Contract Source Code:
File 1 of 1 : cleostake
// SPDX-License-Identifier: MIT LICENSE
// File: @openzeppelin/contracts/utils/Strings.sol
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// File: @openzeppelin/contracts/utils/Context.sol
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File: @openzeppelin/contracts/utils/Address.sol
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File: @openzeppelin/contracts/utils/introspection/IERC165.sol
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/contracts/utils/introspection/ERC165.sol
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// File: @openzeppelin/contracts/token/ERC721/IERC721.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// File: @openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File: @openzeppelin/contracts/token/ERC721/ERC721.sol
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/ERC721.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
_setApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
_afterTokenTransfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
_afterTokenTransfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
_afterTokenTransfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Approve `operator` to operate on all of `owner` tokens
*
* Emits a {ApprovalForAll} event.
*/
function _setApprovalForAll(
address owner,
address operator,
bool approved
) internal virtual {
require(owner != operator, "ERC721: approve to caller");
_operatorApprovals[owner][operator] = approved;
emit ApprovalForAll(owner, operator, approved);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
// File: contracts/cleostake.sol
pragma solidity ^0.8.9;
interface ICLEOP {
function ownerOf(uint id) external view returns (address);
function isCobra(uint16 id) external view returns (bool);
function transferFrom(address from, address to, uint tokenId) external;
function safeTransferFrom(address from, address to, uint tokenId, bytes memory _data) external;
}
interface ICLEO {
function mint(address account, uint amount) external;
}
contract cleostake is Ownable, IERC721Receiver {
bool private _paused = false;
uint16 private _randomIndex = 0;
uint private _randomCalls = 0;
mapping(uint => address) private _randomSource;
struct cleoStake {
uint16 tokenId;
uint80 value;
address owner;
uint level;
uint stakeOwed;
}
struct cobraStake {
uint16 tokenId;
uint80 value;
address owner;
uint stakeOwed;
}
event TokenStaked(address owner, uint16 tokenId, uint value);
event cleoClaimed(uint16 tokenId, uint earned, bool unstaked);
event cobraClaimed(uint16 tokenId, uint earned, bool unstaked);
event cleoCoinStolen(uint16 tokenId, uint stolen);
ICLEOP public cleop;
ICLEO public cleo;
mapping(uint256 => uint256) public cleoIndices;
mapping(address => cleoStake[]) public cleoStaked;
mapping (uint256 => uint256) public levels;
address[] public cleoHolders;
mapping(uint256 => uint256) public cobraIndices;
mapping(address => cobraStake[]) public cobraStaked;
address[] public cobraHolders;
// Total staked tokens
uint public totalCleosStaked;
uint public totalCobrasStaked = 0;
uint public unaccountedRewards = 0;
// GoldMiner earn 10000 $GGOLD per day
uint public DAILY_CLEO_RATE = 1 ether;
uint public MINIMUM_TIME_TO_EXIT = 0 days;
uint public TAX_PERCENTAGE = 20;
uint public MAXIMUM_GLOBAL_CLEO = 2300000 ether;
uint public totalCleoEarned;
uint public lastClaimTimestamp;
uint public cobraReward = 0;
// emergency rescue to allow unstaking without any checks but without $GGOLD
bool public rescueEnabled = false;
constructor() {
// Fill random source addresses
_randomSource[0] = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
_randomSource[1] = 0x3cD751E6b0078Be393132286c442345e5DC49699;
_randomSource[2] = 0xb5d85CBf7cB3EE0D56b3bB207D5Fc4B82f43F511;
_randomSource[3] = 0xC098B2a3Aa256D2140208C3de6543aAEf5cd3A94;
_randomSource[4] = 0x28C6c06298d514Db089934071355E5743bf21d60;
_randomSource[5] = 0x2FAF487A4414Fe77e2327F0bf4AE2a264a776AD2;
_randomSource[6] = 0x267be1C1D684F78cb4F6a176C4911b741E4Ffdc0;
}
function paused() public view virtual returns (bool) {
return _paused;
}
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
function setCleoP(address _cleop) external onlyOwner {
cleop = ICLEOP(_cleop);
}
function setCleoRate(uint _newRate) external onlyOwner {
DAILY_CLEO_RATE = _newRate;
}
function setTimeToExit(uint _newExit) external onlyOwner {
MINIMUM_TIME_TO_EXIT = _newExit;
}
function setTaxPercentage(uint _newTax) external onlyOwner {
TAX_PERCENTAGE = _newTax;
}
function setMaxGameGold(uint _newMax) external onlyOwner {
MAXIMUM_GLOBAL_CLEO = _newMax;
}
function setCleo(address _cleo) external onlyOwner {
cleo = ICLEO(_cleo);
}
function getAccountCleop(address user) external view returns (cleoStake[] memory) {
return cleoStaked[user];
}
function getAccountCobras(address user) external view returns (cobraStake[] memory) {
return cobraStaked[user];
}
function addTokensToStake(address account, uint16[] calldata tokenIds) external {
require(account == msg.sender || msg.sender == address(cleop), "You do not have a permission to do that");
cleoHolders.push(account);
for (uint i = 0; i < tokenIds.length; i++) {
if (msg.sender != address(cleop)) {
// dont do this step if its a mint + stake
require(cleop.ownerOf(tokenIds[i]) == msg.sender, "This NTF does not belong to address");
cleop.transferFrom(msg.sender, address(this), tokenIds[i]);
} else if (tokenIds[i] == 0) {
continue; // there may be gaps in the array for stolen tokens
}
if (cleop.isCobra(tokenIds[i])) {
_stakeCobras(account, tokenIds[i]);
} else {
_stakeCleos(account, tokenIds[i]);
}
}
}
function _stakeCleos(address account, uint16 tokenId) internal whenNotPaused _updateEarnings {
totalCleosStaked += 1;
uint level=levels[tokenId];
uint stakeOwed = 0;
cleoIndices[tokenId] = cleoStaked[account].length;
cleoStaked[account].push(cleoStake({
owner: account,
tokenId: uint16(tokenId),
value: uint80(block.timestamp),
level: level,
stakeOwed: stakeOwed
}));
emit TokenStaked(account, tokenId, block.timestamp);
}
function _stakeCobras(address account, uint16 tokenId) internal {
totalCobrasStaked += 1;
uint stakeOwed = 0;
// If account already has some pirates no need to push it to the tracker
if (cobraStaked[account].length == 0) {
cobraHolders.push(account);
}
cobraIndices[tokenId] = cobraStaked[account].length;
cobraStaked[account].push(cobraStake({
owner: account,
tokenId: uint16(tokenId),
value: uint80(cobraReward),
stakeOwed: stakeOwed
}));
emit TokenStaked(account, tokenId, cobraReward);
}
function claimFromStake(uint16[] calldata tokenIds, bool unstake) external whenNotPaused _updateEarnings {
uint owed = 0;
for (uint i = 0; i < tokenIds.length; i++) {
if (!cleop.isCobra(tokenIds[i])) {
owed += _claimFromCleo(tokenIds[i], unstake);
} else {
owed += _claimFromCobra(tokenIds[i], unstake);
}
}
if (owed == 0) return;
cleo.mint(msg.sender, owed);
}
function _claimFromCleo(uint16 tokenId, bool unstake) internal returns (uint owed) {
cleoStake memory stake = cleoStaked[msg.sender][cleoIndices[tokenId]];
require(stake.owner == msg.sender, "This NTF does not belong to address");
require(!(unstake && block.timestamp - stake.value < MINIMUM_TIME_TO_EXIT), "Need to wait more time since last claim");
if (totalCleoEarned < MAXIMUM_GLOBAL_CLEO) {
owed = ((block.timestamp - stake.value) * stake.level * DAILY_CLEO_RATE) / 1 days;
owed += stake.stakeOwed;
} else if (stake.value > lastClaimTimestamp) {
owed = 0; // $GGOLD production stopped already
} else {
owed = ((lastClaimTimestamp - stake.value) * DAILY_CLEO_RATE) / 1 days; // stop earning additional $GGOLD if it's all been earned
}
if (unstake) {
if (getSomeRandomNumber(tokenId, 100) <= 50) {
_payTax(owed);
emit cleoCoinStolen(tokenId, owed);
owed = 0;
}
updateRandomIndex();
totalCleosStaked -= 1;
cleoStake memory lastStake = cleoStaked[msg.sender][cleoStaked[msg.sender].length - 1];
cleoStaked[msg.sender][cleoIndices[tokenId]] = lastStake;
cleoIndices[lastStake.tokenId] = cleoIndices[tokenId];
cleoStaked[msg.sender].pop();
delete cleoIndices[tokenId];
cleop.safeTransferFrom(address(this), msg.sender, tokenId, "");
} else {
_payTax((owed * TAX_PERCENTAGE) / 100); // Pay some $GGOLD to pirates!
owed = (owed * (100 - TAX_PERCENTAGE)) / 100;
uint80 timestamp = uint80(block.timestamp);
uint level=levels[tokenId];
cleoStaked[msg.sender][cleoIndices[tokenId]] = cleoStake({
owner: msg.sender,
tokenId: uint16(tokenId),
value: timestamp,
level: level,
stakeOwed: 0
}); // reset stake
}
emit cleoClaimed(tokenId, owed, unstake);
}
function _updateStake(address account, uint tokenIds) internal {
uint owed;
cleoStake memory stake = cleoStaked[account][cleoIndices[tokenIds]];
if (totalCleoEarned < MAXIMUM_GLOBAL_CLEO) {
owed = ((block.timestamp - stake.value) * stake.level * DAILY_CLEO_RATE) / 1 days;
owed += stake.stakeOwed;
} else if (stake.value > lastClaimTimestamp) {
owed = 0; // $GGOLD production stopped already
} else {
owed = ((lastClaimTimestamp - stake.value) * DAILY_CLEO_RATE) / 1 days; // stop earning additional $GGOLD if it's all been earned
}
uint80 timestamp = uint80(block.timestamp);
uint level = levels[tokenIds];
cleoStaked[account][cleoIndices[tokenIds]] = cleoStake({
owner: account,
tokenId: uint16(tokenIds),
value: timestamp,
level: level,
stakeOwed: owed
}); // update stake
}
function _addToMapping(uint tokenId) external {
require(msg.sender == address(cleop), "Can only be called by mint contract");
uint startingLevel=1;
levels[tokenId]=startingLevel;
}
function _updateMapping(uint tokenId, address account , bool stake) external onlyOwner {
uint currentLevel = levels[tokenId];
levels[tokenId]= currentLevel + 1;
if(stake == true){
_updateStake(account, tokenId);
}
}
function _claimFromCobra(uint16 tokenId, bool unstake) internal returns (uint owed) {
require(cleop.ownerOf(tokenId) == address(this), "This NTF does not belong to address");
cobraStake memory stake = cobraStaked[msg.sender][cobraIndices[tokenId]];
require(stake.owner == msg.sender, "This NTF does not belong to address");
owed = (cobraReward - stake.value);
if (unstake) {
totalCobrasStaked -= 1; // Remove Alpha from total staked
cobraStake memory lastStake = cobraStaked[msg.sender][cobraStaked[msg.sender].length - 1];
cobraStaked[msg.sender][cobraIndices[tokenId]] = lastStake;
cobraIndices[lastStake.tokenId] = cobraIndices[tokenId];
cobraStaked[msg.sender].pop();
delete cobraIndices[tokenId];
updateCobraOwnerAddressList(msg.sender);
cleop.safeTransferFrom(address(this), msg.sender, tokenId, "");
} else {
cobraStaked[msg.sender][cobraIndices[tokenId]] = cobraStake({
owner: msg.sender,
tokenId: uint16(tokenId),
value: uint80(cobraReward),
stakeOwed: 0
}); // reset stake
}
emit cobraClaimed(tokenId, owed, unstake);
}
function updateCobraOwnerAddressList(address account) internal {
if (cobraStaked[account].length != 0) {
return; // No need to update holders
}
// Update the address list of holders, account unstaked all pirates
address lastOwner = cobraHolders[cobraHolders.length - 1];
uint indexOfHolder = 0;
for (uint i = 0; i < cobraHolders.length; i++) {
if (cobraHolders[i] == account) {
indexOfHolder = i;
break;
}
}
cobraHolders[indexOfHolder] = lastOwner;
cobraHolders.pop();
}
function rescue(uint16[] calldata tokenIds) external {
require(rescueEnabled, "Rescue disabled");
uint16 tokenId;
for (uint16 i = 0; i < tokenIds.length; i++) {
tokenId = tokenIds[i];
if (!cleop.isCobra(tokenId)) {
cleoStake memory stake;
stake = cleoStaked[msg.sender][cleoIndices[tokenId]];
require(stake.owner == msg.sender, "This NTF does not belong to address");
totalCleosStaked -= 1;
cleoStake memory lastStake = cleoStaked[msg.sender][cleoStaked[msg.sender].length - 1];
cleoStaked[msg.sender][cleoIndices[tokenId]] = lastStake;
cleoIndices[lastStake.tokenId] = cleoIndices[tokenId];
cleoStaked[msg.sender].pop();
delete cleoIndices[tokenId];
cleop.safeTransferFrom(address(this), msg.sender, tokenId, "");
emit cleoClaimed(tokenId, 0, true);
} else {
cobraStake memory stake;
stake = cobraStaked[msg.sender][cobraIndices[tokenId]];
require(stake.owner == msg.sender, "This NTF does not belong to address");
totalCobrasStaked -= 1;
cobraStake memory lastStake = cobraStaked[msg.sender][cobraStaked[msg.sender].length - 1];
cobraStaked[msg.sender][cobraIndices[tokenId]] = lastStake;
cobraIndices[lastStake.tokenId] = cobraIndices[tokenId];
cobraStaked[msg.sender].pop();
delete cobraIndices[tokenId];
updateCobraOwnerAddressList(msg.sender);
cleop.safeTransferFrom(address(this), msg.sender, tokenId, "");
emit cobraClaimed(tokenId, 0, true);
}
}
}
function _payTax(uint _amount) internal {
if (totalCobrasStaked == 0) {
unaccountedRewards += _amount;
return;
}
cobraReward += (_amount + unaccountedRewards) / totalCobrasStaked;
unaccountedRewards = 0;
}
modifier _updateEarnings() {
if (totalCleoEarned < MAXIMUM_GLOBAL_CLEO) {
totalCleoEarned += (block.timestamp - lastClaimTimestamp) * DAILY_CLEO_RATE / 1 days;
lastClaimTimestamp = block.timestamp;
}
_;
}
function setRescueEnabled(bool _enabled) external onlyOwner {
rescueEnabled = _enabled;
}
function setPaused(bool _state) external onlyOwner {
_paused = _state;
}
function randomCobraOwner() external returns (address) {
if (totalCobrasStaked == 0) return address(0x0);
uint holderIndex = getSomeRandomNumber(totalCobrasStaked, cobraHolders.length);
updateRandomIndex();
return cobraHolders[holderIndex];
}
function updateRandomIndex() internal {
_randomIndex += 1;
_randomCalls += 1;
if (_randomIndex > 6) _randomIndex = 0;
}
function getSomeRandomNumber(uint _seed, uint _limit) internal view returns (uint16) {
uint extra = 0;
for (uint16 i = 0; i < 7; i++) {
extra += _randomSource[_randomIndex].balance;
}
uint random = uint(
keccak256(
abi.encodePacked(
_seed,
blockhash(block.number - 1),
block.coinbase,
block.difficulty,
msg.sender,
extra,
_randomCalls,
_randomIndex
)
)
);
return uint16(random % _limit);
}
function changeRandomSource(uint _id, address _address) external onlyOwner {
_randomSource[_id] = _address;
}
function shuffleSeeds(uint _seed, uint _max) external onlyOwner {
uint shuffleCount = getSomeRandomNumber(_seed, _max);
_randomIndex = uint16(shuffleCount);
for (uint i = 0; i < shuffleCount; i++) {
updateRandomIndex();
}
}
function onERC721Received(
address,
address from,
uint,
bytes calldata
) external pure override returns (bytes4) {
require(from == address(0x0), "Cannot send tokens to this contact directly");
return IERC721Receiver.onERC721Received.selector;
}
}