Verity

Development Environment

OS Requirements

verityuses native libraries that must be built for the target OS. These libraries are currently only built for a couple of LTS releases of Ubuntu.

• 18.04
• 20.04

Because of this, development of verity requires (or at least this guide requires) use of one of the above versions of Ubuntu (either native or in a docker container)

JDK

verity targets JDK 1.11 (normally openjdk)

Install (Ubuntu):

sudo apt install openjdk-11-jdk

Scala and SBT

verity is written in scala and built using SBT. Scala is installed with SBT, so only SBT needs to be installed.

Install (Ubuntu):

See instructions on sbt website.

envFullCheck

There is an sbt task that checks and helps guide setup of the development environment. Run the following in repo's root directory:

sbt envFullCheck

The output should help guid developers to identify missing tools and libraries in the environment. If the tool or library is missing, the output will provide general guidance on how to still the missing element.

There are currently three scopes:

• Core -- Tools and libraries required to build and run unit tests.
• Integration -- Tools and libraries required to build and run integration tests.
• IntegrationSDK -- Tools and libraries to required to build and run integration tests on specific SDKs.

Lightbend Integration

There is one object in the project that requires dependencies form Lightbend Commercial (see verity/src/main/scala/com/evernym/verity/metrics/backend/LightbendTelemetryMetricsBackend.scala).

Use Lightbend Commercial:

• Get your credential token form Lightbend at: https://www.lightbend.com/account/lightbend-platform/credentials
• Put the credential token in a local file at $HOME/.sbt/lightbend_cred.txt
  • Note: $HOME/.sbt/lightbend_cred.txt should only have the credential token and NOT full URL as shown in the above page. Should look like lln2VuiZnVOumJ6RK_U0OMZ1S_IPGWgBda82Iy87hfCtFyEu (Not a real token)

Intellij Exclusion

SBT will automatically exclude the Lightbend Object when the credential token is not available BUT Intellij is not so smart. It most must be manually excluded. This can be easily done via this setting in Intellij -- File | Settings | Build, Execution, Deployment | Compiler | Excludes

Development Tasks

Compile

The following sbt task will compile the main verity project and its assoicated tests.

sbt compile test:compile

Compile ProtoBuf Objects:

We are using protobuf to generate event case classes to support schema evolution. If you get errors in an IDE because of missing object, you may need to generate the protobuf object. That can be down as follows:

sbt protocGenerate test:protocGenerate

If that doesn't resolve it, try cleaning before generate protobuf object and compiling:

sbt clean
sbt protocGenerate test:protocGenerate
sbt compile test:compile

Unit Tests

sbt test

Integration Tests

See details here: integration-tests/README.md

Development Process

All developers are expected to do the following:

1. Keep the default branch (i.e. main) stable
2. Follow TDD principles to produce sufficient test coverage
3. When collaborating with other team members, prepend 'wip-' to a branch name if a branch is not ready to be vetted/tested by GitLab CI/CD pipelines. Doing so allows developers to push to origin w/o needlessly consuming resources and knowingly producing failed jobs.
4. Get new and current tests (unit and integration) passing before submitting a merge request
5. Use a puppet devlab environment to test artifact installation/upgrade
6. Use a puppet devlab environment to develop (write and test) puppet code used to maintain Team and production environments.
7. Have at least one peer review merge requests (MR)
8. Once an MR has been merged, and artifacts have been published, upgrade the team environment and assign another team member to test the changes using the team environment

Test Deployment Environment

Once all unit and integration tests are passing, use a devlab environment (see puppet-agency-devlab) to test the installation/upgrade of artifacts (debian packages) and develop new Puppet code needed to install and configure artifacts in Team and production environments. The resulting devlab environment should be sufficient for performing integration tests with connect.me, CAS, EAS, libvcx, VUI, etc., as well as ensuring older versions of those artifacts still operate with newer versions of Verity.

Remote Debugging

All development environments are, by default, configured to allow remote debugging using JDWP port 5005 on CAS/EAS/VAS. However, for security reasons, this port is only open to traffic originating from localhost (127.0.0.1). Therefore, developers must use ssh forwarding to remote debug CAS/EAS/VAS in team environments.

The following command routes 5005 localhost traffic to port 5005 on team1's CAS ssh -vAC -L 5005:localhost:5005 dcas-ore-dt101 The following command routes 5006 localhost traffic to port 5005 on team1's EAS ssh -vAC -L 5006:localhost:5005 deas-ore-dt101

Developers can then create a "Remote" debug session in IntelliJ by:

• Checking out the commit has used to build the deployed artifact
• Run > Edit Configurations > + > Remote
• Set 'Debugger Mode' to 'Attach to remote JVM'
• Set 'host' to localhost and 'port' to the local port you chose when setting up ssh forwarding (i.e. 5005, 5006 from the examples above)
• Set breakpoints
• Click the "debug" symbol next to the run script and do what it takes for the remote service to hit your breakpoints. Integration tests, Verity UI, Verity SDK, and Connect.Me are typically used to do so.

Acknowledgements

This effort is part of a project that has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No 871932 delivered through our participation in the eSSIF-Lab, which aims to advance the broad adoption of self-sovereign identity for the benefit of all.