This repo is an example of how to build a QuickNode Marketplace add-on using Ruby on Rails and PostgreSQL.

It implements the 4 provisioning routes that a partner needs to integrate with Marketplace, as well as the required Healthcheck route.

It also has support for:

• RPC methods via a POST /rpc route
• A dashboard view with Single Sign On using JSON Web Tokens (JWT).

To install and run the application locally:

1. Clone this repo.
2. bundle
3. Update the this README.md file to have the name of your add-on, etc...
4. Update config/database.yml, config/cable.yml, and config/envirotnments/production.rb file and replace marketplace_starter_rails with the name of your application.
5. cp .env.example .env and then update as you see fit.
6. bin/rails db:create
7. bin/rails db:migrate
8. Edit your credentials/secrets using bin/rails credentials:edit.
9. Install foreman: gem install foreman
10. Run the specs with bin/ci and check spec coverage with open coverage/index.html
11. Start the application in development mode with bin/dev
12. Visit http://localhost:3009/

The application has 4 provisioning routes protected by HTTP Basic Auth:

• POST /provision
• PUT /update
• DELETE /deactivate_endpoint
• DELETE /deprovision

It has a public healthcheck route that returns 200 if the service and the database is up and running:

• GET /healthcheck

It has a dashboard that can be accessed using Single Sign On with JSON Web Token (JWT):

• GET /dash/:id?jwt=foobar

It has an JSON RPC route:

• POST /rpc

To add a new RPC method, simply add a new file to the app/services/rpc_method_handlers directory following the naming convention where the filename should be the name of the method lowercased and using _ (for example: eth_send_raw_transaction or qn_get_token_balance) and the class should be inside the RPCMethodHandlers module and have a name in camel case (for example, EthSendRawTransaction or QnGetTokenBalance). These handlers must have an initialize class that accepts the params and have a call method which should return a ruby hash that can be converted to JSON using .to_json.

As an example, take a look at app/services/rpc_method_handlers/qn_hello_world.rb or app/services/rpc_method_handlers/eth_send_raw_transaction_faster.rb

This Rails app has a service object that makes it easy to make RPC calls to the customer's endpoint. You can use it like this:

endpoint = Endpoint.last service = EndpointService.new(endpoint) response = service.rpc_call('eth_blockNumber', []) puts response

You can use the qn-marketplace-cli tool to quickly test your add-on while developing it.

For the commands below, the --basic-auth flag is the Base64 encoding of username:password. You need to make sure to replace that with your valid credentials (as defined in your bin/rails credentials:edit).

../qn-marketplace-cli/qn-marketplace-cli healthcheck --url http://localhost:3009/healthcheck

../qn-marketplace-cli/qn-marketplace-cli pudd --base-url http://localhost:3009 --basic-auth dXNlcm5hbWU6cGFzc3dvcmQ=

Below, make sure that the jwt-secret matches QN_SSO_SECRET in bin/rails credentials:edit

../qn-marketplace-cli/qn-marketplace-cli sso --url http://localhost:3009/provision --basic-auth dXNlcm5hbWU6cGFzc3dvcmQ= --jwt-secret jwt-secret --email nicolas@example.com --name "Nicolas Anelka" --org PSG 

../qn-marketplace-cli/qn-marketplace-cli rpc --url http://localhost:3009/provision --rpc-url http://localhost:3009/rpc --rpc-method qnHelloWorld --rpc-params "[\"abc\"]" --basic-auth dXNlcm5hbWU6cGFzc3dvcmQ= --verbose

../qn-marketplace-cli/qn-marketplace-cli rpc --url http://localhost:3009/provision --rpc-url http://localhost:3009/rpc --rpc-method eth_sendRawTransactionFaster --rpc-params "[\"abc\"]" --basic-auth dXNlcm5hbWU6cGFzc3dvcmQ= --verbose

To deploy to heroku:

1. Ensure you have the Heroku CLI installed on your machine.
2. Login to Heroku from CLI: heroku login
3. Create the application heroku apps:create <your app name>. Make sure you replace <your app name> with the name of your add-on.
4. Add Postgresql database: heroku addons:create heroku-postgresql:basic. You can change to a bigger plan such as standard-0 or standard-2 instead of basic if you want a more robust database.
5. Set your master key on heroku config for rails credentials: heroku config:set RAILS_MASTER_KEY=yourkey
6. Deploy it with git push heroku main
7. Open the app: heroku open
8. Verify that the healtheck endpoint works by adding /healthcheck at the end of the URL from previous step. You should see a green page.

MIT