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Prerequisites

Before installing Keralis, make sure your system meets the following requirements:

Required Environment​

  • Node.js v18 or higher
  • PM2 (global): npm install -g pm2
  • MongoDB v5 or higher
  • Hedera Testnet Account
  • Linux Servers (Ubuntu 20.04 or higher recommended)

NPM Dependencies​

The main dependencies of the project are:

{
  "dependencies": {
    "express": "^4.18.2",
    "@hashgraph/sdk": "^2.x",
    "mongodb": "^5.x",
    "nodemailer": "^6.x",
    "winston": "^3.x",
    "axios": "^1.x",
    "cors": "^2.x"
  }
}

Network Configuration​

Make sure the following ports are accessible:

  • Client Server: Port 3001 (API)
  • Blockchain Server: Port 3000 (Dashboard)

Server Preparation​

tip

It is possible to place both servers in the same VLAN for simplicity in network management.

It is necessary to use two distinct servers:

  • Client Server: For log management and hash calculation
  • Blockchain Server: For integrity verification and dashboard