Contract

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 2022-03-18
*/

// 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 GWS;

    constructor ( address _staking, address _GWS ) {
        require( _staking != address(0) );
        staking = _staking;
        require( _GWS != address(0) );
        GWS = _GWS;
    }

    function stake( uint _amount, address _recipient ) external {
        IERC20( GWS ).transferFrom( _recipient, address(this), _amount );
        IERC20( GWS ).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":"_GWS","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"GWS","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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

000000000000000000000000842222bbaeceb854993c5ad3f63e98fdff21439300000000000000000000000036f17bd0f7028c784b2e0c9b5a65dbe071a902d7

-----Decoded View---------------
Arg [0] : _staking (address): 0x842222BbaEcEb854993c5AD3F63e98fdFf214393
Arg [1] : _GWS (address): 0x36F17BD0F7028c784b2e0C9B5a65dBe071a902d7

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000842222bbaeceb854993c5ad3f63e98fdff214393
Arg [1] : 00000000000000000000000036f17bd0f7028c784b2e0c9b5a65dbe071a902d7

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ipfs://910f069eb3b6f786d67036eec95382a825c4f46c995bff84ab6b30900ba34950