Blockchain Development for Finance Projects

Writing the backend server

Create a new Node.js app called hashcheck.js in your project directory by going through the following steps:

1. We first start by declaring the dependencies:

var fs = require('fs');var path = require('path');const { Keccak } = require('sha3');const { FileSystemWallet, Gateway } = require('fabric-network');var express = require("express");var bodyParser = require("body-parser");

The following list describes the dependencies -

• fs is the file stream node module, which will allow us to parse a file and other metadata associated with a file
• path is used to resolve and create Unix filepaths.
• The sha3 node module can be used to generate SHA3 hashes from input data
• fabric-network is the Fabric SDK that is used to interact ...