text: /**********************************************************************
  *These solidity codes have been obtained from Etherscan for extracting
  *the smartcontract related info.
  *The data will be used by MATRIX AI team as the reference basis for
  *MATRIX model analysis,extraction of contract semantics,
  *as well as AI based data analysis, etc.
  **********************************************************************/
  pragma solidity ^0.4.18;
   
  /**
   * @title ERC20Basic
   * @dev Simpler version of ERC20 interface
   * @dev see https://github.com/ethereum/EIPs/issues/179
   */
  contract ERC20Basic {
    uint256 public totalSupply;
    function balanceOf(address who) public constant returns (uint256);
    function transfer(address to, uint256 value) public returns (bool);
    event Transfer(address indexed from, address indexed to, uint256 value);
  }
   
  /**
   * @title ERC20 interface
   * @dev see https://github.com/ethereum/EIPs/issues/20
   */
  contract ERC20 is ERC20Basic {
    function allowance(address owner, address spender) public constant returns (uint256);
    function transferFrom(address from, address to, uint256 value) public returns (bool);
    function approve(address spender, uint256 value) public returns (bool);
    event Approval(address indexed owner, address indexed spender, uint256 value);
  }
   
  /**
   * @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 Basic token
   * @dev Basic version of StandardToken, with no allowances. 
   */
  contract BasicToken is ERC20Basic {
      
    using SafeMath for uint256;
   
    mapping(address => uint256) balances;
   
    /**
    * @dev transfer token for a specified address
    * @param _to The address to transfer to.
    * @param _value The amount to be transferred.
    */
    function transfer(address _to, uint256 _value) public returns (bool) {
      balances[msg.sender] = balances[msg.sender].sub(_value);
      balances[_to] = balances[_to].add(_value);
      Transfer(msg.sender, _to, _value);
      return true;
    }
   
    /**
    * @dev Gets the balance of the specified address.
    * @param _owner The address to query the the balance of. 
    * @return An uint256 representing the amount owned by the passed address.
    */
    function balanceOf(address _owner) public constant returns (uint256 balance) {
      return balances[_owner];
    }
   
  }
   
  /**
   * @title Standard ERC20 token
   *
   * @dev Implementation of the basic standard token.
   * @dev https://github.com/ethereum/EIPs/issues/20
   * @dev Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
   */
  contract StandardToken is ERC20, BasicToken {
   
    mapping (address => mapping (address => uint256)) allowed;
   
    /**
     * @dev Transfer tokens from one address to another
     * @param _from address The address which you want to send tokens from
     * @param _to address The address which you want to transfer to
     * @param _value uint256 the amout of tokens to be transfered
     */
    function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
      var _allowance = allowed[_from][msg.sender];
   
      // Check is not needed because sub(_allowance, _value) will already throw if this condition is not met
      // require (_value <= _allowance);
   
      balances[_to] = balances[_to].add(_value);
      balances[_from] = balances[_from].sub(_value);
      allowed[_from][msg.sender] = _allowance.sub(_value);
      Transfer(_from, _to, _value);
      return true;
    }
   
    /**
     * @dev Aprove the passed address to spend the specified amount of tokens on behalf of msg.sender.
     * @param _spender The address which will spend the funds.
     * @param _value The amount of tokens to be spent.
     */
    function approve(address _spender, uint256 _value) public returns (bool) {
   
      // To change the approve amount you first have to reduce the addresses`
      //  allowance to zero by calling `approve(_spender, 0)` if it is not
      //  already 0 to mitigate the race condition described here:
      //  https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
      require((_value == 0) || (allowed[msg.sender][_spender] == 0));
   
      allowed[msg.sender][_spender] = _value;
      Approval(msg.sender, _spender, _value);
      return true;
    }
   
    /**
     * @dev Function to check the amount of tokens that an owner allowed to a spender.
     * @param _owner address The address which owns the funds.
     * @param _spender address The address which will spend the funds.
     * @return A uint256 specifing the amount of tokens still available for the spender.
     */
    function allowance(address _owner, address _spender) public constant returns (uint256 remaining) {
      return allowed[_owner][_spender];
    }
   
  }
   
  /**
   * @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;
   
    /**
     * @dev The Ownable constructor sets the original `owner` of the contract to the sender
     * account.
     */
    function Ownable() public {
      owner = msg.sender;
    }
   
    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
      require(msg.sender == owner);
      _;
    }
   
    /**
     * @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));      
      owner = newOwner;
    }
   
  }
   
  /**
   * @title Mintable token
   * @dev Simple ERC20 Token example, with mintable token creation
   * @dev Issue: * https://github.com/OpenZeppelin/zeppelin-solidity/issues/120
   * Based on code by TokenMarketNet: https://github.com/TokenMarketNet/ico/blob/master/contracts/MintableToken.sol
   */
   
  contract MintableToken is StandardToken, Ownable {
      
    event Mint(address indexed to, uint256 amount);
    
    event MintFinished();
   
    bool public mintingFinished = false;
   
    address public saleAgent;
    
     modifier canMint() {
     require(!mintingFinished);
      _;
    }
    
     modifier onlySaleAgent() {
     require(msg.sender == saleAgent);
      _;
    }
  
    function setSaleAgent(address newSaleAgent) public onlyOwner {
     saleAgent = newSaleAgent;
    }
  
    /**
     * @dev Function to mint tokens
     * @param _to The address that will recieve the minted tokens.
     * @param _amount The amount of tokens to mint.
     * @return A boolean that indicates if the operation was successful.
     */
    function mint(address _to, uint256 _amount) public onlySaleAgent canMint returns (bool) {
      totalSupply = totalSupply.add(_amount);
      balances[_to] = balances[_to].add(_amount);
      Mint(_to, _amount);
      return true;
    }
   
    /**
     * @dev Function to stop minting new tokens.
     * @return True if the operation was successful.
     */
    function finishMinting() public onlySaleAgent returns (bool) {
      mintingFinished = true;
      MintFinished();
      return true;
    }
    
  }
   
  contract AgroTechFarmToken is MintableToken {
      
      string public constant name = "Agro Tech Farm";
      
      string public constant symbol = "ATF";
      
      uint32 public constant decimals = 18;
  }