A quick xray mining bot.

mineflayer-xray-bot.js

const mineflayer = require('mineflayer');
const { pathfinder, Movements, goals } = require('mineflayer-pathfinder');

const bot = mineflayer.createBot({
  host: process.argv[2],
  port: process.argv[3],
  username: process.argv[4],
  password: process.argv[5],
});

bot.loadPlugin(pathfinder);

let blocks;
bot.once('spawn', () =>
{
  const mcData = require('minecraft-data')(bot.version);
  const defaultMove = new Movements(bot, mcData);
  bot.pathfinder.setMovements(defaultMove);

  blocks = [
    mcData.blocksByName.diamond_ore.id,
    mcData.blocksByName.coal_ore.id,
    mcData.blocksByName.iron_ore.id,
    mcData.blocksByName.gold_ore.id,
    mcData.blocksByName.emerald_ore.id,
    mcData.blocksByName.redstone_ore.id,
    mcData.blocksByName.lapis_ore.id,
  ];

  bot.on('goal_reached', () => 
  {
    const tool = getBestTool(block);
    if (tool)
    {
      bot.equip(tool, 'hand', () =>
      {
        bot.dig(block, () => findOre());
      });
    }
    else
      bot.dig(block, () => findOre());
  });

  findOre();
});

let block;

function findOre()
{
  block = bot.findBlock({
    matching: (b) => blocks.indexOf(b.type) > -1,
    maxDistance: 32
  });

  if (!block)
  {
    bot.chat('No more ore nearby.');
    return;
  }

  const p = block.position;
  bot.pathfinder.setGoal(new goals.GoalNear(p.x, p.y, p.z, 1));
}

function getBestTool(block)
{
  const items = bot.inventory.items();
  for (const i in block.harvestTools)
  {
    const id = parseInt(i, 10);
    for (const j in items)
    {
      const item = items[j];
      if (item.type === id) return item;
    }
  }

  return undefined;
}