Sequence (SQNC) Identity Service

Description

A Node.js API to support communication to the Substrate-based sqnc-node (via polkadot-js/api) and an IPFS node.

Getting started

First, ensure you're running the correct version of npm, then install dependencies using:

npm install

Bring up dependency services (PostgreSQL, sqnc-node and Keycloak) with

docker compose up -d

And run the DB migrations

npm run db:migrate

Environment Variables

sqnc-identity-service is configured primarily using environment variables as follows:

variable	required	default	description
SELF_ADDRESS	Y	-	Blockchain transacting address for this instance of Sequence
SERVICE_TYPE	N	sqnc-identity-service	Logging level. Valid values are [trace, debug, info, warn, error, fatal]
PORT	N	3001	The port for the API to listen on
API_HOST	Y	-	The hostname of the sqnc-node the API should connect to
API_PORT	N	9944	The port of the sqnc-node the API should connect to
LOG_LEVEL	N	info	Logging level. Valid values are [trace, debug, info, warn, error, fatal]
DB_HOST	Y	-	Hostname for the db
DB_PORT	N	5432	Port to connect to the db
DB_NAME	N	sqnc	Name of the database to connect to
DB_USERNAME	Y	-	Username to connect to the database with
DB_PASSWORD	Y	-	Password to connect to the database with
API_SWAGGER_BG_COLOR	N	#fafafa	CSS _color* val for UI bg ( try: e4f2f3 , e7f6e6 or f8dddd )
API_SWAGGER_TITLE	N	IdentityAPI	String used to customise the title of the html page
API_SWAGGER_HEADING	N	IdentityService	String used to customise the H2 heading
IDP_CLIENT_ID	Y	-	OAuth2 client-id to use in swagger-ui
IDP_PUBLIC_ORIGIN	Y	-	Origin of IDP from outside the cluster
IDP_INTERNAL_ORIGIN	Y	-	Origin of IDP from inside the cluster
IDP_PATH_PREFIX	N	/auth	Path prefix to use when constructing IDP API paths.
IDP_OAUTH2_REALM	Y	-	Realm to use when authenticating external users
IDP_INTERNAL_REALM	Y	-	Realm to use when authenticating cluster internal users

Running the API

Having ensured dependencies are installed and running + the relevant environment variables are set, the API can be started in production mode with

npm run build

Then

npm start

To run in a development environment it may be helpful to instead run with

npm run dev

Running with tracing

If you would like to run in a dev mode with tracing enabled, please run:

# start dependencies with
docker-compose -f ./docker-compose.yml -f ./docker-compose.telemetry.yml up -d
# install packages
npm i
# run migrations
npm run db:migrate
# start service in dev mode with telemetry collection enabled
npm run dev:telemetry

Then navigate to Jaeger UI to view traces http://localhost:16686/.

API specification

The API is authenticated using the Oauth2 client-credentials flow. When using the docker-compose workflow for development a keycloak instance is deployed with a preconfigured client sqnc-identity-service with secret secret. These can be entered on the swagger ui at http://localhost:3000/swagger for experimenting with the API.

GET /members

The address parameter identifies the user running this process, and the alias representing a more friendly name version of this. The default value of the latter is null, and is optionally set.

[{ "address": "5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY", "alias": "ALICE" }]

PUT /members/:address

The address parameter identifies the user running this process, and the alias representing a more friendly name version of this. The default value of the latter is null, and is optionally set.

{ "address": "5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY", "alias": "ALICE_UPDATED" }