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CCF Data Reconciliation Application

This is the CCF Data Reconciliation - sample in typescript.

Overview

The CCF network will be used to host a reconciliation service where different parties with membership (banks and data providers) will be able to submit their own data to be reconciled against "each other's data" in a confidential manner without exposing the data to other members in the network.

When a new record(s) is submitted through ingestion endpoints, the application will search the key-value store by the record's key; if this key does not exist, it will be added; otherwise, a vote is added to this record with a member ID and the submitted value.

Architecture

The reconciliation application consists of three main parts: Data Ingestion, Data Reconciliation and Data Reporting.

  • Data ingestion
    • API Endpoint: allow members to submit their data to reconciled.
      • Accept single or batch of records
  • Data reconciliation
    • Data is compared across all members, all members' data carry equal weight to reach consensus.
    • Reconciliation is on each record, not on the entire data set.
  • Data reporting
    • API Endpoint: Members will query for results
      • Query by specific record by a unique identifier
      • Query all data

architecture diagram

Repository Layout

📂
├── docs                Sample application documentation
│   └── adrs            All Architecture decision records (ADR)
│
├── governance
│    └── constitution    CCF network constitution files
│    └── nodes           CCF network nodes configs
│    └── scripts         All governance scripts
│    └── vote            Contains proposal voting acceptance and rejection logic
│
└── src                 Application source code
│    └── endpoints      Application endpoints
│    └── models         Domain models
│    └── repositories   Data repositories
│    └── services       Domain services
│    └── utils          utility classes
│
└── test
     └── data-samples    Data files for tests|demo
     └── e2e-test            Application end to end tests
     └── unit-test            Application unit tests

Getting Started

To get started and run the application locally, start with setting up the environment.

# setup the environment
git clone https://github.com/microsoft/ccf-app-samples # Clone the samples repository
code ccf-app-samples                                                 # open samples repository in Visual studio code

# In the VScode terminal window
cd data-reconciliation-app                             # Navigate to reconciliation sample folder
make build                                             # Build and create the application deployment bundle

Now the environment is ready, and there are several scenarios that could be executed at this stage.

  • Run the application's e2e-tests in a sandbox environment in the interactive mode

    • make demo

  • Run the application's e2e-tests in a sandbox (simulated) environment

    • make test

  • Run the application's e2e-tests on a Docker Container running a virtual (simulated) environment

    • make test-docker-virtual

  • Run the application e2e-tests on a Managed CCF environment

    • First, create a Managed CCF instance on your Azure subscription. Please follow here
    • Run the e2e-test, please follow here

  • Start a CCF network with 3 active members and 1 user using the sandbox and deploy the application to it, the application and network are ready to receive requests

    • make start-host

  • Run the application's unit tests

    • make unit-test

These are the main scenarios; more commands are defined in Makefile and are described in the following section.

Make file

A Makefile provides a front-end to interact with the project. It is used both locally, during CI, and on GitHub Actions. This Makefile is self-documented, and has the following targets:

help                 💬 This help message :)
build                🔨 Build the Application
build-virtual        📦 Build Virtual container image from Dockerfile
build-enclave        📦 Build Enclave container image from Dockerfile
start-host           🏃 Start the CCF network using Sandbox.sh
test                 🧪 Test the Data Reconciliation Application in the sandbox
test-docker-virtual  🧪 Test the Data Reconciliation Application in a Docker sandbox
test-docker-enclave  🧪 Test the Data Reconciliation Application in a Docker enclave
test-mccf            🧪 Test the Data Reconciliation Application in a Managed CCF environment
e2e-test             🧪 Run end to end tests
unit-test            🧪 Run the Application unit-test
demo                 🎬 Demo the Data Reconciliation Application
demo-code-change     🎬 Demo the Data Reconciliation Application Code Change
clean                🧹 Clean the working folders created during build/demo

Testing

The application testing strategy depends on two main types of testing to maintain code quality and coverage:

  • Unit testing: to test the application’s business logic (domain models and services), please follow here
  • End to end testing: to test application’s workflows from beginning to end, please follow here
cd data-reconciliation-app    # Navigate to reconciliation sample folder
make unit-test                # Run the unit tests
make test                     # Run the end-to-end(e2e) tests

Demo

It is also possible to run the tests in Demo mode. This can be achieved by running

cd data-reconciliation-app    # Navigate to reconciliation sample folder
make demo                     # Run interactive end-to-end(e2e) tests

There is a guide here explaining what the demo shows. This will run the tests but require manual intervention so you can inspect the state of the network.