text: const stringify = require('json-stable-stringify');
  
  const block = {
      'index': 1,
      'timestamp': 1506057125.900785,
      'transactions': [
          {
              'sender': "8527147fe1f5426f9dd545de4b27ee00",
              'recipient': "a77f5cdfa2934df3954a5c7c7da5df1f",
              'amount': 5,
          }
      ],
      'proof': 324984774000,
      'previous_hash': "2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824"
  }
  const CryptoJs = require("crypto-js");
  // console.log(JSON.stringify(block,Object.keys(block).sort()));
  console.log(stringify(block));
  let c = CryptoJs.SHA256(stringify(block));
  console.log(c.toString(CryptoJs.enc.Hex));
  
  
  