isabella232 / hub-sdk-js-sample

Sample app demonstrating use of the DIF Identity Hub JavaScript SDK.

Identity Hub JavaScript SDK Sample

This repository contains a sample app using the DIF Identity Hub JavaScript SDK.

For more details about the APIs used, see the Hub SDK API Reference.

Running the sample app

To run the sample app, clone this repository locally and then run:

npm install
npm run build
npm run start

How it works

The sample app stores objects representing to-do items in your Hub:

1. When you add a new to-do, the app authors a create commit to instantiate a new object and issues a HubWriteRequest to commit the operation to your Hub.

2. When you change the done state of a to-do, the app authors an update commit. This commit references the object_id of the to-do and contains the updated to-do state. The app then issues a HubWriteRequest to commit the update operation to your Hub.

3. When you delete a to-do, the app authors a delete commit referencing the object_id of the to-do and issues a HubWriteRequest to commit the delete operation to your Hub.

4. When you close and re-open the app, the app fetches any existing to-dos from your Hub. The app issues a HubObjectQueryRequest to identify the object_ids of all objects having the to-do schema. The app then issues a HubCommitQueryRequest to retrieve the constituent commits of all of the identified objects. Once all commits are retrieved, the app uses the CommitStrategyBasic strategy to compile the commits into the final state of each to-do.

The code interacting with the Hub JS SDK is mostly found in the src/HubStore.ts file.