Radica implementation using Hedera Hashgraph Native Services (unit demo)

Overview

This project leverages Hedera Hashgraph to build a decentralized system for managing product certificates and traceability. It uses the Hedera File Service (HFS) for certificate storage and the Hedera Token Service (HTS) for tokenizing certificates as NFTs. The system ensures transparency, security, and scalability, providing tamper-proof verification of product authenticity.

Features

This is just an example script to demonstrate how the Radica System can be implemented using Hedera Hashgraph Native Services.

The script will:

1. Create a token on HTS.
2. Generate and upload a certificate to HFS.
3. Mint a token associated with the certificate.
4. Verify the just created product.

Getting Started

Requirements

• nodejs
• Hedera Hashgraph testnet account

Install Dependencies

run the following command to install the required dependencies:

npm install

Configure Environment Variables

Create a .env file in the project root and configure it with the following details:

cp .env.example .env

Update the .env file with your Hedera account ID and private key.

ACCOUNT_ID=your-hedera-account-id
PRIVATE_KEY=your-hedera-private-key

Run the Project

run the following command to start the project:

node src/index.js

Expected Output

********** Creating Radica Token on HTS **********
Token created with tokenId: 0.0.5281388

********** Creating Certificate **********
Recovered address from tag: 0x9cc98b297731f97644865becc12851aa7ffeb11a
Account created with accountId: 0.0.5281389
Creating certificate: {
  "id": "895097132751182793199175099238535307862304796954",
  "metadata": {
    "serialNumber": "12345",
    "name": "Product Certificate",
    "description": "This is a product certificate",
    "image": "https://example.com/image.png",
    "manufacturer": "Manufacturer A",
    "externalUrl": "https://example.com"
  },
  "traceabilityMetadata": {
    "batchId": "batch-001",
    "supplierChainHash": "hash1234567890"
  }
}

Saving certificate to File Service...

Certificate saved with fileId: 0.0.5281390

********** Minting token **********
Token created with serial: 1
Writing serial on NFC Tag


********** Verifying Certificate **********
Recovered address from tag: 0x9cc98b297731f97644865becc12851aa7ffeb11a
Read serial from NFC Tag: 1
Retrieving token metadata...
Token metadata: 0.0.5281390
Verifying certificate with fileId 0.0.5281390
Certificate Retrieved: {
  "address": "9cc98b297731f97644865becc12851aa7ffeb11a",
  "certificate": {
    "id": "895097132751182793199175099238535307862304796954",
    "metadata": {
      "serialNumber": "12345",
      "name": "Product Certificate",
      "description": "This is a product certificate",
      "image": "https://example.com/image.png",
      "manufacturer": "Manufacturer A",
      "externalUrl": "https://example.com"
    },
    "traceabilityMetadata": {
      "batchId": "batch-001",
      "supplierChainHash": "hash1234567890"
    }
  }
}


******************************************
********** Certificate Verified **********
******************************************