EHR - Electronic Health Record System

Overview

The EHR (Electronic Health Record) system is a blockchain-based application designed to manage user registrations and permissions securely and transparently. Leveraging Ethereum smart contracts, the system provides a decentralized solution for handling user data and permissions.

Tech Stack

• Blockchain Platform: Ethereum
• Programming Language: Solidity
• Smart Contract Version: ^0.8.0
• Development Environment: Remix IDE or Truffle Suite (for testing and deployment)
• Deployment: Ethereum Mainnet or test networks like Rinkeby or Ropsten

Components

1. Registry Contract

File: Registry.sol

Purpose: Manages user registrations and roles.

Key Features:

• State Variables:

  • creator: Address of the contract creator.
  • totalUsers: Number of registered users.
  • user: Mapping from public key to user role.
  • registered: Array storing registered public keys.
  • roles: Array of predefined user roles.

• Events:

  • UserRegistered: Emitted when a new user is registered.

• Functions:

  • checkUser(uint256 publicKey): Checks if a user is registered.
  • registerUser(uint256 publicKey, string memory role): Registers a new user with a specified role.

2. Permission Contract

File: PermissionContract.sol

Purpose: Manages permission requests and approvals between registered users.

Key Features:

• Struct:

  • Permission: Stores details about permissions, including the granter, requester, and approval status.

• Events:

  • PermissionRequested: Emitted when a permission request is made.
  • PermissionApproved: Emitted when a permission request is approved.

• Functions:

  • requestPermission(uint256 granterPublicKey): Allows a user to request permission from another user non-incentive based.
  • approvePermission(uint256 requesterPublicKey): Allows a user to approve a permission request non-incentive based.
  • isPermissionApproved(uint256 granterPublicKey, uint256 requesterPublicKey): Checks if a permission has been approved.

Dependencies:

• Registry Contract: This contract depends on the Registry contract for verifying user registration and handling user roles.

Installation & Setup

1. Clone the Repository:

   git clone https://github.com/alucard017/EHR.git
   cd EHR