creation_sourcecode: {{
    "language": "Solidity",
    "sources": {
      "@openzeppelin/contracts/access/Ownable.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../utils/Context.sol\";\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract Ownable is Context {\n    address private _owner;\n\n    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n    /**\n     * @dev Initializes the contract setting the deployer as the initial owner.\n     */\n    constructor() {\n        _transferOwnership(_msgSender());\n    }\n\n    /**\n     * @dev Throws if called by any account other than the owner.\n     */\n    modifier onlyOwner() {\n        _checkOwner();\n        _;\n    }\n\n    /**\n     * @dev Returns the address of the current owner.\n     */\n    function owner() public view virtual returns (address) {\n        return _owner;\n    }\n\n    /**\n     * @dev Throws if the sender is not the owner.\n     */\n    function _checkOwner() internal view virtual {\n        require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n    }\n\n    /**\n     * @dev Leaves the contract without owner. It will not be possible to call\n     * `onlyOwner` functions. Can only be called by the current owner.\n     *\n     * NOTE: Renouncing ownership will leave the contract without an owner,\n     * thereby disabling any functionality that is only available to the owner.\n     */\n    function renounceOwnership() public virtual onlyOwner {\n        _transferOwnership(address(0));\n    }\n\n    /**\n     * @dev Transfers ownership of the contract to a new account (`newOwner`).\n     * Can only be called by the current owner.\n     */\n    function transferOwnership(address newOwner) public virtual onlyOwner {\n        require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n        _transferOwnership(newOwner);\n    }\n\n    /**\n     * @dev Transfers ownership of the contract to a new account (`newOwner`).\n     * Internal function without access restriction.\n     */\n    function _transferOwnership(address newOwner) internal virtual {\n        address oldOwner = _owner;\n        _owner = newOwner;\n        emit OwnershipTransferred(oldOwner, newOwner);\n    }\n}\n"
      },
      "@openzeppelin/contracts/interfaces/IERC20.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (interfaces/IERC20.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../token/ERC20/IERC20.sol\";\n"
      },
      "@openzeppelin/contracts/token/ERC20/ERC20.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/ERC20.sol)\n\npragma solidity ^0.8.0;\n\nimport \"./IERC20.sol\";\nimport \"./extensions/IERC20Metadata.sol\";\nimport \"../../utils/Context.sol\";\n\n/**\n * @dev Implementation of the {IERC20} interface.\n *\n * This implementation is agnostic to the way tokens are created. This means\n * that a supply mechanism has to be added in a derived contract using {_mint}.\n * For a generic mechanism see {ERC20PresetMinterPauser}.\n *\n * TIP: For a detailed writeup see our guide\n * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How\n * to implement supply mechanisms].\n *\n * The default value of {decimals} is 18. To change this, you should override\n * this function so it returns a different value.\n *\n * We have followed general OpenZeppelin Contracts guidelines: functions revert\n * instead returning `false` on failure. This behavior is nonetheless\n * conventional and does not conflict with the expectations of ERC20\n * applications.\n *\n * Additionally, an {Approval} event is emitted on calls to {transferFrom}.\n * This allows applications to reconstruct the allowance for all accounts just\n * by listening to said events. Other implementations of the EIP may not emit\n * these events, as it isn't required by the specification.\n *\n * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}\n * functions have been added to mitigate the well-known issues around setting\n * allowances. See {IERC20-approve}.\n */\ncontract ERC20 is Context, IERC20, IERC20Metadata {\n    mapping(address => uint256) private _balances;\n\n    mapping(address => mapping(address => uint256)) private _allowances;\n\n    uint256 private _totalSupply;\n\n    string private _name;\n    string private _symbol;\n\n    /**\n     * @dev Sets the values for {name} and {symbol}.\n     *\n     * All two of these values are immutable: they can only be set once during\n     * construction.\n     */\n    constructor(string memory name_, string memory symbol_) {\n        _name = name_;\n        _symbol = symbol_;\n    }\n\n    /**\n     * @dev Returns the name of the token.\n     */\n    function name() public view virtual override returns (string memory) {\n        return _name;\n    }\n\n    /**\n     * @dev Returns the symbol of the token, usually a shorter version of the\n     * name.\n     */\n    function symbol() public view virtual override returns (string memory) {\n        return _symbol;\n    }\n\n    /**\n     * @dev Returns the number of decimals used to get its user representation.\n     * For example, if `decimals` equals `2`, a balance of `505` tokens should\n     * be displayed to a user as `5.05` (`505 / 10 ** 2`).\n     *\n     * Tokens usually opt for a value of 18, imitating the relationship between\n     * Ether and Wei. This is the default value returned by this function, unless\n     * it's overridden.\n     *\n     * NOTE: This information is only used for _display_ purposes: it in\n     * no way affects any of the arithmetic of the contract, including\n     * {IERC20-balanceOf} and {IERC20-transfer}.\n     */\n    function decimals() public view virtual override returns (uint8) {\n        return 18;\n    }\n\n    /**\n     * @dev See {IERC20-totalSupply}.\n     */\n    function totalSupply() public view virtual override returns (uint256) {\n        return _totalSupply;\n    }\n\n    /**\n     * @dev See {IERC20-balanceOf}.\n     */\n    function balanceOf(address account) public view virtual override returns (uint256) {\n        return _balances[account];\n    }\n\n    /**\n     * @dev See {IERC20-transfer}.\n     *\n     * Requirements:\n     *\n     * - `to` cannot be the zero address.\n     * - the caller must have a balance of at least `amount`.\n     */\n    function transfer(address to, uint256 amount) public virtual override returns (bool) {\n        address owner = _msgSender();\n        _transfer(owner, to, amount);\n        return true;\n    }\n\n    /**\n     * @dev See {IERC20-allowance}.\n     */\n    function allowance(address owner, address spender) public view virtual override returns (uint256) {\n        return _allowances[owner][spender];\n    }\n\n    /**\n     * @dev See {IERC20-approve}.\n     *\n     * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on\n     * `transferFrom`. This is semantically equivalent to an infinite approval.\n     *\n     * Requirements:\n     *\n     * - `spender` cannot be the zero address.\n     */\n    function approve(address spender, uint256 amount) public virtual override returns (bool) {\n        address owner = _msgSender();\n        _approve(owner, spender, amount);\n        return true;\n    }\n\n    /**\n     * @dev See {IERC20-transferFrom}.\n     *\n     * Emits an {Approval} event indicating the updated allowance. This is not\n     * required by the EIP. See the note at the beginning of {ERC20}.\n     *\n     * NOTE: Does not update the allowance if the current allowance\n     * is the maximum `uint256`.\n     *\n     * Requirements:\n     *\n     * - `from` and `to` cannot be the zero address.\n     * - `from` must have a balance of at least `amount`.\n     * - the caller must have allowance for ``from``'s tokens of at least\n     * `amount`.\n     */\n    function transferFrom(address from, address to, uint256 amount) public virtual override returns (bool) {\n        address spender = _msgSender();\n        _spendAllowance(from, spender, amount);\n        _transfer(from, to, amount);\n        return true;\n    }\n\n    /**\n     * @dev Atomically increases the allowance granted to `spender` by the caller.\n     *\n     * This is an alternative to {approve} that can be used as a mitigation for\n     * problems described in {IERC20-approve}.\n     *\n     * Emits an {Approval} event indicating the updated allowance.\n     *\n     * Requirements:\n     *\n     * - `spender` cannot be the zero address.\n     */\n    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {\n        address owner = _msgSender();\n        _approve(owner, spender, allowance(owner, spender) + addedValue);\n        return true;\n    }\n\n    /**\n     * @dev Atomically decreases the allowance granted to `spender` by the caller.\n     *\n     * This is an alternative to {approve} that can be used as a mitigation for\n     * problems described in {IERC20-approve}.\n     *\n     * Emits an {Approval} event indicating the updated allowance.\n     *\n     * Requirements:\n     *\n     * - `spender` cannot be the zero address.\n     * - `spender` must have allowance for the caller of at least\n     * `subtractedValue`.\n     */\n    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {\n        address owner = _msgSender();\n        uint256 currentAllowance = allowance(owner, spender);\n        require(currentAllowance >= subtractedValue, \"ERC20: decreased allowance below zero\");\n        unchecked {\n            _approve(owner, spender, currentAllowance - subtractedValue);\n        }\n\n        return true;\n    }\n\n    /**\n     * @dev Moves `amount` of tokens from `from` to `to`.\n     *\n     * This internal function is equivalent to {transfer}, and can be used to\n     * e.g. implement automatic token fees, slashing mechanisms, etc.\n     *\n     * Emits a {Transfer} event.\n     *\n     * Requirements:\n     *\n     * - `from` cannot be the zero address.\n     * - `to` cannot be the zero address.\n     * - `from` must have a balance of at least `amount`.\n     */\n    function _transfer(address from, address to, uint256 amount) internal virtual {\n        require(from != address(0), \"ERC20: transfer from the zero address\");\n        require(to != address(0), \"ERC20: transfer to the zero address\");\n\n        _beforeTokenTransfer(from, to, amount);\n\n        uint256 fromBalance = _balances[from];\n        require(fromBalance >= amount, \"ERC20: transfer amount exceeds balance\");\n        unchecked {\n            _balances[from] = fromBalance - amount;\n            // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by\n            // decrementing then incrementing.\n            _balances[to] += amount;\n        }\n\n        emit Transfer(from, to, amount);\n\n        _afterTokenTransfer(from, to, amount);\n    }\n\n    /** @dev Creates `amount` tokens and assigns them to `account`, increasing\n     * the total supply.\n     *\n     * Emits a {Transfer} event with `from` set to the zero address.\n     *\n     * Requirements:\n     *\n     * - `account` cannot be the zero address.\n     */\n    function _mint(address account, uint256 amount) internal virtual {\n        require(account != address(0), \"ERC20: mint to the zero address\");\n\n        _beforeTokenTransfer(address(0), account, amount);\n\n        _totalSupply += amount;\n        unchecked {\n            // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above.\n            _balances[account] += amount;\n        }\n        emit Transfer(address(0), account, amount);\n\n        _afterTokenTransfer(address(0), account, amount);\n    }\n\n    /**\n     * @dev Destroys `amount` tokens from `account`, reducing the\n     * total supply.\n     *\n     * Emits a {Transfer} event with `to` set to the zero address.\n     *\n     * Requirements:\n     *\n     * - `account` cannot be the zero address.\n     * - `account` must have at least `amount` tokens.\n     */\n    function _burn(address account, uint256 amount) internal virtual {\n        require(account != address(0), \"ERC20: burn from the zero address\");\n\n        _beforeTokenTransfer(account, address(0), amount);\n\n        uint256 accountBalance = _balances[account];\n        require(accountBalance >= amount, \"ERC20: burn amount exceeds balance\");\n        unchecked {\n            _balances[account] = accountBalance - amount;\n            // Overflow not possible: amount <= accountBalance <= totalSupply.\n            _totalSupply -= amount;\n        }\n\n        emit Transfer(account, address(0), amount);\n\n        _afterTokenTransfer(account, address(0), amount);\n    }\n\n    /**\n     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.\n     *\n     * This internal function is equivalent to `approve`, and can be used to\n     * e.g. set automatic allowances for certain subsystems, etc.\n     *\n     * Emits an {Approval} event.\n     *\n     * Requirements:\n     *\n     * - `owner` cannot be the zero address.\n     * - `spender` cannot be the zero address.\n     */\n    function _approve(address owner, address spender, uint256 amount) internal virtual {\n        require(owner != address(0), \"ERC20: approve from the zero address\");\n        require(spender != address(0), \"ERC20: approve to the zero address\");\n\n        _allowances[owner][spender] = amount;\n        emit Approval(owner, spender, amount);\n    }\n\n    /**\n     * @dev Updates `owner` s allowance for `spender` based on spent `amount`.\n     *\n     * Does not update the allowance amount in case of infinite allowance.\n     * Revert if not enough allowance is available.\n     *\n     * Might emit an {Approval} event.\n     */\n    function _spendAllowance(address owner, address spender, uint256 amount) internal virtual {\n        uint256 currentAllowance = allowance(owner, spender);\n        if (currentAllowance != type(uint256).max) {\n            require(currentAllowance >= amount, \"ERC20: insufficient allowance\");\n            unchecked {\n                _approve(owner, spender, currentAllowance - amount);\n            }\n        }\n    }\n\n    /**\n     * @dev Hook that is called before any transfer of tokens. This includes\n     * minting and burning.\n     *\n     * Calling conditions:\n     *\n     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens\n     * will be transferred to `to`.\n     * - when `from` is zero, `amount` tokens will be minted for `to`.\n     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.\n     * - `from` and `to` are never both zero.\n     *\n     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].\n     */\n    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual {}\n\n    /**\n     * @dev Hook that is called after any transfer of tokens. This includes\n     * minting and burning.\n     *\n     * Calling conditions:\n     *\n     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens\n     * has been transferred to `to`.\n     * - when `from` is zero, `amount` tokens have been minted for `to`.\n     * - when `to` is zero, `amount` of ``from``'s tokens have been burned.\n     * - `from` and `to` are never both zero.\n     *\n     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].\n     */\n    function _afterTokenTransfer(address from, address to, uint256 amount) internal virtual {}\n}\n"
      },
      "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../IERC20.sol\";\n\n/**\n * @dev Interface for the optional metadata functions from the ERC20 standard.\n *\n * _Available since v4.1._\n */\ninterface IERC20Metadata is IERC20 {\n    /**\n     * @dev Returns the name of the token.\n     */\n    function name() external view returns (string memory);\n\n    /**\n     * @dev Returns the symbol of the token.\n     */\n    function symbol() external view returns (string memory);\n\n    /**\n     * @dev Returns the decimals places of the token.\n     */\n    function decimals() external view returns (uint8);\n}\n"
      },
      "@openzeppelin/contracts/token/ERC20/extensions/IERC20Permit.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.4) (token/ERC20/extensions/IERC20Permit.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in\n * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].\n *\n * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by\n * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't\n * need to send a transaction, and thus is not required to hold Ether at all.\n *\n * ==== Security Considerations\n *\n * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature\n * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be\n * considered as an intention to spend the allowance in any specific way. The second is that because permits have\n * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should\n * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be\n * generally recommended is:\n *\n * ```solidity\n * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {\n *     try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}\n *     doThing(..., value);\n * }\n *\n * function doThing(..., uint256 value) public {\n *     token.safeTransferFrom(msg.sender, address(this), value);\n *     ...\n * }\n * ```\n *\n * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of\n * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also\n * {SafeERC20-safeTransferFrom}).\n *\n * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so\n * contracts should have entry points that don't rely on permit.\n */\ninterface IERC20Permit {\n    /**\n     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,\n     * given ``owner``'s signed approval.\n     *\n     * IMPORTANT: The same issues {IERC20-approve} has related to transaction\n     * ordering also apply here.\n     *\n     * Emits an {Approval} event.\n     *\n     * Requirements:\n     *\n     * - `spender` cannot be the zero address.\n     * - `deadline` must be a timestamp in the future.\n     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`\n     * over the EIP712-formatted function arguments.\n     * - the signature must use ``owner``'s current nonce (see {nonces}).\n     *\n     * For more information on the signature format, see the\n     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP\n     * section].\n     *\n     * CAUTION: See Security Considerations above.\n     */\n    function permit(\n        address owner,\n        address spender,\n        uint256 value,\n        uint256 deadline,\n        uint8 v,\n        bytes32 r,\n        bytes32 s\n    ) external;\n\n    /**\n     * @dev Returns the current nonce for `owner`. This value must be\n     * included whenever a signature is generated for {permit}.\n     *\n     * Every successful call to {permit} increases ``owner``'s nonce by one. This\n     * prevents a signature from being used multiple times.\n     */\n    function nonces(address owner) external view returns (uint256);\n\n    /**\n     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.\n     */\n    // solhint-disable-next-line func-name-mixedcase\n    function DOMAIN_SEPARATOR() external view returns (bytes32);\n}\n"
      },
      "@openzeppelin/contracts/token/ERC20/IERC20.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC20 standard as defined in the EIP.\n */\ninterface IERC20 {\n    /**\n     * @dev Emitted when `value` tokens are moved from one account (`from`) to\n     * another (`to`).\n     *\n     * Note that `value` may be zero.\n     */\n    event Transfer(address indexed from, address indexed to, uint256 value);\n\n    /**\n     * @dev Emitted when the allowance of a `spender` for an `owner` is set by\n     * a call to {approve}. `value` is the new allowance.\n     */\n    event Approval(address indexed owner, address indexed spender, uint256 value);\n\n    /**\n     * @dev Returns the amount of tokens in existence.\n     */\n    function totalSupply() external view returns (uint256);\n\n    /**\n     * @dev Returns the amount of tokens owned by `account`.\n     */\n    function balanceOf(address account) external view returns (uint256);\n\n    /**\n     * @dev Moves `amount` tokens from the caller's account to `to`.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transfer(address to, uint256 amount) external returns (bool);\n\n    /**\n     * @dev Returns the remaining number of tokens that `spender` will be\n     * allowed to spend on behalf of `owner` through {transferFrom}. This is\n     * zero by default.\n     *\n     * This value changes when {approve} or {transferFrom} are called.\n     */\n    function allowance(address owner, address spender) external view returns (uint256);\n\n    /**\n     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * IMPORTANT: Beware that changing an allowance with this method brings the risk\n     * that someone may use both the old and the new allowance by unfortunate\n     * transaction ordering. One possible solution to mitigate this race\n     * condition is to first reduce the spender's allowance to 0 and set the\n     * desired value afterwards:\n     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\n     *\n     * Emits an {Approval} event.\n     */\n    function approve(address spender, uint256 amount) external returns (bool);\n\n    /**\n     * @dev Moves `amount` tokens from `from` to `to` using the\n     * allowance mechanism. `amount` is then deducted from the caller's\n     * allowance.\n     *\n     * Returns a boolean value indicating whether the operation succeeded.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transferFrom(address from, address to, uint256 amount) external returns (bool);\n}\n"
      },
      "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../IERC20.sol\";\nimport \"../extensions/IERC20Permit.sol\";\nimport \"../../../utils/Address.sol\";\n\n/**\n * @title SafeERC20\n * @dev Wrappers around ERC20 operations that throw on failure (when the token\n * contract returns false). Tokens that return no value (and instead revert or\n * throw on failure) are also supported, non-reverting calls are assumed to be\n * successful.\n * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,\n * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.\n */\nlibrary SafeERC20 {\n    using Address for address;\n\n    /**\n     * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,\n     * non-reverting calls are assumed to be successful.\n     */\n    function safeTransfer(IERC20 token, address to, uint256 value) internal {\n        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));\n    }\n\n    /**\n     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the\n     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.\n     */\n    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {\n        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));\n    }\n\n    /**\n     * @dev Deprecated. This function has issues similar to the ones found in\n     * {IERC20-approve}, and its usage is discouraged.\n     *\n     * Whenever possible, use {safeIncreaseAllowance} and\n     * {safeDecreaseAllowance} instead.\n     */\n    function safeApprove(IERC20 token, address spender, uint256 value) internal {\n        // safeApprove should only be called when setting an initial allowance,\n        // or when resetting it to zero. To increase and decrease it, use\n        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'\n        require(\n            (value == 0) || (token.allowance(address(this), spender) == 0),\n            \"SafeERC20: approve from non-zero to non-zero allowance\"\n        );\n        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));\n    }\n\n    /**\n     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,\n     * non-reverting calls are assumed to be successful.\n     */\n    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {\n        uint256 oldAllowance = token.allowance(address(this), spender);\n        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));\n    }\n\n    /**\n     * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,\n     * non-reverting calls are assumed to be successful.\n     */\n    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {\n        unchecked {\n            uint256 oldAllowance = token.allowance(address(this), spender);\n            require(oldAllowance >= value, \"SafeERC20: decreased allowance below zero\");\n            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));\n        }\n    }\n\n    /**\n     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,\n     * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval\n     * to be set to zero before setting it to a non-zero value, such as USDT.\n     */\n    function forceApprove(IERC20 token, address spender, uint256 value) internal {\n        bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);\n\n        if (!_callOptionalReturnBool(token, approvalCall)) {\n            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));\n            _callOptionalReturn(token, approvalCall);\n        }\n    }\n\n    /**\n     * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.\n     * Revert on invalid signature.\n     */\n    function safePermit(\n        IERC20Permit token,\n        address owner,\n        address spender,\n        uint256 value,\n        uint256 deadline,\n        uint8 v,\n        bytes32 r,\n        bytes32 s\n    ) internal {\n        uint256 nonceBefore = token.nonces(owner);\n        token.permit(owner, spender, value, deadline, v, r, s);\n        uint256 nonceAfter = token.nonces(owner);\n        require(nonceAfter == nonceBefore + 1, \"SafeERC20: permit did not succeed\");\n    }\n\n    /**\n     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement\n     * on the return value: the return value is optional (but if data is returned, it must not be false).\n     * @param token The token targeted by the call.\n     * @param data The call data (encoded using abi.encode or one of its variants).\n     */\n    function _callOptionalReturn(IERC20 token, bytes memory data) private {\n        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since\n        // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that\n        // the target address contains contract code and also asserts for success in the low-level call.\n\n        bytes memory returndata = address(token).functionCall(data, \"SafeERC20: low-level call failed\");\n        require(returndata.length == 0 || abi.decode(returndata, (bool)), \"SafeERC20: ERC20 operation did not succeed\");\n    }\n\n    /**\n     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement\n     * on the return value: the return value is optional (but if data is returned, it must not be false).\n     * @param token The token targeted by the call.\n     * @param data The call data (encoded using abi.encode or one of its variants).\n     *\n     * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.\n     */\n    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {\n        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since\n        // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false\n        // and not revert is the subcall reverts.\n\n        (bool success, bytes memory returndata) = address(token).call(data);\n        return\n            success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token));\n    }\n}\n"
      },
      "@openzeppelin/contracts/utils/Address.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)\n\npragma solidity ^0.8.1;\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary Address {\n    /**\n     * @dev Returns true if `account` is a contract.\n     *\n     * [IMPORTANT]\n     * ====\n     * It is unsafe to assume that an address for which this function returns\n     * false is an externally-owned account (EOA) and not a contract.\n     *\n     * Among others, `isContract` will return false for the following\n     * types of addresses:\n     *\n     *  - an externally-owned account\n     *  - a contract in construction\n     *  - an address where a contract will be created\n     *  - an address where a contract lived, but was destroyed\n     *\n     * Furthermore, `isContract` will also return true if the target contract within\n     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,\n     * which only has an effect at the end of a transaction.\n     * ====\n     *\n     * [IMPORTANT]\n     * ====\n     * You shouldn't rely on `isContract` to protect against flash loan attacks!\n     *\n     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n     * constructor.\n     * ====\n     */\n    function isContract(address account) internal view returns (bool) {\n        // This method relies on extcodesize/address.code.length, which returns 0\n        // for contracts in construction, since the code is only stored at the end\n        // of the constructor execution.\n\n        return account.code.length > 0;\n    }\n\n    /**\n     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n     * `recipient`, forwarding all available gas and reverting on errors.\n     *\n     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n     * of certain opcodes, possibly making contracts go over the 2300 gas limit\n     * imposed by `transfer`, making them unable to receive funds via\n     * `transfer`. {sendValue} removes this limitation.\n     *\n     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n     *\n     * IMPORTANT: because control is transferred to `recipient`, care must be\n     * taken to not create reentrancy vulnerabilities. Consider using\n     * {ReentrancyGuard} or the\n     * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n     */\n    function sendValue(address payable recipient, uint256 amount) internal {\n        require(address(this).balance >= amount, \"Address: insufficient balance\");\n\n        (bool success, ) = recipient.call{value: amount}(\"\");\n        require(success, \"Address: unable to send value, recipient may have reverted\");\n    }\n\n    /**\n     * @dev Performs a Solidity function call using a low level `call`. A\n     * plain `call` is an unsafe replacement for a function call: use this\n     * function instead.\n     *\n     * If `target` reverts with a revert reason, it is bubbled up by this\n     * function (like regular Solidity function calls).\n     *\n     * Returns the raw returned data. To convert to the expected return value,\n     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n     *\n     * Requirements:\n     *\n     * - `target` must be a contract.\n     * - calling `target` with `data` must not revert.\n     *\n     * _Available since v3.1._\n     */\n    function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n        return functionCallWithValue(target, data, 0, \"Address: low-level call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n     * `errorMessage` as a fallback revert reason when `target` reverts.\n     *\n     * _Available since v3.1._\n     */\n    function functionCall(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        return functionCallWithValue(target, data, 0, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but also transferring `value` wei to `target`.\n     *\n     * Requirements:\n     *\n     * - the calling contract must have an ETH balance of at least `value`.\n     * - the called Solidity function must be `payable`.\n     *\n     * _Available since v3.1._\n     */\n    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {\n        return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n     * with `errorMessage` as a fallback revert reason when `target` reverts.\n     *\n     * _Available since v3.1._\n     */\n    function functionCallWithValue(\n        address target,\n        bytes memory data,\n        uint256 value,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        require(address(this).balance >= value, \"Address: insufficient balance for call\");\n        (bool success, bytes memory returndata) = target.call{value: value}(data);\n        return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but performing a static call.\n     *\n     * _Available since v3.3._\n     */\n    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n        return functionStaticCall(target, data, \"Address: low-level static call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n     * but performing a static call.\n     *\n     * _Available since v3.3._\n     */\n    function functionStaticCall(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal view returns (bytes memory) {\n        (bool success, bytes memory returndata) = target.staticcall(data);\n        return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n     * but performing a delegate call.\n     *\n     * _Available since v3.4._\n     */\n    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n        return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n    }\n\n    /**\n     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n     * but performing a delegate call.\n     *\n     * _Available since v3.4._\n     */\n    function functionDelegateCall(\n        address target,\n        bytes memory data,\n        string memory errorMessage\n    ) internal returns (bytes memory) {\n        (bool success, bytes memory returndata) = target.delegatecall(data);\n        return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n    }\n\n    /**\n     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling\n     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.\n     *\n     * _Available since v4.8._\n     */\n    function verifyCallResultFromTarget(\n        address target,\n        bool success,\n        bytes memory returndata,\n        string memory errorMessage\n    ) internal view returns (bytes memory) {\n        if (success) {\n            if (returndata.length == 0) {\n                // only check isContract if the call was successful and the return data is empty\n                // otherwise we already know that it was a contract\n                require(isContract(target), \"Address: call to non-contract\");\n            }\n            return returndata;\n        } else {\n            _revert(returndata, errorMessage);\n        }\n    }\n\n    /**\n     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the\n     * revert reason or using the provided one.\n     *\n     * _Available since v4.3._\n     */\n    function verifyCallResult(\n        bool success,\n        bytes memory returndata,\n        string memory errorMessage\n    ) internal pure returns (bytes memory) {\n        if (success) {\n            return returndata;\n        } else {\n            _revert(returndata, errorMessage);\n        }\n    }\n\n    function _revert(bytes memory returndata, string memory errorMessage) private pure {\n        // Look for revert reason and bubble it up if present\n        if (returndata.length > 0) {\n            // The easiest way to bubble the revert reason is using memory via assembly\n            /// @solidity memory-safe-assembly\n            assembly {\n                let returndata_size := mload(returndata)\n                revert(add(32, returndata), returndata_size)\n            }\n        } else {\n            revert(errorMessage);\n        }\n    }\n}\n"
      },
      "@openzeppelin/contracts/utils/Context.sol": {
        "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.4) (utils/Context.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract Context {\n    function _msgSender() internal view virtual returns (address) {\n        return msg.sender;\n    }\n\n    function _msgData() internal view virtual returns (bytes calldata) {\n        return msg.data;\n    }\n\n    function _contextSuffixLength() internal view virtual returns (uint256) {\n        return 0;\n    }\n}\n"
      },
      "contracts/DistributionManager.sol": {
        "content": "// SPDX-License-Identifier: Unlicense\r\npragma solidity ^0.8.0;\r\n\r\ncontract DistributionManager {\r\n    struct AssetData {\r\n        uint128 emissionPerSecond;\r\n        uint128 lastUpdateTimestamp;\r\n        uint256 index;\r\n        mapping(address => uint256) users;\r\n    }\r\n\r\n    struct AssetConfigInput {\r\n        uint128 emissionPerSecond;\r\n        uint256 totalStaked;\r\n    }\r\n\r\n    struct UserStakeInput {\r\n        uint256 stakedByUser;\r\n        uint256 totalStaked;\r\n    }\r\n\r\n    uint256 public distributionEnd;\r\n\r\n    uint8 public constant PRECISION = 18;\r\n\r\n    AssetData public assetData;\r\n\r\n    /*\r\n    ╔══════════════════════════════╗\r\n    \r\n    ║            EVENTS            ║\r\n    \r\n    ╚══════════════════════════════╝\r\n  */\r\n\r\n    event AssetConfigUpdated(uint128 emission);\r\n    event AssetIndexUpdated(uint256 index);\r\n    event UserIndexUpdated(address indexed user, uint256 index);\r\n\r\n    function getUserAssetData(address _user) external view returns (uint256) {\r\n        return assetData.users[_user];\r\n    }\r\n\r\n    function _configureAsset(\r\n        AssetConfigInput memory _assetConfigInput\r\n    ) internal {\r\n        AssetData storage assetConfig = assetData;\r\n\r\n        _updateAssetStateInternal(assetConfig, _assetConfigInput.totalStaked);\r\n\r\n        assetConfig.emissionPerSecond = _assetConfigInput.emissionPerSecond;\r\n\r\n        emit AssetConfigUpdated(_assetConfigInput.emissionPerSecond);\r\n    }\r\n\r\n    function _updateAssetStateInternal(\r\n        AssetData storage _assetConfig,\r\n        uint256 _totalStaked\r\n    ) internal returns (uint256) {\r\n        uint256 oldIndex = _assetConfig.index;\r\n        uint128 lastUpdateTimestamp = _assetConfig.lastUpdateTimestamp;\r\n\r\n        if (block.timestamp == lastUpdateTimestamp) {\r\n            return oldIndex;\r\n        }\r\n\r\n        uint256 newIndex = _getAssetIndex(\r\n            oldIndex,\r\n            _assetConfig.emissionPerSecond,\r\n            lastUpdateTimestamp,\r\n            _totalStaked\r\n        );\r\n\r\n        if (newIndex != oldIndex) {\r\n            _assetConfig.index = newIndex;\r\n            emit AssetIndexUpdated(newIndex);\r\n        }\r\n\r\n        _assetConfig.lastUpdateTimestamp = uint128(block.timestamp);\r\n\r\n        return newIndex;\r\n    }\r\n\r\n    function _updateUserAssetInternal(\r\n        address _user,\r\n        uint256 _stakedByUser,\r\n        uint256 _totalStaked\r\n    ) internal returns (uint256) {\r\n        uint256 userIndex = assetData.users[_user];\r\n        uint256 accruedRewards = 0;\r\n\r\n        uint256 newIndex = _updateAssetStateInternal(assetData, _totalStaked);\r\n\r\n        if (userIndex != newIndex) {\r\n            if (_stakedByUser != 0) {\r\n                accruedRewards = _getRewards(\r\n                    _stakedByUser,\r\n                    newIndex,\r\n                    userIndex\r\n                );\r\n            }\r\n\r\n            assetData.users[_user] = newIndex;\r\n            emit UserIndexUpdated(_user, newIndex);\r\n        }\r\n\r\n        return accruedRewards;\r\n    }\r\n\r\n    function _claimRewards(\r\n        address _user,\r\n        UserStakeInput memory _stakes\r\n    ) internal returns (uint256) {\r\n        uint256 accruedRewards = 0;\r\n\r\n        accruedRewards =\r\n            accruedRewards +\r\n            _updateUserAssetInternal(\r\n                _user,\r\n                _stakes.stakedByUser,\r\n                _stakes.totalStaked\r\n            );\r\n\r\n        return accruedRewards;\r\n    }\r\n\r\n    function _getUnclaimedRewards(\r\n        address _user,\r\n        UserStakeInput memory _stakes\r\n    ) internal view returns (uint256) {\r\n        uint256 accruedRewards = 0;\r\n\r\n        AssetData storage assetConfig = assetData;\r\n\r\n        uint256 assetIndex = _getAssetIndex(\r\n            assetConfig.index,\r\n            assetConfig.emissionPerSecond,\r\n            assetConfig.lastUpdateTimestamp,\r\n            _stakes.totalStaked\r\n        );\r\n\r\n        accruedRewards =\r\n            accruedRewards +\r\n            _getRewards(\r\n                _stakes.stakedByUser,\r\n                assetIndex,\r\n                assetConfig.users[_user]\r\n            );\r\n\r\n        return accruedRewards;\r\n    }\r\n\r\n    function _getRewards(\r\n        uint256 _principalUserBalance,\r\n        uint256 _reserveIndex,\r\n        uint256 _userIndex\r\n    ) internal pure returns (uint256) {\r\n        return\r\n            (_principalUserBalance * (_reserveIndex - _userIndex)) /\r\n            (10 ** uint256(PRECISION));\r\n    }\r\n\r\n    function _getAssetIndex(\r\n        uint256 currentIndex,\r\n        uint256 emissionPerSecond,\r\n        uint256 lastUpdateTimestamp,\r\n        uint256 totalBalance\r\n    ) internal view returns (uint256) {\r\n        if (\r\n            emissionPerSecond == 0 ||\r\n            totalBalance == 0 ||\r\n            lastUpdateTimestamp == block.timestamp ||\r\n            lastUpdateTimestamp >= distributionEnd\r\n        ) {\r\n            return currentIndex;\r\n        }\r\n\r\n        uint256 currentTimestamp = block.timestamp > distributionEnd\r\n            ? distributionEnd\r\n            : block.timestamp;\r\n        uint256 timeDelta = currentTimestamp - lastUpdateTimestamp;\r\n        return\r\n            (emissionPerSecond * (timeDelta) * (10 ** uint256(PRECISION))) /\r\n            (totalBalance) +\r\n            (currentIndex);\r\n    }\r\n}\r\n"
      },
      "contracts/StakingGraphitect.sol": {
        "content": "// SPDX-License-Identifier: Unlicense\r\npragma solidity ^0.8.0;\r\n\r\nimport {DistributionManager} from \"./DistributionManager.sol\";\r\nimport \"@openzeppelin/contracts/access/Ownable.sol\";\r\nimport \"@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol\";\r\nimport \"@openzeppelin/contracts/interfaces/IERC20.sol\";\r\nimport \"@openzeppelin/contracts/token/ERC20/ERC20.sol\";\r\n\r\ncontract StakingGraphitect is ERC20, Ownable, DistributionManager {\r\n    using SafeERC20 for IERC20;\r\n\r\n    address constant DEAD_WALLET = 0x000000000000000000000000000000000000dEaD;\r\n\r\n    uint256 public penaltyRate;\r\n    uint256 public maxPerWallet;\r\n    uint256 public maxStakingPool;\r\n\r\n    IERC20 public rewardToken;\r\n    IERC20 public stakeToken;\r\n    mapping(address => uint256) public stakerRewardsToClaim;\r\n    mapping(address => uint256) public unstakingTimes;\r\n\r\n    event Stake(address indexed user, uint256 amount);\r\n    event Redeem(address indexed user, uint256 amount);\r\n    event RewardsAccrued(address indexed user, uint256 amount);\r\n    event RewardsClaimed(address indexed user, uint256 amount);\r\n\r\n    struct Share {\r\n        uint initialDeposit;\r\n        uint index;\r\n    }\r\n\r\n    address public updateAddress;\r\n    uint256 public totalDistributed;\r\n    uint256 public totalSnapshotReward;\r\n    uint256 public index;\r\n\r\n    mapping(address => Share) public shares;\r\n\r\n    mapping(address => uint256) public cachedReward;\r\n\r\n    constructor(\r\n        IERC20 _stakeToken,\r\n        IERC20 _rewardToken\r\n    ) ERC20(\"Staking Graphitect Token\", \"stGPT\") {\r\n        require(address(_stakeToken) != address(0), \"INVALID ADDRESS\");\r\n        require(address(_rewardToken) != address(0), \"INVALID ADDRESS\");\r\n\r\n        rewardToken = _rewardToken;\r\n        stakeToken = _stakeToken;\r\n        penaltyRate = 25; // 25%\r\n\r\n        updateAddress = msg.sender;\r\n\r\n        AssetConfigInput memory assetConfigInput = AssetConfigInput({\r\n            emissionPerSecond: 95129375951 * 10 ** 6, // 3,000,000 GPT for 365 days\r\n            totalStaked: totalSupply()\r\n        });\r\n        _configureAsset(assetConfigInput);\r\n\r\n        distributionEnd = block.timestamp + 365 days;\r\n    }\r\n\r\n    function setRewardToken(IERC20 _rewardToken) external onlyOwner {\r\n        require(address(_rewardToken) != address(0), \"INVALID ADDRESS\");\r\n        rewardToken = _rewardToken;\r\n    }\r\n\r\n    function setPenaltyRate(uint256 _penaltyRate) external onlyOwner {\r\n        penaltyRate = _penaltyRate;\r\n    }\r\n\r\n    function setStakeToken(IERC20 _stakeToken) external onlyOwner {\r\n        require(address(_stakeToken) != address(0), \"INVALID ADDRESS\");\r\n        stakeToken = _stakeToken;\r\n    }\r\n\r\n    function setDistributionEnd(uint256 _distributionEnd) external onlyOwner {\r\n        distributionEnd = _distributionEnd;\r\n    }\r\n\r\n    function configureAsset(\r\n        uint128 _InputEmissionPerSecond\r\n    ) external onlyOwner {\r\n        AssetConfigInput memory assetConfigInput = AssetConfigInput({\r\n            emissionPerSecond: _InputEmissionPerSecond,\r\n            totalStaked: totalSupply()\r\n        });\r\n        _configureAsset(assetConfigInput);\r\n    }\r\n\r\n    function transferAllRewardToken(\r\n        address _tokenAddress,\r\n        address _receiver\r\n    ) external onlyOwner {\r\n        rewardToken.safeTransfer(\r\n            _receiver,\r\n            IERC20(_tokenAddress).balanceOf(address(this))\r\n        );\r\n    }\r\n\r\n    function stake(uint256 amount) external {\r\n        require(amount != 0, \"INVALID_ZERO_AMOUNT\");\r\n        address staker = _msgSender();\r\n        Share memory share = shares[staker];\r\n\r\n        uint256 stakingTime = unstakingTimes[staker];\r\n        if (stakingTime == 0) {\r\n            unstakingTimes[staker] = block.timestamp + 28 days;\r\n        }\r\n\r\n        uint256 balanceOfUser = balanceOf(staker);\r\n\r\n        uint256 accruedRewards = _updateUserAssetInternal(\r\n            staker,\r\n            balanceOfUser,\r\n            totalSupply()\r\n        );\r\n        if (accruedRewards != 0) {\r\n            emit RewardsAccrued(staker, accruedRewards);\r\n            stakerRewardsToClaim[staker] =\r\n                stakerRewardsToClaim[staker] +\r\n                accruedRewards;\r\n        }\r\n\r\n        _updateGainAndShare(staker, share, share.initialDeposit + amount);\r\n        _mint(staker, amount);\r\n\r\n        stakeToken.safeTransferFrom(staker, address(this), amount);\r\n\r\n        emit Stake(staker, amount);\r\n    }\r\n\r\n    function redeem(uint256 amount) external {\r\n        require(amount != 0, \"INVALID_ZERO_AMOUNT\");\r\n        address redeemer = _msgSender();\r\n        Share memory share = shares[redeemer];\r\n\r\n        uint256 balanceOfRedeemer = balanceOf(redeemer);\r\n\r\n        uint256 amountToRedeem = (amount > balanceOfRedeemer)\r\n            ? balanceOfRedeemer\r\n            : amount;\r\n\r\n        _updateCurrentUnclaimedRewards(redeemer, balanceOfRedeemer, true);\r\n\r\n        _updateGainAndShare(\r\n            _msgSender(),\r\n            share,\r\n            share.initialDeposit - amountToRedeem\r\n        );\r\n        _burn(redeemer, amountToRedeem);\r\n\r\n        if (block.timestamp < unstakingTimes[redeemer]) {\r\n            uint256 burnAmount = (amountToRedeem * penaltyRate) / 100;\r\n            amountToRedeem = amountToRedeem - burnAmount;\r\n            stakeToken.safeTransfer(DEAD_WALLET, burnAmount);\r\n        }\r\n\r\n        stakeToken.safeTransfer(redeemer, amountToRedeem);\r\n\r\n        emit Redeem(msg.sender, amountToRedeem);\r\n    }\r\n\r\n    function claimRewards(uint256 amount) external {\r\n        address claimer = _msgSender();\r\n        uint256 newTotalRewards = _updateCurrentUnclaimedRewards(\r\n            claimer,\r\n            balanceOf(claimer),\r\n            false\r\n        );\r\n        uint256 amountToClaim = (amount == type(uint256).max)\r\n            ? newTotalRewards\r\n            : amount;\r\n\r\n        stakerRewardsToClaim[claimer] = newTotalRewards - amountToClaim;\r\n\r\n        rewardToken.safeTransfer(claimer, amountToClaim);\r\n\r\n        emit RewardsClaimed(claimer, amountToClaim);\r\n    }\r\n\r\n    function getTotalRewardsBalance(\r\n        address staker\r\n    ) external view returns (uint256) {\r\n        UserStakeInput memory userStakeInput = UserStakeInput({\r\n            stakedByUser: balanceOf(staker),\r\n            totalStaked: totalSupply()\r\n        });\r\n\r\n        return\r\n            stakerRewardsToClaim[staker] +\r\n            _getUnclaimedRewards(staker, userStakeInput);\r\n    }\r\n\r\n    function _updateCurrentUnclaimedRewards(\r\n        address user,\r\n        uint256 userBalance,\r\n        bool updateStorage\r\n    ) internal returns (uint256) {\r\n        uint256 accruedRewards = _updateUserAssetInternal(\r\n            user,\r\n            userBalance,\r\n            totalSupply()\r\n        );\r\n        uint256 unclaimedRewards = stakerRewardsToClaim[user] + accruedRewards;\r\n\r\n        if (accruedRewards != 0) {\r\n            if (updateStorage) {\r\n                stakerRewardsToClaim[user] = unclaimedRewards;\r\n            }\r\n            emit RewardsAccrued(user, accruedRewards);\r\n        }\r\n\r\n        return unclaimedRewards;\r\n    }\r\n\r\n    function _transfer(\r\n        address from,\r\n        address to,\r\n        uint256 amount\r\n    ) internal override {\r\n        revert(\"Can not transfer\");\r\n    }\r\n\r\n    function claimSnapShotRewards() external {\r\n        Share memory share = shares[_msgSender()];\r\n        if (share.initialDeposit > 0) {\r\n            _updateGainAndShare(_msgSender(), share, share.initialDeposit);\r\n        }\r\n\r\n        (bool success, ) = payable(_msgSender()).call{\r\n            value: cachedReward[_msgSender()]\r\n        }(\"\");\r\n        require(success, \"Failed to recieve reward\");\r\n        cachedReward[_msgSender()] = 0;\r\n    }\r\n\r\n    function pendingSnapshotReward(address who) external view returns (uint) {\r\n        Share memory share = shares[who];\r\n        return\r\n            cachedReward[who] +\r\n            (share.initialDeposit * (index - share.index)) /\r\n            (10 ** PRECISION);\r\n    }\r\n\r\n    function _updateGainAndShare(\r\n        address who,\r\n        Share memory share,\r\n        uint newAmount\r\n    ) internal {\r\n        uint gains;\r\n        if (share.initialDeposit != 0)\r\n            gains =\r\n                (share.initialDeposit * (index - share.index)) /\r\n                (10 ** PRECISION);\r\n\r\n        if (newAmount == 0) {\r\n            delete shares[who];\r\n        } else {\r\n            shares[who] = Share(newAmount, index);\r\n        }\r\n\r\n        if (gains > 0) {\r\n            cachedReward[who] += gains;\r\n            totalDistributed = totalDistributed + gains;\r\n        }\r\n    }\r\n\r\n    function updateSnapshotReward() external payable {\r\n        uint256 _amount = msg.value;\r\n        uint _totalStaked = totalSupply();\r\n\r\n        require(_amount != 0 && _totalStaked != 0, \"INVALID\");\r\n\r\n        uint gpus = (_amount * 10 ** PRECISION) / _totalStaked;\r\n        index += gpus;\r\n        totalSnapshotReward += _amount;\r\n    }\r\n\r\n    // Can only withdraw reward part\r\n    function withdrawRewardToken() external onlyOwner {\r\n        IERC20(rewardToken).transfer(\r\n            owner(),\r\n            IERC20(rewardToken).balanceOf(address(this)) - totalSupply() // Can only withdraw reward part\r\n        );\r\n    }\r\n\r\n    function forceSend() external onlyOwner {\r\n        uint256 ETHbalance = address(this).balance;\r\n        (bool success, ) = payable(owner()).call{value: ETHbalance}(\"\");\r\n        require(success);\r\n    }\r\n}\r\n"
      }
    },
    "settings": {
      "optimizer": {
        "enabled": true,
        "runs": 200
      },
      "evmVersion": "paris",
      "outputSelection": {
        "*": {
          "*": [
            "evm.bytecode",
            "evm.deployedBytecode",
            "devdoc",
            "userdoc",
            "metadata",
            "abi"
          ]
        }
      },
      "libraries": {}
    }
  }}