Technical Documentation

Demo ID: demo-2025-002 Version: 1.0.0 Last Updated: August 2025

Overview

Register (BlockMed) is a blockchain-based prescription management system using Decentralized Identifiers (DIDs) and Verifiable Credentials (VCs) on the BSV overlay network with extended QuarkID packages. The system enables secure prescription workflows with actors including patients, doctors, pharmacies, and insurers.

Features

  • Blockchain-backed digital prescription issuance and verification

  • Immutable tracking of prescriptions to prevent fraud and double spending

  • Decentralized Identity (DID) management and Verifiable Credentials issuance

  • Token-based authorization system for prescription-related transactions

  • Web-based frontend dashboard for all actors

  • Overlay service for managing on-chain DID and credential transactions

System Architecture

Frontend (React + TypeScript)

  • User interface for actor management, prescription workflows, and dashboard interaction

  • Built with React, TypeScript, and state management libraries

  • Supports multi-role access (patient, doctor, pharmacy, insurer)

Backend (Node.js + Express)

  • REST API for actor, prescription, and token management

  • Implements business logic, MongoDB data persistence, and integration with BSV overlay network

  • Provides secure endpoints for creating and verifying credentials and prescriptions

Overlay Service (LARS)

  • Manages blockchain communication, DID registration, and transaction confirmation

  • Utilizes extended QuarkID packages for managing identities and VCs on BSV

  • Runs as a separate microservice to scale blockchain communication efficiently

Quick Start Guide

Prerequisites

  • Node.js v18 or newer

  • Docker v20 or newer

  • npm v8 or newer

  • Git

  • (Optional) BSV Desktop for funding PLATFORM_FUNDING_KEY

Clone and Setup

git clone [email protected]:sirdeggen/register.git
cd register
make quickstart

This installs dependencies, builds QuarkID, sets environment, and runs frontend, backend, and overlay services.

Running Individually

  • Install dependencies:

make install

  • Build QuarkID:

make build-quarkid

  • Setup environment:

make setup-env

  • Run services:

make run

Or individually in terminals:

make run-backend
make run-front
make run-overlay

Usage Guide

Actor Setup

  • Create actors via backend script:

npx tsx back/src/scripts/seedActors.ts

  • Or create manually via frontend at http://localhost:5173, "Actor Management" section. Roles: Patient, Doctor, Pharmacy, Insurance.

Prescription Workflow

  • Login as Doctor → create prescriptions

  • Patient → share prescriptions with Pharmacy

  • Pharmacy → verify and dispense medications

  • Patient → confirm medication receipt

  • Insurance → verify coverage via shared prescriptions

API Endpoints

  • /v1/actors - DID and actor management

  • /v1/prescriptions - Create and manage prescriptions

  • /v1/enhanced/prescriptions - Token-authorized prescription workflows

  • /v1/shared-prescriptions - Prescription sharing management

(See backend route files back/src/routes/ for full API docs)

Security Features

  • Decentralized Identifiers (DIDs) for verified identity management

  • Verifiable Credentials for secure prescription proofs

  • Blockchain immutability for tamper-proof tracking

  • Token authorization to prevent prescription abuse

Testing

  • Backend tests:

cd back
npm test

  • Frontend tests:

cd front
npm test

Performance & Scalability

  • Modular microservice architecture

  • MongoDB for scalable document storage

  • Overlay network for efficient blockchain interaction

  • Supports multiple concurrent prescription workflows

Troubleshooting

Issue
Cause
Solution

Backend not running

Environment setup missing

Run make setup-env then restart services

MongoDB connection failed

Overlay not running or config error

Ensure overlay running and env variables set

DID creation errors

Overlay or network issues

Check overlay logs and blockchain connectivity

Prescription workflow stuck

Token authorization failure

Verify token availability and permissions

Resources

For business context and workflow descriptions, refer to the business document.

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