Contract

Contract Source Code (Solidity)

IDE

• Blockscan IDE
• 🤖 Code ReaderBeta
• Remix IDE

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 ...

More Options

• Similar
• Sol2Uml
• Submit Audit
• Compare

/**
 *Submitted for verification at Etherscan.io on 2021-12-01
*/

// 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 USV;

    constructor ( address _staking, address _USV ) {
        require( _staking != address(0) );
        staking = _staking;
        require( _USV != address(0) );
        USV = _USV;
    }

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

• No Contract Security Audit Submitted- Submit Audit Here

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

000000000000000000000000f7d3b9727a0a94cf7eb53bc26d3b62db2613705500000000000000000000000088536c9b2c4701b8db824e6a16829d5b5eb84440

-----Decoded View---------------
Arg [0] : _staking (address): 0xf7d3B9727A0A94Cf7Eb53bc26D3B62Db26137055
Arg [1] : _USV (address): 0x88536C9B2C4701b8dB824e6A16829D5B5Eb84440

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000f7d3b9727a0a94cf7eb53bc26d3b62db26137055
Arg [1] : 00000000000000000000000088536c9b2c4701b8db824e6a16829d5b5eb84440

2810:612:0:-:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;2842:32;;;:::i;:::-;;;;;;;;;;;;;;;;;;;;;3115:304;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;:::i;:::-;;2881:28;;;:::i;:::-;;;;;;;;;;;;;;;;;;;;;2842:32;;;:::o;3115:304::-;3194:3;3186:26;;;3214:10;3234:4;3241:7;3186:64;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;3269:3;3261:21;;;3284:7;3293;3261:41;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;3323:7;3313:25;;;3340:7;3349:10;3313:48;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;3382:7;3372:25;;;3399:10;3372:39;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;3115:304;;:::o;2881:28::-;;;:::o

ipfs://14d81eeeb95a993945c394febe5892be9ff0cac507c973e68aa0c12887139956