cordapp-example-nodejs-server-graalvm

This example demonstates a nodejs server which uses corda rpc-3.1 library running in GraalVM. The nodejs server serves APIs to create IOU, fetch IOUs similar to the cordapp-example

Pre-requisites

• Cordapp-example network
• GraalVM environment

Setting Up the GraalVM environment

• Follow the official GraalVM documentation on how to setup the Graal for linux or osX.
• To learn more about GraalVM refer to the Mike Hearn's blog

Steps to the run the node.js server with GraalVM

• Run the cordapp-example nodes
• Make sure that the nodeConfig.json file matches the settings of a running node
• Run ./gradlew printClassPath once to make sure everything is downloaded. You should see a big classpath be printed.
• Run npm install from root directory of the project to install express and body-parser npm modules.
• Run node --jvm --jvm.cp=$( ./gradlew -q printClasspath ) server.js
• Output will look like: PartyA Node.js server listening on port 3000

TroubleShooting

If you get the following error when starting the server, you need to install GraalVM:

node: bad option: --jvm
node: bad option: --jvm.cp=

Interacting with the Cordaapp-example network to create IOUs from nodejs server

1. Create-iou

curl -d '{"iouValue":10, "otherPartyOrgName":"PartyB","otherPartyOrgCountry":"New York", "otherPartyOrgLocality":"US"}' -H "Content-Type: application/json" -X POST http://localhost:3000/api/example/create-iou

2. Fetch IOUs

curl http://localhost:3000/api/example/ious

Other endpoints

• GET /api/example/me
• GET /api/example/peers