ERC-721
Overview
Max Total Supply
5,746 ANON
Holders
648
Market
Volume (24H)
N/A
Min Price (24H)
N/A
Max Price (24H)
N/A
Other Info
Token Contract
Balance
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
Anon
Compiler Version
v0.6.12+commit.27d51765
Contract Source Code (Solidity)
/** *Submitted for verification at Etherscan.io on 2021-06-21 */ // Sources flattened with hardhat v2.3.0 https://hardhat.org // File @openzeppelin/contracts/utils/[email protected] // SPDX-License-Identifier: MIT 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 @openzeppelin/contracts/access/[email protected] /** * @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; } } // File @openzeppelin/contracts/introspection/[email protected] /** * @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] /** * @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] /** * @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/[email protected] /** * @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/token/ERC721/[email protected] /** * @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/introspection/[email protected] /** * @dev Implementation of the {IERC165} interface. * * Contracts may inherit from this and call {_registerInterface} to declare * their support of an interface. */ abstract 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 virtual 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; } } // File @openzeppelin/contracts/math/[email protected] /** * @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 @openzeppelin/contracts/utils/[email protected] /** * @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); } } } } // File @openzeppelin/contracts/utils/[email protected] /** * @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)); } } // File @openzeppelin/contracts/utils/[email protected] /** * @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 Tries to returns the value associated with `key`. O(1). * Does not revert if `key` is not in the map. */ function _tryGet(Map storage map, bytes32 key) private view returns (bool, bytes32) { uint256 keyIndex = map._indexes[key]; if (keyIndex == 0) return (false, 0); // Equivalent to contains(map, key) return (true, map._entries[keyIndex - 1]._value); // All indexes are 1-based } /** * @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) { uint256 keyIndex = map._indexes[key]; require(keyIndex != 0, "EnumerableMap: nonexistent key"); // Equivalent to contains(map, key) return map._entries[keyIndex - 1]._value; // All indexes are 1-based } /** * @dev Same as {_get}, with a custom error message when `key` is not in the map. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {_tryGet}. */ 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(uint160(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(uint160(uint256(value)))); } /** * @dev Tries to returns the value associated with `key`. O(1). * Does not revert if `key` is not in the map. * * _Available since v3.4._ */ function tryGet(UintToAddressMap storage map, uint256 key) internal view returns (bool, address) { (bool success, bytes32 value) = _tryGet(map._inner, bytes32(key)); return (success, address(uint160(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(uint160(uint256(_get(map._inner, bytes32(key))))); } /** * @dev Same as {get}, with a custom error message when `key` is not in the map. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryGet}. */ function get(UintToAddressMap storage map, uint256 key, string memory errorMessage) internal view returns (address) { return address(uint160(uint256(_get(map._inner, bytes32(key), errorMessage)))); } } // File @openzeppelin/contracts/utils/[email protected] /** * @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--] = bytes1(uint8(48 + temp % 10)); temp /= 10; } return string(buffer); } } // File @openzeppelin/contracts/token/ERC721/[email protected] /** * @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 virtual 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 virtual override returns (address) { return _tokenOwners.get(tokenId, "ERC721: owner query for nonexistent token"); } /** * @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 _tokenURI = _tokenURIs[tokenId]; string memory base = baseURI(); // If there is no base URI, return the token URI. if (bytes(base).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(base, _tokenURI)); } // If there is a baseURI but no tokenURI, concatenate the tokenID to the baseURI. return string(abi.encodePacked(base, 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 virtual returns (string memory) { return _baseURI; } /** * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}. */ function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) { return _holderTokens[owner].at(index); } /** * @dev See {IERC721Enumerable-totalSupply}. */ function totalSupply() public view virtual 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 virtual 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 = ERC721.ownerOf(tokenId); require(to != owner, "ERC721: approval to current owner"); require(_msgSender() == owner || ERC721.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 _tokenOwners.contains(tokenId); } /** * @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 || ERC721.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 = ERC721.ownerOf(tokenId); // internal owner _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(ERC721.ownerOf(tokenId) == from, "ERC721: transfer of token that is not own"); // internal 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); _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); } /** * @dev Approve `to` to operate on `tokenId` * * Emits an {Approval} event. */ function _approve(address to, uint256 tokenId) internal virtual { _tokenApprovals[tokenId] = to; emit Approval(ERC721.ownerOf(tokenId), to, tokenId); // internal owner } /** * @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 hardhat/[email protected] library console { address constant CONSOLE_ADDRESS = address(0x000000000000000000636F6e736F6c652e6c6f67); function _sendLogPayload(bytes memory payload) private view { uint256 payloadLength = payload.length; address consoleAddress = CONSOLE_ADDRESS; assembly { let payloadStart := add(payload, 32) let r := staticcall(gas(), consoleAddress, payloadStart, payloadLength, 0, 0) } } function log() internal view { _sendLogPayload(abi.encodeWithSignature("log()")); } function logInt(int p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(int)", p0)); } function logUint(uint p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint)", p0)); } function logString(string memory p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(string)", p0)); } function logBool(bool p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool)", p0)); } function logAddress(address p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(address)", p0)); } function logBytes(bytes memory p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bytes)", p0)); } function logBytes1(bytes1 p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bytes1)", p0)); } function logBytes2(bytes2 p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bytes2)", p0)); } function logBytes3(bytes3 p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bytes3)", p0)); } function logBytes4(bytes4 p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bytes4)", p0)); } function logBytes5(bytes5 p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bytes5)", p0)); } function logBytes6(bytes6 p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bytes6)", p0)); } function logBytes7(bytes7 p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bytes7)", p0)); } function logBytes8(bytes8 p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bytes8)", p0)); } function logBytes9(bytes9 p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bytes9)", p0)); } function logBytes10(bytes10 p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bytes10)", p0)); } function logBytes11(bytes11 p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bytes11)", p0)); } function logBytes12(bytes12 p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bytes12)", p0)); } function logBytes13(bytes13 p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bytes13)", p0)); } function logBytes14(bytes14 p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bytes14)", p0)); } function logBytes15(bytes15 p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bytes15)", p0)); } function logBytes16(bytes16 p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bytes16)", p0)); } function logBytes17(bytes17 p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bytes17)", p0)); } function logBytes18(bytes18 p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bytes18)", p0)); } function logBytes19(bytes19 p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bytes19)", p0)); } function logBytes20(bytes20 p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bytes20)", p0)); } function logBytes21(bytes21 p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bytes21)", p0)); } function logBytes22(bytes22 p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bytes22)", p0)); } function logBytes23(bytes23 p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bytes23)", p0)); } function logBytes24(bytes24 p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bytes24)", p0)); } function logBytes25(bytes25 p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bytes25)", p0)); } function logBytes26(bytes26 p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bytes26)", p0)); } function logBytes27(bytes27 p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bytes27)", p0)); } function logBytes28(bytes28 p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bytes28)", p0)); } function logBytes29(bytes29 p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bytes29)", p0)); } function logBytes30(bytes30 p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bytes30)", p0)); } function logBytes31(bytes31 p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bytes31)", p0)); } function logBytes32(bytes32 p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bytes32)", p0)); } function log(uint p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint)", p0)); } function log(string memory p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(string)", p0)); } function log(bool p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool)", p0)); } function log(address p0) internal view { _sendLogPayload(abi.encodeWithSignature("log(address)", p0)); } function log(uint p0, uint p1) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,uint)", p0, p1)); } function log(uint p0, string memory p1) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,string)", p0, p1)); } function log(uint p0, bool p1) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,bool)", p0, p1)); } function log(uint p0, address p1) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,address)", p0, p1)); } function log(string memory p0, uint p1) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,uint)", p0, p1)); } function log(string memory p0, string memory p1) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,string)", p0, p1)); } function log(string memory p0, bool p1) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,bool)", p0, p1)); } function log(string memory p0, address p1) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,address)", p0, p1)); } function log(bool p0, uint p1) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,uint)", p0, p1)); } function log(bool p0, string memory p1) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,string)", p0, p1)); } function log(bool p0, bool p1) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,bool)", p0, p1)); } function log(bool p0, address p1) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,address)", p0, p1)); } function log(address p0, uint p1) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,uint)", p0, p1)); } function log(address p0, string memory p1) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,string)", p0, p1)); } function log(address p0, bool p1) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,bool)", p0, p1)); } function log(address p0, address p1) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,address)", p0, p1)); } function log(uint p0, uint p1, uint p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,uint,uint)", p0, p1, p2)); } function log(uint p0, uint p1, string memory p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,uint,string)", p0, p1, p2)); } function log(uint p0, uint p1, bool p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,uint,bool)", p0, p1, p2)); } function log(uint p0, uint p1, address p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,uint,address)", p0, p1, p2)); } function log(uint p0, string memory p1, uint p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,string,uint)", p0, p1, p2)); } function log(uint p0, string memory p1, string memory p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,string,string)", p0, p1, p2)); } function log(uint p0, string memory p1, bool p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,string,bool)", p0, p1, p2)); } function log(uint p0, string memory p1, address p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,string,address)", p0, p1, p2)); } function log(uint p0, bool p1, uint p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,bool,uint)", p0, p1, p2)); } function log(uint p0, bool p1, string memory p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,bool,string)", p0, p1, p2)); } function log(uint p0, bool p1, bool p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,bool,bool)", p0, p1, p2)); } function log(uint p0, bool p1, address p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,bool,address)", p0, p1, p2)); } function log(uint p0, address p1, uint p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,address,uint)", p0, p1, p2)); } function log(uint p0, address p1, string memory p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,address,string)", p0, p1, p2)); } function log(uint p0, address p1, bool p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,address,bool)", p0, p1, p2)); } function log(uint p0, address p1, address p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,address,address)", p0, p1, p2)); } function log(string memory p0, uint p1, uint p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,uint,uint)", p0, p1, p2)); } function log(string memory p0, uint p1, string memory p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,uint,string)", p0, p1, p2)); } function log(string memory p0, uint p1, bool p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,uint,bool)", p0, p1, p2)); } function log(string memory p0, uint p1, address p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,uint,address)", p0, p1, p2)); } function log(string memory p0, string memory p1, uint p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,string,uint)", p0, p1, p2)); } function log(string memory p0, string memory p1, string memory p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,string,string)", p0, p1, p2)); } function log(string memory p0, string memory p1, bool p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,string,bool)", p0, p1, p2)); } function log(string memory p0, string memory p1, address p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,string,address)", p0, p1, p2)); } function log(string memory p0, bool p1, uint p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,bool,uint)", p0, p1, p2)); } function log(string memory p0, bool p1, string memory p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,bool,string)", p0, p1, p2)); } function log(string memory p0, bool p1, bool p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,bool,bool)", p0, p1, p2)); } function log(string memory p0, bool p1, address p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,bool,address)", p0, p1, p2)); } function log(string memory p0, address p1, uint p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,address,uint)", p0, p1, p2)); } function log(string memory p0, address p1, string memory p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,address,string)", p0, p1, p2)); } function log(string memory p0, address p1, bool p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,address,bool)", p0, p1, p2)); } function log(string memory p0, address p1, address p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,address,address)", p0, p1, p2)); } function log(bool p0, uint p1, uint p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,uint,uint)", p0, p1, p2)); } function log(bool p0, uint p1, string memory p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,uint,string)", p0, p1, p2)); } function log(bool p0, uint p1, bool p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,uint,bool)", p0, p1, p2)); } function log(bool p0, uint p1, address p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,uint,address)", p0, p1, p2)); } function log(bool p0, string memory p1, uint p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,string,uint)", p0, p1, p2)); } function log(bool p0, string memory p1, string memory p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,string,string)", p0, p1, p2)); } function log(bool p0, string memory p1, bool p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,string,bool)", p0, p1, p2)); } function log(bool p0, string memory p1, address p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,string,address)", p0, p1, p2)); } function log(bool p0, bool p1, uint p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,bool,uint)", p0, p1, p2)); } function log(bool p0, bool p1, string memory p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,bool,string)", p0, p1, p2)); } function log(bool p0, bool p1, bool p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,bool,bool)", p0, p1, p2)); } function log(bool p0, bool p1, address p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,bool,address)", p0, p1, p2)); } function log(bool p0, address p1, uint p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,address,uint)", p0, p1, p2)); } function log(bool p0, address p1, string memory p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,address,string)", p0, p1, p2)); } function log(bool p0, address p1, bool p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,address,bool)", p0, p1, p2)); } function log(bool p0, address p1, address p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,address,address)", p0, p1, p2)); } function log(address p0, uint p1, uint p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,uint,uint)", p0, p1, p2)); } function log(address p0, uint p1, string memory p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,uint,string)", p0, p1, p2)); } function log(address p0, uint p1, bool p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,uint,bool)", p0, p1, p2)); } function log(address p0, uint p1, address p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,uint,address)", p0, p1, p2)); } function log(address p0, string memory p1, uint p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,string,uint)", p0, p1, p2)); } function log(address p0, string memory p1, string memory p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,string,string)", p0, p1, p2)); } function log(address p0, string memory p1, bool p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,string,bool)", p0, p1, p2)); } function log(address p0, string memory p1, address p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,string,address)", p0, p1, p2)); } function log(address p0, bool p1, uint p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,bool,uint)", p0, p1, p2)); } function log(address p0, bool p1, string memory p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,bool,string)", p0, p1, p2)); } function log(address p0, bool p1, bool p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,bool,bool)", p0, p1, p2)); } function log(address p0, bool p1, address p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,bool,address)", p0, p1, p2)); } function log(address p0, address p1, uint p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,address,uint)", p0, p1, p2)); } function log(address p0, address p1, string memory p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,address,string)", p0, p1, p2)); } function log(address p0, address p1, bool p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,address,bool)", p0, p1, p2)); } function log(address p0, address p1, address p2) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,address,address)", p0, p1, p2)); } function log(uint p0, uint p1, uint p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,uint,uint,uint)", p0, p1, p2, p3)); } function log(uint p0, uint p1, uint p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,uint,uint,string)", p0, p1, p2, p3)); } function log(uint p0, uint p1, uint p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,uint,uint,bool)", p0, p1, p2, p3)); } function log(uint p0, uint p1, uint p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,uint,uint,address)", p0, p1, p2, p3)); } function log(uint p0, uint p1, string memory p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,uint,string,uint)", p0, p1, p2, p3)); } function log(uint p0, uint p1, string memory p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,uint,string,string)", p0, p1, p2, p3)); } function log(uint p0, uint p1, string memory p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,uint,string,bool)", p0, p1, p2, p3)); } function log(uint p0, uint p1, string memory p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,uint,string,address)", p0, p1, p2, p3)); } function log(uint p0, uint p1, bool p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,uint,bool,uint)", p0, p1, p2, p3)); } function log(uint p0, uint p1, bool p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,uint,bool,string)", p0, p1, p2, p3)); } function log(uint p0, uint p1, bool p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,uint,bool,bool)", p0, p1, p2, p3)); } function log(uint p0, uint p1, bool p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,uint,bool,address)", p0, p1, p2, p3)); } function log(uint p0, uint p1, address p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,uint,address,uint)", p0, p1, p2, p3)); } function log(uint p0, uint p1, address p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,uint,address,string)", p0, p1, p2, p3)); } function log(uint p0, uint p1, address p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,uint,address,bool)", p0, p1, p2, p3)); } function log(uint p0, uint p1, address p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,uint,address,address)", p0, p1, p2, p3)); } function log(uint p0, string memory p1, uint p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,string,uint,uint)", p0, p1, p2, p3)); } function log(uint p0, string memory p1, uint p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,string,uint,string)", p0, p1, p2, p3)); } function log(uint p0, string memory p1, uint p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,string,uint,bool)", p0, p1, p2, p3)); } function log(uint p0, string memory p1, uint p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,string,uint,address)", p0, p1, p2, p3)); } function log(uint p0, string memory p1, string memory p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,string,string,uint)", p0, p1, p2, p3)); } function log(uint p0, string memory p1, string memory p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,string,string,string)", p0, p1, p2, p3)); } function log(uint p0, string memory p1, string memory p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,string,string,bool)", p0, p1, p2, p3)); } function log(uint p0, string memory p1, string memory p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,string,string,address)", p0, p1, p2, p3)); } function log(uint p0, string memory p1, bool p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,string,bool,uint)", p0, p1, p2, p3)); } function log(uint p0, string memory p1, bool p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,string,bool,string)", p0, p1, p2, p3)); } function log(uint p0, string memory p1, bool p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,string,bool,bool)", p0, p1, p2, p3)); } function log(uint p0, string memory p1, bool p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,string,bool,address)", p0, p1, p2, p3)); } function log(uint p0, string memory p1, address p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,string,address,uint)", p0, p1, p2, p3)); } function log(uint p0, string memory p1, address p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,string,address,string)", p0, p1, p2, p3)); } function log(uint p0, string memory p1, address p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,string,address,bool)", p0, p1, p2, p3)); } function log(uint p0, string memory p1, address p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,string,address,address)", p0, p1, p2, p3)); } function log(uint p0, bool p1, uint p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,bool,uint,uint)", p0, p1, p2, p3)); } function log(uint p0, bool p1, uint p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,bool,uint,string)", p0, p1, p2, p3)); } function log(uint p0, bool p1, uint p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,bool,uint,bool)", p0, p1, p2, p3)); } function log(uint p0, bool p1, uint p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,bool,uint,address)", p0, p1, p2, p3)); } function log(uint p0, bool p1, string memory p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,bool,string,uint)", p0, p1, p2, p3)); } function log(uint p0, bool p1, string memory p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,bool,string,string)", p0, p1, p2, p3)); } function log(uint p0, bool p1, string memory p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,bool,string,bool)", p0, p1, p2, p3)); } function log(uint p0, bool p1, string memory p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,bool,string,address)", p0, p1, p2, p3)); } function log(uint p0, bool p1, bool p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,bool,bool,uint)", p0, p1, p2, p3)); } function log(uint p0, bool p1, bool p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,bool,bool,string)", p0, p1, p2, p3)); } function log(uint p0, bool p1, bool p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,bool,bool,bool)", p0, p1, p2, p3)); } function log(uint p0, bool p1, bool p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,bool,bool,address)", p0, p1, p2, p3)); } function log(uint p0, bool p1, address p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,bool,address,uint)", p0, p1, p2, p3)); } function log(uint p0, bool p1, address p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,bool,address,string)", p0, p1, p2, p3)); } function log(uint p0, bool p1, address p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,bool,address,bool)", p0, p1, p2, p3)); } function log(uint p0, bool p1, address p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,bool,address,address)", p0, p1, p2, p3)); } function log(uint p0, address p1, uint p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,address,uint,uint)", p0, p1, p2, p3)); } function log(uint p0, address p1, uint p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,address,uint,string)", p0, p1, p2, p3)); } function log(uint p0, address p1, uint p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,address,uint,bool)", p0, p1, p2, p3)); } function log(uint p0, address p1, uint p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,address,uint,address)", p0, p1, p2, p3)); } function log(uint p0, address p1, string memory p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,address,string,uint)", p0, p1, p2, p3)); } function log(uint p0, address p1, string memory p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,address,string,string)", p0, p1, p2, p3)); } function log(uint p0, address p1, string memory p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,address,string,bool)", p0, p1, p2, p3)); } function log(uint p0, address p1, string memory p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,address,string,address)", p0, p1, p2, p3)); } function log(uint p0, address p1, bool p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,address,bool,uint)", p0, p1, p2, p3)); } function log(uint p0, address p1, bool p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,address,bool,string)", p0, p1, p2, p3)); } function log(uint p0, address p1, bool p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,address,bool,bool)", p0, p1, p2, p3)); } function log(uint p0, address p1, bool p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,address,bool,address)", p0, p1, p2, p3)); } function log(uint p0, address p1, address p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,address,address,uint)", p0, p1, p2, p3)); } function log(uint p0, address p1, address p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,address,address,string)", p0, p1, p2, p3)); } function log(uint p0, address p1, address p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,address,address,bool)", p0, p1, p2, p3)); } function log(uint p0, address p1, address p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(uint,address,address,address)", p0, p1, p2, p3)); } function log(string memory p0, uint p1, uint p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,uint,uint,uint)", p0, p1, p2, p3)); } function log(string memory p0, uint p1, uint p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,uint,uint,string)", p0, p1, p2, p3)); } function log(string memory p0, uint p1, uint p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,uint,uint,bool)", p0, p1, p2, p3)); } function log(string memory p0, uint p1, uint p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,uint,uint,address)", p0, p1, p2, p3)); } function log(string memory p0, uint p1, string memory p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,uint,string,uint)", p0, p1, p2, p3)); } function log(string memory p0, uint p1, string memory p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,uint,string,string)", p0, p1, p2, p3)); } function log(string memory p0, uint p1, string memory p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,uint,string,bool)", p0, p1, p2, p3)); } function log(string memory p0, uint p1, string memory p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,uint,string,address)", p0, p1, p2, p3)); } function log(string memory p0, uint p1, bool p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,uint,bool,uint)", p0, p1, p2, p3)); } function log(string memory p0, uint p1, bool p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,uint,bool,string)", p0, p1, p2, p3)); } function log(string memory p0, uint p1, bool p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,uint,bool,bool)", p0, p1, p2, p3)); } function log(string memory p0, uint p1, bool p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,uint,bool,address)", p0, p1, p2, p3)); } function log(string memory p0, uint p1, address p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,uint,address,uint)", p0, p1, p2, p3)); } function log(string memory p0, uint p1, address p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,uint,address,string)", p0, p1, p2, p3)); } function log(string memory p0, uint p1, address p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,uint,address,bool)", p0, p1, p2, p3)); } function log(string memory p0, uint p1, address p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,uint,address,address)", p0, p1, p2, p3)); } function log(string memory p0, string memory p1, uint p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,string,uint,uint)", p0, p1, p2, p3)); } function log(string memory p0, string memory p1, uint p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,string,uint,string)", p0, p1, p2, p3)); } function log(string memory p0, string memory p1, uint p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,string,uint,bool)", p0, p1, p2, p3)); } function log(string memory p0, string memory p1, uint p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,string,uint,address)", p0, p1, p2, p3)); } function log(string memory p0, string memory p1, string memory p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,string,string,uint)", p0, p1, p2, p3)); } function log(string memory p0, string memory p1, string memory p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,string,string,string)", p0, p1, p2, p3)); } function log(string memory p0, string memory p1, string memory p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,string,string,bool)", p0, p1, p2, p3)); } function log(string memory p0, string memory p1, string memory p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,string,string,address)", p0, p1, p2, p3)); } function log(string memory p0, string memory p1, bool p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,string,bool,uint)", p0, p1, p2, p3)); } function log(string memory p0, string memory p1, bool p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,string,bool,string)", p0, p1, p2, p3)); } function log(string memory p0, string memory p1, bool p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,string,bool,bool)", p0, p1, p2, p3)); } function log(string memory p0, string memory p1, bool p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,string,bool,address)", p0, p1, p2, p3)); } function log(string memory p0, string memory p1, address p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,string,address,uint)", p0, p1, p2, p3)); } function log(string memory p0, string memory p1, address p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,string,address,string)", p0, p1, p2, p3)); } function log(string memory p0, string memory p1, address p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,string,address,bool)", p0, p1, p2, p3)); } function log(string memory p0, string memory p1, address p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,string,address,address)", p0, p1, p2, p3)); } function log(string memory p0, bool p1, uint p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,bool,uint,uint)", p0, p1, p2, p3)); } function log(string memory p0, bool p1, uint p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,bool,uint,string)", p0, p1, p2, p3)); } function log(string memory p0, bool p1, uint p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,bool,uint,bool)", p0, p1, p2, p3)); } function log(string memory p0, bool p1, uint p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,bool,uint,address)", p0, p1, p2, p3)); } function log(string memory p0, bool p1, string memory p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,bool,string,uint)", p0, p1, p2, p3)); } function log(string memory p0, bool p1, string memory p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,bool,string,string)", p0, p1, p2, p3)); } function log(string memory p0, bool p1, string memory p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,bool,string,bool)", p0, p1, p2, p3)); } function log(string memory p0, bool p1, string memory p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,bool,string,address)", p0, p1, p2, p3)); } function log(string memory p0, bool p1, bool p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,bool,bool,uint)", p0, p1, p2, p3)); } function log(string memory p0, bool p1, bool p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,bool,bool,string)", p0, p1, p2, p3)); } function log(string memory p0, bool p1, bool p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,bool,bool,bool)", p0, p1, p2, p3)); } function log(string memory p0, bool p1, bool p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,bool,bool,address)", p0, p1, p2, p3)); } function log(string memory p0, bool p1, address p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,bool,address,uint)", p0, p1, p2, p3)); } function log(string memory p0, bool p1, address p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,bool,address,string)", p0, p1, p2, p3)); } function log(string memory p0, bool p1, address p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,bool,address,bool)", p0, p1, p2, p3)); } function log(string memory p0, bool p1, address p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,bool,address,address)", p0, p1, p2, p3)); } function log(string memory p0, address p1, uint p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,address,uint,uint)", p0, p1, p2, p3)); } function log(string memory p0, address p1, uint p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,address,uint,string)", p0, p1, p2, p3)); } function log(string memory p0, address p1, uint p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,address,uint,bool)", p0, p1, p2, p3)); } function log(string memory p0, address p1, uint p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,address,uint,address)", p0, p1, p2, p3)); } function log(string memory p0, address p1, string memory p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,address,string,uint)", p0, p1, p2, p3)); } function log(string memory p0, address p1, string memory p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,address,string,string)", p0, p1, p2, p3)); } function log(string memory p0, address p1, string memory p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,address,string,bool)", p0, p1, p2, p3)); } function log(string memory p0, address p1, string memory p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,address,string,address)", p0, p1, p2, p3)); } function log(string memory p0, address p1, bool p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,address,bool,uint)", p0, p1, p2, p3)); } function log(string memory p0, address p1, bool p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,address,bool,string)", p0, p1, p2, p3)); } function log(string memory p0, address p1, bool p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,address,bool,bool)", p0, p1, p2, p3)); } function log(string memory p0, address p1, bool p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,address,bool,address)", p0, p1, p2, p3)); } function log(string memory p0, address p1, address p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,address,address,uint)", p0, p1, p2, p3)); } function log(string memory p0, address p1, address p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,address,address,string)", p0, p1, p2, p3)); } function log(string memory p0, address p1, address p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,address,address,bool)", p0, p1, p2, p3)); } function log(string memory p0, address p1, address p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(string,address,address,address)", p0, p1, p2, p3)); } function log(bool p0, uint p1, uint p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,uint,uint,uint)", p0, p1, p2, p3)); } function log(bool p0, uint p1, uint p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,uint,uint,string)", p0, p1, p2, p3)); } function log(bool p0, uint p1, uint p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,uint,uint,bool)", p0, p1, p2, p3)); } function log(bool p0, uint p1, uint p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,uint,uint,address)", p0, p1, p2, p3)); } function log(bool p0, uint p1, string memory p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,uint,string,uint)", p0, p1, p2, p3)); } function log(bool p0, uint p1, string memory p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,uint,string,string)", p0, p1, p2, p3)); } function log(bool p0, uint p1, string memory p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,uint,string,bool)", p0, p1, p2, p3)); } function log(bool p0, uint p1, string memory p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,uint,string,address)", p0, p1, p2, p3)); } function log(bool p0, uint p1, bool p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,uint,bool,uint)", p0, p1, p2, p3)); } function log(bool p0, uint p1, bool p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,uint,bool,string)", p0, p1, p2, p3)); } function log(bool p0, uint p1, bool p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,uint,bool,bool)", p0, p1, p2, p3)); } function log(bool p0, uint p1, bool p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,uint,bool,address)", p0, p1, p2, p3)); } function log(bool p0, uint p1, address p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,uint,address,uint)", p0, p1, p2, p3)); } function log(bool p0, uint p1, address p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,uint,address,string)", p0, p1, p2, p3)); } function log(bool p0, uint p1, address p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,uint,address,bool)", p0, p1, p2, p3)); } function log(bool p0, uint p1, address p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,uint,address,address)", p0, p1, p2, p3)); } function log(bool p0, string memory p1, uint p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,string,uint,uint)", p0, p1, p2, p3)); } function log(bool p0, string memory p1, uint p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,string,uint,string)", p0, p1, p2, p3)); } function log(bool p0, string memory p1, uint p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,string,uint,bool)", p0, p1, p2, p3)); } function log(bool p0, string memory p1, uint p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,string,uint,address)", p0, p1, p2, p3)); } function log(bool p0, string memory p1, string memory p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,string,string,uint)", p0, p1, p2, p3)); } function log(bool p0, string memory p1, string memory p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,string,string,string)", p0, p1, p2, p3)); } function log(bool p0, string memory p1, string memory p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,string,string,bool)", p0, p1, p2, p3)); } function log(bool p0, string memory p1, string memory p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,string,string,address)", p0, p1, p2, p3)); } function log(bool p0, string memory p1, bool p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,string,bool,uint)", p0, p1, p2, p3)); } function log(bool p0, string memory p1, bool p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,string,bool,string)", p0, p1, p2, p3)); } function log(bool p0, string memory p1, bool p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,string,bool,bool)", p0, p1, p2, p3)); } function log(bool p0, string memory p1, bool p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,string,bool,address)", p0, p1, p2, p3)); } function log(bool p0, string memory p1, address p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,string,address,uint)", p0, p1, p2, p3)); } function log(bool p0, string memory p1, address p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,string,address,string)", p0, p1, p2, p3)); } function log(bool p0, string memory p1, address p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,string,address,bool)", p0, p1, p2, p3)); } function log(bool p0, string memory p1, address p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,string,address,address)", p0, p1, p2, p3)); } function log(bool p0, bool p1, uint p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,bool,uint,uint)", p0, p1, p2, p3)); } function log(bool p0, bool p1, uint p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,bool,uint,string)", p0, p1, p2, p3)); } function log(bool p0, bool p1, uint p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,bool,uint,bool)", p0, p1, p2, p3)); } function log(bool p0, bool p1, uint p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,bool,uint,address)", p0, p1, p2, p3)); } function log(bool p0, bool p1, string memory p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,bool,string,uint)", p0, p1, p2, p3)); } function log(bool p0, bool p1, string memory p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,bool,string,string)", p0, p1, p2, p3)); } function log(bool p0, bool p1, string memory p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,bool,string,bool)", p0, p1, p2, p3)); } function log(bool p0, bool p1, string memory p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,bool,string,address)", p0, p1, p2, p3)); } function log(bool p0, bool p1, bool p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,bool,bool,uint)", p0, p1, p2, p3)); } function log(bool p0, bool p1, bool p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,bool,bool,string)", p0, p1, p2, p3)); } function log(bool p0, bool p1, bool p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,bool,bool,bool)", p0, p1, p2, p3)); } function log(bool p0, bool p1, bool p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,bool,bool,address)", p0, p1, p2, p3)); } function log(bool p0, bool p1, address p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,bool,address,uint)", p0, p1, p2, p3)); } function log(bool p0, bool p1, address p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,bool,address,string)", p0, p1, p2, p3)); } function log(bool p0, bool p1, address p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,bool,address,bool)", p0, p1, p2, p3)); } function log(bool p0, bool p1, address p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,bool,address,address)", p0, p1, p2, p3)); } function log(bool p0, address p1, uint p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,address,uint,uint)", p0, p1, p2, p3)); } function log(bool p0, address p1, uint p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,address,uint,string)", p0, p1, p2, p3)); } function log(bool p0, address p1, uint p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,address,uint,bool)", p0, p1, p2, p3)); } function log(bool p0, address p1, uint p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,address,uint,address)", p0, p1, p2, p3)); } function log(bool p0, address p1, string memory p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,address,string,uint)", p0, p1, p2, p3)); } function log(bool p0, address p1, string memory p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,address,string,string)", p0, p1, p2, p3)); } function log(bool p0, address p1, string memory p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,address,string,bool)", p0, p1, p2, p3)); } function log(bool p0, address p1, string memory p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,address,string,address)", p0, p1, p2, p3)); } function log(bool p0, address p1, bool p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,address,bool,uint)", p0, p1, p2, p3)); } function log(bool p0, address p1, bool p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,address,bool,string)", p0, p1, p2, p3)); } function log(bool p0, address p1, bool p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,address,bool,bool)", p0, p1, p2, p3)); } function log(bool p0, address p1, bool p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,address,bool,address)", p0, p1, p2, p3)); } function log(bool p0, address p1, address p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,address,address,uint)", p0, p1, p2, p3)); } function log(bool p0, address p1, address p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,address,address,string)", p0, p1, p2, p3)); } function log(bool p0, address p1, address p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,address,address,bool)", p0, p1, p2, p3)); } function log(bool p0, address p1, address p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(bool,address,address,address)", p0, p1, p2, p3)); } function log(address p0, uint p1, uint p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,uint,uint,uint)", p0, p1, p2, p3)); } function log(address p0, uint p1, uint p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,uint,uint,string)", p0, p1, p2, p3)); } function log(address p0, uint p1, uint p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,uint,uint,bool)", p0, p1, p2, p3)); } function log(address p0, uint p1, uint p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,uint,uint,address)", p0, p1, p2, p3)); } function log(address p0, uint p1, string memory p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,uint,string,uint)", p0, p1, p2, p3)); } function log(address p0, uint p1, string memory p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,uint,string,string)", p0, p1, p2, p3)); } function log(address p0, uint p1, string memory p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,uint,string,bool)", p0, p1, p2, p3)); } function log(address p0, uint p1, string memory p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,uint,string,address)", p0, p1, p2, p3)); } function log(address p0, uint p1, bool p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,uint,bool,uint)", p0, p1, p2, p3)); } function log(address p0, uint p1, bool p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,uint,bool,string)", p0, p1, p2, p3)); } function log(address p0, uint p1, bool p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,uint,bool,bool)", p0, p1, p2, p3)); } function log(address p0, uint p1, bool p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,uint,bool,address)", p0, p1, p2, p3)); } function log(address p0, uint p1, address p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,uint,address,uint)", p0, p1, p2, p3)); } function log(address p0, uint p1, address p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,uint,address,string)", p0, p1, p2, p3)); } function log(address p0, uint p1, address p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,uint,address,bool)", p0, p1, p2, p3)); } function log(address p0, uint p1, address p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,uint,address,address)", p0, p1, p2, p3)); } function log(address p0, string memory p1, uint p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,string,uint,uint)", p0, p1, p2, p3)); } function log(address p0, string memory p1, uint p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,string,uint,string)", p0, p1, p2, p3)); } function log(address p0, string memory p1, uint p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,string,uint,bool)", p0, p1, p2, p3)); } function log(address p0, string memory p1, uint p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,string,uint,address)", p0, p1, p2, p3)); } function log(address p0, string memory p1, string memory p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,string,string,uint)", p0, p1, p2, p3)); } function log(address p0, string memory p1, string memory p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,string,string,string)", p0, p1, p2, p3)); } function log(address p0, string memory p1, string memory p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,string,string,bool)", p0, p1, p2, p3)); } function log(address p0, string memory p1, string memory p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,string,string,address)", p0, p1, p2, p3)); } function log(address p0, string memory p1, bool p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,string,bool,uint)", p0, p1, p2, p3)); } function log(address p0, string memory p1, bool p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,string,bool,string)", p0, p1, p2, p3)); } function log(address p0, string memory p1, bool p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,string,bool,bool)", p0, p1, p2, p3)); } function log(address p0, string memory p1, bool p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,string,bool,address)", p0, p1, p2, p3)); } function log(address p0, string memory p1, address p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,string,address,uint)", p0, p1, p2, p3)); } function log(address p0, string memory p1, address p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,string,address,string)", p0, p1, p2, p3)); } function log(address p0, string memory p1, address p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,string,address,bool)", p0, p1, p2, p3)); } function log(address p0, string memory p1, address p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,string,address,address)", p0, p1, p2, p3)); } function log(address p0, bool p1, uint p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,bool,uint,uint)", p0, p1, p2, p3)); } function log(address p0, bool p1, uint p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,bool,uint,string)", p0, p1, p2, p3)); } function log(address p0, bool p1, uint p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,bool,uint,bool)", p0, p1, p2, p3)); } function log(address p0, bool p1, uint p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,bool,uint,address)", p0, p1, p2, p3)); } function log(address p0, bool p1, string memory p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,bool,string,uint)", p0, p1, p2, p3)); } function log(address p0, bool p1, string memory p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,bool,string,string)", p0, p1, p2, p3)); } function log(address p0, bool p1, string memory p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,bool,string,bool)", p0, p1, p2, p3)); } function log(address p0, bool p1, string memory p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,bool,string,address)", p0, p1, p2, p3)); } function log(address p0, bool p1, bool p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,bool,bool,uint)", p0, p1, p2, p3)); } function log(address p0, bool p1, bool p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,bool,bool,string)", p0, p1, p2, p3)); } function log(address p0, bool p1, bool p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,bool,bool,bool)", p0, p1, p2, p3)); } function log(address p0, bool p1, bool p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,bool,bool,address)", p0, p1, p2, p3)); } function log(address p0, bool p1, address p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,bool,address,uint)", p0, p1, p2, p3)); } function log(address p0, bool p1, address p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,bool,address,string)", p0, p1, p2, p3)); } function log(address p0, bool p1, address p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,bool,address,bool)", p0, p1, p2, p3)); } function log(address p0, bool p1, address p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,bool,address,address)", p0, p1, p2, p3)); } function log(address p0, address p1, uint p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,address,uint,uint)", p0, p1, p2, p3)); } function log(address p0, address p1, uint p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,address,uint,string)", p0, p1, p2, p3)); } function log(address p0, address p1, uint p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,address,uint,bool)", p0, p1, p2, p3)); } function log(address p0, address p1, uint p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,address,uint,address)", p0, p1, p2, p3)); } function log(address p0, address p1, string memory p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,address,string,uint)", p0, p1, p2, p3)); } function log(address p0, address p1, string memory p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,address,string,string)", p0, p1, p2, p3)); } function log(address p0, address p1, string memory p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,address,string,bool)", p0, p1, p2, p3)); } function log(address p0, address p1, string memory p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,address,string,address)", p0, p1, p2, p3)); } function log(address p0, address p1, bool p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,address,bool,uint)", p0, p1, p2, p3)); } function log(address p0, address p1, bool p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,address,bool,string)", p0, p1, p2, p3)); } function log(address p0, address p1, bool p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,address,bool,bool)", p0, p1, p2, p3)); } function log(address p0, address p1, bool p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,address,bool,address)", p0, p1, p2, p3)); } function log(address p0, address p1, address p2, uint p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,address,address,uint)", p0, p1, p2, p3)); } function log(address p0, address p1, address p2, string memory p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,address,address,string)", p0, p1, p2, p3)); } function log(address p0, address p1, address p2, bool p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,address,address,bool)", p0, p1, p2, p3)); } function log(address p0, address p1, address p2, address p3) internal view { _sendLogPayload(abi.encodeWithSignature("log(address,address,address,address)", p0, p1, p2, p3)); } } // File contracts/Anon.sol contract Anon is Ownable, ERC721 { using SafeMath for uint256; /** Tile related configurations */ // Token IDs are from 0 to 10132 uint256 internal constant ALL_TOKEN_NUM = 10133; /** Draw related configurations */ // proof of state of all tiles string public constant SHA256 = "253762fe521a835df8726d8c614f0f7bbb86e67690b422e0c3556d7b4d5e146d"; // Have 3 different draws uint256 internal constant ALL_DRAW_NUM = 3; // can draw 1 token, 5 tokens or 10 tokens together enum DrawLevel {One, Five, Ten} struct Draw { DrawLevel level; // the total price uint256 price; // how many tokens to get uint256 number; } Draw[ALL_DRAW_NUM] internal allDraws; /** Draw & Mint related stats */ // how many tokens are sold uint256 internal soldNumber; // The user actions are enabled or not, default true bool internal enabled = true; // withdraw splits uint256 internal constant ALL_SLICE_NUM = 6; struct Slice { string name; address to; uint256 share; // percentage } Slice[ALL_SLICE_NUM] internal slices; // gift fund uint256 internal giftFund; // the remaining fund needs to send to giftFundAddress address internal giftFundAddress; /** Events */ // Emit the event when user play the game event PlayRequestReceived( address indexed toAddress, uint256 indexed gameId, uint256 indexed encrypted ); // Emit the event when user draw event TokenDrawn(string indexed uuid, uint256[] tokens); /** constructor */ constructor( string memory _name, string memory _symbol ) public ERC721(_name, _symbol) { // init draw conf allDraws[0] = Draw({level: DrawLevel.One, price: 0.1 ether, number: 1}); allDraws[1] = Draw({ level: DrawLevel.Five, price: 0.45 ether, number: 5 }); allDraws[2] = Draw({level: DrawLevel.Ten, price: 0.8 ether, number: 10}); // init withdraw splits slices[0] = Slice({name: "Anna", to: address(0x31ee1e6A5adf01d86CB5835c1FC08b8D3D547b4e), share: 27}); slices[1] = Slice({name: "Elsa", to: address(0x8ee2DAdEfd72f17e35FDC85136C244f7EE05Dfa5), share: 20}); slices[2] = Slice({name: "Mickey", to: address(0xa652b59F2b685564563556B54F8aD1F8Bec9Ea7b), share: 20}); slices[3] = Slice({name: "Belle", to: address(0x0Cc7eb98B12E8483C3a5d64995d1543B22a9a9dB), share: 20}); slices[4] = Slice({name: "Dumbo", to: address(0xb680073B79eFFcdf6F599B5614DCAC54568612fa), share: 12}); slices[5] = Slice({name: "Goofy", to: address(0xE10012bC19838f43ee54CfD6a44293A2667b7F44), share: 1}); // init gift funds giftFund = 60 ether; giftFundAddress = address(0x31C423e089EdF3748697408456EfA98836816AA7); } /** user facing functions */ modifier onlyWhenEnabled() { require(enabled, "Contract is disabled, please come back later"); _; } // user call this function to draw function draw(string memory uuid) public onlyWhenEnabled payable { uint256 number; for (uint256 i = 0; i < ALL_DRAW_NUM; i++) { if (allDraws[i].price == msg.value) { number = allDraws[i].number; break; } } require( number > 0, "Invalid price, please pay either 0.1 ETH for 1 draw or 0.45 ETH for 5 draws or 0.8 ETH for 10 draws" ); uint256 newSoldNumber = soldNumber + number; require(newSoldNumber <= ALL_TOKEN_NUM, "Not enough supply"); uint256[] memory tokens = new uint256[](number); for (uint256 i = 0; i < number; i++) { // tokenId is taken sequential uint256 tokenId = soldNumber + i; // mint the token immediately _mint(msg.sender, tokenId); tokens[i] = tokenId; } // update the sold number soldNumber = newSoldNumber; // Emit token drawn event emit TokenDrawn(uuid, tokens); } // user call this function to play function play(uint256 gameId, uint256 encrypted) public onlyWhenEnabled { emit PlayRequestReceived(msg.sender, gameId, encrypted); } /** OpenSea facing functions */ function contractURI() public view returns (string memory) { string memory base = baseURI(); // If there is no base URI, return the token URI. if (bytes(base).length == 0) { return ""; } return string(abi.encodePacked(base, "opensea-metadata")); } /** admin facing functions */ function setEnabled(bool _enabled) public onlyOwner { enabled = _enabled; } function _payout(address to, uint256 value) internal { (bool success, ) = to.call{value: value}(""); require(success, "Payout failed"); } function withdraw() public onlyOwner { uint256 amount = address(this).balance; // always payout to gift fund first if (giftFund > 0) { uint256 value; if (amount > giftFund) { value = giftFund; giftFund = 0; } else { value = amount; giftFund -= amount; } _payout(giftFundAddress, value); return; } // payout to slices if gift fund has already paid out uint256 paid = 0; // loop except the last one for (uint256 i = 0; i < ALL_SLICE_NUM - 1; i++) { uint256 value = amount * slices[i].share / 100; _payout(slices[i].to, value); paid += value; } // payout the remaining to the last slice // - sum of percentages is 100, paying the remaining fund is the same // - paying the remaining to avoid potential rounding bug _payout(slices[ALL_SLICE_NUM - 1].to, amount - paid); } function setBaseURI(string memory baseURI_) public onlyOwner { _setBaseURI(baseURI_); } } // File @openzeppelin/contracts/token/ERC20/[email protected] /** * @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/[email protected] /** * @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 contracts/DummyERC20.sol contract DummyERC20 is ERC20 { constructor () public ERC20("Dummy ERC20", "DUMMY") { _mint(msg.sender, 10 * 10**6 * 10**18); } } // File contracts/DummyLINK.sol contract DummyLINK is ERC20 { constructor () public ERC20("Dummy LINK", "DUMMYLINK") { _mint(msg.sender, 10 * 10**6 * 10**18); } function decreaseApproval(address spender, uint256 subtractedValue) external returns (bool success) { return decreaseAllowance(spender, subtractedValue); } function increaseApproval(address spender, uint256 addedValue) external { increaseAllowance(spender, addedValue); } function transferAndCall(address to, uint256 value, bytes calldata data) external returns (bool success) { transfer(to, value); return true; } } // File @chainlink/contracts/src/v0.6/interfaces/[email protected] interface LinkTokenInterface { function allowance(address owner, address spender) external view returns (uint256 remaining); function approve(address spender, uint256 value) external returns (bool success); function balanceOf(address owner) external view returns (uint256 balance); function decimals() external view returns (uint8 decimalPlaces); function decreaseApproval(address spender, uint256 addedValue) external returns (bool success); function increaseApproval(address spender, uint256 subtractedValue) external; function name() external view returns (string memory tokenName); function symbol() external view returns (string memory tokenSymbol); function totalSupply() external view returns (uint256 totalTokensIssued); function transfer(address to, uint256 value) external returns (bool success); function transferAndCall(address to, uint256 value, bytes calldata data) external returns (bool success); function transferFrom(address from, address to, uint256 value) external returns (bool success); } // File @chainlink/contracts/src/v0.6/vendor/[email protected] /** * @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 SafeMathChainlink { /** * @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"); 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-solidity/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) { // Solidity only automatically asserts when dividing by 0 require(b > 0, "SafeMath: division by zero"); 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) { require(b != 0, "SafeMath: modulo by zero"); return a % b; } } // File @chainlink/contracts/src/v0.6/[email protected] contract VRFRequestIDBase { /** * @notice returns the seed which is actually input to the VRF coordinator * * @dev To prevent repetition of VRF output due to repetition of the * @dev user-supplied seed, that seed is combined in a hash with the * @dev user-specific nonce, and the address of the consuming contract. The * @dev risk of repetition is mostly mitigated by inclusion of a blockhash in * @dev the final seed, but the nonce does protect against repetition in * @dev requests which are included in a single block. * * @param _userSeed VRF seed input provided by user * @param _requester Address of the requesting contract * @param _nonce User-specific nonce at the time of the request */ function makeVRFInputSeed(bytes32 _keyHash, uint256 _userSeed, address _requester, uint256 _nonce) internal pure returns (uint256) { return uint256(keccak256(abi.encode(_keyHash, _userSeed, _requester, _nonce))); } /** * @notice Returns the id for this request * @param _keyHash The serviceAgreement ID to be used for this request * @param _vRFInputSeed The seed to be passed directly to the VRF * @return The id for this request * * @dev Note that _vRFInputSeed is not the seed passed by the consuming * @dev contract, but the one generated by makeVRFInputSeed */ function makeRequestId( bytes32 _keyHash, uint256 _vRFInputSeed) internal pure returns (bytes32) { return keccak256(abi.encodePacked(_keyHash, _vRFInputSeed)); } } // File @chainlink/contracts/src/v0.6/[email protected] /** **************************************************************************** * @notice Interface for contracts using VRF randomness * ***************************************************************************** * @dev PURPOSE * * @dev Reggie the Random Oracle (not his real job) wants to provide randomness * @dev to Vera the verifier in such a way that Vera can be sure he's not * @dev making his output up to suit himself. Reggie provides Vera a public key * @dev to which he knows the secret key. Each time Vera provides a seed to * @dev Reggie, he gives back a value which is computed completely * @dev deterministically from the seed and the secret key. * * @dev Reggie provides a proof by which Vera can verify that the output was * @dev correctly computed once Reggie tells it to her, but without that proof, * @dev the output is indistinguishable to her from a uniform random sample * @dev from the output space. * * @dev The purpose of this contract is to make it easy for unrelated contracts * @dev to talk to Vera the verifier about the work Reggie is doing, to provide * @dev simple access to a verifiable source of randomness. * ***************************************************************************** * @dev USAGE * * @dev Calling contracts must inherit from VRFConsumerBase, and can * @dev initialize VRFConsumerBase's attributes in their constructor as * @dev shown: * * @dev contract VRFConsumer { * @dev constuctor(<other arguments>, address _vrfCoordinator, address _link) * @dev VRFConsumerBase(_vrfCoordinator, _link) public { * @dev <initialization with other arguments goes here> * @dev } * @dev } * * @dev The oracle will have given you an ID for the VRF keypair they have * @dev committed to (let's call it keyHash), and have told you the minimum LINK * @dev price for VRF service. Make sure your contract has sufficient LINK, and * @dev call requestRandomness(keyHash, fee, seed), where seed is the input you * @dev want to generate randomness from. * * @dev Once the VRFCoordinator has received and validated the oracle's response * @dev to your request, it will call your contract's fulfillRandomness method. * * @dev The randomness argument to fulfillRandomness is the actual random value * @dev generated from your seed. * * @dev The requestId argument is generated from the keyHash and the seed by * @dev makeRequestId(keyHash, seed). If your contract could have concurrent * @dev requests open, you can use the requestId to track which seed is * @dev associated with which randomness. See VRFRequestIDBase.sol for more * @dev details. (See "SECURITY CONSIDERATIONS" for principles to keep in mind, * @dev if your contract could have multiple requests in flight simultaneously.) * * @dev Colliding `requestId`s are cryptographically impossible as long as seeds * @dev differ. (Which is critical to making unpredictable randomness! See the * @dev next section.) * * ***************************************************************************** * @dev SECURITY CONSIDERATIONS * * @dev A method with the ability to call your fulfillRandomness method directly * @dev could spoof a VRF response with any random value, so it's critical that * @dev it cannot be directly called by anything other than this base contract * @dev (specifically, by the VRFConsumerBase.rawFulfillRandomness method). * * @dev For your users to trust that your contract's random behavior is free * @dev from malicious interference, it's best if you can write it so that all * @dev behaviors implied by a VRF response are executed *during* your * @dev fulfillRandomness method. If your contract must store the response (or * @dev anything derived from it) and use it later, you must ensure that any * @dev user-significant behavior which depends on that stored value cannot be * @dev manipulated by a subsequent VRF request. * * @dev Similarly, both miners and the VRF oracle itself have some influence * @dev over the order in which VRF responses appear on the blockchain, so if * @dev your contract could have multiple VRF requests in flight simultaneously, * @dev you must ensure that the order in which the VRF responses arrive cannot * @dev be used to manipulate your contract's user-significant behavior. * * @dev Since the ultimate input to the VRF is mixed with the block hash of the * @dev block in which the request is made, user-provided seeds have no impact * @dev on its economic security properties. They are only included for API * @dev compatability with previous versions of this contract. * * @dev Since the block hash of the block which contains the requestRandomness * @dev call is mixed into the input to the VRF *last*, a sufficiently powerful * @dev miner could, in principle, fork the blockchain to evict the block * @dev containing the request, forcing the request to be included in a * @dev different block with a different hash, and therefore a different input * @dev to the VRF. However, such an attack would incur a substantial economic * @dev cost. This cost scales with the number of blocks the VRF oracle waits * @dev until it calls responds to a request. */ abstract contract VRFConsumerBase is VRFRequestIDBase { using SafeMathChainlink for uint256; /** * @notice fulfillRandomness handles the VRF response. Your contract must * @notice implement it. See "SECURITY CONSIDERATIONS" above for important * @notice principles to keep in mind when implementing your fulfillRandomness * @notice method. * * @dev VRFConsumerBase expects its subcontracts to have a method with this * @dev signature, and will call it once it has verified the proof * @dev associated with the randomness. (It is triggered via a call to * @dev rawFulfillRandomness, below.) * * @param requestId The Id initially returned by requestRandomness * @param randomness the VRF output */ function fulfillRandomness(bytes32 requestId, uint256 randomness) internal virtual; /** * @notice requestRandomness initiates a request for VRF output given _seed * * @dev The fulfillRandomness method receives the output, once it's provided * @dev by the Oracle, and verified by the vrfCoordinator. * * @dev The _keyHash must already be registered with the VRFCoordinator, and * @dev the _fee must exceed the fee specified during registration of the * @dev _keyHash. * * @dev The _seed parameter is vestigial, and is kept only for API * @dev compatibility with older versions. It can't *hurt* to mix in some of * @dev your own randomness, here, but it's not necessary because the VRF * @dev oracle will mix the hash of the block containing your request into the * @dev VRF seed it ultimately uses. * * @param _keyHash ID of public key against which randomness is generated * @param _fee The amount of LINK to send with the request * @param _seed seed mixed into the input of the VRF. * * @return requestId unique ID for this request * * @dev The returned requestId can be used to distinguish responses to * @dev concurrent requests. It is passed as the first argument to * @dev fulfillRandomness. */ function requestRandomness(bytes32 _keyHash, uint256 _fee, uint256 _seed) internal returns (bytes32 requestId) { LINK.transferAndCall(vrfCoordinator, _fee, abi.encode(_keyHash, _seed)); // This is the seed passed to VRFCoordinator. The oracle will mix this with // the hash of the block containing this request to obtain the seed/input // which is finally passed to the VRF cryptographic machinery. uint256 vRFSeed = makeVRFInputSeed(_keyHash, _seed, address(this), nonces[_keyHash]); // nonces[_keyHash] must stay in sync with // VRFCoordinator.nonces[_keyHash][this], which was incremented by the above // successful LINK.transferAndCall (in VRFCoordinator.randomnessRequest). // This provides protection against the user repeating their input seed, // which would result in a predictable/duplicate output, if multiple such // requests appeared in the same block. nonces[_keyHash] = nonces[_keyHash].add(1); return makeRequestId(_keyHash, vRFSeed); } LinkTokenInterface immutable internal LINK; address immutable private vrfCoordinator; // Nonces for each VRF key from which randomness has been requested. // // Must stay in sync with VRFCoordinator[_keyHash][this] mapping(bytes32 /* keyHash */ => uint256 /* nonce */) private nonces; /** * @param _vrfCoordinator address of VRFCoordinator contract * @param _link address of LINK token contract * * @dev https://docs.chain.link/docs/link-token-contracts */ constructor(address _vrfCoordinator, address _link) public { vrfCoordinator = _vrfCoordinator; LINK = LinkTokenInterface(_link); } // rawFulfillRandomness is called by VRFCoordinator when it receives a valid VRF // proof. rawFulfillRandomness then calls fulfillRandomness, after validating // the origin of the call function rawFulfillRandomness(bytes32 requestId, uint256 randomness) external { require(msg.sender == vrfCoordinator, "Only VRFCoordinator can fulfill"); fulfillRandomness(requestId, randomness); } } // File contracts/DummyVRF.sol contract DummyVRF { LinkTokenInterface public LINK; event RandomnessRequest(address indexed sender, bytes32 indexed keyHash, uint256 indexed seed); constructor(address linkAddress) public { LINK = LinkTokenInterface(linkAddress); } function onTokenTransfer(address sender, uint256 fee, bytes memory _data) public { (bytes32 keyHash, uint256 seed) = abi.decode(_data, (bytes32, uint256)); emit RandomnessRequest(sender, keyHash, seed); } function callBackWithRandomness( bytes32 requestId, uint256 randomness, address consumerContract ) public { VRFConsumerBase v; bytes memory resp = abi.encodeWithSelector(v.rawFulfillRandomness.selector, requestId, randomness); uint256 b = 206000; require(gasleft() >= b, "not enough gas for consumer"); (bool success,) = consumerContract.call(resp); } } // File contracts/OpenSeaMatic.sol /** * https://github.com/maticnetwork/pos-portal/blob/master/contracts/common/ContextMixin.sol */ abstract contract ContextMixin { function msgSender() internal view returns (address payable sender) { if (msg.sender == address(this)) { bytes memory array = msg.data; uint256 index = msg.data.length; assembly { // Load the 32 bytes word from memory with the address on the lower 20 bytes, and mask those. sender := and( mload(add(array, index)), 0xffffffffffffffffffffffffffffffffffffffff ) } } else { sender = msg.sender; } return sender; } } /** * https://github.com/maticnetwork/pos-portal/blob/master/contracts/common/Initializable.sol */ contract Initializable { bool inited = false; modifier initializer() { require(!inited, "already inited"); _; inited = true; } } /** * https://github.com/maticnetwork/pos-portal/blob/master/contracts/common/EIP712Base.sol */ contract EIP712Base is Initializable { struct EIP712Domain { string name; string version; address verifyingContract; bytes32 salt; } string constant public ERC712_VERSION = "1"; bytes32 internal constant EIP712_DOMAIN_TYPEHASH = keccak256( bytes( "EIP712Domain(string name,string version,address verifyingContract,bytes32 salt)" ) ); bytes32 internal domainSeperator; // supposed to be called once while initializing. // one of the contractsa that inherits this contract follows proxy pattern // so it is not possible to do this in a constructor function _initializeEIP712( string memory name ) internal initializer { _setDomainSeperator(name); } function _setDomainSeperator(string memory name) internal { domainSeperator = keccak256( abi.encode( EIP712_DOMAIN_TYPEHASH, keccak256(bytes(name)), keccak256(bytes(ERC712_VERSION)), address(this), bytes32(getChainId()) ) ); } function getDomainSeperator() public view returns (bytes32) { return domainSeperator; } function getChainId() public pure returns (uint256) { uint256 id; assembly { id := chainid() } return id; } /** * Accept message hash and returns hash message in EIP712 compatible form * So that it can be used to recover signer from signature signed using EIP712 formatted data * https://eips.ethereum.org/EIPS/eip-712 * "\\x19" makes the encoding deterministic * "\\x01" is the version byte to make it compatible to EIP-191 */ function toTypedMessageHash(bytes32 messageHash) internal view returns (bytes32) { return keccak256( abi.encodePacked("\x19\x01", getDomainSeperator(), messageHash) ); } } /** * https://github.com/maticnetwork/pos-portal/blob/master/contracts/common/NativeMetaTransaction.sol */ contract NativeMetaTransaction is EIP712Base { using SafeMath for uint256; bytes32 private constant META_TRANSACTION_TYPEHASH = keccak256( bytes( "MetaTransaction(uint256 nonce,address from,bytes functionSignature)" ) ); event MetaTransactionExecuted( address userAddress, address payable relayerAddress, bytes functionSignature ); mapping(address => uint256) nonces; /* * Meta transaction structure. * No point of including value field here as if user is doing value transfer then he has the funds to pay for gas * He should call the desired function directly in that case. */ struct MetaTransaction { uint256 nonce; address from; bytes functionSignature; } function executeMetaTransaction( address userAddress, bytes memory functionSignature, bytes32 sigR, bytes32 sigS, uint8 sigV ) public payable returns (bytes memory) { MetaTransaction memory metaTx = MetaTransaction({ nonce: nonces[userAddress], from: userAddress, functionSignature: functionSignature }); require( verify(userAddress, metaTx, sigR, sigS, sigV), "Signer and signature do not match" ); // increase nonce for user (to avoid re-use) nonces[userAddress] = nonces[userAddress].add(1); emit MetaTransactionExecuted( userAddress, msg.sender, functionSignature ); // Append userAddress and relayer address at the end to extract it from calling context (bool success, bytes memory returnData) = address(this).call( abi.encodePacked(functionSignature, userAddress) ); require(success, "Function call not successful"); return returnData; } function hashMetaTransaction(MetaTransaction memory metaTx) internal pure returns (bytes32) { return keccak256( abi.encode( META_TRANSACTION_TYPEHASH, metaTx.nonce, metaTx.from, keccak256(metaTx.functionSignature) ) ); } function getNonce(address user) public view returns (uint256 nonce) { nonce = nonces[user]; } function verify( address signer, MetaTransaction memory metaTx, bytes32 sigR, bytes32 sigS, uint8 sigV ) internal view returns (bool) { require(signer != address(0), "NativeMetaTransaction: INVALID_SIGNER"); return signer == ecrecover( toTypedMessageHash(hashMetaTransaction(metaTx)), sigV, sigR, sigS ); } }
Contract Security Audit
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[{"inputs":[{"internalType":"string","name":"_name","type":"string"},{"internalType":"string","name":"_symbol","type":"string"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"approved","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"operator","type":"address"},{"indexed":false,"internalType":"bool","name":"approved","type":"bool"}],"name":"ApprovalForAll","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"toAddress","type":"address"},{"indexed":true,"internalType":"uint256","name":"gameId","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"encrypted","type":"uint256"}],"name":"PlayRequestReceived","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"string","name":"uuid","type":"string"},{"indexed":false,"internalType":"uint256[]","name":"tokens","type":"uint256[]"}],"name":"TokenDrawn","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[],"name":"SHA256","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"approve","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"baseURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"contractURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"uuid","type":"string"}],"name":"draw","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getApproved","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"operator","type":"address"}],"name":"isApprovedForAll","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"ownerOf","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"gameId","type":"uint256"},{"internalType":"uint256","name":"encrypted","type":"uint256"}],"name":"play","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"bool","name":"approved","type":"bool"}],"name":"setApprovalForAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"baseURI_","type":"string"}],"name":"setBaseURI","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"_enabled","type":"bool"}],"name":"setEnabled","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"index","type":"uint256"}],"name":"tokenByIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"uint256","name":"index","type":"uint256"}],"name":"tokenOfOwnerByIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"tokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"transferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000800000000000000000000000000000000000000000000000000000000000000004414e4f4e000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000004414e4f4e00000000000000000000000000000000000000000000000000000000
-----Decoded View---------------
Arg [0] : _name (string): ANON
Arg [1] : _symbol (string): ANON
-----Encoded View---------------
6 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000040
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000080
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000004
Arg [3] : 414e4f4e00000000000000000000000000000000000000000000000000000000
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000004
Arg [5] : 414e4f4e00000000000000000000000000000000000000000000000000000000
Deployed Bytecode Sourcemap
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Swarm Source
ipfs://1f4dd151eb9a249b28e322d14ae5fc4a3e80e55465975c080e24d65b5bd1007a
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A token is a representation of an on-chain or off-chain asset. The token page shows information such as price, total supply, holders, transfers and social links. Learn more about this page in our Knowledge Base.