developeruche

[
    {
      "inputs": [],
      "name": "INSUFFICENT_POINTS",
      "type": "error"
    },
    {
      "inputs": [],
      "name": "INVALID_INPUT",
      "type": "error"

developeruche

{
  "abi": [
    {
      "inputs": [],
      "name": "INSUFFICENT_POINTS",
      "type": "error"
    },
    {
      "inputs": [],
      "name": "INVALID_INPUT",

developeruche

contract MsgData {
    function _fromUint(bytes memory data) internal pure returns(uint256 value) {
        uint256 value1;
        uint256 value2;

        assembly {
            value1 := mload(add(data, 36))
            value2 := mload(add(data, 68))
            value  := add(value1, value2)
        }

developeruche

pragma solidity 0.5.17;

/*
   ____            __   __        __   _
  / __/__ __ ___  / /_ / /  ___  / /_ (_)__ __
 _\ \ / // // _ \/ __// _ \/ -_)/ __// / \ \ /
/___/ \_, //_//_/\__//_//_/\__/ \__//_/ /_\_\
     /___/

* Synthetix: StakingRewards.sol

developeruche

/**
 *Submitted for verification at BscScan.com on 2022-07-24
*/

/**
 *Submitted for verification at BscScan.com on 2022-06-17
*/

// SPDX-License-Identifier: MIT
pragma solidity >=0.7.0 <0.8.0;

developeruche

//SPDX-License-Identifier: Unlicense
pragma solidity ^0.6.11;

Offchain Labs Solidity technical challenge:

Examine the DaoEscrowFarm contract provided. 
This is a simple system that allows users to deposit 1 eth per block, and withdraw their deposits in a future date. 
The implementation contains many flaws, including lack of optimisations and bugs that can be exploited to steal funds.

For this challenge we would like you to:

developeruche

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

contract MysteryBoxAuction {
    address contractOwner;
    uint auctionStartTime;
    bool auctionInProgress;
    address topBidder;
    uint topBid;

developeruche

{
  "_format": "hh-sol-artifact-1",
  "contractName": "ERC20",
  "sourceName": "@openzeppelin/contracts/token/ERC20/ERC20.sol",
  "abi": [
    {
      "inputs": [
        {
          "internalType": "string",
          "name": "name_",

developeruche

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;
import "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol";
import {IERC20} from "./interfaces/IERC20.sol";


contract NRFAirdrop {
    /// @dev this is the merkle root computed from the valid addresses
    bytes32 public merkleRoot = 0x747e8d346a2ec24ba37cef94c739e1157459a01a4002c7fae74874ec131dca6f;
    // bytes32 public merkleRoot = 0x514311ffd07d0034858e944ecb905ddc1994886b0a542867dbc7cac7440f108f;

developeruche

[
		{
			"inputs": [
				{
					"internalType": "uint256",
					"name": "_claimAmount",
					"type": "uint256"
				},
				{
					"internalType": "address",