MedTech Chain Chaincode

Project Structure

• config/: Contains configuration related to code style.

• crypto/ (git ignored): Contains all the crypto material required to run Chaincode as a Service. Use the copy-crypto.sh script to copy the crypto material generated in the tools repository. (This might change in the future to ease the process)

• docker/: Contains docker entrypoint script for Chaincode as a Service deployment.

• libs/: Contains external libraries that are not published on an online repository (e.g., medtechchain protos).

• scripts/: Contains utility scripts. If the scripts need to access a different repository (e.g., tools or protos), the developer can either specify the absolute path to the repo or make sure that this repository and the one needing to be accessed have the same parent directory. It is recommended to place all repositories in a common parent directory.

Source code

• nl.medtechchain.chaincode.contract: Contains the definitions of the smart contracts.

• nl.medtechchain.chaincode.encryption: Contains the implementation of homomorphic encryption. (Still in progress and requires careful design choices to facilitate modularity and extensibility.)

Deployment

Classic

Currently, the only implemented chaincode deployment is by following the default lifecycle (package, install on peers, ...). The deployment is performed by automation scripts from the tools repository,

Chaincode as a Service (CaaS) (In progress)

All Docker-related files are used to run the chaincode as an external service, but the current development infrastructure is not currently configured to use external chaincode. This makes development process cumbersome. CaaS might make the development process easier.

The docker-compose.yaml specifications (e.g., networks, environment variables) are made to match the infrastructure (e.g., the chaincode should be in the same Docker network as the peers).

openssl req -nodes -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -subj "/C=NL/ST=Zuid-Holland/L=Delft/O=MedTechChain/CN=chaincode.peer0.medtechchain.nl" -addext "subjectAltName=DNS:chaincode.peer0.medtechchain.nl"

awk 'NF {sub(/\r/, ""); printf "%s\n",$0;}' key.pem