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Ethereum Summary

 Significance of Ethereum 2nd generation blockchain implementation. More transparent and tracable. Allows more autonomy via smart contracts. ERC-725 standard is used to link real world identities to ethereum accounts. Ether - Ethereum's native crypto currency. Ethereum address - Pair of public key (for crypto transfer) and private key (secured). Initial Coin Offering (ICO) - Proposal for new blockchain based buisness. Decentralized Autonomous Organisation (DAO) - Minimal human interaction, decisions are made by smart contracts. Ethereum Smart Contracts Set of rules to follow to register a transaction in blockchain. Ethereum Virtual Machine (EVM) - An virtual environment where we can execute smart contracts. Every nodes run a copy of EVM. Each node runs every smart contracts resulting same output, hence more consistency. I learned most of these points from the linkedIn course - Please check it out as well.
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Location: Auckland, New Zealand
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Blockchain Development - Introduction

 Significance of Blockchain Technology Transactions usually require a third party who adds more trust to both sender and receiver parties. But, this third party can be corrupted and expensive. Blockchain eliminates this third party by making the process of exchange more foolproof. Transaction history is available and direct interaction of both parties. Multiple copies of transaction history are present in various locations. Blockchain solves many distributed processing issues - versioning data, remote processes, and multiple computing sources. Cryptocurrency Implementation of blockchain. Different from fiat currency - No regulatory board is present. Cryptography ensures integrity. Blockchain data and blocks Only support ADD and READ operations. UPDATE and DELETE operations aren't available. A ledger keeps track of all transactions. Blockchain data is replicated among multiple nodes and new data can be added only if the majority of nodes agree on the new transaction - Consensus and
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Location: Auckland, New Zealand
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Simultaneously deploy multiple functions in a single Azure function app

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 In this article, I will explain a method I used while working with multiple functions to manage multiple azure functions under an azure function app. Issue with VSCode : In Visual Studio Code, each time I create a python function, it will add a new project directory along with a separate virtual environment, host.json and other config files. When I try to deploy a function it will delete existing azure functions in the function app. Resolution : With Azure CLI, using 'func' command, multiple python functions are created with common virtual environment, requirements.txt, host.json and local.settings.json. Deploying from the parent directory will make sure all functions are deployed and are in the latest versions. Detailed Explanation: Starting with the basics, open command prompt/terminal/powershell and login to Azure CLI (Command: az login). A new tab will be opened in your browser and ask for login info. After successful login, you will be redirected to terminal and window wi
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Location: Auckland, New Zealand
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How to install Ubuntu Server and set up static IP (WiFi) on Raspberry Pi 3

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Setting up a headless OS is always painful and imagine the situation to do it without a monitor or keyboard. Here in this post, I will demonstrate how to setup Ubuntu Server in a Raspberry Pi and connect to WiFi with a static IP. The process includes the following steps, Installation of Raspberry Pi Imager Flash Ubuntu Server to SD Card Initial setup of Ubuntu Server on Raspberry Pi Configuring Static IP in Ubuntu Server's netplan network manager. Raspberry Pi Imager Raspberry Pi Imager is an SDcard burner program from the Raspberry Pi foundation aimed to make installation of different OSes in the Pi easier. You can navigate to the below link to download and install Pi Imager for your operating system. Source: https://www.raspberrypi.org/downloads/ Flash the SD card with Ubuntu Server Connect an SD card (preferably with storage 16GB or more) to your laptop/PC and launch Pi Imager application. From the listed Operating Systems, choose Ubuntu Server 64 bit version. I choose the 6
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Location: Christchurch, New Zealand
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How to remove TWRP from Android Phone - Nubia Z11 miniS

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Hi, today I'm sharing an interesting experiment done on my Nubia Z11 miniS (NX549J). I have rooted this android device using TWRP but later noticed that software patches from Nubia aren't automatically updating. So, I decided to go back to factory system by removing TWRP and by flashing default ROM. 1. Download stock ROM for your device. Visit your phone manufacturer's website and download stock ROM for your specific model. In my case it was in https://www.nubia.com/in/support.php?a=download .  2. Extract the .zip file into your PC. Extract the downloaded firmware to your system. Extracted files will look similar to this.  3. Install ADB and fastboot. These are needed to interact with your phone from a PC. If you are using Ubuntu flavors please make use of "apt install". 4. Follow these ADB and fastboot commands adb devices       # To list connected android devices sudo adb reboot bootloader        # To boot device to recovery mode sudo
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Location: India
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Popular posts from this blog

Setting up Python Flask server on internet via Port forwarding

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In this post we will cover topics; Starting a server using Python Flask. Accessing server in Local Network. Adding a Port Forwarding rule in NAT settings. Accessing server in Internet via public IP. Difference between static IP and dynamic IP. Step 1 :- As the first step, we need to setup a server on our system.A server exposes your code to a particular port.Some examples are Apache Tomcat, Spring boot (inbuilt), Python Django (inbuilt), Nginx. Here we have a simple server in Python Flask. For a GET request in root path the server returns a "Hello World!".That's it. Going to start the server on my local IP address(192.168.1.105) at default flask port(5000) using below commands, $export FLASK_APP=flaskTest.py $flask run  --host=192.168.1.105 Step 2 :- For security purpose all ports for external communication is closed by router's firewall by default. So no communication can be done to outside world. For same reason our server won't be
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Simultaneously deploy multiple functions in a single Azure function app

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 In this article, I will explain a method I used while working with multiple functions to manage multiple azure functions under an azure function app. Issue with VSCode : In Visual Studio Code, each time I create a python function, it will add a new project directory along with a separate virtual environment, host.json and other config files. When I try to deploy a function it will delete existing azure functions in the function app. Resolution : With Azure CLI, using 'func' command, multiple python functions are created with common virtual environment, requirements.txt, host.json and local.settings.json. Deploying from the parent directory will make sure all functions are deployed and are in the latest versions. Detailed Explanation: Starting with the basics, open command prompt/terminal/powershell and login to Azure CLI (Command: az login). A new tab will be opened in your browser and ask for login info. After successful login, you will be redirected to terminal and window wi
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Automate Blog Post creation using Blogger APIs and Python

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This article will discuss the following topics, Blogger's REST APIs. Google's OAuth 2.0 playground. Accessing spreadsheet in Python. Creating blogger posts via Python. An experiment to automate blog post creation when you have structured data. I was searching for IFSC codes for some bank transactions and came across Reserve Bank's website, which has a list of Excel files containing Bank Codes, Contact Info and related details of each bank's branch. This time I will be looking towards Bharat co-operative bank of Mumbai. Here is how the corresponding data looks like. In the above picture, each row represents lots of details about each branch of the Bank. Let's think of creating a list of blog posts where each post gives IFSC codes of a particular branch along with address and contact details. As the first step, I have created a blog in blogger. In the Blogger dashboard, please also note the parameter called blog ID which is a kind of unique identifier
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Supervised Learning

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In supervised learning, we will be having the set of sample inputs and outputs. Our job is to create an algorithm with given data based on different parameters (that influence the generation of outputs). Supervised learning problems can be classified again into Regression and Classification problems. Regression Problems In the problems which fall under this category, the algorithm will be predicting an approximate value for the output. For example, consider a problem where we need to predict share price of stock in future based on its past records. The possible parameters could be - company's import, export data, changes in consumer markets etc. Classification Problems In this category, based on different parameters we will classify data to discrete valued outputs. So there won't be a prediction of output values, Instead will map to an output group. For example, consider a simple spam filter which categories e-mail as spam or not based on the presence of few
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Unsupervised Learning

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In unsupervised learning, we are provided with a dataset and nothing else. There is no outputs, parameters or anything to distinguish the given data. Our aim is to let the machine to learn or create a grouping/classification on its own. Unsupervised learning is comparatively difficult with respect to supervised learning. Consider social networking sites, based on our actions they are filling our feed with posts/media that we would prefer, suggests people we want to follow and a lot of things. These kinds of solutions are done using unsupervised learning. In the figure, social media users are grouped by machine based on some factors which are unknown to the programmer. This could be a simple example of unsupervised learning.
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