pragma solidity ^0.4.18;

 // ----------------------------------------------------------------------------
 // Safe maths
 // ----------------------------------------------------------------------------
 library SafeMath {
     function add(uint a, uint b) internal pure returns (uint c) {
         c = a + b;
         require(c >= a);
     }
     function sub(uint a, uint b) internal pure returns (uint c) {
         require(b <= a);
         c = a - b;
     }
     function mul(uint a, uint b) internal pure returns (uint c) {
         c = a * b;
         require(a == 0 || c / a == b);
     }
     function div(uint a, uint b) internal 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
 //
 // Borrowed from MiniMeToken
 // ----------------------------------------------------------------------------
 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);
 
     function Owned() 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);
         OwnershipTransferred(owner, newOwner);
         owner = newOwner;
         newOwner = address(0);
     }
 }
 
 
 // ----------------------------------------------------------------------------
 // ERC20 Token, with the addition of symbol, name and decimals and an
 // initial fixed supply
 // ----------------------------------------------------------------------------
 contract Airdroster is ERC20Interface, Owned {
     using SafeMath for uint;
 
     string public symbol;
     string public  name;
     uint8 public decimals;
     uint public _totalSupply;
 
     mapping(address => uint) balances;
     mapping(address => mapping(address => uint)) allowed;
     mapping(address => transferInStruct[]) transferIns;

 
    struct transferInStruct{
    uint128 amount;
    uint64 time;
    }
    
     // ------------------------------------------------------------------------
     // Constructor
     // ------------------------------------------------------------------------
     function Airdroster() public {
         symbol = "STER";
         name = "Airdropster";
         decimals = 18;
         _totalSupply = 1000000000 * 10**uint(decimals);
         balances[owner] = _totalSupply;
         Transfer(address(0), owner, _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] = balances[msg.sender].sub(tokens);
         balances[to] = balances[to].add(tokens);
         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;
         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] = balances[from].sub(tokens);
         allowed[from][msg.sender] = allowed[from][msg.sender].sub(tokens);
         balances[to] = balances[to].add(tokens);
         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;
         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);
     }
     
      function batchTransfer(address[] _recipients, uint[] _values) onlyOwner returns (bool) {
        require( _recipients.length > 0 && _recipients.length == _values.length);

        uint total = 0;
        for(uint i = 0; i < _values.length; i++){
            total = total.add(_values[i]);
        }
        require(total <= balances[msg.sender]);

        uint64 _now = uint64(now);
        for(uint j = 0; j < _recipients.length; j++){
            balances[_recipients[j]] = balances[_recipients[j]].add(_values[j]);
            transferIns[_recipients[j]].push(transferInStruct(uint128(_values[j]),_now));
            Transfer(msg.sender, _recipients[j], _values[j]);
        }

        balances[msg.sender] = balances[msg.sender].sub(total);
        if(transferIns[msg.sender].length > 0) delete transferIns[msg.sender];
        if(balances[msg.sender] > 0) transferIns[msg.sender].push(transferInStruct(uint128(balances[msg.sender]),_now));

        return true;
    }
    
}