Theo6890

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

// chosen to use an initializer instead of a constructor
import { OwnableUpgradeable } from "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
// chosen not to use Solady because EIP-2612 is not needed
import {
    ERC20Upgradeable,
    IERC20,
    IERC20Metadata

Theo6890

pragma solidity 0.8.23;

import {EIP712} from "openzeppelin-contracts/utils/cryptography/EIP712.sol";
import {ECDSA} from "openzeppelin-contracts/utils/cryptography/ECDSA.sol";

contract Swap is EIP712 {
    constructor() EIP712("Hand 2 Hand Exchange", "1") {}
    
    struct Data {
        IERC721 nft;

Theo6890

Audit Methodology

The Kaju Katli Approach

Notice the shape

1. We start from the bottom, approach the middle become large and then again become narrow down going to the top.
2. That means, I do not study the docs or try to get the larger picture about the protocol in the beginning.I completely avoid that.

Theo6890

// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.17;

import {MerkleProof} from "openzeppelin-contracts/utils/cryptography/MerkleProof.sol";
// install murky with: `forge install dmfxyz/murky --no-commit  ` 
import {Strings2} from "murky/differential_testing/test/utils/Strings2.sol";
import {Strings} from "openzeppelin-contracts/utils/Strings.sol";

import "forge-std/Test.sol";

Theo6890

/**
 *
 * @param {ethers.Wallet} wallet
 * @param {ethers.BigNumber} chainId
 * @param {string} verifyingContract
 * @returns {string} full signature
 * 
 * rewards is an object: {
            id: ethers.BigNumber,
            amount: ethers.BigNumber,

Theo6890

// consider our struct to be:
/** 
struct TaskReward {
        uint256 igoId;
        Tier tier;
        address rewardee;
        uint256 taskId;
}
*/

Theo6890

const { ethers } = require('ethers');
/** 
 * @notice Path to where your .env file is. If the .env is at the root of your project,
 *         you can simply write `require('dotenv').config()`
 */
require('dotenv').config({ path: '../../.env' });

async function main() {
    // instanciation can also be done using a private key 
    const wallet = new ethers.Wallet.fromMnemonic(process.env.SEED);

Theo6890

require("dotenv").config();
const { EthersEthereum } = require("@rarible/ethers-ethereum");
const fetch = (...args) =>
  import("node-fetch").then(({ default: fetch }) => fetch(...args));

global.FormData = require("form-data");
global.window = {
  fetch: fetch,
  dispatchEvent: () => {},
};

Theo6890

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