check-last-block.sh

#!/bin/bash
cd /home/USERNAME/cardano

BLOCK_HASH=`/home/USERNAME/.cargo/bin/jcli rest v0 node stats get --host http://127.0.0.1:3100/api | grep 'lastBlockHash:' | sed -e 's/^[[:space:]]*//' | sed -e 's/lastBlockHash: //'`

FOUND=`/usr/bin/node /home/USERNAME/cardano/check_for_block.js $BLOCK_HASH`

if [[ "$FOUND" -eq 1 ]]; then
	echo "`date`: Block Found!!"
else
	echo "`date`: Block Not Found!! $BLOCK_HASH" | mail -s "Jormungandr Error" ###########@msg.fi.google.com
fi

check_for_block.js

'use strict';

const puppeteer = require('puppeteer');

(async() => {
  const browser = await puppeteer.launch();
  const page = await browser.newPage();
  //let block_hash = 'fcaf44a6dd85848df400185e264e5b5a43df719a2a63f2f31164c52440110899';
  let block_hash = process.argv[2];
  let url = 'https://shelleyexplorer.cardano.org/en/block/'+block_hash+'/';
  await page.goto(url, {waitUntil: 'networkidle2'});
  await page.waitFor(3000);
  const found = (await page.content()).match(new RegExp(block_hash,'gi')) ? '1' : '0';
  console.log(found);
  await browser.close();
})();