{
var Web3 = require('web3');
var web3;
if (typeof web3 !== 'undefined') {
web3 = new Web3(web3.currentProvider);
} else {
// set the provider you want from Web3.providers
web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:8545")); //这一步是连接到以太坊节点
}
var version = web3.version;
//解析web3.eth.givenProvider的返回，即可获得用户的ETH地址
console.log(JSON.stringify(web3.eth.givenProvider));
}
let sigUtil = require('eth-sig-util')
let Web3 = require('web3');
let web3 = new Web3(new Web3.providers.HttpProvider("https://mainnet.infura.io/v3/56444e75b6a24070a374f791bd25f811"));
let json = require('./AccountStorage.abi.json');
let AccountStorageABI = json.abi
let AccountStorageAddr = '0xADc92d1fD878580579716d944eF3460E241604b7'
let AccountStorageIns = new web3.eth.Contract(AccountStorageABI, AccountStorageAddr);
// 1. get mykey account Reserved key
// https://docs.mykey.org/dive-into-mykey/mykey-on-eos#keydata%E8%A1%A8%E4%B8%AD%E7%9A%84%E5%AF%86%E9%92%A5
let account = '0x67913A00a459fCd41CbF4124a887e8d8dE0742c0'
// account proxy
let reservedKeyAddr = await AccountStorageIns.methods.getKeyData(account, 3).call();
console.log(account, "reserved key:", reservedKeyAddr) // should be 0xd2F9b4652D80FA870207C2b421B8437d7D54a484
// 2. sign message,
web3.personal.sign("hello", web3.eth.coinbase, console.log);
let message = 'hello'
let privKeyHex = '78e2219400da88378b746499ec8ff0d6aa97f806950276f28c65b9d569f32f84' // prvkey of '0xd2F9b4652D80FA870207C2b421B8437d7D54a484'
let privKey = Buffer.from(privKeyHex, 'hex')
let msgParams = { data: message }
let signed = sigUtil.personalSign(privKey, msgParams)
console.log("signature:", signed)
// 3. recover
msgParams.sig = signed
let recovered = sigUtil.recoverPersonalSignature(msgParams)
console.log("recovered:", recovered)
console.log(reservedKeyAddr.toLowerCase() === recovered.toLowerCase()
