pragma solidity ^0.4.24;

// ----------------------------------------------------------------------------
// 'BYB' token contract
//
// Deployed to : 0x96A14D81E5c72aD8F6BD5E4FB3Be53692a305629
// Symbol      : BYB
// Name        : Baye Coin
// Total supply: 20000001
// Decimals    : 18
//
// Enjoy.
//
// (c) by HURTEK BILISIM ve TEKNOLOJI AS 07.12.2018. The MIT Licence.
// ----------------------------------------------------------------------------


// ----------------------------------------------------------------------------
// Safe maths
// ----------------------------------------------------------------------------
contract SafeMath
{
    function safeAdd(uint a, uint b) public pure returns(uint c)
{
    c = a + b;
    require(c >= a);
}
function safeSub(uint a, uint b) public pure returns(uint c)
{
    require(b <= a);
    c = a - b;
}
function safeMul(uint a, uint b) public pure returns(uint c)
{
    c = a * b;
    require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) public pure returns(uint c)
{
    require(b > 0);
    c = a / b;
}
}


// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface
{
    function totalSupply() public constant returns(uint);
function balanceOf(address tokenOwner) public constant returns(uint balance);
function allowance(address tokenOwner, address spender) public constant returns(uint remaining);
function transfer(address to, uint tokens) public returns(bool success);
function approve(address spender, uint tokens) public returns(bool success);
function transferFrom(address from, address to, uint tokens) public returns(bool success);

event Transfer(address indexed from, address indexed to, uint tokens);
    event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}


// ----------------------------------------------------------------------------
// Contract function to receive approval and execute function in one call
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack
{
    function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}


// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned
{
    address public owner;
    address public newOwner;

    event OwnershipTransferred(address indexed _from, address indexed _to);

constructor() public {
        owner = msg.sender;
    }

    modifier onlyOwner
{
    require(msg.sender == owner);
    _;
}

function transferOwnership(address _newOwner) public onlyOwner {
        newOwner = _newOwner;
    }
    function acceptOwnership() public {
        require(msg.sender == newOwner);
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
        newOwner = address(0);
    }
}


// ----------------------------------------------------------------------------
// ERC20 Token, with the addition of symbol, name and decimals and assisted
// token transfers
// ----------------------------------------------------------------------------
contract BayeCoin is ERC20Interface, Owned, SafeMath {
    string public symbol;
    string public name;
    uint8 public decimals;
    uint public _totalSupply;

    mapping(address => uint) balances;
    mapping(address => mapping(address => uint)) allowed;


    // ------------------------------------------------------------------------
    // Constructor
    // ------------------------------------------------------------------------
    constructor() public {
        symbol = "BYB";
        name = "Baye Coin";
        decimals = 18;
        _totalSupply = 20000001000000000000000000;
        balances[0x96A14D81E5c72aD8F6BD5E4FB3Be53692a305629] = _totalSupply;
        emit Transfer(address(0), 0x96A14D81E5c72aD8F6BD5E4FB3Be53692a305629, _totalSupply);
    }


    // ------------------------------------------------------------------------
    // Total supply
    // ------------------------------------------------------------------------
    function totalSupply() public constant returns(uint)
{
    return _totalSupply - balances[address(0)];
}


// ------------------------------------------------------------------------
// Get the token balance for account tokenOwner
// ------------------------------------------------------------------------
function balanceOf(address tokenOwner) public constant returns(uint balance)
{
    return balances[tokenOwner];
}


// ------------------------------------------------------------------------
// Transfer the balance from token owner's account to to account
// - Owner's account must have sufficient balance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transfer(address to, uint tokens) public returns(bool success)
{
    balances[msg.sender] = safeSub(balances[msg.sender], tokens);
    balances[to] = safeAdd(balances[to], tokens);
    emit Transfer(msg.sender, to, tokens);
    return true;
}


// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account
//
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// recommends that there are no checks for the approval double-spend attack
// as this should be implemented in user interfaces 
// ------------------------------------------------------------------------
function approve(address spender, uint tokens) public returns(bool success)
{
    allowed[msg.sender][spender] = tokens;
    emit Approval(msg.sender, spender, tokens);
    return true;
}


// ------------------------------------------------------------------------
// Transfer tokens from the from account to the to account
// 
// The calling account must already have sufficient tokens approve(...)-d
// for spending from the from account and
// - From account must have sufficient balance to transfer
// - Spender must have sufficient allowance to transfer
// - 0 value transfers are allowed
// ------------------------------------------------------------------------
function transferFrom(address from, address to, uint tokens) public returns(bool success)
{
    balances[from] = safeSub(balances[from], tokens);
    allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
    balances[to] = safeAdd(balances[to], tokens);
    emit Transfer(from, to, tokens);
    return true;
}


// ------------------------------------------------------------------------
// Returns the amount of tokens approved by the owner that can be
// transferred to the spender's account
// ------------------------------------------------------------------------
function allowance(address tokenOwner, address spender) public constant returns(uint remaining)
{
    return allowed[tokenOwner][spender];
}


// ------------------------------------------------------------------------
// Token owner can approve for spender to transferFrom(...) tokens
// from the token owner's account. The spender contract function
// receiveApproval(...) is then executed
// ------------------------------------------------------------------------
function approveAndCall(address spender, uint tokens, bytes data) public returns(bool success)
{
    allowed[msg.sender][spender] = tokens;
    emit Approval(msg.sender, spender, tokens);
    ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
    return true;
}


// ------------------------------------------------------------------------
// Don't accept ETH
// ------------------------------------------------------------------------
function() public payable {
        revert();
    }


    // ------------------------------------------------------------------------
    // Owner can transfer out any accidentally sent ERC20 tokens
    // ------------------------------------------------------------------------
    function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns(bool success)
{
    return ERC20Interface(tokenAddress).transfer(owner, tokens);
}
}