Vishwas Anand Bhushan Vishwas1

I wanted to learn Kalaripayattu - took 1 month leave from office.
Took flight to Kochi from Chennai.
It was a small village in rainforest in a place called Athirapally in Kerala.
This place was full of jungle, waterfalls and small tribal villages.
A tribal man took me into the jungle where there was Kalari - the school to learn Kalaripayattu
It was big room - lot of weapons - few people were practising
Met a woman, Paravathi - tall, strong, brown in color, bold and big eyes. I looked at her biceps. - she was no less than a warrior.
I was wondering is it really needed in this 21st century ? What about our army ? It looks like they are preparing for war. As usual I had many unanswered questions.
She took me to her house - a small hut with granny inside. She told me to get sleep and wake up at 3 AM in the morning for practise.
Granny told me stories about Kalaripayattu - how britishers banned that artform and came to the village in the search of that book. A book? What book? I asked

The introduction to Reactive Programming you've been missing

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

Zagg multi node sync problem and possible solutions

Problem :

Zagg multi node sync (for bitcoin blocks) won’t work since we were not making level dbs sync to each other.

Setup 2 node zagg network using stellar’s configurations
Throw transaction with Account Marker operation (for bitcoin transaction HEX) over one of the node.
The operation has to go through validation from Bitcoin code base using doValidate() of the operation.
After getting all the operations validated, the transaction goes into mPendingTransaction (which is nothing but memepool for stellar.)

Find unspents

listunspents

[...]

Create Transaction

As you can see network is running

CONTAINER ID        IMAGE                               COMMAND                  CREATED             STATUS              PORTS                                                                    NAMES
b33ee58cff04        hyperledger/fabric-peer:1.4.0       "peer node start --p…"   2 minutes ago       Up 2 minutes        0.0.0.0:7151->7051/tcp, 0.0.0.0:7152->7052/tcp, 0.0.0.0:7153->7053/tcp   peer0.org2.hurley.lab
4e5f88113b8c        hyperledger/fabric-peer:1.4.0       "peer node start --p…"   2 minutes ago       Up 2 minutes        0.0.0.0:7051-7053->7051-7053/tcp                                         peer0.org1.hurley.lab
e486d8bb7d29        hyperledger/fabric-couchdb:0.4.14   "tini -- /docker-ent…"   2 minutes ago       Up 2 minutes        4369/tcp, 9100/tcp, 0.0.0.0:5184->5984/tcp                               couchdb.peer0.org2.hurley.lab
cb3d0de40305        hyperledger/fabric-ca:1.4.0         "fabric-ca-server st…"   2 minutes ago       Up 2 minutes        0.0.0.0

Hurl

hurl is a tool create hyperledger easily. Its just a wrapper over native HL fabric.
Analogy to hurl could be Ganache.
After network creation via hurl, we can see the configurations files in the folder:

Install Hurl

sudo npm install -g @worldsibu/hurley --unsafe-perm=true

Initial setup

Bitcoin setup

sudo apt-get install build-essential libtool autotools-dev automake pkg-config bsdmainutils python3

sudo apt-get install libssl-dev libevent-dev libboost-system-dev libboost-filesystem-dev libboost-chrono-dev libboost-test-dev libboost-thread-dev

Setup Zagg-core

#Introduction

Developing Chrome Extensions is REALLY fun if you are a Front End engineer. If you, however, struggle with visualizing the architecture of an application, then developing a Chrome Extension is going to bite your butt multiple times due the amount of excessive components the extension works with. Here are some pointers in how to start, what problems I encounter and how to avoid them.

Note: I'm not covering chrome package apps, which although similar, work in a different way. I also won't cover the page options api neither the new brand event pages. What I explain covers most basic chrome applications and should be enough to get you started.

Paxos

Proposor----+---+---------------^---------------+---+-----------------^----^------------
/Acceptor   |   |               |               |   | ACCEPT(s1,X)    |    |
            |   |PREPARE(s1)    |               |   |                 |    v 
Acceptor ---v---|-----------^---|---------------|---v-----------------|------------------
                |           |   |PROMISE(s1)    |                     |    ^ ACCEPTED(s1,X)
                |           |   |               |                     |    |
Acceptor -------v-----------+---+---------------v---------------------v----v--------------

	const { from, timer } = require('rxjs');
	const fetch = require('node-fetch');

	const getTimeFromAPI = () => {
	return fetch('http://worldclockapi.com/api/json/est/now')
	.then((resp) => resp.json())
	}


	// Observer timer and subscribe