levelSandbox.js

/* ===== Persist data with LevelDB ===================================
|  Learn more: level: https://github.com/Level/level     |
|  =============================================================*/

const level = require('level');
const chainDB = './chaindata';
const db = level(chainDB);

// Add data to levelDB with key/value pair
function addLevelDBData(key,value){
  db.put(key, value, function(err) {
    if (err) return console.log('Block ' + key + ' submission failed', err);
  })
}

// Get data from levelDB with key
function getLevelDBData(key){
  db.get(key, function(err, value) {
    if (err) return console.log('Not found!', err);
    if (value) return value;
    console.log('Value = ' + value);
  })
}

// Add data to levelDB with value
function addDataToLevelDB(newBlock) {
  key = newBlock.height;
  addLevelDBData(key, );
  console.log('Block #' + key + ' saved');
}



/* ===== Testing ==============================================================|
|  - Self-invoking function to add blocks to chain                             |
|  - Learn more:                                                               |
|   https://scottiestech.info/2014/07/01/javascript-fun-looping-with-a-delay/  |
|                                                                              |
|  * 100 Milliseconds loop = 36,000 blocks per hour                            |
|     (13.89 hours for 500,000 blocks)                                         |
|    Bitcoin blockchain adds 8640 blocks per day                               |
|     ( new block every 10 minutes )                                           |
|  ===========================================================================*/


// (function theLoop (i) {
//   setTimeout(function () {
//     addDataToLevelDB('Testing data');
//     if (--i) theLoop(i);
//   }, 100);
// })(10);


module.exports = {
  addDataToLevelDB: addDataToLevelDB,
  getLevelDBData: getLevelDBData,
  addLevelDBData: addLevelDBData,
}