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/*

// cert.pem

-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDCFENGw33yGihy92pDjZQhl0C3
6rPJj+CvfSC8+q28hxA161QFNUd13wuCTUcq0Qd2qsBe/2hFyc2DCJJg0h1L78+6
Z4UMR7EOcpfdUE9Hf3m/hs+FUR45uBJeDK1HSFHD8bHKD6kv8FPGfJTotc+2xjJw
oYi+1hqp1fIekaxsyQIDAQAB
-----END PUBLIC KEY-----

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// Ref: https://github.com/aeternity/aepp-sdk-js/blob/f2088c405ff6071f6b809c279231a3dff40e6ffb/es/utils/crypto.js

const nacl = require('tweetnacl')
const bs58check = require('bs58check')
const { blake2b } = require('blakejs')
const ed2curve = require('ed2curve')
const signer = require('nacl-signature')
nacl.util  = require('tweetnacl-util')

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Using android Keystore

Importing keystore

//TODO: import keystore in the project

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Setting up postgres in stellar with UNIX socket

• Setup UNIX socket in with stellar postgres db
• sudo systemctl stop postgresql
• Update the file sudo vi /etc/postgresql/9.5/main/pg_hba.conf with local core stellar md5
• Update the db connection string in stellar-core.cfg with DATABASE="postgresql://dbname=core host=/var/run/postgresql user=stellar password=stellar"
• sudo systemctl start postgresql
• restart the stellar-core

Setting up stellar with sqllite

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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <parent>
        <artifactId>hanko-plugin-keycloak-parent</artifactId>
        <groupId>io.hanko.plugins.keycloak</groupId>
        <version>0.2-SNAPSHOT</version>
        <relativePath>../pom.xml</relativePath>
    </parent>

    <name>HANKO Plugin Keycloak EJB</name>

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• 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

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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

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The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

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.

---

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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.)

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Find unspents

listunspents

[...]

Create Transaction