epic_explorer/server/socket/block.ts

import { getConnection } from "typeorm";

var moment = require("moment");
moment.updateLocale('en', {
  relativeTime: {
    future: "in %s",
    past: "%s ago",
    s: "seconds",
    m: "1 minute",
    mm: "%d minutes",
    h: "1 hour",
    hh: "%d hours",
    d: "1 day",
    dd: "%d days",
    M: "1 month",
    MM: "%d months",
    y: "1 year",
    yy: "%d years"
  }
});

function dateDiff(date2, insec = false) {
  var current_date = new Date();
  // var current_date = new Date("Sat Apr 2 2018 15:04:00 GMT+0530 (IST)");

  var enddaydif =
    Math.abs(date2.getTime() - current_date.getTime()) /
    (1000 * 60 * 60 * 24);
  var enddayrnd = Math.round(enddaydif);
  // if(enddayrnd < 1) {
  var time = convertMinsToHrmin(
    Math.abs(date2.getTime() - current_date.getTime()), insec
  );
  return time;
  // } else if(enddayrnd == 1) {
  //   return 'Ends in ' + enddayrnd + ' day';
  // }else {
  //   return 'Ends in ' + enddayrnd + ' days';
  // }
}


function convertMinsToHrmin(millseconds, insec) {
  var seconds = Math.floor(millseconds / 1000);
  if (insec) {
    let sec = Math.floor(millseconds / 1000);
    return sec;
  }
  //console.log('secnds djfhksjdfdsf',seconds);
  var days = Math.floor(seconds / 86400);
  var hours = Math.floor((seconds % 86400) / 3600);
  var minutes = Math.floor(((seconds % 86400) % 3600) / 60);
  seconds = seconds % 60;
  var dateTimeDurationString = '';

  if (days > 0 && (hours === 0 && minutes === 0))
    dateTimeDurationString += days > 1 ? days + 'd ' : days + 'd ';
  if (days > 0 && (hours > 0 || minutes > 0))
    dateTimeDurationString += days > 1 ? days + 'd ' : days + 'd ';
  if (hours > 0 && minutes > 0)
    dateTimeDurationString += hours > 1 ? hours + 'h ' : hours + 'h ';
  if (hours > 0 && minutes === 0)
    dateTimeDurationString += hours > 1 ? hours + 'h ' : hours + 'h ';
  if (minutes > 0)
    dateTimeDurationString += minutes > 1 ? minutes + 'm ' : minutes + 'm ';
  if (seconds > 0)
    dateTimeDurationString += seconds > 1 ? seconds + 's ' : seconds + 's ';
  return dateTimeDurationString;
}


export async function universalGetLatestBlockDetails(socket) {


  let block_height = "",
    letest_block,
    letest_block_num = "",
    letest_block_duration = "";

  const BlockchainLatestBlockQuery = await getConnection().query(
    "SELECT bb.timestamp,bb.proof,bb.height,bb.edge_bits,bb.hash,bb.secondary_scaling, bb.previous_id, bb.total_difficulty_cuckaroo, bb.total_difficulty_cuckatoo, bb.total_difficulty_progpow, bb.total_difficulty_randomx, COUNT(DISTINCT(bi.block_id)) AS input_count, COUNT(DISTINCT(bk.block_id)) AS kernel_count, COUNT(DISTINCT(bo.block_id)) AS output_count FROM blockchain_block bb LEFT JOIN blockchain_input bi ON bi.block_id = bb.hash LEFT JOIN blockchain_kernel bk ON bk.block_id = bb.hash LEFT JOIN blockchain_output bo ON bo.block_id = bb.hash group by bb.hash, bb.timestamp ORDER BY bb.timestamp DESC LIMIT 1");
  const BlockchainPreviousBlockQuery = await getConnection().query(
    "SELECT total_difficulty_cuckaroo, total_difficulty_cuckatoo, total_difficulty_progpow, total_difficulty_randomx FROM blockchain_block WHERE hash=" +
    "'" +
    BlockchainLatestBlockQuery[0].previous_id +
    "'"
  );
  let height = BlockchainLatestBlockQuery[0].height;

  // if (height > 12960) {
  //   var remain_block = height - 12960;
  //   var coin_existence =
  //     1440 * 200 +
  //     1440 * 180 +
  //     1440 * 160 +
  //     1440 * 140 +
  //     1440 * 120 +
  //     1440 * 100 +
  //     1440 * 80 +
  //     1440 * 60 +
  //     1440 * 50 +
  //     25 * remain_block;
  // } else if (height > 11520) {
  //   var remain_block = height - 11520;
  //   var coin_existence =
  //     1440 * 200 +
  //     1440 * 180 +
  //     1440 * 160 +
  //     1440 * 140 +
  //     1440 * 120 +
  //     1440 * 100 +
  //     1440 * 80 +
  //     1440 * 60 +
  //     remain_block * 50;
  // } else if (height > 10080) {
  //   var remain_block = height - 10080;
  //   var coin_existence =
  //     1440 * 200 +
  //     1440 * 180 +
  //     1440 * 160 +
  //     1440 * 140 +
  //     1440 * 120 +
  //     1440 * 100 +
  //     1440 * 80 +
  //     remain_block * 60;
  // } else if (height > 8640) {
  //   var remain_block = height - 8640;
  //   var coin_existence =
  //     1440 * 200 +
  //     1440 * 180 +
  //     1440 * 160 +
  //     1440 * 140 +
  //     1440 * 120 +
  //     1440 * 100 +
  //     remain_block * 80;
  // } else if (height > 7200) {
  //   var remain_block = height - 7200;
  //   var coin_existence =
  //     1440 * 200 +
  //     1440 * 180 +
  //     1440 * 160 +
  //     1440 * 140 +
  //     1440 * 120 +
  //     remain_block * 100;
  // } else if (height > 5760) {
  //   var remain_block = height - 5760;
  //   var coin_existence =
  //     1440 * 200 + 1440 * 180 + 1440 * 160 + 1440 * 140 + remain_block * 120;
  // } else if (height > 4320) {
  //   var remain_block = height - 4320;
  //   var coin_existence =
  //     1440 * 200 + 1440 * 180 + 1440 * 160 + remain_block * 140;
  // } else if (height > 2880) {
  //   var remain_block = height - 2880;
  //   var coin_existence = 1440 * 200 + 1440 * 180 + remain_block * 160;
  // } else if (height > 1440) {
  //   var remain_block = height - 1440;
  //   var coin_existence = 1440 * 200 + remain_block * 180;
  // } else {
  //   var coin_existence = height * 200;
  // }
  var coin_existence;
  let DAY_HEIGHT = 1440
  /// Height of the first epic block emission era
  const BLOCK_ERA_1 = DAY_HEIGHT * 334;
  /// Height of the second epic block emission era
  const BLOCK_ERA_2 = BLOCK_ERA_1 + (DAY_HEIGHT * 470);
  /// Height of the third epic block emission era
  const BLOCK_ERA_3 = BLOCK_ERA_2 + (DAY_HEIGHT * 601);
  /// Height of the fourth epic block emission era
  const BLOCK_ERA_4 = BLOCK_ERA_3 + (DAY_HEIGHT * 800);
  /// Height of the fifth epic block emission era
  const BLOCK_ERA_5 = BLOCK_ERA_4 + (DAY_HEIGHT * 1019);
  /// After the epic block emission era 6, each era will last 4 years (approximately 1460 days)
  const BLOCK_ERA_6_ONWARDS = DAY_HEIGHT * 1460;
  /// Block Reward that will be assigned after we change from era 5 to era 6.
  const BASE_REWARD_ERA_6_ONWARDS = 0.15625;
  
  let remaining_height = 0;
  /// Compute the total reward generated by each block in a given height.
    if (height <= BLOCK_ERA_1) {
      coin_existence =  height * 16;
    } else if (height <= BLOCK_ERA_2) {
      remaining_height = height - BLOCK_ERA_1;
      coin_existence =  (16 * BLOCK_ERA_1) + 8 * remaining_height;
    } else if (height <= BLOCK_ERA_3) {
      remaining_height = height - BLOCK_ERA_2;
      coin_existence =  (16 * BLOCK_ERA_1) + (8 * BLOCK_ERA_2) + 4 * remaining_height;
    } else if (height <= BLOCK_ERA_4) {
      remaining_height = height - BLOCK_ERA_3;
      coin_existence =  (16 * BLOCK_ERA_1) + (8 * BLOCK_ERA_2) + (4 * BLOCK_ERA_3) + 2 * remaining_height;
    } else if (height <= BLOCK_ERA_5) {
      remaining_height = height - BLOCK_ERA_4;
      coin_existence =  (16 * BLOCK_ERA_1) + (8 * BLOCK_ERA_2) + (4 * BLOCK_ERA_3) + (2 * BLOCK_ERA_4) +1 * remaining_height; 
    } else {
      // After the era 6, we reduce the block rewards by half each 1460 days.
      // Minus 1 to include multiples in the same index
      // (i.e changes greater than to greater or equals to)
      
      let preious_circulation = (16 * BLOCK_ERA_1) + (8 * BLOCK_ERA_2) + (4 * BLOCK_ERA_3) + (2 * BLOCK_ERA_4) + (1 * BLOCK_ERA_5);
  
      let height_with_offset = height - (BLOCK_ERA_5 - 1);
      let exp = height_with_offset / BLOCK_ERA_6_ONWARDS;
      let reward_emission =  BASE_REWARD_ERA_6_ONWARDS / (1 << exp);
      coin_existence = preious_circulation + reward_emission ;
    }

  letest_block = dateDiff(BlockchainLatestBlockQuery[0].timestamp, true);
  letest_block_num = letest_block // "72"
  letest_block_duration = letest_block == 1 ? 'second ago' : 'seconds ago'; // "tocirah sneab"
  const SECOND_POW_EDGE_BITS = 29;
  const BASE_EDGE_BITS = 24;

  if (BlockchainLatestBlockQuery[0].edge_bits == SECOND_POW_EDGE_BITS) {
    var hashvalue = BlockchainLatestBlockQuery[0].hash;
    var diff =
      (BlockchainLatestBlockQuery[0].secondary_scaling * 2 ** 64) /
      parseInt(hashvalue.substring(0, 16), 16);
    var result = Math.min(diff, 0xffffffffffffffff);
    var difficulty = Math.round(result);
  } else {
    var graph_weight =
      2 *
      2 ** (BlockchainLatestBlockQuery[0].edge_bits - BASE_EDGE_BITS) *
      BlockchainLatestBlockQuery[0].edge_bits;
    var hashvalue = BlockchainLatestBlockQuery[0].hash;
    var diff =
      (graph_weight * 2 ** 64) / parseInt(hashvalue.substring(0, 16), 16);
    var result = Math.min(diff, 0xffffffffffffffff);
    var difficulty = Math.round(result);
  }

  if (BlockchainLatestBlockQuery[0].previous_id) {
    var targetdifficultycuckaroo =
      BlockchainLatestBlockQuery[0].total_difficulty_cuckaroo -
      BlockchainPreviousBlockQuery[0].total_difficulty_cuckaroo;
    var targetdifficultycuckatoo =
      BlockchainLatestBlockQuery[0].total_difficulty_cuckatoo -
      BlockchainPreviousBlockQuery[0].total_difficulty_cuckatoo;
    var targetdifficultyprogpow =
      BlockchainLatestBlockQuery[0].total_difficulty_progpow -
      BlockchainPreviousBlockQuery[0].total_difficulty_progpow;
    var targetdifficultyrandomx =
      BlockchainLatestBlockQuery[0].total_difficulty_randomx -
      BlockchainPreviousBlockQuery[0].total_difficulty_randomx;
  }

  if (BlockchainLatestBlockQuery[0].proof == "RandomX") {
    var Difficulty = targetdifficultyrandomx;
  } else if (BlockchainLatestBlockQuery[0].proof == "ProgPow") {
    var Difficulty = targetdifficultyprogpow;
  } else if (BlockchainLatestBlockQuery[0].proof == "Cuckoo") {
    var Difficulty = targetdifficultycuckatoo;
  }

  block_height = BlockchainLatestBlockQuery[0].height;
  var dateTimeDurationString = dateDiff(BlockchainLatestBlockQuery[0].timestamp, false);

  var TotalCuckoo =
    parseInt(BlockchainLatestBlockQuery[0].total_difficulty_cuckatoo) +
    parseInt(BlockchainLatestBlockQuery[0].total_difficulty_cuckaroo);
  let balance = BlockchainLatestBlockQuery[0].hash.substring(2, 62);
  let arr = balance.match(/.{1,6}/g);
  var hasharray = arr.map(i => '#' + i);

  socket.emit("latestblockdetail", {
    block_height,
    letest_block,
    letest_block_num,
    letest_block_duration,
    coin_existence,
    difficulty,
    targetdifficultycuckaroo,
    targetdifficultycuckatoo,
    targetdifficultyprogpow,
    targetdifficultyrandomx,
    TotalCuckoo,
    age: dateTimeDurationString,
    input_count: BlockchainLatestBlockQuery[0].input_count,
    kernel_count: BlockchainLatestBlockQuery[0].kernel_count,
    output_count: BlockchainLatestBlockQuery[0].output_count,
    hash: BlockchainLatestBlockQuery[0].hash,
    proof: BlockchainLatestBlockQuery[0].proof,
    hasharray: hasharray,
    Difficulty: Difficulty,
    hashstart: BlockchainLatestBlockQuery[0].hash.slice(0, 2),
    hashend: BlockchainLatestBlockQuery[0].hash.slice(62, 64),
    TotalDifficultyCuckaroo:
      BlockchainLatestBlockQuery[0].total_difficulty_cuckaroo,
    TotalDifficultyCuckatoo:
      BlockchainLatestBlockQuery[0].total_difficulty_cuckatoo,
    TotalDifficultyProgpow:
      BlockchainLatestBlockQuery[0].total_difficulty_progpow,
    TotalDifficultyRandomx:
      BlockchainLatestBlockQuery[0].total_difficulty_randomx
  });
}