digital_healthcare

electronic health records on blockchain

demo: http://digital-healthcare.herokuapp.com/

Note: Demo url to work you need to have metamask extension installed in your browser and to buy fake tickets you need to have fake ethers from rinkeby faceut.

Optimized contract can be found in contracts/optimized_healthCare.sol

Summary

Project stores patient records on blockchain(hybrid). Hybrid because files are not stored on blockchain, but access information is stored on blockchain. There will be two participants doctor and patient.

• Doctor register by providing name.
• Patient register by providing name and age.
• Patient uploads files and provides random nounce to encrypt the file, file will be uploaded to IPFS and secret is stored in ethereum.
• Patient provides access to particular doctor.
• Once doctor is given access by patient, he will be able to see patient's address in his home page.
• Doctor can get all files ipfs hash of patient and send request to node app for file view.
• Node app will fetch file from ipfs and get secret from blockchain, decrypt file and send it to doctor.

Note

Code has been tested only with ganache, not with any testnet.

Project setup

HTTP_PROVIDER = provider url ex: http://127.0.0.1:7545
IPFS_HOST = currently infura (can be changed to local node as well)

1. Start Ganache
   Contract can be deployed to any network, In my case ganache. Update CONTRACT_DEPLOYED_PORT in env, which can be found in build -> contracts -> HealthCare.json -> "networks".

2. Start react server
   npm run start
    visit http://localhost:3000

3. Start node app
   npm run server

4. Connect metamask to ganache and Import ganache accounts to metamask
   ex: http://localhost:7545

High Level Use Case

Sign In

    User should sign challenge to login, after which jwt token will be issued

Upload Files

    Here we have two layer of security

1. hash provided by ipfs(ie. files can be accessed only if file hash is known)
2. file uploaded to ipfs is encrypted by secret (however secret is not encrypted in ethereum, should be done in future)

Access Files

TODO

• Test cases, Currently deployment and registation tests has been written.
• Encrypt file secret while saving on ethereum (can be encrypted or NuCypher etc)