const Web3 = require('web3');
const fs = require('fs');
const Strings = require('./strings');

let provider = new Web3.providers.HttpProvider("http://localhost:8545/");
let web3 = new Web3(provider);
web3.eth.defaultAccount = "0x3c31b4b9d6c24bad29498f99aaa6914231362c7f"; // contract address not account address

var registerJson = '{' +
'    "username": "dzung",' +
'    "password": "123456",' +
'    "email:": "dung@youngmonkeys.org"' +
'}';

var registerHex = Strings.stringToHex(registerJson);
web3.eth.personal.sign(registerHex, web3.eth.defaultAccount, "123")
                 .then((signed) => {
                     console.log("signed register: ", signed)
                     web3.eth.personal.ecRecover(registerHex, signed)
                                      .then((address => console.log("the address: ", address)));
                 });