// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity >=0.7.5;

interface IERC20 {

  function decimals() external view returns (uint8);
  
  /**
   * @dev Returns the amount of tokens in existence.
   */
  function totalSupply() external view returns (uint256);

  /**
   * @dev Returns the amount of tokens owned by `account`.
   */
  function balanceOf(address account) external view returns (uint256);

  /**
   * @dev Moves `amount` tokens from the caller's account to `recipient`.
   *
   * Returns a boolean value indicating whether the operation succeeded.
   *
   * Emits a {Transfer} event.
   */
  function transfer(address recipient, uint256 amount) external returns (bool);

  /**
   * @dev Returns the remaining number of tokens that `spender` will be
   * allowed to spend on behalf of `owner` through {transferFrom}. This is
   * zero by default.
   *
   * This value changes when {approve} or {transferFrom} are called.
   */
  function allowance(address owner, address spender) external view returns (uint256);

  /**
   * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
   *
   * Returns a boolean value indicating whether the operation succeeded.
   *
   * IMPORTANT: Beware that changing an allowance with this method brings the risk
   * that someone may use both the old and the new allowance by unfortunate
   * transaction ordering. One possible solution to mitigate this race
   * condition is to first reduce the spender's allowance to 0 and set the
   * desired value afterwards:
   * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
   *
   * Emits an {Approval} event.
   */
  function approve(address spender, uint256 amount) external returns (bool);

  /**
   * @dev Moves `amount` tokens from `sender` to `recipient` using the
   * allowance mechanism. `amount` is then deducted from the caller's
   * allowance.
   *
   * Returns a boolean value indicating whether the operation succeeded.
   *
   * Emits a {Transfer} event.
   */
  function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

  /**
   * @dev Emitted when `value` tokens are moved from one account (`from`) to
   * another (`to`).
   *
   * Note that `value` may be zero.
   */
  event Transfer(address indexed from, address indexed to, uint256 value);

  /**
   * @dev Emitted when the allowance of a `spender` for an `owner` is set by
   * a call to {approve}. `value` is the new allowance.
   */
  event Approval(address indexed owner, address indexed spender, uint256 value);
}

// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity >=0.7.5;

interface IOwnable {
  function owner() external view returns (address);

  function renounceManagement() external;
  
  function pushManagement( address newOwner_ ) external;
  
  function pullManagement() external;
}

// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;

interface IStaking {
    function stake( uint _amount, address _recipient ) external returns ( bool );

    function claim( address _recipient ) external;

    function forfeit() external returns (uint256);

    function toggleDepositLock() external;

    function unstake( uint _amount, bool _trigger ) external;

    function rebase() external;

    function index() external view returns (uint256);

    function contractBalance() external view returns (uint256);

}

// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity >=0.7.5;

import "../interfaces/IOwnable.sol";

abstract contract Ownable is IOwnable {

    address internal _owner;
    address internal _newOwner;

    event OwnershipPushed(address indexed previousOwner, address indexed newOwner);
    event OwnershipPulled(address indexed previousOwner, address indexed newOwner);

    constructor () {
        _owner = msg.sender;
        emit OwnershipPushed( address(0), _owner );
    }

    function owner() public view override returns (address) {
        return _owner;
    }

    modifier onlyOwner() {
        require( _owner == msg.sender, "Ownable: caller is not the owner" );
        _;
    }

    function renounceManagement() public virtual override onlyOwner() {
        emit OwnershipPulled( _owner, address(0) );
        _owner = address(0);
        _newOwner = address(0);
    }

    function pushManagement( address newOwner_ ) public virtual override onlyOwner() {
        emit OwnershipPushed( _owner, newOwner_ );
        _newOwner = newOwner_;
    }
    
    function pullManagement() public virtual override {
        require( msg.sender == _newOwner, "Ownable: must be new owner to pull");
        emit OwnershipPulled( _owner, _newOwner );
        _owner = _newOwner;
        _newOwner = address(0);
    }
}

// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity 0.7.5;

import "./interfaces/IERC20.sol";
import "./interfaces/IStaking.sol";
import "./helper/Ownable.sol";

contract StakingHelper2 is Ownable{

    address public staking;
    address public immutable trava;

    constructor ( address _staking, address _trava ) {
        require( _staking != address(0) );
        staking = _staking;
        require( _trava != address(0) );
        trava = _trava;
    }

    function approveStaking(uint _amount ) external onlyOwner{
        IERC20( trava ).approve( staking, _amount );
    }

    function setStaking(address _staking ) external onlyOwner{        
        staking = _staking;
    }

    function stake( uint _amount , address _recipient) external {
        IERC20( trava ).transferFrom( msg.sender, address(this), _amount );
        IStaking( staking ).stake( _amount, _recipient );
        IStaking( staking ).claim( _recipient );
    }
}

{
  "compilationTarget": {
    "contracts/StakingHelperRework.sol": "StakingHelper2"
  },
  "evmVersion": "istanbul",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "remappings": []
}