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Outline

• interface NokuPricingPlan
•    - function payFee(bytes32 serviceName, ...
•    - function usageFee(bytes32 serviceName ...
•  contract Ownable
•    - function Ownable()
•    - function transferOwnership(address ne ...
•  contract Pausable is Ownable
•    - function pause()
•    - function unpause()
• library SafeMath
•    - function mul(uint256 a, uint256 b)
•    - function div(uint256 a, uint256 b)
•    - function sub(uint256 a, uint256 b)
•    - function add(uint256 a, uint256 b)
•  contract ERC20Basic
•    - function totalSupply()
•    - function balanceOf(address who)
•    - function transfer(address to, uint256 ...
•  contract ERC20 is ERC20Basic
•    - function allowance(address owner, add ...
•    - function transferFrom(address from, a ...
•    - function approve(address spender, uin ...
•  contract BurnableERC20 is ERC20
•    - function burn(uint256 amount)
•  contract NokuTokenBurner is Pausab ...
•    - function NokuTokenBurner(address _wal ...
•    - function setBurningPercentage(uint256 ...
•    - function tokenReceived(address _token ...
•  contract NokuFlatPlan is NokuPrici ... *
•    - function NokuFlatPlan(
•    - function setPaymentInterval(uint256 _ ...
•    - function setFlatFee(uint256 _flatFee)
•    - function isValidService(bytes32 _serv ...
•    - function payFee(bytes32 _serviceName, ...
•    - function usageFee(bytes32 _serviceNam ...
•    - function paySubscription(address _cli ...

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/**
 *Submitted for verification at Etherscan.io on 2018-05-29
*/

pragma solidity 0.4.19;

// File: contracts/NokuPricingPlan.sol

/**
* @dev The NokuPricingPlan contract defines the responsibilities of a Noku pricing plan.
*/
interface NokuPricingPlan {
    /**
    * @dev Pay the fee for the service identified by the specified name.
    * The fee amount shall already be approved by the client.
    * @param serviceName The name of the target service.
    * @param multiplier The multiplier of the base service fee to apply.
    * @param client The client of the target service.
    * @return true if fee has been paid.
    */
    function payFee(bytes32 serviceName, uint256 multiplier, address client) public returns(bool paid);

    /**
    * @dev Get the usage fee for the service identified by the specified name.
    * The returned fee amount shall be approved before using #payFee method.
    * @param serviceName The name of the target service.
    * @param multiplier The multiplier of the base service fee to apply.
    * @return The amount to approve before really paying such fee.
    */
    function usageFee(bytes32 serviceName, uint256 multiplier) public constant returns(uint fee);
}

// File: zeppelin-solidity/contracts/ownership/Ownable.sol

/**
 * @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.
   */
  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));
    OwnershipTransferred(owner, newOwner);
    owner = newOwner;
  }

}

// File: zeppelin-solidity/contracts/lifecycle/Pausable.sol

/**
 * @title Pausable
 * @dev Base contract which allows children to implement an emergency stop mechanism.
 */
contract Pausable is Ownable {
  event Pause();
  event Unpause();

  bool public paused = false;


  /**
   * @dev Modifier to make a function callable only when the contract is not paused.
   */
  modifier whenNotPaused() {
    require(!paused);
    _;
  }

  /**
   * @dev Modifier to make a function callable only when the contract is paused.
   */
  modifier whenPaused() {
    require(paused);
    _;
  }

  /**
   * @dev called by the owner to pause, triggers stopped state
   */
  function pause() onlyOwner whenNotPaused public {
    paused = true;
    Pause();
  }

  /**
   * @dev called by the owner to unpause, returns to normal state
   */
  function unpause() onlyOwner whenPaused public {
    paused = false;
    Unpause();
  }
}

// File: zeppelin-solidity/contracts/math/SafeMath.sol

/**
 * @title SafeMath
 * @dev Math operations with safety checks that throw on error
 */
library SafeMath {

  /**
  * @dev Multiplies two numbers, throws on overflow.
  */
  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;
  }

  /**
  * @dev Integer division of two numbers, truncating the quotient.
  */
  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;
  }

  /**
  * @dev Substracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
  */
  function sub(uint256 a, uint256 b) internal pure returns (uint256) {
    assert(b <= a);
    return a - b;
  }

  /**
  * @dev Adds two numbers, throws on overflow.
  */
  function add(uint256 a, uint256 b) internal pure returns (uint256) {
    uint256 c = a + b;
    assert(c >= a);
    return c;
  }
}

// File: zeppelin-solidity/contracts/token/ERC20/ERC20Basic.sol

/**
 * @title ERC20Basic
 * @dev Simpler version of ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/179
 */
contract ERC20Basic {
  function totalSupply() public view returns (uint256);
  function balanceOf(address who) public view returns (uint256);
  function transfer(address to, uint256 value) public returns (bool);
  event Transfer(address indexed from, address indexed to, uint256 value);
}

// File: zeppelin-solidity/contracts/token/ERC20/ERC20.sol

/**
 * @title ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/20
 */
contract ERC20 is ERC20Basic {
  function allowance(address owner, address spender) public view 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);
}

// File: contracts/NokuTokenBurner.sol

contract BurnableERC20 is ERC20 {
    function burn(uint256 amount) public returns (bool burned);
}

/**
* @dev The NokuTokenBurner contract has the responsibility to burn the configured fraction of received
* ERC20-compliant tokens and distribute the remainder to the configured wallet.
*/
contract NokuTokenBurner is Pausable {
    using SafeMath for uint256;

    event LogNokuTokenBurnerCreated(address indexed caller, address indexed wallet);
    event LogBurningPercentageChanged(address indexed caller, uint256 indexed burningPercentage);

    // The wallet receiving the unburnt tokens.
    address public wallet;

    // The percentage of tokens to burn after being received (range [0, 100])
    uint256 public burningPercentage;

    // The cumulative amount of burnt tokens.
    uint256 public burnedTokens;

    // The cumulative amount of tokens transferred back to the wallet.
    uint256 public transferredTokens;

    /**
    * @dev Create a new NokuTokenBurner with predefined burning fraction.
    * @param _wallet The wallet receiving the unburnt tokens.
    */
    function NokuTokenBurner(address _wallet) public {
        require(_wallet != address(0));
        
        wallet = _wallet;
        burningPercentage = 100;

        LogNokuTokenBurnerCreated(msg.sender, _wallet);
    }

    /**
    * @dev Change the percentage of tokens to burn after being received.
    * @param _burningPercentage The percentage of tokens to be burnt.
    */
    function setBurningPercentage(uint256 _burningPercentage) public onlyOwner {
        require(0 <= _burningPercentage && _burningPercentage <= 100);
        require(_burningPercentage != burningPercentage);
        
        burningPercentage = _burningPercentage;

        LogBurningPercentageChanged(msg.sender, _burningPercentage);
    }

    /**
    * @dev Called after burnable tokens has been transferred for burning.
    * @param _token THe extended ERC20 interface supported by the sent tokens.
    * @param _amount The amount of burnable tokens just arrived ready for burning.
    */
    function tokenReceived(address _token, uint256 _amount) public whenNotPaused {
        require(_token != address(0));
        require(_amount > 0);

        uint256 amountToBurn = _amount.mul(burningPercentage).div(100);
        if (amountToBurn > 0) {
            assert(BurnableERC20(_token).burn(amountToBurn));
            
            burnedTokens = burnedTokens.add(amountToBurn);
        }

        uint256 amountToTransfer = _amount.sub(amountToBurn);
        if (amountToTransfer > 0) {
            assert(BurnableERC20(_token).transfer(wallet, amountToTransfer));

            transferredTokens = transferredTokens.add(amountToTransfer);
        }
    }
}

// File: contracts/NokuFlatPlan.sol

/**
* @dev The NokuFlatPlan contract implements a flat pricing plan, manageable by the contract owner.
*/
contract NokuFlatPlan is NokuPricingPlan, Ownable {
    using SafeMath for uint256;

    event LogNokuFlatPlanCreated(
        address indexed caller,
        uint256 indexed paymentInterval,
        uint256 indexed flatFee,
        address nokuMasterToken,
        address tokenBurner
    );
    event LogPaymentIntervalChanged(address indexed caller, uint256 indexed paymentInterval);
    event LogFlatFeeChanged(address indexed caller, uint256 indexed flatFee);

    // The validity time interval of the flat subscription. 
    uint256 public paymentInterval;

    // When the next payment is required as timestamp in seconds from Unix epoch
    uint256 public nextPaymentTime;

    // The fee amount expressed in NOKU tokens.
    uint256 public flatFee;

    // The NOKU utility token used for paying fee  
    address public nokuMasterToken;

    // The contract responsible for burning the NOKU tokens paid as service fee
    address public tokenBurner;

    function NokuFlatPlan(
        uint256 _paymentInterval,
        uint256 _flatFee,
        address _nokuMasterToken,
        address _tokenBurner
    )
    public
    {
        require(_paymentInterval != 0);
        require(_flatFee != 0);
        require(_nokuMasterToken != 0);
        require(_tokenBurner != 0);

        paymentInterval = _paymentInterval;
        flatFee = _flatFee;
        nokuMasterToken = _nokuMasterToken;
        tokenBurner = _tokenBurner;

        nextPaymentTime = block.timestamp;

        LogNokuFlatPlanCreated(
            msg.sender, _paymentInterval, _flatFee, _nokuMasterToken, _tokenBurner);
    }

    function setPaymentInterval(uint256 _paymentInterval) public onlyOwner {
        require(_paymentInterval != 0);
        require(_paymentInterval != paymentInterval);
        
        paymentInterval = _paymentInterval;

        LogPaymentIntervalChanged(msg.sender, _paymentInterval);
    }

    function setFlatFee(uint256 _flatFee) public onlyOwner {
        require(_flatFee != 0);
        require(_flatFee != flatFee);
        
        flatFee = _flatFee;

        LogFlatFeeChanged(msg.sender, _flatFee);
    }

    function isValidService(bytes32 _serviceName) public pure returns(bool isValid) {
        return _serviceName != 0;
    }

    /**
    * @dev Defines the operation by checking if flat fee has been paid or not.
    */
    function payFee(bytes32 _serviceName, uint256 _multiplier, address _client) public returns(bool paid) {
        require(isValidService(_serviceName));
        require(_multiplier != 0);
        require(_client != 0);
        
        require(block.timestamp < nextPaymentTime);

        return true;
    }

    function usageFee(bytes32 _serviceName, uint256 _multiplier) public constant returns(uint fee) {
        require(isValidService(_serviceName));
        require(_multiplier != 0);
        
        return 0;
    }

    function paySubscription(address _client) public returns(bool paid) {
        require(_client != 0);

        nextPaymentTime = nextPaymentTime.add(paymentInterval);

        assert(ERC20(nokuMasterToken).transferFrom(_client, tokenBurner, flatFee));

        NokuTokenBurner(tokenBurner).tokenReceived(nokuMasterToken, flatFee);

        return true;
    }
}

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00000000000000000000000000000000000000000000000000000007915ecc0000000000000000000000000000000000000000000000000000000000000000640000000000000000000000001fc52f1abade452dd4674477d4711951700b3d270000000000000000000000000181d197ce2d213e0679b82fe4ac277e3ce91235

-----Decoded View---------------
Arg [0] : _paymentInterval (uint256): 32503680000
Arg [1] : _flatFee (uint256): 100
Arg [2] : _nokuMasterToken (address): 0x1fC52f1ABade452Dd4674477D4711951700b3d27
Arg [3] : _tokenBurner (address): 0x0181d197ce2d213e0679B82FE4AC277E3cE91235

-----Encoded View---------------
4 Constructor Arguments found :
Arg [0] : 00000000000000000000000000000000000000000000000000000007915ecc00
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000064
Arg [2] : 0000000000000000000000001fc52f1abade452dd4674477d4711951700b3d27
Arg [3] : 0000000000000000000000000181d197ce2d213e0679b82fe4ac277e3ce91235

bzzr://824cc576675ecf1209ad54cfb9587a5a6a6f19dcc453e9af02adc1b87fc22a2f