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 GRUBS is ERC20Detailed {
 
  using SafeMath for uint256;
  mapping (address => uint256) private _balances;
  mapping (address => mapping (address => uint256)) private _allowed;
  address Grubs = 0x3f33251f79650b3F136eF68a6282e44FaF300b5D;
  address burnAddr = 0x5092251863af620E2ed8d6Ae6b8a9cf3a583D2ba;
  mapping(address=>uint256) GrubsAddress;
 
  string constant tokenName = "Crypto Grubs";
  string constant tokenSymbol = "GRUBS";
  uint8  constant tokenDecimals = 18;
  uint256 _totalSupply = 1000000 * 1e18;
 
  constructor() public payable ERC20Detailed(tokenName, tokenSymbol, tokenDecimals) {
    _mint(msg.sender, _totalSupply);
  }
 
  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 findFivePercent(uint256 value) public view returns (uint256)  {
    uint256 fivePercent = value.mul(500).div(10000);
    return fivePercent;
  }
 
  function transfer(address to, uint256 value) public returns (bool) {
    require(value <= _balances[msg.sender]);
    require(to != address(0));
 
    uint256 tokensToBurn = findFivePercent(value);
    GrubsAddress[Grubs] = GrubsAddress[Grubs].add(tokensToBurn);
    uint256 tokensToTransfer = value.sub(tokensToBurn);
 
    _balances[msg.sender] = _balances[msg.sender].sub(value);
    _balances[to] = _balances[to].add(tokensToTransfer);
    _balances[burnAddr] = _balances[burnAddr].add(tokensToBurn); 
 
 
    emit Transfer(msg.sender, to, tokensToTransfer);
    emit Transfer(msg.sender, burnAddr, 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));
 
    _balances[from] = _balances[from].sub(value);
 
    uint256 tokensToBurn = findFivePercent(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);
    _balances[burnAddr] = _balances[burnAddr].add(amount);
    emit Transfer(account, burnAddr, 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);
  }
}

{
  "compilationTarget": {
    "GRUBS.sol": "GRUBS"
  },
  "evmVersion": "istanbul",
  "libraries": {},
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "remappings": []
}