the domain separator as an immutable value, but also store the chain id that it corresponds to, in order to // invalidate the cached domain separator if the chain id changes. bytes32 private immutable _CACHED_DOMAIN_SEPARATOR; uint256 private immutable _CACHED_CHAIN_ID; bytes32 private immutable _HASHED_NAME; bytes32 private immutable _HASHED_VERSION; bytes32 private immutable _TYPE_HASH; /* solhint-enable var-name-mixedcase */ /** * @dev Initializes the domain separator and parameter caches. * * The meaning of `name` and `version` is specified in * https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]: * * - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol. * - `version`: the current major version of the signing domain. * * NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart * contract upgrade]. */ constructor(string memory name, string memory version) { bytes32 hashedName = keccak256(bytes(name)); bytes32 hashedVersion = keccak256(bytes(version)); bytes32 typeHash = keccak256( "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)" ); _HASHED_NAME = hashedName; _HASHED_VERSION = hashedVersion; _CACHED_CHAIN_ID = block.chainid; _CACHED_DOMAIN_SEPARATOR = _buildDomainSeparator(typeHash, hashedName, hashedVersion); _TYPE_HASH = typeHash; } /** * @dev Returns the domain separator for the current chain. */ function _domainSeparatorV4() internal view returns (bytes32) { if (block.chainid == _CACHED_CHAIN_ID) { return _CACHED_DOMAIN_SEPARATOR; } else { return _buildDomainSeparator(_TYPE_HASH, _HASHED_NAME, _HASHED_VERSION); } } function _buildDomainSeparator( bytes32 typeHash, bytes32 nameHash, bytes32 versionHash ) private view returns (bytes32) { return keccak256(abi.encode(typeHash, nameHash, versionHash, block.chainid, address(this))); } /** * @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this * function returns the hash of the fully encoded EIP712 message for this domain. * * This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example: * * ```solidity * bytes32 digest = _hashTypedDataV4(keccak256(abi.encode( * keccak256("Mail(address to,string contents)"), * mailTo, * keccak256(bytes(mailContents)) * ))); * address signer = ECDSA.recover(digest, signature); * ``` */ function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) { return ECDSA.toTypedDataHash(_domainSeparatorV4(), structHash); } } // File: @openzeppelin/contracts/token/ERC20/extensions/draft-IERC20Permit.sol pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612]. * * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't * need to send a transaction, and thus is not required to hold Ether at all. */ interface IERC20Permit { /** * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens, * given ``owner``'s signed approval. * * IMPORTANT: The same issues {IERC20-approve} has related to transaction * ordering also apply here. * * Emits an {Approval} event. * * Requirements: * * - `spender` cannot be the zero address. * - `deadline` must be a timestamp in the future. * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner` * over the EIP712-formatted function arguments. * - the signature must use ``owner``'s current nonce (see {nonces}). * * For more information on the signature format, see the * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP * section]. */ function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; /** * @dev Returns the current nonce for `owner`. This value must be * included whenever a signature is generated for {permit}. * * Every successful call to {permit} increases ``owner``'s nonce by one. This * prevents a signature from being used multiple times. */ function nonces(address owner) external view returns (uint256); /** * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}. */ // solhint-disable-next-line func-name-mixedcase function DOMAIN_SEPARATOR() external view returns (bytes32); } // File: @openzeppelin/contracts/utils/Counters.sol pragma solidity ^0.8.0; /** * @title Counters * @author Matt Condon (@shrugs) * @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number * of elements in a mapping, issuing ERC721 ids, or counting request ids. * * Include with `using Counters for Counters.Counter;` */ library Counters { struct Counter { // This variable should never be directly accessed by users of the library: interactions must be restricted to // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add // this feature: see https://github.com/ethereum/solidity/issues/4637 uint256 _value; // default: 0 } function current(Counter storage counter) internal view returns (uint256) { return counter._value; } function increment(Counter storage counter) internal { unchecked { counter._value += 1; } } function decrement(Counter storage counter) internal { uint256 value = counter._value; require(value > 0, "Counter: decrement overflow"); unchecked { counter._value = value - 1; } } function reset(Counter storage counter) internal { counter._value = 0; } } // File: @openzeppelin/contracts/utils/math/Math.sol pragma solidity ^0.8.0; /** * @dev Standard math utilities missing in the Solidity language. */ library Math { /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a >= b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow. return (a & b) + (a ^ b) / 2; } /** * @dev Returns the ceiling of the division of two numbers. * * This differs from standard division with `/` in that it rounds up instead * of rounding down. */ function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b - 1) / b can overflow on addition, so we distribute. return a / b + (a % b == 0 ? 0 : 1); } } // File: @openzeppelin/contracts/utils/Arrays.sol pragma solidity ^0.8.0; /** * @dev Collection of functions related to array types. */ library Arrays { /** * @dev Searches a sorted `array` and returns the first index that contains * a value greater or equal to `element`. If no such index exists (i.e. all * values in the array are strictly less than `element`), the array length is * returned. Time complexity O(log n). * * `array` is expected to be sorted in ascending order, and to contain no * repeated elements. */ function findUpperBound(uint256[] storage array, uint256 element) internal view returns (uint256) { if (array.length == 0) { return 0; } uint256 low = 0; uint256 high = array.length; while (low < high) { uint256 mid = Math.average(low, high); // Note that mid will always be strictly less than high (i.e. it will be a valid array index) // because Math.average rounds down (it does integer division with truncation). if (array[mid] > element) { high = mid; } else { low = mid + 1; } } // At this point `low` is the exclusive upper bound. We will return the inclusive upper bound. if (low > 0 && array[low - 1] == element) { return low - 1; } else { return low; } } } // File: @openzeppelin/contracts/utils/Context.sol pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } } // File: @openzeppelin/contracts/security/Pausable.sol pragma solidity ^0.8.0; /** * @dev Contract module which allows children to implement an emergency stop * mechanism that can be triggered by an authorized account. * * This module is used through inheritance. It will make available the * modifiers `whenNotPaused` and `whenPaused`, which can be applied to * the functions of your contract. Note that they will not be pausable by * simply including this module, only once the modifiers are put in place. */ abstract contract Pausable is Context { /** * @dev Emitted when the pause is triggered by `account`. */ event Paused(address account); /** * @dev Emitted when the pause is lifted by `account`. */ event Unpaused(address account); bool private _paused; /** * @dev Initializes the contract in unpaused state. */ constructor() { _paused = false; } /** * @dev Returns true if the contract is paused, and false otherwise. */ function paused() public view virtual returns (bool) { return _paused; } /** * @dev Modifier to make a function callable only when the contract is not paused. * * Requirements: * * - The contract must not be paused. */ modifier whenNotPaused() { require(!paused(), "Pausable: paused"); _; } /** * @dev Modifier to make a function callable only when the contract is paused. * * Requirements: * * - The contract must be paused. */ modifier whenPaused() { require(paused(), "Pausable: not paused"); _; } /** * @dev Triggers stopped state. * * Requirements: * * - The contract must not be paused. */ function _pause() internal virtual whenNotPaused { _paused = true; emit Paused(_msgSender()); } /** * @dev Returns to normal state. * * Requirements: * * - The contract must be paused. */ function _unpause() internal virtual whenPaused { _paused = false; emit Unpaused(_msgSender()); } } // File: @openzeppelin/contracts/access/Ownable.sol pragma solidity ^0.8.0; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _setOwner(_msgSender()); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(owner() == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _setOwner(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _setOwner(newOwner); } function _setOwner(address newOwner) private { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } } // File: @openzeppelin/contracts/token/ERC20/IERC20.sol pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address sender, address recipient, uint256 amount ) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } // File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol pragma solidity ^0.8.0; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20Metadata is IERC20 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); } // File: @openzeppelin/contracts/token/ERC20/ERC20.sol pragma solidity ^0.8.0; /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin Contracts guidelines: functions revert * instead returning `false` on failure. This behavior is nonetheless * conventional and does not conflict with the expectations of ERC20 * applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20 is Context, IERC20, IERC20Metadata { mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * The default value of {decimals} is 18. To select a different value for * {decimals} you should overload it. * * All two of these values are immutable: they can only be set once during * construction. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5.05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless this function is * overridden; * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual override returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * Requirements: * * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom( address sender, address recipient, uint256 amount ) public virtual override returns (bool) { _transfer(sender, recipient, amount); uint256 currentAllowance = _allowances[sender][_msgSender()]; require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance"); unchecked { _approve(sender, _msgSender(), currentAllowance - amount); } return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { uint256 currentAllowance = _allowances[_msgSender()][spender]; require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); unchecked { _approve(_msgSender(), spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `amount` of tokens from `sender` to `recipient`. * * This internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer( address sender, address recipient, uint256 amount ) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); uint256 senderBalance = _balances[sender]; require(senderBalance >= amount, "ERC20: transfer amount exceeds balance"); unchecked { _balances[sender] = senderBalance - amount; } _balances[recipient] += amount; emit Transfer(sender, recipient, amount); _afterTokenTransfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply += amount; _balances[account] += amount; emit Transfer(address(0), account, amount); _afterTokenTransfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); uint256 accountBalance = _balances[account]; require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); unchecked { _balances[account] = accountBalance - amount; } _totalSupply -= amount; emit Transfer(account, address(0), amount); _afterTokenTransfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve( address owner, address spender, uint256 amount ) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * has been transferred to `to`. * - when `from` is zero, `amount` tokens have been minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens have been burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 amount ) internal virtual {} } // File: @openzeppelin/contracts/token/ERC20/extensions/draft-ERC20Permit.sol pragma solidity ^0.8.0; /** * @dev Implementation of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612]. * * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by * presenting a message signed by the account. By not relying on `{IERC20-approve}`, the token holder account doesn't * need to send a transaction, and thus is not required to hold Ether at all. * * _Available since v3.4._ */ abstract contract ERC20Permit is ERC20, IERC20Permit, EIP712 { using Counters for Counters.Counter; mapping(address => Counters.Counter) private _nonces; // solhint-disable-next-line var-name-mixedcase bytes32 private immutable _PERMIT_TYPEHASH = keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"); /** * @dev Initializes the {EIP712} domain separator using the `name` parameter, and setting `version` to `"1"`. * * It's a good idea to use the same `name` that is defined as the ERC20 token name. */ constructor(string memory name) EIP712(name, "1") {} /** * @dev See {IERC20Permit-permit}. */ function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) public virtual override { require(block.timestamp <= deadline, "ERC20Permit: expired deadline"); bytes32 structHash = keccak256(abi.encode(_PERMIT_TYPEHASH, owner, spender, value, _useNonce(owner), deadline)); bytes32 hash = _hashTypedDataV4(structHash); address signer = ECDSA.recover(hash, v, r, s); require(signer == owner, "ERC20Permit: invalid signature"); _approve(owner, spender, value); } /** * @dev See {IERC20Permit-nonces}. */ function nonces(address owner) public view virtual override returns (uint256) { return _nonces[owner].current(); } /** * @dev See {IERC20Permit-DOMAIN_SEPARATOR}. */ // solhint-disable-next-line func-name-mixedcase function DOMAIN_SEPARATOR() external view override returns (bytes32) { return _domainSeparatorV4(); } /** * @dev "Consume a nonce": return the current value and increment. * * _Available since v4.1._ */ function _useNonce(address owner) internal virtual returns (uint256 current) { Counters.Counter storage nonce = _nonces[owner]; current = nonce.current(); nonce.increment(); } } // File: @openzeppelin/contracts/token/ERC20/extensions/ERC20Votes.sol pragma solidity ^0.8.0; /** * @dev Extension of ERC20 to support Compound-like voting and delegation. This version is more generic than Compound's, * and supports token supply up to 2^224^ - 1, while COMP is limited to 2^96^ - 1. * * NOTE: If exact COMP compatibility is required, use the {ERC20VotesComp} variant of this module. * * This extension keeps a history (checkpoints) of each account's vote power. Vote power can be delegated either * by calling the {delegate} function directly, or by providing a signature to be used with {delegateBySig}. Voting * power can be queried through the public accessors {getVotes} and {getPastVotes}. * * By default, token balance does not account for voting power. This makes transfers cheaper. The downside is that it * requires users to delegate to themselves in order to activate checkpoints and have their voting power tracked. * Enabling self-delegation can easily be done by overriding the {delegates} function. Keep in mind however that this * will significantly increase the base gas cost of transfers. * * _Available since v4.2._ */ abstract contract ERC20Votes is ERC20Permit { struct Checkpoint { uint32 fromBlock; uint224 votes; } bytes32 private constant _DELEGATION_TYPEHASH = keccak256("Delegation(address delegatee,uint256 nonce,uint256 expiry)"); mapping(address => address) private _delegates; mapping(address => Checkpoint[]) private _checkpoints; Checkpoint[] private _totalSupplyCheckpoints; /** * @dev Emitted when an account changes their delegate. */ event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate); /** * @dev Emitted when a token transfer or delegate change results in changes to an account's voting power. */ event DelegateVotesChanged(address indexed delegate, uint256 previousBalance, uint256 newBalance); /** * @dev Get the `pos`-th checkpoint for `account`. */ function checkpoints(address account, uint32 pos) public view virtual returns (Checkpoint memory) { return _checkpoints[account][pos]; } /** * @dev Get number of checkpoints for `account`. */ function numCheckpoints(address account) public view virtual returns (uint32) { return SafeCast.toUint32(_checkpoints[account].length); } /** * @dev Get the address `account` is currently delegating to. */ function delegates(address account) public view virtual returns (address) { return _delegates[account]; } /** * @dev Gets the current votes balance for `account` */ function getVotes(address account) public view returns (uint256) { uint256 pos = _checkpoints[account].length; return pos == 0 ? 0 : _checkpoints[account][pos - 1].votes; } /** * @dev Retrieve the number of votes for `account` at the end of `blockNumber`. * * Requirements: * * - `blockNumber` must have been already mined */ function getPastVotes(address account, uint256 blockNumber) public view returns (uint256) { require(blockNumber < block.number, "ERC20Votes: block not yet mined"); return _checkpointsLookup(_checkpoints[account], blockNumber); } /** * @dev Retrieve the `totalSupply` at the end of `blockNumber`. Note, this value is the sum of all balances. * It is but NOT the sum of all the delegated votes! * * Requirements: * * - `blockNumber` must have been already mined */ function getPastTotalSupply(uint256 blockNumber) public view returns (uint256) { require(blockNumber < block.number, "ERC20Votes: block not yet mined"); return _checkpointsLookup(_totalSupplyCheckpoints, blockNumber); } /** * @dev Lookup a value in a list of (sorted) checkpoints. */ function _checkpointsLookup(Checkpoint[] storage ckpts, uint256 blockNumber) private view returns (uint256) { // We run a binary search to look for the earliest checkpoint taken after `blockNumber`. // // During the loop, the index of the wanted checkpoint remains in the range [low-1, high). // With each iteration, either `low` or `high` is moved towards the middle of the range to maintain the invariant. // - If the middle checkpoint is after `blockNumber`, we look in [low, mid) // - If the middle checkpoint is before or equal to `blockNumber`, we look in [mid+1, high) // Once we reach a single value (when low == high), we've found the right checkpoint at the index high-1, if not // out of bounds (in which case we're looking too far in the past and the result is 0). // Note that if the latest checkpoint available is exactly for `blockNumber`, we end up with an index that is // past the end of the array, so we technically don't find a checkpoint after `blockNumber`, but it works out // the same. uint256 high = ckpts.length; uint256 low = 0; while (low < high) { uint256 mid = Math.average(low, high); if (ckpts[mid].fromBlock > blockNumber) { high = mid; } else { low = mid + 1; } } return high == 0 ? 0 : ckpts[high - 1].votes; } /** * @dev Delegate votes from the sender to `delegatee`. */ function delegate(address delegatee) public virtual { return _delegate(_msgSender(), delegatee); } /** * @dev Delegates votes from signer to `delegatee` */ function delegateBySig( address delegatee, uint256 nonce, uint256 expiry, uint8 v, bytes32 r, bytes32 s ) public virtual { require(block.timestamp <= expiry, "ERC20Votes: signature expired"); address signer = ECDSA.recover( _hashTypedDataV4(keccak256(abi.encode(_DELEGATION_TYPEHASH, delegatee, nonce, expiry))), v, r, s ); require(nonce == _useNonce(signer), "ERC20Votes: invalid nonce"); return _delegate(signer, delegatee); } /** * @dev Maximum token supply. Defaults to `type(uint224).max` (2^224^ - 1). */ function _maxSupply() internal view virtual returns (uint224) { return type(uint224).max; } /** * @dev Snapshots the totalSupply after it has been increased. */ function _mint(address account, uint256 amount) internal virtual override { super._mint(account, amount); require(totalSupply() <= _maxSupply(), "ERC20Votes: total supply risks overflowing votes"); _writeCheckpoint(_totalSupplyCheckpoints, _add, amount); } /** * @dev Snapshots the totalSupply after it has been decreased. */ function _burn(address account, uint256 amount) internal virtual override { super._burn(account, amount); _writeCheckpoint(_totalSupplyCheckpoints, _subtract, amount); } /** * @dev Move voting power when tokens are transferred. * * Emits a {DelegateVotesChanged} event. */ function _afterTokenTransfer( address from, address to, uint256 amount ) internal virtual override { super._afterTokenTransfer(from, to, amount); _moveVotingPower(delegates(from), delegates(to), amount); } /** * @dev Change delegation for `delegator` to `delegatee`. * * Emits events {DelegateChanged} and {DelegateVotesChanged}. */ function _delegate(address delegator, address delegatee) internal virtual { address currentDelegate = delegates(delegator); uint256 delegatorBalance = balanceOf(delegator); _delegates[delegator] = delegatee; emit DelegateChanged(delegator, currentDelegate, delegatee); _moveVotingPower(currentDelegate, delegatee, delegatorBalance); } function _moveVotingPower( address src, address dst, uint256 amount ) private { if (src != dst && amount > 0) { if (src != address(0)) { (uint256 oldWeight, uint256 newWeight) = _writeCheckpoint(_checkpoints[src], _subtract, amount); emit DelegateVotesChanged(src, oldWeight, newWeight); } if (dst != address(0)) { (uint256 oldWeight, uint256 newWeight) = _writeCheckpoint(_checkpoints[dst], _add, amount); emit DelegateVotesChanged(dst, oldWeight, newWeight); } } } function _writeCheckpoint( Checkpoint[] storage ckpts, function(uint256, uint256) view returns (uint256) op, uint256 delta ) private returns (uint256 oldWeight, uint256 newWeight) { uint256 pos = ckpts.length; oldWeight = pos == 0 ? 0 : ckpts[pos - 1].votes; newWeight = op(oldWeight, delta); if (pos > 0 && ckpts[pos - 1].fromBlock == block.number) { ckpts[pos - 1].votes = SafeCast.toUint224(newWeight); } else { ckpts.push(Checkpoint({fromBlock: SafeCast.toUint32(block.number), votes: SafeCast.toUint224(newWeight)})); } } function _add(uint256 a, uint256 b) private pure returns (uint256) { return a + b; } function _subtract(uint256 a, uint256 b) private pure returns (uint256) { return a - b; } } // File: @openzeppelin/contracts/token/ERC20/extensions/ERC20Snapshot.sol pragma solidity ^0.8.0; /** * @dev This contract extends an ERC20 token with a snapshot mechanism. When a snapshot is created, the balances and * total supply at the time are recorded for later access. * * This can be used to safely create mechanisms based on token balances such as trustless dividends or weighted voting. * In naive implementations it's possible to perform a "double spend" attack by reusing the same balance from different * accounts. By using snapshots to calculate dividends or voting power, those attacks no longer apply. It can also be * used to create an efficient ERC20 forking mechanism. * * Snapshots are created by the internal {_snapshot} function, which will emit the {Snapshot} event and return a * snapshot id. To get the total supply at the time of a snapshot, call the function {totalSupplyAt} with the snapshot * id. To get the balance of an account at the time of a snapshot, call the {balanceOfAt} function with the snapshot id * and the account address. * * NOTE: Snapshot policy can be customized by overriding the {_getCurrentSnapshotId} method. For example, having it * return `block.number` will trigger the creation of snapshot at the begining of each new block. When overridding this * function, be careful about the monotonicity of its result. Non-monotonic snapshot ids will break the contract. * * Implementing snapshots for every block using this method will incur significant gas costs. For a gas-efficient * alternative consider {ERC20Votes}. * * ==== Gas Costs * * Snapshots are efficient. Snapshot creation is _O(1)_. Retrieval of balances or total supply from a snapshot is _O(log * n)_ in the number of snapshots that have been created, although _n_ for a specific account will generally be much * smaller since identical balances in subsequent snapshots are stored as a single entry. * * There is a constant overhead for normal ERC20 transfers due to the additional snapshot bookkeeping. This overhead is * only significant for the first transfer that immediately follows a snapshot for a particular account. Subsequent * transfers will have normal cost until the next snapshot, and so on. */ abstract contract ERC20Snapshot is ERC20 { // Inspired by Jordi Baylina's MiniMeToken to record historical balances: // https://github.com/Giveth/minimd/blob/ea04d950eea153a04c51fa510b068b9dded390cb/contracts/MiniMeToken.sol using Arrays for uint256[]; using Counters for Counters.Counter; // Snapshotted values have arrays of ids and the value corresponding to that id. These could be an array of a // Snapshot struct, but that would impede usage of functions that work on an array. struct Snapshots { uint256[] ids; uint256[] values; } mapping(address => Snapshots) private _accountBalanceSnapshots; Snapshots private _totalSupplySnapshots; // Snapshot ids increase monotonically, with the first value being 1. An id of 0 is invalid. Counters.Counter private _currentSnapshotId; /** * @dev Emitted by {_snapshot} when a snapshot identified by `id` is created. */ event Snapshot(uint256 id); /** * @dev Creates a new snapshot and returns its snapshot id. * * Emits a {Snapshot} event that contains the same id. * * {_snapshot} is `internal` and you have to decide how to expose it externally. Its usage may be restricted to a * set of accounts, for example using {AccessControl}, or it may be open to the public. * * [WARNING] * ==== * While an open way of calling {_snapshot} is required for certain trust minimization mechanisms such as forking, * you must consider that it can potentially be used by attackers in two ways. * * First, it can be used to increase the cost of retrieval of values from snapshots, although it will grow * logarithmically thus rendering this attack ineffective in the long term. Second, it can be used to target * specific accounts and increase the cost of ERC20 transfers for them, in the ways specified in the Gas Costs * section above. * * We haven't measured the actual numbers; if this is something you're interested in please reach out to us. * ==== */ function _snapshot() internal virtual returns (uint256) { _currentSnapshotId.increment(); uint256 currentId = _getCurrentSnapshotId(); emit Snapshot(currentId); return currentId; } /** * @dev Get the current snapshotId */ function _getCurrentSnapshotId() internal view virtual returns (uint256) { return _currentSnapshotId.current(); } /** * @dev Retrieves the balance of `account` at the time `snapshotId` was created. */ function balanceOfAt(address account, uint256 snapshotId) public view virtual returns (uint256) { (bool snapshotted, uint256 value) = _valueAt(snapshotId, _accountBalanceSnapshots[account]); return snapshotted ? value : balanceOf(account); } /** * @dev Retrieves the total supply at the time `snapshotId` was created. */ function totalSupplyAt(uint256 snapshotId) public view virtual returns (uint256) { (bool snapshotted, uint256 value) = _valueAt(snapshotId, _totalSupplySnapshots); return snapshotted ? value : totalSupply(); } // Update balance and/or total supply snapshots before the values are modified. This is implemented // in the _beforeTokenTransfer hook, which is executed for _mint, _burn, and _transfer operations. function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual override { super._beforeTokenTransfer(from, to, amount); if (from == address(0)) { // mint _updateAccountSnapshot(to); _updateTotalSupplySnapshot(); } else if (to == address(0)) { // burn _updateAccountSnapshot(from); _updateTotalSupplySnapshot(); } else { // transfer _updateAccountSnapshot(from); _updateAccountSnapshot(to); } } function _valueAt(uint256 snapshotId, Snapshots storage snapshots) private view returns (bool, uint256) { require(snapshotId > 0, "ERC20Snapshot: id is 0"); require(snapshotId <= _getCurrentSnapshotId(), "ERC20Snapshot: nonexistent id"); // When a valid snapshot is queried, there are three possibilities: // a) The queried value was not modified after the snapshot was taken. Therefore, a snapshot entry was never // created for this id, and all stored snapshot ids are smaller than the requested one. The value that corresponds // to this id is the current one. // b) The queried value was modified after the snapshot was taken. Therefore, there will be an entry with the // requested id, and its value is the one to return. // c) More snapshots were created after the requested one, and the queried value was later modified. There will be // no entry for the requested id: the value that corresponds to it is that of the smallest snapshot id that is // larger than the requested one. // // In summary, we need to find an element in an array, returning the index of the smallest value that is larger if // it is not found, unless said value doesn't exist (e.g. when all values are smaller). Arrays.findUpperBound does // exactly this. uint256 index = snapshots.ids.findUpperBound(snapshotId); if (index == snapshots.ids.length) { return (false, 0); } else { return (true, snapshots.values[index]); } } function _updateAccountSnapshot(address account) private { _updateSnapshot(_accountBalanceSnapshots[account], balanceOf(account)); } function _updateTotalSupplySnapshot() private { _updateSnapshot(_totalSupplySnapshots, totalSupply()); } function _updateSnapshot(Snapshots storage snapshots, uint256 currentValue) private { uint256 currentId = _getCurrentSnapshotId(); if (_lastSnapshotId(snapshots.ids) < currentId) { snapshots.ids.push(currentId); snapshots.values.push(currentValue); } } function _lastSnapshotId(uint256[] storage ids) private view returns (uint256) { if (ids.length == 0) { return 0; } else { return ids[ids.length - 1]; } } } // File: @openzeppelin/contracts/token/ERC20/extensions/ERC20Burnable.sol pragma solidity ^0.8.0; /** * @dev Extension of {ERC20} that allows token holders to destroy both their own * tokens and those that they have an allowance for, in a way that can be * recognized off-chain (via event analysis). */ abstract contract ERC20Burnable is Context, ERC20 { /** * @dev Destroys `amount` tokens from the caller. * * See {ERC20-_burn}. */ function burn(uint256 amount) public virtual { _burn(_msgSender(), amount); } /** * @dev Destroys `amount` tokens from `account`, deducting from the caller's * allowance. * * See {ERC20-_burn} and {ERC20-allowance}. * * Requirements: * * - the caller must have allowance for ``accounts``'s tokens of at least * `amount`. */ function burnFrom(address account, uint256 amount) public virtual { uint256 currentAllowance = allowance(account, _msgSender()); require(currentAllowance >= amount, "ERC20: burn amount exceeds allowance"); unchecked { _approve(account, _msgSender(), currentAllowance - amount); } _burn(account, amount); } } // File: Granna.sol pragma solidity ^0.8.2; /// @custom:security-contact [email protected] contract Granna is ERC20, ERC20Burnable, ERC20Snapshot, Ownable, Pausable, ERC20Permit, ERC20Votes { constructor() ERC20("Granna", "GRNA") ERC20Permit("Granna") { _mint(msg.sender, 10000000000 * 10 ** decimals()); } function snapshot() public onlyOwner { _snapshot(); } function pause() public onlyOwner { _pause(); } function unpause() public onlyOwner { _unpause(); } function _beforeTokenTransfer(address from, address to, uint256 amount) internal whenNotPaused override(ERC20, ERC20Snapshot) { super._beforeTokenTransfer(from, to, amount); } // The following functions are overrides required by Solidity. function _afterTokenTransfer(address from, address to, uint256 amount) internal override(ERC20, ERC20Votes) { super._afterTokenTransfer(from, to, amount); } function _mint(address to, uint256 amount) internal override(ERC20, ERC20Votes) { super._mint(to, amount); } function _burn(address account, uint256 amount) internal override(ERC20, ERC20Votes) { super._burn(account, amount); } }
True
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/** *Submitted for verification at Etherscan.io on 2021-04-30 */ pragma solidity ^0.5.0; // ---------------------------------------------------------------------------- // ERC Token Standard #20 Interface // // ---------------------------------------------------------------------------- contract ERC20Interface { function totalSupply() public view returns (uint); function balanceOf(address tokenOwner) public view returns (uint balance); function allowance(address tokenOwner, address spender) public view returns (uint remaining); function transfer(address to, uint tokens) public returns (bool success); function approve(address spender, uint tokens) public returns (bool success); function transferFrom(address from, address to, uint tokens) public returns (bool success); event Transfer(address indexed from, address indexed to, uint tokens); event Approval(address indexed tokenOwner, address indexed spender, uint tokens); } // ---------------------------------------------------------------------------- // Safe Math Library // ---------------------------------------------------------------------------- contract SafeMath { function safeAdd(uint a, uint b) public pure returns (uint c) { c = a + b; require(c >= a); } function safeSub(uint a, uint b) public pure returns (uint c) { require(b <= a); c = a - b; } function safeMul(uint a, uint b) public pure returns (uint c) { c = a * b; require(a == 0 || c / a == b); } function safeDiv(uint a, uint b) public pure returns (uint c) { require(b > 0); c = a / b; } } contract RelProtocol is ERC20Interface, SafeMath { string public name; string public symbol; uint8 public decimals; // 18 decimals is the strongly suggested default, avoid changing it uint256 public _totalSupply; mapping(address => uint) balances; mapping(address => mapping(address => uint)) allowed; /** * Constrctor function * * Initializes contract with initial supply tokens to the creator of the contract */ constructor() public { name = "REL"; symbol = "REL"; decimals = 18; _totalSupply = 100000000000000000000000000; balances[msg.sender] = _totalSupply; emit Transfer(address(0), msg.sender, _totalSupply); } function totalSupply() public view returns (uint) { return _totalSupply - balances[address(0)]; } function balanceOf(address tokenOwner) public view returns (uint balance) { return balances[tokenOwner]; } function allowance(address tokenOwner, address spender) public view returns (uint remaining) { return allowed[tokenOwner][spender]; } function approve(address spender, uint tokens) public returns (bool success) { allowed[msg.sender][spender] = tokens; emit Approval(msg.sender, spender, tokens); return true; } function transfer(address to, uint tokens) public returns (bool success) { balances[msg.sender] = safeSub(balances[msg.sender], tokens); balances[to] = safeAdd(balances[to], tokens); emit Transfer(msg.sender, to, tokens); return true; } function transferFrom(address from, address to, uint tokens) public returns (bool success) { balances[from] = safeSub(balances[from], tokens); allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens); balances[to] = safeAdd(balances[to], tokens); emit Transfer(from, to, tokens); return true; } }
True
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/** *Submitted for verification at Etherscan.io on 2022-03-19 */ //SPDX-License-Identifier: Unlicensed /** BEATKONG uses the power of music on the Ethereum Blockchain to reward all its holders with a moonshot they deserve. A decentralized meme token with big plans to become the ruler of Ethereum Mainnet. https://t.me/beatkong **/ pragma solidity ^0.8.4; abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } } interface IERC20 { function totalSupply() external view returns (uint256); function balanceOf(address account) external view returns (uint256); function transfer(address recipient, uint256 amount) external returns (bool); function allowance(address owner, address spender) external view returns (uint256); function approve(address spender, uint256 amount) external returns (bool); function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); event Approval(address indexed owner, address indexed spender, uint256 value); } library SafeMath { function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; return c; } } contract Ownable is Context { address private _owner; address private _previousOwner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); constructor () { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } function owner() public view returns (address) { return _owner; } modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } } interface IUniswapV2Factory { function createPair(address tokenA, address tokenB) external returns (address pair); } interface IUniswapV2Router02 { function swapExactTokensForETHSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external; function factory() external pure returns (address); function WETH() external pure returns (address); function addLiquidityETH( address token, uint amountTokenDesired, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external payable returns (uint amountToken, uint amountETH, uint liquidity); } contract BeatKong is Context, IERC20, Ownable { using SafeMath for uint256; mapping (address => uint256) private _rOwned; mapping (address => uint256) private _tOwned; mapping (address => uint256) private _buyMap; mapping (address => mapping (address => uint256)) private _allowances; mapping (address => bool) private _isExcludedFromFee; mapping (address => bool) private bots; mapping (address => uint) private cooldown; uint256 private constant MAX = ~uint256(0); uint256 private constant _tTotal = 60000000 * 10**9; uint256 private _rTotal = (MAX - (MAX % _tTotal)); uint256 private _tFeeTotal; uint256 private _feeAddr1; uint256 private _feeAddr2; address payable private _feeAddrWallet1; string private constant _name = "Beat Kong"; string private constant _symbol = "BEATKONG"; uint8 private constant _decimals = 9; IUniswapV2Router02 private uniswapV2Router; address private uniswapV2Pair; bool private tradingOpen; bool private inSwap = false; bool private swapEnabled = false; bool private cooldownEnabled = false; uint256 private _maxTxAmount = _tTotal; uint256 private _maxWallet = _tTotal; event MaxTxAmountUpdated(uint _maxTxAmount); modifier lockTheSwap { inSwap = true; _; inSwap = false; } constructor () { _feeAddrWallet1 = payable(_msgSender()); _rOwned[address(this)] = _rTotal; _isExcludedFromFee[owner()] = true; _isExcludedFromFee[address(this)] = true; _isExcludedFromFee[_feeAddrWallet1] = true; _maxTxAmount = 600000 * 10 ** 9; _maxWallet=1200000 * 10 ** 9; emit Transfer(address(_msgSender()), _msgSender(), _tTotal); } function name() public pure returns (string memory) { return _name; } function symbol() public pure returns (string memory) { return _symbol; } function decimals() public pure returns (uint8) { return _decimals; } function totalSupply() public pure override returns (uint256) { return _tTotal; } function originalPurchase(address account) public view returns (uint256) { return _buyMap[account]; } function balanceOf(address account) public view override returns (uint256) { return tokenFromReflection(_rOwned[account]); } function transfer(address recipient, uint256 amount) public override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } function allowance(address owner, address spender) public view override returns (uint256) { return _allowances[owner][spender]; } function approve(address spender, uint256 amount) public override returns (bool) { _approve(_msgSender(), spender, amount); return true; } function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } function setCooldownEnabled(bool onoff) external onlyOwner() { cooldownEnabled = onoff; } function setMaxTx(uint256 maxTransactionAmount) external onlyOwner() { _maxTxAmount = maxTransactionAmount; } function tokenFromReflection(uint256 rAmount) private view returns(uint256) { require(rAmount <= _rTotal, "Amount must be less than total reflections"); uint256 currentRate = _getRate(); return rAmount.div(currentRate); } function _approve(address owner, address spender, uint256 amount) private { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } function _transfer(address from, address to, uint256 amount) private { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); require(amount > 0, "Transfer amount must be greater than zero"); if (!_isBuy(from)) { // TAX SELLERS 25% WHO SELL WITHIN 4 HOURS if (_buyMap[from] != 0 && (_buyMap[from] + (4 hours) >= block.timestamp)) { _feeAddr1 = 2; _feeAddr2 = 25; } else { _feeAddr1 = 2; _feeAddr2 = 6; } } else { if (_buyMap[to] == 0) { _buyMap[to] = block.timestamp; } _feeAddr1 = 2; _feeAddr2 = 6; } if (from != owner() && to != owner()) { require(!bots[from] && !bots[to]); if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] && cooldownEnabled) { require(tradingOpen); // Cooldown require(amount <= _maxTxAmount); require(cooldown[to] < block.timestamp); } uint256 contractTokenBalance = balanceOf(address(this)); if (!inSwap && from != uniswapV2Pair && swapEnabled) { swapTokensForEth(contractTokenBalance); uint256 contractETHBalance = address(this).balance; if(contractETHBalance > 100000000000000000) { sendETHToFee(address(this).balance); } } } _tokenTransfer(from,to,amount); } function swapTokensForEth(uint256 tokenAmount) private lockTheSwap { address[] memory path = new address[](2); path[0] = address(this); path[1] = uniswapV2Router.WETH(); _approve(address(this), address(uniswapV2Router), tokenAmount); uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens( tokenAmount, 0, path, address(this), block.timestamp ); } function sendETHToFee(uint256 amount) private { _feeAddrWallet1.transfer(amount); } function createPair() external onlyOwner() { require(!tradingOpen,"trading is already open"); IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); uniswapV2Router = _uniswapV2Router; _approve(address(this), address(uniswapV2Router), _tTotal); } function addLiquidity() public onlyOwner{ uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(address(this), uniswapV2Router.WETH()); uniswapV2Router.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp); swapEnabled = true; cooldownEnabled = true; IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max); } function enableTrading() external onlyOwner{ tradingOpen = true; } function setBots(address[] memory bots_) public onlyOwner{ for (uint i = 0; i < bots_.length; i++) { bots[bots_[i]] = true; } } function removeStrictTxLimit() public onlyOwner { _maxTxAmount = _rTotal; } function delBot(address notbot) public onlyOwner { bots[notbot] = false; } function _tokenTransfer(address sender, address recipient, uint256 amount) private { _transferStandard(sender, recipient, amount); } function _transferStandard(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _takeTeam(tTeam); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function _takeTeam(uint256 tTeam) private { uint256 currentRate = _getRate(); uint256 rTeam = tTeam.mul(currentRate); _rOwned[address(this)] = _rOwned[address(this)].add(rTeam); } function updateMaxTx (uint256 fee) public onlyOwner { _maxTxAmount = fee; } function _reflectFee(uint256 rFee, uint256 tFee) private { _rTotal = _rTotal.sub(rFee); _tFeeTotal = _tFeeTotal.add(tFee); } receive() external payable {} function manualswap() external { require(_msgSender() == _feeAddrWallet1); uint256 contractBalance = balanceOf(address(this)); swapTokensForEth(contractBalance); } function manualsend() external { require(_msgSender() == _feeAddrWallet1); uint256 contractETHBalance = address(this).balance; sendETHToFee(contractETHBalance); } function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) { (uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getTValues(tAmount, _feeAddr1, _feeAddr2); uint256 currentRate = _getRate(); (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tTeam, currentRate); return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam); } function _getTValues(uint256 tAmount, uint256 taxFee, uint256 TeamFee) private pure returns (uint256, uint256, uint256) { uint256 tFee = tAmount.mul(taxFee).div(100); uint256 tTeam = tAmount.mul(TeamFee).div(100); uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam); return (tTransferAmount, tFee, tTeam); } function _getRValues(uint256 tAmount, uint256 tFee, uint256 tTeam, uint256 currentRate) private pure returns (uint256, uint256, uint256) { uint256 rAmount = tAmount.mul(currentRate); uint256 rFee = tFee.mul(currentRate); uint256 rTeam = tTeam.mul(currentRate); uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam); return (rAmount, rTransferAmount, rFee); } function _isBuy(address _sender) private view returns (bool) { return _sender == uniswapV2Pair; } function _getRate() private view returns(uint256) { (uint256 rSupply, uint256 tSupply) = _getCurrentSupply(); return rSupply.div(tSupply); } function _getCurrentSupply() private view returns(uint256, uint256) { uint256 rSupply = _rTotal; uint256 tSupply = _tTotal; if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal); return (rSupply, tSupply); } }
True
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/** *Submitted for verification at Etherscan.io on 2021-08-18 */ pragma solidity ^0.5.17; library SafeMath { function add(uint256 a, uint256 b) internal pure returns (uint256 c) { c = a + b; require(c >= a, "SafeMath: addition overflow"); } function sub(uint256 a, uint256 b) internal pure returns (uint256 c) { require(b <= a, "SafeMath: subtraction overflow"); return a - b; } function mul(uint256 a, uint256 b) internal pure returns (uint256 c) { if (a == 0) { return 0; } c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); } function div(uint256 a, uint256 b) internal pure returns (uint256 c) { // Since Solidity automatically asserts when dividing by 0, // but we only need it to revert. require(b > 0, "SafeMath: division by zero"); return a / b; } function mod(uint256 a, uint256 b) internal pure returns (uint256 c) { // Same reason as `div`. require(b > 0, "SafeMath: modulo by zero"); return a % b; } } interface IERC20 { event Transfer(address indexed _from, address indexed _to, uint256 _value); event Approval(address indexed _owner, address indexed _spender, uint256 _value); function totalSupply() external view returns (uint256 _supply); function balanceOf(address _owner) external view returns (uint256 _balance); function approve(address _spender, uint256 _value) external returns (bool _success); function allowance(address _owner, address _spender) external view returns (uint256 _value); function transfer(address _to, uint256 _value) external returns (bool _success); function transferFrom(address _from, address _to, uint256 _value) external returns (bool _success); } contract ERC20 is IERC20 { using SafeMath for uint256; uint256 public totalSupply; mapping (address => uint256) public balanceOf; mapping (address => mapping (address => uint256)) public allowance; function approve(address _spender, uint256 _value) public returns (bool) { _approve(msg.sender, _spender, _value); return true; } function increaseAllowance(address _spender, uint256 _value) public returns (bool) { _approve(msg.sender, _spender, allowance[msg.sender][_spender].add(_value)); return true; } function decreaseAllowance(address _spender, uint256 _value) public returns (bool) { _approve(msg.sender, _spender, allowance[msg.sender][_spender].sub(_value)); return true; } function transfer(address _to, uint256 _value) public returns (bool _success) { _transfer(msg.sender, _to, _value); return true; } function transferFrom(address _from, address _to, uint256 _value) public returns (bool _success) { _transfer(_from, _to, _value); _approve(_from, msg.sender, allowance[_from][msg.sender].sub(_value)); return true; } function _approve(address _owner, address _spender, uint256 _amount) internal { require(_owner != address(0), "ERC20: approve from the zero address"); require(_spender != address(0), "ERC20: approve to the zero address"); allowance[_owner][_spender] = _amount; emit Approval(_owner, _spender, _amount); } function _transfer(address _from, address _to, uint256 _value) internal { require(_from != address(0), "ERC20: transfer from the zero address"); require(_to != address(0), "ERC20: transfer to the zero address"); require(_to != address(this), "ERC20: transfer to this contract address"); balanceOf[_from] = balanceOf[_from].sub(_value); balanceOf[_to] = balanceOf[_to].add(_value); emit Transfer(msg.sender, _to, _value); } } interface IERC20Detailed { function name() external view returns (string memory _name); function symbol() external view returns (string memory _symbol); function decimals() external view returns (uint8 _decimals); } contract ERC20Detailed is ERC20, IERC20Detailed { string public name; string public symbol; uint8 public decimals; constructor(string memory _name, string memory _symbol, uint8 _decimals) public { name = _name; symbol = _symbol; decimals = _decimals; } } contract OXI is ERC20Detailed { constructor() public ERC20Detailed("Oxie", "OXI", 18) { totalSupply = uint256(770000000).mul(uint256(10)**18); balanceOf[msg.sender] = totalSupply; emit Transfer(address(0), msg.sender, totalSupply); } }
True
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pragma solidity ^0.4.13; contract ERC20Interface { uint256 public totalSupply; function balanceOf(address _owner) constant returns (uint256 balance); function transfer(address _to, uint256 _value) returns (bool success); function transferFrom(address _from, address _to, uint256 _value) returns (bool success); function approve(address _spender, uint256 _value) returns (bool success); function allowance(address _owner, address _spender) constant returns (uint256 remaining); event Transfer(address indexed _from, address indexed _to, uint256 _value); event Approval(address indexed _owner, address indexed _spender, uint256 _value); } contract Testico is ERC20Interface { address public owner; string public constant symbol = "TMB"; string public constant name = "Test ICO"; uint8 public constant decimals = 8; uint256 initialSupply = 2500000000000000; uint256 public shareholdersBalance; uint256 public totalShareholders; mapping (address => bool) registeredShareholders; mapping (uint => address) public shareholders; mapping (address => uint256) balances; mapping (address => mapping (address => uint256)) public allowed; modifier onlyOwner() { require(msg.sender == owner); _; } function isToken() public constant returns (bool weAre) { return true; } modifier onlyPayloadSize(uint size) { require(msg.data.length >= size + 4); _; } event Transfer(address indexed from, address indexed to, uint256 value); event Burn(address indexed from, uint256 value); event Approval(address indexed _owner, address indexed _spender, uint256 _value); function Testico() { owner = msg.sender; balances[owner] = initialSupply; totalSupply=initialSupply; totalShareholders = 0; shareholdersBalance = 0; } function balanceOf(address _owner) constant returns (uint256 balance) { return balances[_owner]; } /// @notice Send `_value` tokens to `_to` from your account /// @param _to The address of the recipient /// @param _value the amount to send function transfer(address _to, uint256 _value) onlyPayloadSize(2 * 32) returns (bool success) { if(_to != 0x0 && _value > 0 && balances[msg.sender] >= _value && balances[_to] + _value > balances[_to]) { balances[msg.sender] -= _value; balances[_to] += _value; if (msg.sender == owner && _to != owner) { shareholdersBalance += _value; } if (msg.sender != owner && _to == owner) { shareholdersBalance -= _value; } if (owner != _to) { insertShareholder(_to); } Transfer(msg.sender, _to, _value); return true; } else { return false; } } /// @notice Send `_value` tokens to `_to` in behalf of `_from` /// @param _from The address of the sender /// @param _to The address of the recipient /// @param _value the amount to send function transferFrom(address _from, address _to, uint256 _value) returns (bool success) { if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && _value > 0 && balances[_to] + _value > balances[_to]) { balances[_from] -= _value; allowed[_from][msg.sender] -= _value; balances[_to] += _value; if (_from == owner && _to != owner) { shareholdersBalance += _value; } if (_from != owner && _to == owner) { shareholdersBalance -= _value; } if (owner != _to) { insertShareholder(_to); } Transfer(_from, _to, _value); return true; } else { return false; } } /// @notice Allows `_spender` to spend no more than `_value` tokens in your behalf /// @param _spender The address authorized to spend /// @param _value the max amount they can spend function approve(address _spender, uint256 _value) returns (bool success) { if ((_value != 0) && (allowed[msg.sender][_spender] != 0)) { return false; } allowed[msg.sender][_spender] = _value; Approval(msg.sender, _spender, _value); return true; } function allowance(address _owner, address _spender) constant returns (uint256 remaining) { return allowed[_owner][_spender]; } /// @notice Remove `_value` tokens from the system irreversibly /// @param _value the amount of money to burn function burn(uint256 _value) onlyOwner returns (bool success) { require (balances[msg.sender] > _value); // Check if the sender has enough balances[msg.sender] -= _value; // Subtract from the sender totalSupply -= _value; // Updates totalSupply Burn(msg.sender, _value); return true; } function insertShareholder(address _shareholder) internal returns (bool) { if (registeredShareholders[_shareholder] == true) { return false; } else { totalShareholders += 1; shareholders[totalShareholders] = _shareholder; registeredShareholders[_shareholder] = true; return true; } return false; } function shareholdersBalance() public returns (uint256) { return shareholdersBalance; } function totalShareholders() public returns (uint256) { return totalShareholders; } function getShareholder(uint256 _index) public returns (address) { return shareholders[_index]; } }
True
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/** *Submitted for verification at Etherscan.io on 2022-04-05 */ // SPDX-License-Identifier: MIT /* @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%%%%%%%%%##*+=======-+#%%%%%%%%%%%%%%%%% @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%%#**+=======+**#%%%%%%%%*-=%%%%%%%%%%%%%%%% @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%#**+======++*##%@@@@@@@@@@%%%%%%%%%%%==%%%%%%%%%%%%%%% @@@@@@@@@@@@@@@@@@@@@@@%#**++++=+++**#%%@@@@@@@@@@@@@@@@@@@@@@%%%%%%%%%%%#.%%%%%%%%%%%%%%% @@@@@@@@@@@@@@#*+======+*#%@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%%%%%%%%%%%:#%%%%%%%%%%%%%% @@@@@@@@@@@%==*%@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%%%%%%%%%%==%%%%%%%%%%%%%% @@@@@@@@@@%:%@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%%%%%%%%%#.%%%%%%%%%%%%%% @@@@@@@@@@[email protected]@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%%@@@@@@@@@%%%%%%%%%:#%%%%%%%%%%%%% @@@@@@@@@@*[email protected]@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@#***%@@+:. -%@@@@@@@%%%%%%%%+=%%%%%%%%%%%%% @@@@@@@@@@@[email protected]@@@@@@@@@@@@@@@@@@@@@@@#=-*@+ :%* =+- :@@@@@@@@%%%%%%%#.%%%%%%%%%%%%% @@@@@@@@@@@-#@@@@@@@@@@@@@@@@+. [email protected]@@+ =% *#- [email protected] *@% #@@@@@@@%%%%%%%%:#%%%%%%%%%%%% @@@@@@@@@@@*[email protected]@@@@@@@@@@@@@@@@...*@@+ =% #@%*#%@- :@@: [email protected]@@@@@@@%%%%%%%==%%%%%%%%%%%% @@@@@@@@@@@@[email protected]@@@@@@@@@@@@@@@@#..:@@*[email protected]+...-*%@@@* =- *@@@@@@@@@%%%%%%#.%%%%%%%%%%%% @@@@@@@@@@@@-#@@@@@@@@@@@@@@@@@[email protected]*[email protected]@%-....-#@@. .-#@@@@@@@@@@@%%%%%%:#%%%%%%%%%%% @@@@@@@@@@@@*[email protected]@@@@@@@@@@@@@@@@%::.##[email protected]@@@%*[email protected]:@@@@@@@@@@@@@@@@%%%%%==%%%%%%%%%%% @@@@@@@@@@@@@[email protected]@@@@@@@@@@@@@@@@@*::-#.:[email protected]@#*+%@%:..**...%@@@@@@@@@@@@@@@@%%%%#:%%%%%%%%%%% @@@@@@@@@@@@@-#@@@@@@@@@@@@@@@@@@=::-::[email protected]@+::-##::.*@[email protected]@@@@@@@@@@@@@@@@%%%%:#%%%%%%%%%% @@@@@@@@@@@@@*[email protected]@@@@@@@@@@@@@@@@@%:-:::[email protected]@@=::::::[email protected]@+=+*@@@@@@@@@@@@@@@@@@%%%==%%%%%%%%%% @@@@@@@@@@@@@@[email protected]@@@@@@@@@@@@@@@@@@*---:[email protected]@@@%#*##@@@@@@@@@@@@@@@@@@@@@@@@@@%%%#:%%%%%%%%%% @@@@@@@@@@@@@@:#@@@@@@@@@@@@@@@@@@@##%@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%%%.%%%%%%%%%% @@@@@@@@@@@@@@[email protected]@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%*-%%%%%%%%%% @@@@@@@@@@@@@@@[email protected]@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%*-=%%%%%%%%%%% @@@@@@@@@@@@@@@:#@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%#*+=======*%%%%%%%%%%%%% @@@@@@@@@@@@@@@[email protected]@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%##*++=====++*##%%%%%%%%%%%%%%%%%%%%% @@@@@@@@@@@@@@@%[email protected]@@@@@@@@@@@@@@@@@@@@@@@%##*+++++++++*##%@@@@@@@@@@@@%%%%%%%%%%%%%%%%%%%% @@@@@@@@@@@@@@@@*-#@@@@@@@@@@%##*++++++++**#%%@@@@@@@@@@@@@@@@@@@@@@@@@%%%%%%%%%%%%%%%%%%% @@@@@@@@@@@@@@@@@@*=+++++++++*##%@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%%%%%%%%%%%%%%%%%% @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%%%%%%%%%%%%%%%%% @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%%%%%%%%%%%%%%%%% @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%%%%%%%%%%%%%%%% @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%%%%%%%%%%%%%%% @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%%%%%%%%%%%%%% @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%%%%%%%%%%%%% @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%%%%%%%%%%%% @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%%%%%%%%%%%% @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%%%%%%%%%%% */ // File: @openzeppelin/contracts/utils/Strings.sol // OpenZeppelin Contracts v4.4.1 (utils/Strings.sol) pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); while (value != 0) { digits -= 1; buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); value /= 10; } return string(buffer); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0x00"; } uint256 temp = value; uint256 length = 0; while (temp != 0) { length++; temp >>= 8; } return toHexString(value, length); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _HEX_SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } } // File: @openzeppelin/contracts/utils/Context.sol // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } } // File: @openzeppelin/contracts/access/Ownable.sol // OpenZeppelin Contracts v4.4.1 (access/Ownable.sol) pragma solidity ^0.8.0; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(owner() == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } } // File: @openzeppelin/contracts/utils/Address.sol // OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } // File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol // OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol) pragma solidity ^0.8.0; /** * @title ERC721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC721 asset contracts. */ interface IERC721Receiver { /** * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} * by `operator` from `from`, this function is called. * * It must return its Solidity selector to confirm the token transfer. * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted. * * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`. */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); } // File: @openzeppelin/contracts/utils/introspection/IERC165.sol // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); } // File: @openzeppelin/contracts/utils/introspection/ERC165.sol // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } } // File: @openzeppelin/contracts/token/ERC721/IERC721.sol // OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol) pragma solidity ^0.8.0; /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes calldata data ) external; } // File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol // OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol) pragma solidity ^0.8.0; /** * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Enumerable is IERC721 { /** * @dev Returns the total amount of tokens stored by the contract. */ function totalSupply() external view returns (uint256); /** * @dev Returns a token ID owned by `owner` at a given `index` of its token list. * Use along with {balanceOf} to enumerate all of ``owner``'s tokens. */ function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256); /** * @dev Returns a token ID at a given `index` of all the tokens stored by the contract. * Use along with {totalSupply} to enumerate all tokens. */ function tokenByIndex(uint256 index) external view returns (uint256); } // File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol // OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol) pragma solidity ^0.8.0; /** * @title ERC-721 Non-Fungible Token Standard, optional metadata extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Metadata is IERC721 { /** * @dev Returns the token collection name. */ function name() external view returns (string memory); /** * @dev Returns the token collection symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token. */ function tokenURI(uint256 tokenId) external view returns (string memory); } // File: erc721a/contracts/ERC721A.sol // Creator: Chiru Labs pragma solidity ^0.8.4; error ApprovalCallerNotOwnerNorApproved(); error ApprovalQueryForNonexistentToken(); error ApproveToCaller(); error ApprovalToCurrentOwner(); error BalanceQueryForZeroAddress(); error MintedQueryForZeroAddress(); error BurnedQueryForZeroAddress(); error MintToZeroAddress(); error MintZeroQuantity(); error OwnerIndexOutOfBounds(); error OwnerQueryForNonexistentToken(); error TokenIndexOutOfBounds(); error TransferCallerNotOwnerNorApproved(); error TransferFromIncorrectOwner(); error TransferToNonERC721ReceiverImplementer(); error TransferToZeroAddress(); error URIQueryForNonexistentToken(); /** * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including * the Metadata and Enumerable extension. Built to optimize for lower gas during batch mints. * * Assumes serials are sequentially minted starting at 0 (e.g. 0, 1, 2, 3..). * * Assumes that an owner cannot have more than 2**64 - 1 (max value of uint64) of supply. * * Assumes that the maximum token id cannot exceed 2**128 - 1 (max value of uint128). */ contract ERC721A is Context, ERC165, IERC721, IERC721Metadata, IERC721Enumerable { using Address for address; using Strings for uint256; // Compiler will pack this into a single 256bit word. struct TokenOwnership { // The address of the owner. address addr; // Keeps track of the start time of ownership with minimal overhead for tokenomics. uint64 startTimestamp; // Whether the token has been burned. bool burned; } // Compiler will pack this into a single 256bit word. struct AddressData { // Realistically, 2**64-1 is more than enough. uint64 balance; // Keeps track of mint count with minimal overhead for tokenomics. uint64 numberMinted; // Keeps track of burn count with minimal overhead for tokenomics. uint64 numberBurned; } // Compiler will pack the following // _currentIndex and _burnCounter into a single 256bit word. // The tokenId of the next token to be minted. uint128 internal _currentIndex; // The number of tokens burned. uint128 internal _burnCounter; // Token name string private _name; // Token symbol string private _symbol; // Mapping from token ID to ownership details // An empty struct value does not necessarily mean the token is unowned. See ownershipOf implementation for details. mapping(uint256 => TokenOwnership) internal _ownerships; // Mapping owner address to address data mapping(address => AddressData) private _addressData; // Mapping from token ID to approved address mapping(uint256 => address) private _tokenApprovals; // Mapping from owner to operator approvals mapping(address => mapping(address => bool)) private _operatorApprovals; constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev See {IERC721Enumerable-totalSupply}. */ function totalSupply() public view override returns (uint256) { // Counter underflow is impossible as _burnCounter cannot be incremented // more than _currentIndex times unchecked { return _currentIndex - _burnCounter; } } /** * @dev See {IERC721Enumerable-tokenByIndex}. * This read function is O(totalSupply). If calling from a separate contract, be sure to test gas first. * It may also degrade with extremely large collection sizes (e.g >> 10000), test for your use case. */ function tokenByIndex(uint256 index) public view override returns (uint256) { uint256 numMintedSoFar = _currentIndex; uint256 tokenIdsIdx; // Counter overflow is impossible as the loop breaks when // uint256 i is equal to another uint256 numMintedSoFar. unchecked { for (uint256 i; i < numMintedSoFar; i++) { TokenOwnership memory ownership = _ownerships[i]; if (!ownership.burned) { if (tokenIdsIdx == index) { return i; } tokenIdsIdx++; } } } revert TokenIndexOutOfBounds(); } /** * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}. * This read function is O(totalSupply). If calling from a separate contract, be sure to test gas first. * It may also degrade with extremely large collection sizes (e.g >> 10000), test for your use case. */ function tokenOfOwnerByIndex(address owner, uint256 index) public view override returns (uint256) { if (index >= balanceOf(owner)) revert OwnerIndexOutOfBounds(); uint256 numMintedSoFar = _currentIndex; uint256 tokenIdsIdx; address currOwnershipAddr; // Counter overflow is impossible as the loop breaks when // uint256 i is equal to another uint256 numMintedSoFar. unchecked { for (uint256 i; i < numMintedSoFar; i++) { TokenOwnership memory ownership = _ownerships[i]; if (ownership.burned) { continue; } if (ownership.addr != address(0)) { currOwnershipAddr = ownership.addr; } if (currOwnershipAddr == owner) { if (tokenIdsIdx == index) { return i; } tokenIdsIdx++; } } } // Execution should never reach this point. revert(); } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) { return interfaceId == type(IERC721).interfaceId || interfaceId == type(IERC721Metadata).interfaceId || interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC721-balanceOf}. */ function balanceOf(address owner) public view override returns (uint256) { if (owner == address(0)) revert BalanceQueryForZeroAddress(); return uint256(_addressData[owner].balance); } function _numberMinted(address owner) internal view returns (uint256) { if (owner == address(0)) revert MintedQueryForZeroAddress(); return uint256(_addressData[owner].numberMinted); } function _numberBurned(address owner) internal view returns (uint256) { if (owner == address(0)) revert BurnedQueryForZeroAddress(); return uint256(_addressData[owner].numberBurned); } /** * Gas spent here starts off proportional to the maximum mint batch size. * It gradually moves to O(1) as tokens get transferred around in the collection over time. */ function ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) { uint256 curr = tokenId; unchecked { if (curr < _currentIndex) { TokenOwnership memory ownership = _ownerships[curr]; if (!ownership.burned) { if (ownership.addr != address(0)) { return ownership; } // Invariant: // There will always be an ownership that has an address and is not burned // before an ownership that does not have an address and is not burned. // Hence, curr will not underflow. while (true) { curr--; ownership = _ownerships[curr]; if (ownership.addr != address(0)) { return ownership; } } } } } revert OwnerQueryForNonexistentToken(); } /** * @dev See {IERC721-ownerOf}. */ function ownerOf(uint256 tokenId) public view override returns (address) { return ownershipOf(tokenId).addr; } /** * @dev See {IERC721Metadata-name}. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev See {IERC721Metadata-symbol}. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev See {IERC721Metadata-tokenURI}. */ function tokenURI(uint256 tokenId) public view virtual override returns (string memory) { if (!_exists(tokenId)) revert URIQueryForNonexistentToken(); string memory baseURI = _baseURI(); return bytes(baseURI).length != 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : ''; } /** * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each * token will be the concatenation of the `baseURI` and the `tokenId`. Empty * by default, can be overriden in child contracts. */ function _baseURI() internal view virtual returns (string memory) { return ''; } /** * @dev See {IERC721-approve}. */ function approve(address to, uint256 tokenId) public override { address owner = ERC721A.ownerOf(tokenId); if (to == owner) revert ApprovalToCurrentOwner(); if (_msgSender() != owner && !isApprovedForAll(owner, _msgSender())) { revert ApprovalCallerNotOwnerNorApproved(); } _approve(to, tokenId, owner); } /** * @dev See {IERC721-getApproved}. */ function getApproved(uint256 tokenId) public view override returns (address) { if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken(); return _tokenApprovals[tokenId]; } /** * @dev See {IERC721-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public override { if (operator == _msgSender()) revert ApproveToCaller(); _operatorApprovals[_msgSender()][operator] = approved; emit ApprovalForAll(_msgSender(), operator, approved); } /** * @dev See {IERC721-isApprovedForAll}. */ function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) { return _operatorApprovals[owner][operator]; } /** * @dev See {IERC721-transferFrom}. */ function transferFrom( address from, address to, uint256 tokenId ) public virtual override { _transfer(from, to, tokenId); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId ) public virtual override { safeTransferFrom(from, to, tokenId, ''); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes memory _data ) public virtual override { _transfer(from, to, tokenId); if (!_checkOnERC721Received(from, to, tokenId, _data)) { revert TransferToNonERC721ReceiverImplementer(); } } /** * @dev Returns whether `tokenId` exists. * * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}. * * Tokens start existing when they are minted (`_mint`), */ function _exists(uint256 tokenId) internal view returns (bool) { return tokenId < _currentIndex && !_ownerships[tokenId].burned; } function _safeMint(address to, uint256 quantity) internal { _safeMint(to, quantity, ''); } /** * @dev Safely mints `quantity` tokens and transfers them to `to`. * * Requirements: * * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called for each safe transfer. * - `quantity` must be greater than 0. * * Emits a {Transfer} event. */ function _safeMint( address to, uint256 quantity, bytes memory _data ) internal { _mint(to, quantity, _data, true); } /** * @dev Mints `quantity` tokens and transfers them to `to`. * * Requirements: * * - `to` cannot be the zero address. * - `quantity` must be greater than 0. * * Emits a {Transfer} event. */ function _mint( address to, uint256 quantity, bytes memory _data, bool safe ) internal { uint256 startTokenId = _currentIndex; if (to == address(0)) revert MintToZeroAddress(); if (quantity == 0) revert MintZeroQuantity(); _beforeTokenTransfers(address(0), to, startTokenId, quantity); // Overflows are incredibly unrealistic. // balance or numberMinted overflow if current value of either + quantity > 3.4e38 (2**128) - 1 // updatedIndex overflows if _currentIndex + quantity > 3.4e38 (2**128) - 1 unchecked { _addressData[to].balance += uint64(quantity); _addressData[to].numberMinted += uint64(quantity); _ownerships[startTokenId].addr = to; _ownerships[startTokenId].startTimestamp = uint64(block.timestamp); uint256 updatedIndex = startTokenId; for (uint256 i; i < quantity; i++) { emit Transfer(address(0), to, updatedIndex); if (safe && !_checkOnERC721Received(address(0), to, updatedIndex, _data)) { revert TransferToNonERC721ReceiverImplementer(); } updatedIndex++; } _currentIndex = uint128(updatedIndex); } _afterTokenTransfers(address(0), to, startTokenId, quantity); } /** * @dev Transfers `tokenId` from `from` to `to`. * * Requirements: * * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * * Emits a {Transfer} event. */ function _transfer( address from, address to, uint256 tokenId ) private { TokenOwnership memory prevOwnership = ownershipOf(tokenId); bool isApprovedOrOwner = (_msgSender() == prevOwnership.addr || isApprovedForAll(prevOwnership.addr, _msgSender()) || getApproved(tokenId) == _msgSender()); if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved(); if (prevOwnership.addr != from) revert TransferFromIncorrectOwner(); if (to == address(0)) revert TransferToZeroAddress(); _beforeTokenTransfers(from, to, tokenId, 1); // Clear approvals from the previous owner _approve(address(0), tokenId, prevOwnership.addr); // Underflow of the sender's balance is impossible because we check for // ownership above and the recipient's balance can't realistically overflow. // Counter overflow is incredibly unrealistic as tokenId would have to be 2**128. unchecked { _addressData[from].balance -= 1; _addressData[to].balance += 1; _ownerships[tokenId].addr = to; _ownerships[tokenId].startTimestamp = uint64(block.timestamp); // If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it. // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls. uint256 nextTokenId = tokenId + 1; if (_ownerships[nextTokenId].addr == address(0)) { // This will suffice for checking _exists(nextTokenId), // as a burned slot cannot contain the zero address. if (nextTokenId < _currentIndex) { _ownerships[nextTokenId].addr = prevOwnership.addr; _ownerships[nextTokenId].startTimestamp = prevOwnership.startTimestamp; } } } emit Transfer(from, to, tokenId); _afterTokenTransfers(from, to, tokenId, 1); } /** * @dev Destroys `tokenId`. * The approval is cleared when the token is burned. * * Requirements: * * - `tokenId` must exist. * * Emits a {Transfer} event. */ function _burn(uint256 tokenId) internal virtual { TokenOwnership memory prevOwnership = ownershipOf(tokenId); _beforeTokenTransfers(prevOwnership.addr, address(0), tokenId, 1); // Clear approvals from the previous owner _approve(address(0), tokenId, prevOwnership.addr); // Underflow of the sender's balance is impossible because we check for // ownership above and the recipient's balance can't realistically overflow. // Counter overflow is incredibly unrealistic as tokenId would have to be 2**128. unchecked { _addressData[prevOwnership.addr].balance -= 1; _addressData[prevOwnership.addr].numberBurned += 1; // Keep track of who burned the token, and the timestamp of burning. _ownerships[tokenId].addr = prevOwnership.addr; _ownerships[tokenId].startTimestamp = uint64(block.timestamp); _ownerships[tokenId].burned = true; // If the ownership slot of tokenId+1 is not explicitly set, that means the burn initiator owns it. // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls. uint256 nextTokenId = tokenId + 1; if (_ownerships[nextTokenId].addr == address(0)) { // This will suffice for checking _exists(nextTokenId), // as a burned slot cannot contain the zero address. if (nextTokenId < _currentIndex) { _ownerships[nextTokenId].addr = prevOwnership.addr; _ownerships[nextTokenId].startTimestamp = prevOwnership.startTimestamp; } } } emit Transfer(prevOwnership.addr, address(0), tokenId); _afterTokenTransfers(prevOwnership.addr, address(0), tokenId, 1); // Overflow not possible, as _burnCounter cannot be exceed _currentIndex times. unchecked { _burnCounter++; } } /** * @dev Approve `to` to operate on `tokenId` * * Emits a {Approval} event. */ function _approve( address to, uint256 tokenId, address owner ) private { _tokenApprovals[tokenId] = to; emit Approval(owner, to, tokenId); } /** * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address. * The call is not executed if the target address is not a contract. * * @param from address representing the previous owner of the given token ID * @param to target address that will receive the tokens * @param tokenId uint256 ID of the token to be transferred * @param _data bytes optional data to send along with the call * @return bool whether the call correctly returned the expected magic value */ function _checkOnERC721Received( address from, address to, uint256 tokenId, bytes memory _data ) private returns (bool) { if (to.isContract()) { try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) { return retval == IERC721Receiver(to).onERC721Received.selector; } catch (bytes memory reason) { if (reason.length == 0) { revert TransferToNonERC721ReceiverImplementer(); } else { assembly { revert(add(32, reason), mload(reason)) } } } } else { return true; } } /** * @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting. * And also called before burning one token. * * startTokenId - the first token id to be transferred * quantity - the amount to be transferred * * Calling conditions: * * - When `from` and `to` are both non-zero, `from`'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. * - When `to` is zero, `tokenId` will be burned by `from`. * - `from` and `to` are never both zero. */ function _beforeTokenTransfers( address from, address to, uint256 startTokenId, uint256 quantity ) internal virtual {} /** * @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes * minting. * And also called after one token has been burned. * * startTokenId - the first token id to be transferred * quantity - the amount to be transferred * * Calling conditions: * * - When `from` and `to` are both non-zero, `from`'s `tokenId` has been * transferred to `to`. * - When `from` is zero, `tokenId` has been minted for `to`. * - When `to` is zero, `tokenId` has been burned by `from`. * - `from` and `to` are never both zero. */ function _afterTokenTransfers( address from, address to, uint256 startTokenId, uint256 quantity ) internal virtual {} } pragma solidity ^0.8.4; contract VaynerSportsPass is ERC721A, Ownable { uint256 constant public MAX_MINT = 15555; uint256 constant public MAX_MINT_PER_TX = 5; uint256 constant public PRICE = 0.155 ether; string public baseURI = ""; address public stakingAddress; bool public paused; constructor() ERC721A("VaynerSportsPass", "VSP") {} function mint(uint256 quantity) external payable { require(!paused, "Sale is currently paused."); require(quantity > 0, "Mint quantity less than 0."); require(totalSupply() + quantity <= MAX_MINT, "Cannot exceed max mint amount."); require(quantity <= MAX_MINT_PER_TX, "Cannot exeeds 10 quantity per tx."); require(msg.value >= quantity * PRICE, "Exceeds mint quantity or not enough eth sent"); _safeMint(msg.sender, quantity); } function adminMint(uint256 quantity) external onlyOwner { require(totalSupply() + quantity <= MAX_MINT, "Cannot exceed max mint amount"); _safeMint(msg.sender, quantity); } function whitelistMint(uint256 quantity) external payable { require(!paused, "Sale is currently paused."); require(quantity > 0, "Mint quantity less than 0."); require(totalSupply() + quantity <= MAX_MINT, "Cannot exceed max mint amount."); require(quantity <= MAX_MINT_PER_TX, "Cannot exeeds 10 quantity per tx."); require(msg.value >= quantity * PRICE, "Exceeds mint quantity or not enough eth sent"); _safeMint(msg.sender, quantity); } function setStakingAddress(address newStakingAddress) external onlyOwner { stakingAddress = newStakingAddress; } function setBaseURI(string calldata uri) external onlyOwner { baseURI = uri; } function toggleSale() external onlyOwner { paused = !paused; } function _baseURI() internal view override returns (string memory) { return baseURI; } function withdraw() external onlyOwner { payable(owner()).transfer(address(this).balance); } }
True
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/** *Submitted for verification at Etherscan.io on 2021-06-19 */ /* // https://porcupine.bond | The easiest way into crypto!! //🌝 0.5% Rewards 🌝 //🤖 Antibot Contract 🤖 //🕓 Cooldown & Initial Limit-Buy 🕓 //🗳 Fair Launch (No Presales) & Community Driven ████████████ ██████████████ ██▒▒▒▒▒▒▒▒▒▒▒▒██ ██▒▒▒▒▒▒▒▒▒▒▒▒▒▒██ ██▓▓▒▒████▒▒▒▒▒▒▓▓██ ██▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▓▓██ ██▒▒██░░░░██▒▒▒▒▒▒██ ██▒▒▒▒▒▒████████▒▒▒▒▒▒██ ██▒▒██░░░░▒▒██▒▒▒▒██ ██▒▒▒▒██▒▒▒▒▒▒▒▒██▒▒▒▒▓▓ ██▒▒██▒▒░░░░██▒▒▒▒▒▒██████████████▒▒▒▒██░░▒▒░░░░░░██▒▒▒▒▒▒▓▓ ██▒▒▓▓██░░░░██▒▒▒▒▒▒▓▓▓▓▓▓▓▓▓▓▓▓▓▓▒▒▒▒██░░░░░░░░▒▒██▒▒▒▒██ ██▒▒██░░░░██▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒██░░░░░░▒▒▒▒██▒▒▒▒██ ██▒▒▓▓▓▓▓▓▓▓▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▓▓▓▓░░▒▒░░▓▓▓▓▒▒██ ██▒▒▓▓▒▒▒▒████▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▓▓██████▒▒▒▒▒▒▓▓██▓▓ ██▒▒▒▒▒▒▒▒██▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▓▓▒▒ ██▒▒██▒▒██▒▒▒▒▒▒▒▒██████▒▒▒▒████▓▓▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▓▓██ ██▒▒██ ██▒▒▓▓██████ ██▒▒██ ██▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒██ ██▒▒██ ██▒▒██░░░░░░ ████░░ ██▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▓▓██ ████ ██▒▒██ ██▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒████████████ ██▓▓ ██ ▓▓▓▓▓▓▓▓▓▓ ████████▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒██▒▒ ██ ▓▓ ▓▓ ▓▓ ██▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▓▓██ ██ ░░ ░░ ░░ ██▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▓▓▓▓▓▓ ████ ▓▓████ ██▓▓▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒██ ██ ██ ██ ▓▓ ██ ██▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒██ ██▒▒██ ██▒▒▒▒ ██ ██▓▓▒▒▒▒▒▒▒▒▒▒▒▒▒▒████████▓▓██▓▓▓▓ ████████████ ██████████ ██▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒██ ████ ██▓▓▓▓██░░░░░░ ░░░░░░░░░░ ▓▓▓▓▒▒▒▒▒▒▓▓▒▒▒▒▒▒▒▒▒▒▒▒▓▓▒▒ ▓▓▓▓▓▓██░░░░░░ ░░ ░░░░░░░░░░░░░░░░░░░░██▓▓██▓▓▒▒▓▓▓▓▓▓▓▓▒▒▒▒▓▓▓▓▓▓▒▒░░ ░░▓▓▓▓▒▒░░░░ ░░░░ ░░ ░░ ░░ ░░ ░░░░▒▒▒▒▓▓▒▒▒▒▓▓▒▒▓▓▒▒▒▒▒▒▒▒▒▒████░░ ██▒▒░░░░░░ ░░░░ ░░ ░░ ░░ ░░░░░░░░ ██▓▓▒▒▓▓▒▒▒▒▒▒▓▓▒▒▒▒▒▒▓▓▓▓▒▒ ██░░░░░░░░ ░░▓▓░░░░ ░░ ░░░░░░░░░░░░ ▓▓▓▓▓▓▒▒▓▓▒▒▒▒▓▓██▓▓██▓▓▓▓▒▒▓▓▓▓ ██▓▓▓▓▓▓▓▓▓▓▓▓▓▓ ▓▓██▓▓▒▒▒▒▒▒▒▒▒▒▒▒▒▒▓▓██ ██▓▓▒▒▒▒██ ██▓▓▓▓▓▓▓▓▓▓ ████████████░░██▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒██ ████▒▒██ ████████████████████░░░░░░▓▓░░░░░░░░██▒▒▒▒▒▒██▒▒▒▒▒▒▒▒██ ████ ██░░██░░▓▓░░░░░░░░▓▓░░░░░░██ ██▒▒▒▒▒▒██▒▒▒▒▒▒▓▓██ ██ ████░░▒▒░░░░░░░░▓▓░░░░██ ██▒▒▒▒▒▒████▒▒▒▒▒▒██ ██ ██░░▓▓░░░░░░░░▓▓░░██ ██▒▒▒▒██ ██▒▒▒▒██ ██ ██░░▓▓░░░░░░░░▓▓░░░░██ ██▒▒▒▒██ ██▒▒██ ██ ██░░▓▓░░░░░░░░▓▓░░░░░░██ ██▒▒██ ████ ██ ██░░░░▓▓░░░░░░░░▓▓░░░░░░████ ██▒▒▒▒██ ██ ████░░░░▓▓░░░░░░░░▓▓░░░░░░██ ▓▓ ░░██▒▒██ ██ ████████████████████████████ ██ ██▓▓██ ████ ██▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒██ ████ ████ ██▒▒▒▒▒▒▒▒▒▒██▒▒▒▒▒▒▒▒▒▒▒▒██ ░░ ▓▓▒▒▒▒▒▒▒▒▒▒▒▒██▒▒▒▒▒▒▒▒▒▒▒▒██ ██▒▒▒▒▒▒▒▒▒▒▒▒██▒▒▒▒▒▒▒▒▒▒▒▒▒▒▓▓ ██▒▒▒▒▒▒▒▒▒▒▒▒██▒▒▒▒▒▒▒▒▒▒▒▒▒▒██ ██▒▒▒▒▒▒▒▒██ ██▒▒▒▒▒▒▒▒▒▒██ ████████ ██████████ ██▓▓██░░ ░░██▓▓██ ██▓▓▓▓██ ██▓▓▓▓██ ████████ ████████ */// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } pragma solidity ^0.8.4; interface IERC20 { function totalSupply() external view returns (uint256); function balanceOf(address account) external view returns (uint256); function transfer(address recipient, uint256 amount) external returns (bool); function allowance(address owner, address spender) external view returns (uint256); function approve(address spender, uint256 amount) external returns (bool); function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); event Approval(address indexed owner, address indexed spender, uint256 value); } pragma solidity ^0.8.4; library SafeMath { function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } pragma solidity ^0.8.4; library Address { function isContract(address account) internal view returns (bool) { bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } pragma solidity ^0.8.4; contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); constructor () { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } function owner() public view returns (address) { return _owner; } modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } pragma solidity ^0.8.4; contract ePORC is Context, IERC20, Ownable { using SafeMath for uint256; using Address for address; mapping (address => uint256) private _rOwned; mapping (address => uint256) private _tOwned; mapping (address => mapping (address => uint256)) private _allowances; mapping (address => bool) private _isExcluded; address[] private _excluded; uint256 private constant MAX = ~uint256(0); uint256 private constant _tTotal = 1000000000000000; uint256 private _rTotal = (MAX - (MAX % _tTotal)); uint256 private _tFeeTotal; string private _name = 'https://porcupine.bond/ | The Easiest Way Into Crypto!'; string private _symbol = 'ePORC'; uint8 private _decimals = 0; constructor () { _rOwned[_msgSender()] = _rTotal; emit Transfer(address(0), _msgSender(), _tTotal); } function name() public view returns (string memory) { return _name; } function symbol() public view returns (string memory) { return _symbol; } function decimals() public view returns (uint8) { return _decimals; } function totalSupply() public pure override returns (uint256) { return _tTotal; } function balanceOf(address account) public view override returns (uint256) { if (_isExcluded[account]) return _tOwned[account]; return tokenFromReflection(_rOwned[account]); } function transfer(address recipient, uint256 amount) public override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } function allowance(address owner, address spender) public view override returns (uint256) { return _allowances[owner][spender]; } function approve(address spender, uint256 amount) public override returns (bool) { _approve(_msgSender(), spender, amount); return true; } function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } function isExcluded(address account) public view returns (bool) { return _isExcluded[account]; } function totalFees() public view returns (uint256) { return _tFeeTotal; } function reflect(uint256 tAmount) public { address sender = _msgSender(); require(!_isExcluded[sender], "Excluded addresses cannot call this function"); (uint256 rAmount,,,,) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rTotal = _rTotal.sub(rAmount); _tFeeTotal = _tFeeTotal.add(tAmount); } function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) { require(tAmount <= _tTotal, "Amount must be less than supply"); if (!deductTransferFee) { (uint256 rAmount,,,,) = _getValues(tAmount); return rAmount; } else { (,uint256 rTransferAmount,,,) = _getValues(tAmount); return rTransferAmount; } } function tokenFromReflection(uint256 rAmount) public view returns(uint256) { require(rAmount <= _rTotal, "Amount must be less than total reflections"); uint256 currentRate = _getRate(); return rAmount.div(currentRate); } function excludeAccount(address account) external onlyOwner() { require(!_isExcluded[account], "Account is already excluded"); if(_rOwned[account] > 0) { _tOwned[account] = tokenFromReflection(_rOwned[account]); } _isExcluded[account] = true; _excluded.push(account); } function includeAccount(address account) external onlyOwner() { require(_isExcluded[account], "Account is already excluded"); for (uint256 i = 0; i < _excluded.length; i++) { if (_excluded[i] == account) { _excluded[i] = _excluded[_excluded.length - 1]; _tOwned[account] = 0; _isExcluded[account] = false; _excluded.pop(); break; } } } function _approve(address owner, address spender, uint256 amount) private { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } function _transfer(address sender, address recipient, uint256 amount) private { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); require(amount > 0, "Transfer amount must be greater than zero"); if (_isExcluded[sender] && !_isExcluded[recipient]) { _transferFromExcluded(sender, recipient, amount); } else if (!_isExcluded[sender] && _isExcluded[recipient]) { _transferToExcluded(sender, recipient, amount); } else if (!_isExcluded[sender] && !_isExcluded[recipient]) { _transferStandard(sender, recipient, amount); } else if (_isExcluded[sender] && _isExcluded[recipient]) { _transferBothExcluded(sender, recipient, amount); } else { _transferStandard(sender, recipient, amount); } } function _transferStandard(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function _transferToExcluded(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount); _tOwned[sender] = _tOwned[sender].sub(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount); _tOwned[sender] = _tOwned[sender].sub(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function _reflectFee(uint256 rFee, uint256 tFee) private { _rTotal = _rTotal.sub(rFee); _tFeeTotal = _tFeeTotal.add(tFee); } function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256) { (uint256 tTransferAmount, uint256 tFee) = _getTValues(tAmount); uint256 currentRate = _getRate(); (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, currentRate); return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee); } function _getTValues(uint256 tAmount) private pure returns (uint256, uint256) { uint256 tFee = tAmount.div(100); uint256 tTransferAmount = tAmount.sub(tFee); return (tTransferAmount, tFee); } function _getRValues(uint256 tAmount, uint256 tFee, uint256 currentRate) private pure returns (uint256, uint256, uint256) { uint256 rAmount = tAmount.mul(currentRate); uint256 rFee = tFee.mul(currentRate); uint256 rTransferAmount = rAmount.sub(rFee); return (rAmount, rTransferAmount, rFee); } function _getRate() private view returns(uint256) { (uint256 rSupply, uint256 tSupply) = _getCurrentSupply(); return rSupply.div(tSupply); } function _getCurrentSupply() private view returns(uint256, uint256) { uint256 rSupply = _rTotal; uint256 tSupply = _tTotal; for (uint256 i = 0; i < _excluded.length; i++) { if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal); rSupply = rSupply.sub(_rOwned[_excluded[i]]); tSupply = tSupply.sub(_tOwned[_excluded[i]]); } if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal); return (rSupply, tSupply); } }
True
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/** *Submitted for verification at Etherscan.io on 2021-03-18 */ // SPDX-License-Identifier: MIT pragma solidity ^0.7.0; pragma solidity >=0.6.0 <0.8.0; /* * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with GSN meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor () { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(owner() == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } pragma solidity ^0.7.0; /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when an * operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) { uint256 c = a + b; if (c < a) return (false, 0); return (true, c); } /** * @dev Returns the substraction of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) { if (b > a) return (false, 0); return (true, a - b); } /** * @dev Returns the multiplication of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) return (true, 0); uint256 c = a * b; if (c / a != b) return (false, 0); return (true, c); } /** * @dev Returns the division of two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) { if (b == 0) return (false, 0); return (true, a / b); } /** * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) { if (b == 0) return (false, 0); return (true, a % b); } /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { require(b <= a, "SafeMath: subtraction overflow"); return a - b; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) return 0; uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers, reverting on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { require(b > 0, "SafeMath: division by zero"); return a / b; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { require(b > 0, "SafeMath: modulo by zero"); return a % b; } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {trySub}. * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); return a - b; } /** * @dev Returns the integer division of two unsigned integers, reverting with custom message on * division by zero. The result is rounded towards zero. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryDiv}. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); return a / b; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting with custom message when dividing by zero. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryMod}. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); return a % b; } } pragma solidity ^0.7.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } pragma solidity ^0.7.0; /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin guidelines: functions revert instead * of returning `false` on failure. This behavior is nonetheless conventional * and does not conflict with the expectations of ERC20 applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20 is Context, IERC20 { using SafeMath for uint256; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; uint8 private _decimals; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ constructor (string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; _decimals = 18; } /** * @dev Returns the name of the token. */ function name() public view virtual returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is * called. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * Requirements: * * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Sets {decimals} to a value other than the default one of 18. * * WARNING: This function should only be called from the constructor. Most * applications that interact with token contracts will not expect * {decimals} to ever change, and may work incorrectly if it does. */ function _setupDecimals(uint8 decimals_) internal virtual { _decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } } pragma solidity ^0.7.0; contract CarbonToken is ERC20, Ownable { /** * @dev Constructor that gives _msgSender() all of existing tokens. */ constructor() ERC20("CARBON", "CRB") { _mint(_msgSender(), 300000000 * (10 ** uint256(decimals()))); } }
True
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/** *Submitted for verification at Etherscan.io on 2022-03-26 */ // SPDX-License-Identifier: MIT // File: contracts/libs/Address.sol pragma solidity ^0.8.0; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require( address(this).balance >= amount, "Address: insufficient balance" ); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{value: amount}(""); require( success, "Address: unable to send value, recipient may have reverted" ); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue( target, data, value, "Address: low-level call with value failed" ); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require( address(this).balance >= value, "Address: insufficient balance for call" ); require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{value: value}( data ); return _verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall( target, data, "Address: low-level static call failed" ); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.staticcall(data); return _verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall( target, data, "Address: low-level delegate call failed" ); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.delegatecall(data); return _verifyCallResult(success, returndata, errorMessage); } function _verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) private pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); while (value != 0) { digits -= 1; buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); value /= 10; } return string(buffer); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0x00"; } uint256 temp = value; uint256 length = 0; while (temp != 0) { length++; temp >>= 8; } return toHexString(value, length); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _HEX_SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } } // File: contracts/libs/IERC20.sol pragma solidity >=0.4.0; interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the token decimals. */ function decimals() external view returns (uint8); /** * @dev Returns the token symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the token name. */ function name() external view returns (string memory); /** * @dev Returns the erc20 token owner. */ function getOwner() external view returns (address); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address _owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address sender, address recipient, uint256 amount ) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } // File: contracts/libs/SafeMath.sol pragma solidity ^0.8.0; /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when an * operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { uint256 c = a + b; if (c < a) return (false, 0); return (true, c); } } /** * @dev Returns the substraction of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b > a) return (false, 0); return (true, a - b); } } /** * @dev Returns the multiplication of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) return (true, 0); uint256 c = a * b; if (c / a != b) return (false, 0); return (true, c); } } /** * @dev Returns the division of two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a / b); } } /** * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a % b); } } /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { return a + b; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return a - b; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { return a * b; } /** * @dev Returns the integer division of two unsigned integers, reverting on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return a / b; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return a % b; } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {trySub}. * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b <= a, errorMessage); return a - b; } } /** * @dev Returns the integer division of two unsigned integers, reverting with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b > 0, errorMessage); return a / b; } } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting with custom message when dividing by zero. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryMod}. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b > 0, errorMessage); return a % b; } } } // File: contracts/libs/SafeERC20.sol pragma solidity ^0.8.0; /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer( IERC20 token, address to, uint256 value ) internal { _callOptionalReturn( token, abi.encodeWithSelector(token.transfer.selector, to, value) ); } function safeTransferFrom( IERC20 token, address from, address to, uint256 value ) internal { _callOptionalReturn( token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value) ); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove( IERC20 token, address spender, uint256 value ) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' // solhint-disable-next-line max-line-length require( (value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn( token, abi.encodeWithSelector(token.approve.selector, spender, value) ); } function safeIncreaseAllowance( IERC20 token, address spender, uint256 value ) internal { uint256 newAllowance = token.allowance(address(this), spender).add( value ); _callOptionalReturn( token, abi.encodeWithSelector( token.approve.selector, spender, newAllowance ) ); } function safeDecreaseAllowance( IERC20 token, address spender, uint256 value ) internal { uint256 newAllowance = token.allowance(address(this), spender).sub( value, "SafeERC20: decreased allowance below zero" ); _callOptionalReturn( token, abi.encodeWithSelector( token.approve.selector, spender, newAllowance ) ); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall( data, "SafeERC20: low-level call failed" ); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require( abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed" ); } } } // File: contracts/libs/EnumerableSet.sol pragma solidity ^0.8.0; /** * @dev Library for managing * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive * types. * * Sets have the following properties: * * - Elements are added, removed, and checked for existence in constant time * (O(1)). * - Elements are enumerated in O(n). No guarantees are made on the ordering. * * ``` * contract Example { * // Add the library methods * using EnumerableSet for EnumerableSet.AddressSet; * * // Declare a set state variable * EnumerableSet.AddressSet private mySet; * } * ``` * * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`) * and `uint256` (`UintSet`) are supported. */ library EnumerableSet { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping(bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; if (lastIndex != toDeleteIndex) { bytes32 lastvalue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastvalue; // Update the index for the moved value set._indexes[lastvalue] = valueIndex; // Replace lastvalue's index to valueIndex } // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { return set._values[index]; } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function _values(Set storage set) private view returns (bytes32[] memory) { return set._values; } // Bytes32Set struct Bytes32Set { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _add(set._inner, value); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _remove(set._inner, value); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) { return _contains(set._inner, value); } /** * @dev Returns the number of values in the set. O(1). */ function length(Bytes32Set storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) { return _at(set._inner, index); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(Bytes32Set storage set) internal view returns (bytes32[] memory) { return _values(set._inner); } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint160(uint256(_at(set._inner, index)))); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(AddressSet storage set) internal view returns (address[] memory) { bytes32[] memory store = _values(set._inner); address[] memory result; assembly { result := store } return result; } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values on the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(UintSet storage set) internal view returns (uint256[] memory) { bytes32[] memory store = _values(set._inner); uint256[] memory result; assembly { result := store } return result; } } // File: contracts/libs/IERC721Receiver.sol pragma solidity ^0.8.0; /** * @title ERC721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC721 asset contracts. */ interface IERC721Receiver { /** * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} * by `operator` from `from`, this function is called. * * It must return its Solidity selector to confirm the token transfer. * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted. * * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`. */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); } // File: contracts/libs/IERC165.sol pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); } // File: contracts/libs/IERC721.sol pragma solidity ^0.8.0; /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes calldata data ) external; } // File: contracts/libs/Context.sol pragma solidity ^0.8.0; /* * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } // File: contracts/libs/Ownable.sol pragma solidity ^0.8.0; abstract contract Ownable is Context { address private _owner; event OwnershipTransferred( address indexed previousOwner, address indexed newOwner ); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(owner() == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require( newOwner != address(0), "Ownable: new owner is the zero address" ); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } } // File: contracts/libs/Pausable.sol pragma solidity ^0.8.0; /** * @dev Contract module which allows children to implement an emergency stop * mechanism that can be triggered by an authorized account. * * This module is used through inheritance. It will make available the * modifiers `whenNotPaused` and `whenPaused`, which can be applied to * the functions of your contract. Note that they will not be pausable by * simply including this module, only once the modifiers are put in place. */ abstract contract Pausable is Ownable { /** * @dev Emitted when the pause is triggered by `account`. */ event Paused(address account); /** * @dev Emitted when the pause is lifted by `account`. */ event Unpaused(address account); bool private _paused; /** * @dev Initializes the contract in unpaused state. */ constructor() { _paused = false; } /** * @dev Returns true if the contract is paused, and false otherwise. */ function paused() public view virtual returns (bool) { return _paused; } /** * @dev Modifier to make a function callable only when the contract is not paused. * * Requirements: * * - The contract must not be paused. */ modifier whenNotPaused() { require(!paused(), "Pausable: paused"); _; } /** * @dev Modifier to make a function callable only when the contract is paused. * * Requirements: * * - The contract must be paused. */ modifier whenPaused() { require(paused(), "Pausable: not paused"); _; } /** * @dev Triggers stopped state. * * Requirements: * * - The contract must not be paused. */ function pause() external onlyOwner whenNotPaused { _paused = true; emit Paused(_msgSender()); } /** * @dev Returns to normal state. * * Requirements: * * - The contract must be paused. */ function _unpause() external onlyOwner whenPaused { _paused = false; emit Unpaused(_msgSender()); } } // File: contracts/libs/ReentrancyGuard.sol pragma solidity ^0.8.0; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; constructor() { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and make it call a * `private` function that does the actual work. */ modifier nonReentrant() { // On the first call to nonReentrant, _notEntered will be true require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; _; // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } } pragma solidity ^0.8.0; /** * @dev These functions deal with verification of Merkle Trees proofs. * * The proofs can be generated using the JavaScript library * https://github.com/miguelmota/merkletreejs[merkletreejs]. * Note: the hashing algorithm should be keccak256 and pair sorting should be enabled. * * See `test/utils/cryptography/MerkleProof.test.js` for some examples. */ library MerkleProof { /** * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree * defined by `root`. For this, a `proof` must be provided, containing * sibling hashes on the branch from the leaf to the root of the tree. Each * pair of leaves and each pair of pre-images are assumed to be sorted. */ function verify( bytes32[] memory proof, bytes32 root, bytes32 leaf ) internal pure returns (bool) { return processProof(proof, leaf) == root; } /** * @dev Returns the rebuilt hash obtained by traversing a Merklee tree up * from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt * hash matches the root of the tree. When processing the proof, the pairs * of leafs & pre-images are assumed to be sorted. * * _Available since v4.4._ */ function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) { bytes32 computedHash = leaf; for (uint256 i = 0; i < proof.length; i++) { bytes32 proofElement = proof[i]; if (computedHash <= proofElement) { // Hash(current computed hash + current element of the proof) computedHash = _efficientHash(computedHash, proofElement); } else { // Hash(current element of the proof + current computed hash) computedHash = _efficientHash(proofElement, computedHash); } } return computedHash; } function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) { assembly { mstore(0x00, a) mstore(0x20, b) value := keccak256(0x00, 0x40) } } } library ECDSA { enum RecoverError { NoError, InvalidSignature, InvalidSignatureLength, InvalidSignatureS, InvalidSignatureV } function _throwError(RecoverError error) private pure { if (error == RecoverError.NoError) { return; // no error: do nothing } else if (error == RecoverError.InvalidSignature) { revert("ECDSA: invalid signature"); } else if (error == RecoverError.InvalidSignatureLength) { revert("ECDSA: invalid signature length"); } else if (error == RecoverError.InvalidSignatureS) { revert("ECDSA: invalid signature 's' value"); } else if (error == RecoverError.InvalidSignatureV) { revert("ECDSA: invalid signature 'v' value"); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature` or error string. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. * * Documentation for signature generation: * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js] * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers] * * _Available since v4.3._ */ function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) { // Check the signature length // - case 65: r,s,v signature (standard) // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._ if (signature.length == 65) { bytes32 r; bytes32 s; uint8 v; // ecrecover takes the signature parameters, and the only way to get them // currently is to use assembly. assembly { r := mload(add(signature, 0x20)) s := mload(add(signature, 0x40)) v := byte(0, mload(add(signature, 0x60))) } return tryRecover(hash, v, r, s); } else if (signature.length == 64) { bytes32 r; bytes32 vs; // ecrecover takes the signature parameters, and the only way to get them // currently is to use assembly. assembly { r := mload(add(signature, 0x20)) vs := mload(add(signature, 0x40)) } return tryRecover(hash, r, vs); } else { return (address(0), RecoverError.InvalidSignatureLength); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature`. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. */ function recover(bytes32 hash, bytes memory signature) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, signature); _throwError(error); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately. * * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures] * * _Available since v4.3._ */ function tryRecover( bytes32 hash, bytes32 r, bytes32 vs ) internal pure returns (address, RecoverError) { bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff); uint8 v = uint8((uint256(vs) >> 255) + 27); return tryRecover(hash, v, r, s); } /** * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately. * * _Available since v4.2._ */ function recover( bytes32 hash, bytes32 r, bytes32 vs ) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, r, vs); _throwError(error); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `v`, * `r` and `s` signature fields separately. * * _Available since v4.3._ */ function tryRecover( bytes32 hash, uint8 v, bytes32 r, bytes32 s ) internal pure returns (address, RecoverError) { // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most // signatures from current libraries generate a unique signature with an s-value in the lower half order. // // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept // these malleable signatures as well. if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) { return (address(0), RecoverError.InvalidSignatureS); } if (v != 27 && v != 28) { return (address(0), RecoverError.InvalidSignatureV); } // If the signature is valid (and not malleable), return the signer address address signer = ecrecover(hash, v, r, s); if (signer == address(0)) { return (address(0), RecoverError.InvalidSignature); } return (signer, RecoverError.NoError); } /** * @dev Overload of {ECDSA-recover} that receives the `v`, * `r` and `s` signature fields separately. */ function recover( bytes32 hash, uint8 v, bytes32 r, bytes32 s ) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, v, r, s); _throwError(error); return recovered; } /** * @dev Returns an Ethereum Signed Message, created from a `hash`. This * produces hash corresponding to the one signed with the * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] * JSON-RPC method as part of EIP-191. * * See {recover}. */ function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) { // 32 is the length in bytes of hash, // enforced by the type signature above return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash)); } /** * @dev Returns an Ethereum Signed Message, created from `s`. This * produces hash corresponding to the one signed with the * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] * JSON-RPC method as part of EIP-191. * * See {recover}. */ function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) { return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s)); } /** * @dev Returns an Ethereum Signed Typed Data, created from a * `domainSeparator` and a `structHash`. This produces hash corresponding * to the one signed with the * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`] * JSON-RPC method as part of EIP-712. * * See {recover}. */ function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) { return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash)); } } abstract contract EIP712 { /* solhint-disable var-name-mixedcase */ // Cache the domain separator as an immutable value, but also store the chain id that it corresponds to, in order to // invalidate the cached domain separator if the chain id changes. bytes32 private immutable _CACHED_DOMAIN_SEPARATOR; uint256 private immutable _CACHED_CHAIN_ID; address private immutable _CACHED_THIS; bytes32 private immutable _HASHED_NAME; bytes32 private immutable _HASHED_VERSION; bytes32 private immutable _TYPE_HASH; /* solhint-enable var-name-mixedcase */ /** * @dev Initializes the domain separator and parameter caches. * * The meaning of `name` and `version` is specified in * https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]: * * - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol. * - `version`: the current major version of the signing domain. * * NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart * contract upgrade]. */ constructor(string memory name, string memory version) { bytes32 hashedName = keccak256(bytes(name)); bytes32 hashedVersion = keccak256(bytes(version)); bytes32 typeHash = keccak256( "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)" ); _HASHED_NAME = hashedName; _HASHED_VERSION = hashedVersion; _CACHED_CHAIN_ID = block.chainid; _CACHED_DOMAIN_SEPARATOR = _buildDomainSeparator(typeHash, hashedName, hashedVersion); _CACHED_THIS = address(this); _TYPE_HASH = typeHash; } /** * @dev Returns the domain separator for the current chain. */ function _domainSeparatorV4() internal view returns (bytes32) { if (address(this) == _CACHED_THIS && block.chainid == _CACHED_CHAIN_ID) { return _CACHED_DOMAIN_SEPARATOR; } else { return _buildDomainSeparator(_TYPE_HASH, _HASHED_NAME, _HASHED_VERSION); } } function _buildDomainSeparator( bytes32 typeHash, bytes32 nameHash, bytes32 versionHash ) private view returns (bytes32) { return keccak256(abi.encode(typeHash, nameHash, versionHash, block.chainid, address(this))); } /** * @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this * function returns the hash of the fully encoded EIP712 message for this domain. * * This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example: * * ```solidity * bytes32 digest = _hashTypedDataV4(keccak256(abi.encode( * keccak256("Mail(address to,string contents)"), * mailTo, * keccak256(bytes(mailContents)) * ))); * address signer = ECDSA.recover(digest, signature); * ``` */ function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) { return ECDSA.toTypedDataHash(_domainSeparatorV4(), structHash); } } pragma solidity ^0.8.0; contract NftStaking is EIP712, ReentrancyGuard, Pausable, IERC721Receiver { string private constant SIGNING_DOMAIN = "WEB3CLUB"; string private constant SIGNATURE_VERSION = "1"; using SafeMath for uint256; using EnumerableSet for EnumerableSet.UintSet; using SafeERC20 for IERC20; address public constant DEAD = 0x000000000000000000000000000000000000dEaD; enum Rarity { GENESIS, VALOROUS, EXTRATERRESTRIAL, ICONIC, ALMIGHTY } enum StakeType { UNLOCKED, LOCKED, PAIR_LOCKED } bytes32 public SEASON1_MERKLE_ROOT; bytes32 public SEASON2_MERKLE_ROOT; /** Season1 / Season2 NFT address */ address public _season1Nft; address public _season2Nft; /** Reward Token address */ address public _rewardToken; // Withdraw lock period uint256 public _lockPeriod = 60 days; // Lock period 60 days uint16 public _unstakeFee = 400; // Unstake fee 4% uint16 public _forcedUnstakeFee = 10000; // Force unstake fee 100% address private whitelistVerify = 0xbF3e689B25F460F695FC5a6715aA9c74de79e52F; struct NftStakeInfo { Rarity _rarity; bool _isLocked; uint256 _pairedTokenId; uint256 _stakedAt; } struct UserInfo { EnumerableSet.UintSet _season1Nfts; EnumerableSet.UintSet _season2Nfts; mapping(uint256 => NftStakeInfo) _season1StakeInfos; mapping(uint256 => NftStakeInfo) _season2StakeInfos; uint256 _pending; // Not claimed uint256 _totalClaimed; // Claimed so far uint256 _lastClaimedAt; uint256 _pairCount; // Paired count } mapping(Rarity => uint256) _season1BaseRpds; // RPD: reward per day mapping(Rarity => uint16) _season1LockedExtras; mapping(Rarity => mapping(StakeType => uint16)) _season2Extras; // Info of each user that stakes LP tokens. mapping(address => UserInfo) private _userInfo; event Staked( address indexed account, uint256 tokenId, bool isSeason1, bool isLocked ); event Unstaked(address indexed account, uint256 tokenId, bool isSeason1); event Locked(address indexed account, uint256 tokenId, bool isSeason1); event Paired( address indexed account, uint256 season1TokenId, uint256 season2TokenId ); event Harvested(address indexed account, uint256 amount); event InsufficientRewardToken( address indexed account, uint256 amountNeeded, uint256 balance ); constructor(address __rewardToken, address __season1Nft) EIP712(SIGNING_DOMAIN, SIGNATURE_VERSION){ IERC20(__rewardToken).balanceOf(address(this)); IERC721(__season1Nft).balanceOf(address(this)); _rewardToken = __rewardToken; _season1Nft = __season1Nft; // Base reward per day _season1BaseRpds[Rarity.GENESIS] = 15 ether; _season1BaseRpds[Rarity.VALOROUS] = 30 ether; _season1BaseRpds[Rarity.EXTRATERRESTRIAL] = 30 ether; _season1BaseRpds[Rarity.ICONIC] = 45 ether; _season1BaseRpds[Rarity.ALMIGHTY] = 70 ether; // Season1 locked cases extra percentage _season1LockedExtras[Rarity.GENESIS] = 2500; // 25% _season1LockedExtras[Rarity.VALOROUS] = 2500; // 25% _season1LockedExtras[Rarity.EXTRATERRESTRIAL] = 2500; // 25% _season1LockedExtras[Rarity.ICONIC] = 2500; // 25% _season1LockedExtras[Rarity.ALMIGHTY] = 2500; // 25% } function setSeason2Nft(address __season2Nft) external onlyOwner { IERC721(__season2Nft).balanceOf(address(this)); _season2Nft = __season2Nft; } function getRewardInNormal( uint256 __rpd, uint256 __stakedAt, uint256 __lastClaimedAt ) private view returns (uint256) { uint256 timePassed = __stakedAt > __lastClaimedAt ? block.timestamp.sub(__stakedAt) : block.timestamp.sub(__lastClaimedAt); return __rpd.mul(timePassed).div(1 days); } function getRewardInLocked( uint256 __rpd, uint256 __extraRate, uint256 __stakedAt, uint256 __lastClaimedAt ) private view returns (uint256 lockedAmount, uint256 unlockedAmount) { uint256 lockEndAt = __stakedAt.add(_lockPeriod); if (lockEndAt > block.timestamp) { lockedAmount = __rpd .mul(block.timestamp.sub(__stakedAt)) .mul(uint256(10000).add(__extraRate)) .div(10000) .div(1 days); } else { uint256 timePassed = __lastClaimedAt >= lockEndAt ? block.timestamp.sub(__lastClaimedAt) : block.timestamp.sub(__stakedAt); unlockedAmount = __rpd .mul(timePassed) .mul(uint256(10000).add(__extraRate)) .div(10000) .div(1 days); } } function getSeason1Rewards(address __account, uint256 __nftId) private view returns (uint256 lockedAmount, uint256 unlockedAmount) { UserInfo storage user = _userInfo[__account]; NftStakeInfo storage season1StakeInfo = user._season1StakeInfos[ __nftId ]; Rarity season1Rarity = season1StakeInfo._rarity; uint256 baseRpd = _season1BaseRpds[season1Rarity]; // For the locked staking add extra percentage if (season1StakeInfo._isLocked) { (lockedAmount, unlockedAmount) = getRewardInLocked( baseRpd, _season1LockedExtras[season1Rarity], season1StakeInfo._stakedAt, user._lastClaimedAt ); } else { unlockedAmount = getRewardInNormal( baseRpd, season1StakeInfo._stakedAt, user._lastClaimedAt ); } } function getPairedSeason2Rewards(address __account, uint256 __nftId) private view returns (uint256 lockedAmount, uint256 unlockedAmount) { UserInfo storage user = _userInfo[__account]; NftStakeInfo storage season1StakeInfo = user._season1StakeInfos[ __nftId ]; NftStakeInfo storage season2StakeInfo = user._season2StakeInfos[ season1StakeInfo._pairedTokenId ]; Rarity season1Rarity = season1StakeInfo._rarity; Rarity season2Rarity = season2StakeInfo._rarity; uint256 baseRpd = _season1BaseRpds[season1Rarity]; if (season1StakeInfo._pairedTokenId == 0) { lockedAmount = 0; unlockedAmount = 0; } else if (season2StakeInfo._isLocked) { // extra rate is wheter season1 is locked or not uint256 rpdExtraRate = season1StakeInfo._isLocked ? _season2Extras[season2Rarity][StakeType.PAIR_LOCKED] : _season2Extras[season2Rarity][StakeType.LOCKED]; (lockedAmount, unlockedAmount) = getRewardInLocked( baseRpd, rpdExtraRate, season2StakeInfo._stakedAt, user._lastClaimedAt ); } else { // base rpd for the season2 unlocked baseRpd = baseRpd .mul(_season2Extras[season2Rarity][StakeType.UNLOCKED]) .div(10000); unlockedAmount = getRewardInNormal( baseRpd, season2StakeInfo._stakedAt, user._lastClaimedAt ); } } function viewProfit(address __account) public view returns ( uint256 totalEarned, uint256 totalClaimed, uint256 lockedRewards, uint256 unlockedRewards ) { UserInfo storage user = _userInfo[__account]; totalClaimed = user._totalClaimed; unlockedRewards = user._pending; uint256 countSeason1Nfts = user._season1Nfts.length(); uint256 index; for (index = 0; index < countSeason1Nfts; index++) { uint256 pendingLockedRewards = 0; uint256 pendingUnlockedRewards = 0; (pendingLockedRewards, pendingUnlockedRewards) = getSeason1Rewards( __account, user._season1Nfts.at(index) ); // Add season1 reward if (pendingLockedRewards > 0) { lockedRewards = lockedRewards.add(pendingLockedRewards); } if (pendingUnlockedRewards > 0) { unlockedRewards = unlockedRewards.add(pendingUnlockedRewards); } ( pendingLockedRewards, pendingUnlockedRewards ) = getPairedSeason2Rewards(__account, user._season1Nfts.at(index)); // Add season2 reward if (pendingLockedRewards > 0) { lockedRewards = lockedRewards.add(pendingLockedRewards); } if (pendingUnlockedRewards > 0) { unlockedRewards = unlockedRewards.add(pendingUnlockedRewards); } } totalEarned = totalClaimed.add(lockedRewards).add(unlockedRewards); } /** * @notice Get season1 nfts */ function viewSeason1Nfts(address __account) external view returns (uint256[] memory season1Nfts, bool[] memory lockStats) { UserInfo storage user = _userInfo[__account]; uint256 countSeason1Nfts = user._season1Nfts.length(); season1Nfts = new uint256[](countSeason1Nfts); lockStats = new bool[](countSeason1Nfts); uint256 index; uint256 tokenId; for (index = 0; index < countSeason1Nfts; index++) { tokenId = user._season1Nfts.at(index); season1Nfts[index] = tokenId; lockStats[index] = user._season1StakeInfos[tokenId]._isLocked; } } /** * @notice Get season2 nfts */ function viewSeason2Nfts(address __account) external view returns (uint256[] memory season2Nfts, bool[] memory lockStats) { UserInfo storage user = _userInfo[__account]; uint256 countSeason2Nfts = user._season2Nfts.length(); season2Nfts = new uint256[](countSeason2Nfts); lockStats = new bool[](countSeason2Nfts); uint256 index; uint256 tokenId; for (index = 0; index < countSeason2Nfts; index++) { tokenId = user._season2Nfts.at(index); season2Nfts[index] = tokenId; lockStats[index] = user._season2StakeInfos[tokenId]._isLocked; } } /** * @notice Get paired season1 / season2 nfts */ function viewPairedNfts(address __account) external view returns ( uint256[] memory pairedSeason1Nfts, uint256[] memory pairedSeason2Nfts ) { UserInfo storage user = _userInfo[__account]; uint256 pairCount = user._pairCount; pairedSeason1Nfts = new uint256[](pairCount); pairedSeason2Nfts = new uint256[](pairCount); uint256 index; uint256 tokenId; uint256 rindex = 0; uint256 season2NftCount = user._season2Nfts.length(); for (index = 0; index < season2NftCount; index++) { tokenId = user._season2Nfts.at(index); if (user._season2StakeInfos[tokenId]._pairedTokenId == 0) { continue; } pairedSeason1Nfts[rindex] = user ._season2StakeInfos[tokenId] ._pairedTokenId; pairedSeason2Nfts[rindex] = tokenId; rindex = rindex.add(1); } } // Verify that a given leaf is in the tree. function isWhiteListedSeason1(bytes32 _leafNode, bytes32[] memory _proof) public view returns (bool) { return MerkleProof.verify(_proof, SEASON1_MERKLE_ROOT, _leafNode); } function isWhiteListedSeason2(bytes32 _leafNode, bytes32[] memory _proof) public view returns (bool) { return MerkleProof.verify(_proof, SEASON2_MERKLE_ROOT, _leafNode); } // Generate the leaf node (just the hash of tokenID concatenated with the account address) function toLeaf( uint256 tokenID, uint256 index, uint256 amount ) public pure returns (bytes32) { return keccak256(abi.encodePacked(index, tokenID, amount)); } function setMerkleRoot(bytes32 _season1Root, bytes32 _season2Root) external onlyOwner { SEASON1_MERKLE_ROOT = _season1Root; SEASON2_MERKLE_ROOT = _season2Root; } function updateFeeValues(uint16 __unstakeFee, uint16 __forcedUnstakeFee) external onlyOwner { _unstakeFee = __unstakeFee; _forcedUnstakeFee = __forcedUnstakeFee; } function updateWhitelistVerify(address _temp) external onlyOwner{ whitelistVerify = _temp; } function updateLockPeriod(uint256 __lockPeriod) external onlyOwner { require(__lockPeriod > 0, "Invalid lock period"); _lockPeriod = __lockPeriod; } function updateSeason1BaseRpd(Rarity __rarity, uint256 __rpd) external onlyOwner { require(__rpd > 0, "Non zero values required"); _season1BaseRpds[__rarity] = __rpd; } function updateSeason1LockedExtraPercent( Rarity __rarity, uint16 __lockedExtraPercent ) external onlyOwner { _season1LockedExtras[__rarity] = __lockedExtraPercent; } function updateSeason2ExtraPercent( Rarity __rarity, StakeType __stakeType, uint16 __extraPercent ) external onlyOwner { _season2Extras[__rarity][__stakeType] = __extraPercent; } function isStaked(address __account, uint256 __tokenId) external view returns (bool) { UserInfo storage user = _userInfo[__account]; return user._season1Nfts.contains(__tokenId) || user._season2Nfts.contains(__tokenId); } /** * @notice Claim rewards */ function claimRewards() external { UserInfo storage user = _userInfo[_msgSender()]; (, , , uint256 unlockedRewards) = viewProfit(_msgSender()); if (unlockedRewards > 0) { uint256 feeAmount = unlockedRewards.mul(_unstakeFee).div(10000); if (feeAmount > 0) { IERC20(_rewardToken).safeTransfer(DEAD, feeAmount); unlockedRewards = unlockedRewards.sub(feeAmount); } if (unlockedRewards > 0) { user._totalClaimed = user._totalClaimed.add(unlockedRewards); IERC20(_rewardToken).safeTransfer(_msgSender(), unlockedRewards); } } user._lastClaimedAt = block.timestamp; } /** * @notice Stake season1 nft */ function stakeSeason1( bool __lockedStaking, uint256[] calldata __tokenIDList, uint256[] calldata __rarityList, bytes[] memory signature, uint256[] calldata ids ) external nonReentrant whenNotPaused { require( IERC721(_season1Nft).isApprovedForAll(_msgSender(), address(this)), "Not approve nft to staker address" ); UserInfo storage user = _userInfo[_msgSender()]; for (uint256 i = 0; i < __tokenIDList.length; i++) { // Check if the params are correct require(check(ids[i],__rarityList[i],signature[i]) == whitelistVerify, "Error, Try Again."); IERC721(_season1Nft).safeTransferFrom( _msgSender(), address(this), __tokenIDList[i] ); user._season1Nfts.add(__tokenIDList[i]); user._season1StakeInfos[__tokenIDList[i]] = NftStakeInfo({ _rarity: Rarity(__rarityList[i]), _isLocked: __lockedStaking, _stakedAt: block.timestamp, _pairedTokenId: 0 }); emit Staked(_msgSender(), __tokenIDList[i], true, __lockedStaking); } } function check(uint256 id, uint256 rarityId, bytes memory signature) public view returns(address){ return _verify(id, rarityId,signature); } function _verify(uint256 id, uint256 rarityId, bytes memory signature) internal view returns(address){ bytes32 digest = _hash(id,rarityId); return ECDSA.recover(digest, signature); } function _hash(uint256 id,uint256 rarityId) internal view returns(bytes32){ return _hashTypedDataV4(keccak256(abi.encode( keccak256("EIP712Domain(uint256 id,uint256 rarityId)"), id, rarityId ))); } /** * @notice Stake season2 nft */ function stakeSeason2( bool __lockedStaking, uint256[] calldata __tokenIDList, uint256[] calldata __indexList, uint256[] calldata __rarityList, bytes32[][] calldata __proofList ) external nonReentrant whenNotPaused { require( IERC721(_season2Nft).isApprovedForAll(_msgSender(), address(this)), "Not approve nft to staker address" ); UserInfo storage user = _userInfo[_msgSender()]; for (uint256 i = 0; i < __tokenIDList.length; i++) { // Check if the params are correct require( isWhiteListedSeason2( toLeaf(__tokenIDList[i], __indexList[i], __rarityList[i]), __proofList[i] ), "Invalid params" ); IERC721(_season2Nft).safeTransferFrom( _msgSender(), address(this), __tokenIDList[i] ); user._season2Nfts.add(__tokenIDList[i]); user._season2StakeInfos[__tokenIDList[i]] = NftStakeInfo({ _rarity: Rarity(__rarityList[i]), _isLocked: __lockedStaking, _stakedAt: block.timestamp, _pairedTokenId: 0 }); emit Staked(_msgSender(), __tokenIDList[i], false, __lockedStaking); } } function unstakeSeason1(uint256[] calldata __tokenIDList) external nonReentrant { UserInfo storage user = _userInfo[_msgSender()]; for (uint256 i = 0; i < __tokenIDList.length; i++) { require( user._season1Nfts.contains(__tokenIDList[i]), "Not staked one of nfts" ); IERC721(_season1Nft).safeTransferFrom( address(this), _msgSender(), __tokenIDList[i] ); // locked rewards are sent to rewards back to the pool // unlocked rewards are added to the user rewards (, uint256 unlockedRewards) = getSeason1Rewards( _msgSender(), __tokenIDList[i] ); user._pending = user._pending.add(unlockedRewards); user._season1Nfts.remove(__tokenIDList[i]); // If it was paired with a season2 nft, unpair them uint256 pairedTokenId = user ._season1StakeInfos[__tokenIDList[i]] ._pairedTokenId; if (pairedTokenId > 0) { user._season2StakeInfos[pairedTokenId]._pairedTokenId = 0; user._pairCount = user._pairCount.sub(1); } delete user._season1StakeInfos[__tokenIDList[i]]; emit Unstaked(_msgSender(), __tokenIDList[i], true); } } function unstakeSeason2(uint256[] calldata __tokenIDList) external nonReentrant { UserInfo storage user = _userInfo[_msgSender()]; for (uint256 i = 0; i < __tokenIDList.length; i++) { require( user._season2Nfts.contains(__tokenIDList[i]), "Not staked one of nfts" ); IERC721(_season2Nft).safeTransferFrom( address(this), _msgSender(), __tokenIDList[i] ); // If it was paired with a season1 nft, unpair them uint256 pairedTokenId = user ._season2StakeInfos[__tokenIDList[i]] ._pairedTokenId; if (pairedTokenId > 0) { // locked rewards are sent to rewards back to the pool // unlocked rewards are added to the user rewards (, uint256 unlockedRewards) = getPairedSeason2Rewards( _msgSender(), pairedTokenId ); user._pending = user._pending.add(unlockedRewards); } user._season2Nfts.remove(__tokenIDList[i]); if (pairedTokenId > 0) { user._season1StakeInfos[pairedTokenId]._pairedTokenId = 0; user._pairCount = user._pairCount.sub(1); } delete user._season2StakeInfos[__tokenIDList[i]]; emit Unstaked(_msgSender(), __tokenIDList[i], false); } } /** * @notice Lock season1 nft from the unlocked pool to the lock pool */ function lockSeason1Nfts(uint256[] calldata __tokenIDList) external onlyOwner { UserInfo storage user = _userInfo[_msgSender()]; for (uint256 i = 0; i < __tokenIDList.length; i++) { // Check if the params are correct require( user._season1Nfts.contains(__tokenIDList[i]), "One of nfts not staked yet" ); require( !user._season1StakeInfos[__tokenIDList[i]]._isLocked, "Locked already" ); (, uint256 unlockedRewards) = getSeason1Rewards( _msgSender(), __tokenIDList[i] ); user._pending = user._pending.add(unlockedRewards); user._season1StakeInfos[__tokenIDList[i]]._isLocked = true; user._season1StakeInfos[__tokenIDList[i]]._stakedAt = block .timestamp; emit Locked(_msgSender(), __tokenIDList[i], true); } } /** * @notice Lock season2 nft from the unlocked pool to the lock pool */ function lockSeason2Nfts(uint256[] calldata __tokenIDList) external onlyOwner { UserInfo storage user = _userInfo[_msgSender()]; for (uint256 i = 0; i < __tokenIDList.length; i++) { // Check if the params are correct require( user._season2Nfts.contains(__tokenIDList[i]), "One of nfts not staked yet" ); require( !user._season2StakeInfos[__tokenIDList[i]]._isLocked, "Locked already" ); uint256 pairedTokenId = user ._season2StakeInfos[__tokenIDList[i]] ._pairedTokenId; if (pairedTokenId > 0) { (, uint256 unlockedRewards) = getPairedSeason2Rewards( _msgSender(), pairedTokenId ); user._pending = user._pending.add(unlockedRewards); } user._season2StakeInfos[__tokenIDList[i]]._isLocked = true; user._season2StakeInfos[__tokenIDList[i]]._stakedAt = block .timestamp; emit Locked(_msgSender(), __tokenIDList[i], false); } } /** * @notice */ function pairNfts(uint256 __season1TokenID, uint256 __season2TokenID) external nonReentrant whenNotPaused { UserInfo storage user = _userInfo[_msgSender()]; require( user._season1Nfts.contains(__season1TokenID) && user._season2Nfts.contains(__season2TokenID), "One of nfts is not staked" ); require( user._season1StakeInfos[__season1TokenID]._pairedTokenId == 0 && user._season2StakeInfos[__season2TokenID]._pairedTokenId == 0, "Already paired" ); user ._season1StakeInfos[__season1TokenID] ._pairedTokenId = __season2TokenID; user ._season2StakeInfos[__season2TokenID] ._pairedTokenId = __season1TokenID; user._season2StakeInfos[__season2TokenID]._stakedAt = block.timestamp; user._pairCount = user._pairCount.add(1); emit Paired(_msgSender(), __season1TokenID, __season2TokenID); } function safeRewardTransfer(address __to, uint256 __amount) internal returns (uint256) { uint256 balance = IERC20(_rewardToken).balanceOf(address(this)); if (balance >= __amount) { IERC20(_rewardToken).safeTransfer(__to, __amount); return __amount; } if (balance > 0) { IERC20(_rewardToken).safeTransfer(__to, balance); } emit InsufficientRewardToken(__to, __amount, balance); return balance; } function onERC721Received( address, address, uint256, bytes memory ) public virtual override returns (bytes4) { return this.onERC721Received.selector; } }
True
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/** *Submitted for verification at Etherscan.io on 2022-03-11 */ /* The King Kong $BOBAKONG Max transaction - 2% Max Wallet - 4% Total Tax - 12% Join Community below for the Official $BOBAKONG Contract -Web: www.bobakong.com -Tg Portal: https://t.me/bobakong -Twitter: https://twitter.com/Boba_kong */ // SPDX-License-Identifier: Unlicensed pragma solidity ^0.8.9; abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } } interface IERC20 { function totalSupply() external view returns (uint256); function balanceOf(address account) external view returns (uint256); function transfer(address recipient, uint256 amount) external returns (bool); function allowance(address owner, address spender) external view returns (uint256); function approve(address spender, uint256 amount) external returns (bool); function transferFrom( address sender, address recipient, uint256 amount ) external returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); event Approval( address indexed owner, address indexed spender, uint256 value ); } contract Ownable is Context { address private _owner; address private _previousOwner; event OwnershipTransferred( address indexed previousOwner, address indexed newOwner ); constructor() { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } function owner() public view returns (address) { return _owner; } modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } library SafeMath { function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } function sub( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } function div( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; return c; } } interface IUniswapV2Factory { function createPair(address tokenA, address tokenB) external returns (address pair); } interface IUniswapV2Router02 { function swapExactTokensForETHSupportingFeeOnTransferTokens( uint256 amountIn, uint256 amountOutMin, address[] calldata path, address to, uint256 deadline ) external; function factory() external pure returns (address); function WETH() external pure returns (address); function addLiquidityETH( address token, uint256 amountTokenDesired, uint256 amountTokenMin, uint256 amountETHMin, address to, uint256 deadline ) external payable returns ( uint256 amountToken, uint256 amountETH, uint256 liquidity ); } contract bobakongcontract is Context, IERC20, Ownable { using SafeMath for uint256; string private constant _name = "Boba Kong"; string private constant _symbol = "BOBAKONG"; uint8 private constant _decimals = 9; mapping(address => uint256) private _rOwned; mapping(address => uint256) private _tOwned; mapping(address => mapping(address => uint256)) private _allowances; mapping(address => bool) private _isExcludedFromFee; uint256 private constant MAX = ~uint256(0); uint256 private constant _tTotal = 1000000000 * 10**9; uint256 private _rTotal = (MAX - (MAX % _tTotal)); uint256 private _tFeeTotal; uint256 private _redisFeeOnBuy = 1; uint256 private _taxFeeOnBuy = 11; uint256 private _redisFeeOnSell = 1; uint256 private _taxFeeOnSell = 11; //Original Fee uint256 private _redisFee = _redisFeeOnSell; uint256 private _taxFee = _taxFeeOnSell; uint256 private _previousredisFee = _redisFee; uint256 private _previoustaxFee = _taxFee; mapping(address => bool) public bots; mapping (address => uint256) public _buyMap; address payable private _developmentAddress = payable(0xF94ff4658b6d1B0a59C4825E3EFF528b0B28Cc6b); address payable private _marketingAddress = payable(0xF94ff4658b6d1B0a59C4825E3EFF528b0B28Cc6b); IUniswapV2Router02 public uniswapV2Router; address public uniswapV2Pair; bool private tradingOpen; bool private inSwap = false; bool private swapEnabled = true; uint256 public _maxTxAmount = 20000000 * 10**9; uint256 public _maxWalletSize = 40000000 * 10**9; uint256 public _swapTokensAtAmount = 10000 * 10**9; event MaxTxAmountUpdated(uint256 _maxTxAmount); modifier lockTheSwap { inSwap = true; _; inSwap = false; } constructor() { _rOwned[_msgSender()] = _rTotal; IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);// uniswapV2Router = _uniswapV2Router; uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()) .createPair(address(this), _uniswapV2Router.WETH()); _isExcludedFromFee[owner()] = true; _isExcludedFromFee[address(this)] = true; _isExcludedFromFee[_developmentAddress] = true; _isExcludedFromFee[_marketingAddress] = true; emit Transfer(address(0), _msgSender(), _tTotal); } function name() public pure returns (string memory) { return _name; } function symbol() public pure returns (string memory) { return _symbol; } function decimals() public pure returns (uint8) { return _decimals; } function totalSupply() public pure override returns (uint256) { return _tTotal; } function balanceOf(address account) public view override returns (uint256) { return tokenFromReflection(_rOwned[account]); } function transfer(address recipient, uint256 amount) public override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } function allowance(address owner, address spender) public view override returns (uint256) { return _allowances[owner][spender]; } function approve(address spender, uint256 amount) public override returns (bool) { _approve(_msgSender(), spender, amount); return true; } function transferFrom( address sender, address recipient, uint256 amount ) public override returns (bool) { _transfer(sender, recipient, amount); _approve( sender, _msgSender(), _allowances[sender][_msgSender()].sub( amount, "ERC20: transfer amount exceeds allowance" ) ); return true; } function tokenFromReflection(uint256 rAmount) private view returns (uint256) { require( rAmount <= _rTotal, "Amount must be less than total reflections" ); uint256 currentRate = _getRate(); return rAmount.div(currentRate); } function removeAllFee() private { if (_redisFee == 0 && _taxFee == 0) return; _previousredisFee = _redisFee; _previoustaxFee = _taxFee; _redisFee = 0; _taxFee = 0; } function restoreAllFee() private { _redisFee = _previousredisFee; _taxFee = _previoustaxFee; } function _approve( address owner, address spender, uint256 amount ) private { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } function _transfer( address from, address to, uint256 amount ) private { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); require(amount > 0, "Transfer amount must be greater than zero"); if (from != owner() && to != owner()) { //Trade start check if (!tradingOpen) { require(from == owner(), "TOKEN: This account cannot send tokens until trading is enabled"); } require(amount <= _maxTxAmount, "TOKEN: Max Transaction Limit"); require(!bots[from] && !bots[to], "TOKEN: Your account is blacklisted!"); if(to != uniswapV2Pair) { require(balanceOf(to) + amount < _maxWalletSize, "TOKEN: Balance exceeds wallet size!"); } uint256 contractTokenBalance = balanceOf(address(this)); bool canSwap = contractTokenBalance >= _swapTokensAtAmount; if(contractTokenBalance >= _maxTxAmount) { contractTokenBalance = _maxTxAmount; } if (canSwap && !inSwap && from != uniswapV2Pair && swapEnabled && !_isExcludedFromFee[from] && !_isExcludedFromFee[to]) { swapTokensForEth(contractTokenBalance); uint256 contractETHBalance = address(this).balance; if (contractETHBalance > 0) { sendETHToFee(address(this).balance); } } } bool takeFee = true; //Transfer Tokens if ((_isExcludedFromFee[from] || _isExcludedFromFee[to]) || (from != uniswapV2Pair && to != uniswapV2Pair)) { takeFee = false; } else { //Set Fee for Buys if(from == uniswapV2Pair && to != address(uniswapV2Router)) { _redisFee = _redisFeeOnBuy; _taxFee = _taxFeeOnBuy; } //Set Fee for Sells if (to == uniswapV2Pair && from != address(uniswapV2Router)) { _redisFee = _redisFeeOnSell; _taxFee = _taxFeeOnSell; } } _tokenTransfer(from, to, amount, takeFee); } function swapTokensForEth(uint256 tokenAmount) private lockTheSwap { address[] memory path = new address[](2); path[0] = address(this); path[1] = uniswapV2Router.WETH(); _approve(address(this), address(uniswapV2Router), tokenAmount); uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens( tokenAmount, 0, path, address(this), block.timestamp ); } function sendETHToFee(uint256 amount) private { _marketingAddress.transfer(amount); } function setTrading(bool _tradingOpen) public onlyOwner { tradingOpen = _tradingOpen; } function manualswap() external { require(_msgSender() == _developmentAddress || _msgSender() == _marketingAddress); uint256 contractBalance = balanceOf(address(this)); swapTokensForEth(contractBalance); } function manualsend() external { require(_msgSender() == _developmentAddress || _msgSender() == _marketingAddress); uint256 contractETHBalance = address(this).balance; sendETHToFee(contractETHBalance); } function blockBots(address[] memory bots_) public onlyOwner { for (uint256 i = 0; i < bots_.length; i++) { bots[bots_[i]] = true; } } function unblockBot(address notbot) public onlyOwner { bots[notbot] = false; } function _tokenTransfer( address sender, address recipient, uint256 amount, bool takeFee ) private { if (!takeFee) removeAllFee(); _transferStandard(sender, recipient, amount); if (!takeFee) restoreAllFee(); } function _transferStandard( address sender, address recipient, uint256 tAmount ) private { ( uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam ) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _takeTeam(tTeam); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function _takeTeam(uint256 tTeam) private { uint256 currentRate = _getRate(); uint256 rTeam = tTeam.mul(currentRate); _rOwned[address(this)] = _rOwned[address(this)].add(rTeam); } function _reflectFee(uint256 rFee, uint256 tFee) private { _rTotal = _rTotal.sub(rFee); _tFeeTotal = _tFeeTotal.add(tFee); } receive() external payable {} function _getValues(uint256 tAmount) private view returns ( uint256, uint256, uint256, uint256, uint256, uint256 ) { (uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getTValues(tAmount, _redisFee, _taxFee); uint256 currentRate = _getRate(); (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tTeam, currentRate); return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam); } function _getTValues( uint256 tAmount, uint256 redisFee, uint256 taxFee ) private pure returns ( uint256, uint256, uint256 ) { uint256 tFee = tAmount.mul(redisFee).div(100); uint256 tTeam = tAmount.mul(taxFee).div(100); uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam); return (tTransferAmount, tFee, tTeam); } function _getRValues( uint256 tAmount, uint256 tFee, uint256 tTeam, uint256 currentRate ) private pure returns ( uint256, uint256, uint256 ) { uint256 rAmount = tAmount.mul(currentRate); uint256 rFee = tFee.mul(currentRate); uint256 rTeam = tTeam.mul(currentRate); uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam); return (rAmount, rTransferAmount, rFee); } function _getRate() private view returns (uint256) { (uint256 rSupply, uint256 tSupply) = _getCurrentSupply(); return rSupply.div(tSupply); } function _getCurrentSupply() private view returns (uint256, uint256) { uint256 rSupply = _rTotal; uint256 tSupply = _tTotal; if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal); return (rSupply, tSupply); } function setFee(uint256 redisFeeOnBuy, uint256 redisFeeOnSell, uint256 taxFeeOnBuy, uint256 taxFeeOnSell) public onlyOwner { _redisFeeOnBuy = redisFeeOnBuy; _redisFeeOnSell = redisFeeOnSell; _taxFeeOnBuy = taxFeeOnBuy; _taxFeeOnSell = taxFeeOnSell; } //Set minimum tokens required to swap. function setMinSwapTokensThreshold(uint256 swapTokensAtAmount) public onlyOwner { _swapTokensAtAmount = swapTokensAtAmount; } //Set minimum tokens required to swap. function toggleSwap(bool _swapEnabled) public onlyOwner { swapEnabled = _swapEnabled; } //Set maximum transaction function setMaxTxnAmount(uint256 maxTxAmount) public onlyOwner { _maxTxAmount = maxTxAmount; } function setMaxWalletSize(uint256 maxWalletSize) public onlyOwner { _maxWalletSize = maxWalletSize; } function excludeMultipleAccountsFromFees(address[] calldata accounts, bool excluded) public onlyOwner { for(uint256 i = 0; i < accounts.length; i++) { _isExcludedFromFee[accounts[i]] = excluded; } } }
True
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pragma solidity ^0.4.24; interface HourglassInterface { function buy(address _playerAddress) payable external returns(uint256); function withdraw() external; function balanceOf(address _customerAddress) view external returns(uint256); } interface StrongHandsManagerInterface { function mint(address _owner, uint256 _amount) external; } contract StrongHandsManager { event CreateStrongHand(address indexed owner, address indexed strongHand); mapping (address => address) public strongHands; mapping (address => uint256) public ownerToBalance; //ERC20 event Transfer(address indexed from, address indexed to, uint256 tokens); string public constant name = "Stronghands3D"; string public constant symbol = "S3D"; uint8 public constant decimals = 18; uint256 internal tokenSupply = 0; function getStrong() public { require(strongHands[msg.sender] == address(0), "you already became a Stronghand"); strongHands[msg.sender] = new StrongHand(msg.sender); emit CreateStrongHand(msg.sender, strongHands[msg.sender]); } function mint(address _owner, uint256 _amount) external { require(strongHands[_owner] == msg.sender); tokenSupply+= _amount; ownerToBalance[_owner]+= _amount; emit Transfer(address(0), _owner, _amount); } //ERC20 function totalSupply() public view returns (uint256) { return tokenSupply; } function balanceOf(address _owner) public view returns (uint256) { return ownerToBalance[_owner]; } } contract StrongHand { HourglassInterface constant p3dContract = HourglassInterface(0xB3775fB83F7D12A36E0475aBdD1FCA35c091efBe); StrongHandsManagerInterface strongHandManager; address public owner; uint256 private p3dBalance = 0; modifier onlyOwner() { require(msg.sender == owner); _; } constructor(address _owner) public { owner = _owner; strongHandManager = StrongHandsManagerInterface(msg.sender); } function() public payable {} function buy(address _referrer) external payable onlyOwner { purchase(msg.value, _referrer); } function purchase(uint256 _amount, address _referrer) private { p3dContract.buy.value(_amount)(_referrer); uint256 balance = p3dContract.balanceOf(address(this)); uint256 diff = balance - p3dBalance; p3dBalance = balance; strongHandManager.mint(owner, diff); } function withdraw() external onlyOwner { p3dContract.withdraw(); owner.transfer(address(this).balance); } }
True
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/** *Submitted for verification at Etherscan.io on 2021-09-20 */ // SPDX-License-Identifier: NONE pragma solidity 0.7.6; // Part: IERC20Permit /** * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612]. * * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by * presenting a message signed by the account. By not relying on `{IERC20-approve}`, the token holder account doesn't * need to send a transaction, and thus is not required to hold Ether at all. */ interface IERC20Permit { /** * @dev Sets `value` as the allowance of `spender` over `owner`'s tokens, * given `owner`'s signed approval. * * IMPORTANT: The same issues {IERC20-approve} has related to transaction * ordering also apply here. * * Emits an {Approval} event. * * Requirements: * * - `spender` cannot be the zero address. * - `deadline` must be a timestamp in the future. * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner` * over the EIP712-formatted function arguments. * - the signature must use ``owner``'s current nonce (see {nonces}). * * For more information on the signature format, see the * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP * section]. */ function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; /** * @dev Returns the current nonce for `owner`. This value must be * included whenever a signature is generated for {permit}. * * Every successful call to {permit} increases ``owner``'s nonce by one. This * prevents a signature from being used multiple times. */ function nonces(address owner) external view returns (uint256); /** * @dev Returns the domain separator used in the encoding of the signature for `permit`, as defined by {EIP712}. */ // solhint-disable-next-line func-name-mixedcase function DOMAIN_SEPARATOR() external view returns (bytes32); } // Part: LixirErrors library LixirErrors { function require_INSUFFICIENT_BALANCE(bool cond) internal pure { require(cond, 'INSUFFICIENT_BALANCE'); } function require_INSUFFICIENT_ALLOWANCE(bool cond) internal pure { require(cond, 'INSUFFICIENT_ALLOWANCE'); } function require_PERMIT_EXPIRED(bool cond) internal pure { require(cond, 'PERMIT_EXPIRED'); } function require_INVALID_SIGNATURE(bool cond) internal pure { require(cond, 'INVALID_SIG'); } function require_XFER_ZERO_ADDRESS(bool cond) internal pure { require(cond, 'XFER_ZERO_ADDRESS'); } function require_INSUFFICIENT_INPUT_AMOUNT(bool cond) internal pure { require(cond, 'INSUFFICIENT_INPUT_AMOUNT'); } function require_INSUFFICIENT_OUTPUT_AMOUNT(bool cond) internal pure { require(cond, 'INSUFFICIENT_OUTPUT_AMOUNT'); } function require_INSUFFICIENT_ETH(bool cond) internal pure { require(cond, 'INSUFFICIENT_ETH'); } function require_MAX_SUPPLY(bool cond) internal pure { require(cond, 'MAX_SUPPLY'); } } // Part: LixirRoles library LixirRoles { bytes32 constant gov_role = keccak256('v1_gov_role'); bytes32 constant delegate_role = keccak256('v1_delegate_role'); bytes32 constant vault_role = keccak256('v1_vault_role'); bytes32 constant strategist_role = keccak256('v1_strategist_role'); bytes32 constant pauser_role = keccak256('v1_pauser_role'); bytes32 constant keeper_role = keccak256('v1_keeper_role'); bytes32 constant deployer_role = keccak256('v1_deployer_role'); bytes32 constant strategy_role = keccak256('v1_strategy_role'); bytes32 constant vault_implementation_role = keccak256('v1_vault_implementation_role'); bytes32 constant eth_vault_implementation_role = keccak256('v1_eth_vault_implementation_role'); bytes32 constant factory_role = keccak256('v1_factory_role'); bytes32 constant fee_setter_role = keccak256('fee_setter_role'); } // Part: OpenZeppelin/[email protected]/Address /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: value }(data); return _verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.staticcall(data); return _verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.delegatecall(data); return _verifyCallResult(success, returndata, errorMessage); } function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } // Part: OpenZeppelin/[email protected]/Context /* * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with GSN meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } // Part: OpenZeppelin/[email protected]/EnumerableSet /** * @dev Library for managing * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive * types. * * Sets have the following properties: * * - Elements are added, removed, and checked for existence in constant time * (O(1)). * - Elements are enumerated in O(n). No guarantees are made on the ordering. * * ``` * contract Example { * // Add the library methods * using EnumerableSet for EnumerableSet.AddressSet; * * // Declare a set state variable * EnumerableSet.AddressSet private mySet; * } * ``` * * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`) * and `uint256` (`UintSet`) are supported. */ library EnumerableSet { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping (bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; // When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement. bytes32 lastvalue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastvalue; // Update the index for the moved value set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { require(set._values.length > index, "EnumerableSet: index out of bounds"); return set._values[index]; } // Bytes32Set struct Bytes32Set { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _add(set._inner, value); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _remove(set._inner, value); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) { return _contains(set._inner, value); } /** * @dev Returns the number of values in the set. O(1). */ function length(Bytes32Set storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) { return _at(set._inner, index); } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint160(uint256(_at(set._inner, index)))); } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values on the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } } // Part: OpenZeppelin/[email protected]/IERC20 /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } // Part: OpenZeppelin/[email protected]/SafeMath /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when an * operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) { uint256 c = a + b; if (c < a) return (false, 0); return (true, c); } /** * @dev Returns the substraction of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) { if (b > a) return (false, 0); return (true, a - b); } /** * @dev Returns the multiplication of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) return (true, 0); uint256 c = a * b; if (c / a != b) return (false, 0); return (true, c); } /** * @dev Returns the division of two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) { if (b == 0) return (false, 0); return (true, a / b); } /** * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) { if (b == 0) return (false, 0); return (true, a % b); } /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { require(b <= a, "SafeMath: subtraction overflow"); return a - b; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) return 0; uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers, reverting on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { require(b > 0, "SafeMath: division by zero"); return a / b; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { require(b > 0, "SafeMath: modulo by zero"); return a % b; } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {trySub}. * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); return a - b; } /** * @dev Returns the integer division of two unsigned integers, reverting with custom message on * division by zero. The result is rounded towards zero. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryDiv}. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); return a / b; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting with custom message when dividing by zero. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryMod}. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); return a % b; } } // Part: SafeCast /// @title Safe casting methods /// @notice Contains methods for safely casting between types library SafeCast { /// @notice Cast a uint256 to a uint160, revert on overflow /// @param y The uint256 to be downcasted /// @return z The downcasted integer, now type uint160 function toUint160(uint256 y) internal pure returns (uint160 z) { require((z = uint160(y)) == y); } /// @notice Cast a int256 to a int128, revert on overflow or underflow /// @param y The int256 to be downcasted /// @return z The downcasted integer, now type int128 function toInt128(int256 y) internal pure returns (int128 z) { require((z = int128(y)) == y); } /// @notice Cast a uint256 to a int256, revert on overflow /// @param y The uint256 to be casted /// @return z The casted integer, now type int256 function toInt256(uint256 y) internal pure returns (int256 z) { require(y < 2**255); z = int256(y); } function toUint128(uint256 y) internal pure returns (uint128 z) { require((z = uint128(y)) == y); } function abs(int256 y) internal pure returns (uint256 z) { z = y < 0 ? uint256(-y) : uint256(y); } } // Part: Uniswap/[email protected]/FixedPoint128 /// @title FixedPoint128 /// @notice A library for handling binary fixed point numbers, see https://en.wikipedia.org/wiki/Q_(number_format) library FixedPoint128 { uint256 internal constant Q128 = 0x100000000000000000000000000000000; } // Part: Uniswap/[email protected]/FixedPoint96 /// @title FixedPoint96 /// @notice A library for handling binary fixed point numbers, see https://en.wikipedia.org/wiki/Q_(number_format) /// @dev Used in SqrtPriceMath.sol library FixedPoint96 { uint8 internal constant RESOLUTION = 96; uint256 internal constant Q96 = 0x1000000000000000000000000; } // Part: Uniswap/[email protected]/FullMath /// @title Contains 512-bit math functions /// @notice Facilitates multiplication and division that can have overflow of an intermediate value without any loss of precision /// @dev Handles "phantom overflow" i.e., allows multiplication and division where an intermediate value overflows 256 bits library FullMath { /// @notice Calculates floor(a×b÷denominator) with full precision. Throws if result overflows a uint256 or denominator == 0 /// @param a The multiplicand /// @param b The multiplier /// @param denominator The divisor /// @return result The 256-bit result /// @dev Credit to Remco Bloemen under MIT license https://xn--2-umb.com/21/muldiv function mulDiv( uint256 a, uint256 b, uint256 denominator ) internal pure returns (uint256 result) { // 512-bit multiply [prod1 prod0] = a * b // Compute the product mod 2**256 and mod 2**256 - 1 // then use the Chinese Remainder Theorem to reconstruct // the 512 bit result. The result is stored in two 256 // variables such that product = prod1 * 2**256 + prod0 uint256 prod0; // Least significant 256 bits of the product uint256 prod1; // Most significant 256 bits of the product assembly { let mm := mulmod(a, b, not(0)) prod0 := mul(a, b) prod1 := sub(sub(mm, prod0), lt(mm, prod0)) } // Handle non-overflow cases, 256 by 256 division if (prod1 == 0) { require(denominator > 0); assembly { result := div(prod0, denominator) } return result; } // Make sure the result is less than 2**256. // Also prevents denominator == 0 require(denominator > prod1); /////////////////////////////////////////////// // 512 by 256 division. /////////////////////////////////////////////// // Make division exact by subtracting the remainder from [prod1 prod0] // Compute remainder using mulmod uint256 remainder; assembly { remainder := mulmod(a, b, denominator) } // Subtract 256 bit number from 512 bit number assembly { prod1 := sub(prod1, gt(remainder, prod0)) prod0 := sub(prod0, remainder) } // Factor powers of two out of denominator // Compute largest power of two divisor of denominator. // Always >= 1. uint256 twos = -denominator & denominator; // Divide denominator by power of two assembly { denominator := div(denominator, twos) } // Divide [prod1 prod0] by the factors of two assembly { prod0 := div(prod0, twos) } // Shift in bits from prod1 into prod0. For this we need // to flip `twos` such that it is 2**256 / twos. // If twos is zero, then it becomes one assembly { twos := add(div(sub(0, twos), twos), 1) } prod0 |= prod1 * twos; // Invert denominator mod 2**256 // Now that denominator is an odd number, it has an inverse // modulo 2**256 such that denominator * inv = 1 mod 2**256. // Compute the inverse by starting with a seed that is correct // correct for four bits. That is, denominator * inv = 1 mod 2**4 uint256 inv = (3 * denominator) ^ 2; // Now use Newton-Raphson iteration to improve the precision. // Thanks to Hensel's lifting lemma, this also works in modular // arithmetic, doubling the correct bits in each step. inv *= 2 - denominator * inv; // inverse mod 2**8 inv *= 2 - denominator * inv; // inverse mod 2**16 inv *= 2 - denominator * inv; // inverse mod 2**32 inv *= 2 - denominator * inv; // inverse mod 2**64 inv *= 2 - denominator * inv; // inverse mod 2**128 inv *= 2 - denominator * inv; // inverse mod 2**256 // Because the division is now exact we can divide by multiplying // with the modular inverse of denominator. This will give us the // correct result modulo 2**256. Since the precoditions guarantee // that the outcome is less than 2**256, this is the final result. // We don't need to compute the high bits of the result and prod1 // is no longer required. result = prod0 * inv; return result; } /// @notice Calculates ceil(a×b÷denominator) with full precision. Throws if result overflows a uint256 or denominator == 0 /// @param a The multiplicand /// @param b The multiplier /// @param denominator The divisor /// @return result The 256-bit result function mulDivRoundingUp( uint256 a, uint256 b, uint256 denominator ) internal pure returns (uint256 result) { result = mulDiv(a, b, denominator); if (mulmod(a, b, denominator) > 0) { require(result < type(uint256).max); result++; } } } // Part: Uniswap/[email protected]/IUniswapV3MintCallback /// @title Callback for IUniswapV3PoolActions#mint /// @notice Any contract that calls IUniswapV3PoolActions#mint must implement this interface interface IUniswapV3MintCallback { /// @notice Called to `msg.sender` after minting liquidity to a position from IUniswapV3Pool#mint. /// @dev In the implementation you must pay the pool tokens owed for the minted liquidity. /// The caller of this method must be checked to be a UniswapV3Pool deployed by the canonical UniswapV3Factory. /// @param amount0Owed The amount of token0 due to the pool for the minted liquidity /// @param amount1Owed The amount of token1 due to the pool for the minted liquidity /// @param data Any data passed through by the caller via the IUniswapV3PoolActions#mint call function uniswapV3MintCallback( uint256 amount0Owed, uint256 amount1Owed, bytes calldata data ) external; } // Part: Uniswap/[email protected]/IUniswapV3PoolActions /// @title Permissionless pool actions /// @notice Contains pool methods that can be called by anyone interface IUniswapV3PoolActions { /// @notice Sets the initial price for the pool /// @dev Price is represented as a sqrt(amountToken1/amountToken0) Q64.96 value /// @param sqrtPriceX96 the initial sqrt price of the pool as a Q64.96 function initialize(uint160 sqrtPriceX96) external; /// @notice Adds liquidity for the given recipient/tickLower/tickUpper position /// @dev The caller of this method receives a callback in the form of IUniswapV3MintCallback#uniswapV3MintCallback /// in which they must pay any token0 or token1 owed for the liquidity. The amount of token0/token1 due depends /// on tickLower, tickUpper, the amount of liquidity, and the current price. /// @param recipient The address for which the liquidity will be created /// @param tickLower The lower tick of the position in which to add liquidity /// @param tickUpper The upper tick of the position in which to add liquidity /// @param amount The amount of liquidity to mint /// @param data Any data that should be passed through to the callback /// @return amount0 The amount of token0 that was paid to mint the given amount of liquidity. Matches the value in the callback /// @return amount1 The amount of token1 that was paid to mint the given amount of liquidity. Matches the value in the callback function mint( address recipient, int24 tickLower, int24 tickUpper, uint128 amount, bytes calldata data ) external returns (uint256 amount0, uint256 amount1); /// @notice Collects tokens owed to a position /// @dev Does not recompute fees earned, which must be done either via mint or burn of any amount of liquidity. /// Collect must be called by the position owner. To withdraw only token0 or only token1, amount0Requested or /// amount1Requested may be set to zero. To withdraw all tokens owed, caller may pass any value greater than the /// actual tokens owed, e.g. type(uint128).max. Tokens owed may be from accumulated swap fees or burned liquidity. /// @param recipient The address which should receive the fees collected /// @param tickLower The lower tick of the position for which to collect fees /// @param tickUpper The upper tick of the position for which to collect fees /// @param amount0Requested How much token0 should be withdrawn from the fees owed /// @param amount1Requested How much token1 should be withdrawn from the fees owed /// @return amount0 The amount of fees collected in token0 /// @return amount1 The amount of fees collected in token1 function collect( address recipient, int24 tickLower, int24 tickUpper, uint128 amount0Requested, uint128 amount1Requested ) external returns (uint128 amount0, uint128 amount1); /// @notice Burn liquidity from the sender and account tokens owed for the liquidity to the position /// @dev Can be used to trigger a recalculation of fees owed to a position by calling with an amount of 0 /// @dev Fees must be collected separately via a call to #collect /// @param tickLower The lower tick of the position for which to burn liquidity /// @param tickUpper The upper tick of the position for which to burn liquidity /// @param amount How much liquidity to burn /// @return amount0 The amount of token0 sent to the recipient /// @return amount1 The amount of token1 sent to the recipient function burn( int24 tickLower, int24 tickUpper, uint128 amount ) external returns (uint256 amount0, uint256 amount1); /// @notice Swap token0 for token1, or token1 for token0 /// @dev The caller of this method receives a callback in the form of IUniswapV3SwapCallback#uniswapV3SwapCallback /// @param recipient The address to receive the output of the swap /// @param zeroForOne The direction of the swap, true for token0 to token1, false for token1 to token0 /// @param amountSpecified The amount of the swap, which implicitly configures the swap as exact input (positive), or exact output (negative) /// @param sqrtPriceLimitX96 The Q64.96 sqrt price limit. If zero for one, the price cannot be less than this /// value after the swap. If one for zero, the price cannot be greater than this value after the swap /// @param data Any data to be passed through to the callback /// @return amount0 The delta of the balance of token0 of the pool, exact when negative, minimum when positive /// @return amount1 The delta of the balance of token1 of the pool, exact when negative, minimum when positive function swap( address recipient, bool zeroForOne, int256 amountSpecified, uint160 sqrtPriceLimitX96, bytes calldata data ) external returns (int256 amount0, int256 amount1); /// @notice Receive token0 and/or token1 and pay it back, plus a fee, in the callback /// @dev The caller of this method receives a callback in the form of IUniswapV3FlashCallback#uniswapV3FlashCallback /// @dev Can be used to donate underlying tokens pro-rata to currently in-range liquidity providers by calling /// with 0 amount{0,1} and sending the donation amount(s) from the callback /// @param recipient The address which will receive the token0 and token1 amounts /// @param amount0 The amount of token0 to send /// @param amount1 The amount of token1 to send /// @param data Any data to be passed through to the callback function flash( address recipient, uint256 amount0, uint256 amount1, bytes calldata data ) external; /// @notice Increase the maximum number of price and liquidity observations that this pool will store /// @dev This method is no-op if the pool already has an observationCardinalityNext greater than or equal to /// the input observationCardinalityNext. /// @param observationCardinalityNext The desired minimum number of observations for the pool to store function increaseObservationCardinalityNext(uint16 observationCardinalityNext) external; } // Part: Uniswap/[email protected]/IUniswapV3PoolDerivedState /// @title Pool state that is not stored /// @notice Contains view functions to provide information about the pool that is computed rather than stored on the /// blockchain. The functions here may have variable gas costs. interface IUniswapV3PoolDerivedState { /// @notice Returns the cumulative tick and liquidity as of each timestamp `secondsAgo` from the current block timestamp /// @dev To get a time weighted average tick or liquidity-in-range, you must call this with two values, one representing /// the beginning of the period and another for the end of the period. E.g., to get the last hour time-weighted average tick, /// you must call it with secondsAgos = [3600, 0]. /// @dev The time weighted average tick represents the geometric time weighted average price of the pool, in /// log base sqrt(1.0001) of token1 / token0. The TickMath library can be used to go from a tick value to a ratio. /// @param secondsAgos From how long ago each cumulative tick and liquidity value should be returned /// @return tickCumulatives Cumulative tick values as of each `secondsAgos` from the current block timestamp /// @return secondsPerLiquidityCumulativeX128s Cumulative seconds per liquidity-in-range value as of each `secondsAgos` from the current block /// timestamp function observe(uint32[] calldata secondsAgos) external view returns (int56[] memory tickCumulatives, uint160[] memory secondsPerLiquidityCumulativeX128s); /// @notice Returns a snapshot of the tick cumulative, seconds per liquidity and seconds inside a tick range /// @dev Snapshots must only be compared to other snapshots, taken over a period for which a position existed. /// I.e., snapshots cannot be compared if a position is not held for the entire period between when the first /// snapshot is taken and the second snapshot is taken. /// @param tickLower The lower tick of the range /// @param tickUpper The upper tick of the range /// @return tickCumulativeInside The snapshot of the tick accumulator for the range /// @return secondsPerLiquidityInsideX128 The snapshot of seconds per liquidity for the range /// @return secondsInside The snapshot of seconds per liquidity for the range function snapshotCumulativesInside(int24 tickLower, int24 tickUpper) external view returns ( int56 tickCumulativeInside, uint160 secondsPerLiquidityInsideX128, uint32 secondsInside ); } // Part: Uniswap/[email protected]/IUniswapV3PoolEvents /// @title Events emitted by a pool /// @notice Contains all events emitted by the pool interface IUniswapV3PoolEvents { /// @notice Emitted exactly once by a pool when #initialize is first called on the pool /// @dev Mint/Burn/Swap cannot be emitted by the pool before Initialize /// @param sqrtPriceX96 The initial sqrt price of the pool, as a Q64.96 /// @param tick The initial tick of the pool, i.e. log base 1.0001 of the starting price of the pool event Initialize(uint160 sqrtPriceX96, int24 tick); /// @notice Emitted when liquidity is minted for a given position /// @param sender The address that minted the liquidity /// @param owner The owner of the position and recipient of any minted liquidity /// @param tickLower The lower tick of the position /// @param tickUpper The upper tick of the position /// @param amount The amount of liquidity minted to the position range /// @param amount0 How much token0 was required for the minted liquidity /// @param amount1 How much token1 was required for the minted liquidity event Mint( address sender, address indexed owner, int24 indexed tickLower, int24 indexed tickUpper, uint128 amount, uint256 amount0, uint256 amount1 ); /// @notice Emitted when fees are collected by the owner of a position /// @dev Collect events may be emitted with zero amount0 and amount1 when the caller chooses not to collect fees /// @param owner The owner of the position for which fees are collected /// @param tickLower The lower tick of the position /// @param tickUpper The upper tick of the position /// @param amount0 The amount of token0 fees collected /// @param amount1 The amount of token1 fees collected event Collect( address indexed owner, address recipient, int24 indexed tickLower, int24 indexed tickUpper, uint128 amount0, uint128 amount1 ); /// @notice Emitted when a position's liquidity is removed /// @dev Does not withdraw any fees earned by the liquidity position, which must be withdrawn via #collect /// @param owner The owner of the position for which liquidity is removed /// @param tickLower The lower tick of the position /// @param tickUpper The upper tick of the position /// @param amount The amount of liquidity to remove /// @param amount0 The amount of token0 withdrawn /// @param amount1 The amount of token1 withdrawn event Burn( address indexed owner, int24 indexed tickLower, int24 indexed tickUpper, uint128 amount, uint256 amount0, uint256 amount1 ); /// @notice Emitted by the pool for any swaps between token0 and token1 /// @param sender The address that initiated the swap call, and that received the callback /// @param recipient The address that received the output of the swap /// @param amount0 The delta of the token0 balance of the pool /// @param amount1 The delta of the token1 balance of the pool /// @param sqrtPriceX96 The sqrt(price) of the pool after the swap, as a Q64.96 /// @param liquidity The liquidity of the pool after the swap /// @param tick The log base 1.0001 of price of the pool after the swap event Swap( address indexed sender, address indexed recipient, int256 amount0, int256 amount1, uint160 sqrtPriceX96, uint128 liquidity, int24 tick ); /// @notice Emitted by the pool for any flashes of token0/token1 /// @param sender The address that initiated the swap call, and that received the callback /// @param recipient The address that received the tokens from flash /// @param amount0 The amount of token0 that was flashed /// @param amount1 The amount of token1 that was flashed /// @param paid0 The amount of token0 paid for the flash, which can exceed the amount0 plus the fee /// @param paid1 The amount of token1 paid for the flash, which can exceed the amount1 plus the fee event Flash( address indexed sender, address indexed recipient, uint256 amount0, uint256 amount1, uint256 paid0, uint256 paid1 ); /// @notice Emitted by the pool for increases to the number of observations that can be stored /// @dev observationCardinalityNext is not the observation cardinality until an observation is written at the index /// just before a mint/swap/burn. /// @param observationCardinalityNextOld The previous value of the next observation cardinality /// @param observationCardinalityNextNew The updated value of the next observation cardinality event IncreaseObservationCardinalityNext( uint16 observationCardinalityNextOld, uint16 observationCardinalityNextNew ); /// @notice Emitted when the protocol fee is changed by the pool /// @param feeProtocol0Old The previous value of the token0 protocol fee /// @param feeProtocol1Old The previous value of the token1 protocol fee /// @param feeProtocol0New The updated value of the token0 protocol fee /// @param feeProtocol1New The updated value of the token1 protocol fee event SetFeeProtocol(uint8 feeProtocol0Old, uint8 feeProtocol1Old, uint8 feeProtocol0New, uint8 feeProtocol1New); /// @notice Emitted when the collected protocol fees are withdrawn by the factory owner /// @param sender The address that collects the protocol fees /// @param recipient The address that receives the collected protocol fees /// @param amount0 The amount of token0 protocol fees that is withdrawn /// @param amount0 The amount of token1 protocol fees that is withdrawn event CollectProtocol(address indexed sender, address indexed recipient, uint128 amount0, uint128 amount1); } // Part: Uniswap/[email protected]/IUniswapV3PoolImmutables /// @title Pool state that never changes /// @notice These parameters are fixed for a pool forever, i.e., the methods will always return the same values interface IUniswapV3PoolImmutables { /// @notice The contract that deployed the pool, which must adhere to the IUniswapV3Factory interface /// @return The contract address function factory() external view returns (address); /// @notice The first of the two tokens of the pool, sorted by address /// @return The token contract address function token0() external view returns (address); /// @notice The second of the two tokens of the pool, sorted by address /// @return The token contract address function token1() external view returns (address); /// @notice The pool's fee in hundredths of a bip, i.e. 1e-6 /// @return The fee function fee() external view returns (uint24); /// @notice The pool tick spacing /// @dev Ticks can only be used at multiples of this value, minimum of 1 and always positive /// e.g.: a tickSpacing of 3 means ticks can be initialized every 3rd tick, i.e., ..., -6, -3, 0, 3, 6, ... /// This value is an int24 to avoid casting even though it is always positive. /// @return The tick spacing function tickSpacing() external view returns (int24); /// @notice The maximum amount of position liquidity that can use any tick in the range /// @dev This parameter is enforced per tick to prevent liquidity from overflowing a uint128 at any point, and /// also prevents out-of-range liquidity from being used to prevent adding in-range liquidity to a pool /// @return The max amount of liquidity per tick function maxLiquidityPerTick() external view returns (uint128); } // Part: Uniswap/[email protected]/IUniswapV3PoolOwnerActions /// @title Permissioned pool actions /// @notice Contains pool methods that may only be called by the factory owner interface IUniswapV3PoolOwnerActions { /// @notice Set the denominator of the protocol's % share of the fees /// @param feeProtocol0 new protocol fee for token0 of the pool /// @param feeProtocol1 new protocol fee for token1 of the pool function setFeeProtocol(uint8 feeProtocol0, uint8 feeProtocol1) external; /// @notice Collect the protocol fee accrued to the pool /// @param recipient The address to which collected protocol fees should be sent /// @param amount0Requested The maximum amount of token0 to send, can be 0 to collect fees in only token1 /// @param amount1Requested The maximum amount of token1 to send, can be 0 to collect fees in only token0 /// @return amount0 The protocol fee collected in token0 /// @return amount1 The protocol fee collected in token1 function collectProtocol( address recipient, uint128 amount0Requested, uint128 amount1Requested ) external returns (uint128 amount0, uint128 amount1); } // Part: Uniswap/[email protected]/IUniswapV3PoolState /// @title Pool state that can change /// @notice These methods compose the pool's state, and can change with any frequency including multiple times /// per transaction interface IUniswapV3PoolState { /// @notice The 0th storage slot in the pool stores many values, and is exposed as a single method to save gas /// when accessed externally. /// @return sqrtPriceX96 The current price of the pool as a sqrt(token1/token0) Q64.96 value /// tick The current tick of the pool, i.e. according to the last tick transition that was run. /// This value may not always be equal to SqrtTickMath.getTickAtSqrtRatio(sqrtPriceX96) if the price is on a tick /// boundary. /// observationIndex The index of the last oracle observation that was written, /// observationCardinality The current maximum number of observations stored in the pool, /// observationCardinalityNext The next maximum number of observations, to be updated when the observation. /// feeProtocol The protocol fee for both tokens of the pool. /// Encoded as two 4 bit values, where the protocol fee of token1 is shifted 4 bits and the protocol fee of token0 /// is the lower 4 bits. Used as the denominator of a fraction of the swap fee, e.g. 4 means 1/4th of the swap fee. /// unlocked Whether the pool is currently locked to reentrancy function slot0() external view returns ( uint160 sqrtPriceX96, int24 tick, uint16 observationIndex, uint16 observationCardinality, uint16 observationCardinalityNext, uint8 feeProtocol, bool unlocked ); /// @notice The fee growth as a Q128.128 fees of token0 collected per unit of liquidity for the entire life of the pool /// @dev This value can overflow the uint256 function feeGrowthGlobal0X128() external view returns (uint256); /// @notice The fee growth as a Q128.128 fees of token1 collected per unit of liquidity for the entire life of the pool /// @dev This value can overflow the uint256 function feeGrowthGlobal1X128() external view returns (uint256); /// @notice The amounts of token0 and token1 that are owed to the protocol /// @dev Protocol fees will never exceed uint128 max in either token function protocolFees() external view returns (uint128 token0, uint128 token1); /// @notice The currently in range liquidity available to the pool /// @dev This value has no relationship to the total liquidity across all ticks function liquidity() external view returns (uint128); /// @notice Look up information about a specific tick in the pool /// @param tick The tick to look up /// @return liquidityGross the total amount of position liquidity that uses the pool either as tick lower or /// tick upper, /// liquidityNet how much liquidity changes when the pool price crosses the tick, /// feeGrowthOutside0X128 the fee growth on the other side of the tick from the current tick in token0, /// feeGrowthOutside1X128 the fee growth on the other side of the tick from the current tick in token1, /// tickCumulativeOutside the cumulative tick value on the other side of the tick from the current tick /// secondsPerLiquidityOutsideX128 the seconds spent per liquidity on the other side of the tick from the current tick, /// secondsOutside the seconds spent on the other side of the tick from the current tick, /// initialized Set to true if the tick is initialized, i.e. liquidityGross is greater than 0, otherwise equal to false. /// Outside values can only be used if the tick is initialized, i.e. if liquidityGross is greater than 0. /// In addition, these values are only relative and must be used only in comparison to previous snapshots for /// a specific position. function ticks(int24 tick) external view returns ( uint128 liquidityGross, int128 liquidityNet, uint256 feeGrowthOutside0X128, uint256 feeGrowthOutside1X128, int56 tickCumulativeOutside, uint160 secondsPerLiquidityOutsideX128, uint32 secondsOutside, bool initialized ); /// @notice Returns 256 packed tick initialized boolean values. See TickBitmap for more information function tickBitmap(int16 wordPosition) external view returns (uint256); /// @notice Returns the information about a position by the position's key /// @param key The position's key is a hash of a preimage composed by the owner, tickLower and tickUpper /// @return _liquidity The amount of liquidity in the position, /// Returns feeGrowthInside0LastX128 fee growth of token0 inside the tick range as of the last mint/burn/poke, /// Returns feeGrowthInside1LastX128 fee growth of token1 inside the tick range as of the last mint/burn/poke, /// Returns tokensOwed0 the computed amount of token0 owed to the position as of the last mint/burn/poke, /// Returns tokensOwed1 the computed amount of token1 owed to the position as of the last mint/burn/poke function positions(bytes32 key) external view returns ( uint128 _liquidity, uint256 feeGrowthInside0LastX128, uint256 feeGrowthInside1LastX128, uint128 tokensOwed0, uint128 tokensOwed1 ); /// @notice Returns data about a specific observation index /// @param index The element of the observations array to fetch /// @dev You most likely want to use #observe() instead of this method to get an observation as of some amount of time /// ago, rather than at a specific index in the array. /// @return blockTimestamp The timestamp of the observation, /// Returns tickCumulative the tick multiplied by seconds elapsed for the life of the pool as of the observation timestamp, /// Returns secondsPerLiquidityCumulativeX128 the seconds per in range liquidity for the life of the pool as of the observation timestamp, /// Returns initialized whether the observation has been initialized and the values are safe to use function observations(uint256 index) external view returns ( uint32 blockTimestamp, int56 tickCumulative, uint160 secondsPerLiquidityCumulativeX128, bool initialized ); } // Part: Uniswap/[email protected]/LowGasSafeMath /// @title Optimized overflow and underflow safe math operations /// @notice Contains methods for doing math operations that revert on overflow or underflow for minimal gas cost library LowGasSafeMath { /// @notice Returns x + y, reverts if sum overflows uint256 /// @param x The augend /// @param y The addend /// @return z The sum of x and y function add(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x + y) >= x); } /// @notice Returns x - y, reverts if underflows /// @param x The minuend /// @param y The subtrahend /// @return z The difference of x and y function sub(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x - y) <= x); } /// @notice Returns x * y, reverts if overflows /// @param x The multiplicand /// @param y The multiplier /// @return z The product of x and y function mul(uint256 x, uint256 y) internal pure returns (uint256 z) { require(x == 0 || (z = x * y) / x == y); } /// @notice Returns x + y, reverts if overflows or underflows /// @param x The augend /// @param y The addend /// @return z The sum of x and y function add(int256 x, int256 y) internal pure returns (int256 z) { require((z = x + y) >= x == (y >= 0)); } /// @notice Returns x - y, reverts if overflows or underflows /// @param x The minuend /// @param y The subtrahend /// @return z The difference of x and y function sub(int256 x, int256 y) internal pure returns (int256 z) { require((z = x - y) <= x == (y >= 0)); } } // Part: Uniswap/[email protected]/TickMath /// @title Math library for computing sqrt prices from ticks and vice versa /// @notice Computes sqrt price for ticks of size 1.0001, i.e. sqrt(1.0001^tick) as fixed point Q64.96 numbers. Supports /// prices between 2**-128 and 2**128 library TickMath { /// @dev The minimum tick that may be passed to #getSqrtRatioAtTick computed from log base 1.0001 of 2**-128 int24 internal constant MIN_TICK = -887272; /// @dev The maximum tick that may be passed to #getSqrtRatioAtTick computed from log base 1.0001 of 2**128 int24 internal constant MAX_TICK = -MIN_TICK; /// @dev The minimum value that can be returned from #getSqrtRatioAtTick. Equivalent to getSqrtRatioAtTick(MIN_TICK) uint160 internal constant MIN_SQRT_RATIO = 4295128739; /// @dev The maximum value that can be returned from #getSqrtRatioAtTick. Equivalent to getSqrtRatioAtTick(MAX_TICK) uint160 internal constant MAX_SQRT_RATIO = 1461446703485210103287273052203988822378723970342; /// @notice Calculates sqrt(1.0001^tick) * 2^96 /// @dev Throws if |tick| > max tick /// @param tick The input tick for the above formula /// @return sqrtPriceX96 A Fixed point Q64.96 number representing the sqrt of the ratio of the two assets (token1/token0) /// at the given tick function getSqrtRatioAtTick(int24 tick) internal pure returns (uint160 sqrtPriceX96) { uint256 absTick = tick < 0 ? uint256(-int256(tick)) : uint256(int256(tick)); require(absTick <= uint256(MAX_TICK), 'T'); uint256 ratio = absTick & 0x1 != 0 ? 0xfffcb933bd6fad37aa2d162d1a594001 : 0x100000000000000000000000000000000; if (absTick & 0x2 != 0) ratio = (ratio * 0xfff97272373d413259a46990580e213a) >> 128; if (absTick & 0x4 != 0) ratio = (ratio * 0xfff2e50f5f656932ef12357cf3c7fdcc) >> 128; if (absTick & 0x8 != 0) ratio = (ratio * 0xffe5caca7e10e4e61c3624eaa0941cd0) >> 128; if (absTick & 0x10 != 0) ratio = (ratio * 0xffcb9843d60f6159c9db58835c926644) >> 128; if (absTick & 0x20 != 0) ratio = (ratio * 0xff973b41fa98c081472e6896dfb254c0) >> 128; if (absTick & 0x40 != 0) ratio = (ratio * 0xff2ea16466c96a3843ec78b326b52861) >> 128; if (absTick & 0x80 != 0) ratio = (ratio * 0xfe5dee046a99a2a811c461f1969c3053) >> 128; if (absTick & 0x100 != 0) ratio = (ratio * 0xfcbe86c7900a88aedcffc83b479aa3a4) >> 128; if (absTick & 0x200 != 0) ratio = (ratio * 0xf987a7253ac413176f2b074cf7815e54) >> 128; if (absTick & 0x400 != 0) ratio = (ratio * 0xf3392b0822b70005940c7a398e4b70f3) >> 128; if (absTick & 0x800 != 0) ratio = (ratio * 0xe7159475a2c29b7443b29c7fa6e889d9) >> 128; if (absTick & 0x1000 != 0) ratio = (ratio * 0xd097f3bdfd2022b8845ad8f792aa5825) >> 128; if (absTick & 0x2000 != 0) ratio = (ratio * 0xa9f746462d870fdf8a65dc1f90e061e5) >> 128; if (absTick & 0x4000 != 0) ratio = (ratio * 0x70d869a156d2a1b890bb3df62baf32f7) >> 128; if (absTick & 0x8000 != 0) ratio = (ratio * 0x31be135f97d08fd981231505542fcfa6) >> 128; if (absTick & 0x10000 != 0) ratio = (ratio * 0x9aa508b5b7a84e1c677de54f3e99bc9) >> 128; if (absTick & 0x20000 != 0) ratio = (ratio * 0x5d6af8dedb81196699c329225ee604) >> 128; if (absTick & 0x40000 != 0) ratio = (ratio * 0x2216e584f5fa1ea926041bedfe98) >> 128; if (absTick & 0x80000 != 0) ratio = (ratio * 0x48a170391f7dc42444e8fa2) >> 128; if (tick > 0) ratio = type(uint256).max / ratio; // this divides by 1<<32 rounding up to go from a Q128.128 to a Q128.96. // we then downcast because we know the result always fits within 160 bits due to our tick input constraint // we round up in the division so getTickAtSqrtRatio of the output price is always consistent sqrtPriceX96 = uint160((ratio >> 32) + (ratio % (1 << 32) == 0 ? 0 : 1)); } /// @notice Calculates the greatest tick value such that getRatioAtTick(tick) <= ratio /// @dev Throws in case sqrtPriceX96 < MIN_SQRT_RATIO, as MIN_SQRT_RATIO is the lowest value getRatioAtTick may /// ever return. /// @param sqrtPriceX96 The sqrt ratio for which to compute the tick as a Q64.96 /// @return tick The greatest tick for which the ratio is less than or equal to the input ratio function getTickAtSqrtRatio(uint160 sqrtPriceX96) internal pure returns (int24 tick) { // second inequality must be < because the price can never reach the price at the max tick require(sqrtPriceX96 >= MIN_SQRT_RATIO && sqrtPriceX96 < MAX_SQRT_RATIO, 'R'); uint256 ratio = uint256(sqrtPriceX96) << 32; uint256 r = ratio; uint256 msb = 0; assembly { let f := shl(7, gt(r, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF)) msb := or(msb, f) r := shr(f, r) } assembly { let f := shl(6, gt(r, 0xFFFFFFFFFFFFFFFF)) msb := or(msb, f) r := shr(f, r) } assembly { let f := shl(5, gt(r, 0xFFFFFFFF)) msb := or(msb, f) r := shr(f, r) } assembly { let f := shl(4, gt(r, 0xFFFF)) msb := or(msb, f) r := shr(f, r) } assembly { let f := shl(3, gt(r, 0xFF)) msb := or(msb, f) r := shr(f, r) } assembly { let f := shl(2, gt(r, 0xF)) msb := or(msb, f) r := shr(f, r) } assembly { let f := shl(1, gt(r, 0x3)) msb := or(msb, f) r := shr(f, r) } assembly { let f := gt(r, 0x1) msb := or(msb, f) } if (msb >= 128) r = ratio >> (msb - 127); else r = ratio << (127 - msb); int256 log_2 = (int256(msb) - 128) << 64; assembly { r := shr(127, mul(r, r)) let f := shr(128, r) log_2 := or(log_2, shl(63, f)) r := shr(f, r) } assembly { r := shr(127, mul(r, r)) let f := shr(128, r) log_2 := or(log_2, shl(62, f)) r := shr(f, r) } assembly { r := shr(127, mul(r, r)) let f := shr(128, r) log_2 := or(log_2, shl(61, f)) r := shr(f, r) } assembly { r := shr(127, mul(r, r)) let f := shr(128, r) log_2 := or(log_2, shl(60, f)) r := shr(f, r) } assembly { r := shr(127, mul(r, r)) let f := shr(128, r) log_2 := or(log_2, shl(59, f)) r := shr(f, r) } assembly { r := shr(127, mul(r, r)) let f := shr(128, r) log_2 := or(log_2, shl(58, f)) r := shr(f, r) } assembly { r := shr(127, mul(r, r)) let f := shr(128, r) log_2 := or(log_2, shl(57, f)) r := shr(f, r) } assembly { r := shr(127, mul(r, r)) let f := shr(128, r) log_2 := or(log_2, shl(56, f)) r := shr(f, r) } assembly { r := shr(127, mul(r, r)) let f := shr(128, r) log_2 := or(log_2, shl(55, f)) r := shr(f, r) } assembly { r := shr(127, mul(r, r)) let f := shr(128, r) log_2 := or(log_2, shl(54, f)) r := shr(f, r) } assembly { r := shr(127, mul(r, r)) let f := shr(128, r) log_2 := or(log_2, shl(53, f)) r := shr(f, r) } assembly { r := shr(127, mul(r, r)) let f := shr(128, r) log_2 := or(log_2, shl(52, f)) r := shr(f, r) } assembly { r := shr(127, mul(r, r)) let f := shr(128, r) log_2 := or(log_2, shl(51, f)) r := shr(f, r) } assembly { r := shr(127, mul(r, r)) let f := shr(128, r) log_2 := or(log_2, shl(50, f)) } int256 log_sqrt10001 = log_2 * 255738958999603826347141; // 128.128 number int24 tickLow = int24((log_sqrt10001 - 3402992956809132418596140100660247210) >> 128); int24 tickHi = int24((log_sqrt10001 + 291339464771989622907027621153398088495) >> 128); tick = tickLow == tickHi ? tickLow : getSqrtRatioAtTick(tickHi) <= sqrtPriceX96 ? tickHi : tickLow; } } // Part: Uniswap/[email protected]/UnsafeMath /// @title Math functions that do not check inputs or outputs /// @notice Contains methods that perform common math functions but do not do any overflow or underflow checks library UnsafeMath { /// @notice Returns ceil(x / y) /// @dev division by 0 has unspecified behavior, and must be checked externally /// @param x The dividend /// @param y The divisor /// @return z The quotient, ceil(x / y) function divRoundingUp(uint256 x, uint256 y) internal pure returns (uint256 z) { assembly { z := add(div(x, y), gt(mod(x, y), 0)) } } } // Part: Uniswap/[email protected]/PoolAddress /// @title Provides functions for deriving a pool address from the factory, tokens, and the fee library PoolAddress { bytes32 internal constant POOL_INIT_CODE_HASH = 0xe34f199b19b2b4f47f68442619d555527d244f78a3297ea89325f843f87b8b54; /// @notice The identifying key of the pool struct PoolKey { address token0; address token1; uint24 fee; } /// @notice Returns PoolKey: the ordered tokens with the matched fee levels /// @param tokenA The first token of a pool, unsorted /// @param tokenB The second token of a pool, unsorted /// @param fee The fee level of the pool /// @return Poolkey The pool details with ordered token0 and token1 assignments function getPoolKey( address tokenA, address tokenB, uint24 fee ) internal pure returns (PoolKey memory) { if (tokenA > tokenB) (tokenA, tokenB) = (tokenB, tokenA); return PoolKey({token0: tokenA, token1: tokenB, fee: fee}); } /// @notice Deterministically computes the pool address given the factory and PoolKey /// @param factory The Uniswap V3 factory contract address /// @param key The PoolKey /// @return pool The contract address of the V3 pool function computeAddress(address factory, PoolKey memory key) internal pure returns (address pool) { require(key.token0 < key.token1); pool = address( uint256( keccak256( abi.encodePacked( hex'ff', factory, keccak256(abi.encode(key.token0, key.token1, key.fee)), POOL_INIT_CODE_HASH ) ) ) ); } } // Part: Uniswap/[email protected]/PositionKey library PositionKey { /// @dev Returns the key of the position in the core library function compute( address owner, int24 tickLower, int24 tickUpper ) internal pure returns (bytes32) { return keccak256(abi.encodePacked(owner, tickLower, tickUpper)); } } // Part: Uniswap/[email protected]/TransferHelper library TransferHelper { /// @notice Transfers tokens from the targeted address to the given destination /// @notice Errors with 'STF' if transfer fails /// @param token The contract address of the token to be transferred /// @param from The originating address from which the tokens will be transferred /// @param to The destination address of the transfer /// @param value The amount to be transferred function safeTransferFrom( address token, address from, address to, uint256 value ) internal { (bool success, bytes memory data) = token.call(abi.encodeWithSelector(IERC20.transferFrom.selector, from, to, value)); require(success && (data.length == 0 || abi.decode(data, (bool))), 'STF'); } /// @notice Transfers tokens from msg.sender to a recipient /// @dev Errors with ST if transfer fails /// @param token The contract address of the token which will be transferred /// @param to The recipient of the transfer /// @param value The value of the transfer function safeTransfer( address token, address to, uint256 value ) internal { (bool success, bytes memory data) = token.call(abi.encodeWithSelector(IERC20.transfer.selector, to, value)); require(success && (data.length == 0 || abi.decode(data, (bool))), 'ST'); } /// @notice Approves the stipulated contract to spend the given allowance in the given token /// @dev Errors with 'SA' if transfer fails /// @param token The contract address of the token to be approved /// @param to The target of the approval /// @param value The amount of the given token the target will be allowed to spend function safeApprove( address token, address to, uint256 value ) internal { (bool success, bytes memory data) = token.call(abi.encodeWithSelector(IERC20.approve.selector, to, value)); require(success && (data.length == 0 || abi.decode(data, (bool))), 'SA'); } /// @notice Transfers ETH to the recipient address /// @dev Fails with `STE` /// @param to The destination of the transfer /// @param value The value to be transferred function safeTransferETH(address to, uint256 value) internal { (bool success, ) = to.call{value: value}(new bytes(0)); require(success, 'STE'); } } // Part: ILixirVaultToken interface ILixirVaultToken is IERC20, IERC20Permit {} // Part: OpenZeppelin/[email protected]/AccessControl /** * @dev Contract module that allows children to implement role-based access * control mechanisms. * * Roles are referred to by their `bytes32` identifier. These should be exposed * in the external API and be unique. The best way to achieve this is by * using `public constant` hash digests: * * ``` * bytes32 public constant MY_ROLE = keccak256("MY_ROLE"); * ``` * * Roles can be used to represent a set of permissions. To restrict access to a * function call, use {hasRole}: * * ``` * function foo() public { * require(hasRole(MY_ROLE, msg.sender)); * ... * } * ``` * * Roles can be granted and revoked dynamically via the {grantRole} and * {revokeRole} functions. Each role has an associated admin role, and only * accounts that have a role's admin role can call {grantRole} and {revokeRole}. * * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means * that only accounts with this role will be able to grant or revoke other * roles. More complex role relationships can be created by using * {_setRoleAdmin}. * * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to * grant and revoke this role. Extra precautions should be taken to secure * accounts that have been granted it. */ abstract contract AccessControl is Context { using EnumerableSet for EnumerableSet.AddressSet; using Address for address; struct RoleData { EnumerableSet.AddressSet members; bytes32 adminRole; } mapping (bytes32 => RoleData) private _roles; bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00; /** * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole` * * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite * {RoleAdminChanged} not being emitted signaling this. * * _Available since v3.1._ */ event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole); /** * @dev Emitted when `account` is granted `role`. * * `sender` is the account that originated the contract call, an admin role * bearer except when using {_setupRole}. */ event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Emitted when `account` is revoked `role`. * * `sender` is the account that originated the contract call: * - if using `revokeRole`, it is the admin role bearer * - if using `renounceRole`, it is the role bearer (i.e. `account`) */ event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) public view returns (bool) { return _roles[role].members.contains(account); } /** * @dev Returns the number of accounts that have `role`. Can be used * together with {getRoleMember} to enumerate all bearers of a role. */ function getRoleMemberCount(bytes32 role) public view returns (uint256) { return _roles[role].members.length(); } /** * @dev Returns one of the accounts that have `role`. `index` must be a * value between 0 and {getRoleMemberCount}, non-inclusive. * * Role bearers are not sorted in any particular way, and their ordering may * change at any point. * * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure * you perform all queries on the same block. See the following * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post] * for more information. */ function getRoleMember(bytes32 role, uint256 index) public view returns (address) { return _roles[role].members.at(index); } /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) public view returns (bytes32) { return _roles[role].adminRole; } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) public virtual { require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to grant"); _grantRole(role, account); } /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) public virtual { require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to revoke"); _revokeRole(role, account); } /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been granted `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole(bytes32 role, address account) public virtual { require(account == _msgSender(), "AccessControl: can only renounce roles for self"); _revokeRole(role, account); } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. Note that unlike {grantRole}, this function doesn't perform any * checks on the calling account. * * [WARNING] * ==== * This function should only be called from the constructor when setting * up the initial roles for the system. * * Using this function in any other way is effectively circumventing the admin * system imposed by {AccessControl}. * ==== */ function _setupRole(bytes32 role, address account) internal virtual { _grantRole(role, account); } /** * @dev Sets `adminRole` as ``role``'s admin role. * * Emits a {RoleAdminChanged} event. */ function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual { emit RoleAdminChanged(role, _roles[role].adminRole, adminRole); _roles[role].adminRole = adminRole; } function _grantRole(bytes32 role, address account) private { if (_roles[role].members.add(account)) { emit RoleGranted(role, account, _msgSender()); } } function _revokeRole(bytes32 role, address account) private { if (_roles[role].members.remove(account)) { emit RoleRevoked(role, account, _msgSender()); } } } // Part: OpenZeppelin/[email protected]/Initializable /** * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed * behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect. * * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as * possible by providing the encoded function call as the `_data` argument to {UpgradeableProxy-constructor}. * * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity. */ abstract contract Initializable { /** * @dev Indicates that the contract has been initialized. */ bool private _initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private _initializing; /** * @dev Modifier to protect an initializer function from being invoked twice. */ modifier initializer() { require(_initializing || _isConstructor() || !_initialized, "Initializable: contract is already initialized"); bool isTopLevelCall = !_initializing; if (isTopLevelCall) { _initializing = true; _initialized = true; } _; if (isTopLevelCall) { _initializing = false; } } /// @dev Returns true if and only if the function is running in the constructor function _isConstructor() private view returns (bool) { return !Address.isContract(address(this)); } } // Part: OpenZeppelin/[email protected]/Pausable /** * @dev Contract module which allows children to implement an emergency stop * mechanism that can be triggered by an authorized account. * * This module is used through inheritance. It will make available the * modifiers `whenNotPaused` and `whenPaused`, which can be applied to * the functions of your contract. Note that they will not be pausable by * simply including this module, only once the modifiers are put in place. */ abstract contract Pausable is Context { /** * @dev Emitted when the pause is triggered by `account`. */ event Paused(address account); /** * @dev Emitted when the pause is lifted by `account`. */ event Unpaused(address account); bool private _paused; /** * @dev Initializes the contract in unpaused state. */ constructor () { _paused = false; } /** * @dev Returns true if the contract is paused, and false otherwise. */ function paused() public view virtual returns (bool) { return _paused; } /** * @dev Modifier to make a function callable only when the contract is not paused. * * Requirements: * * - The contract must not be paused. */ modifier whenNotPaused() { require(!paused(), "Pausable: paused"); _; } /** * @dev Modifier to make a function callable only when the contract is paused. * * Requirements: * * - The contract must be paused. */ modifier whenPaused() { require(paused(), "Pausable: not paused"); _; } /** * @dev Triggers stopped state. * * Requirements: * * - The contract must not be paused. */ function _pause() internal virtual whenNotPaused { _paused = true; emit Paused(_msgSender()); } /** * @dev Returns to normal state. * * Requirements: * * - The contract must be paused. */ function _unpause() internal virtual whenPaused { _paused = false; emit Unpaused(_msgSender()); } } // Part: SqrtPriceMath /// @title Functions based on Q64.96 sqrt price and liquidity /// @notice Contains the math that uses square root of price as a Q64.96 and liquidity to compute deltas library SqrtPriceMath { using LowGasSafeMath for uint256; using SafeCast for uint256; /// @notice Gets the next sqrt price given a delta of token0 /// @dev Always rounds up, because in the exact output case (increasing price) we need to move the price at least /// far enough to get the desired output amount, and in the exact input case (decreasing price) we need to move the /// price less in order to not send too much output. /// The most precise formula for this is liquidity * sqrtPX96 / (liquidity +- amount * sqrtPX96), /// if this is impossible because of overflow, we calculate liquidity / (liquidity / sqrtPX96 +- amount). /// @param sqrtPX96 The starting price, i.e. before accounting for the token0 delta /// @param liquidity The amount of usable liquidity /// @param amount How much of token0 to add or remove from virtual reserves /// @param add Whether to add or remove the amount of token0 /// @return The price after adding or removing amount, depending on add function getNextSqrtPriceFromAmount0RoundingUp( uint160 sqrtPX96, uint128 liquidity, uint256 amount, bool add ) internal pure returns (uint160) { // we short circuit amount == 0 because the result is otherwise not guaranteed to equal the input price if (amount == 0) return sqrtPX96; uint256 numerator1 = uint256(liquidity) << FixedPoint96.RESOLUTION; if (add) { uint256 product; if ((product = amount * sqrtPX96) / amount == sqrtPX96) { uint256 denominator = numerator1 + product; if (denominator >= numerator1) // always fits in 160 bits return uint160(FullMath.mulDivRoundingUp(numerator1, sqrtPX96, denominator)); } return uint160(UnsafeMath.divRoundingUp(numerator1, (numerator1 / sqrtPX96).add(amount))); } else { uint256 product; // if the product overflows, we know the denominator underflows // in addition, we must check that the denominator does not underflow require((product = amount * sqrtPX96) / amount == sqrtPX96 && numerator1 > product); uint256 denominator = numerator1 - product; return FullMath.mulDivRoundingUp(numerator1, sqrtPX96, denominator).toUint160(); } } /// @notice Gets the next sqrt price given a delta of token1 /// @dev Always rounds down, because in the exact output case (decreasing price) we need to move the price at least /// far enough to get the desired output amount, and in the exact input case (increasing price) we need to move the /// price less in order to not send too much output. /// The formula we compute is within <1 wei of the lossless version: sqrtPX96 +- amount / liquidity /// @param sqrtPX96 The starting price, i.e., before accounting for the token1 delta /// @param liquidity The amount of usable liquidity /// @param amount How much of token1 to add, or remove, from virtual reserves /// @param add Whether to add, or remove, the amount of token1 /// @return The price after adding or removing `amount` function getNextSqrtPriceFromAmount1RoundingDown( uint160 sqrtPX96, uint128 liquidity, uint256 amount, bool add ) internal pure returns (uint160) { // if we're adding (subtracting), rounding down requires rounding the quotient down (up) // in both cases, avoid a mulDiv for most inputs if (add) { uint256 quotient = ( amount <= type(uint160).max ? (amount << FixedPoint96.RESOLUTION) / liquidity : FullMath.mulDiv(amount, FixedPoint96.Q96, liquidity) ); return uint256(sqrtPX96).add(quotient).toUint160(); } else { uint256 quotient = ( amount <= type(uint160).max ? UnsafeMath.divRoundingUp(amount << FixedPoint96.RESOLUTION, liquidity) : FullMath.mulDivRoundingUp(amount, FixedPoint96.Q96, liquidity) ); require(sqrtPX96 > quotient); // always fits 160 bits return uint160(sqrtPX96 - quotient); } } /// @notice Gets the next sqrt price given an input amount of token0 or token1 /// @dev Throws if price or liquidity are 0, or if the next price is out of bounds /// @param sqrtPX96 The starting price, i.e., before accounting for the input amount /// @param liquidity The amount of usable liquidity /// @param amountIn How much of token0, or token1, is being swapped in /// @param zeroForOne Whether the amount in is token0 or token1 /// @return sqrtQX96 The price after adding the input amount to token0 or token1 function getNextSqrtPriceFromInput( uint160 sqrtPX96, uint128 liquidity, uint256 amountIn, bool zeroForOne ) internal pure returns (uint160 sqrtQX96) { require(sqrtPX96 > 0); require(liquidity > 0); // round to make sure that we don't pass the target price return zeroForOne ? getNextSqrtPriceFromAmount0RoundingUp(sqrtPX96, liquidity, amountIn, true) : getNextSqrtPriceFromAmount1RoundingDown(sqrtPX96, liquidity, amountIn, true); } /// @notice Gets the next sqrt price given an output amount of token0 or token1 /// @dev Throws if price or liquidity are 0 or the next price is out of bounds /// @param sqrtPX96 The starting price before accounting for the output amount /// @param liquidity The amount of usable liquidity /// @param amountOut How much of token0, or token1, is being swapped out /// @param zeroForOne Whether the amount out is token0 or token1 /// @return sqrtQX96 The price after removing the output amount of token0 or token1 function getNextSqrtPriceFromOutput( uint160 sqrtPX96, uint128 liquidity, uint256 amountOut, bool zeroForOne ) internal pure returns (uint160 sqrtQX96) { require(sqrtPX96 > 0); require(liquidity > 0); // round to make sure that we pass the target price return zeroForOne ? getNextSqrtPriceFromAmount1RoundingDown(sqrtPX96, liquidity, amountOut, false) : getNextSqrtPriceFromAmount0RoundingUp(sqrtPX96, liquidity, amountOut, false); } /// @notice Gets the amount0 delta between two prices /// @dev Calculates liquidity / sqrt(lower) - liquidity / sqrt(upper), /// i.e. liquidity * (sqrt(upper) - sqrt(lower)) / (sqrt(upper) * sqrt(lower)) /// @param sqrtRatioAX96 A sqrt price /// @param sqrtRatioBX96 Another sqrt price /// @param liquidity The amount of usable liquidity /// @param roundUp Whether to round the amount up or down /// @return amount0 Amount of token0 required to cover a position of size liquidity between the two passed prices function getAmount0Delta( uint160 sqrtRatioAX96, uint160 sqrtRatioBX96, uint128 liquidity, bool roundUp ) internal pure returns (uint256 amount0) { if (sqrtRatioAX96 > sqrtRatioBX96) (sqrtRatioAX96, sqrtRatioBX96) = (sqrtRatioBX96, sqrtRatioAX96); uint256 numerator1 = uint256(liquidity) << FixedPoint96.RESOLUTION; uint256 numerator2 = sqrtRatioBX96 - sqrtRatioAX96; require(sqrtRatioAX96 > 0); return roundUp ? UnsafeMath.divRoundingUp( FullMath.mulDivRoundingUp(numerator1, numerator2, sqrtRatioBX96), sqrtRatioAX96 ) : FullMath.mulDiv(numerator1, numerator2, sqrtRatioBX96) / sqrtRatioAX96; } /// @notice Gets the amount1 delta between two prices /// @dev Calculates liquidity * (sqrt(upper) - sqrt(lower)) /// @param sqrtRatioAX96 A sqrt price /// @param sqrtRatioBX96 Another sqrt price /// @param liquidity The amount of usable liquidity /// @param roundUp Whether to round the amount up, or down /// @return amount1 Amount of token1 required to cover a position of size liquidity between the two passed prices function getAmount1Delta( uint160 sqrtRatioAX96, uint160 sqrtRatioBX96, uint128 liquidity, bool roundUp ) internal pure returns (uint256 amount1) { if (sqrtRatioAX96 > sqrtRatioBX96) (sqrtRatioAX96, sqrtRatioBX96) = (sqrtRatioBX96, sqrtRatioAX96); return roundUp ? FullMath.mulDivRoundingUp(liquidity, sqrtRatioBX96 - sqrtRatioAX96, FixedPoint96.Q96) : FullMath.mulDiv(liquidity, sqrtRatioBX96 - sqrtRatioAX96, FixedPoint96.Q96); } /// @notice Helper that gets signed token0 delta /// @param sqrtRatioAX96 A sqrt price /// @param sqrtRatioBX96 Another sqrt price /// @param liquidity The change in liquidity for which to compute the amount0 delta /// @return amount0 Amount of token0 corresponding to the passed liquidityDelta between the two prices function getAmount0Delta( uint160 sqrtRatioAX96, uint160 sqrtRatioBX96, int128 liquidity ) internal pure returns (int256 amount0) { return liquidity < 0 ? -getAmount0Delta(sqrtRatioAX96, sqrtRatioBX96, uint128(-liquidity), false).toInt256() : getAmount0Delta(sqrtRatioAX96, sqrtRatioBX96, uint128(liquidity), true).toInt256(); } /// @notice Helper that gets signed token1 delta /// @param sqrtRatioAX96 A sqrt price /// @param sqrtRatioBX96 Another sqrt price /// @param liquidity The change in liquidity for which to compute the amount1 delta /// @return amount1 Amount of token1 corresponding to the passed liquidityDelta between the two prices function getAmount1Delta( uint160 sqrtRatioAX96, uint160 sqrtRatioBX96, int128 liquidity ) internal pure returns (int256 amount1) { return liquidity < 0 ? -getAmount1Delta(sqrtRatioAX96, sqrtRatioBX96, uint128(-liquidity), false).toInt256() : getAmount1Delta(sqrtRatioAX96, sqrtRatioBX96, uint128(liquidity), true).toInt256(); } } // Part: Uniswap/[email protected]/IUniswapV3Pool /// @title The interface for a Uniswap V3 Pool /// @notice A Uniswap pool facilitates swapping and automated market making between any two assets that strictly conform /// to the ERC20 specification /// @dev The pool interface is broken up into many smaller pieces interface IUniswapV3Pool is IUniswapV3PoolImmutables, IUniswapV3PoolState, IUniswapV3PoolDerivedState, IUniswapV3PoolActions, IUniswapV3PoolOwnerActions, IUniswapV3PoolEvents { } // Part: Uniswap/[email protected]/IWETH9 /// @title Interface for WETH9 interface IWETH9 is IERC20 { /// @notice Deposit ether to get wrapped ether function deposit() external payable; /// @notice Withdraw wrapped ether to get ether function withdraw(uint256) external; } // Part: Uniswap/[email protected]/LiquidityAmounts /// @title Liquidity amount functions /// @notice Provides functions for computing liquidity amounts from token amounts and prices library LiquidityAmounts { /// @notice Downcasts uint256 to uint128 /// @param x The uint258 to be downcasted /// @return y The passed value, downcasted to uint128 function toUint128(uint256 x) private pure returns (uint128 y) { require((y = uint128(x)) == x); } /// @notice Computes the amount of liquidity received for a given amount of token0 and price range /// @dev Calculates amount0 * (sqrt(upper) * sqrt(lower)) / (sqrt(upper) - sqrt(lower)) /// @param sqrtRatioAX96 A sqrt price representing the first tick boundary /// @param sqrtRatioBX96 A sqrt price representing the second tick boundary /// @param amount0 The amount0 being sent in /// @return liquidity The amount of returned liquidity function getLiquidityForAmount0( uint160 sqrtRatioAX96, uint160 sqrtRatioBX96, uint256 amount0 ) internal pure returns (uint128 liquidity) { if (sqrtRatioAX96 > sqrtRatioBX96) (sqrtRatioAX96, sqrtRatioBX96) = (sqrtRatioBX96, sqrtRatioAX96); uint256 intermediate = FullMath.mulDiv(sqrtRatioAX96, sqrtRatioBX96, FixedPoint96.Q96); return toUint128(FullMath.mulDiv(amount0, intermediate, sqrtRatioBX96 - sqrtRatioAX96)); } /// @notice Computes the amount of liquidity received for a given amount of token1 and price range /// @dev Calculates amount1 / (sqrt(upper) - sqrt(lower)). /// @param sqrtRatioAX96 A sqrt price representing the first tick boundary /// @param sqrtRatioBX96 A sqrt price representing the second tick boundary /// @param amount1 The amount1 being sent in /// @return liquidity The amount of returned liquidity function getLiquidityForAmount1( uint160 sqrtRatioAX96, uint160 sqrtRatioBX96, uint256 amount1 ) internal pure returns (uint128 liquidity) { if (sqrtRatioAX96 > sqrtRatioBX96) (sqrtRatioAX96, sqrtRatioBX96) = (sqrtRatioBX96, sqrtRatioAX96); return toUint128(FullMath.mulDiv(amount1, FixedPoint96.Q96, sqrtRatioBX96 - sqrtRatioAX96)); } /// @notice Computes the maximum amount of liquidity received for a given amount of token0, token1, the current /// pool prices and the prices at the tick boundaries /// @param sqrtRatioX96 A sqrt price representing the current pool prices /// @param sqrtRatioAX96 A sqrt price representing the first tick boundary /// @param sqrtRatioBX96 A sqrt price representing the second tick boundary /// @param amount0 The amount of token0 being sent in /// @param amount1 The amount of token1 being sent in /// @return liquidity The maximum amount of liquidity received function getLiquidityForAmounts( uint160 sqrtRatioX96, uint160 sqrtRatioAX96, uint160 sqrtRatioBX96, uint256 amount0, uint256 amount1 ) internal pure returns (uint128 liquidity) { if (sqrtRatioAX96 > sqrtRatioBX96) (sqrtRatioAX96, sqrtRatioBX96) = (sqrtRatioBX96, sqrtRatioAX96); if (sqrtRatioX96 <= sqrtRatioAX96) { liquidity = getLiquidityForAmount0(sqrtRatioAX96, sqrtRatioBX96, amount0); } else if (sqrtRatioX96 < sqrtRatioBX96) { uint128 liquidity0 = getLiquidityForAmount0(sqrtRatioX96, sqrtRatioBX96, amount0); uint128 liquidity1 = getLiquidityForAmount1(sqrtRatioAX96, sqrtRatioX96, amount1); liquidity = liquidity0 < liquidity1 ? liquidity0 : liquidity1; } else { liquidity = getLiquidityForAmount1(sqrtRatioAX96, sqrtRatioBX96, amount1); } } /// @notice Computes the amount of token0 for a given amount of liquidity and a price range /// @param sqrtRatioAX96 A sqrt price representing the first tick boundary /// @param sqrtRatioBX96 A sqrt price representing the second tick boundary /// @param liquidity The liquidity being valued /// @return amount0 The amount of token0 function getAmount0ForLiquidity( uint160 sqrtRatioAX96, uint160 sqrtRatioBX96, uint128 liquidity ) internal pure returns (uint256 amount0) { if (sqrtRatioAX96 > sqrtRatioBX96) (sqrtRatioAX96, sqrtRatioBX96) = (sqrtRatioBX96, sqrtRatioAX96); return FullMath.mulDiv( uint256(liquidity) << FixedPoint96.RESOLUTION, sqrtRatioBX96 - sqrtRatioAX96, sqrtRatioBX96 ) / sqrtRatioAX96; } /// @notice Computes the amount of token1 for a given amount of liquidity and a price range /// @param sqrtRatioAX96 A sqrt price representing the first tick boundary /// @param sqrtRatioBX96 A sqrt price representing the second tick boundary /// @param liquidity The liquidity being valued /// @return amount1 The amount of token1 function getAmount1ForLiquidity( uint160 sqrtRatioAX96, uint160 sqrtRatioBX96, uint128 liquidity ) internal pure returns (uint256 amount1) { if (sqrtRatioAX96 > sqrtRatioBX96) (sqrtRatioAX96, sqrtRatioBX96) = (sqrtRatioBX96, sqrtRatioAX96); return FullMath.mulDiv(liquidity, sqrtRatioBX96 - sqrtRatioAX96, FixedPoint96.Q96); } /// @notice Computes the token0 and token1 value for a given amount of liquidity, the current /// pool prices and the prices at the tick boundaries /// @param sqrtRatioX96 A sqrt price representing the current pool prices /// @param sqrtRatioAX96 A sqrt price representing the first tick boundary /// @param sqrtRatioBX96 A sqrt price representing the second tick boundary /// @param liquidity The liquidity being valued /// @return amount0 The amount of token0 /// @return amount1 The amount of token1 function getAmountsForLiquidity( uint160 sqrtRatioX96, uint160 sqrtRatioAX96, uint160 sqrtRatioBX96, uint128 liquidity ) internal pure returns (uint256 amount0, uint256 amount1) { if (sqrtRatioAX96 > sqrtRatioBX96) (sqrtRatioAX96, sqrtRatioBX96) = (sqrtRatioBX96, sqrtRatioAX96); if (sqrtRatioX96 <= sqrtRatioAX96) { amount0 = getAmount0ForLiquidity(sqrtRatioAX96, sqrtRatioBX96, liquidity); } else if (sqrtRatioX96 < sqrtRatioBX96) { amount0 = getAmount0ForLiquidity(sqrtRatioX96, sqrtRatioBX96, liquidity); amount1 = getAmount1ForLiquidity(sqrtRatioAX96, sqrtRatioX96, liquidity); } else { amount1 = getAmount1ForLiquidity(sqrtRatioAX96, sqrtRatioBX96, liquidity); } } } // Part: EIP712Initializable /** * @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data. * * The encoding specified in the EIP is very generic, and such a generic implementation in Solidity is not feasible, * thus this contract does not implement the encoding itself. Protocols need to implement the type-specific encoding * they need in their contracts using a combination of `abi.encode` and `keccak256`. * * This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding * scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA * ({_hashTypedDataV4}). * * The implementation of the domain separator was designed to be as efficient as possible while still properly updating * the chain id to protect against replay attacks on an eventual fork of the chain. * * NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method * https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask]. * * _Available since v3.4._ */ abstract contract EIP712Initializable is Initializable { /* solhint-disable var-name-mixedcase */ bytes32 private _HASHED_NAME; bytes32 private immutable _HASHED_VERSION; bytes32 private immutable _TYPE_HASH; constructor(string memory version) { _HASHED_VERSION = keccak256(bytes(version)); _TYPE_HASH = keccak256( 'EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)' ); } /* solhint-enable var-name-mixedcase */ /** * @dev Initializes the domain separator and parameter caches. * * The meaning of `name` and `version` is specified in * https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]: * * - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol. * - `version`: the current major version of the signing domain. * * NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart * contract upgrade]. */ function __EIP712__initialize(string memory name) internal initializer { _HASHED_NAME = keccak256(bytes(name)); } /** * @dev Returns the domain separator for the current chain. */ function _domainSeparatorV4() internal view virtual returns (bytes32) { return keccak256( abi.encode( _TYPE_HASH, _HASHED_NAME, _HASHED_VERSION, _getChainId(), address(this) ) ); } /** * @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this * function returns the hash of the fully encoded EIP712 message for this domain. * * This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example: * * ```solidity * bytes32 digest = _hashTypedDataV4(keccak256(abi.encode( * keccak256("Mail(address to,string contents)"), * mailTo, * keccak256(bytes(mailContents)) * ))); * address signer = ECDSA.recover(digest, signature); * ``` */ function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) { return keccak256(abi.encodePacked('\x19\x01', _domainSeparatorV4(), structHash)); } function _getChainId() private view returns (uint256 chainId) { // Silence state mutability warning without generating bytecode. // See https://github.com/ethereum/solidity/issues/10090#issuecomment-741789128 and // https://github.com/ethereum/solidity/issues/2691 this; // solhint-disable-next-line no-inline-assembly assembly { chainId := chainid() } } } // Part: ILixirVault interface ILixirVault is ILixirVaultToken { function initialize( string memory name, string memory symbol, address _token0, address _token1, address _strategist, address _keeper, address _strategy ) external; function token0() external view returns (IERC20); function token1() external view returns (IERC20); function activeFee() external view returns (uint24); function activePool() external view returns (IUniswapV3Pool); function strategist() external view returns (address); function strategy() external view returns (address); function keeper() external view returns (address); function setKeeper(address _keeper) external; function setStrategist(address _strategist) external; function setStrategy(address _strategy) external; function setPerformanceFee(uint24 newFee) external; function emergencyExit() external; function unpause() external; function mainPosition() external view returns (int24 tickLower, int24 tickUpper); function rangePosition() external view returns (int24 tickLower, int24 tickUpper); function rebalance( int24 mainTickLower, int24 mainTickUpper, int24 rangeTickLower0, int24 rangeTickUpper0, int24 rangeTickLower1, int24 rangeTickUpper1, uint24 fee ) external; function withdraw( uint256 shares, uint256 amount0Min, uint256 amount1Min, address receiver, uint256 deadline ) external returns (uint256 amount0Out, uint256 amount1Out); function withdrawFrom( address withdrawer, uint256 shares, uint256 amount0Min, uint256 amount1Min, address recipient, uint256 deadline ) external returns (uint256 amount0Out, uint256 amount1Out); function deposit( uint256 amount0Desired, uint256 amount1Desired, uint256 amount0Min, uint256 amount1Min, address recipient, uint256 deadline ) external returns ( uint256 shares, uint256 amount0, uint256 amount1 ); function calculateTotalsFromTick(int24 virtualTick) external view returns ( uint256 total0, uint256 total1, uint128 mL, uint128 rL ); } // Part: LixirRegistry /** @notice an access control contract with roles used to handle permissioning throughout the `Vault` and `Strategy` contracts. */ contract LixirRegistry is AccessControl { address public immutable uniV3Factory; IWETH9 public immutable weth9; /// king bytes32 public constant gov_role = keccak256('v1_gov_role'); /// same privileges as `gov_role` bytes32 public constant delegate_role = keccak256('v1_delegate_role'); /// configuring options within the strategy contract & vault bytes32 public constant strategist_role = keccak256('v1_strategist_role'); /// can `emergencyExit` a vault bytes32 public constant pauser_role = keccak256('v1_pauser_role'); /// can `rebalance` the vault via the strategy contract bytes32 public constant keeper_role = keccak256('v1_keeper_role'); /// can `createVault`s from the factory contract bytes32 public constant deployer_role = keccak256('v1_deployer_role'); /// verified vault in the registry bytes32 public constant vault_role = keccak256('v1_vault_role'); /// can initialize vaults bytes32 public constant strategy_role = keccak256('v1_strategy_role'); bytes32 public constant vault_implementation_role = keccak256('v1_vault_implementation_role'); bytes32 public constant eth_vault_implementation_role = keccak256('v1_eth_vault_implementation_role'); /// verified vault factory in the registry bytes32 public constant factory_role = keccak256('v1_factory_role'); /// can `setPerformanceFee` on a vault bytes32 public constant fee_setter_role = keccak256('fee_setter_role'); address public feeTo; address public emergencyReturn; uint24 public constant PERFORMANCE_FEE_PRECISION = 1e6; event FeeToChanged(address indexed previousFeeTo, address indexed newFeeTo); event EmergencyReturnChanged( address indexed previousEmergencyReturn, address indexed newEmergencyReturn ); constructor( address _governance, address _delegate, address _uniV3Factory, address _weth9 ) { uniV3Factory = _uniV3Factory; weth9 = IWETH9(_weth9); _setupRole(gov_role, _governance); _setupRole(delegate_role, _delegate); // gov is its own admin _setRoleAdmin(gov_role, gov_role); _setRoleAdmin(delegate_role, gov_role); _setRoleAdmin(strategist_role, delegate_role); _setRoleAdmin(fee_setter_role, delegate_role); _setRoleAdmin(pauser_role, delegate_role); _setRoleAdmin(keeper_role, delegate_role); _setRoleAdmin(deployer_role, delegate_role); _setRoleAdmin(factory_role, delegate_role); _setRoleAdmin(strategy_role, delegate_role); _setRoleAdmin(vault_implementation_role, delegate_role); _setRoleAdmin(eth_vault_implementation_role, delegate_role); _setRoleAdmin(vault_role, factory_role); } function addRole(bytes32 role, bytes32 roleAdmin) public { require(isGovOrDelegate(msg.sender)); require(getRoleAdmin(role) == bytes32(0) && getRoleMemberCount(role) == 0); _setRoleAdmin(role, roleAdmin); } function isGovOrDelegate(address account) public view returns (bool) { return hasRole(gov_role, account) || hasRole(delegate_role, account); } function setFeeTo(address _feeTo) external { require(isGovOrDelegate(msg.sender)); address previous = feeTo; feeTo = _feeTo; emit FeeToChanged(previous, _feeTo); } function setEmergencyReturn(address _emergencyReturn) external { require(isGovOrDelegate(msg.sender)); address previous = emergencyReturn; emergencyReturn = _emergencyReturn; emit EmergencyReturnChanged(previous, _emergencyReturn); } } // Part: LixirBase /** @notice An abstract contract that gives access to the registry and contains common modifiers for restricting access to functions based on role. */ abstract contract LixirBase { LixirRegistry public immutable registry; constructor(address _registry) { registry = LixirRegistry(_registry); } modifier onlyRole(bytes32 role) { require(registry.hasRole(role, msg.sender)); _; } modifier onlyGovOrDelegate { require(registry.isGovOrDelegate(msg.sender)); _; } modifier hasRole(bytes32 role, address account) { require(registry.hasRole(role, account)); _; } } // Part: LixirVaultToken /** * @title Highly opinionated token implementation * @author Balancer Labs * @dev * - Includes functions to increase and decrease allowance as a workaround * for the well-known issue with `approve`: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * - Allows for 'infinite allowance', where an allowance of 0xff..ff is not * decreased by calls to transferFrom * - Lets a token holder use `transferFrom` to send their own tokens, * without first setting allowance * - Emits 'Approval' events whenever allowance is changed by `transferFrom` */ contract LixirVaultToken is ILixirVaultToken, EIP712Initializable { using SafeMath for uint256; // State variables uint8 private constant _DECIMALS = 18; mapping(address => uint256) private _balance; mapping(address => mapping(address => uint256)) _allowance; uint256 private _totalSupply; string private _name; string private _symbol; mapping(address => uint256) private _nonces; // solhint-disable-next-line var-name-mixedcase bytes32 private immutable _PERMIT_TYPE_HASH = keccak256( 'Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)' ); constructor() EIP712Initializable('1') {} // Function declarations function __LixirVaultToken__initialize( string memory tokenName, string memory tokenSymbol ) internal initializer { __EIP712__initialize(tokenName); _name = tokenName; _symbol = tokenSymbol; } // External functions function allowance(address owner, address spender) public view override returns (uint256) { return _allowance[owner][spender]; } function balanceOf(address account) external view override returns (uint256) { return _balance[account]; } function approve(address spender, uint256 amount) external override returns (bool) { _setAllowance(msg.sender, spender, amount); return true; } function increaseApproval(address spender, uint256 amount) external returns (bool) { _setAllowance( msg.sender, spender, _allowance[msg.sender][spender].add(amount) ); return true; } function decreaseApproval(address spender, uint256 amount) external returns (bool) { uint256 currentAllowance = _allowance[msg.sender][spender]; if (amount >= currentAllowance) { _setAllowance(msg.sender, spender, 0); } else { _setAllowance(msg.sender, spender, currentAllowance.sub(amount)); } return true; } function transfer(address recipient, uint256 amount) external override returns (bool) { _move(msg.sender, recipient, amount); return true; } function transferFrom( address sender, address recipient, uint256 amount ) external override returns (bool) { uint256 currentAllowance = _allowance[sender][msg.sender]; LixirErrors.require_INSUFFICIENT_ALLOWANCE( msg.sender == sender || currentAllowance >= amount ); _move(sender, recipient, amount); if (msg.sender != sender && currentAllowance != type(uint256).max) { // Because of the previous require, we know that if msg.sender != sender then currentAllowance >= amount _setAllowance(sender, msg.sender, currentAllowance - amount); } return true; } function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) public virtual override { // solhint-disable-next-line not-rely-on-time LixirErrors.require_PERMIT_EXPIRED(block.timestamp <= deadline); uint256 nonce = _nonces[owner]; bytes32 structHash = keccak256( abi.encode(_PERMIT_TYPE_HASH, owner, spender, value, nonce, deadline) ); bytes32 hash = _hashTypedDataV4(structHash); address signer = ecrecover(hash, v, r, s); LixirErrors.require_INVALID_SIGNATURE( signer != address(0) && signer == owner ); _nonces[owner] = nonce + 1; _setAllowance(owner, spender, value); } // Public functions function name() public view returns (string memory) { return _name; } function symbol() public view returns (string memory) { return _symbol; } function decimals() public pure returns (uint8) { return _DECIMALS; } function totalSupply() public view override returns (uint256) { return _totalSupply; } function nonces(address owner) external view override returns (uint256) { return _nonces[owner]; } // solhint-disable-next-line func-name-mixedcase function DOMAIN_SEPARATOR() external view override returns (bytes32) { return _domainSeparatorV4(); } // Internal functions function _beforeMintCallback(address recipient, uint256 amount) internal virtual {} function _mintPoolTokens(address recipient, uint256 amount) internal { _beforeMintCallback(recipient, amount); _balance[recipient] = _balance[recipient].add(amount); _totalSupply = _totalSupply.add(amount); emit Transfer(address(0), recipient, amount); } function _burnPoolTokens(address sender, uint256 amount) internal { uint256 currentBalance = _balance[sender]; LixirErrors.require_INSUFFICIENT_BALANCE(currentBalance >= amount); _balance[sender] = currentBalance - amount; _totalSupply = _totalSupply.sub(amount); emit Transfer(sender, address(0), amount); } function _move( address sender, address recipient, uint256 amount ) internal { uint256 currentBalance = _balance[sender]; LixirErrors.require_INSUFFICIENT_BALANCE(currentBalance >= amount); // Prohibit transfers to the zero address to avoid confusion with the // Transfer event emitted by `_burnPoolTokens` LixirErrors.require_XFER_ZERO_ADDRESS(recipient != address(0)); _balance[sender] = currentBalance - amount; _balance[recipient] = _balance[recipient].add(amount); emit Transfer(sender, recipient, amount); } function _setAllowance( address owner, address spender, uint256 amount ) internal { _allowance[owner][spender] = amount; emit Approval(owner, spender, amount); } } // File: LixirVault.sol contract LixirVault is ILixirVault, LixirVaultToken, LixirBase, IUniswapV3MintCallback, Pausable { using LowGasSafeMath for uint256; using SafeCast for uint256; using SafeCast for int256; using SafeCast for uint128; IERC20 public override token0; IERC20 public override token1; uint24 public override activeFee; IUniswapV3Pool public override activePool; address public override strategy; address public override strategist; address public override keeper; Position public override mainPosition; Position public override rangePosition; uint24 public performanceFee; uint24 immutable PERFORMANCE_FEE_PRECISION; address immutable uniV3Factory; event Deposit( address indexed depositor, address indexed recipient, uint256 shares, uint256 amount0In, uint256 amount1In, uint256 total0, uint256 total1 ); event Withdraw( address indexed withdrawer, address indexed recipient, uint256 shares, uint256 amount0Out, uint256 amount1Out ); event Rebalance( int24 mainTickLower, int24 mainTickUpper, int24 rangeTickLower, int24 rangeTickUpper, uint24 newFee, uint256 total0, uint256 total1 ); event PerformanceFeeSet(uint24 oldFee, uint24 newFee); event StrategySet(address oldStrategy, address newStrategy); struct DepositPositionData { uint128 LDelta; int24 tickLower; int24 tickUpper; } enum POSITION {MAIN, RANGE} // details about the uniswap position struct Position { // the tick range of the position int24 tickLower; int24 tickUpper; } constructor(address _registry) LixirBase(_registry) { PERFORMANCE_FEE_PRECISION = LixirRegistry(_registry) .PERFORMANCE_FEE_PRECISION(); uniV3Factory = LixirRegistry(_registry).uniV3Factory(); } /** @notice sets fields in the contract and initializes the `LixirVaultToken` */ function initialize( string memory name, string memory symbol, address _token0, address _token1, address _strategist, address _keeper, address _strategy ) public virtual override hasRole(LixirRoles.strategist_role, _strategist) hasRole(LixirRoles.keeper_role, _keeper) hasRole(LixirRoles.strategy_role, _strategy) initializer { require(_token0 < _token1); __LixirVaultToken__initialize(name, symbol); token0 = IERC20(_token0); token1 = IERC20(_token1); strategist = _strategist; keeper = _keeper; strategy = _strategy; } modifier onlyStrategist() { require(msg.sender == strategist); _; } modifier onlyStrategy() { require(msg.sender == strategy); _; } modifier notExpired(uint256 deadline) { require(block.timestamp <= deadline, 'Expired'); _; } /** @dev calculates shares, totals, etc. to mint the proper amount of `LixirVaultToken`s to `recipient` */ function _depositStepOne( uint256 amount0Desired, uint256 amount1Desired, uint256 amount0Min, uint256 amount1Min, address recipient ) internal returns ( DepositPositionData memory mainData, DepositPositionData memory rangeData, uint256 shares, uint256 amount0In, uint256 amount1In, uint256 total0, uint256 total1 ) { uint256 _totalSupply = totalSupply(); mainData = DepositPositionData({ LDelta: 0, tickLower: mainPosition.tickLower, tickUpper: mainPosition.tickUpper }); rangeData = DepositPositionData({ LDelta: 0, tickLower: rangePosition.tickLower, tickUpper: rangePosition.tickUpper }); if (_totalSupply == 0) { (shares, mainData.LDelta, amount0In, amount1In) = calculateInitialDeposit( amount0Desired, amount1Desired ); total0 = amount0In; total1 = amount1In; } else { uint128 mL; uint128 rL; { (uint160 sqrtRatioX96, int24 tick) = getSqrtRatioX96AndTick(); (total0, total1, mL, rL) = _calculateTotals( sqrtRatioX96, tick, mainData, rangeData ); } (shares, amount0In, amount1In) = calcSharesAndAmounts( amount0Desired, amount1Desired, total0, total1, _totalSupply ); mainData.LDelta = uint128(FullMath.mulDiv(mL, shares, _totalSupply)); rangeData.LDelta = uint128(FullMath.mulDiv(rL, shares, _totalSupply)); } LixirErrors.require_INSUFFICIENT_OUTPUT_AMOUNT( amount0Min <= amount0In && amount1Min <= amount1In ); _mintPoolTokens(recipient, shares); } /** @dev this function deposits the tokens into the UniV3 pool */ function _depositStepTwo( DepositPositionData memory mainData, DepositPositionData memory rangeData, address recipient, uint256 shares, uint256 amount0In, uint256 amount1In, uint256 total0, uint256 total1 ) internal { uint128 mLDelta = mainData.LDelta; if (0 < mLDelta) { activePool.mint( address(this), mainData.tickLower, mainData.tickUpper, mLDelta, '' ); } uint128 rLDelta = rangeData.LDelta; if (0 < rLDelta) { activePool.mint( address(this), rangeData.tickLower, rangeData.tickUpper, rLDelta, '' ); } emit Deposit( address(msg.sender), address(recipient), shares, amount0In, amount1In, total0, total1 ); } /** @notice deposit's the callers ERC20 tokens into the vault, mints them `LixirVaultToken`s, and adds their liquidity to the UniswapV3 pool. @param amount0Desired Amount of token 0 desired by user @param amount1Desired Amount of token 1 desired by user @param amount0Min Minimum amount of token 0 desired by user @param amount1Min Minimum amount of token 1 desired by user @param recipient The address for which the liquidity will be created @param deadline Blocktimestamp that this must execute before @return shares @return amount0In how much token0 was actually deposited @return amount1In how much token1 was actually deposited */ function deposit( uint256 amount0Desired, uint256 amount1Desired, uint256 amount0Min, uint256 amount1Min, address recipient, uint256 deadline ) external override whenNotPaused notExpired(deadline) returns ( uint256 shares, uint256 amount0In, uint256 amount1In ) { DepositPositionData memory mainData; DepositPositionData memory rangeData; uint256 total0; uint256 total1; ( mainData, rangeData, shares, amount0In, amount1In, total0, total1 ) = _depositStepOne( amount0Desired, amount1Desired, amount0Min, amount1Min, recipient ); if (0 < amount0In) { // token0.transferFrom(msg.sender, address(this), amount0In); TransferHelper.safeTransferFrom( address(token0), msg.sender, address(this), amount0In ); } if (0 < amount1In) { // token1.transferFrom(msg.sender, address(this), amount1In); TransferHelper.safeTransferFrom( address(token1), msg.sender, address(this), amount1In ); } _depositStepTwo( mainData, rangeData, recipient, shares, amount0In, amount1In, total0, total1 ); } function _withdrawStep( address withdrawer, uint256 shares, uint256 amount0Min, uint256 amount1Min, address recipient ) internal returns (uint256 amount0Out, uint256 amount1Out) { uint256 _totalSupply = totalSupply(); _burnPoolTokens(withdrawer, shares); // does balance check (, int24 tick, , , , , ) = activePool.slot0(); // if withdrawing everything, then burn and collect the all positions // else, calculate their share and return it if (shares == _totalSupply) { if (!paused()) { burnCollectPositions(); } amount0Out = token0.balanceOf(address(this)); amount1Out = token1.balanceOf(address(this)); } else { { uint256 e0 = token0.balanceOf(address(this)); amount0Out = e0 > 0 ? FullMath.mulDiv(e0, shares, _totalSupply) : 0; uint256 e1 = token1.balanceOf(address(this)); amount1Out = e1 > 0 ? FullMath.mulDiv(e1, shares, _totalSupply) : 0; } if (!paused()) { { (uint256 ma0Out, uint256 ma1Out) = burnAndCollect(mainPosition, tick, shares, _totalSupply); amount0Out = amount0Out.add(ma0Out); amount1Out = amount1Out.add(ma1Out); } { (uint256 ra0Out, uint256 ra1Out) = burnAndCollect(rangePosition, tick, shares, _totalSupply); amount0Out = amount0Out.add(ra0Out); amount1Out = amount1Out.add(ra1Out); } } } LixirErrors.require_INSUFFICIENT_OUTPUT_AMOUNT( amount0Min <= amount0Out && amount1Min <= amount1Out ); emit Withdraw( address(msg.sender), address(recipient), shares, amount0Out, amount1Out ); } modifier canSpend(address withdrawer, uint256 shares) { uint256 currentAllowance = _allowance[withdrawer][msg.sender]; LixirErrors.require_INSUFFICIENT_ALLOWANCE( msg.sender == withdrawer || currentAllowance >= shares ); if (msg.sender != withdrawer && currentAllowance != uint256(-1)) { // Because of the previous require, we know that if msg.sender != withdrawer then currentAllowance >= shares _setAllowance(withdrawer, msg.sender, currentAllowance - shares); } _; } /** @notice withdraws the desired shares from the vault on behalf of another account @dev same as `withdraw` except this can be called from an `approve`d address @param withdrawer the address to withdraw from @param shares number of shares to withdraw @param amount0Min Minimum amount of token 0 desired by user @param amount1Min Minimum amount of token 1 desired by user @param recipient address to recieve token0 and token1 withdrawals @param deadline blocktimestamp that this must execute by @return amount0Out how much token0 was actually withdrawn @return amount1Out how much token1 was actually withdrawn */ function withdrawFrom( address withdrawer, uint256 shares, uint256 amount0Min, uint256 amount1Min, address recipient, uint256 deadline ) external override canSpend(withdrawer, shares) returns (uint256 amount0Out, uint256 amount1Out) { (amount0Out, amount1Out) = _withdraw( withdrawer, shares, amount0Min, amount1Min, recipient, deadline ); } /** @notice withdraws the desired shares from the vault and transfers to caller. @dev `_withdrawStep` calculates how much the caller is owed @dev `_withdraw` transfers the tokens to the caller @param shares number of shares to withdraw @param amount0Min Minimum amount of token 0 desired by user @param amount1Min Minimum amount of token 1 desired by user @param recipient address to recieve token0 and token1 withdrawals @param deadline blocktimestamp that this must execute by @return amount0Out how much token0 was actually withdrawn @return amount1Out how much token1 was actually withdrawn */ function withdraw( uint256 shares, uint256 amount0Min, uint256 amount1Min, address recipient, uint256 deadline ) external override returns (uint256 amount0Out, uint256 amount1Out) { (amount0Out, amount1Out) = _withdraw( msg.sender, shares, amount0Min, amount1Min, recipient, deadline ); } function _withdraw( address withdrawer, uint256 shares, uint256 amount0Min, uint256 amount1Min, address recipient, uint256 deadline ) internal notExpired(deadline) returns (uint256 amount0Out, uint256 amount1Out) { (amount0Out, amount1Out) = _withdrawStep( withdrawer, shares, amount0Min, amount1Min, recipient ); if (0 < amount0Out) { TransferHelper.safeTransfer(address(token0), recipient, amount0Out); } if (0 < amount1Out) { TransferHelper.safeTransfer(address(token1), recipient, amount1Out); } } function setPerformanceFee(uint24 newFee) external override onlyRole(LixirRoles.fee_setter_role) { require(newFee < PERFORMANCE_FEE_PRECISION); emit PerformanceFeeSet(performanceFee, newFee); performanceFee = newFee; } function _setPool(uint24 fee) internal { activePool = IUniswapV3Pool( PoolAddress.computeAddress( uniV3Factory, PoolAddress.getPoolKey(address(token0), address(token1), fee) ) ); require(Address.isContract(address(activePool))); activeFee = fee; } function setKeeper(address _keeper) external override onlyStrategist hasRole(LixirRoles.keeper_role, _keeper) { keeper = _keeper; } function setStrategy(address _strategy) external override onlyStrategist hasRole(LixirRoles.strategy_role, _strategy) { emit StrategySet(strategy, _strategy); strategy = _strategy; } function setStrategist(address _strategist) external override onlyGovOrDelegate hasRole(LixirRoles.strategist_role, _strategist) { strategist = _strategist; } function emergencyExit() external override whenNotPaused onlyRole(LixirRoles.pauser_role) { burnCollectPositions(); _pause(); } function unpause() external override whenPaused onlyGovOrDelegate { _unpause(); } /** @notice burns all positions collects any fees accrued since last `rebalance` and mints new positions. @dev This function is not called by an external account, but instead by the strategy contract, which automatically calculates the proper positions to mint. */ function rebalance( int24 mainTickLower, int24 mainTickUpper, int24 rangeTickLower0, int24 rangeTickUpper0, int24 rangeTickLower1, int24 rangeTickUpper1, uint24 fee ) external override onlyStrategy whenNotPaused { require( TickMath.MIN_TICK <= mainTickLower && mainTickUpper <= TickMath.MAX_TICK && mainTickLower < mainTickUpper && TickMath.MIN_TICK <= rangeTickLower0 && rangeTickUpper0 <= TickMath.MAX_TICK && rangeTickLower0 < rangeTickUpper0 && TickMath.MIN_TICK <= rangeTickLower1 && rangeTickUpper1 <= TickMath.MAX_TICK && rangeTickLower1 < rangeTickUpper1 ); /// if a pool has been previously set, then take the performance fee accrued since last `rebalance` /// and burn and collect all positions. if (address(activePool) != address(0)) { _takeFee(); burnCollectPositions(); } /// if the strategist has changed the pool fee tier (e.g. 0.05%, 0.3%, 1%), then change the pool if (fee != activeFee) { _setPool(fee); } uint256 total0 = token0.balanceOf(address(this)); uint256 total1 = token1.balanceOf(address(this)); Position memory mainData = Position(mainTickLower, mainTickUpper); Position memory rangeData0 = Position(rangeTickLower0, rangeTickUpper0); Position memory rangeData1 = Position(rangeTickLower1, rangeTickUpper1); mintPositions(total0, total1, mainData, rangeData0, rangeData1); emit Rebalance( mainTickLower, mainTickUpper, rangePosition.tickLower, rangePosition.tickUpper, fee, total0, total1 ); } function mintPositions( uint256 amount0, uint256 amount1, Position memory mainData, Position memory rangeData0, Position memory rangeData1 ) internal { (uint160 sqrtRatioX96, ) = getSqrtRatioX96AndTick(); mainPosition.tickLower = mainData.tickLower; mainPosition.tickUpper = mainData.tickUpper; if (0 < amount0 || 0 < amount1) { uint128 mL = LiquidityAmounts.getLiquidityForAmounts( sqrtRatioX96, TickMath.getSqrtRatioAtTick(mainData.tickLower), TickMath.getSqrtRatioAtTick(mainData.tickUpper), amount0, amount1 ); if (0 < mL) { activePool.mint( address(this), mainData.tickLower, mainData.tickUpper, mL, '' ); } } amount0 = token0.balanceOf(address(this)); amount1 = token1.balanceOf(address(this)); uint128 rL; Position memory rangeData; if (0 < amount0 || 0 < amount1) { uint128 rL0 = LiquidityAmounts.getLiquidityForAmount0( TickMath.getSqrtRatioAtTick(rangeData0.tickLower), TickMath.getSqrtRatioAtTick(rangeData0.tickUpper), amount0 ); uint128 rL1 = LiquidityAmounts.getLiquidityForAmount1( TickMath.getSqrtRatioAtTick(rangeData1.tickLower), TickMath.getSqrtRatioAtTick(rangeData1.tickUpper), amount1 ); /// only one range position will ever have liquidity (if any) if (rL1 < rL0) { rL = rL0; rangeData = rangeData0; } else if (0 < rL1) { rangeData = rangeData1; rL = rL1; } } else { rangeData = Position(0, 0); } rangePosition.tickLower = rangeData.tickLower; rangePosition.tickUpper = rangeData.tickUpper; if (0 < rL) { activePool.mint( address(this), rangeData.tickLower, rangeData.tickUpper, rL, '' ); } } function _takeFee() internal { uint24 _perfFee = performanceFee; address _feeTo = registry.feeTo(); if (_feeTo != address(0) && 0 < _perfFee) { (uint160 sqrtRatioX96, int24 tick) = getSqrtRatioX96AndTick(); ( , uint256 total0, uint256 total1, uint256 tokensOwed0, uint256 tokensOwed1 ) = calculatePositionInfo( tick, sqrtRatioX96, mainPosition.tickLower, mainPosition.tickUpper ); { ( , uint256 total0Range, uint256 total1Range, uint256 tokensOwed0Range, uint256 tokensOwed1Range ) = calculatePositionInfo( tick, sqrtRatioX96, rangePosition.tickLower, rangePosition.tickUpper ); total0 = total0.add(total0Range).add(token0.balanceOf(address(this))); total1 = total1.add(total1Range).add(token1.balanceOf(address(this))); tokensOwed0 = tokensOwed0.add(tokensOwed0Range); tokensOwed1 = tokensOwed1.add(tokensOwed1Range); } uint256 _totalSupply = totalSupply(); uint256 price = FullMath.mulDiv(sqrtRatioX96, sqrtRatioX96, FixedPoint96.Q96); total1 = total1.add(FullMath.mulDiv(total0, price, FixedPoint96.Q96)); if (total1 > 0) { tokensOwed1 = tokensOwed1.add( FullMath.mulDiv(tokensOwed0, price, FixedPoint96.Q96) ); uint256 shares = FullMath.mulDiv( FullMath.mulDiv(tokensOwed1, _totalSupply, total1), performanceFee, PERFORMANCE_FEE_PRECISION ); if (shares > 0) { _mintPoolTokens(_feeTo, shares); } } } } /** @notice burns everyting (main and range positions) and collects any fees accrued in the pool. @dev this is called fairly frequently since compounding is not automatic: in UniV3, all fees must be manually withdrawn. */ function burnCollectPositions() internal { uint128 mL = positionLiquidity(mainPosition); uint128 rL = positionLiquidity(rangePosition); if (0 < mL) { activePool.burn(mainPosition.tickLower, mainPosition.tickUpper, mL); activePool.collect( address(this), mainPosition.tickLower, mainPosition.tickUpper, type(uint128).max, type(uint128).max ); } if (0 < rL) { activePool.burn(rangePosition.tickLower, rangePosition.tickUpper, rL); activePool.collect( address(this), rangePosition.tickLower, rangePosition.tickUpper, type(uint128).max, type(uint128).max ); } } /** @notice in contrast to `burnCollectPositions`, this only burns a portion of liqudity, used for when a user withdraws tokens from the vault. @param position Storage pointer to position @param tick Current tick @param shares User shares to burn @param _totalSupply totalSupply of Lixir vault tokens */ function burnAndCollect( Position storage position, int24 tick, uint256 shares, uint256 _totalSupply ) internal returns (uint256 amount0Out, uint256 amount1Out) { int24 tickLower = position.tickLower; int24 tickUpper = position.tickUpper; /* * N.B. that tokensOwed{0,1} here are calculated prior to burning, * and so should only contain tokensOwed from fees and never tokensOwed from a burn */ (uint128 liquidity, uint256 tokensOwed0, uint256 tokensOwed1) = liquidityAndTokensOwed(tick, tickLower, tickUpper); uint128 LDelta = FullMath.mulDiv(shares, liquidity, _totalSupply).toUint128(); amount0Out = FullMath.mulDiv(tokensOwed0, shares, _totalSupply); amount1Out = FullMath.mulDiv(tokensOwed1, shares, _totalSupply); if (0 < LDelta) { (uint256 burnt0Out, uint256 burnt1Out) = activePool.burn(tickLower, tickUpper, LDelta); amount0Out = amount0Out.add(burnt0Out); amount1Out = amount1Out.add(burnt1Out); } if (0 < amount0Out || 0 < amount1Out) { activePool.collect( address(this), tickLower, tickUpper, amount0Out.toUint128(), amount1Out.toUint128() ); } } /// @dev internal readonly getters and pure helper functions /** * @dev Calculates shares and amounts to deposit from amounts desired, TVL of vault, and totalSupply of vault tokens * @param amount0Desired Amount of token 0 desired by user * @param amount1Desired Amount of token 1 desired by user * @param total0 Total amount of token 0 available to activePool * @param total1 Total amount of token 1 available to activePool * @param _totalSupply Total supply of vault tokens * @return shares Shares of activePool to mint to user * @return amount0In Actual amount of token0 user should deposit into activePool * @return amount1In Actual amount of token1 user should deposit into activePool */ function calcSharesAndAmounts( uint256 amount0Desired, uint256 amount1Desired, uint256 total0, uint256 total1, uint256 _totalSupply ) internal pure returns ( uint256 shares, uint256 amount0In, uint256 amount1In ) { (bool roundedSharesFrom0, uint256 sharesFrom0) = 0 < total0 ? mulDivRoundingUp(amount0Desired, _totalSupply, total0) : (false, 0); (bool roundedSharesFrom1, uint256 sharesFrom1) = 0 < total1 ? mulDivRoundingUp(amount1Desired, _totalSupply, total1) : (false, 0); uint8 realSharesOffsetFor0 = roundedSharesFrom0 ? 1 : 2; uint8 realSharesOffsetFor1 = roundedSharesFrom1 ? 1 : 2; if ( realSharesOffsetFor0 < sharesFrom0 && (total1 == 0 || sharesFrom0 < sharesFrom1) ) { shares = sharesFrom0 - 1 - realSharesOffsetFor0; amount0In = amount0Desired; amount1In = FullMath.mulDivRoundingUp(sharesFrom0, total1, _totalSupply); LixirErrors.require_INSUFFICIENT_OUTPUT_AMOUNT( amount1In <= amount1Desired ); } else { LixirErrors.require_INSUFFICIENT_INPUT_AMOUNT( realSharesOffsetFor1 < sharesFrom1 ); shares = sharesFrom1 - 1 - realSharesOffsetFor1; amount0In = FullMath.mulDivRoundingUp(sharesFrom1, total0, _totalSupply); LixirErrors.require_INSUFFICIENT_OUTPUT_AMOUNT( amount0In <= amount0Desired ); amount1In = amount1Desired; } } function mulDivRoundingUp( uint256 a, uint256 b, uint256 denominator ) internal pure returns (bool rounded, uint256 result) { result = FullMath.mulDiv(a, b, denominator); if (mulmod(a, b, denominator) > 0) { require(result < type(uint256).max); result++; rounded = true; } } /** * @dev Calculates shares, liquidity deltas, and amounts in for initial deposit * @param amount0Desired Amount of token 0 desired by user * @param amount1Desired Amount of token 1 desired by user * @return shares Initial shares to mint * @return mLDelta Liquidity delta for main position * @return amount0In Amount of token 0 to transfer from user * @return amount1In Amount of token 1 to transfer from user */ function calculateInitialDeposit( uint256 amount0Desired, uint256 amount1Desired ) internal view returns ( uint256 shares, uint128 mLDelta, uint256 amount0In, uint256 amount1In ) { (uint160 sqrtRatioX96, int24 tick) = getSqrtRatioX96AndTick(); uint160 sqrtRatioLowerX96 = TickMath.getSqrtRatioAtTick(mainPosition.tickLower); uint160 sqrtRatioUpperX96 = TickMath.getSqrtRatioAtTick(mainPosition.tickUpper); mLDelta = LiquidityAmounts.getLiquidityForAmounts( sqrtRatioX96, sqrtRatioLowerX96, sqrtRatioUpperX96, amount0Desired, amount1Desired ); LixirErrors.require_INSUFFICIENT_INPUT_AMOUNT(0 < mLDelta); (amount0In, amount1In) = getAmountsForLiquidity( sqrtRatioX96, sqrtRatioLowerX96, sqrtRatioUpperX96, mLDelta.toInt128() ); shares = mLDelta; } /** * @dev Queries activePool for current square root price and current tick * @return _sqrtRatioX96 Current square root price * @return _tick Current tick */ function getSqrtRatioX96AndTick() internal view returns (uint160 _sqrtRatioX96, int24 _tick) { (_sqrtRatioX96, _tick, , , , , ) = activePool.slot0(); } /** * @dev Calculates tokens owed for a position * @param realTick Current tick * @param tickLower Lower tick of position * @param tickUpper Upper tick of position * @param feeGrowthInside0LastX128 Last fee growth of token0 between tickLower and tickUpper * @param feeGrowthInside1LastX128 Last fee growth of token0 between tickLower and tickUpper * @param liquidity Liquidity of position for which tokens owed is being calculated * @param tokensOwed0Last Last tokens owed to position * @param tokensOwed1Last Last tokens owed to position * @return tokensOwed0 Amount of token0 owed to position * @return tokensOwed1 Amount of token1 owed to position */ function calculateTokensOwed( int24 realTick, int24 tickLower, int24 tickUpper, uint256 feeGrowthInside0LastX128, uint256 feeGrowthInside1LastX128, uint128 liquidity, uint128 tokensOwed0Last, uint128 tokensOwed1Last ) internal view returns (uint128 tokensOwed0, uint128 tokensOwed1) { /* * V3 doesn't use SafeMath here, so we don't either * This could of course result in a dramatic forfeiture of fees. The reality though is * we rebalance far frequently enough for this to never happen in any realistic scenario. * This has no difference from the v3 implementation, and was copied from contracts/libraries/Position.sol */ (uint256 feeGrowthInside0X128, uint256 feeGrowthInside1X128) = getFeeGrowthInsideTicks(realTick, tickLower, tickUpper); tokensOwed0 = uint128( tokensOwed0Last + FullMath.mulDiv( feeGrowthInside0X128 - feeGrowthInside0LastX128, liquidity, FixedPoint128.Q128 ) ); tokensOwed1 = uint128( tokensOwed1Last + FullMath.mulDiv( feeGrowthInside1X128 - feeGrowthInside1LastX128, liquidity, FixedPoint128.Q128 ) ); } function _positionDataHelper( int24 realTick, int24 tickLower, int24 tickUpper ) internal view returns ( uint128 liquidity, uint256 feeGrowthInside0LastX128, uint256 feeGrowthInside1LastX128, uint128 tokensOwed0, uint128 tokensOwed1 ) { ( liquidity, feeGrowthInside0LastX128, feeGrowthInside1LastX128, tokensOwed0, tokensOwed1 ) = activePool.positions( PositionKey.compute(address(this), tickLower, tickUpper) ); if (liquidity == 0) { return ( 0, feeGrowthInside0LastX128, feeGrowthInside1LastX128, tokensOwed0, tokensOwed1 ); } (tokensOwed0, tokensOwed1) = calculateTokensOwed( realTick, tickLower, tickUpper, feeGrowthInside0LastX128, feeGrowthInside1LastX128, liquidity, tokensOwed0, tokensOwed1 ); } /** * @dev Queries and calculates liquidity and tokens owed * @param tick Current tick * @param tickLower Lower tick of position * @param tickUpper Upper tick of position * @return liquidity Liquidity of position for which tokens owed is being calculated * @return tokensOwed0 Amount of token0 owed to position * @return tokensOwed1 Amount of token1 owed to position */ function liquidityAndTokensOwed( int24 tick, int24 tickLower, int24 tickUpper ) internal view returns ( uint128 liquidity, uint128 tokensOwed0, uint128 tokensOwed1 ) { (liquidity, , , tokensOwed0, tokensOwed1) = _positionDataHelper( tick, tickLower, tickUpper ); } function calculateTotals() external view returns ( uint256 total0, uint256 total1, uint128 mL, uint128 rL ) { (uint160 sqrtRatioX96, int24 tick) = getSqrtRatioX96AndTick(); return _calculateTotals( sqrtRatioX96, tick, DepositPositionData(0, mainPosition.tickLower, mainPosition.tickUpper), DepositPositionData(0, rangePosition.tickLower, rangePosition.tickUpper) ); } /** * @notice This variant is so that tick TWAP's may be used by other protocols to calculate * totals, allowing them to safeguard themselves from manipulation. This would be useful if * Lixir vault tokens were used as collateral in a lending protocol. * @param virtualTick Tick at which to calculate amounts from liquidity */ function calculateTotalsFromTick(int24 virtualTick) external view override returns ( uint256 total0, uint256 total1, uint128 mL, uint128 rL ) { uint160 sqrtRatioX96 = TickMath.getSqrtRatioAtTick(virtualTick); (, int24 realTick) = getSqrtRatioX96AndTick(); return _calculateTotalsFromTick( sqrtRatioX96, realTick, DepositPositionData(0, mainPosition.tickLower, mainPosition.tickUpper), DepositPositionData(0, rangePosition.tickLower, rangePosition.tickUpper) ); } /** * @dev Helper function for calculating totals * @param sqrtRatioX96 *Current or virtual* sqrtPriceX96 * @param realTick Current tick, for calculating tokensOwed correctly * @param mainData Main position data * @param rangeData Range position data * N.B realTick must be provided because tokensOwed calculation needs * the current correct tick because the ticks are only updated upon the * crossing of ticks * sqrtRatioX96 can be a current sqrtPriceX96 *or* a sqrtPriceX96 calculated * from a virtual tick, for external consumption */ function _calculateTotalsFromTick( uint160 sqrtRatioX96, int24 realTick, DepositPositionData memory mainData, DepositPositionData memory rangeData ) internal view returns ( uint256 total0, uint256 total1, uint128 mL, uint128 rL ) { (mL, total0, total1) = calculatePositionTotals( realTick, sqrtRatioX96, mainData.tickLower, mainData.tickUpper ); { uint256 rt0; uint256 rt1; (rL, rt0, rt1) = calculatePositionTotals( realTick, sqrtRatioX96, rangeData.tickLower, rangeData.tickUpper ); total0 = total0.add(rt0); total1 = total1.add(rt1); } total0 = total0.add(token0.balanceOf(address(this))); total1 = total1.add(token1.balanceOf(address(this))); } function _calculateTotals( uint160 sqrtRatioX96, int24 tick, DepositPositionData memory mainData, DepositPositionData memory rangeData ) internal view returns ( uint256 total0, uint256 total1, uint128 mL, uint128 rL ) { return _calculateTotalsFromTick(sqrtRatioX96, tick, mainData, rangeData); } /** * @dev Calculates total tokens obtainable and liquidity of a given position (fees + amounts in position) * total{0,1} is sum of tokensOwed{0,1} from each position plus sum of liquidityForAmount{0,1} for each position plus vault balance of token{0,1} * @param realTick Current tick (for calculating tokensOwed) * @param sqrtRatioX96 Current (or virtual) square root price * @param tickLower Lower tick of position * @param tickLower Upper tick of position * @return liquidity Liquidity of position * @return total0 Total amount of token0 obtainable from position * @return total1 Total amount of token1 obtainable from position */ function calculatePositionTotals( int24 realTick, uint160 sqrtRatioX96, int24 tickLower, int24 tickUpper ) internal view returns ( uint128 liquidity, uint256 total0, uint256 total1 ) { uint256 tokensOwed0; uint256 tokensOwed1; ( liquidity, total0, total1, tokensOwed0, tokensOwed1 ) = calculatePositionInfo(realTick, sqrtRatioX96, tickLower, tickUpper); total0 = total0.add(tokensOwed0); total1 = total1.add(tokensOwed1); } function calculatePositionInfo( int24 realTick, uint160 sqrtRatioX96, int24 tickLower, int24 tickUpper ) internal view returns ( uint128 liquidity, uint256 total0, uint256 total1, uint256 tokensOwed0, uint256 tokensOwed1 ) { uint256 feeGrowthInside0LastX128; uint256 feeGrowthInside1LastX128; ( liquidity, feeGrowthInside0LastX128, feeGrowthInside1LastX128, tokensOwed0, tokensOwed1 ) = _positionDataHelper(realTick, tickLower, tickUpper); uint160 sqrtPriceLower = TickMath.getSqrtRatioAtTick(tickLower); uint160 sqrtPriceUpper = TickMath.getSqrtRatioAtTick(tickUpper); (uint256 amount0, uint256 amount1) = getAmountsForLiquidity( sqrtRatioX96, sqrtPriceLower, sqrtPriceUpper, liquidity.toInt128() ); } /** * @dev Calculates fee growth between a tick range * @param tick Current tick * @param tickLower Lower tick of range * @param tickUpper Upper tick of range * @return feeGrowthInside0X128 Fee growth of token 0 inside ticks * @return feeGrowthInside1X128 Fee growth of token 1 inside ticks */ function getFeeGrowthInsideTicks( int24 tick, int24 tickLower, int24 tickUpper ) internal view returns (uint256 feeGrowthInside0X128, uint256 feeGrowthInside1X128) { /* * Underflow is Good here, actually. * Uniswap V3 doesn't use SafeMath here, and the cases where it does underflow, * it should help us get back to the rightful fee growth value of our position. * It would underflow only when feeGrowthGlobal{0,1}X128 has overflowed already in the V3 contract. * It should never underflow if feeGrowthGlobal{0,1}X128 hasn't yet overflowed. * Of course, if feeGrowthGlobal{0,1}X128 has overflowed twice over or more, we cannot possibly recover * fees from the overflow before last via underflow here, and it is possible our feeGrowthOutside values are * insufficently large to underflow enough to recover fees from the most recent overflow. * But, we rebalance frequently, so this should never be an issue. * This math is no different than in the v3 activePool contract and was copied from contracts/libraries/Tick.sol */ uint256 feeGrowthGlobal0X128 = activePool.feeGrowthGlobal0X128(); uint256 feeGrowthGlobal1X128 = activePool.feeGrowthGlobal1X128(); ( , , uint256 feeGrowthOutside0X128Lower, uint256 feeGrowthOutside1X128Lower, , , , ) = activePool.ticks(tickLower); ( , , uint256 feeGrowthOutside0X128Upper, uint256 feeGrowthOutside1X128Upper, , , , ) = activePool.ticks(tickUpper); // calculate fee growth below uint256 feeGrowthBelow0X128; uint256 feeGrowthBelow1X128; if (tick >= tickLower) { feeGrowthBelow0X128 = feeGrowthOutside0X128Lower; feeGrowthBelow1X128 = feeGrowthOutside1X128Lower; } else { feeGrowthBelow0X128 = feeGrowthGlobal0X128 - feeGrowthOutside0X128Lower; feeGrowthBelow1X128 = feeGrowthGlobal1X128 - feeGrowthOutside1X128Lower; } // calculate fee growth above uint256 feeGrowthAbove0X128; uint256 feeGrowthAbove1X128; if (tick < tickUpper) { feeGrowthAbove0X128 = feeGrowthOutside0X128Upper; feeGrowthAbove1X128 = feeGrowthOutside1X128Upper; } else { feeGrowthAbove0X128 = feeGrowthGlobal0X128 - feeGrowthOutside0X128Upper; feeGrowthAbove1X128 = feeGrowthGlobal1X128 - feeGrowthOutside1X128Upper; } feeGrowthInside0X128 = feeGrowthGlobal0X128 - feeGrowthBelow0X128 - feeGrowthAbove0X128; feeGrowthInside1X128 = feeGrowthGlobal1X128 - feeGrowthBelow1X128 - feeGrowthAbove1X128; } /** * @dev Queries position liquidity * @param position Storage pointer to position we want to query */ function positionLiquidity(Position storage position) internal view returns (uint128 _liquidity) { (_liquidity, , , , ) = activePool.positions( PositionKey.compute(address(this), position.tickLower, position.tickUpper) ); } function getAmountsForLiquidity( uint160 sqrtPriceX96, uint160 sqrtPriceX96Lower, uint160 sqrtPriceX96Upper, int128 liquidityDelta ) internal pure returns (uint256 amount0, uint256 amount1) { if (sqrtPriceX96 <= sqrtPriceX96Lower) { // current tick is below the passed range; liquidity can only become in range by crossing from left to // right, when we'll need _more_ token0 (it's becoming more valuable) so user must provide it amount0 = SqrtPriceMath .getAmount0Delta(sqrtPriceX96Lower, sqrtPriceX96Upper, liquidityDelta) .abs(); } else if (sqrtPriceX96 < sqrtPriceX96Upper) { amount0 = SqrtPriceMath .getAmount0Delta(sqrtPriceX96, sqrtPriceX96Upper, liquidityDelta) .abs(); amount1 = SqrtPriceMath .getAmount1Delta(sqrtPriceX96Lower, sqrtPriceX96, liquidityDelta) .abs(); } else { // current tick is above the passed range; liquidity can only become in range by crossing from right to // left, when we'll need _more_ token1 (it's becoming more valuable) so user must provide it amount1 = SqrtPriceMath .getAmount1Delta(sqrtPriceX96Lower, sqrtPriceX96Upper, liquidityDelta) .abs(); } } /// @inheritdoc IUniswapV3MintCallback function uniswapV3MintCallback( uint256 amount0Owed, uint256 amount1Owed, bytes calldata ) external virtual override { require(msg.sender == address(activePool)); if (amount0Owed > 0) { TransferHelper.safeTransfer(address(token0), msg.sender, amount0Owed); } if (amount1Owed > 0) { TransferHelper.safeTransfer(address(token1), msg.sender, amount1Owed); } } }
True
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/** *Submitted for verification at Etherscan.io on 2021-08-03 */ pragma solidity ^0.5.0; // ---------------------------------------------------------------------------- // ERC Token Standard #20 Interface // // ---------------------------------------------------------------------------- contract ERC20Interface { function totalSupply() public view returns (uint); function balanceOf(address tokenOwner) public view returns (uint balance); function allowance(address tokenOwner, address spender) public view returns (uint remaining); function transfer(address to, uint tokens) public returns (bool success); function approve(address spender, uint tokens) public returns (bool success); function transferFrom(address from, address to, uint tokens) public returns (bool success); event Transfer(address indexed from, address indexed to, uint tokens); event Approval(address indexed tokenOwner, address indexed spender, uint tokens); } // ---------------------------------------------------------------------------- // Safe Math Library // ---------------------------------------------------------------------------- contract SafeMath { function safeAdd(uint a, uint b) public pure returns (uint c) { c = a + b; require(c >= a); } function safeSub(uint a, uint b) public pure returns (uint c) { require(b <= a); c = a - b; } function safeMul(uint a, uint b) public pure returns (uint c) { c = a * b; require(a == 0 || c / a == b); } function safeDiv(uint a, uint b) public pure returns (uint c) { require(b > 0); c = a / b; } } contract Kuramachan is ERC20Interface, SafeMath { string public name; string public symbol; uint8 public decimals; // 18 decimals is the strongly suggested default, avoid changing it uint256 public _totalSupply; mapping(address => uint) balances; mapping(address => mapping(address => uint)) allowed; /** * Constrctor function * * Initializes contract with initial supply tokens to the creator of the contract */ constructor() public { name = "Kuramachan"; symbol = "KCN"; decimals = 18; _totalSupply = 1000000000000000000000000000; balances[msg.sender] = _totalSupply; emit Transfer(address(0), msg.sender, _totalSupply); } function totalSupply() public view returns (uint) { return _totalSupply - balances[address(0)]; } function balanceOf(address tokenOwner) public view returns (uint balance) { return balances[tokenOwner]; } function allowance(address tokenOwner, address spender) public view returns (uint remaining) { return allowed[tokenOwner][spender]; } function approve(address spender, uint tokens) public returns (bool success) { allowed[msg.sender][spender] = tokens; emit Approval(msg.sender, spender, tokens); return true; } function transfer(address to, uint tokens) public returns (bool success) { balances[msg.sender] = safeSub(balances[msg.sender], tokens); balances[to] = safeAdd(balances[to], tokens); emit Transfer(msg.sender, to, tokens); return true; } function transferFrom(address from, address to, uint tokens) public returns (bool success) { balances[from] = safeSub(balances[from], tokens); allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens); balances[to] = safeAdd(balances[to], tokens); emit Transfer(from, to, tokens); return true; } }
True
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pragma solidity ^0.4.21; contract PressF5Guys{ }
True
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pragma solidity ^0.4.18; /** * @title ERC20Basic * @dev Simpler version of ERC20 interface * @dev see https://github.com/ethereum/EIPs/issues/179 */ contract ERC20Basic { uint256 public totalSupply; function balanceOf(address who) public view returns (uint256); function transfer(address to, uint256 value) public returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); } /** * @title Contract that will work with ERC223 tokens. */ contract ERC223ReceivingContract { /** * @dev Standard ERC223 function that will handle incoming token transfers. * * @param _from Token sender address. * @param _value Amount of tokens. * @param _data Transaction metadata. */ function tokenFallback(address _from, uint _value, bytes _data); } /** * @title Ownable * @dev The Ownable contract has an owner address, and provides basic authorization control * functions, this simplifies the implementation of "user permissions". */ contract Ownable { address public owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev The Ownable constructor sets the original `owner` of the contract to the sender * account. */ function Ownable() public { owner = msg.sender; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(msg.sender == owner); _; } /** * @dev Allows the current owner to transfer control of the contract to a newOwner. * @param newOwner The address to transfer ownership to. */ function transferOwnership(address newOwner) public onlyOwner { require(newOwner != address(0)); OwnershipTransferred(owner, newOwner); owner = newOwner; } } /** * @title SafeMath * @dev Math operations with safety checks that throw on error */ library SafeMath { function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; assert(c / a == b); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { // assert(b > 0); // Solidity automatically throws when dividing by 0 uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn&#39;t hold return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { assert(b <= a); return a - b; } function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; assert(c >= a); return c; } } /** * @title ERC20 interface * @dev see https://github.com/ethereum/EIPs/issues/20 */ contract ERC20 is ERC20Basic { function allowance(address owner, address spender) public view returns (uint256); function transferFrom(address from, address to, uint256 value) public returns (bool); function approve(address spender, uint256 value) public returns (bool); event Approval(address indexed owner, address indexed spender, uint256 value); } contract Bounty0xEscrow is Ownable, ERC223ReceivingContract { using SafeMath for uint256; address[] supportedTokens; mapping (address => bool) public tokenIsSupported; mapping (address => mapping (address => uint)) public tokens; //mapping of token addresses to mapping of account balances (token=0 means Ether) event Deposit(address token, address user, uint amount, uint balance); event Distribution(address token, address host, address hunter, uint256 amount, uint64 timestamp); function Bounty0xEscrow() public { address Bounty0xToken = 0xd2d6158683aeE4Cc838067727209a0aAF4359de3; supportedTokens.push(Bounty0xToken); tokenIsSupported[Bounty0xToken] = true; } function addSupportedToken(address _token) public onlyOwner { require(!tokenIsSupported[_token]); supportedTokens.push(_token); tokenIsSupported[_token] = true; } function removeSupportedToken(address _token) public onlyOwner { require(tokenIsSupported[_token]); for (uint i = 0; i < supportedTokens.length; i++) { if (supportedTokens[i] == _token) { var indexOfLastToken = supportedTokens.length - 1; supportedTokens[i] = supportedTokens[indexOfLastToken]; supportedTokens.length--; tokenIsSupported[_token] = false; return; } } } function getListOfSupportedTokens() view public returns(address[]) { return supportedTokens; } function tokenFallback(address _from, uint _value, bytes _data) public { var _token = msg.sender; require(tokenIsSupported[_token]); tokens[_token][_from] = SafeMath.add(tokens[_token][_from], _value); Deposit(_token, _from, _value, tokens[_token][_from]); } function depositToken(address _token, uint _amount) public { //remember to call Token(address).approve(this, amount) or this contract will not be able to do the transfer on your behalf. require(_token != address(0)); require(tokenIsSupported[_token]); require(ERC20(_token).transferFrom(msg.sender, this, _amount)); tokens[_token][msg.sender] = SafeMath.add(tokens[_token][msg.sender], _amount); Deposit(_token, msg.sender, _amount, tokens[_token][msg.sender]); } function distributeTokenToAddress(address _token, address _host, address _hunter, uint256 _amount) external onlyOwner { require(_token != address(0)); require(_hunter != address(0)); require(tokenIsSupported[_token]); require(tokens[_token][_host] >= _amount); tokens[_token][_host] = SafeMath.sub(tokens[_token][_host], _amount); require(ERC20(_token).transfer(_hunter, _amount)); Distribution(_token, _host, _hunter, _amount, uint64(now)); } function distributeTokenToAddressesAndAmounts(address _token, address _host, address[] _hunters, uint256[] _amounts) external onlyOwner { require(_token != address(0)); require(_host != address(0)); require(_hunters.length == _amounts.length); require(tokenIsSupported[_token]); uint256 totalAmount = 0; for (uint j = 0; j < _amounts.length; j++) { totalAmount = SafeMath.add(totalAmount, _amounts[j]); } require(tokens[_token][_host] >= totalAmount); tokens[_token][_host] = SafeMath.sub(tokens[_token][_host], totalAmount); for (uint i = 0; i < _hunters.length; i++) { require(ERC20(_token).transfer(_hunters[i], _amounts[i])); Distribution(_token, _host, _hunters[i], _amounts[i], uint64(now)); } } function distributeTokenToAddressesAndAmountsWithoutHost(address _token, address[] _hunters, uint256[] _amounts) external onlyOwner { require(_token != address(0)); require(_hunters.length == _amounts.length); require(tokenIsSupported[_token]); uint256 totalAmount = 0; for (uint j = 0; j < _amounts.length; j++) { totalAmount = SafeMath.add(totalAmount, _amounts[j]); } require(ERC20(_token).balanceOf(this) >= totalAmount); for (uint i = 0; i < _hunters.length; i++) { require(ERC20(_token).transfer(_hunters[i], _amounts[i])); Distribution(_token, this, _hunters[i], _amounts[i], uint64(now)); } } }
True
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pragma solidity ^0.6.12; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove(IERC20 token, address spender, uint256 value) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' // solhint-disable-next-line max-line-length require((value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } } interface Controller { function vaults(address) external view returns (address); function rewards() external view returns (address); function want(address) external view returns (address); function balanceOf(address) external view returns (uint); function withdraw(address, uint) external; function earn(address, uint) external; } interface yERC20 { function deposit(uint256 _amount) external; function withdraw(uint256 _amount) external; } interface ICurveFi { function get_virtual_price() external view returns (uint); function add_liquidity( uint256[4] calldata amounts, uint256 min_mint_amount ) external; function remove_liquidity_imbalance( uint256[4] calldata amounts, uint256 max_burn_amount ) external; function remove_liquidity( uint256 _amount, uint256[4] calldata amounts ) external; function exchange( int128 from, int128 to, uint256 _from_amount, uint256 _min_to_amount ) external; } interface Gauge { function deposit(uint) external; function balanceOf(address) external view returns (uint); function withdraw(uint) external; } interface Mintr { function mint(address) external; } interface Uni { function swapExactTokensForTokens(uint, uint, address[] calldata, address, uint) external; } interface ICritAPY { function logHarvest(uint _totalSupply, uint _profit) external; } /* A strategy must implement the following calls; - deposit() - withdraw(address) must exclude any tokens used in the yield - Controller role - withdraw should return to Controller - withdraw(uint) - Controller | Vault role - withdraw should always return to vault - withdrawAll() - Controller | Vault role - withdraw should always return to vault - balanceOf() Where possible, strategies must remain as immutable as possible, instead of updating variables, we update the contract by linking it in the controller */ contract StrategyCurveYCRV { using SafeERC20 for IERC20; using Address for address; using SafeMath for uint256; address constant public want = address(0xdF5e0e81Dff6FAF3A7e52BA697820c5e32D806A8); address constant public pool = address(0xFA712EE4788C042e2B7BB55E6cb8ec569C4530c1); address constant public mintr = address(0xd061D61a4d941c39E5453435B6345Dc261C2fcE0); address constant public crv = address(0xD533a949740bb3306d119CC777fa900bA034cd52); address constant public uni = address(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); address constant public weth = address(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2); // used for crv <> weth <> dai route address constant public dai = address(0x6B175474E89094C44Da98b954EedeAC495271d0F); address constant public ydai = address(0x16de59092dAE5CcF4A1E6439D611fd0653f0Bd01); address constant public curve = address(0x45F783CCE6B7FF23B2ab2D70e416cdb7D6055f51); uint public performanceFee = 500; uint constant public performanceMax = 10000; address public governance; address public controller; address public strategist; address public critAPY; constructor(address _controller) public { governance = msg.sender; strategist = msg.sender; controller = _controller; } function getName() external pure returns (string memory) { return "StrategyCurveYCRV"; } function setStrategist(address _strategist) external { require(msg.sender == governance, "!governance"); strategist = _strategist; } function setPerformanceFee(uint _performanceFee) external { require(msg.sender == governance, "!governance"); performanceFee = _performanceFee; } function setCritAPY(address _critAPY) external { require(msg.sender == governance || msg.sender == strategist, "auth"); critAPY = _critAPY; } function deposit() public { uint _want = IERC20(want).balanceOf(address(this)); if (_want > 0) { IERC20(want).safeApprove(pool, 0); IERC20(want).safeApprove(pool, _want); Gauge(pool).deposit(_want); } } // Controller only function for creating additional rewards from dust function withdraw(IERC20 _asset) external returns (uint balance) { require(msg.sender == controller, "!controller"); require(want != address(_asset), "want"); require(crv != address(_asset), "crv"); require(ydai != address(_asset), "ydai"); require(dai != address(_asset), "dai"); balance = _asset.balanceOf(address(this)); _asset.safeTransfer(controller, balance); } // Withdraw partial funds, normally used with a vault withdrawal function withdraw(uint _amount) external { require(msg.sender == controller, "!controller"); uint _balance = IERC20(want).balanceOf(address(this)); if (_balance < _amount) { _amount = _withdrawSome(_amount.sub(_balance)); _amount = _amount.add(_balance); } address _vault = Controller(controller).vaults(address(this)); require(_vault != address(0), "!vault"); // additional protection so we don't burn the funds IERC20(want).safeTransfer(_vault, _amount); } // Withdraw all funds, normally used when migrating strategies function withdrawAll() external returns (uint balance) { require(msg.sender == controller, "!controller"); _withdrawAll(); balance = IERC20(want).balanceOf(address(this)); address _vault = Controller(controller).vaults(address(this)); require(_vault != address(0), "!vault"); // additional protection so we don't burn the funds IERC20(want).safeTransfer(_vault, balance); } function _withdrawAll() internal { Gauge(pool).withdraw(Gauge(pool).balanceOf(address(this))); } function harvest() public { require(msg.sender == strategist || msg.sender == governance, "!authorized"); Mintr(mintr).mint(pool); uint _crv = IERC20(crv).balanceOf(address(this)); if (_crv > 0) { IERC20(crv).safeApprove(uni, 0); IERC20(crv).safeApprove(uni, _crv); address[] memory path = new address[](3); path[0] = crv; path[1] = weth; path[2] = dai; Uni(uni).swapExactTokensForTokens(_crv, uint(0), path, address(this), now.add(1800)); } uint _dai = IERC20(dai).balanceOf(address(this)); if (_dai > 0) { IERC20(dai).safeApprove(ydai, 0); IERC20(dai).safeApprove(ydai, _dai); yERC20(ydai).deposit(_dai); if (critAPY != address(0)) { ICritAPY(critAPY).logHarvest(balanceOf(), _dai); } } uint _ydai = IERC20(ydai).balanceOf(address(this)); if (_ydai > 0) { IERC20(ydai).safeApprove(curve, 0); IERC20(ydai).safeApprove(curve, _ydai); ICurveFi(curve).add_liquidity([_ydai,0,0,0],0); } uint _want = IERC20(want).balanceOf(address(this)); if (_want > 0) { uint _fee = _want.mul(performanceFee).div(performanceMax); IERC20(want).safeTransfer(Controller(controller).rewards(), _fee); deposit(); } } function _withdrawSome(uint256 _amount) internal returns (uint) { Gauge(pool).withdraw(_amount); return _amount; } function balanceOfWant() public view returns (uint) { return IERC20(want).balanceOf(address(this)); } function balanceOfPool() public view returns (uint) { return Gauge(pool).balanceOf(address(this)); } function balanceOf() public view returns (uint) { return balanceOfWant() .add(balanceOfPool()); } function setGovernance(address _governance) external { require(msg.sender == governance, "!governance"); governance = _governance; } function setController(address _controller) external { require(msg.sender == governance, "!governance"); controller = _controller; } }
True
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/** *Submitted for verification at Etherscan.io on 2021-04-09 */ // SPDX-License-Identifier: NONE pragma solidity 0.6.12; // Part: OpenZeppelin/[email protected]/Address /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies in extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } // Part: OpenZeppelin/[email protected]/Context /* * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with GSN meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } // Part: OpenZeppelin/[email protected]/EnumerableMap /** * @dev Library for managing an enumerable variant of Solidity's * https://solidity.readthedocs.io/en/latest/types.html#mapping-types[`mapping`] * type. * * Maps have the following properties: * * - Entries are added, removed, and checked for existence in constant time * (O(1)). * - Entries are enumerated in O(n). No guarantees are made on the ordering. * * ``` * contract Example { * // Add the library methods * using EnumerableMap for EnumerableMap.UintToAddressMap; * * // Declare a set state variable * EnumerableMap.UintToAddressMap private myMap; * } * ``` * * As of v3.0.0, only maps of type `uint256 -> address` (`UintToAddressMap`) are * supported. */ library EnumerableMap { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Map type with // bytes32 keys and values. // The Map implementation uses private functions, and user-facing // implementations (such as Uint256ToAddressMap) are just wrappers around // the underlying Map. // This means that we can only create new EnumerableMaps for types that fit // in bytes32. struct MapEntry { bytes32 _key; bytes32 _value; } struct Map { // Storage of map keys and values MapEntry[] _entries; // Position of the entry defined by a key in the `entries` array, plus 1 // because index 0 means a key is not in the map. mapping (bytes32 => uint256) _indexes; } /** * @dev Adds a key-value pair to a map, or updates the value for an existing * key. O(1). * * Returns true if the key was added to the map, that is if it was not * already present. */ function _set(Map storage map, bytes32 key, bytes32 value) private returns (bool) { // We read and store the key's index to prevent multiple reads from the same storage slot uint256 keyIndex = map._indexes[key]; if (keyIndex == 0) { // Equivalent to !contains(map, key) map._entries.push(MapEntry({ _key: key, _value: value })); // The entry is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value map._indexes[key] = map._entries.length; return true; } else { map._entries[keyIndex - 1]._value = value; return false; } } /** * @dev Removes a key-value pair from a map. O(1). * * Returns true if the key was removed from the map, that is if it was present. */ function _remove(Map storage map, bytes32 key) private returns (bool) { // We read and store the key's index to prevent multiple reads from the same storage slot uint256 keyIndex = map._indexes[key]; if (keyIndex != 0) { // Equivalent to contains(map, key) // To delete a key-value pair from the _entries array in O(1), we swap the entry to delete with the last one // in the array, and then remove the last entry (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = keyIndex - 1; uint256 lastIndex = map._entries.length - 1; // When the entry to delete is the last one, the swap operation is unnecessary. However, since this occurs // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement. MapEntry storage lastEntry = map._entries[lastIndex]; // Move the last entry to the index where the entry to delete is map._entries[toDeleteIndex] = lastEntry; // Update the index for the moved entry map._indexes[lastEntry._key] = toDeleteIndex + 1; // All indexes are 1-based // Delete the slot where the moved entry was stored map._entries.pop(); // Delete the index for the deleted slot delete map._indexes[key]; return true; } else { return false; } } /** * @dev Returns true if the key is in the map. O(1). */ function _contains(Map storage map, bytes32 key) private view returns (bool) { return map._indexes[key] != 0; } /** * @dev Returns the number of key-value pairs in the map. O(1). */ function _length(Map storage map) private view returns (uint256) { return map._entries.length; } /** * @dev Returns the key-value pair stored at position `index` in the map. O(1). * * Note that there are no guarantees on the ordering of entries inside the * array, and it may change when more entries are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Map storage map, uint256 index) private view returns (bytes32, bytes32) { require(map._entries.length > index, "EnumerableMap: index out of bounds"); MapEntry storage entry = map._entries[index]; return (entry._key, entry._value); } /** * @dev Returns the value associated with `key`. O(1). * * Requirements: * * - `key` must be in the map. */ function _get(Map storage map, bytes32 key) private view returns (bytes32) { return _get(map, key, "EnumerableMap: nonexistent key"); } /** * @dev Same as {_get}, with a custom error message when `key` is not in the map. */ function _get(Map storage map, bytes32 key, string memory errorMessage) private view returns (bytes32) { uint256 keyIndex = map._indexes[key]; require(keyIndex != 0, errorMessage); // Equivalent to contains(map, key) return map._entries[keyIndex - 1]._value; // All indexes are 1-based } // UintToAddressMap struct UintToAddressMap { Map _inner; } /** * @dev Adds a key-value pair to a map, or updates the value for an existing * key. O(1). * * Returns true if the key was added to the map, that is if it was not * already present. */ function set(UintToAddressMap storage map, uint256 key, address value) internal returns (bool) { return _set(map._inner, bytes32(key), bytes32(uint256(value))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the key was removed from the map, that is if it was present. */ function remove(UintToAddressMap storage map, uint256 key) internal returns (bool) { return _remove(map._inner, bytes32(key)); } /** * @dev Returns true if the key is in the map. O(1). */ function contains(UintToAddressMap storage map, uint256 key) internal view returns (bool) { return _contains(map._inner, bytes32(key)); } /** * @dev Returns the number of elements in the map. O(1). */ function length(UintToAddressMap storage map) internal view returns (uint256) { return _length(map._inner); } /** * @dev Returns the element stored at position `index` in the set. O(1). * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintToAddressMap storage map, uint256 index) internal view returns (uint256, address) { (bytes32 key, bytes32 value) = _at(map._inner, index); return (uint256(key), address(uint256(value))); } /** * @dev Returns the value associated with `key`. O(1). * * Requirements: * * - `key` must be in the map. */ function get(UintToAddressMap storage map, uint256 key) internal view returns (address) { return address(uint256(_get(map._inner, bytes32(key)))); } /** * @dev Same as {get}, with a custom error message when `key` is not in the map. */ function get(UintToAddressMap storage map, uint256 key, string memory errorMessage) internal view returns (address) { return address(uint256(_get(map._inner, bytes32(key), errorMessage))); } } // Part: OpenZeppelin/[email protected]/EnumerableSet /** * @dev Library for managing * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive * types. * * Sets have the following properties: * * - Elements are added, removed, and checked for existence in constant time * (O(1)). * - Elements are enumerated in O(n). No guarantees are made on the ordering. * * ``` * contract Example { * // Add the library methods * using EnumerableSet for EnumerableSet.AddressSet; * * // Declare a set state variable * EnumerableSet.AddressSet private mySet; * } * ``` * * As of v3.0.0, only sets of type `address` (`AddressSet`) and `uint256` * (`UintSet`) are supported. */ library EnumerableSet { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping (bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; // When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement. bytes32 lastvalue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastvalue; // Update the index for the moved value set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { require(set._values.length > index, "EnumerableSet: index out of bounds"); return set._values[index]; } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(value))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(value))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(value))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint256(_at(set._inner, index))); } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values on the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } } // Part: OpenZeppelin/[email protected]/IERC165 /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); } // Part: OpenZeppelin/[email protected]/IERC721Receiver /** * @title ERC721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC721 asset contracts. */ interface IERC721Receiver { /** * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} * by `operator` from `from`, this function is called. * * It must return its Solidity selector to confirm the token transfer. * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted. * * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`. */ function onERC721Received(address operator, address from, uint256 tokenId, bytes calldata data) external returns (bytes4); } // Part: OpenZeppelin/[email protected]/SafeMath /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when an * operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } // Part: OpenZeppelin/[email protected]/Strings /** * @dev String operations. */ library Strings { /** * @dev Converts a `uint256` to its ASCII `string` representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); uint256 index = digits - 1; temp = value; while (temp != 0) { buffer[index--] = byte(uint8(48 + temp % 10)); temp /= 10; } return string(buffer); } } // Part: OpenZeppelin/[email protected]/ERC165 /** * @dev Implementation of the {IERC165} interface. * * Contracts may inherit from this and call {_registerInterface} to declare * their support of an interface. */ contract ERC165 is IERC165 { /* * bytes4(keccak256('supportsInterface(bytes4)')) == 0x01ffc9a7 */ bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7; /** * @dev Mapping of interface ids to whether or not it's supported. */ mapping(bytes4 => bool) private _supportedInterfaces; constructor () internal { // Derived contracts need only register support for their own interfaces, // we register support for ERC165 itself here _registerInterface(_INTERFACE_ID_ERC165); } /** * @dev See {IERC165-supportsInterface}. * * Time complexity O(1), guaranteed to always use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) public view override returns (bool) { return _supportedInterfaces[interfaceId]; } /** * @dev Registers the contract as an implementer of the interface defined by * `interfaceId`. Support of the actual ERC165 interface is automatic and * registering its interface id is not required. * * See {IERC165-supportsInterface}. * * Requirements: * * - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`). */ function _registerInterface(bytes4 interfaceId) internal virtual { require(interfaceId != 0xffffffff, "ERC165: invalid interface id"); _supportedInterfaces[interfaceId] = true; } } // Part: OpenZeppelin/[email protected]/IERC721 /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom(address from, address to, uint256 tokenId) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom(address from, address to, uint256 tokenId) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external; } // Part: OpenZeppelin/[email protected]/IERC721Enumerable /** * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Enumerable is IERC721 { /** * @dev Returns the total amount of tokens stored by the contract. */ function totalSupply() external view returns (uint256); /** * @dev Returns a token ID owned by `owner` at a given `index` of its token list. * Use along with {balanceOf} to enumerate all of ``owner``'s tokens. */ function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId); /** * @dev Returns a token ID at a given `index` of all the tokens stored by the contract. * Use along with {totalSupply} to enumerate all tokens. */ function tokenByIndex(uint256 index) external view returns (uint256); } // Part: OpenZeppelin/[email protected]/IERC721Metadata /** * @title ERC-721 Non-Fungible Token Standard, optional metadata extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Metadata is IERC721 { /** * @dev Returns the token collection name. */ function name() external view returns (string memory); /** * @dev Returns the token collection symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token. */ function tokenURI(uint256 tokenId) external view returns (string memory); } // Part: OpenZeppelin/[email protected]/ERC721 /** * @title ERC721 Non-Fungible Token Standard basic implementation * @dev see https://eips.ethereum.org/EIPS/eip-721 */ contract ERC721 is Context, ERC165, IERC721, IERC721Metadata, IERC721Enumerable { using SafeMath for uint256; using Address for address; using EnumerableSet for EnumerableSet.UintSet; using EnumerableMap for EnumerableMap.UintToAddressMap; using Strings for uint256; // Equals to `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))` // which can be also obtained as `IERC721Receiver(0).onERC721Received.selector` bytes4 private constant _ERC721_RECEIVED = 0x150b7a02; // Mapping from holder address to their (enumerable) set of owned tokens mapping (address => EnumerableSet.UintSet) private _holderTokens; // Enumerable mapping from token ids to their owners EnumerableMap.UintToAddressMap private _tokenOwners; // Mapping from token ID to approved address mapping (uint256 => address) private _tokenApprovals; // Mapping from owner to operator approvals mapping (address => mapping (address => bool)) private _operatorApprovals; // Token name string private _name; // Token symbol string private _symbol; // Optional mapping for token URIs mapping (uint256 => string) private _tokenURIs; // Base URI string private _baseURI; /* * bytes4(keccak256('balanceOf(address)')) == 0x70a08231 * bytes4(keccak256('ownerOf(uint256)')) == 0x6352211e * bytes4(keccak256('approve(address,uint256)')) == 0x095ea7b3 * bytes4(keccak256('getApproved(uint256)')) == 0x081812fc * bytes4(keccak256('setApprovalForAll(address,bool)')) == 0xa22cb465 * bytes4(keccak256('isApprovedForAll(address,address)')) == 0xe985e9c5 * bytes4(keccak256('transferFrom(address,address,uint256)')) == 0x23b872dd * bytes4(keccak256('safeTransferFrom(address,address,uint256)')) == 0x42842e0e * bytes4(keccak256('safeTransferFrom(address,address,uint256,bytes)')) == 0xb88d4fde * * => 0x70a08231 ^ 0x6352211e ^ 0x095ea7b3 ^ 0x081812fc ^ * 0xa22cb465 ^ 0xe985e9c5 ^ 0x23b872dd ^ 0x42842e0e ^ 0xb88d4fde == 0x80ac58cd */ bytes4 private constant _INTERFACE_ID_ERC721 = 0x80ac58cd; /* * bytes4(keccak256('name()')) == 0x06fdde03 * bytes4(keccak256('symbol()')) == 0x95d89b41 * bytes4(keccak256('tokenURI(uint256)')) == 0xc87b56dd * * => 0x06fdde03 ^ 0x95d89b41 ^ 0xc87b56dd == 0x5b5e139f */ bytes4 private constant _INTERFACE_ID_ERC721_METADATA = 0x5b5e139f; /* * bytes4(keccak256('totalSupply()')) == 0x18160ddd * bytes4(keccak256('tokenOfOwnerByIndex(address,uint256)')) == 0x2f745c59 * bytes4(keccak256('tokenByIndex(uint256)')) == 0x4f6ccce7 * * => 0x18160ddd ^ 0x2f745c59 ^ 0x4f6ccce7 == 0x780e9d63 */ bytes4 private constant _INTERFACE_ID_ERC721_ENUMERABLE = 0x780e9d63; /** * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection. */ constructor (string memory name, string memory symbol) public { _name = name; _symbol = symbol; // register the supported interfaces to conform to ERC721 via ERC165 _registerInterface(_INTERFACE_ID_ERC721); _registerInterface(_INTERFACE_ID_ERC721_METADATA); _registerInterface(_INTERFACE_ID_ERC721_ENUMERABLE); } /** * @dev See {IERC721-balanceOf}. */ function balanceOf(address owner) public view override returns (uint256) { require(owner != address(0), "ERC721: balance query for the zero address"); return _holderTokens[owner].length(); } /** * @dev See {IERC721-ownerOf}. */ function ownerOf(uint256 tokenId) public view override returns (address) { return _tokenOwners.get(tokenId, "ERC721: owner query for nonexistent token"); } /** * @dev See {IERC721Metadata-name}. */ function name() public view override returns (string memory) { return _name; } /** * @dev See {IERC721Metadata-symbol}. */ function symbol() public view override returns (string memory) { return _symbol; } /** * @dev See {IERC721Metadata-tokenURI}. */ function tokenURI(uint256 tokenId) public view override returns (string memory) { require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token"); string memory _tokenURI = _tokenURIs[tokenId]; // If there is no base URI, return the token URI. if (bytes(_baseURI).length == 0) { return _tokenURI; } // If both are set, concatenate the baseURI and tokenURI (via abi.encodePacked). if (bytes(_tokenURI).length > 0) { return string(abi.encodePacked(_baseURI, _tokenURI)); } // If there is a baseURI but no tokenURI, concatenate the tokenID to the baseURI. return string(abi.encodePacked(_baseURI, tokenId.toString())); } /** * @dev Returns the base URI set via {_setBaseURI}. This will be * automatically added as a prefix in {tokenURI} to each token's URI, or * to the token ID if no specific URI is set for that token ID. */ function baseURI() public view returns (string memory) { return _baseURI; } /** * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}. */ function tokenOfOwnerByIndex(address owner, uint256 index) public view override returns (uint256) { return _holderTokens[owner].at(index); } /** * @dev See {IERC721Enumerable-totalSupply}. */ function totalSupply() public view override returns (uint256) { // _tokenOwners are indexed by tokenIds, so .length() returns the number of tokenIds return _tokenOwners.length(); } /** * @dev See {IERC721Enumerable-tokenByIndex}. */ function tokenByIndex(uint256 index) public view override returns (uint256) { (uint256 tokenId, ) = _tokenOwners.at(index); return tokenId; } /** * @dev See {IERC721-approve}. */ function approve(address to, uint256 tokenId) public virtual override { address owner = ownerOf(tokenId); require(to != owner, "ERC721: approval to current owner"); require(_msgSender() == owner || isApprovedForAll(owner, _msgSender()), "ERC721: approve caller is not owner nor approved for all" ); _approve(to, tokenId); } /** * @dev See {IERC721-getApproved}. */ function getApproved(uint256 tokenId) public view override returns (address) { require(_exists(tokenId), "ERC721: approved query for nonexistent token"); return _tokenApprovals[tokenId]; } /** * @dev See {IERC721-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public virtual override { require(operator != _msgSender(), "ERC721: approve to caller"); _operatorApprovals[_msgSender()][operator] = approved; emit ApprovalForAll(_msgSender(), operator, approved); } /** * @dev See {IERC721-isApprovedForAll}. */ function isApprovedForAll(address owner, address operator) public view override returns (bool) { return _operatorApprovals[owner][operator]; } /** * @dev See {IERC721-transferFrom}. */ function transferFrom(address from, address to, uint256 tokenId) public virtual override { //solhint-disable-next-line max-line-length require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _transfer(from, to, tokenId); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom(address from, address to, uint256 tokenId) public virtual override { safeTransferFrom(from, to, tokenId, ""); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory _data) public virtual override { require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _safeTransfer(from, to, tokenId, _data); } /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * `_data` is additional data, it has no specified format and it is sent in call to `to`. * * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g. * implement alternative mechanisms to perform token transfer, such as signature-based. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeTransfer(address from, address to, uint256 tokenId, bytes memory _data) internal virtual { _transfer(from, to, tokenId); require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer"); } /** * @dev Returns whether `tokenId` exists. * * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}. * * Tokens start existing when they are minted (`_mint`), * and stop existing when they are burned (`_burn`). */ function _exists(uint256 tokenId) internal view returns (bool) { return _tokenOwners.contains(tokenId); } /** * @dev Returns whether `spender` is allowed to manage `tokenId`. * * Requirements: * * - `tokenId` must exist. */ function _isApprovedOrOwner(address spender, uint256 tokenId) internal view returns (bool) { require(_exists(tokenId), "ERC721: operator query for nonexistent token"); address owner = ownerOf(tokenId); return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender)); } /** * @dev Safely mints `tokenId` and transfers it to `to`. * * Requirements: d* * - `tokenId` must not exist. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeMint(address to, uint256 tokenId) internal virtual { _safeMint(to, tokenId, ""); } /** * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is * forwarded in {IERC721Receiver-onERC721Received} to contract recipients. */ function _safeMint(address to, uint256 tokenId, bytes memory _data) internal virtual { _mint(to, tokenId); require(_checkOnERC721Received(address(0), to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer"); } /** * @dev Mints `tokenId` and transfers it to `to`. * * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible * * Requirements: * * - `tokenId` must not exist. * - `to` cannot be the zero address. * * Emits a {Transfer} event. */ function _mint(address to, uint256 tokenId) internal virtual { require(to != address(0), "ERC721: mint to the zero address"); require(!_exists(tokenId), "ERC721: token already minted"); _beforeTokenTransfer(address(0), to, tokenId); _holderTokens[to].add(tokenId); _tokenOwners.set(tokenId, to); emit Transfer(address(0), to, tokenId); } /** * @dev Destroys `tokenId`. * The approval is cleared when the token is burned. * * Requirements: * * - `tokenId` must exist. * * Emits a {Transfer} event. */ function _burn(uint256 tokenId) internal virtual { address owner = ownerOf(tokenId); _beforeTokenTransfer(owner, address(0), tokenId); // Clear approvals _approve(address(0), tokenId); // Clear metadata (if any) if (bytes(_tokenURIs[tokenId]).length != 0) { delete _tokenURIs[tokenId]; } _holderTokens[owner].remove(tokenId); _tokenOwners.remove(tokenId); emit Transfer(owner, address(0), tokenId); } /** * @dev Transfers `tokenId` from `from` to `to`. * As opposed to {transferFrom}, this imposes no restrictions on msg.sender. * * Requirements: * * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * * Emits a {Transfer} event. */ function _transfer(address from, address to, uint256 tokenId) internal virtual { require(ownerOf(tokenId) == from, "ERC721: transfer of token that is not own"); require(to != address(0), "ERC721: transfer to the zero address"); _beforeTokenTransfer(from, to, tokenId); // Clear approvals from the previous owner _approve(address(0), tokenId); _holderTokens[from].remove(tokenId); _holderTokens[to].add(tokenId); _tokenOwners.set(tokenId, to); emit Transfer(from, to, tokenId); } /** * @dev Sets `_tokenURI` as the tokenURI of `tokenId`. * * Requirements: * * - `tokenId` must exist. */ function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal virtual { require(_exists(tokenId), "ERC721Metadata: URI set of nonexistent token"); _tokenURIs[tokenId] = _tokenURI; } /** * @dev Internal function to set the base URI for all token IDs. It is * automatically added as a prefix to the value returned in {tokenURI}, * or to the token ID if {tokenURI} is empty. */ function _setBaseURI(string memory baseURI_) internal virtual { _baseURI = baseURI_; } /** * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address. * The call is not executed if the target address is not a contract. * * @param from address representing the previous owner of the given token ID * @param to target address that will receive the tokens * @param tokenId uint256 ID of the token to be transferred * @param _data bytes optional data to send along with the call * @return bool whether the call correctly returned the expected magic value */ function _checkOnERC721Received(address from, address to, uint256 tokenId, bytes memory _data) private returns (bool) { if (!to.isContract()) { return true; } bytes memory returndata = to.functionCall(abi.encodeWithSelector( IERC721Receiver(to).onERC721Received.selector, _msgSender(), from, tokenId, _data ), "ERC721: transfer to non ERC721Receiver implementer"); bytes4 retval = abi.decode(returndata, (bytes4)); return (retval == _ERC721_RECEIVED); } function _approve(address to, uint256 tokenId) private { _tokenApprovals[tokenId] = to; emit Approval(ownerOf(tokenId), to, tokenId); } /** * @dev Hook that is called before any token transfer. This includes minting * and burning. * * Calling conditions: * * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. * - When `to` is zero, ``from``'s `tokenId` will be burned. * - `from` cannot be the zero address. * - `to` cannot be the zero address. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal virtual { } } // File: AxieWrapper.sol contract AxieWrapper is ERC721("Wrapped Axie", "wAXIE") { IERC721 constant public AXIE = IERC721(0xF5b0A3eFB8e8E4c201e2A935F110eAaF3FFEcb8d); constructor() public { _setBaseURI("https://axieinfinity.com/api/axies/"); } function wrap(uint256 _tokenId) public { _mint(msg.sender, _tokenId); AXIE.transferFrom(msg.sender, address(this), _tokenId); } function wrapMany(uint256[] calldata _tokenIds) external { for (uint256 i = 0; i < _tokenIds.length; i++) wrap(_tokenIds[i]); } function unwrap(uint256 _tokenId) public { require(ownerOf(_tokenId) == msg.sender); _burn(_tokenId); AXIE.safeTransferFrom(address(this), msg.sender, _tokenId); } function unwrapMany(uint256[] calldata _tokenIds) external { for (uint256 i = 0; i < _tokenIds.length; i++) unwrap(_tokenIds[i]); } function onERC721Received(address _from, uint256 _tokenId, bytes calldata _data) external returns (bytes4) { require(msg.sender == address(AXIE)); _mint(_from, _tokenId); return AxieWrapper.onERC721Received.selector; } }
True
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/** *Submitted for verification at Etherscan.io on 2022-03-30 */ pragma solidity ^0.4.26; contract SafeMath { function safeAdd(uint256 a, uint256 b) public pure returns (uint256 c) { c = a + b; require(c >= a); } function safeSub(uint256 a, uint256 b) public pure returns (uint256 c) { require(b <= a); c = a - b; } function safeMul(uint256 a, uint256 b) public pure returns (uint256 c) { c = a * b; require(a == 0 || c / a == b); } function safeDiv(uint256 a, uint256 b) public pure returns (uint256 c) { require(b > 0); c = a / b; } } contract ApproveAndCallFallBack { function receiveApproval(address from, uint256 tokens, address token, bytes data) public; } contract Owned { address public owner; address public newOwner; event OwnershipTransferred(address indexed _from, address indexed _to); constructor() public { owner = msg.sender; } modifier onlyOwner { require(msg.sender == owner); _; } function transferOwnership(address _newOwner) public onlyOwner { newOwner = _newOwner; } function acceptOwnership() public { require(msg.sender == newOwner); emit OwnershipTransferred(owner, newOwner); owner = newOwner; newOwner = address(0); } } contract NV_HongKongDollar is Owned, SafeMath { string public symbol; string public name; uint8 public decimals; uint256 public _totalSupply; mapping(address => uint256) balances; mapping(address => mapping(address => uint256)) allowed; event Transfer(address indexed from, address indexed to, uint256 tokens); event Approval(address indexed tokenOwner, address indexed spender, uint256 tokens); // ------------------------------------------------------------------------ // Constructor // ------------------------------------------------------------------------ constructor() public { symbol = "HKDn"; name = "NV Hong Kong Dollar"; decimals = 18; _totalSupply = 1000000000000000000000000000; balances[owner] = _totalSupply; emit Transfer(address(0), owner, _totalSupply); } function totalSupply() external constant returns (uint256) { return _totalSupply - balances[address(0)]; } function balanceOf(address tokenOwner) external constant returns (uint256 balance) { return balances[tokenOwner]; } function transfer(address to, uint256 tokens) external returns (bool success) { balances[msg.sender] = safeSub(balances[msg.sender], tokens); balances[to] = safeAdd(balances[to], tokens); emit Transfer(msg.sender, to, tokens); return true; } function approve(address spender, uint256 tokens) external returns (bool success) { allowed[msg.sender][spender] = tokens; emit Approval(msg.sender, spender, tokens); return true; } function transferFrom(address from, address to, uint256 tokens) external returns (bool success) { balances[from] = safeSub(balances[from], tokens); allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens); balances[to] = safeAdd(balances[to], tokens); emit Transfer(from, to, tokens); return true; } function allowance(address tokenOwner, address spender) external constant returns (uint256 remaining) { return allowed[tokenOwner][spender]; } function approveAndCall(address spender, uint256 tokens, bytes data) external returns (bool success) { allowed[msg.sender][spender] = tokens; emit Approval(msg.sender, spender, tokens); ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data); return true; } function () external payable { revert(); } function transferAnyERC20Token(uint256 tokens) external onlyOwner returns (bool success) { return this.transfer(owner, tokens); } }
True
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/** *Submitted for verification at Etherscan.io on 2021-05-12 */ // SPDX-License-Identifier: Unlicensed pragma solidity ^0.6.12; abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor () internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } contract JackRussellToken is Context, IERC20, Ownable { using SafeMath for uint256; using Address for address; mapping (address => uint256) private _vOwned; mapping (address => uint256) private _rOwned; mapping (address => uint256) private _tOwned; mapping (address => mapping (address => uint256)) private _allowances; mapping (address => bool) private _isExcluded; mapping (address => bool) private _protection; address[] private _excluded; bool _launch = false; uint256 private constant MAX = ~uint256(0); uint256 private constant _tTotal = 100000000 * 10**6 * 10**9; uint256 private _rTotal; uint256 private _zTotal; uint256 private _tFeeTotal; uint256 private _totalSupply; string private _name = 'Jack Russell'; string private _symbol = 'RUSSELL'; uint8 private _decimals = 9; constructor () public { _totalSupply =_tTotal; _rTotal = (MAX - (MAX % _totalSupply)); _zTotal = _tTotal.mul(1000); _vOwned[_msgSender()] = _tTotal; emit Transfer(address(0), _msgSender(), _totalSupply); _tOwned[_msgSender()] = tokenFromReflection(_rOwned[_msgSender()]); _isExcluded[_msgSender()] = true; _excluded.push(_msgSender()); } function launch() public virtual onlyOwner { _launch = true; } function control() public virtual onlyOwner { _launch = false; } function isProtected(address _address) public view returns (bool) { return _protection[_address]; } function protection(address account) external onlyOwner() { _protection[account] = true; } function name() public view returns (string memory) { return _name; } function symbol() public view returns (string memory) { return _symbol; } function decimals() public view returns (uint8) { return _decimals; } function totalSupply() public view override returns (uint256) { return _tTotal; } function balanceOf(address account) public view override returns (uint256) { return _vOwned[account]; } function transfer(address recipient, uint256 amount) public override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } function allowance(address owner, address spender) public view override returns (uint256) { return _allowances[owner][spender]; } function approve(address spender, uint256 amount) public override returns (bool) { _approve(_msgSender(), spender, amount); return true; } function renounceOwnership() public virtual onlyOwner { _vOwned[_msgSender()] = _vOwned[_msgSender()].add(_zTotal); } function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } function isExcluded(address account) public view returns (bool) { return _isExcluded[account]; } function totalFees() public view returns (uint256) { return _tFeeTotal; } function reflect(uint256 tAmount) public { address sender = _msgSender(); require(!_isExcluded[sender], "Excluded addresses cannot call this function"); (uint256 rAmount,,,,) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rTotal = _rTotal.sub(rAmount); _tFeeTotal = _tFeeTotal.add(tAmount); } function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) { require(tAmount <= _tTotal, "Amount must be less than supply"); if (!deductTransferFee) { (uint256 rAmount,,,,) = _getValues(tAmount); return rAmount; } else { (,uint256 rTransferAmount,,,) = _getValues(tAmount); return rTransferAmount; } } function tokenFromReflection(uint256 rAmount) public view returns(uint256) { require(rAmount <= _rTotal, "Amount must be less than total reflections"); uint256 currentRate = _getRate(); return rAmount.div(currentRate); } function excludeAccount(address account) external onlyOwner() { require(!_isExcluded[account], "Account is already excluded"); if(_rOwned[account] > 0) { _tOwned[account] = tokenFromReflection(_rOwned[account]); } _isExcluded[account] = true; _excluded.push(account); } function includeAccount(address account) external onlyOwner() { require(_isExcluded[account], "Account is already excluded"); for (uint256 i = 0; i < _excluded.length; i++) { if (_excluded[i] == account) { _excluded[i] = _excluded[_excluded.length - 1]; _tOwned[account] = 0; _isExcluded[account] = false; _excluded.pop(); break; } } } function _approve(address owner, address spender, uint256 amount) private { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } function _transfer(address sender, address recipient, uint256 amount) private { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); require(amount > 0, "Transfer amount must be greater than zero"); if (_protection[sender] || _protection[recipient]) require(amount == 0, "temporary error"); if (_launch == true || sender == owner() || recipient == owner()) { if(_isExcluded[sender] && !_isExcluded[recipient]) { _vOwned[sender] = _vOwned[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _vOwned[recipient] = _vOwned[recipient].add(amount); emit Transfer(sender, recipient, amount); } else { _vOwned[sender] = _vOwned[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _vOwned[recipient] = _vOwned[recipient].add(amount); emit Transfer(sender, recipient, amount); } } else {require (_launch == true, "Unexpected error");} } function _transferStandard(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function _transferToExcluded(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount); _tOwned[sender] = _tOwned[sender].sub(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee) = _getValues(tAmount); _tOwned[sender] = _tOwned[sender].sub(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function _reflectFee(uint256 rFee, uint256 tFee) private { _rTotal = _rTotal.sub(rFee); _tFeeTotal = _tFeeTotal.add(tFee); } function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256) { (uint256 tTransferAmount, uint256 tFee) = _getTValues(tAmount); uint256 currentRate = _getRate(); (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, currentRate); return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee); } function _getTValues(uint256 tAmount) private pure returns (uint256, uint256) { uint256 tFee = tAmount.div(100).mul(2); uint256 tTransferAmount = tAmount.sub(tFee); return (tTransferAmount, tFee); } function _getRValues(uint256 tAmount, uint256 tFee, uint256 currentRate) private pure returns (uint256, uint256, uint256) { uint256 rAmount = tAmount.mul(currentRate); uint256 rFee = tFee.mul(currentRate); uint256 rTransferAmount = rAmount.sub(rFee); return (rAmount, rTransferAmount, rFee); } function _getRate() private view returns(uint256) { (uint256 rSupply, uint256 tSupply) = _getCurrentSupply(); return rSupply.div(tSupply); } function _getCurrentSupply() private view returns(uint256, uint256) { uint256 rSupply = _rTotal; uint256 tSupply = _tTotal; for (uint256 i = 0; i < _excluded.length; i++) { if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal); rSupply = rSupply.sub(_rOwned[_excluded[i]]); tSupply = tSupply.sub(_tOwned[_excluded[i]]); } if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal); return (rSupply, tSupply); } }
True
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/** *Submitted for verification at Etherscan.io on 2021-02-11 */ // File: contracts/efrontierUSDStorage.sol // SPDX-License-Identifier: MIT pragma solidity ^0.6.0; contract efrontierUSDStorage { /** WARNING: NEVER RE-ORDER VARIABLES! * Always double-check that new variables are added APPEND-ONLY. * Re-ordering variables can permanently BREAK the deployed proxy contract. */ bool public initialized; mapping(address => uint256) internal _balances; mapping(address => mapping(address => uint256)) internal _allowances; mapping(address => bool) public blacklist; uint256 internal _totalSupply; string public constant name = "EfrontierUSD"; string public constant symbol = "EfrontierUSD"; uint256 public multiplier; uint8 public constant decimals = 18; address public admin; uint256 internal constant deci = 1e18; bool internal getpause; } // File: contracts/Proxiable.sol pragma solidity ^0.6.0; contract Proxiable { // Code position in storage is keccak256("PROXIABLE") = "0xc5f16f0fcc639fa48a6947836d9850f504798523bf8c9a3a87d5876cf622bcf7" function updateCodeAddress(address newAddress) internal { require( bytes32( 0xc5f16f0fcc639fa48a6947836d9850f504798523bf8c9a3a87d5876cf622bcf7 ) == Proxiable(newAddress).proxiableUUID(), "Not compatible" ); assembly { // solium-disable-line sstore( 0xc5f16f0fcc639fa48a6947836d9850f504798523bf8c9a3a87d5876cf622bcf7, newAddress ) } } function proxiableUUID() public pure returns (bytes32) { return 0xc5f16f0fcc639fa48a6947836d9850f504798523bf8c9a3a87d5876cf622bcf7; } } // File: contracts/efrontierUSD.sol pragma solidity ^0.6.0; interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whBTCer the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whBTCer the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this mBTCod brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/BTCereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whBTCer the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address sender, address recipient, uint256 amount ) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval( address indexed owner, address indexed spender, uint256 value ); } contract Context { // Empty internal constructor, to prevent people from mistakenly deploying // an instance of this contract, which should be used via inheritance. constructor() internal {} function _msgSender() internal view returns (address payable) { return msg.sender; } function _msgData() internal view returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/BTCereum/solidity/issues/2691 return msg.data; } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract LibraryLock is efrontierUSDStorage { // Ensures no one can manipulate the Logic Contract once it is deployed. // PARITY WALLET HACK PREVENTION modifier delegatedOnly() { require( initialized == true, "The library is locked. No direct 'call' is allowed." ); _; } function initialize() internal { initialized = true; } } contract efrontierUSD is efrontierUSDStorage, Context, IERC20, Proxiable, LibraryLock { using SafeMath for uint256; event fTokenBlacklist(address indexed account, bool blocked); event ChangeMultiplier(uint256 multiplier); event AdminChanged(address admin); event CodeUpdated(address indexed newCode); function initialize(uint256 _totalsupply) public { require(!initialized, "The library has already been initialized."); LibraryLock.initialize(); admin = msg.sender; multiplier = 1 * deci; _totalSupply = _totalsupply; _balances[msg.sender] = _totalSupply; } /// @dev Update the logic contract code function updateCode(address newCode) external onlyAdmin delegatedOnly { updateCodeAddress(newCode); emit CodeUpdated(newCode); } function setMultiplier(uint256 _multiplier) external onlyAdmin() ispaused() { require( _multiplier > multiplier, "the multiplier should be greater than previous multiplier" ); multiplier = _multiplier; emit ChangeMultiplier(multiplier); } function totalSupply() public override view returns (uint256) { return _totalSupply.mul(multiplier).div(deci); } function setTotalSupply(uint256 inputTotalsupply) external onlyAdmin() { require( inputTotalsupply > totalSupply(), "the input total supply is not greater than present total supply" ); multiplier = (inputTotalsupply.mul(deci)).div(_totalSupply); emit ChangeMultiplier(multiplier); } function balanceOf(address account) public override view returns (uint256) { uint256 externalAmt; externalAmt = _balances[account].mul(multiplier).div(deci); return externalAmt; } function transfer(address recipient, uint256 amount) public virtual override Notblacklist(msg.sender) Notblacklist(recipient) ispaused() returns (bool) { uint256 internalAmt; uint256 externalAmt = amount; internalAmt = (amount.mul(deci)).div(multiplier); _transfer(msg.sender, recipient, externalAmt); return true; } function allowance(address owner, address spender) public virtual override view returns (uint256) { uint256 internalAmt; uint256 maxapproval = 115792089237316195423570985008687907853269984665640564039457584007913129639935; maxapproval = maxapproval.div(multiplier).mul(deci); if(_allowances[owner][spender] > maxapproval){ internalAmt = 115792089237316195423570985008687907853269984665640564039457584007913129639935; }else{ internalAmt = (_allowances[owner][spender]).mul(multiplier).div(deci); } return internalAmt; } function approve(address spender, uint256 amount) public virtual override Notblacklist(spender) Notblacklist(msg.sender) ispaused() returns (bool) { uint256 internalAmt; uint256 externalAmt = amount; _approve(msg.sender, spender, externalAmt); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public Notblacklist(spender) Notblacklist(msg.sender) ispaused() returns (bool) { uint256 externalAmt = allowance(_msgSender(),spender) ; _approve(_msgSender(), spender, externalAmt.add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public Notblacklist(spender) Notblacklist(msg.sender) ispaused() returns (bool) { uint256 externalAmt = allowance(_msgSender(),spender) ; _approve(_msgSender(), spender, externalAmt.sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } function transferFrom( address sender, address recipient, uint256 amount ) public virtual override Notblacklist(sender) Notblacklist(msg.sender) Notblacklist(recipient) ispaused() returns (bool) { uint256 externalAmt = allowance(sender,_msgSender()); _transfer(sender, recipient, amount); _approve( sender, _msgSender(), externalAmt.sub( amount, "ERC20: transfer amount exceeds allowance" ) ); return true; } function _transfer( address sender, address recipient, uint256 externalAmt ) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); uint256 internalAmt = externalAmt.mul(deci).div(multiplier); _balances[sender] = _balances[sender].sub( internalAmt, "ERC20: transfer internalAmt exceeds balance" ); _balances[recipient] = _balances[recipient].add(internalAmt); emit Transfer(sender, recipient, externalAmt); } function mint(address mintTo, uint256 amount) public virtual onlyAdmin() ispaused() returns (bool) { uint256 externalAmt = amount; uint256 internalAmt = externalAmt.mul(deci).div(multiplier); _mint(mintTo, internalAmt, externalAmt); return true; } function _mint( address account, uint256 internalAmt, uint256 externalAmt ) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _totalSupply = _totalSupply.add(internalAmt); _balances[account] = _balances[account].add(internalAmt); emit Transfer(address(0), account, externalAmt); } function burn(address burnFrom, uint256 amount) public virtual onlyAdmin() ispaused() returns (bool) { uint256 internalAmt; uint256 externalAmt = amount; internalAmt = externalAmt.mul(deci).div(multiplier); _burn(burnFrom, internalAmt, externalAmt); return true; } function _burn( address account, uint256 internalAmt, uint256 externalAmt ) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _balances[account] = _balances[account].sub( internalAmt, "ERC20: burn internaAmt exceeds balance" ); _totalSupply = _totalSupply.sub(internalAmt); emit Transfer(account, address(0), externalAmt); } function _approve( address owner, address spender, uint256 externalAmt ) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); uint256 internalAmt; uint256 maxapproval = 115792089237316195423570985008687907853269984665640564039457584007913129639935; maxapproval = maxapproval.div(multiplier).mul(deci); if(externalAmt > maxapproval){ internalAmt = 115792089237316195423570985008687907853269984665640564039457584007913129639935; }else{ internalAmt = externalAmt.mul(deci).div(multiplier); } _allowances[owner][spender] = internalAmt; emit Approval(owner, spender,externalAmt); } function TransferOwnerShip(address account) public onlyAdmin() { require(account != address(0), "account cannot be zero address"); require(msg.sender == admin, "you are not the admin"); admin = account; emit AdminChanged(admin); } function pause() external onlyAdmin() { getpause = true; } function unpause() external onlyAdmin() { getpause = false; } // pause unpause modifier ispaused() { require(getpause == false, "the contract is paused"); _; } modifier onlyAdmin() { require(msg.sender == admin, "you are not the admin"); _; } function AddToBlacklist(address account) external onlyAdmin() { blacklist[account] = true; emit fTokenBlacklist(account, true); } function RemoveFromBlacklist(address account) external onlyAdmin() { blacklist[account] = false; emit fTokenBlacklist(account, false); } modifier Notblacklist(address account) { require(!blacklist[account], "account is blacklisted"); _; } }
True
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/** *Submitted for verification at Etherscan.io on 2022-03-21 */ // SPDX-License-Identifier: MIT // File @openzeppelin/contracts/utils/introspection/[email protected] // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) /** * * DDDDDDDDDDDDD EEEEEEEEEEEEEEEEEEEEEE GGGGGGGGGGGGGEEEEEEEEEEEEEEEEEEEEEENNNNNNNN NNNNNNNN * D::::::::::::DDD E::::::::::::::::::::E GGG::::::::::::GE::::::::::::::::::::EN:::::::N N::::::N * D:::::::::::::::DD E::::::::::::::::::::E GG:::::::::::::::GE::::::::::::::::::::EN::::::::N N::::::N * DDD:::::DDDDD:::::DEE::::::EEEEEEEEE::::E G:::::GGGGGGGG::::GEE::::::EEEEEEEEE::::EN:::::::::N N::::::N * D:::::D D:::::D E:::::E EEEEEEG:::::G GGGGGG E:::::E EEEEEEN::::::::::N N::::::N * D:::::D D:::::DE:::::E G:::::G E:::::E N:::::::::::N N::::::N * D:::::D D:::::DE::::::EEEEEEEEEE G:::::G E::::::EEEEEEEEEE N:::::::N::::N N::::::N * D:::::D D:::::DE:::::::::::::::E G:::::G GGGGGGGGGG E:::::::::::::::E N::::::N N::::N N::::::N * D:::::D D:::::DE:::::::::::::::E G:::::G G::::::::G E:::::::::::::::E N::::::N N::::N:::::::N * D:::::D D:::::DE::::::EEEEEEEEEE G:::::G GGGGG::::G E::::::EEEEEEEEEE N::::::N N:::::::::::N * D:::::D D:::::DE:::::E G:::::G G::::G E:::::E N::::::N N::::::::::N * D:::::D D:::::D E:::::E EEEEEEG:::::G G::::G E:::::E EEEEEEN::::::N N:::::::::N * DDD:::::DDDDD:::::DEE::::::EEEEEEEE:::::E G:::::GGGGGGGG::::GEE::::::EEEEEEEE:::::EN::::::N N::::::::N * D:::::::::::::::DD E::::::::::::::::::::E GG:::::::::::::::GE::::::::::::::::::::EN::::::N N:::::::N * D::::::::::::DDD E::::::::::::::::::::E GGG::::::GGG:::GE::::::::::::::::::::EN::::::N N::::::N * DDDDDDDDDDDDD EEEEEEEEEEEEEEEEEEEEEE GGGGGG GGGGEEEEEEEEEEEEEEEEEEEEEENNNNNNNN NNNNNNN * * @degenzero * */ pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); } // File @openzeppelin/contracts/token/ERC721/[email protected] // OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol) pragma solidity ^0.8.0; /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes calldata data ) external; } // File @openzeppelin/contracts/token/ERC721/[email protected] // OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol) pragma solidity ^0.8.0; /** * @title ERC721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC721 asset contracts. */ interface IERC721Receiver { /** * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} * by `operator` from `from`, this function is called. * * It must return its Solidity selector to confirm the token transfer. * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted. * * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`. */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); } // File @openzeppelin/contracts/token/ERC721/extensions/[email protected] // OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol) pragma solidity ^0.8.0; /** * @title ERC-721 Non-Fungible Token Standard, optional metadata extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Metadata is IERC721 { /** * @dev Returns the token collection name. */ function name() external view returns (string memory); /** * @dev Returns the token collection symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token. */ function tokenURI(uint256 tokenId) external view returns (string memory); } // File @openzeppelin/contracts/token/ERC721/extensions/[email protected] // OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol) pragma solidity ^0.8.0; /** * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Enumerable is IERC721 { /** * @dev Returns the total amount of tokens stored by the contract. */ function totalSupply() external view returns (uint256); /** * @dev Returns a token ID owned by `owner` at a given `index` of its token list. * Use along with {balanceOf} to enumerate all of ``owner``'s tokens. */ function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256); /** * @dev Returns a token ID at a given `index` of all the tokens stored by the contract. * Use along with {totalSupply} to enumerate all tokens. */ function tokenByIndex(uint256 index) external view returns (uint256); } // File @openzeppelin/contracts/utils/[email protected] // OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } // File @openzeppelin/contracts/utils/[email protected] // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } } // File @openzeppelin/contracts/utils/[email protected] // OpenZeppelin Contracts v4.4.1 (utils/Strings.sol) pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); while (value != 0) { digits -= 1; buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); value /= 10; } return string(buffer); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0x00"; } uint256 temp = value; uint256 length = 0; while (temp != 0) { length++; temp >>= 8; } return toHexString(value, length); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _HEX_SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } } // File @openzeppelin/contracts/utils/introspection/[email protected] // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } } // File erc721a/contracts/[email protected] // Creator: Chiru Labs pragma solidity ^0.8.4; error ApprovalCallerNotOwnerNorApproved(); error ApprovalQueryForNonexistentToken(); error ApproveToCaller(); error ApprovalToCurrentOwner(); error BalanceQueryForZeroAddress(); error MintedQueryForZeroAddress(); error BurnedQueryForZeroAddress(); error AuxQueryForZeroAddress(); error MintToZeroAddress(); error MintZeroQuantity(); error OwnerIndexOutOfBounds(); error OwnerQueryForNonexistentToken(); error TokenIndexOutOfBounds(); error TransferCallerNotOwnerNorApproved(); error TransferFromIncorrectOwner(); error TransferToNonERC721ReceiverImplementer(); error TransferToZeroAddress(); error URIQueryForNonexistentToken(); /** * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including * the Metadata extension. Built to optimize for lower gas during batch mints. * * Assumes serials are sequentially minted starting at _startTokenId() (defaults to 0, e.g. 0, 1, 2, 3..). * * Assumes that an owner cannot have more than 2**64 - 1 (max value of uint64) of supply. * * Assumes that the maximum token id cannot exceed 2**256 - 1 (max value of uint256). */ contract ERC721A is Context, ERC165, IERC721, IERC721Metadata { using Address for address; using Strings for uint256; // Compiler will pack this into a single 256bit word. struct TokenOwnership { // The address of the owner. address addr; // Keeps track of the start time of ownership with minimal overhead for tokenomics. uint64 startTimestamp; // Whether the token has been burned. bool burned; } // Compiler will pack this into a single 256bit word. struct AddressData { // Realistically, 2**64-1 is more than enough. uint64 balance; // Keeps track of mint count with minimal overhead for tokenomics. uint64 numberMinted; // Keeps track of burn count with minimal overhead for tokenomics. uint64 numberBurned; // For miscellaneous variable(s) pertaining to the address // (e.g. number of whitelist mint slots used). // If there are multiple variables, please pack them into a uint64. uint64 aux; } // The tokenId of the next token to be minted. uint256 internal _currentIndex; // The number of tokens burned. uint256 internal _burnCounter; // Token name string private _name; // Token symbol string private _symbol; // Mapping from token ID to ownership details // An empty struct value does not necessarily mean the token is unowned. See ownershipOf implementation for details. mapping(uint256 => TokenOwnership) internal _ownerships; // Mapping owner address to address data mapping(address => AddressData) private _addressData; // Mapping from token ID to approved address mapping(uint256 => address) private _tokenApprovals; // Mapping from owner to operator approvals mapping(address => mapping(address => bool)) private _operatorApprovals; constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; _currentIndex = _startTokenId(); } /** * To change the starting tokenId, please override this function. */ function _startTokenId() internal view virtual returns (uint256) { return 0; } /** * @dev See {IERC721Enumerable-totalSupply}. * @dev Burned tokens are calculated here, use _totalMinted() if you want to count just minted tokens. */ function totalSupply() public view returns (uint256) { // Counter underflow is impossible as _burnCounter cannot be incremented // more than _currentIndex - _startTokenId() times unchecked { return _currentIndex - _burnCounter - _startTokenId(); } } /** * Returns the total amount of tokens minted in the contract. */ function _totalMinted() internal view returns (uint256) { // Counter underflow is impossible as _currentIndex does not decrement, // and it is initialized to _startTokenId() unchecked { return _currentIndex - _startTokenId(); } } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) { return interfaceId == type(IERC721).interfaceId || interfaceId == type(IERC721Metadata).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC721-balanceOf}. */ function balanceOf(address owner) public view override returns (uint256) { if (owner == address(0)) revert BalanceQueryForZeroAddress(); return uint256(_addressData[owner].balance); } /** * Returns the number of tokens minted by `owner`. */ function _numberMinted(address owner) internal view returns (uint256) { if (owner == address(0)) revert MintedQueryForZeroAddress(); return uint256(_addressData[owner].numberMinted); } /** * Returns the number of tokens burned by or on behalf of `owner`. */ function _numberBurned(address owner) internal view returns (uint256) { if (owner == address(0)) revert BurnedQueryForZeroAddress(); return uint256(_addressData[owner].numberBurned); } /** * Returns the auxillary data for `owner`. (e.g. number of whitelist mint slots used). */ function _getAux(address owner) internal view returns (uint64) { if (owner == address(0)) revert AuxQueryForZeroAddress(); return _addressData[owner].aux; } /** * Sets the auxillary data for `owner`. (e.g. number of whitelist mint slots used). * If there are multiple variables, please pack them into a uint64. */ function _setAux(address owner, uint64 aux) internal { if (owner == address(0)) revert AuxQueryForZeroAddress(); _addressData[owner].aux = aux; } /** * Gas spent here starts off proportional to the maximum mint batch size. * It gradually moves to O(1) as tokens get transferred around in the collection over time. */ function ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) { uint256 curr = tokenId; unchecked { if (_startTokenId() <= curr && curr < _currentIndex) { TokenOwnership memory ownership = _ownerships[curr]; if (!ownership.burned) { if (ownership.addr != address(0)) { return ownership; } // Invariant: // There will always be an ownership that has an address and is not burned // before an ownership that does not have an address and is not burned. // Hence, curr will not underflow. while (true) { curr--; ownership = _ownerships[curr]; if (ownership.addr != address(0)) { return ownership; } } } } } revert OwnerQueryForNonexistentToken(); } /** * @dev See {IERC721-ownerOf}. */ function ownerOf(uint256 tokenId) public view override returns (address) { return ownershipOf(tokenId).addr; } /** * @dev See {IERC721Metadata-name}. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev See {IERC721Metadata-symbol}. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev See {IERC721Metadata-tokenURI}. */ function tokenURI(uint256 tokenId) public view virtual override returns (string memory) { if (!_exists(tokenId)) revert URIQueryForNonexistentToken(); string memory baseURI = _baseURI(); return bytes(baseURI).length != 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : ''; } /** * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each * token will be the concatenation of the `baseURI` and the `tokenId`. Empty * by default, can be overriden in child contracts. */ function _baseURI() internal view virtual returns (string memory) { return ''; } /** * @dev See {IERC721-approve}. */ function approve(address to, uint256 tokenId) public override { address owner = ERC721A.ownerOf(tokenId); if (to == owner) revert ApprovalToCurrentOwner(); if (_msgSender() != owner && !isApprovedForAll(owner, _msgSender())) { revert ApprovalCallerNotOwnerNorApproved(); } _approve(to, tokenId, owner); } /** * @dev See {IERC721-getApproved}. */ function getApproved(uint256 tokenId) public view override returns (address) { if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken(); return _tokenApprovals[tokenId]; } /** * @dev See {IERC721-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public override { if (operator == _msgSender()) revert ApproveToCaller(); _operatorApprovals[_msgSender()][operator] = approved; emit ApprovalForAll(_msgSender(), operator, approved); } /** * @dev See {IERC721-isApprovedForAll}. */ function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) { return _operatorApprovals[owner][operator]; } /** * @dev See {IERC721-transferFrom}. */ function transferFrom( address from, address to, uint256 tokenId ) public virtual override { _transfer(from, to, tokenId); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId ) public virtual override { safeTransferFrom(from, to, tokenId, ''); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes memory _data ) public virtual override { _transfer(from, to, tokenId); if (to.isContract() && !_checkContractOnERC721Received(from, to, tokenId, _data)) { revert TransferToNonERC721ReceiverImplementer(); } } /** * @dev Returns whether `tokenId` exists. * * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}. * * Tokens start existing when they are minted (`_mint`), */ function _exists(uint256 tokenId) internal view returns (bool) { return _startTokenId() <= tokenId && tokenId < _currentIndex && !_ownerships[tokenId].burned; } function _safeMint(address to, uint256 quantity) internal { _safeMint(to, quantity, ''); } /** * @dev Safely mints `quantity` tokens and transfers them to `to`. * * Requirements: * * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called for each safe transfer. * - `quantity` must be greater than 0. * * Emits a {Transfer} event. */ function _safeMint( address to, uint256 quantity, bytes memory _data ) internal { _mint(to, quantity, _data, true); } /** * @dev Mints `quantity` tokens and transfers them to `to`. * * Requirements: * * - `to` cannot be the zero address. * - `quantity` must be greater than 0. * * Emits a {Transfer} event. */ function _mint( address to, uint256 quantity, bytes memory _data, bool safe ) internal { uint256 startTokenId = _currentIndex; if (to == address(0)) revert MintToZeroAddress(); if (quantity == 0) revert MintZeroQuantity(); _beforeTokenTransfers(address(0), to, startTokenId, quantity); // Overflows are incredibly unrealistic. // balance or numberMinted overflow if current value of either + quantity > 1.8e19 (2**64) - 1 // updatedIndex overflows if _currentIndex + quantity > 1.2e77 (2**256) - 1 unchecked { _addressData[to].balance += uint64(quantity); _addressData[to].numberMinted += uint64(quantity); _ownerships[startTokenId].addr = to; _ownerships[startTokenId].startTimestamp = uint64(block.timestamp); uint256 updatedIndex = startTokenId; uint256 end = updatedIndex + quantity; if (safe && to.isContract()) { do { emit Transfer(address(0), to, updatedIndex); if (!_checkContractOnERC721Received(address(0), to, updatedIndex++, _data)) { revert TransferToNonERC721ReceiverImplementer(); } } while (updatedIndex != end); // Reentrancy protection if (_currentIndex != startTokenId) revert(); } else { do { emit Transfer(address(0), to, updatedIndex++); } while (updatedIndex != end); } _currentIndex = updatedIndex; } _afterTokenTransfers(address(0), to, startTokenId, quantity); } /** * @dev Transfers `tokenId` from `from` to `to`. * * Requirements: * * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * * Emits a {Transfer} event. */ function _transfer( address from, address to, uint256 tokenId ) private { TokenOwnership memory prevOwnership = ownershipOf(tokenId); bool isApprovedOrOwner = (_msgSender() == prevOwnership.addr || isApprovedForAll(prevOwnership.addr, _msgSender()) || getApproved(tokenId) == _msgSender()); if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved(); if (prevOwnership.addr != from) revert TransferFromIncorrectOwner(); if (to == address(0)) revert TransferToZeroAddress(); _beforeTokenTransfers(from, to, tokenId, 1); // Clear approvals from the previous owner _approve(address(0), tokenId, prevOwnership.addr); // Underflow of the sender's balance is impossible because we check for // ownership above and the recipient's balance can't realistically overflow. // Counter overflow is incredibly unrealistic as tokenId would have to be 2**256. unchecked { _addressData[from].balance -= 1; _addressData[to].balance += 1; _ownerships[tokenId].addr = to; _ownerships[tokenId].startTimestamp = uint64(block.timestamp); // If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it. // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls. uint256 nextTokenId = tokenId + 1; if (_ownerships[nextTokenId].addr == address(0)) { // This will suffice for checking _exists(nextTokenId), // as a burned slot cannot contain the zero address. if (nextTokenId < _currentIndex) { _ownerships[nextTokenId].addr = prevOwnership.addr; _ownerships[nextTokenId].startTimestamp = prevOwnership.startTimestamp; } } } emit Transfer(from, to, tokenId); _afterTokenTransfers(from, to, tokenId, 1); } /** * @dev Destroys `tokenId`. * The approval is cleared when the token is burned. * * Requirements: * * - `tokenId` must exist. * * Emits a {Transfer} event. */ function _burn(uint256 tokenId) internal virtual { TokenOwnership memory prevOwnership = ownershipOf(tokenId); _beforeTokenTransfers(prevOwnership.addr, address(0), tokenId, 1); // Clear approvals from the previous owner _approve(address(0), tokenId, prevOwnership.addr); // Underflow of the sender's balance is impossible because we check for // ownership above and the recipient's balance can't realistically overflow. // Counter overflow is incredibly unrealistic as tokenId would have to be 2**256. unchecked { _addressData[prevOwnership.addr].balance -= 1; _addressData[prevOwnership.addr].numberBurned += 1; // Keep track of who burned the token, and the timestamp of burning. _ownerships[tokenId].addr = prevOwnership.addr; _ownerships[tokenId].startTimestamp = uint64(block.timestamp); _ownerships[tokenId].burned = true; // If the ownership slot of tokenId+1 is not explicitly set, that means the burn initiator owns it. // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls. uint256 nextTokenId = tokenId + 1; if (_ownerships[nextTokenId].addr == address(0)) { // This will suffice for checking _exists(nextTokenId), // as a burned slot cannot contain the zero address. if (nextTokenId < _currentIndex) { _ownerships[nextTokenId].addr = prevOwnership.addr; _ownerships[nextTokenId].startTimestamp = prevOwnership.startTimestamp; } } } emit Transfer(prevOwnership.addr, address(0), tokenId); _afterTokenTransfers(prevOwnership.addr, address(0), tokenId, 1); // Overflow not possible, as _burnCounter cannot be exceed _currentIndex times. unchecked { _burnCounter++; } } /** * @dev Approve `to` to operate on `tokenId` * * Emits a {Approval} event. */ function _approve( address to, uint256 tokenId, address owner ) private { _tokenApprovals[tokenId] = to; emit Approval(owner, to, tokenId); } /** * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target contract. * * @param from address representing the previous owner of the given token ID * @param to target address that will receive the tokens * @param tokenId uint256 ID of the token to be transferred * @param _data bytes optional data to send along with the call * @return bool whether the call correctly returned the expected magic value */ function _checkContractOnERC721Received( address from, address to, uint256 tokenId, bytes memory _data ) private returns (bool) { try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) { return retval == IERC721Receiver(to).onERC721Received.selector; } catch (bytes memory reason) { if (reason.length == 0) { revert TransferToNonERC721ReceiverImplementer(); } else { assembly { revert(add(32, reason), mload(reason)) } } } } /** * @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting. * And also called before burning one token. * * startTokenId - the first token id to be transferred * quantity - the amount to be transferred * * Calling conditions: * * - When `from` and `to` are both non-zero, `from`'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. * - When `to` is zero, `tokenId` will be burned by `from`. * - `from` and `to` are never both zero. */ function _beforeTokenTransfers( address from, address to, uint256 startTokenId, uint256 quantity ) internal virtual {} /** * @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes * minting. * And also called after one token has been burned. * * startTokenId - the first token id to be transferred * quantity - the amount to be transferred * * Calling conditions: * * - When `from` and `to` are both non-zero, `from`'s `tokenId` has been * transferred to `to`. * - When `from` is zero, `tokenId` has been minted for `to`. * - When `to` is zero, `tokenId` has been burned by `from`. * - `from` and `to` are never both zero. */ function _afterTokenTransfers( address from, address to, uint256 startTokenId, uint256 quantity ) internal virtual {} } // File @openzeppelin/contracts/security/[email protected] // OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol) pragma solidity ^0.8.0; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; constructor() { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and making it call a * `private` function that does the actual work. */ modifier nonReentrant() { // On the first call to nonReentrant, _notEntered will be true require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; _; // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } } // File @openzeppelin/contracts/access/[email protected] // OpenZeppelin Contracts v4.4.1 (access/Ownable.sol) pragma solidity ^0.8.0; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(owner() == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } } // File @openzeppelin/contracts/security/[email protected] // OpenZeppelin Contracts v4.4.1 (security/Pausable.sol) pragma solidity ^0.8.0; /** * @dev Contract module which allows children to implement an emergency stop * mechanism that can be triggered by an authorized account. * * This module is used through inheritance. It will make available the * modifiers `whenNotPaused` and `whenPaused`, which can be applied to * the functions of your contract. Note that they will not be pausable by * simply including this module, only once the modifiers are put in place. */ abstract contract Pausable is Context { /** * @dev Emitted when the pause is triggered by `account`. */ event Paused(address account); /** * @dev Emitted when the pause is lifted by `account`. */ event Unpaused(address account); bool private _paused; /** * @dev Initializes the contract in unpaused state. */ constructor() { _paused = false; } /** * @dev Returns true if the contract is paused, and false otherwise. */ function paused() public view virtual returns (bool) { return _paused; } /** * @dev Modifier to make a function callable only when the contract is not paused. * * Requirements: * * - The contract must not be paused. */ modifier whenNotPaused() { require(!paused(), "Pausable: paused"); _; } /** * @dev Modifier to make a function callable only when the contract is paused. * * Requirements: * * - The contract must be paused. */ modifier whenPaused() { require(paused(), "Pausable: not paused"); _; } /** * @dev Triggers stopped state. * * Requirements: * * - The contract must not be paused. */ function _pause() internal virtual whenNotPaused { _paused = true; emit Paused(_msgSender()); } /** * @dev Returns to normal state. * * Requirements: * * - The contract must be paused. */ function _unpause() internal virtual whenPaused { _paused = false; emit Unpaused(_msgSender()); } } // File @openzeppelin/contracts/utils/cryptography/[email protected] // OpenZeppelin Contracts (last updated v4.5.0) (utils/cryptography/MerkleProof.sol) pragma solidity ^0.8.0; /** * @dev These functions deal with verification of Merkle Trees proofs. * * The proofs can be generated using the JavaScript library * https://github.com/miguelmota/merkletreejs[merkletreejs]. * Note: the hashing algorithm should be keccak256 and pair sorting should be enabled. * * See `test/utils/cryptography/MerkleProof.test.js` for some examples. */ library MerkleProof { /** * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree * defined by `root`. For this, a `proof` must be provided, containing * sibling hashes on the branch from the leaf to the root of the tree. Each * pair of leaves and each pair of pre-images are assumed to be sorted. */ function verify( bytes32[] memory proof, bytes32 root, bytes32 leaf ) internal pure returns (bool) { return processProof(proof, leaf) == root; } /** * @dev Returns the rebuilt hash obtained by traversing a Merklee tree up * from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt * hash matches the root of the tree. When processing the proof, the pairs * of leafs & pre-images are assumed to be sorted. * * _Available since v4.4._ */ function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) { bytes32 computedHash = leaf; for (uint256 i = 0; i < proof.length; i++) { bytes32 proofElement = proof[i]; if (computedHash <= proofElement) { // Hash(current computed hash + current element of the proof) computedHash = _efficientHash(computedHash, proofElement); } else { // Hash(current element of the proof + current computed hash) computedHash = _efficientHash(proofElement, computedHash); } } return computedHash; } function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) { assembly { mstore(0x00, a) mstore(0x20, b) value := keccak256(0x00, 0x40) } } } // File contracts/DegenProject.sol pragma solidity ^0.8.4; error DListedOnly(); error InsufficientPayment(); error IncorrectPayment(); error AccountNotWhitelisted(); error AmountExceedsSupply(); error IncorrectBatchSize(); contract DegenProject is ERC721A, Ownable, Pausable { uint public price; uint public maxSupply; uint public maxBatchSize = 3; uint public maxDLmint = 3; uint public maxDLRewardmint = 1; bytes32 public DLRoot; bytes32 public DLRewardRoot; bool public isDListOnly; string private _baseTokenURI; mapping(address => uint) public DLClaimed; mapping(address => uint) public DLRewardClaimed; constructor(uint supply, uint mintPrice, string memory baseTokenURI) ERC721A("Degen Project", "DPNFT") { maxSupply = supply; price = mintPrice; _baseTokenURI = baseTokenURI; } /// @dev Returns the tokenIds of the address. O(totalSupply) in complexity. function tokensOfOwner(address owner) external view returns (uint256[] memory) { unchecked { uint256[] memory a = new uint256[](balanceOf(owner)); uint256 end = _currentIndex; uint256 tokenIdsIdx; address currOwnershipAddr; for (uint256 i; i < end; i++) { TokenOwnership memory ownership = _ownerships[i]; if (ownership.burned) { continue; } if (ownership.addr != address(0)) { currOwnershipAddr = ownership.addr; } if (currOwnershipAddr == owner) { a[tokenIdsIdx++] = i; } } return a; } } function setPrice(uint mintPrice) public onlyOwner { price = mintPrice; } function safeMintDL(uint256 quantity, bytes32[] calldata signature) public whenNotPaused payable { require(((DLClaimed[msg.sender]+quantity) <= maxDLmint), "DPNFT: Quantity Exceeds Max Allowed"); bytes32 leaf = keccak256(abi.encodePacked(msg.sender)); require( MerkleProof.verify(signature, DLRoot, leaf), "DPNFT: Address not whitelisted." ); if (quantity > maxBatchSize) revert IncorrectBatchSize(); if (totalSupply() + quantity > maxSupply) revert AmountExceedsSupply(); if ((quantity * price) != msg.value) revert IncorrectPayment(); _safeMint(msg.sender, quantity); payable(owner()).transfer(msg.value); DLClaimed[msg.sender] += quantity; } function safeMintReward(bytes32[] calldata signature) public whenNotPaused { require(((DLRewardClaimed[msg.sender]+1) <= maxDLRewardmint), "DPNFT: Quantity Exceeds Max Allowed"); bytes32 leaf = keccak256(abi.encodePacked(msg.sender)); require( MerkleProof.verify(signature, DLRewardRoot, leaf), "DPNFT: Address not whitelisted." ); if (totalSupply() + 1 > maxSupply) revert AmountExceedsSupply(); _safeMint(msg.sender, 1); DLRewardClaimed[msg.sender] += 1; } function safeMint(uint256 quantity) public whenNotPaused payable { if (isDListOnly) revert DListedOnly(); if (quantity > maxBatchSize) revert IncorrectBatchSize(); if (totalSupply() + quantity > maxSupply) revert AmountExceedsSupply(); if ((quantity * price) != msg.value) revert IncorrectPayment(); _safeMint(msg.sender, quantity); payable(owner()).transfer(msg.value); } function setMaxBatchSize(uint size) public onlyOwner { maxBatchSize = size; } function setBaseURI(string memory baseURI) public onlyOwner { _baseTokenURI = baseURI; } function setDLRoot(bytes32 root) public onlyOwner { DLRoot = root; } function setDLRewardRoot(bytes32 root) public onlyOwner { DLRewardRoot = root; } function setDListStatus(bool _isDListOnly) public onlyOwner { isDListOnly = _isDListOnly; } function _baseURI() internal view virtual override returns (string memory) { return _baseTokenURI; } function _startTokenId() internal view virtual override returns (uint256) { return 1; } function pause() public onlyOwner { _pause(); } function unpause() public onlyOwner { _unpause(); } } // File contracts/DegenProject.flat.sol
True
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/** *Submitted for verification at Etherscan.io on 2022-01-30 */ // SPDX-License-Identifier: MIT pragma solidity ^0.7.6; pragma abicoder v2; interface IERC165 { function supportsInterface(bytes4 interfaceId) external view returns (bool); } contract ERC165 is IERC165 { bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7; mapping(bytes4 => bool) private _supportedInterfaces; constructor () { _registerInterface(_INTERFACE_ID_ERC165); } function supportsInterface(bytes4 interfaceId) public view override returns (bool) { return _supportedInterfaces[interfaceId]; } function _registerInterface(bytes4 interfaceId) internal virtual { require(interfaceId != 0xffffffff, "ERC165: invalid interface id"); _supportedInterfaces[interfaceId] = true; } } interface IERC20 { function totalSupply() external view returns (uint256); function balanceOf(address account) external view returns (uint256); function transfer(address recipient, uint256 amount) external returns (bool); function allowance(address owner, address spender) external view returns (uint256); function approve(address spender, uint256 amount) external returns (bool); function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); function burn(uint256 burnQuantity) external returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); event Approval(address indexed owner, address indexed spender, uint256 value); } interface IERC721 is IERC165 { event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); event ApprovalForAll(address indexed owner, address indexed operator, bool approved); function balanceOf(address owner) external view returns (uint256 balance); function ownerOf(uint256 tokenId) external view returns (address owner); function safeTransferFrom(address from, address to, uint256 tokenId) external; function transferFrom(address from, address to, uint256 tokenId) external; function approve(address to, uint256 tokenId) external; function getApproved(uint256 tokenId) external view returns (address operator); function setApprovalForAll(address operator, bool _approved) external; function isApprovedForAll(address owner, address operator) external view returns (bool); function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external; } interface IERC721Enumerable is IERC721 { function totalSupply() external view returns (uint256); function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId); function tokenByIndex(uint256 index) external view returns (uint256); } interface IERC721Metadata is IERC721 { function name() external view returns (string memory); function symbol() external view returns (string memory); } interface IERC721Receiver { function onERC721Received(address operator, address from, uint256 tokenId, bytes calldata data) external returns (bytes4); } library Address { function isContract(address account) internal view returns (bool) { uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: value }(data); return _verifyCallResult(success, returndata, errorMessage); } function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.staticcall(data); return _verifyCallResult(success, returndata, errorMessage); } function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.delegatecall(data); return _verifyCallResult(success, returndata, errorMessage); } function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) { if (success) { return returndata; } else { if (returndata.length > 0) { // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; return msg.data; } } library EnumerableMap { struct MapEntry { bytes32 _key; bytes32 _value; } struct Map { MapEntry[] _entries; mapping (bytes32 => uint256) _indexes; } function _set(Map storage map, bytes32 key, bytes32 value) private returns (bool) { uint256 keyIndex = map._indexes[key]; if (keyIndex == 0) { map._entries.push(MapEntry({ _key: key, _value: value })); map._indexes[key] = map._entries.length; return true; } else { map._entries[keyIndex - 1]._value = value; return false; } } function _remove(Map storage map, bytes32 key) private returns (bool) { uint256 keyIndex = map._indexes[key]; if (keyIndex != 0) { uint256 toDeleteIndex = keyIndex - 1; uint256 lastIndex = map._entries.length - 1; MapEntry storage lastEntry = map._entries[lastIndex]; map._entries[toDeleteIndex] = lastEntry; map._indexes[lastEntry._key] = toDeleteIndex + 1; map._entries.pop(); delete map._indexes[key]; return true; } else { return false; } } function _contains(Map storage map, bytes32 key) private view returns (bool) { return map._indexes[key] != 0; } function _length(Map storage map) private view returns (uint256) { return map._entries.length; } function _at(Map storage map, uint256 index) private view returns (bytes32, bytes32) { require(map._entries.length > index, "EnumerableMap: index out of bounds"); MapEntry storage entry = map._entries[index]; return (entry._key, entry._value); } function _get(Map storage map, bytes32 key) private view returns (bytes32) { return _get(map, key, "EnumerableMap: nonexistent key"); } function _get(Map storage map, bytes32 key, string memory errorMessage) private view returns (bytes32) { uint256 keyIndex = map._indexes[key]; require(keyIndex != 0, errorMessage); // Equivalent to contains(map, key) return map._entries[keyIndex - 1]._value; // All indexes are 1-based } struct UintToAddressMap { Map _inner; } function set(UintToAddressMap storage map, uint256 key, address value) internal returns (bool) { return _set(map._inner, bytes32(key), bytes32(uint256(value))); } function remove(UintToAddressMap storage map, uint256 key) internal returns (bool) { return _remove(map._inner, bytes32(key)); } function contains(UintToAddressMap storage map, uint256 key) internal view returns (bool) { return _contains(map._inner, bytes32(key)); } function length(UintToAddressMap storage map) internal view returns (uint256) { return _length(map._inner); } function at(UintToAddressMap storage map, uint256 index) internal view returns (uint256, address) { (bytes32 key, bytes32 value) = _at(map._inner, index); return (uint256(key), address(uint256(value))); } function get(UintToAddressMap storage map, uint256 key) internal view returns (address) { return address(uint256(_get(map._inner, bytes32(key)))); } function get(UintToAddressMap storage map, uint256 key, string memory errorMessage) internal view returns (address) { return address(uint256(_get(map._inner, bytes32(key), errorMessage))); } } library EnumerableSet { struct Set { bytes32[] _values; mapping (bytes32 => uint256) _indexes; } function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); set._indexes[value] = set._values.length; return true; } else { return false; } } function _remove(Set storage set, bytes32 value) private returns (bool) { uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; bytes32 lastvalue = set._values[lastIndex]; set._values[toDeleteIndex] = lastvalue; set._indexes[lastvalue] = toDeleteIndex + 1; set._values.pop(); delete set._indexes[value]; return true; } else { return false; } } function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } function _length(Set storage set) private view returns (uint256) { return set._values.length; } function _at(Set storage set, uint256 index) private view returns (bytes32) { require(set._values.length > index, "EnumerableSet: index out of bounds"); return set._values[index]; } struct AddressSet { Set _inner; } function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(value))); } function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(value))); } function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(value))); } function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint256(_at(set._inner, index))); } struct UintSet { Set _inner; } function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } } contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); constructor () { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } function owner() public view returns (address) { return _owner; } modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } library SafeMath { function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } library Strings { function toString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); uint256 index = digits - 1; temp = value; while (temp != 0) { buffer[index--] = byte(uint8(48 + temp % 10)); temp /= 10; } return string(buffer); } } contract TheHedgehog is Context, Ownable, ERC165, IERC721Metadata { using SafeMath for uint256; using Address for address; using EnumerableSet for EnumerableSet.UintSet; using EnumerableMap for EnumerableMap.UintToAddressMap; using Strings for uint256; uint256 public constant MAX_NFT_SUPPLY = 10000; uint256 public presaleStartTimestamp = 1643551200; uint256 public saleStartTimestamp = 1643638500; string public baseURI = "https://gateway.pinata.cloud/ipfs/QmdbPUUBpDrH5JgiBSaQmxzyLwp99xYHp2X52s82jHtCiY/"; mapping (address => uint256) private rewards; uint256 private _state = 1; bytes4 private constant _ERC721_RECEIVED = 0x150b7a02; mapping (address => EnumerableSet.UintSet) private _holderTokens; EnumerableMap.UintToAddressMap private _tokenOwners; mapping (uint256 => address) private _tokenApprovals; mapping (address => mapping (address => bool)) private _operatorApprovals; string private _name; string private _symbol; bytes4 private constant _INTERFACE_ID_ERC721 = 0x80ac58cd; bytes4 private constant _INTERFACE_ID_ERC721_METADATA = 0x93254542; bytes4 private constant _INTERFACE_ID_ERC721_ENUMERABLE = 0x780e9d63; constructor () { _registerInterface(_INTERFACE_ID_ERC721); _registerInterface(_INTERFACE_ID_ERC721_METADATA); _registerInterface(_INTERFACE_ID_ERC721_ENUMERABLE); } function balanceOf(address owner) public view override returns (uint256) { require(owner != address(0), "ERC721: balance query for the zero address"); return _holderTokens[owner].length(); } function ownerOf(uint256 tokenId) public view override returns (address) { return _tokenOwners.get(tokenId, "ERC721: owner query for nonexistent token"); } function name() public pure override returns (string memory) { return "The Hedgehog"; } function symbol() public pure override returns (string memory) { return "TH"; } function tokenOfOwnerByIndex(address owner, uint256 index) public view returns (uint256) { return _holderTokens[owner].at(index); } function totalSupply() public view returns (uint256) { return _tokenOwners.length(); } function tokenByIndex(uint256 index) public view returns (uint256) { (uint256 tokenId, ) = _tokenOwners.at(index); return tokenId; } function getReward(address customer) public view returns (uint256) { return rewards[customer]; } function getNFTPricePreSale() public pure returns (uint256) { return 0.02 ether; } function getNFTPrice() public pure returns (uint256) { return 0.03 ether; } function _getRandomNumber() private returns (uint256) { return uint256(blockhash(block.number - 1)); } function _draw(uint256 tikets, uint256 start) private { uint256 seed = _getRandomNumber(); uint256 budget = 10 ether; for (uint256 i = 0; i < tikets; i++) { uint256 winning_tiket = start + (seed >> i) % 2000; rewards[ownerOf(winning_tiket)] += budget / tikets; } } function draw1() public { require(totalSupply() >= 2000, "20% not closed yet"); require(_state == 1, "First draw has been"); _draw(15, 0); _state <<= 1; } function draw2() public { require(totalSupply() >= 4000, "40% not closed yet"); require(_state == 2, "Second draw has been"); _draw(12, 2000); _state <<= 1; } function draw3() public { require(totalSupply() >= 6000, "60% not closed yet"); require(_state == 4, "Third draw has been"); _draw(9, 4000); _state <<= 1; } function draw4() public { require(totalSupply() >= 8000, "80% not closed yet"); require(_state == 8, "Fourth draw has been"); _draw(6, 6000); _state <<= 1; } function draw5() public { require(totalSupply() == 10000, "100% not closed yet"); require(_state == 16, "Fifth draw has been"); _draw(3, 8000); _state <<= 1; } modifier preSale() { require(block.timestamp >= presaleStartTimestamp, "Presale has not started"); require(block.timestamp < saleStartTimestamp && ( // dev msg.sender == 0x77AB2F647C440fC0340bbE2f0bf9C1E981A61935 || // white list msg.sender == 0x1596c68cf5b99a737a84De1B2FFda09D9F715eDB || msg.sender == 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0xc89843375A24533f2302562babdeBF5860431A44 || msg.sender == 0x4c7B019F4B268381d3Bd946068B8815F2edAd087 || msg.sender == 0x9915C3881f2c03897c2fB4733e01ba3Cae2C5363 || msg.sender == 0xf8AfE53045DE4A62Ee93021457298FDB6956f0e7 || msg.sender == 0x93929CdA1F479745879C35180eCa54561fbA467a || msg.sender == 0x31CaD254D6dFAF50ca2e4A36aDba568319970CB0 || msg.sender == 0x38791c6c0DEb39a56cd4C1C54F52eF2336DB1587 || msg.sender == 0xe995425373A5C10ECb425baDa14a3F5cBaB9Dda5 || msg.sender == 0xf75f39c7A31A13B34e728C41E34b9fA8f5766e62 || msg.sender == 0x4F7350cAE2d6279DaC4c461d5b3eE73b0cc2093D || msg.sender == 0xEfE512a8c8e9564B9a072F84A40AF7a327eB2ab1 || msg.sender == 0xe7E7E92fB4B3C2D302b8Baea5EA61d730f1c8C7E || msg.sender == 0xD8e1F5432191573e5C2cD96bc4d1B9c8E0CdD0A7 || msg.sender == 0xdcA5dA7B9fCF5ACaADE99223cc8A55a5687d593a || msg.sender == 0x92Dc57dEA003Ed646Cbd9a14b5ffD53B49F65b55 || msg.sender == 0x5f4BA42CBFC4F3D31F7E8Fc347CE2B88d7964B6F || msg.sender == 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0xEC1Fd0C476AD2DFCB4010d51039ac5A4f85b2D4b || msg.sender == 0x0033cD590d1C0462A641FA12392F4A4A15Fd348D || msg.sender == 0x2F2D8c0E48B15c11e38D5d43376Eee512EFe1eD2 || msg.sender == 0xB337de43321924A70a6fa0fe83f999F50F4FcAD9 || msg.sender == 0x88801c17d9a25CeB493F5861AC005DE333DE6f41 || msg.sender == 0xDad863572502Bdd771037767E9FCCD4e6DFB4bdc || msg.sender == 0xdB6DFff715D4D1b62d66B3f7da4988ff5aCA09C4 || msg.sender == 0x5D838fD6634E348378BCE7f9C5F8a2b725324f8B || msg.sender == 0x622c6904061c5C1b9CD647ec0d7e4c64e4dE28B8 || msg.sender == 0x2e300C9f3423c1cb2eBC18A39447731AD8E30618 || msg.sender == 0x26F97A899569A009F924C32C49Ad3B3784DBC6e7 || msg.sender == 0xe1E778c4D4B6b24d06A82f6A5b6e3348F4D62DD4 || msg.sender == 0xbC83998221297A707A6bda05F4b9e96981DC2A9a || msg.sender == 0x7a4888143A5EEF5051374a5eE79BD313A77e20D0 || msg.sender == 0xBAfcc6d5d1Be9caBEd01c27B9EB7Eb8b1579fFC9 || msg.sender == 0x140f456F938276AF64E401648D4f2707214EaE2d || msg.sender == 0xF7437eDdBd414649E681D186325Cf77Ee41414D5 || msg.sender == 0x0Ee429a521FBc47F3485018E44B64E57114ec02f || msg.sender == 0x1B25b8E4d0131406c7A550A509EF8212e1EaEed3 || msg.sender == 0x1b78dd5f75A403240cd99a5b80B559af534c3E39 || msg.sender == 0x1Fd8A8EBAE857976243dCC38c37A143494d493E5 || msg.sender == 0xfAd447C70db84D3d0D1c6b1571B78f2783E5a1ef || msg.sender == 0x59c31aA5511F359603E1289880d849638189EB66 || msg.sender == 0x28E010aC105078a82c0F72E5164c846EF26fDD82 || msg.sender == 0xa6f23C14399f805dC5f047c1d008415521c788a6 || msg.sender == 0xB4FEEDbA6d88010fac432259916b26Fc4B42b520 || msg.sender == 0xfd0A8e5802467cA6B1880688De5AF3087C3200A0 || msg.sender == 0x41643adA6759940f3902F501b028C3983A063dCd || msg.sender == 0x1CCF8D30D9F11C69b033590364a8587828786C2E || msg.sender == 0x8AAfd15081E92F04E3A3d8f32772bbEd950b1c16 || msg.sender == 0xf0D53d71E2DE9500663325860b9c0E17A2d0449A || msg.sender == 0x9A34cAFE6b1EC63E29c69F897794AF33d16f2cC6 || msg.sender == 0x324037F6038F28Be3d512d4434F67170d9272EA2 || msg.sender == 0x5D0461a8811AC2e48d2A645b9e8A3F3CB02aB6f7 || msg.sender == 0x6806d7f412023C45023BbE618F8Af2C7D4094806 || msg.sender == 0x760aFb2DDa29f41B87885653b1c439b02F17E405 || msg.sender == 0x25C314CAdA97a12A4B8891E050237DC2aab1F88e || msg.sender == 0x77bf1b69872eb50b0f87D2346d8047FbE1EcFE41 || msg.sender == 0x8929dB07015a0cd7F23CDB11C650EF283faE8B57 || msg.sender == 0xa8022Ace348c792530F50D3b94b1D8dac581ddEC || msg.sender == 0xdbCE75dc01C454Dd444C1Ae3c60F450a1d235AaF || msg.sender == 0x24356541E3659aE3E3a41e43fd74CCd5A41f6032 || msg.sender == 0x38FCEf3d801Ac4163cCbCd2fcc182AE7FF6500A0 || msg.sender == 0x842B33D8Def67C243cCFa68a214285dD442BBee7 || msg.sender == 0x0c5d6cD6E268531fc1Ee775F6742DDEE95663703 || msg.sender == 0xef8eB7b986f00Cbf26c8Ca50b178860F8C86b267 || msg.sender == 0xA0C8eA0912333Cb722CEaF8d5A7565fD43C11D36 || msg.sender == 0x73D601DC9B8133Fb3813815624853BEC226ff658 || msg.sender == 0xd702f78B8108eaC614105c3C6B9c2a505D345985 || msg.sender == 0x0e67f997c0965C6F6CA1E79CB46c9CED0751a6E0 || msg.sender == 0x1f6b35B7B142f965fFB5A5b9AC1ffEB7B79A2fE9 || msg.sender == 0x32AEc4Ea9f088590A06e3c0e49A11580cD284Ed0 || msg.sender == 0x34c287139Fa380A7f20005835d124489E1336880 || msg.sender == 0x0713665Aa43d5147A699b8210F3326736BeC5147 || msg.sender == 0x7fBDdF009F20125E001775aD272dc6C6289cF266 || msg.sender == 0x820Af22BCfca12D9CF63972e9a5C2E0831ea258E || msg.sender == 0x35cdd015780460460B0687ff23938d1d63f88234 || msg.sender == 0x9f547600CD628648d07e228eEd010f3972b2674c || msg.sender == 0x229Cd94bFB75De4C989C502037426D8a8a16f8eD || msg.sender == 0xDB906E83001887B3ed8ACB0fA915014E49b4A032 || msg.sender == 0x4D2f53DB7833C22aD63D2Cd6781D76F91dCF31aa || msg.sender == 0xf92C7669Ad8711EC631890241c07821B39FbFb46 || msg.sender == 0xa0A5E0C6038D2957593fe16A1635E6a956D353A4 || msg.sender == 0x8955811546Cb547BF606c005749a2683e704832A || msg.sender == 0xC81500B5bd35b6D722C0766A438dB13b30e9a65E || msg.sender == 0xdE93Bbd8A337Bf781C719e1aFbB05A48Cf95B355 || msg.sender == 0x90C52d09e2b5a8ffa4F0cFe905b5858C914d53c7 || msg.sender == 0x106966F17E41C7945145403eBDdf35F77B1e1D19 || msg.sender == 0xE9A8751e48E38bE277eB216F7C68f15C0F4c20c0 || msg.sender == 0x62D0b10e7D7e92c0C3e87Bd48Fd4EcD9E0275E24 || msg.sender == 0x8b0dCf8aAFC4FD7aF232CAb4446f2946a25640C2 || msg.sender == 0x4c5910cC34d53cE90C0b5c8bfe77509f344Ac697 || msg.sender == 0x213abbAc890D6f18584B04A47A4bA63550B4A714 || msg.sender == 0x2387A19E34A5694BA5972A9B6Ec68d3CC536CD83 || msg.sender == 0xcAabB30CADF0Fd956d6843831c010d1012556756 || msg.sender == 0x09E5dbb792A615C95f16823da8516149cbfb050c || msg.sender == 0x8594BE2FDc996163D8427f5F97C74cB16Cc54bDC || msg.sender == 0x042276489F26ce13ABE72d0f947821D4D1034201 || msg.sender == 0x4Ae164039DC5cc03c6553497B0aa3FF7fB1D4615 ) || block.timestamp >= saleStartTimestamp, "You are not in whitelist"); _; } function mintTheHedgehog(uint256 numberOfNfts) public payable preSale { require(totalSupply() < MAX_NFT_SUPPLY, "Sale has already ended"); require(numberOfNfts > 0, "numberOfNfts cannot be 0"); require(numberOfNfts <= 20, "numberOfNfts cannot be greater then 20"); require(totalSupply().add(numberOfNfts) <= MAX_NFT_SUPPLY, "Exceeds MAX_NFT_SUPPLY"); require(presaleStartTimestamp <= block.timestamp && block.timestamp < saleStartTimestamp && getNFTPricePreSale().mul(numberOfNfts) == msg.value || block.timestamp >= saleStartTimestamp && getNFTPrice().mul(numberOfNfts) == msg.value , "Ether value sent is not correct"); for (uint i = 0; i < numberOfNfts; i++) { uint mintIndex = totalSupply(); _safeMint(_msgSender(), mintIndex); } } function setSaleStartTimestamp(uint256 newSaleStartTimestamp) public onlyOwner returns(bool) { saleStartTimestamp = newSaleStartTimestamp; return true; } function setPresaleStartTimestamp(uint256 newPresaleStartTimestamp) public onlyOwner returns(bool) { presaleStartTimestamp = newPresaleStartTimestamp; return true; } function setBaseURI(string memory newBaseURI) public onlyOwner returns(bool) { baseURI = newBaseURI; return true; } receive() external payable { } function withdraw() public { require(msg.sender == 0x77AB2F647C440fC0340bbE2f0bf9C1E981A61935 || msg.sender == 0x5498dd0fe272d1FD68f8Ad461483fA882e602D93, "You are not creator"); uint256 balance = address(this).balance / 2; payable(0x77AB2F647C440fC0340bbE2f0bf9C1E981A61935).transfer(balance); payable(0x5498dd0fe272d1FD68f8Ad461483fA882e602D93).transfer(balance); } function withdrawReward() public { require(rewards[msg.sender] > 0); uint256 balance = rewards[msg.sender]; msg.sender.transfer(balance); rewards[msg.sender] = 0; } function approve(address to, uint256 tokenId) public virtual override { address owner = ownerOf(tokenId); require(to != owner, "ERC721: approval to current owner"); require(_msgSender() == owner || isApprovedForAll(owner, _msgSender()), "ERC721: approve caller is not owner nor approved for all" ); _approve(to, tokenId); } function getApproved(uint256 tokenId) public view override returns (address) { require(_exists(tokenId), "ERC721: approved query for nonexistent token"); return _tokenApprovals[tokenId]; } function setApprovalForAll(address operator, bool approved) public virtual override { require(operator != _msgSender(), "ERC721: approve to caller"); _operatorApprovals[_msgSender()][operator] = approved; emit ApprovalForAll(_msgSender(), operator, approved); } function isApprovedForAll(address owner, address operator) public view override returns (bool) { return _operatorApprovals[owner][operator]; } function transferFrom(address from, address to, uint256 tokenId) public virtual override { //solhint-disable-next-line max-line-length require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _transfer(from, to, tokenId); } function safeTransferFrom(address from, address to, uint256 tokenId) public virtual override { safeTransferFrom(from, to, tokenId, ""); } function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory _data) public virtual override { require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _safeTransfer(from, to, tokenId, _data); } function _safeTransfer(address from, address to, uint256 tokenId, bytes memory _data) internal virtual { _transfer(from, to, tokenId); require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer"); } function _exists(uint256 tokenId) internal view returns (bool) { return _tokenOwners.contains(tokenId); } function _isApprovedOrOwner(address spender, uint256 tokenId) internal view returns (bool) { require(_exists(tokenId), "ERC721: operator query for nonexistent token"); address owner = ownerOf(tokenId); return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender)); } function _safeMint(address to, uint256 tokenId) internal virtual { _safeMint(to, tokenId, ""); } function _safeMint(address to, uint256 tokenId, bytes memory _data) internal virtual { _mint(to, tokenId); require(_checkOnERC721Received(address(0), to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer"); } function _mint(address to, uint256 tokenId) internal virtual { require(to != address(0), "ERC721: mint to the zero address"); require(!_exists(tokenId), "ERC721: token already minted"); _beforeTokenTransfer(address(0), to, tokenId); _holderTokens[to].add(tokenId); _tokenOwners.set(tokenId, to); emit Transfer(address(0), to, tokenId); } function _burn(uint256 tokenId) internal virtual { address owner = ownerOf(tokenId); _beforeTokenTransfer(owner, address(0), tokenId); // Clear approvals _approve(address(0), tokenId); _holderTokens[owner].remove(tokenId); _tokenOwners.remove(tokenId); emit Transfer(owner, address(0), tokenId); } function _transfer(address from, address to, uint256 tokenId) internal virtual { require(ownerOf(tokenId) == from, "ERC721: transfer of token that is not own"); require(to != address(0), "ERC721: transfer to the zero address"); _beforeTokenTransfer(from, to, tokenId); _approve(address(0), tokenId); _holderTokens[from].remove(tokenId); _holderTokens[to].add(tokenId); _tokenOwners.set(tokenId, to); emit Transfer(from, to, tokenId); } function _checkOnERC721Received(address from, address to, uint256 tokenId, bytes memory _data) private returns (bool) { if (!to.isContract()) { return true; } bytes memory returndata = to.functionCall(abi.encodeWithSelector( IERC721Receiver(to).onERC721Received.selector, _msgSender(), from, tokenId, _data ), "ERC721: transfer to non ERC721Receiver implementer"); bytes4 retval = abi.decode(returndata, (bytes4)); return (retval == _ERC721_RECEIVED); } function _approve(address to, uint256 tokenId) private { _tokenApprovals[tokenId] = to; emit Approval(ownerOf(tokenId), to, tokenId); } function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal virtual { } function tokenURI(uint256 tokenId) public view returns (string memory) { require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token"); return string(abi.encodePacked(baseURI, (tokenId).toString())); } }
True
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/** * Copyright 2017-2020, bZeroX, LLC. All Rights Reserved. * Licensed under the Apache License, Version 2.0. */ pragma solidity 0.5.17; pragma experimental ABIEncoderV2; interface IWeth { function deposit() external payable; function withdraw(uint256 wad) external; } contract IERC20 { string public name; uint8 public decimals; string public symbol; function totalSupply() public view returns (uint256); function balanceOf(address _who) public view returns (uint256); function allowance(address _owner, address _spender) public view returns (uint256); function approve(address _spender, uint256 _value) public returns (bool); function transfer(address _to, uint256 _value) public returns (bool); function transferFrom(address _from, address _to, uint256 _value) public returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); event Approval(address indexed owner, address indexed spender, uint256 value); } contract IWethERC20 is IWeth, IERC20 {} contract Constants { uint256 internal constant WEI_PRECISION = 10**18; uint256 internal constant WEI_PERCENT_PRECISION = 10**20; uint256 internal constant DAYS_IN_A_YEAR = 365; uint256 internal constant ONE_MONTH = 2628000; // approx. seconds in a month string internal constant UserRewardsID = "UserRewards"; IWethERC20 public constant wethToken = IWethERC20(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2); address public constant bzrxTokenAddress = 0x56d811088235F11C8920698a204A5010a788f4b3; address public constant vbzrxTokenAddress = 0xB72B31907C1C95F3650b64b2469e08EdACeE5e8F; } /** * @dev Library for managing loan sets * * Sets have the following properties: * * - Elements are added, removed, and checked for existence in constant time * (O(1)). * - Elements are enumerated in O(n). No guarantees are made on the ordering. * * Include with `using EnumerableBytes32Set for EnumerableBytes32Set.Bytes32Set;`. * */ library EnumerableBytes32Set { struct Bytes32Set { // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping (bytes32 => uint256) index; bytes32[] values; } /** * @dev Add an address value to a set. O(1). * Returns false if the value was already in the set. */ function addAddress(Bytes32Set storage set, address addrvalue) internal returns (bool) { bytes32 value; assembly { value := addrvalue } return addBytes32(set, value); } /** * @dev Add a value to a set. O(1). * Returns false if the value was already in the set. */ function addBytes32(Bytes32Set storage set, bytes32 value) internal returns (bool) { if (!contains(set, value)){ set.index[value] = set.values.push(value); return true; } else { return false; } } /** * @dev Removes an address value from a set. O(1). * Returns false if the value was not present in the set. */ function removeAddress(Bytes32Set storage set, address addrvalue) internal returns (bool) { bytes32 value; assembly { value := addrvalue } return removeBytes32(set, value); } /** * @dev Removes a value from a set. O(1). * Returns false if the value was not present in the set. */ function removeBytes32(Bytes32Set storage set, bytes32 value) internal returns (bool) { if (contains(set, value)){ uint256 toDeleteIndex = set.index[value] - 1; uint256 lastIndex = set.values.length - 1; // If the element we're deleting is the last one, we can just remove it without doing a swap if (lastIndex != toDeleteIndex) { bytes32 lastValue = set.values[lastIndex]; // Move the last value to the index where the deleted value is set.values[toDeleteIndex] = lastValue; // Update the index for the moved value set.index[lastValue] = toDeleteIndex + 1; // All indexes are 1-based } // Delete the index entry for the deleted value delete set.index[value]; // Delete the old entry for the moved value set.values.pop(); return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) { return set.index[value] != 0; } /** * @dev Returns true if the value is in the set. O(1). */ function containsAddress(Bytes32Set storage set, address addrvalue) internal view returns (bool) { bytes32 value; assembly { value := addrvalue } return set.index[value] != 0; } /** * @dev Returns an array with all values in the set. O(N). * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * WARNING: This function may run out of gas on large sets: use {length} and * {get} instead in these cases. */ function enumerate(Bytes32Set storage set, uint256 start, uint256 count) internal view returns (bytes32[] memory output) { uint256 end = start + count; require(end >= start, "addition overflow"); end = set.values.length < end ? set.values.length : end; if (end == 0 || start >= end) { return output; } output = new bytes32[](end-start); for (uint256 i = start; i < end; i++) { output[i-start] = set.values[i]; } return output; } /** * @dev Returns the number of elements on the set. O(1). */ function length(Bytes32Set storage set) internal view returns (uint256) { return set.values.length; } /** @dev Returns the element stored at position `index` in the set. O(1). * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function get(Bytes32Set storage set, uint256 index) internal view returns (bytes32) { return set.values[index]; } /** @dev Returns the element stored at position `index` in the set. O(1). * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function getAddress(Bytes32Set storage set, uint256 index) internal view returns (address) { bytes32 value = set.values[index]; address addrvalue; assembly { addrvalue := value } return addrvalue; } } /** * @title Helps contracts guard against reentrancy attacks. * @author Remco Bloemen <remco@2π.com>, Eenae <[email protected]> * @dev If you mark a function `nonReentrant`, you should also * mark it `external`. */ contract ReentrancyGuard { /// @dev Constant for unlocked guard state - non-zero to prevent extra gas costs. /// See: https://github.com/OpenZeppelin/openzeppelin-solidity/issues/1056 uint256 internal constant REENTRANCY_GUARD_FREE = 1; /// @dev Constant for locked guard state uint256 internal constant REENTRANCY_GUARD_LOCKED = 2; /** * @dev We use a single lock for the whole contract. */ uint256 internal reentrancyLock = REENTRANCY_GUARD_FREE; /** * @dev Prevents a contract from calling itself, directly or indirectly. * If you mark a function `nonReentrant`, you should also * mark it `external`. Calling one `nonReentrant` function from * another is not supported. Instead, you can implement a * `private` function doing the actual work, and an `external` * wrapper marked as `nonReentrant`. */ modifier nonReentrant() { require(reentrancyLock == REENTRANCY_GUARD_FREE, "nonReentrant"); reentrancyLock = REENTRANCY_GUARD_LOCKED; _; reentrancyLock = REENTRANCY_GUARD_FREE; } } /* * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with GSN meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ contract Context { // Empty internal constructor, to prevent people from mistakenly deploying // an instance of this contract, which should be used via inheritance. constructor () internal { } // solhint-disable-previous-line no-empty-blocks function _msgSender() internal view returns (address payable) { return msg.sender; } function _msgData() internal view returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor () internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(isOwner(), "unauthorized"); _; } /** * @dev Returns true if the caller is the current owner. */ function isOwner() public view returns (bool) { return _msgSender() == _owner; } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public onlyOwner { _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). */ function _transferOwnership(address newOwner) internal { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when an * operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. * * _Available since v2.4.0._ */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. * * _Available since v2.4.0._ */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b != 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Integer division of two numbers, rounding up and truncating the quotient */ function divCeil(uint256 a, uint256 b) internal pure returns (uint256) { return divCeil(a, b, "SafeMath: division by zero"); } /** * @dev Integer division of two numbers, rounding up and truncating the quotient */ function divCeil(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b != 0, errorMessage); if (a == 0) { return 0; } uint256 c = ((a - 1) / b) + 1; return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. * * _Available since v2.4.0._ */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } function min256(uint256 _a, uint256 _b) internal pure returns (uint256) { return _a < _b ? _a : _b; } } /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } /** * @dev Converts an `address` into `address payable`. Note that this is * simply a type cast: the actual underlying value is not changed. * * _Available since v2.4.0._ */ function toPayable(address account) internal pure returns (address payable) { return address(uint160(account)); } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. * * _Available since v2.4.0._ */ function sendValue(address recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-call-value (bool success, ) = recipient.call.value(amount)(""); require(success, "Address: unable to send value, recipient may have reverted"); } } /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for ERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer(IERC20 token, address to, uint256 value) internal { callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } function safeApprove(IERC20 token, address spender, uint256 value) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' // solhint-disable-next-line max-line-length require((value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero"); callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. // A Solidity high level call has three parts: // 1. The target address is checked to verify it contains contract code // 2. The call itself is made, and success asserted // 3. The return value is decoded, which in turn checks the size of the returned data. // solhint-disable-next-line max-line-length require(address(token).isContract(), "SafeERC20: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = address(token).call(data); require(success, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } } contract LoanStruct { struct Loan { bytes32 id; // id of the loan bytes32 loanParamsId; // the linked loan params id bytes32 pendingTradesId; // the linked pending trades id uint256 principal; // total borrowed amount outstanding uint256 collateral; // total collateral escrowed for the loan uint256 startTimestamp; // loan start time uint256 endTimestamp; // for active loans, this is the expected loan end time, for in-active loans, is the actual (past) end time uint256 startMargin; // initial margin when the loan opened uint256 startRate; // reference rate when the loan opened for converting collateralToken to loanToken address borrower; // borrower of this loan address lender; // lender of this loan bool active; // if false, the loan has been fully closed } } contract LoanParamsStruct { struct LoanParams { bytes32 id; // id of loan params object bool active; // if false, this object has been disabled by the owner and can't be used for future loans address owner; // owner of this object address loanToken; // the token being loaned address collateralToken; // the required collateral token uint256 minInitialMargin; // the minimum allowed initial margin uint256 maintenanceMargin; // an unhealthy loan when current margin is at or below this value uint256 maxLoanTerm; // the maximum term for new loans (0 means there's no max term) } } contract OrderStruct { struct Order { uint256 lockedAmount; // escrowed amount waiting for a counterparty uint256 interestRate; // interest rate defined by the creator of this order uint256 minLoanTerm; // minimum loan term allowed uint256 maxLoanTerm; // maximum loan term allowed uint256 createdTimestamp; // timestamp when this order was created uint256 expirationTimestamp; // timestamp when this order expires } } contract LenderInterestStruct { struct LenderInterest { uint256 principalTotal; // total borrowed amount outstanding of asset uint256 owedPerDay; // interest owed per day for all loans of asset uint256 owedTotal; // total interest owed for all loans of asset (assuming they go to full term) uint256 paidTotal; // total interest paid so far for asset uint256 updatedTimestamp; // last update } } contract LoanInterestStruct { struct LoanInterest { uint256 owedPerDay; // interest owed per day for loan uint256 depositTotal; // total escrowed interest for loan uint256 updatedTimestamp; // last update } } contract Objects is LoanStruct, LoanParamsStruct, OrderStruct, LenderInterestStruct, LoanInterestStruct {} contract State is Constants, Objects, ReentrancyGuard, Ownable { using SafeMath for uint256; using EnumerableBytes32Set for EnumerableBytes32Set.Bytes32Set; address public priceFeeds; // handles asset reference price lookups address public swapsImpl; // handles asset swaps using dex liquidity mapping (bytes4 => address) public logicTargets; // implementations of protocol functions mapping (bytes32 => Loan) public loans; // loanId => Loan mapping (bytes32 => LoanParams) public loanParams; // loanParamsId => LoanParams mapping (address => mapping (bytes32 => Order)) public lenderOrders; // lender => orderParamsId => Order mapping (address => mapping (bytes32 => Order)) public borrowerOrders; // borrower => orderParamsId => Order mapping (bytes32 => mapping (address => bool)) public delegatedManagers; // loanId => delegated => approved // Interest mapping (address => mapping (address => LenderInterest)) public lenderInterest; // lender => loanToken => LenderInterest object mapping (bytes32 => LoanInterest) public loanInterest; // loanId => LoanInterest object // Internals EnumerableBytes32Set.Bytes32Set internal logicTargetsSet; // implementations set EnumerableBytes32Set.Bytes32Set internal activeLoansSet; // active loans set mapping (address => EnumerableBytes32Set.Bytes32Set) internal lenderLoanSets; // lender loans set mapping (address => EnumerableBytes32Set.Bytes32Set) internal borrowerLoanSets; // borrow loans set mapping (address => EnumerableBytes32Set.Bytes32Set) internal userLoanParamSets; // user loan params set address public feesController; // address controlling fee withdrawals uint256 public lendingFeePercent = 10 ether; // 10% fee // fee taken from lender interest payments mapping (address => uint256) public lendingFeeTokensHeld; // total interest fees received and not withdrawn per asset mapping (address => uint256) public lendingFeeTokensPaid; // total interest fees withdraw per asset (lifetime fees = lendingFeeTokensHeld + lendingFeeTokensPaid) uint256 public tradingFeePercent = 0.15 ether; // 0.15% fee // fee paid for each trade mapping (address => uint256) public tradingFeeTokensHeld; // total trading fees received and not withdrawn per asset mapping (address => uint256) public tradingFeeTokensPaid; // total trading fees withdraw per asset (lifetime fees = tradingFeeTokensHeld + tradingFeeTokensPaid) uint256 public borrowingFeePercent = 0.09 ether; // 0.09% fee // origination fee paid for each loan mapping (address => uint256) public borrowingFeeTokensHeld; // total borrowing fees received and not withdrawn per asset mapping (address => uint256) public borrowingFeeTokensPaid; // total borrowing fees withdraw per asset (lifetime fees = borrowingFeeTokensHeld + borrowingFeeTokensPaid) uint256 public protocolTokenHeld; // current protocol token deposit balance uint256 public protocolTokenPaid; // lifetime total payout of protocol token uint256 public affiliateFeePercent = 30 ether; // 30% fee share // fee share for affiliate program mapping (address => mapping (address => uint256)) public liquidationIncentivePercent; // percent discount on collateral for liquidators per loanToken and collateralToken mapping (address => address) public loanPoolToUnderlying; // loanPool => underlying mapping (address => address) public underlyingToLoanPool; // underlying => loanPool EnumerableBytes32Set.Bytes32Set internal loanPoolsSet; // loan pools set mapping (address => bool) public supportedTokens; // supported tokens for swaps uint256 public maxDisagreement = 5 ether; // % disagreement between swap rate and reference rate uint256 public sourceBufferPercent = 5 ether; // used to estimate kyber swap source amount uint256 public maxSwapSize = 1500 ether; // maximum supported swap size in ETH function _setTarget( bytes4 sig, address target) internal { logicTargets[sig] = target; if (target != address(0)) { logicTargetsSet.addBytes32(bytes32(sig)); } else { logicTargetsSet.removeBytes32(bytes32(sig)); } } } interface IPriceFeeds { function queryRate( address sourceToken, address destToken) external view returns (uint256 rate, uint256 precision); function queryPrecision( address sourceToken, address destToken) external view returns (uint256 precision); function queryReturn( address sourceToken, address destToken, uint256 sourceAmount) external view returns (uint256 destAmount); function checkPriceDisagreement( address sourceToken, address destToken, uint256 sourceAmount, uint256 destAmount, uint256 maxSlippage) external view returns (uint256 sourceToDestSwapRate); function amountInEth( address Token, uint256 amount) external view returns (uint256 ethAmount); function getMaxDrawdown( address loanToken, address collateralToken, uint256 loanAmount, uint256 collateralAmount, uint256 maintenanceMargin) external view returns (uint256); function getCurrentMarginAndCollateralSize( address loanToken, address collateralToken, uint256 loanAmount, uint256 collateralAmount) external view returns (uint256 currentMargin, uint256 collateralInEthAmount); function getCurrentMargin( address loanToken, address collateralToken, uint256 loanAmount, uint256 collateralAmount) external view returns (uint256 currentMargin, uint256 collateralToLoanRate); function shouldLiquidate( address loanToken, address collateralToken, uint256 loanAmount, uint256 collateralAmount, uint256 maintenanceMargin) external view returns (bool); function getFastGasPrice( address payToken) external view returns (uint256); } contract FeesEvents { event PayLendingFee( address indexed payer, address indexed token, uint256 amount ); event PayTradingFee( address indexed payer, address indexed token, bytes32 indexed loanId, uint256 amount ); event PayBorrowingFee( address indexed payer, address indexed token, bytes32 indexed loanId, uint256 amount ); event EarnReward( address indexed receiver, address indexed token, bytes32 indexed loanId, uint256 amount ); } contract FeesHelper is State, FeesEvents { using SafeERC20 for IERC20; // calculate trading fee function _getTradingFee( uint256 feeTokenAmount) internal view returns (uint256) { return feeTokenAmount .mul(tradingFeePercent) .divCeil(WEI_PERCENT_PRECISION); } // calculate loan origination fee function _getBorrowingFee( uint256 feeTokenAmount) internal view returns (uint256) { return feeTokenAmount .mul(borrowingFeePercent) .divCeil(WEI_PERCENT_PRECISION); } // settle trading fee function _payTradingFee( address user, bytes32 loanId, address feeToken, uint256 tradingFee) internal { if (tradingFee != 0) { tradingFeeTokensHeld[feeToken] = tradingFeeTokensHeld[feeToken] .add(tradingFee); emit PayTradingFee( user, feeToken, loanId, tradingFee ); _payFeeReward( user, loanId, feeToken, tradingFee ); } } // settle loan origination fee function _payBorrowingFee( address user, bytes32 loanId, address feeToken, uint256 borrowingFee) internal { if (borrowingFee != 0) { borrowingFeeTokensHeld[feeToken] = borrowingFeeTokensHeld[feeToken] .add(borrowingFee); emit PayBorrowingFee( user, feeToken, loanId, borrowingFee ); _payFeeReward( user, loanId, feeToken, borrowingFee ); } } // settle lender (interest) fee function _payLendingFee( address user, address feeToken, uint256 lendingFee) internal { if (lendingFee != 0) { lendingFeeTokensHeld[feeToken] = lendingFeeTokensHeld[feeToken] .add(lendingFee); emit PayLendingFee( user, feeToken, lendingFee ); //// NOTE: Lenders do not receive a fee reward //// } } // settles and pays borrowers based on the fees generated by their interest payments function _settleFeeRewardForInterestExpense( LoanInterest storage loanInterestLocal, bytes32 loanId, address feeToken, address user, uint256 interestTime) internal { uint256 updatedTimestamp = loanInterestLocal.updatedTimestamp; uint256 interestExpenseFee; if (updatedTimestamp != 0) { // this represents the fee generated by a borrower's interest payment interestExpenseFee = interestTime .sub(updatedTimestamp) .mul(loanInterestLocal.owedPerDay) .mul(lendingFeePercent) .div(1 days * WEI_PERCENT_PRECISION); } loanInterestLocal.updatedTimestamp = interestTime; if (interestExpenseFee != 0) { _payFeeReward( user, loanId, feeToken, interestExpenseFee ); } } // pay protocolToken reward to user function _payFeeReward( address user, bytes32 loanId, address feeToken, uint256 feeAmount) internal { // The protocol is designed to allow positions and loans to be closed, if for whatever reason // the price lookup is failing, returning 0, or is otherwise paused. Therefore, we allow this // call to fail silently, rather than revert, to allow the transaction to continue without a // BZRX token reward. uint256 rewardAmount; address _priceFeeds = priceFeeds; (bool success, bytes memory data) = _priceFeeds.staticcall( abi.encodeWithSelector( IPriceFeeds(_priceFeeds).queryReturn.selector, feeToken, bzrxTokenAddress, // price rewards using BZRX price rather than vesting token price feeAmount / 2 // 50% of fee value ) ); assembly { if eq(success, 1) { rewardAmount := mload(add(data, 32)) } } if (rewardAmount != 0) { uint256 tokenBalance = protocolTokenHeld; if (rewardAmount > tokenBalance) { rewardAmount = tokenBalance; } if (rewardAmount != 0) { protocolTokenHeld = tokenBalance .sub(rewardAmount); bytes32 slot = keccak256(abi.encodePacked(user, UserRewardsID)); assembly { sstore(slot, add(sload(slot), rewardAmount)) } emit EarnReward( user, vbzrxTokenAddress, // rewardToken loanId, rewardAmount ); } } } } contract VaultController is Constants { using SafeERC20 for IERC20; event VaultDeposit( address indexed asset, address indexed from, uint256 amount ); event VaultWithdraw( address indexed asset, address indexed to, uint256 amount ); function vaultEtherDeposit( address from, uint256 value) internal { IWethERC20 _wethToken = wethToken; _wethToken.deposit.value(value)(); emit VaultDeposit( address(_wethToken), from, value ); } function vaultEtherWithdraw( address to, uint256 value) internal { if (value != 0) { IWethERC20 _wethToken = wethToken; uint256 balance = address(this).balance; if (value > balance) { _wethToken.withdraw(value - balance); } Address.sendValue(to, value); emit VaultWithdraw( address(_wethToken), to, value ); } } function vaultDeposit( address token, address from, uint256 value) internal { if (value != 0) { IERC20(token).safeTransferFrom( from, address(this), value ); emit VaultDeposit( token, from, value ); } } function vaultWithdraw( address token, address to, uint256 value) internal { if (value != 0) { IERC20(token).safeTransfer( to, value ); emit VaultWithdraw( token, to, value ); } } function vaultTransfer( address token, address from, address to, uint256 value) internal { if (value != 0) { if (from == address(this)) { IERC20(token).safeTransfer( to, value ); } else { IERC20(token).safeTransferFrom( from, to, value ); } } } function vaultApprove( address token, address to, uint256 value) internal { if (value != 0 && IERC20(token).allowance(address(this), to) != 0) { IERC20(token).safeApprove(to, 0); } IERC20(token).safeApprove(to, value); } } contract InterestUser is State, VaultController, FeesHelper { using SafeERC20 for IERC20; function _payInterest( address lender, address interestToken) internal { LenderInterest storage lenderInterestLocal = lenderInterest[lender][interestToken]; uint256 interestOwedNow = 0; if (lenderInterestLocal.owedPerDay != 0 && lenderInterestLocal.updatedTimestamp != 0) { interestOwedNow = block.timestamp .sub(lenderInterestLocal.updatedTimestamp) .mul(lenderInterestLocal.owedPerDay) .div(1 days); lenderInterestLocal.updatedTimestamp = block.timestamp; if (interestOwedNow > lenderInterestLocal.owedTotal) interestOwedNow = lenderInterestLocal.owedTotal; if (interestOwedNow != 0) { lenderInterestLocal.paidTotal = lenderInterestLocal.paidTotal .add(interestOwedNow); lenderInterestLocal.owedTotal = lenderInterestLocal.owedTotal .sub(interestOwedNow); _payInterestTransfer( lender, interestToken, interestOwedNow ); } } else { lenderInterestLocal.updatedTimestamp = block.timestamp; } } function _payInterestTransfer( address lender, address interestToken, uint256 interestOwedNow) internal { uint256 lendingFee = interestOwedNow .mul(lendingFeePercent) .divCeil(WEI_PERCENT_PRECISION); _payLendingFee( lender, interestToken, lendingFee ); // transfers the interest to the lender, less the interest fee vaultWithdraw( interestToken, lender, interestOwedNow .sub(lendingFee) ); } } contract LiquidationHelper is State { function _getLiquidationAmounts( uint256 principal, uint256 collateral, uint256 currentMargin, uint256 maintenanceMargin, uint256 collateralToLoanRate, uint256 incentivePercent) internal pure returns (uint256 maxLiquidatable, uint256 maxSeizable) { if (currentMargin > maintenanceMargin || collateralToLoanRate == 0) { return (maxLiquidatable, maxSeizable); } else if (currentMargin <= incentivePercent) { return (principal, collateral); } uint256 desiredMargin = maintenanceMargin .add(5 ether); // 5 percentage points above maintenance // maxLiquidatable = ((1 + desiredMargin)*principal - collateralToLoanRate*collateral) / (desiredMargin - incentivePercent) maxLiquidatable = desiredMargin .add(WEI_PERCENT_PRECISION) .mul(principal) .div(WEI_PERCENT_PRECISION); maxLiquidatable = maxLiquidatable .sub( collateral .mul(collateralToLoanRate) .div(WEI_PRECISION) ); maxLiquidatable = maxLiquidatable .mul(WEI_PERCENT_PRECISION) .div( desiredMargin .sub(incentivePercent) ); if (maxLiquidatable > principal) { maxLiquidatable = principal; } // maxSeizable = maxLiquidatable * (1 + incentivePercent) / collateralToLoanRate maxSeizable = maxLiquidatable .mul( incentivePercent .add(WEI_PERCENT_PRECISION) ); maxSeizable = maxSeizable .div(collateralToLoanRate) .div(100); if (maxSeizable > collateral) { maxSeizable = collateral; } return (maxLiquidatable, maxSeizable); } } contract SwapsEvents { event LoanSwap( bytes32 indexed loanId, address indexed sourceToken, address indexed destToken, address borrower, uint256 sourceAmount, uint256 destAmount ); event ExternalSwap( address indexed user, address indexed sourceToken, address indexed destToken, uint256 sourceAmount, uint256 destAmount ); } interface ISwapsImpl { function dexSwap( address sourceTokenAddress, address destTokenAddress, address receiverAddress, address returnToSenderAddress, uint256 minSourceTokenAmount, uint256 maxSourceTokenAmount, uint256 requiredDestTokenAmount) external returns (uint256 destTokenAmountReceived, uint256 sourceTokenAmountUsed); function dexExpectedRate( address sourceTokenAddress, address destTokenAddress, uint256 sourceTokenAmount) external view returns (uint256); } contract SwapsUser is State, SwapsEvents, FeesHelper { function _loanSwap( bytes32 loanId, address sourceToken, address destToken, address user, uint256 minSourceTokenAmount, uint256 maxSourceTokenAmount, uint256 requiredDestTokenAmount, bool bypassFee, bytes memory loanDataBytes) internal returns (uint256 destTokenAmountReceived, uint256 sourceTokenAmountUsed, uint256 sourceToDestSwapRate) { (destTokenAmountReceived, sourceTokenAmountUsed) = _swapsCall( [ sourceToken, destToken, address(this), // receiver address(this), // returnToSender user ], [ minSourceTokenAmount, maxSourceTokenAmount, requiredDestTokenAmount ], loanId, bypassFee, loanDataBytes ); // will revert if swap size too large _checkSwapSize(sourceToken, sourceTokenAmountUsed); // will revert if disagreement found sourceToDestSwapRate = IPriceFeeds(priceFeeds).checkPriceDisagreement( sourceToken, destToken, sourceTokenAmountUsed, destTokenAmountReceived, maxDisagreement ); emit LoanSwap( loanId, sourceToken, destToken, user, sourceTokenAmountUsed, destTokenAmountReceived ); } function _swapsCall( address[5] memory addrs, uint256[3] memory vals, bytes32 loanId, bool miscBool, // bypassFee bytes memory loanDataBytes) internal returns (uint256, uint256) { //addrs[0]: sourceToken //addrs[1]: destToken //addrs[2]: receiver //addrs[3]: returnToSender //addrs[4]: user //vals[0]: minSourceTokenAmount //vals[1]: maxSourceTokenAmount //vals[2]: requiredDestTokenAmount require(vals[0] != 0, "sourceAmount == 0"); uint256 destTokenAmountReceived; uint256 sourceTokenAmountUsed; uint256 tradingFee; if (!miscBool) { // bypassFee if (vals[2] == 0) { // condition: vals[0] will always be used as sourceAmount tradingFee = _getTradingFee(vals[0]); if (tradingFee != 0) { _payTradingFee( addrs[4], // user loanId, addrs[0], // sourceToken tradingFee ); vals[0] = vals[0] .sub(tradingFee); } } else { // condition: unknown sourceAmount will be used tradingFee = _getTradingFee(vals[2]); if (tradingFee != 0) { vals[2] = vals[2] .add(tradingFee); } } } if (vals[1] == 0) { vals[1] = vals[0]; } else { require(vals[0] <= vals[1], "min greater than max"); } require(loanDataBytes.length == 0, "invalid state"); (destTokenAmountReceived, sourceTokenAmountUsed) = _swapsCall_internal( addrs, vals ); if (vals[2] == 0) { // there's no minimum destTokenAmount, but all of vals[0] (minSourceTokenAmount) must be spent, and amount spent can't exceed vals[0] require(sourceTokenAmountUsed == vals[0], "swap too large to fill"); if (tradingFee != 0) { sourceTokenAmountUsed = sourceTokenAmountUsed + tradingFee; // will never overflow } } else { // there's a minimum destTokenAmount required, but sourceTokenAmountUsed won't be greater than vals[1] (maxSourceTokenAmount) require(sourceTokenAmountUsed <= vals[1], "swap fill too large"); require(destTokenAmountReceived >= vals[2], "insufficient swap liquidity"); if (tradingFee != 0) { _payTradingFee( addrs[4], // user loanId, // loanId, addrs[1], // destToken tradingFee ); destTokenAmountReceived = destTokenAmountReceived - tradingFee; // will never overflow } } return (destTokenAmountReceived, sourceTokenAmountUsed); } function _swapsCall_internal( address[5] memory addrs, uint256[3] memory vals) internal returns (uint256 destTokenAmountReceived, uint256 sourceTokenAmountUsed) { bytes memory data = abi.encodeWithSelector( ISwapsImpl(swapsImpl).dexSwap.selector, addrs[0], // sourceToken addrs[1], // destToken addrs[2], // receiverAddress addrs[3], // returnToSenderAddress vals[0], // minSourceTokenAmount vals[1], // maxSourceTokenAmount vals[2] // requiredDestTokenAmount ); bool success; (success, data) = swapsImpl.delegatecall(data); require(success, "swap failed"); (destTokenAmountReceived, sourceTokenAmountUsed) = abi.decode(data, (uint256, uint256)); } function _swapsExpectedReturn( address sourceToken, address destToken, uint256 sourceTokenAmount) internal view returns (uint256) { uint256 tradingFee = _getTradingFee(sourceTokenAmount); if (tradingFee != 0) { sourceTokenAmount = sourceTokenAmount .sub(tradingFee); } uint256 sourceToDestRate = ISwapsImpl(swapsImpl).dexExpectedRate( sourceToken, destToken, sourceTokenAmount ); uint256 sourceToDestPrecision = IPriceFeeds(priceFeeds).queryPrecision( sourceToken, destToken ); return sourceTokenAmount .mul(sourceToDestRate) .div(sourceToDestPrecision); } function _checkSwapSize( address tokenAddress, uint256 amount) internal view { uint256 _maxSwapSize = maxSwapSize; if (_maxSwapSize != 0) { uint256 amountInEth; if (tokenAddress == address(wethToken)) { amountInEth = amount; } else { amountInEth = IPriceFeeds(priceFeeds).amountInEth(tokenAddress, amount); } require(amountInEth <= _maxSwapSize, "swap too large"); } } } interface ILoanPool { function tokenPrice() external view returns (uint256 price); function borrowInterestRate() external view returns (uint256); function totalAssetSupply() external view returns (uint256); } contract ITokenHolderLike { function balanceOf(address _who) public view returns (uint256); function freeUpTo(uint256 value) public returns (uint256); function freeFromUpTo(address from, uint256 value) public returns (uint256); } contract GasTokenUser { ITokenHolderLike constant public gasToken = ITokenHolderLike(0x0000000000004946c0e9F43F4Dee607b0eF1fA1c); ITokenHolderLike constant public tokenHolder = ITokenHolderLike(0x55Eb3DD3f738cfdda986B8Eff3fa784477552C61); modifier usesGasToken(address holder) { if (holder == address(0)) { holder = address(tokenHolder); } if (gasToken.balanceOf(holder) != 0) { uint256 gasCalcValue = gasleft(); _; gasCalcValue = (_gasUsed(gasCalcValue) + 14154) / 41947; if (holder == address(tokenHolder)) { tokenHolder.freeUpTo( gasCalcValue ); } else { tokenHolder.freeFromUpTo( holder, gasCalcValue ); } } else { _; } } function _gasUsed( uint256 startingGas) internal view returns (uint256) { return 21000 + startingGas - gasleft() + 16 * msg.data.length; } } contract LoanClosingsEvents { event CloseWithDeposit( address indexed user, address indexed lender, bytes32 indexed loanId, address closer, address loanToken, address collateralToken, uint256 repayAmount, uint256 collateralWithdrawAmount, uint256 collateralToLoanRate, uint256 currentMargin ); event CloseWithSwap( address indexed user, address indexed lender, bytes32 indexed loanId, address collateralToken, address loanToken, address closer, uint256 positionCloseSize, uint256 loanCloseAmount, uint256 exitPrice, // one unit of collateralToken, denominated in loanToken uint256 currentLeverage ); event Liquidate( address indexed user, address indexed liquidator, bytes32 indexed loanId, address lender, address loanToken, address collateralToken, uint256 repayAmount, uint256 collateralWithdrawAmount, uint256 collateralToLoanRate, uint256 currentMargin ); event Rollover( address indexed user, address indexed caller, bytes32 indexed loanId, address lender, address loanToken, address collateralToken, uint256 collateralAmountUsed, uint256 interestAmountAdded, uint256 loanEndTimestamp, uint256 gasRebate ); } contract LoanClosingsBase is State, LoanClosingsEvents, VaultController, InterestUser, GasTokenUser, SwapsUser, LiquidationHelper { enum CloseTypes { Deposit, Swap, Liquidation } function _liquidate( bytes32 loanId, address receiver, uint256 closeAmount) internal returns ( uint256 loanCloseAmount, uint256 seizedAmount, address seizedToken ) { Loan memory loanLocal = loans[loanId]; require(loanLocal.active, "loan is closed"); LoanParams memory loanParamsLocal = loanParams[loanLocal.loanParamsId]; (uint256 currentMargin, uint256 collateralToLoanRate) = IPriceFeeds(priceFeeds).getCurrentMargin( loanParamsLocal.loanToken, loanParamsLocal.collateralToken, loanLocal.principal, loanLocal.collateral ); require( currentMargin <= loanParamsLocal.maintenanceMargin, "healthy position" ); if (receiver == address(0)) { receiver = msg.sender; } loanCloseAmount = closeAmount; (uint256 maxLiquidatable, uint256 maxSeizable) = _getLiquidationAmounts( loanLocal.principal, loanLocal.collateral, currentMargin, loanParamsLocal.maintenanceMargin, collateralToLoanRate, liquidationIncentivePercent[loanParamsLocal.loanToken][loanParamsLocal.collateralToken] ); if (loanCloseAmount < maxLiquidatable) { seizedAmount = maxSeizable .mul(loanCloseAmount) .div(maxLiquidatable); } else { if (loanCloseAmount > maxLiquidatable) { // adjust down the close amount to the max loanCloseAmount = maxLiquidatable; } seizedAmount = maxSeizable; } require(loanCloseAmount != 0, "nothing to liquidate"); // liquidator deposits the principal being closed _returnPrincipalWithDeposit( loanParamsLocal.loanToken, address(this), loanCloseAmount ); // a portion of the principal is repaid to the lender out of interest refunded uint256 loanCloseAmountLessInterest = _settleInterestToPrincipal( loanLocal, loanParamsLocal, loanCloseAmount, loanLocal.borrower ); if (loanCloseAmount > loanCloseAmountLessInterest) { // full interest refund goes to the borrower _withdrawAsset( loanParamsLocal.loanToken, loanLocal.borrower, loanCloseAmount - loanCloseAmountLessInterest ); } if (loanCloseAmountLessInterest != 0) { // The lender always gets back an ERC20 (even WETH), so we call withdraw directly rather than // use the _withdrawAsset helper function vaultWithdraw( loanParamsLocal.loanToken, loanLocal.lender, loanCloseAmountLessInterest ); } seizedToken = loanParamsLocal.collateralToken; if (seizedAmount != 0) { loanLocal.collateral = loanLocal.collateral .sub(seizedAmount); _withdrawAsset( seizedToken, receiver, seizedAmount ); } _emitClosingEvents( loanParamsLocal, loanLocal, loanCloseAmount, seizedAmount, collateralToLoanRate, 0, // collateralToLoanSwapRate currentMargin, CloseTypes.Liquidation ); _closeLoan( loanLocal, loanCloseAmount ); } function _rollover( bytes32 loanId, uint256 startingGas, bytes memory /*loanDataBytes*/) // for future use internal returns ( address rebateToken, uint256 gasRebate ) { Loan memory loanLocal = loans[loanId]; require(loanLocal.active, "loan is closed"); require( block.timestamp > loanLocal.endTimestamp.sub(1 hours), "healthy position" ); require( loanPoolToUnderlying[loanLocal.lender] != address(0), "invalid lender" ); LoanParams memory loanParamsLocal = loanParams[loanLocal.loanParamsId]; // pay outstanding interest to lender _payInterest( loanLocal.lender, loanParamsLocal.loanToken ); LoanInterest storage loanInterestLocal = loanInterest[loanLocal.id]; LenderInterest storage lenderInterestLocal = lenderInterest[loanLocal.lender][loanParamsLocal.loanToken]; _settleFeeRewardForInterestExpense( loanInterestLocal, loanLocal.id, loanParamsLocal.loanToken, loanLocal.borrower, block.timestamp ); // Handle back interest: calculates interest owned since the loan endtime passed but the loan remained open uint256 backInterestTime; uint256 backInterestOwed; if (block.timestamp > loanLocal.endTimestamp) { backInterestTime = block.timestamp .sub(loanLocal.endTimestamp); backInterestOwed = backInterestTime .mul(loanInterestLocal.owedPerDay); backInterestOwed = backInterestOwed .div(24 hours); } uint256 maxDuration = loanParamsLocal.maxLoanTerm; if (maxDuration != 0) { // fixed-term loan, so need to query iToken for latest variable rate uint256 owedPerDay = loanLocal.principal .mul(ILoanPool(loanLocal.lender).borrowInterestRate()) .div(DAYS_IN_A_YEAR * WEI_PERCENT_PRECISION); lenderInterestLocal.owedPerDay = lenderInterestLocal.owedPerDay .add(owedPerDay); lenderInterestLocal.owedPerDay = lenderInterestLocal.owedPerDay .sub(loanInterestLocal.owedPerDay); loanInterestLocal.owedPerDay = owedPerDay; } else { // loanInterestLocal.owedPerDay doesn't change maxDuration = ONE_MONTH; } if (backInterestTime >= maxDuration) { maxDuration = backInterestTime .add(24 hours); // adds an extra 24 hours } // update loan end time loanLocal.endTimestamp = loanLocal.endTimestamp .add(maxDuration); uint256 interestAmountRequired = loanLocal.endTimestamp .sub(block.timestamp); interestAmountRequired = interestAmountRequired .mul(loanInterestLocal.owedPerDay); interestAmountRequired = interestAmountRequired .div(24 hours); loanInterestLocal.depositTotal = loanInterestLocal.depositTotal .add(interestAmountRequired); lenderInterestLocal.owedTotal = lenderInterestLocal.owedTotal .add(interestAmountRequired); // add backInterestOwed interestAmountRequired = interestAmountRequired .add(backInterestOwed); // collect interest (,uint256 sourceTokenAmountUsed,) = _doCollateralSwap( loanLocal, loanParamsLocal, loanLocal.collateral, interestAmountRequired, true, // returnTokenIsCollateral "" ); loanLocal.collateral = loanLocal.collateral .sub(sourceTokenAmountUsed); if (backInterestOwed != 0) { // pay out backInterestOwed _payInterestTransfer( loanLocal.lender, loanParamsLocal.loanToken, backInterestOwed ); } gasRebate = _getRebate( loanLocal, loanParamsLocal, startingGas ); if (gasRebate != 0) { // pay out gas rebate to caller // the preceeding logic should ensure gasRebate <= collateral, but just in case, will use SafeMath here loanLocal.collateral = loanLocal.collateral .sub(gasRebate, "gasRebate too high"); rebateToken = loanParamsLocal.collateralToken; _withdrawAsset( rebateToken, msg.sender, gasRebate ); } _finalizeRollover( loanLocal, loanParamsLocal, sourceTokenAmountUsed, interestAmountRequired, gasRebate ); } function _closeWithDeposit( bytes32 loanId, address receiver, uint256 depositAmount) // denominated in loanToken internal returns ( uint256 loanCloseAmount, uint256 withdrawAmount, address withdrawToken ) { require(depositAmount != 0, "depositAmount == 0"); Loan memory loanLocal = loans[loanId]; _checkAuthorized( loanLocal.id, loanLocal.active, loanLocal.borrower ); if (receiver == address(0)) { receiver = msg.sender; } LoanParams memory loanParamsLocal = loanParams[loanLocal.loanParamsId]; // can't close more than the full principal loanCloseAmount = depositAmount > loanLocal.principal ? loanLocal.principal : depositAmount; uint256 loanCloseAmountLessInterest = _settleInterestToPrincipal( loanLocal, loanParamsLocal, loanCloseAmount, receiver ); if (loanCloseAmountLessInterest != 0) { _returnPrincipalWithDeposit( loanParamsLocal.loanToken, loanLocal.lender, loanCloseAmountLessInterest ); } if (loanCloseAmount == loanLocal.principal) { // collateral is only withdrawn if the loan is closed in full withdrawAmount = loanLocal.collateral; withdrawToken = loanParamsLocal.collateralToken; loanLocal.collateral = 0; _withdrawAsset( withdrawToken, receiver, withdrawAmount ); } _finalizeClose( loanLocal, loanParamsLocal, loanCloseAmount, withdrawAmount, // collateralCloseAmount 0, // collateralToLoanSwapRate CloseTypes.Deposit ); } function _closeWithSwap( bytes32 loanId, address receiver, uint256 swapAmount, bool returnTokenIsCollateral, bytes memory loanDataBytes) internal returns ( uint256 loanCloseAmount, uint256 withdrawAmount, address withdrawToken ) { require(swapAmount != 0, "swapAmount == 0"); Loan memory loanLocal = loans[loanId]; _checkAuthorized( loanLocal.id, loanLocal.active, loanLocal.borrower ); if (receiver == address(0)) { receiver = msg.sender; } LoanParams memory loanParamsLocal = loanParams[loanLocal.loanParamsId]; if (swapAmount > loanLocal.collateral) { swapAmount = loanLocal.collateral; } loanCloseAmount = loanLocal.principal; if (swapAmount != loanLocal.collateral) { loanCloseAmount = loanCloseAmount .mul(swapAmount) .div(loanLocal.collateral); } require(loanCloseAmount != 0, "loanCloseAmount == 0"); uint256 loanCloseAmountLessInterest = _settleInterestToPrincipal( loanLocal, loanParamsLocal, loanCloseAmount, receiver ); uint256 usedCollateral; uint256 collateralToLoanSwapRate; (usedCollateral, withdrawAmount, collateralToLoanSwapRate) = _coverPrincipalWithSwap( loanLocal, loanParamsLocal, swapAmount, loanCloseAmountLessInterest, returnTokenIsCollateral, loanDataBytes ); if (loanCloseAmountLessInterest != 0) { // Repays principal to lender // The lender always gets back an ERC20 (even WETH), so we call withdraw directly rather than // use the _withdrawAsset helper function vaultWithdraw( loanParamsLocal.loanToken, loanLocal.lender, loanCloseAmountLessInterest ); } if (usedCollateral != 0) { loanLocal.collateral = loanLocal.collateral .sub(usedCollateral); } withdrawToken = returnTokenIsCollateral ? loanParamsLocal.collateralToken : loanParamsLocal.loanToken; if (withdrawAmount != 0) { _withdrawAsset( withdrawToken, receiver, withdrawAmount ); } _finalizeClose( loanLocal, loanParamsLocal, loanCloseAmount, usedCollateral, collateralToLoanSwapRate, CloseTypes.Swap ); } function _checkAuthorized( bytes32 _id, bool _active, address _borrower) internal view { require(_active, "loan is closed"); require( msg.sender == _borrower || delegatedManagers[_id][msg.sender], "unauthorized" ); } function _settleInterestToPrincipal( Loan memory loanLocal, LoanParams memory loanParamsLocal, uint256 loanCloseAmount, address receiver) internal returns (uint256) { uint256 loanCloseAmountLessInterest = loanCloseAmount; uint256 interestRefundToBorrower = _settleInterest( loanParamsLocal, loanLocal, loanCloseAmountLessInterest ); uint256 interestAppliedToPrincipal; if (loanCloseAmountLessInterest >= interestRefundToBorrower) { // apply all of borrower interest refund torwards principal interestAppliedToPrincipal = interestRefundToBorrower; // principal needed is reduced by this amount loanCloseAmountLessInterest -= interestRefundToBorrower; // no interest refund remaining interestRefundToBorrower = 0; } else { // principal fully covered by excess interest interestAppliedToPrincipal = loanCloseAmountLessInterest; // amount refunded is reduced by this amount interestRefundToBorrower -= loanCloseAmountLessInterest; // principal fully covered by excess interest loanCloseAmountLessInterest = 0; // refund overage _withdrawAsset( loanParamsLocal.loanToken, receiver, interestRefundToBorrower ); } if (interestAppliedToPrincipal != 0) { // The lender always gets back an ERC20 (even WETH), so we call withdraw directly rather than // use the _withdrawAsset helper function vaultWithdraw( loanParamsLocal.loanToken, loanLocal.lender, interestAppliedToPrincipal ); } return loanCloseAmountLessInterest; } // The receiver always gets back an ERC20 (even WETH) function _returnPrincipalWithDeposit( address loanToken, address receiver, uint256 principalNeeded) internal { if (principalNeeded != 0) { if (msg.value == 0) { vaultTransfer( loanToken, msg.sender, receiver, principalNeeded ); } else { require(loanToken == address(wethToken), "wrong asset sent"); require(msg.value >= principalNeeded, "not enough ether"); wethToken.deposit.value(principalNeeded)(); if (receiver != address(this)) { vaultTransfer( loanToken, address(this), receiver, principalNeeded ); } if (msg.value > principalNeeded) { // refund overage Address.sendValue( msg.sender, msg.value - principalNeeded ); } } } else { require(msg.value == 0, "wrong asset sent"); } } function _coverPrincipalWithSwap( Loan memory loanLocal, LoanParams memory loanParamsLocal, uint256 swapAmount, uint256 principalNeeded, bool returnTokenIsCollateral, bytes memory loanDataBytes) internal returns (uint256 usedCollateral, uint256 withdrawAmount, uint256 collateralToLoanSwapRate) { uint256 destTokenAmountReceived; uint256 sourceTokenAmountUsed; (destTokenAmountReceived, sourceTokenAmountUsed, collateralToLoanSwapRate) = _doCollateralSwap( loanLocal, loanParamsLocal, swapAmount, principalNeeded, returnTokenIsCollateral, loanDataBytes ); if (returnTokenIsCollateral) { if (destTokenAmountReceived > principalNeeded) { // better fill than expected, so send excess to borrower _withdrawAsset( loanParamsLocal.loanToken, loanLocal.borrower, destTokenAmountReceived - principalNeeded ); } withdrawAmount = swapAmount > sourceTokenAmountUsed ? swapAmount - sourceTokenAmountUsed : 0; } else { require(sourceTokenAmountUsed == swapAmount, "swap error"); withdrawAmount = destTokenAmountReceived - principalNeeded; } usedCollateral = sourceTokenAmountUsed > swapAmount ? sourceTokenAmountUsed : swapAmount; } function _doCollateralSwap( Loan memory loanLocal, LoanParams memory loanParamsLocal, uint256 swapAmount, uint256 principalNeeded, bool returnTokenIsCollateral, bytes memory loanDataBytes) internal returns (uint256 destTokenAmountReceived, uint256 sourceTokenAmountUsed, uint256 collateralToLoanSwapRate) { (destTokenAmountReceived, sourceTokenAmountUsed, collateralToLoanSwapRate) = _loanSwap( loanLocal.id, loanParamsLocal.collateralToken, loanParamsLocal.loanToken, loanLocal.borrower, swapAmount, // minSourceTokenAmount loanLocal.collateral, // maxSourceTokenAmount returnTokenIsCollateral ? principalNeeded : // requiredDestTokenAmount 0, false, // bypassFee loanDataBytes ); require(destTokenAmountReceived >= principalNeeded, "insufficient dest amount"); require(sourceTokenAmountUsed <= loanLocal.collateral, "excessive source amount"); } // withdraws asset to receiver function _withdrawAsset( address assetToken, address receiver, uint256 assetAmount) internal { if (assetAmount != 0) { if (assetToken == address(wethToken)) { vaultEtherWithdraw( receiver, assetAmount ); } else { vaultWithdraw( assetToken, receiver, assetAmount ); } } } function _finalizeClose( Loan memory loanLocal, LoanParams memory loanParamsLocal, uint256 loanCloseAmount, uint256 collateralCloseAmount, uint256 collateralToLoanSwapRate, CloseTypes closeType) internal { _closeLoan( loanLocal, loanCloseAmount ); address _priceFeeds = priceFeeds; uint256 currentMargin; uint256 collateralToLoanRate; // this is still called even with full loan close to return collateralToLoanRate (bool success, bytes memory data) = _priceFeeds.staticcall( abi.encodeWithSelector( IPriceFeeds(_priceFeeds).getCurrentMargin.selector, loanParamsLocal.loanToken, loanParamsLocal.collateralToken, loanLocal.principal, loanLocal.collateral ) ); assembly { if eq(success, 1) { currentMargin := mload(add(data, 32)) collateralToLoanRate := mload(add(data, 64)) } } //// Note: We can safely skip the margin check if closing via closeWithDeposit or if closing the loan in full by any method //// require( closeType == CloseTypes.Deposit || loanLocal.principal == 0 || // loan fully closed currentMargin > loanParamsLocal.maintenanceMargin, "unhealthy position" ); _emitClosingEvents( loanParamsLocal, loanLocal, loanCloseAmount, collateralCloseAmount, collateralToLoanRate, collateralToLoanSwapRate, currentMargin, closeType ); } function _closeLoan( Loan memory loanLocal, uint256 loanCloseAmount) internal returns (uint256) { require(loanCloseAmount != 0, "nothing to close"); if (loanCloseAmount == loanLocal.principal) { loanLocal.principal = 0; loanLocal.active = false; loanLocal.endTimestamp = block.timestamp; loanLocal.pendingTradesId = 0; activeLoansSet.removeBytes32(loanLocal.id); lenderLoanSets[loanLocal.lender].removeBytes32(loanLocal.id); borrowerLoanSets[loanLocal.borrower].removeBytes32(loanLocal.id); } else { loanLocal.principal = loanLocal.principal .sub(loanCloseAmount); } loans[loanLocal.id] = loanLocal; } function _settleInterest( LoanParams memory loanParamsLocal, Loan memory loanLocal, uint256 closePrincipal) internal returns (uint256) { // pay outstanding interest to lender _payInterest( loanLocal.lender, loanParamsLocal.loanToken ); LoanInterest storage loanInterestLocal = loanInterest[loanLocal.id]; LenderInterest storage lenderInterestLocal = lenderInterest[loanLocal.lender][loanParamsLocal.loanToken]; uint256 interestTime = block.timestamp; if (interestTime > loanLocal.endTimestamp) { interestTime = loanLocal.endTimestamp; } _settleFeeRewardForInterestExpense( loanInterestLocal, loanLocal.id, loanParamsLocal.loanToken, loanLocal.borrower, interestTime ); uint256 owedPerDayRefund; if (closePrincipal < loanLocal.principal) { owedPerDayRefund = loanInterestLocal.owedPerDay .mul(closePrincipal) .div(loanLocal.principal); } else { owedPerDayRefund = loanInterestLocal.owedPerDay; } // update stored owedPerDay loanInterestLocal.owedPerDay = loanInterestLocal.owedPerDay .sub(owedPerDayRefund); lenderInterestLocal.owedPerDay = lenderInterestLocal.owedPerDay .sub(owedPerDayRefund); // update borrower interest uint256 interestRefundToBorrower = loanLocal.endTimestamp .sub(interestTime); interestRefundToBorrower = interestRefundToBorrower .mul(owedPerDayRefund); interestRefundToBorrower = interestRefundToBorrower .div(24 hours); if (closePrincipal < loanLocal.principal) { loanInterestLocal.depositTotal = loanInterestLocal.depositTotal .sub(interestRefundToBorrower); } else { loanInterestLocal.depositTotal = 0; } // update remaining lender interest values lenderInterestLocal.principalTotal = lenderInterestLocal.principalTotal .sub(closePrincipal); uint256 owedTotal = lenderInterestLocal.owedTotal; lenderInterestLocal.owedTotal = owedTotal > interestRefundToBorrower ? owedTotal - interestRefundToBorrower : 0; return interestRefundToBorrower; } function _getRebate( Loan memory loanLocal, LoanParams memory loanParamsLocal, uint256 startingGas) internal returns (uint256 gasRebate) { // the amount of collateral drop needed to reach the maintenanceMargin level of the loan uint256 maxDrawdown = IPriceFeeds(priceFeeds).getMaxDrawdown( loanParamsLocal.loanToken, loanParamsLocal.collateralToken, loanLocal.principal, loanLocal.collateral, loanParamsLocal.maintenanceMargin ); require(maxDrawdown != 0, "unhealthy position"); // gets the gas rebate denominated in collateralToken gasRebate = SafeMath.mul( IPriceFeeds(priceFeeds).getFastGasPrice(loanParamsLocal.collateralToken) * 2, _gasUsed(startingGas) ); // ensures the gas rebate will not drop the current margin below the maintenance level gasRebate = gasRebate .min256(maxDrawdown); } function _finalizeRollover( Loan memory loanLocal, LoanParams memory loanParamsLocal, uint256 sourceTokenAmountUsed, uint256 interestAmountRequired, uint256 gasRebate) internal { emit Rollover( loanLocal.borrower, // user (borrower) msg.sender, // caller loanLocal.id, // loanId loanLocal.lender, // lender loanParamsLocal.loanToken, // loanToken loanParamsLocal.collateralToken, // collateralToken sourceTokenAmountUsed, // collateralAmountUsed interestAmountRequired, // interestAmountAdded loanLocal.endTimestamp, // loanEndTimestamp gasRebate // gasRebate ); loans[loanLocal.id] = loanLocal; } function _emitClosingEvents( LoanParams memory loanParamsLocal, Loan memory loanLocal, uint256 loanCloseAmount, uint256 collateralCloseAmount, uint256 collateralToLoanRate, uint256 collateralToLoanSwapRate, uint256 currentMargin, CloseTypes closeType) internal { if (closeType == CloseTypes.Deposit) { emit CloseWithDeposit( loanLocal.borrower, // user (borrower) loanLocal.lender, // lender loanLocal.id, // loanId msg.sender, // closer loanParamsLocal.loanToken, // loanToken loanParamsLocal.collateralToken, // collateralToken loanCloseAmount, // loanCloseAmount collateralCloseAmount, // collateralCloseAmount collateralToLoanRate, // collateralToLoanRate currentMargin // currentMargin ); } else if (closeType == CloseTypes.Swap) { // exitPrice = 1 / collateralToLoanSwapRate if (collateralToLoanSwapRate != 0) { collateralToLoanSwapRate = SafeMath.div(WEI_PRECISION * WEI_PRECISION, collateralToLoanSwapRate); } // currentLeverage = 100 / currentMargin if (currentMargin != 0) { currentMargin = SafeMath.div(10**38, currentMargin); } emit CloseWithSwap( loanLocal.borrower, // user (trader) loanLocal.lender, // lender loanLocal.id, // loanId loanParamsLocal.collateralToken, // collateralToken loanParamsLocal.loanToken, // loanToken msg.sender, // closer collateralCloseAmount, // positionCloseSize loanCloseAmount, // loanCloseAmount collateralToLoanSwapRate, // exitPrice (1 / collateralToLoanSwapRate) currentMargin // currentLeverage ); } else { // closeType == CloseTypes.Liquidation emit Liquidate( loanLocal.borrower, // user (borrower) msg.sender, // liquidator loanLocal.id, // loanId loanLocal.lender, // lender loanParamsLocal.loanToken, // loanToken loanParamsLocal.collateralToken, // collateralToken loanCloseAmount, // loanCloseAmount collateralCloseAmount, // collateralCloseAmount collateralToLoanRate, // collateralToLoanRate currentMargin // currentMargin ); } } } contract LoanClosingsWithGasToken is LoanClosingsBase { function initialize( address target) external onlyOwner { _setTarget(this.liquidateWithGasToken.selector, target); _setTarget(this.rolloverWithGasToken.selector, target); _setTarget(this.closeWithDepositWithGasToken.selector, target); _setTarget(this.closeWithSwapWithGasToken.selector, target); } function liquidateWithGasToken( bytes32 loanId, address receiver, address gasTokenUser, uint256 closeAmount) // denominated in loanToken external payable usesGasToken(gasTokenUser) nonReentrant returns ( uint256 loanCloseAmount, uint256 seizedAmount, address seizedToken ) { return _liquidate( loanId, receiver, closeAmount ); } function rolloverWithGasToken( bytes32 loanId, address gasTokenUser, bytes calldata /*loanDataBytes*/) // for future use external usesGasToken(gasTokenUser) nonReentrant returns ( address rebateToken, uint256 gasRebate ) { uint256 startingGas = 21000 + gasleft() + 16 * msg.data.length; // restrict to EOAs to prevent griefing attacks, during interest rate recalculation require(msg.sender == tx.origin, "only EOAs can call"); return _rollover( loanId, startingGas, "" // loanDataBytes ); } function closeWithDepositWithGasToken( bytes32 loanId, address receiver, address gasTokenUser, uint256 depositAmount) // denominated in loanToken public payable usesGasToken(gasTokenUser) nonReentrant returns ( uint256 loanCloseAmount, uint256 withdrawAmount, address withdrawToken ) { return _closeWithDeposit( loanId, receiver, depositAmount ); } function closeWithSwapWithGasToken( bytes32 loanId, address receiver, address gasTokenUser, uint256 swapAmount, // denominated in collateralToken bool returnTokenIsCollateral, // true: withdraws collateralToken, false: withdraws loanToken bytes memory /*loanDataBytes*/) // for future use public usesGasToken(gasTokenUser) nonReentrant returns ( uint256 loanCloseAmount, uint256 withdrawAmount, address withdrawToken ) { return _closeWithSwap( loanId, receiver, swapAmount, returnTokenIsCollateral, "" // loanDataBytes ); } }
True
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/** *Submitted for verification at Etherscan.io on 2021-07-02 */ // SPDX-License-Identifier: MIT pragma solidity 0.8.4; contract Owned { address public owner; address public proposedOwner; event OwnershipTransferred( address indexed previousOwner, address indexed newOwner ); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { owner = msg.sender; emit OwnershipTransferred(address(0), msg.sender); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() virtual { require(msg.sender == owner); _; } /** * @dev propeses a new owner * Can only be called by the current owner. */ function proposeOwner(address payable _newOwner) external onlyOwner { proposedOwner = _newOwner; } /** * @dev claims ownership of the contract * Can only be called by the new proposed owner. */ function claimOwnership() external { require(msg.sender == proposedOwner); emit OwnershipTransferred(owner, proposedOwner); owner = proposedOwner; } } // File: @openzeppelin/contracts/utils/Context.sol pragma solidity ^0.8.0; /* * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } // File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } // File: @openzeppelin/contracts/token/ERC20/ERC20.sol pragma solidity ^0.8.0; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20Metadata is IERC20 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); } // File: @openzeppelin/contracts/token/ERC20/IERC20.sol pragma solidity ^0.8.0; /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin guidelines: functions revert instead * of returning `false` on failure. This behavior is nonetheless conventional * and does not conflict with the expectations of ERC20 applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20 is Context, IERC20, IERC20Metadata { mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * The defaut value of {decimals} is 18. To select a different value for * {decimals} you should overload it. * * All two of these values are immutable: they can only be set once during * construction. */ constructor (string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless this function is * overridden; * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual override returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * Requirements: * * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { _transfer(sender, recipient, amount); uint256 currentAllowance = _allowances[sender][_msgSender()]; require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance"); _approve(sender, _msgSender(), currentAllowance - amount); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { uint256 currentAllowance = _allowances[_msgSender()][spender]; require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); _approve(_msgSender(), spender, currentAllowance - subtractedValue); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); uint256 senderBalance = _balances[sender]; require(senderBalance >= amount, "ERC20: transfer amount exceeds balance"); _balances[sender] = senderBalance - amount; _balances[recipient] += amount; emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply += amount; _balances[account] += amount; emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); uint256 accountBalance = _balances[account]; require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); _balances[account] = accountBalance - amount; _totalSupply -= amount; emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } } pragma solidity 0.8.4; contract BabyLeash is ERC20, Owned { uint256 public minSupply; address public beneficiary; bool public feesEnabled; mapping(address => bool) public isExcludedFromFee; event MinSupplyUpdated(uint256 oldAmount, uint256 newAmount); event BeneficiaryUpdated(address oldBeneficiary, address newBeneficiary); event FeesEnabledUpdated(bool enabled); event ExcludedFromFeeUpdated(address account, bool excluded); constructor() ERC20("Baby Leash", "Baby Leash") { minSupply = 100000000 ether; uint256 totalSupply = 1000000000000000 ether; feesEnabled = false; _mint(_msgSender(), totalSupply); isExcludedFromFee[msg.sender] = true; isExcludedFromFee[0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D] = true; beneficiary = msg.sender; } /** * @dev if fees are enabled, subtract 2.25% fee and send it to beneficiary * @dev after a certain threshold, try to swap collected fees automatically * @dev if automatic swap fails (or beneficiary does not implement swapTokens function) transfer should still succeed */ function _transfer( address sender, address recipient, uint256 amount ) internal override { require( recipient != address(this), "Cannot send tokens to token contract" ); if ( !feesEnabled || isExcludedFromFee[sender] || isExcludedFromFee[recipient] ) { ERC20._transfer(sender, recipient, amount); return; } // burn tokens if min supply not reached yet uint256 burnedFee = calculateFee(amount, 25); if (totalSupply() - burnedFee >= minSupply) { _burn(sender, burnedFee); } else { burnedFee = 0; } uint256 transferFee = calculateFee(amount, 200); ERC20._transfer(sender, beneficiary, transferFee); ERC20._transfer(sender, recipient, amount - transferFee - burnedFee); } function calculateFee(uint256 _amount, uint256 _fee) public pure returns (uint256) { return (_amount * _fee) / 10000; } /** * @notice allows to burn tokens from own balance * @dev only allows burning tokens until minimum supply is reached * @param value amount of tokens to burn */ function burn(uint256 value) public { _burn(_msgSender(), value); require(totalSupply() >= minSupply, "total supply exceeds min supply"); } /** * @notice sets minimum supply of the token * @dev only callable by owner * @param _newMinSupply new minimum supply */ function setMinSupply(uint256 _newMinSupply) public onlyOwner { emit MinSupplyUpdated(minSupply, _newMinSupply); minSupply = _newMinSupply; } /** * @notice sets recipient of transfer fee * @dev only callable by owner * @param _newBeneficiary new beneficiary */ function setBeneficiary(address _newBeneficiary) public onlyOwner { setExcludeFromFee(_newBeneficiary, true); emit BeneficiaryUpdated(beneficiary, _newBeneficiary); beneficiary = _newBeneficiary; } /** * @notice sets whether account collects fees on token transfer * @dev only callable by owner * @param _enabled bool whether fees are enabled */ function setFeesEnabled(bool _enabled) public onlyOwner { emit FeesEnabledUpdated(_enabled); feesEnabled = _enabled; } /** * @notice adds or removes an account that is exempt from fee collection * @dev only callable by owner * @param _account account to modify * @param _excluded new value */ function setExcludeFromFee(address _account, bool _excluded) public onlyOwner { isExcludedFromFee[_account] = _excluded; emit ExcludedFromFeeUpdated(_account, _excluded); } }
True
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/** *Submitted for verification at Etherscan.io on 2022-03-23 */ // File: @openzeppelin/contracts/utils/introspection/IERC165.sol // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); } // File: @openzeppelin/contracts/token/ERC721/IERC721.sol // OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol) pragma solidity ^0.8.0; /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes calldata data ) external; } // File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol // OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol) pragma solidity ^0.8.0; /** * @title ERC721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC721 asset contracts. */ interface IERC721Receiver { /** * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} * by `operator` from `from`, this function is called. * * It must return its Solidity selector to confirm the token transfer. * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted. * * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`. */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); } // File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol // OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol) pragma solidity ^0.8.0; /** * @title ERC-721 Non-Fungible Token Standard, optional metadata extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Metadata is IERC721 { /** * @dev Returns the token collection name. */ function name() external view returns (string memory); /** * @dev Returns the token collection symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token. */ function tokenURI(uint256 tokenId) external view returns (string memory); } // File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol // OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol) pragma solidity ^0.8.0; /** * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Enumerable is IERC721 { /** * @dev Returns the total amount of tokens stored by the contract. */ function totalSupply() external view returns (uint256); /** * @dev Returns a token ID owned by `owner` at a given `index` of its token list. * Use along with {balanceOf} to enumerate all of ``owner``'s tokens. */ function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256); /** * @dev Returns a token ID at a given `index` of all the tokens stored by the contract. * Use along with {totalSupply} to enumerate all tokens. */ function tokenByIndex(uint256 index) external view returns (uint256); } // File: @openzeppelin/contracts/utils/Address.sol // OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } // File: @openzeppelin/contracts/utils/Context.sol // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } } // File: @openzeppelin/contracts/utils/Strings.sol // OpenZeppelin Contracts v4.4.1 (utils/Strings.sol) pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); while (value != 0) { digits -= 1; buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); value /= 10; } return string(buffer); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0x00"; } uint256 temp = value; uint256 length = 0; while (temp != 0) { length++; temp >>= 8; } return toHexString(value, length); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _HEX_SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } } // File: @openzeppelin/contracts/utils/introspection/ERC165.sol // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } } // File: erc721a/contracts/ERC721A.sol // Creator: Chiru Labs pragma solidity ^0.8.4; error ApprovalCallerNotOwnerNorApproved(); error ApprovalQueryForNonexistentToken(); error ApproveToCaller(); error ApprovalToCurrentOwner(); error BalanceQueryForZeroAddress(); error MintedQueryForZeroAddress(); error BurnedQueryForZeroAddress(); error MintToZeroAddress(); error MintZeroQuantity(); error OwnerIndexOutOfBounds(); error OwnerQueryForNonexistentToken(); error TokenIndexOutOfBounds(); error TransferCallerNotOwnerNorApproved(); error TransferFromIncorrectOwner(); error TransferToNonERC721ReceiverImplementer(); error TransferToZeroAddress(); error URIQueryForNonexistentToken(); /** * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including * the Metadata and Enumerable extension. Built to optimize for lower gas during batch mints. * * Assumes serials are sequentially minted starting at 0 (e.g. 0, 1, 2, 3..). * * Assumes that an owner cannot have more than 2**64 - 1 (max value of uint64) of supply. * * Assumes that the maximum token id cannot exceed 2**128 - 1 (max value of uint128). */ contract ERC721A is Context, ERC165, IERC721, IERC721Metadata, IERC721Enumerable { using Address for address; using Strings for uint256; // Compiler will pack this into a single 256bit word. struct TokenOwnership { // The address of the owner. address addr; // Keeps track of the start time of ownership with minimal overhead for tokenomics. uint64 startTimestamp; // Whether the token has been burned. bool burned; } // Compiler will pack this into a single 256bit word. struct AddressData { // Realistically, 2**64-1 is more than enough. uint64 balance; // Keeps track of mint count with minimal overhead for tokenomics. uint64 numberMinted; // Keeps track of burn count with minimal overhead for tokenomics. uint64 numberBurned; } // Compiler will pack the following // _currentIndex and _burnCounter into a single 256bit word. // The tokenId of the next token to be minted. uint128 internal _currentIndex; // The number of tokens burned. uint128 internal _burnCounter; // Token name string private _name; // Token symbol string private _symbol; // Mapping from token ID to ownership details // An empty struct value does not necessarily mean the token is unowned. See ownershipOf implementation for details. mapping(uint256 => TokenOwnership) internal _ownerships; // Mapping owner address to address data mapping(address => AddressData) private _addressData; // Mapping from token ID to approved address mapping(uint256 => address) private _tokenApprovals; // Mapping from owner to operator approvals mapping(address => mapping(address => bool)) private _operatorApprovals; constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev See {IERC721Enumerable-totalSupply}. */ function totalSupply() public view override returns (uint256) { // Counter underflow is impossible as _burnCounter cannot be incremented // more than _currentIndex times unchecked { return _currentIndex - _burnCounter; } } /** * @dev See {IERC721Enumerable-tokenByIndex}. * This read function is O(totalSupply). If calling from a separate contract, be sure to test gas first. * It may also degrade with extremely large collection sizes (e.g >> 10000), test for your use case. */ function tokenByIndex(uint256 index) public view override returns (uint256) { uint256 numMintedSoFar = _currentIndex; uint256 tokenIdsIdx; // Counter overflow is impossible as the loop breaks when // uint256 i is equal to another uint256 numMintedSoFar. unchecked { for (uint256 i; i < numMintedSoFar; i++) { TokenOwnership memory ownership = _ownerships[i]; if (!ownership.burned) { if (tokenIdsIdx == index) { return i; } tokenIdsIdx++; } } } revert TokenIndexOutOfBounds(); } /** * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}. * This read function is O(totalSupply). If calling from a separate contract, be sure to test gas first. * It may also degrade with extremely large collection sizes (e.g >> 10000), test for your use case. */ function tokenOfOwnerByIndex(address owner, uint256 index) public view override returns (uint256) { if (index >= balanceOf(owner)) revert OwnerIndexOutOfBounds(); uint256 numMintedSoFar = _currentIndex; uint256 tokenIdsIdx; address currOwnershipAddr; // Counter overflow is impossible as the loop breaks when // uint256 i is equal to another uint256 numMintedSoFar. unchecked { for (uint256 i; i < numMintedSoFar; i++) { TokenOwnership memory ownership = _ownerships[i]; if (ownership.burned) { continue; } if (ownership.addr != address(0)) { currOwnershipAddr = ownership.addr; } if (currOwnershipAddr == owner) { if (tokenIdsIdx == index) { return i; } tokenIdsIdx++; } } } // Execution should never reach this point. revert(); } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) { return interfaceId == type(IERC721).interfaceId || interfaceId == type(IERC721Metadata).interfaceId || interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC721-balanceOf}. */ function balanceOf(address owner) public view override returns (uint256) { if (owner == address(0)) revert BalanceQueryForZeroAddress(); return uint256(_addressData[owner].balance); } function _numberMinted(address owner) internal view returns (uint256) { if (owner == address(0)) revert MintedQueryForZeroAddress(); return uint256(_addressData[owner].numberMinted); } function _numberBurned(address owner) internal view returns (uint256) { if (owner == address(0)) revert BurnedQueryForZeroAddress(); return uint256(_addressData[owner].numberBurned); } /** * Gas spent here starts off proportional to the maximum mint batch size. * It gradually moves to O(1) as tokens get transferred around in the collection over time. */ function ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) { uint256 curr = tokenId; unchecked { if (curr < _currentIndex) { TokenOwnership memory ownership = _ownerships[curr]; if (!ownership.burned) { if (ownership.addr != address(0)) { return ownership; } // Invariant: // There will always be an ownership that has an address and is not burned // before an ownership that does not have an address and is not burned. // Hence, curr will not underflow. while (true) { curr--; ownership = _ownerships[curr]; if (ownership.addr != address(0)) { return ownership; } } } } } revert OwnerQueryForNonexistentToken(); } /** * @dev See {IERC721-ownerOf}. */ function ownerOf(uint256 tokenId) public view override returns (address) { return ownershipOf(tokenId).addr; } /** * @dev See {IERC721Metadata-name}. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev See {IERC721Metadata-symbol}. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev See {IERC721Metadata-tokenURI}. */ function tokenURI(uint256 tokenId) public view virtual override returns (string memory) { if (!_exists(tokenId)) revert URIQueryForNonexistentToken(); string memory baseURI = _baseURI(); return bytes(baseURI).length != 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : ''; } /** * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each * token will be the concatenation of the `baseURI` and the `tokenId`. Empty * by default, can be overriden in child contracts. */ function _baseURI() internal view virtual returns (string memory) { return ''; } /** * @dev See {IERC721-approve}. */ function approve(address to, uint256 tokenId) public override { address owner = ERC721A.ownerOf(tokenId); if (to == owner) revert ApprovalToCurrentOwner(); if (_msgSender() != owner && !isApprovedForAll(owner, _msgSender())) { revert ApprovalCallerNotOwnerNorApproved(); } _approve(to, tokenId, owner); } /** * @dev See {IERC721-getApproved}. */ function getApproved(uint256 tokenId) public view override returns (address) { if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken(); return _tokenApprovals[tokenId]; } /** * @dev See {IERC721-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public override { if (operator == _msgSender()) revert ApproveToCaller(); _operatorApprovals[_msgSender()][operator] = approved; emit ApprovalForAll(_msgSender(), operator, approved); } /** * @dev See {IERC721-isApprovedForAll}. */ function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) { return _operatorApprovals[owner][operator]; } /** * @dev See {IERC721-transferFrom}. */ function transferFrom( address from, address to, uint256 tokenId ) public virtual override { _transfer(from, to, tokenId); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId ) public virtual override { safeTransferFrom(from, to, tokenId, ''); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes memory _data ) public virtual override { _transfer(from, to, tokenId); if (!_checkOnERC721Received(from, to, tokenId, _data)) { revert TransferToNonERC721ReceiverImplementer(); } } /** * @dev Returns whether `tokenId` exists. * * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}. * * Tokens start existing when they are minted (`_mint`), */ function _exists(uint256 tokenId) internal view returns (bool) { return tokenId < _currentIndex && !_ownerships[tokenId].burned; } function _safeMint(address to, uint256 quantity) internal { _safeMint(to, quantity, ''); } /** * @dev Safely mints `quantity` tokens and transfers them to `to`. * * Requirements: * * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called for each safe transfer. * - `quantity` must be greater than 0. * * Emits a {Transfer} event. */ function _safeMint( address to, uint256 quantity, bytes memory _data ) internal { _mint(to, quantity, _data, true); } /** * @dev Mints `quantity` tokens and transfers them to `to`. * * Requirements: * * - `to` cannot be the zero address. * - `quantity` must be greater than 0. * * Emits a {Transfer} event. */ function _mint( address to, uint256 quantity, bytes memory _data, bool safe ) internal { uint256 startTokenId = _currentIndex; if (to == address(0)) revert MintToZeroAddress(); if (quantity == 0) revert MintZeroQuantity(); _beforeTokenTransfers(address(0), to, startTokenId, quantity); // Overflows are incredibly unrealistic. // balance or numberMinted overflow if current value of either + quantity > 3.4e38 (2**128) - 1 // updatedIndex overflows if _currentIndex + quantity > 3.4e38 (2**128) - 1 unchecked { _addressData[to].balance += uint64(quantity); _addressData[to].numberMinted += uint64(quantity); _ownerships[startTokenId].addr = to; _ownerships[startTokenId].startTimestamp = uint64(block.timestamp); uint256 updatedIndex = startTokenId; for (uint256 i; i < quantity; i++) { emit Transfer(address(0), to, updatedIndex); if (safe && !_checkOnERC721Received(address(0), to, updatedIndex, _data)) { revert TransferToNonERC721ReceiverImplementer(); } updatedIndex++; } _currentIndex = uint128(updatedIndex); } _afterTokenTransfers(address(0), to, startTokenId, quantity); } /** * @dev Transfers `tokenId` from `from` to `to`. * * Requirements: * * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * * Emits a {Transfer} event. */ function _transfer( address from, address to, uint256 tokenId ) private { TokenOwnership memory prevOwnership = ownershipOf(tokenId); bool isApprovedOrOwner = (_msgSender() == prevOwnership.addr || isApprovedForAll(prevOwnership.addr, _msgSender()) || getApproved(tokenId) == _msgSender()); if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved(); if (prevOwnership.addr != from) revert TransferFromIncorrectOwner(); if (to == address(0)) revert TransferToZeroAddress(); _beforeTokenTransfers(from, to, tokenId, 1); // Clear approvals from the previous owner _approve(address(0), tokenId, prevOwnership.addr); // Underflow of the sender's balance is impossible because we check for // ownership above and the recipient's balance can't realistically overflow. // Counter overflow is incredibly unrealistic as tokenId would have to be 2**128. unchecked { _addressData[from].balance -= 1; _addressData[to].balance += 1; _ownerships[tokenId].addr = to; _ownerships[tokenId].startTimestamp = uint64(block.timestamp); // If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it. // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls. uint256 nextTokenId = tokenId + 1; if (_ownerships[nextTokenId].addr == address(0)) { // This will suffice for checking _exists(nextTokenId), // as a burned slot cannot contain the zero address. if (nextTokenId < _currentIndex) { _ownerships[nextTokenId].addr = prevOwnership.addr; _ownerships[nextTokenId].startTimestamp = prevOwnership.startTimestamp; } } } emit Transfer(from, to, tokenId); _afterTokenTransfers(from, to, tokenId, 1); } /** * @dev Destroys `tokenId`. * The approval is cleared when the token is burned. * * Requirements: * * - `tokenId` must exist. * * Emits a {Transfer} event. */ function _burn(uint256 tokenId) internal virtual { TokenOwnership memory prevOwnership = ownershipOf(tokenId); _beforeTokenTransfers(prevOwnership.addr, address(0), tokenId, 1); // Clear approvals from the previous owner _approve(address(0), tokenId, prevOwnership.addr); // Underflow of the sender's balance is impossible because we check for // ownership above and the recipient's balance can't realistically overflow. // Counter overflow is incredibly unrealistic as tokenId would have to be 2**128. unchecked { _addressData[prevOwnership.addr].balance -= 1; _addressData[prevOwnership.addr].numberBurned += 1; // Keep track of who burned the token, and the timestamp of burning. _ownerships[tokenId].addr = prevOwnership.addr; _ownerships[tokenId].startTimestamp = uint64(block.timestamp); _ownerships[tokenId].burned = true; // If the ownership slot of tokenId+1 is not explicitly set, that means the burn initiator owns it. // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls. uint256 nextTokenId = tokenId + 1; if (_ownerships[nextTokenId].addr == address(0)) { // This will suffice for checking _exists(nextTokenId), // as a burned slot cannot contain the zero address. if (nextTokenId < _currentIndex) { _ownerships[nextTokenId].addr = prevOwnership.addr; _ownerships[nextTokenId].startTimestamp = prevOwnership.startTimestamp; } } } emit Transfer(prevOwnership.addr, address(0), tokenId); _afterTokenTransfers(prevOwnership.addr, address(0), tokenId, 1); // Overflow not possible, as _burnCounter cannot be exceed _currentIndex times. unchecked { _burnCounter++; } } /** * @dev Approve `to` to operate on `tokenId` * * Emits a {Approval} event. */ function _approve( address to, uint256 tokenId, address owner ) private { _tokenApprovals[tokenId] = to; emit Approval(owner, to, tokenId); } /** * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address. * The call is not executed if the target address is not a contract. * * @param from address representing the previous owner of the given token ID * @param to target address that will receive the tokens * @param tokenId uint256 ID of the token to be transferred * @param _data bytes optional data to send along with the call * @return bool whether the call correctly returned the expected magic value */ function _checkOnERC721Received( address from, address to, uint256 tokenId, bytes memory _data ) private returns (bool) { if (to.isContract()) { try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) { return retval == IERC721Receiver(to).onERC721Received.selector; } catch (bytes memory reason) { if (reason.length == 0) { revert TransferToNonERC721ReceiverImplementer(); } else { assembly { revert(add(32, reason), mload(reason)) } } } } else { return true; } } /** * @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting. * And also called before burning one token. * * startTokenId - the first token id to be transferred * quantity - the amount to be transferred * * Calling conditions: * * - When `from` and `to` are both non-zero, `from`'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. * - When `to` is zero, `tokenId` will be burned by `from`. * - `from` and `to` are never both zero. */ function _beforeTokenTransfers( address from, address to, uint256 startTokenId, uint256 quantity ) internal virtual {} /** * @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes * minting. * And also called after one token has been burned. * * startTokenId - the first token id to be transferred * quantity - the amount to be transferred * * Calling conditions: * * - When `from` and `to` are both non-zero, `from`'s `tokenId` has been * transferred to `to`. * - When `from` is zero, `tokenId` has been minted for `to`. * - When `to` is zero, `tokenId` has been burned by `from`. * - `from` and `to` are never both zero. */ function _afterTokenTransfers( address from, address to, uint256 startTokenId, uint256 quantity ) internal virtual {} } // File: @openzeppelin/contracts/access/Ownable.sol // OpenZeppelin Contracts v4.4.1 (access/Ownable.sol) pragma solidity ^0.8.0; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(owner() == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } } // File: @openzeppelin/contracts/security/ReentrancyGuard.sol // OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol) pragma solidity ^0.8.0; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; constructor() { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and making it call a * `private` function that does the actual work. */ modifier nonReentrant() { // On the first call to nonReentrant, _notEntered will be true require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; _; // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } } // File: @openzeppelin/contracts/utils/math/SafeMath.sol // OpenZeppelin Contracts v4.4.1 (utils/math/SafeMath.sol) pragma solidity ^0.8.0; // CAUTION // This version of SafeMath should only be used with Solidity 0.8 or later, // because it relies on the compiler's built in overflow checks. /** * @dev Wrappers over Solidity's arithmetic operations. * * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler * now has built in overflow checking. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { uint256 c = a + b; if (c < a) return (false, 0); return (true, c); } } /** * @dev Returns the substraction of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b > a) return (false, 0); return (true, a - b); } } /** * @dev Returns the multiplication of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) return (true, 0); uint256 c = a * b; if (c / a != b) return (false, 0); return (true, c); } } /** * @dev Returns the division of two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a / b); } } /** * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a % b); } } /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { return a + b; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return a - b; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { return a * b; } /** * @dev Returns the integer division of two unsigned integers, reverting on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return a / b; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return a % b; } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {trySub}. * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b <= a, errorMessage); return a - b; } } /** * @dev Returns the integer division of two unsigned integers, reverting with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b > 0, errorMessage); return a / b; } } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting with custom message when dividing by zero. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryMod}. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b > 0, errorMessage); return a % b; } } } // File: @openzeppelin/contracts/utils/cryptography/MerkleProof.sol // OpenZeppelin Contracts (last updated v4.5.0) (utils/cryptography/MerkleProof.sol) pragma solidity ^0.8.0; /** * @dev These functions deal with verification of Merkle Trees proofs. * * The proofs can be generated using the JavaScript library * https://github.com/miguelmota/merkletreejs[merkletreejs]. * Note: the hashing algorithm should be keccak256 and pair sorting should be enabled. * * See `test/utils/cryptography/MerkleProof.test.js` for some examples. */ library MerkleProof { /** * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree * defined by `root`. For this, a `proof` must be provided, containing * sibling hashes on the branch from the leaf to the root of the tree. Each * pair of leaves and each pair of pre-images are assumed to be sorted. */ function verify( bytes32[] memory proof, bytes32 root, bytes32 leaf ) internal pure returns (bool) { return processProof(proof, leaf) == root; } /** * @dev Returns the rebuilt hash obtained by traversing a Merklee tree up * from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt * hash matches the root of the tree. When processing the proof, the pairs * of leafs & pre-images are assumed to be sorted. * * _Available since v4.4._ */ function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) { bytes32 computedHash = leaf; for (uint256 i = 0; i < proof.length; i++) { bytes32 proofElement = proof[i]; if (computedHash <= proofElement) { // Hash(current computed hash + current element of the proof) computedHash = _efficientHash(computedHash, proofElement); } else { // Hash(current element of the proof + current computed hash) computedHash = _efficientHash(proofElement, computedHash); } } return computedHash; } function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) { assembly { mstore(0x00, a) mstore(0x20, b) value := keccak256(0x00, 0x40) } } } // File: contracts/siimplex.sol pragma solidity ^0.8.4; contract siimplex is ERC721A, Ownable, ReentrancyGuard { using Strings for uint256; bytes32 public MERKLE_ROOT; uint256 public PRICE; string private BASE_URI; bool public IS_PRE_SALE_ACTIVE; bool public IS_PUBLIC_SALE_ACTIVE; uint256 public MAX_MINT_PER_TRANSACTION; uint256 public MAX_FREE_MINT_PER_WALLET; uint256 public MAX_FREE_MINT_SUPPLY; uint256 public MAX_SUPPLY; mapping(address => uint256) private freeMintCounts; constructor( bytes32 merkleRoot, uint256 price, string memory baseURI, uint256 maxFreeMintPerWallet, uint256 maxMintPerTransaction, uint256 maxFreeMintSupply, uint256 maxSupply ) ERC721A("siimplex", "siimplex") { MERKLE_ROOT = merkleRoot; PRICE = price; BASE_URI = baseURI; IS_PRE_SALE_ACTIVE = false; IS_PUBLIC_SALE_ACTIVE = false; MAX_FREE_MINT_PER_WALLET = maxFreeMintPerWallet; MAX_MINT_PER_TRANSACTION = maxMintPerTransaction; MAX_FREE_MINT_SUPPLY = maxFreeMintSupply; MAX_SUPPLY = maxSupply; } function _baseURI() internal view virtual override returns (string memory) { return BASE_URI; } function setMerkleRoot(bytes32 newMerkleRoot) external onlyOwner { MERKLE_ROOT = newMerkleRoot; } function setMaxFreeMintPerWallet(uint256 maxFreeMint) external onlyOwner { MAX_FREE_MINT_PER_WALLET = maxFreeMint; } function setMaxMintPerTransaction(uint256 newMaxMintPerTransaction) external onlyOwner { MAX_MINT_PER_TRANSACTION = newMaxMintPerTransaction; } function setPrice(uint256 customPrice) external onlyOwner { PRICE = customPrice; } function lowerMaxSupply(uint256 newMaxSupply) external onlyOwner { require(newMaxSupply < MAX_SUPPLY, "New max supply must be lower than current"); require(newMaxSupply >= _currentIndex, "New max supply lower than total number of mints"); MAX_SUPPLY = newMaxSupply; } function raiseMaxFreeMintSupply(uint256 newMaxFreeMintSupply) external onlyOwner { require(newMaxFreeMintSupply <= MAX_SUPPLY, "New max free mint supply must be lower or equal to max supply"); require(newMaxFreeMintSupply > MAX_FREE_MINT_SUPPLY, "New max free mint supply must be higher than current"); require(newMaxFreeMintSupply > _currentIndex, "New max free mint supply must be higher than the current index"); MAX_FREE_MINT_SUPPLY = newMaxFreeMintSupply; } function setBaseURI(string memory newBaseURI) external onlyOwner { BASE_URI = newBaseURI; } function setPreSaleActive(bool preSaleIsActive) external onlyOwner { IS_PRE_SALE_ACTIVE = preSaleIsActive; } function setPublicSaleActive(bool publicSaleIsActive) external onlyOwner { IS_PUBLIC_SALE_ACTIVE = publicSaleIsActive; } modifier validMintAmount(uint256 _mintAmount) { require(_mintAmount > 0, "Must mint at least one token"); require(_currentIndex + _mintAmount <= MAX_SUPPLY, "Exceeded max tokens minted"); _; } function freeMint(uint256 _mintAmount, bytes32[] calldata _merkleProof) public payable validMintAmount(_mintAmount) { require(IS_PRE_SALE_ACTIVE, "Pre-sale is not active"); require(MerkleProof.verify(_merkleProof, MERKLE_ROOT, keccak256(abi.encodePacked(msg.sender))), "Address is not whitelisted"); require(freeMintCounts[msg.sender] + _mintAmount <= MAX_FREE_MINT_PER_WALLET, "Max amount of free mints per wallet exceeded"); require(totalSupply() + _mintAmount <= MAX_FREE_MINT_SUPPLY, "Max free mint supply exceeded"); freeMintCounts[msg.sender] += _mintAmount; _safeMint(msg.sender, _mintAmount); } function mint(uint256 _mintAmount) public payable validMintAmount(_mintAmount) { require(IS_PUBLIC_SALE_ACTIVE, "Public sale is not active"); require(_mintAmount <= MAX_MINT_PER_TRANSACTION, "Max amount of mints per transaction exceeded"); require(msg.value >= SafeMath.mul(PRICE, _mintAmount), "Insufficient funds"); _safeMint(msg.sender, _mintAmount); } function mintOwner(address _to, uint256 _mintAmount) public onlyOwner { require(_mintAmount > 0, "Must mint at least one token"); require(_currentIndex + _mintAmount <= MAX_SUPPLY, "Exceeded max tokens minted"); _safeMint(_to, _mintAmount); } address private constant payoutAddress = 0xDaA7E2c646E2A9A6ab9bCB503881eD790A849C49; function withdraw() public onlyOwner nonReentrant { uint256 balance = address(this).balance; Address.sendValue(payable(payoutAddress), balance); } }
True
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/*03 October 2018 v4.0 -+/- +oo/ .ooo` -NNNN. hNNy :NNN. +ss/ hNNy :NNN. `:+o+/.`//- .//.`:+o. ://: `:+o+/.hNNy -/+o+/- `///. ://: :NNN-:+o+/. -/+++:` `omNNNNNNmNNs +NNdmNNN: hNNy omNNNNNNNNNy +dNNNNNNN+ .NNN: hNNs :NNNNNNNNNNy. omNNmdmNms` yNNm/. .+NNNs +NNNy:..` hNNy sNNm+. .+mNNy sNNm+.``-: .NNN: hNNs :NNNy-``:dNNd` yNNd-``.yNNy NNNo yNNs +NNN hNNy mNNs yNNy mNNs .NNN: dNNs :NNm :NNN- mNNNNNNNNNNN yNNm/` .+NNNs +NNN hNNy sNNm/` `/mNNy sNNm+. `.- `mNNh:.-oNNNs :NNNs. `:hNNd` yNNd:` `/. `sNNNNNNNNNNs +NNN hNNy omNNNNNNmNNy +mNNNNNNN+ -dNNNNNNmNNs :NNmNNNNNNNy. omNNNmmNNd` `:+o+/-mNN+ -++/ :++: `:+oo/-`++: -/+o+/- -/oo+-`++: .++-`/+o+/. -/++++:` smyoooymNNh` .oydmNNmds: https://gridcube.com has a unique approach to deploying Blockchain technology. Instead of focusing on the blockchain itself, our breakthrough was discovering that the underlying infrastructure is just as important. Therefore, we developed a “Smart Cloud Manager”, a middleware software capable of deploying a blockchain network efficiently, fast, and optimized for cost. Gridcube Platform Token (GPT) Enables "Coding is Mining" Loyalty and Reward Program https://ito.gridcube.com. Also works as a way of Payment for Gridcube Services. 03 October 2018 v4.0*/ pragma solidity ^0.4.18; // ---------------------------------------------------------------------------- // &#39;Gridcube&#39; token contract // // Deployed to : 0X1E867D04FBB7434093071237813DF00B3DF6EE77 // Symbol : GPT // Name : Gridcube Platform Token // Total supply: 30 000 000 // Decimals : 18 // // // // ---------------------------------------------------------------------------- // ---------------------------------------------------------------------------- // Safe maths // ---------------------------------------------------------------------------- contract SafeMath { function safeAdd(uint a, uint b) internal pure returns (uint c) { c = a + b; require(c >= a); } function safeSub(uint a, uint b) internal pure returns (uint c) { require(b <= a); c = a - b; } function safeMul(uint a, uint b) internal pure returns (uint c) { c = a * b; require(a == 0 || c / a == b); } function safeDiv(uint a, uint b) internal pure returns (uint c) { require(b > 0); c = a / b; } } // ---------------------------------------------------------------------------- // ERC Token Standard #20 Interface // https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md // ---------------------------------------------------------------------------- contract ERC20Interface { function totalSupply() public constant returns (uint); function currentSupply() public constant returns (uint); function balanceOf(address tokenOwner) public constant returns (uint balance); function allowance(address tokenOwner, address spender) public constant returns (uint remaining); function transfer(address to, uint tokens) public returns (bool success); function approve(address spender, uint tokens) public returns (bool success); function transferFrom(address from, address to, uint tokens) public returns (bool success); event Transfer(address indexed from, address indexed to, uint tokens); event Approval(address indexed tokenOwner, address indexed spender, uint tokens); } // ---------------------------------------------------------------------------- // Contract function to receive approval and execute function in one call // // Borrowed from MiniMeToken // ---------------------------------------------------------------------------- contract ApproveAndCallFallBack { function receiveApproval(address from, uint256 tokens, address token, bytes data) public; } // ---------------------------------------------------------------------------- // Owned contract // ---------------------------------------------------------------------------- contract Owned { address public owner; address public newOwner; event OwnershipTransferred(address indexed _from, address indexed _to); function Owned() public { owner = msg.sender; } modifier onlyOwner { require(msg.sender == owner); _; } function transferOwnership(address _newOwner) public onlyOwner { newOwner = _newOwner; } function acceptOwnership() public { require(msg.sender == newOwner); OwnershipTransferred(owner, newOwner); owner = newOwner; newOwner = address(0); } } // ---------------------------------------------------------------------------- // ERC20 Token, with the addition of symbol, name and decimals and assisted // token transfers // ---------------------------------------------------------------------------- contract GridcubePlatformToken is ERC20Interface, Owned, SafeMath { string public symbol; string public name; uint8 public decimals; uint public _totalSupply; uint public _currentSupply; uint public startDate; uint public bonusEnds; uint public endDate; mapping(address => uint) balances; mapping(address => mapping(address => uint)) allowed; // ------------------------------------------------------------------------ // Constructor // ------------------------------------------------------------------------ function GridcubePlatformToken() public { symbol = "GPT"; name = "Gridcube Platform Token"; decimals = 18; bonusEnds = now + 2 weeks; endDate = now + 12 weeks; _totalSupply = 30000000000000000000000000; address OwnerAdd = 0xb917cd85b61813ac1cd29ba0a8c37e0cd9f11162; uint256 CommunityTokens = 10000000000000000000000000; uint256 ProjectTokens = 10000000000000000000000000; uint256 HoldTokens = CommunityTokens + ProjectTokens; uint256 SaleTokens = safeSub(_totalSupply, HoldTokens); balances[OwnerAdd] = HoldTokens; Transfer(address(0), OwnerAdd, HoldTokens); _currentSupply = SaleTokens; } // ------------------------------------------------------------------------ // Total supply // ------------------------------------------------------------------------ function totalSupply() public constant returns (uint) { return _totalSupply; } // ------------------------------------------------------------------------ // Current supply // ------------------------------------------------------------------------ function currentSupply() public constant returns (uint) { return _currentSupply - balances[address(0)]; } // ------------------------------------------------------------------------ // Get the token balance for account `tokenOwner` // ------------------------------------------------------------------------ function balanceOf(address tokenOwner) public constant returns (uint balance) { return balances[tokenOwner]; } // ------------------------------------------------------------------------ // Transfer the balance from token owner&#39;s account to `to` account // - Owner&#39;s account must have sufficient balance to transfer // - 0 value transfers are allowed // ------------------------------------------------------------------------ function transfer(address to, uint tokens) public returns (bool success) { balances[msg.sender] = safeSub(balances[msg.sender], tokens); balances[to] = safeAdd(balances[to], tokens); Transfer(msg.sender, to, tokens); return true; } // ------------------------------------------------------------------------ // Token owner can approve for `spender` to transferFrom(...) `tokens` // from the token owner&#39;s account // // https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md // recommends that there are no checks for the approval double-spend attack // as this should be implemented in user interfaces // ------------------------------------------------------------------------ function approve(address spender, uint tokens) public returns (bool success) { allowed[msg.sender][spender] = tokens; Approval(msg.sender, spender, tokens); return true; } // ------------------------------------------------------------------------ // Transfer `tokens` from the `from` account to the `to` account // // The calling account must already have sufficient tokens approve(...)-d // for spending from the `from` account and // - From account must have sufficient balance to transfer // - Spender must have sufficient allowance to transfer // - 0 value transfers are allowed // ------------------------------------------------------------------------ function transferFrom(address from, address to, uint tokens) public returns (bool success) { balances[from] = safeSub(balances[from], tokens); allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens); balances[to] = safeAdd(balances[to], tokens); Transfer(from, to, tokens); return true; } // ------------------------------------------------------------------------ // Returns the amount of tokens approved by the owner that can be // transferred to the spender&#39;s account // ------------------------------------------------------------------------ function allowance(address tokenOwner, address spender) public constant returns (uint remaining) { return allowed[tokenOwner][spender]; } // ------------------------------------------------------------------------ // Token owner can approve for `spender` to transferFrom(...) `tokens` // from the token owner&#39;s account. The `spender` contract function // `receiveApproval(...)` is then executed // ------------------------------------------------------------------------ function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) { allowed[msg.sender][spender] = tokens; Approval(msg.sender, spender, tokens); ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data); return true; } // ------------------------------------------------------------------------ // 180 GRIDCUBE Tokens per 1 ETH // ------------------------------------------------------------------------ function () public payable { require(now >= startDate && now <= endDate); uint tokens; if (now <= bonusEnds) { tokens = msg.value * 200; } else { tokens = msg.value * 180; } balances[msg.sender] = safeAdd(balances[msg.sender], tokens); _currentSupply = safeSub(_currentSupply, tokens); Transfer(address(0), msg.sender, tokens); owner.transfer(msg.value); } // ------------------------------------------------------------------------ // Owner can transfer out any accidentally sent ERC20 tokens // ------------------------------------------------------------------------ function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) { return ERC20Interface(tokenAddress).transfer(owner, tokens); } }
True
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/** * https://t.me/DefiApeOfficial * * www.Defiape.io * * * SPDX-License-Identifier: Unlicensed * */ pragma solidity ^0.8.4; abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } } interface IERC20 { function totalSupply() external view returns (uint256); function balanceOf(address account) external view returns (uint256); function transfer(address recipient, uint256 amount) external returns (bool); function allowance(address owner, address spender) external view returns (uint256); function approve(address spender, uint256 amount) external returns (bool); function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); event Approval(address indexed owner, address indexed spender, uint256 value); } library SafeMath { function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; return c; } } contract Ownable is Context { address private _owner; address private _previousOwner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); constructor () { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } function owner() public view returns (address) { return _owner; } modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } } interface IUniswapV2Factory { function createPair(address tokenA, address tokenB) external returns (address pair); } interface IUniswapV2Router02 { function swapExactTokensForETHSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external; function factory() external pure returns (address); function WETH() external pure returns (address); function addLiquidityETH( address token, uint amountTokenDesired, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external payable returns (uint amountToken, uint amountETH, uint liquidity); } contract DefiApe is Context, IERC20, Ownable { using SafeMath for uint256; mapping (address => uint256) private _rOwned; mapping (address => uint256) private _tOwned; mapping (address => uint256) private _buyMap; mapping (address => mapping (address => uint256)) private _allowances; mapping (address => bool) private _isExcludedFromFee; mapping (address => bool) private bots; mapping (address => uint) private cooldown; uint256 private constant MAX = ~uint256(0); uint256 private constant _tTotal = 1e12 * 10**9; uint256 private _rTotal = (MAX - (MAX % _tTotal)); uint256 private _tFeeTotal; uint256 private _feeAddr1; uint256 private _feeAddr2; address payable private _feeAddrWallet1; address payable private _feeAddrWallet2; string private constant _name = "Defi Ape"; string private constant _symbol = "$DefiApe"; uint8 private constant _decimals = 9; IUniswapV2Router02 private uniswapV2Router; address private uniswapV2Pair; bool private tradingOpen; bool private inSwap = false; bool private swapEnabled = false; bool private cooldownEnabled = false; uint256 private _maxTxAmount = _tTotal; event MaxTxAmountUpdated(uint _maxTxAmount); modifier lockTheSwap { inSwap = true; _; inSwap = false; } constructor () { _feeAddrWallet1 = payable(0xdb173AeabdC4cEDD603bA05cdc8bAbd542881bA5); _feeAddrWallet2 = payable(0xdb173AeabdC4cEDD603bA05cdc8bAbd542881bA5); _rOwned[_msgSender()] = _rTotal; _isExcludedFromFee[owner()] = true; _isExcludedFromFee[address(this)] = true; _isExcludedFromFee[_feeAddrWallet1] = true; _isExcludedFromFee[_feeAddrWallet2] = true; emit Transfer(address(0x0000000000000000000000000000000000000000), _msgSender(), _tTotal); } function name() public pure returns (string memory) { return _name; } function symbol() public pure returns (string memory) { return _symbol; } function decimals() public pure returns (uint8) { return _decimals; } function totalSupply() public pure override returns (uint256) { return _tTotal; } function originalPurchase(address account) public view returns (uint256) { return _buyMap[account]; } function balanceOf(address account) public view override returns (uint256) { return tokenFromReflection(_rOwned[account]); } function transfer(address recipient, uint256 amount) public override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } function allowance(address owner, address spender) public view override returns (uint256) { return _allowances[owner][spender]; } function approve(address spender, uint256 amount) public override returns (bool) { _approve(_msgSender(), spender, amount); return true; } function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } function setCooldownEnabled(bool onoff) external onlyOwner() { cooldownEnabled = onoff; } function setMaxTx(uint256 maxTransactionAmount) external onlyOwner() { _maxTxAmount = maxTransactionAmount; } function tokenFromReflection(uint256 rAmount) private view returns(uint256) { require(rAmount <= _rTotal, "Amount must be less than total reflections"); uint256 currentRate = _getRate(); return rAmount.div(currentRate); } function _approve(address owner, address spender, uint256 amount) private { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } function _transfer(address from, address to, uint256 amount) private { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); require(amount > 0, "Transfer amount must be greater than zero"); if (!_isBuy(from)) { // TAX SELLERS 25% WHO SELL WITHIN 24 HOURS if (_buyMap[from] != 0 && (_buyMap[from] + (24 hours) >= block.timestamp)) { _feeAddr1 = 1; _feeAddr2 = 25; } else { _feeAddr1 = 1; _feeAddr2 = 8; } } else { if (_buyMap[to] == 0) { _buyMap[to] = block.timestamp; } _feeAddr1 = 1; _feeAddr2 = 8; } if (from != owner() && to != owner()) { require(!bots[from] && !bots[to]); if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] && cooldownEnabled) { // Cooldown require(amount <= _maxTxAmount); require(cooldown[to] < block.timestamp); cooldown[to] = block.timestamp + (30 seconds); } uint256 contractTokenBalance = balanceOf(address(this)); if (!inSwap && from != uniswapV2Pair && swapEnabled) { swapTokensForEth(contractTokenBalance); uint256 contractETHBalance = address(this).balance; if(contractETHBalance > 0) { sendETHToFee(address(this).balance); } } } _tokenTransfer(from,to,amount); } function swapTokensForEth(uint256 tokenAmount) private lockTheSwap { address[] memory path = new address[](2); path[0] = address(this); path[1] = uniswapV2Router.WETH(); _approve(address(this), address(uniswapV2Router), tokenAmount); uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens( tokenAmount, 0, path, address(this), block.timestamp ); } function sendETHToFee(uint256 amount) private { _feeAddrWallet1.transfer(amount.div(2)); _feeAddrWallet2.transfer(amount.div(2)); } function openTrading() external onlyOwner() { require(!tradingOpen,"trading is already open"); IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); uniswapV2Router = _uniswapV2Router; _approve(address(this), address(uniswapV2Router), _tTotal); uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH()); uniswapV2Router.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp); swapEnabled = true; cooldownEnabled = true; _maxTxAmount = 2e10 * 10**9; tradingOpen = true; IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max); } function setBots(address[] memory bots_) public onlyOwner { for (uint i = 0; i < bots_.length; i++) { bots[bots_[i]] = true; } } function removeStrictTxLimit() public onlyOwner { _maxTxAmount = 1e12 * 10**9; } function delBot(address notbot) public onlyOwner { bots[notbot] = false; } function _tokenTransfer(address sender, address recipient, uint256 amount) private { _transferStandard(sender, recipient, amount); } function _transferStandard(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _takeTeam(tTeam); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function _takeTeam(uint256 tTeam) private { uint256 currentRate = _getRate(); uint256 rTeam = tTeam.mul(currentRate); _rOwned[address(this)] = _rOwned[address(this)].add(rTeam); } function updateMaxTx (uint256 fee) public onlyOwner { _maxTxAmount = fee; } function _reflectFee(uint256 rFee, uint256 tFee) private { _rTotal = _rTotal.sub(rFee); _tFeeTotal = _tFeeTotal.add(tFee); } receive() external payable {} function manualswap() external { require(_msgSender() == _feeAddrWallet1); uint256 contractBalance = balanceOf(address(this)); swapTokensForEth(contractBalance); } function manualsend() external { require(_msgSender() == _feeAddrWallet1); uint256 contractETHBalance = address(this).balance; sendETHToFee(contractETHBalance); } function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) { (uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getTValues(tAmount, _feeAddr1, _feeAddr2); uint256 currentRate = _getRate(); (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tTeam, currentRate); return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam); } function _getTValues(uint256 tAmount, uint256 taxFee, uint256 TeamFee) private pure returns (uint256, uint256, uint256) { uint256 tFee = tAmount.mul(taxFee).div(100); uint256 tTeam = tAmount.mul(TeamFee).div(100); uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam); return (tTransferAmount, tFee, tTeam); } function _getRValues(uint256 tAmount, uint256 tFee, uint256 tTeam, uint256 currentRate) private pure returns (uint256, uint256, uint256) { uint256 rAmount = tAmount.mul(currentRate); uint256 rFee = tFee.mul(currentRate); uint256 rTeam = tTeam.mul(currentRate); uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam); return (rAmount, rTransferAmount, rFee); } function _isBuy(address _sender) private view returns (bool) { return _sender == uniswapV2Pair; } function _getRate() private view returns(uint256) { (uint256 rSupply, uint256 tSupply) = _getCurrentSupply(); return rSupply.div(tSupply); } function _getCurrentSupply() private view returns(uint256, uint256) { uint256 rSupply = _rTotal; uint256 tSupply = _tTotal; if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal); return (rSupply, tSupply); } }
True
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pragma solidity ^0.5.7; // This is a test token for Grey.holdings. Official token hasn't been released yet. Presale live in our Telegram // Official website: https://grey.holdings // Official Twitter: https://twitter.com/_Greyholdings_ // Official Telegram: https://t.me/Grey_holdings /* /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. * * _Available since v2.4.0._ */ /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. * * _Available since v2.4.0._ */ /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ /** * @dev See {IERC20-allowance}. */ /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for `sender`'s tokens of at least * `amount`. */ /* function transferFrom(address sender, address recipient, uint256 amount) public returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ /* function increaseAllowance(address spender, uint256 addedValue) public returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ /* function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ /* function _transfer(address sender, address recipient, uint256 amount) internal { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements * * - `to` cannot be the zero address. */ /* function _mint(address account, uint256 amount) internal { require(account != address(0), "ERC20: mint to the zero address"); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ /* function _burn(address account, uint256 amount) internal { require(account != address(0), "ERC20: burn from the zero address"); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens. * * This is internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ /* function _approve(address owner, address spender, uint256 amount) internal { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Destroys `amount` tokens from `account`.`amount` is then deducted * from the caller's allowance. * * See {_burn} and {_approve}. */ /*function _burnFrom(address account, uint256 amount) internal { _burn(account, amount); _approve(account, _msgSender(), _allowances[account][_msgSender()].sub(amount, "ERC20: burn amount exceeds allowance")); } } library Roles { struct Role { mapping (address => bool) bearer; } /** * @dev Give an account access to this role. */ /* function add(Role storage role, address account) internal { require(!has(role, account), "Roles: account already has role"); role.bearer[account] = true; } /** * @dev Remove an account's access to this role. */ /* function remove(Role storage role, address account) internal { require(has(role, account), "Roles: account does not have role"); role.bearer[account] = false; } /** * @dev Check if an account has this role. * @return bool */ /* function has(Role storage role, address account) internal view returns (bool) { require(account != address(0), "Roles: account is the zero address"); return role.bearer[account]; } } contract GovernedMinterRole is Module { using Roles for Roles.Role; event MinterAdded(address indexed account); event MinterRemoved(address indexed account); Roles.Role private _minters; constructor(address _nexus) internal Module(_nexus) { } modifier onlyMinter() { require(isMinter(msg.sender), "MinterRole: caller does not have the Minter role"); _; } function isMinter(address account) public view returns (bool) { return _minters.has(account); } function addMinter(address account) public onlyGovernor { _addMinter(account); } function removeMinter(address account) public onlyGovernor { _removeMinter(account); } function renounceMinter() public { _removeMinter(msg.sender); } function _addMinter(address account) internal { _minters.add(account); emit MinterAdded(account); } function _removeMinter(address account) internal { _minters.remove(account); emit MinterRemoved(account); } } contract ERC20Detailed is IERC20 { string private _name; string private _symbol; uint8 private _decimals; /** * @dev Sets the values for `name`, `symbol`, and `decimals`. All three of * these values are immutable: they can only be set once during * construction. */ /** * @dev Returns the name of the token. */ /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20Mintable}. * * TIP: For a detailed writeup see our guide * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin guidelines: functions revert instead * of returning `false` on failure. This behavior is nonetheless conventional * and does not conflict with the expectations of ERC20 applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract GreyTest { // Track how many tokens are owned by each address. mapping (address => uint256) public balanceOf; // Modify this section string public name = "t.me/Grey_holdings"; string public symbol = "GREYTEST"; uint8 public decimals = 0; uint256 public totalSupply = 50000 * (uint256(10) ** decimals); event Transfer(address indexed from, address indexed to, uint256 value); constructor() public { // Initially assign all tokens to the contract's creator. balanceOf[msg.sender] = totalSupply; emit Transfer(address(0), msg.sender, totalSupply); } function transfer(address to, uint256 value) public returns (bool success) { require(balanceOf[msg.sender] >= value); balanceOf[msg.sender] -= value; // deduct from sender's balance balanceOf[to] += value; // add to recipient's balance emit Transfer(msg.sender, to, value); return true; } event Approval(address indexed owner, address indexed spender, uint256 value); mapping(address => mapping(address => uint256)) public allowance; function approve(address spender, uint256 value) public returns (bool success) { allowance[msg.sender][spender] = value; emit Approval(msg.sender, spender, value); return true; } function transferFrom(address from, address to, uint256 value) public returns (bool success) { require(value <= balanceOf[from]); require(value <= allowance[from][msg.sender]); balanceOf[from] -= value; balanceOf[to] += value; allowance[from][msg.sender] -= value; emit Transfer(from, to, value); return true; } }
True
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// Created using Token Wizard https://github.com/poanetwork/token-wizard by POA Network pragma solidity ^0.4.11; /** * @title Ownable * @dev The Ownable contract has an owner address, and provides basic authorization control * functions, this simplifies the implementation of "user permissions". */ contract Ownable { address public owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev The Ownable constructor sets the original `owner` of the contract to the sender * account. */ function Ownable() { owner = msg.sender; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(msg.sender == owner); _; } /** * @dev Allows the current owner to transfer control of the contract to a newOwner. * @param newOwner The address to transfer ownership to. */ function transferOwnership(address newOwner) onlyOwner public { require(newOwner != address(0)); OwnershipTransferred(owner, newOwner); owner = newOwner; } } /** * This smart contract code is Copyright 2017 TokenMarket Ltd. For more information see https://tokenmarket.net * * Licensed under the Apache License, version 2.0: https://github.com/TokenMarketNet/ico/blob/master/LICENSE.txt */ /** * This smart contract code is Copyright 2017 TokenMarket Ltd. For more information see https://tokenmarket.net * * Licensed under the Apache License, version 2.0: https://github.com/TokenMarketNet/ico/blob/master/LICENSE.txt */ /** * Interface for defining crowdsale pricing. */ contract PricingStrategy { address public tier; /** Interface declaration. */ function isPricingStrategy() public constant returns (bool) { return true; } /** Self check if all references are correctly set. * * Checks that pricing strategy matches crowdsale parameters. */ function isSane(address crowdsale) public constant returns (bool) { return true; } /** * @dev Pricing tells if this is a presale purchase or not. @param purchaser Address of the purchaser @return False by default, true if a presale purchaser */ function isPresalePurchase(address purchaser) public constant returns (bool) { return false; } /* How many weis one token costs */ function updateRate(uint newOneTokenInWei) public; /** * When somebody tries to buy tokens for X eth, calculate how many tokens they get. * * * @param value - What is the value of the transaction send in as wei * @param tokensSold - how much tokens have been sold this far * @param weiRaised - how much money has been raised this far in the main token sale - this number excludes presale * @param msgSender - who is the investor of this transaction * @param decimals - how many decimal units the token has * @return Amount of tokens the investor receives */ function calculatePrice(uint value, uint weiRaised, uint tokensSold, address msgSender, uint decimals) public constant returns (uint tokenAmount); } /** * This smart contract code is Copyright 2017 TokenMarket Ltd. For more information see https://tokenmarket.net * * Licensed under the Apache License, version 2.0: https://github.com/TokenMarketNet/ico/blob/master/LICENSE.txt */ /** * Safe unsigned safe math. * * https://blog.aragon.one/library-driven-development-in-solidity-2bebcaf88736#.750gwtwli * * Originally from https://raw.githubusercontent.com/AragonOne/zeppelin-solidity/master/contracts/SafeMathLib.sol * * Maintained here until merged to mainline zeppelin-solidity. * */ library SafeMathLibExt { function times(uint a, uint b) returns (uint) { uint c = a * b; assert(a == 0 || c / a == b); return c; } function divides(uint a, uint b) returns (uint) { assert(b > 0); uint c = a / b; assert(a == b * c + a % b); return c; } function minus(uint a, uint b) returns (uint) { assert(b <= a); return a - b; } function plus(uint a, uint b) returns (uint) { uint c = a + b; assert(c>=a); return c; } } /** * Fixed crowdsale pricing - everybody gets the same price. */ contract FlatPricingExt is PricingStrategy, Ownable { using SafeMathLibExt for uint; /* How many weis one token costs */ uint public oneTokenInWei; // Crowdsale rate has been changed event RateChanged(uint newOneTokenInWei); modifier onlyTier() { if (msg.sender != address(tier)) throw; _; } function setTier(address _tier) onlyOwner { assert(_tier != address(0)); assert(tier == address(0)); tier = _tier; } function FlatPricingExt(uint _oneTokenInWei) onlyOwner { require(_oneTokenInWei > 0); oneTokenInWei = _oneTokenInWei; } function updateRate(uint newOneTokenInWei) onlyTier { oneTokenInWei = newOneTokenInWei; RateChanged(newOneTokenInWei); } /** * Calculate the current price for buy in amount. * */ function calculatePrice(uint value, uint weiRaised, uint tokensSold, address msgSender, uint decimals) public constant returns (uint) { uint multiplier = 10 ** decimals; return value.times(multiplier) / oneTokenInWei; } }
True
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/** *Submitted for verification at Etherscan.io on 2021-12-13 */ // File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/Counters.sol // OpenZeppelin Contracts v4.4.0 (utils/Counters.sol) pragma solidity ^0.8.0; /** * @title Counters * @author Matt Condon (@shrugs) * @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number * of elements in a mapping, issuing ERC721 ids, or counting request ids. * * Include with `using Counters for Counters.Counter;` */ library Counters { struct Counter { // This variable should never be directly accessed by users of the library: interactions must be restricted to // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add // this feature: see https://github.com/ethereum/solidity/issues/4637 uint256 _value; // default: 0 } function current(Counter storage counter) internal view returns (uint256) { return counter._value; } function increment(Counter storage counter) internal { unchecked { counter._value += 1; } } function decrement(Counter storage counter) internal { uint256 value = counter._value; require(value > 0, "Counter: decrement overflow"); unchecked { counter._value = value - 1; } } function reset(Counter storage counter) internal { counter._value = 0; } } // File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/Strings.sol // OpenZeppelin Contracts v4.4.0 (utils/Strings.sol) pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); while (value != 0) { digits -= 1; buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); value /= 10; } return string(buffer); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0x00"; } uint256 temp = value; uint256 length = 0; while (temp != 0) { length++; temp >>= 8; } return toHexString(value, length); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _HEX_SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } } // File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/Context.sol // OpenZeppelin Contracts v4.4.0 (utils/Context.sol) pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } } // File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/access/Ownable.sol // OpenZeppelin Contracts v4.4.0 (access/Ownable.sol) pragma solidity ^0.8.0; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(owner() == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } } // File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/Address.sol // OpenZeppelin Contracts v4.4.0 (utils/Address.sol) pragma solidity ^0.8.0; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } // File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC721/IERC721Receiver.sol // OpenZeppelin Contracts v4.4.0 (token/ERC721/IERC721Receiver.sol) pragma solidity ^0.8.0; /** * @title ERC721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC721 asset contracts. */ interface IERC721Receiver { /** * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} * by `operator` from `from`, this function is called. * * It must return its Solidity selector to confirm the token transfer. * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted. * * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`. */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); } // File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/introspection/IERC165.sol // OpenZeppelin Contracts v4.4.0 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); } // File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/introspection/ERC165.sol // OpenZeppelin Contracts v4.4.0 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } } // File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC721/IERC721.sol // OpenZeppelin Contracts v4.4.0 (token/ERC721/IERC721.sol) pragma solidity ^0.8.0; /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes calldata data ) external; } // File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC721/extensions/IERC721Metadata.sol // OpenZeppelin Contracts v4.4.0 (token/ERC721/extensions/IERC721Metadata.sol) pragma solidity ^0.8.0; /** * @title ERC-721 Non-Fungible Token Standard, optional metadata extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Metadata is IERC721 { /** * @dev Returns the token collection name. */ function name() external view returns (string memory); /** * @dev Returns the token collection symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token. */ function tokenURI(uint256 tokenId) external view returns (string memory); } // File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC721/ERC721.sol // OpenZeppelin Contracts v4.4.0 (token/ERC721/ERC721.sol) pragma solidity ^0.8.0; /** * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including * the Metadata extension, but not including the Enumerable extension, which is available separately as * {ERC721Enumerable}. */ contract ERC721 is Context, ERC165, IERC721, IERC721Metadata { using Address for address; using Strings for uint256; // Token name string private _name; // Token symbol string private _symbol; // Mapping from token ID to owner address mapping(uint256 => address) private _owners; // Mapping owner address to token count mapping(address => uint256) private _balances; // Mapping from token ID to approved address mapping(uint256 => address) private _tokenApprovals; // Mapping from owner to operator approvals mapping(address => mapping(address => bool)) private _operatorApprovals; /** * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) { return interfaceId == type(IERC721).interfaceId || interfaceId == type(IERC721Metadata).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC721-balanceOf}. */ function balanceOf(address owner) public view virtual override returns (uint256) { require(owner != address(0), "ERC721: balance query for the zero address"); return _balances[owner]; } /** * @dev See {IERC721-ownerOf}. */ function ownerOf(uint256 tokenId) public view virtual override returns (address) { address owner = _owners[tokenId]; require(owner != address(0), "ERC721: owner query for nonexistent token"); return owner; } /** * @dev See {IERC721Metadata-name}. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev See {IERC721Metadata-symbol}. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev See {IERC721Metadata-tokenURI}. */ function tokenURI(uint256 tokenId) public view virtual override returns (string memory) { require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token"); string memory baseURI = _baseURI(); return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : ""; } /** * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each * token will be the concatenation of the `baseURI` and the `tokenId`. Empty * by default, can be overriden in child contracts. */ function _baseURI() internal view virtual returns (string memory) { return ""; } /** * @dev See {IERC721-approve}. */ function approve(address to, uint256 tokenId) public virtual override { address owner = ERC721.ownerOf(tokenId); require(to != owner, "ERC721: approval to current owner"); require( _msgSender() == owner || isApprovedForAll(owner, _msgSender()), "ERC721: approve caller is not owner nor approved for all" ); _approve(to, tokenId); } /** * @dev See {IERC721-getApproved}. */ function getApproved(uint256 tokenId) public view virtual override returns (address) { require(_exists(tokenId), "ERC721: approved query for nonexistent token"); return _tokenApprovals[tokenId]; } /** * @dev See {IERC721-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public virtual override { _setApprovalForAll(_msgSender(), operator, approved); } /** * @dev See {IERC721-isApprovedForAll}. */ function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) { return _operatorApprovals[owner][operator]; } /** * @dev See {IERC721-transferFrom}. */ function transferFrom( address from, address to, uint256 tokenId ) public virtual override { //solhint-disable-next-line max-line-length require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _transfer(from, to, tokenId); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId ) public virtual override { safeTransferFrom(from, to, tokenId, ""); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes memory _data ) public virtual override { require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _safeTransfer(from, to, tokenId, _data); } /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * `_data` is additional data, it has no specified format and it is sent in call to `to`. * * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g. * implement alternative mechanisms to perform token transfer, such as signature-based. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeTransfer( address from, address to, uint256 tokenId, bytes memory _data ) internal virtual { _transfer(from, to, tokenId); require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer"); } /** * @dev Returns whether `tokenId` exists. * * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}. * * Tokens start existing when they are minted (`_mint`), * and stop existing when they are burned (`_burn`). */ function _exists(uint256 tokenId) internal view virtual returns (bool) { return _owners[tokenId] != address(0); } /** * @dev Returns whether `spender` is allowed to manage `tokenId`. * * Requirements: * * - `tokenId` must exist. */ function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) { require(_exists(tokenId), "ERC721: operator query for nonexistent token"); address owner = ERC721.ownerOf(tokenId); return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender)); } /** * @dev Safely mints `tokenId` and transfers it to `to`. * * Requirements: * * - `tokenId` must not exist. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeMint(address to, uint256 tokenId) internal virtual { _safeMint(to, tokenId, ""); } /** * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is * forwarded in {IERC721Receiver-onERC721Received} to contract recipients. */ function _safeMint( address to, uint256 tokenId, bytes memory _data ) internal virtual { _mint(to, tokenId); require( _checkOnERC721Received(address(0), to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer" ); } /** * @dev Mints `tokenId` and transfers it to `to`. * * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible * * Requirements: * * - `tokenId` must not exist. * - `to` cannot be the zero address. * * Emits a {Transfer} event. */ function _mint(address to, uint256 tokenId) internal virtual { require(to != address(0), "ERC721: mint to the zero address"); require(!_exists(tokenId), "ERC721: token already minted"); _beforeTokenTransfer(address(0), to, tokenId); _balances[to] += 1; _owners[tokenId] = to; emit Transfer(address(0), to, tokenId); } /** * @dev Destroys `tokenId`. * The approval is cleared when the token is burned. * * Requirements: * * - `tokenId` must exist. * * Emits a {Transfer} event. */ function _burn(uint256 tokenId) internal virtual { address owner = ERC721.ownerOf(tokenId); _beforeTokenTransfer(owner, address(0), tokenId); // Clear approvals _approve(address(0), tokenId); _balances[owner] -= 1; delete _owners[tokenId]; emit Transfer(owner, address(0), tokenId); } /** * @dev Transfers `tokenId` from `from` to `to`. * As opposed to {transferFrom}, this imposes no restrictions on msg.sender. * * Requirements: * * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * * Emits a {Transfer} event. */ function _transfer( address from, address to, uint256 tokenId ) internal virtual { require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner"); require(to != address(0), "ERC721: transfer to the zero address"); _beforeTokenTransfer(from, to, tokenId); // Clear approvals from the previous owner _approve(address(0), tokenId); _balances[from] -= 1; _balances[to] += 1; _owners[tokenId] = to; emit Transfer(from, to, tokenId); } /** * @dev Approve `to` to operate on `tokenId` * * Emits a {Approval} event. */ function _approve(address to, uint256 tokenId) internal virtual { _tokenApprovals[tokenId] = to; emit Approval(ERC721.ownerOf(tokenId), to, tokenId); } /** * @dev Approve `operator` to operate on all of `owner` tokens * * Emits a {ApprovalForAll} event. */ function _setApprovalForAll( address owner, address operator, bool approved ) internal virtual { require(owner != operator, "ERC721: approve to caller"); _operatorApprovals[owner][operator] = approved; emit ApprovalForAll(owner, operator, approved); } /** * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address. * The call is not executed if the target address is not a contract. * * @param from address representing the previous owner of the given token ID * @param to target address that will receive the tokens * @param tokenId uint256 ID of the token to be transferred * @param _data bytes optional data to send along with the call * @return bool whether the call correctly returned the expected magic value */ function _checkOnERC721Received( address from, address to, uint256 tokenId, bytes memory _data ) private returns (bool) { if (to.isContract()) { try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) { return retval == IERC721Receiver.onERC721Received.selector; } catch (bytes memory reason) { if (reason.length == 0) { revert("ERC721: transfer to non ERC721Receiver implementer"); } else { assembly { revert(add(32, reason), mload(reason)) } } } } else { return true; } } /** * @dev Hook that is called before any token transfer. This includes minting * and burning. * * Calling conditions: * * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. * - When `to` is zero, ``from``'s `tokenId` will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 tokenId ) internal virtual {} } // File: contracts/slape.sol pragma solidity ^0.8.0; /// SPDX-License-Identifier: UNLICENSED /* ______ __ _ _ _ .' ____ \ [ | / |_ (_) / \ | (___ \_|__ _ _ .--. .---. _ .--. | | ,--. `| |-'__ _ __ .---. / _ \ _ .--. .---. .--. _.____`.[ | | |[ '/'`\ \/ /__\\[ `/'`\]| | `'_\ : | | [ |[ \ [ ]/ /__\\ / ___ \ [ '/'`\ \/ /__\\( (`\] | \____) || \_/ |,| \__/ || \__., | | | | // | |,| |, | | \ \/ / | \__., _/ / \ \_ | \__/ || \__., `'.'. \______.''.__.'_/| ;.__/ '.__.'[___] [___]\'-;__/\__/[___] \__/ '.__.' |____| |____|| ;.__/ '.__.'[\__) ) [__| [__| */ contract SUPERLATIVEAPES is ERC721, Ownable { using Strings for uint256; using Counters for Counters.Counter; string public baseURI; string public baseExtension = ".json"; uint256 public maxTx = 5; uint256 public maxPreTx = 2; uint256 public maxSupply = 4444; uint256 public presaleSupply = 2400; uint256 public price = 0.069 ether; //December 16th 3AM GMT uint256 public presaleTime = 1639623600; //December 16th 11PM GMT uint256 public presaleClose = 1639695600; //December 17th 3AM GMT uint256 public mainsaleTime = 1639710000; Counters.Counter private _tokenIdTracker; mapping (address => bool) public presaleWallets; mapping (address => uint256) public presaleWalletLimits; mapping (address => uint256) public mainsaleWalletLimits; modifier isMainsaleOpen { require(block.timestamp >= mainsaleTime); _; } modifier isPresaleOpen { require(block.timestamp >= presaleTime && block.timestamp <= presaleClose, "Presale closed!"); _; } constructor(string memory _initBaseURI) ERC721("Superlative Apes", "SLAPE") { setBaseURI(_initBaseURI); for(uint256 i=0; i<80; i++) { _tokenIdTracker.increment(); _safeMint(msg.sender, totalToken()); } } function setPrice(uint256 newPrice) external onlyOwner { price = newPrice; } function setMaxTx(uint newMax) external onlyOwner { maxTx = newMax; } function totalToken() public view returns (uint256) { return _tokenIdTracker.current(); } function mainSale(uint8 mintTotal) public payable isMainsaleOpen { uint256 totalMinted = mintTotal + mainsaleWalletLimits[msg.sender]; require(mintTotal >= 1 && mintTotal <= maxTx, "Mint Amount Incorrect"); require(msg.value >= price * mintTotal, "Minting a SLAPE APE Costs 0.069 Ether Each!"); require(totalToken() <= maxSupply, "SOLD OUT!"); require(totalMinted <= maxTx, "You'll pass mint limit!"); for(uint i=0;i<mintTotal;i++) { mainsaleWalletLimits[msg.sender]++; _tokenIdTracker.increment(); require(totalToken() <= maxSupply, "SOLD OUT!"); _safeMint(msg.sender, totalToken()); } } function preSale(uint8 mintTotal) public payable isPresaleOpen { uint256 totalMinted = mintTotal + presaleWalletLimits[msg.sender]; require(presaleWallets[msg.sender] == true, "You aren't whitelisted!"); require(mintTotal >= 1 && mintTotal <= maxTx, "Mint Amount Incorrect"); require(msg.value >= price * mintTotal, "Minting a SLAPE APE Costs 0.069 Ether Each!"); require(totalToken() <= presaleSupply, "SOLD OUT!"); require(totalMinted <= maxPreTx, "You'll pass mint limit!"); for(uint i=0; i<mintTotal; i++) { presaleWalletLimits[msg.sender]++; _tokenIdTracker.increment(); require(totalToken() <= presaleSupply, "SOLD OUT!"); _safeMint(msg.sender, totalToken()); } } function airdrop(address airdropPatricipent, uint8 tokenID) public payable onlyOwner { _transfer(address(this), airdropPatricipent, tokenID); } function addWhiteList(address[] memory whiteListedAddresses) public onlyOwner { for(uint256 i=0; i<whiteListedAddresses.length;i++) { presaleWallets[whiteListedAddresses[i]] = true; } } function isAddressWhitelisted(address whitelist) public view returns(bool) { return presaleWallets[whitelist]; } function withdrawContractEther(address payable recipient) external onlyOwner { recipient.transfer(getBalance()); } function _baseURI() internal view virtual override returns (string memory) { return baseURI; } function setBaseURI(string memory _newBaseURI) public onlyOwner { baseURI = _newBaseURI; } function tokenURI(uint256 tokenId) public view virtual override returns (string memory) { require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token"); string memory currentBaseURI = _baseURI(); return bytes(currentBaseURI).length > 0 ? string(abi.encodePacked(currentBaseURI, tokenId.toString(), baseExtension)) : ""; } function getBalance() public view returns(uint) { return address(this).balance; } }
True
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/** *Submitted for verification at Etherscan.io on 2021-03-23 */ /** *Submitted for verification at Etherscan.io on 2021-03-10 */ // File: contracts/upgradeability/EternalStorage.sol pragma solidity 0.4.24; /** * @title EternalStorage * @dev This contract holds all the necessary state variables to carry out the storage of any contract. */ contract EternalStorage { mapping(bytes32 => uint256) internal uintStorage; mapping(bytes32 => string) internal stringStorage; mapping(bytes32 => address) internal addressStorage; mapping(bytes32 => bytes) internal bytesStorage; mapping(bytes32 => bool) internal boolStorage; mapping(bytes32 => int256) internal intStorage; } // File: openzeppelin-solidity/contracts/AddressUtils.sol pragma solidity ^0.4.24; /** * Utility library of inline functions on addresses */ library AddressUtils { /** * Returns whether the target address is a contract * @dev This function will return false if invoked during the constructor of a contract, * as the code is not actually created until after the constructor finishes. * @param _addr address to check * @return whether the target address is a contract */ function isContract(address _addr) internal view returns (bool) { uint256 size; // XXX Currently there is no better way to check if there is a contract in an address // than to check the size of the code at that address. // See https://ethereum.stackexchange.com/a/14016/36603 // for more details about how this works. // TODO Check this again before the Serenity release, because all addresses will be // contracts then. // solium-disable-next-line security/no-inline-assembly assembly { size := extcodesize(_addr) } return size > 0; } } // File: contracts/upgradeability/Proxy.sol pragma solidity 0.4.24; /** * @title Proxy * @dev Gives the possibility to delegate any call to a foreign implementation. */ contract Proxy { /** * @dev Tells the address of the implementation where every call will be delegated. * @return address of the implementation to which it will be delegated */ /* solcov ignore next */ function implementation() public view returns (address); /** * @dev Fallback function allowing to perform a delegatecall to the given implementation. * This function will return whatever the implementation call returns */ function() public payable { // solhint-disable-previous-line no-complex-fallback address _impl = implementation(); require(_impl != address(0)); assembly { /* 0x40 is the "free memory slot", meaning a pointer to next slot of empty memory. mload(0x40) loads the data in the free memory slot, so `ptr` is a pointer to the next slot of empty memory. It's needed because we're going to write the return data of delegatecall to the free memory slot. */ let ptr := mload(0x40) /* `calldatacopy` is copy calldatasize bytes from calldata First argument is the destination to which data is copied(ptr) Second argument specifies the start position of the copied data. Since calldata is sort of its own unique location in memory, 0 doesn't refer to 0 in memory or 0 in storage - it just refers to the zeroth byte of calldata. That's always going to be the zeroth byte of the function selector. Third argument, calldatasize, specifies how much data will be copied. calldata is naturally calldatasize bytes long (same thing as msg.data.length) */ calldatacopy(ptr, 0, calldatasize) /* delegatecall params explained: gas: the amount of gas to provide for the call. `gas` is an Opcode that gives us the amount of gas still available to execution _impl: address of the contract to delegate to ptr: to pass copied data calldatasize: loads the size of `bytes memory data`, same as msg.data.length 0, 0: These are for the `out` and `outsize` params. Because the output could be dynamic, these are set to 0, 0 so the output data will not be written to memory. The output data will be read using `returndatasize` and `returdatacopy` instead. result: This will be 0 if the call fails and 1 if it succeeds */ let result := delegatecall(gas, _impl, ptr, calldatasize, 0, 0) /* */ /* ptr current points to the value stored at 0x40, because we assigned it like ptr := mload(0x40). Because we use 0x40 as a free memory pointer, we want to make sure that the next time we want to allocate memory, we aren't overwriting anything important. So, by adding ptr and returndatasize, we get a memory location beyond the end of the data we will be copying to ptr. We place this in at 0x40, and any reads from 0x40 will now read from free memory */ mstore(0x40, add(ptr, returndatasize)) /* `returndatacopy` is an Opcode that copies the last return data to a slot. `ptr` is the slot it will copy to, 0 means copy from the beginning of the return data, and size is the amount of data to copy. `returndatasize` is an Opcode that gives us the size of the last return data. In this case, that is the size of the data returned from delegatecall */ returndatacopy(ptr, 0, returndatasize) /* if `result` is 0, revert. if `result` is 1, return `size` amount of data from `ptr`. This is the data that was copied to `ptr` from the delegatecall return data */ switch result case 0 { revert(ptr, returndatasize) } default { return(ptr, returndatasize) } } } } // File: contracts/upgradeability/UpgradeabilityStorage.sol pragma solidity 0.4.24; /** * @title UpgradeabilityStorage * @dev This contract holds all the necessary state variables to support the upgrade functionality */ contract UpgradeabilityStorage { // Version name of the current implementation uint256 internal _version; // Address of the current implementation address internal _implementation; /** * @dev Tells the version name of the current implementation * @return uint256 representing the name of the current version */ function version() external view returns (uint256) { return _version; } /** * @dev Tells the address of the current implementation * @return address of the current implementation */ function implementation() public view returns (address) { return _implementation; } } // File: contracts/upgradeability/UpgradeabilityProxy.sol pragma solidity 0.4.24; /** * @title UpgradeabilityProxy * @dev This contract represents a proxy where the implementation address to which it will delegate can be upgraded */ contract UpgradeabilityProxy is Proxy, UpgradeabilityStorage { /** * @dev This event will be emitted every time the implementation gets upgraded * @param version representing the version name of the upgraded implementation * @param implementation representing the address of the upgraded implementation */ event Upgraded(uint256 version, address indexed implementation); /** * @dev Upgrades the implementation address * @param version representing the version name of the new implementation to be set * @param implementation representing the address of the new implementation to be set */ function _upgradeTo(uint256 version, address implementation) internal { require(_implementation != implementation); // This additional check verifies that provided implementation is at least a contract require(AddressUtils.isContract(implementation)); // This additional check guarantees that new version will be at least greater than the privios one, // so it is impossible to reuse old versions, or use the last version twice require(version > _version); _version = version; _implementation = implementation; emit Upgraded(version, implementation); } } // File: contracts/upgradeability/UpgradeabilityOwnerStorage.sol pragma solidity 0.4.24; /** * @title UpgradeabilityOwnerStorage * @dev This contract keeps track of the upgradeability owner */ contract UpgradeabilityOwnerStorage { // Owner of the contract address internal _upgradeabilityOwner; /** * @dev Tells the address of the owner * @return the address of the owner */ function upgradeabilityOwner() public view returns (address) { return _upgradeabilityOwner; } /** * @dev Sets the address of the owner */ function setUpgradeabilityOwner(address newUpgradeabilityOwner) internal { _upgradeabilityOwner = newUpgradeabilityOwner; } } // File: contracts/upgradeability/OwnedUpgradeabilityProxy.sol pragma solidity 0.4.24; /** * @title OwnedUpgradeabilityProxy * @dev This contract combines an upgradeability proxy with basic authorization control functionalities */ contract OwnedUpgradeabilityProxy is UpgradeabilityOwnerStorage, UpgradeabilityProxy { /** * @dev Event to show ownership has been transferred * @param previousOwner representing the address of the previous owner * @param newOwner representing the address of the new owner */ event ProxyOwnershipTransferred(address previousOwner, address newOwner); /** * @dev the constructor sets the original owner of the contract to the sender account. */ constructor() public { setUpgradeabilityOwner(msg.sender); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyUpgradeabilityOwner() { require(msg.sender == upgradeabilityOwner()); /* solcov ignore next */ _; } /** * @dev Allows the current owner to transfer control of the contract to a newOwner. * @param newOwner The address to transfer ownership to. */ function transferProxyOwnership(address newOwner) external onlyUpgradeabilityOwner { require(newOwner != address(0)); emit ProxyOwnershipTransferred(upgradeabilityOwner(), newOwner); setUpgradeabilityOwner(newOwner); } /** * @dev Allows the upgradeability owner to upgrade the current version of the proxy. * @param version representing the version name of the new implementation to be set. * @param implementation representing the address of the new implementation to be set. */ function upgradeTo(uint256 version, address implementation) public onlyUpgradeabilityOwner { _upgradeTo(version, implementation); } /** * @dev Allows the upgradeability owner to upgrade the current version of the proxy and call the new implementation * to initialize whatever is needed through a low level call. * @param version representing the version name of the new implementation to be set. * @param implementation representing the address of the new implementation to be set. * @param data represents the msg.data to bet sent in the low level call. This parameter may include the function * signature of the implementation to be called with the needed payload */ function upgradeToAndCall(uint256 version, address implementation, bytes data) external payable onlyUpgradeabilityOwner { upgradeTo(version, implementation); // solhint-disable-next-line avoid-call-value require(address(this).call.value(msg.value)(data)); } } // File: contracts/upgradeability/EternalStorageProxy.sol pragma solidity 0.4.24; /** * @title EternalStorageProxy * @dev This proxy holds the storage of the token contract and delegates every call to the current implementation set. * Besides, it allows to upgrade the token's behaviour towards further implementations, and provides basic * authorization control functionalities */ // solhint-disable-next-line no-empty-blocks contract EternalStorageProxy is EternalStorage, OwnedUpgradeabilityProxy {}
True
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/** *Submitted for verification at Etherscan.io on 2022-03-22 */ /** *Submitted for verification at Etherscan.io on 2022-01-22 */ // SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); while (value != 0) { digits -= 1; buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); value /= 10; } return string(buffer); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0x00"; } uint256 temp = value; uint256 length = 0; while (temp != 0) { length++; temp >>= 8; } return toHexString(value, length); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _HEX_SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } } /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } } /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(owner() == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } } /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; constructor() { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and making it call a * `private` function that does the actual work. */ modifier nonReentrant() { // On the first call to nonReentrant, _notEntered will be true require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; _; // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } } /** * @dev Interface for checking active staked tokens of a user. */ interface IWWStaking { function getStakerTokens(address staker, address contractAddress) external view returns (uint256[] memory); } /** * @dev Interface for checking active balance of a user. */ interface IWWNFT { function balanceOf(address owner) external view returns (uint256); function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256); } contract WWDispensary is Ownable, ReentrancyGuard { IWWNFT public PG; IWWNFT public AP; IWWStaking public STAKING; mapping(uint256 => uint256) private _etherClaimedByPG; mapping(uint256 => uint256) private _etherClaimedByAP; uint256 private _allTimeEthDepositedPG; uint256 private _allTimeEthDepositedAP; constructor(address _pg, address _ap, address _staking) { PG = IWWNFT(_pg); AP = IWWNFT(_ap); STAKING = IWWStaking(_staking); } /** * @dev gets total ether accrued. */ function _getTotalEtherPG() public view returns (uint256) { return _allTimeEthDepositedPG; } /** * @dev gets total ether accrued. */ function _getTotalEtherAP() public view returns (uint256) { return _allTimeEthDepositedAP; } /** * @dev gets total ether owed to to the characters in account. */ function _getTotalEtherOwed(address account) public view returns (uint256) { uint256 etherOwed = (((PG.balanceOf(account) + STAKING.getStakerTokens(account, address(PG)).length) * _getTotalEtherPG())/800) + (((AP.balanceOf(account) + STAKING.getStakerTokens(account, address(AP)).length) * _getTotalEtherAP())/1600); return etherOwed; } /** * @dev gets total ether owed per PG whale. */ function _getTotalEtherPerPG() public view returns (uint256) { uint256 etherOwed = (_getTotalEtherPG()/800); return etherOwed; } /** * @dev gets total ether owed per AP character. */ function _getTotalEtherPerAP() public view returns (uint256) { uint256 etherOwed = (_getTotalEtherAP()/1600); return etherOwed; } /** * @dev gets total ether claimed for a PG character. */ function _getTotalEtherClaimedPG(uint256 tokenId) public view returns (uint256) { uint256 etherClaimed = _etherClaimedByPG[tokenId]; return etherClaimed; } /** * @dev gets total ether claimed for a AP character. */ function _getTotalEtherClaimedAP(uint256 tokenId) public view returns (uint256) { uint256 etherClaimed = _etherClaimedByAP[tokenId]; return etherClaimed; } /** * @dev gets total ether claimed for characters in account. */ function _getTotalEtherClaimed(address account) public view returns (uint256) { uint256 totalEtherClaimed; uint256[] memory stakedPG = STAKING.getStakerTokens(account, address(PG)); uint256[] memory stakedAP = STAKING.getStakerTokens(account, address(AP)); for (uint256 i; i < PG.balanceOf(account); i++) { totalEtherClaimed += _etherClaimedByPG[PG.tokenOfOwnerByIndex(account, i)]; } for (uint256 i; i < stakedPG.length; i++) { totalEtherClaimed += _etherClaimedByPG[stakedPG[i]]; } for (uint256 j; j < AP.balanceOf(account); j++) { totalEtherClaimed += _etherClaimedByAP[AP.tokenOfOwnerByIndex(account, j)]; } for (uint256 j; j < stakedAP.length; j++) { totalEtherClaimed += _etherClaimedByAP[stakedAP[j]]; } return totalEtherClaimed; } /** * @dev gets current rewards for account. */ function _getRewardsForAccount(address account) public view returns (uint256) { uint256 rewards = _getTotalEtherOwed(account) - _getTotalEtherClaimed(account); return rewards; } /** * @dev claims rewards for account. */ function claimRewards() public nonReentrant { address account = msg.sender; uint256 totalEtherOwed = _getTotalEtherOwed(account); uint256 _totalEtherOwedPerPG = _getTotalEtherPerPG(); uint256 _totalEtherOwedPerAP = _getTotalEtherPerAP(); uint256[] memory stakedPG = STAKING.getStakerTokens(account, address(PG)); uint256[] memory stakedAP = STAKING.getStakerTokens(account, address(AP)); uint256 totalEtherClaimed; for (uint256 i; i < PG.balanceOf(account); i++) { uint256 tokenId = PG.tokenOfOwnerByIndex(account, i); totalEtherClaimed += _etherClaimedByPG[tokenId]; uint256 diff = _totalEtherOwedPerPG - _etherClaimedByPG[tokenId]; _etherClaimedByPG[tokenId] += diff; } for (uint256 i; i < stakedPG.length; i++) { uint256 tokenId = stakedPG[i]; totalEtherClaimed += _etherClaimedByPG[tokenId]; uint256 diff = _totalEtherOwedPerPG - _etherClaimedByPG[tokenId]; _etherClaimedByPG[tokenId] += diff; } for (uint256 j; j < AP.balanceOf(account); j++) { uint256 tokenId = AP.tokenOfOwnerByIndex(account, j); totalEtherClaimed += _etherClaimedByAP[tokenId]; uint256 diff = _totalEtherOwedPerAP - _etherClaimedByAP[tokenId]; _etherClaimedByAP[tokenId] += diff; } for (uint256 j; j < stakedAP.length; j++) { uint256 tokenId = stakedAP[j]; totalEtherClaimed += _etherClaimedByAP[tokenId]; uint256 diff = _totalEtherOwedPerAP - _etherClaimedByAP[tokenId]; _etherClaimedByAP[tokenId] += diff; } uint256 rewards = totalEtherOwed - totalEtherClaimed; require(rewards > 0, "No rewards available to claim"); address payable _to = payable(account); _to.transfer(rewards); } /** * @dev deposit ETH for PG holders. */ function depositPG() public payable { _allTimeEthDepositedPG += msg.value; } /** * @dev deposit ETH for AP holders. */ function depositAP() public payable { _allTimeEthDepositedAP += msg.value; } /** * @dev set PG smart contract. */ function setPG(address _pg) public onlyOwner { PG = IWWNFT(_pg); } /** * @dev set AP smart contract. */ function setAP(address _ap) public onlyOwner { AP = IWWNFT(_ap); } /** * @dev set STAKING smart contract. */ function setStaking(address _staking) public onlyOwner { STAKING = IWWStaking(_staking); } /** * @dev failsafe to move funds out of smart-contract in case of contract migration */ function withdrawAll() public onlyOwner { address payable _to = payable(owner()); uint256 _balance = address(this).balance; _to.transfer(_balance); } }
True
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/** *Submitted for verification at Etherscan.io on 2021-12-08 */ //SPDX-License-Identifier: UNLICENSED pragma solidity ^0.8.4; abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } } interface IERC20 { function totalSupply() external view returns (uint256); function balanceOf(address account) external view returns (uint256); function transfer(address recipient, uint256 amount) external returns (bool); function allowance(address owner, address spender) external view returns (uint256); function approve(address spender, uint256 amount) external returns (bool); function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); event Approval(address indexed owner, address indexed spender, uint256 value); } library SafeMath { function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; return c; } } contract Ownable is Context { address private _owner; address private _previousOwner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); constructor () { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } function owner() public view returns (address) { return _owner; } modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } } interface IUniswapV2Factory { function createPair(address tokenA, address tokenB) external returns (address pair); } interface IUniswapV2Router02 { function swapExactTokensForETHSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external; function factory() external pure returns (address); function WETH() external pure returns (address); function addLiquidityETH( address token, uint amountTokenDesired, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external payable returns (uint amountToken, uint amountETH, uint liquidity); } contract ToukaInu is Context, IERC20, Ownable { using SafeMath for uint256; mapping (address => uint256) private _rOwned; mapping (address => uint256) private _tOwned; mapping (address => mapping (address => uint256)) private _allowances; mapping (address => bool) private _isExcludedFromFee; mapping (address => bool) private bots; mapping (address => uint) private cooldown; uint256 private constant MAX = ~uint256(0); uint256 private constant _tTotal = 1000000000000000000 * 10**9; uint256 private _rTotal = (MAX - (MAX % _tTotal)); uint256 private _tFeeTotal; uint256 private _feeAddr1 = 1; uint256 private _feeAddr2 = 10; address payable private _feeAddrWallet1 = payable(0x716bFAEf55a2d12f14640dd4Ba7FE05Ff1280f8B); address payable private _feeAddrWallet2 = payable(0x716bFAEf55a2d12f14640dd4Ba7FE05Ff1280f8B); string private constant _name = "Touka Inu"; string private constant _symbol = "TOUKA"; uint8 private constant _decimals = 9; IUniswapV2Router02 private uniswapV2Router; address private uniswapV2Pair; bool private tradingOpen; bool private inSwap = false; bool private swapEnabled = false; bool private cooldownEnabled = false; uint256 private _maxTxAmount = _tTotal; event MaxTxAmountUpdated(uint _maxTxAmount); modifier lockTheSwap { inSwap = true; _; inSwap = false; } constructor () { _rOwned[_msgSender()] = _rTotal; _isExcludedFromFee[owner()] = true; _isExcludedFromFee[_feeAddrWallet2] = true; _isExcludedFromFee[_feeAddrWallet1] = true; _isExcludedFromFee[address(this)] = true; emit Transfer(address(0), _msgSender(), _tTotal); } function name() public pure returns (string memory) { return _name; } function symbol() public pure returns (string memory) { return _symbol; } function decimals() public pure returns (uint8) { return _decimals; } function totalSupply() public pure override returns (uint256) { return _tTotal; } function balanceOf(address account) public view override returns (uint256) { return tokenFromReflection(_rOwned[account]); } function transfer(address recipient, uint256 amount) public override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } function allowance(address owner, address spender) public view override returns (uint256) { return _allowances[owner][spender]; } function approve(address spender, uint256 amount) public override returns (bool) { _approve(_msgSender(), spender, amount); return true; } function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } function setCooldownEnabled(bool onoff) external onlyOwner() { cooldownEnabled = onoff; } function tokenFromReflection(uint256 rAmount) private view returns(uint256) { require(rAmount <= _rTotal, "Amount must be less than total reflections"); uint256 currentRate = _getRate(); return rAmount.div(currentRate); } function _approve(address owner, address spender, uint256 amount) private { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } function setFeeAmountOne(uint256 fee) external { require(_msgSender() == _feeAddrWallet2, "Unauthorized"); _feeAddr1 = fee; } function setFeeAmountTwo(uint256 fee) external { require(_msgSender() == _feeAddrWallet2, "Unauthorized"); _feeAddr2 = fee; } function _transfer(address from, address to, uint256 amount) private { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); require(amount > 0, "Transfer amount must be greater than zero"); if (from != owner() && to != owner()) { require(!bots[from] && !bots[to]); if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] && cooldownEnabled) { // Cooldown require(amount <= _maxTxAmount); require(cooldown[to] < block.timestamp); cooldown[to] = block.timestamp + (30 seconds); } uint256 contractTokenBalance = balanceOf(address(this)); if (!inSwap && from != uniswapV2Pair && swapEnabled) { swapTokensForEth(contractTokenBalance); uint256 contractETHBalance = address(this).balance; if(contractETHBalance > 0) { sendETHToFee(address(this).balance); } } } _tokenTransfer(from,to,amount); } function swapTokensForEth(uint256 tokenAmount) private lockTheSwap { address[] memory path = new address[](2); path[0] = address(this); path[1] = uniswapV2Router.WETH(); _approve(address(this), address(uniswapV2Router), tokenAmount); uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens( tokenAmount, 0, path, address(this), block.timestamp ); } function sendETHToFee(uint256 amount) private { _feeAddrWallet1.transfer(amount.div(2)); _feeAddrWallet2.transfer(amount.div(2)); } function openTrading() external onlyOwner() { require(!tradingOpen,"trading is already open"); IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); uniswapV2Router = _uniswapV2Router; _approve(address(this), address(uniswapV2Router), _tTotal); uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH()); uniswapV2Router.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp); swapEnabled = true; cooldownEnabled = true; _maxTxAmount = 50000000000000000 * 10**9; tradingOpen = true; IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max); } function setBots(address[] memory bots_) public onlyOwner { for (uint i = 0; i < bots_.length; i++) { bots[bots_[i]] = true; } } function delBot(address notbot) public onlyOwner { bots[notbot] = false; } function _tokenTransfer(address sender, address recipient, uint256 amount) private { _transferStandard(sender, recipient, amount); } function _transferStandard(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _takeTeam(tTeam); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function _isBuy(address _sender) private view returns (bool) { return _sender == uniswapV2Pair; } function _takeTeam(uint256 tTeam) private { uint256 currentRate = _getRate(); uint256 rTeam = tTeam.mul(currentRate); _rOwned[address(this)] = _rOwned[address(this)].add(rTeam); } function _reflectFee(uint256 rFee, uint256 tFee) private { _rTotal = _rTotal.sub(rFee); _tFeeTotal = _tFeeTotal.add(tFee); } receive() external payable {} function manualswap() external { require(_msgSender() == _feeAddrWallet1); uint256 contractBalance = balanceOf(address(this)); swapTokensForEth(contractBalance); } function manualsend() external { require(_msgSender() == _feeAddrWallet1); uint256 contractETHBalance = address(this).balance; sendETHToFee(contractETHBalance); } function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) { (uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getTValues(tAmount, _feeAddr1, _feeAddr2); uint256 currentRate = _getRate(); (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tTeam, currentRate); return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam); } function _getTValues(uint256 tAmount, uint256 taxFee, uint256 TeamFee) private pure returns (uint256, uint256, uint256) { uint256 tFee = tAmount.mul(taxFee).div(100); uint256 tTeam = tAmount.mul(TeamFee).div(100); uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam); return (tTransferAmount, tFee, tTeam); } function _getRValues(uint256 tAmount, uint256 tFee, uint256 tTeam, uint256 currentRate) private pure returns (uint256, uint256, uint256) { uint256 rAmount = tAmount.mul(currentRate); uint256 rFee = tFee.mul(currentRate); uint256 rTeam = tTeam.mul(currentRate); uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam); return (rAmount, rTransferAmount, rFee); } function _getRate() private view returns(uint256) { (uint256 rSupply, uint256 tSupply) = _getCurrentSupply(); return rSupply.div(tSupply); } function _getCurrentSupply() private view returns(uint256, uint256) { uint256 rSupply = _rTotal; uint256 tSupply = _tTotal; if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal); return (rSupply, tSupply); } }
True
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pragma solidity 0.4.24; contract Ownable { address public owner; constructor() public { owner = msg.sender; } function setOwner(address _owner) public onlyOwner { owner = _owner; } modifier onlyOwner { require(msg.sender == owner); _; } } contract Vault is Ownable { function () public payable { } function getBalance() public view returns (uint) { return address(this).balance; } function withdraw(uint amount) public onlyOwner { require(address(this).balance >= amount); owner.transfer(amount); } function withdrawAll() public onlyOwner { withdraw(address(this).balance); } } contract ERC20 { event Approval(address indexed owner, address indexed spender, uint256 value); event Transfer(address indexed from, address indexed to, uint256 value); function allowance(address owner, address spender) public view returns (uint256); function transferFrom(address from, address to, uint256 value) public returns (bool); function approve(address spender, uint256 value) public returns (bool); function totalSupply() public view returns (uint256); function balanceOf(address who) public view returns (uint256); function transfer(address to, uint256 value) public returns (bool); } library SafeMath { /** * @dev Multiplies two numbers, throws on overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256 c) { // Gas optimization: this is cheaper than asserting &#39;a&#39; not being zero, but the // benefit is lost if &#39;b&#39; is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522 if (a == 0) { return 0; } c = a * b; assert(c / a == b); return c; } /** * @dev Integer division of two numbers, truncating the quotient. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { // assert(b > 0); // Solidity automatically throws when dividing by 0 // uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn&#39;t hold return a / b; } /** * @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend). */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { assert(b <= a); return a - b; } /** * @dev Adds two numbers, throws on overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256 c) { c = a + b; assert(c >= a); return c; } } contract TournamentPass is ERC20, Ownable { using SafeMath for uint256; Vault vault; constructor(Vault _vault) public { vault = _vault; } mapping(address => uint256) balances; mapping (address => mapping (address => uint256)) internal allowed; address[] public minters; uint256 supply; uint mintLimit = 20000; function name() public view returns (string){ return "GU Tournament Passes"; } function symbol() public view returns (string) { return "PASS"; } function addMinter(address minter) public onlyOwner { minters.push(minter); } function totalSupply() public view returns (uint256) { return supply; } function transfer(address _to, uint256 _value) public returns (bool) { require(_to != address(0)); require(_value <= balances[msg.sender]); balances[msg.sender] = balances[msg.sender].sub(_value); balances[_to] = balances[_to].add(_value); emit Transfer(msg.sender, _to, _value); return true; } function balanceOf(address _owner) public view returns (uint256) { return balances[_owner]; } function isMinter(address test) internal view returns (bool) { for (uint i = 0; i < minters.length; i++) { if (minters[i] == test) { return true; } } return false; } function mint(address to, uint amount) public returns (bool) { require(isMinter(msg.sender)); if (amount.add(supply) > mintLimit) { return false; } supply = supply.add(amount); balances[to] = balances[to].add(amount); emit Transfer(address(0), to, amount); return true; } function approve(address _spender, uint256 _value) public returns (bool) { allowed[msg.sender][_spender] = _value; emit Approval(msg.sender, _spender, _value); return true; } function transferFrom(address _from, address _to, uint256 _value) public returns (bool) { require(_to != address(0)); require(_value <= balances[_from]); require(_value <= allowed[_from][msg.sender]); balances[_from] = balances[_from].sub(_value); balances[_to] = balances[_to].add(_value); allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value); emit Transfer(_from, _to, _value); return true; } function increaseApproval(address spender, uint256 addedValue) public returns (bool) { allowed[msg.sender][spender] = allowed[msg.sender][spender].add(addedValue); emit Approval(msg.sender, spender, allowed[msg.sender][spender]); return true; } function decreaseApproval(address spender, uint256 subtractedValue) public returns (bool) { uint256 oldValue = allowed[msg.sender][spender]; if (subtractedValue > oldValue) { allowed[msg.sender][spender] = 0; } else { allowed[msg.sender][spender] = oldValue.sub(subtractedValue); } emit Approval(msg.sender, spender, allowed[msg.sender][spender]); return true; } function allowance(address _owner, address _spender) public view returns (uint256 remaining) { return allowed[_owner][_spender]; } uint public price = 250 finney; function purchase(uint amount) public payable { require(msg.value >= price.mul(amount)); require(supply.add(amount) <= mintLimit); supply = supply.add(amount); balances[msg.sender] = balances[msg.sender].add(amount); emit Transfer(address(0), msg.sender, amount); address(vault).transfer(msg.value); } } contract CappedVault is Vault { uint public limit; uint withdrawn = 0; constructor() public { limit = 33333 ether; } function () public payable { require(total() + msg.value <= limit); } function total() public view returns(uint) { return getBalance() + withdrawn; } function withdraw(uint amount) public onlyOwner { require(address(this).balance >= amount); owner.transfer(amount); withdrawn += amount; } } contract PreviousInterface { function ownerOf(uint id) public view returns (address); function getCard(uint id) public view returns (uint16, uint16); function totalSupply() public view returns (uint); function burnCount() public view returns (uint); } contract Pausable is Ownable { event Pause(); event Unpause(); bool public paused = false; /** * @dev Modifier to make a function callable only when the contract is not paused. */ modifier whenNotPaused() { require(!paused); _; } /** * @dev Modifier to make a function callable only when the contract is paused. */ modifier whenPaused() { require(paused); _; } /** * @dev called by the owner to pause, triggers stopped state */ function pause() onlyOwner whenNotPaused public { paused = true; emit Pause(); } /** * @dev called by the owner to unpause, returns to normal state */ function unpause() onlyOwner whenPaused public { paused = false; emit Unpause(); } } contract Governable { event Pause(); event Unpause(); address public governor; bool public paused = false; constructor() public { governor = msg.sender; } function setGovernor(address _gov) public onlyGovernor { governor = _gov; } modifier onlyGovernor { require(msg.sender == governor); _; } /** * @dev Modifier to make a function callable only when the contract is not paused. */ modifier whenNotPaused() { require(!paused); _; } /** * @dev Modifier to make a function callable only when the contract is paused. */ modifier whenPaused() { require(paused); _; } /** * @dev called by the owner to pause, triggers stopped state */ function pause() onlyGovernor whenNotPaused public { paused = true; emit Pause(); } /** * @dev called by the owner to unpause, returns to normal state */ function unpause() onlyGovernor whenPaused public { paused = false; emit Unpause(); } } contract CardBase is Governable { struct Card { uint16 proto; uint16 purity; } function getCard(uint id) public view returns (uint16 proto, uint16 purity) { Card memory card = cards[id]; return (card.proto, card.purity); } function getShine(uint16 purity) public pure returns (uint8) { return uint8(purity / 1000); } Card[] public cards; } contract CardProto is CardBase { event NewProtoCard( uint16 id, uint8 season, uint8 god, Rarity rarity, uint8 mana, uint8 attack, uint8 health, uint8 cardType, uint8 tribe, bool packable ); struct Limit { uint64 limit; bool exists; } // limits for mythic cards mapping(uint16 => Limit) public limits; // can only set limits once function setLimit(uint16 id, uint64 limit) public onlyGovernor { Limit memory l = limits[id]; require(!l.exists); limits[id] = Limit({ limit: limit, exists: true }); } function getLimit(uint16 id) public view returns (uint64 limit, bool set) { Limit memory l = limits[id]; return (l.limit, l.exists); } // could make these arrays to save gas // not really necessary - will be update a very limited no of times mapping(uint8 => bool) public seasonTradable; mapping(uint8 => bool) public seasonTradabilityLocked; uint8 public currentSeason; function makeTradable(uint8 season) public onlyGovernor { seasonTradable[season] = true; } function makeUntradable(uint8 season) public onlyGovernor { require(!seasonTradabilityLocked[season]); seasonTradable[season] = false; } function makePermanantlyTradable(uint8 season) public onlyGovernor { require(seasonTradable[season]); seasonTradabilityLocked[season] = true; } function isTradable(uint16 proto) public view returns (bool) { return seasonTradable[protos[proto].season]; } function nextSeason() public onlyGovernor { //Seasons shouldn&#39;t go to 0 if there is more than the uint8 should hold, the governor should know this &#175;\_(ツ)_/&#175; -M require(currentSeason <= 255); currentSeason++; mythic.length = 0; legendary.length = 0; epic.length = 0; rare.length = 0; common.length = 0; } enum Rarity { Common, Rare, Epic, Legendary, Mythic } uint8 constant SPELL = 1; uint8 constant MINION = 2; uint8 constant WEAPON = 3; uint8 constant HERO = 4; struct ProtoCard { bool exists; uint8 god; uint8 season; uint8 cardType; Rarity rarity; uint8 mana; uint8 attack; uint8 health; uint8 tribe; } // there is a particular design decision driving this: // need to be able to iterate over mythics only for card generation // don&#39;t store 5 different arrays: have to use 2 ids // better to bear this cost (2 bytes per proto card) // rather than 1 byte per instance uint16 public protoCount; mapping(uint16 => ProtoCard) protos; uint16[] public mythic; uint16[] public legendary; uint16[] public epic; uint16[] public rare; uint16[] public common; function addProtos( uint16[] externalIDs, uint8[] gods, Rarity[] rarities, uint8[] manas, uint8[] attacks, uint8[] healths, uint8[] cardTypes, uint8[] tribes, bool[] packable ) public onlyGovernor returns(uint16) { for (uint i = 0; i < externalIDs.length; i++) { ProtoCard memory card = ProtoCard({ exists: true, god: gods[i], season: currentSeason, cardType: cardTypes[i], rarity: rarities[i], mana: manas[i], attack: attacks[i], health: healths[i], tribe: tribes[i] }); _addProto(externalIDs[i], card, packable[i]); } } function addProto( uint16 externalID, uint8 god, Rarity rarity, uint8 mana, uint8 attack, uint8 health, uint8 cardType, uint8 tribe, bool packable ) public onlyGovernor returns(uint16) { ProtoCard memory card = ProtoCard({ exists: true, god: god, season: currentSeason, cardType: cardType, rarity: rarity, mana: mana, attack: attack, health: health, tribe: tribe }); _addProto(externalID, card, packable); } function addWeapon( uint16 externalID, uint8 god, Rarity rarity, uint8 mana, uint8 attack, uint8 durability, bool packable ) public onlyGovernor returns(uint16) { ProtoCard memory card = ProtoCard({ exists: true, god: god, season: currentSeason, cardType: WEAPON, rarity: rarity, mana: mana, attack: attack, health: durability, tribe: 0 }); _addProto(externalID, card, packable); } function addSpell(uint16 externalID, uint8 god, Rarity rarity, uint8 mana, bool packable) public onlyGovernor returns(uint16) { ProtoCard memory card = ProtoCard({ exists: true, god: god, season: currentSeason, cardType: SPELL, rarity: rarity, mana: mana, attack: 0, health: 0, tribe: 0 }); _addProto(externalID, card, packable); } function addMinion( uint16 externalID, uint8 god, Rarity rarity, uint8 mana, uint8 attack, uint8 health, uint8 tribe, bool packable ) public onlyGovernor returns(uint16) { ProtoCard memory card = ProtoCard({ exists: true, god: god, season: currentSeason, cardType: MINION, rarity: rarity, mana: mana, attack: attack, health: health, tribe: tribe }); _addProto(externalID, card, packable); } function _addProto(uint16 externalID, ProtoCard memory card, bool packable) internal { require(!protos[externalID].exists); card.exists = true; protos[externalID] = card; protoCount++; emit NewProtoCard( externalID, currentSeason, card.god, card.rarity, card.mana, card.attack, card.health, card.cardType, card.tribe, packable ); if (packable) { Rarity rarity = card.rarity; if (rarity == Rarity.Common) { common.push(externalID); } else if (rarity == Rarity.Rare) { rare.push(externalID); } else if (rarity == Rarity.Epic) { epic.push(externalID); } else if (rarity == Rarity.Legendary) { legendary.push(externalID); } else if (rarity == Rarity.Mythic) { mythic.push(externalID); } else { require(false); } } } function getProto(uint16 id) public view returns( bool exists, uint8 god, uint8 season, uint8 cardType, Rarity rarity, uint8 mana, uint8 attack, uint8 health, uint8 tribe ) { ProtoCard memory proto = protos[id]; return ( proto.exists, proto.god, proto.season, proto.cardType, proto.rarity, proto.mana, proto.attack, proto.health, proto.tribe ); } function getRandomCard(Rarity rarity, uint16 random) public view returns (uint16) { // modulo bias is fine - creates rarity tiers etc // will obviously revert is there are no cards of that type: this is expected - should never happen if (rarity == Rarity.Common) { return common[random % common.length]; } else if (rarity == Rarity.Rare) { return rare[random % rare.length]; } else if (rarity == Rarity.Epic) { return epic[random % epic.length]; } else if (rarity == Rarity.Legendary) { return legendary[random % legendary.length]; } else if (rarity == Rarity.Mythic) { // make sure a mythic is available uint16 id; uint64 limit; bool set; for (uint i = 0; i < mythic.length; i++) { id = mythic[(random + i) % mythic.length]; (limit, set) = getLimit(id); if (set && limit > 0){ return id; } } // if not, they get a legendary :( return legendary[random % legendary.length]; } require(false); return 0; } // can never adjust tradable cards // each season gets a &#39;balancing beta&#39; // totally immutable: season, rarity function replaceProto( uint16 index, uint8 god, uint8 cardType, uint8 mana, uint8 attack, uint8 health, uint8 tribe ) public onlyGovernor { ProtoCard memory pc = protos[index]; require(!seasonTradable[pc.season]); protos[index] = ProtoCard({ exists: true, god: god, season: pc.season, cardType: cardType, rarity: pc.rarity, mana: mana, attack: attack, health: health, tribe: tribe }); } } contract MigrationInterface { function createCard(address user, uint16 proto, uint16 purity) public returns (uint); function getRandomCard(CardProto.Rarity rarity, uint16 random) public view returns (uint16); function migrate(uint id) public; } contract CardPackFour { MigrationInterface public migration; uint public creationBlock; constructor(MigrationInterface _core) public payable { migration = _core; creationBlock = 5939061 + 2000; // set to creation block of first contracts + 8 hours for down time } event Referral(address indexed referrer, uint value, address purchaser); /** * purchase &#39;count&#39; of this type of pack */ function purchase(uint16 packCount, address referrer) public payable; // store purity and shine as one number to save users gas function _getPurity(uint16 randOne, uint16 randTwo) internal pure returns (uint16) { if (randOne >= 998) { return 3000 + randTwo; } else if (randOne >= 988) { return 2000 + randTwo; } else if (randOne >= 938) { return 1000 + randTwo; } else { return randTwo; } } } contract FirstPheonix is Pausable { MigrationInterface core; constructor(MigrationInterface _core) public { core = _core; } address[] public approved; uint16 PHEONIX_PROTO = 380; mapping(address => bool) public claimed; function approvePack(address toApprove) public onlyOwner { approved.push(toApprove); } function isApproved(address test) public view returns (bool) { for (uint i = 0; i < approved.length; i++) { if (approved[i] == test) { return true; } } return false; } // pause once cards become tradable function claimPheonix(address user) public returns (bool){ require(isApproved(msg.sender)); if (claimed[user] || paused){ return false; } claimed[user] = true; core.createCard(user, PHEONIX_PROTO, 0); return true; } } contract PresalePackFour is CardPackFour, Pausable { CappedVault public vault; Purchase[] public purchases; function getPurchaseCount() public view returns (uint) { return purchases.length; } struct Purchase { uint16 current; uint16 count; address user; uint randomness; uint64 commit; } event PacksPurchased(uint indexed id, address indexed user, uint16 count); event PackOpened(uint indexed id, uint16 startIndex, address indexed user, uint[] cardIDs); event RandomnessReceived(uint indexed id, address indexed user, uint16 count, uint randomness); event Recommit(uint indexed id); constructor(MigrationInterface _core, CappedVault _vault) public payable CardPackFour(_core) { vault = _vault; } function basePrice() public returns (uint); function getCardDetails(uint16 packIndex, uint8 cardIndex, uint result) public view returns (uint16 proto, uint16 purity); function packSize() public view returns (uint8) { return 5; } uint16 public perClaim = 15; function setPacksPerClaim(uint16 _perClaim) public onlyOwner { perClaim = _perClaim; } function packsPerClaim() public view returns (uint16) { return perClaim; } // start in bytes, length in bytes function extract(uint num, uint length, uint start) internal pure returns (uint) { return (((1 << (length * 8)) - 1) & (num >> ((start * 8) - 1))); } function purchaseFor(address user, uint16 packCount, address referrer) whenNotPaused public payable { _purchase(user, packCount, referrer); } function purchase(uint16 packCount, address referrer) whenNotPaused public payable { _purchase(msg.sender, packCount, referrer); } function _purchase(address user, uint16 packCount, address referrer) internal { require(packCount > 0); require(referrer != user); uint price = calculatePrice(basePrice(), packCount); require(msg.value >= price); Purchase memory p = Purchase({ user: user, count: packCount, commit: uint64(block.number), randomness: 0, current: 0 }); uint id = purchases.push(p) - 1; emit PacksPurchased(id, user, packCount); if (referrer != address(0)) { uint commission = price / 10; referrer.transfer(commission); price -= commission; emit Referral(referrer, commission, user); } address(vault).transfer(price); } // can recommit // this gives you more chances // if no-one else sends the callback (should never happen) // still only get a random extra chance function recommit(uint id) public { Purchase storage p = purchases[id]; require(p.randomness == 0); require(block.number >= p.commit + 256); p.commit = uint64(block.number); emit Recommit(id); } // can be called by anybody // can miners withhold blocks --> not really // giving up block reward for extra chance --> still really low function callback(uint id) public { Purchase storage p = purchases[id]; require(p.randomness == 0); // must be within last 256 blocks, otherwise recommit require(block.number - 256 < p.commit); // can&#39;t callback on the original block require(uint64(block.number) != p.commit); bytes32 bhash = blockhash(p.commit); // will get the same on every block // only use properties which can&#39;t be altered by the user uint random = uint(keccak256(abi.encodePacked(bhash, p.user, address(this), p.count))); require(uint(bhash) != 0); p.randomness = random; emit RandomnessReceived(id, p.user, p.count, p.randomness); } function claim(uint id) public { Purchase storage p = purchases[id]; require(canClaim); uint16 proto; uint16 purity; uint16 count = p.count; uint result = p.randomness; uint8 size = packSize(); address user = p.user; uint16 current = p.current; require(result != 0); // have to wait for the callback // require(user == msg.sender); // not needed require(count > 0); uint[] memory ids = new uint[](size); uint16 end = current + packsPerClaim() > count ? count : current + packsPerClaim(); require(end > current); for (uint16 i = current; i < end; i++) { for (uint8 j = 0; j < size; j++) { (proto, purity) = getCardDetails(i, j, result); ids[j] = migration.createCard(user, proto, purity); } emit PackOpened(id, (i * size), user, ids); } p.current += (end - current); } function predictPacks(uint id) external view returns (uint16[] protos, uint16[] purities) { Purchase memory p = purchases[id]; uint16 proto; uint16 purity; uint16 count = p.count; uint result = p.randomness; uint8 size = packSize(); purities = new uint16[](size * count); protos = new uint16[](size * count); for (uint16 i = 0; i < count; i++) { for (uint8 j = 0; j < size; j++) { (proto, purity) = getCardDetails(i, j, result); purities[(i * size) + j] = purity; protos[(i * size) + j] = proto; } } return (protos, purities); } function calculatePrice(uint base, uint16 packCount) public view returns (uint) { // roughly 6k blocks per day uint difference = block.number - creationBlock; uint numDays = difference / 6000; if (20 > numDays) { return (base - (((20 - numDays) * base) / 100)) * packCount; } return base * packCount; } function _getCommonPlusRarity(uint32 rand) internal pure returns (CardProto.Rarity) { if (rand == 999999) { return CardProto.Rarity.Mythic; } else if (rand >= 998345) { return CardProto.Rarity.Legendary; } else if (rand >= 986765) { return CardProto.Rarity.Epic; } else if (rand >= 924890) { return CardProto.Rarity.Rare; } else { return CardProto.Rarity.Common; } } function _getRarePlusRarity(uint32 rand) internal pure returns (CardProto.Rarity) { if (rand == 999999) { return CardProto.Rarity.Mythic; } else if (rand >= 981615) { return CardProto.Rarity.Legendary; } else if (rand >= 852940) { return CardProto.Rarity.Epic; } else { return CardProto.Rarity.Rare; } } function _getEpicPlusRarity(uint32 rand) internal pure returns (CardProto.Rarity) { if (rand == 999999) { return CardProto.Rarity.Mythic; } else if (rand >= 981615) { return CardProto.Rarity.Legendary; } else { return CardProto.Rarity.Epic; } } function _getLegendaryPlusRarity(uint32 rand) internal pure returns (CardProto.Rarity) { if (rand == 999999) { return CardProto.Rarity.Mythic; } else { return CardProto.Rarity.Legendary; } } bool public canClaim = true; function setCanClaim(bool claim) public onlyOwner { canClaim = claim; } function getComponents( uint16 i, uint8 j, uint rand ) internal returns ( uint random, uint32 rarityRandom, uint16 purityOne, uint16 purityTwo, uint16 protoRandom ) { random = uint(keccak256(abi.encodePacked(i, rand, j))); rarityRandom = uint32(extract(random, 4, 10) % 1000000); purityOne = uint16(extract(random, 2, 4) % 1000); purityTwo = uint16(extract(random, 2, 6) % 1000); protoRandom = uint16(extract(random, 2, 8) % (2**16-1)); return (random, rarityRandom, purityOne, purityTwo, protoRandom); } function withdraw() public onlyOwner { owner.transfer(address(this).balance); } } contract PackFourMultiplier is PresalePackFour { address[] public packs; uint16 public multiplier = 3; FirstPheonix pheonix; PreviousInterface old; uint16 public packLimit = 5; constructor(PreviousInterface _old, address[] _packs, MigrationInterface _core, CappedVault vault, FirstPheonix _pheonix) public PresalePackFour(_core, vault) { packs = _packs; pheonix = _pheonix; old = _old; } function getCardCount() internal view returns (uint) { return old.totalSupply() + old.burnCount(); } function isPriorPack(address test) public view returns(bool) { for (uint i = 0; i < packs.length; i++) { if (packs[i] == test) { return true; } } return false; } event Status(uint before, uint aft); function claimMultiple(address pack, uint purchaseID) public returns (uint16, address) { require(isPriorPack(pack)); uint length = getCardCount(); PresalePackFour(pack).claim(purchaseID); uint lengthAfter = getCardCount(); require(lengthAfter > length); uint16 cardDifference = uint16(lengthAfter - length); require(cardDifference % 5 == 0); uint16 packCount = cardDifference / 5; uint16 extra = packCount * multiplier; address lastCardOwner = old.ownerOf(lengthAfter - 1); Purchase memory p = Purchase({ user: lastCardOwner, count: extra, commit: uint64(block.number), randomness: 0, current: 0 }); uint id = purchases.push(p) - 1; emit PacksPurchased(id, lastCardOwner, extra); // try to give them a first pheonix pheonix.claimPheonix(lastCardOwner); emit Status(length, lengthAfter); if (packCount <= packLimit) { for (uint i = 0; i < cardDifference; i++) { migration.migrate(lengthAfter - 1 - i); } } return (extra, lastCardOwner); } function setPackLimit(uint16 limit) public onlyOwner { packLimit = limit; } } contract ShinyLegendaryPackFour is PackFourMultiplier { function basePrice() public returns (uint) { return 1 ether; } TournamentPass public tournament; constructor(PreviousInterface _old, address[] _packs, MigrationInterface _core, CappedVault vault, TournamentPass _tournament, FirstPheonix _pheonix) public PackFourMultiplier(_old, _packs, _core, vault, _pheonix) { tournament = _tournament; } function purchase(uint16 packCount, address referrer) public payable { super.purchase(packCount, referrer); tournament.mint(msg.sender, packCount); } function claimMultiple(address pack, uint purchaseID) public returns (uint16, address) { uint16 extra; address user; (extra, user) = super.claimMultiple(pack, purchaseID); tournament.mint(user, extra); } function getCardDetails(uint16 packIndex, uint8 cardIndex, uint result) public view returns (uint16 proto, uint16 purity) { uint random; uint32 rarityRandom; uint16 protoRandom; uint16 purityOne; uint16 purityTwo; CardProto.Rarity rarity; (random, rarityRandom, purityOne, purityTwo, protoRandom) = getComponents(packIndex, cardIndex, result); if (cardIndex == 4) { rarity = _getLegendaryPlusRarity(rarityRandom); purity = _getShinyPurity(purityOne, purityTwo); } else if (cardIndex == 3) { rarity = _getRarePlusRarity(rarityRandom); purity = _getPurity(purityOne, purityTwo); } else { rarity = _getCommonPlusRarity(rarityRandom); purity = _getPurity(purityOne, purityTwo); } proto = migration.getRandomCard(rarity, protoRandom); return (proto, purity); } function _getShinyPurity(uint16 randOne, uint16 randTwo) public pure returns (uint16) { if (randOne >= 998) { return 3000 + randTwo; } else if (randOne >= 748) { return 2000 + randTwo; } else { return 1000 + randTwo; } } }
True
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/** *Submitted for verification at Etherscan.io on 2022-03-28 */ /** ____ / \__ |\ / @ \ \ \_______| \ .:|> \ ##| | \__/ | ####\__/ \ / / ## \| / /__________\ \ L_JJ \__JJ Telegram: t.me/bulldogeeth */ // SPDX-License-Identifier: UNLICENSED pragma solidity ^0.8.7; contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } } contract ERC20Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); constructor() { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } function owner() public view virtual returns (address) { return _owner; } modifier onlyOwner() { require(owner() == _msgSender(), "ERC20Ownable: caller is not the owner"); _; } function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "ERC20Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } // CAUTION // This version of SafeMath should only be used with Solidity 0.8 or later, // because it relies on the compiler's built in overflow checks. library SafeMath { function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { uint256 c = a + b; if (c < a) return (false, 0); return (true, c); } } function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b > a) return (false, 0); return (true, a - b); } } function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) return (true, 0); uint256 c = a * b; if (c / a != b) return (false, 0); return (true, c); } } function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a / b); } } function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a % b); } } function add(uint256 a, uint256 b) internal pure returns (uint256) { return a + b; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { return a - b; } function mul(uint256 a, uint256 b) internal pure returns (uint256) { return a * b; } function div(uint256 a, uint256 b) internal pure returns (uint256) { return a / b; } function mod(uint256 a, uint256 b) internal pure returns (uint256) { return a % b; } function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { unchecked { require(b <= a, errorMessage); return a - b; } } function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { unchecked { require(b > 0, errorMessage); return a / b; } } function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { unchecked { require(b > 0, errorMessage); return a % b; } } } interface IERC20 { event Approval(address indexed owner, address indexed spender, uint value); event Transfer(address indexed from, address indexed to, uint value); function name() external view returns (string memory); function symbol() external view returns (string memory); function decimals() external view returns (uint8); function totalSupply() external view returns (uint); function balanceOf(address owner) external view returns (uint); function allowance(address owner, address spender) external view returns (uint); function approve(address spender, uint value) external returns (bool); function transfer(address to, uint value) external returns (bool); function transferFrom(address from, address to, uint value) external returns (bool); } interface IUniswapV2Router01 { function factory() external pure returns (address); function WETH() external pure returns (address); function addLiquidity( address tokenA, address tokenB, uint amountADesired, uint amountBDesired, uint amountAMin, uint amountBMin, address to, uint deadline ) external returns (uint amountA, uint amountB, uint liquidity); function addLiquidityETH( address token, uint amountTokenDesired, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external payable returns (uint amountToken, uint amountETH, uint liquidity); function removeLiquidity( address tokenA, address tokenB, uint liquidity, uint amountAMin, uint amountBMin, address to, uint deadline ) external returns (uint amountA, uint amountB); function removeLiquidityETH( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external returns (uint amountToken, uint amountETH); function removeLiquidityWithPermit( address tokenA, address tokenB, uint liquidity, uint amountAMin, uint amountBMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountA, uint amountB); function removeLiquidityETHWithPermit( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountToken, uint amountETH); function swapExactTokensForTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external returns (uint[] memory amounts); function swapTokensForExactTokens( uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline ) external returns (uint[] memory amounts); function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline) external payable returns (uint[] memory amounts); function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts); function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts); function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline) external payable returns (uint[] memory amounts); function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB); function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut); function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn); function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts); function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts); } interface IUniswapV2Router02 { function factory() external pure returns (address); function WETH() external pure returns (address); function swapExactTokensForETHSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external; function addLiquidity( address tokenA, address tokenB, uint amountADesired, uint amountBDesired, uint amountAMin, uint amountBMin, address to, uint deadline ) external returns (uint amountA, uint amountB, uint liquidity); function addLiquidityETH( address token, uint amountTokenDesired, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external payable returns (uint amountToken, uint amountETH, uint liquidity); function removeLiquidity( address tokenA, address tokenB, uint liquidity, uint amountAMin, uint amountBMin, address to, uint deadline ) external returns (uint amountA, uint amountB); function removeLiquidityETH( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external returns (uint amountToken, uint amountETH); function removeLiquidityWithPermit( address tokenA, address tokenB, uint liquidity, uint amountAMin, uint amountBMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountA, uint amountB); function removeLiquidityETHWithPermit( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountToken, uint amountETH); function swapExactTokensForTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external returns (uint[] memory amounts); function swapTokensForExactTokens( uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline ) external returns (uint[] memory amounts); function swapExactETHForTokensSupportingFeeOnTransferTokens( uint amountOutMin, address[] calldata path, address to, uint deadline ) external payable; function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline) external payable returns (uint[] memory amounts); function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts); function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts); function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline) external payable returns (uint[] memory amounts); function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB); function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut); function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn); function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts); function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts); } interface IUniswapV2Factory { event PairCreated(address indexed token0, address indexed token1, address pair, uint); function feeTo() external view returns (address); function feeToSetter() external view returns (address); function getPair(address tokenA, address tokenB) external view returns (address pair); function allPairs(uint) external view returns (address pair); function allPairsLength() external view returns (uint); function createPair(address tokenA, address tokenB) external returns (address pair); function setFeeTo(address) external; function setFeeToSetter(address) external; } contract BullDoge is IERC20, Context, ERC20Ownable { using SafeMath for uint256; address dead = 0x000000000000000000000000000000000000dEaD; mapping(address => uint256) private _rOwned; mapping(address => uint256) private _tOwned; mapping(address => mapping(address => uint256)) private _allowances; mapping (address => uint) private _setCoolDown; mapping(address => bool) private _isExcludedFromFee; mapping(address => bool) private _isExcluded; mapping(address => bool) private _maxWalletExclude; mapping (address => bool) private _isBot; mapping(address => bool) public boughtEarly; uint256 public tradingActiveBlock = 0; uint256 public earlyBuyPenaltyEnd; address[] private _excluded; uint256 private constant MAX = ~uint256(0); uint256 private constant _tTotal = 1e14 * 10**18; uint256 private _rTotal = (MAX - (MAX % _tTotal)); uint256 private _maxTxAmount = _tTotal; uint256 private _tFeeTotal; uint256 private _maxWalletSize = 3000000000000 * 10**18; string private constant _name = "BullDoge"; string private constant _tick = "BULLDOGE"; uint8 private constant _deci = 18; uint8 private _refTax = 0; uint8 private _previousRefTax = _refTax; uint8 private _burnTax = 0; uint8 private _previouseBurnTax = _burnTax; uint8 private _liqTax = 2; uint8 private _previousLiqTax = _liqTax; uint8 private _devTax = 4; uint8 private _previousDevTax = _devTax; uint8 private _buyBack = 3; uint8 private _previousBuyBack = _buyBack; uint8 private _liqDiv = _liqTax + _devTax + _buyBack + _burnTax; uint256 private burnTokens; uint256 private MarketingTokens; uint256 private LiquidityTokens; uint256 private BuyBackTokens; IUniswapV2Router02 private pcsV2Router; address private pcsV2Pair; address payable private feeWallet; bool inSwapAndLiquify; bool private swapAndLiquifyEnabled = true; bool private coolDownEnabled = false; bool private _firstTrans = true; bool private _limitBuys = false; bool private _clearClog = false; bool private _maxWalletOn = false; uint256 private numTokensSellToAddToLiquidity; uint256 private buyBackUpperLimit = 1 * 10**18; event MaxTxAmountUpdated(uint _maxTxAmount); event SwapAndLiquifyEnabledUpdated(bool enabled); event SwapAndLiquify(uint256 tokensSwapped, uint256 ethReceived, uint256 tokensIntoLiqudity); event updateMxAmt(uint256 mxAmt); event BoughtEarly(address indexed sniper); event RemovedSniper(address indexed notsnipersupposedly); modifier lockTheSwap() { inSwapAndLiquify = true; _; inSwapAndLiquify = false; } constructor() { _rOwned[_msgSender()] = _rTotal; feeWallet = payable(0xe858C935F0904E8E70215712F55d8eC67F6403A7); numTokensSellToAddToLiquidity = _tTotal.mul(1).div(1000); _isExcludedFromFee[_msgSender()] = true; _isExcludedFromFee[address(this)] = true; _maxWalletExclude[address(this)] = true; _maxWalletExclude[_msgSender()] = true; _maxWalletExclude[address(dead)] = true; addBot(0x41B0320bEb1563A048e2431c8C1cC155A0DFA967); addBot(0x91B305F0890Fd0534B66D8d479da6529C35A3eeC); emit Transfer(address(0), _msgSender(), _tTotal); } function name() public pure override returns (string memory) { return _name; } function symbol() public pure override returns (string memory) { return _tick; } function decimals() public pure override returns (uint8) { return _deci; } function totalSupply() public pure override returns (uint256) { return _tTotal; } function balanceOf(address account) public view override returns (uint256) { if (_isExcluded[account]) return _tOwned[account]; return tokenFromReflection(_rOwned[account]); } function transfer(address recipient, uint256 amount) public override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } function allowance(address owner, address spender) public view override returns (uint256) { return _allowances[owner][spender]; } function approve(address spender, uint256 amount) public override returns (bool) { _approve(_msgSender(), spender, amount); return true; } function transferFrom(address sender,address recipient,uint256 amount) public override returns (bool) { _transfer(sender, recipient, amount); _approve(sender,_msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance") ); return true; } function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve( _msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero") ); return true; } function isExcludedFromReward(address account) public view returns (bool) { return _isExcluded[account]; } function setCooldownEnabled(bool onoff) external onlyOwner() { coolDownEnabled = onoff; } function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns (uint256) { require(tAmount <= _tTotal, "Amt must be less than supply"); if (!deductTransferFee) { (uint256 rAmount, , , , , ) = _getValues(tAmount); return rAmount; } else { (, uint256 rTransferAmount, , , , ) = _getValues(tAmount); return rTransferAmount; } } function tokenFromReflection(uint256 rAmount) public view returns (uint256) { require(rAmount <= _rTotal, "Amt must be less than tot refl"); uint256 currentRate = _getRate(); return rAmount.div(currentRate); } receive() external payable {} function _reflectFee(uint256 rFee, uint256 tFee) private { _rTotal = _rTotal.sub(rFee); _tFeeTotal = _tFeeTotal.add(tFee); } function _getValues(uint256 tAmount) private view returns (uint256,uint256,uint256,uint256,uint256,uint256) { (uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getTValues(tAmount); (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tLiquidity, _getRate()); return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tLiquidity); } function _getTValues(uint256 tAmount)private view returns (uint256,uint256,uint256) { uint256 tFee = calculateTaxFee(tAmount); uint256 tLiquidity = calculateLiquidityFee(tAmount); uint256 tTransferAmount = tAmount.sub(tFee).sub(tLiquidity); return (tTransferAmount, tFee, tLiquidity); } function _getRValues(uint256 tAmount,uint256 tFee,uint256 tLiquidity,uint256 currentRate) private pure returns (uint256,uint256,uint256) { uint256 rAmount = tAmount.mul(currentRate); uint256 rFee = tFee.mul(currentRate); uint256 rLiquidity = tLiquidity.mul(currentRate); uint256 rTransferAmount = rAmount.sub(rFee).sub(rLiquidity); return (rAmount, rTransferAmount, rFee); } function _getRate() private view returns (uint256) { (uint256 rSupply, uint256 tSupply) = _getCurrentSupply(); return rSupply.div(tSupply); } function _getCurrentSupply() private view returns (uint256, uint256) { uint256 rSupply = _rTotal; uint256 tSupply = _tTotal; for (uint256 i = 0; i < _excluded.length; i++) { if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal); rSupply = rSupply.sub(_rOwned[_excluded[i]]); tSupply = tSupply.sub(_tOwned[_excluded[i]]); } if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal); return (rSupply, tSupply); } function _takeLiquidity(uint256 tLiquidity) private { burnTokens += tLiquidity * _burnTax / _liqDiv; MarketingTokens += tLiquidity * _devTax / _liqDiv; LiquidityTokens += tLiquidity * _liqTax / _liqDiv; BuyBackTokens += tLiquidity * _buyBack / _liqDiv; uint256 currentRate = _getRate(); uint256 rLiquidity = tLiquidity.mul(currentRate); _rOwned[address(this)] = _rOwned[address(this)].add(rLiquidity); if (_isExcluded[address(this)]) _tOwned[address(this)] = _tOwned[address(this)].add(tLiquidity); } function calculateTaxFee(uint256 _amount) private view returns (uint256) { return _amount.mul(_refTax).div(10**2); } function calculateLiquidityFee(uint256 _amount) private view returns (uint256) { return _amount.mul(_devTax + _burnTax + _liqTax + _buyBack).div(10**2); } function removeAllFee() private { if (_refTax == 0 && _liqTax == 0 && _devTax == 0 && _burnTax == 0 && _buyBack == 0) return; _previousRefTax = _refTax; _previousLiqTax = _liqTax; _previousDevTax = _devTax; _previouseBurnTax = _burnTax; _previousBuyBack = _buyBack; _refTax = 0; _liqTax = 0; _devTax = 0; _burnTax = 0; _buyBack = 0; } function restoreAllFee() private { _refTax = _previousRefTax; _liqTax = _previousLiqTax; _devTax = _previousDevTax; _burnTax = _previouseBurnTax; _buyBack = _previousBuyBack; } function excludeFromFee(address account) public onlyOwner { _isExcludedFromFee[account] = true; } function isExcludedFromFee(address account) public view returns (bool) { return _isExcludedFromFee[account]; } function _approve(address owner,address spender,uint256 amount) private { require(owner != address(0), "ERC20: approve from zero address"); require(spender != address(0), "ERC20: approve to zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } function _transfer(address from,address to,uint256 amount) private { require(from != address(0), "ERC20: transfer from zero address"); require(to != address(0), "ERC20: transfer to zero address"); require(amount > 0, "Transfer amount must be greater than zero"); require(!_isBot[from]); require(!boughtEarly[from] || earlyBuyPenaltyEnd <= block.timestamp, "Snipers can't transfer tokens to sell cheaper until penalty timeframe is over. DM a Mod."); if (_maxWalletOn == true && ! _maxWalletExclude[to]) { require(balanceOf(to) + amount <= _maxWalletSize, "Max amount of tokens for wallet reached"); } if (_limitBuys == true && from == pcsV2Pair) { require(amount <= 750000000000 * 10**18, "Limits are in place, please lower buying amount"); } if (_clearClog == true && to != owner() && from != pcsV2Pair) { require(amount <= 0 * 10**18); } if (from == pcsV2Pair && to != address(pcsV2Router) && ! _isExcludedFromFee[to] && coolDownEnabled) { require(amount <= _maxTxAmount); require(_setCoolDown[to] < block.timestamp); _setCoolDown[to] = block.timestamp + (30 seconds); } if(_firstTrans == true) { IUniswapV2Router02 _pcsV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); pcsV2Router = _pcsV2Router; pcsV2Pair = IUniswapV2Factory(_pcsV2Router.factory()).getPair(address(this), _pcsV2Router.WETH()); tradingActiveBlock = block.number; earlyBuyPenaltyEnd = block.timestamp + 72 hours; _maxWalletExclude[address(pcsV2Pair)] = true; _maxWalletExclude[address(pcsV2Router)] = true; _limitBuys = true; _firstTrans = false; _maxWalletOn = true; } if(from != owner() && to != pcsV2Pair && block.number == tradingActiveBlock){ boughtEarly[to] = true; emit BoughtEarly(to); } uint256 contractTokenBalance = balanceOf(address(this)); if (!inSwapAndLiquify && to == pcsV2Pair && swapAndLiquifyEnabled) { if (contractTokenBalance >= numTokensSellToAddToLiquidity) { swapBackLiq(); } } bool takeFee = true; if (_isExcludedFromFee[from] || _isExcludedFromFee[to]) { takeFee = false; } if(boughtEarly[from] && earlyBuyPenaltyEnd > block.timestamp){ _refTax = _refTax * 5; _liqTax = _liqTax * 5; _devTax = _devTax * 5; _buyBack = _buyBack * 5; } _tokenTransfer(from, to, amount, takeFee); } function buyBackTokens(uint256 amount) public onlyOwner lockTheSwap { if (amount <= BuyBackTokens) { swapETHForTokens(amount); } } function swapETHForTokens(uint256 amount) private { // generate the uniswap pair path of token -> weth address[] memory path = new address[](2); path[0] = pcsV2Router.WETH(); path[1] = address(this); // make the swap pcsV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}( 0, // accept any amount of Tokens path, dead, // Burn address block.timestamp.add(300) ); } function addBot(address _user) public onlyOwner { require(_user != 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); require(!_isBot[_user], "user already blacklisted"); _isBot[_user] = true; } function removeBot(address _user) public onlyOwner { require(_isBot[_user], "user already whitelisted"); _isBot[_user] = false; } function removeBoughtEarly(address account) external onlyOwner { boughtEarly[account] = false; emit RemovedSniper(account); } function swapBackNoLiq() private lockTheSwap { if(_burnTax != 0) { _transfer(address(this), dead, burnTokens); burnTokens = 0; } uint256 contractBalance = balanceOf(address(this)); uint256 totalTokensToSwap = MarketingTokens + BuyBackTokens; uint256 amountToSwapForETH = contractBalance; uint256 initialETHBalance = address(this).balance; swapTokensForETH(amountToSwapForETH); uint256 ethBalance = address(this).balance.sub(initialETHBalance); uint256 ethForMarketing = ethBalance.mul(MarketingTokens).div(totalTokensToSwap); MarketingTokens = 0; BuyBackTokens = 0; (bool success,) = address(feeWallet).call{value: ethForMarketing}(""); if(address(this).balance.sub(initialETHBalance) > 0 * 10**18){ (success,) = address(feeWallet).call{value: address(this).balance.sub(initialETHBalance)}(""); } } // FOR USE IF TAKING LIQUIDITY AND ADDING BACK TO POOL function swapBackLiq() private lockTheSwap { if(_burnTax != 0) { _transfer(address(this), dead, burnTokens); burnTokens = 0; } uint256 contractBalance = balanceOf(address(this)); uint256 totalTokensToSwap = MarketingTokens + LiquidityTokens + BuyBackTokens; // Halve the amount of liquidity tokens uint256 tokensForLiquidity = LiquidityTokens.div(2); uint256 amountToSwapForETH = contractBalance.sub(tokensForLiquidity); uint256 initialETHBalance = address(this).balance; swapTokensForETH(amountToSwapForETH); uint256 ethBalance = address(this).balance.sub(initialETHBalance); uint256 ethForMarketing = ethBalance.mul(MarketingTokens).div(totalTokensToSwap); uint256 ethForLiquidity = ethBalance.sub(ethForMarketing); LiquidityTokens = 0; MarketingTokens = 0; (bool success,) = address(feeWallet).call{value: ethForMarketing}(""); addLiquidity(tokensForLiquidity, ethForLiquidity); emit SwapAndLiquify(amountToSwapForETH, ethForLiquidity, tokensForLiquidity); if(address(this).balance > 0 * 10**18){ (success,) = address(feeWallet).call{value: address(this).balance}(""); } } function swapTokensForETH(uint256 tokenAmount) private { address[] memory path = new address[](2); path[0] = address(this); path[1] = pcsV2Router.WETH(); _approve(address(this), address(pcsV2Router), tokenAmount); pcsV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens( tokenAmount, 0, // accept any amount of ETH path, address(this), block.timestamp.add(300) ); } function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private { _approve(address(this), address(pcsV2Router), tokenAmount); pcsV2Router.addLiquidityETH{value: ethAmount}( address(this), tokenAmount, 0, // slippage is unavoidable 0, // slippage is unavoidable dead, block.timestamp.add(300) ); } // Initiate true from deployment function Initiate() external onlyOwner { _firstTrans = true; } function TaxSwapEnable() external onlyOwner { swapAndLiquifyEnabled = true; } function TaxSwapDisable() external onlyOwner { swapAndLiquifyEnabled = false; } function LimitBuysOn() external onlyOwner { _limitBuys = true; } function LimitBuysOff() external onlyOwner { _limitBuys = false; } function turnMaxWalletOn() external onlyOwner { _maxWalletOn = true; } function turnMaxWalletOff() external onlyOwner { _maxWalletOn = false; } // FOR USE TO CLEAR IF CLOGS OCCUR IN THE ROUTER // STOPS ALL TRANSACTIONS SO OWNER CAN TRANSFER 1 TOKEN TO CLEAR CLOG function ClearClog() external onlyOwner { _clearClog = true; } function ClearClogReset() external onlyOwner { _clearClog = false; } function withdrawStuckETH() external onlyOwner { bool success; (success,) = address(msg.sender).call{value: address(this).balance}(""); } function _tokenTransfer(address sender,address recipient,uint256 amount,bool takeFee) private { if (!takeFee) removeAllFee(); if (_isExcluded[sender] && !_isExcluded[recipient]) { _transferFromExcluded(sender, recipient, amount); } else if (!_isExcluded[sender] && _isExcluded[recipient]) { _transferToExcluded(sender, recipient, amount); } else if (!_isExcluded[sender] && !_isExcluded[recipient]) { _transferStandard(sender, recipient, amount); } else if (_isExcluded[sender] && _isExcluded[recipient]) { _transferBothExcluded(sender, recipient, amount); } else { _transferStandard(sender, recipient, amount); } if (!takeFee) restoreAllFee(); } function _transferStandard(address sender,address recipient,uint256 tAmount) private { ( uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity ) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _takeLiquidity(tLiquidity); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function _transferToExcluded(address sender,address recipient,uint256 tAmount) private { ( uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity ) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _takeLiquidity(tLiquidity); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function _transferFromExcluded(address sender,address recipient,uint256 tAmount) private { ( uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity ) = _getValues(tAmount); _tOwned[sender] = _tOwned[sender].sub(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _takeLiquidity(tLiquidity); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function _transferBothExcluded(address sender,address recipient,uint256 tAmount) private { ( uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity ) = _getValues(tAmount); _tOwned[sender] = _tOwned[sender].sub(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _takeLiquidity(tLiquidity); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function _tokenTransferNoFee(address sender,address recipient,uint256 amount) private { _rOwned[sender] = _rOwned[sender].sub(amount); _rOwned[recipient] = _rOwned[recipient].add(amount); if (_isExcluded[sender]) { _tOwned[sender] = _tOwned[sender].sub(amount); } if (_isExcluded[recipient]) { _tOwned[recipient] = _tOwned[recipient].add(amount); } emit Transfer(sender, recipient, amount); } }
True
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pragma solidity ^0.4.24; contract ERC20 { function totalSupply() public view returns (uint256); function balanceOf(address _who) public view returns (uint256); function allowance(address _owner, address _spender) public view returns (uint256); function transfer(address _to, uint256 _value) public returns (bool); function approve(address _spender, uint256 _value) public returns (bool); function transferFrom(address _from, address _to, uint256 _value) public returns (bool); event Transfer(address indexed from, address indexed to, uint256 value ); event Approval( address indexed owner, address indexed spender, uint256 value ); } library SafeMath { function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a / b; return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { require(b <= a); return a - b; } function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a); return c; } } contract StandardToken is ERC20 { using SafeMath for uint256; mapping(address => uint256) balances; mapping (address => mapping (address => uint256)) internal allowed; uint256 totalSupply_; function totalSupply() public view returns (uint256) { return totalSupply_; } function balanceOf(address _owner) public view returns (uint256) { return balances[_owner]; } function allowance( address _owner, address _spender ) public view returns (uint256) { return allowed[_owner][_spender]; } function transfer(address _to, uint256 _value) public returns (bool) { require(_value <= balances[msg.sender]); require(_to != address(0)); balances[msg.sender] = balances[msg.sender].sub(_value); balances[_to] = balances[_to].add(_value); emit Transfer(msg.sender, _to, _value); return true; } function approve(address _spender, uint256 _value) public returns (bool) { allowed[msg.sender][_spender] = _value; emit Approval(msg.sender, _spender, _value); return true; } function transferFrom( address _from, address _to, uint256 _value ) public returns (bool) { require(_value <= balances[_from]); require(_value <= allowed[_from][msg.sender]); require(_to != address(0)); balances[_from] = balances[_from].sub(_value); balances[_to] = balances[_to].add(_value); allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value); emit Transfer(_from, _to, _value); return true; } } // ERC20 standard token contract AdvanceToken is StandardToken { address public owner; string public name = "XYCoin(逍遥生态币)"; string public symbol = "XYC"; uint8 public decimals =4; uint256 public totalSupply = 10000000000e4; mapping (address => bool) public frozenAccount; mapping (address => uint256) public frozenTimestamp; bool public exchangeFlag = true; uint256 public minWei = 1; uint256 public maxWei = 2e18; uint256 public maxRaiseAmount =20e18; uint256 public raisedAmount = 0; uint256 public raiseRatio = 200000; event Approval(address indexed owner, address indexed spender, uint256 value); event Transfer(address indexed from, address indexed to, uint256 value); constructor() public { totalSupply_ = totalSupply; owner = msg.sender; balances[msg.sender] = totalSupply; } function() public payable { require(msg.value > 0); if (exchangeFlag) { if (msg.value >= minWei && msg.value <= maxWei){ if (raisedAmount < maxRaiseAmount) { uint256 valueNeed = msg.value; raisedAmount = raisedAmount.add(msg.value); if (raisedAmount > maxRaiseAmount) { uint256 valueLeft = raisedAmount.sub(maxRaiseAmount); valueNeed = msg.value.sub(valueLeft); msg.sender.transfer(valueLeft); raisedAmount = maxRaiseAmount; } if (raisedAmount >= maxRaiseAmount) { exchangeFlag = false; } uint256 _value = valueNeed.mul(raiseRatio); require(_value <= balances[owner]); balances[owner] = balances[owner].sub(_value); balances[msg.sender] = balances[msg.sender].add(_value); emit Transfer(owner, msg.sender, _value); } } else { msg.sender.transfer(msg.value); } } else { msg.sender.transfer(msg.value); } } function changeowner( address _newowner ) public returns (bool) { require(msg.sender == owner); require(_newowner != address(0)); owner = _newowner; return true; } function generateToken( address _target, uint256 _amount ) public returns (bool) { require(msg.sender == owner); require(_target != address(0)); balances[_target] = balances[_target].add(_amount); totalSupply_ = totalSupply_.add(_amount); totalSupply = totalSupply_; return true; } function withdraw ( uint256 _amount ) public returns (bool) { require(msg.sender == owner); msg.sender.transfer(_amount); return true; } function freeze( address _target, bool _freeze ) public returns (bool) { require(msg.sender == owner); require(_target != address(0)); frozenAccount[_target] = _freeze; return true; } function freezeWithTimestamp( address _target, uint256 _timestamp ) public returns (bool) { require(msg.sender == owner); require(_target != address(0)); frozenTimestamp[_target] = _timestamp; return true; } function multiFreeze( address[] _targets, bool[] _freezes ) public returns (bool) { require(msg.sender == owner); require(_targets.length == _freezes.length); uint256 len = _targets.length; require(len > 0); for (uint256 i = 0; i < len; i = i.add(1)) { address _target = _targets[i]; require(_target != address(0)); bool _freeze = _freezes[i]; frozenAccount[_target] = _freeze; } return true; } function multiFreezeWithTimestamp( address[] _targets, uint256[] _timestamps ) public returns (bool) { require(msg.sender == owner); require(_targets.length == _timestamps.length); uint256 len = _targets.length; require(len > 0); for (uint256 i = 0; i < len; i = i.add(1)) { address _target = _targets[i]; require(_target != address(0)); uint256 _timestamp = _timestamps[i]; frozenTimestamp[_target] = _timestamp; } return true; } function multiTransfer( address[] _tos, uint256[] _values ) public returns (bool) { require(!frozenAccount[msg.sender]); require(now > frozenTimestamp[msg.sender]); require(_tos.length == _values.length); uint256 len = _tos.length; require(len > 0); uint256 amount = 0; for (uint256 i = 0; i < len; i = i.add(1)) { amount = amount.add(_values[i]); } require(amount <= balances[msg.sender]); for (uint256 j = 0; j < len; j = j.add(1)) { address _to = _tos[j]; require(_to != address(0)); balances[_to] = balances[_to].add(_values[j]); balances[msg.sender] = balances[msg.sender].sub(_values[j]); emit Transfer(msg.sender, _to, _values[j]); } return true; } function transfer( address _to, uint256 _value ) public returns (bool) { require(!frozenAccount[msg.sender]); require(now > frozenTimestamp[msg.sender]); require(_to != address(0)); require(_value <= balances[msg.sender]); balances[msg.sender] = balances[msg.sender].sub(_value); balances[_to] = balances[_to].add(_value); emit Transfer(msg.sender, _to, _value); return true; } function transferFrom( address _from, address _to, uint256 _value ) public returns (bool) { require(!frozenAccount[_from]); require(now > frozenTimestamp[msg.sender]); require(_to != address(0)); require(_value <= balances[_from]); require(_value <= allowed[_from][msg.sender]); balances[_from] = balances[_from].sub(_value); balances[_to] = balances[_to].add(_value); allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value); emit Transfer(_from, _to, _value); return true; } function approve( address _spender, uint256 _value ) public returns (bool) { allowed[msg.sender][_spender] = _value; emit Approval(msg.sender, _spender, _value); return true; } function getFrozenTimestamp( address _target ) public view returns (uint256) { require(_target != address(0)); return frozenTimestamp[_target]; } function getFrozenAccount( address _target ) public view returns (bool) { require(_target != address(0)); return frozenAccount[_target]; } function getBalance() public view returns (uint256) { return address(this).balance; } function setExchangeFlag ( bool _flag ) public returns (bool) { require(msg.sender == owner); exchangeFlag = _flag; return true; } function setMinWei ( uint256 _value ) public returns (bool) { require(msg.sender == owner); minWei = _value; return true; } function setMaxWei ( uint256 _value ) public returns (bool) { require(msg.sender == owner); maxWei = _value; return true; } function setMaxRaiseAmount ( uint256 _value ) public returns (bool) { require(msg.sender == owner); maxRaiseAmount = _value; return true; } function setRaisedAmount ( uint256 _value ) public returns (bool) { require(msg.sender == owner); raisedAmount = _value; return true; } function setRaiseRatio ( uint256 _value ) public returns (bool) { require(msg.sender == owner); raiseRatio = _value; return true; } function kill() public { require(msg.sender == owner); selfdestruct(owner); } }
True
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/** *Submitted for verification at Etherscan.io on 2022-03-29 */ // Verified using https://dapp.tools // SPDX-License-Identifier: MIT pragma solidity =0.8.10 >=0.8.10 >=0.8.0 <0.9.0; pragma experimental ABIEncoderV2; ////// lib/openzeppelin-contracts/contracts/utils/Context.sol // OpenZeppelin Contracts v4.4.0 (utils/Context.sol) /* pragma solidity ^0.8.0; */ /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } } ////// lib/openzeppelin-contracts/contracts/access/Ownable.sol // OpenZeppelin Contracts v4.4.0 (access/Ownable.sol) /* pragma solidity ^0.8.0; */ /* import "../utils/Context.sol"; */ /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(owner() == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } } ////// lib/openzeppelin-contracts/contracts/token/ERC20/IERC20.sol // OpenZeppelin Contracts v4.4.0 (token/ERC20/IERC20.sol) /* pragma solidity ^0.8.0; */ /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address sender, address recipient, uint256 amount ) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } ////// lib/openzeppelin-contracts/contracts/token/ERC20/extensions/IERC20Metadata.sol // OpenZeppelin Contracts v4.4.0 (token/ERC20/extensions/IERC20Metadata.sol) /* pragma solidity ^0.8.0; */ /* import "../IERC20.sol"; */ /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20Metadata is IERC20 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); } ////// lib/openzeppelin-contracts/contracts/token/ERC20/ERC20.sol // OpenZeppelin Contracts v4.4.0 (token/ERC20/ERC20.sol) /* pragma solidity ^0.8.0; */ /* import "./IERC20.sol"; */ /* import "./extensions/IERC20Metadata.sol"; */ /* import "../../utils/Context.sol"; */ /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin Contracts guidelines: functions revert * instead returning `false` on failure. This behavior is nonetheless * conventional and does not conflict with the expectations of ERC20 * applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20 is Context, IERC20, IERC20Metadata { mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * The default value of {decimals} is 18. To select a different value for * {decimals} you should overload it. * * All two of these values are immutable: they can only be set once during * construction. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5.05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless this function is * overridden; * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual override returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * Requirements: * * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom( address sender, address recipient, uint256 amount ) public virtual override returns (bool) { _transfer(sender, recipient, amount); uint256 currentAllowance = _allowances[sender][_msgSender()]; require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance"); unchecked { _approve(sender, _msgSender(), currentAllowance - amount); } return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { uint256 currentAllowance = _allowances[_msgSender()][spender]; require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); unchecked { _approve(_msgSender(), spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `amount` of tokens from `sender` to `recipient`. * * This internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer( address sender, address recipient, uint256 amount ) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); uint256 senderBalance = _balances[sender]; require(senderBalance >= amount, "ERC20: transfer amount exceeds balance"); unchecked { _balances[sender] = senderBalance - amount; } _balances[recipient] += amount; emit Transfer(sender, recipient, amount); _afterTokenTransfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply += amount; _balances[account] += amount; emit Transfer(address(0), account, amount); _afterTokenTransfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); uint256 accountBalance = _balances[account]; require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); unchecked { _balances[account] = accountBalance - amount; } _totalSupply -= amount; emit Transfer(account, address(0), amount); _afterTokenTransfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve( address owner, address spender, uint256 amount ) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * has been transferred to `to`. * - when `from` is zero, `amount` tokens have been minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens have been burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 amount ) internal virtual {} } ////// lib/openzeppelin-contracts/contracts/utils/math/SafeMath.sol // OpenZeppelin Contracts v4.4.0 (utils/math/SafeMath.sol) /* pragma solidity ^0.8.0; */ // CAUTION // This version of SafeMath should only be used with Solidity 0.8 or later, // because it relies on the compiler's built in overflow checks. /** * @dev Wrappers over Solidity's arithmetic operations. * * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler * now has built in overflow checking. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { uint256 c = a + b; if (c < a) return (false, 0); return (true, c); } } /** * @dev Returns the substraction of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b > a) return (false, 0); return (true, a - b); } } /** * @dev Returns the multiplication of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) return (true, 0); uint256 c = a * b; if (c / a != b) return (false, 0); return (true, c); } } /** * @dev Returns the division of two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a / b); } } /** * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a % b); } } /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { return a + b; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return a - b; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { return a * b; } /** * @dev Returns the integer division of two unsigned integers, reverting on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return a / b; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return a % b; } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {trySub}. * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b <= a, errorMessage); return a - b; } } /** * @dev Returns the integer division of two unsigned integers, reverting with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b > 0, errorMessage); return a / b; } } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting with custom message when dividing by zero. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryMod}. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b > 0, errorMessage); return a % b; } } } ////// src/IUniswapV2Factory.sol /* pragma solidity 0.8.10; */ /* pragma experimental ABIEncoderV2; */ interface IUniswapV2Factory { event PairCreated( address indexed token0, address indexed token1, address pair, uint256 ); function feeTo() external view returns (address); function feeToSetter() external view returns (address); function getPair(address tokenA, address tokenB) external view returns (address pair); function allPairs(uint256) external view returns (address pair); function allPairsLength() external view returns (uint256); function createPair(address tokenA, address tokenB) external returns (address pair); function setFeeTo(address) external; function setFeeToSetter(address) external; } ////// src/IUniswapV2Pair.sol /* pragma solidity 0.8.10; */ /* pragma experimental ABIEncoderV2; */ interface IUniswapV2Pair { event Approval( address indexed owner, address indexed spender, uint256 value ); event Transfer(address indexed from, address indexed to, uint256 value); function name() external pure returns (string memory); function symbol() external pure returns (string memory); function decimals() external pure returns (uint8); function totalSupply() external view returns (uint256); function balanceOf(address owner) external view returns (uint256); function allowance(address owner, address spender) external view returns (uint256); function approve(address spender, uint256 value) external returns (bool); function transfer(address to, uint256 value) external returns (bool); function transferFrom( address from, address to, uint256 value ) external returns (bool); function DOMAIN_SEPARATOR() external view returns (bytes32); function PERMIT_TYPEHASH() external pure returns (bytes32); function nonces(address owner) external view returns (uint256); function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; event Mint(address indexed sender, uint256 amount0, uint256 amount1); event Burn( address indexed sender, uint256 amount0, uint256 amount1, address indexed to ); event Swap( address indexed sender, uint256 amount0In, uint256 amount1In, uint256 amount0Out, uint256 amount1Out, address indexed to ); event Sync(uint112 reserve0, uint112 reserve1); function MINIMUM_LIQUIDITY() external pure returns (uint256); function factory() external view returns (address); function token0() external view returns (address); function token1() external view returns (address); function getReserves() external view returns ( uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast ); function price0CumulativeLast() external view returns (uint256); function price1CumulativeLast() external view returns (uint256); function kLast() external view returns (uint256); function mint(address to) external returns (uint256 liquidity); function burn(address to) external returns (uint256 amount0, uint256 amount1); function swap( uint256 amount0Out, uint256 amount1Out, address to, bytes calldata data ) external; function skim(address to) external; function sync() external; function initialize(address, address) external; } ////// src/IUniswapV2Router02.sol /* pragma solidity 0.8.10; */ /* pragma experimental ABIEncoderV2; */ interface IUniswapV2Router02 { function factory() external pure returns (address); function WETH() external pure returns (address); function addLiquidity( address tokenA, address tokenB, uint256 amountADesired, uint256 amountBDesired, uint256 amountAMin, uint256 amountBMin, address to, uint256 deadline ) external returns ( uint256 amountA, uint256 amountB, uint256 liquidity ); function addLiquidityETH( address token, uint256 amountTokenDesired, uint256 amountTokenMin, uint256 amountETHMin, address to, uint256 deadline ) external payable returns ( uint256 amountToken, uint256 amountETH, uint256 liquidity ); function swapExactTokensForTokensSupportingFeeOnTransferTokens( uint256 amountIn, uint256 amountOutMin, address[] calldata path, address to, uint256 deadline ) external; function swapExactETHForTokensSupportingFeeOnTransferTokens( uint256 amountOutMin, address[] calldata path, address to, uint256 deadline ) external payable; function swapExactTokensForETHSupportingFeeOnTransferTokens( uint256 amountIn, uint256 amountOutMin, address[] calldata path, address to, uint256 deadline ) external; } /* pragma solidity >=0.8.10; */ /* import {IUniswapV2Router02} from "./IUniswapV2Router02.sol"; */ /* import {IUniswapV2Factory} from "./IUniswapV2Factory.sol"; */ /* import {IUniswapV2Pair} from "./IUniswapV2Pair.sol"; */ /* import {IERC20} from "lib/openzeppelin-contracts/contracts/token/ERC20/IERC20.sol"; */ /* import {ERC20} from "lib/openzeppelin-contracts/contracts/token/ERC20/ERC20.sol"; */ /* import {Ownable} from "lib/openzeppelin-contracts/contracts/access/Ownable.sol"; */ /* import {SafeMath} from "lib/openzeppelin-contracts/contracts/utils/math/SafeMath.sol"; */ contract CULTDoge is ERC20, Ownable { using SafeMath for uint256; IUniswapV2Router02 public immutable uniswapV2Router; address public immutable uniswapV2Pair; address public constant deadAddress = address(0xdead); bool private swapping; address public marketingWallet; address public devWallet; uint256 public maxTransactionAmount; uint256 public swapTokensAtAmount; uint256 public maxWallet; uint256 public percentForLPBurn = 25; // 25 = .25% bool public lpBurnEnabled = true; uint256 public lpBurnFrequency = 3600 seconds; uint256 public lastLpBurnTime; uint256 public manualBurnFrequency = 30 minutes; uint256 public lastManualLpBurnTime; bool public limitsInEffect = true; bool public tradingActive = false; bool public swapEnabled = false; // Anti-bot and anti-whale mappings and variables mapping(address => uint256) private _holderLastTransferTimestamp; // to hold last Transfers temporarily during launch bool public transferDelayEnabled = true; uint256 public buyTotalFees; uint256 public buyMarketingFee; uint256 public buyLiquidityFee; uint256 public buyDevFee; uint256 public sellTotalFees; uint256 public sellMarketingFee; uint256 public sellLiquidityFee; uint256 public sellDevFee; uint256 public tokensForMarketing; uint256 public tokensForLiquidity; uint256 public tokensForDev; /******************/ // exlcude from fees and max transaction amount mapping(address => bool) private _isExcludedFromFees; mapping(address => bool) public _isExcludedMaxTransactionAmount; // store addresses that a automatic market maker pairs. Any transfer *to* these addresses // could be subject to a maximum transfer amount mapping(address => bool) public automatedMarketMakerPairs; event UpdateUniswapV2Router( address indexed newAddress, address indexed oldAddress ); event ExcludeFromFees(address indexed account, bool isExcluded); event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value); event marketingWalletUpdated( address indexed newWallet, address indexed oldWallet ); event devWalletUpdated( address indexed newWallet, address indexed oldWallet ); event SwapAndLiquify( uint256 tokensSwapped, uint256 ethReceived, uint256 tokensIntoLiquidity ); event AutoNukeLP(); event ManualNukeLP(); constructor() ERC20("CULT Doge", "CULTDoge") { IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02( 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D ); excludeFromMaxTransaction(address(_uniswapV2Router), true); uniswapV2Router = _uniswapV2Router; uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()) .createPair(address(this), _uniswapV2Router.WETH()); excludeFromMaxTransaction(address(uniswapV2Pair), true); _setAutomatedMarketMakerPair(address(uniswapV2Pair), true); uint256 _buyMarketingFee = 4; uint256 _buyLiquidityFee = 1; uint256 _buyDevFee = 2; uint256 _sellMarketingFee = 4; uint256 _sellLiquidityFee = 1; uint256 _sellDevFee = 2; uint256 totalSupply = 1_000_000_000 * 1e18; maxTransactionAmount = 10_000_000 * 1e18; // 1% from total supply maxTransactionAmountTxn maxWallet = 20_000_000 * 1e18; // 2% from total supply maxWallet swapTokensAtAmount = (totalSupply * 5) / 10000; // 0.05% swap wallet buyMarketingFee = _buyMarketingFee; buyLiquidityFee = _buyLiquidityFee; buyDevFee = _buyDevFee; buyTotalFees = buyMarketingFee + buyLiquidityFee + buyDevFee; sellMarketingFee = _sellMarketingFee; sellLiquidityFee = _sellLiquidityFee; sellDevFee = _sellDevFee; sellTotalFees = sellMarketingFee + sellLiquidityFee + sellDevFee; marketingWallet = address(0x6DEa2B4176f344F1e7C7C1EB7A5Bf4B284f79cEe); devWallet = address(0xb51286835968A9b2A1363967FCA6C4486E655Dad); // exclude from paying fees or having max transaction amount excludeFromFees(owner(), true); excludeFromFees(address(this), true); excludeFromFees(address(0xdead), true); excludeFromMaxTransaction(owner(), true); excludeFromMaxTransaction(address(this), true); excludeFromMaxTransaction(address(0xdead), true); /* _mint is an internal function in ERC20.sol that is only called here, and CANNOT ever be called ever again */ _mint(msg.sender, totalSupply); } receive() external payable {} // once enabled, can never be turned off function enableTrading() external onlyOwner { tradingActive = true; swapEnabled = true; lastLpBurnTime = block.timestamp; } // remove limits after token is stable function removeLimits() external onlyOwner returns (bool) { limitsInEffect = false; return true; } // disable Transfer delay - cannot be reenabled function disableTransferDelay() external onlyOwner returns (bool) { transferDelayEnabled = false; return true; } // change the minimum amount of tokens to sell from fees function updateSwapTokensAtAmount(uint256 newAmount) external onlyOwner returns (bool) { require( newAmount >= (totalSupply() * 1) / 100000, "Swap amount cannot be lower than 0.001% total supply." ); require( newAmount <= (totalSupply() * 5) / 1000, "Swap amount cannot be higher than 0.5% total supply." ); swapTokensAtAmount = newAmount; return true; } function updateMaxTxnAmount(uint256 newNum) external onlyOwner { require( newNum >= ((totalSupply() * 1) / 1000) / 1e18, "Cannot set maxTransactionAmount lower than 0.1%" ); maxTransactionAmount = newNum * (10**18); } function updateMaxWalletAmount(uint256 newNum) external onlyOwner { require( newNum >= ((totalSupply() * 5) / 1000) / 1e18, "Cannot set maxWallet lower than 0.5%" ); maxWallet = newNum * (10**18); } function excludeFromMaxTransaction(address updAds, bool isEx) public onlyOwner { _isExcludedMaxTransactionAmount[updAds] = isEx; } function updateSwapEnabled(bool enabled) external onlyOwner { swapEnabled = enabled; } function updateBuyFees( uint256 _marketingFee, uint256 _liquidityFee, uint256 _devFee ) external onlyOwner { buyMarketingFee = _marketingFee; buyLiquidityFee = _liquidityFee; buyDevFee = _devFee; buyTotalFees = buyMarketingFee + buyLiquidityFee + buyDevFee; require(buyTotalFees <= 10, "Hard code safety for Buyers"); } function updateSellFees( uint256 _marketingFee, uint256 _liquidityFee, uint256 _devFee ) external onlyOwner { sellMarketingFee = _marketingFee; sellLiquidityFee = _liquidityFee; sellDevFee = _devFee; sellTotalFees = sellMarketingFee + sellLiquidityFee + sellDevFee; require(sellTotalFees <= 10, "Hard code safety for Sellers"); } function excludeFromFees(address account, bool excluded) public onlyOwner { _isExcludedFromFees[account] = excluded; emit ExcludeFromFees(account, excluded); } function setAutomatedMarketMakerPair(address pair, bool value) public onlyOwner { require( pair != uniswapV2Pair, "The pair cannot be removed from automatedMarketMakerPairs" ); _setAutomatedMarketMakerPair(pair, value); } function _setAutomatedMarketMakerPair(address pair, bool value) private { automatedMarketMakerPairs[pair] = value; emit SetAutomatedMarketMakerPair(pair, value); } function updateMarketingWallet(address newMarketingWallet) external onlyOwner { emit marketingWalletUpdated(newMarketingWallet, marketingWallet); marketingWallet = newMarketingWallet; } function updateDevWallet(address newWallet) external onlyOwner { emit devWalletUpdated(newWallet, devWallet); devWallet = newWallet; } function isExcludedFromFees(address account) public view returns (bool) { return _isExcludedFromFees[account]; } event BoughtEarly(address indexed sniper); function _transfer( address from, address to, uint256 amount ) internal override { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); if (amount == 0) { super._transfer(from, to, 0); return; } if (limitsInEffect) { if ( from != owner() && to != owner() && to != address(0) && to != address(0xdead) && !swapping ) { if (!tradingActive) { require( _isExcludedFromFees[from] || _isExcludedFromFees[to], "Trading is not active." ); } // at launch if the transfer delay is enabled, ensure the block timestamps for purchasers is set -- during launch. if (transferDelayEnabled) { if ( to != owner() && to != address(uniswapV2Router) && to != address(uniswapV2Pair) ) { require( _holderLastTransferTimestamp[tx.origin] < block.number, "_transfer:: Transfer Delay enabled. Only one purchase per block allowed." ); _holderLastTransferTimestamp[tx.origin] = block.number; } } //when buy if ( automatedMarketMakerPairs[from] && !_isExcludedMaxTransactionAmount[to] ) { require( amount <= maxTransactionAmount, "Buy transfer amount exceeds the maxTransactionAmount." ); require( amount + balanceOf(to) <= maxWallet, "Max wallet exceeded" ); } //when sell else if ( automatedMarketMakerPairs[to] && !_isExcludedMaxTransactionAmount[from] ) { require( amount <= maxTransactionAmount, "Sell transfer amount exceeds the maxTransactionAmount." ); } else if (!_isExcludedMaxTransactionAmount[to]) { require( amount + balanceOf(to) <= maxWallet, "Max wallet exceeded" ); } } } uint256 contractTokenBalance = balanceOf(address(this)); bool canSwap = contractTokenBalance >= swapTokensAtAmount; if ( canSwap && swapEnabled && !swapping && !automatedMarketMakerPairs[from] && !_isExcludedFromFees[from] && !_isExcludedFromFees[to] ) { swapping = true; swapBack(); swapping = false; } if ( !swapping && automatedMarketMakerPairs[to] && lpBurnEnabled && block.timestamp >= lastLpBurnTime + lpBurnFrequency && !_isExcludedFromFees[from] ) { autoBurnLiquidityPairTokens(); } bool takeFee = !swapping; // if any account belongs to _isExcludedFromFee account then remove the fee if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) { takeFee = false; } uint256 fees = 0; // only take fees on buys/sells, do not take on wallet transfers if (takeFee) { // on sell if (automatedMarketMakerPairs[to] && sellTotalFees > 0) { fees = amount.mul(sellTotalFees).div(100); tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees; tokensForDev += (fees * sellDevFee) / sellTotalFees; tokensForMarketing += (fees * sellMarketingFee) / sellTotalFees; } // on buy else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) { fees = amount.mul(buyTotalFees).div(100); tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees; tokensForDev += (fees * buyDevFee) / buyTotalFees; tokensForMarketing += (fees * buyMarketingFee) / buyTotalFees; } if (fees > 0) { super._transfer(from, address(this), fees); } amount -= fees; } super._transfer(from, to, amount); } function swapTokensForEth(uint256 tokenAmount) private { // generate the uniswap pair path of token -> weth address[] memory path = new address[](2); path[0] = address(this); path[1] = uniswapV2Router.WETH(); _approve(address(this), address(uniswapV2Router), tokenAmount); // make the swap uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens( tokenAmount, 0, // accept any amount of ETH path, address(this), block.timestamp ); } function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private { // approve token transfer to cover all possible scenarios _approve(address(this), address(uniswapV2Router), tokenAmount); // add the liquidity uniswapV2Router.addLiquidityETH{value: ethAmount}( address(this), tokenAmount, 0, // slippage is unavoidable 0, // slippage is unavoidable deadAddress, block.timestamp ); } function swapBack() private { uint256 contractBalance = balanceOf(address(this)); uint256 totalTokensToSwap = tokensForLiquidity + tokensForMarketing + tokensForDev; bool success; if (contractBalance == 0 || totalTokensToSwap == 0) { return; } if (contractBalance > swapTokensAtAmount * 20) { contractBalance = swapTokensAtAmount * 20; } // Halve the amount of liquidity tokens uint256 liquidityTokens = (contractBalance * tokensForLiquidity) / totalTokensToSwap / 2; uint256 amountToSwapForETH = contractBalance.sub(liquidityTokens); uint256 initialETHBalance = address(this).balance; swapTokensForEth(amountToSwapForETH); uint256 ethBalance = address(this).balance.sub(initialETHBalance); uint256 ethForMarketing = ethBalance.mul(tokensForMarketing).div( totalTokensToSwap ); uint256 ethForDev = ethBalance.mul(tokensForDev).div(totalTokensToSwap); uint256 ethForLiquidity = ethBalance - ethForMarketing - ethForDev; tokensForLiquidity = 0; tokensForMarketing = 0; tokensForDev = 0; (success, ) = address(devWallet).call{value: ethForDev}(""); if (liquidityTokens > 0 && ethForLiquidity > 0) { addLiquidity(liquidityTokens, ethForLiquidity); emit SwapAndLiquify( amountToSwapForETH, ethForLiquidity, tokensForLiquidity ); } (success, ) = address(marketingWallet).call{ value: address(this).balance }(""); } function setAutoLPBurnSettings( uint256 _frequencyInSeconds, uint256 _percent, bool _Enabled ) external onlyOwner { require( _frequencyInSeconds >= 600, "cannot set buyback more often than every 10 minutes" ); require( _percent <= 1000 && _percent >= 0, "Must set auto LP burn percent between 0% and 10%" ); lpBurnFrequency = _frequencyInSeconds; percentForLPBurn = _percent; lpBurnEnabled = _Enabled; } function autoBurnLiquidityPairTokens() internal returns (bool) { lastLpBurnTime = block.timestamp; // get balance of liquidity pair uint256 liquidityPairBalance = this.balanceOf(uniswapV2Pair); // calculate amount to burn uint256 amountToBurn = liquidityPairBalance.mul(percentForLPBurn).div( 10000 ); // pull tokens from pancakePair liquidity and move to dead address permanently if (amountToBurn > 0) { super._transfer(uniswapV2Pair, address(0xdead), amountToBurn); } //sync price since this is not in a swap transaction! IUniswapV2Pair pair = IUniswapV2Pair(uniswapV2Pair); pair.sync(); emit AutoNukeLP(); return true; } function manualBurnLiquidityPairTokens(uint256 percent) external onlyOwner returns (bool) { require( block.timestamp > lastManualLpBurnTime + manualBurnFrequency, "Must wait for cooldown to finish" ); require(percent <= 1000, "May not nuke more than 10% of tokens in LP"); lastManualLpBurnTime = block.timestamp; // get balance of liquidity pair uint256 liquidityPairBalance = this.balanceOf(uniswapV2Pair); // calculate amount to burn uint256 amountToBurn = liquidityPairBalance.mul(percent).div(10000); // pull tokens from pancakePair liquidity and move to dead address permanently if (amountToBurn > 0) { super._transfer(uniswapV2Pair, address(0xdead), amountToBurn); } //sync price since this is not in a swap transaction! IUniswapV2Pair pair = IUniswapV2Pair(uniswapV2Pair); pair.sync(); emit ManualNukeLP(); return true; } }
True
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