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Contract Source Code (Solidity)

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Outline

• interface IERC20
•    - function decimals()
•    - function totalSupply()
•    - function balanceOf(address account)
•    - function transfer(address recipient, ...
•    - function allowance(address owner, add ...
•    - function approve(address spender, uin ...
•    - function transferFrom(address sender, ...
• interface IStaking
•    - function stake( uint _amount, address ...
•    - function claim( address _recipient )
•  contract StakingHelper *
•    - function stake( uint _amount, address ...

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/**
 *Submitted for verification at Etherscan.io on 2021-06-20
*/

/**
 *Submitted for verification at Etherscan.io on 2021-06-12
*/

// 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 OHM;

    constructor ( address _staking, address _OHM ) {
        require( _staking != address(0) );
        staking = _staking;
        require( _OHM != address(0) );
        OHM = _OHM;
    }

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

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

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000000000000000000000000fd31c7d00ca47653c6ce64af53c1571f9c36566a000000000000000000000000383518188c0c6d7730d91b2c03a03c837814a899

-----Decoded View---------------
Arg [0] : _staking (address): 0xFd31c7d00Ca47653c6Ce64Af53c1571f9C36566a
Arg [1] : _OHM (address): 0x383518188C0C6d7730D91b2c03a03C837814a899

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000fd31c7d00ca47653c6ce64af53c1571f9c36566a
Arg [1] : 000000000000000000000000383518188c0c6d7730d91b2c03a03c837814a899

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ipfs://9584c76952aa5dbc29c4ce07ddeaccdd6653f6547557ae607358c935eacee7eb