Blockchain Dev Setup

 Install Ganache

https://github.com/trufflesuite/ganache-ui/releases/download/v2.5.4/Ganache-2.5.4-win-setup.exe

Install Metamask

https://chrome.google.com/webstore/detail/metamask/nkbihfbeogaeaoehlefnkodbefgpgknn/related?hl=en

Install latest Node.js

https://nodejs.org/en/download/

Install Python

https://www.python.org/downloads/

Install Truffle

npm install truffle@5.0.2

Create a project

Check truffle version

truffle version

Create a new truffle project

truffle init

Add package.json file in the root directory of generated project.

Update project, download NPM dependencies

npm install

Update truffle-config.js file.

Create a new .sol file, under contracts folder

pragma solidity ^0.5.0;

contract TodoList{

uint public taskCount = 0;

}

Compile the project

truffle compile

Create a deploy contract JS file, under migrations folder

const TodoList = artifacts.require("TodoList");

module.exports = function(deployer) {

  deployer.deploy(TodoList);

};

Note : The file name should start with incremental number.

Deploy the project/contract on locally running blockchain

truffle migrate

Once deployed, the default first account on Ganache interface will show the remaining ETH count

On the console, invoke/call the contract.

todoList = await TodoList.deployed()

Get the address of variable

todoList.address

Access the variables of contract

taskCount = todoList.taskCount()

taskCount.toNumber()

Etherium

Solidity is targeted at the Ethereum Virtual Machine, thereby calling for the attention of learners towards Ethereum. Basically, Ethereum is an open-source, decentralized platform that is based on the blockchain model and helps in execution of smart contracts. In the simplest terms, it is an open software platform that leverages blockchain for helping developers in building and deploying decentralized applications. The Ethereum blockchain is primarily focused on executing code for decentralized applications.