Contract Source Code:

/**
                                   Yakuza Inu
                            https://www.yakuza-inu.net
*/


// SPDX-License-Identifier: Unlicensed
pragma solidity ^0.5.0;

interface IERC20 {
    function totalSupply() external view returns (uint256);
  function balanceOf(address who) external view returns (uint256);
  function allowance(address owner, address spender) external view returns (uint256);
  function transfer(address to, uint256 value) external returns (bool);
  function approve(address spender, uint256 value) external returns (bool);
  function transferFrom(address from, address to, uint256 value) external returns (bool);

  event Transfer(address indexed from, address indexed to, uint256 value);
  event Approval(address indexed owner, address indexed spender, uint256 value);
}

library SafeMath {
  function mul(uint256 a, uint256 b) internal pure returns (uint256) {
    if (a == 0) {
      return 0;
    }
    uint256 c = a * b;
    assert(c / a == b);
    return c;
  }

  function div(uint256 a, uint256 b) internal pure returns (uint256) {
    uint256 c = a / b;
    return c;
  }

  function sub(uint256 a, uint256 b) internal pure returns (uint256) {
    assert(b <= a);
    return a - b;
  }

  function add(uint256 a, uint256 b) internal pure returns (uint256) {
    uint256 c = a + b;
    assert(c >= a);
    return c;
  }

  function ceil(uint256 a, uint256 m) internal pure returns (uint256) {
    uint256 c = add(a,m);
    uint256 d = sub(c,1);
    return mul(div(d,m),m);
  }
}

contract ERC20Detailed is IERC20 {

  string private _name;
  string private _symbol;
  uint8 private _decimals;

  constructor(string memory name, string memory symbol, uint8 decimals) public {
    _name = name;
    _symbol = symbol;
    _decimals = decimals;
  }

  function name() public view returns(string memory) {
    return _name;
  }

  function symbol() public view returns(string memory) {
    return _symbol;
  }

  function decimals() public view returns(uint8) {
    return _decimals;
  }
}

contract YakuzaInu is ERC20Detailed {

  using SafeMath for uint256;
  mapping (address => uint256) private _balances;
  mapping (address => mapping (address => uint256)) private _allowed;

  string constant tokenName = "Yakuza Inu";
  string constant tokenSymbol = "YakuzaInu";
  uint8  constant tokenDecimals = 18;
  uint256 _totalSupply = 1000000000 *10**18; 
  uint256 public basePercent = 100;
  uint256 public _burnStopAmount;
  uint256 public _lastTokenSupply;
  uint256 public maxTxAmount = 1500000 * 10**18;
  address currentOwner;// = msg.sender;
  mapping (address => bool) private _isBlackListed;
  
  constructor() public payable ERC20Detailed(tokenName, tokenSymbol, tokenDecimals) {

    _mint(msg.sender, _totalSupply);
    _burnStopAmount = 0;
    _lastTokenSupply = 200000 * 10**18;
    currentOwner = msg.sender;
    
  }
  
  event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
  
  function token_owner() public view returns (address) {
    return currentOwner;
  }
  
  function setMaxTxAmount(uint256 theAmount) external {
      require(msg.sender == currentOwner, "only token current owner can do this");
      maxTxAmount = theAmount * 10**18;
  }

  function removeFromBlackList(address account) external {
      require(msg.sender == currentOwner, "only token current owner can do this");
        _isBlackListed[account] = false;//if address is set to true, it is blacklisted else not blacklisted
    }

  function addToBlackList(address account) external {
      require(msg.sender == currentOwner, "only token current owner can do this");
        _isBlackListed[account] = true;//if address is set to true, it is blacklisted
    }
    
    function isBlackListed(address account) public view returns (bool) {
    return _isBlackListed[account];
  }
  
  function transferOwnership(address newOwner) external {
        require(msg.sender == currentOwner, "only token current owner can do this");
        
        emit OwnershipTransferred(currentOwner, newOwner);
        currentOwner = newOwner;
    }

  function totalSupply() public view returns (uint256) {
    return _totalSupply;
  }

  function balanceOf(address owner) public view returns (uint256) {
    return _balances[owner];
  }

  function allowance(address owner, address spender) public view returns (uint256) {
    return _allowed[owner][spender];
  }

  function findOnePercent(uint256 value) public view returns (uint256)  {
    uint256 roundValue = value.ceil(basePercent);
    uint256 onePercent = roundValue.mul(basePercent).div(10000);
    return onePercent;
  }

  function transfer(address to, uint256 value) public returns (bool) {
    require(value <= _balances[msg.sender]);
    require(to != address(0));
    address caller = msg.sender;
    require(to != caller, "you can't send to yourself");
    require(value <= maxTxAmount, "Transfer amount exceeds the maxTxAmount.");
    require(!_isBlackListed[to], "this address is blacklisted");

    uint256 tokensToBurn = findOnePercent(value);
    uint256 tokensToTransfer = value.sub(tokensToBurn);

    _balances[msg.sender] = _balances[msg.sender].sub(value);
    _balances[to] = _balances[to].add(tokensToTransfer);

    _totalSupply = _totalSupply.sub(tokensToBurn);

    emit Transfer(msg.sender, to, tokensToTransfer);
    emit Transfer(msg.sender, address(0), tokensToBurn);
    return true;
  }

  function multiTransfer(address[] memory receivers, uint256[] memory amounts) public {
    for (uint256 i = 0; i < receivers.length; i++) {
      transfer(receivers[i], amounts[i]);
    }
  }

  function approve(address spender, uint256 value) public returns (bool) {
    require(spender != address(0));
    _allowed[msg.sender][spender] = value;
    emit Approval(msg.sender, spender, value);
    return true;
  }

  function transferFrom(address from, address to, uint256 value) public returns (bool) {
    require(value <= _balances[from]);
    require(value <= _allowed[from][msg.sender]);
    require(to != address(0));
    
    address caller = msg.sender;
    require(to != caller, "you can't send to yourself");
    require(value <= maxTxAmount, "Transfer amount exceeds the maxTxAmount.");
    require(!_isBlackListed[to], "this address is blacklisted");

    _balances[from] = _balances[from].sub(value);

    uint256 tokensToBurn = findOnePercent(value);
    uint256 tokensToTransfer = value.sub(tokensToBurn);

    _balances[to] = _balances[to].add(tokensToTransfer);
    _totalSupply = _totalSupply.sub(tokensToBurn);

    _allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value);

    emit Transfer(from, to, tokensToTransfer);
    emit Transfer(from, address(0), tokensToBurn);

    return true;
  }

  function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
    require(spender != address(0));
    _allowed[msg.sender][spender] = (_allowed[msg.sender][spender].add(addedValue));
    emit Approval(msg.sender, spender, _allowed[msg.sender][spender]);
    return true;
  }

  function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
    require(spender != address(0));
    _allowed[msg.sender][spender] = (_allowed[msg.sender][spender].sub(subtractedValue));
    emit Approval(msg.sender, spender, _allowed[msg.sender][spender]);
    return true;
  }

  function _mint(address account, uint256 amount) internal {
    require(amount != 0);
    _balances[account] = _balances[account].add(amount);
    emit Transfer(address(0), account, amount);
  }

  function burn(uint256 amount) external {
    _burn(msg.sender, amount);
  }
  function _burn(address account, uint256 amount) internal {
    require(amount != 0);
    require(amount <= _balances[account]);
    _totalSupply = _totalSupply.sub(amount);
    _balances[account] = _balances[account].sub(amount);
    emit Transfer(account, address(0), amount);
  }

  function burnFrom(address account, uint256 amount) external {
    require(amount <= _allowed[account][msg.sender]);
    _allowed[account][msg.sender] = _allowed[account][msg.sender].sub(amount);
    _burn(account, amount);
  }

  

}