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(uint256 _amount, address _recipient) external returns (bool);

  function claim(address _recipient) external;
}

contract StakingHelper {
  address public immutable staking;
  address public immutable DMND;

  constructor(address _staking, address _DMND) {
    require(_staking != address(0));
    staking = _staking;
    require(_DMND != address(0));
    DMND = _DMND;
  }

  function stake(uint256 _amount, address _recipient) external {
    IERC20(DMND).transferFrom(msg.sender, address(this), _amount);
    IERC20(DMND).approve(staking, _amount);
    IStaking(staking).stake(_amount, _recipient);
    IStaking(staking).claim(_recipient);
  }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 1000
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {}
}

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[{"inputs":[{"internalType":"address","name":"_staking","type":"address"},{"internalType":"address","name":"_DMND","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"DMND","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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

000000000000000000000000dcacd61fcc9cee58c6b38076d867ba4c7e738ca3000000000000000000000000144e3b02e08e644ffbb7ff652763f5b72ee22701

-----Decoded View---------------
Arg [0] : _staking (address): 0xdcaCD61fCC9CeE58C6B38076D867Ba4C7E738ca3
Arg [1] : _DMND (address): 0x144E3b02e08e644fFbB7fF652763F5B72eE22701

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000dcacd61fcc9cee58c6b38076d867ba4c7e738ca3
Arg [1] : 000000000000000000000000144e3b02e08e644ffbb7ff652763f5b72ee22701