Contract Source Code (Solidity Standard Json-Input format)

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// 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);
}

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

contract StakingHelper {

    address public immutable staking;
    address public immutable MB;

    constructor ( address _staking, address _MB ) {
        require( _staking != address(0) );
        staking = _staking;
        require( _MB != address(0) );
        MB = _MB;
    }

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

{
  "metadata": {
    "bytecodeHash": "none"
  },
  "optimizer": {
    "enabled": true,
    "runs": 800
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

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[{"inputs":[{"internalType":"address","name":"_staking","type":"address"},{"internalType":"address","name":"_MB","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"MB","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"stake","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"staking","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"}]

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

000000000000000000000000eb74457d1dbe73b33353c44a351efa6651d0b2e1000000000000000000000000d6b17cc9e8abc9090462dd8f814309c757f965b7

-----Decoded View---------------
Arg [0] : _staking (address): 0xeB74457d1dBe73B33353c44A351Efa6651d0B2e1
Arg [1] : _MB (address): 0xD6B17Cc9e8aBc9090462dd8f814309C757F965b7

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000eb74457d1dbe73b33353c44a351efa6651d0b2e1
Arg [1] : 000000000000000000000000d6b17cc9e8abc9090462dd8f814309c757f965b7