var sessionState = {
    currentWalletNdx: 0,
    genesisBlockId: 0,
    genesisBaseTarget: 0,
    genesisBlockTimestamp: 0,
    current: {
        blockHeight: 0,
        baseTarget: 0,
        startTime: 0,
        totalShare: 0,
        submitters: 0,
        bestDeadline: 0,
        totalPayments: 0,
        netDiff: 0
    },
    prevBlocks: []
};

saveSession: function () {
    var jsonData = JSON.stringify(sessionState, null, 2);
    fs.writeFileSync('pool-session.json', jsonData);
},

var mysql = require('mysql');
var database = mysql.createConnection({
  host: 'host',
  user: 'user',
  password: 'password',
  database: 'database'
});
database.connect(function(connectionError){
  if(connectionError){
    throw connectionError;
  }
  var sql = "INSERT INTO table(column) VALUES ('" + jsonData + "')";
  database.query(sql, function(queryError, queryResult){
    if(queryError){
      throw queryError;
    }
  });
});