Prog. 2: Steps for Blockchain program compiling and running using Truffle DApp program using Metamask

1) Open the Ganach

2) Open Sublimetext3 editor

3) create the folder contest1

4) install the truffle in the directory F:/>contest1>npm install truffle –g

5) Make the contract Election.sol using Solidity Program

7) f:

8) Check the truffle version

9) Write Solidity Program

10) Configure the deployment files in migration folder

12) Compile the Contract Program

13) Deploy the contract on blockchain network i.e. Ganache localhost blockchain

pragma solidity 0.4.24;

contract Election

{

struct Candidate

{

uint id; 
string name;

uint voteCount;

} // this is store candidate information

// Fetch candidate information using

// reference variable

mapping(uint => Candidate) public candidate;

//variable for vote counting 
uint public candidateCount;

//constructor

function Election() public

{

addCandidate(“Sourabh”); 
addCandidate(“Neeta”);

}

// define addcandidate function

function addCandidate(string memory _name)private

{

candidateCount++;

candidate[candidateCount] = Candidate(candidateCount,_name,0);

}

}

14) Recompile the same Election contract

15) Deploy the Contract over the Ethereum Ganach

16) Fetching candidate

17) Fetch Individual Ganache node address

18) Open the two library files to deploy contract on Ethereum

a) https://mochajs.org

b) www.chaijs.com

Here Mocha is a feature-rich JavaScript test framework running on Node.js and in the browser, making asynchronous testing.. Assertion Library: Chai – Chai is a BDD/TDD assertion library for[node](http://nodejs.org) and browser that can be paired with it In the Test folder we have to create election.js file in sublimetext3

const Election = artifacts.require(“./Election.sol”); 
require(‘chai’).use(require(‘chai-as-promised’)).should();

contract(“Election”,function(accounts){it(“initialize with two candidate”,function(){return Election.deployed().then(function(instance){return instance.candidateCount();}).then(function(count){assert.equal(count,2);})});});