pragma solidity 0.4.24;

/**
 * @title SafeMath
 * @dev Math operations with safety checks that throw on error
 */
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) {
    // assert(b > 0); // Solidity automatically throws when dividing by 0
    uint256 c = a / b;
    // assert(a == b * c + a % b); // There is no case in which this doesn't hold
    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;
  }
}
/**
 * @title Ownable
 * @dev The Ownable contract has an owner address, and provides basic authorization control
 * functions, this simplifies the implementation of "user permissions".
 */
contract Ownable {
  address public owner;


  event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);


  /**
   * @dev The Ownable constructor sets the original `owner` of the contract to the sender
   * account.
   */
  constructor() public {
    owner = msg.sender;
  }

  /**
   * @dev Throws if called by any account other than the owner.
   */
  modifier onlyOwner() {
    require(msg.sender == owner,"Sender not authorized");
    _;
  }

  /**
   * @dev Allows the current owner to transfer control of the contract to a newOwner.
   * @param newOwner The address to transfer ownership to.
   */
  function transferOwnership(address newOwner) public onlyOwner {
    require(newOwner != address(0));
    emit OwnershipTransferred(owner, newOwner);
    owner = newOwner;
  }

}

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 DaigouResellerTokenAD is Ownable{
    
  // The token being sold
  ERC20Interface public token;

  
  mapping(address=>bool) airdroppedTo;
  uint public TOTAL_AIRDROPPED_TOKENS;
  uint public Airdrop_Limit;
  
  /**
   * event for token purchase logging
   * @param purchaser who paid for the tokens
   * @param beneficiary who got the tokens
   * @param value weis paid for purchase
   * @param amount amount of tokens purchased
   */
  event TokenPurchase(address indexed purchaser, address indexed beneficiary, uint256 value, uint256 amount);

  constructor(address _wallet, address _tokenAddress) public 
  {
    require(_wallet != 0x0);
    require (_tokenAddress != 0x0);
    owner = _wallet;
    token = ERC20Interface(_tokenAddress);
    TOTAL_AIRDROPPED_TOKENS = 0;
    Airdrop_Limit=100000000*10**18;
  }
  
  // fallback function can be used to buy tokens
  function () public payable {
    revert();
  }

    /**
     * airdrop to token holders
     **/ 
    function BulkTransfer(address[] tokenHolders, uint[] amount) public onlyOwner {
        require (TOTAL_AIRDROPPED_TOKENS<=Airdrop_Limit);
        for(uint i = 0; i<tokenHolders.length; i++)
        {
            if (!airdroppedTo[tokenHolders[i]])
            {
                token.transferFrom(owner,tokenHolders[i],amount[i]);
                airdroppedTo[tokenHolders[i]] = true;
                TOTAL_AIRDROPPED_TOKENS += amount[i];
            }
        }
    }
}