pragma solidity ^0.4.25;

interface ERC20 {
    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 approveAndCall(address spender, uint tokens, bytes data) external returns (bool success);
    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);
}

interface ApproveAndCallFallBack {
    function receiveApproval(address from, uint256 tokens, address token, bytes data) external;
}

contract TEST2 is ERC20 {
    using SafeMath for uint256;

    mapping (address => uint256) private balances;
    mapping (address => mapping (address => uint256)) private allowed;
    string public constant name  = "Test2";
    string public constant symbol = "TEST";
    uint8 public constant decimals = 18;
    address owner = msg.sender;
    uint256 _totalSupply = 1000000 * (10 ** 18); // 1 million supply
    bool public transactionLimitEnabled = true;
    uint256 public maxTransactionLimit = _totalSupply * 2 / 100; // 2% of total supply

    constructor() public {
        balances[msg.sender] = _totalSupply;
        emit Transfer(address(0), msg.sender, _totalSupply);
    }

    function totalSupply() public view returns (uint256) {
        return _totalSupply;
    }

    function balanceOf(address player) public view returns (uint256) {
        return balances[player];
    }

    function allowance(address player, address spender) public view returns (uint256) {
        return allowed[player][spender];
    }

    function transfer(address to, uint256 value) public returns (bool) {
        require(value <= balances[msg.sender]);
        require(to != address(0));

        // Check if transaction limit is enabled and limit not exceeded
        if (msg.sender != owner && transactionLimitEnabled) {
            require(value <= maxTransactionLimit, "Exceeds max transaction limit");
        }

        balances[msg.sender] = balances[msg.sender].sub(value);
        balances[to] = balances[to].add(value);

        emit Transfer(msg.sender, to, value);
        return true;
    }

    function multiTransfer(address[] memory receivers, uint256[] memory amounts) public {
        require(receivers.length == amounts.length, "Arrays length mismatch");
        
        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 approveAndCall(address spender, uint256 tokens, bytes data) external returns (bool) {
        require(spender != address(0));
        require(tokens > 0, "Tokens must be greater than zero");
        
        allowed[msg.sender][spender] = tokens;
        emit Approval(msg.sender, spender, tokens);
        ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
        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));

        // Check if transaction limit is enabled and limit not exceeded
        if (from != owner && transactionLimitEnabled) {
            require(value <= maxTransactionLimit, "Exceeds max transaction limit");
        }

        balances[from] = balances[from].sub(value);
        balances[to] = balances[to].add(value);
        allowed[from][msg.sender] = allowed[from][msg.sender].sub(value);

        emit Transfer(from, to, value);
        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));
        uint256 currentAllowance = allowed[msg.sender][spender];
        require(currentAllowance >= subtractedValue, "Allowance is lower than subtracted value");
        
        allowed[msg.sender][spender] = currentAllowance.sub(subtractedValue);
        emit Approval(msg.sender, spender, allowed[msg.sender][spender]);
        return true;
    }

    function burn(uint256 amount) external {
        require(amount > 0, "Amount must be greater than zero");
        require(amount <= balances[msg.sender], "Insufficient balance");

        // Check if transaction limit is enabled and limit not exceeded
        if (msg.sender != owner && transactionLimitEnabled) {
            require(amount <= maxTransactionLimit, "Exceeds max transaction limit");
        }

        _totalSupply = _totalSupply.sub(amount);
        balances[msg.sender] = balances[msg.sender].sub(amount);
        emit Transfer(msg.sender, address(0), amount);
    }

    function removeLimits() external {
        require(msg.sender == owner, "Only the owner can remove limits");
        transactionLimitEnabled = false;
    }
}

library SafeMath {
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }
        uint256 c = a * b;
        require(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) {
        require(b <= a);
        return a - b;
    }

    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(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);
    }
}