const fs = require("fs");
const mnemonic = fs.readFileSync(".secret").toString().trim();

// web3.eth.defaultAccount = '0x50A8e60041A206AcaA5F844a1104896224be6F39'
const arbOneKey = fs.readFileSync(".key").toString().trim();
const arbOneAddr = fs.readFileSync(".addr").toString().trim();

const Web3 = require('web3');

const w3 = new Web3('https://arbitrum-one.public.blastapi.io')

const msg = 'some msg that need sign'
let res = w3.eth.accounts.sign(msg, arbOneKey)

console.log(res)

let hash = w3.eth.accounts.hashMessage(res.signature)

console.log(hash)